JP3099265B2 - Concavo-convex molded sheet and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stretchable garment material used as a garment for various sportswear, for example, and a method for producing the same. The present invention relates to a concavo-convex molded sheet provided with designability and other functionality by providing minute projections, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, various sheet-like members have been subjected to unevenness processing on the surface of the above-mentioned sheet-like members in order to impart design properties and anti-slip properties and to improve mechanical strength such as tear strength. Various things have been proposed. The present applicant has also filed dozens of applications, including Japanese Patent Application No. 7-310128, and uses a stencil or intaglio to manufacture uppers and soles for sports shoes. It discloses a structure in which a concave-convex pattern of a predetermined shape made of an elastomer is formed in close contact with a base sheet made of such a material, and a method of manufacturing the same.

[0003] On the other hand, recently, there has been appeared one that has been subjected to uneven processing on clothing such as various sportswear. Many of these are intended mainly to improve the design, and in the past, only flat patterns etc. could be applied to the surface of clothing by dyeing, weaving, differences in knitting, printing etc. In contrast to the above-mentioned construction mode, a new construction mode of adding a three-dimensional uneven pattern having a different clothing material and a different material is adopted. In addition, there is a women's swimsuit for swimming, which uses a concavo-convex pattern applied to clothing to impart functionality other than the above-described design.

In this apparatus, the turbulence generated by the stroke motion of the athlete's scratching hand, the impact on the water surface at the time of entering and exiting water, or the movement of the upper body and the body shape due to the breathing is made laminar and given to the athlete. It is applied to keep water resistance as low as possible. Specifically, the swimsuit for swimming is provided at the front breast, the back waist or the side lower part of the side part, the hip bone part, and the like. It is configured by arranging in a streak shape in the direction along the flow. In addition, as a conventional method of applying such minute projections to the cloth surface of a swimsuit for swimming, a method using foamed ink, a high-frequency welder, a method using injection molding and foam molding, and the like can be mentioned.

[0005] However, in the method using foamed ink, it is impossible to form minute projections of a desired shape, and in the method using a high-frequency welder, the height of the minute projections that can be formed is limited (usually up to 1 mm). is there. Further, in the method by injection molding, the temperature at the time of molding is high, and there is a problem that the fabric is damaged or deformed. In addition, the cost for making a mold is also high. Furthermore, in the method using foam molding, there is a tendency that the minute projections are continuous, and it becomes difficult to form independent minute projections,
There is a problem that the expansion and contraction of the fabric between the fine projections is also hindered. Therefore, in either case,
Fine projections having a desired shape and height could not be formed, and the appearance and performance of the swimsuit for swimming formed thereby were not necessarily sufficient.

With regard to the performance aspect, the conventional swimsuit for women formed in this manner may have a small adhesive area to the cloth due to the minute projections. The fixing power was weak, and there was concern that the toner might fall off due to peeling. Also, this is one of the factors that make it impossible to increase the height of the microprojections. To obtain a desired laminar flow conversion effect, the height of the microprojections is originally set to 1 mm or more, and several mm is desired. It was not possible, and it was desired to present some solution to solve this.
Further, when the minute projections are formed by such a method, the weight is increased by the amount of the minute projections to be formed, which is not always sufficient in the field of use where weight reduction is required.

[0007]

[Technical matters to be solved] The present invention has been devised based on the recognition of such background, and has been devised based on the recognition. Focusing on the properties of the fabric that has more elasticity based on the manufacturing technology of the uneven molded sheet that the applicant has cultivated so far, by establishing a new method for forming minute projections using the properties of the fabric An object of the present invention is to propose a novel concavo-convex molded sheet that has attempted to solve the above-mentioned problem, and a method for producing the same.

[0008]

According to a first aspect of the present invention, there is provided a sheet-shaped member formed by forming a plurality of minute projections on one surface of a stretchable base sheet to exhibit a desired uneven pattern. the microprojections are formed by the microprojections forming resin consisting of a portion of the stretchable matrix sheet and a thermosetting resin or the like, Note and one of these is in close contact formed along the other of the inner surface shape shall In
In this close contact state, the uncured microprojection forming resin expands and contracts.
Cured while entangled with the fibers constituting the base sheet
It is characterized by having been obtained by doing. By using such specific features of the invention as a means, the bonding area is increased as compared with the conventional uneven molded sheet in which the fine protrusions are simply adhered to the elastic base sheet in a planar manner. Bonding between the sheet and the resin for forming minute projections is strengthened. Accordingly, the height of the minute projections can be set high, and the problem can be solved.

According to a second aspect of the present invention, in addition to the above-mentioned requirements, the minute projections are formed by a minute projection forming resin disposed on the surface side, and the minute projections are formed on the inner surface of the minute projection forming resin. A part of the stretchable base sheet enters along the stretched base sheet and is formed in close contact with the stretched base sheet. By using such specific features of the invention as a means, it is possible to reduce the amount of the resin for forming minute projections and to contribute to the weight reduction of the entire concavo-convex molded sheet. Therefore, it is extremely useful especially in the field of use where weight reduction is required. Thus, the problem is solved.

[0010] Furthermore, in the irregularly formed sheet according to the third aspect, in addition to the requirement of the first aspect, the minute projections may further include:
A part of the stretchable base sheet is arranged on the front side in a stretched state, and a part of the stretched stretchable base sheet forms a projection shape from the inside so as to follow the inner surface shape of the stretchable base sheet. It is characterized in that the resin for forming minute projections is formed in close contact. And by using such an invention-specific matter as a means, a specially shaped concavo-convex molded sheet in which the microprojection-forming resin does not appear on the surface is obtained, which can contribute to the expansion of the design of the concavo-convex molded sheet, This solves the problem.

[0011] Furthermore, the uneven molded sheet according to claim 4 is characterized in that, in addition to the above requirements, the thermosetting resin or the like is a polyurethane elastomer. And by using such invention-specific matters as a means, in addition to facilitating and speeding up the molding of the concavo-convex molded sheet by shortening the thermosetting time, since the molding at a low temperature is possible, the stretchable base sheet is used. Without damaging or deforming the sheet, thus contributing to the improvement of the appearance of the concavo-convex molded sheet, thereby solving the above-mentioned problems.

Further, according to a fifth aspect of the present invention, there is provided a method of manufacturing a concavo-convex molded sheet, comprising: placing a bottom plate on a base; and further placing a stencil having holes of a predetermined shape formed in a pattern on the bottom plate. Or, a concave plate having a predetermined shape in which a concave portion is formed in a pattern is placed on the base, and a predetermined amount of liquid material before curing is injected into these holes or concave portions,
Thereafter, a stretchable base sheet is placed above the base sheet, and the sheet is pressurized and heated with a projection-forming pressing body acting from above, thereby displaying a desired uneven pattern on one surface of the stretchable base sheet. The present invention is characterized in that a number of minute projections are formed. By using such specific features of the invention as a means, it is possible to utilize almost the existing manufacturing technology of the concavo-convex molded sheet of the present applicant as it is, and to add a configuration in which a projection-forming pressing body is applied thereto, to obtain a desired shape. This makes it possible to efficiently produce a concave-convex molded sheet having functionality, thereby solving the above-mentioned problems.

According to a sixth aspect of the present invention, in addition to the requirement of the fifth aspect, the projection-forming press body is formed of a soft foam sheet.
In forming the minute projection, a part of the projection forming pressing body is deformed by pressurization, and the deformed portion is formed by a pressing action by entering into the hole or the concave portion. Things. And by using such invention specific items as a means, a single projection-forming pressing body can be used to form various types of microprojections without being affected by differences in the form, size, and arrangement of the microprojections. In addition to being able to be formed, the manufacturing cost of the unevenly formed sheet can be reduced, and it is also useful to improve the manufacturing efficiency because there is no need to particularly pay attention to the alignment of the protrusion-forming pressing body. It can contribute.

According to a seventh aspect of the present invention, in addition to the requirement of the fifth aspect, when the predetermined amount of the liquid material before curing is injected, a squeegee treatment is performed after the excess amount is injected. It is characterized by doing. By using the invention specific items as means, it is possible to inject a predetermined amount of the uncured liquid raw material into the holes or the concave portions without excess or deficiency, which can contribute to solving the above-mentioned problem.

Further, in the method of manufacturing an uneven molded sheet according to the present invention, in addition to the requirements described in the above-mentioned claim, a predetermined amount of the liquid material before curing is injected by using an injection needle and extruded from the injection needle. The diameter of the tip droplet of the liquid material before curing is smaller than the diameter of the hole or the concave portion, and the tip droplet is injected while maintaining a solid state. By using such invention-specific items as means, a desired predetermined amount of the liquid material before curing can be injected into the holes or recesses without entraining air, which can contribute to solving the above problem. It is.

According to a ninth aspect of the present invention, in addition to the requirement of the sixth aspect, a foamed silicone gel obtained by making a silicone gel porous is used as the soft foamed sheet. It consists of. By using the invention specific items as means, particularly when a silicone gel made porous by an elution method is used as the foamed silicone gel, moderate elasticity, deformability, strength, and air permeability are obtained. Since it has a small recess or hole, it smoothly enters so as to follow the inner surface shape, exhibits good pressing force, and has the effect of discharging mixed air to the outside. Does not form a defect on the surface of the projection due to the residual air. Furthermore, when a polyurethane elastomer (non-silicone-based elastomer) is used as the liquid material before curing, the silicone-based soft foamed sheet and the liquid material before curing have a property that it is difficult to adhere to the material. Since it can endure well, it can contribute to solving the above-mentioned problem.

Further, according to a tenth aspect of the present invention, there is provided a method of manufacturing an uneven molded sheet, wherein a stretchable base sheet is fixed to a molded concave mold in which a molded concave part having a predetermined shape is formed in a pattern, and the primary molded convex is formed from above. By forming a mold, a forming guide recess is formed in a part of the stretchable base sheet. Thereafter, a liquid material before curing is injected into the forming guide recess, and a secondary molding convex is operated from above. And pressurizing and heating in such a state, thereby forming a large number of fine projections that express a desired uneven pattern on one surface of the stretchable base sheet. And by using such invention specific items as a means, even if the squeegee processing step is omitted, it has a desired shape and functionality,
In addition, it becomes possible to manufacture a concavo-convex molded sheet of a type in which the microprojection-forming resin does not appear on the surface, and the above-mentioned problem is solved.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an uneven molded sheet of the present invention and a method for producing the same will be specifically described with reference to the drawings. In the following description, first, the use of the concavo-convex molded sheet of the present invention and basic embodiments thereof will be described with reference to FIGS. 1 and 2 and the concavo-convex molded sheet of the present invention having a partially different configuration. For other embodiments of
After referring to FIGS. 3 (b), 3 (c) and 5, the method for producing the uneven molded sheet of the present invention used when forming such an irregular molded sheet will be described with reference to FIGS.
A description will be given based on four embodiments shown in FIG.

The uneven shaped sheet 1 of the present invention is used for various stretchable clothing materials such as racing suits and gloves for cycling, speed skating suits, and skiing for sports. Competition suits for competition alpine and Nordic events, swimsuits for competition, and the like. These focus on functional aspects such as reduction of fluid resistance and improvement of grip force, but if attention is paid to design, gymnastics,
It can be applied to women's leotards for rhythmic gymnastics, women's or men's leotards for aerobics and jazz dance, and if you focus on the functions such as reinforcement and support of fabric, baseball uniforms It can also be applied to undershirts, stockings, and various supporters.

The concavo-convex molded sheet 1 of the present invention used for such an application basically comprises a stretchable base sheet 2
Is formed by forming a large number of microprojections 3 on one surface to form a desired concavo-convex pattern 4. The microprojections 3 further comprise a part of the stretchable base sheet 2 and a thermosetting resin or the like. One of these is formed by being closely adhered along the other inner surface shape. 1 and 2,
In the embodiment shown in FIG. 3A, the minute projections 3 are formed into a projecting shape by the minute projection forming resin 5 arranged on the surface side, and are formed along the inner surface shape of the minute projection forming resin 5. The figure shows a state in which a part of the elastic base sheet 2 is made to enter and closely adhered in a stretched state.

Hereinafter, these various members will be described more specifically. First, it is desired that the stretchable base sheet 2 has excellent stretchability and has no restriction on the stretch direction. Specifically, a knitted fabric or a nonwoven fabric that can meet such a requirement can be suitably applied. As the knitted fabric, tricot,
It is preferable to use a knitted fabric having an elasticity selected from Russell, sheet woven (plain knitting), milling (rubber knitting), smooth (double-sided knitting), etc., and tricots are easily available and easy to use, and the material is usually a fabric. Natural fibers, such as cotton and silk, and chemical fibers, such as nylon and polyester, are used. When molding a fabric, it is preferable that thermoplastic fibers are mixed.
And furthermore, the surface may be raised. As the nonwoven fabric, any of a papermaking type and a web type can be used, but a web type which is easy to cut and is light, and in which there is no particular fear of fraying, is preferable. Depending on the shape and the number of the minute projections 3 to be formed even in the case of a woven fabric, there are some which can meet the above-mentioned requirements, and of course such a material can be applied.

Next, the minute projection forming resin 5 formed of a thermosetting resin or the like will be described. Here, the thermosetting resin or the like refers to a rubber-like elastic body, and in the present embodiment, a polyurethane elastomer is used as an example. In addition to using a single property of thermosetting resin, etc.,
When the microprojections 3 are formed by a plurality of microprojection elements 30 as described later, a plurality of properties can be used in combination. Examples of the properties used here include color, hardness, elasticity, abrasion resistance, resilience, vibration absorption, thickness, and weight.

The polyurethane elastomer is composed of a mixture of a prepolymer and a polyisocyanate, and is cured by heating. Particularly, a polyurethane elastomer supplied by spraying from a nozzle is suitable for use as a polyurethane elastomer. There is a solvent-free immediate-hard urethane resin manufactured by Kogyo Co., Ltd., for example, trade name Efretan. This is desirably heated before spray mixing by a nozzle, and cures with a gel time of about 20 seconds.
In addition, a solvent can be separately added to these to adjust viscosity and hardness. Examples of polyurethane elastomers include Nipporan (registered trademark) of Nippon Polyurethane Industry Co., Ltd., which is a prepolymer, and Pandex (registered trademark), which is a polyisocyanate of Dainippon Ink Co., Ltd. SX-320A & B of Chemical Co., Ltd. can be used.
It is also expected that it is necessary to prevent the inflow from the intaglio 10, stencil 11 or molded intaglio 18, which will be described later. Therefore, a thickener can be mixed into these raw materials.

Further, other thermosetting resins and the like include, in addition to such polyurethane elastomers, other thermosetting resins such as silicone elastomers which are advantageous for skin contact, and photocuring which can be cured in a short time by irradiation with ultraviolet rays. It is also possible to apply a conductive resin. Further, among such thermosetting resins and the like, Japanese Patent Application No. Hei 7
It is also possible to add a luminous pigment disclosed in -70582, and in this case, additional functions such as improvement in night visibility (safety) are added.

Next, the minute projections 3 composed of a part of the stretchable base sheet 2 and the minute projection forming resin 5 are described.
Will be described. That is, in the present invention, a part of the stretchable base sheet 2 is stretched and deformed, and the stretched and deformed part is also used as a part of the microprojection 3, thereby increasing the bonding area and reducing the resin for forming the microprojection. The use amount of No. 5 is reduced, and the overall weight of the uneven molded sheet 1 is reduced. Therefore, as long as such a condition is satisfied, the minute projections 3 of various shapes and structures can be adopted. For example, in FIG. The projection 3 is shown.

The minute projections 3 are intaglio 10 described later.
This shows an embodiment of a somewhat elongated hollow shape in which the entirety of the fine projections 3 is formed by a curved surface. Further, the embodiment shown in FIG. 3B shows a minute projection 3 of a type in which a minute projection forming resin 5 appears on the surface, similarly to the minute projection 3 shown in FIG. The microprojections 3 are formed by using a stencil 11 described later, and show an embodiment in which the appearance of the microprojections 3 is formed in a flat cylindrical shape or a flat rectangular prism shape. Further, the embodiment shown in FIG. 3C shows a minute projection 3 of a type in which the minute projection forming resin 5 does not appear on the surface. The fine projections 3 are formed by using a molding concave mold 18 described later, and the appearance of the fine projections 3 is entirely curved as in the embodiment shown in FIG. 1 shows a configured hollow embodiment.

Further, it is also possible to form multi-stage or multi-layered minute projections 3 as shown in FIG. This is formed as an example by using two stencils 11 composed of a base side stencil 11A and a front side stencil 11B, as will be described later. This figure shows a microprojection 3 composed of two layers of microprojection elements 30 composed of a side microprojection element 30B. In this embodiment, the base-side microprojection element 30A is constituted by a part of the elastic base sheet 2 and the microprojection forming resin 5, while the front-side microprojection element 30B is formed by the microprojection forming resin 5A. The structure constituted only by the following is shown. Therefore, although there are some difficulties in terms of weight reduction of the concavo-convex molded sheet 1, it can be said that the microprojections 3 are extremely significant in diversifying the design.

Depending on the degree of filling of the elastic base sheet 2, the viscosity of the fine protrusion forming resin 5, or the affinity between the fine protrusion forming resin 5 and the elastic base sheet 2, the fine protrusion forming resin 5 may be removed. Although a part of the elastic base sheet 2 may seep to the back side, it may be cured in this state. In this case, the stretching deformation of the stretchable base sheet 2 is not as extreme as shown in the figure, because the deformation due to the small protrusion forming resin 5 oozing to the back side of the stretchable base sheet 2 may be mitigated.

The concavo-convex molded sheet 1 of the present invention is basically constituted by forming a large number of such fine protrusions 3 on one surface of the elastic base sheet 2. Specifically, a desired concavo-convex pattern 4 is expressed by devising the arrangement of a large number of microprojections 3,
The desired concavo-convex pattern 4 also differs depending on whether the emphasis is on design or on other functions. Incidentally, in the embodiment shown in FIGS. 1 and 2, the uneven molded sheet 1 used for a swimsuit for women is shown,
The emphasis is on the functionality of laminating turbulence generated during use to reduce the resistance of water to an athlete. The above-mentioned functionality is also related to the height of the minute projections 3. By forming the minute projections 3 as described above, it is possible to form the minute projections 3 having a height which was conventionally difficult to mold. It becomes possible to easily form the minute projections 3 of which the optimum is 1 mm or more and several mm. In general, such fine projections 3 exhibit this functionality by being formed in a large number as described above. However, there are applications where the functionality can be exhibited by forming only one or a few. For example, it is of course possible to adopt a configuration corresponding to such an application.

Next, a method for producing the concavo-convex molded sheet of the present invention used to form the concavo-convex molded sheet 1 of the present invention thus constituted will be described. In the following description, (I) a method of manufacturing an intaglio plate used to form the uneven molded sheet 1 having the minute projections 3 as shown in FIG. ), (II) a manufacturing method using a stencil, which is used for forming the uneven forming sheet 1 having the fine projections 3 as shown in FIG. 5, and the fine projections 3 as shown in FIG. (III) a method of using a molded concave mold, which is used for molding the concavo-convex molded sheet 1 having:
Further, (III) the manufacturing method in the case of using a molded concave mold is different in the manufacturing process. (1) In the case of using two types of molded convex molds, and (2) In the case of using a single molded convex mold These two types of manufacturing methods will be described.

(I) Manufacturing method using intaglio (see FIGS. 8, 9 and 13) (i) Place intaglio and inject liquid material before curing (FIG. 8A)
First, the intaglio plate 10 in which the concave portions 10a having a predetermined shape are formed in a pattern in advance is placed on the base B. The material constituting the intaglio 10 may be a relatively soft material such as silicone rubber, or a harder acrylic or
It may be a synthetic resin such as a fluororesin having excellent release properties, or a metal such as aluminum which is lightweight and has excellent thermal conductivity.
Of course, it is necessary to consider the compatibility with the pre-curing liquid raw material P which is a thermosetting resin, and when the releasability is poor, a release agent is spray-coated separately. To deal with. Further, a fluororesin dispersion plating in which a fluororesin is dispersed in a film may be applied to the resin or metal such as the hard acrylic. In consideration of the problem of deformation of the intaglio 10 during pressurization and heating, which will be described later, it is desirable to form the intaglio 10 from a relatively hard material.

The concave portion 1 of the intaglio 10 as described above
The liquid material P before curing is injected into 0a. The pre-curing liquid raw material P means the raw material liquid of the above-mentioned thermosetting resin. For example, when a polyurethane elastomer is injected, a static mixer or the like which is widely used in industry is used. As shown in FIG. 4 (a), in addition to the method of mixing two liquids in a cylinder and injecting them from a nozzle, as shown in FIG. 4 (b), the two liquids of the raw material are sprayed while being mixed at the nozzle tip. Alternatively, when it is not necessary to particularly consider mass production, it is also possible to stir these two liquids in a container and to pour the mixture into the recess 10a. This point can be similarly applied to other manufacturing methods described later.

(Ii) Squeegee treatment (see FIG. 8 (b)).
a into the squeegee device 1 as shown in FIG.
4, the liquid material P before curing existing outside the upper surface of the concave portion 10a is removed to make the liquid material P before curing in the concave portion 10a a predetermined amount. In other words, of the liquid material P before curing in each concave portion 10a, a part of the liquid material P existing immediately below the upper surface of the concave portion 10a is partially replaced with the surface tension between the liquid material P before curing and the concave portion 10a of the intaglio 10 and the tip of the squeegee device 14,
The squeegee device 14 is removed together with the tip of the squeegee device 14 due to the contact angle, wetness and the like. The predetermined amount is an amount required for forming each of the minute projections 3. The excess amount is a total amount of the predetermined amount and a surplus amount removed by the squeegee device 14. In order to reduce waste of the uncured liquid raw material P, the excess amount is set to be as small as possible. Is preferred. In the present embodiment, a squeegee was used using a doctor-knife-shaped sharp edge squeegee blade as the squeegee device 14 so that a large amount of the liquid material P before curing in the concave portion 10a could be removed.

Further, as shown in FIG.
The diameter of the tip of the liquid material P before curing that is extruded from the injection needle 26 may be smaller than the diameter of the concave portion 10a, and the tip may be injected while maintaining the solid state. Here, the “full state” means a state in which air does not exist between the bottom or wall of the concave portion 10a and the liquid material P before curing, and by maintaining this full state at the time of injection, the liquid before curing can be improved. The raw material P is injected into the recess 10a in such a manner that the material P comes into close contact with the air in the recess 10a while being pushed out. Therefore, as shown in FIG. 13 (b), a string-shaped or rod-shaped liquid material P before the curing protrudes from the injection needle 26.
In a situation where the outer circumference is bent and the side circumferences come into contact with each other, air is involved, and therefore, it cannot be said that the state is full. Therefore, according to such a method, it is possible to inject a predetermined amount of the uncured liquid raw material P into the concave portion 10a. However, it is needless to say that an excessive amount is injected and the excess amount is removed by the squeegee. It doesn't matter.

The recess 10 using the injection needle 26 as described above
In the injection of the uncured liquid raw material P into a, for example, the injection needle 26 provided in a single supply mechanism is moved using an NC machine tool so that the injection needle 26 faces the adjacent recess 10a sequentially. And a plurality of injection needles 26 and a supply mechanism are provided according to the position of the concave portion 10a.
It is also possible to simultaneously perform injection into 0a. The movement of the injection needle 26 by such an NC machine tool is as follows.
It can be appropriately selected, for example, only in a plane (XY plane) or in a space (XYZ space). It is preferable that the injection needle 26 is coated with a fluororesin or the like at least on the inner peripheral surface thereof to prevent the liquid material P before curing from adhering. As the supply mechanism, for example, a mechanism for extruding the uncured liquid material P in the cylinder 27 by air is used, and a mechanism for controlling the extrusion amount by adjusting the air pressure and the pressing time is used.

And a thermosetting resin (liquid raw material P before curing)
When a polyurethane elastomer is used, the uncured liquid raw material P in the concave portion 10a is left at room temperature until it is in a semi-cured state. Incidentally, although it depends on the composition and the amount of the liquid material P before curing, a required time of about 10 minutes is required during this time. Of course, it is also possible to shorten the time until semi-curing by slightly heating.

(Iii) Placement of the elastic base sheet and pressing by the protrusion forming pressing body (see FIGS. 9A and 9B) Thereafter, the elastic base sheet 2 is placed on the upper surface of the intaglio 10 and then The projection forming press body 15 is acted from above to extend a part of the stretchable base sheet 2 to reach the concave portion 10a of the intaglio plate 10, and the uncured liquid raw material P in the concave portion 10a.
In close contact. Hereinafter, the protrusion forming press body 15 will be described. Basically, the configuration shown in FIG. 9 can be applied. In this configuration, a part of the projection-forming pressing body 15 is deformed with pressurization, and the deformed pressing portion 16 which is the deformed portion is deformed. With a part of the elastic base sheet 2,
0a, the elastic body sheet 2 is stretched by the pressing action, and is brought into close contact with the liquid material P before curing in a semi-cured state.

In the case where a soft foam sheet is used as the protrusion-forming pressing body 15, the small recess 10a has appropriate elasticity, deformability, strength and air permeability.
Alternatively, even in the case of the hole portion 11a, it smoothly enters so as to follow the inner surface shape thereof, exerts a good pressing force, and has an effect of discharging the mixed air A to the outside. In this case, a defective portion due to the residual air A is not formed. Furthermore, it has a property that it is difficult to adhere to the liquid material P before curing, so that it has excellent releasability and can withstand repeated use. Further, when a foamed silicone gel obtained by making a silicone gel porous is used as the soft foam sheet, when a non-silicone elastomer such as polyurethane elastomer is used as the liquid material P before curing, the silicone soft foam sheet is used. And the liquid raw material P before curing has a property that it is difficult to adhere to the liquid raw material P, so that it has excellent releasability and can withstand repeated use. When a silicone elastomer is used as the pre-curing liquid raw material P, it is preferable to use a fluorine resin-based (non-silicon-based) release agent spray-coated on a flexible foam sheet.

[0039] Here, if such a description in detail for the silicone gel, the intended diorganopolysiloxane represented by the following formula [1] (hereinafter referred to as component A) RR ¹ ₂ Si
_{^{O- (R 2 2 SiO) nSiR}} 1 2 R ... [1] [ wherein, R is an alkenyl group, R ¹ is a monovalent hydrocarbon group having no aliphatic unsaturated bond, R ² one Aliphatic hydrocarbon group (at least 50 mol% of R ² )
Is a methyl group, and when it has an alkenyl group, its content is 10 mol% or less), and n is a number such that the viscosity of this component at 25 ° C. becomes 100 to 100,000 cSt.] Viscosity at 25 ° C of 500
0 cSt or less, and at least two Si atoms per molecule.
An organohydrogenpolysiloxane having a hydrogen atom directly bonded to an atom (component B), and an alkenyl group contained in the component A based on the total amount of hydrogen atoms directly bonded to Si atoms in the component B Is an addition-reaction type silicone copolymer obtained by curing a mixture adjusted so that the ratio (molar ratio) of the total amount becomes 0.1 to 2.0.

The silicone gel will be described in more detail. The component A has a linear molecular structure, and alkenyl groups R at both ends of the molecule are added to hydrogen atoms directly bonded to Si atoms in the component B. Is a compound capable of forming a cross-linked structure. The alkenyl group present at the molecular terminal is preferably a lower alkenyl group,
A vinyl group is particularly preferred in consideration of reactivity.

R ¹ present at the terminal of the molecule is a monovalent hydrocarbon group having no aliphatic unsaturated bond. Specific examples of such a group include methyl, propyl and hexyl groups. Alkyl group, phenyl group and fluoroalkyl group.

In the above formula [1], R ² is a monovalent aliphatic hydrocarbon. Specific examples of such a group include an alkyl group such as a methyl group, a propyl group and a hexyl group, and a vinyl group. Lower alkenyl groups such as groups can be mentioned. However, at least 50 mol% of R ²
Is a methyl group, and when R ² is an alkenyl group, the amount of the alkenyl group is preferably 10 mol% or less. When the amount of the alkenyl group exceeds 10 mol%, the crosslinking density becomes too high and the viscosity tends to be high. And n is
The viscosity of the component A at 25 ° C. is usually 100 to 10
0000 cSt, preferably 200 to 20000 cSt
Is set to be within the range.

The component B is a crosslinking agent for the component A,
The hydrogen atom directly bonded to the i atom is added to the alkenyl group in the component A to cure the component A. The B component may have any of the above-mentioned effects, and may have various molecular structures such as a linear, branched chain, cyclic, or network structure.

In addition, a hydrogen atom and an organic group are bonded to the Si atom in the component B, and this organic group is usually a lower alkyl group such as a methyl group. Furthermore, 25 of the B component
The viscosity at ° C is usually 5,000 cSt or less, preferably 500 cSt or less. Examples of such a component B include organohydrogenpolysiloxanes whose molecular ends are blocked with triorganosiloxy groups, copolymers of diorganosiloxanes and organohydrogensiloxanes, and tetraorganotetrahydrogencyclotetrasiloxanes. copolymer siloxane consisting of HR ¹ ₂ SiO 1/2 units and SiO 4/2 units, and HR ¹ ₂ SiO 1
/ Can be mentioned copolymers polysiloxane composed of 2 units and R ¹ ₃ SiO 1/2 units and SiO 4/2 units. However, in the above formula, R ¹ has the same meaning as described above.

The ratio of the total molar amount of alkenyl groups in component A to the total molar amount of hydrogen atoms directly bonded to Si in component B is usually 0.1 to 2.0,
Preferably, it is produced by mixing and curing the A component and the B component so as to be in the range of 0.1 to 1.0.

The curing reaction in this case is usually performed using a catalyst. As the catalyst used herein, a platinum-based catalyst is preferable. Examples of the catalyst include finely pulverized elemental platinum, chloroplatinic acid, platinum oxide, a complex salt of platinum and olefin, platinum alcoholate, and chloroplatinic acid and vinylsiloxane acid. And complex salts thereof. Such a complex salt is used in an amount of usually 0.1 ppm or more, preferably 0.5 ppm or more, based on the total weight of the A component and the B component. The upper limit of the amount of such a catalyst is not particularly limited. For example, when the catalyst is in a liquid state or can be used as a solution, 200 pp
m or less is sufficient.

The above-mentioned component A, component B and the catalyst are mixed and left to stand at room temperature or cured by heating to form the silicone gel used in the present invention. The silicone gel thus obtained is JIS
The penetration measured by K (K-2207-198050 g load) is usually 5 to 250, and JIS-K222
The consistency defined as 0 is between 5 and 200. The hardness of such a silicone gel varies depending on the crosslinked structure formed by the above-mentioned component A and component B.

The viscosity of the silicone gel before the curing and the penetration after the curing are determined by using a silicone oil having methyl groups at both ends in 5 to 75% by weight based on the obtained silicone gel.
Can be adjusted by adding in advance in an amount within the range described above. As described above, the silicone gel can be adjusted as described above, or a commercially available silicone gel can be used.

As the foamed silicone gel obtained by making the silicone gel porous, sodium chloride is added as a foaming medium to the above silicone gel, the foam is cured in a foamed state, and sodium chloride is further dissolved in a solvent. A material formed in a porous shape by eluting the compound can be applied as an example.

Of course, the material used as the flexible foam sheet may be silicone rubber, millable silicone rubber, or other foams.
Excellent in push-in action), excellent in strength (can withstand repeated use), air permeability (does not form a defect due to residual air on the surface of microprojections), and excellent release properties (smooth deprinting is performed) Select and use.

Further, by deforming its own shape in this way, in addition to the projection-forming pressing body 15 that performs a pressing action,
As shown in FIG. 6A, the protrusion forming pressing body 15 in which the fixed pressing portion 17 is formed from the beginning may be used.
As shown in (b), for example, a bullet-shaped movable pressing piece 17A may be slidably fitted to a flat pressing body body. In addition, as shown in FIG. 6C, a bump-shaped elastic pressing portion 1 is
It is also possible to provide the protrusion-forming pressing body 15 having a configuration in which 6A is provided, and is elastically deformed downward by the elastic force at the time of pressurization, thereby performing a pressing action. FIG. 6 (d)
Is a device in which a space on the upper surface of the elastic base sheet 2 is sealed, a fluid such as air A is supplied into the space, and a pressure action is performed by increasing the pressure in the space. Thus, it is of course possible to employ the projection-forming pressing body 15 having such a configuration.

(Iv) Pressurization, heating, and plate-release (FIG. 9B)
(See (c).) Then, as shown in FIG. 9 (b), as an example, as shown in FIG. More appropriately, a pressure is applied by applying a weight W or the like to exert the pressing action of the protrusion forming pressing body 15 and, at the same time, heating from above and below to cure the uncured liquid raw material P, thereby forming a partial surface of the stretchable base sheet 2. Then, a resin 5 for forming minute projections is closely formed. By the way, the heating temperature at this time is about 70 ° C to one hundred and several tens ° C.
Since the temperature may be relatively low, there is no problem of deformation or discoloration of the stretchable base sheet 2. Also, the time required during this time due to pressurization and heating varies depending on the composition and amount of the liquid material P before curing, the curing state in the previous step, and the like.
It is about 15 minutes. Then, the pressurized and heated state is released as shown in FIG.
Is removed from the intaglio 10, a series of steps of the present manufacturing method using the intaglio 10 is completed.

(II) Manufacturing method in the case of using a stencil (see FIG. 10) (i) Placement of bottom stencil and stencil (see FIG. 10 (a)). Bottom plate 12 and a hole 11 having a predetermined shape
This is a step of placing the stencil 11 formed with a. Here, the configuration of the bottom stencil 12 and the stencil 11 used in the present manufacturing method and an example of a method of producing the stencil 11 will be described. Bottom plate 1
2 and stencil 11 are, for example, It is made of an iron plate having a thickness of about several mm to several mm. Among them, in the case of the stencil 11, the shape of the minute projections 3 to be further formed and the layout, that is, the concavo-convex pattern 4 are formed on the iron plate. Basically, it is basically formed by engraving a hole 11a of a predetermined shape in a pattern. In addition, the thickness of the bottom plate 12 and the stencil plate 11 is 0. It can be appropriately selected within a range of several mm to several mm. A plurality of thin plates having a thickness of several mm are prepared (after the stencil 11 is further covered with protective films on the front and back surfaces of these thin plates, respectively, and etched from both sides to form holes 11a in the respective thin plates). An adhesive capable of forming a hard adhesive layer, such as an epoxy-based adhesive, is applied between these thin plates, and the bottom plate 12 and the stencil 11 having a thickness of several mm can be formed by laminating these thin plates. It is.

On the other hand, the surface of the bottom stencil 12 on the side of adhesion with the stencil 11 may be one having a smooth mirror-like surface finish, but one having a matte finish, one having a rough finish on its surface, It is also possible to perform a concavo-convex treatment on a pattern formed by a method such as etching. By the way, when such a concavo-convex treatment is performed, it is possible to impart a design property to the end surface of the minute projection forming resin 5 in the minute projection 3 to be molded, Since a certain degree of air permeability is ensured between the holes 11a without using a separate air permeable sheet.
The air A can be discharged from the air, and no adverse effect is caused by the residual air A. Furthermore, such a bottom plate 12 and a stencil 11
It is preferable that a guide hole 13 is formed in the base plate. If such a guide hole 13 is provided, the bottom plate 12 and the stencil plate 11 can be placed at the correct positions by using the guide holes 13 or a plurality of When the stencil 11 is used, it can contribute to the prevention of displacement.

Another method of forming the hole 11a in the stencil 11 is disclosed in Japanese Patent Application No. Hei.
No. 7574, "Method of manufacturing embossed sheet", Japanese Patent Application No. Hei 4-
No. 343,146, "Method of manufacturing embossed sheet", a method using a master mold, a method using a photocurable resin film, a method using sandblasting, a metal plate, a resin plate, etc., wire cutting, laser, punching, Various methods can be employed, such as a method of forming the stencil 11 by forming the hole 11a by a method such as pressing. Further, when placing the stencil 11 thus prepared on the base B on which the bottom stencil 12 is placed,
It is necessary to improve the adhesion between the base B and the bottom stencil 12, the adhesion between the bottom stencil 12 and the stencil 11, and the adhesion between the stencils 11 when a plurality of stencils 11 are used in an overlapping manner. I will touch on this point a bit below.

Here, as one example, a method of bringing them into close contact using magnetic force will be described. In addition, as a method of making close contact using such a magnetic force, a base B
Two methods can be selected depending on whether the side has a magnetic force or the bottom plate 12 and the stencil 11 have a magnetic force. Here, a case in which a magnetic force is provided on the base B side which is most suitable for actual use will be described. In this case, the base B is constituted by, for example, an electromagnetic chuck which is widely used as a workpiece holding device of a surface grinding machine, and the bottom plate 1 adsorbed by the electromagnetic chuck is used.
The stencil 2 and the stencil 11 are made of a relatively thin iron plate having a thickness as described above. As the base B, a permanent magnet chuck, a permanent magnet, or the like that can be expected to have the same effect can be used.

Between the base B and the bottom plate 12, the bottom plate 12
As a method of contacting between the stencil 11 and the stencil 11, or between the stencil 11, in addition to the method of using such magnetic force, spraying mist-like water droplets between them and freezing them to adhere the stencil 11 to each other. In addition, a few drops of water or an adhesive solution for temporary bonding are dropped between them, and the two are superimposed on each other to achieve close contact, between the base B and the bottom plate 12, between the base plate 12 and the stencil plate. For example, by separately providing a mechanical engagement means between the stencils 11 or between the stencils 11,
Various adhesion means can be employed. When a plurality of stencils 11 are used, it is possible to carry a magnetic metal on the surface of the stencil 11 and thereby increase the magnetic force.

(Ii) Injection of liquid material before curing and squeegee treatment (see FIGS. 10 (a) and 10 (b)) Thereafter, the liquid material P before curing is injected in the same manner as in the above (I) manufacturing method using an intaglio. Squeegee processing is performed using the squeegee tool 14. When the stencil 11 is used, a plurality of stencils 11 can be used by being superimposed as shown in FIG. 5, and here, an operation procedure when using a plurality of stencils 11 is used. Will be described. (A) Molding of Surface-Side Microprojection Element First, the bottom plate 12 is placed on the base B, and the surface-side stencil 11B is placed thereon, and brought into close contact with the base B by the above-mentioned means such as magnetic force. Fix it. And the front side stencil 1
A predetermined amount of the liquid material P before curing is injected into the hole 11a of the squeegee 1B.
4 is used to remove the pre-curing liquid raw material P that protrudes from the upper surface of the hole 11a. The portion formed by the front side stencil 11B is the front side minute projection element 30.
B.

(B) Molding of base-side microprojection element Next, the base-side stencil 11A is placed on the front-side stencil 11B with the guide hole 13 serving as a guide, and the base B is fixed to the base B by the above-described means such as magnetic force. The bottom plate 12 and the front side stencil 11
B, and fix the base side stencil 11A in a tightly contacted state. Then, the pre-curing liquid raw material P having the same composition as the pre-curing liquid raw material P or a different composition is injected into the holes 11a of the base side stencil 11A. In this case, in the case of injecting the pre-curing liquid raw material P having a different composition from the pre-curing liquid raw material P, the pre-curing liquid raw material P is cured to some extent, Confirm that it has not been mixed before performing. When an excessive amount of the uncured liquid raw material P is injected below, a squeegee treatment is performed in the same manner as described above, and if necessary, left at room temperature until a semi-cured state is reached. The portion formed by the base side stencil 11A becomes a part of the base side minute projection element 30A. Also in this example, the injection needle 26 is used, and the diameter of the tip of the liquid material P before curing that is extruded from the injection needle 26 is smaller than the diameter of the hole 11a, and the tip is injected while maintaining a solid state. Of course, it may be done.

(Iii) Placement of the stretchable base sheet, pressing by the protrusion forming pressing body, pressurizing, heating, and plate release (FIG. 10C)
(Refer to (d).) Hereinafter, the stretchable base sheet 2 is placed in the same procedure as in the case of the above-mentioned (I) manufacturing method in the case of using an intaglio, and pressurization and heating are performed with the projection-forming pressing body 15 acting. Then, the fine protrusions 3 are formed on the surface of the stretchable base sheet 2, and then the pressurized and heated state is released to form the concavo-convex formed sheet 1 into a stencil
If it is taken out from No. 1, a series of steps of the present manufacturing method using the stencil 11 is completed.

(III) Manufacturing method when using a molded concave mold (see FIGS. 11 and 12) (1) When using two types of molded convex molds (see FIG. 11) (i) Fixing an elastic base sheet; Formation of forming guide recess (see FIGS. 11 (a) and (b)) The stretchable base sheet 2 is placed on the forming recess 18 in which the forming recess 18a of a predetermined shape is formed in a pattern in advance, and the peripheral edge thereof is formed. Is fixed to the concave mold 18. Next, FIG.
As shown in FIG. 1 (b), the primary molding convex 19 is acted on from above, and a part of the stretchable base sheet 2 is extended by the concave forming convex part 19a projecting downward to form the forming guide concave part 6. Form. In the case where the deformed state cannot be maintained only by the pressing action of the primary molding convex 19 and immediately returns to the original shape, pressing is performed while heating or the depression forming convex 19a is further heated. Appropriate measures can be taken, such as using a protruding material and shaping it to a state close to the shape of the minute projection to be formed. If the outflow of the uncured liquid raw material P from the mesh or the like of the stretchable base sheet 2 poses a problem, the surface of the stretchable base sheet 2 is appropriately coated.

(Ii) Injection, pressurization, heating, and release of the liquid material before curing (see FIGS. 11 (c), (d), and (e)) Next, the masking sheet 21 is appropriately covered on the upper surface of the stretchable base sheet 2. Thus, the liquid material P before curing is injected into the formation guide recess 6, and when it is in a semi-cured state, the secondary molding convex 20 is acted on from above, so that the projection forming projection protruding downward. The portion of the forming guide recess 6 is pressed downward by 20a, and the stretchable base sheet 2 in this portion is further extended. Then, while maintaining such a pressurized state, heating is performed to cure the uncured liquid raw material P to become the fine protrusion forming resin 5. When the fine protrusions 3 are formed on the stretchable base sheet 2, The pressure and heating are released, and the formed concavo-convex molded sheet 1 is released from the concave mold 18.

(2) When a single molded convex is used (see FIG. 12) (i) Fixing of the stretchable base sheet and pressing by the molded convex (see FIGS. 12 (a) and 12 (b)) The elastic base sheet 2 is placed on the base material 18 and, if necessary, as in the case of the production method (1), the liquid raw material P before curing is used.
Apply a coating to prevent spills. Then, 22 is acted on from the upper side by a molding convex, and the main body flat plate portion 2 of the molding convex 22 is formed.
The stretchable base sheet 2 is fixed by the sandwiching action between the mold 2a and the concave mold 18. Next, the protrusion forming protrusion 22b, which is fitted to the main body flat plate portion 22a and is slidable in the vertical direction and rotatable in the horizontal direction, is slid downward to expand the elastic base sheet 2 while pressing it. , Into the forming recess 18a of the forming recess 18. At this time, the molding recess 18
A space S for filling the uncured liquid raw material P to be filled from now on is secured between the bottom surface a and the end surface of the stretched stretchable base sheet 2.

(Ii) Injection of liquid material before curing, pressurization, heating, removal of residual resin, and release (FIGS. 12B, 12C, 12D)
(See (e).) Next, a liquid material P before curing is filled in a runner 23 provided so as to penetrate the projection forming convex portion 22b in the longitudinal direction, and the vicinity of the end surface of the elastic base sheet 2 is further increased by the extrusion pressure. The molding recess 1 is extended downward to form the molding recess 1 in the molding recess 18.
8a. When the liquid material P before curing is cured by heating while maintaining such a state, this portion becomes the microprojection forming resin 5. Thereafter, the protrusion forming protrusion 22b is rotated in the horizontal direction, and the residual resin 25 in the runner 23 and the minute protrusion forming resin 5 are separated by the cutting blade 24 at the tip thereof. Then, after the molded convex mold 22 is retreated upward, the molded concavo-convex molded sheet 1 is released from the molded concave mold 18.

[0065]

The structure of the concavo-convex molded sheet of the present invention and the method for producing the same are described in the embodiments described above.
It is realized as an example, and by having the invention specifying items embodied by these embodiments, various effects as described below are exhibited. That is, in the concavo-convex molded sheet 1 of the present invention, the minute projections 3 are constituted by a part of the stretchable base sheet 2 and the minute projection forming resin 5 made of a thermosetting resin or the like, and one of them is the other. Is formed so as to conform to the inner surface shape of the above, the joining area between them is increased, the joining state is strengthened, and the minute projections 3 hardly fall off. In addition, since the bonding state is strengthened, the height of the fine protrusions 3 can be increased, and the functionality of the fine protrusions 3 can be enhanced. In addition, since the fine protrusions 3 can be formed with a small amount of raw material, the uneven molded sheet can be formed. 1 can also contribute to weight reduction and product cost reduction.

On the other hand, in the method for producing a concavo-convex molded sheet of the present invention, only the projection-forming pressing body 15 is added.
The manufacturing technology of the present concavo-convex formed sheet by the present applicant can be utilized almost as it is, and the concavo-convex formed sheet having a desired shape and functionality can be manufactured. When the projection-forming pressing body 15 is formed of a soft foam sheet, a single projection-forming pressing body 15 can cope with the formation of the minute projections 3 and the uneven patterns 4 in various forms. An excellent effect is exhibited, and it is not necessary to pay particular attention to the positioning of the protrusion forming pressing body 15, so that it can contribute to improvement of manufacturing efficiency. Further, as the soft foam sheet,
When a foamed silicone gel obtained by making the silicone gel porous is used, it has appropriate elasticity, deformability, strength, and air permeability, so that the small concave portion 10a or the hole portion 11a is used.
Even if the air A smoothly enters to follow the inner surface shape, it exhibits a good pressing force, and the mixed air A
It also has the function of discharging the fine protrusions to the outside.
It is possible to eliminate a defective portion due to the residual air A on the surface and an inadvertent bleeding of the liquid material P before curing into the stretchable base sheet 2 due to the defective portion. Further, when a polyurethane elastomer (non-silicone-based elastomer) is used as the liquid material P before curing, the silicone-based soft foam sheet and the liquid material P before curing have a property that they are difficult to adhere to each other. Can withstand well.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an uneven molded sheet of the present invention.

FIG. 2 is a plan view and a longitudinal sectional side view showing the same top plan view and micro projections in an enlarged manner.

FIG. 3 is a longitudinal sectional side view showing various embodiments in which the shape or configuration of a minute projection is different.

FIG. 4 is a longitudinal sectional side view showing two types of injection methods of a liquid material before curing.

FIG. 5 is a vertical cross-sectional side view showing an operation state in the process of forming a multi-step minute projection.

FIG. 6 is a longitudinal sectional side view showing other various embodiments in which the configuration of the projection forming pressing body is different.

FIG. 7 is a perspective view showing a bottom stencil and a stencil used in the method for producing a concavo-convex molded sheet of the present invention.

FIG. 8 is an explanatory view showing step by step a series of steps of a method of manufacturing a concavo-convex molded sheet when an intaglio is used, and is a longitudinal side view showing steps from placement of the intaglio to squeegee treatment. .

FIG. 9 is a vertical sectional side view showing a process from placing of the stretchable base sheet to release of the plate.

FIG. 10 is an explanatory view showing step by step a series of steps of a method for manufacturing a concavo-convex molded sheet when a stencil is used.

FIG. 11 is an explanatory view showing a method of manufacturing a concavo-convex molded sheet in the case of using a molded concave mold, in which a series of steps in the case of using two types of molded convex molds are stepwise.

FIG. 12 is an explanatory view showing a method of manufacturing a concave-convex molded sheet in the case of using a molded concave mold, in which a series of steps in the case of using a single molded convex mold is stepwise.

FIG. 13 is a longitudinal sectional side view showing a state of injection of a liquid material before curing using an injection needle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concavo-convex molded sheet 2 Elastic base sheet 3 Micro projections 4 Concavo-convex pattern 5 Micro-protrusion forming resin 6 Forming guide recess 10 Intaglio 10a Depression 11 Stencil 11A Base stencil 11B Surface stencil 11a Hole 12 Bottom plate 13 Guide hole 14 Squeegee tool 15 Protrusion Forming Press Body 16 Deformation Pressing Section 16A Elastic Pressing Section 17 Fixed Pressing Section 17A Movable Pressing Top 18 Molding Recess 18a Mold Recess 19 Primary Forming Convex 19a Depression Forming Convex 20 Secondary Forming Convex 20a Projecting Forming Protrusion 21 Masking sheet 22 Molding projection 22a Main body flat plate portion 22b Projection forming projection 23 Runner 24 Cutting blade 25 Residual resin 26 Injection needle 27 Cylinder 30 Microprojection element 30A Base microprojection element 30B Surface microprojection element A Air B Base P Cure Pre-liquid raw material S Filling space W Weight

Claims (10)

(57) [Claims] 1. A sheet-like member formed by forming a plurality of fine projections on one surface of a stretchable base sheet to express a desired uneven pattern, wherein the fine protrusions are thermally cured with a part of the stretchable base sheet. is constituted by the minute projections forming resin consisting of sexual resin, Note and one of these is shall be close contact formed along the other of the inner surface shape,
This adhesion state is due to the fact that the uncured microprojection forming resin is
It can be cured while entangled with the fibers that make up the ground sheet.
And a concavo-convex molded sheet obtained by the method described above . 2. The micro-projections form a projection shape by a micro-projection forming resin arranged on the surface side, and a part of the stretchable base sheet enters along the inner surface shape of the micro-projection forming resin, 2. The uneven-shaped sheet according to claim 1, wherein the sheet is formed in close contact with the stretched state. 3. The micro projections are arranged on a surface side of the stretchable base sheet in a state where a part of the stretchable base sheet is stretched, and a part of the stretched stretchable base sheet has an inner shape of the stretchable base sheet. 2. The uneven-formed sheet according to claim 1, wherein a resin for forming minute projections, which forms the shape of the projections from the inside, is formed in close contact with the resin. 4. The uneven molded sheet according to claim 1, wherein the thermosetting resin or the like is a polyurethane elastomer. 5. A bottom plate is mounted on a base, and a stencil having predetermined holes formed in a pattern is mounted on the bottom plate, or a concave portion having a predetermined shape is previously formed on the base. Is placed, a predetermined amount of liquid material before curing is injected into these holes or recesses, and then a stretchable base sheet is placed thereon, and a projection forming press body is further pressed from above. Pressurizing and heating in a state where it is actuated, thereby forming a plurality of minute projections which express a desired uneven pattern on one surface of the stretchable base sheet. . 6. The projection-forming pressing body is formed of a soft foam sheet.
6. The uneven forming according to claim 5, wherein a part of the protrusion forming press body is deformed by the pressurization, and the deformed portion is formed by a pressing action by entering the hole or the concave portion. Sheet manufacturing method. 7. The method according to claim 5, wherein a squeegee process is performed after injecting a predetermined amount of the liquid material before curing, after injecting an excessive amount. 8. An injection needle is used to inject a predetermined amount of the liquid material before curing, and the diameter of the tip of the liquid material before curing extruded from the injection needle is smaller than the diameter of the hole or the concave portion. 6. The method according to claim 5, wherein the tip droplets are injected while maintaining a solid state. 9. The method according to claim 6, wherein a foamed silicone gel obtained by making a silicone gel porous is used as the soft foamed sheet. 10. A stretchable base sheet is fixed to a mold recess in which a mold recess of a predetermined shape is formed in a pattern in advance, and a primary mold convex is acted on from above to thereby form one of the stretchable base sheets. A forming guide recess is formed in the portion, and then a liquid material before curing is injected into the forming guide recess, and then pressurized and heated in a state where a secondary molding convex is acted from above, thereby expanding and contracting. A method for manufacturing a concavo-convex molded sheet, wherein a plurality of microprojections for expressing a desired concavo-convex pattern are formed on one surface of a base sheet.