JPH0653263B2 - Manufacturing method for hard cosmetics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Purpose of the Invention" (Field of Industrial Application) The present invention relates to a method for producing a cosmetic material such as a wall material or a furniture material in which aesthetic appearance is particularly important. The present invention relates to a novel production method which enables the surface of the obtained decorative material to be smooth and hard like a mirror surface.

(Prior Art) FIG. 5 is a partially cutaway perspective view showing the decorative plywood 1 enlarged in the thickness direction. The decorative plywood 1 has a veneered plywood as a base material 2 and a surface sheet material 3 attached to the surface thereof.
A thin resin coating layer 4 was formed on the surface of the surface sheet material 3. As the above-mentioned surface sheet material 3, printing paper was used as the most general-purpose one, but in addition to the printing paper, cloth, decorative board, veneer, etc. were sometimes used.

(Problems to be Solved by the Invention) It is well known that the surface of the veneer plywood, which is the material of the base material 2, has a rough uneven surface along the fiber lines. However, the surface sheet material 3 and the resin coating layer 4 formed on the surface of the base material 2 had a thickness of less than 1 mm in total. Therefore, in the conventional decorative plywood 1, the fibers of the veneer plywood are reflected on the surface of the resin coating layer 4 to form fine wavy unevenness, and the luster gives off a blurry feeling as a whole. It was Further, in the conventional decorative plywood 1, when a hardness test is performed on the surface of the resin coating layer 4 using a pencil, H to 3H in the direction of the recess parallel to the fibers (arrow X direction). Although it had a surface hardness comparable to the core hardness of a certain degree, it crosses the convex portion at right angles to this (arrow Y
It was known that even with a soft pencil of HB to B, the scratches would be easily scratched.

By the way, the present inventor has been involved in the technical development in which a hard resin formed by copolymerizing an unsaturated polyester resin and an acrylic resin is applied as a material resin for forming the resin coating layer 4. As a result, they succeeded in increasing the surface hardness of the resin coating layer 4, and therefore applied for a patent for its manufacturing method and the like with a joint developer (Japanese Patent Application No. 63-197376).
issue). According to this method, the surface hardness of the resin coating layer 4 is
The core hardness was greatly increased to over 3H over the entire surface. Further, since the layer thickness of the resin coating layer 4 can be increased, the surface of the resin coating layer 4 can be made considerably smooth. However, in the manufacturing process of the decorative plywood 1, the adhesive for adhering the surface sheet material 3 to the surface of the base material 2 partially penetrates into the base material 2 during the curing period. Since shrinkage hardening occurs in the thickness direction (this may be called "sleeping" in the art), it was impossible to smooth the surface of the surface sheet material 3 itself to a mirror surface. In addition, the hard resin used as the material for forming the resin coating layer 4 takes time and effort for defoaming treatment at the time of curing, and the material cost is very high, so that the manufacturing cost of the entire product increases. There was a new problem.

The present invention has been made in view of the above circumstances, and the surface layer (for example, a resin coating layer) that is the most surface side has a mirror-like smooth surface texture and is satisfactory in its surface hardness. It is an object of the present invention to provide a novel method for producing a hard cosmetic material (hereinafter referred to as the method of the present invention), which can produce a cosmetic material, can be easily manufactured and can be manufactured at a low cost. .

"Structure of the Invention" (Means for Solving the Problems) The gist of the method of the present invention is that a surface sheet material is attached to the surface of a base material, and an adhesive reinforcing layer is formed on the surface of the surface sheet material. In a method for producing a cosmetic material having a surface makeup by forming a surface layer consisting of a single layer or a plurality of coating layers, resin coating layers, etc., at least one of the layers forming the surface layer. After mixing metallic powder such as stainless steel having a particle diameter of 50 μm or less or inorganic powder such as glass in an amount of 10% by weight or less with respect to the material resin, the material resin of one layer is mixed with the material resin of one layer. The point is to apply it to the surface of the surface sheet material, smooth the outer surface, and then cure it.

(Operation) Metal-based or inorganic-based powder mixed in the surface layer such as the adhesive reinforcing layer, the paint layer, the resin coating layer, etc. Flatten the rough surface of the base material that is even visible on the sheet material. Moreover, since the powder does not penetrate or shrink into the surface sheet material, after applying the material resin to the surface of the surface sheet material, if the outer surface is once smoothed,
The surface texture is kept mirror-like. Further, since the surface layer will be reinforced by the mixed powder,
The surface hardness of the entire cosmetic material is also satisfactory over the entire surface.

(Example) The following will describe the present invention with reference to the drawings illustrating an example thereof.

FIG. 1 is a partial front sectional view showing a cosmetic material manufactured by the method of the present invention in an enlarged manner in its thickness direction. The cross-sectional structure of the decorative material is such that the adhesive layer 5 is formed on the surface of the base material 2.
Further, the surface sheet material 3 is formed, and a resin coating layer 4 as a surface layer is provided on the surface of the surface sheet material 3.

The most different point of the decorative material from the conventional decorative plywood 1 (see FIG. 5) is that the resin coating layer 4 is mixed with a metallic or inorganic powder 6. Part of the powder 6 is applied to the surface sheet material 3 to be sunk in the fiber-corresponding concave portions of the base material 2 to flatten the same, and to the material resin for forming the resin coating layer 4,
It acts to slow down the fluidity during hardening and curing, and to suppress the shrinkage (sleeping) of the wall thickness due to hardening. Therefore, when the powder-containing material resin is applied to the surface of the surface sheet material 3, mutual movement of the material resin is prevented between the concave portions and the convex portions corresponding to the fiber stitches of the base material 2 appearing on the surface. Become so. That is, the outer surface of the raw material resin is smoothed so that the irregularities on the outer surface of the raw material resin formed by the concave portions and the convex portions of the surface sheet material are once leveled, and then this is cured to maintain the state. It is considered that the surface properties of the resin coating layer 4 are mirror-finished.

The material resin for the resin coating layer 4 is a urethane resin,
A polyester resin (typically, there is a trade name: X8529 ME901 manufactured by Mitsui Toatsu Chemical Co., Ltd.) can be used.

When the powder 6 mixed in the material resin is metallic, it is preferable that the powder 6 is manufactured from stainless steel, aluminum or the like. When the powder 6 is an inorganic material, it is preferable to pulverize a material having a non-water-absorbing property or a low water-absorbing property, such as mica or glass. In either case,
The particle size of the powder 6 needs to be 50 μm or less, and if it is coarser than this, the surface properties of the resin coating layer 4 may be rather deteriorated. Further, the mixing ratio of the powder 6 to the material resin needs to be suppressed to 10 wt% or less of the material resin equivalent amount, and if it exceeds this mixing amount, the compatibility between the material resin and the surface sheet material 3 may be deteriorated. . It goes without saying that the powder 6 is mixed in before the work of applying the material resin to the surface sheet material 3.

The veneered plywood used as the base material 2 is not limited in its thickness and the number of laminated layers. Further, even materials other than veneer plywood can be replaced with, for example, wood board, non-combustible board, flash material, synthetic resin, metal, woven cloth, non-woven cloth, paper, solid wood and the like. As the surface sheet material 3, as described above, printing paper (patterned paper, colored paper, etc.) or plain paper, as well as cloth, decorative board, single board, etc. are used. Further, as the adhesive layer 5 for adhering the surface sheet material 3 to the base material 2, an adhesive such as urea resin type, vinyl acetate resin type, polyester resin type or rubber type is suitable.

The present inventor measures the surface roughness of the resin coating layer 4 of the cosmetic material manufactured by the method of the present invention. Therefore, the mixing amount of the powder 6 with respect to the material resin and the particle size of the powder 6 are different from A to D. The following four specimens were prepared for manufacturing. Each sample A ~
D: Veneer plywood is used as the base material 2, urea resin-based adhesive is used as the adhesive for the adhesive layer 5, powder made of stainless steel is used as the powder 6, and colored paper is used as the surface sheet material 3. The above X8529 ME901 was used as the material resin for the resin coating layer 4. The base material 2 has a plate thickness of 2.5 mm, the adhesive layer 5 has a layer thickness of 7 to 8 g per 30 cm square, and the surface sheet material 3 has a thickness of 60.
To 80 g / m ^2, thickness of the resin coating layer 4 was 0.1 mm. The specifications of the powder 6 in each of the samples A to D are shown in the following table.

As is clear from the above table, the sample D is essentially the same as the conventional decorative plywood 1 because the adhesive does not contain powder. Therefore, by comparing this sample D with the other samples A, B, and C, the effect of the method of the present invention should be obvious. 2 (a) to (c) are enlarged views showing the cross-sectional curves on the surface side of the cosmetic materials (samples A to C) manufactured by the method of the present invention. ) Is an enlarged view of a cross-sectional curve on the surface side of a conventional decorative plywood (sample D). The standard length of each section curve (extracted length to be measured) is 2.
It is 5 mm. Based on these drawings, the surface roughness of the resin coating layer 4 was measured in accordance with JIS B 0601, and the results are shown below. It should be noted that, in each of FIG. 2, each of the cross-section curves has a concave curve as a whole, which indicates that the sample is bent due to the surface pressure of the probe, It does not reflect the surface shape of the sample. Moreover, the measurement was performed at room temperature of 20 ° C., and a shape roughness measuring instrument SEF-3FK manufactured by Kosaka Laboratory was used as a measuring instrument. As a result, the center line average roughness (Ra) of the samples A to C
Was 0.3 μm in each case. In addition, the maximum height (Rmax) from the valley bottom to the peak of the section curve is 0 for sample A.
2 μm, B was 2.0 μm, and C was 1.4 μm. On the other hand, the sample D, which is a conventional decorative plywood, has a center line average roughness (Ra) of 0.5 μm and a maximum height (Rmax) of 2.6 μm. To describe these surface roughnesses more easily, the sample A according to the method of the present invention was used.
In C to C, when the face is projected on the surface of the resin coating layer 4, even the individual hairs can be clearly counted and the surface texture is indicated. On the other hand, in the conventional sample D, the surface texture is blurred due to the background of the base material 2, and the faces and the like reflected in the surface are vague, and the hair is completely visible. It means nothing.

On the other hand, in the cosmetic material produced by the method of the present invention,
The surface hardness was also measured, and the measurement results are shown below. Generally, in order to measure the surface hardness of a cosmetic material, a so-called “hardness test for examining the hardness of a coating film”, which is specified for coating, has been performed. In this hardness test, draw a line on the coating to be tested sequentially with a black pencil for drawing from 6B to 9H, and it is the hardest pencil among the pencils with a line drawn without scratching the coating. The pencil hardness was the hardness of the coating film. The above-mentioned conventional decorative plywood 1
In FIG. 5 (see FIG. 5), the numerical values listed for the surface hardness are also measured based on this test method. However, in this hardness test, the tester held the pencil directly in his hand to draw a line, so the writing pressure, the inclination of the pencil, the speed of the line drawing, etc., often include variations and individual differences between tests. However, I cannot help saying that the comparison between the DUTs lacked rigor. Therefore, in the present invention, the surface hardness of the decorative material can be accurately measured by using the tester as shown in FIG. In the testing machine, the work bed 10 is moved in the horizontal direction by rotating the handle 9, and a clamp 8 for holding the cosmetic material sample 7 is attached to the upper surface of the work bed 10. There is. Further, the pencil 11 can be held with respect to the sample 7 in a direction inclined by 45 ° from the horizontal direction. Then, the pencil 11 is attached to the weight through the saucer 12.
It is possible to add 13 loads. In this test, the weight 13 used was 1.0 ± 0.05 kg. As the sample 7, the samples A to D used for the surface roughness measurement were sequentially replaced, and the work bed 10 was moved 3 mm at a speed of 0.5 mm / s for each sample. The criterion for this hardness test was whether or not scratches or dents were visually observed. As a result, the samples A to
In C, scratches were observed when the pencil was H, and scratches were observed when the pencil was H, so it can be said that the surface hardness is between H and 2H. On the contrary,
In the case of the conventional sample D, the scratch was already formed on the HB pencil, and the surface hardness was only B.
As described above, the data obtained by this hardness test is relatively inferior in appearance value to the data obtained by the conventional hardness test. 1 kg of load is applied (generally, the writing pressure when drawing with a pencil in your hand is 100-2
It is around 00g).

In addition, as an additional matter, the metallic or inorganic powder used in the method of the present invention has an illusion that it is similar to the filling effect of the abrasive powder normally used in woodworking when viewed in operation. However, according to the experiment of the present invention, even if the abrasive powder was mixed into the material resin of the resin coating layer 4, the expected result was not obtained. This is because the abrasive powder does not have the effect of blunting the fluidity of the material resin, and the abrasive powder swells by absorbing liquid in the material resin in the fluid state, and the surface sheet material during the curing period. It is presumed that there is a material that permeates into 3 and a material that swelled once contracts.

(Study of Another Mode) As shown in FIG. 4, a buffer layer 14 made of paper, woven cloth, non-woven cloth or the like may be formed between the surface sheet material 3 and the resin coating layer 4. In this case, the metal-based or inorganic-based powder 6 is also mixed into the adhesive reinforcing layer 15 formed between the buffer layer 14 and the surface sheet material 3 to further increase the surface roughness of the resin coating layer 4. It can be made small and the surface hardness can be formed to a hardness of 2H or more. In this case, it is of course possible not to mix the powder 6 into the resin coating layer 4. The buffer layer 14 may be doubled or tripled when the degree of roughness on the surface of the base material 1 is large, or when it is desired to hide natural patterns, stains, stains, scratches, and the like. Furthermore, in the case where a plain paper is used as the surface sheet material 3 and a coating material is applied to the surface thereof, a metallic or inorganic powder can be mixed into the coating material, and in that case, a coating film The surface can also be smoothed to a mirror-like state. As the powder to be mixed in the paint, crushed powder such as pearls, shells and laths can be used. If the resin coating layer 4 is formed on the coated surface, natural powder and lamp light can be prevented. It gives off a metallic luster and is very aesthetic. By the way, the resin coating layer 4 is prepared by mixing a curing agent prior to application to the surface sheet material 3 or the like. If the mixing time of the curing agent is immediately before application, the surface hardness after curing is increased. Has been found to be high. That is, when measured by the curing test as described above, the judgments of the test samples A to C were increased to 2H or more, and the surface properties were also observed in the impact test of dropping the 500 g of the hammer core from a height of 30 cm. No effect was seen on. As described above, the detailed configuration of the method of the present invention can be appropriately changed according to the embodiment.

"Effect of the invention" As is clear from the above description, according to the method for manufacturing a hard cosmetic material according to the present invention, the surface layer which is the most surface side (for example,
As for the surface of the resin coating layer), a smooth surface close to a mirror surface was obtained, and the surface hardness could be sufficiently satisfied over the entire surface. Therefore, the cosmetic material produced by the method of the present invention can be used as a top plate of a desk or a table with confidence. Further, in the method of the present invention, since a very simple operation of mixing a predetermined powder into a material resin for forming various surface layers is sufficient, there is no fear of being complicated in work, and the manufacturing cost also rises. It has a number of excellent advantages such as prevention of oxidization.

[Brief description of drawings]

FIG. 1 is a partial front sectional view showing the hard cosmetic material manufactured by the method of the present invention in an enlarged manner in the thickness direction thereof, and FIGS. FIG. 3 is an enlarged view of a sectional curve of a sample, FIG. 3 is a side view showing a testing machine used for a surface hardness test, and FIG. 4 is a partial front view showing another embodiment of a cosmetic material produced by the method of the present invention. FIG. 5 is a partially cutaway perspective view showing a conventional decorative plywood in an enlarged manner in its thickness direction. 1 …… Conventional decorative plywood 2 …… Basic material 3 …… Surface sheet material 4 …… Resin coating layer 5 …… Adhesive layer 6 …… Powder

Claims (1)

[Claims] 1. A surface sheet material is attached to the surface of a base material,
A method for producing a cosmetic material having a surface makeup by forming a surface layer composed of a single or a plurality of an adhesive reinforcing layer, a paint layer, a resin coating layer, etc. on the surface of the surface sheet material, As a material resin for at least one of the layers forming the surface layer, a metal-based powder such as stainless steel having a particle diameter of 50 μm or less or an inorganic powder such as glass is used in an amount of 10% by weight based on the material resin. A method for producing a hard cosmetic material, which comprises mixing in the following range, applying the material resin to the surface of a surface sheet material, smoothing the outer surface, and then curing the resin.