JPS6038270B2 - Light diffuse reflection vapor deposited sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a light ray diffuse reflection film layer (matting layer) on one side of the largest substrate such as a plastic film or sheet, and more specifically, it relates to a method for forming a light ray diffused reflection film layer (matting layer) on one side of the largest substrate such as a plastic film or sheet. In the lamination method, the surface of the cooling roll used to cool and solidify the hot molten resin mixed with fine particles such as pigments, silicon oxide, and alkali salts attached to the surface of the base material is phased. The present invention relates to a method for continuously forming a diffusely reflective film layer (matted layer) of fine double phase surfaces on a surface of the present invention.

BACKGROUND ART Laminated paper has been put into practical use as a decoration or packaging material, in which a metal foil such as aluminum is formed on one side of a transparent plastic film and then affixed to one side of a paper sheet. In this case, while the surface is beautiful, the printing effect is excellent, and it is moisture-proof, waterproof, and airtight, the paper surface has a mirror finish, and the incident light is reflected only in a certain direction depending on the angle of incidence. However, this reflected light may directly enter the customer's eyes, or it may be too glaring, and it may be unsuitable as a decorative paper because it is easily scratched. This invention does not impair the insulation properties against gas, water vapor, and heat rays like the conventional packaging material to which metal foil is attached, and moreover, it produces diffused reflection that has an unprecedented white and beautiful shine that is unique to this invention. The object is to eliminate the above-mentioned drawbacks. The conventional method for forming a diffusely reflective film layer on one side of the largest substrate is, for example, by dissolving a resin mixed with fine particles in a solvent, applying a coat using a gravure coating method, a silk screen method, etc., and drying with heat to form a fine-grained layer. A diffusely reflective film layer was formed on the surface.

However, in these conventional methods, the resin solution tends to adhere to the plate cylinder, causing clogging of the plate cylinder and screen, making it impossible to obtain a uniform finely roughened surface.Furthermore, solvent remains on the product, and when processing the product, There are disadvantages in that they cause organic pollution to the surroundings when manufacturing or using the secondary products, and they cannot be realized with resins that do not dissolve in solvents.

In addition, the concentration of the resin dissolved in the solvent increases over time due to the dissipation of the solvent, making the concentration control extremely complicated and difficult, and there is a disadvantage that the resin dissolved in the solvent becomes more complicated and difficult to manage. . In addition, mechanical and physical methods such as sandblasting and embossing are also considered, but these methods require strict selection of the film material, and the film must be thicker than a certain level. There are drawbacks. Furthermore, there are other chemical methods such as etching, but these have the drawbacks that the selection of the film material is difficult and cleaning and drying after processing is difficult. Furthermore, synthetic resin films are generally weak and, when torn from a desired point, tend to run away in the tearing direction and wrinkle, making it difficult to cut.

In addition, synthetic resin films are generally stretched to improve their physical properties, and biaxially stretched films in particular undergo a stretching process to strengthen their stiffness.
Improvements in transparency, barrier properties, heat shrinkability, etc. have been made, and the biaxially stretched products are even more difficult to tear than the unstretched ones, and will tear at slightly rough edges. Even if it tears, the direction of tearing is not constant because it is stretched in both axes.

Especially the mechanical stability of polyester, polyolefin, etc.
Synthetic resin films with high dimensional stability cannot be cut by hand unless they are cut using a knife. This invention was made in order to eliminate all the various drawbacks of the above-mentioned conventional examples, and the first feature of this invention is that pigments and pigments are applied to the base surface of a plastic film or sheet by an extrusion lamination method. By laminating and applying a hot melt resin containing fine particles such as silicon oxide and alkali salts through a cooling roll with a finely textured surface,
A light ray characterized by forming a light ray diffuse reflection film layer having a fine double rough surface on a substrate orchid, and then forming a light ray diffuse reflection vapor deposited film having a fine double rough surface on the light ray diffuse reflection film layer. To provide a diffusely reflective Aoiku sheet.

The second feature of the present invention is that pigments, silicon oxide, alkali salts, etc. are applied to the surface of a stretching agent base of a plastic sheet or the like that has been stretched in advance by extrusion lamination. After forming a light ray-diffusing reflection film layer with a fine double-grained surface on the surface of the base material by laminating a hot melt resin containing fine particles through a cooling roll with a fine-grained surface, the light ray-diffusing reflection film is An object of the present invention is to provide a vapor-deposited sheet for diffusely reflecting light, which is characterized by forming a vapor-deposited film for diffusely reflecting light having a fine double rough surface on its layer surface.

Furthermore, a third feature of the present invention is that the first
Another object of the present invention is to provide, in addition to the second feature, a vapor-deposited sheet for diffusely reflecting light, which is made easy to tear by pasting paper on the non-deposited surface of the vapor-deposited sheet for diffusely reflecting light.

The present invention will be described in detail below with reference to the illustrated embodiments.

A in Figure 1 is a long base material such as a plastic film or sheet made of polypropylene or polyester, and the wall thickness is approximately 10 mm.
~70 French, so it is uniformly manufactured. Second
The figure shows an embodiment of the present invention, and 1 in the figure is a hopper, which is a heat-meltable resin containing ultrafine particles E such as pigments, silicon oxide, alkali salts, metal oxides such as titanium oxide, etc. It has a charging row a for pellets such as vinyl chloride and polyester.

2 heats and melts the resin pellet in an extruder, and
It is extruded and supplied to the die 3.

Then, a molten resin curtain portion 4 extruded from the long slit 3a of the T-die 3 in the form of a film with a constant thickness and a constant width is formed. On the other hand, the structure is such that the base material A drawn from the supply drum 5 on which the base material A shown in FIG. 1 is wound is wound onto the take-up drum 7 via the pressure roll 6 at a constant speed.

A cooling roll 8 having a very finely roughened surface is provided so as to be in rolling contact with the surface of the elongated base material A that is fed in close contact with the surface of the pressure roll 6 at a predetermined pressure.
Further, the molten resin curtain part 4 is evenly inserted between the surface of the base material A moving in the direction of the arrow at a predetermined speed on the surface of the pressure roll 6 and the cooling roll 8, so that the molten resin is mixed with the molten resin. The surface of the extremely fine target surface formed by the fine particles E is cooled and solidified according to the fine roughness of the cooling roll 8, and is further roughened to obtain a diffused reflection sheet 9 having a fine double roughened surface B.

Next, if a metal such as aluminum is deposited on the finely roughened surface B by a conventionally known vapor deposition means, a metal vapor deposited film with a uniform average thickness (400 to Z2000A) is formed as shown in FIG. A sheet product 9 according to the present invention is obtained in which a metal evaporated film C that reflects light rays is beautifully formed on a diffusely reflective surface formed by the fine double roughness surface B of the film or sheet. This sheet product 9 is a packaging decoration with finely-grained light diffused reflection that is unique to the present invention and which reflects incident light beautifully with a sparkling white feeling due to the double fine irregularities of the metal hollyhock film C.
A discharge recording medium etc. can be obtained. Further, as an embodiment of the second feature according to the present invention, in 2, the sheet A having the fine double rough surface B is stretched in the vertical and horizontal directions by a well-known means such as a tender method, and then the sheet A is stretched on the rough surface B. Since the metal was vapor-deposited,
Even with a thin wall, you can obtain a strong light diffused reflection sheet.

Furthermore, as a second embodiment of the third feature of the present invention, a non-vapor-deposited surface 9A of the light ray diffused reflection vapor-deposited sheet product 9 is provided.
Since the backing paper D is attached to the sheet by a well-known means such as adhesive, hot melt, or lamination, a light scattering reflection sheet that can be easily torn is obtained. In addition, in order to use this invention as a discharge recording medium, a plastic sheet A or a backing paper D is used.
The paper may be colored, or a colored layer may be formed between the sheet A and the paper D.

Note that the cooling roll 8 has an extremely fine roughened surface with an arcuate tip, and contains fine particles E of silicon oxide, alkali salts, etc.
If a substantially spherical one is used, it is possible to obtain a light ray diffuse reflection vapor deposited film C having a fine double rough surface with an arcuate tip as shown in FIG. 4b. As described above, according to the first embodiment of the present invention, pigments, silicon oxides, alkali salts, metal oxides, etc. are coated on the surface of a base material such as a plastic film or sheet by extrusion lamination. A light ray diffused reflection film layer with a fine double layered surface is formed on the surface of Motomura by laminating a hot melt resin containing fine particles through a cooling roll with a fine rough surface, and then the light ray diffused reflection film is Since the layer is formed with a light-diffusion-reflecting film having a fine double-sided cylindrical surface, no solvent is used, and clogging of the cooling roll does not occur, compared to the conventional solvent-dissolved resin method.

In addition, according to the present invention, the surface of the cooling roll during the conventional plastic sheet film forming process is only made finely rough and no solvent is used, so there is no waste of resources due to solvent dissipation and no organic pollution to the surrounding area.

Moreover, in this invention, it is possible to firmly form a double micro-assembled surface that reflects light diffusely by heating and melting the resin, so it can be realized even with a sea bream that does not dissolve in solvents.Furthermore, there is no need to control the concentration of the melted resin, and the melted resin can be controlled by a microcomputer or the like. It has new and useful effects industrially in that viscosity control and cooling roll temperature and rotation speed can be automated under optimal conditions, allowing uniform products to be produced in large quantities at low cost. Furthermore, compared to mechanical methods such as sandblasting and embossing, the present invention allows greater flexibility in selecting the material and thickness of the film, allowing the use of inexpensive films, resulting in great economic effects. Furthermore, compared to chemical methods such as etching, it is economical and has the effect of saving energy and resources since it does not require energy, water, chemicals, etc. for cleaning, drying, etc. In addition, according to an embodiment of the second feature of the present invention, pigments and silicon oxide, By laminating hot melt resin containing fine particles of alkali salts, metal oxides, etc. through a cooling roll with a finely roughened surface, a light ray diffused reflection film with a finely double roughened surface is created on the surface of the base material. After forming the layer, a vapor-deposited light-diffuse-reflecting film with a fine double rough surface was formed on the surface of the light-diffuse-reflecting film layer, so in addition to the above-mentioned effects, the synthetic resin film improved its physical properties and strengthened the stiffness of the sheet as a whole. , improved transparency, improved barrier properties, improved heat shrinkability, etc., and even if the cut is slightly rounded, it will not tear, but since it is stretched in both axes, the tearing direction will not be constant. It has the advantage that it is impossible to cut by hand unless it is cut using a knife. Furthermore, according to a third feature of the present invention, in addition to the first or second feature, paper is attached to the non-vaporized surface of the diffused light reflection vapor-deposited sheet, so that the sheet as a whole has a strong stiffness. Therefore, when the material is torn from a desired point, the material does not wrinkle in the direction of tearing, and the material can be easily torn from a desired point in a predetermined direction.

[Brief explanation of drawings]

The figures all show embodiments of this invention; Fig. 1 is an enlarged sectional view of Motomura, Fig. 2 is a configuration diagram showing an embodiment of this invention, and Fig. 3 is an example of a product according to this invention. FIG. 4a is a further enlarged sectional view of the one shown in FIG. 3, and FIG. 4b is an enlarged sectional view showing a modification. A...Long base material, B...Fine double rough surface, C...Diffuse reflection vapor deposited film, D...Haircut paper, E...・Ultrafine particles, 1...Hopper, l
a...Beretsu inlet, 2...Extruder,
3...T-die, 3a...slit, 4
...... Molten resin curtain section, 5... Supply drum, 6... Pressure roll, 7... Take-up drum, 8... Cooling roll, 9... Diffuse reflection sheet products. *, Figure 3, ticket 2, heron, figure 4 (French), figure 4, (cha)

Claims (1)

[Claims] 1. The surface of a base material such as a plastic film or sheet is coated with a hot melt resin containing fine particles of pigment, silicon oxide, metal oxide, alkaline earth salt, etc. by extrusion lamination. After forming a light ray diffuse reflection film layer with a fine double rough surface on the surface of the base material by laminating it through a cooling roll with a fine rough surface, a light ray diffuse reflection film layer with a fine double rough surface is formed on the said light ray diffuse reflection film layer. 1. A vapor-deposited sheet for diffusely reflecting light, characterized by forming a vapor-deposited film for diffusely reflecting light. 2. Heat-melted resin mixed with fine particles such as pigments, silicon oxide, alkaline earth salts, etc. is applied to the surface of a stretched base material such as a plastic sheet that has been stretched in advance using the extrusion lamination method. is laminated through a cooling roll with a finely roughened surface to form a light ray diffused reflection film layer with a finely double roughened surface on the surface of the base material, and then a light ray diffused reflection film layer with a finely double roughened surface is formed on the surface of the said light ray diffused reflection film layer. A vapor-deposited sheet for diffusely reflecting light rays, characterized in that a vapor-deposited film for diffusely reflecting light rays is formed on the surface thereof. 3. A vapor-deposited sheet for diffusely reflecting light rays as set forth in claim 1, which is formed by pasting paper on the non-vapor-deposited surface of the vapor-deposited surface for diffusely reflecting light rays. 4. A vapor-deposited sheet for diffusely reflecting light rays as set forth in claim 2, which is formed by pasting paper on the non-vapor-deposited surface of the vapor-deposited surface for diffusely reflecting light rays.