JPS6032997Y2 - Composite with embossed pattern - Google Patents

Description

[Detailed description of the invention] This invention is a mold release material and pattern forming material with excellent pressure resistance, which is used when giving an uneven embossed pattern to the surface of glass fiber-reinforced synthetic resin boards, generally called FRP. The present invention relates to an improvement of a composite material with an embossed pattern that can be used for various purposes such as wall materials having an embossed pattern and elasticity.

Conventional embossed patterned films or embossing techniques are used to modify the surface of the film (e.g. change in adhesion or coefficient of friction due to increased surface area or decreased contact area) or to improve the surface area of decorative plates with release performance. Research has been progressing as an applied technology to stencil printing.

Therefore, up until now, the most important thing technologically has been the surface condition (embossed form) of the film itself under no load.
For example, JP-A-52-23161, JP-A-52-220
No. 75, JP-A-52-22054, JP-A-52-21
70 to 120 as seen in each example of Publication No. 087
Emphasis has been placed on improving the heat resistance of the embossed form itself, such as improving the retention rate of the embossed form when left unloaded for two moments in hot air at ℃.

However, recently, embossed patterned films have been used as a release material and pattern forming material (paper pattern that also serves as a release paper) used to impart uneven embossed patterns to the surface of glass fiber-reinforced synthetic resin plates. When subjected to severe pressure such as degassing the surface fluidized layer of a resin layer reinforced with glass fiber etc. by applying linear pressure with a doctor knife through an embossed patterned film, or as a wall material (paper pattern). When the adhesive is subjected to a considerable compressive force during adhesion, such as during use, the embossed form is damaged, and other problems have arisen that cannot be addressed by conventional techniques.

Furthermore, in conventional films with embossed patterns,
Not only is the embossability insufficient and a desirable embossed form cannot be obtained, but fine wrinkles and heat blurring occur on the embossed surface, resulting in an uneven surface that lacks gloss and smoothness. When used as a forming material, depending on the form of embossing, problems may occur such as increased shear peeling and cutting of the film when peeling the glass fiber reinforced synthetic resin plate and the embossed patterned film surface. In the production of embossed patterns, even if the embossed form occurs once during embossing, there are defects such as frequent defects (dents) during the process until the product is finished, and conventional embossed patterned films are There are many deficiencies in the production management of industrial products, which require a strict guarantee of surface shape during use, and in the quality control of luxury products, where the product value is affected by subtle factors such as surface gloss. Ta.

In view of the current situation, the present invention considers each basic function separately and simultaneously satisfies and integrates these two inseparable requirements, and combines paper with embossability and thermoplastic resin film. A thin pattern of polyolefin resin is extruded and laminated between the layers to form a three-layer composite, and by adding an embossed pattern to this, it not only has good embossability and a beautiful embossed form, but also has a smooth surface. Because of its excellent gloss and extremely good smoothness, it exhibits extremely good mold release properties when used as a mold release material and pattern molding material in pattern molding of glass fiber reinforced synthetic resin plates, etc. This invention has made it possible to provide a composite with an embossed pattern that can also exhibit sufficient shape retention against pressure, and the present invention will be described in detail below with reference to the drawings.

In the figure, 1 is paper with embossability, and industrial paper such as kraft paper, particularly paper with many entanglements obtained from coniferous trees, is preferable.

2 is a film made of polyamide such as nylon 6 or nylon 66, polyester such as polyethylene terephthalate, or thermoplastic resin such as polypropylene or polyvinyl alcohol, and is preferably a biaxially stretched film with particularly excellent properties. .

3 is a polyolefin resin layer such as polyethylene or polypropylene that is extruded in a molten state into a thin pattern between the embossable paper 1 that is the outer layer and the thermoplastic resin film 2 to form the inner layer. The paper 1 having embossability and the thermoplastic resin 2 are not merely adhered to each other, but are also integrally bonded together with these two layers, and have a significant effect on various performances after the embossing is formed, thereby achieving excellent effects in the present invention. It plays an important role.

The thickness of the polyolefin resin layer 3 is preferably about 20 to 40 microns.

The embossed patterned composite according to the present invention is a three-layered composite consisting of the embossed paper 1, the thermoplastic resin film 2, and the polyolefin resin layer 3 under optimal conditions depending on the material used and the application. Various forms of embossed patterns can be applied by embossing.

The above-mentioned three-layer composite is particularly effective when using a thermoplastic resin film made of a resin other than polyolefin resin, since all three different layers of materials are combined into one, resulting in excellent embossed patterns. Not only does it exhibit excellent embossability, excellent embossed form retention, gloss and mold release properties after the embossed pattern has been applied, but it also has excellent orientation properties and related properties when using a biaxially stretched film as a thermoplastic resin film. The three layers of materials, all of which have different properties, are combined together to provide excellent embossability when an embossed pattern is applied, excellent embossed form retention, glossiness, and mold release properties after the embossed pattern is applied.

Next, the present invention will be explained in more detail with reference to Examples.

Example 1 Biaxially stretched nylon film with a thickness of 25μ (nylon 6 film 0N-25 manufactured by Uniti Chikara Co., Ltd.) and 509/rr
A laminate composite (thickness:
This was fed to a pair of embossing rolls consisting of a metal roll and a paper roll with a depth of 0.9 m and a rough diamond-cut pattern of 120 (Xil/100 cr) and a 20 kg/cm embossing roll. Line pressure and 120'
Embossed at a temperature of C, with an apparent thickness of 70 mm.
A composite with a 0μ embossed pattern was obtained.

Next, in order to evaluate the obtained composite with an embossed pattern, a release paper (biaxially stretched nylon film 0N-25 with a thickness of 25μ) was spread on a glass plate prepared in advance, and a thermosetting (unsaturated Polyester) resin and glass fiber roving mats are alternately stacked to form a resin plate layer, and the above-mentioned embossed patterned composite is superimposed on top of the resin plate layer, and then a glass rod is used to remove the bubbles using a doctor for defoaming in the production process. A defoaming and pressurizing operation assuming a blade was added, and curing (thermal curing) of the two powders was performed at 90°C.

After complete curing, the top layer of the patterned composite was peeled off, and an embossed decorative board with excellent gloss and no scratches or defects was obtained with very low peeling force.

For comparison, a single biaxially stretched nylon 6 film (nylon 6 film 0N-25) with a thickness of 25 μm was embossed in the same manner as above, superimposed on the resin plate layer, cured, and peeled off. As a result of comparative evaluation, as shown in Table 1, a significant difference was observed compared to the former (embossed patterned composite).

The meanings (evaluation criteria) of the symbols in each column in the table are as shown in Table 2.

Example 2 A biaxially stretched polypropylene film with a thickness of 25 μm (1 Torefan-B manufactured by Toshi Co., Ltd.) was used as a thermoplastic resin film.
An embossed patterned composite was formed in exactly the same manner as in Example 1 except that OJ) was used, and Table 3 shows the results of evaluation and comparison in the same manner.

Note that the evaluation criteria are as shown in Table 2.

Example 3 An embossed patterned composite was formed in exactly the same manner as in Example 1, except that a 25μ thick polyethylene terephthalate film (1 Lumirror J manufactured by Toshi Co., Ltd.) was used as the thermoplastic resin film. Table 4 shows the results of evaluation and comparison in the same manner.

Note that the evaluation criteria are as shown in Table 2. Example 4 A polyvinyl alcohol film with a thickness of 25 μm (1 Embler J manufactured by Unitika Co., Ltd.) was used as a thermoplastic resin film.
) was used, except that the embossed patterned composite was molded in exactly the same manner as in Example 1, and evaluated and compared in the same manner. The results are shown in Table 5.

Note that the evaluation criteria are as shown in Table 2.

As is clear from the above description, the embossed patterned composite according to the present invention is made by extruding and laminating a polyolefin resin in the form of a thin film between paper having embossability and a thermoplastic resin film selected according to the intended use. It is a three-layer composite with an embossed pattern added to it.
Not only does it exhibit good embossing properties that allow you to obtain a beautiful embossed form during embossing, but it also exhibits excellent smoothness and gloss without causing fine wrinkles on the embossed surface.
It exhibits extremely good mold release properties when used as a mold release material and molding material in pattern molding of glass fiber-reinforced synthetic resin plates, etc., and can withstand various pressures during manufacturing and use in various applications. It also exhibits shape retention and has additional required properties such as heat resistance and adhesiveness, and has excellent industrial utility value.

[Brief explanation of the drawing]

The drawings show an example of a composite with an embossed pattern according to the present invention, and FIG. 1 is a cross-sectional view of the composite before embossing, and FIG. 2 is a cross-sectional view of the composite after embossing. 1...Paper with embossability, 2...
Thermoplastic resin film, 3... Polyolefin resin layer.

Claims (1)

[Scope of utility model registration request] A composite with an embossed pattern, characterized in that a three-layer composite is formed by extruding and laminating a polyolefin resin in a thin film between paper having embossability and a thermoplastic resin film, and an embossed pattern is added to the composite. .