JPH03269181A - Enamel-tone imitation leather sheet - Google Patents

Abstract

PURPOSE:To obtain the title sheet having enamel-tone gloss and color tone by laminating an orientated polyester film having specific physical properties through a colored layer to one side of a specific filler-containing plastic film and forming an uneven pattern on the surface of the film. CONSTITUTION:An orientated polyester film 2 having >=80% light transmittance and >=100 surface gloss degree is laminated through a colored layer 3 to at least one side of a drawn plastic film 1 containing 10-40wt.% filler (e.g. calcium carbonate), having formed voids 4 with the filler as a nucleus and <=1 apparent density, further optionally a flexible sheet is laminated to the other side of the plastic film, an uneven pattern is formed on the surface of the film to give an imitation leather sheet having enamel-tone gloss, improved wear resistance and stain resistance.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a fake leather sheet made of a plastic film, and more specifically, it has an enamel-like luster, and
The present invention relates to a fake leather sheet having a special uneven pattern that has an enamel-like glossy color and excellent resistance to fading, as well as excellent abrasion resistance and stain resistance.

[Prior art] The enamel-like fake leather sheets that have been proposed so far are made of textiles,
It is constructed by coating or impregnating a synthetic resin such as polyurethane or polyvinyl chloride containing a coloring agent on a base fabric such as a non-woven fabric, and then coating the surface with a glossy resin to give the surface gloss. . However, such a pseudo-leather sheet has the disadvantage that the synthetic resin layer on the surface is easily abraded and is easily discolored or destroyed by chemicals such as organic solvents. Another drawback was that the synthetic resin layer on the surface was easily contaminated, and the stain could not be easily removed.

Furthermore, it is impossible to form a simulated leather-like uneven pattern on the sheet surface at room temperature, and the embossing process must be performed under heated conditions. This causes a problem in that the glossy surface resin deteriorates, making it impossible for the surface resin to maintain its original surface gloss. Furthermore, conventional embossing produces only a certain uneven pattern, and a special uneven pattern of "-product (sheet, processed product) - looks" cannot be expected.

[Problem to be solved by the invention]

The object of the present invention is to solve the above-mentioned conventional problems, to have an enamel-like glossy color tone, and to have excellent fading resistance, abrasion resistance, and stain resistance of the enamel-like color tone, and to provide a product that can be used at room temperature. To provide a fake leather sheet having a special uneven pattern that can maintain a high level of surface gloss by forming an uneven pattern even when the surface is uneven.

[Means for solving the problem] The fake leather sheet of the present invention that achieves the above-mentioned characteristics has a
A stretched plastic film containing % filler by weight and an apparent specific gravity of 1.0 or less, and a light transmittance of 80% or more and a surface gloss of 100 or more, laminated on at least one side of the stretched plastic film with a colored layer interposed therebetween. The basic structure is that the stretched polyester film has a special uneven pattern that has not been seen in the past on its surface. Here, the special uneven pattern refers to a pattern based on non-uniform unevenness, such as a uniform uneven pattern such as that seen in materials embossed under heat near the melting point of the material, and embossed patterns. part(
Items in which there is a normal change in material gloss (recesses) are excluded. Such a special uneven pattern makes it possible to exhibit a unique look that is ``-product-look.''

The fake leather sheet of the present invention has such a basic configuration as follows:
The stretched polyester film laminated to the stretched plastic film may be provided on only one side, or may be provided on both sides. When a stretched polyester film is laminated on both sides, the colored layer interposed between the stretched plastic film and the stretched plastic film may be provided on at least one side.

Further, in the above basic configuration, when the stretched polyester film is laminated on the stretched plastic film on only one side, a flexible sheet may be laminated on the one side opposite to the stretched polyester film.

In the present invention, "light transmittance" refers to a value measured by the measurement method specified in Japanese Industrial Standard JIS K 7105, and "surface gloss" refers to the same value as <
Of the measurement methods specified in JIS Z 8741, it refers to the value measured by method 3 (60 degree specular gloss).

[For production]

The fake leather sheet according to the present invention has a colored layer with a light transmittance of 80%.
1.Since it is covered with a stretched polyester film with a surface gloss of 100 or more, the color of the colored layer can be clearly seen through the film layer with high light transmittance, and at the same time, the transparent color can be seen through the film layer with a high surface gloss. Through the film layer, the color tone can be changed to an enamel-like gloss.

Furthermore, since the colored layer is covered with a stretched polyester film, the colored layer hardly loses its color and has excellent abrasion resistance. Furthermore, even if the surface becomes dirty, it can be easily removed by wiping.

In addition, the inner stretched plastic film has a tensile strength of 10 to 40
Since it contains a filler of % by weight and has an apparent specific gravity of 1.0 or less, it becomes a state containing a large number of voids inside. When a stretched plastic film is subjected to mechanical wrinkling such as rolling along with the stretched polyester film on the surface layer side, some of the voids are crushed and permanent distortion occurs, and the stretched polyester film on the surface layer also has an uneven pattern. You will start adding more. The collapse of such voids creates an uneven pattern, which enables processing at room temperature.This allows the surface layer of the stretched polyester film to maintain its high gloss level of 100 or more, and to make the sheet even more layered. Creates a leather-like appearance. Furthermore, since the uneven pattern can be molded without applying heat, the uneven pattern can be easily formed during kneading and as a product, and a special look of "-product-look" can be obtained.

When a flexible sheet is laminated on the opposite side of the stretched plastic film to the stretched polyester film, such an uneven pattern on the surface layer can be created by varying the thickness of the flexible sheet, the fuzziness of the surface, etc. By selecting
Various patterns can be created, from small uneven patterns to large uneven patterns.

(Example) The present invention will be specifically described below with reference to the drawings.

FIG. 1 shows a cross section of a fake leather sheet S1 according to an embodiment of the present invention. In this Figure 1, ■ indicates a stretched plastic film, 2 indicates a light transmittance of 80% or more, 1 a surface gloss level of 100%,
In the above stretched polyester film, 3 is a colored layer that also serves as an adhesive layer between the stretched plastic film 1 and the stretched polyester film 2. Inside the stretched plastic film 1, voids 4 are formed with a large number of particulate fillers (not shown) as cores. When some of these voids 4 are crushed by mechanical wrinkle processing such as rolling or embossing, they create permanent distortion in the film with an uneven pattern, and this permanent distortion causes the stretched polyester film 2 on the surface layer to An uneven pattern is also formed on the surface.

As shown in FIG. 3, the fake leather sheet SI is a flat sheet 3.1 in which a stretched polyester film 2 is laminated on a stretched plastic film 1 with a colored layer 3 interposed therebetween. By mechanically wrinkling this sheet, the voids 4 in the stretched plastic film 1 are crushed and an uneven pattern as shown in FIG. 1 is formed.

In the example shown in FIG. 1, the stretched polyester film 2 is laminated on only one side, but it may be laminated on both sides as shown in FIG. In this case, the adhesive layer 3' that adheres the other stretched polyester film 2 may contain a coloring agent like the colored layer 3, but the coloring agent is not necessarily required.

FIG. 4 shows a fake leather sheet S3 according to another embodiment of the present invention.
It shows. This fake leather seat S.

1, a flexible sheet 5 made of woven fabric, non-woven fabric, etc. is laminated on the opposite side of the stretched polyester film 2 with an adhesive layer 3 interposed therebetween. This fake leather sheet S is made by mechanically wrinkling a flat sheet S as shown in FIG. An uneven pattern is formed on the surface of a polyester film 1.

In the present invention described above, any known polyester can be used as the polyester used for the stretched polyester film. For example, polyethylene terephthalate, polytetramethylene terephthalate, polyethylene-〇-oxybenzoate, poly-1,4-cyclohexylene dimethylene terephthalate, polyethylene-2
, 6-naphthalene dicarboxylate and the like. Of course, these may be homopolyesters or copolyesters. Examples of copolymerization components include diol components such as diethylene glycol, neopentyl glycol, and polyalkylene glycol, adipic acid, sebacic acid, isophthalic acid phthalate, and
, 6-naphthalene dicarboxylic acid, and 5-sodium sulfoisophthalic acid. Among these polyesters, polyethylene terephthalate is particularly suitable for the present invention.

Further, this stretched polyester film needs to have a light transmittance of 80% or more and a surface glossiness of 100 or more. By having such characteristics of high light transmittance and high surface gloss,
For the first time, the colored layer becomes transparent and exhibits an enamel-like glossy color tone.

A stretched polyester film having such properties is characterized by having a smooth surface. The method for producing such a polyester film is not particularly limited, but for example, there is a method in which a filler is not blended, or even if it is blended, a very small amount of polyester is formed into a single stretched film.

Next, the plastic used for the stretched plastic film is not particularly limited as long as it has film-forming properties. Examples include polyolefins such as polypropylene and polyethylene, polyesters, polyamides, and polyvinyl chloride.

This stretched plastic film must contain 10 to 40% by weight of particulate filler and be stretched until its apparent specific gravity is 1.0 or less. As the filler, both inorganic particles and organic particles can be used. Inorganic particles include calcium carbonate and magnesium carbonate.

Alumina, aluminum silicate, kaolin, kaolinite, talc, clay, diatomaceous earth, dolomite, titanium oxide,
Examples include magnesium oxide and zeolite. These inorganic particles may be used alone or in combination of two or more. Further, as the organic particles, particles having different compatibility with the resin composition of the stretched plastic film are preferable. For example, in the case of polyester, synthetic resin particles having good releasability from polyester can be used. Other examples include polyolefin resins such as polyethylene, polypropylene, polybutene, and polymethylpentene. These organic particles can also be used alone or in a mixture of two or more.

The amount of filler added to the stretched plastic film is 10 to 40% by weight, more preferably 15 to 3% by weight.
It is best to keep it in the range of 5%. The amount of filler added is 1
If it is less than 0% by weight, it will be difficult to form unevenness on the surface due to mechanical wrinkling such as rolling.
When the amount exceeds 0% by weight, the stretched film becomes brittle and tends to crack during stretching.

The stretching of the film may be uniaxial stretching only in the contraction direction, or biaxial stretching in the contraction direction and the transverse direction. The stretching ratio must be at least large enough to form voids with the filler as a core, and the void formation must cause the apparent specific gravity to be 1.0 or less.

The void content of the stretched plastic film having an apparent specific gravity of 1.0 or less is preferably in the range of 25 to 60% by volume, more preferably 30 to 55% by volume. With such a void content, mechanical wrinkling can further improve the formation of an uneven pattern by processing.

Here, the void content refers to the density of the film with voids. , where the density when the film is thermally compressed near its melting point to completely collapse the void portion is defined by the following equation. The density at this time is calculated from the weight and volume (thickness x area) of the film.

ρ The stretched plastic film containing voids may be a single film or a composite film. Further, the distribution of voids within the stretched plastic film does not necessarily have to be uniform in the thickness direction; rather, it is preferable that the distribution of voids be small near the surface of the film and more distributed inside. When a large number of voids are distributed on the surface of the stretched plastic film, the adhesiveness of the surface becomes insufficient, and therefore the film is likely to be peeled off from the stretched polyester film as the surface layer or the flexible sheet as the lower layer. In order to achieve both the prevention of peeling and the ability to form irregularities due to voids, it is more preferable to combine a thin film without voids on at least one side of the stretched plastic film containing voids.

FIG. 6 shows an example of such a stretched plastic film 1. A thin film 12 without voids is composited with the film II having voids 4 on the side on which the stretched polyester film is laminated. If the stretched plastic film 1 is laminated with a stretched polyester film 2 on one side, and another stretched polyester film 2 or flexible sheet 5 is laminated on the other side, as in the case of the fake leather sheet shown in FIG. 2 or 4, In case of stacking,
Thin film 1 with no voids on both sides of the film 11
It is better to combine 2.

Alternatively, as shown in FIG. 7, a void-free film 12 is composited on one side, but a void 41 is formed on the other side.
A composite film 13 having a low content of . Alternatively, as shown in FIG. 8, the film 13 having a small void content may be composited on both sides of the film 11.

Such a composite film can be obtained by coextruding a plastic to which a filler has been added and a plastic to which no or only a small amount of filler is added in a layered manner from an extruder and then stretching the plastic. Or,
The above-mentioned filler-added plastic and filler-free or small-filler plastic are each extruded into films from separate extruders and longitudinally stretched, and after this longitudinal stretching, both films are laminated and simultaneously stretched in the transverse direction. It can also be obtained by doing.

When laminating flexible sheets as in the embodiment shown in Fig. 4,
The flexible sheet includes 9 knitted fabrics made of 1 natural fiber, 9 synthetic fibers, and 9 man-made fibers.

Non-woven fabric or paper and these base fabrics impregnated with resin (
Synthetic leather (1) Artificial leather, impregnated paper, etc.) can be used, as well as plastic films, plastic foam sheets, etc.

The flexible sheet of the present invention can be used by appropriately selecting the thickness of the flexible sheet, the degree of fluffing, the softness, etc., and the uneven pattern of the fake leather sheet can be controlled in various ways. can. For example, the thicker the flexible sheet, the larger the uneven pattern, and the thinner the flexible sheet, the finer the uneven pattern. Furthermore, the more fluffy the flexible sheet is, the larger the uneven pattern can be made, and the more flexible the sheet, the finer the uneven pattern.

Further, by laminating flexible sheets, the excellent elasticity and good sewing characteristics of the flexible sheets can be imparted to the fake leather sheet. The thickness of this flexible sheet layer is preferably selected within the range of 20 μm to 5 mm, and may be appropriately determined depending on the intended use of the fake leather sheet.

There are no particular limitations on the mechanical wrinkling process used to create the uneven pattern, but in addition to the above-mentioned rolling and embossing processes,
Crepe processing, pleating processing, etc. can also be applied. Mechanical wrinkling of this uneven pattern can be performed at room temperature due to the presence of a stretched plastic film with a filler content of 10 to 40% by weight and an apparent specific gravity of 0.1 or less, and is not necessarily heated. There is no need to go down.

In order to facilitate such mechanical wrinkling by processing, the thickness of the stretched polyester film should be 1.0 times or less than the thickness of the stretched plastic film, more preferably 0.
．． The range is preferably 0.05 to 0.6 times, more preferably 0.1 to 0.3 times.

Further, the absolute thickness of the stretched polyester film is not particularly limited as long as it has the above relationship with respect to the stretched plastic film, but it is preferably 6 to 50 μm, more preferably 10 to 40 μm. . On the other hand, stretched plastic film is 30 to 150 μ-1
More preferably, the thickness is 60 to 120 μm.

The colored layer between the stretched plastic film and the stretched polyester film is preferably made of a mixture of a colorant and an adhesive, and also serves as an adhesive layer. Pigments or dyes may be used as coloring agents. In addition, the adhesive is not particularly limited, but in order to sufficiently apply the uneven distortion formed on the stretched plastic film to the stretched polyester film, it is necessary to select an adhesive that has good affinity for both films. is desirable. As such an adhesive, a synthetic resin type adhesive such as polyurethane type or acrylic type is preferable. More specifically, reactive or self-crosslinking acrylic ester adhesives, thermosetting urethane adhesives, epoxy adhesives, rubber adhesives, etc. can be mentioned.

111 (melt index, based on ASTM 1238) is 1.0 polypropylene containing 20% by weight of calcium carbonate with a particle size of 1.7 μm, which is melt-extruded to form a film, which is 3.5 times the length in the machine direction and 7 times in the width direction. Two-wheel stretching was carried out successively to .0 times, followed by heat setting, to obtain a stretched film with a void ratio of 32% and a thickness of 80 μm. This stretched film was subjected to gravure printing with AP Ace Red manufactured by Dainichiseika Chemical Industry Co., Ltd.

The surface color tone is DCA...M (70) O (60) B
(30) (Based on Designer's Color Atlas published by Shogakukan (published in 1989)) It was red.

The printed surface of this printed stretched film has a light transmittance of 89%.
1 25μ polyester film with a surface gloss of 139 (
"Lumirror" T2O manufactured by Azuma Shimai) was used with a polyurethane adhesive (Seiryoku Bond E 260/C26 manufactured by Dainichiseika Kagyo Co., Ltd.).
). T/R7 on the non-printing side of this laminated film
050 (70 Tetrons.

A fabric consisting of 50 pieces of rayon) was adhered and laminated using a polyurethane adhesive (Seikabond E 260/C26).

The thus obtained laminated sheet was wrinkled using a clamping machine manufactured by Yamasa Giken ■ at room temperature and 0.5 m/min. As a result, the surface has an uneven pattern (not the same pattern) with uneven wrinkles, and the surface color tone is DC.
A red pseudo-leather-like appearance of A...M (70) O (60) B (30) was obtained. In addition, this wrinkled laminated sheet was easily re-wrinkled by hand kneading, and the uneven pattern was further changed.

Furthermore, when this laminated sheet was made into a small bag,
A product with a wrinkle pattern on the surface and a changed surface appearance was obtained.

〔Effect of the invention〕

As mentioned above, the fake leather sheet of the present invention has a surface layer made of a stretched polyester film with a light transmittance of 80% or more and a surface gloss of 100 or more, and this surface layer covers the colored layer, so the colored layer To make the color transparent and give it an enamel-like glossy tone. Moreover, this enamel-like glossy color tone can be made to look like layered leather by the surface unevenness pattern brought about by the stretched plastic film containing 10 to 40% by weight of filler and having an apparent specific gravity of 1.0 or less. can. Furthermore, since the surface layer is covered with a stretched polyester film, the enamel-like glossy color does not fade, and it can also be made to have excellent abrasion resistance and stain resistance.

In addition, by laminating stretched plastic films containing the above filler and having an apparent specific gravity of 1.0 or less,
Since the uneven pattern can be processed even at room temperature, the stretched polyester film on the surface layer does not suffer from thermal deterioration, and its high surface gloss can be maintained. Furthermore, conventional embossing, rolling (hand and machine), etc.
You can also get a special uneven look of "looks".

[Brief explanation of drawings]

FIG. 1 is a schematic longitudinal cross-sectional view showing a part of a fake leather sheet according to an embodiment of the present invention, and FIG. 2 is a schematic longitudinal cross-sectional view showing a part of a fake leather sheet according to another embodiment of the present invention. , Figure 3 is the first
FIG. 4 is a schematic vertical cross-sectional view of the simulated leather sheet showing the state before being mechanically wrinkled; FIG. Figure 5 is a schematic vertical cross-sectional view of the fake leather sheet shown in Figure 4 before being mechanically wrinkled, and Figures 6 to 8 are used for the fake leather sheet of the present invention, respectively. FIG. 2 is a schematic vertical cross-sectional view showing a part of a stretched plastic film. DESCRIPTION OF SYMBOLS 1... Stretched plastic film, 2... Stretched polyester film, 3... Colored layer, 4... Void, 5... Flexible sheet.

Claims (1)

[Claims] 1. A stretched plastic film containing 10 to 40% by weight of filler and having an apparent specific gravity of 1.0 or less, and a light transmittance layer laminated on at least one side of the stretched plastic film with a colored layer interposed therebetween. An enamel-like pseudo-leather sheet comprising a stretched polyester film having a surface gloss of 80% or more and a surface gloss of 100 or more, and having an uneven pattern formed on the surface of the stretched polyester film. 2. A stretched plastic film containing 10 to 40% by weight of filler and an apparent specific gravity of 1.0 or less, and a surface with a light transmittance of 80% or more and laminated on one side of the stretched plastic film with a colored layer interposed therebetween. An enamel-like faux leather sheet comprising a stretched polyester film with a gloss level of 100 or more and a flexible sheet laminated on the other side of the stretched plastic film, the stretched polyester film having an uneven pattern formed on its surface.