JPH03269180A - Imitation leather-like sheet - Google Patents

Abstract

PURPOSE:To obtain the title sheet having specific frosted 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 >=55% light transmittance and 5-50 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-like sheet having frosted glass and color tone, excellent fading resistance and improved wear resistance and stain resistance.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a pseudo-leather-like sheet made of a plastic film, and more specifically, it has a special matte gloss color tone and has excellent color fading resistance of the special color tone. The present invention also relates to a pseudo-leather-like sheet having a special uneven pattern with excellent wear resistance and stain resistance.

[Prior art]

The pseudo-leather-like sheets that have been proposed so far are woven fabrics.

It is constructed by coating or impregnating a base fabric such as a non-woven fabric with a synthetic resin such as polyurethane or polyvinyl chloride containing a coloring agent. However, the synthetic resin layer on the surface of the pseudo-leather-like sheet having such a structure is easily abraded and 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, in order to form a simulated leather-like uneven pattern on the surface of the sheet, it is impossible to do so at room temperature, and the embossing process must be performed under heated conditions. As a result, there were problems such as deterioration of the sheet material and staining. Furthermore, conventional embossing can only obtain a certain uneven pattern, and the special uneven pattern of "F-product (sheet t'+processed product)-looks" cannot be expected.

[Problems to be Solved by the Invention] The object of the present invention is to solve the above-mentioned conventional problems, and to provide a leather-like special matte luster color tone, and the special color tone has excellent color fading resistance. To provide a pseudo-leather-like sheet which also has excellent abrasion resistance and stain resistance and can form a special uneven pattern even at room temperature.

[Means for Solving the Problems] The simulated leather sheet of the present invention that achieves the above object has 410~
Stretched plastic film containing 40% weight by weight and having an apparent specific gravity of 1.0 or less, and a light transmittance of 55% or more, which is laminated on at least the lunar surface of the stretched plastic film via a colored layer.

The basic structure is a stretched polyester film having a surface gloss level of 5 to 50, and a special uneven pattern not seen in the past is formed on the surface of the drawn polyester film. Here, what is the special uneven pattern?
It refers to a pattern based on non-uniform unevenness, such as a uniform pattern of unevenness such as that seen in embossed materials with a knife that is heated near the melting point of the material, and embossed areas (concavities).
Excludes materials where the change in gloss is normal. “-Product-Looks” is created by this special uneven pattern.
You will be able to display a unique look such as.

In the pseudo-leather-like sheet of the present invention, in such a basic configuration, 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 addition, 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 level 1 is the same 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 pseudo-leather-like sheet according to the present invention has a colored layer with a light transmittance of 55
Since it is covered with a stretched polyester film with a surface gloss of 5 to 50, the color of the colored layer can be clearly seen through the film layer with high light transmittance, and at the same time, the color seen through the film can be seen through the surface gloss. The color tone can be changed to a faded color through a film layer with a low content, making it possible to create a special color tone that is more leather-like.

In addition, since the colored layer is covered with stretched polyester film J, there is almost no discoloration of the colored layer (
It also has excellent wear resistance. Furthermore, even if the surface becomes dirty, it can be easily removed by wiping.

In addition, the inner stretched plus-thick film is 10 to 40
Since it contains a large proportion of fluorine and has an apparent specific gravity of 1.0 or less, it becomes a state in which a large number of voids are contained inside. When the 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. Started stamping. This uneven pattern gives the seat an even more leather-like appearance. Furthermore, since a concave-convex pattern can be stamped without applying heat, the concave-convex pattern can be easily created by rolling and as a product, and a special concavo-convex look of "-Product-Looks J" can also 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 pseudo-leather-like sheet S according to an embodiment of the present invention. In this Figure 1, 1 is a stretched plastic film, 2 is a light transmittance of 55% or more, 1 is a surface gloss of 5 to
50 is a stretched polyester film, and 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.

The pseudo-leather-like sheet Sl before mechanical wrinkling is a flat sheet S, which is made by laminating a stretched polyester film 2 on a stretched plastic film 1 with a colored layer 3 interposed therebetween, as shown in FIG. 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 stamped.

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 pseudo-leather-like sea)S according to another embodiment of the present invention.
i is shown. This pseudo-leather-like sheet S3 is obtained by laminating a flexible sheet 5 such as a woven fabric 1 and a non-woven fabric on the opposite side of the stretched polyester film 2 with an adhesive layer 3 interposed on the sheet SI having the structure shown in FIG. It is. This pseudo-leather-like sheet S3 is produced by mechanically wrinkling a flat sheet S3'' 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-oxybenzoate, poly-1,4-cyclohexylene dimethylene terephthalate, polyethylene-2,
Examples include 6-naphthalene dicarboxylate. 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, phthalic acid.

Isophthalic acid, 2,6-naphthalene dicarboxylic acid, 5-
Examples include dicarboxylic acid components such as sodium sulfoisophthalate. Among these polyesters, polyethylene terephthalate is particularly suitable for the present invention.

Moreover, this stretched polyester film needs to have a light transmittance of 55% or more and a surface glossiness of 5 to 50. By having such characteristics of high light transmittance and low surface gloss, it becomes possible to see through the colored layer for the first time, and it also becomes possible to exhibit a more leather-like matte gloss color tone.

A stretched polyester film having such characteristics is characterized by having fine irregularities on its surface. The method for producing such a polyester film is not particularly limited, but examples include a method in which polyester containing granular filler is formed into a single stretched film, and a method in which polyester containing filler is coextruded and stretched on at least one side. There is a method for applying a composite film, or a method for sand matting the surface of a stretched film to which no filler is added by spraying silica sand or the like.

As the filler to be added to the surface stretched polyester film, the same filler as added to the inner stretched plastic film can be used, and both inorganic particles and organic particles can be used. Inorganic particles include calcium carbonate, magnesium carbonate, and alumina.

Aluminum silicate, kaolin, kaolinite.

Examples include talc, clay, diatomaceous earth, dolomite, titanium oxide, and magnesium oxide 1 zeolite. These inorganic particles may be used alone or in combination of two or more.

Furthermore, as the organic particles, synthetic resin particles having good releasability from polyester can be used. For example, polyethylene, polypropylene.

Examples include polyolefin resins such as polybutene and polymethylpentene. These organic particles can also be used alone or in a mixture of two or more.

It is desirable that the amount of filler added to the stretched polyester film be less than that, since voids will occur if the stretched plastic film is polyphonic.

That is, it is desirable that the amount is less than 5% by weight, more preferably 3% by weight or less, based on the polyester polymer.

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. Inorganic particles or organic particles can be used as the filler.

Examples of the inorganic particles include calcium carbonate, magnesium carbonate, alumina, aluminum silicate, kaolin, kaolinite, talc, clay, diatomaceous earth, dolomite, titanium oxide, 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 preferable to keep it in the range of 5% by weight. 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 by mechanical wrinkling processing such as rolling.
When the amount exceeds 0% by weight, the stretched film becomes brittle and easily breaks during stretching.

The stretching of the film may be uniaxial stretching only in the longitudinal direction, or biaxial stretching in the longitudinal 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.

In addition, the distribution of voids within the stretched plastic film is
It is not necessarily necessary that the voids 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 11 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-like sheet shown in FIG. 2 or FIG. In such a case, it is preferable to laminate void-free thin films 12 on both sides of the film 11. Alternatively, as shown in FIG. 7, a void-free film 12 may be composited on one side, and a film 13 with a low content of voids 41 may be composited on the other side. 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 is a woven fabric or double material made of 9 natural fibers, 9 synthetic fibers, and 5 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 in the present invention can be used by appropriately selecting the thickness, fuzziness, softness, etc. of the flexible sheet, and thereby controlling the uneven pattern of the fake leather-like sheet in various ways. I can do it. 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 pseudo-leather-like sheet. The thickness of this flexible sheet layer is preferably selected within the range of 20 μm to 5 μm, and may be appropriately determined depending on the use of the pseudo-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. The mechanical wrinkling of this uneven pattern can be carried out at room temperature by adding a filler amount of 10 to 40% by weight and the presence of a stretched plus rank film with an apparent ratio of UO of 1 or less. However, it is not necessarily necessary to do it under heating.

This kind of mechanical wrinkling process makes it easy to create molds 4-
To achieve this, the thickness of the stretched polyester film should be 1.07 times or more, preferably 0.05 to 0.6 times, more preferably 7↓;
It is preferable to set the range to -0.3 times.

Also, take the absolute value of stretched polyester film.

The thickness of L7 is not particularly limited as long as it has the following relationship with respect to the stretched plastic film, but preferably L7< is 6 to 6.
It is preferable that the thickness be 50 μm, more preferably 10 to 40 μm. On the other hand, stretched plus-thick film is 30 to 1
The thickness is preferably 50 μm, more preferably 60 to 120 μm.

The colored layer between the stretched glass 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 1'1 may be used as the coloring agent. In addition, the adhesive may be a special C,'' although it is not limited, in order to sufficiently stamp the uneven distortion formed in the stretched polyurethane film onto the stretched polyvarnish 5-rufil J.
It is desirable to select an adhesive that has good affinity for . The adhesive 2 is preferably one based on synthetic resin such as polyurethane or acrylic. More specifically, reactive or self-pear-bridge type acrylic ester adhesives, thermosetting urethane adhesives, ebony palm contact agents,
Examples include RyoJ, type adhesives, and the like.

Polypropylene with an old (melt inden lath, based on ASTM 1238 The film was sequentially biaxially stretched to 7.0 times and then heat-set to obtain a stretched film 1 having a void ratio of 32% and a thickness of 80 μm. This stretched film was subjected to gravure printing with Dainichisei Kachogyo@gAp Cocose Beni. The surface color tone is DCA...M (70) O(
60) B (30) (Shogakukan (arrival/departure in 1989)
The color was red (based on the Designer's Color Atlas).

The printed surface of this printed stretched film has a light transmittance of 60%.
1. A 25μ polyester film with a surface gloss level of 17 (Lumirror “X43” manufactured by Toshi Corporation) was bonded with a polyurethane adhesive (
Seikabond E 260/C26) manufactured by Hitoseika Kogyo ■
Laminated with. Furthermore, T/
R7050 (fabric made of 50 polyethral rayon fibers) was coated with polyurethane adhesive (Seiryoku Bond E 260/
C26) was used for adhesion and lamination.

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 uneven pattern (not the same pattern), uneven wrinkle pattern, and surface color mD CA -
-M(50)O(30)B (The pink pseudo-leather look of 5(1) was obtained.

In addition, 1. This wrinkled laminated seal 1 was easily re-creased by manual insertion, and the uneven pattern was further changed.

Furthermore, when this laminated sheet was used to create a small hanger, a product with a surface pattern and a different surface appearance was obtained.

〔Effect of the invention〕

The pseudo-leather-like sheet of the present invention 1 has a surface layer composed of a stretched polyester film having a light transmittance of 55% or more and a surface gloss of 5 to 50, as described in 10-1, and this surface layer covers the colored layer. Because of this, the color of the colored layer can be seen through, and c.
r. Creates a special matte gloss color that resembles leather. Moreover, this faded gloss color tone is achieved by the surface unevenness pattern produced by the stretched plastic film containing 10 to 40% by weight of filler and having an apparent specific gravity of 1.0 or more, giving it a faux leather-like appearance. can be made into something. Furthermore, since the surface layer is covered with a stretched polyester film, the special color tone shown in "-" does not fade, and it can be made to have excellent abrasion resistance and stain resistance.

In addition, by laminating stretched plastic films containing the above-mentioned filler and having an apparent specific gravity of 1.0 or less, uneven patterns can be formed even at room temperature, which prevents thermal deterioration of the sheet material. There is no. In addition, conventional embossing, rolling (hand and machine), etc.
You can also obtain a special uneven look of "Product - Looks".

[Brief explanation of drawings]

FIG. 1 is a schematic vertical cross-sectional view showing a part of a fake leather-like sheet according to an embodiment of the present invention, and FIG. 2 is a schematic longitudinal cross-sectional view showing a part of a simulated leather-like sheet according to another embodiment of the present invention. FIG. 3 is a schematic vertical sectional view of the simulated leather-like sheet shown in FIG. 1 before being mechanically wrinkled, and FIG. FIG. 5 is a schematic vertical cross-sectional view showing a part of the leather-like sheet; FIG. 8 are schematic longitudinal cross-sectional views showing a portion of the stretched plastic film used in the simulated leather-like sheet of the present invention. 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. A pseudo-leather-like sheet comprising a stretched polyester film having a surface gloss of 55% or more and a surface gloss of 5 to 50, 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 light transmittance of 55% or more and a surface layer laminated with a colored layer on one side of the stretched plastic film. Consisting of a stretched polyester film with a glossiness of 5 to 50 and a flexible sheet laminated on the other side of the stretched plastic film,
A pseudo-leather-like sheet having an uneven pattern formed on the surface of the stretched polyester film.