JPH0967780A - Production of vinyl chloride leather with squeezed pattern - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a vinyl chloride leather sheet having a fine squeezed pattern by piling a sheet having a squeezed pattern on the surface of a vinyl chloride leather sheet in a heated and softened state, sticking them under pressure, cooling and releasing the piled sheet. SOLUTION: A vinyl chloride leather 1' wound in a roll state is continuously drawn out and the surface layer of the leather is heated by a heater 4 into a softened state. The squeezed pattern forming face of a squeezing sheet 3 such as squeezing release paper or fabric is piled on the surface layer of the leather and pressed between a pressure contact roller 2a having a flat or an uneven surface which is cooled and a back-up roller 2b made of rubber having the similarly cooled surface, then cooled through cooling drums 5 and the squeezing sheet 3 is released to give the objective vinyl chloride leather with a squeezed pattern.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to furniture, vehicles, bags,
The present invention relates to a method for producing vinyl chloride leather with a striation pattern used for shoes, surface materials for interiors, and the like.

[0002]

2. Description of the Related Art Conventionally, vinyl chloride leather has been used as one of the materials used for furniture, vehicles, bags, shoes, interior surface materials and the like. The method for producing vinyl chloride leather is roughly classified into a so-called calendar method and casting method.

The method for producing vinyl chloride leather by the above-mentioned calendar method is generally a method in which a vinyl chloride resin obtained by suspension polymerization (suspension polymerization) is added to a plasticizer, a stabilizer, an inorganic filler and a coloring agent. A vinyl chloride resin compound obtained by rolling a vinyl chloride resin compound to which an agent or the like is added with a calendar roll is laminated with a base cloth. On the other hand, the method for producing vinyl chloride leather by the casting method generally involves adding a vinyl chloride resin obtained by an emulsion polymerization method (paste polymerization method) to a plasticizer,
A vinyl chloride paste sol to which a stabilizer, a colorant and the like have been added is coated on release paper and the like, and the vinyl chloride resin layer obtained by heating and gelling is laminated with a base cloth.

[0004]

By the way, a so-called embossing method is generally used as a means for applying a striation pattern to the surface of the vinyl chloride leather obtained as described above.
The squeezing by the embossing method is to try to form irregularities on the vinyl chloride leather surface by pinching the vinyl chloride leather between the embossing roll having the irregularities formed on the surface and the backup roll. It was difficult to express a tie pattern, especially a shallow tie pattern. Also, in order to form a wide variety of squeezing patterns, it is necessary to prepare as many embossing rolls as possible, but the embossing rolls themselves are very expensive, so small-volume production of other types is required. In such a case, there is a problem that the manufacturing cost becomes high.

Further, in the case of casting method, as release paper coated with vinyl chloride paste sol,
By using a so-called squeeze release paper with a squeezing pattern formed on the surface, it is possible to express even a fine squeezing pattern that cannot be expressed by the embossing method, but vinyl chloride paste sol is heated and gelled. In doing so, the release paper and the like are also placed at a high temperature, so that there is a problem that the release paper and the like are deteriorated quickly and the product cost of the resulting vinyl chloride leather increases.

The present invention has been made to solve the above problems, and even vinyl chloride leather manufactured by the calendar method can express a fine squeezing pattern, and the manufacturing cost is reduced. An object of the present invention is to provide a method for producing a vinyl chloride leather with a striation pattern that is not much different from conventional methods.

[0007]

A method for producing a vinyl chloride leather with a striation pattern of the present invention, which was made to solve the above-mentioned problems, is a vinyl chloride resin of vinyl chloride leather produced in advance by a calendar method, a casting method or the like. After heating and softening the surface layer, the squeezing pattern-formed surface with the squeezing pattern on the surface and the heat-softened vinyl chloride resin surface layer are superposed so that they are in contact with each other, and then pressure-bonded. The squeezing sheet is peeled off.

The above-mentioned vinyl chloride leather is a vinyl chloride resin composition obtained by adding a plasticizer, a stabilizer, a foaming agent, an inorganic filler, a colorant and the like to a vinyl chloride resin as needed. A resin layer and a base cloth are laminated.

As the vinyl chloride resin, any one can be used as long as it has been conventionally used in vinyl chloride leather. Specifically, the average degree of polymerization is 8
In addition to polyvinyl chloride of about 00 to 2000, preferably about 800 to 1500, a copolymer resin mainly composed of vinyl chloride with ethylene, vinyl acetate, methacrylic acid ester, etc., or a resin of these resins and a polyester resin, an epoxy resin Resin, acrylic resin, vinyl acetate resin, urethane resin, acrylonitrile, styrene-butadiene copolymer resin, mixed resin with partially saponified vinyl alcohol and the like.

Specific examples of the plasticizer include phthalate ester plasticizers such as di-2-ethylhexyl phthalate, phosphate ester plasticizers such as tricresyl phosphate, and the like.
Adipate plasticizers such as di-2-ethylhexyl adipate, sebacate plasticizers such as di-2-ethylhexyl sebacate, azelaic ester plasticizers such as di-2-ethylhexyl azelate, polypropylene adipate, etc. Examples of the polyester plasticizer, epoxidized soybean oil and other epoxy plasticizers, chlorinated paraffin and other chlorinated fatty acid ester plasticizers, and the like. The above plasticizers may be used alone or in combination of two or more. The amount of the plasticizer added is 10 to 120 parts by weight, preferably 30 to 90 parts by weight, based on 100 parts by weight of the vinyl chloride resin.

The base cloth laminated with the vinyl chloride resin layer may be any of woven cloth, knitted cloth, non-woven cloth, and the fibers constituting the base cloth are polyester, polyamide,
It may be any of synthetic fibers such as polyacrylonitrile, polyolefin and polyvinyl alcohol, natural fibers such as cotton and hemp, and recycled fibers such as rayon, staple fiber and acetate.

When the above-mentioned vinyl chloride leather is produced by the calendering method, various additives optionally added are blended with the vinyl chloride resin at a desired ratio and mixed with a Henschel mixer, Banbury mixer or the like. The mixture is sufficiently kneaded with a machine, and the obtained compound is rolled by a calender roll to laminate a vinyl chloride resin layer obtained and a base cloth. At this time, an adhesive may be used if necessary.

When the vinyl chloride resin layer is used as the foam layer,
The vinyl chloride resin layer and the base cloth may be laminated and then foamed, or the previously foamed vinyl chloride resin layer and the base cloth may be laminated.

When the above-mentioned vinyl chloride leather is produced by the casting method, the vinyl chloride resin is mixed with various additives which are optionally added in a desired ratio, and a dispersing machine such as a dissolver or a homomixer is sufficient. The release sol or the like is coated with the paste sol obtained by mixing with the above, and the vinyl chloride resin layer obtained by heat-gelling and the base cloth are laminated. At this time, an adhesive may be used if necessary. Alternatively, the paste sol may be directly coated on the base cloth without using release paper or the like. When the vinyl chloride resin layer is used as the foaming layer, the paste sol is heated to gel and then foamed.

In the above vinyl chloride leather, the vinyl chloride resin layer is not limited to a single layer, but may be composed of a plurality of layers. Further, when the vinyl chloride resin layer is formed of a plurality of layers, each layer may be the same, for example, the surface layer is a non-foaming layer, and the intermediate layer located thereunder is a foaming layer. They may be different ones. Furthermore, if necessary, the surface of vinyl chloride leather may be subjected to various surface treatments or print pattern printing. Furthermore, if necessary, the surface of vinyl chloride leather may be embossed to form irregularities. In this case, the squeezing pattern on the surface of the squeezing sheet is transferred only to the convex portion in the subsequent step, and a novel design that has not been available can be expressed.

The vinyl chloride leather obtained as described above is subjected to heating and softening of the vinyl chloride resin surface layer, and then superposed with a squeezing sheet and pressure-bonded. The crimping means may be a means for sandwiching and clamping the vinyl chloride leather laminated with the squeezing sheet between the plate-like objects, but in the means for sandwiching and sandwiching between the plate-like objects, the manufacturing process There is a problem that it is not efficient because it has to be intermittent. Therefore, in the present invention, the means for crimping the vinyl chloride leather laminated with the squeezing sheet is preferably a means for sandwiching and pressing the vinyl chloride leather laminated with the squeezing sheet between the pressure-bonding roll and the backup roll.

The above-mentioned pressure-bonding roll is usually a metal roll, and may have a flat surface or may have irregularities formed on the surface. If the pressure roll is flat, the squeezing pattern formed on the squeezing sheet is faithfully transferred to the surface of the vinyl chloride leather. On the other hand, by using a crimping roll with unevenness on the surface, the drawing pattern formed on the squeezing sheet and the concavo-convex pattern formed on the surface of the crimping roll can be combined to create an unprecedented new design expression. Becomes The backup roll is usually a rubber roll, but is not limited to this and may be a metal roll having a flat surface.

The surface of the pressure roll and / or the backup roll is preferably cooled. By forcibly cooling the surface of the pressure-bonding roll and / or the backup roll, the heat of the vinyl chloride leather previously heated is not accumulated in the pressure-bonding roll and / or the backup roll, and the adverse effect of heat can be prevented. . As the cooling means, any means such as a means for circulating cold water inside the roll, a means for allowing a part of the roll to pass through a tank filled with cold water, a means for blowing cold air on the surface of the roll may be used.

As the squeezing sheet, a squeezing release paper having a squeeze pattern formed on its surface, a releasable synthetic resin sheet, or a cloth can be used, but preferably a squeezing release paper having a squeeze pattern formed on its surface is used. Alternatively, it is a cloth. As the cloth, the same cloth as the vinyl chloride leather base cloth can be used. Further, when a cloth is used as the squeezing sheet, it is possible to obtain a vinyl chloride leather to which the texture of the cloth itself is transferred.

The present invention is characterized by heating and softening the vinyl chloride resin surface layer of vinyl chloride leather (the vinyl chloride resin layer on the surface of vinyl chloride leather) before stacking the squeezing sheets. Thus, by heating and softening the surface of the vinyl chloride leather before stacking the squeezing sheets, the squeezing sheets are not placed under high temperature, and the squeezing sheets are less likely to be thermally deteriorated. for that reason,
According to the manufacturing method of the present invention, the squeezing sheet can be repeatedly used, and the manufacturing cost of the resulting product leather can be reduced.

Moreover, according to the production method of the present invention, since the vinyl chloride leather is produced in advance, even if the vinyl chloride leather produced by the calendar method is used,
Even vinyl chloride leather produced by the casting method can be treated in substantially the same manner. In particular, even with vinyl chloride leather produced by the calendering method, which was conventionally impossible to transfer the squeezing pattern formed on the squeezing release paper, the squeezing pattern formed on the squeezing release paper etc. It is possible to transfer, and therefore, a fine squeezing pattern which can be expressed only on the vinyl chloride leather obtained by the casting method in the past can be expressed on the surface of the vinyl chloride leather obtained by the calendar method.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION The manufacturing method of the present invention will now be described in more detail with reference to the drawings. FIG. 1 is a process chart showing an embodiment of the production method of the present invention. In the figure, 1'is vinyl chloride leather without a drawing pattern, 2a is a pressure roll, and 2a is a pressure roll.
Reference numeral b indicates a backup roll, and 3 indicates a squeezing sheet.

The vinyl chloride leather 1'preliminarily manufactured and wound into a roll is first heated by a heating means (heating heater) to about 150 to 230 ° C. to soften the vinyl chloride resin surface layer. It

Next, the squeezing sheet 3 wound in a roll is wound around the pressure bonding roll 2a, and the squeezing sheet 3 is wound.
Is superposed so that the squeezed pattern forming surface and the vinyl chloride resin surface layer in the heat-softened state are in contact with each other, and then the pressing roll 2a and the backup roll 2b squeeze. The pressure bonding roll 2a is a metal roll having a flat surface, and the backup roll 2b is a rubber roll having a flat surface. The rubber roll 2b is forcedly cooled by passing through the tank 6 containing cold water.

The vinyl chloride leather 1'compressed with the squeezing sheet 3 passes through a cooling drum 5 and is cooled, and then the squeezing sheet 3 is peeled off to obtain a vinyl chloride leather 1 with a squeezing pattern. . The squeezing sheet 3 is peeled off from the vinyl chloride leather and then wound into a roll,
It is used again as the squeezing sheet 3. In this example, the squeezing sheet 3 is wound in a roll shape, but an endless belt shape in which both ends are connected can also be used. However, when using a squeezing sheet in the shape of an endless belt, it takes time to replace the squeezing sheet. It is more preferable to unroll and use the attaching sheet.

[0026]

According to the manufacturing method of the present invention, a fine squeezing pattern, which has hitherto been possible only on the vinyl chloride leather obtained by the casting method, is also expressed on the surface of the vinyl chloride leather obtained by the calendar method. be able to. Moreover, unlike the case of using release paper with a drawing pattern by the conventional casting method, the drawing sheet such as the release paper is not placed under high temperature, so the heat deterioration of the drawing sheet itself does not easily occur. It is possible to use the squeezing sheet repeatedly.

Further, if the pressing of the squeezing sheet and the vinyl chloride leather is carried out by sandwiching between the pressing roll and the backup roll, the squeezing pattern on the surface of the squeezing sheet is continuously transferred to the surface of the vinyl chloride leather. You can At this time, if the surface of the pressing sheet is flat, it is possible to faithfully transfer the drawing pattern on the surface of the drawing sheet. The pattern and the concavo-convex pattern on the surface of the pressure-bonding roll can be combined to express a new design that has never existed before. Further, by forcibly cooling the surfaces of the pressure-bonding roll and / or the backup roll, the heat of the vinyl chloride leather heated previously is not accumulated in the pressure-bonding roll and the backup roll, and the adverse effect of the heat can be prevented.

[Brief description of drawings]

FIG. 1 is a process drawing showing an example of the manufacturing method of the present invention.

[Explanation of symbols]

 1 Vinyl chloride leather with squeezing pattern 1'vinyl chloride leather 2a Crimping roll 2b Backup roll 3 Squeezing sheet 4 Heating heater 5 Cooling drum

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[Procedure amendment]

[Submission date] August 7, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

Wherein the surface of the press roll and / or the backup roll method according to claim 2 Symbol placement of grain vinyl textured chloride leather is cooled.

Claims (6)

[Claims] 1. A vinyl chloride resin surface layer of a squeezing sheet on which a vinyl chloride resin surface layer of vinyl chloride leather produced in advance is softened by heating, and then a squeezing pattern is formed on the surface of the squeezing sheet. A method for producing vinyl chloride leather with a tie pattern, which comprises stacking the layers so that they are in contact with each other, press-bonding them, cooling them, and then peeling off the squeezing sheet. 2. The method for producing a vinyl chloride leather with a squeeze pattern according to claim 1, wherein the squeezing sheet and the vinyl chloride leather are pressure-bonded by sandwiching them with a pressure roll and a backup roll. 3. The method for producing vinyl chloride leather with a drawn pattern according to claim 2, wherein the surface of the pressure roll is flat. 4. The method for producing a vinyl chloride leather with a striation pattern according to claim 2, wherein the surface of the pressure roll is provided with irregularities. 5. The method for producing vinyl chloride leather with a drawn pattern according to claim 2, wherein the surface of the pressure roll and / or the backup roll is cooled. 6. The method for producing a vinyl chloride leather with a squeeze pattern according to claim 1, wherein the squeezing sheet is a squeeze release paper or a cloth.