JPH0369681A - Production of glittering synthetic resin sheet - Google Patents

Abstract

PURPOSE:To obtain the subject synthetic resin sheet exhibiting high luminance and having excellent decorative effect by forming an uneven synthetic resin pattern layer on a substrate layer, placing a glittering material on the protruded part of the pattern layer and contacting the protrusions with a mirror-finished hot roll. CONSTITUTION:A surface of a flat releasing sheet 1 is fully covered with a flat layer of a polyvinyl chloride resin paste. Relief patterns 3, 3' are formed on the layer in a state to expose a part of the flat layer using a polyvinyl chloride resin paste produced by compounding a pigment to the above paste. Similarly, a relief pattern 3''. is formed with a paste produced by adding a glittering material to the above paste and the paste is cured with heat to obtain a transfer sheet. The releasing sheet 1 is peeled off from the transfer sheet 4, a substrate layer 5 is pasted to the exposed flat layer 2 with an adhesive and a mirror-polished hot roll 7 is made to contact with the protrusions of the relief patterns to obtain a highly glittering synthetic resin sheet having excellent decorative effect.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a synthetic resin sheet having an uneven pattern suitable for use as furniture covering materials for bags, bags, chairs, etc., vehicle seats, shoe covers, etc. The present invention relates to a method for manufacturing a highly decorative synthetic resin sheet in which a glittering material is arranged on the convex portions of a concavo-convex pattern layer.

[Conventional technology]

Conventionally, printing is performed on the convex portions of a synthetic resin sheet with a concavo-convex pattern formed on an appropriate base material using an ink containing a glittering pigment containing aluminum or the like, thereby imparting glitter to the part, There was something that emphasized the design.

[Problem to be solved by the invention]

However, simply printing with ink containing bright pigments does not produce brightness, so performance can be improved by adjusting the particle size of aluminum powder in the ink or increasing its concentration. must be measured.

However, even with this method, not only is it not possible to exhibit sufficient glitter, but there are also drawbacks such as deterioration of workability due to increased viscosity of the ink, and additional factors that increase costs.

[Means to solve the problem]

The present invention provides a method for producing a highly decorative glittering synthetic resin sheet that is free from such drawbacks and can fully exhibit the glittering properties of the glittering material arranged on the convex portions of the uneven pattern layer. be.

That is, the gist of the method of the present invention is that the convex portions of a synthetic resin sheet in which a glittering material is arranged on the convex-convex synthetic resin pattern layer on the base layer are brought into contact with a specular heated roll. A method of manufacturing a patented base resin sheet is provided.

All materials that can be used as the above base material layer can be used for this type of synthetic resin sheet, such as natural fibers such as cotton, cotton wool, polyester fibers, polyamide mesh fibers, and vinylon fibers, synthetic fibers, etc. In addition to fabrics such as woven fabrics, nonwoven fabrics, and knitted fabrics, various synthetic resin films and sheets can be exemplified.

Further, as the base material layer, a composite material in which a synthetic resin layer such as non-foamed or foamed vinyl chloride resin is laminated on these materials can also be used.

As the uneven synthetic resin pattern layer, any material used in this type of synthetic resin sheet can be used, and specific examples include those mainly made of polyvinyl chloride resin, urethane resin, and acrylic resin.

In forming the uneven synthetic resin pattern layer, it is preferable to employ a method in which the above-mentioned resin material is made into a sol or solution and applied once or multiple times by means such as coating or printing. Alternatively, mechanical embossing during or after the formation of the synthetic resin pattern layer, or chemical embossing using a foaming inhibitor or the like may be used. On the base layer,
Although this uneven synthetic resin pattern layer may be directly formed, it is preferably used for the purpose of concealing the base material layer, for the purpose of providing a background for the uneven synthetic resin pattern, or for improving the smoothness of the surface of the uneven base material layer. For the purpose of application, it is preferable to form one to two or more synthetic resin layers, so-called solid layers.

These solid layers and uneven synthetic resin pattern layers may be formed by directly coating or printing the above-mentioned sol-formed or solution-formed resin material on the base material layer, or by laminating the resin material by means such as printing. A transfer sheet is first created by coating a release sheet and laminating them by printing or other means, then this transfer sheet is peeled off to expose the back side of the solid layer to the outside, and then the base material is applied to the exposed back side. The layers are laminated, preferably via an adhesive.

Adhesives include typical two-part reactive urethane adhesives, as well as acrylic, vinyl acetate, PVA, and SBR.
, NBR, CR, NR, etc., various resin-based adhesives, base rubber-based solvent-based adhesives, and emulgitane-based adhesives can be used.

Note that if heating is required to bring out the adhesive strength of the adhesive during this bonding, consideration must be given to materials that are not heat resistant or materials that expand and contract when heated.

Specifically, for example, in the case of a base material layer that is a composite material in which a foam layer of vinyl chloride resin is laminated on a knitted cloth, 150
℃ or less, and 130'C or less is a desirable temperature condition when trying to suppress as much as possible the decrease in thickness due to collapse of foam cells due to secondary foaming.

In order to ensure adhesive strength at temperatures below 130°C, it is preferable to use a two-component reactive urethane adhesive, and in this case, the drying temperature of this adhesive is below 80°C, preferably below 50°C. If necessary, it is preferable to age the adhesive at 50 to 60°C for 24 hours or more after lamination to accelerate the reaction of the adhesive.

The method of using such a transfer sheet is effective when the base material layer has elasticity, for example, when knitted fabric such as knitted fabric is used as the base material layer, there is no fear of pattern misalignment in printing.

The release sheet used in this transfer method is typically a release paper with a smooth surface, or a release paper with textured texture similar to natural leather, which is generally used in the field of synthetic leather manufacturing. In addition, release films and sheets such as polyester films and sheets can also be used.

Concave and convex synthetic resin pattern layer, including solid layer in some cases,
For coating and printing to form these, for example, a doctor knife coke-squeeze roll coater is used.
, reverse roll coater, gravure printing, screen printing, and other known methods can be used.

The formation of the uneven synthetic resin pattern layer is preferably carried out multiple times by gravure printing using a gravure roll with a deep plate depth, screen printing using a rotary screen, etc., to create a raised, rich and consistent appearance of the unevenness. It looks like this.

The resin materials for forming the solid layer and the uneven synthetic resin pattern layer include colorants, crosslinking agents, fillers, stabilizers, matting agents, polishing agents, antifungal agents, foaming agents, and foaming inhibitors as necessary. , a foaming accelerator, etc. can be added.

Furthermore, in the present invention, a glittering material is arranged on the convex portions of the concavo-convex synthetic resin pattern layer.

This glittering material includes gold, silver, pearl, and general glitter pigments that aim for a metallic glitter effect.
An ink containing a fluorescent agent or the like is preferred, but a paste-sol containing a bright pigment may also be used.

If the glittering material is ink-like, the printing means described above can be employed.

The composite Tfi resin sheet thus formed, in which the glittering material is arranged on the convex portions of the concavo-convex synthetic resin pattern layer, is then brought into contact with a heated roll that has been mirror-finished so as not to have convexities and convexities. By bringing it into contact with this specular heat roll, the convex parts of the concave-convex synthetic resin pattern layer on which the glittering material was placed in contact with the specular heat roll are thermally softened or melted, and become extremely smooth and glossy. , surprisingly, the glittering properties of the glittering material also increase.

In addition, if the ink is a paste mainly composed of polyvinyl chloride resin, if an acrylic resin is added in addition to a bright pigment, it will be more likely to be thermally softened or thermally melted when it comes into contact with a mirror heated roll. Improve the condition of the ship.

Furthermore, if an enamel-type surface treatment liquid is applied to at least the glittering convex portions prior to contact with the mirror heated roll, further improvement in gloss can be expected.

(Example) Hereinafter, embodiments of the method of the present invention will be described based on the drawings.

A polyvinyl chloride resin paste made of ink formulation A shown below is printed solidly on a flat releasable sheet (1) using a rotary screen, and gelled in a heating oven to form a 150 μm thick solid J! 1(2) was reproduced.

Ink formulation A Unit: parts by weight Polyvinyl chloride resin 100 DOP 75Ba-Zn composite stabilizer 3 Pigment Appropriate amount Next, a polyvinyl chloride resin paste of an ink formulation in which the pigment in ink formulation A was replaced with another hue was similarly applied on a rotary screen. , previously printed solid layer (2)
The pigment in the ink formulation A is then printed in a raised pattern so that about 50% of the ink is exposed, gelled in a heating oven, and after curing forms a part that will become the uneven synthetic resin pattern N(3). Using a rotary screen, the polyvinyl chloride resin paste containing an ink with a different hue is similarly printed in a raised pattern in synchronization with the previous raised printing pattern, and after curing, the part that will become the uneven synthetic resin pattern layer (3') is shaped. Then, a polyvinyl chloride resin paste made of ink formulation B containing a glittering material shown below is printed in a raised manner on a rotary screen in synchronization with the previous raised printing pattern, and after curing, it is gelled in a heated oven. The part that would become the textured synthetic resin pattern layer (3'') was shaped and introduced into a heating oven to harden all the polyvinyl chloride resin paste ink.

Ink formulation B Unit: Part by weight Polyvinyl chloride resin 100 DOP 75 Ba-Zn composite stabilizer 3 Pigment containing aluminum powder 15 In this way, the releasable sheet CIL synthetic resin solid layer (
2), uneven synthetic resin pattern N (3), (3'), (3'')
A transfer sheet (4) consisting of is prepared, and then, while peeling off the release sheet (1), a synthetic resin solid layer (2), an uneven synthetic resin pattern layer (3), (3°), (3'') are prepared. Next, using a stretchable knitted cloth (50), 100 parts by weight of polyvinyl chloride resin, 80 parts by weight of DOP, and 3. azodicarbonamide were rolled up.
A foamable polyvinyl chloride resin compound consisting of 5 parts by weight and an appropriate amount of pigment is kneaded and put into an inverted calendar,
A resin sheet with a thickness of 0.2 mm is taken out and topped on the knitted cloth, then introduced into a foaming furnace heated to 200°C to foam the topped resin (51), rolled up, and formed into a base material N ( 5) A sheet was produced.

Next, toluene/methyl ethyl ketone = 50150 with a resin solid content of 25% containing a crosslinking agent is added to this base layer (5).
Apply urethane adhesive (6) consisting of a mixed solution using a gravure roll printer! 20 g/m'', and dried this coated surface at 50°C for 1 minute, and then applied the synthetic resin vector 1ii (2), the uneven base t2, and the resin pattern N (3), (3°).
, (3”) synthetic resin solid layer of laminated sheet (2)
A synthetic resin sheet was produced by bonding the back side and passing it between a heat drum at 120'C and a pressure bonding rubber roll.

Next, on the surface of the uneven synthetic resin pattern layer of this sheet, the most raised convex part (3″) of the uneven synthetic resin pattern layer is 125°.
A heated specular heat roll (7) was brought into contact with C.

The resulting synthetic resin sheet has no pattern distortion or pattern misalignment,
Convex part of the uneven synthetic resin pattern layer where glittering material exists (3”)
The sheet had a much higher brightness and was highly decorative than the brightness of the convex portion (3'J portion) of the uneven synthetic resin pattern layer before contact with the mirror heated roll.

[Effects of the Invention] As described above, according to the method of the present invention, by simply bringing a mirror heated roll into contact with the convex portions on which the glittering material of the uneven synthetic resin pattern layer on the base material layer is placed, It is possible to produce a synthetic resin sheet that exhibits much brightness compared to the brightness of glittering materials and has an extremely excellent decorative effect.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of a transfer sheet in the synthetic resin sheet manufacturing method of the invention, and FIG. 2 is a sectional view showing an example of the synthetic resin sheet manufacturing method of the invention. (1)...Release sheet (2)...Synthetic resin solid layer (3), (3"), (3")...Irregular synthetic resin pattern layer (4)...Transfer sheet ( 5) Base material layer (7) Mirror heated roll

Claims (1)

[Claims] (1) Glitter synthesis characterized by bringing the protrusions of a synthetic resin sheet, in which a glitter material is arranged on the protrusions of the uneven synthetic resin pattern layer on the base material layer, into contact with a specular heated roll. Manufacturing method of resin sheet