JPS5847982B2 - Manufacturing method of embossed decorative material - Google Patents

Description

Detailed Description of the Invention The present invention relates to a method for producing a decorative material having an embossed pattern on its surface, which involves coating and impregnating a base paper made of a mixture of heat-resistant resin pulp and wood pulp with a resin. After that, a desired pattern is provided, and a synthetic resin is applied to the entire surface including the pattern, and then embossing is performed to produce decorative paper.Then, the decorative paper is attached to a base material via an adhesive. The present invention relates to a method for manufacturing a decorative material characterized by the following.

Conventionally, laminated decorative boards with embossed patterns on the surface are made by heating and softening vinyl chloride sheets, synthetic paper mainly made of olefin resin, and backing paper coated with vinyl chloride paste, and then removing the convex parts. It is known that an embossed pattern is formed by passing between a cooled mold roll and a rubber roll and continuously pressurized, and then laminated to a base material via an adhesive.

However, since it uses a synthetic resin film, it is expensive, and the surface lacks solvent resistance, making it unsuitable as an interior material.

Another method is to print on paper with a basis weight of around 30 g/piece made from a mixed pulp of kraft pulp and Sanom phytopulp, and laminate it to the base material via adhesive, and then print the resin paint. There is one in which the entire surface is coated on paper and embossed with the base material using a mold roll.

However, in order to emboss something that is integrated with the base material,
It has the disadvantage that it is difficult to emboss deep or rough patterns, and embossing reproducibility varies depending on the quality of the base material.

In order to eliminate these drawbacks, the present inventor provided a pattern on base paper made from a mixture of synthetic pulp and wood pulp, coated the entire surface including the pattern with synthetic resin, and embossed the paper using an adhesive. We devised a method to attach it to the base material.

However, with the decorative materials obtained in this way, there is no problem when the sides are rolled up, but when the sides are not rolled up, the base paper has a weak gap between the layers, and depending on how it is handled, it may turn over from the edges. I found out something.

In addition, it is possible to emboss paper made of decorative paper, which is commonly used as a building material, and coated with Gokai resin.
In addition, although the inter-paper strength is increased compared to those without resin coating, there is a drawback that the embossment returns during lamination.

The present invention was made as a result of research to eliminate the above-mentioned drawbacks, and aims to provide a method for producing an embossed decorative material that has good emboss retention, high paper peeling resistance, and excellent solvent resistance. It is.

That is, in the present invention, a base paper made of a mixture of heat-resistant synthetic resin pulp and wood pulp is coated and impregnated with synthetic resin, an arbitrary pattern is provided, and the entire surface including the pattern is coated with synthetic resin. Post-emboss processing is applied to produce decorative paper,
The present invention relates to a method for producing an embossed decorative material, which comprises then adhering the decorative paper to a base material via an adhesive.

The synthetic resin pulp mixed into the base paper includes polystyrene, aromatic nylon, polyester, acrylic, and other pulps that are heat resistant to temperatures of 100°C or higher.
Any composite resin pulp having heat softening properties may be used.

Polyolefin-based composite resin bulbs such as polyethylene have a low melting point, so they have problems in terms of heat resistance.For example, after embossing, a small amount of heat can melt the resin and cause the embossment to collapse. It is not included in the invention.

The mixing ratio of the amalgamated pulp is preferably 30 to 40% by weight, but it is not limited to this as it varies depending on the type of amalgamated resin pulp, the purpose of use, etc.

In the present invention, if the paper is coated and impregnated in advance, the concealing properties of the paper will deteriorate, so if a light-colored pattern is provided on the base paper, it is possible to create a three-dimensional effect by overlapping with the color or pattern of the base material. It is.

However, if you do not want to be influenced by the pattern, color, etc. of the base material, titanium may be mixed into the base paper to increase the hiding power.

By adding titanium to increase the hiding power, embossing can be performed under a fairly wide range of conditions.

In other words, base paper made by mixing laminated pulp and wood pulp may become transparent depending on conditions such as embossing temperature, embossing pressure, and moisture content of the base paper, but mixing titanium into the base paper can make the base paper transparent. does not occur, so the above conditions are relaxed.

As the resin to be applied and impregnated into the base paper made by mixing resin pulp and wood pulp, alkyd resin, amino alkyd resin, urethane resin, acrylic resin, vinyl resin, polyester resin, urea resin, phenol resin, epoxy resin, etc. can be used.

Provide a pattern (regular ink can be used for this, and any means such as gravure printing, offset printing,
This can be carried out by a letterpress printing method, a screen printing method, a transfer printing method, or the like.

Alkyd resins, amino alkyd resins, urethane resins, acrylic resins, vinyl resins, polyester resins, urea/base resins, phenolic resins, epoxy resins, etc. can be used as the resin to be applied to the entire surface including the pattern, and any pattern can be applied. Apply 7~:tog/= (dry) to the entire surface including the product.

If the finished product requires cellophane tape removability, it is necessary to add silicone wax or the like as a slip agent.

Application methods include roll coating, gravure coating,
Conventional methods such as bar coating, air knife coating, flow coating, dip coating, spray coating, and prep coating can be used.

The embossing method is the so-called paper embossing method, in which decorative paper is continuously passed between a metal embossing roll and its inverse mold under pressure, and the embossed pattern is formed under pressure.This method is used for PVC films, etc. Any conventional embossing method may be used, such as a hot embossing method in which the material is softened in a preheater such as the one described above, and then passed between a metal embossing roll and a rubber back roll, or a method in which a metal embossing plate is used instead of the metal embossing roll.

For metal embossing rolls or metal embossing plates, the temperature is selected to soften or melt the synthetic resin pulp, but for styrene-based synthetic resin pulp, the temperature is 170°C to 170°C.
Approximately 800C is optimal.

Pre-heater (trowel) When softening, an infrared heater or other heat source may be used.

The decorative paper with the embossed pattern thus produced is adhered to a base material via an adhesive.

As the adhesive, phenolic resins, urea resins, epoxy resins, vinyl acetate resins, acrylic resins, polyvinyl resins, starch resins, and the like can be used.

These adhesives include emulsions, solvents, and adhesives. Any shape such as a film type may be used.

Base materials include wood base materials such as natural wood, plywood, particle board, and hardboard, inorganic base materials such as asbestos, cement board, calcium silicate board, special asbestos board, rock wool board, and homocement board, iron plate, and zinc. Metal base materials such as plates, aluminum plates, and base materials such as composite or resin plates can be used.

As explained in detail above (in the present invention, since a base paper made of a mixture of heat-resistant composite resin pulp and wood pulp is used, the disadvantage of embossment returning is greatly improved, and furthermore, this base paper has Because the resin was applied and impregnated, the paper peeling resistance and solvent resistance were also improved.

Next, examples will be shown.

Example 1 Base paper Topka OP40 (manufactured by Topka Co., Ltd.) with a basis weight of 40j; l/m: was prepared by mixing styrene-based synthetic resin pulp with wood pulp at 20 weight φ and adding titanium by 8 weight more than the basis weight of the paper. ) was impregnated with an amino alkyd resin (polymelamine 3000uc manufactured by Inu Nippon Toyo Co., Ltd.) using a 49/1 dry coating, and then a pattern was applied by gravure printing using an ink containing nitrocellulose resin as a vehicle.

Next, use a roll coater to coat the entire surface, including the pattern, with a resin paint containing a certain amount of urethane resin as shown below using a roll coater.
,/m dry.

Acrylic urethane resin UR-203 (manufactured by Toyo Ink Co., Ltd.) 100 parts by weight Silicone (slip agent) 3.3 // Isocyanate resin 23 Next, 18
Pressure embossing was performed at 70 kg/i with a paper embosser using a metal embossing roll heated to 0° C. to obtain decorative paper having an embossed pattern.

Next, a decorative paper coated with urea resin at a rate of about 40 g/rrt (wet) using a roll coater and having the above-mentioned embossed pattern was laminated using a continuous laminator to obtain an embossed decorative material.

This embossed decorative material was a beautiful laminated plywood that did not disturb the embossed pattern.

In addition, this embossed decorative material had excellent interpaper strength I even without side wrapping.

Claims (1)

[Scope of Claims] 1. After coating and impregnating a base paper made of a mixture of heat-resistant synthetic resin pulp and wood pulp with a synthetic resin, an arbitrary pattern is provided, and the entire surface including the pattern is coated with a synthetic resin. 1. A method for producing an embossed decorative material, which comprises applying the embossed material to a decorative paper, applying embossing to produce a decorative paper, and then adhering the decorative paper to a base material via an adhesive. 2. The method according to claim 1, which uses a base paper made by mixing heat-resistant synthetic resin pulp, wood pulp, and titanium.