JPS5848347B2 - Decorative material manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION As a manufacturing method for decorative materials for laminating decorative paper, as described in Japanese Patent Application Laid-Open No. 48-877, etc., a synthetic resin is applied and impregnated, and then a desired pattern is provided, and the entire surface including the pattern is synthesized. Although there is a method of applying a resin and laminating it with a base material via an adhesive, coating and impregnating a synthetic resin to increase the strength between paper layers is actually not sufficient because there is a limit to the amount of impregnation.

The reason for this is firstly that the surface of the base paper that is suitable for printing has improved smoothness, which inevitably results in a decrease in water absorption.

Therefore, the amount of impregnation is reduced.

Second, if the coating is applied and impregnated until it is absorbed from the front surface to the back surface, the pressure rolls and guide rolls of the coating machine, printing machine, etc. will become dirty, making continuous work impossible.

Thirdly, when the amount of impregnation is increased, it penetrates into the fibrils of the base paper pulp, making it extremely transparent, etc. In reality, the resin remains in the middle between the layers, so there is no resin layer on the back side of the base paper. Exists in pulpy form.

Therefore, the interlayer strength of the paper is not sufficient, and the water resistance is also poor, which causes cracks to occur between the base paper layers when used for exterior materials, etc.

In addition, products that have undergone the impregnation process are inefficient and expensive, and the surface must be pressed to make the surface smooth after impregnation.

The present invention solves all these drawbacks.

That is, coating or impregnating the back side of base paper with good penetration, then applying or impregnating the coating resin from the front side, forming any pattern on it, laminating it with the base material via adhesive, and then laminating it with the base material. This relates to a method for producing a decorative material in which either a synthetic resin is applied to the entire surface with a pattern, or after an arbitrary pattern is created, a synthetic resin is applied to the entire surface including the pattern and laminated with an adhesive.

The present invention will be explained using the drawings.

In Figure 1, 1 is a base paper made from sulfide pulp and kraft pulp, and since resin is applied and impregnated from the back side, the back side is porous and has a rough surface, and the surface is highly smooth with good printability. One with a high degree of hardness is suitable.

2 is a resin that is applied and impregnated from the back side, and 3 is a resin that is applied and impregnated from the front side.

The same resins as 2 and 3 can be selected, but 2 has a relationship with the adhesion to the adhesive, and 3 has a relationship with the subsequent printing ink and top coat, so these must be taken into consideration when selecting.

Examples of resins 2 and 3 include polyester resins, melamine resins, acrylic resins, vinyl resins, alkyd resins, nitrocellulose resins, epoxy resins,
A urethane resin or the like can be used, and a roll coater, a gravure coater, a bar coater, an air knife coater, a flow coater, a spray coater, etc. are used as the coating method.

When coating and impregnating steps 2 and 3 are performed simultaneously in the same machine, or coating and impregnating from the back side and winding it once after drying,
In the next step, coating and impregnation may be applied from the surface using the same machine before pattern printing.

The coating amount is 25% of the basis weight of the base paper, including 2 and 3.
The front and back are suitable, but the more the number 2, the better.

4 is a printing ink, and vehicles include oils and fats such as linseed oil and soybean oil, natural resins such as rosin, maleic acid resins, alkyd resins, amino alkyd resins, urethane resins, phenolic resins, melamine resins, vinyl resins,
Synthetic resins such as acrylic resins, cellulose derivatives such as nitrocellulose and ethylcellulose, and synthetic rubbers such as chlorinated rubber can be used.Printing methods include offset printing, gravure printing, letterpress printing, and screen printing. Methods etc. can be used.

5 is a resin that is applied to the entire surface including the pattern, and examples of this resin include polyester resin, melamine resin, acrylic resin, vinyl resin, alkyd resin, epoxy resin, urethane resin, phenol resin, Polyamide resin can be used, and silicone, wax, etc. may be added to improve slip properties.

In the case of precoated paper, the above resin is applied in advance and then laminated to the base material via an adhesive.

Possible coating methods in this case include gravure coating, roll coating, reverse roll coating, bar coating, air knife coating, and spray coating.

In the case of after-coating, the above-mentioned resin is applied after the printing process is completed and the substrate is laminated with an adhesive.

As a coating method in this case, methods such as roll coating, reverse coating, flow coating, and spray coating are used.

6. Adhesives include urea resin, melamine resin, polyester resin, polyurethane resin, epoxy resin, phenol resin, polyvinyl acetate, polyvinyl alcohol, vinyl chloride resin, acrylic resin, and nitrocellulose resin. Alternatively, rubber-based materials such as glue, casein, starch, dextrin, etc. can be used.Substrate materials include metal plates, plywood, hard boards, particle boards, etc., wood boards, slate pulp cement boards, and wood wool cement. Boards, inorganic boards such as rock wool, synthetic resin boards, etc. can be used.

Next, examples of the present invention will be shown.

In addition, all "parts" in the examples mean "parts by weight."

Example 1 From the back side of a sheet with a basis weight of 40.9, a resin of the following composition was applied using a gravure coater. Coated and impregnated polyester, dap type resin 100 parts PERMLATE
P-1 (manufactured by Inu Nippon Ink) Cobalt chloride 5 parts 150'
C. Dry for 1 minute and roll up.

Next, using this, a resin containing 100 parts of aminoalkyd resin and 5 parts of curing agent was applied and impregnated by gravure coating method, a pattern was printed using gravure ink, which is a nitrocellulose vehicle, and the surface was coated with acrylic urethane. 100 parts of resin (UR2
03) Incyanate manufactured by Toyo Ink Co., Ltd. 23 parts Slip agent (silicone) 13 g/- of a resin blended in 3 parts was dry coated using a gravure coating method and wound up.

Next, use vinyl acetate adhesive to attach this to 4 5 9//rr
? Wet laminated with plywood.

The decorative board thus obtained had high interlaminar strength.

Example 2 Using the back side of single gloss kraft paper (37 g/-), first apply 7 g/- of the resin of the following composition from the back side using an air knife.
Dry coating After impregnating and drying for 1500C1 minute, the surface is coated with a resin of the following composition 3g/-dry with a reverse roll, dried for 1500C1 minute, and finally dried with a drum dryer and wound up.

Formulation example MADURIT LT powder (urea 1. O O
Part melamine resin) Hekis 1, Japan XT-790 (penetrating agent) Hekistoji 0.3 part Yapan ammonium chloride 0.3 part Glucosizer #100 Guneika 20 Part Gakusui 200 parts and rolled up. Gravure printing is performed on the surface of the base paper using exterior ink using acrylic urethane as a vehicle, and the paper is rolled up.

Add this to urea vinyl acetate adhesive 4 5 9,//? 7Z2
Wet type with a thickness of 4m/m ■Laminated with plywood, then coated with resin using the following method using a roll coater.
0 9/nX Dry coating.

Mixing example EP Coat Arashi 300-31 Clear (acrylic urethane resin) Hardening agent manufactured by Chugoku Paint Co., Ltd. 5], -D EP Coat Thinner WF manufactured by Chugoku Paint Co., Ltd. 6 parts 1 part 2 parts In this way, the plywood made is water resistant. ■-We were able to create a product with a clear design that could be used as an exterior packaging.

[Brief explanation of the drawing]

The drawings are explanatory diagrams of the method of the present invention. 1...Base paper, 2...Resin from the back side,
3... Resin from the surface, 4... Printing ink, 5... Resin, 6... Adhesive, 7
······Base material.

Claims (1)

[Claims] 1 Apply and impregnate synthetic resin from the back side of the base paper, which has good penetration.
After that, the surface is coated and impregnated with synthetic resin, a desired pattern is formed on it, and the synthetic resin is applied to the entire surface including the pattern, after lamination with the base material via adhesive, or
Alternatively, a method for producing decorative materials in which a desired pattern is created, a synthetic resin is applied over the entire surface including the pattern, and the material is laminated with an adhesive.