JPS62128733A - Manufacture of laminated sheet - Google Patents

Abstract

PURPOSE:To manufacture a laminated sheet without being affected by the surface condition of a mirror belt by a method wherein a decorative paper, whose outside is a resin layer having resistance to heat on the surface thereof, and paper, impregnated with cured continuous synthetic resin, are heated through a thermosetting resin to laminate them continuously. CONSTITUTION:Decorative paper 4 is made by a method wherein desired patterns 2 are applied on the surface of raw paper 1 for printing and a resin layer 3, having resistance to heat, is formed further on the surface of the patterns. The continuous decorative paper 4 and paper 5, impregnated with cured continuous synthetic resin, are laminated continuously by a heating and pressing device 6 through thermosetting resin 7 under a condition that the surface, formed with the resin layer 3, is faced to the outside. The resin layer 3 on the surface of the decorative paper is cured perfectly when the resin layer is laminated with the synthetic resin impregnated paper, therefore, the surface configuration of a mirror belt will never be transferred on the surface of the resin layer 3 even if the mirror belt or the like is contacted therewith upon laminating. On the other hand, the thermosetting resin, coated by heating and pressing, impregnates into the decorative paper and is cured subsequently, therefore, the decorative paper and the synthetic resin impregnated paper may be integrated strongly and closely.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a laminated sheet mainly made of synthetic resin-impregnated paper.

(Prior art) In order to continuously produce a decorative sheet whose surface layer is a resin for heat-pressure molding such as melamine resin or diallyl phthalate resin, a continuous decorative paper impregnated with the resin for molding is required. Conventionally, the material is sandwiched between upper and lower mirror-finished belts and continuously heated and pressurized.

However, in this method, when the uncured resin in the impregnated paper is thermally cured, the surface condition of the mirror belt is transferred to the resin layered on the surface of the decorative sheet, so the surface condition of the mirror belt is If there is a defect such as a scratch, the defect is directly reproduced on the surface of the decorative sheet, requiring a great deal of effort to maintain and manage the mirror belt.

(Problems to be Solved by the Invention) The present invention solves the drawbacks of the prior art as described above, and manufactures a laminated sheet mainly made of synthetic resin-impregnated paper without being affected by the surface condition of the mirror belt. This is an attempt to provide a method.

(Means for solving problems) Next, the steps of the present invention will be explained in detail according to the drawings.

First, as shown in Figure 2, a desired pattern (2) is applied to the surface of base paper (1) for printing, and a heat-resistant resin layer (3) is further formed on the surface to create decorative paper (4). Create.

Next, as shown in Fig. 1, the continuous decorative paper (4) and the hardened continuous synthetic resin-impregnated paper (5) are placed with the side on which the heat-resistant resin layer (3) is formed facing outward. and are continuously laminated by a heating and pressurizing device (6) via a thermosetting resin (7).

As the base paper (1), printing paper with a weight of 20 to 60 y/end, mixed paper with reinforced paper spacing, resin-impregnated paper, etc. can be used, and the pattern (2) is nitrocellulose, cellulose acetate, butyral resin, Commonly used inks containing acrylic styrene resin, vinyl chloride vinyl acetate copolymer resin, etc. as a binder can be used.

The heat-resistant resin layer (3) is made of thermosetting resin such as acrylic melamine resin, urethane resin, amino alkyd resin, polyester resin, etc.
(dry> Apply and form, and let it completely harden in the state of decorative paper.

Synthetic resin-impregnated paper (5) is made by impregnating a base paper with good permeability, such as kraft paper, with a thermosetting resin such as polyester resin, diallyl phthalate resin, melamine resin, or phenol resin, and then hardening it. put.

In order to laminate the decorative paper (4) and the synthetic resin-impregnated paper (5), the side of the decorative paper on which the heat-resistant resin layer is not formed,
Or on one side of synthetic resin impregnated paper, or on both sides.
After applying thermosetting resin such as urethane resin or polyester resin, overlap the two and heat at 130 to 160'C for 5 to 50 minutes.
It is carried out under the condition of 20Kg/crA.

(Function) The heat-resistant resin layer on the surface of the decorative paper is completely cured when it is laminated with the synthetic resin-impregnated paper, so even if a mirror belt, etc. comes into contact with it during lamination, the mirror belt, etc. will not touch the surface of the resin layer. There is no transfer of surface shape. Further, the thermosetting resin applied by heating and pressing permeates into the decorative paper and then hardens, so that the decorative paper and the synthetic resin-impregnated paper are tightly integrated into one.

(Example) A wood grain pattern was applied to the surface of a rolled base paper weighing 3017/TIl using nitrocellulose ink, and then 30y/Trt of acrylic melamine resin was applied to the surface.
A decorative paper was obtained by applying the coating under dry conditions and curing it for 150'030 seconds. When the heat resistance of this acrylic melamine resin layer was examined, no change was observed even after 7JO heat pressurization at 200'C.

On the other hand, a roll of kraft paper weighing 1409/g was impregnated with a thermosetting polyester resin using benzoyl peroxide as a curing agent to an impregnation rate of 70%.
A paper impregnated with a synthetic resin was obtained by curing under the condition of 10'J/c scrap.

Next, apply 30% polyester resin to one side of the synthetic resin-impregnated paper.
9/ Apply crj coating 1, then layer the decorative paper on top of it continuously with the acrylic melamine resin coated side facing up.
Laminated sheets 1 to 1 were obtained by continuously heating and pressing at 150'C for 10 seconds.

(Effects of the invention) ■It is easy to maintain and manage the parts of the mirror belt that come into contact with the surface of the decorative paper.

■Force 11 When laminating with heat and pressure, only the applied thermosetting resin layer is cured, so curing is completed in a shorter time than conventional products.

[Brief explanation of drawings]

The drawings provide a detailed explanation of the present invention, and FIG. 1 is an explanatory diagram showing a state in which decorative paper and synthetic resin-impregnated paper are laminated;
FIG. 2 shows cross-sectional views showing the groove structure of the decorative paper used in the present invention. (1)...Base paper (2)...Pattern (3)...Heat-resistant resin layer (4>...
・・・Cosmetic paper

Claims (1)

[Claims] A continuous decorative paper with a heat-resistant resin layer formed on the surface and a cured continuous synthetic resin-impregnated paper are placed with the surface on which the heat-resistant resin layer is formed on the outside, and a thermosetting paper is prepared. A method for manufacturing a laminated sheet, characterized by continuously laminating layers while heating via a resin.