JPS63162239A - Manufacture of laminate with cured resin layer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention utilizes heat during lamination when laminating a sheet with a thermosetting resin layer onto another plate-shaped base material. The present invention relates to a method for producing a laminate having a cured resin layer, in which a thermosetting resin layer is cured.

[Conventional technology]

Conventionally, when laminating another base material on top of another base material and forming a thermosetting resin layer on top of it, an uncured layer of thermosetting resin is previously provided on the surface of the upper base material. The method used is to allow the material to harden sufficiently and then laminate it with the underlying substrate.

[Problem that the invention seeks to solve]

However, curing a thermosetting resin layer requires high temperatures and a long time, and the drying equipment that comes with a normal coater is provided solely for the purpose of drying, so using a coater alone is not sufficient. Hardening cannot be performed, and on the contrary,
If sufficient curing is to be achieved, the coating speed will be slow (this will require drastic changes in the drying properties and viscosity of the paint).
The properties of the paint that can be applied with a coater are outside the range.

Also, because it requires high temperature and long time for curing,
As a base material, materials with low heat resistance, especially plastic films of -a, cannot be used in practice.

Therefore, the problem to be solved by this invention is that when producing a laminate body having a cured resin layer, the coating process for thermosetting resin was conventionally carried out using a normal coater and a paint with properties suitable for the coater. This is something that cannot be done.

[Means for solving problems]

In this invention, the problem can be solved by laminating using heat and by using the heat at that time to also cure the thermosetting resin layer on the surface.

That is, in the present invention, an uncured layer of thermosetting resin is provided on one surface of the first base ladle, and the first and second base materials are placed on the opposite surface thereof. By heating and pressurizing the base material, the first
A method for manufacturing a laminate having a cured resin layer, which comprises laminating a second base material and curing an uncured layer of thermosetting resin on one side of the first base material. J
The main points are as follows.

[Effect]

In this invention, instead of curing the thermosetting resin in advance, it is simply dried and solidified without curing in the previous stage, and the curing is performed using the heat during the next lamination. , there is no need to heat it for a long time after application. Further, since the coating is simply dried without curing immediately after application, even a base material with low heat resistance will not receive excessive heat to the extent that it causes thermal deformation.

〔Example〕

Hereinafter, this invention will be specifically explained based on examples.

The first and second base materials used in this invention are basically made of the following materials: tissue paper, bleached kraft paper, titanium paper, linter paper, paperboard,
Paper such as gypsum board paper, polyethylene film, polypropylene film, polyvinyl chloride film, polyvinylidene chloride film, polyvinyl alcohol film, polyethylene terephthalate film, polycarbonate film, nylon film, polystyrene film, ethylene-vinyl acetate copolymer film , ethylene-vinyl alcohol copolymer film, ionomer, or other plastic films, or sheets of these plastics.As plastic panels, AAS resin, ABS resin,
Cellulose resins such as AC3 resin, amino resin, cellulose acetate resin, cellulose butyrate acetate, ethyl cellulose,
Allyl resin, ethylene-α-olefin copolymer, ethylene-vinyl acetate-vinyl chloride copolymer, ethylene-vinyl chloride copolymer, ethylene, vinyl acetate copolymer, ionomer, MBS resin, methacrylic-styrene copolymer , nitrile resin, phenolic resin, polyamide resin,
Polyacrylate resin, polycarbonate resin, polybutadiene resin, polybutylene terephthalate resin, polyethylene resin, polyethylene terephthalate resin, polymethyl methacrylate resin, polypropylene resin, polyphenylene oxide resin, polystyrene resin, AS resin, polyurethane resin, polyvinyl chloride resin, acrylic modification Plastic panels such as polyvinyl chloride resin and unsaturated polyester resin, wood base materials such as wood, plywood and verticle board, gypsum base materials such as gypsum board and gypsum slag board, pulp cement board, asbestos cement board, Fiber cement boards such as wood cement boards, GRC and concrete, metal foils or sheets of iron, aluminum, copper etc.

Any of the above materials may be used for the first and second base materials, but in most cases, the first base material is a relatively thin material such as paper, plastic, or metal foil. , second
An example of this is a case where the base material is a relatively thick plate.

Examples of the thermosetting resin applied to the first base material include phenol resin, urea resin, melamine resin, unsaturated polyester resin, polyurethane resin, amino alkyd resin, melamine-area cocondensation resin, and diacryl phthalate resin. A resin liquid whose main component is a thermosetting resin such as a thermosetting resin, a silicone resin, or an initial condensate thereof is used.

If necessary, the thermosetting resin is diluted to a viscosity suitable for coating, and then coated with a known coating method such as roll coating, gravure coating, barcode coating, air knife coating, flow coating, dip coating, or spray coating. Apply by coating or other methods.

At the time of application, it is dried using, for example, a drying device attached to Coke. This drying is performed by air-drying or by slightly heating, but the degree of heating is sufficient to evaporate the solvent contained in the paint when applying the thermosetting resin. The heating temperature is about 25°C to 200°C, preferably 40°C to 120°C, depending on the coater and the curing start temperature of the thermosetting resin used.

In this way, the second base material is placed on the opposite side (non-coated surface) of the first base material coated with the thermosetting resin, and the two are heated and pressurized to perform lamination.

Heating and pressurization are performed using a hot press such as a flat press or a roll press, and the first base material provided with the thermosetting resin layer is stacked on one or both sides of the second base material,
This is done using a mirror plate, matte plate, template, etc. to adjust the gloss of the finished surface of the final product as necessary. At this time, the adhesive can be applied to the first base material, the second base material, or both.

Adhesives include rubber resins such as polyisobutylene rubber, polyisobutyl rubber, styrene butadiene rubber, butadiene acrylonitrile rubber, (meth)acrylic acid ester resins, polyvinyl ether resins, polyvinyl acetate resins, and vinyl chloride. -vinyl acetate copolymer resin,
Any adhesive resin such as polystyrene resin, polyester resin, polyamide resin, polychlorinated olefin resin, polyvinyl butyral resin, etc. can be used. Furthermore, various additives such as a curing agent, a filler, and an anti-aging agent can be added as necessary.

In this case, if necessary, pretreatment to improve adhesion such as primer treatment or corona treatment can be performed.

Alternatively, when laminating a polyvinyl chloride plate and a polyvinyl chloride film or an acrylic film, the lamination can be carried out by hot melting without using an adhesive.

For example, the heat press is performed at a temperature of about 80 to 200°C, 20 to 200°C.
The hot pressing is carried out at a pressure of about 80 kg and 7 cm, and the hot pressing time is about 5 to 40 minutes.

However, at a temperature of 140-180℃, 30-50Kg/
cIIl! Heat press for 10-30 minutes at a pressure of 10-2
It is preferable to use a method of cooling for about 0 minutes in terms of the appearance and physical properties of the resulting product.

Other methods of lamination include using a molten resin extruded from a T-die as an adhesive, or by using this as the first base material and using a roll after extrusion. With this method, lamination can be carried out continuously and efficiently. Also, at this time, the adhesive surfaces of the first and second base materials may be pretreated if necessary.

〔effect〕

In this invention, a thermosetting resin layer is provided on a first base material, and the uncured layer is simply dried and then laminated with a second base material, and cured by heat during lamination. There is no problem in applying the thermosetting resin, and the second
Even if a material with low heat resistance is used as the base material, excessive heat is not applied during drying, so there is an advantage that deterioration due to heat such as thermal deformation does not occur.

More specific examples of this invention are listed below.

[Example 1] Polyethylene terephthalate film with a thickness of 25 μm (
Using a thermosetting resin (polyvinyl alcohol resin containing melamine resin as a crosslinking agent, manufactured by Daiichi Shoko ■), which has an anti-fog function after complete curing, is coated on one side using the gravure coating method. It was coated to a thickness of 4 μm and dried at a temperature of 100° C. for 2 minutes.

In this state, the antifogging effect was not exhibited because it was not cured.

Next, a modified polyester resin (manufactured by Showa Ink ■) was applied as a heat-sensitive adhesive to the non-coated surface of the above film to a thickness of 2 μm.
Apply it and let it dry.

The product obtained above was placed on a 5 mm thick non-plastic vinyl chloride resin plate with the heat-sensitive adhesive layer side facing down, and pressed through a mirror plate. The pressing conditions at this time were that the surface temperature of the press hot plate was 170° C. and the pressure was 30 Kg/cm. After pressing under these conditions for 15 minutes, cooling time was taken for 20 minutes, and then the finished product was taken out.

The thermosetting resin on the surface of the obtained product was cured, and an antifogging effect was exhibited.

The anti-fog effect here means that if 60°C hot water is poured into a beaker and the test object is placed over the beaker so that the side on which the anti-fog effect is to be checked is facing the beaker, no fogging occurs for 60 seconds. It is judged that the person has 45 abilities.

Claims (2)

[Claims] (1) An uncured layer of thermosetting resin is provided on one side of the first base material, and the first and second base materials are heated so that the second base material is on the opposite side. and a cured resin layer characterized by laminating the first and second base materials and curing the uncured layer of thermosetting resin on one side of the first base material by applying pressure. A method for manufacturing a laminate body. (2) A method for manufacturing a laminate body having a cured resin layer according to claim 1, wherein the first base material is laminated on both surfaces of the second base material.