JPH0356360Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a laminate for building materials, and more particularly to a laminate for building materials having excellent surface properties and adhesive properties.

Metals, resins, ceramics, wood, etc. are used as building materials, due to their excellent properties and workability.
Widely used for fittings, industrial materials, etc.

However, many of these materials do not have sufficient design properties, surface properties, paintability, adhesive properties, etc.

Therefore, as a method to improve these problems, pasting fibers onto these base materials has been carried out.

Conventionally, thermosetting liquid adhesives, solution-based adhesives, or emulsion-based adhesives have generally been used to attach these fibers.

However, with these methods, the process for applying the adhesive is complicated, equipment costs and processing costs are high, and there are problems such as pollution caused by solvents and waste liquids in the adhesive and deterioration of the working environment. It has many drawbacks.

Furthermore, the fibers used for surface adhesion generally have high liquid absorption properties, and therefore have the disadvantage of requiring a large amount of expensive adhesive.

As a result of various studies to eliminate these drawbacks, the inventors of the present invention used a modified polyolefin resin containing an unsaturated carboxylic acid or its derivative as a comonomer as an adhesive layer. We discovered that by laminating cotton cloth on a metal base material via this modified polyolefin resin, a laminate with excellent adhesiveness, surface properties, and adhesiveness can be easily obtained. Based on this knowledge, we have completed the present invention.

That is, the present invention relates to a laminate for building materials, which is formed by laminating cotton fabric on a metal base material via a modified polyolefin resin containing an unsaturated carboxylic acid or a derivative thereof as a comonomer.

The present invention will be explained below with reference to the drawings.

In the present invention, metals such as aluminum, iron, stainless steel, copper, nickel, galvanized iron, and tin plate are used as the base material 1.

Here, as the shape of the metal that is the base material 1, any shape can be selected from a molded body, a plate-shaped body, a foil, or a film.

The metal used as the base material 1 in the present invention has a highly smooth surface, making it difficult to attach or paint other materials as a secondary material, and it is also a base material with poor design. According to the present invention, these problems can be solved.

Next, cotton cloth 2 is used in the present invention. Here, cotton fabrics include woven fabrics, non-woven fabrics, knitted fabrics, etc. made of cotton, and their forms vary depending on the desired surface properties.
Can be used arbitrarily, from thin to thick.

In the laminate for building materials of the present invention, the base material 1 and the cotton cloth 2 described above are laminated and bonded using a specific polyolefin resin 3.

The modified polyolefin resin 3 used in the laminate for building materials of the present invention is a copolymerized or It means a copolymer obtained by graft polymerization.

Examples of the unsaturated carboxylic acid that is a copolymerization component include acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, crotonic acid, citraconic acid, sorbic acid, mesaconic acid, and angelic acid.

Further, its derivatives include acid anhydrides, esters, amides, imides, metal salts, etc., such as maleic anhydride, itaconic anhydride, citraconic anhydride, methyl acrylate, butyl acrylate, maleic acid monoethyl ester, acrylamide,
Examples include maleic acid monoamide, maleimide, N-butylmaleimide, sodium acrylate, sodium methacrylate, and zinc methacrylate.

The method for producing these modified polyolefin resins is not particularly limited, and known methods can be applied.

For example, an ionomer resin obtained by copolymerizing ethylene and sodium methacrylate or zinc methacrylate, or a polyolefin or polyolefin copolymer and maleic anhydride, etc., is combined with a radical initiator in the presence or absence of a solvent. There are graft copolymers obtained by adding and heating.

In addition, in the graft copolymer, other vinyl monomers such as styrene, diene copolymers, etc. can also be made to coexist during the reaction.

The polyolefin raw material used in the graft copolymerization is not particularly limited and may be appropriately selected depending on the purpose of use. Specifically, high density polyethylene, medium density polyethylene, low density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-1-butene copolymer, ethylene-4-methylpentene-1 copolymer, ethylene-
Examples include vinyl acetate copolymer, saponified ethylene-vinyl acetate copolymer, and linear low-density polyethylene.

The content of the unsaturated carboxylic acid or its derivative in this modified polyolefin resin is usually in the range of 0.001 to 50% by weight, preferably 0.005 to 15% by weight.

The modified polyolefin resin used as the adhesive layer of the present invention does not necessarily have to be entirely modified, and may be blended with an unmodified polyolefin resin, in which case the polyolefins are of the same type. may also be different. In this case, if necessary, rubber or other resins may be blended, and inorganic fillers such as talc, calcium carbonate, and silica, stabilizers, etc. may be added.

Next, various methods can be employed for manufacturing the laminate for building materials of the present invention.

For example, a method is employed in which a film of the modified polyolefin resin 3 and the cotton cloth 2 are superimposed on the base material 1 and bonded under heat using a roll or press, a method by extrusion lamination, or a method in which the modified polyolefin resin 3 is preliminarily applied to the cotton cloth 2 or the base material 1. There are methods such as thermo-compression bonding or lamination of the remaining layer on top of the laminated layer.

In the laminate for building materials of the present invention, it is possible to obtain a laminate with the desired surface condition by appropriately selecting the types and thicknesses of the modified polyolefin resin 3 and cotton cloth 2, molding temperature, molding pressure, etc. A great feature is that it can be done. That is, it is possible to freely obtain a material whose surface is made only of cotton cloth, a material in which a portion of the cotton material is coated with polyolefin, a material in which the entire cotton material is covered with polyolefin, and the like.

As described in detail above, the laminate for building materials of the present invention is easier to manufacture, cheaper, and has excellent adhesive properties than those using conventional liquid adhesives.

Furthermore, whereas conventional adhesives are simply attached, the present invention allows a laminate with surface properties that suit the purpose to be obtained by selecting materials and molding conditions.

Therefore, the laminate is excellent in corrosion resistance, heat insulation, etc., and has an excellent design.

In addition, using this surface property, painting, spraying,
Furthermore, it is possible to attach glue, etc., and create secondary decorations.

Moreover, it is also possible to peel off the pasted paper and replace it.

Therefore, the laminate of the present invention can be effectively used as a laminate for building materials such as building materials, fittings, and decorative materials due to the various excellent properties described above.

Hereinafter, the present invention will be specifically explained with reference to Examples.

Example 1 Two cotton cloths were layered on a 0.5 mm thick aluminum plate via a 100 μm thick modified polypropylene film (maleic anhydride addition amount: 0.5% by weight), and heated at 200°C using a press molding machine in a conventional manner. ，
After thermocompression bonding for 1 minute at 80Kg/ ^cm2 , cool it down.
A laminate in which cotton cloth was firmly bonded to an aluminum plate was obtained.

Shoji paper was pasted on the cotton cloth side of the resulting laminate using water-soluble glue, and after drying at room temperature for 24 hours, a peel test was performed on the shoji paper. It was found that it has adhesive properties.
Furthermore, by washing with water, the shoji paper and glue could be easily removed, and the surface of the laminate remained unchanged from before the paper was pasted.

Example 2 The procedure of Example 1 was followed except that a modified high-density polyethylene film having a thickness of 100 μm (added amount of maleic anhydride: 0.4% by weight) was used to obtain a laminate in which cotton cloth was firmly bonded to an aluminum plate. .

The adhesiveness to paper and the washability of the obtained laminate were the same as in Example 1.

Comparative Example 1 Water-soluble glue was applied to an aluminum plate with a thickness of 0.5 mm, shoji paper was attached to the plate, and after drying at room temperature for 24 hours, a peel test of the shoji board was conducted, and no adhesiveness was observed.

Comparative Example 2 A laminate was obtained according to Example 1 except that an unmodified polypropylene film having a thickness of 100 μm was used, but there was no adhesiveness between the aluminum plate and the polypropylene film at all.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the laminate for building materials of the present invention. 1...Base material, 2...Cotton cloth, 3...Modified polyolefin resin.

Claims (1)

[Scope of utility model registration request] A laminate for building materials comprising a base material made of metal and cotton fabric laminated via a modified polyolefin resin containing an unsaturated carboxylic acid or a derivative thereof as a comonomer.