JPS6319344B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shaped film for producing a polyester decorative board having an uneven pattern on its surface.

Conventionally, the forming film for polyester decorative laminates is made by applying unevenness in the desired shape to a single film such as polyester film or vinylon film and then using it for embossing the decorative laminate. Vinylon film is difficult to hot-press, and it is difficult to reproduce fine irregularities.

In addition, instead of embossing the film by heat and pressure as described above, some methods have been used in which unevenness is created by bulges of resin.

However, in this case, the number of times of repeated use is small, and it is in a state where it can be used only once or at most several times. The number of times of repeated use is an important factor that influences the cost of a shaped film. Furthermore, the suitability of the molded film for frame attachment during the production of polyester decorative boards is also an important factor since it affects workability and the number of times of repeated use.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a shaped film that can be easily pasted onto a frame and that can be used repeatedly several dozen times.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a film 1 having releasability, which serves as the base of the molded film of the present invention, and a shrinkable resin 2 for forming recesses. The film 1 having mold releasability may be any film as long as it has mold releasability against polyester resin, and vinylon film, polyester film, cellophane film, polyfluorinated vinyl film, nylon film, polypropylene film, etc. can be used; however, due to cost, Vinylon film is most suitable from the viewpoint of workability such as suitability for frame pasting, and behavior that is integrated with the shrinkage of the resin as described later. Of course, depending on the degree of unevenness, the above-mentioned films other than vinylon film can also be used.

The shrinkable resin (2) can be arbitrarily used as long as it itself shrinks in some way. For example, a cured shrink type resin, a heat shrink type resin, etc. can be used. As curing and shrinking type resins, most resins such as unsaturated polyester resins, acrylic melamines, epoxy polyamides, epoxy melamines, amino alkyds, urethane resins, and photocurable acrylic resins can be used.

Particularly in relation to vinylon film, high-temperature curing resins cause the vinylon film to become dehydrated during heat treatment, making subsequent polyester processing difficult, so it is desirable to use resins that cure at as low a temperature as possible. For example, moisture-curing urethane resins and two-component urethane resins that harden even at room temperature can shrink without causing deterioration of the vinylon film.
Easy to use.

Film 1 that has releasability with this shrinkable resin (2)
When a pattern is applied to one side of the film and then the shrinkable resin (2) is contracted by heating or other methods, the part of the film to which the resin is applied also behaves in unison with the contraction of the resin, resulting in shrinkage. The resin 2 is now in a state where the film with releasability has been pushed out to the opposite side, and the second
The resulting film has irregularities as shown in the figure.

Possible methods for forming the shrinkable resin pattern on the releasable film 1 include gravure printing, silk screen printing, rotary screen printing, flexographic printing, and offset printing. Further, at this time, the resin may or may not be colored.

Also, if the adhesion between the film and the shrinkable resin is poor,
Apply primer to the film and make it adhere.

The imprinted film 3 obtained in the above manner is
As shown in FIG. 3, when producing a polyester decorative board, the patterned side is placed on top of the unsaturated polyester resin layer 7, and the surface in contact with the unsaturated polyester resin becomes the surface of the film 1 having mold releasability. After the unsaturated polyester resin is cured, it is peeled off.

The method for manufacturing the polyester decorative board includes using lauan plywood, particle board, hardboard, star wood, inorganic noncombustible board, etc. as the base material 4, and applying colored titanium paper, titanium paper with a printed pattern, etc.
A sheet 5 such as thin paper decorative paper, decorative PVC sheet, patterned synthetic paper, etc. is pasted, an unsaturated polyester resin 7 is applied thereon, and the above-mentioned imprinting film 3 is layered on top of the sheet 5, using a normal film method. The polyester resin is thus cured and then released from the mold.

Since this molded film is made of only a film surface that has releasability, its releasability and durability, such as the number of repeated uses, are almost the same as those produced when producing regular flat polyester decorative boards. have sex. Furthermore, if a curable resin is used as the shrinkable resin, the unevenness will not lose its shape.

Furthermore, the method for attaching the frame may be the same as that used in the production of ordinary polyester decorative boards, and no special method is required.

The irregularities formed on the imprinted film can be arbitrarily selected, such as wood grain conduits, cloth grains, stone grains, and other texture patterns, but from the point of view of shrinkage of the resin and film, fine or thin ones are more likely to be sharpened than large ones. The effect is good.

The molded film obtained in the manner described above has fine irregularities formed thereon, and is excellent in the number of repeated uses, mold releasability, suitability for frame attachment, etc., and has good workability when manufacturing polyester decorative boards, and is suitable for use in decorative boards. This is extremely useful for cost reduction.

〔Example〕

The printing depth is 40μ on the glossy side of 25μ thick transparent single-sided matte vinylon film (manufactured by Tokyo Cellophane Co., Ltd.).
Using a wood grain conduit pattern gravure plate, a conduit pattern was printed using a two-component curing urethane ink (manufactured by Toyo Ink Manufacturing Co., Ltd.).

Next, the film was wrapped in polyethylene film and heated at 60°C for 72 hours to cause the urethane ink to shrink, creating a shaped film.

On the other hand, titanium paper with a basis weight of 80 g/m ² with a zelkova grain pattern printed on it was pressed onto 2.7 mm thick lauan plywood using adhesive, and the unsaturated polyester resin
MEK- for KC-34 (manufactured by Dainippon Ink & Chemicals Co., Ltd.)
A resin mixed with a portion of PO (manufactured by Nippon Kayaku Co., Ltd.) is applied to a coating amount of 200 g/m ² , and the above-mentioned molded film is coated with a polyester resin on the matte vinylon film surface. After bringing them into close contact, the polyester resin was cured using a conventional film method.

When the molded film was released from the mold after curing, a polyester decorative board was obtained on which the conduit portion was recessed in the pattern of a zelkova pattern on printed paper.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, in which Fig. 1 shows a film with releasable properties and a pattern formed on one side with a shrinkable resin, and Fig. 2 shows a molded film by shrinking the resin. FIG. 3 is a cross-sectional view showing the process of manufacturing a polyester decorative board using the shaped film. DESCRIPTION OF SYMBOLS 1... Film having releasability, 2... Shrinkable resin, 3... Shaping film, 4... Base material, 5...
Sheet, 6...Pattern, 7...Unsaturated polyester resin.

Claims (1)

[Claims] 1 A desired pattern is applied to one side of a film that has releasability for transparent or translucent polyester resin using a resin that shrinks when dried or cured, and then the resin is dried or cured to shrink. Therefore, there is provided a material for polyester decorative laminates, which is characterized in that only the resin-applied portion of the film is bulged on the opposite side to the pattern-applied side to form an uneven surface. Method of manufacturing mold film.