JPH0149607B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a light-transmitting curved decorative body suitable for use in curved ceilings, arcades, domes, etc.

Conventionally, to obtain this type of decorative body, a sealed mold having the shape of the decorative body as a cavity is used, and a heat-curable synthetic resin liquid that hardens after curing is injected into the cavity, cured, and then removed from the mold to produce the product. It was. However, in this method, the production cost of the sealed mold itself is high, and the work of injecting synthetic resin liquid into the sealed mold and the work of opening and closing the sealed mold during demolding and assembly are troublesome.

The present invention eliminates the drawbacks of such conventional methods,
It is an object of the present invention to provide a method for easily manufacturing an inexpensive light-transmitting curved decorative body.

That is, the method for producing a light-transmitting curved decorative body of the present invention involves coating a mold with a heat-curable synthetic resin liquid that exhibits flexibility after curing, gelling or curing it to form a flexible layer, and then A heat-curable synthetic resin liquid that hardens after curing is coated on the flexible layer, and the surface of the coated resin liquid is further covered with a flexible mold, and then the resin liquid is gelled to form a gelled layer. Then, this flexible laminate is placed on a shaping mold and shaped, and then the uncured portions are cured.

The heat-curable synthetic resin liquid that exhibits flexibility after curing used in the present invention includes unsaturated polyester resin liquid, epoxy acrylate resin liquid, which has been modified so as to exhibit flexibility without becoming hard after curing, Epoxy resin liquid etc. can be used. Taking a modified unsaturated polyester resin liquid as an example, the synthesis method thereof is as follows: it is synthesized using adipic acid or the like as a saturated dibasic acid.

As the heat-curable synthetic resin liquid that hardens after curing used in the present invention, unsaturated polyester resin liquids, epoxy acrylate resin liquids, epoxy resin liquids, etc., which are usually used in the production of this type of decorative body, can be used. . Cure accelerators, catalysts, fillers, coating materials, dyes, etc. are added as necessary to these heat-curable synthetic resin liquids that harden after curing and to the heat-curable synthetic resin liquids that exhibit flexibility after curing. be able to.

The mold used in the present invention may be a rigid mold made of metal, glass, etc., or may be made of polyester film, polyvinyl fluoride film, polyvinyl chloride film, polyethylene film, polypropylene film, cellophane, or a suitable design can be added to these films. A flexible mold such as a screen-printed mold may also be used. Especially when using screen printed film as a mold,
The screen printed design can be transferred to the resin side that is coated onto it, thus forming a decorative element on the surface. Further, the surface shape of these molds may be a smooth surface, or a surface having a regulated or irregular uneven design formed thereon by appropriate means.

In the present invention, such a mold is coated with a heat-curable synthetic resin liquid that exhibits flexibility after curing, but this coating is simply done by simply pouring the resin liquid and coating it one layer. Alternatively, in order to give a design, the resin liquid may be coated in multiple steps so that the resin liquid is partially different in color as shown in FIG.
As shown in the figure, the resin liquid may be coated in one layer first, and then a resin liquid of a different color may be coated on top of the layer. In addition, in order to increase the strength of the decorative product, a reinforcing material made of glass fiber such as glass cloth, or synthetic fiber such as woven fabric or non-woven fabric such as nylon, vinylon, Tetron, etc., is added to the coat. It may also be embedded in a resin solution.

In the present invention, this coated heat-curable synthetic resin liquid exhibiting flexibility after curing is gelled or cured at room temperature or by heating. (Flexible Layer) Next, a heat-curable synthetic resin liquid that hardens after curing is coated thereon. In this case as well, the same coating mode as the coating of the heat-curable synthetic resin liquid that exhibits flexibility after curing can be used. Next, the surface of this resin liquid is covered with a flexible mold. As the flexible mold used here, one having flexibility such as a film-like mold among those mentioned in the previous mold is used.

Next, the heat-curable synthetic resin liquid, which is surface-coated with a flexible mold and hardens after curing, is gelled at room temperature or by heating. (gelling layer)
After that, the flexible mold/gelling layer/
A flexible laminate consisting of a flexible layer in a gelled or cured state/a mold having flexibility, or a flexible laminate consisting of a flexible mold/gelled layer/flexible layer in a cured state. , placed on a shaping mold made of wood, metal, synthetic resin, etc. that has the desired curved shape, such as two-dimensional or three-dimensional, and is subjected to pressure treatment, etc. to conform to the mold as necessary. Strain and shape. Note that when the flexible laminate is placed on the shaping mold, the surface of the flexible laminate that comes into contact with the shaping mold may be either the front or back surface. Next, after this shaping is completed, the uncured portion is cured at room temperature or by heating. The cured laminate is then demolded and the coated flexible mold is peeled off or not, to produce a product.

In the present invention, a heat-curable synthetic resin solution that exhibits flexibility after curing is used as the first synthetic resin solution to be coated, because the heat-curable synthetic resin solution that becomes hard after curing is coated on the resin. This is to ensure that even if the previously coated lower layer of synthetic resin is cured by the time it gels, it will still exhibit flexibility.

As described above, the method for producing a light-transmitting curved decorative body of the present invention involves the gelation of a heat-curable synthetic resin liquid that exhibits flexibility after curing or the resin during curing, and the heat-curable synthetic resin that exhibits flexibility after curing. When a synthetic resin liquid is gelled, the non-flowability and flexibility of the resin are used to place it on a shaping mold of a desired shape and shape it, so the shaping mold used is conventional. It is extremely economical because only the lower mold of the sealed mold is required. Further, since the present invention uses an open mold, it is easy to work with and has the advantage that decorative elements such as complicated designs can be freely incorporated into the surface or inside of the decorative body.

Embodiments of the present invention will be described below based on the drawings.

Example A cellophane sheet mold 1 having a thickness of 50 μm is spread and placed on a level flat plate 2. On this mold 1, a heat-curable synthetic resin liquid 3A having the following blending ratio A and exhibiting flexibility after curing is drawn in a pattern.

Compounding ratio A: Flexible modified unsaturated polyester resin 100 parts by weight Carbon black (pigment) 5 parts by weight Silica filler 5 parts by weight 6% Cobalt naphthenate (cure accelerator)
0.5 parts by weight methyl ethyl ketone peroxide (catalyst)
1 part by weight Next, on the mold 1, a heat-curable synthetic resin liquid 3B having the following blending ratio B and exhibiting flexibility after curing is poured onto the uncoated portion of the resin liquid 3 to form a design.

Blending ratio B Flexible modified unsaturated polyester resin 100 parts by weight Ultramarine blue (pigment) 0.3 parts by weight 6% cobalt naphthenate (cure accelerator)
0.5 parts by weight methyl ethyl ketone peroxide (catalyst)
1 part by weight Next, the coated heat-curable synthetic resin liquids 3A and 3B that exhibit flexibility after curing are sufficiently gelled, and on top of this, a heat-curable synthetic resin liquid 4 that becomes hard after curing and has the following blending ratio C. and at the same time, the glass fiber matte 5 is added.

Blending ratio C Unsaturated polyester resin 100 parts by weight 6% cobalt naphthenate (cure accelerator)
0.3 parts by weight methyl ethyl ketone peroxide (catalyst)
1 part by weight Subsequently, the surface of the coated resin liquid 4 was covered with a cellophane sheet mold 6 having an uneven design of 50 μm in thickness, and allowed to stand at room temperature for about 5 minutes to gel.

Next, the flexible laminate 8 separated from the flat plate 1 and sandwiched between the cellophane sheet molds 1 and 6 is placed on the curved wooden mold 7 prepared in advance and pressed. and blend it into the wooden mold 7.

Next, the wooden mold was placed in an oven for after-curing at 70°C for about 40 minutes to completely cure the uncured parts.

Next, take it out of the oven, remove it from the wooden mold 7,
A product was obtained by cutting into desired dimensions and peeling off the covered cellophane sheet molds 1 and 6. The resulting product could be used in arcades to produce excellent decorative effects.

[Brief explanation of drawings]

FIGS. 1A to 1D are explanatory views showing an example of the manufacturing process of the present invention, and FIG. 2 is an explanatory view showing another manufacturing aspect of the present invention. DESCRIPTION OF SYMBOLS 1, 6... Cellophane sheet mold, 2... Flat plate, 3A, 3B... Heat-curable synthetic resin liquid exhibiting flexibility after curing, 4... Heat-curable synthetic resin liquid that becomes hard after curing, 5... Glass fiber mat , 7... Wooden mold, 8... Flexible laminate.

Claims (1)

[Claims] 1. A heat-curable synthetic resin liquid that exhibits flexibility after curing is coated on the mold, and is gelled or cured to form a flexible layer. Then, a heat-curable synthetic resin liquid that exhibits flexibility after curing is applied onto the flexible layer. The surface of the coated resin liquid is coated with a flexible mold, the resin liquid is then gelled to form a gelled layer, and the flexible laminate is then molded into a shaping mold. 1. A method for manufacturing a light-transmitting curved decorative body, which comprises placing the decorative body on the surface of the body, shaping the body, and then curing the uncured portion.