JPH02209236A - Patterned molded body - 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 Field of Industrial Application The present invention relates to a molded article with a handle that can be used as a material for bathtubs, bathroom wall materials, counters, waterproof pans, and other building materials.

BACKGROUND OF THE INVENTION Conventionally, fiber-reinforced plastics using unsaturated polyester resins have been used for bathtubs, ships, tanks, and the like. On the other hand, in plastic materials using unsaturated polyester resin, powders such as calcium carbonate, hydrated alumina, and clay can be used as fillers to improve performance and increase the amount, or finely powdered silica, finely divided It is known to use powdered mica or the like. These have been used simply for the purpose of increasing mechanical strength or improving performance. However, in recent years, there has been a strong demand for structures that are suitable for aesthetic purposes and various other uses, and various laminated structures using fiber-reinforced plastics are being considered. for example,
A laminated structure was invented that uses transparent resin concrete hardened with unsaturated polyester resin to prevent warping of molded objects and cracks at corners.
0-49426). Furthermore, a molded body made of resin concrete has been devised in which a pattern layer and a gel coat layer are successively laminated on the surface side of the surface side reinforcing layer (1986).
3-125530).

Problem to be Solved by the Invention When an inorganic substance or a metal of a certain size that is not in powder form is added as a filler for the purpose of adding a pattern or the like, the filler is not uniformly dispersed in the unsaturated polyester resin. However, there was a problem that it settled and became non-uniform.

On the other hand, if the weight of the filler is reduced too much, there is a problem in that it floats on the unsaturated polyester resin. Furthermore, molded products made by mixing granular materials as fillers into unsaturated polyester resins have low mechanical strengths such as tensile strength and bending strength, so they must be reinforced in some way to be used in various practical applications. It needed to be durable for its intended use. Furthermore, the design does not impair the aesthetic appearance.

The challenge was to add patterns etc.

Means for Solving the Problems The present invention takes into account the above-mentioned conventional problems, and forms a surface layer by molding a reinforcing layer made of transparent fiber-reinforced plastic on the back side of a transparent gel coat layer. A back layer made of fiber plastic is formed through the layers and gaps,
a liquid thermosetting resin in the gap between the surface layer and the back layer;
This is a molded article with a handle formed by injecting and curing a mixed liquid of a colored scale-like filler.

Effect In the above configuration, the scale-like filler is a liquid thermosetting resin,
For example, it becomes possible to substantially uniformly disperse it in an unsaturated polyester resin without sedimentation in the unsaturated polyester resin. This is because the bulk density of the scale-like filler is smaller than that of ordinary spherical particles, and its sedimentation in the unsaturated polyester resin is weakened.

Furthermore, it is clear that the unsaturated polyester resin layer itself containing the scaly filler has improved mechanical strength compared to spherical particles. In addition, the tensile strength of the molded product is improved by the reinforcement layer made of fiber-reinforced plastic and the gel coat layer applied to the surface of the unsaturated polyester resin layer containing the scale-like filler, and the reinforcement layer made of fiber-reinforced plastic applied to the back side. It is possible to obtain a molded body having a laminated structure that has high mechanical strength such as bending strength and impact strength and is satisfactory for practical use.

On the other hand, due to the reinforcing layer made of transparent fiber-reinforced plastic and the gel coat layer made of transparent resin applied to the surface of the unsaturated polyester resin layer containing scale-like substances, particulate matter can be seen through these two layers. be able to.

Therefore, various designs can be realized by changing the color, shape, etc. of the scaly material.

Example Embodiments of the present invention will be described below with reference to FIG.

As shown in the figure, the patterned molded body of this example has a surface layer 3 made of a reinforcing layer 2 made of fiber-reinforced plastic molded on the back side of a transparent gel coat layer 1, and a surface layer 3 with a gap in between. It consists of a back layer 4 made of fiber plastic and an unsaturated polyester resin layer 6 injected between the front layer 3 and the back layer 4 and cured. Colored scaly fillers 6 are dispersed in the unsaturated polyester resin layer 6.

The scale-like filler contained in the unsaturated polyester resin layer is
It is preferable that the amount of the unsaturated polyester resin is in a proportion of more than 1 part by weight and not more than 40 parts by weight per 100 parts by weight of the unsaturated polyester resin. If the amount is less than 1 part by weight, the influence of resin shrinkage etc. will be large, which is not preferable. 40 again
When the amount is more than 1 part by weight, the viscosity of the mixture becomes too high, causing problems in the construction method. These two unsaturated polyester resin layers
In addition to these ingredients, powders such as calcium carbonate, hydrated alumina, and clay, which are commonly used as aggregates, or finely powdered silica, finely powdered mica, etc. are used to improve performance and increase the amount.

The scale-like filler in this example has a particle size of at least 0.5
A layer containing particles of 1 to 30 jill, preferably 80% by weight or more of the particulate matter consisting of particles of 0.6 fi or more. That is, even if the particulate matter contains micron-order fine particles of the same substance, it is within the scope of the scaly filler of the present invention. 0.
61! By using a scale-like filler of n11 or more,
It can be visually determined to be particulate, which increases the design value of patterns, and allows the creation of various patterns. On the other hand, if the average particle diameter of the scaly filler exceeds 3 On, it is not preferable because it interferes with the manufacturing process such as mixing the scaly filler particulate material with the unsaturated polyester resin and injecting the mixture.

A scaly filler coated with a colored pigment can be obtained as follows. By classifying the filler into the desired size, it is possible to obtain uncolored scaly fillers that are uniform in size to a certain extent. The surface of the scale-like filler particulate material is coated with a thermosetting resin such as polyurethane resin or acrylic resin using a pigment of a desired color.

Its thickness is about 0.1 to 100 microns.

If the thickness is less than 0.1 micron, the coloring will be insufficient, and if it exceeds 100 microns, problems such as peeling will occur.

The scale-like filler obtained by this method is.

The colored pigment is strongly adhered only to the surface of the scaly filler.

The reinforcing layer made of transparent fiber-reinforced plastic is made by impregnating the fibers with a transparent unsaturated polyester resin layer using a woven or non-woven glass fiber fabric using a hand lay-up method or a spray-up method. It is something.

The gel coat layer made of transparent resin is made of unsaturated polyester resin such as bisphenol-based or isophthalic acid-based resin which has various properties such as hot water resistance by spray-up method or the like. The above-mentioned transparency of the two layers on the surface of the unsaturated polyester resin layer means that the unsaturated polyester resin layer can be visually seen through these two layers. It is possible to color it to the extent that it does not lose its character.

The reinforcing layer made of fiber-reinforced plastic on the back side is made of fiber-reinforced plastic made of glass fiber or the like impregnated with unsaturated polyester resin.

Specific examples and comparative examples will be described below.

Example 1 A gel coat resin made of bisphenol-based transparent unsaturated polyester resin was applied to a thickness of 0.50. After that, a reinforcing layer made of fiber-reinforced plastic made of glass fiber non-woven fabric and a transparent unsaturated polyester resin layer is laminated by the nodry-up method to a thickness o, s t.
n), a surface layer was created.

On the other hand, as a back layer, a reinforcing layer made of fiber-reinforced plastic made of iso-unsaturated polyester resin and glass fiber was prepared by a hand lay-up method. A mixture of 100 parts by weight of unsaturated polyester resin and the following ratio was injected between the surface layer and the back layer.

Black pigment coated mica 1 part by weight (average particle size 1ff) Uncolored mica 1 layer part by weight (average particle size 1 gm) Brown pigment coated mica 2 parts by weight (average particle size 1 m) Calcium carbide 100 parts by weight (average particle size 1 m) ) Mica bulk specific gravity 0.
4 Here, mica was used as the scaly filler. After mixing these, a curing agent and a curing accelerator were added, and the mixture was poured into a mold and cured. When mica was dispersed as a scaly filler in an unsaturated polyester resin, surprisingly, the mica was almost uniformly dispersed in the unsaturated polyester resin without sedimentation. By applying a reinforcing layer made of fiber-reinforced plastic and a gel coat layer on the surface of the unsaturated polyester resin layer containing mica, and providing a reinforcing layer made of fiber-reinforced plastic on the back side, the molded product has high mechanical properties such as tensile strength and bending strength. It was possible to obtain a molded article having a laminated structure that has high mechanical strength and is satisfactory for practical use.

By laminating a reinforcing layer made of transparent fiber-reinforced plastic and a gel coat layer made of transparent resin on the surface of an unsaturated polyester resin layer containing mica as a scale-like filler, the scale-like appearance is created through these two layers. I could see the filling material.

Therefore, it was possible to realize a decorative pattern by changing the color and shape of the scale-like filler. For example, it was also possible to create patterns similar to natural granite.

Example 2 A gel coat resin made of isophthalic acid-based unsaturated polyester resin was applied to a thickness of 0.38.

Thereafter, a reinforcing layer made of fiber-reinforced plastic with a non-woven glass fiber fabric and a transparent unsaturated polyester resin layer is laminated by hand lay-up to a thickness of 1. off), a surface layer was created.

On the other hand, as a back layer, a reinforcing layer made of fiber-reinforced plastic made of iso-unsaturated polyester resin and glass fiber was prepared by a hand lay-up method. A mixture of 100 parts by weight of unsaturated polyester resin and the following ratio was injected between the surface layer and the back layer.

Black pigment coated mica 6 parts by weight (average particle size 6 rt
yt) Uncolored mica 8 parts by weight (average particle size s
ttrx) Brown pigment-coated mica 1 part by weight (average particle size ts tm ) Aluminum hydroxide 100 parts by weight (average particle size 1 m) Mica bulk specific gravity 0.3 After mixing these, a curing agent and a curing accelerator were added.

It was poured into a mold and allowed to harden. The thus obtained molded article having a laminated structure gave the same results as in Example 1 and was satisfactory.

Comparative Example 1 A gel coat resin made of isophthalic acid-based unsaturated polyester resin was applied to a thickness of 0.50.

Thereafter, a reinforcing layer made of fiber-reinforced plastic mounted with a glass fiber non-woven fabric and made of a transparent unsaturated polyester resin layer was laminated by a hand lay-up method to form a surface layer having a thickness of o, 5xx).

On the other hand, as a back layer, a reinforcing layer made of fiber-reinforced plastic made of in-based unsaturated polyester resin and glass fiber was prepared by hand lay-up method. A mixture of 100 parts by weight of unsaturated polyester resin and the following ratio was injected between the surface layer and the back layer.

Natural black pebbles 30 parts by weight (average particle size 1ff) Natural white pebbles 30 parts by weight (average particle size 1 gg) Natural brown pebbles 10 parts by weight (average particle size 1 m) Aluminum hydroxide 100 parts by weight (average particle size 1 m) Natural pebbles Specific gravity of 7. After mixing the two, a curing agent and a curing accelerator were added, and the mixture was poured into a mold and cured. In the thus obtained molded body having a laminated structure, the pebbles settled, and only a non-uniform molded body was obtained.

Comparative Example 2 A laminate was prepared in Example 1 without the fiber-reinforced plastic layer on the back side (bending strength 3 KSI/wj).

Comparative Example 3 In Example 1, a laminate without the fiber-reinforced plastic layer on the surface was prepared (flexural strength 3 Ky/a).

Comparative Example 4 In Example 1, a laminate without the fiber-reinforced plastic layer on the back and front surfaces was produced (bending strength 2/-).

Comparative Examples 2 to 4 had low mechanical strength and were not suitable for practical use. On the other hand, the laminates of Examples 1 and 2 had sufficient mechanical strength (bending strength of 10/-) and could withstand practical use.

Effects of the Invention As is clear from the description of the above examples, according to the present invention, when the scaly filler is dispersed in a liquid thermosetting resin such as an unsaturated polyester resin, the scaly filler settles. This makes it possible to almost uniformly disperse the liquid thermosetting resin in the liquid thermosetting resin.

Furthermore, by providing a reinforcing layer made of fiber-reinforced plastic and a gel coat layer on the surface of the thermosetting resin layer containing the scale-like filler, and providing a reinforcing layer made of fiber-reinforced plastic on the back side, the molded product has mechanical strength. It is possible to obtain a molded body with a laminated structure with a large and practically satisfactory structure, and a reinforcing layer made of transparent fiber-reinforced plastic and a gel coat layer made of transparent resin are formed on the surface of a thermosetting resin layer containing a scale-like filler. By layering these two layers, particulate matter can be seen through these two layers.

The design also becomes better.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing the laminated structure of the molded article with handle of the present invention. 1...Gel coat layer, 2...Reinforcement layer,
4... Back layer, 6... Unsaturated polyester resin layer, 6... Scale-like filler. Name of agent: Patent attorney Shigetaka Awano and 1 other person 1st
f! iH -1 -1- 6-・- Kelcoat coral W3 layer Surface layer Back layer Positive W! Cap Polyester Grease Field M Square Filling Nail

Claims (4)

[Claims] (1) A reinforcing layer made of transparent fiber-reinforced plastic is molded on the back side of the transparent gel coat layer to form a surface layer, and a back layer made of fiber-reinforced plastic is molded through a gap with this surface layer. and a molded article with a handle, which is obtained by injecting and curing a liquid mixture of a liquid thermosetting resin and an uncolored or colored scale-like filler into the gap between the surface layer and the back layer. (2) The liquid thermosetting resin is an unsaturated polyester resin,
2. A molded article with a handle according to claim 1, wherein the scale-like filler is filled in a proportion of at least 1 part by weight but not more than 40 parts by weight per 100 parts by weight of the unsaturated polyester resin. (3) The scale-like filler has a maximum diameter of at least 0.5 mm
The molded article with handle according to claim 1 or 2, which has a length of 30 mm or more. (4) The molded article with a handle according to claim 1 or 2, wherein 80% by weight or more of the scale-like filler consists of particles of 0.5 mm or more.