JPH043790Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a synthetic resin hollow sheet used as a building material, etc., and specifically relates to a synthetic resin hollow sheet having a blinding effect.

(b) Prior art In general, a transparent synthetic resin hollow sheet is an extrusion integral molded product of a hollow plate-like body 1 made of acrylic resin, polycarbonate resin, vinyl chloride (PVC) resin, etc., as shown in Fig. 1. It consists of two opposing plates 2, 3 facing each other through a space, and a large number of parallel ribs 4, 4 extending in the extrusion direction in this space, and a hollow passage 5 with a width of 3 to 16 mm in the space,
5... are formed in large numbers.

Conventionally, this hollow sheet has excellent heat insulation and heat retention properties, and is transparent, so it can be used as a building material, agricultural material,
Although it is widely used as a material for industrial equipment, it has the disadvantage that when used for bathroom lighting windows, shoji screens, etc., it has a good transparency, so it does not have a blinding effect, and the inside of the bathroom or shoji screen can be seen from the outside.

As a solution to this problem, silica (silicon dioxide) as a matting agent is added to the raw material of the hollow plate-like body 1 itself.
One possible method is to extrude the hollow sheet into a translucent hollow plate by mixing a small amount of titanium white, etc., but this method is not suitable for small-scale production, and the use of a matting agent makes it difficult to extrude the raw material. In addition, there was a risk that the matting agent would be dispersed non-uniformly, and furthermore, the entire surface became opaque after molding, making it impossible to matt only the necessary surfaces.

(c) Purpose of the invention This invention was created in view of the above circumstances.
The objective is to treat the outer surface of the opposing plate of the hollow plate to ensure a blinding effect.

(d) Structure of the invention The structure of this invention consists of two parallel opposing plates in a synthetic resin hollow sheet made of transparent thermoplastic resin integrally formed by extrusion molding, and a direction between these opposing plates in the extrusion direction. The outer surface of at least one of the opposing plates is roughened by applying a transparent paint mixed with a matting agent to give it a frosted glass appearance. This is a hollow sheet made of synthetic resin.

(e) Examples This invention will be described in detail based on the examples shown in the figures below. Note that this invention is not limited thereby.

As shown in Fig. 2, a synthetic resin hollow sheet 6
After the hollow plate-like body 1 is extruded, the entire outer surface of one facing plate 2 of the hollow plate-like body 1 having the same structure as the conventional one is extruded.
It is coated to a thickness of 5 to 20 μm using a transparent paint 7 containing 5 to 10% by weight of silica as a matting agent, and the entire outer surface is roughened to give a frosted glass appearance. This clear paint is made of acrylic resin paint, and if it is diluted with a solvent such as ethyl acetate or methyl ethyl ketone and applied by spraying, then heated in an oven to 80 to 90 degrees Celsius to evaporate the solvent, it will remain semi-permanent on the painted surface. Forms a strong dry film.

Here, examples of dimensions and materials of the hollow plate-like body 1 will be described.

The length, width, and total thickness of the flat hollow plate-like body 1 are 1820 mm to 4000 mm, 910 mm to 2000 mm, and 3 to 30 mm, respectively.
It is 9mm. Also, the wall thickness of parallel ribs 4, 4... is 0.3
~0.6mm, and the pitch is 3.8~9.0mm. On the other hand, the weight of the hollow plate-shaped body 1 is 0.85 to 2.0 Kg/m ² .
Further, as the material for the hollow plate-like body 1, polycarbonate, ABS resin, methacrylic resin, etc. are preferable, and polycarbonate is particularly preferable. Furthermore, the hollow plate-shaped body 1 can be bent and freely formed into various curved plate shapes by heating at 150 to 160°C, and can be pre-dried at 100 to 120°C for 30 to 60 minutes. By doing so, vacuum forming can be performed with the parallel ribs 4, 4, . . . remaining intact. Moreover, it can be easily machined using common plastic processing equipment.

Synthetic resin hollow sheet 6 having the above configuration
is used as a building material, agricultural material, and industrial equipment material that requires insulation and heat retention, especially bathroom lighting windows that require blindfolding, double-paned windows in cold regions, double-walled entrances, gymnasium windows, and indoor swimming pools. Used on roofs, shoji screens, etc., to allow sunlight and other light into the interior, and to hide the inside of bathrooms etc. from the outside by concealing them with a frosted glass facing plate. In addition, the hollow sheet 6 tends to have dust gradually entering and accumulating inside the hollow sheet 6 during use, and it is difficult to remove the dust, and when used for a long period of time, the dust becomes very noticeable and becomes unusable. However, by making the outer surface of the hollow sheet 6 frosted, it is made inconspicuous and long-term use is possible.

By configuring the synthetic resin hollow sheet 6 as described above, it is possible to create a semi-permanent blinding effect (for interior spaces such as bathrooms) without impairing the lightness, heat insulation, and impact resistance that are the characteristics of hollow plate-like bodies. In addition, the parallel ribs are vaguely visible from the outside of the facing plate, highlighting the unique design pattern on the outside of the facing board, and improving the aesthetic value. be able to. In addition, in order to further improve the blinding effect, the entire outer surfaces of both of the two facing plates may be roughened to give a frosted glass appearance, or if necessary, part of the outer surface of the facing plates may be roughened. It may also be made to look like frosted glass.

(f) Effects of the invention By roughening at least one outer surface of the synthetic resin hollow sheet to give it a frosted glass appearance, the lightweight, heat insulating and impact strength of the synthetic resin hollow sheet can be improved. This allows the blindfold effect to be maintained semi-permanently without damage.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional synthetic resin hollow sheet, and FIG. 2 is a perspective view showing an embodiment of the synthetic resin hollow sheet according to this invention. 1... Hollow plate-shaped body, 2, 3... Opposing plate, 4...
Parallel ribs, 5...Hollow path, 6...Synthetic resin hollow sheet, 7...Clear paint.

Claims (1)

[Claims for Utility Model Registration] In a hollow plate-shaped body made of transparent acrylic resin or polycarbonate resin integrally formed by extrusion molding, two opposing plates facing in parallel, and a space extending in the extrusion direction between these opposing plates. , consisting of a large number of parallel ribs that connect both facing plates together, the total thickness of the hollow plate-like body is 3 to 9 mm, and the outer surface of the facing plate is coated with silica and/or titanium white 5 to 10 mm A synthetic resin hollow sheet whose surface is roughened to have a frosted glass appearance by coating with an acrylic resin-based transparent paint mixed with % by weight.