JPS6019658Y2 - bath board - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a bath board.

It is already known that a large number of foamed strings of styrene resin are lined up in parallel and their longitudinal surfaces are fused together to form a single piece of synthetic wood, and that boards made of this wood are used as bath boards. Are known.

This bath board is made of styrene resin, so it won't rot even if it absorbs water, and since it's made of foam, it retains heat, and it feels cold to the touch. It has the following characteristics.

Therefore, it is particularly suitable for making bathtub lids and drainboards for baths.

Although styrene-based resins are exclusively used to make bath panels with the above-mentioned structure, it is said that various styrene-based resins can be used, including styrene homopolymers and styrene copolymers. It is said that either a styrene polymer or a mixed polymer of styrene can be used.

However, in order to create a structure in which foamed string-like materials are fused together, it was not possible to create a structure in which the string-like materials in a single piece of synthetic leather had different compositions.

This is because, if strings of different composition are used, mutual fusion of the strings is not always possible, and new problems arise here in terms of fusion.

Therefore, conventional synthetic wood is based on the premise that all foamed strings have the same composition, and there is no difference in composition between the strings.

The inventor tried using conventional synthetic wood, which is made of foamed strings made of styrene-based resin and made by fusing a number of strings together, as a bath board.

When used as a bathtub lid, if the temperature of the water in the bathtub is heated to near the boiling point, the steam generated in the bathtub will heat the lid, crushing the air bubbles on the surface, and eventually deforming the lid. was there.

Furthermore, when used as a drainboard, pouring bath water over it could cause the arrow board to become deformed.

Therefore, it was necessary to improve this point. This idea is
This is an attempt to improve this point.

This inventor believed that the styrene-maleic anhydride copolymer
We focused on its heat resistance.

The inventor also discovered that when the above copolymer has a composition within the range of composition, it easily foams to form a string-like material, similar to a styrene homopolymer, and that the string-like material It was confirmed that it could be easily fused to a foamed string-like material made of styrene homopolymer.

Furthermore, this inventor placed a foamed string-like material made of the above-mentioned copolymer on a portion that should become the surface of the bath board, and placed a foamed string-like material made of the above-mentioned homopolymer inside the bath board; It was confirmed that deformation was reduced even after contact with water vapor for a while, and other physical properties were also satisfactory.

This idea was made based on such confirmation.

This idea consists of a board made by arranging a large number of foamed strings of styrene resin in parallel and fusing their longitudinal surfaces to each other. The string-like material located inside the plate is made of an acid copolymer, and the string-like material is made of a styrene homopolymer, and the copolymer contains 2 to 25% by weight of hydrated maleic acid.
The present invention relates to a bath board characterized by using a compound chemically bonded to the remaining styrene.

The bath board according to this invention will be explained as follows based on the drawings.

FIG. 1 is a perspective view of the bath board according to this invention, and FIG. 2 is an enlarged view of the circular portion in FIG. 1.

In the figure, the bath plate a is made up of a large number of foamed styrene resin strings 1 and 2.

These string-like objects are arranged in parallel to each other, and are fused to each other to form a single body with substantially no gaps between adjacent string-like objects.

Among them, the string-like material 1 located on the surface of the bath board is made of a styrene-maleic anhydride copolymer, and the string-like material 2 located inside the bath board is made of a styrene homopolymer. .

In FIG. 2, the string-like object 1 located on the surface has a perspective view on its side surface to distinguish it from the string-like object 2 located inside.

The styrene-maleic anhydride copolymer referred to in this invention is a copolymer of styrene and maleic anhydride, in which maleic anhydride accounts for 2 to 25% by weight, and the remainder is styrene. These are copolymerized with each other.

A styrene homopolymer may be partially contained therein.

That is, the copolymer mentioned above includes a mixed polymer, in which a styrene-maleic anhydride copolymer is mixed with a styrene homopolymer, and the total contains 2 to 25% by weight of maleic anhydride. Ta.

Also includes mixed polymers. It is desirable that each assembly 1 and 2 has a variation in expansion ratio.

That is, it is desirable that each set has a high density on the surface and a low density on the inside.

This is because deformation due to heating is further reduced.

In the cross section of such a plate, the high-density portions on the surface of each set are distributed in a net shape to form a skeleton, and the net is filled with low-density portions. It shows.

It is desirable that each of the composites 1 and 2 have an area of 0.005 to IC711 in a cross section perpendicular to the longitudinal direction.

In addition, the board is 0.1 to Q as a whole, '7g/cc
It is desirable to have a density of

Its thickness, width and length are appropriately determined depending on its use as a bath lid and as a drainboard board.

In order to make the bath board of this invention, it is preferable to use a coextrusion molding method.

To do this, two extruders are used; one extruder is supplied with styrene-maleic anhydride copolymer, which is impregnated with a blowing agent and guided to the die, and the other extruder is supplied with styrene-maleic anhydride copolymer. A homopolymer is supplied, a blowing agent is added to the homopolymer, and the same is introduced into the same die.

A large number of small holes are bored in the cap, and the copolymer is introduced into the outermost row of small holes, and the homopolymer is introduced into the other small holes located inside, and thus the copolymer is introduced into the remaining small holes located on the outside. The copolymer is extruded through the small holes, and the homopolymer is extruded through the small holes located inside.

A large number of the extruded products are arranged in parallel and advanced, and are foamed to a certain extent during this time to form a string-like material, and while the material is still softened, their surfaces are brought into contact with each other and fused.

In this way, the bath board according to this invention is obtained.

As the blowing agent, a hydrocarbon or halogenated hydrocarbon having a boiling point lower than the softening point of the copolymer or homopolymer is used.

The bath board of this invention uses a heat-resistant styrene resin made of a styrene-maleic anhydride copolymer on the surface of the board, so it does not deform much even when it comes in contact with steam or hot water. Copolymer foam alone generally has the disadvantage of being easily broken and therefore brittle when bent, but the bathtub of this invention has a styrene homopolymer foam inside, making it difficult to bend. It is strong against.

Furthermore, since the amount of styrene homopolymer is large, the price is also low.

The bath board of this invention has the above-mentioned advantages over conventional bath boards made of styrene resin.

In addition, the bath board of this invention, like the conventional bath board made of wood, does not go to waste, is lightweight, has insulation properties, and does not feel cold to the touch. It has various advantages.

In this respect, the bath board of this invention is particularly suitable for use as a lid for a bathtub, as a floor construction material for a bathhouse, and especially as a construction material for a bath grout.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a bath board according to this invention. FIG. 2 is an enlarged view of the circular portion in FIG. 1.

Claims (1)

[Scope of utility model registration request] In a board made by arranging a large number of foamed strings of styrene resin in parallel and fusing their longitudinal surfaces to each other, the strings located on the surface of the board are made of styrene-maleic anhydride copolymer. The string-like material located inside the plate is composed of a styrene homopolymer, and as the above copolymer,
A bath board characterized by using a compound in which 2 to 25% by weight of maleic anhydride is chemically combined with the remaining styrene.