JP2000198867A - Recycled flame-retardant foamed board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a recycled flame-retardant foamed board useful as a decorative board, etc., having a lightweight and a large strength, capable of being easily applied to construction, capable of being permanently recycled, and capable of responding to the demand of the resource-saving time by (1) adding a recycled plastic, a virgin plastic, a flame retardant and a foaming agent to a base material comprising waste paper and a cement and (2) using as the base material the waste paper whose recycling has been said to be difficult. SOLUTION: This recycled flame-retardant foamed board is produced by adding a recycled plastic, the virgin plastic of the same kind for increasing the hardness of the board, a flame retardant and a foaming agent to a base material prepared by kneading, drying and pulverizing waste paper and a cement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recyclable foamed flame-retardant board based on waste paper and cement used for decorative boards such as ceilings and walls.

[0002]

2. Description of the Related Art Conventional decorative boards and the like are based on gypsum. This gypsum board was heavy and easily broken. On the other hand, it has been said that it is extremely difficult to recycle waste paper because it has been recycled by adding plastic. Therefore, used paper is usually discarded by incineration means. However, as seen from the dioxin problem, incineration disposal is a social problem and is not preferred, and recycle is required.

[0003]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems. First, it is to enable the recycling of waste paper which has been considered difficult. Second,
It was developed with the primary objective of making the recycled foamed flame retardant board, which is a recycled product, easy to install and light and strong. Further, if a recycled product cannot be recycled again, it must be discarded, and the meaning of recycling is reduced by half. Therefore, an object of the present invention is to provide a recycled foamed flame-retardant board as a recycled product that is light, strong, and has a large use value, and that can be recycled again.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a recycled plastic and a virgin agent of the same plastic for obtaining hardness based on a powder obtained by kneading waste paper and cement, drying and grinding. The present invention provides a recycled foamed flame-retardant board characterized in that it is prepared by blending a flame retardant and a foaming agent.

[0005]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention.
The first of the materials used in the present invention is a powder of waste paper containing cement. The percentage of the used paper to the whole material is 50% to 55%. The powder of waste cement-containing paper is kneaded by adding water to 60% to 70% of waste paper which has been made into a floc with a mixer, adding 30% to 40% of cement, adding water, and drying and pulverizing to a powder. It was done.

[0006] It is also possible to incorporate recycled gypsum powdered together with cement, for example, gypsum board powder. The cement and recycled gypsum serve as flame retardants and stabilizers for waste paper.

[0007] The second material used in the present invention is recycled plastic and virgin of the same plastic, which is an adhesive for the cement-containing waste paper powder. In the preferred embodiment, the adhesive is 20% to 25% recycled PVC, 20% to 2% virgin PVC.
Add 5 percent. However, the total amount of the adhesive composed of the recycled vinyl chloride and the virgin vinyl chloride does not exceed 40% to 50%. Recycled vinyl chloride is waste vinyl chloride (waste plastic)
Is pelletized by another means. Virgin vinyl chloride is also pelletized.

[0008] If the adhesive of the powder of the cement-containing waste paper is only recycled vinyl chloride, the previous product as a recycled plastic such as vinyl chloride contains a plasticizer as a softening agent, so that a soft board is formed. I will. On the other hand, the virgin agent alone becomes too hard. Therefore, recycled vinyl chloride and virgin vinyl chloride are mixed to add appropriate strength.

In addition to the recycled vinyl chloride, polyester, an AS resin, and an ABS resin represented by a PET bottle can be used as a recycled plastic which can be used in the present invention as another embodiment.

Add 2 to 3 percent of stabilizer. The stabilizer is a plastic stabilizer. In the present embodiment, it is a stabilizer of vinyl chloride used as an adhesive.

[0011] The third material of the present invention is a flame retardant. A flame retardant is obtained by adding about 10% of bauxite and 2% to 3% of aluminum hydroxide to 2% to 3% of antimony trioxide. As a flame retardant, aluminum hydroxide is well known, but antimony trioxide is a highly flame retardant. In addition, bauxite is an inexpensive flame retardant, so that by using a large amount of it, the cost can be kept low.

A fourth material of the present invention is a foaming agent for reducing weight, which is added in 2 to 5 percent. Since it is based on cement, a foaming agent for weight reduction is indispensable.

The above materials are stirred with a mixer. The agitated material is placed in an extruder and the extruder is heated to 140-180 degrees and extruded. As another example, a board material is obtained by compression using a compression press instead of an extruder. In addition, when the mold of the extruder is changed to be hollow, a board having a very high sound insulation effect and heat insulation effect can be obtained.

The material extruded from the extruder has a plastic surface, but can be sanded by the fibrous material of waste paper, and can be subjected to roller printing by sanding the surface. The flame retardancy is increased by adding a little antimony trioxide to the paint. or,
By adding pigment, it becomes a color board and becomes a beautiful decorative board such as a ceiling or wall board.

The recycle of the board according to the present invention includes:
This can be achieved by mixing a new virgin agent into the powdered recycled foamed flame retardant board. In this way, the board can be regenerated many times, and the incorporation of a new virgin agent increases the strength and quality of the board.

[0016]

Since the present invention is constructed and used as described above, the following effects are exhibited. Firstly, it has become possible to recycle waste paper that has been incinerated conventionally as a decorative board, to provide a board that is strong due to the use of a virgin agent and hard to burn by adding a flame retardant.

Secondly, the fibrous material contained in the used paper makes it possible to sand the plastic-like surface, and it is possible to perform roller printing by sanding the surface.

Third, since the board is made from powder, the material can be easily crushed and agitated at the time of recycling again, can be extruded from an extruder, and can be recycled.

Fourthly, by mixing the foaming agent, the weight of the board can be further reduced, and at the same time, the heat insulating effect and the sound insulating effect of the foaming agent can be expected.

[Brief description of the drawings]

FIG. 1 is a flowchart showing one embodiment of a manufacturing process of a recycled foamed flame retardant board.

Continuation of the front page (72) Inventor Kiyoshi Murakami 101 Fukameji Hosoyaji, Ukai, Takizawa-mura, Iwate-gun, Iwate Prefecture 4F074 AA02L AA33D AA33L AA35 AA35L AA65L AC35 CA22 CA24 CC04X DA08 DA18 DA59

Claims (1)

[Claims] (1) A recycled plastic and a virgin agent of the same plastic for increasing hardness are prepared based on a powder obtained by kneading waste paper and cement, drying and grinding, and then a flame retardant and a foaming agent. A recycled foam flame-retardant board characterized by being manufactured.