JPS5815459B2 - architectural spraying material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sprayed construction material based on organic fibers and aluminum hydroxide.

A large amount of aluminum hydroxide sludge is generated during alumite processing, but since this aluminum hydroxide sludge is in the form of a gel, effective utilization and treatment technology has not been developed, and it is simply discarded as factory waste and disposed of in landfills or in the ocean. had been dumped.

However, aluminum hydroxide sludge is gel-like;
The industry has been struggling to dispose of discarded aluminum hydroxide sludge, which has poor drainage and permeability and is difficult to dry and solidify, weakening the ground and polluting the ocean.

Therefore, in order to effectively utilize the aluminum hydroxide sludge that is generated in large quantities during alumite processing, the applicant proposed a new construction material that uses aluminum hydroxide sludge as its main material. No. 99914), the present invention was made in order to further expand the scope of use of aluminum hydroxide sludge. This is sprayed together with an adhesive using a spray machine to spray onto the walls and ceilings of warehouses for the purpose of providing materials for construction use.

In recent years, there has been a strong need for the development of low-profile wall and ceiling materials that are excellent at heat-insulating silicon in order to save energy. The purpose of this project is to effectively utilize aluminum oxide sludge to provide a material for walls and ceilings that satisfies the heat-retaining properties, non-combustibility, soundproofing properties, etc. Gelled aluminum hydroxide has the property of easily enveloping and condensing organic fibers such as fluffy waste paper and fiber waste within a certain pH range, and this property makes flammable organic fibers nonflammable. This was done with a focus on

Hereinafter, the present invention will be explained along with examples.

The waste paper is loosened and turned into fluff, and then put into a water tank, and gelled aluminum hydroxide is added and stirred.

At this time, the pH is 6 to 7, and when the pH is high, gelled aluminum hydroxide, which is an adhesive substance, has the property of coagulating and sedimenting in a short period of time without fully enveloping the fluffy waste paper.

Therefore, add acid such as sulfuric acid or phosphoric acid to adjust the pH to 4-6.
decrease to.

As a result, the coagulation and sedimentation of aluminum hydroxide slows down, and it is widely dispersed in the water tank and floats for a long time, during which time it fully envelops the fluffy waste paper and coagulates.

In addition, even if the pH is 6 to 7, gelled aluminum hydroxide can wrap waste paper in the form of waste paper, but as mentioned above, at a pH of 6 to 7, the rate of coagulation and sedimentation is fast, so it is not enough to wrap the waste paper in the form of waste paper. You cannot wrap up waste paper.

Therefore, it is desirable to lower the pH to 4-6.

Next, powdered aluminum hydroxide produced by drying the aluminum hydroxide sludge is added and stirred.

Then, the powdered aluminum hydroxide is mixed with the gelled aluminum hydroxide, and the mixture of waste paper and aluminum hydroxide produced in this way has greatly improved freeness and water permeability, and can be processed relatively easily. It becomes dry and solidified.

In addition, the above-mentioned fluffy waste paper, gelatinous atbenium hydroxide,
It is desirable to mix powdered aluminum hydroxide in the following proportions.

Waste paper (fluffy) 15-25% Aluminum hydroxide (gel) 3-5% Aluminum hydroxide (powder) 70-80% The specific blending examples calculated on an anhydrous basis are as follows. Weigh and match the quantity.

Waste paper (fluffy) 2.5kg (5%) Aluminum hydroxide (gel) 0.5kg (5%) Aluminum hydroxide (powder) 7.0ky (70%) Next, mix as above. The generated material is turned into fibrous waste, which is then sprayed with a cement gun or other machine onto the walls and ceilings of warehouses and houses at a rate of 400 to 100 ml per square meter.
Spray about 500g.

As this adhesive material, acrylic resin or ethylene vinyl acetate resin is preferable, and specifically, for example, the amount of resin is 50%.
of ethylene vinyl acetate (emulsion) in water
Use diluted to ~20%.

As explained above, the present invention focuses on the fact that aluminum hydroxide sludge, which had been difficult to dispose of in the past, has the property of condensing to envelop flammable organic fibers such as waste paper and making it non-combustible. , which has achieved the effective use of waste paper, which previously had excellent properties such as heat retention, sound insulation, and lightness, but its use as a construction material was limited due to its flammability. Organic fibers such as textile waste are wrapped in non-combustible, heat-resistant aluminum hydroxide ram and allowed to coagulate, making use of the excellent properties of organic fibers while overcoming their drawback of flammability. That's what I'm doing.

In addition, since a large amount of powdered aluminum hydroxide is mixed into the gelled aluminum hydroxide, which is difficult to dry and solidify, the freeness and water permeability are greatly improved.
Therefore, when sprayed on walls, ceilings, etc., it dries and solidifies in a relatively short time.

Therefore, according to the present invention, a sprayed material with excellent heat retention, heat insulation, sound insulation, lightness, etc. can be produced in large quantities at low cost.

Claims (1)

[Claims] 1. After mixing and stirring organic fibers and gelled aluminum hydroxide, powdered aluminum hydroxide produced by drying gelled aluminum hydroxide sludge is added, mixed and stirred, and an adhesive is added to this. The characteristic architectural spraying is wood.