JPS5815458B2 - Architectural blow-in material - Google Patents

Description

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

The present applicant has previously proposed a new construction material based on aluminum hydroxide sludge produced during alumite processing (Japanese Patent Application No. 53-99914), but the present invention is based on aluminum hydroxide sludge. This product was developed to make its use more effective, and is made mainly of aluminum hydroxide sludge, which has excellent properties such as non-combustibility and heat resistance, and organic fibers such as fluffy waste paper. The purpose of the present invention is to provide a new blown material having excellent properties such as strength, lightness, and nonflammability.

A large amount of aluminum hydroxide sludge is generated during alumite processing, but this aluminum hydroxide sludge is in the form of a gel, and no effective means of utilization or effective treatment have yet been developed, so it is disposed of in landfills, oceans, etc. as filth. It had been dumped.

However, aluminum hydroxide sludge is gel-like and has poor drainage and permeability, making it difficult to dry and solidify. Therefore, aluminum hydroxide sludge that is dumped weakens the ground or causes marine pollution, so it is difficult to dispose of it. The reality of the industry is that they are struggling.

On the other hand, in recent years, blown-in materials that are installed in the attics of warehouses and houses have been attracting attention in order to save energy, but blown-in materials are still being used for their heat retention, insulation, soundproofing, non-flammability, light weight, and economic efficiency. We develop materials that satisfy the various properties required for materials.
The reality is that it has not been put into practical use.

Therefore, the present invention has been made in consideration of the above-mentioned points, and utilizes aluminum hydroxide sludge generated during alumite processing, which was conventionally nothing more than filth, to be used effectively as a blowing material. Some materials aim to provide construction materials with the above-mentioned properties, and in particular gel-like aluminum hydroxide easily envelops organic fibers such as fluffy waste paper and fiber waste within a certain pH range. This was developed based on the fact that it has the property of condensing in this way, and that this property makes combustible organic fibers nonflammable.

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.

The pH at this time is 6 to 7, and when the pH is high, gelled aluminum hydroxide, which is an adhesive substance, tends to coagulate and settle in a short period of time without fully enveloping the fluffy waste paper.

Therefore, an acid such as sulfuric acid or phosphoric acid is added to lower the pH to 4-6.

As a result, the coagulation and sedimentation of aluminum hydroxide slows down, and it is dispersed widely 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 waste paper, but as mentioned above, at a pH of 6 to 7, the coagulation and sedimentation rate is fast, so it is not enough to wrap waste paper waste paper in the form of waste paper. It is not possible to 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 improved freeness and water permeability, making it easier to dry. This also makes it easier to work with the waste after it hardens.

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

Fluffy waste paper 15-25% Gelled aluminum hydroxide 3-5% Powdered aluminum hydroxide 70-80% Examples of basic compositions calculated on an anhydrous basis are as follows, and large amounts of multiples thereof are blended.

Waste paper (fluffy) 2.5. kg (25%) Aluminum hydroxide (gel form) 0.5 kg (5%) Aluminum hydroxide (powder form) 7.0 kg (70%) Next, the mixture produced as above was dried and solidified. If so, the waste cotton easily becomes a fibrous material.

Therefore, this fibrous material can be scraped and laid on the roof of a warehouse or the like.

As explained above, the present invention takes advantage of the fact that aluminum hydroxide sludge, which had been difficult to treat in the past, has the property of condensing in a way that envelops organic fibers such as waste paper, and achieves effective utilization of this. Although organic fibers such as waste paper and fiber waste have traditionally had excellent properties such as heat retention, sound insulation, and lightness, their use as construction materials has been limited due to their flammability. By encasing and condensing the fibers in non-flammable, heat-resistant aluminum hydroxide sludge, we are able to take advantage of the excellent properties of organic fibers while overcoming their drawbacks.

In addition, since a large amount of powdered aluminum hydroxide is mixed into gelled aluminum hydroxide, which is difficult to dry and solidify, it improves freeness and water permeability and dries easily. Because it hardens, it is extremely easy to work with waste cotton.

Therefore, according to the present invention, a blow-in material excellent in heat retention, heat insulation, soundproofing, nonflammability, 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, add powdered aluminum hydroxide produced by drying gelled aluminum hydroxide sludge, mixing and stirring, drying this, and then scraping it. A blow-in material for construction.