JPS5831096B2 - Granular base for building materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a granular material for building materials, which is characterized in that calcium carbonate and bentonite are mixed with a binder other than polyvinyl alcohol, kneaded with water, and then granulated and dried using a granulator. It is related to the base material.

In the construction of houses, a variety of construction methods are used to improve the appearance, strength, moisture resistance, water resistance, fire resistance, heat retention, etc. of the interior walls, exterior walls, and ceilings.

Plywood is often used for construction of interior or exterior walls, and several types of plywood are used depending on the purpose.

The characteristics of plywood are that it has the advantages of wood and properties that natural wood does not have, that is, it has improved properties by processing plywood.

Processed plywood includes overlay products, in which the surface of plywood is coated with plastic or other thin materials, the beautiful grain of wood is transferred onto the plywood using an automatic wood transfer machine, and resin-baked products require painting. A variety of plywoods are manufactured and used depending on the purpose, such as embossed plywood, fire-retardant plywood treated with fireproofing, and insect-proof plywood treated with insect repellent.

However, even though these are flame-retardant plywoods, plywood whose surface is coated with a thin material such as plastic is not preferable because it generates toxic gas in the event of a fire.

As a result of various studies regarding the production of flame-resistant plywood, the present inventors found that the adhesive composition was applied to the surface of the plywood, the granulated base of the present invention was tightly spread on the adhesive composition, and the granulated base material of the present invention was tightly spread on the adhesive composition, and after being compressed with a roller. It has been discovered that by drying, it is possible to produce decorative plywood that has not only flame resistance but also water resistance.

The present invention relates to the granulation base. The method for manufacturing the granulation base of the present invention will be explained step by step.

To produce the granulation base of the present invention, calcium carbonate and bentonite, and if necessary, other mineral powders are added, crushed using a crusher, and used as fine powder.

Examples of other mineral powders include raw stones such as slaked lime, gypsum, kaolinite, talc, silica, pumice, diatomaceous earth, and mica.

The substance that binds these mineral powders is polyvinyl alcohol (in the case where polyvinyl alcohol is used as a binder, an application has been filed as Japanese Patent Publication No. 56-32345).
In addition to synthetic binders such as acrylic ester copolymer resins, vinyl acetate resin emulsions, nitrocellulose resin emulsions, urea resins, melamine-urea cocondensation resins, and phenolic resins, methyl cellulose, carboxymethyl cellulose, and acetyl cellulose are excluded. In addition, natural binders such as gum arabic, starch, dextrin, and glue are used within a range of 0.2 to 10%.

These may be used alone or in combination of two or more depending on the purpose.

If coloring is required depending on the application, an appropriate amount of a basic dye, dyed lake pigment, soluble azo pigment, insoluble azo pigment, phthalocyanine pigment, or inorganic pigment such as red iron is added as a coloring agent.

In order to finish the base surface beautifully, we use lubricants such as nonionic or anionic surfactants, oil, oxalic acid, sodium benzoate, aluminum stearate, magnesium, sodium, zinc, sterotex, wax, etc. It may be added in a range of 0.1 to 5%.

If insect repellent or fungicidal treatment is required, a small amount of insecticidal or fungicidal component may be added as appropriate.

Mineral powder selected from the above materials, a binder, and a coloring agent or lubricant depending on the purpose are weighed and mixed in appropriate amounts, added with water, kneaded, and then extruded using an extrusion granulator. Shape into a rod with a diameter of 4 to 0.5 mm.

This is granulated into cylindrical or spherical shapes of appropriate length, and then dried.
A cutting sieve, preferably 9 meshes (2,0 mm) to 1
Sieving is carried out using a 6-mesh (1,00 mm) sieve.

In addition to ribbon type mixers, V type mixers,
A Leica machine, Narrator type mixer, etc. can be used, and a back mixer, Pan Bali mixer, etc. can also be used as the kneading machine.

Next, a combination example will be described.

Formulation example 1 Calcium carbonate 86 parts Bentonite 10 Carboxymethyl cellulose 41 parts Formulation example Calcium carbonate Gypsum Bentonite Mica powder Gum arabic Vinyl acetate resin emulsion 55 parts 20 0l1 2 3 2 // Formulation example 3 Calcium carbonate 62.5 parts Bentonite 13 Talc 20 Carboxymethyl cellulose 2 Polyacrylate copolymer 2 Lake red pigment
0.511 The production of the granular base material of the present invention will be explained by giving examples.

Example 1 After mixing 1 ton of the composition blended in Formulation Example 1 with a ribbon mixer, put it into a pony mixer and horizontal kneading machine, and add 350 kg of water.
After adding and kneading for 15 minutes, the mixture is granulated using a screw extrusion type granulator.

The diameter of the screen used at this time was 1 mm.

The granulated base material is directly dried in a horizontal flow dryer at a temperature of 90°C.

After drying, 9 meshes (2,0 mm) to 16 meshes (1,
The particles are sized using a rotary sifter equipped with a sieve (00) to obtain the desired base material.

Example 2 After mixing 1 ton of the composition blended in Formulation Example 2 with a ■ type mixer,
The mixture was put into a Pan Bali mixer, mixed with 350 kg of water for 20 minutes, and then granulated using a screw extrusion type granulator.

The diameter of the screen used at this time was 2rIL7IL.

The desired base material is then obtained in the same manner as in Example 1.

To use the granular base of the present invention for decorative plywood, the granule base of the present invention is tightly spread on the plywood coated with the adhesive composition, compressed with a roller, and then dried. This makes it possible to produce decorative plywood.

In addition to decorative plywood, the granular base of the present invention can be used for insulation, sound-absorbing Ceracola board materials, wall materials, etc.; however, white cement, water, crushed stone, etc. This makes it possible to manufacture concrete blocks for interior use.

Next, the results of a disintegration rate (%) hardness test will be described as characteristic values of the granular base produced according to this formulation example.

Test method: Sieve residue previously sieved through a 500p standard sieve (
Upper part) is taken as a sample, and this sample 100? Weigh it correctly using a top balance and place it in a ball mill porcelain pot with an inner diameter of 10,100 mm and an inner depth of 100 mm (commonly known as a 4-inch pot), and a diameter of 30 ± 2.
rILrIL, put 3 porcelain balls weighing 35±31, close the lid evenly, place the pot on a roller whose rotation speed has been adjusted, and rotate it properly for 15 minutes.

After 15 minutes, remove the raw flavor into a vat and pass through a standard mesh sieve (5
00p), and accurately weigh the amount of fine powder (A) that passes through with a top balance.

Determine the disintegration rate (%) using the following formula and use it as hardness.

It is carried out using methods with a rotation speed of near 5 rotations and 120 rotations.

Comparative Example of Formulation Example 1 The amount of carboxymethyl cellulose removed from Formulation Example 1 was supplemented with bentonite to make the total amount 100.

Comparative Example of Formulation Example 2 The amount of vinyl acetate resin emulsion and gum arabic removed from Formulation Example 2 was supplemented with bentonite to make the total amount 1.
It was set as 00.

Comparative Example of Formulation Example 3 The carboxymethylcellulose and polyacrylic acid ester copolymer removed from Formulation Example 3 were supplemented with bentonite to make the total amount 100.

Claims (1)

[Claims] 1. A granular base for building materials, which is obtained by adding a binder other than polyvinyl alcohol to calcium carbonate and bentonite, kneading the mixture with water, and then granulating and drying the mixture using a granulator.