SU72614A1 - The processing method of cast products from plant-fibrous materials - Google Patents

Description

The proposed method of processing readable products from plant-growing LUXURY materials. UV has the peculiarity that, in order to increase water resistance, strength and fire resistance, the product is impregnated with chlorinated varnish with the addition of 15 to 25% plasticizer (chlorinated paraffin) in an amount of 15-25% by weight chlorinated lacol. In order to avoid release of hydrogen chloride in the shale, about 5% of the weight of dry water from the slaked lime or other mineral fibers, organic based, with weak alkaline properties, are added to the plant fiber during the casting. .

To impregnate the cast products, a 70% solution of hydrogen chloride is used in dichloroethane. Instead of dichloroethane, chlorobenzene, a mixture of chlorobenzene with white spirit, benzene, acetone can be used. The solution is prepared as follows: 3 weight is charged into an iron tank with a mechanical stirrer. h. dichloro phase n gradually 7 wt. including chlorinated varnish, crushed to the size of a walnut.

During loading start up the mixer.

After the end of loading, the tank is tightly closed with a lid and the contents are stirred until complete dissolution. Dissolving chlorinated 5 tacol with dichloroethane can be accelerated by heating it to 50. For this, the tank must have a water jacket to heat it with hot water.

The finished impregnating composition from the tank is piped to the bath where the products are soaked.

Material 1 is impregnated at 15–20 ° C for 5–10 min, depending on the density of the fibrous material of the product and its size. A through-hole nipple is obtained if the product absorbs about 200 liters of impregnating compound, but relative to its original 72614

its weight. If end-to-end impregnation is not required, the duration of the stitching is reduced to 0.5-1 minutes.

After impregnation, the product is removed from the bath, and the excess impregnating composition drains.

The impregnated products, depending on the depth of impregnation and the walls of the products, are dried at 60-70 ° for 16-24 hours.

Sugar products at a higher temperature should not be, because chlorinated lacquer detaches hydrogen chloride, which can weaken the fibers of the products.

Tensile strength and tensile articles. impregnated with chlorinated lacol, is characterized by the following data: unronitized sample - 34, impregnated with 70% chlorinated lacol solution - 86.5 kg / cm. Thus, the linearization by chlorinated .lako.tem increases the tensile strength by more than two times.

Testing of the water resistance of products made by chlorinated alcohol showed that while non-impregnated samples were usually soaked for several minutes, they absorbed up to 300–350% of water (from their dry weight) infused with a 70% solution of chlorinated lacol h. 24 hour 24 hours was 1.6% water.

PRIORITY AREA

1. A method of treating molded products made of plant-fiber materials, HI, and so that, in order to increase the water resistance, durable and fire resistance, the product is impregnated with chlorinated lacquer, and then dried at 60-70 V within 16-24 hours

2. Acceptance of violence but n. 1, characterized in that from 1.5 to 2.5% of a plasticizer is added to the chlorinated lacquer used.

3. Acceptance of the method no mon. 1 i-i 2, characterized in that, in order to avoid the splitting of hydrogen chloride during sowing, in the vegetable mass in the casting mass, during the casting, add 1% from about 5% of the hashed lime or other mineral or organic bases.