SU554819A3 - The method of obtaining the overlap - Google Patents

Description

one

The invention relates to the textile industry, in particular to the development of a method for producing suspended ceilings.

A known method for producing suspended ceilings by fixing fibrous material from cellulosic (or cellulose-derived) fibers on a fibrous material structure, in this case, as a rule, elongated fibers 1,2 are used.

The resulting overlaps do not provide the required appearance and do not satisfy the operational requirements.

The purpose of the invention is to improve the type of overlap and increase the service life. This goal is achieved by using a fibrous material based on cellulose derived from cellulose derivatives with crystallinity 5–35% lower than the crystallinity of the starting cellulose and pre-wetting the material with water or organic solvent to swell the fiber.

Example 1. A cotton cloth for 5 minutes is immersed in a 3% aqueous solution of sodium hydroxide at 35 ° C. The fabric is then immersed for 1 min in a 20% aqueous solution of sodium hydroxide at 25 ° C, and immediately released from the treated solution by washing in water. AT

During the whole process, the fabric should not be stretched more than is necessary for its transportation through the baths. Next, the fabric is impregnated with a solution of

10 hours dpammonium orthophosphate and 30 hours urea in 60 hours water. After squeezing the fabric and dried for 13 minutes at 160 ° C. It is then washed in water and dried. Such anti-inflammatory treatment leads to the fact that

in the event of a fire, the fabric cannot sustain combustion, but rather only carbonizes — it is covered with a crust of carbon that is difficult to be turned into ash. The fabric is then stitched into sections of the desired size.

for overlap construction. This stitching is performed with a cotton thread, which is pretreated with an anti-igniter in the same way as described above, or with a glass fiber thread. After swelling in water cloth

hang on the wall at the height of the neck below the ceilings in the room where the fabric will serve as the ceiling structure. There is no need to nathei fabric, it can be hung free

like a bag. When the water evaporates, the fabric shrinks and, therefore, it itself pulls up.

This fabric may also be coated with plastic to provide a more fire resistant coating.

Example 2, The fabric of example 1 is covered on one side with a paste composition, wt. b .: Ethyl hydroxyethyl cellulose8

Triethanolamine Triaminotriazil Pentaerythritol Ammonium Polyphosphate Titanium Dioxide Oxaldehyde Formic Acid Water

The coated surface is sprinkled with glass yarns or fibers 3 cm long at a rate of 20 g / m and then dried in an oven at 100 ° C. After that, the fabric is again coated on the same side with the same paste and dried again.

The resulting fabric is cut into pieces of the desired size, moistened with water until the maximum swelling is reached, and then placed as a ceiling structure as described in Example 1.

The coating applied to the fabric provides a strong carbon foam in a fire that is difficult to turn into ashes.

Example 3. Staple fiber is obtained from viscose pulp using a slight tension during spinning. 95 parts of this fiber are mixed with 5 parts of aluminum silicate fibers with a fiber diameter of 2.5 µm and are spun with number 30. From this yarn is a fabric with 10 threads / cm in each base and weft. The fabric is treated to render it non-flammable with ammonium phosphate and urea in the same way as described in Example 1 and then used as a ceiling covering similarly to Example 1. It is also possible to coat the fabric with glass yarn or aluminum silicate yarn that is already spun in Yarn, providing sufficient resistance to fire in case of fire.

Example 4. 400 denier yarn of viscose silk, crawling with slight tension during spinning, is woven together with fiberglass to form a fabric having 10 threads / / cm in the weft and warp direction. Fiberglass forms every tenth thread both in the weft direction and in the warp direction. The fabric is treated with an anti igniter in the same way as described in example 1. Then it is ready for use as a swelling ceiling structure. The fabric can also be coated with plastic in the same manner as described in Example 3 for use as an anti-ignition ceiling. Since shrinkage is greater than swelling, fiberglass filaments that do not shrink or swell do not prevent the fabric from being used as a self-ceilinging ceiling. A shrinkage effect can be achieved in these fabrics by moistening viscose silk before weaving. In the process

The shrinkage of the glass yarns provides a ceiling covering with some effect of corrugation that can be used for decorative purposes.

Example 5. From the yarns prepared according to example 3, receive a knitted fabric. The knitted fabric is then treated to give it anti-inflammatory

properties according to example 3, after which the fabric is covered with plastic in the same way as shown in example 3.

Knitted fabric has the advantage over woven, which is

that when used in complex profiles of a room, no wrinkles or stretches form on its surface when the web begins to stretch itself (shrink). Knitted fabric can be

It is made of viscose silk yarns obtained according to Example 4. However, it is necessary to replace part of the silk yarns with fiberglass yarns, which leads to the fact that some yarns in the knitted fabric consist of fiberglass. Then knitted fabric covered with plastic in the same way as described in example 3.

Example 6. Cotton is treated with an aqueous solution of 2-aminoethylsulfuric acid and sodium hydroxide and heated so that aminoethyl cellulose is obtained, this cellulose having a substitution level of about 1, 2. The washed reaction product is then treated with tetraxyhydroxymethylphosphonium - chloride and ammonia in an aqueous solution, and then washed and existed. The resulting fiber is displaced with approximately 5% glass fiber having a length of 2 cm and a diameter of 5 μm, and then combed out. Received

non-woven fiber is glued by a point method with melamine glue and then it is cured and cured at 105 ° C in an oven.

The resulting woven fiber product may be used after swelling in water.

for installation as a ceiling covering in the manner described in the earlier example.

Example 7. Bleached sulfate cellulose from pine is treated with aminoethyl

and phosphonium is the same as cotton in the previous example. A sheet of paper is prepared from the obtained fiber, this paper sheet having a weight of 50 g / m. Spun viscose yarns (length 3 cm, coarseness 840 denier) are spread on a wet sheet, and these viscose yarns are obtained in the same way as described in example 4. Viscose yarns and fiberglass yarns of the same length and number of denier with respect to the components of the mixture of viscose and fiberglass 3: 1 are treated to render them non-flammable with aminoethyl and phosphonium and treated with polyethylenimine treated with tetraxyhydroxymethylphosphonium chloride. The thread layer has a weight of 75 g / m.

Next, a suspension of cellulose fiber treated with aminoethyl n phosphonium is cast onto the surface of a layer of viscose fiber n fiberglass, so that the solid layer together with the suspension and the nerve sheet form a paper with a gram-weight of 175 g / m.

This sheet is impregnated with an aqueous solution of ethyl ethoxy cellulose and oxaldehyde, extruded and dried. The resulting sheet is used as a ceiling covering in the same way as in the previous examples.

The sheet can also be coated with a mass of the same type as in Example 2 and the resulting product is used as a ceiling covering as indicated by the vinge.

Claims (2)

1. Patent of Sweden No. 357695, cl. In 29d 3/02, published. 1973. 2. The patent of Sweden No. 356325, cl. E 04f 13/20, published. 1973.