Pulp molded material

 

(57) Abstract:

The material used in the field of building materials for thermal insulation of buildings and structures, furniture industry and other sectors of the economy. The material is made of spongy wood particle size of 3.8-4 mm with KF. h20 and tonkoizmelchennyj wood particle size < 3.8 mm with KF. h20 at a ratio of 1 : 0.3 to 0.5. As wood particles used fire bast plants, sawdust, logging residues, or a mixture thereof. Technical result: getting a cheap environmentally friendly material with improved operational performance by increasing its strength. 1 C.p. f-crystals, 1 table.

The invention relates to fibrous cellulosic materials and can be used in the field of building materials in the form of sheets and plates intended for thermal insulation of buildings and structures, furniture industry and other sectors of the economy.

Teplonositeli newly constructed buildings can be achieved through the proposed new cheap insulating materials made from waste wood and flax industries. Such materials and terjadinya in the waste wood, emitted when the pre-treatment, it makes the resulting material is environmental friendly. The production of such materials is a rational direction for the integrated use of waste products.

Known insulating material containing interconnected particles ground and not the fires of flax (see USSR Author's certificate N 1530601, class C 04 B 18/24, publ. 23.12.1989).

The disadvantage of this material is its low mechanical strength and low thermal insulation properties.

Closest to the invention to the technical essence is a pulp molded material composed of particles fires fraction of 0.5-3 mm, initial fires and fires fine grinding, interconnected by polysaccharides isolated from the particles when they are grinding in the wet state (see RF Patent N 2081098 class. C 04 B 40/00, publ. 10.06.1997).

The disadvantage of this material are low physico-mechanical parameters.

The objective of the invention is to provide a molded pulp material, ensuring the achievement of the technical result consists in the improved performance by increasing chastity, interconnected polysaccharides, is achieved by the fact that it is made of spongy wood particle size of 3.8-4 mm shape factor of the particles TOF. h20, and tonkoizmelchennyj wood particle size < 3.8 mm with a shape factor of the particles TOF. h< 20, the ratio of the spongy and tonkoizmelchennyj wood particles, respectively, is 1: 0.3 to 0.5, and as the wood particles used fire bast plants, sawdust, logging residues, or a mixture thereof.

The main raw material for the proposed material is waste from flax industry - fire bast plants, flax fire, which is the woody part of the stem of the flax. In the processing of flax trusts formed about 2.8 tons of fires per 1 ton of fiber, which is irrational, and 100 thousand tons of flax straw can ensure the production of the material in volume from 100,000 to 200,000 m3per year.

If the ratio of spongy to concratulations wood particles and in particular TO aF. h(the ratio of length to thickness) in the material creates a certain structure, which is the main determinant of its prognostic among themselves, and when the molding increases the number of adhesive contacts, causing an increase in strength.

The proposed pulp molded material produced by next technology.

Wood particles (linen chaff, sawdust, forest residues) are razvlecheniy in a weak alkaline medium by any known method until the particle size of 3.8-4 mm and KF. h20 and the thin razvlecheniy to the particle size of < 3.8 mm andF. h< 20.

From wood particles when razvlechenii them in an alkaline medium are polysaccharides (pectin, hemicellulose), which bind the particles together. The resulting mixture is subjected to cold forming under pressure and dried.

Specific examples and operational characteristics of the proposed pulp molded material and the prototype shown in the table.

As can be seen from the table, the proposed pulp material has a high strength (MPa) 1,0 instead 0,40 prototype, its heat and sound insulation properties correspond gastropanel indicators.

Pulp molded material according to the invention on the organoleptic and physico-chemical parameters meet sanitary-hygiene the Alov.

1. Pulp molded material containing wood particles interconnected by polysaccharides, characterized in that it is made of spongy wood particle size of 3.8-4 mm shape factor of the particles TOF. h20 and tonkoizmelchennyj wood particle size <3.8 mm with a shape factor of the particles TOF. h<20, the ratio of the spongy and tonkoizmelchennyj wood particles, respectively, is 1: 0.3 to 0.5.

2. Pulp molded material under item 1, characterized in that as the wood particles used fire bast plants, sawdust, logging residues, or a mixture thereof.

 

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