Composition for the manufacture of plate materials

 

(57) Abstract:

The inventive object of the invention is to improve the physico-mechanical characteristics of materials and the reduction of the length of the extrusion. This objective is achieved in that in the composition, including signosagencia particles, metallophosphates binder and urea, as metallophosphates binder used aluminophosphate binder BM in the following ratio, wt. % (dry matter): binder aluminophosphate BM 26-42, urea 4,3-7, signosagencia particles rest. table 2.

The invention relates to woodworking industry and can be used in the production of Board materials, fittings of them.

The closest prototype of the number of known technical solutions is the composition of the press mass for the manufacture of fire-protected wood-based panels, including alumacraft binder, urea and wood particles.

A disadvantage of the known compositions are low physical and mechanical properties of plate materials and the toxicity of their production.

The purpose of this invention is the improvement of physico-mechanical pogatsa fact, the composition for the manufacture of plate materials, including signosagencia particles, aluminophosphate binder and urea, as aluminophosphate binder contains a binder BM on the basis of phosphoric acid, aluminum hydroxide, salts of boron and magnesium in the following ratio, wt. % (dry residue):

Phosphate of light - based BM 26-42 Urea 4,3-7,0

Lignotuber - containing particles Rest

As metallophosphates binder used aluminophosphate binder BM in the following ratio, wt. % :

Binder alumina - phosphate BM 26-42 Urea 4,3-7

Lignotech - bearing particles Rest

The composition was prepared as follows.

P R I m m e R. For the preparation of compositions used.

Binder aluminophosphate BM TU 113-11-92. Urea GOST 2081-75. As lignocellulosic particles used wood fiber with a degree of grinding of 350-400 units RO (device Unidrive) obtained in the refining of hardwood and softwood in the ratio of 75: 25 (% ).

A portion of the fiber humidity 10% is treated in the mixer with an aqueous solution of a binder concentration of 40% , pre-modified urea. Then processed in M. Pressed plate at a temperature of 160 3aboutS with a duration of 0.8 min/mm of the Finished plate is cooled, cut out the designs and feel.

Examples of the compositions shown in table. 1. Physico-mechanical properties of the plates are shown in table. 2.

The invention improves physical and mechanical properties of plate materials and to reduce the duration of pressing. (56) USSR Author's certificate N 887602, CL 08 L 97/02, 1980.

COMPOSITION FOR the manufacture of PLATE MATERIALS, including signosagencia particles, aluminophosphate binder and urea, characterized in that it as aluminophosphate binder contains a binder BM on the basis of phosphoric acid, aluminum hydroxide, salts of boron and magnesium in the following ratio, wt. % (dry residue):

Specified aluminophosphate binder BM 26 - 42

Urea 4,3 - 7,0

Signosagencia particles Rest

 

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25 cl, 4 tbl, 23 ex

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2 tbl, 1 ex

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