SU1216170A1 - Composition for manufacturing sound-absorbing lagging - Google Patents

Description

The invention relates to the production of building materials, in part to carry sound-absorbing slabs.

The aim of the invention is to increase the structural strength.

Mineral fiber is the main structural component. In combination with a binder, it forms a strong, rigid, porous structure capable of absorbing sound energy. Since an effective sound absorbing material must have maximum openness and through porosity, as well as a developed pore surface, through the use of mineral fiber, porous products 19 "have a common opening1 | 1st porosity ca.

Polyvinyl acetate, soluble glass, calcium chloride, clay component, and boric acid are

KOMPOEITSIONN1L4 CONNECTED4.

The purpose of each component of the composite binder is: polyvinyl acetate — the main binding component with high adhesive properties; the clay component (kaolin or bentonite) is a filler that allows to reduce the consumption of polyvinyl acetate, improve the fizicomechanical properties of the product, as well as reduce its flammability, boric acid - fire retardant and antiseptic, reduces the flammability of the product and increases its mushroom resistance; soluble glass and calcium chloride - technological additives.

The simultaneous introduction of soluble glass and calcium chloride makes it possible to obtain a binder with a predetermined viscosity, which is necessary in the manufacture of products using a pas- tic method. When calcium chloride is introduced into the liquid glass solution, anorphous silica precipitates and a gel of a certain viscosity forms over time.

701

In a paste-like process, mineral fibers in the form of tufts or granules are mixed with a binder of a certain viscosity and the resulting molding composition in the form of a paste is laid out on pallets and then fed to suvasa. In this method, the viscosity of the binder is important.

If the binder has a viscosity, then when mixed with mineral granules it is cut off from the granules and drains from the pallets. Molding mass is obtained non-ductile, with poor stacking properties, products have low strength, uneven structure.

If the viscosity of the binder is very high, then the ink granules are poorly stained by the binder, the abrasive mass is very thick, the pallets are poorly filled, and the products are also of poor quality.

Sound absorption {th material based on the proposed composition is made according to the following technology. A soluble glass, used in the form of an aqueous solution of 5–10% concentration, is successively introduced into the clay component, calcium chloride, a floor of vinyl acetate and boron acid. Then, the resulting solution is mixed with mineral fiber in the form of tufts or granules to obtain a homogeneous mass, after which the products are formed. Formed-BaHfoie blanks are dried at 100-150 C, polished, cut into plates of specified sizes and subjected to drying.

In tab. 1 Thedena formulations of the proposed composition, and in Table. 2 - properties of compositions of the proposed and famous compositions.

CtpyKTypHaH strength is determined by the weight loss of the samples after the impact loads have been lifted.

Bulk weight

kg / m 400

Tensile strength

with bending, kgf / cm 20

Hardness, kgf / cm 25

Structural strength,% not more than 30

Sound absorption coefficient at a frequency of 1000 Hz0.64

350350400450450

11 1162023 19.6

13,218253234

26,824.211817.2

0,700,680,640,600,50

Compiled by A. Zaslavska Editor G. Volkov Techred A.Ach Corrector B. Roshko

Order 959/28

Circulation 640

WEBSITES of the State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zhg35, Raushsk nab. 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

Continuation of table

 T in ca 2

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Claims (1)

COMPOSITION FOR MANUFACTURE OF SOUND ABSORBING MATERIAL, containing mineral fiber, soluble glass and clay component, characterized in that, in order to increase structural strength, it additionally contains polyvinyl acetate, calcium chloride and boric acid in the following ratio of components, wt.%%. : Mineral fiber 34-68 Soluble glass 10-12 Clay component 10-30 Polyvinyl acetate 10-20 Calcium chloride 1-2 Boric acid 1-2 >