RU54978U1 - INSULATING PLATE - Google Patents

Abstract

The utility model relates to the construction industry - heat-insulating plates and can be used in construction and reconstruction for insulation of roof structures, ceilings, laminated walls. Heat-insulating plates consist of a pressed-in mixture of expanded perlite sand, a binder, a water-soluble polymer and water in a minimum amount. The plates are pressed in a shell of a polymer film having a metallized layer capable of reflecting radiant energy.

Description

The utility model relates to construction materials, in particular - plates for thermal insulation of building envelopes.

Heat-insulating plates from expanded perlite are known - a porous fine-grained glassy material enclosed in a shell of a polymer film and then pressed.

Slabs are widespread in the construction of the former USSR (RTU Lit. SSR 111-75 “Pressed perlite insulation”, TU-7 Latvia. SSR 09-84 “Perlite heat-insulating products - perconsite”), as well as in modern construction of Ukraine (TU V V. 2.7-26.8-13726224.002-2001 "Heat-insulating products based on perlite") due to the simplicity of manufacture and the protection of perlite from moisture during operation.

They are used for thermal insulation of horizontal and low-gradient surfaces.

Significant disadvantages of these plates are:

- the inability to use for vertical and steeply inclined surfaces due to the insufficient structural strength of perlite backfill and its associated displacement under the influence of gravity, the formation of voids and loss of uniformity during operation;

- insufficient heat-insulating ability of the plates, since the polymer film passes radiant energy - a significant component of heat loss through the enclosing structure.

The purpose of the utility model is to improve the physical and technical properties of plates, namely:

- increase the structural strength of perlite backfill;

- giving the polymer shell reflection properties of radiant energy.

The specified goal is achieved:

- The introduction of mineral binder, water dispersion of polymer and water into the composition of perlite backfill in an amount that is minimum for chemical bonding, which does not impair the flowability of the resulting mixture during the manufacture of the plates and, due to subsequent hardening, increase the structural strength of the finished pressed plate to a level at which degradation in operating conditions does not occur (table 1). The composition of the mixture for backfill, wt.%, Is given below:

- expanded perlite sand (fine and dusty) - 80 ... 70;

- mineral astringent - 16.9 ... 23.5;

- water dispersion of the polymer is 0.1 ... 0.5;

- water - 3 ... 6.

- The inclusion in the shell of a polymer film of a metallized layer that reflects at least 90% of the radiant energy.

Table 1 Physicotechnical properties of heat-insulating boards The density of the plate after prepress, kg / m ³ Compressive strength, MPa Thermal conductivity at (20 ± 5) ° С, W / (m · K) 150 0,063 0,045 175 0,086 0,050 200 0,112 0,055 225 0.140 0,060

Claims (2)

1. The heat-insulating plate made of fine-grained expanded perlite, placed in a shell of a polymer film, characterized in that the perlite component of the plate includes additives of mineral binder, water dispersion of the polymer and water in a minimum amount. 2. The plate according to claim 1, characterized in that the shell of the polymer film additionally has a layer that reflects radiant energy.