Insulation product

 

(57) Abstract:

Describes thermal insulation product consisting of fittings based on rigid polyurethane foam and covering fitting multilayer foil, comprising polyethylene, and covering fitting foil vacuumed and hermetically welded, characterized in that the molded part has an apparent density of from 100 to 250 kg/m3and the resulting grinding rigid polyurethane foam with obtaining powder or flakes and binding powder or flakes with a binder based on di - and/or MDI with simultaneous or sequential extrusion and forming with subsequent release of items from volatile components by annealing at a temperature of from 50 to 250oC, preferably from 100 to 200oC. Technical result - getting ready vacuum panel, the exact size and the exact original size. 3 C.p. f-crystals.

The invention relates to a multilayer insulation products, in particular to the insulation product consisting of fittings and covering her multilayer foil.

From application EP N 0188806, CL 09 J 9/38, 1986, known insulation product consisting which includes polyethylene, and covering fitting foil vacuumed and hermetically welded.

The task of the invention to provide an insulation product, comprising the fittings on the basis of rigid polyurethane foam and covering her multilayer foil, which can be produced economically.

The problem is solved, we offer thermal insulation product consisting of fittings based on rigid polyurethane foam and covering fitting multilayer foil, comprising polyethylene, and covering fitting foil vacuumed and hermetically welded, the distinctive feature of which is that the fitting has an apparent density of 100 - 250 kg/m3and the resulting grinding rigid polyurethane foam with obtaining powder or flakes and binding powder or flakes with a binder based on di - and/or MDI with simultaneous or sequential extrusion and molding with subsequent release of items from volatile components by annealing at a temperature of from 50 to 250oC, preferably from 100 to 200oC.

Fitting may consist of rigid polyurethane foam, aplausos is retana preferably have a particle size of from 0.01 to 5 mm, in particular 0.1 to 2 mm.

Covering the fitting of the multilayer foil is preferably made of polyethylene and aluminum or polyvinyl alcohol.

Grinding rigid polyurethane foam may be, for example, by grinding, grinding or tearing. If necessary, large pieces of foam can also crush or be crushed.

Before covering with foil and vacuum the product, for example in the form of slabs of foam can be cut in condition, or milling can be performed in a corresponding recess for mounting switches, (speaker)wires or channels.

Fitting is porous. Its porosity can be adjusted, on the one hand, through the intensity of milling, on the other hand, through a honeycomb structure to be grinding polyurethane foam.

Pressing simultaneously molding is carried out in a known manner at elevated pressure (for example, 1.5 to 20 bar) and, if necessary, at an elevated temperature (e.g. 50 - 250oC). After degassing the product can be fully or partially filled with gas having a lower gas conductivity (e.g., xenon).

PU 1520 A20 by Bayer AG) in a paddle type mixer, Lodige, equipped with a two-component nozzle. The mixture is poured into the form and receive the semi-finished product size 400 x 400 mm, which is uniformly compacted and then pressed to a thickness of 20 mm in a laboratory press at a pressure of 5 bar and at a temperature of 120oC for 8 minutes using chronometric program.

Get porous plate thickness of 20 mm and an apparent density of 200 kg/m3The plate is heated to 120oC for about 2 hours to free her from all volatile components.

Plate covered with foil, consisting of layers of polyethylene/alcohol, polyvinyl alcohol/polyethylene, and vacuum up to 0.001 bar. The edges of the foil welded under vacuum. Thus obtained, the vacuum panel has a coefficient of thermal conductivity = 9 mW/MK, measured by the method of heat flows.

Vacuum panel similar quality also get when using diisocyanates selected from the group vklyuchayuschimisya, 2,6-toluylenediisocyanate, difenilmetana-2,4'-diisocyanate, difenilmetana-4,4'-diisocyanate, naftilan-1,5-diisocyanate and their mixtures, and/or polyisocyanates selected from the group comprising triphenylmethane-4,4'-triisocyanate and polyvinylpyridine-polyisocyanates produced by condensation of analine and formaldehyde and subsequent vosganian.

1. Insulation product consisting of fittings based on rigid polyurethane foam and covering fitting multilayer foil, comprising polyethylene, and covering fitting foil vacuumed and hermetically welded, characterized in that the molded part has an apparent density of 100 to 250 kg/m3and the resulting grinding rigid polyurethane foam with obtaining powder or flakes and binding powder or flakes with a binder based on di - and/or MDI with simultaneous or sequential extrusion and molding with subsequent release of items from volatile components by annealing at a temperature of from 50 to 250oC, preferably from 100 to 200oC.

2. Insulation product under item 1, characterized in that the fitting consists of a rigid polyurethane foam, which material is the, what powder or flakes rigid polyurethane foam have a particle size of from 0.01 to 5 mm

4. Thermal insulation products for PP.1 to 3, characterized in that the covering multilayer foil is made of polyethylene and aluminum or polyvinyl alcohol.

 

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