CS244368B1 - Method of production of assembled parts made of polyurethane - Google Patents

Abstract

The solution concerns a method of manufacturing and assembling a roof panel made of waste polyurethane foam fragments and polyurethane foam reaction components, which connect the fragments, form a panel and foam the upper waterproofing layer of a fusible strip, as well as a reinforcing cardboard coating on the lower part of the panel with a thickness of 5 to 30 cm and a weight of at least 40 kg/m\ After placing the panels on the roof, the tape joints are glued over and the remaining one or two asphalt strips are not melted, depending on the roof slope. Other waterproofing and protective materials can also be used for the covering layers of the panel, such as rubber foils, sheets, etc.

Description

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Method of production of assembled parts from polyurethane

The present invention relates to a method for manufacturing and assembling a roof panel made of waste foam polyurethane fragments and foam polyurethane reactants which interconnect the fragments to form the panel and to adhere the upper waterproofing layer of the fusible strip as well as a reinforcing cardboard coating on up to 30 cm and min. 40 kg / m

After placing the components on the roof, the joints of the tape are sealed and the remaining one or two asphalt strips do not melt, depending on the roof slope.

Other waterproofing and protective materials such as rubber foils, sheets and the like can be used for the covering layers of the panel.

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The invention relates to a method for manufacturing a completed polyurethane panel having a waterproof coating on the top side and a reinforcing layer on the bottom side.

The hitherto known assembled thermal insulating roof tiles are most often produced in two separate manufacturing operations.

In the first stage, thermal insulation boards / on which the one-sided asphalted strip is glued in the next stage. For this purpose an asphalted strip with thin covering asphalt layers of thickness less than 1 mm is used. in liquid state.

Another way of assembling and production of the component is carried out by an asphalted strip, provided on one side with an asphalt coating of a thickness of more than 1 mm. The specially produced thermal insulating component is connected to the asphalted strip by pressure into a previously melted asphalt layer

Due to the small thickness of the covering layer and the cardboard carrier, both types of strips are absorbent, dimensionally unstable, they cannot fulfill the waterproofing function in the long term, they do not allow direct melting of other layers, they cannot be reliably to ensure watertightness in the joints and for this reason the layers on the tiles are not included in the waterproofing composition of the covering. Due to the moisture of the base layers, the strips ripple in the joints between the panels.

According to the patent documentation, another method of manufacturing a thermally insulating component made of foamed polyurethane granules and assembled with liners with rubber adhesive is known.

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Also, this method of manufacturing the assembled part requires an additional working operation and the quality of the adhesive layers is not uniform.

The production of the assembled thermal insulation panel made of polyurethane foam, among the cover layers, is another known technology.

In this case, it is a product requiring a large consumption of deficit raw material and none of the finishes form a waterproofing coating.

The above-mentioned drawbacks are eliminated by the subject of the invention, which is a method of manufacturing assembled polyurethane panels / characterized by fitting a reinforcing and waterproofing coating into a horizontal or vertical mold, pouring 30-80% fragments of waste polyurethane waste. - 70% of the reactants of the foamed polyurethane, so that during the foaming process the fragments of the polyurethane are evenly dispersed and a 50 - 300 mm thick panel with a polyurethane density of min. 40kg.m.

The top layer of the panel may consist of a fusible asphalt strip, rubber foils, plastic foils, optionally a profiled or straight sheet.

Advantages of the proposed solution consist in the method of production of the assembled part, which takes place in one operation simultaneously with foaming with low consumption of polyurethane. For the production of the insulating part it is advantageous to use unwanted waste fragments of polyurethane which have otherwise difficult to dispose. Both sides of the panel reduce its dimensional changes, waterproofing coatings create a partial or complete waterproofing layer.The sealable asphalt strip after waterproofing of joints is included in the number of layers of the covering covering and forms a suitable subcloth for direct melting of other waterproofing layers. after sealing the joints, form a final waterproofing layer. In addition, the protective layers prevent undesirable increase in polyurethane moisture during tmsport and its incorporation into the roof structure.

Claims (1)

SUBJECT OF THE INVENTION 244 368 Process for the production of assembled polyurethane panels 50 to 300 mm thick with a polyurethane density of at least 40 kg.in characterized in that the horizontal or vertical mold is fitted with a reinforcing and waterproofing coating, pouring 30 to 80% of waste foam polyurethane waste with a maximum size up to 90 and 20 to 70% of polyurethane foam reactants.