CZ291492A3 - Structural laminated material, particularly for roof and lining panels - Google Patents

Abstract

The structural laminate is mainly intended for the production of roof panels, imitating classic roofing and wall cladding after installation on the roof. The construction material consists of a backing layer of secondary polymer waste, in particular 1 to 8 mm thick polyvinyl chloride, to which a cover layer is attached by means of an adhesive interlayer. The requirement for atmospheric stability is due to the creamy layer of mineral pulp, such as slate or ceramic, or metal foil, e.g., copper.

Description

BACKGROUND OF THE INVENTION

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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structural laminate for use in the manufacture of roof and wall cladding panels.

BACKGROUND OF THE INVENTION

Currently, in addition to conventional materials, mostly single-layered, a number of different laminates are used for the production of piece roofing (tiles, tiles and roof panels).

Because of the priority requirement of providing waterproofing and at the same time satisfactory weathering resistance, laminated materials comprising a bitumen-based insulating layer are used in conjunction with an atmospherically resistant cover layer, or a layer of waterproofing. with or without a suitable carrier layer.

For example, a bitumen-based backing layer (optionally modified by the addition of a polymer) is known to which a copper cover foil is attached by means of an elastomeric adhesive interlayer (eg based on chlorinated rubber, neoprene, polyurethane or polyisobutylene).

Another type of material comprises a carrier polymer layer based on an elastomeric blend (polybutadiene, polyacrylonitrile or butyl rubber) containing regenerated rubber drf as a filler. This elastomeric layer is provided on one or both sides with a thin asphalt covering layer or a polyester foil.

Material designed to imitate the classic shingles comprising a substrate layer of inorganic fiber and a covering layer comprising an elastomeric block copolymer (e.g., styrene-diene _of the butane-styrene), a mixture of bitumen (e.g. asphalt impregnation) and waste rubber crumb (regenerated or not regenerated). ,

Another type of shingle roofing imitation roofing panel consists of a pair of fiberglass-based fiber layers impregnated with bitumens and a reinforcing polyamide strip interposed between the fiber layers.

A common drawback of the above-mentioned bitumen-based materials is, in particular, undesirable changes in mechanical properties due to temperature changes. At high temperatures in summer it is tendency to soften, at low temperatures in winter tendency to brittleness or cracking. It is obvious that these deficiencies can also negatively affect the insulation function of the roof itself. Another problem with these materials is flammability. In order to achieve a satisfactory condition in this respect, flame retardant additives or additives must be used. combine the bitumen layer in the product structure with other non-flammable layers. Obviously, these adjustments are always a compromise and can be negatively reflected in the performance of the product or its cost.

SUMMARY OF THE INVENTION

The structural laminate of the invention contributes to overcoming the above-mentioned drawbacks. The substance of the solution consists in that this construction material consists of a backing layer of secondary polymer waste with a thickness of 1 to 8 mm, to which a covering layer is attached by means of an adhesive intermediate layer.

In view of the requirement of resistance to atmospheric influences, the cover layer may preferably be a mineral pulp - eg slate or ceramic or metal foil - eg copper.

The structural laminate according to the invention is in comparison with the known types of laminated materials for roofing and roofing. cladding panels advantageous in particular because it is very cheap with high weathering resistance and stability of mechanical properties during normal temperature fluctuations during the year. This benefit is achieved in that the carrier layer of the material constituting a substantial part of its mass is made of inexpensive secondary polymer waste. At the same time, the use of waste brings the desired ecological effect.

DETAILED DESCRIPTION OF THE INVENTION

Example 1

The structural laminate according to the invention consists of:

(a) a backing layer based on waste polyvinyl chloride (possibly with admixture of other polymeric materials such as polyethylene, polypropylene, or rubber - the content of admixtures is given by the quality of the pre-sorting of the processed waste); the base layer thickness is 4 mm;

b) an adhesive interlayer based on copolyacrylates (formed from a dispersion of styrene-acrylate copolymers SOKRAT); the adhesive interlayer thickness is 0.5 to 1 mm;

(c) a slate crumb coating having a particle size distribution of 1 to 3 mm; the thickness of the cover layer is 0.5 to 1 mm. The covering layer can be in various colors - eg white, red, gray or black.

The production process of the above-described laminate is as follows:

(a) a backing layer is formed from the waste polymer pulp by extrusion on a screw extruder;

b) a copolyacrylate adhesive intermediate layer is applied in a dispersion onto the backing layer (with a knife or roller) in a dispersion;

in an amount of 300 to 500 g / m ² ;

c) allowing the adhesive interlayer dispersion to partially settle while being heated by the infrared heater;

(d) Slate chippings shall be applied to the adhesive interlayer at a rate of 1.3 to 1.7 kg / m ^{2 by means of a} metering device;

e) the obtained laminate is fixed by rolling on a two-roll roller with a top roller heated to a temperature of 130 to 150 ° C;

f) molded blanks (roof panels) of 800 x 400 mm are cut out of the laminated material thus produced, imitating a classic shingle covering after installation on the roof.

Example 2

The structural laminate according to the invention consists of:

(a) a backing layer based on waste polyvinyl chloride (possibly with admixture of other polymeric materials such as polyethylene, polypropylene, or rubber - the content of admixtures is given by the quality of the pre-sorting of the processed waste); the base layer thickness is 4 mm;

(b) an adhesive interlayer based on a polyurethane mixture having a thickness of 0.5 mm;

c) a copper foil-based coating having a thickness of 80 to 100 µm;

The production process of the above-described laminate is as follows:

(a) a backing layer is formed from the waste polymer pulp by extrusion on a screw extruder;

b) on the underlayer coating to the template (with a knife or roll) is embedded in a polyurethane prepolymer dispersion (intermediate adhesive layer) in an amount of 300 g / m ^2;

c) copper foil is laminated between the rolls into the adhesive interlayer;

d) shaped sheets (roof panels) are cut from the laminated material thus produced, imitating a classic copper roofing after being mounted on the roof.

Claims (6)

Structural laminate, in particular for roofing and cladding panels, characterized in that it comprises a backing layer of secondary polymeric waste having a thickness of 1 to 8 mm, to which a covering layer is attached by means of an adhesive interlayer. 2. The structural laminate of claim 1, wherein the secondary polymer waste layer is a thermoplastic polymer waste film or sheet of which polyvinyl chloride is an essential component. Structural laminate according to claim 2, characterized in that the cover layer is a mineral grit, fixed by a (co) polyacrylate adhesive interlayer. 4. The structural laminate of claim 3, wherein the mineral crush is slate or ceramic. 5. The structural laminate of claim 2, wherein the cover layer is a metal foil attached to the backing layer by a polyurethane or (co) polyacrylate adhesive interlayer. 6. The structural laminate of claim 5, wherein the metal foil is a copper foil.