SU1020253A1 - Laminate material - Google Patents

Abstract

LAYERED MATERIAL, inclusive of a layer made of metal, a layer of polyethylene and an adhesive layer of phpolimgradtilen with vinyl acetate located between them, and with the fact that, with the aim of considering inter-adhesion , the adhesion layer is made of a two-layer {s and at the end of the 9e; ny winnatsettat in the layer, with its extension; to the polyethylene, 6–11 wt.%, and in the layer, adjacent to the metal, 25–30 wt.%.

Description

The invention relates to laminated materials containing layers of metal bonded to layers of polymeric materials. A laminate is known that contains a layer made of metalL1a and a layer of polyethylene, ethylene copolymer with vnniatsetatat (GiA) and a plasticizer, bonded to each other by an adhesive layer, made of ethylene copolymer with 25 wt.% Vinyl acetate Cl} "The disadvantage of pan laminate - relative to NiCa interlayer adhesion. The closest to the technical essence and the achieved positive effect to the proposed is a layered material containing a layer of metal and a polyethylene layer with an adhesive layer between them of ethylene-VA copolymer containing 20 wt.% VA tZJ. The disadvantage of this material is the low interlayer confinement. The purpose of the invention is to increase the layered. The goal is achieved by T & that in the layered material, the closing layer, B () is molten from metal. a layer of polyethylene and an adhesive layer between them of ethylene copolymer with vinil acetate (EVA), the adhesive layer is made two-layer with a concentration of vinyl acetate units in the layer adjacent to the polyethylene, 6-11 wt.%, and in the layer adjacent to the metal, 253 O weight.%. The first adhesive layer of a CEA with a high concentration of VA (25-30 wt.%) In the form of a thin film with a thickness of 10-100 μm is deposited on the metal by thermal contact or cladding with a preheated metal surface. The second layer of EVA with a low concentration of VA (from 6 to 11 wt.%), As well as the main layer of polyethylene, were alternately deposited on the first layer of teE "chemical contacting, which was carried out at 120160С, the contact time was 30120 s. The proposed layered material was tested under laboratory conditions. C determined the change in the values of resistance to delamination of pairs of adhesive joints of steel - EVA and BA-PE depending on temperature, duration of contact and concentration of vinyl acetate units in SZEA (see table).

120

St. || L-SEVA

140

0.3 0.4 0.7 2.0 3.0 0.7 0.8

1.1 3.8

4.1

 The center is VA in the CEA, the concept of the prototype.

From the data given in the table compared with the known. In adhesion

c% it can be seen that at the concentration of BA60 in the PE-EVA system at the concentration, and the EVA of 30%. resistance of the precipitate BA in the CEBA b wt.% resistance to melting in the steel-SZVA system to delamination compared to lime at all temperatures and times higher by S-6 times. Contact resistance (Yuvani in the proposed adhesive delamination adhesive compound

This yoke material is 4-5 times higher on the EVA -. provided that

Continued Table1P1

VA concentration in C & BA 6 wt. The concentration of BA in EVA is 30% by weight, 4-5 kgf / cm.

VP and Measure 1. Package consisting of a degreased steel sheet (or foil), a EVA film with a thickness of 100 µm and a BA content of 25 wt.%,

EVA films with a thickness of 100 μm with a BA content of 11% by weight and a low-density polyethylene base film held under pressure of at least 2 Kr / CM i were heated by press plates for 2 minutes. The peeling strength of the polymer layer is 4.1 kgf / cm.

EXAMPLE 2 Electrochemically digested and heated to a strap with a plaster film with ethylene-vinyl acetate copolymer film {film thickness 100 μm, BA content 30 wt.%). Basic coverage in

co-extruded polyethylene double layer film

high pressure and a copolymer of ethylene with vinyl acetate (content of BA 6 wt.%), applied short-term thermal contact for 30 seconds ;. in such a way that the layers of ethylene-vinyl acetate copolymer face each other. The peeling strength of the polymer | Go layer is 5.4 kgf / cm.

Thus, the proposed laminate using the EVA-based two-layer intermediate adhesive layer makes it possible to increase the peeling strength of the polymer coating by a factor of 475 compared to limestone). At the same time

: improvement in operational performance is achieved.

Claims (1)

LAYERED MATERIAL, including a layer made of metal, a layer of polyethylene and an adhesive layer located between them. From a copolymer of ethylene with vinyl acetate, from the same as with * so as to increase the interlayer adhesion, the adhesive layer is made two-layer at a concentration of vinyl acetate units in the layer adjacent to the polyethylene, 6-11 wt.%, and in the layer adjacent to the metal, 25-30 wt.%.