<?;xml version="1.0" encoding="utf-8"?> Adhesive plastic

Adhesive plastic

ADHESIVE PLASTIC FOR THREE-LAYER COVERING SYSTEM OF PIPES (3PE) provides durable adhesion between epoxy primer and outer PE protective layer. It is applied to pipes covered by epoxy primer according to the extrusion method. It has strong adhesion both to epoxy primer already solidified and to that being in the process of solidification, for instance Scotchkote 226N Slow 11G, Primer L4098, InfralitEP 8024-07, OXTEK-3 primer.

Adhesive plastic characteristics:

Typical properties

Value

Test methods

Density, g/cm³

0.94

GOST 15139

Melt flow index (190º C, 2.16 kg), g/10 min.

1.8-2.5

GOST 11645

Tensile strength, MPa, min.

12

GOST 11262

Relative elongation, %, min.

450

GOST 11262

Softening temperature, Vicat, ºC, min.

90

GOST 15088

Adhesion to epoxy primer, N/cm of length, min. at test temperatures:

 

 GOST 411

Method A

  + (20±5)ºC

180

  + (60±3)ºC

110

  + (80±3)ºC

70

Examples of plastic adhesive characteristics* on steel: 

Typical properties

Norm for three-layer covering

Adhesion to steel, N/cm of length at test temperatures:

 

  + (20±5)º C

170

  + (60±3)º C

100

  + (80±3)º 

70

Adhesion lowering to steel, % of initial value, max. after 1000 hrs exposure in water at temperatures:

 

  + (20±5)º 

25

  + (60±3)º C

30

Area of layer cathodic delamination, max. cm² after 30 days of tests in 3 % NaCl solution at the following temperatures:

 

  + (20±5)º C

3,5

  + (60±3)º C

8,5


*As Epoxy primer Scotchkote 226N Slow 11 G (0.1 mm), adhesive plastic (0.2 mm) was used. As outer protective layer: HDPE 273-79 (2 mm).