| 摘要 |
Multi layer tube of polyolefin characterized by at least two layers, concentric to tube centre line, of different material, where inner layer (i) of the tube is of polyolefin selected group consisting of low density polyethylene (a) of density 0,910 up to 0,930 g/cm<3>, linear low density polyethylene (b) of 0,915 up to 0,940 g/cm<3>, high density polyethylene (c) of 0,940 up to 0,975 g/cm<3> density and isotactic polypropylene (d). The second layer (ii) outwards the centre line of tube is a mixture of polyolefins containing 50 % of mass polyolefin elements which creates inner layer of tube and at most 50 % low density polyethylene (a) of 0,910 up to 0,930 g/cm<3> density and/or linear low density polyethylene (b) of 0,915 up to 0,940 g/cm<3> and/or high density polyethylene (c) of 0,940 up to 0,975 g/cm<3> density and/or izotactic polypropylene (d).
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