B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
154/133, 154/84,
B32B 3/28 (2006.01) B32B 15/12 (2006.01) B32B 27/10 (2006.01) F16L 59/10 (2006.01)
Patent
CA 1115633
ABSTRACT OF THE DISCLOSURE The present invention provides a continuous, sheet-like, flexible covering material (sheet material) intended as a semi- finished product for wrapping round heat, cold or sound insulation on piping or the like, characterized in that the sheet material consists of a multilayer laminate containing at least two layer groups, the first group forming the outer part of the sheet mate- rial when rolled up, and containing a supporting layer consisting of a kraft paper or the like with minor extensibility, covered on its outwardly facing surface with a polyethylene layer and similar- ly on its inner surface with a polyethylene or glue layer, while the second group, forming the inner part of the material when rolled up, contains a layer consisting of a highly extensible paper or the like, e.g. "Clupak", which is given a contracting tendency due to its striving to return to its original shape, by being given a high ten- sional load during manufacture, the highly extensible paper having a polyethylene or glue layer on its surface facing towards the first layer group, said layer being bonded to the corresponding layer in the first layer group or constituting said layer, and on its surface facing the opposite direction being protected by a polyethylene lay- er, both layer groups being bonded to each other such that the sheet material has an enduring precurvature, characteristic for the sheet material.
298403
Anneflod Weimar A.
Lindberg Ulf W.
Millgardh Ulf J.
Werner Nils H.
Wimelius Bjorn
Marks & Clerk
Orebro Pappersbruks Ab
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