Heat shrinkable moulding fabrics for forming - using pvc-pva graft

摘要

Fibrous moulding materials of mould draw ratio 50.125 incorporate =30 wt.% of fibres (A) having =15, pref. =30%, potential thermal contraction. Pref. moulding fabric is coated with a thermoplastic film with similar hot retraction props. Pref. (A) are prepd. from a soln. of PVA and an aqs. emulsion of PVC with subsequent hot drawing and acetylisation. Used for moulding upholstery covers, camera jackets, lens boxes etc.