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US 4,783,300 AGranted
Vibrating damping materials and method for continuous production
AssigneeWardle Storeys PLC
InventorWalter Grunwell
Life of this patent
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Abstract
Disclosed is a self-adhesive sheet of vibration damping and sound insulating material composed of a vinyl acetate homopolymer material together with a filler, a plasticiser, and a mineral filler in an amount up to 80% by weight wherein the composition comprises not more than 20% micaceous material by weight. The sheet is produced by a continuous process wherein mixing occurs at 170.degree. C. to 190.degree. C. and the continuous sheet is formed at 60.degree. C. to 120.degree. C.
Claims7
A method of manufacturing a polymeric, profiled sheet for vibration damping and sound insulation, comprising the steps of:
- (a) feeding continuously to a continuous mixer a polymer material consisting of a vinyl acetate homopolymer, together with a plasticiser, and a mineral filler material in an amount up to 80% by weight of the total composition;
- (b) passing said vinyl acetate polymer material, said filler, and said plasticiser continuously through said continuous mixer to produce a homogeneous mixture thereof wherein said materials are well dispersed in said homogeneous mixture;
- (c) heating said mixture to a temperature of from 170.degree. C. to 190.degree. C. as said mixture passes through said continuous mixer;
- (d) continuously delivering said heated mixture from said continuous mixer to heated sheet forming means, said sheet forming means comprising a pair of calender rolls heated to a temperature of from 60.degree. C. to 120.degree. C.;
- and
- (e) forming a profiled sheet continuously from said mixture in said heated sheet forming means.
3 more elements
Dependencies are inferred from the claim text.