Process for extruding a puncture sealant and forming an elastome

Details Process for extruding a puncture sealant and forming an elastome Process for extruding a puncture sealant and forming an elastome

1987-08-27

1989-03-28

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

15624423, 15624424, 152502, 152504, 152505, B29C 4700, B32B 3130

Patent

active

048161012

ABSTRACT:
A process is disclosed for extruding a flat strip of uniformly thick sealant stock from an extruder which extrudes the sealant stock with a rotary helical action. The stock consists essentially of a vulcanizable mixture of a high molecular weight (mol wt) elastomer, a low mol wt elastomer, a curing agent and a processing aid selected from a tackifier and a homogenizer. The strip is less than about 10 mm thick, and at least 10 times as wide as it is thick. The stock does not flow and cannot be poured even at 212.degree. F. The stock is supplied to the extruder by a reciprocating pump which maintains an intermittent pressure yet provides the required uniform thickness of strip. Each component of the stock strongly adheres to any surface, to all metal surfaces and to each other, making it difficult to obtain a homogeneous mixture. The rate at which the strip is discharged from the extruder is maintained substantially constant, and its thickness controlled by the speed of a horizontal endless belt conveyor onto which the vertically hanging strip is continuously discharged. A spray coating of aqueous polyvinyl alcohol, which is then dried, leaves a detackified surface without which the extrudate could not be handled.

REFERENCES:
patent: 3903947 (1975-09-01), Emerson
patent: 4359078 (1952-11-01), Egan
patent: 4388261 (1983-06-01), Codispoti et al.
patent: 4665963 (1987-05-01), Timar et al.

Affiliated with

Also associated with

Rating

Process for extruding a puncture sealant and forming an elastome does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for extruding a puncture sealant and forming an elastome, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for extruding a puncture sealant and forming an elastome will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1657083