Method for reducing the aging period of polyethylene foams

Details Method for reducing the aging period of polyethylene foams Method for reducing the aging period of polyethylene foams

1979-06-18

1981-06-09

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

2642107, 264DIG15, B29D 2700

Patent

active

042724686

ABSTRACT:
A method for reducing the aging period of foams produced using a gaseous expansion agent is disclosed which includes biaxial orientation of the thermoplastic polymer foam. The foam is cooled after it is extruded and blown up from a tubular die, the cooling being to a temperature at least 40.degree. C. below its melting point. Thereafter, the foam is biaxially oriented to a dimension at least 25% greater in both radial and axial directions than the dimensions of the extruded, blown up, cooled foam.

REFERENCES:
patent: 3248462 (1966-04-01), Merrill et al.
patent: 3275720 (1966-09-01), Ohsol
patent: 3466356 (1969-09-01), Carlson et al.
patent: 3488746 (1970-01-01), Gilbert
patent: 3558532 (1971-01-01), Sundquist et al.
patent: 4150077 (1979-04-01), Slocumb
Encyclopedia of Polymer Science and Technology, vol. 2, 1965 pp. 344-373.
Collins, F. H. "Controlled Density Polystyrene Foam Extrusion" In SPE Journal, Jul. 1960, pp. 705-709.

Affiliated with

Also associated with

Rating

Method for reducing the aging period of polyethylene foams does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for reducing the aging period of polyethylene foams, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for reducing the aging period of polyethylene foams will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1263454