Durable case formed from an expanded high-density polyethylene

Details Durable case formed from an expanded high-density polyethylene Durable case formed from an expanded high-density polyethylene

1993-06-11

1996-10-15

Shoap, Allan N.

Envelopes, wrappers, and paperboard boxes

Paperboard box

Flexible or flaccid, internal, non-bag lining formed from an...

229930, B65D 518

Patent

active

055646239

ABSTRACT:
A receptacle (10), such as an attache case or brief case, has a cover panel (22), back panel (24), front panel (26), top panel (30), bottom panel (32) opposing tabs (34) and opposing side panels (36). The case is made from a unitary sheet of expanded polyethylene. The expanded polyethylene sheet material is produced by encapsulating a thermoplastic blowing agent (azodicarbonamide) within an ethylene vinyl acetate carrier resin to form a pelletized compound which is combined with high-density polyethylene resin and extruded. The melt temperature of the pelletized blowing agent is lower than that of the polyethylene resin, and controls the expansion of the polyethylene resin.

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