Landec Corporation

Other

Andrew W Larson

Steven P Bitler

Edward E Schmitt

Ray F Stewart

David A Kamp

David D Taft

Raymond Clarke

Valentine Y Yoon

Lawrence C Greene

Thomas W Ross

Ross S Tsugita

Donald A Schultz

Steven James

Sealed packages of foodstuffs which are biological materials, particularly fruit, are vented by a temperature-sensitive control unit. The control unit covers an aperture in a wall of the package. The control unit includes a barrier member which is secured over the aperture by a layer of temperature sensitive adhesive, and a force member which lifts the barrier member away from the aperture when an increase in temperature weakens the adhesive. The force member is preferably elastically deformed.

Temperature-responsive containers

Orthopedic casts which comprise an elastically deformed support which is held in its elastically deformed state by a solid casting composition. After the cast has been placed around a patient's limb, it is heated to soften the casting composition, thus permitting recovery of the cast into conforming contact with the limb. The support can for example be a fabric knitted from elastomeric fibers and glass fiber yarns. The casting composition can for example comprise polycaprolactone and/or a side chain crystallizable polymer, which melts at 45.degree.-60.degree. C. A padded liner can be placed between the cast and the limb. Recovery of the cast is preferably carried out by means of a hot air gun.

Method of forming an orthopedic cast

Orthopedic casts

Pressure-sensitive adhesive (PSA) compositions containing a crystalline polymeric additive having an M.sub.w of less than 25,000 and a melting point (T.sub.a) greater than 23.degree. C., preferably 30.degree. to 60.degree. , and PSA composites of a backing, preferably a flexible backing, with such a PSA composition coated thereon. The presence of the additive causes the PSA to lose adhesive strength when heated to T.sub.a. The base resin of the PSA is preferably a polyacrylate or a styrene/butadiene copolymer. The additive, which is preferably present in amount 1 to 35%, e.g. 5 to 30%, is preferably a side chain crystallizable (SCC) polymer.

Pressure-sensitive adhesives

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Palo Alto, CA, United States of America

Andrew W Larson