A supportive wrapping for a surgical support or orthopedic cast is produced by providing a bandage material which is impregnated or coated with a molten polyurethane polymer that is crystallizable in a predetermined, delayed time period at room temperatures or at temperatures tolerable to human skin and permitting the polyurethane polymer to crystallize on the bandage material to form a strong, supportive, self adhered wrapping while standing at or cooling to room temperature.
A cast material comprising a filled crystalline polyurethane is disclosed. The filler is present in an amount of from 30% to 60% by weight composition. The filler comprises from 20% to 60% by weight of calcium metasilicate fibers and from 40.degree. C. to 85.degree. C. by weight of silica.
The invention relates to a thermoplastic casting material, especially a thermoplastic casting material for orthopedic and other medical applications for immobilization of extremities and/or joints, that comprise a first textile fabric, a thermoplastic polymer applied to the first textile fabric and at least one second textile fabric applied to this composite. Additionally, the invention relates to a method for the production of this thermoplastic casting material that comprises the following steps: a) application of a thermoplastic polymer on a first textile fabric and b) application of at least one second textile fabric on the first textile fabric from step a) provided with the thermoplastic polymer.
Cold-seal adhesives are disclosed that contain no natural rubber and are able of forming dry content on stretchable fabric strips which adhere to one another with acceptable strength at room temperature by pressure contact to form cohesive surgical bandages, but also allow such strips to be reeled into rolls and stored for extended periods of time without blocking. Such cold-seal adhesives are aqueous dispersions having a Zahn Cup #2 viscosity between 16-40 seconds containing 30 to 50 percent solids content of a polyurethane ionomer reaction product of 50-80% polyester polyol, 15-25% aliphatic diisocyanate and 3-6% dimethylol propionic acid neutralized with a base selected from tertiary amines and alkali metal hydroxides and the reaction product possesses a T.sub.g of between about -20.degree. to 5.degree. C.
Combinations of materials in composite form, which are thermoadhesive to themselves by treatment at temperatures not exceeding 90.degree. C. and which can be shaped in the form of a laminate at said temperature, are characterized in that they comprise an open mesh textile substrate first impregnated or coated with a first rubber-like elastoviscous constituent having a softening point not exceeding 90.degree. C. and further coated with a second, semi crystalline constituent essentially of polyester type having a fusion temperature from 35.degree. to 80.degree. C. These combinations have controlled adhesiveness and adequate fluidity for easy application by hand, particularly in do-it-yourself applications, orthopedics, sport and physiotherapy.
An orthopedic cast material having a thermoplastic material and provided with a quantity of (poly)ethylene oxide applied thereto to prevent adherence of adjacent convolutions of the cast material when it is in the form of a roll and is immersed in hot water prior to being wrapped on a limb or body part of a patient. The (poly)ethylene oxide can be in the form of a coating on the outer surface of the cast material or in the resin of the cast material.
