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Title:
FLEXIBLE ELASTIC POLYURETHANE FILM, METHOD FOR PRODUCING THE SAME AND USE THEREOF
Document Type and Number:
Japanese Patent JP2001055457
Kind Code:
A
Abstract:

To obtain a material that can be formed into film with a sintering process even at a low processing temperature by a method for sintering a powdery thermoplastic polyurethane having a melt index, a relative solution viscosity and a Shore hardness within specific ranges, respectively.

This flexible elastic polyurethane (TPU) film is obtained by a method comprising sintering at least one kind of powdery thermoplastic polyurethane having a melt index of 20 to 100, preferably 30 to 60, a relative solution viscosity of 1.15 to 1.45, preferably 1.25 to 1.35, and a Shore hardness of 80 to 98, preferably 85 to 94, when a load of 21.2N is applied at 190°C in a heated mold. The powdery thermoplastic polyurethane can be obtained by the reaction of an organic diisocyanate, a polyol, a chain extender, if necessary, a conventional auxiliary substance and a conventional additive by the help of a heated mold. The sintering of the TPU is preferably carried out at a mold temperature of 180 to 215°C, especially 190 to 210°C.


Inventors:
KAUFHOLD WOLFGANG (DE)
HOPPE HANS-GEORG (DE)
WINKLER JURGEN (DE)
BRAUER WOLFGANG (DE)
WUSSOW HANS-GEORG (DE)
Application Number:
JP2000209536A
Publication Date:
February 27, 2001
Filing Date:
July 11, 2000
Export Citation:
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Assignee:
BAYER AG (DE)
International Classes:
C08G18/08; C08G18/40; C08J5/18; C08G18/42; C08G18/44; C08G18/66; C08G18/72; C08G18/73; C08L75/04; (IPC1-7): C08J5/18
Domestic Patent References:
JPH06206973A1994-07-26
Attorney, Agent or Firm:
Heiyoshi Odashima