B - Operations – Transporting – 41 – M
Patent
B - Operations, Transporting
41
M
B41M 5/40 (2006.01) B32B 27/32 (2006.01)
Patent
CA 2551526
A biaxially oriented white polypropylene film for thermal transfer recording (first form), comprised of a polypropylene resin of 30% or higher .beta.- crystal ratio and 140 to 172~C melting temperature, characterized in that the biaxially oriented white polypropylene film has substantially non-nucleated voids, a void ratio of 30 to 80%, a sum of strengths (F2 values) at 2% elongation in the longitudinal direction and the width direction of the film of 10 to 70 MPa and a surface gloss of 10 to 145%.
L'invention concerne un film de polypropylène blanc orienté biaxialement pour l'impression par thermotransfert (première forme), se composant d'une résine de polypropylène possédant un rapport .beta.-cristal d'au moins 30 % et une température de fusion de 140 à 172 ·C. Ledit film de polypropylène blanc orienté axialement se caractérise en ce qu'il possède des vides énucléés, un rapport de vides de 30 à 80 %, une somme de résistances (valeurs F2) avec un allongement de 2 % dans le sens de la longueur et de la largeur du film de 10 à 70 Mpa et un degré de brillant de 10 à 145 %.
Masuda Jun'ichi
Morita Reiko
Ohkura Masashi
Tanaka Shigeru
Tonegawa Kouichi
Smart & Biggar
Toray Industries Inc.
LandOfFree
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