BIAXIALLY ORIENTED POLYESTER FILM FOR USE AS STENCIL PAPER FOR THERMAL STENCIL PRINTING

Title:

BIAXIALLY ORIENTED POLYESTER FILM FOR USE AS STENCIL PAPER FOR THERMAL STENCIL PRINTING

Document Type and Number:

WIPO Patent Application WO/2000/020490

Kind Code:

A1

Abstract:

A biaxially oriented polyester film which: (A) is made of a composition comprising two or more thermoplastic polyesters; (B) in DSC conducted at a heating rate of 2 °C/min with superposition of periodic temperature fluctuations of +/-1 °C/min, gives a DSC curve having at least two melting peaks in which the difference between the highest and the lowest melting peak temperatures is in the range of 5 to 20 °C and the average of the two peak temperatures is in the range of 200 to 230 °C; (C) has a thermal shrinkage through heating at 100 °C for 10 min of 16 to 25 % in each of two perpendicular directions on the plane of the film; and (D) has a thickness of 0.2 to 7 $g(m)m. The film is suitable for use as a stencil film for thermal stencil printing which gives clear prints with respect to each of character printing and solid printing, is free from dot gain or unevenness of density in printing, has excellent durability, does not rumple, and is highly sensitive to perforation.

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Inventors:

YOSHIDA TETSUO (JP)
MUROOKA HIROFUMI (JP)

Application Number:

PCT/JP1999/005342

Publication Date:

April 13, 2000

Filing Date:

September 29, 1999

Export Citation:

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Assignee:

TEIJIN LTD (JP)
YOSHIDA TETSUO (JP)
MUROOKA HIROFUMI (JP)

International Classes:

B29D7/01; B41N1/24; C08J5/18; (IPC1-7): C08J5/18; B29C55/12; B41N1/24

Foreign References:

JPH0339294A	1991-02-20
JPH06312588A	1994-11-08
JPH09220867A	1997-08-26
JPH09164782A	1997-06-24

Other References: