52.
    发明专利
    未知

    公开(公告)号:DE69412023T2

    公开(公告)日:1999-01-28

    申请号:DE69412023

    申请日:1994-04-22

    Abstract: This invention discloses heat-sensitive stencil paper and a production method thereof. Since no adhesive is used in this paper, the permeability to printing ink is not affected, and thus high-quality prints are obtained. The elimination of the use of adhesive prevents the decrease in resistance to ink, the adhesion to a thermal head, and emission of toxicious chlorine and improves the stability of film coating and productivity. This stencil paper is obtained by thermally bonding a polyester film and a porous support comprising a polyester fiber and co-stretching them, and the peel strength between the film and the porous support is at least 1 g/cm. Accordingly, prints obtained by stencil printing have very high quality.

    55.
    发明专利
    未知

    公开(公告)号:DE69117707D1

    公开(公告)日:1996-04-11

    申请号:DE69117707

    申请日:1991-12-20

    Abstract: A polyester film comprises a polyester whose dicarboxylic acid copolymerized component contains (i) an aromatic dicarboxylic acid having a metal sulfonate and/or a derivative thereof and (ii) a polyetherdicarboxylic acid represented by the following chemical formula (a) and having a mean molecular weight in the range of 600 to 20,000 and/or a derivative thereof. R OOCCH2-(O-R )n -OCH2 COOR (a) where, "R " and "R " are hydrogen or C1 - 8 alkyl groups, "R " is a C2-8 alkylene group and "n" is a positive integer. The polyester film can be used as a base film for a photosensitive material.

    57.
    发明专利
    未知

    公开(公告)号:DE3785204T2

    公开(公告)日:1993-11-04

    申请号:DE3785204

    申请日:1987-09-02

    Abstract: A film for thermal porous printing paper and a thermal porous printing paper composed of the film and a porous support are disclosed. The film comprises a biaxially oriented polyester film having a crystal melting energy, Delta Hu, of 3 to 11 cal/g and showing a difference between the crystal melting completion temperature and crystal melting initiation temperature, delta Tm, of 50 to 100 deg.C. Hence it has such a high heat sensitivity that characters and solid images are distinctly recorded with substantially no unevenness in thickness or density of the images. In addition, since it eliminates the necessity of reducing the thickness of the film.

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