Yupo Corporation

Oji-yuka Synthetic Paper Co., Ltd.

Ichiro Ohkawachi

Hiroshi Koike

Kenji Nakajima

Nobuhiro Shibuya

Akira Iwai

Tomotsugu Takahashi

Tamio Shikano

Minoru Kato

Tsukasa Satoh

This invention provides printing paper which comprises an aliphatic polyester resin utilizing a plant resource-derived biomass material, is excellent, for example, in traveling stability on a printing machine, material strength, reproduction of dots, print sharpness, and waterfastness and is suitable for use in applications where sheet offset printing is carried out, for example, commercial printing applications such as outdoor posters and maps, catalogs, pamphlets, and menues, and a label using the same. The printing paper is a film formed of an aliphatic polyester resin composition comprising 40 to 90% by weight of an aliphatic polyester resin (a) comprising a binary or higher material of aliphatic diol units represented by formula (I) and aliphatic dicarboxylic acid units represented by formula (II) and 60 to 10% by weight of an inorganic fine powder (b). The film has a Gurley stiffness of 50 to 3,000 mg, a surface area S, per projected area 4,292 &#x3bc;m, of the film surface of 5,000 to 50,000 &#x3bc;m, and a convex part volume V, per projected area 4,292 &#x3bc;m, of the film surface of 2,000 to 20,000 &#x3bc;m: &#x2014;O&#x2014;(CH)&#x2014;O&#x2014; . . . (I) wherein m is an integer of 2 to 10; and &#x2014;CO&#x2014;(CH)&#x2014;CO&#x2014; . . . (II) wherein n is an integer of 1 to 12.

Printing paper

A thermoplastic resin film (i) which has a degree of dimensional change through heating and cooling (&#x3b1;) in the range of from &#x2212;2% to 2% as measured by thermomechanical analysis in the range of from room temperature to 135&#xb0; C., or which has a degree of thermal shrinkage of 1.8% or lower upon heating at 130&#xb0; C. for 30 minutes or longer; and a label paper employing the same. The label paper has suitability for heated-roll fixing type electrophotographic printers and is satisfactory in curling after printing.

Thermoplastic resin film and label paper employing the same

A label paper including a thermoplastic resin sheet (A) formed by stretching along at least one axis and heat treating at 50 to 250&#xb0; C., an adhesive layer (B), and a release paper (C). Under a thermomechanical analysis with heating from a room temperature to 150&#xb0; C., &#x3b1; is in a range of from &#x2212;2.5 to 2.5 percent, and &#x3b1;-&#x3b2; is in a range of from &#x2212;1.5 to 1.5 percent, where &#x3b1; is a ratio of a dimension of the thermoplastic resin sheet (A) after the heating to a dimension of the thermoplastic resin sheet (A) before the heating, and &#x3b2; is a ratio of a dimension of the release paper (C) after the heating to a dimension of the release paper (C) before the heating.

Electrophotographic recording sheet and label paper

A stretched resin film having as a base material a resin composition composed of the following components (A), (B), (C) and (D):

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Ibaraki, Japan

Ichiro Ohkawachi