Oji Yuka Goseishi Co., Ltd.

Harumitsu Asazuma

Hiroshi Koyama

Masaaki Yamanaka

Masayuki Inoue

An illuminated sign board which comprises a film having printing, a frame, and a light source is described. The film is a semi-transparent film made of a stretched resin film containing a finely divided powder of a white inorganic material. The semi-transparent film satisfies the following requirements (1) to (4):

Illuminated signboard

A thermal recording material comprising (1) a synthetic paper support having on one side thereof (2) a thermal color forming layer, the support comprising (B) a biaxially stretched resin film as a base layer having (A) a uniaxially stretched thermoplastic resin film containing from 1 to 8% by weight calcium carbonate powder as a calcium carbon powder containing layer on one side thereof, and (C) a uniaxially stretched thermoplastic resin film containing from 15 to 55% by weight inorganic fine powder as a back surface layer on the other side thereof, the thermal color forming layer being provided on the calcium carbon powder containing layer (A), in which (i) the support has an opacity of not more than 45% as measured according to JIS P-8138, (ii) the calcium carbon powder containing layer (A) has a Bekk's index of from 1,000 to 3,500 seconds and a center-line average roughness (Ra) of not more than 0.5 .mu.m, (iii) the back surface layer (C) has a Bekk's index of from 100 to 900 seconds and a center-line average roughness (Ra) of from 0.6 to 1 .mu.m, and (iv) the support has a density of from 0.91 to 1.1 g/cm.sup.3 as measured according to JIS P-8118. The thermal recording material has improved image definition, including dot reproducibility, is suitable for diazo copying and high-speed printing, and can be written on with a pencil.

Thermal recording material

A support for thermosensitive recording paper, said support being synthetic paper composed of a laminated film comprising a base layer composed of a biaxially stretched resin film and a paper-like layer composed of a uniaxially stretched film of a thermoplastic resin containing 10 to 50% by weight of calcium carbonate powder in a support made of synthetic paper and to be coated with a thermosensitive color forming layer and said support meeting the following physical properties (i) to (iii):

Support for thermosensitive recording paper

Synthetic paper of multilayer resin films is described, comprising a base layer (1a) constituted by a biaxially stretched film made of the thermoplastic resin, and a laminate provided onto at least one of opposite surfaces of said base layer, said laminate including a paper-like layer (1b) and a surface layer (1c), said paper-like layer being constituted by a uniaxially stretched film made of a thermoplastic resin containing 8 to 65% by weight of inorganic fine powder, said surface layer being constituted by a uniaxially stretched film made of a thermoplastic resin, said surface layer having a thickness t satisfying the following expression

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Ibaraki, Japan

Harumitsu Asazuma