Thermal mimeograph paper

• US 5,270,099 A
• Filed: 10/02/1991
• Issued: 12/14/1993
• Est. Priority Date: 12/22/1989
• Status: Expired due to Fees

• Current Assignee: Dai Nippon Printing Company Limited
• Original Assignee: Dai Nippon Printing Company Limited
• Inventors: Komatsubara, Kazue, Sakano, Shinichi, Hiroi, Junichi, Kamiyama, Hironori, Yamashita, Yudai, Kosaka, Yozo, Ando, Masayuki, Tsuchiya, Mitsuru
• Primary Examiner(s): Ryan, Patrick J.
• Assistant Examiner(s): MULVANEY, ELIZABETH EVANS
• Application Number:
  US07/743,401
• Time in Patent Office: 804 Days
• Field of Search: 428/137, 428/211, 428/262, 428/264, 428/290, 428/335, 428/336, 428/341, 428/342, 428/359, 428/360, 428/361, 428/413, 428/423.1, 428/537.5, 428/913, 428/198
• US Class Current: 428/195.1
• CPC Class Codes: B41N 1/241 characterised by the adhesive means
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture
• CPC Class Codes: Y10T 428/24802 Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• CPC Class Codes: Y10T 428/24826 Spot bonds connect components
• CPC Class Codes: Y10T 428/24851 Intermediate layer is discontinuous or differential
• CPC Class Codes: Y10T 428/2486 with outer strippable or release layer
• CPC Class Codes: Y10T 428/24876 Intermediate layer contains particulate material [e.g., pigment, etc.]
• CPC Class Codes: Y10T 428/24934 including paper layer
• CPC Class Codes: Y10T 428/31895 Paper or wood
• CPC Class Codes: Y10T 428/31993 Of paper

Abstract

The present invention provides a thermal mimeograph paper having a point-bonded structure and including a porous backing material and a thermoplastic resin film layer laminated on one side thereof through an adhesive, wherein the porous backing material and the thermoplastic resin film are bonded together by dotwise point bonding. This point-bonded structure enables the perforability of the mimeograph paper to be improved.

Claims

1. A thermal mimeograph paper comprising:

a porous backing material;

an adhesive layer laminated on one surface of said porous backing material;

a thermoplastic resin film layer laminated on said adhesive layer; and

a thermal fusion preventing layer laminated on said thermoplastic resin film layer, said thermal fusion preventing layer comprising an aromatic noncrystalline polyester resin having a molecular weight of about 5,000 to 30,000 and an amino-modified silicone oil.

2. A thermal mimeograph paper as claimed in claim 1, wherein said thermal fusion preventing layer further comprises an antistatic.

3. A thermal mimeograph paper as claimed in claim 1, wherein said thermal fusion preventing layer further comprises surface active agent.

4. A thermal mimeograph paper as claimed in claim 1, wherein said thermal fusion preventing layer has a thickness of 0.01 to 5 μ

m.

5. A thermal mimeograph process wherein a heat emitter element of a thin type of partially glazed thermal head generates heat in response to digital signals for images and characters to perforate a film of mimeograph paper in tune with said digital signals for stencil-making, said mimeograph paper comprising a porous backing material and a thermoplastic resin film laminated thereon through an adhesive layer, said thermoplastic resin film being a film having a thickness of 2.0 to 6.0 μ

m and said adhesive being applied at a coverage of 0.1 to 0.5 g/m² on a solid basis thereof.