# US 5,707,712 A · Thermosensitive stencil paper and the method of producing the same

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- Number: US 5,707,712 A
- Document ID: US5707712A
- Status: Granted
- Kind: A
- Application number: 08/603,598
- Filed: 1996-02-21
- Granted: 1998-01-13
- Earliest claimed: 1995-02-22
- Assignees: Ricoh Company, Ltd.; Tohoku Ricoh Co., Ltd.
- Inventors: Manabu Fujimura; Fumiaki Arai; Hideyuki Yamaguchi; Masayuki Ohta
- Web page: https://patentgrep.com/patent/US5707712A

## CPC

- B41N 1/245: {characterised by the thermo-perforable polymeric film heat absorbing means or release coating therefor}
- Y10S 428/913: Material designed to be responsive to temperature, light, moisture
- Y10T 428/24802: Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- Y10T 428/31504: Composite [nonstructural laminate]
- Y10T 428/31993: Of paper
- B41N: PRINTING PLATES OR FOILS (photosensitive material G03); MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A thermosensitive stencil paper includes a thermoplastic resin film, and optionally a porous support for supporting the resin film thereon, and a silicone oil containing layer formed the resin film, which contains at least one modified silicone oil component selected from the group consisting of (a) an ether.cndot.epoxy-modified silicone oil having both an epoxy group and an ether group and (b) an ether-modified silicone oil with HLB of 6 or less. The above thermosensitive stencil paper can be produced by coating a coating liquid which contains at least one of the above-mentioned modified silicone oils in an amount of 2.0 g/m.sup.2 or less before the drying of the coating liquid.

## Claims

### Claim 1

A thermosensitive stencil paper comprising a thermoplastic resin film, and a modified silicone oil containing layer formed thereon which comprises at least one modified silicone oil component selected from group consisting of (a) an ether.cndot.epoxy-modified silicone oil having both an epoxy group and an ether group and (b) an ether-modified silicone oil with HLB of 6 or less.

### Claim 2 (depends on 1)

The thermosensitive stencil paper as claimed in claim 1, further comprising a porous support for supporting thereon said thermoplastic resin film.

### Claim 3 (depends on 1)

The thermosensitive stencil paper as claimed in claim 1, wherein said modified silicone oil containing layer provided on said thermoplastic resin film is in a deposition amount in the range of 0.005 to 0.5 g/m.sup.2 on a dry basis.

### Claim 4

A method of producing a thermosensitive stencil paper comprising a thermoplastic resin film, and a modified silicone oil containing layer formed thereon which comprises at least one modified silicone oil component selected from the group consisting of (a) an ether.cndot.epoxy-modified silicone oil having both an epoxy group and an ether group and (a) an ether modified silicone oil with HLB of 6 or less, comprising the step of coating said thermoplastic resin film with a coating liquid comprising at least one modified silicone oil component selected from the group consisting of (a) an ether.cndot.epoxy-modified silicone oil having both an epoxy group and an ether group and (b) an ether-modified silicone oil with HLB of 6 or less, in an amount of 2.0 g/m.sup.2 or less before the drying of said coating liquid.

### Claim 5 (depends on 4)

The method as claimed in claim 4, wherein said thermosensitive stencil paper further comprises a porous support for supporting said thermoplastic resin film thereon.