Sheet, sheet processing apparatus and sheet processing method

Patent metadata

Field	Value
Publication number	US-10759185-B2
Application number	US-201916446763-A
Country	US
Kind code	B2
Filing date	Jun 20, 2019
Priority date	Jun 22, 2018
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

A sheet for a laser printer includes a plurality of fibers, and a binding agent for binding the plurality of fibers, in which an abundance of the binding agent on a surface of the sheet is smaller than an abundance of the binding agent in a center in a thickness direction of the sheet.

First claim

What is claimed is:

1. A sheet for a laser printer, the sheet comprising:
a plurality of fibers; and
a binding agent for binding the plurality of fibers, wherein
an abundance of the binding agent on a surface of the sheet is smaller than an abundance of the binding agent in a center in a thickness direction of the sheet, and
a glass transition temperature Tg (° C.) of a resin contained in the binding agent, a temperature Ts (° C.) of the sheet after passing a heat treatment section in the laser printer, and a thickness D (μm) of the sheet satisfy a formula (1):
Tg≥Ts− 0.3× D   (1).

2. A sheet for a laser printer, the sheet comprising:
a plurality of fibers: and
a binding agent for binding the plurality of fibers, wherein
an abundance of the binding agent on a surface of the sheet is smaller than an abundance of the binding agent in a center in a thickness direction of the sheet, and
a surface resistivity Rs (Ω/□) of the sheet is 1.0×10 12 (Ω/□) or less.

3. A method for processing a sheet, comprising:
applying heat treatment to a sheet including a plurality of fibers, and a binding agent for binding the plurality of fibers, wherein
a glass transition temperature Tg (° C.) of a resin contained in the binding agent, a temperature Ts (° C.) of the sheet after the heat treatment, and a thickness D (μm) of the sheet satisfy a formula ( 1 ):
Tg≥Ts− 0.3× D   (1).

4. The method for processing a sheet according to claim 3 , wherein the plurality of fibers are bound by the applying heat treatment.

5. The method for processing a sheet according to claim 3 , wherein a toner is fixed to the sheet by the applying heat treatment.

6. A sheet processing apparatus, comprising:
a heat treatment section that applies heat to a sheet which includes a plurality of fibers, and a binding agent for binding the plurality of fibers, wherein
a glass transition temperature Tg (° C.) of a resin contained in the binding agent, a temperature Ts (° C.) of the sheet after passing the heat treatment section, and a thickness D (μm) of the sheet satisfy a formula (1):
Tg≥Ts− 0.3× D   (1).

7. The sheet processing apparatus according to claim 6 , wherein the plurality of fibers are bound by the heat treatment section.

8. The sheet processing apparatus according to claim 6 , further comprising:
a pressurizing unit that pressurizes the sheet at a position upstream to the heat treatment section in a transport direction of the sheet.

9. The sheet processing apparatus according to claim 8 , wherein
the pressurizing unit is a roller, and a material of a surface of the roller includes one or more of polysilicone, polyvinyl chloride, copolymer of acrylonitrile and 1,3-butadiene, and chloroprene rubber.

10. The sheet processing apparatus according to claim 6 , wherein a toner is fixed to the sheet by the heat treatment section.

11. The sheet processing apparatus according to claim 6 , wherein the heat treatment section is a heat roller.

Assignees

• Seiko Epson Corp

Inventors

• Ueno Yoshihiro
• Sago Takumi
• Kurata Hiroki
• Seki Shunichi

Classifications

• B41J2/335 Primary

  Structure of thermal heads · CPC title

• G03G7/0093

  Image-receiving members, based on materials other than paper or plastic sheets, e.g. textiles, metals · CPC title

• B41M5/0035 Primary

  Uncoated paper (paper making D21) · CPC title

• B41M5/502

  characterised by structural details, e.g. multilayer materials (supports, backcoats or intermediate layers for thermal dye transfer donor and receiver sheets B41M5/41, B41M5/42) · CPC title

• D04H1/488

  in combination with bonding agents · CPC title