PEELING MEMBER AND MANUFACTURING METHOD FOR THE SAME

• US 20190041777A1
• Filed: 09/15/2016
• Published: 02/07/2019
• Est. Priority Date: 09/15/2015
• Status: Active Grant

• Current Assignee: NTN Corporation
• Original Assignee: NTN Corporation
• Inventors: HIROSE, Kazuo
• Granted Patent: US 10,459,377 B2
• Time in Patent Office: Days
• CPC Class Codes: B05D 5/083 involving the use of fluoropolymers
• CPC Class Codes: G03G 15/2028 with means for handling the copy material in the fixing nip, e.g. introduction guides, stripping means
• CPC Class Codes: G03G 15/6532 Removing a copy sheet form a xerographic drum, band or plate removing sheets from printing cylinders B65H29/02

Abstract

To provide a peeling member formed by a metal plate or the like having a resin coating film thereon, the peeling member being capable of preventing adhesion of a paper right after fixing for a long period of time, and to provide a manufacturing method for the peeling member capable of forming a fine recessed portion on a surface of the resin coating film for preventing the adhesion of the paper. A peeling member 1 includes a peeling sheet 1a comprising a base material 2 having a plate shape, and a resin coating film 4 formed on at least a surface of the base material 2 at a paper passing side. The peeling member is formed to peel a paper from a fixing member of an electronic photographic device by arranging a distal end portion 1c to be contacted with or close to the fixing member. The resin coating film 4 includes a pattern portion 5 formed of grooves 5a, which are a plurality of recessed portions, on a surface of the resin coating film 4 at the paper passing side. A recess is not formed on the base material 2 as a base part of the recessed portion, and the pattern portion 5 is formed after applying and drying a resin coating material and before baking the resin coating material.

Claims

1. A peeling member comprising a peeling sheet formed by a base material having a plate shape, and a resin coating film formed on at least a surface of the base material at a paper passing side, the peeling member being configured to peel a paper from a fixing member of an electronic photographic device by arranging a distal end portion, which is an end portion at a side of one long side of the peeling sheet and at an upstream side in a paper passing direction, to be contacted with or close to the fixing member,

wherein the resin coating film comprises a plurality of recessed portions on a surface of the resin coating film at the paper passing side, and a recess is not formed on the base material as a base part of the recessed portion.

2. The peeling member according to claim 1, wherein the recessed portion is formed as linear grooves inclined in one direction or two directions against the paper passing direction and aligned along a longitudinal direction of the peeling sheet at the same intervals.

3. The peeling member according to claim 1, wherein:

the resin coating film comprises a matrix resin containing at least powder of fluororesin and powder of graphite; and

the resin coating film contains 25 to 70 parts by weight of the fluororesin and 1 to 20 parts by weight of the graphite against 100 parts by weight of the matrix resin.

4. The peeling member according to claim 3, wherein the matrix resin is formed of a polyamide imide resin.

5. The peeling member according to claim 3, wherein:

the fluororesin is formed of a polytetrafluoroethylene resin; and

the graphite contains 97.5% or more of fixed carbon.

6. A manufacturing method for the peeling member according to claim 1, comprising:

a coating film forming step of forming a resin coating film by drying a resin coating material after applying the resin coating material including a matrix resin on at least a surface of the base material of the peeling member at the paper passing side;

a coating film baking step of baking and hardening the resin coating film; and

a recessed portion forming step of forming a portion, which becomes a recessed portion when the coating film baking step is performed, on the surface of the resin coating film at the paper passing side, after the coating film forming step and before the coating film baking step.

7. The manufacturing method of the peeling member according to claim 6, wherein:

the recessed portion is formed as linear grooves inclined in one direction or two directions against the paper passing direction and aligned along a longitudinal direction of the peeling sheet at the same intervals; and

the linear groove is formed in the recessed portion forming step by pressing a rotation member including an outer periphery having a helical gear shape against the surface of the resin coating film while rotating.