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Paper feed roller

A paper feed roller and plasticizer technology, applied in the field of paper feed rollers, can solve the problems of reduced friction coefficient of paper feed rollers, poor paper conveyance, etc., and achieve excellent wear resistance

Inactive Publication Date: 2011-03-30
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, due to the adhesion of paper dust, the friction coefficient of the paper feed roller may decrease, causing poor paper conveyance at a relatively initial stage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] 80 parts by mass of the pellets of the polyurethane thermoplastic elastomer prepared according to Synthesis Example 1, and 20 parts by mass of diisopropylene glycol dibenzoate (Benzoflex 988 (registered trademark) of Velsicol Chemical Co.) Heat in an oven at 80°C for 15 hours to impregnate the plasticizer into the pellets. The entire contents of the barrel were then supplied to a twin-screw extruder (screw diameter: 30 mm, L / D: 36D, number of revolutions: 10 to 300 rpm), milled and continuously extruded with a twin-screw extruder, followed by pelletizing again to make TPU particles. The extrusion conditions were set at a screw speed of 120 rpm and a resin temperature of 180°C. The mass ratio E / P of polyurethane thermoplastic elastomer and plasticizer is 80 / 20.

[0108] Then, the above-mentioned TPU pellets were supplied to a 50-ton injection molding machine (manufactured by Sumitomo Heavy Industries, Ltd.). Then, the pellets are ground with an injection molding machi...

Embodiment 2 and comparative example 1

[0111] Prepare TPU particles in a method similar to Example 1, except that the polyurethane thermoplastic elastomer particles prepared according to Synthesis Example 2 (Example 2) and Synthesis Example 4 (Comparative Example 1) are used respectively, and the amount of each particle and the amounts of diisopropylene glycol dibenzoate as an ether ester plasticizer were set to 90 parts by mass and 10 parts by mass, respectively. In each TPU, the mass ratio E / P of the polyurethane thermoplastic elastomer and the plasticizer was 90 / 10.

Embodiment 3 and 4

[0142] TPU particles were prepared in a manner similar to that of Example 1 to form the paper feed roller 1, except that a polyethylene glycol diester (Sanflex (registered trademark) equivalent to a monooxyalkylene or polyoxyalkylene glycol diester was used. EB 300, manufactured by Sanyo Chemical Industry Co., Ltd.) (Example 3) and bis(2-methoxyethyl)phthalate corresponding to phthalic acid having an alkylene oxide structure (DMEP, Example 4) as a plasticizer. In each TPU, the mass ratio E / P of the polyurethane thermoplastic elastomer and the plasticizer was 80 / 20.

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Abstract

The paper feed roller according to the present invention is made of (1) a thermoplastic elastomer composition containing an ester thermoplastic elastomer urethane (E) having microrubber hardness (type A) of not less than 80 and not more than 95 and at least one plasticizer (P) selected from a group consisting of an ether ester plasticizer and a phthalic ester plasticizer in a mass ratio E / P of 95 / 5 to 70 / 30, or (2) a thermoplastic elastomer composition containing an ether thermoplastic elastomer urethane (E) having microrubber hardness (type A) of not less than 80 and not more than 95 and at least one plasticizer (P) selected from a group consisting of an ether ester plasticizer, a phthalic ester plasticizer and a phosphoric acid plasticizer in a mass ratio E / P of 95 / 5 to 70 / 30.

Description

technical field [0001] The invention relates to a paper feeding roller applied to an electrostatic copier or a printer for feeding paper. Background technique [0002] The paper feed roller is installed in a paper feed mechanism provided in, for example, an xerographic copier, a laser beam printer, a plain paper facsimile machine, an inkjet printer, or an automatic teller machine (ATM). Feed rollers include: feed rollers, feed rollers, pressure rollers, or paper discharge rollers that are in rotational contact with paper (including plastic films, etc.: this also applies to the following descriptions) and are conveyed by friction Paper. [0003] In general, rubber rollers made of, for example, natural rubber, urethane rubber, ethylene-propylene-diene rubber (EPDM), polyvinylidene norbornene rubber, silicone rubber, chlorinated polyethylene rubber, etc. are used as paper feed rollers. [0004] In order to achieve excellent paper feeding by increasing the coefficient of frict...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65H5/06B65H29/20C08L75/06C08L75/08
CPCB65H2401/111B65H27/00B65H2404/11B65H2404/5322C08K5/521C08K5/10C08L75/08
Inventor 田村俊裕峰章弘西森浩一奥山英之
Owner SUMITOMO RUBBER IND LTD