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Thermoplastic elastomer composition, its preparation method and rubber roller formed from the said composition

A thermoplastic elastomer and composition technology, applied in the field of thermoplastic elastomer composition and rubber rollers

Inactive Publication Date: 2002-03-20
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent only discloses the method of putting rubber, polyolefin resin and a large amount of softener into a twin-screw extruder at the same time, and then performing dynamic heat treatment in the presence of a crosslinking agent to obtain a thermoplastic elastomer composition. Softeners or small additions of softeners without revealing and implying

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～ Embodiment 5

[0060] In Examples 1 to 4, the crosslinking agent (reactive phenolic resin), (A) rubber (EPDM) crosslinked by the crosslinking agent (EPDM) and (B) are mixed according to the ratio of 4≥B / A≥1 / 4 A thermoplastic elastomer that is not crosslinked by a crosslinking agent (Septon 2063). In Examples 5 and 6, a crosslinking agent (reactive phenolic resin), the above (A), and a thermoplastic elastomer (Septon 2063) that is not crosslinked by the crosslinking agent are mixed according to the ratio of 4≥B / A≥1 / 4 And thermoplastic resin (PP) mixture.

[0061] The acetone extraction component in embodiment 1~embodiment 5 is all more than 20% below 0%.

[0062] In addition, the amount of oil added in the comparative example was 23%, and the acetone-extracted component was more than 20%.

[0063] The above-mentioned rubber rollers of Examples 1 to 5 and Comparative Example were tested and evaluated for their paper-feeding performance for OHP and the presence or absence of roll marks.

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Abstract

The invention can prevent oil bleeding from a rubber roller and a void (white-off) in the printed surface when it is used as a paper feeding roller. The thermoplastic elastomer composition is obtained by compounding together a crosslinking agent, a rubber (A) crosslinkable by the crosslinking agent and a thermoplastic elastomer (B) uncrosslinkable by the crosslinking agent or a blend of the thermoplastic elastomer (B) uncrosslinkable by the crosslinking agent with a thermoplastic resin so that the ratio of (B) to (A) is 4>=B / A>=1 / 4 thereby dynamically crosslinking the rubber (A) by the crosslinking agent to be dispersed in the thermoplastic elastomer (B). The composition is designed so that it contains none or a little amount of a softening agent comprising oil to set the acetone extract thereof not lower than 0% but not higher than 20%. The rubber roller for feeding a paper is made of the elastomer composition.

Description

technical field [0001] The present invention relates to a thermoplastic elastomer composition, its preparation method and a rubber roller made of the thermoplastic elastomer. In particular, it relates to a rubber roller that does not leave oil stains from the surface of the paper-feeding rubber roller during printing and that prevents discoloration of the printed surface. Background technique [0002] Rubber rollers are generally used in paper feeding devices for inkjet printers, laser printers, electrostatic copiers, plain paper facsimile machines, automatic teller machines (ATMs), and the like. Since the rubber roller must be loaded with and separated from the fed paper and film while feeding the paper and film, it is required to have good flexibility and high wear resistance. [0003] In addition, when printing photos and other products that require high image quality, if the printing paper is a paper with a small surface roughness and color, the part that is in contact ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65H5/06C08J3/20C08J3/24C08K5/00C08L21/00C08L23/16C08L101/00
Inventor 奥山英之
Owner SUMITOMO RUBBER IND LTD