Paper feed roller and method for producing paper feed roller

Abstract

The invention provides a paper feed roller having durability, elasticity, and flexibility like rubber and also having moldability like resin, having a superior abrasion resistance, and having a sufficient carrying force relative to, especially, a silica sheet. This paper feed roller 1 is formed by molding thermoplastic elastomer composition, in which crosslinkable rubber or thermoplastic elastomer is dispersed by dynamic crosslinking, in thermoplastic resin or the thermoplastic elastomer into a roller state. At least, the surface layer of the roller includes titanium oxide at the ratio of not less than 1.5% but not more than 50% in a volume percentage.

Description

technical field [0001] The present invention relates to a paper feeding roller and a method for manufacturing the paper feeding roller. Specifically, the present invention relates to a method that not only has good softness and formability, but also improves the conveying force of conveyed materials such as paper. In particular, it can Paper feed roller that effectively prevents non-feeding of silicon paper. Background technique [0002] Rubber rollers are used in paper feeding mechanisms of inkjet printers, laser printers, electrostatic copiers, plain paper facsimile machines, automatic teller machines (ATMs) and the like. Since such rubber rollers must pick up conveyed materials such as paper and film materials, separate them, and send them out, excellent flexibility and high wear resistance are required as their characteristics. [0003] Also, this paper feeding roller is required to pick up, separate and convey various printing media such as gene...

AI Technical Summary

Problems solved by technology

[0007] However, the paper feed roller disclosed in the patent publication No. Hei 11-236465, which was previously applied by the applicant, has a higher coefficient of friction for ordinary paper, but it outputs many sheets of silicon paper and the like that contain more silicon. For paper, there is a possibility that the paper will not be fed, and there is still room for improvement in terms of the conveying force of silicon paper, etc.

[0008] Also, conventionally, the vulcanized EPDM rubber rollers and vulcanized polyvinyl chloride rubber rollers used as the above-mentioned paper feed rollers have the problem of poor formability in addition to being prone to non-feeding of silicon paper as described above.

[0009] Specifically, the rubber roller disclosed in Japanese Unexamined Patent Publication No. Hei 2-70636 mentioned above uses only EPDM rubber. In addition to the low conveying force of the paper after the paper is just started, its formability and manufacturing cost are also high. question

[0010] Furthermore, since the rubber roller disclosed in JP-A-2001-38971 is formed of silicone rubber, in addition to the low conveyance force of paper after the initial paper feeding, the cost of the raw material itself is high, and there are also problems in formability.

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