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Anomalous-noise-suppressed roller

A technology of foaming polyurethane and cross-linking agent, which is applied in the directions of pile separation, printing, transportation and packaging, etc. It can solve the problems of not all satisfying the countermeasures of screaming, durable compression permanent deformation, etc., and achieves the effect of excellent durability and thin thickness

Active Publication Date: 2007-10-24
SYNZTEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned squealing countermeasures for rolls are effective for thick rolls, but cannot fully satisfy squealing countermeasures, durability, and compression set for thin rolls.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A foam stabilizer and an anti-aging agent were added to caprolactone-based polyurethane prepolymer (RV2600: manufactured by Dainippon Ink Chemical Co., Ltd.) 100 parts by mass, and stirred for 5 minutes in mechanical foaming. Then, as curing agent, the mass ratio of chain extender 1,4-butanediol and crosslinking agent trimethylolpropane (TMP) is 90:10 mixture 7.3 mass parts and 0.05 mass parts of water are mixed, Stir in foaming for 1 minute, and cast it in a mold heated to 120°C to a foaming density of 0.4g / cm 3 (Casting mass / volume of casting mold), removed after 50 minutes to produce a roll. The obtained roll was ground and cut to obtain the roll foam body of Example 1 having an outer diameter of Φ23 mm x an inner diameter of Φ17 mm x a width of 24 mm. Among them, the compression set (CS) was 15%.

[0034] Among them, the compression set was measured in accordance with JIS K6262 at 70°C, 22 hours, and 25% compression conditions on a roll-shaped object of Φ37mm×Φ17m...

Embodiment 2

[0036] In addition to making the foam density 0.5g / cm 3 Except that, in the same manner as in Example 1, the roller foam of Example 2 was obtained. Among them, the compression set was 15%.

Embodiment 3

[0038] In addition to making the foam density 0.6g / cm 3 Except that, in the same manner as in Example 1, the roller foam of Example 3 was obtained. Among them, the compression set was 16%.

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Abstract

The present invention provides an anomalous-noise-suppressed roller having excellent durability and small thickness. The anomalous-noise-suppressed roller is formed of polyurethane foam, wherein the polyurethane foam is produced from a prepolymer derived from a caprolactone diol; a chain-extender formed of a 2-functional diol; and a cross-linking agent formed of a short-chain polyol having three or more functionalities; the cross-linking agent is employed in an amount of 10% by mass or more and less than 20% by mass, with respect to the total amount of the chain-extender and the cross-linking agent; the polyurethane foam exhibits a permanent compressive strain, as determined under 25% compression at 70 DEG C. for 22 hours, of 20% or less, and an Asker C hardness of 60 to 70 DEG ; and the roller has a thickness of 4 mm or less.

Description

technical field [0001] The present invention relates to anti-squealing rollers made of polyurethane foam, and in particular to paper feeding and conveying rollers and reverse rollers suitable for various paper feeding and conveying in various OA equipment such as copiers, facsimile machines, and various printers. Anti-squealing roller for the paper separation roller. Background technique [0002] Up to now, the feeding and conveying rollers of various OA equipment have been required to have high conveying force and excellent wear resistance. However, in recent years, it has been seen that the so-called buzzing phenomenon occurs due to the vibration generated by friction with paper during paper feeding. for the problem. [0003] In addition, for the separation roller used to prevent double feeding in the paper feeding part, foamed polyurethane is generally used in terms of wear resistance and original non-contamination. When turning, porphyrin and creaking noises (tweeting)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04B65H3/06B65H5/06
CPCB65H3/06B41J13/02B65H3/0638B65H3/5207B65H5/06B65H27/00B65H2601/521C08G18/10C08G18/4277C08G2101/0066C08G2350/00C08G2110/0066C08G18/3206
Inventor 坂谷弥香
Owner SYNZTEC