Composition for paper feed roll manufacture, paper feed roll and method of manufacture thereof

A manufacturing method and technology of paper feed rollers, applied in roads, instruments, traffic signals, etc., can solve problems such as mutual adhesion, and achieve the effects of excellent productivity, high compatibility, and excellent stability
CN1876715BInactive Publication Date: 2011-01-26NIPPON POLYURETHANE IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NIPPON POLYURETHANE IND CO LTD
Publication Date
2011-01-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a thermosetting urethane elastomer composition which is excellent in the liquid stability of its hardener and is capable of manufacturing a paper feeding roll excellent in the mechanical properties and surface characteristics. The composition consists of (A) the chief agent containing an NCO group-terminated urethane prepolymer obtained by the reaction of an MDI (diphenylmethane diisocyanate)-based isocyanate and PTMG (polyoxytetramethylene glycol), having an NCO content of 5-15% and a viscosity at 75[deg.]C of 1,000 mm<SP>2< / SP> / s or less and of (B) a hardener containing (B1) a long chain diol comprising PTMG, (B2) a short chain diol containing 2-methyl-1,3-propanediol in a proportion of more than 50% by mass, (B3) a short-chain triol comprising the essential component of TMP (trimethylolpropane), (B4) a catalyst comprising DMI (1,2-dimethylimidazole) and (B5) a temperature-sensitive catalyst comprising a bicyclic tertiary diamine (salt), with a ratio of [(B1) / [(B2)+(B3)]] being 80 / 20-95 / 5 (by mass) and with a ratio of [(B2) / (B3)] being 55 / 45-95 / 5 (by mass).
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Description

technical field

[0001] The present invention relates to a composition for manufacturing a paper feed roller, a paper feed roller, and a manufacturing method thereof, and more particularly, to a thermosetting polyurethane elastomer composition for forming an elastic member of a paper feed roller, and a paper feed roller formed using the composition. Paper roll and manufacturing method thereof. Background technique

[0002] As the elastic member (coating layer of the metal core) of the paper feed roller, a polyurethane elastomer is used (see Patent Documents 1 to 3).

[0003] In the production method of the elastic member (polyurethane elastomer) of the paper feed roller, the prepolymer method is adopted from the viewpoint of avoiding the deterioration of the operating environment by using free monomers. In the prepolymer method, the main agent composed of NCO group-terminated polyurethane prepolymer is prepared by reacting isocyanate with long-chain polyols such as poly(tetr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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