Browse Prior Art Database

Non-Bleeding Nitrile Rubber

IP.com Disclosure Number: IPCOM000103387D
Original Publication Date: 1990-Nov-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 23K

Publishing Venue

IBM

Related People

Barton, WH: AUTHOR

Abstract

The disclosure concerns the formula for a nitrile rubber. The rubber is used in a developer roller in an electrophotographic printer.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Non-Bleeding Nitrile Rubber

      The disclosure concerns the formula for a nitrile rubber. The
rubber is used in a developer roller in an electrophotographic
printer.

      It is necessary for the application to use softeners to lower
the rubber hardness.  However, traditional oil-type softeners, such
as esters and phthalates, bleed to the roller surface and cause toner
powder to stick to the roller, which is undesirable.

      The bleeding can be avoided by using two non-migrating
softeners.  These are liquid nitrile rubber and vulcanized vegetable
oil.  For example, using 30 parts of liquid nitrile rubber and 10
parts of vulcanized vegetable oil (per 100 parts nitrile rubber gum,
by weight) a non-bleeding 35A-Shore-durometer rubber can be produced.

      Disclosed anonymously.