Browse Prior Art Database

Elastomeric Rubber Compound

IP.com Disclosure Number: IPCOM000044702D
Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-06
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Cochran, DE: AUTHOR [+4]

Abstract

The following silicone rubber compound has been developed to mold paper handling products. Material Trade Name Supplier Amount Silicone Rubber Silastic GP437 Dow Corning 100 Natural Silicon Minusil 5m Pennsylvania 70 Dioxide Glass Sand Dicumyl Peroxide Varox R. T. Vanderbilt 1

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Elastomeric Rubber Compound

The following silicone rubber compound has been developed to mold paper handling products. Material Trade Name Supplier Amount Silicone Rubber Silastic GP437 Dow Corning 100 Natural Silicon Minusil 5m Pennsylvania 70 Dioxide Glass Sand Dicumyl Peroxide Varox R. T. Vanderbilt 1

The materials are mixed on a two-roll mill typical of those found in the rubber industry. The compound is cured ten minutes at 171OEC in a transfer press followed by post-curing for four hours at 200OEC in a forced air oven. The compound has a shore hardness of 50 measured according to ASTM D2240-68. The ultimate tensile strength is approximately 750 p.s.i. according to ASTM D412-68. This compound is particularly well suited for paper handling devices for the following reasons.

1. The rubber is stiff enough to prevent the devices from collapsing when vacuum is applied or turning inside out during operation.

2. The material has sufficient friction and is soft enough to form a leak-free seal against paper.

Disclosed anonymously

1