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Stabilizing Aromatic Polyamide Fabrics

IP.com Disclosure Number: IPCOM000088623D
Original Publication Date: 1977-Jul-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Chellis, LN: AUTHOR

Abstract

Untreated aromatic polyamide mats or fabrics such as KEVLAR* used in the production of printed-circuit boards and the like are pretreated with a water-soluble resin to reduce water absorption in the final product.

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Stabilizing Aromatic Polyamide Fabrics

Untreated aromatic polyamide mats or fabrics such as KEVLAR* used in the production of printed-circuit boards and the like are pretreated with a water- soluble resin to reduce water absorption in the final product.

In one method of pretreating the fabric, the mat is passed through a diluted solution of the water-soluble resin, and subject to a temperature cycle to remove the water and cure the resin. The pretreated fabric is then ready for further processing, e.g., final resin impregnation and lamination.

Examples of water-soluble pretreatment resins for this purpose are:

Phenol formaldehyde

Melamine formaldehyde

Urea formaldehyde

Hydantoin.

Examples of resins for the final impregnation are:

Epoxies

Polyimides

Triazine. * Trademark of E. I. du Pont de Nemours & Co.

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