Process for producing preformable continuous strand mats using a

Details Process for producing preformable continuous strand mats using a Process for producing preformable continuous strand mats using a

1987-04-07

1990-02-06

Dawson, Robert A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

156166, 156181, 156296, 1563096, 264136, 65 44, 428290, 428406, B32B 502

Patent

active

048987700

ABSTRACT:
A process for forming a continuous strand preformable mat is disclosed which consists of applying a binder matrix material which includes a thermosetting polyester binder material and a thermoplastic polyester binder to the continuous strand mat. The mat is heated such that the thermosetting binder material cures and hardens while the thermoplastic binder material softens and flows around strand intersections. The mat is thereafter cooled in order to solidify the thermoplastic polyester material of the binder matrix for additional handling for packaging and for subsequent handling by the customer. The preforms are made by heating the mat to over 200.degree. F., placing in a cold mold, and then closing the mold to form and solidify the mat shape.

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patent: 4098943 (1978-07-01), Digginger
patent: 4615717 (1986-10-01), Neubauer et al.

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