EP0285156A2
Expired / Lapsed
EP
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A process for preparing a fiber reinforced resin matrix preform and the article therefrom
Assignee: EIDP Inc
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Filing: 1988-03-31
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Granted: —
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Expires: 2008-03-31
Abstract
Abstract Process for preparing preforms and composite articles from carbon fiber reinforced matrix resins braided to shape on a mandrel and then converting to final composite article by fully or partially curing in a mold followed by post curing if required.
Inventors
- 👤 Donald Charles Aldrich
- 👤 Robert Carl Buchanan
- 👤 John Franklin Sollinger
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 21:49
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/80; B29C53/84; B29C53/845; B29B; B29B11/00; B29B11/14; B29B11/16; B29C33/00; B29C33/44; B29C33/48; B29C33/485; B29C35/00; B29C35/02; B29C43/00; B29C43/02; B29C43/14; B29C43/32; B29C43/52; B29C53/56; B29C53/566; B29C69/00; B29C69/001; B29C69/002; B29C69/003; D; D04; D04C; D04C1/00; D04C1/06; D04C3/00; D04C3/48; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/10; B29K2105/101; B29K2105/24; B29K2105/243; B29L; B29L2031/00; B29L2031/04; B29L2031/045; B29L2031/24; D10; D10B; D10B2505/00; D10B2505/02; D10B2505/06; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933; Y10T428/2936; Y10T428/2973
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
78 words
A process for preparing a fiber reinforced resin matrix preform for a composite article comprising: dissolving the resin in a solvent solution and applying said solution to the fiber while braiding said fiber into a preform shape on a mandrel; heating the braided preform on the mandrel in an oven at a temperature sufficient to reduce the volatile content to from about 13% to about 28% by weight of the preform; and cooling the preform on the mandrel.
Claim 2
Dependent Claim
78 words
A process for preparing a fiber reinforced resin matrix preform for a composite article comprising: dissolving the resin in a solvent solution and applying said solution to the fiber while braiding said fiber into a preform shape on a mandrel; heating the braided preform on the mandrel in an oven at a temperature sufficient to reduce the volatile content to from about 13% to about 28% by weight of the preform; and cooling the preform on the mandrel.
Claim 3
Dependent Claim
183 words
The process of claim 1 including the further steps of forming a composite article from said preform comprising: removing said preform from the mandrel; then heating the preform in an oven at a temperature sufficient to provide a volatile content of from about 1% to about 5% by weight of the preform; consolidating said preform in a press into a composite article by applying a predetermined force thereto at an elevated temperature in a mold, according to the following steps: a) loading the preform into a press, b) ramping the temperature of the preform to said elevated temperature, c) closing the press until it just "kisses" the preform, d) opening and reclosing the press a plurality of times as temperature of the preform increases to said elevated temperature, e) applying said predetermined force for a dwell time when said temperature of the preform reaches said elevated temperature, f) opening and reclosing the press a plurality of times during the dwell time, g) cooling the preform to a predetermined temperature and, h) opening the press, removing the preform and allowing the preform to cool.
Claim 4
Dependent Claim
26 words
The process as defined in claim 2 wherein said preform is then post cured in an oven according to the time-temperature relationship shown in Fig. 7.
Claim 5
Dependent Claim
80 words
A self-supporting braided-to-shape fiber reinforced resin matrix preform for a composite article wherein: said preform has a shape that approximates the net shape of said composite article is braided with 32 carriers at a braiding angle of from about 54 to about 63 degrees with respect to the longitudinal axis of the article; a total volatile content of from about 1% to about 5% by weight of the preform and a fiber volume of from about 40% to about 50%.
Claim 6
Dependent Claim
80 words
A self-supporting braided-to-shape fiber reinforced resin matrix preform for a composite article wherein: said preform has a shape that approximates the net shape of said composite article is braided with 32 carriers at a braiding angle of from about 54 to about 63 degrees with respect to the longitudinal axis of the article; a total volatile content of from about 1% to about 5% by weight of the preform and a fiber volume of from about 40% to about 50%.
References Cited (Backward Citations)
No citation records indexed.
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