US5908689A
Expired / Lapsed
US
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Glass fiber strand mats, thermosetting composites reinforced with the same and methods for making the same
Assignee: Nippon Electric Glass America Inc
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Filing: 1997-01-24
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Granted: 1999-06-01
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Expires: 2017-01-24
Abstract
Abstract The present invention provides a mat adapted to reinforce a thermosetting matrix material to form a composite, composites formed therefrom, and methods related thereto. The mat includes a primary, supporting layer having a plurality of randomly oriented essentially continuous glass fiber strands. The primary layer has about 1 to about 10 weight percent of the mat on a total solids basis. The mat also includes a secondary layer positioned upon and supported by a surface of the primary layer, the secondary layer including a plurality of glass fiber strands. The mean average length of the glass fiber strands of the secondary layer ranges from about 20 to about 125 millimeters. The strands of the primary layer are entangled with the strands of the secondary layer by needling the primary layer and the secondary layer together.
Inventors
- 👤 David E. Dana
- 👤 Edward A. Martine
- 👤 Steven J. Morris
- 👤 Thomas P. Unites
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:36
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/28; B32B5/26; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/081; B32B5/02; B32B5/06; D; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; D04H1/498; D04H3/00; D04H3/002; D04H3/004; D04H3/08; D04H3/10; D04H3/105; D04H5/00; D04H5/02; D04H5/12; B32B2255/00; B32B2255/02; B32B2255/26; B32B2262/00; B32B2262/10; B32B2262/101; B32B2305/00; B32B2305/08; B32B2305/22; B32B2305/28; B32B2471/00; B32B2471/04; Y; Y10; Y10T; Y10T442/00; Y10T442/60; Y10T442/603; Y10T442/604; Y10T442/659; Y10T442/666; Y10T442/667; Y10T442/67; Y10T442/682
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
203 words
A mat adapted to reinforce a thermosetting matrix material to form a reinforced composite, the mat comprising: (a) a primary, supporting layer comprising a plurality of randomly oriented essentially continuous glass fiber strands coated with a sizing composition on at least a portion of surfaces thereof, the sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material, the primary layer comprising about 1 to about 20 weight percent of the mat on a total solids basis; and (b) a secondary layer positioned upon and supported by a surface of the primary layer, the secondary layer comprising a plurality of glass fiber strands coated with a second sizing composition on at least a portion of surfaces thereof, the second sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material, the mean average length of the glass fiber strands of the secondary layer ranging from about 20 to about 125 millimeters, wherein the strands of the primary layer are entangled with the strands of the secondary layer by needling the primary layer and the secondary layer together and the mat has a surface weight ranging from about 300 to about 3060 grams per square meter.
Claim 2
Dependent Claim
203 words
A mat adapted to reinforce a thermosetting matrix material to form a reinforced composite, the mat comprising: (a) a primary, supporting layer comprising a plurality of randomly oriented essentially continuous glass fiber strands coated with a sizing composition on at least a portion of surfaces thereof, the sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material, the primary layer comprising about 1 to about 20 weight percent of the mat on a total solids basis; and (b) a secondary layer positioned upon and supported by a surface of the primary layer, the secondary layer comprising a plurality of glass fiber strands coated with a second sizing composition on at least a portion of surfaces thereof, the second sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material, the mean average length of the glass fiber strands of the secondary layer ranging from about 20 to about 125 millimeters, wherein the strands of the primary layer are entangled with the strands of the secondary layer by needling the primary layer and the secondary layer together and the mat has a surface weight ranging from about 300 to about 3060 grams per square meter.
Claim 3
Dependent Claim
33 words
The mat according to claim 1, wherein the glass fiber strands of the primary layer have on at least a portion of the surfaces thereof the essentially dried residue of the sizing composition.
Claim 4
Dependent Claim
20 words
The mat according to claim 2, wherein the sizing composition further comprises a glass fiber lubricant and a coupling agent.
Claim 5
Dependent Claim
34 words
The mat according to claim 2, wherein the glass fiber strands of the secondary layer have on at least a portion of the surfaces thereof the essentially dried residue of the second sizing composition.
Claim 6
Dependent Claim
18 words
The mat according to claim 4, wherein the second sizing composition is different from the first sizing composition.
Claim 7
Dependent Claim
26 words
The mat according to claim 1, wherein the primary layer comprises about 1 to about 5 weight percent of the mat on a total solids basis.
Claim 8
Dependent Claim
17 words
The mat according to claim 1, wherein the glass fiber strands of the secondary layer are chopped.
Claim 9
Dependent Claim
28 words
The mat according to claim 1, wherein the glass fiber strands of the secondary layer have a mean average length ranging from about 25 to about 100 millimeters.
Claim 10
Dependent Claim
21 words
The mat according to claim 1, wherein the second sizing composition further comprises a glass fiber lubricant and a coupling agent.
Claim 11
Dependent Claim
31 words
The mat according to claim 1, wherein the primary layer and secondary layer are needled together at a punch density ranging from about 12 to about 31 punches per square centimeter.
Claim 12
Dependent Claim
21 words
The mat according to claim 1, wherein the primary layer further comprises a plurality of randomly oriented essentially continuous polymeric fibers.
Claim 13
Dependent Claim
33 words
The mat according to claim 11, wherein the essentially continuous polymeric fibers of the primary layer comprise about 1 to about 50 weight percent of the primary layer on a total solids basis.
Claim 14
Dependent Claim
33 words
The mat according to claim 1, wherein the secondary layer further comprises a plurality of polymeric fibers, the polymeric fibers having a mean average length ranging from about 20 to about 125 millimeters.
Claim 15
Dependent Claim
31 words
The mat according to claim 13, wherein the polymeric fibers of the secondary layer comprise about 1 to about 10 weight percent of the secondary layer on a total solids basis.
Claim 16
Dependent Claim
202 words
A reinforced polymeric composite comprising: (a) a thermosetting matrix material; and (b) a reinforcing mat comprising: (1) a primary, supporting layer comprising a plurality of randomly oriented essentially continuous glass fiber strands coated with a sizing composition on at least a portion of surfaces thereof, the sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material, the primary layer comprising about 1 to about 20 weight percent of the mat on a total solids basis; and (2) a secondary layer positioned upon and supported by a surface of the primary layer, the secondary layer comprising a plurality of glass fiber strands coated with a second sizing composition on at least a portion of surfaces thereof, the second sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material, the mean average length of the glass fiber strands of the secondary layer ranging from about 20 to about 125 millimeters, wherein the strands of the primary layer are entangled with the strands of the secondary layer by needling the primary layer and the secondary layer together and the mat has a surface weight ranging from about 300 to about 3060 grams per square meter.
Claim 17
Dependent Claim
202 words
A reinforced polymeric composite comprising: (a) a thermosetting matrix material; and (b) a reinforcing mat comprising: (1) a primary, supporting layer comprising a plurality of randomly oriented essentially continuous glass fiber strands coated with a sizing composition on at least a portion of surfaces thereof, the sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material, the primary layer comprising about 1 to about 20 weight percent of the mat on a total solids basis; and (2) a secondary layer positioned upon and supported by a surface of the primary layer, the secondary layer comprising a plurality of glass fiber strands coated with a second sizing composition on at least a portion of surfaces thereof, the second sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material, the mean average length of the glass fiber strands of the secondary layer ranging from about 20 to about 125 millimeters, wherein the strands of the primary layer are entangled with the strands of the secondary layer by needling the primary layer and the secondary layer together and the mat has a surface weight ranging from about 300 to about 3060 grams per square meter.
Claim 18
Independent Claim
227 words
A method for making a mat adapted to reinforce a thermosetting matrix material to form a reinforced composite, the method comprising the steps of: (a) dispersing a plurality of essentially continuous glass fiber strands to form a primary, support layer, the glass fiber strands being coated with a sizing composition on at least a portion of surfaces thereof, the sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material, the primary layer comprising about 1 to about 20 weight percent of the mat on a total solids basis, such that the glass fiber strands of the primary layer are randomly oriented; and (b) dispersing a plurality of chopped glass fiber strands upon a surface of the primary layer, the mean average length of the chopped glass fiber strands ranging from about 20 to about 125 millimeters, the chopped glass fiber strands being coated with a second sizing composition on at least a portion of surfaces thereof, the second sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material; and (c) entangling the essentially continuous glass fiber strands of the primary layer with the chopped glass fiber strands of the secondary layer by needling the layers together to form a mat, the mat having a surface weight ranging from about 300 to about 3060 grams per square meter.
Claim 19
Independent Claim
227 words
A method for making a mat adapted to reinforce a thermosetting matrix material to form a reinforced composite, the method comprising the steps of: (a) dispersing a plurality of essentially continuous glass fiber strands to form a primary, support layer, the glass fiber strands being coated with a sizing composition on at least a portion of surfaces thereof, the sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material, the primary layer comprising about 1 to about 20 weight percent of the mat on a total solids basis, such that the glass fiber strands of the primary layer are randomly oriented; and (b) dispersing a plurality of chopped glass fiber strands upon a surface of the primary layer, the mean average length of the chopped glass fiber strands ranging from about 20 to about 125 millimeters, the chopped glass fiber strands being coated with a second sizing composition on at least a portion of surfaces thereof, the second sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material; and (c) entangling the essentially continuous glass fiber strands of the primary layer with the chopped glass fiber strands of the secondary layer by needling the layers together to form a mat, the mat having a surface weight ranging from about 300 to about 3060 grams per square meter.
Claim 20
Independent Claim
252 words
A method for reinforcing a thermosetting matrix material to form a reinforced composite, the method comprising the steps of: (a) dispersing a plurality of essentially continuous glass fiber strands to form a primary, support layer, such that the glass fiber strands of the primary layer are randomly oriented the glass fiber strands being coated with a sizing composition on at least a portion of surfaces thereof, the sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material, the primary layer comprising about 1 to about 20 weight percent of the mat on a total solids basis; and (b) dispersing a plurality of chopped glass fiber strands upon a surface of the primary layer, the mean average length of the chopped glass fiber strands ranging from about 20 to about 125 millimeters, the chopped glass fiber strands being coated with a second sizing composition on at least a portion of surfaces thereof, the second sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material; (c) entangling the essentially continuous glass fiber strands of the primary layer with the chopped glass fiber strands of the secondary layer by needling the layers together to form a mat, the mat having a surface weight ranging from about 300 to about 3060 grams per square meter; (d) coating and impregnating at least a portion of the mat with a thermosetting matrix material; and (e) at least partially curing the thermosetting matrix material to form a reinforced composite.
Claim 21
Independent Claim
252 words
A method for reinforcing a thermosetting matrix material to form a reinforced composite, the method comprising the steps of: (a) dispersing a plurality of essentially continuous glass fiber strands to form a primary, support layer, such that the glass fiber strands of the primary layer are randomly oriented the glass fiber strands being coated with a sizing composition on at least a portion of surfaces thereof, the sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material, the primary layer comprising about 1 to about 20 weight percent of the mat on a total solids basis; and (b) dispersing a plurality of chopped glass fiber strands upon a surface of the primary layer, the mean average length of the chopped glass fiber strands ranging from about 20 to about 125 millimeters, the chopped glass fiber strands being coated with a second sizing composition on at least a portion of surfaces thereof, the second sizing composition comprising a thermosetting film-forming material which is compatible with the thermosetting matrix material; (c) entangling the essentially continuous glass fiber strands of the primary layer with the chopped glass fiber strands of the secondary layer by needling the layers together to form a mat, the mat having a surface weight ranging from about 300 to about 3060 grams per square meter; (d) coating and impregnating at least a portion of the mat with a thermosetting matrix material; and (e) at least partially curing the thermosetting matrix material to form a reinforced composite.
References Cited (Backward Citations)
US2528091A
Cited
DE1571503A1
Cited
US3614936A
Cited
DE2057783A1
Cited
US3713962A
Cited
US3889035A
Cited
US3883333A
Cited
JPS51149974A
Cited
JPS55133952A
Cited
US4278720A
Cited
US4277531A
Cited
US4335176A
Cited
US4404717A
Cited
US4532169A
Cited
JPS6213906A
Cited
US4615717A
Cited
US4692375A
Cited
EP0220513A2
Cited
US4752513A
Cited
US4927869A
Cited
US4955999A
Cited
US5129131A
Cited
JPH06248550A
Cited
JPH0775846A
Cited
EP0646454A1
Cited
US5580646A
Cited
WO1995009133A1
Cited
US5441590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-05-31 | 2002-11-30 | 2003-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-05-31 | 2006-11-30 | 2007-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-05-31 | 2010-11-30 | 2011-06-01 | $7700.00 | Window Closed / Lapsed |