EP0148760A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Improvements in fibre reinforced plastics structures
Assignee: Wiggins Teape Group Ltd
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Filing: 1985-01-03
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Granted: —
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Expires: 2005-01-03
Abstract
Abstract An air permeable sheet-like structure comprising 20 to 60% by weight of reinforcing fibres having a high modulus of elasticity (as herein defined), and being between about 7 and about 50 millimetres long, and 40 to 80% by weight of wholly or substantially unconsolidated particulate plastics material, and in which the fibrous and plastics components are bonded into an air permeable structure.
Inventors
- 👤 Bronislaw Radvan
- 👤 Anthony John Willis
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 23:42
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/20; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/12; B29C70/16; B29C70/18; B29D; B29D7/00; D; D21; D21F; D21F11/00; D21F11/002; B29K; B29K2105/00; B29K2105/04; B29K2105/045; B29K2105/06; B29K2105/12; B29K2995/00; B29K2995/0037; B29K2995/0065; B29K2995/0068; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10S428/903; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/29; Y10T428/2982; Y10T442/00; Y10T442/20; Y10T442/2139; Y10T442/60; Y10T442/699
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
62 words
An air permeable sheet-like structure comprising 20% to 60% by weight of reinforcing fibres having a high modulus of elasticity (as herein defined), and being between about 7 and about 50 millimetres long, and 40% to 80% by weight of wholly or substantially unconsolidated particulate plastics material, and in which the fibrous and plastics components are bonded into an air permeable structure.
Claim 2
Dependent Claim
62 words
An air permeable sheet-like structure comprising 20% to 60% by weight of reinforcing fibres having a high modulus of elasticity (as herein defined), and being between about 7 and about 50 millimetres long, and 40% to 80% by weight of wholly or substantially unconsolidated particulate plastics material, and in which the fibrous and plastics components are bonded into an air permeable structure.
Claim 3
Dependent Claim
24 words
An air permeable sheet like structure as claimed in claim 1 in which the fibres are in the form of single discrete fibres. ;
Claim 4
Dependent Claim
25 words
An air permeable sheet like structure as claimed in claim 1 or claim 2 in which the particulate plastics material includes short plastics material fibres.
Claim 5
Dependent Claim
27 words
An air permeable sheet like structure as claimed in claims 1 to 3 in which the particulate plastics material components are bonded together to provide the bonding.
Claim 6
Dependent Claim
24 words
An air permeable sheet like structure as claimed in claims 1 to 3 in which a binder is added during manufacture to provide bonding.
Claim 7
Dependent Claim
24 words
An air permeable sheet like structure as claimed in claim 5 in which the binder is polyvinyl alcohol, polyvinyl acetate, carboxymethyl cellulose or starch.
Claim 8
Dependent Claim
28 words
An air permeable sheet like structure as claimed in any one of the preceding claims in which the diameter of the glass fibres are 13 microns or less.
Claim 9
Dependent Claim
33 words
An air permeable sheet like structure as claimed in any one of the preceding claims in which the plastics material is a thermoplastic, or a thermosetting plastic or a mixture of the two.
Claim 10
Dependent Claim
31 words
An air permeable sheet like structure as claimed in claim 8 in which the thermoplastic material ia polyethylene, polypropylene, polystyrene, acrylonitrylstyrene butadiene, polyethylene terephthalate, or polyvinyl chloride, both plasticised and unplasticised.
Claim 11
Dependent Claim
24 words
An air permeable sheet like structure as claimed in any one of the preceding claims in which the plastics material is in powder form.
Claim 12
Dependent Claim
28 words
An air permeable sheet like structure as claimed in claims 1 to 10 in which the particulate plastics material is not coarser than about 1.5 millimetres in size.
Claim 13
Dependent Claim
26 words
An air permeable sheet like structure as claimed in claim 11 in which the particulate plastics material particles are not more than 1 millimetre in size.
Claim 14
Dependent Claim
39 words
An air permeable sheet like structure as claimed in any one of the preceding claims in which the degree of bonding is controlled to cohere the components whilst still retaining sufficient flexibility to permit the structure to be reeled.
Claim 15
Dependent Claim
29 words
An air permeable sheet like structure as claimed in claims 1 to 12 in which the degree of bonding is controlled to produce a rigid but air permeable sheet.
Claim 16
Dependent Claim
26 words
An air permeable sheet like structure as claimed in any one of the preceding claims which has been coated or impregnated with a liquid thermosetting resin.
Claim 17
Dependent Claim
22 words
An air permeable sheet like structure as claimed in claim 15 in which the said thermosetting resin includes phenolic and polyester resins.
Claim 18
Dependent Claim
29 words
An air permeable sheet like structure as claimed in claim 16 in which the resins are phenol-formaldehyde resin, urea and melamine formaldehyde resins, epoxy resins, unsaturated polyesters and polyurethanes.
Claim 19
Dependent Claim
68 words
A process for the manufacture of a permeable sheet like fibrous structure which includes forming a web with 20% to 60% of single fibres having a high modulus of elsasticity (as herein defined) and between 7 and 50 millimetres long, and 4.0% to 60% by weight of a wholly or substantially unconsolidated particulate plastics material, and then treating the web to bond the fibres and plastics material together.
Claim 20
Dependent Claim
68 words
A process for the manufacture of a permeable sheet like fibrous structure which includes forming a web with 20% to 60% of single fibres having a high modulus of elsasticity (as herein defined) and between 7 and 50 millimetres long, and 4.0% to 60% by weight of a wholly or substantially unconsolidated particulate plastics material, and then treating the web to bond the fibres and plastics material together.
Claim 21
Dependent Claim
19 words
A process as claimed in claim 18 in which the fibres are in the form of single discrete fibres.
Claim 22
Dependent Claim
21 words
A process as claimed in claim 18 or claim 19 in which the particulate plastics material includes short plastics material fibres.
Claim 23
Dependent Claim
24 words
A process as claimed in claims 18, 19 or 20 in which the particulate plastics material components are bonded together to provide the bonding.
Claim 24
Dependent Claim
17 words
A process as claimed in claims 18 to 21 which includes adding a binder to assist bonding.
Claim 25
Dependent Claim
20 words
A process as claimed in claim 22 in which the binder is polyvinyl alcohol, polyvinyl acetate, carboxymethyl cellulose or starch.
Claim 26
Dependent Claim
27 words
A process as claimed in any one of the preceding claims 18 to 23 in which the diameter of the glass fibres are 13 microns or less.
Claim 27
Dependent Claim
31 words
A process as claimed in any one of preceding claims 18 to 24 in which the plastics material is a thermoplastic, or a thermosetting plastic or a mixture of the two.
Claim 28
Dependent Claim
28 words
A process as claimed in claim 2 5 in which the thermoplastic material is polyethylene, polypropylene, polystyrene, acrylonitrylstyrene butadiene, polyethylene terephthalate, or polyvinvyl chloride, both plasticised and unplasticised.
Claim 29
Dependent Claim
22 words
A process as claimed in any one of preceding claims 18 to 26 in which the plastics material is in powder form.
Claim 30
Dependent Claim
37 words
A process as claimed in any one of preceding claims 18 to 27 in which the degree of bonding is controlled to cohere the components whilst still retaining sufficient flexibility to permit the structure to be reeled.
Claim 31
Dependent Claim
29 words
A process as claimed in any one of preceding claims 18 to 28 in which the degree of bonding is controlled to produce a rigid but air permeabls sheet.
Claim 32
Dependent Claim
24 words
A process as claimed in any one of preceding claims 18 to 29 which has been coated or impregnated with a liquid thermosetting resin.
Claim 33
Dependent Claim
19 words
31, A process as claimed in claim 30 in which the said thermosetting resin includes phenolic and polyester resins.
Claim 34
Dependent Claim
24 words
3%. A process as claimed in any one of preceding claims 18 to 31 which includes forming the web on a paper making machine.
Claim 35
Dependent Claim
46 words
A process as claimed in any one of preceding claims 18 to 31 in which the web is made using the dry laying technique and the binder is applied by means of a spray or by dipping and draining the web after it has been formed.
Claim 36
Dependent Claim
39 words
A process as claimed in any one of preceding claims 18 to 33 in which the plastics content of the fibrous structure is wholly of thermoplastics material which is subjected to heating and cooling under pressure to effect consolidation.
Claim 37
Dependent Claim
24 words
A process as claimed in any one of preceding claims 18 to 34 in which the sheet is subsequently moulded to a predetermined shape.
Claim 38
Dependent Claim
19 words
A sheet like fibrous structure substantially as described herein with reference to and as shown in the accompanying drawings.
Claim 39
Dependent Claim
19 words
A sheet like fibrous structure substantially as described herein with reference to and as shown in the accompanying drawings.
Claim 40
Dependent Claim
18 words
A sheet like fibrous structure made by the method set forth in examples 1 to 22 described herein.
Claim 41
Dependent Claim
18 words
A sheet like fibrous structure made by the method set forth in examples 1 to 22 described herein.
Claim 42
Dependent Claim
16 words
3 8 . A process for manufacturing a sheet like fibrous structure substantially as described herein.
Claim 43
Dependent Claim
16 words
3 8 . A process for manufacturing a sheet like fibrous structure substantially as described herein.
Claim 44
Dependent Claim
21 words
3 9 . A sheet like fibrous structure made by the process set forth in examples 1 to 22 described herein.
Claim 45
Dependent Claim
21 words
3 9 . A sheet like fibrous structure made by the process set forth in examples 1 to 22 described herein.
References Cited (Backward Citations)
No citation records indexed.
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