GB2310814A - Roofing felt - Google Patents

Roofing felt Download PDF

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Publication number
GB2310814A
GB2310814A GB9703245A GB9703245A GB2310814A GB 2310814 A GB2310814 A GB 2310814A GB 9703245 A GB9703245 A GB 9703245A GB 9703245 A GB9703245 A GB 9703245A GB 2310814 A GB2310814 A GB 2310814A
Authority
GB
United Kingdom
Prior art keywords
coated
bitumen
woven sheet
roofing
roofing felt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9703245A
Other versions
GB2310814B (en
GB9703245D0 (en
Inventor
Richard Garth Rendle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHESTERFELT Ltd
Original Assignee
CHESTERFELT Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GBGB9605028.1A external-priority patent/GB9605028D0/en
Application filed by CHESTERFELT Ltd filed Critical CHESTERFELT Ltd
Priority to GB9703245A priority Critical patent/GB2310814B/en
Publication of GB9703245D0 publication Critical patent/GB9703245D0/en
Publication of GB2310814A publication Critical patent/GB2310814A/en
Application granted granted Critical
Publication of GB2310814B publication Critical patent/GB2310814B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D195/00—Coating compositions based on bituminous materials, e.g. asphalt, tar, pitch
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/10—Roof covering by making use of flexible material, e.g. supplied in roll form by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen

Description

Roofing Material This invention concerns a roofing material and, more particularly, a roofing "felt" of the kind (hereinafter termed "of the kind referred to") adapted to be positioned beneath tiles or slate to provide secondary protection against ingress of rain, wind and snow, particularly if the overlying tiles or slates become dislodged or broken.
A traditional ;;felt" of the kind referred to manufactured to British Standard 747, type IF, comprises a hessian backed paper felt which has been saturated with bitumen. Such is quite heavy, weighing some 1.5kg per square metre, and is also less resistant to mechanical damage than would be desirable.
It is an object of the present invention to provide a novel "felt" which overcomes, at least to some extent, the disadvantages associated with the traditional felts.
According to the present invention, there is provided a roofing ;'felt" of the kind referred to comprising a woven sheet of polypropylene material which is coated with bitumen under conditions such that, whilst the integrity of the woven sheet is maintained to give mechanical strength, it nonetheless melts into the bitumen to give an inseparable bond.
The woven sheet may be coated on one side only.
The woven sheet may be coated on both sides.
The woven sheet may be coated by passage over a roller whose lower part is immersed in a bath of molten bitumen.
The invention will be further apparent from the following description with reference to the single figure of the accompanying drawing, which shows, by way of example only, plant for the production of one form of roofing "felt" embodying same.
The "felt" comprises a sheet of woven polypropylene fabric (of basketweave for example) woven from multifilament strands of polypropylene and typically having 2 warps per cm and 5 weft picks per cm, which is coated on both faces with bitumen.
As shown in the drawing, the woven fabric 10 is drawn from a roll 11 thereof and guided through a nip formed between rollers 12 and 13. The lower part of the roller 13 is immersed in a bath 14 of molten bitumen.
The fabric 10 now coated with bitumen on one face is inverted by guide rollers 15 and 16 fed via tensioning rollers 17 to be guided through a further nip formed between rollers 18 and 19. The lower part of the roller 19 is immersed in a further bath 20 of molten bitumen.
Finely granulated material such as granulated limestone or talc is applied to the upper face of the fabric 10 (which is now coated with bitumen on both faces) by an applicator 21. The coated fabric is led around a first cooling roll 22 and finely granulated material is applied to its other face by a second applicator 23 before the fabric is passed around a second cooling roll 24.
Bitumen has a comparable melting point to that of polypropylene and the transit speed of the sheet is adjusted and controlled to ensure that whilst an adequate take-up of bitumen to form an effective seal over the surface ofthe composite is obtained the integrity of the woven sheet is retained to give mechanical strength but with sufficient melting of the polypropylene into the bitumen to ensure an inseparable bond.
Typically, a "felt" manufactured as described above will have a weight of as little as 0.5 kg per square metre whilst having mechanical strengths greatly in excess of those of traditional "felts".
In a modification the fabric 10 is coated on one face only and then has a weight of about 0.45 kg per square metre.
It will be appreciated that it is not intended to limit the invention to the above example only, many variations, such as might readily occur to one skilled in the art, being possible, without departing from the scope thereof as defined by the appended claims.

Claims (6)

1. A roofing "felt" of the kind referred to comprising a woven sheet of polypropylene material which is coated with bitumen under conditions such that, whilst the integrity of the woven sheet is maintained to give mechanical strength, it nonetheless melts into the bitumen to give an inseparable bond.
2. A roofing felt according to claim 1 wherein the woven sheet is coated on one side only.
3. A roofing felt according to claim 1 wherein the woven sheet is coated on both sides.
4. A roofing felt according to any preceding claim wherein the woven sheet is coated by passage over a roller whose lower part is immersed in a bath of molten bitumen.
5. A roofing felt according to any preceding claim wherein a fine granular material is applied to the bitumen coated face of the fabric.
6. A roofing felt according to any preceding claim having a weight in the range of from 0.45 - 0.5 kg per square metre.
GB9703245A 1996-03-09 1997-02-17 Roofing Material Expired - Fee Related GB2310814B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9703245A GB2310814B (en) 1996-03-09 1997-02-17 Roofing Material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9605028.1A GB9605028D0 (en) 1996-03-09 1996-03-09 Roofing material
GB9703245A GB2310814B (en) 1996-03-09 1997-02-17 Roofing Material

Publications (3)

Publication Number Publication Date
GB9703245D0 GB9703245D0 (en) 1997-04-09
GB2310814A true GB2310814A (en) 1997-09-10
GB2310814B GB2310814B (en) 1999-09-15

Family

ID=26308902

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9703245A Expired - Fee Related GB2310814B (en) 1996-03-09 1997-02-17 Roofing Material

Country Status (1)

Country Link
GB (1) GB2310814B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102199398A (en) * 2011-03-30 2011-09-28 中交第一公路勘察设计研究院有限公司 Environment-friendly road surface ice and snow melt coating material, preparation method thereof and using method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2064369A (en) * 1979-10-26 1981-06-17 Marley Tile Co Ltd Water-proofing materials and methods for the production thereof
GB2138357A (en) * 1983-04-15 1984-10-24 Coal Ind Improvements in adhesive sheets
EP0233488A1 (en) * 1986-01-29 1987-08-26 Hoechst Aktiengesellschaft Bituminous roofing and sealing membrane and its manufacturing method
EP0271727A1 (en) * 1986-12-17 1988-06-22 Paul Bauder GmbH & Co. Bituminous roofing sheet and its manufacturing method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1286141A (en) * 1969-01-13 1972-08-23 Anderson & Son Ltd D Coated or impregnated woven material
DE8705654U1 (en) * 1987-04-16 1988-08-11 Dr. Kohl Gmbh & Cie, Dachbelag- Und Bautenschutzmittel-Fabrik, 4270 Dorsten, De
GB2215270A (en) * 1988-02-22 1989-09-20 Tarmac Ind Products Limited Reinforced bitumen felts

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2064369A (en) * 1979-10-26 1981-06-17 Marley Tile Co Ltd Water-proofing materials and methods for the production thereof
GB2138357A (en) * 1983-04-15 1984-10-24 Coal Ind Improvements in adhesive sheets
EP0233488A1 (en) * 1986-01-29 1987-08-26 Hoechst Aktiengesellschaft Bituminous roofing and sealing membrane and its manufacturing method
EP0271727A1 (en) * 1986-12-17 1988-06-22 Paul Bauder GmbH & Co. Bituminous roofing sheet and its manufacturing method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102199398A (en) * 2011-03-30 2011-09-28 中交第一公路勘察设计研究院有限公司 Environment-friendly road surface ice and snow melt coating material, preparation method thereof and using method thereof
CN102199398B (en) * 2011-03-30 2012-08-22 西安中交万里新材料有限公司 Environment-friendly road surface ice and snow melt coating material, preparation method thereof and using method thereof

Also Published As

Publication number Publication date
GB2310814B (en) 1999-09-15
GB9703245D0 (en) 1997-04-09

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20050217