GB2326663A - A seal having a low friction component - Google Patents

A seal having a low friction component Download PDF

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Publication number
GB2326663A
GB2326663A GB9713565A GB9713565A GB2326663A GB 2326663 A GB2326663 A GB 2326663A GB 9713565 A GB9713565 A GB 9713565A GB 9713565 A GB9713565 A GB 9713565A GB 2326663 A GB2326663 A GB 2326663A
Authority
GB
United Kingdom
Prior art keywords
fibres
tape
resinous
seal
plastics material
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
GB9713565A
Other versions
GB9713565D0 (en
GB2326663B (en
Inventor
Alan Charles Bickley
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.)
STANDARD PROD Ltd
Original Assignee
STANDARD PROD 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
Application filed by STANDARD PROD Ltd filed Critical STANDARD PROD Ltd
Priority to GB9713565A priority Critical patent/GB2326663B/en
Publication of GB9713565D0 publication Critical patent/GB9713565D0/en
Publication of GB2326663A publication Critical patent/GB2326663A/en
Application granted granted Critical
Publication of GB2326663B publication Critical patent/GB2326663B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J10/00—Sealing arrangements
    • B60J10/15—Sealing arrangements characterised by the material
    • B60J10/17—Sealing arrangements characterised by the material provided with a low-friction material on the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
    • B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Description

LOW FRICTION COMPONENT IN SEALS This invention relates to a low friction component in seals, particularly seals intended to be used in the automobile industry, especially seals which in use are to contact moving panes of glazing material.
Generally speaking, automobile seals such as waistseals and glass run channels, comprise an elastomeric extrusion, which often contains a metal reinforcing core, the extrusion being provided, on the surface intended to contact the pane of glass, with flock with a view to reducing the friction between the seal and the moving window glass.
A typical manufacturing process for such a glass run channel is: to extrude and then cure the profile (the elastomeric extrusion); to treat the surface of the extrudate so as to make it more receptive to adhesive (which can be achieved by a corona discharge or chlorination or other means); to apply flock adhesive to the area to be flocked; to apply flock to the area bearing the adhesive (which can often be achieved by gravity feed with an electrostatic field aligning and accelerating the flock); to cure the flock adhesive; to cool the flocked extrudate; and to remove any excess flock.
However, in practice, there are various problems associated with the product and its production, namely: loose flock can escape into the factory and is a potential health hazard as well as potentially contaminating other processes; the curing of the flock adhesive can be very time-consuming (particularly as temperatures are limited and the process can require two minutes to achieve a satisfactory cure - which implies a long production line is required); the process involves an additional step which needs to be monitored to locate potential failures, such as lack of adhesive or too much adhesive; and loose flock on a finished part is a potential hazard for operators fitting the part to a vehicle.
Instead of applying flock and securing it with an adhesive in the manner indicated above, it is possible to employ a strip formed of a plastics material (e.g.
polypropylene), with the strip carrying the flock.
Such a plastics strip has the flock applied to one face and, on its reverse face, a tie coat, intended to secure the plastics strip to the elastomer.
Alternatively, the plastics strip can be bonded to the elastomeric seal by melting the plastics material and applying pressure. However, disadvantages associated with this are the stiffness of the polypropylene strip and its cost.
According to one aspect of the present invention, there is provided a seal for use in an automobile in the region of a moving pane of glazing material, the seal comprising: an elastomeric extrudate which may include a metal reinforcing core; and a non-woven tape comprising a matrix of fibres and a resinous or thermoplastic plastics material which serves to bind these fibres, the tape being secured to the elastomeric extrudate.
Such non-woven tapes can contain a mixture of long and short fibres, and in such tapes the fibres form a matrix which are held together by the resinous or thermoplastic plastics material. Optionally there may be included in such fibres a particulate material. The selection of fibre type, fibre length or lengths, density, and type of resinous or thermoplastic plastics material can result in dramatically different properties in the non-woven tape.
In practice, non-woven tapes are normally produced in a wide roll (typically 2m wide) which can then be slit to widths of the desired dimension. As indicated above, the non-woven tape is bound to the elastomeric extrudate. If desired the same resinous or thermoplastic plastics material which binds the fibres together in the matrix in the tape can also be used to secure the tape to the elastomeric extrudate; alternatively, another layer of resinous or thermoplastic plastics material, which may be identical to or different from the first-mentioned resinous or thermoplastic plastics material, can be employed to secure the tape to the elastomeric extrudate.
Different techniques can be employed to produce the seal in accordance with the present invention.
Thus, according to another aspect of the present invention, there is provided a method of producing a seal in accordance with the first-mentioned aspect of the present invention, which method comprises: co-extruding the elastomeric extrudate and, adjacent thereto, a non-woven tape comprising fibres and a resinous or thermoplastic plastics material which binds the fibres in a matrix; curing the resulting profile; and cooling the resulting profile.
Instead, however, of applying the tape in the die, it could be applied downstream of the extrusion oven.
Accordingly, a further aspect of the present invention provides an alternative method of forming a seal in accordance with the first-mentioned aspect of the present invention, which method comprises: creating by extrusion the desired elastomeric extrudate; curing the resulting profile; applying to the cured profile a tape of non-woven material comprising fibres and a resinous or thermoplastic plastics material which binds the fibres in a matrix, to the cured profile; and cooling the resulting product.
When employing either method in accordance with the present invention, no loose fibres are generated, and the production line length is dramatically reduced, compared with the current known practice which involves applying flock fibres to a profile.
Depending on the resinous or thermoplastic plastics material to be used, it may be appropriate to include an additional step of pre-treating the surface of the elastomer, to assist in the bonding of the tape of non-woven material.
Examples of materials which can be used to form the fibres which form the matrix include nylon, polyesters, the material known by the trademark Kevlar, and a rock fibre such as granite.
For the resinous or thermoplastic plastics material which can be used to bond together the fibres which form the matrix within the non-woven tape, or which can be used to assist in bonding the tape to the elastomeric extrudate, examples include polyurethane, polypropylene and polyethylene materials.
If desired, particulate materials which can be incorporated into the matrix of the tape include PTFE and nylon particles.
For aesthetic purposes, the non-woven material tape can be coloured, by inclusion of a colouring agent.

Claims (11)

1. A seal for use in an automobile in the region of a moving pane of glazing material, the seal comprising: an elastomeric extrudate which may include a metal reinforcing core; and a non-woven tape comprising a matrix of fibres and a resinous or thermoplastic plastics material which serves to bind these fibres, the tape being secured to the elastomeric extrudate.
2. A seal according to claim 1 wherein the fibres comprise a mixture of long and short fibres.
3. A seal according to claim 1 or 2, wherein the same resinous or thermoplastic plastics material which binds the fibres together in the matrix in the tape also secures the tape to the elastomeric extrudate.
4. A seal according to claim 1 or 2, which includes an additional layer of resinous or thermoplastic plastics material, which may be identical to or different from the first-mentioned resinous or thermoplastic plastics material, secures the tape to the elastomeric extrudate.
5. A seal according to any preceding claim, wherein the fibres which form the matrix are formed from nylon, polyesters, the material known by the trademark Kevlar, and rock fibres.
6. A seal according to any preceding claim wherein the resinous or thermoplastic plastics material is a polyurethane, polypropylene or polyethylene.
7. A seal according to any preceding claim, wherein particulate materials are incorporated into the matrix of the tape.
8. A seal according to claim 7, wherein the particulate materials are formed of polytetrafluoroethylene or nylon particles.
9. A seal according to any preceding claim, wherein the tape is coloured by the inclusion of a colouring agent.
10. A method of producing a seal in accordance with any one of claims 1 to 9, which method comprises: co-extruding the elastomeric extrudate and, adjacent thereto, a non-woven tape comprising fibres and a resinous or thermoplastic plastics material which binds the fibres in a matrix; curing the resulting profile; and cooling the resulting profile.
11. A method of forming a seal in accordance with any one of claims 1 to 9, which method comprises: creating by extrusion the desired elastomeric extrudate; curing the resulting profile; applying to the cured profile a tape of non-woven material comprising fibres and a resinous or thermoplastic plastics material which binds the fibres in a matrix, to the cured profile; and cooling the resulting product.
GB9713565A 1997-06-26 1997-06-26 Low friction component in seals Expired - Fee Related GB2326663B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9713565A GB2326663B (en) 1997-06-26 1997-06-26 Low friction component in seals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9713565A GB2326663B (en) 1997-06-26 1997-06-26 Low friction component in seals

Publications (3)

Publication Number Publication Date
GB9713565D0 GB9713565D0 (en) 1997-09-03
GB2326663A true GB2326663A (en) 1998-12-30
GB2326663B GB2326663B (en) 2001-07-11

Family

ID=10814988

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9713565A Expired - Fee Related GB2326663B (en) 1997-06-26 1997-06-26 Low friction component in seals

Country Status (1)

Country Link
GB (1) GB2326663B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000040650A1 (en) * 1999-01-08 2000-07-13 Lear Automotive Dearborn, Inc. Fiber reinforced polyurethane
WO2006085206A1 (en) * 2005-02-11 2006-08-17 Gdx North America Inc. Procedure for flocking profiles and flocked profile produced thereby

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2074092A (en) * 1980-03-26 1981-10-28 Schiesser Ag Method and apparatus for equipping profiles formed of elastic masses with velour bands
EP0154121A1 (en) * 1984-02-18 1985-09-11 Continental Aktiengesellschaft Method of producing sealing strips and similar extruded profiles from rubber and/or rubber-like elastomers
GB2247711A (en) * 1990-08-13 1992-03-11 Gunze Kk Vehicle glass stabilizer guide
EP0503946A2 (en) * 1991-03-13 1992-09-16 Schlegel Corporation Glass guidance component
EP0626285A1 (en) * 1993-05-24 1994-11-30 Hutchinson Sealing joint for motor vehicle body

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2074092A (en) * 1980-03-26 1981-10-28 Schiesser Ag Method and apparatus for equipping profiles formed of elastic masses with velour bands
EP0154121A1 (en) * 1984-02-18 1985-09-11 Continental Aktiengesellschaft Method of producing sealing strips and similar extruded profiles from rubber and/or rubber-like elastomers
GB2247711A (en) * 1990-08-13 1992-03-11 Gunze Kk Vehicle glass stabilizer guide
EP0503946A2 (en) * 1991-03-13 1992-09-16 Schlegel Corporation Glass guidance component
EP0626285A1 (en) * 1993-05-24 1994-11-30 Hutchinson Sealing joint for motor vehicle body

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000040650A1 (en) * 1999-01-08 2000-07-13 Lear Automotive Dearborn, Inc. Fiber reinforced polyurethane
WO2006085206A1 (en) * 2005-02-11 2006-08-17 Gdx North America Inc. Procedure for flocking profiles and flocked profile produced thereby

Also Published As

Publication number Publication date
GB9713565D0 (en) 1997-09-03
GB2326663B (en) 2001-07-11

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20080626