WO1998039828A1 - Flexible protective sleeves - Google Patents

Flexible protective sleeves Download PDF

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Publication number
WO1998039828A1
WO1998039828A1 PCT/GB1998/000558 GB9800558W WO9839828A1 WO 1998039828 A1 WO1998039828 A1 WO 1998039828A1 GB 9800558 W GB9800558 W GB 9800558W WO 9839828 A1 WO9839828 A1 WO 9839828A1
Authority
WO
WIPO (PCT)
Prior art keywords
wall
sleeve
flock layer
sleeve according
external surface
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.)
Ceased
Application number
PCT/GB1998/000558
Other languages
French (fr)
Inventor
Carol Jayne Pindar
Joseph Paul Hess
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.)
Federal Mogul Technology Ltd
Original Assignee
Federal Mogul Technology Ltd
T&N Technology 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 Federal Mogul Technology Ltd, T&N Technology Ltd filed Critical Federal Mogul Technology Ltd
Priority to DE69806777T priority Critical patent/DE69806777T2/en
Priority to EP98907022A priority patent/EP1016177B1/en
Priority to JP53825598A priority patent/JP2001513980A/en
Priority to BR9808180-2A priority patent/BR9808180A/en
Publication of WO1998039828A1 publication Critical patent/WO1998039828A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/0207—Wire harnesses
    • B60R16/0215—Protecting, fastening and routing means therefor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0462—Tubings, i.e. having a closed section
    • H02G3/0481—Tubings, i.e. having a closed section with a circular cross-section
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/26—Installations of cables, lines, or separate protective tubing therefor directly on or in walls, ceilings, or floors
    • H02G3/263—Installation, e.g. suspension, of conduit channels or other supports

Definitions

  • This invention is concerned with flexible protective sleeves which are suitable for use for protecting wires or pipes, eg in the engine compartment of a vehicle.
  • Flexible protective sleeves are widely used to protect wires and pipes from damage.
  • Such sleeves normally have a wall made from plastics material, such as nylon, polypropylene or polyester.
  • said wall is made from plastics yarns or filaments, eg by braiding or weaving.
  • Other sleeves have walls formed from sheet plastics material in tubular form.
  • Some sleeves have a longitudinal slit in their wall to enable the sleeve to be installed over a pipe, a wire, or a bundle of wires which is already in situ. This invention is applicable to all these forms of sleeve.
  • the invention is, in particular, applicable to protective sleeves of the convoluted type.
  • This type has a wall from sheet plastics material in the form of a convoluted tube, ie the wall has annular crests separated by annular troughs.
  • the convolutions make the tube more conformable to bends in the wire or pipe.
  • the convolutions in such a sleeve can take various forms, eg a cross-section taken through the wall longitudinally of the tube may have the appearance of a sine wave or a square wave. Bends in the sleeve are accommodated by opening of the convolutions on the outer side of the bend and closing of the convolutions on the inner side of the bend.
  • a conventional flexible protective sleeve consists only of the afore-mentioned wall, ie the sleeve is entirely made of heat-resistant plastics material in braided, woven or tubular sheet form.
  • Such sleeves are used, eg in engine compartments, to protect, for example, wires leading to spark plugs, the distributor etc., or fuel pipes.
  • conventional flexible protective sleeves give rise to undesirable noise. Such noise may be caused by the sleeve contacting, eg vibrating against, adjacent components. Where the sleeve has a longitudinal slit, noise can also be caused by the edges of the slit contacting one another.
  • the invention provides a flexible protective sleeve comprising a wall made of plastics material, characterised in that the sleeve also comprises a flock layer adhered directly to the wall, the flock layer extending over at least part of the external surface of the wall.
  • the flock layer ie a layer formed from fine particles of fibre
  • the flock layer can be readily applied, eg by applying adhesive to the wall of the sleeve, electrostatically charging the particles, and exposing the sleeve to the particles while an electrical potential exists between the sleeve and the particles, techniques for flocking being well-known.
  • the adhesive By controlling to what parts of the sleeve the adhesive is applied, the flock layer can be applied to any desired part of the external surface or to the entire external surface.
  • the flock layer is light and, since it can be applied electrostatically, can conform itself to the surface.
  • part only of the external surface of the wall may have the flock layer applied thereto. This not only reduces the number of fibres used but can also improve noise reduction, since it is found that a complete covering of flock sometimes results in less noise reduction than an incomplete covering.
  • the flock layer may extend only over these parts.
  • the flock layer may be applied only to discrete areas distributed over the external surface of the wall, eg the areas may be stripes, or a regular or random pattern of dots.
  • the flock layer may also extend over at least one of the edges of the slit. This enables the flock layer to reduce noise caused by contact between the edges of the slit.
  • the flock layer may also extend over at least part of the internal surface of the wall. This can be achieved by opening the slit to apply the flock layer.
  • the flock layer may be formed from any suitable fibres which can withstand the environment in which the sleeve is to be used.
  • Nylon fibres eg nylon 6 or 66, and polyester fibres are suitable for many applications.
  • the fibres may be 0.5mm to 3mm in length, eg 0.7mm.
  • the fibres may be substantially all of the same length or may be of different lengths within the range stated.
  • Suitable fibre thicknesses are 1.7 to 22 dtex (the fibre thickness unit dtex has dimensions of g/10, 000m).
  • the adhesive used for adhering the flock layer may be applied from rollers, printed on, or sprayed on, eg with the use of a mask.
  • the adhesive is water- based, polyvinyl alcohols, acrylic and polyurethane latexes being suitable in some cases.
  • solvent-based alternatives include epoxies and polyurethanes.
  • the drawing is an end view of the illustrative sleeve.
  • the illustrative sleeve 10 comprises a wall 12 made of sheet plastics material, specifically nylon 6.
  • the wall 12 is in convoluted tubular sheet form.
  • the wall 12 has a thickness of 0.3 to 0.5mm.
  • the convolutions of the wall 12 are approximately in the form of a sine wave.
  • the wall 12 encloses a space 14 which has a circular transverse cross- section at all points along the sleeve 10 but varies in radius.
  • the radius of the external surface of the wall 12 is greatest at convex crests 12a thereof and smallest at concave troughs 12b.
  • the sleeve 10 is intended to protect a wire, a bundle of wires, or a pipe (not shown) which passes through the space 14.
  • a longitudinal slit 15 through the wall 12 extends along the length of the sleeve 10.
  • the sleeve 10 also comprises a flock layer 16 adhered directly to the wall 12.
  • the flock layer 16 comprises nylon fibres which are approximately 0.7mm in length and 1.7 dtex.
  • the flock layer 16 extends over parts of the external surface of the wall 12. Specifically, the layer 16 extends over convex portions of the external surface of the wall 12 in bands which extend circumferentially around the sleeve 10 (except where interrupted by the slit 15) .
  • the flock layer 16 is applied by applying adhesive to the parts of the wall 12 where the layer 16 is required, by spraying, and then passing the wall 12 through a dc electrostatic flocking plant. In the plant, electrostatically charged fibres spread themselves over the wall 12 but only adhere where there is adhesive.
  • the illustrative sleeve 10 was subjected to standard noise tests in comparison with a comparison sleeve having an identical wall 12 but omitting the flock layer 16.
  • a comparison sleeve having an identical wall 12 but omitting the flock layer 16.
  • an external rattling test in which the test specimen is vibrated against a steel plate, a bundle of wires gave a noise level of 90.6 decibels.
  • the comparison sleeve was installed over the bundle, the noise level was 63.5 decibels.
  • the comparison sleeve was replaced by the sleeve 10 the noise level was 46.2 decibels.
  • the wire bundle gave a noise level of 52.4 decibels; with the comparison sleeve on the bundle, the level was 52.3 decibels; and with the sleeve 10 on the bundle, the level was 45.7 decibels.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Pipe Accessories (AREA)
  • Laminated Bodies (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Gloves (AREA)
  • Flexible Shafts (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Details Of Indoor Wiring (AREA)
  • Building Environments (AREA)
  • Finishing Walls (AREA)

Abstract

A flexible protective sleeve (10) comprises a wall (12) made of plastics material. The sleeve also comprises a noise-reducing flock layer (16) adhered directly to the wall, the flock layer extending over at least parts (12a) of the external surface of the wall.

Description

FLEXIBLE PROTECTIVE SLEEVES
This invention is concerned with flexible protective sleeves which are suitable for use for protecting wires or pipes, eg in the engine compartment of a vehicle.
Flexible protective sleeves are widely used to protect wires and pipes from damage. Such sleeves normally have a wall made from plastics material, such as nylon, polypropylene or polyester. In some sleeves, said wall is made from plastics yarns or filaments, eg by braiding or weaving. Other sleeves have walls formed from sheet plastics material in tubular form. Some sleeves have a longitudinal slit in their wall to enable the sleeve to be installed over a pipe, a wire, or a bundle of wires which is already in situ. This invention is applicable to all these forms of sleeve.
The invention is, in particular, applicable to protective sleeves of the convoluted type. This type has a wall from sheet plastics material in the form of a convoluted tube, ie the wall has annular crests separated by annular troughs. The convolutions make the tube more conformable to bends in the wire or pipe. The convolutions in such a sleeve can take various forms, eg a cross-section taken through the wall longitudinally of the tube may have the appearance of a sine wave or a square wave. Bends in the sleeve are accommodated by opening of the convolutions on the outer side of the bend and closing of the convolutions on the inner side of the bend.
A conventional flexible protective sleeve consists only of the afore-mentioned wall, ie the sleeve is entirely made of heat-resistant plastics material in braided, woven or tubular sheet form. Such sleeves are used, eg in engine compartments, to protect, for example, wires leading to spark plugs, the distributor etc., or fuel pipes. In many cases, conventional flexible protective sleeves give rise to undesirable noise. Such noise may be caused by the sleeve contacting, eg vibrating against, adjacent components. Where the sleeve has a longitudinal slit, noise can also be caused by the edges of the slit contacting one another.
The problem of reducing noise from such sleeves has been considered in EP 0 556 140 B where the proposed solution is to wrap the sleeve with a strip of sound- insulating material, eg felt, which is adhered to the wall of the sleeve and folded over itself. Where the sleeve has a longitudinal slit, the strip's longitudinal edges are passed through the slit and reduce noise created within the sleeve by contact between the internal surface of the wall and the wire or pipe being protected. The process of applying the strip of material is, however, complex and the strip significantly increases the weight of the sleeve. Furthermore, it may be difficult to conform the strip to the outer surface of the wall of the sleeve, eg in the case of a convoluted sleeve of a square wave form.
It is an object of the present invention to provide an improved flexible protective sleeve having noise reducing capability but avoiding the use of an adhered strip.
The invention provides a flexible protective sleeve comprising a wall made of plastics material, characterised in that the sleeve also comprises a flock layer adhered directly to the wall, the flock layer extending over at least part of the external surface of the wall.
In a sleeve according to the invention, the flock layer, ie a layer formed from fine particles of fibre, can be readily applied, eg by applying adhesive to the wall of the sleeve, electrostatically charging the particles, and exposing the sleeve to the particles while an electrical potential exists between the sleeve and the particles, techniques for flocking being well-known. By controlling to what parts of the sleeve the adhesive is applied, the flock layer can be applied to any desired part of the external surface or to the entire external surface. The flock layer is light and, since it can be applied electrostatically, can conform itself to the surface.
If desired, part only of the external surface of the wall may have the flock layer applied thereto. This not only reduces the number of fibres used but can also improve noise reduction, since it is found that a complete covering of flock sometimes results in less noise reduction than an incomplete covering. For example, where the sleeve is convoluted, since the parts of the external surface of the greatest diameter are more likely to contact other components, the flock layer may extend only over these parts. Another possibility is that the flock layer may be applied only to discrete areas distributed over the external surface of the wall, eg the areas may be stripes, or a regular or random pattern of dots.
Where the wall has a longitudinal slit therein, the flock layer may also extend over at least one of the edges of the slit. This enables the flock layer to reduce noise caused by contact between the edges of the slit.
Where the wall has a longitudinal slit therein, the flock layer may also extend over at least part of the internal surface of the wall. This can be achieved by opening the slit to apply the flock layer.
The flock layer may be formed from any suitable fibres which can withstand the environment in which the sleeve is to be used. Nylon fibres, eg nylon 6 or 66, and polyester fibres are suitable for many applications. The fibres may be 0.5mm to 3mm in length, eg 0.7mm. The fibres may be substantially all of the same length or may be of different lengths within the range stated. Suitable fibre thicknesses are 1.7 to 22 dtex (the fibre thickness unit dtex has dimensions of g/10, 000m).
The adhesive used for adhering the flock layer may be applied from rollers, printed on, or sprayed on, eg with the use of a mask. Preferably, the adhesive is water- based, polyvinyl alcohols, acrylic and polyurethane latexes being suitable in some cases. However, solvent-based alternatives include epoxies and polyurethanes.
There now follows a detailed description, to be read with reference to the accompanying drawing, of a flexible protective sleeve which is illustrative of the invention.
The drawing is an end view of the illustrative sleeve.
The illustrative sleeve 10 comprises a wall 12 made of sheet plastics material, specifically nylon 6. The wall 12 is in convoluted tubular sheet form. The wall 12 has a thickness of 0.3 to 0.5mm. The convolutions of the wall 12 are approximately in the form of a sine wave. The wall 12 encloses a space 14 which has a circular transverse cross- section at all points along the sleeve 10 but varies in radius. The radius of the external surface of the wall 12 is greatest at convex crests 12a thereof and smallest at concave troughs 12b. The sleeve 10 is intended to protect a wire, a bundle of wires, or a pipe (not shown) which passes through the space 14. A longitudinal slit 15 through the wall 12 extends along the length of the sleeve 10.
The sleeve 10 also comprises a flock layer 16 adhered directly to the wall 12. The flock layer 16 comprises nylon fibres which are approximately 0.7mm in length and 1.7 dtex. The flock layer 16 extends over parts of the external surface of the wall 12. Specifically, the layer 16 extends over convex portions of the external surface of the wall 12 in bands which extend circumferentially around the sleeve 10 (except where interrupted by the slit 15) .
The flock layer 16 is applied by applying adhesive to the parts of the wall 12 where the layer 16 is required, by spraying, and then passing the wall 12 through a dc electrostatic flocking plant. In the plant, electrostatically charged fibres spread themselves over the wall 12 but only adhere where there is adhesive.
The illustrative sleeve 10 was subjected to standard noise tests in comparison with a comparison sleeve having an identical wall 12 but omitting the flock layer 16. In an external rattling test in which the test specimen is vibrated against a steel plate, a bundle of wires gave a noise level of 90.6 decibels. When the comparison sleeve was installed over the bundle, the noise level was 63.5 decibels. When the comparison sleeve was replaced by the sleeve 10 the noise level was 46.2 decibels. In a rubbing test in which the test specimen is rubbed along a steel plate, the wire bundle gave a noise level of 52.4 decibels; with the comparison sleeve on the bundle, the level was 52.3 decibels; and with the sleeve 10 on the bundle, the level was 45.7 decibels.

Claims

A flexible protective sleeve (10) comprising a wall (12) made of plastics material, characterised in that the sleeve also comprises a flock layer (16) adhered directly to the wall, the flock layer extending over at least part of the external surface of the wall.
A sleeve according to claim 1, characterised in that part (12a) only of the external surface of the wall (12) has the flock layer (16) applied thereto.
A sleeve according to claim 2, characterised in that the wall (12) is convoluted and the flock layer (16) extends only over parts (12a) of the external surface of the wall of greatest diameter.
A sleeve according to claim 2, characterised in that the flock layer (16) is applied to discrete areas distributed over the external surface of the wall (12).
A sleeve according to any one of claims 1 to 4, characterised in that the wall (12) has a longitudinal slit (15) therein and the flock layer (16) also extends over at least one of the edges of the slit.
A sleeve according to any one of claims 1 to 5, characterised in that the wall (12) has a longitudinal slit (15) therein and the flock layer (16) also extends over at least part of the internal surface of the wall.
A sleeve according to any one of claims 1 to 6, characterised in that the flock layer (16) is formed from nylon fibres. A sleeve according any one of claims 1 to 7, characterised in that the fibres forming the flock layer (16) are 0.5mm to 3mm in length.
A sleeve according to any one of claims 1 to 8, characterised in that the fibres forming the flock layer (16) have thicknesses between 1.7 and 22 dtex.
PCT/GB1998/000558 1997-03-05 1998-02-24 Flexible protective sleeves Ceased WO1998039828A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE69806777T DE69806777T2 (en) 1997-03-05 1998-02-24 BENDABLE PROTECTIVE COVER
EP98907022A EP1016177B1 (en) 1997-03-05 1998-02-24 Flexible protective sleeves
JP53825598A JP2001513980A (en) 1997-03-05 1998-02-24 Flexible protective sleeve
BR9808180-2A BR9808180A (en) 1997-03-05 1998-02-24 Protective glove flexibly

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9704530.6A GB9704530D0 (en) 1997-03-05 1997-03-05 Flexible protective sleeves
GB9704530.6 1997-03-05

Publications (1)

Publication Number Publication Date
WO1998039828A1 true WO1998039828A1 (en) 1998-09-11

Family

ID=10808722

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/000558 Ceased WO1998039828A1 (en) 1997-03-05 1998-02-24 Flexible protective sleeves

Country Status (10)

Country Link
EP (1) EP1016177B1 (en)
JP (1) JP2001513980A (en)
KR (1) KR20000075850A (en)
CN (1) CN1249860A (en)
AR (1) AR011179A1 (en)
BR (1) BR9808180A (en)
DE (1) DE69806777T2 (en)
ES (1) ES2176974T3 (en)
GB (1) GB9704530D0 (en)
WO (1) WO1998039828A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10862280B2 (en) 2008-06-23 2020-12-08 Wesco Distribution, Inc. Communications cable with fabric sleeve

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100800850B1 (en) * 2003-12-25 2008-02-04 가부시키가이샤 도요 퀄리티 원 Cover member and its manufacturing method
CN101394072B (en) * 2007-09-21 2012-05-23 卡特彼勒公司 Wire harness installation structure and method, driving chamber equipped with the wire harness
CN103603923B (en) * 2013-11-19 2016-01-27 青岛锦象链条制造有限公司 A kind of diagonal cut joint chain barrel
CN105720529B (en) * 2014-12-05 2018-02-09 宋继萍 Anechoic room pipeline sound insulating structure
DE102020119244A1 (en) 2020-07-21 2022-01-27 Buergofol GmbH Foil system for use in a pipe liner for pipe rehabilitation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3212386A1 (en) * 1981-06-22 1983-01-13 Veloutex N.V., Turnhout Heat- and sound-insulating material and process for its production
EP0220533A2 (en) * 1985-10-30 1987-05-06 Franz Josef Rath Container for foodstuffs and process for producing the same
EP0346762A2 (en) * 1988-06-14 1989-12-20 Toray Industries, Inc. Heat-resistant flock sheet
JPH0231701A (en) * 1988-07-22 1990-02-01 Achilles Corp Shoe and its manufacture
EP0556140A1 (en) * 1992-02-12 1993-08-18 Sofanou S.A. Sound-proofing tubular sheath for electric cable and method of manufacturing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3212386A1 (en) * 1981-06-22 1983-01-13 Veloutex N.V., Turnhout Heat- and sound-insulating material and process for its production
EP0220533A2 (en) * 1985-10-30 1987-05-06 Franz Josef Rath Container for foodstuffs and process for producing the same
EP0346762A2 (en) * 1988-06-14 1989-12-20 Toray Industries, Inc. Heat-resistant flock sheet
JPH0231701A (en) * 1988-07-22 1990-02-01 Achilles Corp Shoe and its manufacture
EP0556140A1 (en) * 1992-02-12 1993-08-18 Sofanou S.A. Sound-proofing tubular sheath for electric cable and method of manufacturing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 184 (C - 0709) 13 April 1990 (1990-04-13) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10862280B2 (en) 2008-06-23 2020-12-08 Wesco Distribution, Inc. Communications cable with fabric sleeve

Also Published As

Publication number Publication date
AR011179A1 (en) 2000-08-02
ES2176974T3 (en) 2002-12-01
EP1016177A1 (en) 2000-07-05
GB9704530D0 (en) 1997-04-23
DE69806777D1 (en) 2002-08-29
DE69806777T2 (en) 2003-03-27
BR9808180A (en) 2000-05-16
EP1016177B1 (en) 2002-07-24
JP2001513980A (en) 2001-09-04
KR20000075850A (en) 2000-12-26
CN1249860A (en) 2000-04-05

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