GB1570466A - Wheel arch cover - Google Patents

Wheel arch cover Download PDF

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Publication number
GB1570466A
GB1570466A GB5255877A GB5255877A GB1570466A GB 1570466 A GB1570466 A GB 1570466A GB 5255877 A GB5255877 A GB 5255877A GB 5255877 A GB5255877 A GB 5255877A GB 1570466 A GB1570466 A GB 1570466A
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GB
United Kingdom
Prior art keywords
cover
wheel arch
sheet
polyethylene foam
effected
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.)
Expired
Application number
GB5255877A
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.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
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 Dynamit Nobel AG filed Critical Dynamit Nobel AG
Publication of GB1570466A publication Critical patent/GB1570466A/en
Expired legal-status Critical Current

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Classifications

    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/002—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/14—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/01—Liners for load platforms or load compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/16—Mud-guards or wings; Wheel cover panels
    • B62D25/161—Mud-guards made of non-conventional material, e.g. rubber, plastics
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B29K2105/046—Condition, form or state of moulded material or of the material to be shaped cellular or porous with closed cells
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised

Description

(54) WHEEL ARCH COVER (71) We, DYNAMIT NOBEL AKTENGESELLSCHAFT, a German Company, of 521 Troisdorf, Near Cologne, Germany, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to a wheel arch cover for fitting over a wheel arch in the interior of a motor vehicle.
Covers for the wheel arches of motor vehicles are frequently required and are used primarily for concealing the often unsightly wheel arches from view, i.e. for stylistic reasons. At the present time various materials are used for this purpose. In the main the known materials are textiles such as needle felt and shaped web products made of plastics such as polystyrene, PVC, ABS, polypropylene and composite materials made of these plastics.
Particularly in the case of hard or compact materials, it is necessary for the materials to be subsequently lined or foamed with plastic or fleeces in order to prevent them from creating noise during travel. This requirement in particular makes the covers expensive, so that the motor vehicle industry normally uses these covers only for the more luxurious types of motor vehicles. Subsequent lining with needle felt is not generally necessary but this material is very expensive which prevents its general use for all types of motor vehicles.
The specification of our copending Application No. 4045/76 (Serial No.
1,523,211) to which this is an addition, describes and claims a mat which is shaped to fit fully the luggage space floor of a means of transport, the mat being formed of closed cell cross-linked polyethylene foam plastics material, and a process for the production thereof. It has now been found that closed cell cross-linked polyethylene foam is also suitable for use in the production of wheel arch covers.
According to one aspect of the present invention, there is provided a wheel arch cover for fitting over a wheel arch in the interior of a motor vehicle, the cover being made of closedcell, cross-linked polyethylene foam plastics material.
According to a second aspect of this invention, there is provided a process for the production of a wheel arch cover, which comprises preheating a partially cross-linked polyethylene foam sheet having a closed-cell structure, and thereafter imparting to the sheet the shape of a wheel arch cover in a shaping procedure including vacuum stretching of the sheet onto a positive mould or superatmospheric pressure stretching of the sheet in a closed negative mould or pressing of the sheet between a pair of mould parts.
The wheel arch cover of the invention can be given a visually attractive outer appearance.
Moreover, the material from which it is made allows a uniform colouration to be provided throughout the thickness thereof. It is economical to make, and normally has a sufficient wear resistance and noise inhibition.
The use of closed-cell cross-linked polyethylene foam plastics suceeds not only in satisfying the requirements with regard to appearance, wear resistance and noise, but at the same time enables there to be produced by moulding a low-priced wheel arch cover which can be fitted in lower-priced motor vehicles without unnecessarily increasing the overall price.
Moreover, the wheel arch cover according to the invention has the advantage that it fits snugly against the wheel arch of the motor vehicle and therefore requires little space.
Chemically cross-linked polyethylene foam for use in the production of a wheel arch cover according to the invention can be produced from, for example, a mixture of polyethylene, a peroxide and a blowing agent (in particular azodicarbonamide), the mixture being moulded to form a continuous web with the aid of a broad slot appliance. This web can then be shaped by a number of methods which take advantage of the fact that the polyethylene foam material can be shaped in the elastic or plastic state under a vacuum or with a superatmospheric pressure or by pressing after preheating of the foam sheets to place it in the elastic or plastic state. The preheating is generally to be effected to a temperature of from 120 to 1600C and may be achieved in a radiation field or in a circulating air oven. One preferred procedure of vacuum stretching of the sheet after preheating has been effected at a temperature of from 130 to 1600C; the vacuum stretching itself is preferably effected at a temperature of from 30 to 500 C. Another preferred procedure involves superatmospheric pressure stretching of the foam sheet after preheating thereof has been effected to a temperature of from 120 to 1500C; the super- atmospheric air pressure then employed is preferably from 1 to 2 atmospheres.
The preheating is effected in a so-called foam oven to temperatures at which crosslinking takes place as a result of radical decomposition of the peroxide. In a second reaction stage, the blowing agent decomposes and expansion begins. A chemically crosslinked polyethylene foam produced in this way has a medium fine, uniform, closed-cell structure. It has a stability of shape upon heating of from 80 to 1000C depending upon its density, is resistant to aging, has a low moisture intake, acts as a shock absorber, is insoluble in oil, and is odourless. It has a very good mouldability when heated, and it is for this reason that vacuum processes, excess pressure processes and pressing processes can be employed to mould it. In addition, crosslinked polyethylene foam can be easily lined and embossed with textiles, plastic films and metal films by heating to the plastic state.
Cross-linked polyethylene foam has a rate of combustion of less than 100 mmlminute, and may be made self-extinguishing by means of suitable additions. The above-mentioned properties of cross-linked polyethylene foam taken as a whole complement each other optimally in its application for a wheel arch cover.
In a development of the invention, there is used a composite made of layers, joined together on at least two faces, of foam plastics of different densities, wherein the foam plastic with the higher density is preferably used for visible side of the wheel arch cover. A foam composite of this type has the advantage that various features of the wheel arch cover can be optimally solved while at the same economy is considered. Foam plastics with low densities are lower priced than foam plastics with higher densities because of the lower material content of the former. Foam plastics with higher densities have not only a higher energy absorption but also a higher resistance to abrasion. According to a preferred embodiment of the wheel arch cover according to the invention, the visible side of the wheel arch cover is made of chemically cross-linked polyethylene foam having a density of 150 to 250 kglm3 and the inner side is made of chemically cross-linked polyethylene foam having a density of 20 to 70 kg/m3. Preferably, in general, the wheel arch cover foam material has a mean density of from 30 to 200 kglm3 preferably from 100 kglm3.
It is possible to line the upper surface of the wheel arch cover, particularly the visible side, with a thermoplastic plastic film, for example polyethylene film or ABS film, or with a textile. Preferably, the wheel arch cover is produced from foam webs which are laminated and optionally lined, by means of moulding according to a vacuum process. The moulding of the single or multi-layer material is effected whilst the foam is in its elastic to plastic state, preferably by the use of a vacuum process; however the use of other press moulding processes is possible. The upper surfaces of the wheel arch cover, preferably the visible side, may be provided with an embossed texture or graining respectively. Moreover, it is possible to dye the foam plastics and composite materials as desired.
An example of a wheel arch cover according to the invention is shown in a perspective view in the accompanying drawing. In the drawing, the outline in dotted lines represents the vehicle body 1, while 2 represents the wheel arch cover produced by moulding from a single or multilayered foam plastic material.
The invention will now be illustrated by the following Examples.
EXAMPLE 1 A closed-celled partially crosslinked polyethylene foam web having a density of 100 kg/m3 and a thickness of 4 mm was produced from high pressure polyethylene containing 1% by weight of dicumyl peroxide as a crosslinking agent and 4.5% by weight of azodicarbonamide as a blowing agent. The web was heated on both sides in a radiation field to 1300 to l600C, and was then moulded to form a wheel arch cover by a vacuum process onto a negative mould tempered to 300 to 500 C. The mould tool had an embossed texture on the mould interior so that this texture was embossed onto the visible side of the cover.
EXAMPLE 2 A closed-celled, partially crosslinked polyethylene foam web as described in Example 1 was heat coated with a polyethylene film 150 tL thick and then heated in an air circulating oven to a material temperature of 1200 to 1 500C. The web was then moulded to form a wheel arch cover in a closed negative mould by an excess pressure process using an air pressure of 1 to 2 atmospheres above atmospheric pressure.
EXAMPLE 3 A closed-celled, partially crosslinked polyethylene foam web having a density of 200 kg/m3 and a thickness of 2 mm was produced from high pressure polyethylene containing 1% by weight of dicumyl peroxide as a crosslinking agent and 2.2% by weight of azodicarbonamide as a blowing agent. The web was heat coated with a polyethylene foam web having a density of 30 film3 and a thickness of 4 mm, produced from high pressure polyethylene containing 1% by weight of dicumyl peroxide as a crosslinking agent and 15% by weight of azodicarbonamide as a blowing agent. The composite was then heated on both sides in a radiation field to 1300C to 1500C and was moulded to form a wheel cover on to a negative mould tempered to 30 to 500C according to a vacuum process.
WHAT WE CLAIM IS: 1. A wheel arch cover for fitting over a wheel arch in the interior of a motor vehicle, the cover being made of closed-cell cross-linked polyethylene foam plastics material.
2. A cover as claimed in claim 1, the cover consisting of two or more layers of the foam plastic joined together, the layers having different densities.
3. A cover as claimed in claim 2, wherein the layer of the higher or highest density is used for the visible side of the cover.
4. A cover as claimed in claim 3, wherein the visible side of the cover is a layer of chemically cross-linked polyethylene foam having a density of 150 to 250 kg/m , and wherein the side of the cover intended to be adjacent to the wheel arch is a layer of chemically cross-linked polyethylene foam having a density of 20 to 70 kg/m3.
5. A cover as claimed in any of claims 1 to 4, wherein the visible side of the cover is coated with a thermoplastic plastic film or with a textile layer.
6. A cover as claimed in claim 5, wherein the thermoplastic plastic film is a polyethylene film or an ABS film.
7. A cover as claimed in any of claims 1 to 6, the visible side of the cover being embossed or grained.
8. A cover as claimed in any of claims 1 to 7, which has a uniform colouration throughout the thickness thereof.
9. A wheel arch cover substantially as hereinbefore described with reference to, and as shown in, the accompanying drawing.
10. A wheel arch cover substantially as described in any of the foregoing Examples.
11. A process for the production of a wheel arch cover, which comprises preheating a partially cross-linked polyethylene foam sheet having a closed-cell structure, and thereafter imparting to the sheet the shape of a wheel arch cover in a shaping procedure including vacuum stretching of the sheet onto a positive mould or superatmospheric pressure stretching of the sheet in a closed negative mould or pressing of the sheet between a pair of mould parts.
12. A process as claimed in claim 11, wherein said preheating is effected to a temperature of from 120 to 160 C.
13. A process as claimed in claim 11 or 12, wherein said preheating is effected in a radiation field or in a circulating air oven.
14. A process as claimed in claim 11 or 12, wherein the shaping procedure is effected by vacuum stretching of the sheet after said preheating has been effected at a temperature of from 130 to 1600C.
15. A process as claimed in claim 11, 12 or 14, wherein said vacuum stretching is effected at a temperature of from 30 to 50 C.
16. A process as claimed in claim 11 or 12, wherein the shaping procedure is effected by superatmospheric pressure stretching after said preheating has been effected to a temperature of from 120 to 150 C.
17. A process as claimed in claim 11, 12 or 16, wherein said superatmospheric pressure of from 1 to 2 atm.
18. A process as claimed in any one of claims 11 to 17, wherein the foam sheet is lined on one or both sides.
19. A process as claimed in claim 18, wherein the foam sheet is lined with polyolefine film or ABS film.
20. A process as claimed in any one of claims 11 to 19, wherein the polyethylene foam plastics material has a mean weight per unit volume of from 30 to 200 kg/m 21. A process as claimed in claim 20, wherein the polyethylene foam plastics material has a mean weight per unit volume of from 100 to 200 kg/m3.
22. A process as claimed in any one of claims 11 to 21, wherein the foam sheet comprises two layers of said polyethylene foam plastics material whose weights per unit volume are from 150 to 250 kg/m3 and from 20 to 70 kg/m3 respectively, the layer of the latter weight per unit volume being intended to lie, in use, on the underside of the mat being produced against a wheel arch of a vehicle.
23. A process as claimed in any one of claims 11 to 22, wherein one or both surfaces of the foam sheet undergo(es) profiling by embossing while still thermoplastic.
24. A process for the production of a wheel arch cover, substantially as described in any one of the foregoing Examples.
25. A wheel arch cover, whenever produced
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (26)

  1. **WARNING** start of CLMS field may overlap end of DESC **.
    polyethylene foam web as described in Example 1 was heat coated with a polyethylene film 150 tL thick and then heated in an air circulating oven to a material temperature of
    1200 to 1 500C. The web was then moulded to form a wheel arch cover in a closed negative mould by an excess pressure process using an air pressure of 1 to 2 atmospheres above atmospheric pressure.
    EXAMPLE 3 A closed-celled, partially crosslinked polyethylene foam web having a density of 200 kg/m3 and a thickness of 2 mm was produced from high pressure polyethylene containing 1% by weight of dicumyl peroxide as a crosslinking agent and 2.2% by weight of azodicarbonamide as a blowing agent. The web was heat coated with a polyethylene foam web having a density of 30 film3 and a thickness of 4 mm, produced from high pressure polyethylene containing 1% by weight of dicumyl peroxide as a crosslinking agent and 15% by weight of azodicarbonamide as a blowing agent. The composite was then heated on both sides in a radiation field to 1300C to 1500C and was moulded to form a wheel cover on to a negative mould tempered to 30 to 500C according to a vacuum process.
    WHAT WE CLAIM IS: 1. A wheel arch cover for fitting over a wheel arch in the interior of a motor vehicle, the cover being made of closed-cell cross-linked polyethylene foam plastics material.
  2. 2. A cover as claimed in claim 1, the cover consisting of two or more layers of the foam plastic joined together, the layers having different densities.
  3. 3. A cover as claimed in claim 2, wherein the layer of the higher or highest density is used for the visible side of the cover.
  4. 4. A cover as claimed in claim 3, wherein the visible side of the cover is a layer of chemically cross-linked polyethylene foam having a density of 150 to 250 kg/m , and wherein the side of the cover intended to be adjacent to the wheel arch is a layer of chemically cross-linked polyethylene foam having a density of 20 to 70 kg/m3.
  5. 5. A cover as claimed in any of claims 1 to 4, wherein the visible side of the cover is coated with a thermoplastic plastic film or with a textile layer.
  6. 6. A cover as claimed in claim 5, wherein the thermoplastic plastic film is a polyethylene film or an ABS film.
  7. 7. A cover as claimed in any of claims 1 to 6, the visible side of the cover being embossed or grained.
  8. 8. A cover as claimed in any of claims 1 to 7, which has a uniform colouration throughout the thickness thereof.
  9. 9. A wheel arch cover substantially as hereinbefore described with reference to, and as shown in, the accompanying drawing.
  10. 10. A wheel arch cover substantially as described in any of the foregoing Examples.
  11. 11. A process for the production of a wheel arch cover, which comprises preheating a partially cross-linked polyethylene foam sheet having a closed-cell structure, and thereafter imparting to the sheet the shape of a wheel arch cover in a shaping procedure including vacuum stretching of the sheet onto a positive mould or superatmospheric pressure stretching of the sheet in a closed negative mould or pressing of the sheet between a pair of mould parts.
  12. 12. A process as claimed in claim 11, wherein said preheating is effected to a temperature of from 120 to 160 C.
  13. 13. A process as claimed in claim 11 or 12, wherein said preheating is effected in a radiation field or in a circulating air oven.
  14. 14. A process as claimed in claim 11 or 12, wherein the shaping procedure is effected by vacuum stretching of the sheet after said preheating has been effected at a temperature of from 130 to 1600C.
  15. 15. A process as claimed in claim 11, 12 or 14, wherein said vacuum stretching is effected at a temperature of from 30 to 50 C.
  16. 16. A process as claimed in claim 11 or 12, wherein the shaping procedure is effected by superatmospheric pressure stretching after said preheating has been effected to a temperature of from 120 to 150 C.
  17. 17. A process as claimed in claim 11, 12 or 16, wherein said superatmospheric pressure of from 1 to 2 atm.
  18. 18. A process as claimed in any one of claims 11 to 17, wherein the foam sheet is lined on one or both sides.
  19. 19. A process as claimed in claim 18, wherein the foam sheet is lined with polyolefine film or ABS film.
  20. 20. A process as claimed in any one of claims 11 to 19, wherein the polyethylene foam plastics material has a mean weight per unit volume of from 30 to 200 kg/m
  21. 21. A process as claimed in claim 20, wherein the polyethylene foam plastics material has a mean weight per unit volume of from 100 to 200 kg/m3.
  22. 22. A process as claimed in any one of claims 11 to 21, wherein the foam sheet comprises two layers of said polyethylene foam plastics material whose weights per unit volume are from 150 to 250 kg/m3 and from 20 to 70 kg/m3 respectively, the layer of the latter weight per unit volume being intended to lie, in use, on the underside of the mat being produced against a wheel arch of a vehicle.
  23. 23. A process as claimed in any one of claims 11 to 22, wherein one or both surfaces of the foam sheet undergo(es) profiling by embossing while still thermoplastic.
  24. 24. A process for the production of a wheel arch cover, substantially as described in any one of the foregoing Examples.
  25. 25. A wheel arch cover, whenever produced
    by the process claimed in any one of claims
    11 to 24.
  26. 26. A motor vehicle having a wheel arch covered with a wheel arch cover as claimed any one of claims 1 to 10 and 25.
GB5255877A 1976-12-18 1977-12-16 Wheel arch cover Expired GB1570466A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762657494 DE2657494A1 (en) 1976-12-18 1976-12-18 MOLDED PARTS MADE FROM A DEFORMABLE THERMOPLASTIC CLOSED-CELL FOAM PLASTIC

Publications (1)

Publication Number Publication Date
GB1570466A true GB1570466A (en) 1980-07-02

Family

ID=5995891

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5255877A Expired GB1570466A (en) 1976-12-18 1977-12-16 Wheel arch cover

Country Status (10)

Country Link
JP (1) JPS53104933A (en)
BE (1) BE861921A (en)
BR (1) BR7708379A (en)
DE (1) DE2657494A1 (en)
ES (1) ES465179A1 (en)
FR (1) FR2374187A1 (en)
GB (1) GB1570466A (en)
IT (1) IT1115776B (en)
NL (1) NL7713983A (en)
SE (1) SE423505B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041353A1 (en) * 1980-06-02 1981-12-09 Talbot Motor Company Limited Wheel arch lining
GB2152942A (en) * 1983-11-30 1985-08-14 Stankiewicz Alois Dr Gmbh Interior noise reduction in motor vehicles
GB2216062A (en) * 1988-02-17 1989-10-04 H P Chemie Pelzer Res & Dev Moulding
AU722643B3 (en) * 2000-03-08 2000-08-10 Grant William Anstey A wheel arch cover
WO2002066312A1 (en) * 2001-02-16 2002-08-29 Stankiewicz Gmbh Light-weight wheel housing element
CN102501504A (en) * 2011-10-20 2012-06-20 四川大学 Low-density polymer-based sound insulation and noise reduction material and preparation method thereof
CN107880428A (en) * 2016-09-29 2018-04-06 四川大学 Low-density, flexible macromolecule base foaming sound insulating material and preparation method thereof

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3022461A1 (en) * 1980-06-14 1981-12-24 Fa. Carl Freudenberg, 6940 Weinheim Anti-drone sheet for automobile bodies - has propylene foam layer inorganic mesh reinforcement and permanently plastic adhesive facing
DE3233675C2 (en) * 1982-09-08 1994-09-15 Lignotock Gmbh Process for the production of molded parts laminated on the surface and having embossed patterns, preferably for the interior cladding of passenger cells for vehicles of all kinds
US4579764A (en) * 1984-06-27 1986-04-01 Collins & Aikman Corporation Molded carpet assembly with sound deadening foam backing
US4529639A (en) * 1984-06-27 1985-07-16 Collins & Aikman Corporation Molded foam-backed carpet assembly and method of producing same
DE3539146A1 (en) * 1985-11-05 1987-05-14 Ford Werke Ag WHEEL HOUSING LINING FOR MOTOR VEHICLES
US4740342A (en) * 1986-08-15 1988-04-26 Personal Products Company Thermoforming flexible plastic foam shells
IT1227861B (en) * 1988-11-04 1991-05-10 Solvay PROCEDURE FOR THE REALIZATION, THROUGH THERMOFORMING, OF A CONFORMING INSULATING COMPOSED ARTICLE INCLUDING AT LEAST TWO POLYOLEFIN SHEETS AND AN INTERMEDIATE INSERT OF CELLULAR STRUCTURE
DE4035822C2 (en) * 1990-11-10 1996-03-28 Bayerische Motoren Werke Ag Manufacturing process for a multi-layer molded body for the interior of vehicles

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Publication number Priority date Publication date Assignee Title
US3086794A (en) * 1961-05-08 1963-04-23 Edward C Garrett Fender boots for automobiles
DE1555288A1 (en) * 1966-11-19 1970-10-15 Eicher Traktor Landmasch A component subject to static and / or dynamic stress, in particular fenders for tractors
DE1901828A1 (en) * 1969-01-15 1970-08-20 Pharmacoll Vertriebsgmbh Producing foamed composite bodies
DE1923161B2 (en) * 1969-05-07 1974-03-28 Dr. Alois Stankiewicz, Chemische Erzeugnisse, 3101 Adelheidsdorf Post Nienhagen Mat for lining automobile body walls and a method of manufacturing the mat
DE6946205U (en) * 1969-11-27 1970-03-12 Dunlopillo Gmbh CAR SKY
DE2259862A1 (en) * 1972-12-07 1974-06-12 Dynamit Nobel Ag Vehicle lining fabric - comprising laminate of polyethylene foam and stiffening layers
DE2426793B2 (en) * 1974-06-01 1978-11-16 Dynamit Nobel Ag, 5210 Troisdorf Covering with a sound-absorbing effect
DE7737162U1 (en) * 1977-12-06 1978-03-16 Reiss International Gmbh, 7992 Tettnang Plastic wheel arches, in particular for caravans

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041353A1 (en) * 1980-06-02 1981-12-09 Talbot Motor Company Limited Wheel arch lining
GB2152942A (en) * 1983-11-30 1985-08-14 Stankiewicz Alois Dr Gmbh Interior noise reduction in motor vehicles
GB2216062A (en) * 1988-02-17 1989-10-04 H P Chemie Pelzer Res & Dev Moulding
GB2216062B (en) * 1988-02-17 1992-03-04 H P Chemie Pelzer Res & Dev Moulding
AU722643B3 (en) * 2000-03-08 2000-08-10 Grant William Anstey A wheel arch cover
WO2002066312A1 (en) * 2001-02-16 2002-08-29 Stankiewicz Gmbh Light-weight wheel housing element
CN102501504A (en) * 2011-10-20 2012-06-20 四川大学 Low-density polymer-based sound insulation and noise reduction material and preparation method thereof
CN102501504B (en) * 2011-10-20 2014-04-16 四川大学 Low-density polymer-based sound insulation and noise reduction material and preparation method thereof
CN107880428A (en) * 2016-09-29 2018-04-06 四川大学 Low-density, flexible macromolecule base foaming sound insulating material and preparation method thereof
CN107880428B (en) * 2016-09-29 2020-04-14 四川大学 Low-density flexible polymer-based foamed sound insulation material and preparation method thereof

Also Published As

Publication number Publication date
SE7714265L (en) 1978-06-19
FR2374187A1 (en) 1978-07-13
ES465179A1 (en) 1979-01-01
FR2374187B1 (en) 1982-05-14
SE423505B (en) 1982-05-10
JPS53104933A (en) 1978-09-12
NL7713983A (en) 1978-06-20
DE2657494A1 (en) 1978-06-22
BR7708379A (en) 1978-07-25
BE861921A (en) 1978-06-16
IT1115776B (en) 1986-02-03

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PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19960201