GB2093767A - Producing a decorative section - Google Patents

Producing a decorative section Download PDF

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Publication number
GB2093767A
GB2093767A GB8136399A GB8136399A GB2093767A GB 2093767 A GB2093767 A GB 2093767A GB 8136399 A GB8136399 A GB 8136399A GB 8136399 A GB8136399 A GB 8136399A GB 2093767 A GB2093767 A GB 2093767A
Authority
GB
United Kingdom
Prior art keywords
decorative
carrier film
section
coating
film
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
GB8136399A
Other versions
GB2093767B (en
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.)
Rehau Plastiks GmbH
Original Assignee
Rehau Plastiks GmbH
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 Rehau Plastiks GmbH filed Critical Rehau Plastiks GmbH
Publication of GB2093767A publication Critical patent/GB2093767A/en
Application granted granted Critical
Publication of GB2093767B publication Critical patent/GB2093767B/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/10—Applying flat materials, e.g. leaflets, pieces of fabrics
    • B44C1/105—Applying flat materials, e.g. leaflets, pieces of fabrics comprising an adhesive layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2325/00—Polymers of vinyl-aromatic compounds, e.g. polystyrene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2327/00—Polyvinylhalogenides
    • B32B2327/06—PVC, i.e. polyvinylchloride
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2333/00—Polymers of unsaturated acids or derivatives thereof
    • B32B2333/04—Polymers of esters
    • B32B2333/12—Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2451/00—Decorative or ornamental articles

Abstract

In a method of producing a decorative section of plastics material in which a decorative film is applied to the visible face of the plastics, the decorative film is heat sealed onto a carrier film of softener-free plastics material and is then permanently bonded by pressure and heat to the section by way of the carrier film.

Description

SPECIFICATION Method of producing decorative sections The invention relates to a method of producing decorative sections of plastics material having a decorative coating on at least the visible face of the section.
In a known method of providing plastics sections with a decorative coating, the surface of the section is coated by applying a film by a hot embossing process. In this method an embossing ram or embossing roller made of metal, silicon or a composite material is brought to temperatures of between 100 and 300"C, and this embossing tool presses the film on to the surface of the section under a pressure of between 1 and 50 bars. As this happens, the surface of the section is slightly plasticised. A coloured or metallic coating of the film is released from the carrier layer of the film by pressure and heat and is firmly connected to the surface of the section by virtue of an adhesive layer provided on the coloured or metallic coating.
In this way, the section acquires a pleasing appearance -- at least over its exposed area.
Thus, cheaper material can be used forth section itself, since, when the known hot-embossing method is used, the visible area is coated to meet the requirements of good taste. Not only is the quality of the surfaces of sections improved in the visible area by the use of the known hotembossing method, but lettering and ornamentations of all kinds can be applied to the surfaces of plastics or metallic workpieces.
The known hot-embossing method can be primarily used on hard and resistant surfaces. This method is most effective when applied to planar surfaces of workpieces.
Curved or profiled workpiece surfaces create problems as regards the set-up and shape of the embossing ram. A particular disadvantage results from the fact that plastics materials containing softeners can be used as carriers only in certain circumstances. Since adhesion of the decorative coating of coloured materials or metal is achieved by means of an extremely thin adhesive coating on the surface of the workpiece, the softeners contained in the carrier have a disadvantageous and damaging effect. Tests have shown that the extremely thin adhesive layer may be caused to soften and swell as the result of travel of the softener.For the purpose of enabling certain practical requirements to be met (cold properties, necessary degree of softeners, transparency etc.), it is not always possible to make up travelresisting compositions that are sufficiently reliable on a long-term basis, so that flaking and detachment of the applied embossed coating has been observed. Furthermore, when bending operations are carried out on such soft and resilient workpieces or lengths of sectional material, the resultant stretching and compression forces have a considerable deleterious effect upon the adherence and appearance of the embossed coating due to the formation of folds or destruction of the mirror-finish in the case of a metallic coating. In addition, it has not hitherto been possible to achieve satisfactory results in that phase of the hot-embossing process involving extrusion of the material.Rather, it has been found that adhesion is unsatisfactory because of insufficient counter-pressure when the inherent strength of the material is too low, and considerable folding due to contraction has been observed.
The present invention seeks to provide a method of producing decorative sections of plastics material that enables even soft and resilient workpieces or sections of plastics material, having a Shore A hardness of between 40-100 to be provided with a coating by the hot-embossing method, within and outside the extrusion phase.
According to the invention there is provided a method of producing decorative sections of plastics material having a decorative coating on at least the visible face of the section, said decorative coating comprising a decorative film, said method comprising, in a first stage, sealing the decorative film by heat sealing onto a carrier film of plastics material containing no softener and, in a subsequent second stage, permanently bonding the decorative layer by pressure and heat to the section by way of the carrier film which latter constitutes an intermediate coating.
A particular advantage that has been found to accrue from this method, is that the carrier film, which may be planar, enables excellent embossing conditions to be established during heat-sealing and thus permits optimal coating with the coloured or metallic embossed film.
In contrast to the hot-sealing method of the prior art, the indirect hot embossing method of the invention enables firmly adhering decorative coatings of paint or metal also to be produced on soft plastics sections, even when these incorporate relatively sharply curved or undercut surfaces. Furthermore, the applied decorative layer is rendered substantially insensitive to compression and stretching by the interpolation of the carrier film.
In addition, the carrier film acts as a barrier against the travel of softeners contained in plastics sections. Thus, adverse effects upon the adhesive strength of the applied embossed coating due to the travel of softeners from the section are prevented.
It has been found to be particularly advantageous if the carrier film having the decorative coating can be directly bonded to the section during the shaping of the latter. In this connection, the heat that is necessary for producing the section and is also still present in the section after it has emerged from the shaping tool can be used for bonding the carrier film to the section. Because of the interposed carrier film, the decorative coating is not adversely affected in this type of bonding.
The carrier film is expediently made of hard polyvinyl chloride. However, it may, with advantage, also consist of rechlorinated polyvinyl chloride, acryinitril-butadiene-styrene mixed polymer (ABS), polymethylmethacrylate (PMMA), styreneacrylnitril mixed polymer (SAN) and all other possible compounds thereof. All other plastics materials that, among other things, are able to offer resistance to the travel of the softener from the section, can likewise be regarded as usable in the method of the invention.
Practical tests have shown that, for example, a 0.15 mm-thick ABS or PVC-ABS carrier film is not penetrated by the softener of a soft-PVC section.
In the case of the examples tested, the softener travelled only into the boundary-layer zones of the carrier film, and it was found that beyond a distance of a few hundredths of a millimetre, the proportions of softener in the carrier film could be regarded as practically nil.
The embossed film used in the method of the invention may also be films having the structure polyester film - separating layer - decorative coating -- adhesive layer, as well as films having the structure polyester film -- decorative coating -- adhesive layer. During heat-sealing, both types of film are bonded to the carrier film by way of the adhesive layer, and the film having the structure polyester film -separating layer decorative coating -- adhesive layer is separated from the polyester film during sealing.Since the separating layer consists of a very thin layer of wax, which is removed during separation or subsequently, the embossed film, following heatsealing, has a decorative coating which is unprotected on the exterior and is bonded to the carrier layer by the adhesive layer. When the decorative coating is made of metal, this can constitute a completely adequate structure on the carrier film for the further process of bonding to the section in accordance with the method of the invention.
In these cases, the metallic layer can be so insensitive that following bonding of the coated carrier film to the section, further protection of the metallic surface is not necessary.
If a layer of.chromium, for example, is used as the decorative coating, this layer of chromium has been found to be resistant to weather and corrosion, so that in contrast to the known polyester films having vapour-deposited aluminium coatings, no weather-resisting glass clear plastics protective coating is required on the metallised surface.
Where the decorative coating is more sensitive, it is recommended that use should be made of the film structure polyester film -- decorative coating -- adhesive layer. In this connection, particularly when the carrierfilm, having a decorative coating, is bonded to the section during the shaping of the latter -- which procedure is also known as extrusion welding -- it has been found that the carrier film with the decorative layer is protected by the additional polyester covering, i.e. the polyester carrier for the decorative coating, since over-stretching of the system of layers is prevented during the extrusion welding process.Furthermore, the polyester film provides additional protection for the decorative coating during subsequent use of the decorative section; for example, protection is afforded against abrasion or other external influences. In the case of one example, the formation of cracks in a weather-resisting and corrosion-resisting chromium coating was examined and a comparison was made between the chromium coating of the prior art and that provided by the method of the invention, the tests being carried out at room temperature and after thermal ageing for one hour at 800C.
a) Room temperature: 1. Bending to cause radiusing across the transverse axis, with the chromium layer on the outside; 1.1 Directly embossed by the prior art method; cracks begin to form at 5% elongation; 1.2 Indirect embossing by the method of the invention; cracks begin to form at 60% elongation.
2. Elongation in the tensile-testing machine; 2.1 Directly embossed by the prior art method; cracks being to form at 5% elongation; 2.2 Indirect embossing by the method of the invention; cracks begin to form at 60% elongation.
b) Thermal ageing for one hour at 800 C: 1. Bending to cause radiusing across the transverse axis, with the chromium layer on the outside; 1.1 Directly embossed by the prior art method; cracks begin to form at 2% elongation; 1.2 Indirect embossing by the method of the invention; cracks begin to form at 20% elongation.
2. Elongation in the tensile testing machine; 2.1 Directly embossed by the prior art method; cracks begin to form at 2% elongation; 2.2 Indirect embossing by the method of the invention; cracks beging to form at 20% elongation.
The above tests were carried out on a softenercontaining PVC section having a Shore A hardness of 85.

Claims (9)

1. A method of producing decorative sections of plastics material having a decorative coating on at least the visible face of the section, said decorative coating comprising a decorative film, said method comprising, in a first stage, sealing the decorative film by heat sealing onto a carrier film of plastics material containing no softener and, in a subsequent second stage, permanently bonding the decorative layer by pressure and heat to the section by way of the carrier film which latter constitutes an intermediate coating.
2. A method according to claim 1, wherein the carrier film having the decorative coating is directly bonded to the section during the shaping of the latter.
3. A method according to either of claims 1 or 2, wherein the carrier film consists of hard polyvinyl chloride.
4. A method according to either of claims 1 or 2, wherein the carrier film consists of acryl-nitrilbutadiene-styrene mixed polymer.
5. A method according to either of claims 1 or 2, wherein the carrier film consists of polymethylmethacrylate.
6. A method according to either of claims 1 or 2, wherein the carrier film consists of styreneacryl-nitril mixed polymer.
7. A method according to either of claims 1 or 2, wherein the carrier film consists of polystyrene.
8. A method according to any one of claims 3 to 8, wherein the carrier film consists of compounds of any one or more of rechlorinated polyvinyl chloride, acrylnitril-butadiene-styrene mixed polymer (ABS), polymethylmethacrylate (PMMA), styreneacrylnitril mixed polymer (SAN), and hard polyvinyl chloride.
9. A method of producing decorative sections of plastics material as claimed in claim 1, substantially as hereinbefore described.
GB8136399A 1980-12-23 1981-12-02 Producing a decorative section Expired GB2093767B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3048588A DE3048588C2 (en) 1980-12-23 1980-12-23 Process for the production of decorative profiles

Publications (2)

Publication Number Publication Date
GB2093767A true GB2093767A (en) 1982-09-08
GB2093767B GB2093767B (en) 1984-08-01

Family

ID=6120021

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8136399A Expired GB2093767B (en) 1980-12-23 1981-12-02 Producing a decorative section

Country Status (5)

Country Link
JP (1) JPS57181862A (en)
BR (1) BR8105479A (en)
DE (1) DE3048588C2 (en)
FR (1) FR2496553A1 (en)
GB (1) GB2093767B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4891084A (en) * 1986-03-11 1990-01-02 Raychem Limited Method of making a curved composite article

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3227061A1 (en) * 1982-07-20 1984-04-05 Linnemann-Schnetzer Kg, 4730 Ahlen HOUSING, IN PARTICULAR PRESSURE TANK, WITH A SHIELD AND METHOD FOR ATTACHING THE SHIELD
DE3805693A1 (en) * 1988-02-24 1989-02-23 Assmann F W & Soehne Motor-vehicle emblem or similar body made of plastic
AT402793B (en) * 1993-11-02 1997-08-25 Head Sport Ag BALL RACKETS AND METHOD FOR THE PRODUCTION THEREOF
DE29704865U1 (en) * 1997-03-18 1997-06-19 Schaetz Fahrzeugtechnik Gmbh I Decorative frame for the headlights of motor vehicles
DE102007004229A1 (en) * 2007-01-27 2008-07-31 Rehau Ag + Co Decorable plastic profile and method for its production
DE102009058758B4 (en) * 2009-12-17 2020-01-16 Volkswagen Ag Air vent rider for a vehicle air vent

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1479111A1 (en) * 1965-06-04 1969-05-29 Dynamit Nobel Ag Process for the production of two-layer or multi-layer molded parts
FR2164483A1 (en) * 1971-12-21 1973-08-03 Kleber Renolit Plastique Plasticised covers - lacquered on the inner face to inhibit plasticiser migration into the support
LU65498A1 (en) * 1972-06-12 1972-10-23

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4891084A (en) * 1986-03-11 1990-01-02 Raychem Limited Method of making a curved composite article

Also Published As

Publication number Publication date
DE3048588C2 (en) 1982-08-05
BR8105479A (en) 1982-09-08
FR2496553A1 (en) 1982-06-25
FR2496553B1 (en) 1985-05-10
DE3048588A1 (en) 1982-07-01
GB2093767B (en) 1984-08-01
JPS57181862A (en) 1982-11-09

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PCNP Patent ceased through non-payment of renewal fee