DE102009022980A1 - Protective film for surfaces - Google Patents

Abstract

The invention relates to a protective film (1) for surfaces (22), in particular of painted surfaces of vehicles. It is provided that the protective film (1) comprises a carrier layer (2) made of a fleece or foam and a surface side of the carrier layer (2) with an adhesive (3) is coated. The protective film (1) can be used to produce a shaped body (12) whose contour corresponds to the contour of the surface (22) to be protected. To form the contour, the protective film (1) or a blank (11) thereof may be subjected to a thermal molding process.

Description

The Invention relates to a protective film for surfaces, especially for surfaces of motor vehicles such as cars, trucks, buses and two-wheeled vehicles, Rail, water and air vehicles, a molded part of such Protective film and uses of the protective film and the molded part.

A Variety of industrial products has surfaces which must be protected against damage. Such surfaces may be, for example around polished surfaces, surfaces that have a Wear color layer, or other protective surfaces act. The transport of these products from the place of manufacture to End user is at high risk of damage connected to this surface. Such damage would, however, reduce the value of the product and reduce it Circumstances prevent a decrease of the product by the end user.

motor vehicles Both in indoor and outdoor a variety of painted surfaces. Loading the motor vehicles and their transport must be done in such a way that the painted surfaces not by stone chipping or comparable Events are damaged. It is therefore common become, such surfaces with a protective film too provided after completion of the painting and before loading of the motor vehicle applied to the painted surfaces becomes. In addition to painted surfaces are protective films also for polished metallic surfaces or Wooden surfaces, often in the interior of a Motor vehicle are used. Such surfaces are hereinafter referred to as "surfaces to be protected".

Known Protective films generally have a foil-shaped carrier layer on, on a surface side with an adhesive layer is coated. The protective film opens with its adhesive side the surface to be protected is laminated. there It is important that the protective film evenly is applied to inclusions of air and moisture to avoid. Such inclusions are known the cause of discoloration, which is also an impairment represent the sensitive surface to be protected can. The protective film is usually removed manually, as soon as the product whose surfaces have such protection have reached its destination. It must be the Protective film without cracking or delamination of the adhesive layer from the backing layer of the delicate surface let withdraw.

The above description of the application method of the protective film on the delicate surface lets recognize That great care is required to clear the protective film of inclusions. Special Difficulties exist on curved surfaces, so that the application of the protective film as a whole a complex Process is.

Out EP 0 959 119 A2 a protective film is known which comprises a layer of a nonwoven fabric, wherein the layer is laminated on one or both sides with a polymer layer and an adhesive is applied to a polymer layer.

task The invention is to the disadvantages of the prior art remove. It is intended in particular a protective film for surfaces which are easy and quick to be protected Surface can be applied and air pockets effectively prevented.

These The object is achieved by the features of claims 1, 9, 11 and 14 solved. Advantageous embodiments The invention results from the features of the subclaims.

To According to the invention is a protective film for Surfaces, especially of painted surfaces provided by vehicles, wherein the protective film is a carrier layer of a nonwoven or foam and a surface side the carrier layer is coated with an adhesive.

Between the surface side of the carrier layer, with the adhesive is coated, and the adhesive may form an anchor layer be. The anchor layer can on the one hand the adhesion of the adhesive improve on the carrier layer and / or on the other one Form barrier layer for the adhesive, so that an entrance prevents components of the adhesive in the carrier layer For example, the carrier layer with a layer of be coated with a primer. An anchor layer, however, is not mandatory.

The Adhesive is preferably a pressure-sensitive adhesive. The pressure-sensitive adhesive is preferably selected from the group consisting of pressure-sensitive adhesives based on ethylene vinyl acetate, pressure-sensitive adhesives based on Polyisobutylene and combinations thereof.

The Adhesive should be a paint-compatible adhesive, to damage painted surfaces to prevent. The adhesive may also be UV stable.

The adhesives are preferably with applied by conventional coating method to the carrier layer. Alternatively, they can be laminated on a grid coating screen printing process, the carrier layer.

The Strength of the adhesive on the carrier layer coated, should be between 1 μm and 100 μm, preferably between 3 μm and 70 μm and especially preferably between 5 .mu.m and 50 .mu.m.

The other surface side of the carrier layer, d. H. the Area side of the carrier layer, not with the adhesive coated, can with a UV-resistant coating be coated from a polymeric material. The polymeric material is preferably a polyolefinic material. Especially preferred For example, the polymeric material is a polyethylene-based material or a copolymer thereof or based on polypropylene or a copolymer thereof. The UV resistance of the UV-resistant layer is due to the addition of UV blockers and / or stabilizers reached the polymeric material.

The UV-resistant layer should have a thickness of 5 microns to 50 microns, preferably 8 microns to 40 microns and especially preferably from 10 microns to 30 microns.

The Carrier layer of the protective film consists of a nonwoven fabric or a foam. The respective layer thicknesses can be chosen arbitrarily and are the respective requirements adapt. Preferred materials from which the carrier layer formed are polymers, polyethylene (PE), polypropylene (PP), Polyesters (PES), polyethylene terephthalate (PET), copolymers of these Compounds and mixtures of these compounds Ver. The carrier layer can be UV-resistant by the addition of blockers and / or stabilizers be equipped. However, this is not mandatory.

The Backing should be 5 μm thick 50 microns, preferably 8 microns to 40 microns and more preferably from 10 microns to 30 microns.

These it is at the carrier layer to a carrier layer from a nonwoven fabric, so the nonwoven fabric can advantageously from a Spunbond or a water jet fleece are obtained. A water jet fleece is made by solidification of filaments by means of thin water jets achieved with high pressure, which swirl the filaments. The spunbond or the water jet fleece can a calendering process have been subjected. However, this is not mandatory.

The carrier layer of nonwoven fabric should have a basis weight of 1 g / m ² to 120 g / m ² , preferably 5 g / m ² to 100 g / m ² and more preferably 10 to 80 g / m ² .

is the carrier layer is a nonwoven, so is preferably a surface side the carrier layer with an adhesive and the other surface side with the UV-resistant layer of a polymeric material coated.

If the carrier layer is a layer of a foam, then it may be open-pore or closed-pored. The foam should have a weight per unit area of 1 g / m ² to 120 g / m ² , preferably 5 g / m ² to 100 g / m ² and more preferably 10 g / m ² to 80 g / m ² .

is the carrier layer is a foam, so is preferably one Surface side coated with the adhesive while the other surface side is not coated.

The Side of the adhesive which faces away from the carrier layer, can be provided with a release liner. The separation layer is here before applying the protective film to a sensitive surface away. The separating layer is preferably made of paper or a Plastic film.

The Protective film is, optionally after removal of the release liner, so on the surface of a product to be protected applied so that the adhesive surface of the upper surface facing is. After application, the protective film can be pressed become. At the destination of the product, the protective film may then be deducted.

The Protective film protects the surface to be protected against UV radiation for a period of up to 18 months and before the action of wind with wind speeds of up to to 160 km / h.

The Protective film can be used to produce a molded part. This is particularly advantageous when the inclusion of Air between the protective film and the surface to be protected a product must be prevented. Compared to one Protective film allows the invention Molding a faster and safer application to the protected Surface.

The Molded part is preferably by cutting the protective film under Preservation of the blank and, if desired, by adaptation the contour of the blank to the contour of the surface receive.

The molding preferably has a contour corresponding to the contour of the surface to which the molding is to be applied. Under contour of the surface to which the molding is to be applied, while the three-dimensional surface is ver stood, which constitutes the surface to be protected. It is this three-dimensional surface that is given to the protective film. If, for example, the surface to be protected has beads and / or elevations, corresponding beads and / or elevations are formed in the contour of the molded part.

to Production of the molding, the protective film by means of a separation process be brought to the length and width that are required to cover the given surface to be protected. Suitable separation methods are stamping, cutters or lasers. If can then be required on the blank thus obtained the contour of the be simulated to be protected surface. This can be done, for example, by means of a thermal shaping process respectively. This molding process can be done in a special tool be executed, in which the blank is introduced. There The blank from the protective film are thermoformed can, are materials made of plastics that can be used by process thermal shaping.

Regarding further manufacturing process is on the German applications no. 10 2008 027 368.6 and 10 2007 057 175.7 directed.

The Cropping and contouring can be done on site respectively. In this case, the molded part is only at the place of its use produced. Alternatively, the moldings can be made centrally and then transported to the place of use.

at An embodiment of the molding may be applied to the insert to be dispensed with a separating layer. This assumes that yourself the adhesive from the surface side of the protective film easily can be removed. One use of a release liner is then only necessary for the lowest part of the mold if several parts are in contact with each other to be stacked. Likewise, the bottom of a transport container be equipped so that the stored there, to the Floor adjacent molding is not liable to this. Alternatively it is Also, the packaging of a stack of moldings in a film possible. The number of shaped parts of a stack depends on the process conditions the user and / or the size of the transport container, to absorb the moldings.

The Moldings are used to protect surfaces from damage, for example, by mechanical damage or the Influence of radiation such as UV radiation or visible light, suitable. Such surfaces include surface treated Surfaces, especially painted and / or polished Surfaces. The moldings are in particular for protection of such surfaces on vehicles such as motor vehicles, For example, passenger cars, trucks, buses and Two-wheelers, rail vehicles, watercraft, for example Boats, and aircraft suitable.

to Application, the molding is preferably on the protected Surface applied and, if necessary, to the protective surface pressed flat. After transporting the product containing the protected Surface has, to its destination, the Removed molded part.

at Vehicles, the molding is preferably on the protected Surface after the painting process or also after pass the assembly process, for. B. after reporting point 8, d. H. of the final quality control after vehicle assembly and applied by two-dimensional pressing. has the molding on a release paper, so this is before hanging up away. The laying on and pressing can by means of a Robot or semi-automated realized. Advantageous is that over an application of foil material do not pay attention to air pockets. Such air pockets do not arise because the structure of the invention Molding allows a simpler and faster processing. In one embodiment, hanging up and pressing be carried out by means of a robot with negative pressure holding the moldings. The use of a robot allows the reduction of personal expenses to a minimum. To the transport of the object to be protected to the destination is the molding by manual or mechanical peeling removed again.

The Invention will become more apparent with reference to drawings explained. Show

1 a schematic cross-sectional view of a first embodiment of a protective film according to the invention;

2 a schematic cross-sectional view of a second embodiment of a protective film according to the invention;

3 a schematic cross-sectional view of a third embodiment of a protective film according to the invention;

4 a schematic cross-sectional view of a fourth embodiment of a protective film according to the invention;

5 a schematic cross-sectional view of a fifth embodiment of a protective film according to the invention;

6 a schematic cross-sectional view of a sixth embodiment of a protective film according to the invention; and

7a E an exemplary process flow for applying a molding according to the invention on a surface to be protected.

In the 1 to 6 are sectional views of embodiments of the protective film according to the invention 1 shown, which make up the sequence of individual layers that make up the protective film 1 is composed, it can be seen.

In the 1 shown first embodiment of the protective film according to the invention 1 has a carrier layer 2 from a nonwoven fabric, on whose one face side an adhesive 3 is coated and on the other surface side of a UV-resistant coating 4 is coated.

In the 2 shown second embodiment of the protective film according to the invention 1 corresponds to the first embodiment, except that an anchor layer 5 between the carrier layer 2 and the adhesive 3 is trained.

At the in 3 shown third embodiment, the adhesive is additionally with a release liner 6 Mistake. Incidentally, the third embodiment corresponds to the second embodiment.

In the 4 shown fourth embodiment of the protective film according to the invention 1 has a carrier layer 2 from a foam, on whose one face side an adhesive 3 is coated, while the other surface side is not coated.

In the 5 shown fifth embodiment of the protective film according to the invention 1 corresponds to the fourth embodiment, except that an anchor layer 5 between the carrier layer 2 and the adhesive 3 is trained.

At the in 6 shown sixth embodiment, the adhesive is additionally with a release liner 6 Mistake. Incidentally, the sixth embodiment corresponds to the fifth embodiment.

In the 7a -E will be making a molded part 11 shown on a product 21 with a surface to protect 22 ( 7a ) should be applied. The representations are each sectional representations.

In the 7a shown surface to be protected 22 a product 21 has a multi-dimensional surface.

In 7b is the cut 11 shown, consisting of a protective film according to the invention 1 has been produced. The width and length of the blank 11 is determined by the dimensions of the surface to be protected. For the sake of simplicity, the blank has 11 only one carrier layer 2 and the adhesive 3 on. Of course, the blank may have further layers, such as an anchor layer, UV-resistant coating and release liner.

7c shows the state of the molding 12 after the cut 11 has undergone a thermal molding process. It can be seen that the contour of the molding 12 the contour of the surface to be protected 22 of the product ( 7d ).

In 7e is the molding 12 on the surface to be protected 22 applied and covered completely.

1

protector

2

support layer

3

adhesive

4

UV-resistant layer

5

anchor layer

6

separating layer

11

Cut from the protective foil 1

12

Shaped part from blank 11

21

product

22

surface of the product to be protected 21

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• EP 0959119 A2 [0006]
• - DE 102008027368 [0031]
• - DE 102007057175 [0031]

Claims (16)

Protective film for surfaces, in particular of painted surfaces of vehicles, the protective film ( 1 ) a carrier layer ( 2 ) comprises a fleece or foam and a surface side of the carrier layer ( 2 ) with an adhesive ( 3 ) is coated. Protective film according to claim 1, characterized in that between the surface side of the carrier layer ( 2 ), which are mixed with the adhesive ( 3 ), and the adhesive ( 3 ) an anchor layer ( 5 ) is trained. Protective film according to claim 1 or claim 2, characterized in that the anchor layer ( 5 ) a layer of an adhesion promoter and / or a barrier layer for the adhesive ( 3 ). Protective film according to one of the preceding claims, characterized in that the adhesive ( 3 ) is a pressure sensitive adhesive selected from the group comprising ethylene vinyl acetate based pressure sensitive adhesives, polyisobutylene based pressure sensitive adhesives and combinations thereof. Protective film according to one of the preceding claims, characterized in that the other surface side of the carrier layer ( 2 ) with a UV-resistant layer ( 4 ) is coated from a polymeric material. Protective film according to claim 5, characterized in that that the polymeric material is a polymeric material based on Polyethylene or a copolymer thereof. Protective film according to claim 5 or claim 6, characterized in that when the carrier layer ( 2 ) is a nonwoven fabric, a surface side with the adhesive ( 3 ) and the other surface side with the UV-resistant layer ( 4 ) is coated from a polymeric material. Protective film according to one of claims 1 to 5, characterized in that when the carrier layer ( 2 ) is a foam, one surface side with the adhesive ( 3 ) and the other surface side is not coated. Molded part of a protective film ( 1 ) according to one of claims 1 to 8. Molding according to claim 9, characterized in that the contour of the molding ( 12 ) the contour of the surface ( 22 ), to which the molded part ( 12 ) should be applied. Process for producing a molded article from a protective film according to one of Claims 1 to 8, characterized in that the protective film ( 1 ) or a blank ( 11 ) of which heat is exposed to the contour of the protective film ( 1 ) or the blank ( 11 ) to the contour of the surface ( 22 ) to which the molded part ( 12 ) is to be applied. A method according to claim 11, characterized in that the adaptation is carried out in a mold into which the protective film ( 1 ) or a blank ( 11 ) is inserted. A method according to claim 11 or claim 12, characterized in that the protective film ( 1 ) is cut before cutting by cutting or punching. Use of a molding according to claim 9 or claim 10 for the protection of surfaces ( 22 ), especially of painted surfaces of vehicles. Use according to claim 14, characterized in that the molded part on the surface to be protected ( 22 ) is launched. Use according to claim 15, characterized in that the molded part after laying on the surface to be protected ( 22 ) is pressed flat.