Loading patent…
AssigneeTesa SE
InventorsNicolai Böhm, Jobst-Waldemar Klemp, Thorsten Krawinkel, Bernd Lühmann
Estimating the term…
Self-adhesive protective film for freshly painted automobiles, comprising a backing layer and a self-adhesive layer comprising a three-component mixture of vinyl acetate copolymers.
A self-adhesive protective film for the surface protection applications for painted vehicles or vehicle parts, comprising a single-ply or multi-ply backing layer, particularly a polyolefinic backing layer, and a self-adhesive layer, characterized in that the self-adhesive composition comprises
The self-adhesive protective film of at least one of the preceding claims, characterized in that the thickness of the backing layer is between 20 and 80 μm, including where appropriate an adhesion promoter layer disposed between the backing layer and the adhesive layer.
The self-adhesive protective film of at least one of the preceding claims, characterized in that the backing layer comprises at least one light stabilizer in an amount of at least 0.15% by weight.
The self-adhesive protective film of at least one of the preceding claims, characterized in that the UV permeability of the protective film in the wavelength range from 290 to 360 nm is below 1%.
A process for producing a self-adhesive protective film of at least one of the preceding claims by simultaneous coextrusion of adhesive layer, backing layer, and further, auxiliary layers.
The use of a protective film of at least one of the preceding claims on freshly painted surfaces of automobiles or automobile parts as assembly or transit protection.
The use of a protective film of at least one of the preceding claims for protecting sensitive paint, metal, plastic or glass surfaces.
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Characterised by their carriers: plastics; Metallised plastics
Characterised by the adhesive composition: pressure-sensitive adhesives [PSA]
Pressure-sensitive adhesives [PSA]: based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
Applications of adhesives in processes or use of adhesives in the form of films or foils: for protecting painted surfaces, e.g. of cars
Term end not estimated
The invention relates to a protective film which rapidly achieves a high level of adhesion to fresh motor vehicle finishes but nevertheless can be removed again without great force after long bonding times and which for that reason is outstandingly suitable for the transit protection of new vehicles in order to protect the sensitive paint surfaces against soiling and damage.
The preservation and protection of motor vehicles in transit from manufacturer to dealer has long been common practice.
The conventional method of preserving automobiles involves applying paraffin waxes involves in a thickness of from 5 to 20 μm. However, it has been found that, especially on horizontal areas of the vehicles, such as hood, roof, and trunk lid, such a thin and usually nonuniform coat does not afford adequate protection against external influences, such as the corrosive effect of bird droppings, for example.
All of the example films were produced by coating a corona-pretreated polyolefin backing with the toluenic solutions of the individual adhesive formulas. The backing was 60 μm thick and its composition was as follows:
60 parts polypropylene block copolymer Daplen FFC 2012 (PCD)
25 parts polypropylene homopolymer Daplen KFC 201 (PCD)