Patent Grant
6962748
The invention relates to a masking tape, especially for covering certain parts when painting cars, as well as to the use of this tape. In particular, masking is provided for medium to large surfaces, which must not come into contact with paint in touch-up work in automobile paint shops.
Such masking tapes or shrouds are known and their use is widespread. Standard materials are, for example, 50 g weight special papers or newsprint, and also folded plastic hoods (approximately 30 μm thick or 30 g/m2) or “endless” sheets from a large roll (2 m wide) as well as “2 in 1” systems as folded polyethylene sheets with adhesive tape, including also polyethylene-coated papers with adhesive tape.
Such masking systems must fulfill especially the following requirements:
The previously known masking tapes and the like fulfill these requirements only to a limited extent.
It was an object of the invention to provide a remedy here and, in particular, to create a masking tape, for which an inexpensive, absorptive or adhesive material can be used, which has, in particular, good adhesion for paint, etc. (paint adhesion).
The masking tape comprises:
Another embodiment comprises the adhesive tape as a heat-resistant adhesive tape for the automobile painter, a so-called fine line tape, with a heat resistance especially at temperatures up to 130° C. (1 hour), especially one with a sheet backing of polypropylene or particularly of soft PVC.
The adhesive tape is contemplated to be 15 to 75 mm wide and, in particular 19 to 33 mm wide.
The masking material consists of paper, woven fabric, nonwoven fabric or a sheet capable of adhering.
It is further contemplated that the masking material is unbleached Kraft paper, having a weight of 30 to 40 g/m2 and a width especially of 15 to 50 cm and particularly of 20 to 40 cm.
The masking sheet has a thickness of 7 to 40 μm and especially of 8 to 20 μm, consists especially of polyolefin, particularly polyethylene and especially is corona pretreated, and the width, in particular, is 0.5 to 2 m.
In another embodiment, the masking sheet is folded so that it can be extended, follows, in particular, the external dimensions of the masking material and is folded against this is accordion fashion.
In another embodiment, the edge region of the pressure-sensitive adhesive composition, to which the masking material adheres, is 1 to 5 and particularly 2 to 4 mm wide and the thereon adjoining edge region of the pressure-sensitive adhesive composition, to which the masking sheet adheres, is 1 to 5 and, in particular, 2 to 4 mm wide.
In another embodiment, the masking tape is rolled up into a roll, the masking sheet being folded and the height of the roll corresponding approximately to the width of the masking material plus the width of the adhesive tape.
The invention also contemplates the use of the masking tape for masking parts, which are not to be painted, especially when painting automobiles.
With that, the invention combines the very good properties of absorptive or adhesive material with respect to the adhesion of paint and the very good properties of sheets in relation to reliability against bleed-through in a convenient product.
With that, the product consists of three products in one and therefore can be referred to as a “3 in 1” product. The components are an absorptive or adhesive material, an adhesive tape with a flexible sheet backing and a sheet. The following are preferred:
The absorptive material, especially woven material, nonwoven material or paper, is intended to absorb the heavier application of paint in the edge region of the painting and to adhere reliably also after oven drying, so that paint cannot fall onto the still soft, freshly painted surface. The sheet is prepared by the corona treatment preferably so that a paint mist is fixed reliably. Furthermore, the sheet, for example, prevents paint bleeding through the paper onto the freshly painted surface.
In particular, the following product advantages result:
The following are the product advantages over the “2 in 1” system:
In the following, the invention is described by means of an example without, however, being limited unnecessarily. In the drawing,
In detail, the
The folding of the masking sheet 6 is known and is undertaken particularly in the manner known and familiar to the user, the whole of the masking tape being rolled up into a roll for easier handling. Preferably, the folding is carried out so that the folds of the masking sheet 6 lie on top of one another in the direction of the masking material 5 and are held by the latter in the folded state. This has the advantage, for example, that an automobile, equipped with an inventive masking tape and prepared for painting, can still be moved and entered, while the masking tape is installed but not yet unfolded. Only when the automobile is at its appointed place at the appointed time, is the masking tape unfolded by slightly lifting the masking material 5, that is, the masking sheet 6 falls down without the intervention of further measures or work.
| Number | Date | Country | Kind |
|---|---|---|---|
| 100 21 243 | Apr 2000 | DE | national |
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| Number | Date | Country |
|---|---|---|
| 29617896 | Dec 1996 | DE |
| 296 17 896 | Jan 1997 | DE |
| 296 19 424 | Nov 1997 | DE |
| 0 999 251 | May 2000 | EP |
| WO 0015727 | Mar 2000 | WO |
| Number | Date | Country | |
|---|---|---|---|
| 20020114946 A1 | Aug 2002 | US |
