Tape with a reinforced or non-reinforced self-adhesive strip

Abstract: The backing strip (2) is provided with additional means of adherence (3-6-7) in order to increase the adhesive force between the backing strip (2) and the adhesion strip (1) and to avoid the curling of the latter when it is applied.

Description: The invention is for a tape on a roll or consisting of separate pieces cut in advance with by preference but not exclusively a self-adhesive adhesion strip which may or may not be reinforced and which may for example be made of butyl or another bituminous or rubbery material and which is intended to be used primarily for the installation of rubber sealing strips for example in and on car doors but which can also be used for other applications. Tape on a roll or tape consisting of separate pieces cut to size in advance and which contains a butyl, bituminous or rubbery adhesive adhesion strip on which a backing strip for example of plastic or paper, such as silicon paper is provided so that it can be removed, which adhesion strip may or may not be covered by a protective strip of plastic or paper such as silicon paper for the temporary protection of the adhesion strip is known. To use the self-adhesive butyl, bituminous or rubbery adhesion strip on a roll or in separate pieces, the protective strip is removed from the adhesion strip, the adhesion strip is for example applied to a rubber sealing strip which is installed in or on a car door, after which te backing strip is removed. It has proved that this tape has the disadvantage during use that both the protective strip and the backing strip start to curl and come away easily and prematurely from the tape. As a result it is possible that during attachment the adhesion strip sticks to surfaces for which it is not intended. At the same time air channels are created between the backing strip, the protective strip and adhesion strip, with the result that the quality of attachment of the adhesion strip will be reduced as result of drying and/or contamination with dust. In order to remedy this a tape according to the main characteristic of the invention has been realized in which the backing strip is provided with additional means of adherence in order to make the adhesive force between the backing strip and the adhesion strip greater than that between the adhesion strip and the protective strip, so that not only does the protective strip always first come loose from the adhesion strip but that also the adhesion strip is prevented from curling and the creation of air channels between the various strips is avoided. By way of example, and without in any way being exhaustive, a more detailed description of some preferred embodiments of the tape according to the invention are described in more detail below. This description refers to the attached drawing where: fig. 1 shows part of a tape with for the sake of clarity the strips pulled loose; fig. 2 shows an enlarged cross-section of the same tape; fig. 3 shows part of a tape with for the sake of clarity the strips pulled loose, where use is made of a two-part backing strip; fig. 4 shows a cross-section of the same tape; fig. 5 shows part of a tape in its most simple embodiment with for the sake of clarity the strips pulled loose; fig. 6 shows a cross-section of the same tape. In the embodiment of the tape shown in figures 1 and 2, it will be noticed that the tape contains a self-adhesive butyl, bituminous or rubbery adhesion strip 1 intended for the flat and permanent gluing of an object in a suitable location, such as for example on rubber sealing strips prior to installation in and on motorcar doors. This adhesion strip is glued to a backing strip 2 made by preference from silicon paper in which perforations 3 have been provided which are covered on the rear side by an adhering strip 4. As a result the butyl or bituminous material of the adhesion strip adheres in the perforations 3 and to the adhering strip 4 and firm and adequate attachment of the adhesion strip 1 to the backing strip 2 is obtained. The face of the adhesion strip 1 is covered for protection by a protective strip 5. When separate pieces of adhesion strip are to be used, several adhesion strips with their backing and adhering strips are placed one behind the other on the same protective strip 5. To apply a butyl, bituminous or rubbery adhesion strip 1 on any object whatsoever, the protective strip 5 is removed from the adhesion strip without the adhesion strip 1 coming loose from the backing strip 2 and without the adhesion strip starting to curl, which is a consequence of the special embodiment of the backing strip 2 with perforations 3 and adhering strip 4. After the adhesion strip 1 is firmly fixed, the backing strip 2 with the adhering strip 4 is easily removed. In figures 3 and 4 it will be noticed that the backing strip 2 consists of two separate sections which run along the length of the tape parallel at a distance from one another on the back of the butyl, bituminous or rubbery adhesion strip 1, so that a gap 6 is created which on the back is covered by an adhering strip 4. As a result the butyl or bituminous material of the adhesion strip lodges sufficiently firmly in the gap 6 and on the adhering strip 4. It goes without saying that use can also be made of a single backing strip 2 provided with a lengthways gap. In figures 5 and 6 it will be seen that the tape may also consist of a butyl, bituminous or rubbery adhesion strip 1 applied to a backing strip 2 made by preference of silicone paper where several narrow lines 7 of the surface material have been removed from the silicon surface by mechanical, chemical or other means, so that the butyl or bituminous adhesion strip 1 becomes firmly attached to them, as is the case when perforations or gaps are used. The surface material can also be removed in the form of dots or circles.

Claims: Tape with a self-adhesive adhesion strip (1) which may or may not be reinforced stuck to a backing strip (2) which is pulled off the adhesion strip after the adhesion strip is stuck to an object requiring same, characterized in that the backing strip (2) is provided with additional means of adherence (3-6-7) in order to increase the adhesive force between the backing strip (2) and the adhesion strip (1) and to avoid the curling of the latter when it is applied. Tape according to claim 1, characterized in that the rear side of the backing strip (2) with additional means of adherence (3-6-7) is covered by an adherence strip (4) for increasing the adhesive force of the adhesion strip (1) on the backing strip (2) and that the face of the adhesion strip (1) is covered by a protective strip (5) for the temporary covering and protection of the adhesion strip (1) whereof the adhesive power is less than that between the backing strip (2) and the adhesion strip (1). Tape according to claim 1, characterized in that several separate pieces of backing strip (2) and adhesion strip (1) are applied one behind the other on a continuous protective strip (5), which pieces can be removed individually from same. Tape according to claim 1, characterized in that the additional means of adherence consist of perforations (3) provided in the backing strip (2) adjoining the adhesion strip (1), which perforations are covered on the back by an adherence strip (4). Tape according to claim 1, characterized in that the additional means of adherence consist of a lengthways gap (6) provided in the backing strip (2) adjoining the adhesion strip (1), which gap is covered on the back by an adherence strip (4). Tape according to claim 4, characterized in that the gap (6) is formed by two lengthways backing strips (2) applied at a distance from one another. Tape according to claim 1, characterized in that the additional means of adherence consist of small patches (7) of material removed from the sticking surface of the backing strip (2) which have the form of small lines, dots or circles and to which the adhesion strip (1) is stuck.

Inventors: NAUWELAERTS FRANS, NAUWELAERTS, FRANS
Applicants: VARITAPE BVBA, VARITAPE, BESLOTEN VENNOOTSCHAP MET BEPERKTE AANSPRAKELIJKHEID
Application year: 1996
Main classification: C09J7
IPC codes: C09J7