DE2537516A1 - DUCT TAPE - Google Patents

Description

THE KENDALL COMPANY, 95 West Street, Walpole, Massachuse tts, USA

duct tape

The invention relates to an adhesive tape consisting of a woven carrier, on one side of which a pressure-sensitive tape Adhesive is applied and the elastic warp yarn has that of inelastic nylon warp yarn are interspersed and lie afloat on one side of the carrier over a plurality of weft yarns.

Adhesive tapes of the type mentioned above are known (DT-OS 2 005 913). In these, the adhesive layer forms the wearer a continuous blanket, although this may also have individual perforations around the adhesive tape to make air permeable. In the relaxed state, the adhesive tape assumes a non-even surface, the is formed by alternating transverse ribs and grooves.

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In the adhesive tapes of the above known type, the disadvantage arises that _t when they are wound into a roll, the adhesive of a turn of the roll has a tendency to cause bonding with the uncoated back of the overlying bond. The object of the invention is to avoid this risk of sticking when the adhesive tape is rolled up. This object is achieved in that, according to the invention, in an adhesive tape of the type mentioned at the outset, the elastic warp yarns containing elastomeric filaments are stretched in the carrier and the filaments of the inelastic multifilament nylon warp yarn have a denier between two and a half and five and a half denier.

Thanks to the fact that the elastic warp yarns in the woven carrier are stretched, the latter decreases in the relaxed state an undulating surface with transverse grooves extending along the elastic warp yarns. The magnification the titer of the filaments of the nylon yarns of the carrier to two and a half to five and a half denier brings one Improvement of the rollability of the adhesive tape with it. The inelastic ones lying next to one another are useful Nylon warp yarns are interwoven in opposing weave patterns which has been found to provide retractability of the adhesive tape is further improved. It can be assumed that the improvement in rollability is likely to

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stems from the fact that the tiny loose filaments in certain Warp yarns are greatly reduced in number / whereby it is precisely these small filaments that make the adhesive bond with the adhesive create a layer of the adjacent bond.

Every inelastic nylon warp yarn is advantageously a 70/2, 17 filament yarn, which therefore has a titer of about four denier. The other inelastic warp yarns are suitably cotton yarns. The warp yarns are advantageous distributed over the support in a ratio such that an elastic warp yarn with elastomeric filaments every seventh to thirteenth warp yarn forms.

Several exemplary embodiments of a carrier of an adhesive tape according to the invention are schematically shown in the drawing shown in a plan view. Figures 1 and 2 show different weave patterns of such a carrier.

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Each of the figures shows schematically a part of the carrier material. In each case, the warp yarns are denoted by W ₁ , W “point seat, the last of the warp yarns W 1 in FIG. 1 and W ₁ in FIG. 2 representing a repetition of W 1. In the same way, the weft yarns are designated F ₁ to F _g , where F _{g is} a repetition of F _{1 in} each weaving pattern.

The carrier material contains on one side a layer (not shown) made of a pressure-sensitive adhesive, which has been applied according to the method described in DT-OS 2 005 917.

Weft yarns 20 are preferably natural cotton yarns, although many alternatives are possible. The warp yarns consist of three separate variants: Elastic warp yarns 22 (preferably 140 denier Avril Corespun made by Stretch Yarns, Inc., Fall River, Mass. placed on the market v / erden), 60/2 cotton yarns 24 and 70/2, 17 filament nylon superloft yarns The remaining yarns 22 lie afloat over a number of weft yarns.

Both; The fabric according to FIG. 1 is the nylon yarns 26 (with the exception of those which, in addition to the elastic yarns 22 are woven in pairs, with opposing weave patterns and separated by cotton yarns 24. This arrangement binds the nylon yarn firmly in the carrier material, so that the number of accessible loose nylon thread ends is substantially reduced that touch the overlying woven fabric when the tape is wound into a roll will.

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The carrier material described in DT-OS 2 005 917 The ribbon contained 70/2, 34 filament nylon superloft yarns in the warp or 70/4, 34 filament nylon super loft yarn. So each of these yarns had filaments of nearly 2 denier. In the case of the tape according to the invention, the number of filaments in the nylon yarns is reduced, while the strength of the filaments is increased to two and a half to five and a half deniers. This stuff therefore contains fewer fine nylon filaments that could be pulled out of the fabric and in contact with an overlying adhesive layer, if the tape is wound into a roll. However, it has been found that the practical The upper limit of the strength of the filaments is around five and a half denier, since every further increase in the strength of the Filament makes the nylon yarn too harsh to be acceptable for the manufacture and use of the tape.

In the fabric shown in Fig. 2, the nylon yarns are woven according to the same weave pattern and alternate with the Cotton yarns 24 off.

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Claims (5)

Claims 1. Adhesive tape, consisting of a woven backing with a pressure-sensitive adhesive on one side is applied and the elastic warp yarns interspersed with inelastic nylon warp yarns are and are floating on one side of the carrier over a large number of weft yarns, characterized in that that the elastic warp yarns (22) containing elastomeric filaments are stretched in the carrier and the filaments of the inelastic multifilament nylon warp yarn (26) have a denier between two and a half and five and a half denier. 2. Adhesive tape according to claim 1, characterized in that the nylon warp yarns (26) 70/2, 17 filament yarns are. 3. Adhesive tape according to claim 1 or 2, characterized in that each nylon warp yarn (26) in addition to not more than an inelastic warp yarn (24), which consists of a c kidney material as Nylor, and that the adjacent Nylon warp yarns (26) are interwoven with opposing weave patterns. 4. Adhesive tape according to claim 3, characterized in that the inelastic consisting of a material other than nylon Warp yarns (24) are cotton yarns. 5. Adhesive tape according to one of the preceding claims, marked daduch that the warp yarns over the woven Carriers are distributed such that an elastic warp yarn (22) with elastomeric filaments every seventh Warp yarn forms up to every thirteenth warp yarn. 609812/08 7 3