JP2010047758A - Adhesive tape having carrier material coated with adhesive to one or both sides for insulating and winding wire or cable, and use thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adhesive tape having a carrier material based on PVC and allowing quick and easy bundling of cables without causing problems, concretely flagging and oozing, of a conventional technology. <P>SOLUTION: The adhesive tape is used for winding and bundling a long object, in particular, such as conductors and a set of cables with a web type carrier material wherein at least one face is coated with a pressure-sensitive adhesive particularly. The carrier material is formed of an embossed PVC film having emboss depth of 0.01-8 μm, preferably having emboss depth of 0.1-3 μm. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an adhesive tape, in particular an adhesive tape for the insulation and winding of wires or cables, having a carrier material coated with an adhesive on one or both sides, and in particular as an insulating tape in vehicles such as automobiles. It relates to the use of wires and cables for wrapping and bundling.

  Insulating and cable winding tapes usually consist of a plasticized PVC film with an adhesive applied on one side. This type of adhesive tape based on a flexible PVC film is also used in automobiles for the purpose of focusing electric wires for cable harnesses. Originally developed as an insulation tape, this adhesive tape was originally focused on improving electrical insulation, but now it has additional functions, such as focusing many individual cables and making them permanent. The cable must be fixed to provide a more stable set of cables or to protect the cable against the effects of mechanical, thermal and chemical environments.

  Such cable harnesses are still mostly wound by hand. Exactly when a conventional soft film adhesive tape is cut manually, it can easily lead to excessive stretching of the carrier film and a corrugated tearing edge, which makes secure bonding difficult.

  After excessive stretching, it shrinks and returns, but this can lead to peeling of the bonded ends (this phenomenon is known to those skilled in the art as “flagging”). Flagging generally means that the tape end of the roll tends to peel off. The cause arises from the combination of the adhesive strength of the adhesive, the rigidity of the carrier and the rigidity of the diameter of the cable assembly.

  Flagging can be caused not only by immature use of film cable tape, but also by special cable harness designs. In this connection, it has been found that the end of the cable tape, particularly in the immediate vicinity of where the diameter of the cable harness changes, tends to peel off. This problem has been avoided in various ways by cable harness manufacturers. For example, in each case, there is a conventional technique of terminating the winding on a member having a larger diameter. In addition, attempts have been made to fix the end of the adhesive tape particularly strongly with additional high pressure. However, all of these solutions require additional costs when winding the cable harness, which should be avoided if possible.

  Therefore, usually, in order to avoid flagging, the adhesive tape is required to have a high adhesive force to the back side thereof. This high adhesion is often accompanied by a generally soft adhesive, which on the other hand leads to bleeding of the adhesive from the roll surface. This stickiness of the side edges is also referred to as oozing by those skilled in the art.

  To meet the new demands for environmental protection, there has been a tendency to avoid solvents in adhesive tape products for several years. In particular, in the automotive industry, there is a strong demand that the products used do not volatilize solvents (known to those skilled in the art as VOCs (volatile organic compounds)).

  With soft PVC films, the application of hot melt adhesives is technically difficult and costly, so manufacturers have solved the above problems with water based adhesives.

  However, this water-based adhesive usually has a lower adhesive strength in combination with a plasticized PVC film than a solvent-based system. Indeed, this drawback can be avoided by proper formulation in some adhesive systems, but it is cost-effective to make it possible to use adhesives with lower adhesion without causing flagging. It is worth doing.

  From German Offenlegungsschrift 102 02 038 A1 (Patent Document 1), an adhesive tape for insulating and winding a wire or cable comprising a carrier material coated with an adhesive on one or both sides is disclosed. Are known. Here, the carrier material consists of a web-like, preferably stretched PVC film having a thickness of up to 40 μm, preferably 20-40 μm, and is substantially free of plasticizer. The PVC film can be embossed, wherein the embossing depth is preferably 10-30 μm and / or the embossing consists of a pattern with continuous or intermittent lines extending in the longitudinal or lateral direction.

German Patent Application Publication No. 102 02 038 A1

PVC Formulating, Hrsg. E.J.Wickson, J. Wiley & Sons, 1993 PVC: Production, Properties and Uses, G. Mattews, The Institute of Materials, 1996 “Plastics Additives Handbook” (5. Ed.) Hanser Verlag “Handbook of PVC Formulating” John Wiley & Sons Verlag “Kunststoff-Handbuch-Polyvinylchlorid 2/1” (2.) Hanser Verlag, Chapter 6 Kunststoff-Handbuch, Carl-Hanser-Verlag, Volume II, Polyvinylchlorid, Part 1, 240-243 “Handbook of Pressure Sensitive Adhesive Technology”, D. Satas, (3rd edition)

  The object of the present invention is to provide an adhesive tape comprising a carrier material based on PVC, which makes it possible to bundle the cables quickly and easily without the disadvantages of the prior art—specifically flagging and leaching. It is to be.

  Said subject is solved by the adhesive tape as described in a main claim. In this context, the subject matter of the subclaims is an advantageous development of the adhesive tape as well as the preferred use of the adhesive tape according to the invention.

  That is, the present invention relates to an adhesive tape comprising a web-like carrier material coated with a specific pressure-sensitive adhesive on at least one side, particularly for wrapping long articles, for example, a wrapping of a conductor or an assembled cable. Wherein the carrier material comprises an embossed PVC film having an embossing depth of 0.01 μm to 8 μm, preferably 0.1 μm to 3 μm.

  The emboss depth, which is the difference between the thickness calculated from the unit area weight and the thickness measured by a thickness gauge (Dickentaster) (the measurement method necessary for measuring the emboss depth is described below) is 0.01 μm to In this case, the embossing pattern is basically not more important than that. Preference is given to embossed films having continuous or intermittent lines extending in the longitudinal or transverse direction.

  The shape and depth of the embossing has a positive effect on the flexibility of the film as the cable is wound. The embossing of the fill also has a positive effect on the nesting phenomenon (Teleskopieren). This is because air confined between the film and the adhesive is preferentially squeezed out under stress loading. In addition, thereby, a smaller unwinding force can also be achieved. This is advantageous in the case of conventional processing of adhesive tapes by hand.

  Adhesive strength of the adhesive to its backside is not a significant influence factor in avoiding flagging (the measurement methods required to measure flagging are described below), but rather the direct relationship between embossing depth and flagging behavior is It is a surprising finding for those skilled in the art that it can occur independently of the adhesive force. Furthermore, it is surprising that this effect can be demonstrated in various film formulations in combination with all possible adhesive formulations.

   In a first advantageous embodiment of the invention, the carrier material consists of a PVC film having a thickness of 40 μm to 350 μm, preferably 70 μm to 150 μm.

Adhesive tapes according to the present invention can be prepared using conventional monomeric plasticizers such as dioctyl phthalate (DOP, di (2-ethylhexyl) phthalate), diisononyl phthalate (DINP), diisodecyl phthalate (DIDP), tris (2-ethylhexyl) trimellitate (TOTM). ) In the range of 5-60 phr, or typical polymeric plasticizers such as adipic acid, sebacic acid, azelaic acid or phthalic acid and diols such as butane-1,3-diol, propane 1,2-diol, butane-1,4-diol, using a film comprising a range of 10~70phr and polyester _{(M r} approximately 1,800 to 13,000) consisting of hexane-1,6-diol and others Can be produced in the same manner. Also equivalent including typical phosphate plasticizers such as diphenyl cresyl phosphate (DPCF), diphenyl octyl phosphate (DPOF, (2-ethylhexyl) -diphenyl phosphate) and / or tris (2-ethylhexyl) phosphate (TOF) The film can also be manufactured. Also possible are mixtures of one or more plasticizers selected from these types.

  The K value of the PVC powder can be varied within a wide range as well. For example, the use of emulsified or suspended PVC powder in the range of 40-90K has no associated effect on improving flagging behavior.

  However, because of the high thermal stability, PVC having a high K value, for example emulsified PVC having a K value of 78, is preferred. Such materials and their processing are described, for example, in the following handbooks: PVC Formulating, Hrsg. EJ Wickson, J. Wiley & Sons, 1993 (non-patent document 1) or PVC: Production, Properties and Uses, G. Mattews, The Institute. of Materials, 1996 (Non-Patent Document 2). The K value of the film can therefore preferably be 60-90, in particular 75-80.

  Also, all other additives to the PVC film, such as stabilizers such as “Plastics Additives Handbook” (5. Ed.) Hanser Verlag (Non-Patent Document 3) or “Handbook of PVC Formulating” John Wiley & Sons Verlag ( Stabilizers such as those described in Non-Patent Document 4) can also be added to the adhesive tape of the present invention without affecting the flagging behavior.

  The addition of stabilizers such as diphenylthiourea is desirable to avoid thermal degradation (eg, weakening) of the PVC film during processing and during use as an adhesive tape. In one preferred embodiment of the invention, the film contains a stabilizer. In particular, stabilizers based on tin compounds, preferably such stabilizers approved for food packaging films, such as dibutyltin-bis (2-ethylhexyl mercaptoacetate), are suitable for the adhesive tape of the invention. The use of stabilizers containing lead or cadmium is possible as well, but these are less preferred from a toxicity and environmental point of view. The content of the stabilizer is, for example, 0.3 to 10 parts by weight per 100 parts by weight of the PVC polymer, and in order to achieve high heat resistance, at least 0.7 phr (parts by weight based on 100 parts by weight of PVC), preferably At least 1 phr.

  Furthermore, conventional additives for PVC films such as fillers, pigments, impact modifiers, lubricants and / or processing aids (for example, Paraloid K 120 ND, Rohm & Haas) are added to the carrier film of the adhesive tape of the invention. Can be used in the manufacture of Conventional additives are described in “Kunststoff-Handbuch-Polyvinylchlorid 2/1” (2.) Hanser Verlag, Chapter 6 (Non-Patent Document 5). As a preferred lubricant, montanic acid ester wax is used, and an amount of 2 to 5 parts by weight per 100 parts by weight of the PVC polymer is advantageous.

  The production of the carrier film is preferably carried out with a calendar in a high-temperature or low-temperature method, in particular stretching. At this time, the film is stretched several times on the roller section at a temperature exceeding 95 ° C. while increasing the speed of the roller, and the thickness thereof is reduced accordingly. Furthermore, the film can also be stretched slightly in the width direction (KOBRA® process). The Luvitherm® process is particularly suitable for the adhesive tape of the present invention. This is because in this case, even a high K value can be processed without any problem. This Luvitherm (registered trademark) process is described, for example, in Kunststoff-Handbuch, Carl-Hanser-Verlag, Volume II, Polyvinylchlorid, Part 1, pages 240-243 (Non-patent Document 6). This consists of two steps: in the first stage the polyvinyl chloride is calendered at a relatively low temperature (ie pressed with a roller into a film) and in the second stage it has poor mechanical strength. The film is sintered by treating it briefly on a roller at a higher temperature. Rigid PVC can also be processed into a thin film by a blow process, but this method is suitable for smaller K values.

  This PVC carrier material is coated with an adhesive on at least one side. Pressure sensitive adhesives include all conventional types such as adhesives based on aqueous polyacrylates, polyisoprene and / or polyisobutylene, generally based on elastic rubbers or acrylates. Such an elastic rubber can be, for example, a homopolymer or copolymer of isobutylene, 1-butene, vinyl acetate, acrylate ester, butadiene or isoprene, wherein a formulation based on acrylate ester, butadiene or isoprene is used. Of particular importance.

  Typical adhesive materials based on acrylates can be polymerized from alkyl acrylates and / or methacrylates having 4 to 17 carbon atoms. Mechanical properties and tackiness can be improved as desired by polymerizing and introducing appropriate comonomers (some having additional functional groups such as carboxy or hydroxy groups).

  All of these adhesive types can be applied from solution, as dispersions or as hot melts. The choice of coating method has no significant effect on the flagging behavior. However, it is preferable to use an aqueous agent system.

Suitable adhesives can be applied in the range of 10-50 g / m ² , in particular 15-30 g / m ² . In this case, the adhesive force to the back side can be in the range of 0.2 to 3 N / cm, preferably 0.5 to 1.5 N / cm, without any obvious effect on the flagging behavior.

For the optimization of properties, the self-adhesive adhesive used is one or more additives such as tackifiers (resins), plasticizers, fillers, pigments, UV absorbers, photoprotective agents, fire protection It can be mixed with an agent, an antioxidant, a photoinitiator, a crosslinking agent or a crosslinking accelerator. Tackifiers are based on raw materials such as, for example, hydrocarbon resins (eg, polymers based on unsaturated C ₅ or C ₉ monomers), terpene phenol resins, eg, α- or β-pinene, to name only a few examples. Polyterpene resins, aromatic resins such as coumarone-indene resins or resins based on styrene or α-methylstyrene, and rosin and its secondary products, such as rosin disproportionation, dimerization or esterification products, For example, reaction products with glycol, glycerin or pentaerythritol. Preferably, resins that do not have easily oxidizable double bonds, such as terpene phenol resins, aromatic resins, particularly preferably resins prepared by hydrogenation, such as hydrogenated aromatic resins, hydrogenated polycyclopentadiene resins, Hydrogenated rosin derivatives or hydrogenated polyterpene resins are used.

  Suitable fillers and pigments are, for example, carbon black, titanium dioxide, calcium carbonate, zinc carbonate, zinc oxide, silicate or silica. Suitable miscible plasticizers include, for example, aliphatic, cycloaliphatic and aromatic mineral oils, di- or polyesters of phthalic acid, trimellitic acid or adipic acid, liquid elastic rubber (eg nitrile rubber or polyisoprene rubber), butene and Liquid polymers comprising isobutene, acrylic esters, polyvinyl ethers, liquid or soft resins based on raw materials for adhesive resins, wool waxes and other waxes or liquid silicones. Crosslinking agents are, for example, isocyanates, phenolic or halogenated phenolic resins, melamine- and formaldehyde resins. Suitable crosslinking promoters are, for example, maleimides, allyl esters, such as triallyl cyanurate, polyfunctional esters of acrylic or methacrylic acid. Anti-aging agents are, for example, sterically hindered phenols, especially those known under the trade name of Irganox.

  Crosslinking is advantageous because it increases the holding power, thereby reducing the tendency of the roll to deform (nesting or forming voids (also referred to as gaps)) during storage. Non-adhesive roll side edges and adhesive squeezing (exudation) appearing as non-sticky edges of the adhesive tape spirally wound on the cable are also reduced. Holding power is determined by the composition of the adhesive material and the plasticizer content of the film, which is preferably greater than 150 minutes.

  The adhesive can be applied in the longitudinal direction of the adhesive tape in the form of stripes having a narrower width than the carrier of the adhesive tape. Depending on the application, multiple parallel stripes of adhesive can also be applied onto the carrier material. The position of the stripe on the carrier can be freely selected. In this case, it is preferable to directly place an adhesive on one of the edges of the carrier. Preferably, the adhesive is applied to the entire surface of the carrier.

  On the adhesive coat layer of the carrier, there can be provided at least one cover stripe extending in the longitudinal direction of the adhesive tape and covering 20% to 90% of the adhesive coat layer.

  In one preferred embodiment of the invention, exactly one cover stripe is present on the adhesive coat layer.

  The position of the stripe on the adhesive coat layer can be freely selected. In this case, it is preferable that the stripe is directly disposed on one of the longitudinal edges of the carrier. In this way, an adhesive stripe is obtained which extends in the longitudinal direction of the adhesive tape and is isolated from the other longitudinal edge of the carrier. When the adhesive tape is used for the exterior of the cable harness by guiding the adhesive tape around the cable harness by spiral movement, the covering of the cable harness is such that the adhesive of the adhesive tape is only on the adhesive tape itself. Adhesion, on the other hand, can be carried out in such a way that the encapsulation is not in contact with the adhesive. The cable harness thus sheathed has a very high flexibility because the cable is not fixed at all by an adhesive. Thereby, its flexibility during mounting (even when mounting in very narrow passages or sharp turns) is obviously increased.

  If secure fixing of the adhesive tape to the envelop is desired, it can be packaged so that part of the adhesive stripe is adhered to the adhesive tape itself and the other part is adhered to the envelop.

  In another advantageous embodiment, said stripe is arranged in the middle of the adhesive coat layer so that two adhesive stripes extending in the longitudinal direction of the adhesive tape are produced at the longitudinal edge of the carrier.

  In order to reliably and economically place the adhesive tape around the cable harness in the aforementioned spiral motion state, and to prevent the resulting protective covering from slipping, each is present on the longitudinal edge of the adhesive tape Two adhesive stripes are advantageous. This is particularly true when the first stripe, which is narrower than the second stripe in most cases, serves as a fixing aid and the second wider stripe serves as a fastening portion. In this way, the adhesive tape is affixed to the cable so that the assembled cable is guaranteed against slippage and is still flexible.

  In addition, there is an embodiment in which two or more cover stripes are provided on the adhesive coat layer. Even when only referring to a single stripe, one of ordinary skill in the art can thus read that multiple stripes can simultaneously cover the adhesive coat layer.

  Preferably, the stripe generally covers 50% to 80% of the adhesive coat layer. The degree of coverage is selected according to the application and the diameter of the assembled cable. The percentage value is a value based on the width of the cover stripe with respect to the width of the carrier.

  Particularly preferably, one or two adhesive stripes are left which have a total width of 20-50% of the carrier width.

  Covering materials, in particular films customary for cable bundling applications, ie films based on polyolefins (eg polyethylene films, polypropylene films, uniaxial or biaxially oriented polypropylene films, polyester films, PA films and other films) Or mention may be made of films based on PVC, preferred are those of these types having a plasticizer content of 20-60 phr.

  A primer layer may be used between the carrier film and the adhesive to improve the adhesion of the adhesive on the film, thereby avoiding the adhesive moving to the back of the film while unrolling the roll. It is advantageous. For a description of adhesives commonly used in adhesive tapes, as well as release coating agents (Trennlack) and primers, see, for example, “Handbook of Pressure Sensitive Adhesive Technology”, D. Satas, (3rd edition) (Non-Patent Document 7). Are listed.

  As the primer, those of known dispersion type and solvent type can be used, for example, those based on isoprene- or butadiene-containing elastic rubber, cyclized rubber, particularly nitrile rubber. Isocyanates as additives improve adhesion and improve the shear strength of the adhesive after Eindiffusion.

  In some cases, the back surface of the carrier can be provided with a coating for adjusting the unwinding force.

  The release effect can be achieved by coating a known release agent (optionally mixed with other polymers). Examples include stearyl compounds (eg polyvinyl stearyl carbamate, transition metals such as stearyl compounds of Cr or Zr), ureas consisting of polyethyleneimine and stearyl isocyanate, polysiloxanes (eg copolymers with polyurethanes or graft copolymers to polyolefins) As a thermoplastic fluoropolymer. The term stearyl is described as a synonym for all linear or branched alkyl or alkenyl having at least 10 carbon atoms, such as octadecyl.

  In order to achieve good hand cutting properties, a rough cut end face is generated during the production of the adhesive tape roll. This forms a tear under microscopic observation, which aids tear propagation. This is possible in particular by the use of a push-cut (Quetschschnitt) with a dull or predetermined serrated rotary blade, or by a cut-off (Abstechschnitt) with a dull fixed blade. Due to the low thickness and low tendency to face, a roll tape length of 33-100 m is possible without problems. On the other hand, conventional products usually have a relatively short length of 10 to 33 m.

  The adhesive tape of the present invention is preferably colored, especially black. The coloring may be done with a film, with an adhesive layer and / or with a primer layer, or may be printed on the film before, during or after application of the adhesive.

The base film and carrier of the adhesive tape can generally contain a flame retardant. As such flame retardants, halogen-free materials can be used, for example fillers such as carbonates and hydroxides of aluminum, calcium or magnesium; and borates; and stannates; based on nitrogen Flame retardants such as melamine cyanurate, dicyandiamide; red phosphorus; organic or inorganic phosphates or polyphosphates; or a class of sterically hindered amines such as HA (L) S. If the demand is very high, bromine-containing flame retardants such as hexabromocyclododecane, polydibromostyrene or preferably bis (pentabromophenyl) ethane can be used. Decabromodiphenyl oxide and also antimony trioxide (Sb ₂ O ₃ ) can be used.

  Due to the above advantageous properties, the adhesive tape can be used in particular for the insulation and winding of wires or cables. Furthermore, the adhesive tape is advantageously suitable for the exterior of elongate articles, for example, in particular assembled cables for automobiles. In this case, the adhesive tape can be guided around the long article as a spiral line, or the long article can be covered with the tape in the axial direction.

  Furthermore, the adhesive tape preferably stores the cable and adhesive tape assembly according to LV312, January 2006 edition, Chapter 5.5 at a temperature above 100 ° C. for a period of up to 3000 hours, and then the cable. Is bent around a mandrel so that it does not break when it is applied to a PVC sheathed cable or a polyolefin sheathed cable.

  FIG. 1 shows a cross section of a cable harness composed of a bundle of individual cables (7) and armored with the adhesive tape of the present invention. This adhesive tape is guided around the cable harness in a spiral motion. The cross-sectional view of the illustrated cable harness has two turns I and II of the adhesive tape. Although not shown in the figure, further winding continues toward the left side. A cover stripe (5) is present on the adhesive coat layer (4), resulting in an adhesive stripe (6) extending in the longitudinal direction of the tape. The non-adhesive areas (11, 21, 23) of the adhesive tape and the adhesive areas (12, 22, 24) are alternately present. (Sections 22 and 24 are not visible from the outside, unlike the exposed adhesive 12, so denser hatching was chosen for illustration). The exterior of the cable harness is performed so that the adhesive stripe (6) is completely affixed to the adhesive tape. Adhesion with the cable (7) is eliminated.

The general term “adhesive tape” means in the sense of the present invention all flat structures, for example a two-dimensionally spread film or film piece, a tape having a spread length and a limited width, a tape piece, Includes die-cut products, labels, and the like.
Test method Measurement is carried out in a test atmosphere of 23 ± 1 ° C. and 50 ± 5% relative humidity.

  Conventional methods for measuring flagging behavior on a laboratory scale are described in various automobile manufacturer standards. The standard method here is the creation of test specimens consisting of 5 to 25 individual cables having one or various diameters. The material of the cable sheath follows the temperature grade of the adhesive tape to be tested in each case. The adhesive tape to be tested is then wound around the cable so that each winding overlaps 50%. The specimen thus obtained is then exposed to various temperature and environmental influences and then bent around an 80 mm diameter mandrel. Next, in particular, flagging is also evaluated. This flagging test is not very accurate, and many adhesive tapes that pass without defects in this test show flagging in the field of actual use.

Therefore, a new type of test has been developed to adjust the situation during the production of the cable harness. For this purpose, 13 individual cables of conventional quality of 0.85 mm ² are equipped with 10 grooved tubes of length 10 cm and diameter 10 mm over a length of about 2 m. They are then wound with the adhesive tape to be tested so that the individual windings overlap each other by 50%. The winding is terminated approximately 5 cm away from the end of the fluted tube, and the adhesive tape is teared by hand so that each half is affixed to its backside and cable bundle. The specimen thus obtained is then spirally wound and fixed around a 1.5 m long mandrel with a diameter of 80 cm. After 24 hours at room temperature, the specimen is removed and the flagging behavior at the end of the adhesive tape is evaluated. This is evaluated as flagging when the adhesive tape ends are separated by more than 1 mm.

The embossing depth is given by the difference in thickness before and after the embossing process. This can be evaluated from the already embossed pattern as follows. First, the theoretical thickness is calculated from the unit area weight (determined according to DIN 53352) and density (PVC = 1.37 g / m ³ ). This theoretical thickness is then subtracted from the true thickness measured using a flat gauge according to DIN 53370. The result corresponds to the approximate depth of embossing.

  The K value of PVC is measured according to DIN 53726 / ISO 1628-2.

The molecular weight measurement of the molecular weight _{M r} was performed by gel permeation chromatography (GPC). As eluent, THF (tetrahydrofuran) containing 0.1% by volume of trifluoroacetic acid was used. The measurement was performed at 25 ° C. As a preliminary column, PSS-SDV (5 μm, 10 ³ mm, inner diameter 8.0 mm × 50 mm) was used. For separation, PSS-SDV column groups (5 μ, 10 ³ and 10 ⁵ and 10 ⁶ , inner diameter 8.0 mm × 300 mm, respectively) were used. The sample concentration was 4 g / l and the flow rate was 1.0 ml per minute. This was measured against a PMMA standard.

  Hereinafter, the present invention will be described in more detail based on a plurality of examples, but there is no intention to limit the present invention in any way with this.

上記例のフィルムにおいては、軟質ＰＶＣの処方はいずれも変化させず、単にエンボス深さだけを変化させた。接着テープ１〜３には、アクリレート分散液に基づく同じ接着剤を使用した。接着テープ３が、接着テープ１と比べてそれの裏側への接着力がかなりより小さいにもかかわらず、全くフラッギングを示さないことは当業者には驚くべき事実である。この挙動は、明らかに、本発明で特定されるフィルムのエンボス深さの使用に起因し得るものである。 Example 1
Adhesive tape based on acrylate adhesive Adhesive tape 1:
The following composition (value based on 100 phr polymer): 50 phr polymer plasticizer 10 phr filler (chalk)
1 phr carbon black 1 phr A flexible PVC film with a unit area weight of 100 g / m ² and an embossing depth of 15 μm with a stabilizer is added to an acrylate-based aqueous adhesive (an aqueous acrylate dispersion of Rohm and Haas, named Primal PS83D (solid Material content 53 wt%; ammonia content <0.2 wt%; pH value 9.1-9.8))) 25 g / m ² .
Adhesive tape 2:
The above soft PVC film having a unit area weight of 100 g / m ² having an emboss depth of 1 μm was coated with 25 g / m ² of the above acrylate-based aqueous adhesive.
Adhesive tape 3:
The soft PVC film with a unit area weight of 100 g / m ² having an emboss depth of 1 μm was coated with 15 g / m ² of the above acrylate-based aqueous adhesive.

In the film of the above example, the soft PVC formulation was not changed, but only the emboss depth was changed. The same adhesive based on the acrylate dispersion was used for adhesive tapes 1-3. It is surprising to those skilled in the art that the adhesive tape 3 does not show any flagging even though the adhesive force on its back side is considerably less than that of the adhesive tape 1. This behavior can clearly be attributed to the use of the embossing depth of the film specified in the present invention.

Example 2
Adhesive tape based on elastic rubber dispersion Adhesive tape 4:
The above soft PVC film with a unit area weight of 140 g / m ² having an emboss depth of 15 μm was coated with 25 g / m ² of an aqueous rubber-based adhesive having the following composition.

上記の例のフィルムでは、ここでも、軟質ＰＶＣフィルムの処方は変化させず、単にエンボス深さだけ変化させた。接着テープ４〜６には、弾性ゴム分散液に基づく同じ接着剤を使用した。この場合もまた、接着テープ６は、接着テープ４と比べてかなりより小さい裏側に対する接着力にもかかわらず、フラッギングは示さないという驚くべき事実が確認される。この挙動は、明らかに、本発明によるフィルムのエンボス深さの使用に起因し得るものである。 80 wt% (dry substance) natural rubber 45 wt% (dry substance) Resin (C ₅ resin)
1% by weight (dry matter) Anti-aging agent 4% by weight (dry matter) Plasticizer adhesive tape 5:
The soft PVC film having a unit area weight of 140 g / m ² having an emboss depth of 1 μm was coated with 25 g / m ² of an aqueous adhesive based on the elastic rubber.
Adhesive tape 6:
The soft PVC film having a unit area weight of 140 g / m ² having an emboss depth of 1 μm was coated with 15 g / m ² of an aqueous adhesive based on the elastic rubber.

In the film of the above example, the prescription of the flexible PVC film was not changed here, but only the embossing depth was changed. The same adhesive based on the elastic rubber dispersion was used for the adhesive tapes 4-6. Again, the surprising fact is confirmed that the adhesive tape 6 does not exhibit flagging, despite the much lower adhesion to the back side compared to the adhesive tape 4. This behavior can clearly be attributed to the use of the embossing depth of the film according to the invention.

  Furthermore, when comparing the results of the adhesive tape 3 and the adhesive tape 4 that show no flagging with an adhesive force of only 0.5 N / cm on the back side, the high adhesive force on the back side has a higher meaning for the result without flagging. It can be clearly inferred that there is not.

FIG. 1 shows a cross section of a cable harness composed of a bundle of individual cables (7) and armored with the inventive adhesive tape.

Claims (15)

  Adhesive tape, in particular, an adhesive tape for wrapping a long article such as a lead wire or a cable assembly with a web-shaped carrier material coated with a pressure-sensitive adhesive on at least one side, wherein the carrier material is Said adhesive tape, characterized in that it consists of an embossed PVC film having an embossing depth of 0.01 μm to 8 μm, preferably 0.1 μm to 3 μm.   2. Adhesive tape according to claim 1, characterized in that the PVC film has a thickness of 40 [mu] m to 350 [mu] m, preferably 70 [mu] m to 150 [mu] m.   The adhesive tape according to claim 1 or 2, wherein a plasticizer, a stabilizer, a filler, a pigment, an impact resistance improver, a lubricant and / or a processing aid are added to the PVC film.   4. The adhesive tape according to claim 1, wherein the adhesive is a self-adhesive adhesive based on aqueous polyacrylate, polyisoprene and / or polyisobutylene. 5. The adhesive tape according to claim 1, wherein the adhesive is applied in the range of 10 to 50 g / m < ² >, in particular 15 to 30 g / m < ² >.   6. The adhesive tape according to claim 1, wherein the adhesive is applied in the form of stripes narrower than the carrier film of the adhesive tape in the longitudinal direction of the adhesive tape.   The adhesive tape according to claim 1, wherein the adhesive tape has a rough cut end surface.   8. The adhesive tape according to claim 1, wherein the adhesive tape is self-extinguishing, colored and / or black.   The adhesive strength of the adhesive is in the range of 0.2 to 3 N / cm, preferably 0.5 to 1.5 N / cm, with respect to the back side of the adhesive tape. 8. At least one adhesive tape of 8.   The adhesive tape according to claim 1, wherein a primer is present between the PVC film and the adhesive.   Use of at least one adhesive tape according to claim 1 for the insulation and winding of wires or cables. Use of at least one adhesive tape according to claims 1 to 11, particularly for the covering of long articles such as braided cables in motor vehicles.   Use of at least one adhesive tape according to claims 1 to 12, wherein the adhesive tape is guided around the elongate article as a spiral line. Use of at least one adhesive tape according to claims 1-13, which envelops a long article with tape in the axial direction. When the adhesive tape is applied on the cable having the PVC sheath and on the cable having the polyolefin sheath, the assembly comprising the cable and the adhesive tape is made according to LV312, January 2006, Chapter 5.5, 100. Use of at least one adhesive tape according to claims 1 to 14, which is stored at a temperature in excess of 0 C for a period of up to 3000 hours and then does not break when the cable is bent around a mandrel.

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