DE102008021739A1 - Adhesive band for wrapping up of cables, comprises a textile carrier and an adhesive mass, which is uniformly coated from melt, is made of adhesive resin and ethylene polymer and consists of primary and secondary antioxidant - Google Patents

Abstract

The adhesive band comprises a textile carrier and an adhesive mass uniformly coated over melt. The adhesive mass is made of adhesive resin, and ethylene polymer with a density of 0.86-0.87 g/cm 3>, a crystallite melting point of 115[deg] C, a melt index of less than 1.5g/10 min, and a bending module of less than 17 MPa, and/or consists of 1-octene. The adhesive mass consists of a primary antioxidant in a quantity of 6 phr and a secondary antioxidant in a quantity of 0.5-1 phr. The primary antioxidant consists of sterically inhibited phenolic group. The adhesive band comprises a textile carrier and an adhesive mass uniformly coated over melt. The adhesive mass is made of adhesive resin, and ethylene polymer with a density of 0.86-0.87 g/cm 3>, a crystallite melting point of 115[deg] C, a melt index of less than 1.5g/10 min, and a bending module of less than 17 MPa, and/or consists of 1-octene. The adhesive mass consists of a primary antioxidant in a quantity of 6 phr and a secondary antioxidant in a quantity of 0.5-1 phr. The primary antioxidant consists of sterically inhibited phenolic group and/or a relative molar mass of greater than 500 Dalton and the secondary antioxidant consists of class of sulfur compound or phosphite and/or a relative molar mass of greater than 500 Dalton. The adhesive resin has a polydispersity of 1.0-1.4. The adhesive mass with 50-70 g/m 2>is subjected on the textile carrier. The quantity of adhesive resin in the adhesive mass is 200-240 phr. A homogenized mixture of adhesive resin and plasticizer has a mixture melting point of 45-95[deg] C. The adhesive mass consists of a copolymer or terpolymer of ethylene and butene-(1), hexene-(1) or octene-(1). The bending module of the copolymer or terpolymer lies under 10 MPa and the crystalline melting point lies under 50[deg] C or the adhesive mass consists of ethylene-propylene monomer or ethylene propylene diene monomer with an ethylene content of 40-70 wt.% and/or a density of 0.87 g/cm 3>. The quantity of the copolymer or terpolymer is 100 phr. The adhesive tape is compatible with strand isolation based on polyvinyl chloride and polyolefine for 3000 hours at 125[deg] C. The textile carrier is a non-woven, which is hardened through a process with needles, which is carried out by overstitching with separate threads or by meshing.

Description

The The invention relates to an adhesive tape and the use thereof for the bandaging of wire harnesses in the automotive sector.

electrical and electromechanical components and the sheaths of electrical cables are often made of polymeric materials, where polyvinyl chloride (PVC) is a historical and due its availability as well as its excellent material properties represents important plastic. In particular, sheaths exist of copper wires, mainly of PVC compounds, if not Framework conditions such as high temperature requirements or halogen-free Force alternatives.

For The mechanical and electrical protection of such cables are in the past self-adhesive tapes have been developed which are generally used for protection and insulation as well as for Bandaging of electrical cables and components in considerable Scope are used. The self-adhesive tapes allow to create a long-term composite without being affected by interactions between tape and cable sheath damage occur on the cable. These consist predominantly today made of a soft PVC film and a rubber adhesive. For special applications, for example in temperature class T3 (see below) or in the case of damping requirements become adhesive tapes with a textile carrier, for example a polyester or cellulosic tissue used.

in the Framework of discussion on environmental sustainability PVC tends to replace this material with alternatives to replace. Electrical construction and auxiliary parts as well as the sheathing of copper wires are reinforced with others Plastic designed for higher Requirements fluoropolymers, thermoplastic polyesters, polyurethanes, Polyphenylene oxide and cross-linked polyethylene are used. For the cost-sensitive mass range with lower temperature requirements find reinforced materials based on polypropylene use.

Also for cable harnesses in vehicles is the trend towards such PVC-free lines given while components such as connectors, switches, Rillrohre etc. already predominantly Made of PVC-free materials. The following will be for the tests the terms wire insulation, Sheath, cable, harness and cables used synonymously.

Electric wiring harnesses or components wrapped with self-adhesive tapes must ensure safe operation over the entire service life of the complete product, such as that of a vehicle. Choosing unsuitable tapes can result in incompatibilities during the life of the product, resulting in cable damage or extreme embrittlement. Corrosion and short circuits with the risk of failure of the entire electrical / electronics are possible consequences. Especially in vehicles such as passenger cars or trucks are placed on the compatibility very high standards; peak temperatures of up to 80 ° C can occur in the passenger compartment, and far higher temperatures in the engine compartment. Therefore, a long-term test has over 3000 hours for the application of cable wrapping tapes, as in the Automotive Testing Directive LV 312 (January 2006 issue, Section 5.5) described, enforced as a standard test. This describes the compatibility test in detail:
Sample cable sets are stored at test temperatures and, after specified periods of time, usually every 500 hours, are bent around a mandrel of defined diameter and then examined for damage. This test runs for a total duration of 3000 hours. The test temperatures are based on the temperature classes of the cable sets and range from 90 ° C to 150 ° C, depending on the field of application of the wiring harness in the passenger or engine compartment. The LV 312 standard provides that for an adhesive tape for the temperature range T2 after 3,000 hours at 105 ° C a compatibility between adhesive tape and wire insulation must be ensured. Since in this temperature range in Europe mainly cables with PVC sheath are used, the test must be carried out with tape on such cables. In the next higher temperature class T3, the tests mainly use wires with polypropylene and radiation cross-linked polyethylene (XPE) insulation. The test temperature is then 125 instead of 105 ° C. In addition to the in LV 312 In principle, the same test can be performed on lines that meet other international standards, such as those specified for reference SAE J1128-TXL - or the SAE J1128 TWP standard in the USA.

According to the test method LV 312 Pattern cable sets are manufactured as described below. Two identical cores with a cross section of 0.35 mm ² are twisted with a lay length of approx. 2 cm. The cable bundles are screwed with the tape to be tested (width 19 mm) with about 50% overlap wound in a cup. As cables, PVC cables (manufacturer's designation: Gebauer & Griller 67218 or Cordplast 46443) are used at a test temperature of 105 ° C. At a test temperature of 125 ° C, PP cables from Tyco (manufacturer: AGP 0219) and XPE cables from Acome (manufacturer: T4104F) or Draka (manufacturer: 971130) are used.

The Tape-wrapped cable sets from appropriate Reference lines plus an unwound blank sample be for the duration of 3000 h at 105 ° C respectively 125 ° C suspended in a natural oven Aeration stored. Every 500 h each becomes a candidate taken. The cable set will last at least 3 hours, but not more than 48 h conditioned at test climate and then checked as follows.

One Wiring section is about a mandrel with the diameter 20 mm and visually inspected. Thereafter, the examinee removed from the tape and twisted. The wrapping tape must initially without obvious damage to the Leadership can be replaced. Subsequently the single cores are tested. A single vein will be at least twice tightly around a mandrel with the diameter 2 mm, the other around wrapped a mandrel with the diameter of 10 mm, visually inspected and each carried out a voltage test.

If for tests of the individual wires around a 2 mm mandrel the wire insulation have no cracks, breaks or embrittlement and not swelled or shrunk, the tape applies as compatible with the wire insulation. A discoloration the line is allowed. But the original color has to be still be recognizable.

Known for such cable winding applications are tapes with a band-shaped carrier made of soft PVC film or textiles on fabric or Nähvliesbasis. Ribbons with a Nähvliesträger be, for example, in the DE 94 01 037 U1 described. As an adhesive coating, pressure-sensitive pressure-sensitive adhesive coatings are preferably used. So far, textile adhesives based on natural rubber and styrene block copolymers have been used on textile substrates. These adhesives based on natural rubber almost always demonstrate weaknesses in the compatibility test LV 312 , on both PVC and polyolefin cable sheaths. Since natural rubber adhesives are processed from solution, this technology is not forward-looking. Adhesives based on unsaturated styrene block copolymers, which can also be processed from the melt without solvent, achieve compatibility with the temperature range T2 only on a few types of cables with PVC wire insulation (3000 hours test at 105 ° C., whereby the cables used also The range of damage occurring ranges from slight cracking in the cable sheathing due to embrittlement to complete failure due to crumbling of components and wire sheaths after storage For temperature class T3 (3000 hours test at 125 ° C) Although there are no good pressure-sensitive adhesives, acrylates are thermally stable but solvent-containing or not coatable as a dispersion on textile substrates, an on-market Acrylathotmelt is very expensive and loses its sticking when stored under T2 and T3 conditions by post-crosslinking.

task The invention is to remedy this situation and a textile tape in particular for use as bandaging tape for cable harnesses to provide.

The Task is solved by an adhesive tape as in the main claim is laid down. Advantageous developments of the subject invention as well as uses of the adhesive tape can be found in the subclaims.

Accordingly, the invention an adhesive tape of a textile support and an adhesive composition of an ethylene polymer coated thereon and an adhesive resin instead of natural rubber or unsaturated Styrene block copolymers and tackifier resin.

Ethylene polymers were not suitable for the person skilled in the art for high-quality PSAs. Nevertheless, surprisingly, from ethylene polymers having a density between 0.86 and 0.89 g / cm ³ , preferably between 0.86 and 0.88 g / cm ³ , particularly preferably between 0.86 and 0.87 g / cm ³ , and a crystallite melting point of at least 105 ° C, preferably at least 115 ° C PSAs are prepared with high bond strength, tack and shear strength, which are particularly suitable for the coating of textile adhesive tape carriers.

An adhesive tape made of a textile carrier and of the pressure-sensitive adhesive of the invention has gegenü On analog adhesive tapes based on natural rubber or unsaturated styrene block copolymers not only advantages in the cable compatibility, but also in the compatibility with corrugated pipes made of polypropylene and polyamide, as are common in wire harnesses in the automotive industry.

The The ethylene polymer according to the invention preferably has a melt index of less than 6 g / 10 min, more preferred less than 1.5 g / 10 min. The flexural modulus of the ethylene polymer is preferably less than 26 MPa, more preferably less than 17 MPa.

The ethylene polymer preferably contains a C ₃ to C ₁₀ olefin, in particular 1-octene, as comonomer. The ethylene polymer preferably has a structure of crystalline polyethylene blocks and substantially amorphous blocks of ethylene and a C ₃ to C ₁₀ olefin.

The density of the ethylene polymer is decreasing ISO 1183 determined and expressed in g / cm ³ . The melt index is decreasing ISO 1133 tested at 190 ° C and 2.16 kg and expressed in g / 10 min. The crystallite melting point (T _cr ) is detected by DSC at a heating rate of 10 ° C / min after ISO 3146 determined. The flexural modulus (flexural modulus) is after ASTM D 790 (Secant modulus at 2% strain).

Classical On the one hand, textile adhesive tapes tend to deform during storage (Formation of noses and voids) and on the other hand go up cold flow of adhesive the unwinding forces on and on until the unrolling becomes too heavy for the user or the adhesive even breaks up during unwinding. Therefore, another is surprising Advantage of the adhesive tape of the invention the storage stability the adhesive tape rolls according to the invention. Even after one month of storage at 70 ° C, the subject invention is still good developable.

In addition, the calls Standard LV 312 in that the pressure-sensitive adhesive layer after heat-storage should still have pressure-sensitive tackiness similar to the compatibility test. Adhesive tapes based on natural rubber or unsaturated styrene block copolymers completely lose their adhesiveness after only 500 to 1500 hours. Apparently, in textile carriers, the oxygen passage is so high that the adhesive is strongly oxidized. In the case of hydrogenated styrenic block copolymers, which are not only too expensive for such applications, but also have substantially low bond strengths, the bond strength is also almost completely reduced. The reason for this is mainly that these adhesives melt at test temperature and the melt is absorbed by the textile support, so that the pressure-sensitive adhesive is essentially no longer on the surface. This effect is also observed in the unsaturated styrenic block copolymers. Surprisingly, the adhesive according to the invention penetrates only slightly into the textile support at 105 ° C. and remains well tacky in the event of the use of suitable anti-aging agents, even with still very good adhesive data.

The The ethylene polymer of the present invention can be used with the Rubber compounds known elastomers such as natural rubber or synthetic rubbers be combined. Preferably, unsaturated elastomers such as natural rubber, SBR, NBR or unsaturated styrenic block copolymers only in small amounts or particularly preferably not used at all. In the main chain saturated synthetic rubbers such as polyisobutylene, Butyl rubber, EPM, HNBR, EPDM or hydrogenated styrenic block copolymers be in the case of a desired modification prefers.

It surprisingly, it turned out that stickiness (Tack) and adhesion in the new polyethylene-based adhesive in contrast to conventional rubber compositions of polydispersity of the resin are extremely dependent. The polydispersity is the ratio of weight average to number average molecular weight distribution and can be determined by gel permeation chromatography. When Adhesive resins are therefore those having a polydispersity of less than 2.1, preferably less than 1.8, more preferably less used as 1.6. The highest tack is with resins to achieve a polydispersity of 1.0 to 1.4.

When Adhesive resin has been found to be resins based on rosin (for example gum rosin) or rosin derivatives (for example disproportionated, dimerized or esterified rosin), preferably partially or fully hydrogenated, well suited are. They show the highest tack of all adhesive resins (Stickiness, aptitude). Probably that is at the low polydispersity of 1.0 to 1.2. Terpene phenolic resins are also suitable lead, but only moderately Tack, but very good shear strength and aging resistance.

Preference is likewise given to hydrocarbon resins, which presumably are well ver due to their polarity are tolerable. These are, for example, aromatic resins such as cumarone-indene resins or styrene-based or α-methylstyrene or cycloaliphatic hydrocarbon resins from the polymerization of C ₅ monomers such as piperylene or C ₅ or C ₉ fractions of crackers or terpenes such as β -one or δ-limonene or combinations thereof, preferably partially or completely hydrogenated, and hydrocarbon resins obtained by hydrogenation of aromatic-containing hydrocarbon resins or cyclopentadiene polymers.

The Amount of adhesive resin is preferably 130 to 350 phr, more preferably 200 to 240 phr (phr means parts by weight based on 100 parts by weight of rubber, that is here Ethylene polymer).

The adhesive preferably comprises a liquid plasticizer such as aliphatic (paraffinic or branched), cycloaliphatic (naphthenic) and aromatic mineral oils, esters of phthalic, trimellitic, citric or adipic acid, wool waxes, liquid rubbers (for example low molecular weight nitrile, butadiene) or polyisoprene rubbers), liquid polymers of isobutene homopolymer and / or isobutene-butene copolymer, liquid and soft resins having a melting point below 40 ° C. based on the raw materials of tackifier resins, in particular the classes of tackifier resins listed above. Particular preference is given to liquid polymers of isobutene and / or butene and esters of phthalic, trimellitic, citric or adipic acid, in particular their esters of branched octanols and nonanols. Mineral oils are very good at tackifying the ethylene polymer but are too volatile to have good fogging values (US Pat. DIN 75201 ), for example> 60.

Classic PVC adhesive tapes with DOP as a plasticizer have a fogging value of 30 to 35, the subject of the invention should be as far as possible superior to a PVC adhesive tape. Moreover, adhesives having trimellitate (TOTM) or liquid polyisobutylene (for example Oppanol ^® B 10) after 3000 hours of storage at 125 ° C significantly stickier than when using a mineral oil. For these reasons, the adhesive is therefore preferably substantially free of mineral oils.

Instead of a liquid plasticizer, it is also possible to use a very soft and hardly crystalline ethylene polymer. This is preferably a copolymer of ethylene and butene (1), hexene (1) or octene (1), for example under the trade names Exact ^®, Engage ^{®, ®} or Vistamaxx Tafmer ^® known, or a terpolymer of ethylene, Propylene and butene (1), hexene (1) or octene (1), wherein the flexural modulus is preferably below 10 MPa and the crystallite melting point preferably below 50 ° C. Further preferred ethylene polymers are oil-free EPM or EPDM, ie copolymers or terpolymers of ethylene and propylene and optionally a diene, such as ethylidenenorbornene, preferably having an ethylene content of 40 to 70% by weight, a Mooney viscosity (conditions 1 + 4, 125 ° C) below 50 and / or a density below 0.88 g / cm ³ , more preferably below 0.87 g / cm ³ . Although such ethylene polymers are very soft - compared to a liquid plasticizer - the amount should be very high in relation to the ethylene polymer of the invention, well above 100 phr.

The melting point of the adhesive resin (determination according to DIN ISO 4625 ) is also important. The bond strength of a rubber compound (based on natural or synthetic rubber) usually increases with the melting point of the adhesive resin. In the case of the ethylene polymer according to the invention, this seems to be reversed. Adhesive resins with a high melting point of 105 ° C to 140 ° C) are significantly less favorable than those having a melting point below 90 ° C, which are preferred according to the invention.

resins with a melting point of below 85 ° C are little in the trade Available as the flakes or lozenges at transportation and storage. Therefore, according to the invention is preferably a common adhesive resin (for example, with a melting point from the range 85 ° C to 105 ° C) with a plasticizer combined to actually lower the resin melting point. The mixed melting point is based on a homogenized mixture of adhesive resin and plasticizer determined, with the two components in the same ratio present as in the adhesive. It is preferably in the area from 45 ° C to 95 ° C.

conventional Adhesives based on natural rubber or unsaturated Styrene block copolymers as the elastomer component usually contain a phenolic antioxidant to prevent oxidative degradation this elastomeric component with double bonds in the polymer chain. The adhesive of the invention contains however, an ethylene polymer without oxidation-sensitive double bonds and should therefore be without antioxidant. Surprisingly It has been shown that antioxidants are the compatibility of Improve adhesive with the wire insulation.

Therefore, according to the invention preferably a primary antioxidant, and more preferably also a secondary antioxidant, is used. The adhesives of the invention contain in the preferred Embodiments at least 2 phr, more preferably 6 phr primary antioxidant, or preferably at least 2 phr especially at least 6 phr of a combination of primary and secondary antioxidant, wherein the primary and secondary antioxidant function need not be present in different molecules, but may also be combined in one molecule.

at These amounts are optional stabilizers such as metal deactivators or sunscreen not included. The amount of secondary Antioxidant is preferably up to 5 phr, more preferably 0.5 to 1 phr. Surprisingly, it was found that a combination of primary antioxidants (for example sterically hindered Phenols or C radical scavengers such as CAS 181314-48-7) and secondary antioxidants (for example sulfur compounds, Phosphites or sterically hindered amines) improved compatibility results. First of all, the combination of a primary Antioxidant, preferably sterically hindered phenols with a relative molecular weight greater than 500 daltons, with a secondary Antioxidant from the class of sulfur compounds or from the Class of phosphites preferably having a relative molecular weight of more than 500 daltons preferred, the phenolic, the sulfur-containing and the phosphitic functions are not present in three different molecules but also more than one function in a molecule can be united.

to Optimization of the properties may be the self-adhesive used with other additives such as fillers, flame retardants, Pigments, UV absorbers, antiozonants, metal deactivators Flame, photoinitiators, crosslinkers or crosslinking promoters be mixed. Suitable fillers and pigments are For example, carbon black, titanium dioxide, calcium carbonate, zinc carbonate, Zinc oxide, silicates or silica.

The Production and processing of the PSAs can be made from solution as well as from the melt. Preferred manufacturing and processing methods take place from the melt. For the latter case include suitable manufacturing processes both batch and continuous Method. Particularly preferred is the continuous production the PSA with the aid of an extruder and subsequent coating directly on the substrate to be coated at a correspondingly high Temperature of the adhesive. As coating methods are extrusion coating preferred with slot dies and calender coating.

The application rate (coating thickness) is preferably between 30 and 120 g / m ² , more preferably between 50 and 70 g / m ² .

The bond strengths are reduced by a deduction angle of 180 ° AFERA 4001 determined on 15 mm wide test strips. In the process, steel plates will be used as a test substrate Standard AFERA or the back of the tape used.

As carrier material, it is possible to use all known textile carriers such as a loop fabric, a velor, a scrim, a woven fabric, a knitted fabric, in particular a PET filament fabric or a polyamide fabric, or a nonwoven, wherein under "nonwoven" at least textile fabrics according to FIG EN 29092 (1988) as well as stitchbonded nonwovens and similar systems are to be understood.

Also can use spacer fabric and knitted fabric with lamination become. Spacer fabrics are mat-shaped laminates with a cover layer of a fiber or filament nonwoven, a Backing layer and individual layers existing between these layers or tufts of retaining fibers that extend across the surface of the laminated body distributed through the particle layer are and the top layer and the backing layer with each other connect. The holding fibers needled through the particle layer Keep the topcoat and undercoat at a distance from each other and they are with the topcoat and the undercoat connected.

When Nonwovens are particularly solid staple fiber webs, however also filament, meltblown and spun nonwovens in question, the most in addition to solidify. As possible hardening methods are for nonwovens the mechanical, the thermal as well as the chemical hardening known. Be used for mechanical consolidation the fibers mostly by turbulence of the individual fibers, by meshing fiber bundles or by sewing additional ones Threads held together purely mechanically, so can be through thermal as well as by chemical methods adhesive (with binder) or cohesive (binder-free) fiber-fiber bonds achieve. These can be achieved with suitable formulation and process control exclusively or at least predominantly Restrict fiber nodes so that preserving the loose, open structure in the fleece nevertheless a stable, three-dimensional Network is formed.

Especially Advantageously, nonwovens have been found, in particular by oversewing solidified with separate threads or by meshing are.

such solidified nonwovens are, for example, on stitchbonding machines of the type "Malivlies" the company Karl Mayer, formerly Malimo, manufactured and are among others at the companies Naue fiber technology and Techtex GmbH available. A Malivlies is characterized that a cross-fiber fleece by the formation of meshes of fibers of the nonwoven is solidified.

When Carrier can still be a fleece of the type Kunitvlies or Multiknitvlies be used. A Kunitvlies is characterized that it comes from the processing of a longitudinally oriented fiber fleece to a fabric that appears on one side Mesh and on the other mesh webs or pile fiber pleats, but neither threads nor prefabricated fabrics has. Such a nonwoven, for example, on stitchbonding machines of the type "Kunitvlies" of the company Karl Mayer already produced for a long time. Another distinctive Feature of this web is that it is used as a longitudinal fiber fleece in Longitudinal high tensile forces can absorb. One Multiknitvlies is characterized compared to the Kunitvlies characterized that the fleece by both sides piercing with needles both on the top and on the bottom undergoes a solidification.

After all Sewing fleeces are also suitable as a precursor, an adhesive tape to build. A sewing fleece is made of a nonwoven material with formed a plurality of mutually parallel seams. These seams are created by sewing or Sewing of continuous textile threads. For this type of fleece are stitching machines of the type "Maliwatt" Company Karl Mayer, formerly Malimo, known.

Then the Caliweb ^{® is} perfectly suitable. The Caliweb ^® consists of a thermally fixed non-woven Multiknit with two outer mesh layers and an inner pile layer, which are arranged perpendicular to the mesh layers.

Farther Particularly advantageous is a staple fiber fleece, which in the first step is preconsolidated by mechanical processing or that is a wet fleece which has been hydrodynamically placed, wherein between 2 wt .-% and 50% by weight of the fibers of the nonwoven are melt fibers, in particular between 5% and 40% by weight of the fibers of the web. Such a thing Fleece is characterized in that the fibers are wet or, for example, a staple fiber nonwoven through the formation of stitches from fibers of the fleece or by needling, sewing or Air and / or water jet machining is preconsolidated. In one second step is heat setting, with the strength of the nonwoven by the melting or melting of the melt fibers again is increased.

The Solidification of the fleece carrier can also be without binder, for example by hot stamping with reach structured rolls, whereby over pressure, temperature, Residence time and the embossing geometry properties such as strength, Thickness, density, flexibility u. Ä. Are controlled can.

When Starting materials for the textile carrier are in particular polyester, polypropylene, viscose or cotton fibers intended. However, the present invention is not limited to those mentioned Materials limited, but it can, for the expert recognizably without being inventive to have a variety of other fibers for production of the fleece are used. In particular, wear-resistant Polymers such as polyesters, polyolefins, polyamides or glass or carbon fibers find use.

When Carrier material is also suitable for a carrier a laminate in which at least the adhesive layer bearing layer a textile layer is. On this layer can one or further layers of any material may be applied for example, paper (creped and / or uncreped), film (for example, polyethylene, Polypropylene, mono- or biaxially oriented polypropylene films, Polyester, PA, PVC and other films), web-shaped foams (For example, polyethylene and polyurethane) and the mentioned Textiles.

On the coating side (coating side) can be the surfaces the carrier be pretreated chemically or physically, as well as the reverse side of an anti-adhesive be subjected to physical treatment or coating.

The adhesive tape is formed by applying the adhesive to the textile support over a partial area or over the whole area, preferably on one side or optionally on both sides. The coating may also take the form of one or more strips in the longitudinal direction (machine direction), optionally in the transverse direction, but it is especially full surface. Furthermore, the adhesives can be applied in the form of dot dots by screen printing, wherein the dots of adhesive can also be differently sized and / or differently distributed, by gravure printing in longitudinal and transverse directions, by screen printing or by flexographic printing. The adhesive may be in dome form (made by screen printing) or in another pattern such as mesh, stripes, zigzag lines. Furthermore, it can also be sprayed on, for example, which results in a more or less irregular application pattern.

Of the general term "adhesive tape" includes the meaning this invention all planar structures as in two dimensions extended films or film sections, tapes with extended Length and limited width, band sections, die cuts, Labels and the like.

The adhesive tape according to the invention is for bundling, Protecting, marking, insulating or sealing ventilation pipes or wires or cables and for sheathing cable harnesses suitable in vehicles or field coils for picture tubes.

The Adhesive tape is characterized by being with wire insulation PVC-based and polyolefin-based compatible, in particular up to 3000 hours at 105 ° C or even at 125 ° C. In one case, it even managed to be tolerable on cross-linked PE under T4 conditions (3000 hours at 150 ° C) to reach.

In the following, the invention is explained in more detail by some examples without wishing to restrict the invention. Raw materials of the examples: IN FUSE 9107: Copolymer of ethylene and octene (1), melt index 1 g / 10 min, Density 0.866 g / cm ³ , flexural modulus 15.5 MPa, Crystallite melting point 121 ° C IN FUSE 9507: Copolymer of ethylene and octene (1), melt index 5 g / 10 min, Density 0.866 g / cm ³ , flexural modulus 13.9 MPa, Crystalline melting point 119 ° C LD 251: LDPE, melt index 8 g / 10 min, density 0.9155 g / cm ³ , Flexural modulus 180 MPa, crystallite melting point 104 ° C Engage 7467: Copolymer of ethylene and butene (1), melt index 1.2 g / 10 min, Density 0.862 g / cm ³ , flexural modulus 4 MPa, Crystalline melting point 34 ° C Ondina 933: White oil (paraffinic-naphthenic mineral oil) TOTM: Tris (2-ethylhexyl) trimellitate Oppanol B 10: liquid poly-iso-butene PB 0300 M: Polybutene, melt index 4 g / 10 min, density 0.915 g / cm ³ , Flexural modulus 450 MPa, crystallite melting point 116 ° C Escorez 1310: Unhydrogenated C ₅ hydrocarbon resin with a melting point of 94 ° C and a polydispersity of 1.5 Eastotac C 130 L: fully hydrogenated C ₅ hydrocarbon resin (as opposed to Eastotac H 130 R as a non-fully hydrogenated resin with a Polydispersity of 2.1) with a melting point of 130 ° C and a polydispersity of 2.0 Eastotac C 115 L: fully hydrogenated C ₅ hydrocarbon resin with a melting point of 115 ° C and a polydispersity of 1.9 Escorez 1102: Unhydrogenated C ₅ hydrocarbon resin with a melting point of 100 ° C and a polydispersity of 2.6 Escorez 5400: fully hydrogenated cyclopentadiene resin having a melting point of 103 ° C and a polydispersity of 2.3 Regalite 1100: hydrogenated aromatic hydrocarbon resin having a Melting point of 100 ° C and a polydispersity of 1.6 Foral 85: fully hydrogenated glycerol ester of rosin with a Melting point of 85 ° C and a polydispersity of 1.2 Irganox 1726: Phenolic antioxidant with sulfur-based function of a secondary antioxidant Irganox 1076: phenolic antioxidant Irganox PS 802: Sulfur-based secondary antioxidant

example 1

The adhesive consists of the following components: 100 phr IN FUSE 9107 78.4 phr Ondina 933 212 phr Escorez 1310 8 phr Irganox 1726

The mixed melting point of resin and plasticizer is 54 ° C. The adhesive is produced continuously in an extruder and applied at 70 g / m ² to a polyester fabric by means of die coating from the melt. The filament fabric has a basis weight of 130 g / m ² of polyester yarn of 167 dtex with 45 threads per cm in the warp direction and 25 threads per cm in the weft direction. The coated bale is made by cutting in rolls in 19 mm width and 10 m run length, the core inner diameter is 38 mm.
Adhesion to steel 6.6 N / cm
Adhesive force on the backside 3.1 N / cm
Roller storage 1 month at 70 ° C: The roller is slightly deformed and easy to unroll.
Impact test: The finished tape is according to LV 312 (For details on bushing and test wires see section "State of the art") wound around wire pair with different insulation materials and stored at appropriate temperature. Six such specimens are made per insulation material. Every 500 hours one of the samples is checked, the tape is unwound again and the cable is wrapped around a mandrel of 10 mm diameter and one of 2 mm diameter. It is examined whether the insulation is damaged and whether the adhesive exhibits a sticking tack. Test temperatures: PVC 105 ° C and on cross-linked PE at 125 ° C. After 3000 hours, all wire insulation is still undamaged. After 3000 hours at 105 ° C, the mass has hardly penetrated into the carrier and still has a good pressure tack. After 3000 hours at 125 ° C, the mass partially penetrated into the carrier but is still tacky.
Fogging value: 36

Example 2

Adhesive composition as in Example 1 but with Eastotac C 130 L instead of Escorez 1310 and 5 phr Irganox 1076 and 3 phr Irganox PS 802 instead of 8 phr Irganox 1726, coating as in Example 1 but with 60 g / m ² on the following carrier: Malivlies with a Basis weight of 150 g / m ² consisting of polyester fibers of a fineness of 3.3 dtex and a fiber length of 60 to 80 mm and 5 wt .-% of a thermally activated fine binder powder (VINNEX TM LL 2321). The mixed melting point of resin and plasticizer is 90 ° C.
Adhesion to steel 4.3 N / cm,
Adhesive force on the back 1.3 N / cm.
Roller storage 1 month at 70 ° C: The roller is slightly deformed and easy to unroll.
Compatibility test on PVC at 105 ° C and on cross-linked PE and PP at 125 ° C:
After 3000 hours, all wire insulation is still undamaged. After 3000 hours at 105 ° C, the mass has hardly penetrated into the carrier and still has a good pressure tack. After 3000 hours at 125 ° C, the mass partially penetrated into the carrier but is still tacky.

Example 3

Adhesive composition as in Example 1, but with Eastotac C 115 L instead of Escorez 1310, coating as in Example 1 at 68 g / m ² on the following support: Maliwatt-Nähgewirke polyester fibers with about 3.4 dtex and a fiber length of about 80 mm , a basis weight of 72 g / m ² and a fineness F 22 with a stitch length of 1 mm of a polyester yarn of 50 dtex. The mixed melting point of resin and plasticizer is 75 ° C
Adhesion to steel 4.2 N / cm,
Adhesive force on the back 1.6 N / cm.
Roller storage 1 month at 70 ° C: The roller is slightly deformed and easy to unroll.
Compatibility test on PVC at 105 ° C and on cross-linked PE and PP at 125 ° C:
After 3000 hours, all wire insulation is still undamaged. After 3000 hours at 105 ° C, the mass has hardly penetrated into the carrier and still has a good pressure tack. After 3000 hours at 125 ° C, the mass partially penetrated into the carrier but is still tacky.

Example 4

Adhesive composition as in Example 1 but with Escorez 1102 instead of Escorez 1310, coating as in Example 1 with 70 g / m ² on the following support: Malivlies fleece made of polypropylene with a basis weight of 80 g / m ² and a fineness F 18. The Mischschmelzpunkt of resin and plasticizer is 60 ° C.
Adhesive force to steel 0.8 N / cm, adhesion to back side 0.2 N / cm.
After 4 weeks of storage at room temperature, the mass is no longer tacky.
Roller storage 1 month at 70 ° C: The roller is slightly deformed and easy to unroll.
Compatibility test on PVC, cross-linked PE and PP at 105 ° C:
After 3000 hours at 105 ° C all wire insulation is still undamaged. After 3000 hours at 105 ° C, the mass has hardly penetrated into the carrier and still has a good pressure tack. After 3000 hours at 125 ° C, the nonwoven backing has decayed by embrittlement, therefore no further tests can be made.

Example 5

The preparation is carried out as in Example 1, the adhesive consists of the following components: 100 phr IN FUSE 9107 100 phr Engage 7467 425 phr Escorez 1310 16 phr Irganox 1726 Adhesive force on steel 5 N / cm, adhesion to back 2.5 N / cm.
Roller storage 1 month at 70 ° C: The roller is slightly deformed and easy to unroll.
Compatibility test: Test temperatures: PVC 105 ° C and on cross-linked PE at 125 and 150 ° C. After 3000 hours, all wire insulation is still undamaged. After 3000 hours at 105 ° C, the mass has hardly penetrated into the carrier and still has a good pressure tack. After 3000 hours at 125 ° C, the mass partially penetrated into the carrier but is still tacky.
Fogging value: 85.

Example 6

The preparation is carried out as in Example 1, the adhesive consists of the following components: 100 phr IN FUSE 9507 250 phr Regalite 1100 140 phr Oppanol B 10 8 phr Irganox 1726

The mixed melting point of resin and plasticizer is 67 ° C. Coating is carried out at 70 g / m ² on a support as in Example 3.
Adhesive force on steel 8.9 N / cm, adhesion to backside 2.0 N / cm.
Compatibility test: Test temperatures: PVC 105 ° C and on cross-linked PE at 125 and 150 ° C. After 3000 hours, all wire insulation is still undamaged. After 3000 hours at 105 ° C, the mass still has a good pressure-sensitive tack. After 3000 hours at 125 ° C, the mass is still slightly sticky. After 3000 hours at 150 ° C, the mass is significantly reduced but the wire insulation is still undamaged. Fogging value: 91.

Example 7

The preparation is carried out as in Example 1, the adhesive consists of the following components: 100 phr IN FUSE 9107 212 phr Foral 85 40 phr TOTM 8 phr Irganox 1726

The mixed melting point of resin and plasticizer is 67 T. Coating is carried out with 70 g / m ² on a carrier as in Example 3.
Adhesive force on steel 8.9 N / cm, adhesion to backside 2.0 N / cm.
Compatibility test: Test temperatures: PVC 105 ° C and on cross-linked PE at 125 and 150 ° C. After 3000 hours, all wire insulation is still undamaged. After 3000 hours at 105 ° C, the mass still has a good pressure-sensitive tack. After 3000 hours at 125 ° C, the mass is still slightly sticky. After 3000 hours at 150 ° C, the mass is significantly reduced but the wire insulation is still undamaged.

Comparative Example 1

The execution is carried out as described in Example 1, but the mass according to market recipes from 100 phr Vector 4113 97 phr Escorez 1310 21 phr Ondina 933 1 phr Irganox 1726 Roller storage 1 month at 70 ° C: The roller is severely deformed and very difficult to unroll.
Impact test: The PVC insulation shows the first cracks after 500 hours and the PE and PP insulation after 1000 hours storage at 105 ° C. The stickiness is lost after 1000 hours, the mass has been absorbed by the wearer and there laked.

Comparative Example 2

The Execution is carried out as described in Example 1, however with LD 251 instead of IN FUSE 9107. The coating is not sticky but hard with oily surface.

Comparative Example 3

The Execution is carried out as described in Example 1, however with Engage 7467 instead of IN FUSE 9107. The coating is very soft and sticky like a flypaper. The mass is due the low melt viscosity in the carrier penetrated. The coated bale could not be cut into rolls be, because when unrolling the mass splits. An adhesion measurement is also not possible for this reason (cohesive failure).

Comparative Example 4

The execution takes place as in example, the adhesive consists of the following components: 100 phr IN FUSE 9107, 78.4 phr PB 0300 M, 212 phr Escorez 5400, 8 phr Irganox 1076.

The Mass is barely tacky

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 9401037 U1 [0011]

Cited non-patent literature

• - Automotive Testing Directive LV 312 (January 2006 edition, section 5.5) [0006]
• - LV 312 standard [0006]
• - LV 312 [0006]
• SAE J1128-TXL [0006]
• - SAE J1128 TWP standard [0006]
• - LV 312 [0007]
• - LV 312 [0011]
• - ISO 1183 [0019]
• - ISO 1133 [0019]
• - ISO 3146 [0019]
• ASTM D 790 [0019]
• - standard LV 312 [0021]
• - DIN 75201 [0027]
• - DIN ISO 4625 [0030]
• AFERA 4001 [0038]
• - AFERA standard [0038]
• - EN 29092 (1988) [0039]
• LV 312 [0058]

Claims (16)

Adhesive tape, in particular for wrapping cables consisting of a textile support and an adhesive thereon, coated on at least one side from the melt, of an ethylene polymer having a density between 0.86 and 0.89 g / cm ³ and a crystallite melting point of at least 105 ° C. and an adhesive resin , Adhesive tape according to claim 1, characterized in that the density of the ethylene polymer is between 0.86 and 0.88 g / cm ³ , preferably between 0.86 and 0.87 g / cm ³ , and / or the ethylene polymer has a crystallite melting point of at least 115 ° C. Adhesive tape according to claim 1 or 2, characterized in that the ethylene polymer has a melt index of less than 6 g / 10 min, preferably less than 1.5 g / 10 min, has a flexural modulus of less than 26 MPa, preferably less than 17 MPa and / or a C ₃ - to C ₁₀ -olefin, preferably 1-octene. Adhesive tape according to at least one of the preceding claims, thereby marked that contains the adhesive - one primary antioxidant, preferably in an amount of at least 2 phr, more preferably at least 6 phr and - one secondary antioxidant in an amount of 0 to 5 phr, preferably in an amount of 0.5 to 1 phr. Adhesive tape according to Claim 4, characterized that the primary antioxidant is a sterically hindered phenolic Group and / or a relative molecular weight of more than 500 daltons having. Adhesive tape according to Claim 4 or 5, characterized that the secondary antioxidant from the class of sulfur compounds or the class of phosphites is derived and / or a relative molecular weight of more than 500 daltons. Adhesive tape according to at least one of the preceding claims, characterized in that the adhesive resin has a polydispersity of less than 2.1, preferably less than 1.8 is particularly preferred less than 1.6, in particular between 1.0 and 1.4. Adhesive tape according to at least one of the preceding claims, characterized in that the adhesive is applied to the textile support at 30 and 120 g / m ² , preferably at 50 and 70 g / m ² . Adhesive tape according to at least one of the preceding claims, characterized in that the adhesive resin is a hydrocarbon, preferably selected from the group - the resins based on rosin or Kolophoniumderivaten preferably partially or fully hydrogenated, - the hydrocarbon resins based on C ₅ monomers, preferably partially or completely hydrogenated, - the hydrocarbon resins from hydrogenation of aromatic hydrocarbon resins, - the hydrocarbon resins based on hydrogenated cyclopentadiene polymers, and / or - the resins based on polyterpenes, preferably partially or fully hydrogenated, wherein the amount of adhesive resin in the adhesive preferably 130 to 350 phr, more preferably 200 to 240 phr. Adhesive tape according to at least one of the preceding claims, characterized in that the adhesive contains a plasticizer, preferably no mineral oil, but selected from the group of liquid polymers of isobutene homopolymer and / or isobutene-butene copolymer and the ester of phthalic, trimellitic, Lemon or adipic acid, in particular their esters of branched octanols and nonanols. Adhesive tape according to at least one of the preceding claims, characterized in that when not using a plasticizer the adhesive resin has a melting point of below 90 ° C or a homogenized mixture of adhesive resin and plasticizer a mixed melting point in the range of 45 and 95 ° C. Adhesive tape according to at least one of the preceding claims, characterized in that the adhesive comprises a copolymer of ethylene and butene (1), hexene (1) or octene (1) or a terpolymer of ethylene, propylene and butene (1), Hexene (1) or octene (1), wherein the flexural modulus of the copolymer or terpolymer is preferably below 10 MPa and the crystallite melting point preferably below 50 ° C, or contains an EPM or EPDM, preferably having an ethylene content of 40 to 70 wt % and / or a density below 0.88 g / cm ³ , more preferably below 0.87 g / cm ³ , the amount of copolymer or terpolymer preferably being above 100 phr. Adhesive tape according to at least one of the preceding claims, characterized in that the adhesive tape with wire insulation PVC-based and polyolefin-based for 3000 hours at 105 ° C, preferably also at 125 ° C compatible is. Adhesive tape according to at least one of the preceding claims, characterized in that the textile carrier polyester fibers preferably of polyethylene terephthalate. Adhesive tape according to at least one of the preceding claims, characterized in that the textile carrier is a nonwoven which is preferably solidified by a process with needles This is especially preferred by over stitching with separate threads or by meshing done. Use of an adhesive tape after at least one of the preceding claims for bundling, shooting, Marking, insulating or sealing ventilation pipes or wires or cables and for sheathing cable harnesses in vehicles or field coils for picture tubes