EP2235126A1 - Film support, notamment pour bande adhésive et utilisation correspondante - Google Patents

Film support, notamment pour bande adhésive et utilisation correspondante

Info

Publication number
EP2235126A1
EP2235126A1 EP09703455A EP09703455A EP2235126A1 EP 2235126 A1 EP2235126 A1 EP 2235126A1 EP 09703455 A EP09703455 A EP 09703455A EP 09703455 A EP09703455 A EP 09703455A EP 2235126 A1 EP2235126 A1 EP 2235126A1
Authority
EP
European Patent Office
Prior art keywords
carrier film
layer
film
film according
polypropylene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09703455A
Other languages
German (de)
English (en)
Inventor
Bernhard MÜSSIG
Uwe Michel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tesa SE
Original Assignee
Tesa SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tesa SE filed Critical Tesa SE
Publication of EP2235126A1 publication Critical patent/EP2235126A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/241—Polyolefin, e.g.rubber
    • C09J7/243—Ethylene or propylene polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2483/00—Presence of polysiloxane
    • C09J2483/005—Presence of polysiloxane in the release coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2839—Web or sheet containing structurally defined element or component and having an adhesive outermost layer with release or antistick coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31573—Next to addition polymer of ethylenically unsaturated monomer
    • Y10T428/31587—Hydrocarbon polymer [polyethylene, polybutadiene, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31652—Of asbestos
    • Y10T428/31663—As siloxane, silicone or silane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31909—Next to second addition polymer from unsaturated monomers
    • Y10T428/31913—Monoolefin polymer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31938—Polymer of monoethylenically unsaturated hydrocarbon

Definitions

  • Carrier film in particular for an adhesive tape and use thereof
  • the invention relates to a monoaxially stretched carrier film with a layer of polypropylene homopolymer on which a release layer is applied.
  • a carrier film is a mechanically stable layer for an adhesive tape in roll form or in the form of a label and usually consists of a PVC film, a biaxially stretched polyester or polypropylene film or, rarely, a monoaxially or non-stretched polypropylene film.
  • Films with high longitudinal strength are usually achieved by stretching extruded film webs of semi-crystalline thermoplastics. This is predominantly a biaxial stretching. In exceptional cases, the films are oriented to further increase the longitudinal tensile strength only in the longitudinal direction. Both commercially available biaxially oriented and monoaxially stretched films based on polypropylene have, however, in contrast to unstretched films from the blown or cast process low tear propagation resistance in the transverse direction. In practice, this leads in the case of injured edges of film or tape (due to blunt blades when cutting or later unintentional injury to the cut edge) easily tearing or tearing of the film or the tape produced therefrom under tensile load.
  • films or adhesive tapes with filaments or nets are made of filaments of glass or plastic reinforced.
  • the production of such Filamentklebeb is very complex on the system side and thus expensive and prone to failure.
  • the filaments and laminating adhesive or an additional pressure-sensitive adhesive coating
  • Further disadvantages of such filament adhesive tapes are low kink resistance, high thickness, unclean cutting edges and lack of weldability and recyclability.
  • the production of such an adhesive tape is described, for example, in US Pat. No. 4,454,192 A1.
  • DE 21 04 817 A1 describes a method for producing a tape carrier of polyolefin (polyethylene or polypropylene). By stretching in the longitudinal direction, a tensile strength in the longitudinal direction of 320 N / mm 2 should be achieved (according to claim 2, no example available). Stretching ratio and stress at 10% elongation are not disclosed.
  • EP 0 255 866 A1 is a longitudinally or biaxially oriented polypropylene film.
  • the addition of elastomeric components increases the impact resistance in the transverse direction.
  • This measure leads to a deterioration of the tensile strength and the tear propagation resistance in the transverse direction.
  • the stretching ratio in the longitudinal direction is 1: 5.5 to 1: 7.
  • Tensile strengths of 12 to 355 N / mm 2 are achieved. Data on the stresses at 10% strain are not made.
  • Beiersdorf (Hamburg) sold a tear strip with a reduced tear tendency. This contained an in
  • the tough coextrusion outer layer reduces, on the principle of impact modifiers, the formation of microcracks when cutting products with sharp blades. However, it does not avoid breaks caused by subsequently injured edges (for example, during transport of the roll or the
  • the outer layer contains 60 wt .-% polypropylene copolymer with about 5 wt .-% of ethylene and to increase the toughness 40 wt .-% SBS Kauschuk, which deteriorates the light resistance and especially to reduced tensile strength (160 N / mm 2 ) and reduced stress at 10% elongation (70 N / mm 2 ) of the film in Longitudinal leads.
  • the less tough main layer contains 92% by weight of the polypropylene copolymer and 8% by weight of the SBS rubber.
  • the SBS rubber reduces the tear propagation resistance of a monolayer film of pure polypropylene copolymer with the same draw ratio of about 240 N / mm to 70 N / mm.
  • DE 44 02 444 A1 relates to a tear-resistant adhesive tape based on monoaxially oriented polyethylene.
  • polyethylene has a significantly lower heat resistance than polypropylene, which has a detrimental effect both in the production of the adhesive tape (drying of adhesive or other layers in the oven) as well as in later packaging applications as a grip tape, carton sealing tape, tear strips or paperboard reinforcing strips.
  • the adhesive tapes on the cartons often become hot, for example when passing through printing presses or after being filled with hot goods (for example, food).
  • Another disadvantage of (also stretched) polyethylene films compared to polypropylene films is the significantly lower force at 10% elongation.
  • the draw ratio of commercial monoaxially stretched polypropylene films used as a carrier in an adhesive tape is about 1: 7.
  • Stretch ratio of, for example, 1: 7 indicates that a section of the primary film of 1 m length forms a section of 7 m length of the stretched film. Often it will
  • An adhesive tape with a carrier of monoaxially stretched film can be provided with a release coating (release coating), if it should be easy to unroll. If the stretching ratio is increased in order to increase the stress at 10% elongation, it is found that, starting at a stretching ratio of 1: 8, the film is damaged by a customary release coating based on polyvinyl stearyl carbamate in toluene.
  • the release-coated film surface is sensitive to friction. Rubbing with an eraser on the painted surface will break it down into fine fibers. Fringing of the surface by friction in coating or cutting systems can lead to delamination of the film ("shredding") even when the adhesive tape rolls off.
  • cartons are provided with tapes for splicing or tearing and then stacked.
  • tapes for splicing or tearing and then stacked.
  • friction against the adhesive tape occurs.
  • friction in the processing of the cartons in packaging lines Such practical friction leads to the detachment of polypropylene fibers from the surface.
  • Toluene as common solvent for release coatings (release agent) alone has a damaging effect, this is further enhanced by release agents such as polyvinyl stearyl carbamate.
  • release agents such as polyvinyl stearyl carbamate.
  • the degree of damage increases with increasing stretch ratio (for example 1:10). If you use a silicone-based release coating, the effect is even more serious.
  • the film is even more damaged by silicone than by polyvinyl stearyl carbamate.
  • the damage occurs even at lower stretching ratios than 1: 8, and on the other hand, the damage of the film is observed not only on the side of the coating with release coating, but even on the opposite side, as if the silicone through the film through wandered. If such an adhesive tape is glued and then removed from the pad, it will split the film and thus tape residues.
  • polypropylene block copolymer having a flexural modulus of about 1200 MPa or a
  • the object of the invention is to provide a carrier film, in particular for an adhesive tape, on the one hand has a very high tensile modulus or a very high stress at 10% elongation in the longitudinal direction, which is not damaged by a release coating in particular by such silicone-based and does not have the mentioned disadvantages of the films of the prior art.
  • the invention relates to a carrier film, in particular for an adhesive tape which is monoaxially stretched in the longitudinal direction and which contains a layer of polypropylene, wherein • the tension of the carrier film in the longitudinal direction at 10% elongation at least
  • the layer contains a polypropylene polymer with an olefinic comonomer content of less than 2.5% by weight, preferably 0% by weight, the layer is not nucleated
  • the described negative effects can be prevented by a layer of polypropylene having at least 97.5% by weight of propylene.
  • a layer of polyethylene is more resistant to damage by release liners than a layer of polypropylene block copolymer or of a blend of a polypropylene and a polyethylene.
  • Polyethylene however, hardly contributes to the intended high stresses at low elongation in contrast to a polypropylene polymer according to the invention.
  • the adhesion can be improved, but again, polyethylene hardly contributes to the desired longitudinal mechanical properties, and above all, a layer of such a mixture is again susceptible to damage by release coating all at high draft to produce the desired mechanical properties.
  • the carrier film can be prepared analogously to the relatively simple extrusion process for monoaxially stretched polypropylene films. It has an increased stress at 10% elongation and tensile strengths in the longitudinal direction, which are between those of conventional monoaxially stretched polypropylene films and those of fiber-reinforced filament adhesive tape carriers, but the expensive process for producing filament adhesive tapes can be avoided.
  • the most commonly used polypropylene film for adhesive tapes is PP-BO (biaxially stretched polypropylene film). These show very low stresses at 10% elongation.
  • the stretching process conditions should be selected so that the stretch ratio is the maximum technically feasible for the film.
  • the stretch ratio in the longitudinal direction is preferably at least 1: 8, more preferably at least 1: 9.5.
  • nucleating agent is understood to mean that the polypropylene polymer does not have a self-nucleating property due to the polymer composition, such as for example, by modification with 4,4'-oxydibenzenesulfonyl azide, nor that the manufacturer adds a nucleating agent in the additization of the polypropylene polymer prior to granulation, or adds a nucleating agent in the preparation of the inventive film, for example, in the form of a masterbatch.
  • the effect of the nucleating agent is that the semi-crystalline polymer forms a different fiber structure during stretching than in the presence of a nucleating agent. It appears that the fiber interstices absorb the release coating, which then permanently causes a separation effect between the fibers, since the solvent causes no damage.
  • a non-nucleated polypropylene layer can apparently absorb the release coating little if at all.
  • the content of olefinic comonomer in the polypropylene polymer is found.
  • the content of comonomer is less than
  • Polypropylene homopolymer is present.
  • olefinic comonomers are ethylene, butylene and octene. It is assumed that copolymers of propylene in addition to the largely crystalline polypropylene phase form an amorphous elastomer phase, for example, from EPM rubber. If the proportion of comonomer is high, the volume fraction of the amorphous phase increases. It is known to those skilled in the art that it is easier to dissolve by solvents such as toluene than the crystalline regions. For a stretched polypropylene copolymer or terpolymer film, therefore, there should be solvent-sensitive amorphous interstices between the crystalline polypropylene fibers which can receive and pass through the release coating.
  • the layer preferably contains less than 10 wt .-%, more preferably less than 5 wt .-%, most preferably no polymers having a content of propylene of less than 80 wt .-%, such as PE-LLD.
  • the content of non-thermoplastic components such as, for example, fibers, fillers, pigments or antiblocking agents, is less than 5% by weight, more preferably less than 1% by weight, most particularly because of the required resistance to release coatings preferably no non-thermoplastic components are included.
  • the carrier film preferably contains no carbon nanotubes.
  • At least one coextrusion layer is applied in addition to the layer of the polypropylene polymer according to the invention on the side facing away from the release coating (release coating).
  • the layer preferably contains a polypropylene which also preferably has a flexural modulus of at least 1600 MPa, more preferably at least 2000 MPa.
  • the polypropylene of the layer is preferably predominantly isotactic.
  • the melt index should also be in the range suitable for flat film extrusion.
  • the melt index should be between 0.3 and 15 g / 10 min, preferably in the range of 0.8 and 5 g / 10 min (measured at 230 ° C / 2.16 kg).
  • the use of highly isotactic polypropylene is advantageous.
  • the thickness of the layer is preferably 3 to 20%, more preferably 5 to 10% of the total thickness of the film.
  • the layer serves to protect a coextrusion layer relevant for the mechanical properties of the film from damage by a release coating.
  • the layer or layers may contain additives such as antioxidants, light stabilizers, antiblocking agents, lubricants and processing aids, fillers, dyes and / or pigments.
  • the carrier film and an adhesive tape produced using the carrier film has a stress at 10% elongation in the longitudinal direction (machine direction) of at least 150 N / mm 2 , preferably at least 200 N / mm 2 , more preferably at least 250 N / mm 2 , In a preferred embodiment, even voltages of at least 300 N / mm 2 can be achieved.
  • the carrier film or an adhesive tape produced using the carrier film in the longitudinal direction has a stress at 1% elongation of at least 20 N / mm 2 , preferably at least 40 N / mm 2 and / or a tensile strength of at least 300 N / mm 2 , preferably at least 350 N / mm 2 .
  • the tear propagation resistance in the transverse direction should preferably reach at least 80 N / mm, in particular at least 220 N / mm.
  • the width-related force values are divided by the thickness. In the case of a determination of the strength values on the adhesive tape, the thickness is not based on the total thickness of the adhesive tape but only on the carrier film.
  • the thickness of the carrier film is preferably between 25 and 200 .mu.m, particularly preferably between 40 and 140 .mu.m, very particularly preferably between 50 and 90 .mu.m.
  • the carrier film preferably has no fin structures on the surfaces, since they deteriorate the adhesion during the stretching process and do not permit homogeneous stretching. If the film is constructed by multilayer coextrusion, according to a preferred embodiment of the invention it also has no rib structures in the interior, but plane-parallel oriented layers, so that no complicated and trouble-prone nozzle must be provided.
  • the film may be modified by lamination, embossing or radiation treatment.
  • the films can be provided with surface treatments. These are, for example, for adhesion promotion corona, flame, fluorine or plasma treatment or on the Separating paint side facing coatings of solutions or dispersions or liquid radiation-curable materials.
  • the carrier film comprises a release varnish (also called release layer, release or non-stick coating) on the layer, for example those made of silicone, acrylates (for example Primal® 205), stearyl compounds such as polyvinyl stearyl carbamate or chromium stearate complexes (for example Quilon® C) or from reaction products from maleic anhydride copolymers and stearylamine.
  • a release coating based on silicone.
  • the silicone can be applied solvent-free or solvent-borne and be crosslinked by radiation, a condensation or addition reaction, or physically (for example, by a block structure).
  • Release coatings serve to make an adhesive tape easy to unroll, in order to avoid a high force and / or strain of the wearer. The latter can lead to detachment of the adhesive tape by the stretched carrier shrinks back after the bonding of the tape.
  • the carrier film according to the invention can be used particularly advantageously in an adhesive tape by applying an adhesive to the carrier film on one side.
  • a film with a self-adhesive or a heat-activated adhesive layer is preferred.
  • they are not sealable adhesives but are pressure-sensitive adhesives.
  • the carrier film is coated on one side with pressure-sensitive adhesive as a solution or dispersion or 100% (for example from the melt) or by coextrusion with the carrier film.
  • the adhesive layer is located on the film side, which does not have the release coating.
  • the adhesive layer can be crosslinked by heat or high-energy radiation and, if necessary, covered with release film or release paper.
  • Suitable pressure-sensitive adhesives are in particular pressure-sensitive adhesives based on acrylate, natural rubber, thermoplastic styrene block copolymer or silicone.
  • the general term "adhesive tape” encompasses all flat structures such as films or film sections which are expanded in two dimensions, tapes of extended length and limited width, strip sections and the like, and ultimately also diecuts or labels.
  • the self-adhesive composition used can be blended with one or more additives, such as tackifiers (resins), plasticizers, fillers, pigments, UV absorbers, light stabilizers, aging inhibitors, crosslinking agents, crosslinking promoters or elastomers.
  • Suitable elastomers for blending are, for example, EPDM or EPM rubber, polyisobutylene, butyl rubber, ethylene-vinyl acetate, hydrogenated block copolymers of dienes (for example by hydrogenation of SBR, cSBR, BAN, NBR, SBS, SIS or IR; Example known as SEPS and SEBS) or acrylate copolymers such as ACM.
  • Tackifiers are, for example, hydrocarbon resins (for example, unsaturated C 5 or C 7 monomers), terpene-phenolic resins, terpene resins from raw materials such as ⁇ - or ⁇ -pinene, aromatic resins such as cumarone-indene resins or resins of styrene or ⁇ -methylstyrene such as rosin and its derivatives such as disproportionated, dimerized or esterified resins, whereby glycols, glycerol or pentaerythritol can be used.
  • Particularly suitable are age-stable resins without olefinic double bond such as hydrogenated resins.
  • Suitable fillers and pigments are, for example, carbon black, titanium dioxide, calcium carbonate, zinc carbonate, zinc oxide, silicates or silicic acid.
  • Suitable UV absorbers, light stabilizers and aging inhibitors for the adhesives are those which are listed in this document for the stabilization of the film.
  • Suitable plasticizers are, for example, aliphatic, cycloaliphatic and aromatic mineral oils, di- or poly-esters of phthalic acid, trimellitic acid or adipic acid, liquid rubbers (for example nitrile or polyisoprene rubbers), liquid polymers of butene and / or isobutene, acrylic esters, polyvinyl ethers, liquid and soft resins based on the raw materials to adhesive resins, wool wax and other waxes or liquid silicones.
  • liquid rubbers for example nitrile or polyisoprene rubbers
  • liquid polymers of butene and / or isobutene acrylic esters
  • polyvinyl ethers polyvinyl ethers
  • liquid and soft resins based on the raw materials to adhesive resins, wool wax and other waxes or liquid silicones.
  • Crosslinking agents are, for example, phenolic resins 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 and methacrylic acid.
  • the pressure-sensitive adhesive contains bright and transparent raw materials.
  • Particularly preferred are acrylic pressure-sensitive adhesives (for example as a dispersion) or pressure-sensitive adhesives of styrene block copolymer and resin (for example as are customary for hot melt pressure sensitive adhesives).
  • the coating thickness with adhesive is preferably in the range of 18 to 50 gg // mm 22 ,, 2222 iinnssbbeessoonnddeerree bbiiss 29 g / m 2.
  • the width of the adhesive tape rolls is preferably in the range of 2 to 60 mm.
  • Such an adhesive tape is suitable for reinforcing cardboard, in particular in the area of punched holes, as tear strips for cardboard boxes, as a carrying handle, for securing pallets and for bundling objects.
  • Such items are for example tubes, profiles or stacked boxes (strapping application).
  • the carrier film is produced in-line on a system in only two steps (extrusion, stretching) and additionally has much higher tear propagation resistances in the transverse direction (about 300 N / cm at 70 °) ⁇ m thickness).
  • melt index "Melt Flow Ratio" (MFR) is measured according to DIN 53,735th For polyethylenes melt indices are usually indicated in g / 10 min at 190 0 C and a weight of 2.16 kg, according to polypropylenes, but at a temperature of 230 0 C.
  • flexural modulus (flexural modulus): ASTM D 790 A Density: ASTM D 792
  • Crystallite melting point Determination by DSC according to ISO 3146
  • Nomenclature of plastics ISO 1043-1 Friction test: »10 strokes with an eraser Edding A 20 with a rounded corner
  • Dow Inspire 404.01 Polypropylene, MFI min 3 g / 10, nucleated, flexural modulus 2068 MPa, nucleated with a polymeric nucleating agent corresponding to US 2003/195300 A1, crystallite melting point 164 0 C (Dow Chemical)
  • PP 3281 PP-H, MFI 1, 1 g / 10 min, non-nucleated, density 0.905 g / cm 3, flexural modulus 1380 MPa, crystallite melting point 165 0 C (Atofina)
  • Dowlex 2032 PE-LLD (random copolymer of ethylene with 1-octene), MFI min 2.0 g / 10 min, density of 0.9260 g / cm 3, crystallite melting point 124 0 C (Dow Chemical)
  • PVSC polyvinyl stearyl carbamate (k + k chemistry)
  • a two-layer film is coextruded on a single-flute single-flute extrusion die with flexible die lip, followed by chill roll station and one-stage Short-gap stretching unit.
  • the coextruded layer is composed of Inspire D 404.01 and the layer of PP 3281.
  • the die temperature is 235 0 C.
  • the stretch ratio is 1: 10th
  • the film is corona pretreated on both sides, coated on the layer according to the invention with a 0.5% strength solution of Release Coat RA95D in toluene as release and dried.
  • the adhesive is from 42 wt .-% SIS elastomer, 20 wt .-% pentaerythritol ester of hydrogenated rosin, 37 wt .-% of a C 5 hydrocarbyl resin having a R & B value of 85 0 C and 1 wt .-% Antioxidant Irganox® 1010 melt-mixed and applied at 150 0 C with a nozzle on the underside of the film. Subsequently, the tape is wound to the mother roll and cut for further testing in 15 mm width.
  • Adhesive data • Adhesion to steel 2.2 N / cm
  • the film is prepared analogously to Example 1, but the stretching ratio is set at 1: 8.
  • raw materials for the coextrusion layer is a mixture of 98.9 wt .-% Moplen HP 556 E and 1, 1 wt .-% Remafingelb HG AE 30 used.
  • the layer consists of PP 3281.
  • the film is corona pretreated on both sides and then provided on the top with a silicone release varnish. It consists of 21,800 parts by weight of heptane, 3126 parts by weight of Dehesive 940A, 8 parts by weight of methylbutynol, 23 parts by weight of Crosslinker V24 and 31 parts by weight of Catalyst OL.
  • the underside is provided with a primer of natural rubber, cyclo rubber and 4,4'-diisocyanato-diphenylmethane.
  • the adhesive is from 40 wt .-% natural rubber SMRL (Mooney 70), 10 wt .-% of titanium dioxide, 37 wt .-% of a C 5 - hydrocarbon resin having a R & B value of 95 0 C and 1 wt .-% antioxidant Vulkanox ® BKF dissolved in hexane in a kneader.
  • the 20 wt .-% adhesive is applied with a brush the primed film underside and dried at 115 0 C. Subsequently, the tape is wound to the mother roll and cut for further testing in 15 mm width.
  • the film is produced analogously to Example 1, the layer and the coextrusion layer consist of Moplen HP 501 D, the draw ratio is 1: 9.8.
  • the film is corona pretreated on both sides and then further processed according to Example 2.
  • This film is also according to the invention. It passes the friction test with a polyvinyl stearyl carbamate-based release, even though the friction test with a silicone-based release (for the reasons outlined above) fails.
  • the film is produced analogously to Example 1, the coextrusion layer consists of Moplen HP 556 E, the draw ratio is 1: 9.7. Corona treatment and coating are carried out as in Example 2. Test results: film properties:
  • the film is prepared analogously to Example 1, but the stretching ratio is set at 1: 8 and the stretching roller temperature is reduced.
  • the raw materials used for the coextrusion layer are a mixture of 98.9 parts by weight of Moplen HP 501 D, 0.9 part by weight of remainder yellow HG AE 30 and 0.2 part by weight of ADK STAB NA-11 UH.
  • the layer according to the invention consists of Moplen HP 556 E.
  • Example 1 The production of film and coating is carried out according to Example 1, but the film is without a layer. The release is therefore applied to the layer of lnspire D 404.01.
  • the film is produced in accordance with Example 5, but the layer has the same composition as the coextrusion layer namely a mixture of 98.9 parts by weight of Moplen HP 501 D, 0.9 parts by weight of remainder yellow HG AE 30 and 0.2 Parts by weight ADK STAB NA-11 UH
  • a film is prepared analogously to Comparative Example 1 from 99.8 wt .-% Dow 7C06 and 0.2 wt .-% ADK STAB NA-1 1 UH with a stretch ratio of 1: 6.3.
  • a film is prepared analogously to Comparative Example 3 from Dow 7C06 with a draw ratio of 1: 6.1 with a slightly higher stretch roll temperature. Corona treatment and coating are carried out as in Example 1.
  • the film is produced according to Example 1, but the layer consists of Dow 7C06. Corona treatment and coating are carried out as in Example 2.
  • Film properties Carrier thickness after stretching 75 ⁇ m Thickness of the coextrusion layer 70 ⁇ m Thickness of the layer 5 ⁇ m Stress at 1% elongation 60 N / mm 2 Stress at 10% elongation 270 N / mm 2 Tensile strength 300 N / mm 2 Elongation at break 1 1%
  • the film is produced according to Comparative Example 4, the draw ratio is 1: 7.5, and the film consists of conventional polypropylene homopolymer HB 205 TF. Corona treatment and coating are carried out as in Example 1.
  • Friction test pass The positive result of the friction test is paid for with weaker mechanical data (stress at 1% and 10% elongation).
  • the film is produced according to Comparative Example 4, the draw ratio is 1: 7.5, and the film consists of 85 wt .-% HB 205 TF and 15 wt .-%. Dowlex 2032.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Adhesive Tapes (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un film support, notamment pour bande adhésive, qui s'étend de manière monoaxiale dans le sens longitudinal et contient une couche à base de polypropylène. L'invention se caractérise en ce qu'à 10% d'extension, la tension du film support dans le sens longitudinal est d'au moins 150 N/mm2, de préférence d'au moins 200 N/mm2, plus particulièrement d'au moins 250 N/mm2. La couche contient un polymère polypropylène à teneur en comonomère oléfinique inférieure à 2,5% en poids, de préférence 0% en poids, ladite couche n'étant pas nucléée et une couche de vernis de séparation étant appliquée sur une face de ladite couche.
EP09703455A 2008-01-22 2009-01-12 Film support, notamment pour bande adhésive et utilisation correspondante Withdrawn EP2235126A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810005564 DE102008005564A1 (de) 2008-01-22 2008-01-22 Trägerfolie insbesondere für ein Klebeband und Verwendung derselben
PCT/EP2009/050266 WO2009092640A1 (fr) 2008-01-22 2009-01-12 Film support, notamment pour bande adhésive et utilisation correspondante

Publications (1)

Publication Number Publication Date
EP2235126A1 true EP2235126A1 (fr) 2010-10-06

Family

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Application Number Title Priority Date Filing Date
EP09703455A Withdrawn EP2235126A1 (fr) 2008-01-22 2009-01-12 Film support, notamment pour bande adhésive et utilisation correspondante

Country Status (7)

Country Link
US (1) US20110014449A1 (fr)
EP (1) EP2235126A1 (fr)
JP (1) JP2011510143A (fr)
CN (1) CN101978010A (fr)
CA (1) CA2712712A1 (fr)
DE (2) DE102008005564A1 (fr)
WO (1) WO2009092640A1 (fr)

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DE102008005565A1 (de) * 2008-01-22 2009-07-23 Tesa Ag Folie aus Polypropylen, Verwendung derselben sowie Verfahren zur Herstellung der Folie
JP5598334B2 (ja) * 2011-01-07 2014-10-01 王子ホールディングス株式会社 粘着テープ
KR20160121559A (ko) * 2014-02-10 2016-10-19 테사 소시에타스 유로파에아 접착 테이프
CA2937601A1 (fr) * 2014-02-10 2015-08-13 Tesa Se Ruban adhesif
SI3119603T1 (sl) * 2014-03-21 2022-07-29 Loparex Germany Gmbh & Co. Kg Pakirna folija
WO2016091883A1 (fr) * 2014-12-10 2016-06-16 Güntner Gmbh & Co. Kg Système d'échange de chaleur, dispositif de dégivrage, ventilateur, échangeur de chaleur, boîtier et utilisation d'un vernis chauffant
US20220220264A1 (en) * 2019-05-31 2022-07-14 3M Innovative Properties Company Heat-treated, non-oriented (co)polymeric films and methods for making the same using an oriented carrier film

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Also Published As

Publication number Publication date
US20110014449A1 (en) 2011-01-20
WO2009092640A1 (fr) 2009-07-30
JP2011510143A (ja) 2011-03-31
DE102008005564A1 (de) 2009-07-23
CN101978010A (zh) 2011-02-16
CA2712712A1 (fr) 2009-07-30
DE112009000129A5 (de) 2011-03-10

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