EP2235129A1 - Film à base de polypropylène, son utilisation et procédé de production dudit film - Google Patents

Film à base de polypropylène, son utilisation et procédé de production dudit film

Info

Publication number
EP2235129A1
EP2235129A1 EP09704462A EP09704462A EP2235129A1 EP 2235129 A1 EP2235129 A1 EP 2235129A1 EP 09704462 A EP09704462 A EP 09704462A EP 09704462 A EP09704462 A EP 09704462A EP 2235129 A1 EP2235129 A1 EP 2235129A1
Authority
EP
European Patent Office
Prior art keywords
film
film according
fibers
polypropylene
longitudinal direction
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Withdrawn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
EP09704462A
Other languages
German (de)
English (en)
Inventor
Bernhard MÜSSIG
Ilse Rodewald
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 EP2235129A1 publication Critical patent/EP2235129A1/fr
Withdrawn legal-status Critical Current

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Classifications

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    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
    • B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
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    • C08L2207/02—Heterophasic composition
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such 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
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
    • 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
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
    • C09J2301/41—Additional features of adhesives in the form of films or foils characterized by the presence of essential components additives as essential feature of the carrier layer
    • 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
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • 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
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
    • Y10T428/24994—Fiber embedded in or on the surface of a polymeric matrix
    • Y10T428/249942—Fibers are aligned substantially parallel
    • 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
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
    • Y10T428/24994—Fiber embedded in or on the surface of a polymeric matrix
    • Y10T428/249942—Fibers are aligned substantially parallel
    • Y10T428/249945—Carbon or carbonaceous fiber
    • 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
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
    • Y10T428/24994—Fiber embedded in or on the surface of a polymeric matrix
    • Y10T428/249942—Fibers are aligned substantially parallel
    • Y10T428/249946—Glass fiber
    • 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
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
    • Y10T428/24994—Fiber embedded in or on the surface of a polymeric matrix
    • Y10T428/249942—Fibers are aligned substantially parallel
    • Y10T428/249947—Polymeric fiber

Definitions

  • the invention relates to a film made of polypropylene, use thereof and to processes for producing the film.
  • High modulus, high tensile strength films are typically achieved by stretching extruded flat sheets 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 the film or the film carrier in the tape (due to blunt knife when cutting or later accidental injury of the cutting edge) easily to tearing or tearing under tensile load. Unstretched films, however, have high tear propagation resistance but low modulus and tensile strength.
  • EP 0 255 866 A1 is a longitudinally or biaxially oriented polypropylene film.
  • the addition of elastomeric components increases the
  • Stretch ratio in the longitudinal direction is 1: 5.5 to 1: 7.
  • Tensile strengths of 12 to 355 N / mm 2 are achieved. The tensile stresses at an elongation of 10% are unknown.
  • Beiersdorf Hamburg sold a tear strip with a reduced tear tendency.
  • the tough coextrusion outer layer reduces, according to the principle of impact modification, the formation of microcracks when cutting the product with sharp blades. However, it does not avoid breaks caused by subsequently injured edges (for example, during transport of the roll or the application to the carton), this requires a significantly higher tear propagation resistance.
  • 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 the longitudinal direction 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 significantly lower heat resistance than PP, which is detrimental both in the manufacture of the adhesive tape (drying of adhesive or other layers in the oven) and in later packaging applications as a handle 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 is the significantly lower force at 10% elongation compared to polypropylene films.
  • the invention achieves a high tear resistance in the transverse direction, the
  • the EP 1 101 808 A1 attempts to eliminate the disadvantages mentioned by the rib structures were moved into the interior of the film.
  • the film has plane-parallel
  • composition whose boundary surface is not flat, but in cross section has a non-straight boundary, which continues laminar in the longitudinal direction.
  • the special internal structure of the film is based on the fact that the thickness of a layer in the transverse direction varies periodically or irregularly and the second layer the
  • Adhesive tape improved tensile strength and modulus of elasticity in the longitudinal direction.
  • Stretch ratios are between 1: 6.7 and 1: 8.7.
  • Tensile strengths are reached at 202 to 231 N / mm 2 and stresses at 10% strain 103 to 147 N / mm 2 . All these inventions are not implemented on an industrial scale, since the production processes are very complex. Furthermore, they can by far not reach the properties of products with glass or polyester filaments.
  • the object of the invention is to provide a film, in particular for an adhesive tape, which does not have the mentioned disadvantages of the films of the prior art.
  • the invention relates to a film which contains at least one homopolymer, copolymer or terpolymer of propylene and fibers and is monoaxially stretched in the longitudinal direction, wherein the draw ratio is preferably at least 1: 8 and more preferably at least 1: 9.5, whereby an extremely high Tearing resistance in the transverse direction is achieved.
  • the film can be produced according to the relatively simple process for monoaxially longitudinally (machine direction) stretched PP films, so that it is not necessary to resort to the complicated process for the production of carriers with filaments for filament adhesive tapes.
  • the films according to the invention or adhesive tapes produced therefrom are also filament adhesive tape carriers or filament adhesive tapes in the Transparency superior, since the individual fibers, in contrast to filament bundles are embedded without air pockets.
  • the adhesive tapes produced with the films according to the invention have a higher rigidity, which reduces the risk of defective adhesions during dispensing during automatic application.
  • Another advantage over the known filament adhesive tapes is the smaller thickness, which allows longer run lengths of the rollers at predetermined maximum roll diameters, which reduces the frequency of reel changes in the user.
  • the film is stretched so much that the impact resistance across becomes very low. This may be disadvantageous for some applications, but has proven to be advantageous for applications such as reinforcement of die-cuts on cartons. A slight elongation due to high longitudinal stretching avoids the tearing of cardboard cardboard (for example on punched carrying handles). Such films tend to fibrillate in the longitudinal direction, which in the case of edge damage prevents further tearing in the transverse direction by deflection of the crack in the longitudinal direction and apparently improved in this way the tear propagation resistance.
  • the stretching process conditions should be selected such that the stretch ratio is the maximum technically feasible for film.
  • the stretching ratio in the longitudinal direction is at least 1: 8, preferably at least 1: 9.5.
  • a stretch ratio of, for example, 1: 6 indicates that a section of 6 m length of the stretched film is formed from a section of the primary film of 1 m length.
  • the draw ratio is also referred to as the quotient of the line speed before drawing and the line speed after drawing.
  • the film has the following properties:
  • a tensile strength of at least 300 N / mm 2 preferably at least 350 N / mm 2 , more preferably at least 400 N / mm 2
  • a stress at 1% elongation of at least 20 N / mm 2 preferably at least 40 N / mm 2 ,
  • a stress at 10% elongation of at least 170 N / mm 2 preferably at least 200 N / mm 2 , more preferably at least 300 N / mm 2 and / or
  • the film is not rupturable when testing the tear propagation resistance in the transverse direction.
  • the width-related force values are divided by the thickness.
  • the thickness is not based on the total thickness of the adhesive tape but only on the carrier film.
  • the thickness of the film is preferably between 25 and 200 microns, more preferably between 40 and 140 microns, most preferably between 50 and 90 microns.
  • Carrier film preferably has a failure characteristic of 2 or 3 and more preferably of 3. The failure feature is explained in detail under the test methods.
  • Suitable film raw materials for the production of the film are commercially available polypropylene homo-, polypropylene co- and polypropylene terpolymers including the block (impact) and random polymers.
  • the melt indices of the polymers mentioned must be in the range suitable for flat film extrusion. This range 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 polypropylene is preferably predominantly isotactic.
  • the flexural modulus should be at least 1000 MPa, preferably at least 1500 MPa, more preferably at least 2000 MPa.
  • the film has a co-extrusion layer on at least one of the two outer sides.
  • the coextrusion layer preferably contains a polyolefin having a lower crystallinity than a predominantly isotactic polypropylene homopolymer, which generally has a crystallite melting point of about 160 to 163 0 C.
  • a polyolefin having a lower crystallinity than a predominantly isotactic polypropylene homopolymer which generally has a crystallite melting point of about 160 to 163 0 C.
  • fibers are staple fibers and non-continuous filaments or
  • Nanotubes for example, MWCNT (“multiwall carbon nanotubes”)
  • MWCNT multiwall carbon nanotubes
  • filament bundles for filament adhesive tapes laminated on foils are used, and nanotubes tend to be used during processing
  • fibers with a high modulus of elasticity such as hemp, sisal, flax, banana fibers, coconut, pineapple, aramid, polyaraylate, glass, silicon carbide, aluminum silicate, basalt or carbon, in particular E- and textile glass.
  • the fibers are preferably provided with a size (coupling agent) to optimize the attachment to the polymer matrix.
  • Sizing bases are native starch, modified starches, sodium carboxymethylcellulose, polyvinyl alcohol, polyacrylates, galactomannans (guar and locust bean gum), for special applications also water-dispersible polyesters, vinyl acetate copolymers, glue, gelatine and proteins.
  • the sizings may still contain fats, waxes, sulfated tallow or sulfated oil.
  • the fiber diameter is preferably in the range of 4 to 30 .mu.m, in particular between 9 and 16 microns.
  • the length of the fibers is preferably at least 100, more preferably at least 300 microns.
  • the proportion of fibers in the film is preferably 0.5 to 10 wt .-%, in particular 3 to 6 wt .-%.
  • the polymers of the film may be used in pure form or in admixture with additives such as antioxidants, sunscreen, antiblock, slip and processing aids, fillers, dyes, pigments, blowing and / or nucleating agents.
  • additives such as antioxidants, sunscreen, antiblock, slip and processing aids, fillers, dyes, pigments, blowing and / or nucleating agents.
  • the film is preferably nucleated.
  • the nucleant may be added in pure form or preferably as a masterbatch, or the polypropylene is self-nucleating. All suitable nucleating agents ( ⁇ - or ⁇ -crystals) are suitable. These are organic nucleating agents such as benzoates, phosphates or sorbitol derivatives. Such nucleating agents are described, for example, in chapter "9.1.
  • the production of the carrier film can be carried out by calendering, flat film or blown extrusion and preferably with flat film extrusion (also called T-die or Cast process) with subsequent stretching in the longitudinal direction.
  • a particularly advantageous process for producing a film according to the invention comprises the following steps. if appropriate, mixing of the polypropylene with the fibers in an extruder, optionally granulation of the compound,
  • the last steps are to make an adhesive tape from the film.
  • the application of the adhesive can already take place during the extrusion of the film by the adhesive being coextruded with the film.
  • the adhesive can be applied according to a variant later in a separate step.
  • the mixture may be carried out separately in an extruder or kneader or using suitable mixing elements in the film extruder.
  • a mixture of polypropylene, from the fiber masterbatch and optionally from the additives is fed to the film extruder.
  • the film may be single or multi-layered.
  • the coextrusion can avoid deposition during stretching of the film and problems with coating with release, primer or adhesive.
  • the films may be modified by lamination, embossing or radiation treatment or provided with surface treatments. These are, for example, for adhesion promotion corona, flame, fluorine or plasma treatment or primer coatings of solutions or dispersions or liquid radiation-curable materials.
  • coatings are printing and non-stick coatings, for example those of crosslinked silicones, acrylates (for example Primal® 205), polymers with vinylidene chloride or vinyl chloride as monomer or stearyl compounds such as polyvinyl stearyl carbamate of the chromium stearate complexes (for example Quilon® C) or reaction products of maleic anhydride copolymers and stearylamine ,
  • the inventive film can be used without adhesive coatings for packaging or bundling applications.
  • the connection of the ends can be done as in conventional straps for cartons, cases or boxes of iron, polyethylene or polypropylene by metal brackets or welding.
  • the inventive film is applied in the form of an adhesive tape.
  • adhesive tape is understood as meaning a film having a self-adhesive or a heat-activatable adhesive layer.
  • they are not sealable adhesives but are pressure-sensitive adhesives.
  • the film is coated on one side with pressure-sensitive adhesive as a solution or dispersion or 100% (for example melt) or by coextrusion with the film.
  • the adhesive layer (s) can be crosslinked by heat or high-energy rays 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.
  • adheresive 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 mixed with one or more additives, such as tackifiers (resins), plasticizers, fillers, pigments, UV absorbers, light stabilizers, anti-aging agents, crosslinking agents, crosslinking promoters or elastomers.
  • additives such as tackifiers (resins), plasticizers, fillers, pigments, UV absorbers, light stabilizers, anti-aging agents, 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, glycols, glycerol or pentaerythritol can be used.
  • Particularly suitable are age-stable resins without olefinic double bond such as hydrogenated resins.
  • Fillers and pigments such as carbon black, titanium dioxide, calcium carbonate, zinc carbonate, zinc oxide, silicates or silica may be used.
  • Suitable UV absorbers, light stabilizers and aging inhibitors for the adhesives are the same as those 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.
  • Preferred embodiment contains pressure-sensitive adhesive of light 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 from 18 to 50, in particular 22 to 29 g / m 2 .
  • the width of the adhesive tape rolls is preferably in the range of 2 to 60 mm.
  • the adhesive tape according to the invention is suitable, for example, for packaging applications such as reinforcement of cardboard packaging, in particular in the field of punches, as a tear strip, as a carrying handle, for pallet securing or for bundling.
  • the films can be categorized with regard to their failure pattern, which can also be used as a quality criterion for the tear propagation resistance:
  • the sample first tears in the longitudinal direction until reaching the clamping clamps, then the sample tears transversely to the test direction when reaching the tensile strength. This crack behavior is an indication of high tear propagation resistance of the film.
  • the sample first tears longitudinally until it reaches the grips, then the sample, splicing in the longitudinal direction when reaching the tear strength, breaks into many individual fibers, which then ultimately break in the transverse direction. This cracking behavior is an indication of a particularly high tear propagation resistance of the film.
  • Melt Flow Ratio is measured according to DIN 53735.
  • melt indices are usually reported in g / 10 min 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 Adhesive Bonding data: AFERA 4001, corresponding to DIN EN 1939 Transparency: visually
  • TI-4007-G PP impact copolymer, MFI 0.7 g / 10 min, non-nucleated, flexural modulus 1200 MPa (Sunoco Chemicals)
  • a single-layer film is produced on a single-flute single-screw extruder with flat die with a flexible die lip, followed by a chill roll station and a one-step short-split stretch machine.
  • the raw material used is Inspire D 404.01 and Xmod GA265Z in a mixing ratio of 4: 1.
  • the nozzle temperature is 230 0 C.
  • Crystallinity of the film before and after the stretching process is as high as possible.
  • the stretch ratio is 1: 8.6.
  • the film is corona pretreated on both sides, coated on top with a 0.5% solution of PVSC in toluene as a release and dried.
  • the adhesive is composed of 42% by weight of SIS elastomer, 20% by weight of pentaerythritol ester of hydrogenated rosin, 37% by weight of a C 5 hydrocarbon resin having an 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.
  • the film is prepared analogously to Example 1.
  • the raw materials used are TI4007-G and RTP 100AR15 in a mixing ratio of 3: 1.
  • the stretch ratio is 1: 8.
  • the film is corona pre-treated on one side and coated with Primal® PS 83 B (Rohm & Hass) and dried. Subsequently, the tape is wound to the mother roll and cut for further testing in 15 mm width.
  • a single-layer film in strapping quality is made from Moplen EPQ 30 RF with a draw ratio of 1: 8.
  • the processing to the adhesive tape is carried out analogously to Example 1 of EP 1 101 808 A2.
  • Example 1 has the highest tensile strength and stress at 10% elongation along.
  • the stretch ratio is 1: 7.5.
  • Example 1 has the highest tensile strength and stress at 10% elongation along.
  • the stretch ratio is 1: 8.7.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Adhesive Tapes (AREA)
  • Laminated Bodies (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Wrappers (AREA)

Abstract

L'invention concerne un film, notamment pour bande adhésive. L'invention se caractérise en ce que ledit film contient au moins un homopolymère, un copolymère ou un terpolymère de propylène, ainsi que des fibres et s'étend de manière monoaxiale dans le sens longitudinal. Le rapport d'allongement est de préférence d'au moins 1:8 et plus particulièrement d'au moins 1:9,5.
EP09704462A 2008-01-22 2009-01-12 Film à base de polypropylène, son utilisation et procédé de production dudit film Withdrawn EP2235129A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810005565 DE102008005565A1 (de) 2008-01-22 2008-01-22 Folie aus Polypropylen, Verwendung derselben sowie Verfahren zur Herstellung der Folie
PCT/EP2009/050276 WO2009092643A1 (fr) 2008-01-22 2009-01-12 Film à base de polypropylène, son utilisation et procédé de production dudit film

Publications (1)

Publication Number Publication Date
EP2235129A1 true EP2235129A1 (fr) 2010-10-06

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EP09704462A Withdrawn EP2235129A1 (fr) 2008-01-22 2009-01-12 Film à base de polypropylène, son utilisation et procédé de production dudit film

Country Status (7)

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US (1) US8048514B2 (fr)
EP (1) EP2235129A1 (fr)
JP (1) JP2011511720A (fr)
CN (1) CN101978013B (fr)
CA (1) CA2713087A1 (fr)
DE (1) DE102008005565A1 (fr)
WO (1) WO2009092643A1 (fr)

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DE102008005561A1 (de) * 2008-01-22 2009-07-23 Tesa Ag Polyolefinfolie und Verwendung derselben
DE102008005565A1 (de) * 2008-01-22 2009-07-23 Tesa Ag Folie aus Polypropylen, Verwendung derselben sowie Verfahren zur Herstellung der Folie
DE102010009942A1 (de) 2010-03-02 2011-09-08 Hans Korte Faserverstärkte Thermoplastfolie und deren Herstellung
CN102206380A (zh) * 2011-04-11 2011-10-05 山东理工大学 汽车门板用复合材料的制备方法
DE102012215133A1 (de) * 2012-08-24 2014-02-27 Tesa Se Strapping-Klebeband
KR101465736B1 (ko) * 2013-04-30 2014-12-01 주식회사 한국이엔티 인장강도가 향상된 고강도 필름사와 성형방법 및 성형장치
CA2915829C (fr) 2013-07-12 2021-05-11 Converdis Inc. Substrats a base de papier pliables revetus par des revetements a base d'eau et procede pour revetir des substrats a base de papier pliables
EP3105297A1 (fr) * 2014-02-10 2016-12-21 tesa SE Ruban adhesif
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JP2011511720A (ja) 2011-04-14
CA2713087A1 (fr) 2009-07-30
DE102008005565A1 (de) 2009-07-23
US20110020629A1 (en) 2011-01-27
WO2009092643A1 (fr) 2009-07-30
CN101978013A (zh) 2011-02-16
US8048514B2 (en) 2011-11-01

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