WO2015011074A1 - Utilisation d'un ruban adhésif simple face comme bande d'aération - Google Patents

Utilisation d'un ruban adhésif simple face comme bande d'aération Download PDF

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Publication number
WO2015011074A1
WO2015011074A1 PCT/EP2014/065586 EP2014065586W WO2015011074A1 WO 2015011074 A1 WO2015011074 A1 WO 2015011074A1 EP 2014065586 W EP2014065586 W EP 2014065586W WO 2015011074 A1 WO2015011074 A1 WO 2015011074A1
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WO
WIPO (PCT)
Prior art keywords
adhesive tape
adhesive
previous
sided adhesive
strips
Prior art date
Application number
PCT/EP2014/065586
Other languages
German (de)
English (en)
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
Priority to EP14741322.3A priority Critical patent/EP3024905A1/fr
Publication of WO2015011074A1 publication Critical patent/WO2015011074A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/58—Moulds
    • B29C44/588—Moulds with means for venting, e.g. releasing foaming gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/18—Filling preformed cavities
    • 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
    • C09J7/21—Paper; Textile fabrics
    • 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
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/762—Household appliances
    • B29L2031/7622—Refrigerators
    • 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
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
    • C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
    • 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
    • C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
    • C09J2301/204—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive coating being discontinuous
    • 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
    • C09J2400/00—Presence of inorganic and organic materials
    • C09J2400/20—Presence of organic materials
    • C09J2400/26—Presence of textile or fabric
    • C09J2400/263—Presence of textile or fabric in the substrate
    • 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
    • C09J2400/00—Presence of inorganic and organic materials
    • C09J2400/20—Presence of organic materials
    • C09J2400/28—Presence of paper
    • C09J2400/283—Presence of paper in the substrate

Definitions

  • the present invention relates to the use of a single-sided self-adhesive tape as a venting tape which is adhered through an opening in a sealed body having a higher air pressure than the surrounding space.
  • White appliances such as refrigerator, freezer or fridge-freezer must have a very good insulation, including the side walls are usually filled with foam.
  • the foaming of the side walls of white devices is usually done by liquid polyurethane is filled through an opening in the cavity of the side wall. The polyurethane then foams up to fill the cavity.
  • tapes are taken as adhesive tape, which have a certain air permeability.
  • the one-sided self-adhesive equipped adhesive tape has a carrier, on which a hot melt adhesive is applied, and an air permeability carrier side greater than 30 cm 3 / (cm 2 * s).
  • the adhesive tape is perforated with hot needles, preferably located on a needle roller, the number of holes being at least 5 / cm 2 .
  • the object of the present invention is to provide a venting band, in particular in the foaming of bodies such as side walls of white appliances such as refrigerators, which is capable of reproducibly guaranteeing a given air permeability.
  • the invention relates to the use of a single-sided self-adhesive tape as a venting tape by adhering the tape over an opening in a sealed body having a higher air pressure than the surrounding space, especially in the foaming of bodies such as the sidewalls of white appliances such as refrigerators , in which
  • the adhesive tape has a carrier to which an adhesive, in particular self-adhesive, is applied on one side,
  • the adhesive is applied in at least two individual strips which have a shape deviating from a straight line.
  • From the concept of the invention comprises a variant in which the areas of the carrier material lying between the adhesive masking strips are not completely free of adhesive. In these areas, the thickness of the layer of adhesive layer is significantly reduced compared with the thickness of the adhesive strip (measured in the z-direction, ie perpendicular to the plane spanned in the longitudinal and transverse directions of the adhesive tape.)
  • the thickness of the layer of adhesive between the strips is limited to 5 ⁇ m in accordance with the invention. In these areas, the thickness of the adhesive coating is usually not constant, besides areas where the adhesive is extremely thin or is not present at all, there are areas in which a maximum of 5 ⁇ can be achieved.
  • the regions lying between the strips of adhesive tape permit improved passage of air in comparison to carriers coated over the entire surface.
  • a likewise per se air-permeable carrier for example a textile carrier, results in an adhesive tape, which is ideally suited to be used for the purpose according to the invention.
  • the tape is very permeable to gaseous substances (for example air), but on the other hand it is so stable and dense that the passage of foam can be safely prevented.
  • nonwoven fabrics are at least textile Fabrics according to EN 29092 (1988) as well as stitchbonded nonwovens and similar systems can also be used, and spacer fabrics and knitted fabrics with lamination can also be used.
  • Spacer fabrics are disclosed in EP 0 071 212 B1.
  • Spacer fabrics are mat-shaped laminates with a cover layer of a fibrous or filament nonwoven fabric, a backing layer and individual layers or tufts of retaining fibers present between these layers, which are needled through the particle layer distributed over the surface of the laminate body and interconnect the cover layer and the backing layer.
  • particles of inert rock particles such as, for example, sand, gravel or the like, are present in the holding fibers.
  • the holding fibers needled through the particle layer keep the cover layer and the underlayer spaced apart and are bonded to the cover layer and the underlayer.
  • nonwovens are particularly solid staple fiber webs, but also filament, meltblown and spun nonwovens in question, which are usually additionally solidify.
  • the mechanical, the thermal and the chemical hardening known. If, in the case of mechanical consolidation, the fibers are held together purely mechanically by swirling of the individual fibers, by intermeshing fiber bundles or by sewing in additional threads, thermal or chemical methods can be used to bond adhesive (with binder) or cohesive (binder-free) fiber-fiber Achieve bonds. With suitable formulation and process control, these can be limited exclusively or at least predominantly to fiber nodes, so that a stable, three-dimensional network is formed while maintaining the loose, open structure in the nonwoven.
  • Nonwovens have proven to be particularly advantageous, which are solidified in particular by overmilling with separate threads or by intermeshing.
  • Such solidified nonwovens are produced, for example, on "Malimo" stitchbonding machines from Karl Mayer, formerly Malimo, and are available, inter alia, from Hoftex Group AG Vlieses is solidified.
  • a fleece of the Kunit or Multiknit type can furthermore be used.
  • a Kunitvlies is characterized in that it results from the processing of a longitudinally oriented nonwoven fabric to a fabric having on one side mesh and on the other mesh webs or Polfaser-folds, but has neither threads nor prefabricated fabrics. Such a nonwoven fabric has also been produced for some time on, for example, "Malimo" stitchbonding machines from Karl Mayer.
  • nonwoven fabric can absorb high tensile forces in the longitudinal direction as a longitudinal nonwoven fabric characterized in that the fleece by the piercing on both sides with needles on both the top and on the underside undergoes solidification .
  • the starting material for a multi cut usually serve one or two produced by the Kunit method unilaterally intermeshed non-woven fabric fibers
  • both nonwoven tops are formed into a closed surface by fiber meshing and joined together by nearly vertical fibers.
  • nonwoven webs are suitable as a precursor to form a carrier according to the invention and an inventive adhesive tape.
  • a stitchbonded web is formed from a nonwoven material having a plurality of seams running parallel to one another. These seams are created by sewing or stitching of continuous textile threads. For this type of nonwoven stitching machines of the type "Malimo" Karl Mayer known.
  • Needle fleeces are also particularly suitable.
  • a batt becomes a sheet by means of barbed needles.
  • the material is solidified on a needle bar, whereby the individual fibers devour into a solid sheet.
  • the number and embodiment of the needling points determine the strength and strength of the fiber structures, which are generally light, air permeable and elastic.
  • a staple fiber fleece which is preconsolidated by mechanical processing in the first step or which is a wet fleece which has been hydrodynamically laid, wherein between 2% by weight and 50% by weight of the fibers of the fleece are melt fibers, in particular between 5 Wt .-% and 40 wt .-% of the fibers of the nonwoven.
  • Such a nonwoven fabric is characterized in that the fibers are wet-laid or, for example, a staple fiber fleece is pre-consolidated by the formation of loops of fibers of the fleece by needling, suturing, air and / or water jet machining.
  • the heat-setting takes place, wherein the strength of the nonwoven fabric is further increased by the melting or melting of the melt fibers.
  • the adhesive bonding of mechanically pre-consolidated or wet-laid nonwovens is of particular interest, and this can be achieved by adding binder in solid, liquid, foamed or pasty form.
  • Basic forms of administration are variously possible, for example solid binders as powders for trickling, as a foil or as a grid or in the form of binding fibers.
  • Liquid binders are dissolved in water or organic solvents or can be applied as a dispersion. Bonding dispersions are predominantly used for adhesive bonding: thermosets in the form of phenolic or melamine resin dispersions.
  • sions elastomers as dispersions of natural or synthetic rubbers or mostly dispersions of thermoplastics such as acrylates, vinyl acetates, polyurethanes, styrene-butadiene systems, PVC and the like. and their copolymers.
  • thermoplastics such as acrylates, vinyl acetates, polyurethanes, styrene-butadiene systems, PVC and the like. and their copolymers.
  • these are anionic or non-ionogenically stabilized dispersions, but in special cases, cationic dispersions may also be advantageous.
  • binder application can be carried out according to the prior art and can be read, for example, in standard works of the coating or nonwoven technology such as "nonwovens” (Georg Thieme Verlag, Stuttgart, 1982) or “Textiltechnik-Nonwoven Production” (Employer Group Inteltextil, Eschborn, 1996).
  • binders For adequate adhesive bonding of the nonwoven backing, it is generally necessary to add binders of the order of 1% to 50%, in particular 3% to 20%, based on the weight of the nonwoven fabric.
  • the addition of the binder can be carried out already during the nonwoven production, during the mechanical pre-consolidation or else in a separate process step, wherein this can be carried out in-line or off-line.
  • a condition has to be temporarily created for the binder in which it becomes adhesive and adhesively bonds the fibers - this can be achieved during drying, for example, of dispersions, but also by heating, whereby further variations can be achieved by surface or partial pressure application are.
  • the activation of the binder can be done in known drying channels, with a suitable choice of binder but also by means of infrared radiation, UV radiation, ultrasound, high-frequency radiation or the like.
  • the binder For the later end use, it makes sense, but not absolutely necessary, for the binder to have lost its stickiness after the end of the nonwoven production process. It is advantageous that volatile components such as fibrous auxiliaries are removed by thermal treatment and thus a nonwoven with favorable fogging values is produced, so that an adhesive tape with particularly favorable fogging values can be produced when using a low-fogging adhesive, and thus also the carrier has a very low level fogging.
  • the carrier has a surface ground on one or both sides smooth, preferably in each case a surface smoothed over the entire surface.
  • the smoothed surface may be chinted, as in, for example, EP 1 448 744 A1 is explained. In this way, the repellency of dirt is improved.
  • the starting materials for the carrier are in particular (chemical) fibers (staple fiber or continuous filament) of synthetic polymers, also called synthetic fibers, of polyester such as polyethylene terephthalate, polybutylene terephthalate, polyamide, polyimide, aramid, polyolefin, polyacrylonitrile or glass, (natural) fibers
  • synthetic polymers such as cellulosic fibers (viscose, modal, lyocell, cupro, acetate, triacetate, cellulon), such as rubber fibers, such as vegetable protein fibers and / or animal protein fibers and / or natural fibers of cotton, sisal, flax, silk, hemp, linen, coconut or Wool provided.
  • the present invention is not limited to the materials mentioned, but it can, recognizable to those skilled to work without having to be inventive, a variety of other fibers for the production of the web can be used.
  • yarns made from the specified raw materials are also suitable.
  • the fiber thickness is according to a preferred embodiment, between 0.5 to 100 ⁇ , more preferably between 2 to 50 ⁇ , more preferably between 5 to 30 m.
  • woven or laid single yarns can be made from a mixed yarn, so have synthetic and natural ingredients.
  • the warp threads and the weft threads are each of a type-specific design.
  • the warp threads and / or the weft threads can each consist only of synthetic threads or threads of natural raw materials.
  • Polyester is preferably used as the material for the carrier due to the excellent aging resistance and excellent resistance to chemicals.
  • the textile carrier spunbonded nonwoven is preferably a spunbonded nonwoven made of polyester, in particular of polyester and copolyester fibers, which moreover can be solidified and / or embossed flat with the aid of a calender.
  • the proportion of polyester fibers in the carrier is in a further advantageous embodiment of the invention more than 70 wt .-%, preferably more than 80 wt .-%, and to co-polyester fibers of less than 30 wt .-%, preferably less than 20 wt .-%.
  • the spunbonded nonwoven consists of polypropylene, which can also be thermally consolidated and embossed by means of a calender.
  • the basis weight of the textile carrier between 20 g / m 2 and 100 g / m 2 is more advantageously between 30 g / m 2 and 70 g / m 2 , particularly advantageously between 40 g / m 2 and 60 g / m 2 .
  • the carrier used is a woven fabric or, in particular, a nonwoven of polyester.
  • the fibers / filaments of the preferred nonwoven fabric may be anisotropically distributed, but may be oriented.
  • Suitable supports are also those made of paper.
  • the adhesive is applied in at least two individual strips which have a shape deviating from a straight line.
  • a plurality of preferably identical strips are present on the carrier material.
  • the stripes are congruent to each other. It is also advantageous if the strips do not branch.
  • the strips are essentially odd, so bent, for example. According to a preferred embodiment, they may be wave-shaped, in particular in the form of a sinusoid, sawtooth-like and / or zigzag-shaped.
  • FIG. 1 shows variants of the strips according to the invention. In addition, regularly formed punched lines are preferred (examples a3, b2, c1).
  • the invention can be carried out.
  • the strips are wave-shaped, and particularly preferably configured in a continuous, regular wave.
  • the strips of curves consist of a sequence of monotonously rising and sloping montonon curve sections, which may for example have the shape of a straight line.
  • the strips extend in a continuously differentiable curve.
  • the maxima and / or minima of these curves can-preferably-be designed such that the curve is differentiable at least in the extreme value range, so that the maximum or minimum is characterized by a "round" curve (and thus the curve at least in the extreme value range of Wave corresponds to the curve through the maximum corresponds to a wave crest or a wave trough.)
  • these are formed such that the curve is not differentiable there, so that there is a peak in the maximum and / or minimum (and thus the curve It is advantageous if the tips of the serrations are connected to one another by curve sections in the form of a straight line, so that the overall result is a zig-zag curve.
  • maxima or minima need not be punctiform designed, these can also be formed as a straight line section
  • Such a wave pattern is advantageously produced on the carrier by firstly coating the carrier over the entire surface with a self-adhesive, so that a uniform application of the adhesive to the carrier material results.
  • the coated web is guided at a particularly constant line speed under a comb scraper, which consists of a plurality of juxtaposed tines.
  • the tines all have the same width, more preferably, moreover, the distances between the individual tines are identical.
  • the combing blade is continuously reciprocated in a preferably uniform movement in the transverse direction of the web.
  • the tines of the comb doctor displace the adhesive from the carrier material so that a pattern is formed in the longitudinal direction results in many parallel waves of adhesive, between which (almost) Klebemassefit waves are present.
  • the amplitude of the described waviness of the strips is preferably half the tape width, more preferably up to the tape width.
  • the period length or wavelength which is the distance from the leading tongue to the leading tongue, is 0.8 to 1.5 of the tape width for wavy strips.
  • the width of the strips is according to a preferred embodiment between 0.3 to 5 mm, more preferably between 0.5 to 2.5 mm, most preferably between 0.8 and 1, 3 mm.
  • the (substantially) adhesive mass-free regions between the strips furthermore preferably have the same widths as the adhesive composition strips.
  • the strips extend in the longitudinal direction of the adhesive tape.
  • the strips form an angle with the (imaginary) longitudinal axis of the adhesive tape. Preferably, this angle is up to 45 °.
  • an angle of up to and including 90 ° is not excluded according to the invention.
  • FIG. 2 shows a particularly advantageous embodiment of the adhesive tape.
  • a waved adhesive tape is present on a nonwoven backing.
  • the backing is coated between 20 to 80% of its total area with the adhesive composition strips, preferably between 40 to 60%, more preferably between 48 and 52%.
  • the adhesive applied to the carrier material is a pressure-sensitive adhesive, that is to say an adhesive which, even under relatively weak pressure, permits a permanent connection with almost all adhesive reasons and can be detached again from the primer after use essentially without residue.
  • a PSA is permanently tacky at room temperature, so it has a sufficiently low viscosity and high tack, so that it wets the surface of the respective Klebegrunds already at low pressure.
  • the adhesiveness of the adhesive is based on its adhesive properties and the removability on their cohesive properties.
  • Acrylic hotmelt PSA usable.
  • the adhesive can be selected from the group of natural rubbers or synthetic rubber or any blend of natural rubbers and / or Synthetic rubbers are selected, wherein the natural rubber or natural rubbers in principle from all available qualities such as crepe, RSS, ADS, TSR or CV types, depending on the required level of purity and viscosity, and the synthetic rubber or synthetic rubbers from the Group of randomly copolymerized styrene-butadiene rubbers (SBR), butadiene rubbers (BR), synthetic polyisoprenes (IR), butyl rubbers (II FR), halogenated butyl rubbers (XI IR), acrylate rubbers ( ACM), the ethylene-vinyl acetate copolymer (EVA) and the polyurethanes and / or their blends can be selected. Further, it is preferable to add to the rubbers, for the purpose of improving the processability, thermoplastic elastomers having a weight proportion of 10 to 50% by weight, based on the total elastomer content.
  • styrene-isoprene-styrene (SIS) and styrene-butadiene-styrene (SBS) types may be mentioned as examples.
  • Suitable elastomers for blending are also, 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, such polymers for example known as SEPS and SEBS) or acrylate copolymers such as ACM.
  • SIS styrene-isoprene-styrene
  • Crosslinking is advantageous for improving the redetachability of the adhesive tape after use and may be thermal or by exposure to UV light or electron beams.
  • thermally activatable chemical crosslinkers such as accelerated sulfur or sulfur donor systems, isocyanate systems, reactive melamine, formaldehyde and (optionally halogenated) phenol-formaldehyde resins or reactive phenolic resin or diisocyanate crosslinking systems with the corresponding activators, epoxidized polyester and acrylate resins and combinations thereof.
  • the crosslinkers are preferably activated at temperatures above 50 ° C, in particular at temperatures of 100 ° C to 160 ° C, most preferably at temperatures of 1 10 ° C to 140 ° C.
  • the thermal excitation of the crosslinker can also be effected by IR radiation or high-energy alternating fields.
  • Suitable adhesives are solvent-based, water-based or even as a hot-melt system.
  • a composition based on acrylate hotmelt is also suitable, it being possible for it to have a K value of at least 20, in particular greater than 30, obtainable by concentrating a solution of such a composition into a system which can be processed as a hotmelt
  • the concentration can take place in suitably equipped boilers or extruders, in particular in the concomitant degassing a vented extruder is preferred.
  • self-adhesives used are copolymers of (meth) acrylic acid and their esters having 1 to 25 C atoms, maleic, fumaric and / or itaconic acid and / or their esters, substituted (meth) acrylamides, maleic anhydride and other vinyl compounds, such as vinyl esters, in particular vinyl acetate, vinyl alcohols and / or vinyl ethers used.
  • the residual solvent content should be below 1% by weight.
  • An adhesive which also shows to be suitable is a low molecular weight acrylate hot melt pressure-sensitive adhesive, such as that supplied by BASF under the name acResin UV or Acronal®, in particular Acronal® DS 3458 or AC Resin A 260UV.
  • This adhesive with a low K value obtains its application-oriented properties through a final radiation-induced crosslinking.
  • 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.
  • additives such as tackifiers (resins), plasticizers, fillers, pigments, UV absorbers, light stabilizers, aging inhibitors, crosslinking agents, crosslinking promoters or elastomers.
  • 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.
  • each adhesive penetrates during the coating onto a textile carrier in the textile carrier in order to be able to anchor in the carrier.
  • the individual fibers or yarns are surrounded by the adhesive, so that the adhesive layer is no longer to be separated from the carrier.
  • the anchoring is usually so strong that such an adhesive tape can be easily unwound from a roll without the anchoring of the adhesive breaks and it comes to the so-called rewinding of the adhesive (the adhesive is then on the back of the carrier).
  • it is expected of most pressure-sensitive adhesive tapes that they can be detached from the ground again, so that they can be resumed without leaving a trace. This means that the adhesive tape must not break adhesively between the carrier and the adhesive.
  • the adhesive has sunk after application to the carrier to more than 10%, preferably more than 25%, more preferably more than 50% in the carrier in the carrier.
  • a numerical value of, for example, 25% means that the adhesive has penetrated over a layer thickness of 25% of the thickness of the textile carrier, ie for a carrier having a thickness of 100 ⁇ m over a layer thickness of 25 ⁇ m adhesive within the carrier, and that starting from the surface of the support on which the adhesive is coated and in the direction perpendicular to the plane defined by the longitudinal and transverse directions, respectively.
  • the amount of coated adhesive is chosen according to a preferred embodiment so that even a good part of the partially sunken adhesive layer protrudes beyond the carrier.
  • the thickness of the non-absorbed adhesive layer is preferably more than 25 ⁇ m, more preferably more than 50 ⁇ m, more preferably more than 100 ⁇ m.
  • FIG. 3 shows in cross-section (cross-section) the adhesive tape consisting of a nonwoven backing 1 onto which is applied on one side a layer of a self-adhesive composition 2, which is additionally self-adhesive.
  • the adhesive is 25% sunken into the carrier, which causes an optimal anchoring.
  • the free top of the adhesive tape equipped on one side adhesive tape may be provided with a release agent, also called release.
  • Suitable release agents include but are not limited to surfactant release systems based on long chain alkyl groups such as stearyl sulfosuccinates or stearyl sulfosuccinamates Polymers which can be selected from the group consisting of Polyvinylstearylcarbamaten, Polyethyleniminstearylcarbamiden, chromium complexes of C 14 to C 2 8 fatty acids and stearyl copolymers. Also suitable are release agents based on acrylic polymers with perfluorinated alkyl groups, silicones or fluorosilicone compounds, for example based on poly (dimethyl-siloxanes). Most preferably, the release layer comprises a silicone-based polymer.
  • the carrier material can be subjected to a corona treatment.
  • the adhesive tape is between 150 and 500 ⁇ m, in particular between 200 and 350 ⁇ thick.
  • the elongation at break of the adhesive tape is according to an advantageous development between 10% and 50%, the maximum tensile force between 20 and 40 N / cm and / or the bond strength to steel above 1 N / cm, especially greater than 2.0 N / cm.
  • the adhesive tape has an air permeability on the carrier side of greater than 40 cm 3 / (cm 2 * s), in particular greater than 50 cm 3 / (cm 2 * s).
  • the air permeability mass side should be greater than 50 cm 3 / (cm 2 * s), preferably greater than 60 cm 3 / (cm 2 * s), more preferably greater than 75 cm 3 / (cm 2 * s).
  • the air permeability on the carrier side should be 500 cm 3 / (cm 2 * s), in particular 200 cm 3 / (cm 2 * s) and / or mass side 500 cm 3 / (cm 2 * s ), preferably 250 cm 3 / (cm 2 * s), do not exceed.
  • 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 adhesive tape can be rolled up on itself in the form of a roll, that is to say in the form of an Archimedean spiral, and also produced with adhesive materials such as siliconized paper or siliconized film.
  • a release material is preferably a non-fluffing material such as a plastic film or a well-glued, long-fiber paper.
  • the adhesive tapes have in particular run lengths of 1000 to 30,000 m.
  • the width of the rolls is usually 10, 15, 19, 25 and 30 mm.
  • a single-sided adhesive tape can be used, the application of adhesive preferably being between 15 and 70 g / m 2 , more preferably between 20 and 50 g / m 2 , even more preferably between 30 and 40 g / m 2 .
  • the adhesive tape is perforated, preferably with hot needles, which are preferably located on a needle roller, with a density of at least 5 / cm 2 .
  • the number of holes per cm 2 is greater than 10, more preferably greater than 15.
  • the diameter of the needles and the resulting diameter of the holes is between 0.5 and 1, 5 mm, in particular between 0.9 and 1, 00 mm.
  • the adhesive tape according to the invention which is self-adhesive on one side, is outstandingly suitable as a ventilation tape in that the adhesive tape is glued over an opening in a closed body which has a higher air pressure than the surrounding space, in particular in the foaming of bodies such as the side walls of white appliances such as refrigerators , Due to the fact that the strips of adhesive do not extend in a straight line in the longitudinal direction as usual, a further advantage of the adhesive tape according to the invention results.
  • a jumbo or mother roll is first produced by unrolling a very wide carrier ball (for example, 800 mm or 1000 mm) and then coating it with an adhesive.
  • the coated carrier is rewound into a roll, the jumbo or mother roll.
  • the mother roll is cut into individual adhesive tape rolls in the desired width.
  • a further advantage of the adhesive tape according to the invention is that due to the more or less irregular pattern of the recesses (not coated with adhesive) on the backing, holes to be closed are much less likely to be completely closed than in the variant with the straight stripe. In particular, when a plurality of smaller holes are arranged in a row one behind the other, it can easily happen that they are covered with a tape of adhesive, so that the venting effect of the adhesive tape is impaired.
  • a straight cutout of adhesive tape on the carrier acts like a smooth channel. That is, when foaming the body occurs foam from the opening of the body, with an increased leakage of the foam with the applied tape strip is to be avoided.
  • the foam hits a smooth and straight channel, it offers very little resistance. The foam would get in easily the channel can move outward. Due to the odd adhesive tape strips according to the invention and the spaces are odd. This means that the foam must overcome a much higher resistance to flow in the odd channels. The increased resistance in the interstices according to the invention leads to a much faster and more welcome stopping of the foam movement.
  • Particularly advantageous embodiments of the invention include the following adhesive tape variants: Spunbonded nonwoven with a basis weight of 35 to 55 g / m 2 , preferably on
  • the adhesive is applied in individual, longitudinally extending strips which have a shape deviating from a straight line, namely wave-shaped:
  • Width of adhesive-free strips 0.7 to 1
  • the adhesive is applied in individual longitudinal stripes which are straight:
  • FIG. 4 it is shown that, although the adhesive-free area is the same in both adhesive tapes (30%), the air permeability of the adhesive-free strips, which are wavy, is slightly better than that of the straight-line adhesive-free strips.
  • a strip of the self-adhesive tape to be examined is placed in a defined width (standard: 20 mm) on a ground steel plate (ASTM A 666 stainless steel 302, 50 mm ⁇ 125 mm ⁇ 1, 1 mm, glossy annealed surface, surface roughness 50 ⁇ 25 nm arithmetic Average deviation from the baseline) by rolling over ten times using a 4 kg steel roller. Identical samples are prepared and provided for immediate measurement.
  • the prepared plate is clamped (fixed) in the tester and the adhesive strip with its free end on a tensile tester at a peel angle of 180 ° with A speed of 300 mm / min in the longitudinal direction of the adhesive tape is removed from the plate.
  • the necessary force is determined.
  • the measurement results are given in N / cm (force normalized to the respective bonded bond line) and averaged over three measurements. All measurements are carried out in an air-conditioned room at 23 ° C and 50% relative humidity.
  • the tensile elongation behavior of the adhesive tape is determined on test specimens of type 2 (rectangular 150 mm long and possibly 15 mm wide test strips) according to DIN EN ISO 527-3 / 2/300 with a test speed of 300 mm / min, a clamping length 100 mm and a Pre-load of 0.3 N / cm determined. In the case of patterns with rough cut edges, the edges should be trimmed with a sharp blade before the tensile test. For the determination of the force or stress at 1% elongation, this is measured differently with a test speed of 10 mm / min and a precontrol setting of 0.5 N / cm on a tensile tester model Z 010 (manufacturer Zwick).
  • the testing machine is indicated because the 1% value can be slightly influenced by the evaluation program.
  • the tensile elongation behavior is tested in the machine direction (MD, direction of travel) unless otherwise specified.
  • the force is expressed in N / stripe width and the stress in N / stripe cross section, the elongation at break in%.
  • the test results, in particular the elongation at break (elongation at break), must be statistically verified by a sufficient number of measurements.
  • the air permeability is tested using GURLEY perforated plates.
  • the air permeability is expressed in the volume of air which passes through a certain area in a unit of time.
  • the following tools are used:

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesive Tapes (AREA)

Abstract

L'invention concerne l'utilisation d'un ruban adhésif simple face comme bande d'aération par collage de la bande adhésive sur un orifice ménagé dans un corps fermé dont la pression de l'air est supérieure à celle de l'espace environnant, notamment lors du moussage de corps tels que les parois latérales d'appareils blancs tels que les réfrigérateurs. Le ruban adhésif comporte un support sur lequel un adhésif, notamment un auto-adhésif, est appliqué d'un seul côté. L'adhésif est appliqué en au moins deux bandes individuelles dont la forme diffère d'une ligne droite.
PCT/EP2014/065586 2013-07-22 2014-07-21 Utilisation d'un ruban adhésif simple face comme bande d'aération WO2015011074A1 (fr)

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EP14741322.3A EP3024905A1 (fr) 2013-07-22 2014-07-21 Utilisation d'un ruban adhésif simple face comme bande d'aération

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DE102013214316.8 2013-07-22
DE102013214316.8A DE102013214316A1 (de) 2013-07-22 2013-07-22 Verwendung eines einseitig selbstklebend ausgerüsteten Klebebands als Entlüftungsband

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WO2015011074A1 true WO2015011074A1 (fr) 2015-01-29

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US20210403763A1 (en) * 2017-10-27 2021-12-30 Knauf Gips Kg Frieze tape
PL3927908T3 (pl) * 2019-02-19 2023-10-02 Knauf Gips Kg Taśma spoinowa do mocowania do sufitu lub ściany

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WO2000066355A1 (fr) * 1999-04-30 2000-11-09 Flexipak Tape Products, L.L.C. Bande de degazage
US20020090496A1 (en) * 2000-11-01 2002-07-11 Sang-Hoon Kim Adhesive tapes and adhesive note pads featuring non-adhesive sections
DE102004027557A1 (de) * 2004-06-04 2005-12-22 Tesa Ag Verwendung eines einseitig selbstklebend ausgerüsteten Klebebands als Entlüftungsband mit einer Luftdurchlässigkeit von größer 30 cm3/(cm2*s)

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DE19729905A1 (de) * 1997-07-12 1999-01-14 Beiersdorf Ag Trägermaterial für medizinische Zwecke
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WO2000066355A1 (fr) * 1999-04-30 2000-11-09 Flexipak Tape Products, L.L.C. Bande de degazage
US20020090496A1 (en) * 2000-11-01 2002-07-11 Sang-Hoon Kim Adhesive tapes and adhesive note pads featuring non-adhesive sections
DE102004027557A1 (de) * 2004-06-04 2005-12-22 Tesa Ag Verwendung eines einseitig selbstklebend ausgerüsteten Klebebands als Entlüftungsband mit einer Luftdurchlässigkeit von größer 30 cm3/(cm2*s)

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DE102013214316A1 (de) 2015-01-22
DE202014011388U1 (de) 2020-01-16

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