WO2010063498A1 - Verstreckte thermoplaste zur verklebung von metallteilen auf kunststoffen, gläsern und metallen und verfahren zu ihrer herstellung - Google Patents
Verstreckte thermoplaste zur verklebung von metallteilen auf kunststoffen, gläsern und metallen und verfahren zu ihrer herstellung Download PDFInfo
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- WO2010063498A1 WO2010063498A1 PCT/EP2009/060964 EP2009060964W WO2010063498A1 WO 2010063498 A1 WO2010063498 A1 WO 2010063498A1 EP 2009060964 W EP2009060964 W EP 2009060964W WO 2010063498 A1 WO2010063498 A1 WO 2010063498A1
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- adhesive
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- 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
- 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
- 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
- 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
- B29C55/065—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 in several stretching steps
-
- 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
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
-
- 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
-
- 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
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
-
- 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
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
- B29K2067/04—Polyesters derived from hydroxycarboxylic acids
- B29K2067/046—PLA, i.e. polylactic acid or polylactide
-
- 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
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
-
- 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
- C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
-
- 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
-
- 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
- C09J2301/50—Additional features of adhesives in the form of films or foils characterized by process specific features
-
- 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
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
-
- 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
Definitions
- thermoplastics for bonding metal parts to plastics, glasses and metals and process for their preparation
- the invention relates to processes for the production of stretched, flat adhesives based on heat-activatable thermoplastics and to corresponding stretched adhesives, and also to their use for bonding metal parts to plastics for portable consumer goods electronics articles.
- the use is based on the use of special thermoplastic heat-activatable films for fixing the metal parts on the plastic parts.
- double-sided pressure-sensitive adhesive tapes are usually used.
- the adhesive forces required for this purpose are sufficient for fixing and fastening the metal components on the plastics.
- the metals used are preferably steel, stainless steel and steel with chromations.
- the plastics used are, for example, PVC, ABS, PC, PPA, PA or blends based on these plastics.
- the demands are constantly increasing. On the one hand, these articles are getting smaller and smaller, so that also the bonding surfaces are getting smaller.
- the bonding has to meet additional requirements, since portable articles are used in a wider temperature range and can also be subjected to mechanical stress such as impacts, falls, etc. These conditions are particularly problematic for metal bonding on plastics.
- the plastic can absorb part of the energy in a fall, while metals do not deform at all.
- the tape needs to absorb much of the energy. This can be done in a particularly efficient manner by the use of heat-activatable films that can form a particularly high bond strength after activation.
- the different ones Expansion coefficients of metals and plastics are a problem. Thus, in the case of rapid temperature changes, tensions can occur between the plastic and metal components.
- Heat-activatable adhesives can be subdivided into two categories, the a) thermoplastic, heat-activatable films and the b) -reactive, heat-activatable films.
- thermoplastic systems also have disadvantages.
- relatively soft and elastic thermoplastics are used for bonding.
- thermoplastics Due to the softness, the thermoplastics can be punched relatively poorly.
- thermoplastic copolyesters or copolyamides have the disadvantage of receiving a relatively large amount of moisture. This always causes disadvantages during the bonding, such as a bubbling that weakens the bond.
- Another disadvantage of the thermoplastics also shows up during the bonding process.
- the shape of the heat-activatable film has a relatively strong tendency to squeeze out in the heat-bonding step, since the viscosity decreases significantly during heating and temperature activation.
- thermoplastic, heat-activatable adhesive especially in the form of a film, which does not have these disadvantages mentioned or improves the existing problems.
- thermoplastic, heat-activatable adhesive especially in the form of a film
- the invention is based on the object of providing a thermoplastic heat-activatable film for bonding which has a reduced squeezing behavior during the bonding process and a reduced water absorption capacity during storage or in storage prior to bonding and thus reduces the formation of bubbles in the adhesive joint and / or can be prevented during hot bonding.
- the object is achieved according to the information of independent claims 1, 5 and according to the independent claims 9, 12, 13, and 14.
- the object is achieved by a method comprising the following steps: a) Extruding or extrusion coating of a heat-activatable thermoplastic b) stretching the heat-activatable thermoplastic film in the machine direction by at least a factor of 3, wherein the drawing temperature is preferably at least 30% below the extrusion temperature and the enthalpy of fusion of the stretched thermoplastic adhesive is at least 30% above the enthalpy of fusion of the unstretched state of the adhesive, in particular of the thermoplastic. c) the oriented heat-activatable thermoplastic film is applied to a support.
- the invention relates to a process for producing a stretched, flat adhesive having at least one heat-activatable polymeric thermoplastic and optionally at least one support, and a corresponding drawn, sheet-like adhesive obtainable by the process, comprising the following steps,
- thermoplastic, sheet-like adhesive in particular a thermoplastic film or a thermoplastic film
- Polymer chains of the thermoplastic in particular to increase the orientation of the polymer chains, preferably in comparison to the extruded thermoplastic, leads, and
- the inventive semi-crystalline thermoplastic heat-activated stretched, sheet-like adhesives have an increased crystalline content and / or an increased proportion of oriented polymers due to the stretching in comparison to correspondingly untreated adhesives, in particular only extruded adhesives on.
- the stretching of the respective thermoplastic and the associated increased orientation of the polymer chains and / or increased crystallinity be detected, inter alia by X-ray powder diffractometry or conventional spectroscopic methods.
- the orientation of the extruded thermoplastic in the machine direction is at least a factor of 4, particularly preferably a factor of 5.
- the factor is the ratio of the initial length of the extruded adhesive to the elongation of the stretched adhesive (L 1 : L 2 -L 1 ).
- the stretching of the thermoplastics is limited.
- the extruded thermoplastic especially in the form of a film or a film, can be stretched in the machine direction until shortly before the tear limit.
- Stretching of semi-crystalline materials can generally be done in different temperature ranges with different resultant properties of the stretched materials.
- the stretching according to the method a) according to the invention can be carried out at a temperature or in a temperature range above the crystallite melting range of the thermoplastic with subsequent cooling of the flat, stretched adhesive.
- the crystallite melting range is preferably between
- the stretching in the temperature range of the crystalline melting region of the thermoplastic can be carried out with subsequent cooling of the flat, stretched adhesive or c) the stretching can be carried out at a temperature below the crystallite melting range of the thermoplastic.
- the crystalline melting range is defined as the onset temperature at which the peak begins to form in the DSC.
- the stretching is carried out at a temperature or in a temperature range above the crystallite melting temperature as melt stretching.
- the stretching takes place, for example, in a slot die, such as a slot die and / or between slot die and support point and / or on the cooling roll by rollers, which have a different speed.
- the generated anisotropic orientation is then by means of the cooling roller in this state by cooling the stretched Thermoplastics frozen. It can be cooled to or below the crystallization temperature.
- the cooling can be done in any way imaginable, for example, as mentioned by active cooling by cooling rollers but also a slow cooling over a longer period may be appropriate.
- the stretching in the process is carried out in a temperature range which is at least about 30% below the extrusion temperature; or in a range which is below the crystallization temperature of at least partially crystalline thermoplastics or below the crystallite melting temperature of the thermoplastic.
- the stretching is carried out at a temperature which is at least about 40%, more preferably about 50% below the extrusion temperature, but above 30 0 C.
- the film can be stretched at room temperature in the machine direction.
- Increasing the orientation of the polymer chains during the stretching results in an increase in the enthalpy of fusion, in particular if this state can essentially be fixed.
- Proper process control results in at least about 30% increase in the enthalpy of fusion of the stretched thermoplastic relative to the extruded unstretched thermoplastic and preferred process guides increase the enthalpy of fusion of the thermoplastic after stretching by at least 40% above the enthalpy of fusion of the unstretched state.
- Particularly preferred process conditions require an increase in the enthalpy of fusion of preferably by 60% above the enthalpy of fusion of the unstretched state. In extreme cases, values above 100% can also be realized.
- the extruded sheet adhesive can be provided in the process generally before stretching with at least one elastic support and / or be provided after stretching as a stretched, flat adhesive with at least one carrier.
- the stretched adhesive is provided with one or more reversibly releasable supports.
- the two adhesive sides of the flat adhesive Preferably on the two adhesive sides of the flat adhesive.
- the invention likewise relates to a stretched, flat adhesive having at least one heat-activatable polymeric thermoplastic, wherein the stretched thermoplastic is present in particular as a film or films, and optionally provided with at least one carrier, wherein the enthalpy of fusion of the particular extruded and stretched thermoplastics by at least 30 % with respect to the corresponding unstretched, in particular extruded, thermoplastic, in particular, the enthalpy of fusion is at least 40% to 100%, preferably at least 60% to 100%, particularly preferably from 50% to 70% with respect to the corresponding unstretched Thermoplastics increased.
- the stretched, flat adhesive is based on heat-activatable polymers or mixtures thereof, which are selected from thermoplastics, reactive resins and / or fillers or mixtures of at least two of said compounds, especially if the stretched, flat adhesive consists thereof, and optionally provided with at least one carrier.
- Suitable carriers are conventional release films or papers, which are usually provided with a release agent, in particular as a release layer or release coating, for the reversible connection of the thermoplastic with the carrier.
- the supports may include conventional supports as discussed below.
- thermoplastics are similar in composition, weight and dimensions, such as film thickness and dimensions.
- the adhesive stretched according to the invention has, in addition to the reduced absorption of moisture, which is attributed to an increased crystallinity of the thermoplastic, without being bound to this theory, moreover an improved squeezing behavior.
- the Ausquetsch by gluing under Pressure and temperature influence, is determined under substantially the same conditions for stretched, flat and only extruded thermoplastics.
- the stretched, flat adhesives of the heat-activatable thermoplastic have a squeezing behavior reduced by 2 to 25% relative to unstretched thermoplastics under otherwise substantially identical conditions, in particular squeezing behavior is about 10%, preferably about 20% %, each with a tolerance of plus / minus 5%.
- an object of the invention is a stretched, flat adhesive of a defined shape, in particular in the form of a stamped or cut or cut by laser cutting process form.
- the two-dimensional adhesive is preferably present as a film, foil or as a coating.
- the invention likewise relates to a stretched, flat adhesive, obtainable by the above process, with at least one heat-activatable polymeric thermoplastic and optionally with at least one support, wherein the melting enthalpy of the stretched adhesive, in particular the stretched thermoplastic, by at least 30% with respect to correspondingly unstretched, extruded adhesives, in particular the corresponding unstretched, extruded, thermoplastics, in particular, the enthalpy of fusion is at least 40% to 100%, preferably by 60% to 100%, particularly preferably by 50% to 70% with respect to correspondingly unstretched thermoplastics increased.
- thermoplastics for the preparation of heat-activatable adhesives according to the invention in the form of films or films, it is generally possible first of all to use all suitable thermoplastics which undergo heat activation for Bonding can be used as well as orienting under stretching and can form crystalline areas.
- thermoplastics are used with a softening temperature of greater than 85 ° C and less than 150 0 C, which soften usually thermoplastics in a temperature range.
- thermoplastics are, for example, polyesters or copolyesters, polyamides or copolyamides, polyolefins, for example polyethylene (Hostalen®, Hostalen Polyethylen GmbH), polypropylene (Vestolen P®, DSM), the list not being exhaustive. Furthermore, blends of different thermoplastics can be used.
- poly- ⁇ -olefins are used.
- Various heat-activatable poly- ⁇ -olefins are commercially available from Degussa under the trade name Vestoplast TM.
- the proportion of resins is between 2 and 30 wt .-% based on the thermoplastic or thermoplastic blend.
- the addition of the resins or other thermoplastics must not destroy the crystallization capacity of the thermoplastics or blends, in particular the crystallization capacity must not be reduced too much.
- tackifying resins to be added all previously known adhesive resins described in the literature can be used without exception. These resins are familiar to those skilled in the art. Mention may be made representative of the pinene, indene and rosin resins, their disproportionated, hydrogenated, polymerized, esterified derivatives and salts, the aliphatic and aromatic hydrocarbon resins, terpene resins and terpene phenolic resins and C5, C9 and other hydrocarbon resins. Any combination of these and other resins can be used to adjust the properties of the resulting adhesive as desired.
- thermoplastic (soluble) resins can be used, in particular, it is referred to all aliphatic, aromatic, alkylaromatic hydrocarbon resins, hydrocarbon resins based on pure Monomers, hydrogenated hydrocarbon resins, functional hydrocarbon resins and natural resins.
- aliphatic, aromatic, alkylaromatic hydrocarbon resins hydrocarbon resins based on pure Monomers
- hydrogenated hydrocarbon resins functional hydrocarbon resins and natural resins.
- reactive resins are added to the thermoplastic and / or the blend.
- a very preferred group of reactive resins includes epoxy resins.
- the molecular weight of the epoxy resins preferably varies from 100 g / mol to at most 10,000 g / mol for polymeric epoxy resins.
- the epoxy resins include, for example, a reaction product of bisphenol A and epichlorohydrin, a reaction product of phenol and formaldehyde (novolak resins) and epichlorohydrin, glycidyl esters, and / or a reaction product of epichlorohydrin and p-amino phenol.
- Preferred commercially available resins and / or educts for making the resins include, but are not limited to, Araldite TM 6010, CY-281 TM, ECN TM 1273, ECN TM 1280, MY 720, RD-2 from Ciba Geigy, DER TM 331, THE TM 732, THE TM 736, THE TM 432, THE TM 438, THE TM 485 from Dow Chemical, Epon TM 812, 825, 826, 828, 830, 834, 836, 871, 872,1001, 1004, 1031 etc. from Shell Chemical and HPT TM 1071, HPT TM 1079 also from Shell Chemical.
- Exemplified commercially available aliphatic epoxy resins are e.g. Vinylcyclohexane dioxides such as ERL-4206, ERL-4221, ERL 4201, ERL-4289 or ERL-0400 from Union Carbide Corp.
- novolak resins e.g. Epi-Rez TM 5132 from Celanese, ESCN-001 from Sumitomo Chemical, CY-281 from Ciba Geigy, DEN TM 431, DEN TM 438, Quatrex 5010 from Dow Chemical, RE 305S from Nippon Kayaku, Epiclon TM N673 from DaiNipon Ink Chemistry or Epicote TM 152 from Shell Chemical.
- reactive resins and melamine resins can be used as reactive resins and melamine resins, such. Cymel TM 327 and 323 from Cytec.
- reactive resins it is also possible to use terpene-phenolic resins, e.g. Use NIREZ TM 2019 from Arizona Chemical.
- reactive resins may also be phenolic resins, e.g. YP 50 from Toto Kasei, PKHC from Union Carbide Corp. And BKR 2620 from Showa Union Gosei Corp. deploy. It is also possible to use reactive resins based on polyisocyanates, such as, for example, Coronate TM L from Nippon Polyurethane Ind., Desmodur TM N3300 or Mondur TM 489 from Bayer.
- fillers such as fibers, carbon black, zinc oxide, titanium dioxide, chalk, solid or hollow glass spheres, microspheres made of other materials, Silicic acid, silicates; or nucleating agents, blowing agents, compounding agents, adjuvants and / or anti-aging agents, for example in the form of primary and secondary antioxidants or in the form of light stabilizers.
- the fillers are preferably added before or during the extrusion, in particular the thermoplastic and / or the blend. For example, prior to the extrusion, mixing can take place in a twin-screw extruder.
- the coating in particular the production of the flat adhesive, takes place from the melt.
- the coating in particular the production of the flat adhesive, takes place from the melt.
- a mixing beforehand This mixing can be done for example in a twin-screw extruder or kneader.
- a single-screw extruder is generally sufficient.
- the extrudate is gradually heated to the extrusion temperature, ie liquefied in the heating process. The temperature selection is based on the melt flow index of the thermoplastic.
- the thermoplastic heat-activable surface adhesive in particular as an adhesive film, can already be pre-oriented in the nozzle. This process is influenced by the nozzle design within the coating die. After the nozzle exit, the stretching process can take place at the nozzle exit. The stretching process or the stretching causes the stretching of the flat adhesive to form the stretched, flat adhesive.
- the stretching ratio can be controlled, for example, by the width of the die gap.
- the stretched, sheeted adhesive is placed on a substrate to be coated to form a stretched, sheeted adhesive with backing.
- an extrusion die is preferably used.
- the extrusion dies used can come from one of the following three categories: T-die, fishtail die and stirrup nozzle. The individual types differ in the shape of their flow channel. These forms of the extrusion nozzle can be used to create an orientation within the hotmelt adhesive. In the event that two-layer or multi-layer thermoplastic heat-activatable films are to be produced, coextrusion nozzles can also be used.
- a carrier with a stirrup nozzle, in particular to form a flat, preferably stretched, adhesive in such a way that a heat-activatable, stretched, flat adhesive forms as a film layer on the temporary carrier by a relative movement from nozzle to carrier.
- the two-dimensional adhesive in particular the hot-melt adhesive film, is stretched by at least a factor of 3, preferably by a factor of 5.
- the extrudate is pressed through a slot die and then drawn off on one or more take-off rolls.
- the take-off rolls are also used to cool the extrudate to the desired temperature.
- the sheet-like adhesive thus obtained in particular in the form of a film, is then stretched longitudinally to the extrusion direction, which leads to an orientation of the polymer chains.
- the longitudinal stretching is conveniently carried out with the aid of two or more different high-speed rolls.
- the rollers for stretching can be heated differently.
- the temperature should be at least 30% below the extrusion temperature. In the event that no non-stick rolls are used, the temperature of the rolls should preferably be below the sticking temperature of the heat-activatable film.
- the heat-activatable, stretched, flat adhesive in particular as a film
- a carrier This can be, for example, a release film or a release paper.
- the heat-activatable adhesive in particular as a film, to be applied electrostatically.
- the heat-activatable film can also be deposited on a single-sided pressure-sensitive adhesive tape.
- the adhesion of the pressure-sensitive adhesive and the flat adhesive should not be very pronounced.
- the pressure-sensitive adhesive should be reversibly detachable from the heat-activatable film both at room temperature and at elevated temperatures.
- the flat, unstretched adhesive in particular a non-stretched or oriented heat-activatable film
- the stretching in the longitudinal direction takes place from the composite of the release film and the heat-activatable film.
- the release film and the heat-activatable, flat adhesive in particular the heat-activatable film, have a similar thermal behavior in order to avoid stresses.
- the release film should be equipped with a flexible release layer so that it does not break during the drawing process.
- thermoplastic heat-activated stretched, flat adhesive without temporary carrier for example in the form of a film or a film, in particular a layer thickness of 10 to 500 .mu.m, preferably from 25 to 250 .mu.m.
- thermoplastic heat-activatable flat or stretched flat adhesives in particular as a film, with two adhesive layers which are connected via a primer layer / barrier layer / carrier.
- the layer thickness of the primer layer / barrier layer / carrier is in a preferred design between 0.5 and 100 microns.
- carrier material for example for the construction of primer / barrier layer / carrier, it is generally possible to use all conventional materials which are familiar to the person skilled in the art for this purpose, but these are, for example, not restrictive: films, in particular of polyester, PET, PE, PP, BOPP, PVC, polyimide, polymethacrylate, PEN, PVB, PVF, polyamide; or also nonwovens, foams, fabrics and fabric films which may also be based on these materials.
- polymeric or prepolymeric compounds which are familiar and suitable to the person skilled in the art, in particular compounds having carboxylic acid groups themselves.
- exemplary and suitable polymers are polyurethanes, polyurethane / acrylate copolymers, copolymers or terpolymers of polyalkylenes, polyalkyldienes, polyacrylate esters, polyalkyl esters, polyvinyl esters, polyvinyls with acrylic acid or methacrylic acid.
- copolymers such as polymers based on polyethylene / acrylic acid copolymer, polyethylene / methacrylic acid copolymer, polyethylene / methacrylic acid / acrylic acid terpolymer, methyl methacrylate / acrylic acid copolymers, polybutadiene / methacrylic acid copolymers, vinyl chloride / acrylic acid copolymers, and / or mixtures thereof.
- Preferred polymers and / or copolymers used are based on polyurethanes, polyethylene / acrylic acid copolymer and / or polyethylene / methacrylic acid copolymer.
- the properties of the polymers and / or copolymers can be varied by the choice of the number of carboxylic acid groups.
- the primers may have reactive groups, in particular further reactive groups.
- Crosslinking compounds for the respective blends preferably have multifunctional groups or the compound is multifunctional. Multifunctional in this context means that the compounds have a functionality greater than or equal to 2.
- Suitable crosslinkers include, but are not exhaustive, polyfunctional aziridines, multifunctional carbodiimides, multifunctional epoxies, and melamine resins.
- the preferred crosslinkers are polyfunctional aziridines, e.g. Trimethylpropane tris- (B- (N-aziridinyl) propionate, pentaerythritol tris- (B-
- primers with hydroxy groups or amine groups can be used.
- Binders can be added to adjust the solidification.
- Liquid binders can be dissolved in water or dissolved in at least one organic solvent or a mixture of solvents or an aqueous mixture and / or applied as a dispersion.
- Bonding dispersions are predominantly selected for adhesive bonding: these are, for example but not limited to, thermosets in the form of phenolic or melamine resin dispersions, elastomers as dispersions of natural or synthetic rubbers or usually dispersions of thermoplastics such as acrylates, vinyl acetates, polyurethanes, styrene-butadiene systems, PVC and others and their copolymers.
- anionic or non-ionogenically stabilized dispersions are used, but in special cases, cationic dispersions may also be advantageous.
- thermoplastic heat-activated stretched, flat adhesive or the sheet adhesive in particular as a film or film
- temporary carrier materials for the thermoplastic heat-activated stretched, flat adhesive or the sheet adhesive in particular as a film or film
- films for example based on polyester, PET, PE, PP, BOPP, PVC Polyimide; or nonwovens, foams, woven and nonwoven sheets, which may also be based on said polymers, and release paper based on glassine, HDPE and / or LDPE.
- the support materials are equipped with a release layer.
- the release layer has a silicone release varnish or a fluorinated release varnish; the release layer preferably consists of at least one of these varnishes.
- thermoplastic heat-activated stretched, sheet-like adhesive or the sheet-like adhesive in particular as a film, can be equipped in a further embodiment not only with a temporary carrier material but also with two temporary carrier materials.
- This form of double release liner can be advantageous for the production of diecuts.
- the invention also provides the use of a stretched, flat adhesive for bonding metal-containing bodies, in particular of metals, alloys or also corresponding surface-modified metal-containing bodies, of bodies based on polymeric organic compounds; in particular of plastics; of glass bodies and / or a bonding of at least two of said bodies of different or the same materials, in particular using heat during the bonding process, is preferred with additional application of pressure.
- metal-containing bodies can be bonded to metals, to plastics and / or glass bodies, or to a plastic with a plastic and / or a glass body, or the glass body to a glass body, in particular by application of heat and optionally by application of pressure during the bonding process ,
- a metal-containing body with a body based on plastic, a glass body and / or a metal-containing body, in particular using heat and optionally under pressure, are bonded during the bonding process.
- the invention also relates to the bonding of glass bodies, the bonding of bodies based on plastics or else the bonding of a glass body to a body based on a plastic.
- the stretched, flat adhesives are used for the bonding of components, in particular of consumer electronic consumer goods.
- components in particular of consumer electronic consumer goods.
- metals can be bonded to the heat-activated stretched, flat adhesives according to the invention.
- all metals, alloys or metal-containing bodies, with and without surface modification can be bonded to the heat-activated, stretched adhesives.
- the adhesive is in the form of a film or a film.
- Exemplified metals include metals or alloys containing iron or aluminum or magnesium or zinc.
- steels, stainless steels or austenitic alloys can be bonded.
- the metals can have customary additives and / or be present as an alloy, for example iron can be bonded with customary additives and / or as an alloy with the adhesive according to the invention.
- the stainless steels can be brushed, or provided with a protective lacquer or color coat.
- Further customary surface modifications are anodizations, chromations, chromitization or chromating.
- metallizations come into consideration, for example for the passivation of the surfaces. This is usually done with gold or silver, which are applied in particular as a coating. Other surface modifications may be due to the oxidation of the metallic surface.
- multi-layer metals can be used.
- the metal parts or parts that are to be bonded may generally be any size and / or shape, such as flat, for example, as films, films, sheets, such as a stamped or laser formed; or be formed in three dimensions.
- the applications of the parts to be bonded or bonded metal parts or metal-containing parts are not limited, they can be used as a decorative element, as stiffening support, frame components, covers, as an information carrier, hanger, component, etc.
- plastic parts or parts based or containing at least one plastic are generally all conventional, substantially solid plastics, into consideration.
- the plastic parts are usually based on extrudable plastics.
- Preferred components to be bonded are based on extrudable plastics, such as ABS, PC, ABS / PC blends, polyamides, glass fiber reinforced polyamides, polyvinyl chloride, polyvinyl fluoride, cellulose acetate, cycloolefin copolymers, liquid crystal polymers (LCP), polylactide,
- Polyether ketones Polyetherimide, polyethersulfone, polymethacrylmethylimide, polynmethylpentene, polyphenyl ether, polyphenylene sulfide, polyphthalamide, polyurethanes, polyvinyl acetate, styrene, acrylonitrile copolymers, polyacrylates or polymethacrylates, polyoxymethylene, acrylic esters, styrene-acrylic copolymers, polyethylene, polystyrene, polypropylene or polyester,
- PBT PET
- the components may take any shape required for the manufacture of a consumer electronic equipment component or housing. In the simplest form they are planar, for example as a plate, film, foil, for example in the form of a stamped product. Furthermore, but also 3-dimensional components are quite common. The components can also assume a variety of functions, such as housing or viewing window, or stiffening elements, etc.
- an object of the invention is the use of a flat, stretched adhesive, preferably a diecut from a stretched thermoplastic adhesive, in particular according to the above, for the bonding of components, comprising the steps of
- a component to be bonded in particular a first component, more preferably on a metal-containing component, preferably also on a component containing plastic and / or glass,
- the composite is isolated and sold separately, for example, to processors, or it takes place
- cooling and optionally removal of the bonded component or the bonded components from the molded part, optionally, before or after cooling.
- the resulting composite of stamped product and first component can be isolated and optionally sold separately; alternatively, the composite can be used further directly or further processed.
- the subject matter of the invention may also be a method with the abovementioned steps, in particular a method in which the stretched, flat adhesive obtained according to the method steps, which is optionally provided with at least one carrier, is further processed according to the above-described use.
- the above positioning of the stamped product is carried out on the component to be bonded by the component is provided with a molded part whose contact surface corresponds to the contour of the component in the sense of a negative mold and / or the molding guide pins for positioning a stamped and / or wherein for positioning the composite on the component to be bonded, the component is provided with a molded part, the contact surface corresponds to the contour of the component in the sense of a negative mold and / or the composite is fixed with a corresponding molding.
- stamped blanks of the thermoplastic heat-activated stretched, flat adhesive preferably in the form of a film or a film
- These are usually by laser cutting, or by Flat bed stamping or by rotary die cutting.
- the diecut can be placed manually on the metal part, for example by means of tweezers.
- the stamped usually has the dimension of the metal part, but it can also be made slightly smaller to compensate for slight Ausquetschpreheate, processes during the bonding process. This does not lead to visually undesirable visible oozing. Alternatively, it may be necessary for structural reasons to use full-surface diecuts.
- thermoplastic heat-activatable adhesive tape diecut comprising a stretched, flat adhesive
- a heat source after manual positioning; this can be done, for example, with an iron in the simplest case.
- the adhesive becomes sticky or sticky and the adhesion to the metal increases.
- a punched product equipped with a temporary carrier material is preferably used.
- the metal part may be placed on the heat activated adhesive tape diecut.
- the placement of the diecut is done with the unsupported, especially open side of the adhesive.
- On the back of the diecut is preferably still a temporary carrier material.
- heat, in particular by the metal introduced into the thermoplastic heat-activable planar adhesive, for example in the form of an adhesive tape.
- the adhesive tape becomes tacky and adheres more strongly to the metal than to the release liner.
- the use according to the invention is based on the fact that heat is introduced through the metal component and / or through the stamped product.
- the amount of heat must be accurately metered, especially to substantially maintain the orientation of the thermoplastic in the adhesive during prelamination.
- the amount of heat must be well dosed and the temperature reached should be at most 10 0 C above the temperature required to secure adherence of the adhesive, in particular the film to the component, preferably a metal component guarantee.
- the prelamination temperature should not exceed the onset temperature of the crystallite melting range as measured by DSC.
- a heating press is used in a preferred embodiment.
- the stamp of the heating press can be made for example of aluminum, brass or bronze and usually has the outer shape or contour of the component, preferably of the metal part. Therefore, the stamp can also be referred to as a molded part.
- the stamp may have formations in order to avoid a possible, partial heat damage.
- both pressure and the heat, in particular to set a certain temperature are introduced as evenly as possible.
- the person skilled in the art knows that in each case pressure, temperature and / or time have to be adapted to the respective concrete situation, depending on the particular materials to be bonded.
- a molded part is preferably used, which assumes the shape of the underside of the metal part.
- the molding has a kind of negative mold to the shape of the component or a part of the component (positive mold).
- locking means such as pins and / or pins, can be used, which assume the positioning with defined holes, for example in the temporary carrier material of the adhesive, in particular in the form of an adhesive tape.
- the component preferably the metal part
- the component can be removed from the molded part with laminated adhesive tape.
- the above-described use can be transferred manually, automatically, both discontinuously or continuously into a process, for example in an automated process.
- the further use of the resulting composite can be done in a direct or indirect re-use, also referred to as a bonding process.
- This further use or the subsequent bonding process between the composite, and the second component, wherein the composite comprises the stamped product and the first component, in particular the composite metal part with stamped article, is described in detail below by the use or the further processing according to at least one of the steps 1 to 6 described:
- the composite in particular comprising a metal component with a stamped sheet of heat-activable laminar adhesive, such as a film, on the second component, preferably on a plastic component, glass component and / or metal component,
- the invention is not limited to the bonding of metal and plastic components.
- metal components can be glued to one another or to one another with glass components or even glass components.
- plastic parts are glued together. It is clear to the person skilled in the art that, for example, different alloys, glasses or plastics can each have a different chemical composition.
- the bonded metals may also have the same or a different chemical composition.
- the mold component used to hold the components should also be made of heat-resistant material.
- Corresponding materials are, for example, metals or alloys of metals.
- plastics or suitable composite materials for example fluorinated polymers or thermosets, which at the same time have a good hardness and are difficult to deform.
- pressure and temperature are applied. This is done by means of a Schustkovs of a material with good thermal conductivity. Common materials include copper, brass, bronze or aluminum. But it can also be used other alloys.
- the hot stamping die should preferably assume the shape of the upper side of the metal part, for example in the form of a negative mold.
- This shape can be present as 2-dimensional or 3-dimensional.
- the pressure is applied by means of a printing cylinder.
- the application does not necessarily have to be done via air pressure.
- the hot stamping dies do not all have to be operated at the same temperature and / or pressure.
- the temperature and / or the pressure may initially increase and, if appropriate, subsequently decrease again.
- the contact time of the stamp can be chosen differently.
- it may be advantageous, in a last step to apply only pressure with a non-tempered stamp or, for example, with a cooled stamp, for example a press die cooled to room temperature.
- the thermoplastic heat-activated stretched sheet adhesive in step 4, has a reduced squeezing behavior than a corresponding non-stretched adhesive.
- the Ausquetsch the adhesive according to the invention is, with otherwise substantially the same, preferably under identical process parameters, such as temperature, pressure and / or time, by 2 to 25%, in particular reduced by at least 10%, preferably by at least 20% or reduced, in particular Reference to extruded, corresponding non-stretched thermoplastics or laminar adhesives.
- the adhesive Due to the presence of crystalline components in the thermoplastic heat-activatable laminar adhesive, for example the film, the adhesive is harder and more dimensionally stable than a suitably untreated adhesive.
- the tension through the stretching process is not preserved, as it is for elastic or viscoelastic Materials is common, since with the stretching of the thermoplastic, heat-activatable film is accompanied by a cold deformation.
- a stamped product according to the invention has a reduced squeezing behavior due to the orientation of the thermoplastic heat-activable sheet-like adhesive formed and / or frozen in the production process, which is present in particular in the form of a film.
- the heat input is chosen to be as low as possible, preferably at room temperature, so that the orientation introduced for the bonding step in the production process, in particular by the orientation, is substantially retained.
- the bonding step a part of the introduced heat is now not only absorbed during the bonding, but can also be consumed for a regression of the orientation and / or melting processes.
- the stamped product according to the invention has a reduced Ausquetsch by the formed and frozen in the manufacturing orientations of the thermoplastic heat activated stretched, flat adhesive, which regress by the temperature increase during the Verklebungsitzes, this counteracts squeezing and thermal expansion.
- the stamped body retains improved dimensional stability during bonding. This is especially true in the bonding of visible components, such as decorative elements, since otherwise adhesive residues are visible at unwanted locations.
- the stamped bodies of the heat-activatable films according to the invention having a reduced squeezing behavior, the diecut shape, in particular the area, can be selected to be larger, and the geometry of the diecuts can also be changed since less space is required for unwanted material leakage. Therefore, it is also possible to dispense with the disruption within the diecuts often provided in these systems or with constructive solutions on the components, joining parts themselves, which are provided for receiving the unwanted adhesive leakage.
- thermoplastic heat-activated stretched sheet adhesive in particular in the form of a film, is determined by the squeezing test set forth in the experimental section. After this test, the squeezing rate is determined under standard conditions.
- the crystalline regions (b) Due to the heat input during the bonding step, in addition to a regression of the orientation (a), the crystalline regions (b) also melt and it is also possible for the phase of the water (c) contained in the thermoplastic film to change.
- the water (c) may occur as water vapor due to the introduced high temperatures and may then cause bubbling within the film. This blistering usually has a significant negative impact on the strength of the adhesive bond.
- the inventive semi-crystalline thermoplastic heat-activated stretched, sheet-like adhesives have an increased crystalline content and / or an increased proportion of oriented polymers due to the stretching compared to correspondingly untreated adhesives.
- This increased crystallinity and / or increased orientation of the polymers is associated with a reduced water retention.
- water is incorporated to a greater extent in amorphous regions of the polymers. This is usually done by adsorption from the ambient air.
- the stretched adhesives in addition to the improved bonding properties, such as reduced squeezing behavior and / or reduced blistering due to reduced water absorption, also have improved storage stability, because the reduced water absorption is reduced to a reduction in degradation reactions, for example by hydrolysis, in the polymer.
- the cooling step, step 5 represents an optional step that can serve to optimize bonding performance. In addition, it allows a simpler or faster removal of the bonded components.
- a metallic press die used, the shape of which is analogous to the Schupressstempel and contains no heating element, usually the press die is not actively tempered, in particular he works at room temperature.
- the press die can also be actively cooled, for example by a cooling system, by means of cooling means, such as air or cooling liquids. Then the ram can actively extract heat from the components.
- the Schupressstempel for Prelaminians and bonding are operated in a temperature range of 60 to 300 0 C, depending on the temperature stability of the components and the activation and / or melting temperature of the thermoplastic heat-activated stretched, sheet-like adhesive, in particular as a film. Usual process times amount to 2.5 to 15 sec per punching step. Furthermore, it may also be necessary to vary the pressure. Due to very high pressures, the thermoplastic heat-activatable film can increasingly squeeze despite the inventive properties. Suitable pressures are in particular 1.5 to 10 bar, calculated on the bond area. Again, the stability of the materials and the flow behavior of the thermoplastic heat-activatable adhesive, in particular the film, a great influence on the particular pressure to be selected. The skilled worker is familiar with how he tunes the respective process parameters, such as time, pressure and / or temperature to the particular thermoplastic adhesive and components used.
- FIG. 1 shows schematically the test method for verifying the Verklebefestmaschine
- FIG. 2 shows schematically the test for measuring the bond strength.
- Test Methods Bonding Resistance A) The bond strength is determined by a dynamic shear test. The bond area is 2 cm 2 . A 1.5 mm thick Al plate with a width of 2 cm is connected to a polycarbonate plate (PC plate) with a width of 2 cm and a layer thickness of 3 mm by means of a thermoplastic heat-activatable film according to the invention. The thermoplastic heat-activatable film was examined both in the stretched state - stretched, flat adhesive - as well as in the unrestrained state - unstretched, flat adhesive. All samples were acclimated for a further 14 days at 23 ° C and 50% humidity after coating or after stretching.
- a 100 micron thick thermoplastic heat-activatable film is laminated using a hot 1 10 0 C hot plate on aluminum. Subsequently, the release film is peeled off. The bonding of the test specimens is carried out in a heating press (see Fig. 1), being heated over the metal 1, so the aluminum side. The heat activation is carried out with a 150 0 C hot Schupressstkov 4 at a pressure 5 of 5 bar and 5 s Verpressdauer.
- the quality of the bond such as the appearance of bubbles, can be assessed by the transparent polycarbonate.
- test specimens are torn apart with a tensile testing machine, shown in Figure 2, with 10 mm / min using the slowly increasing force F, shown in Figure 2 by the reference numeral 0.
- the measured unit is given in N / mm 2 and is the maximum force that is measured to separate the test specimens (aluminum and polycarbonate). The measurement is carried out at 23 ° C, 50% humidity.
- thermoplastic heat-activatable film is punched out as a circular punched product with a diameter of 29.5 mm.
- the film is covered from both the top and bottom with a siliconized glassine liner.
- this composite is placed in a hot press and then applied with 75 N / cm 2 and 150 0 C pressure (temperature of the hot press, heated on both sides) for 10 seconds. Due to the application of pressure, the thermoplastic squeezes out in a circular shape.
- the Ausquetsch rate is through OR
- OR squeezing rate
- Area a fter the area of the thermoplastic after the heating press
- Area m itiai the area of the thermoplastic in front of the heating press.
- thermoplastic heat-activatable film is punched out as a circular diecut with a diameter of 50 mm.
- the film is covered from the bottom with a siliconized glassine liner.
- this composite is placed in a climate chamber with 60 0 C and 95% humidity. The sample is left there for 24 h.
- the moisture absorption is determined gravimetrically. It is determined according to the following formula, the water absorption,
- the measurement of the heat of fusion was performed with the aid of Differential Scanning Calorimetry (DSC) on a Mettler DSC 822.
- the heating rate was 10 0 C / min and it was the first heating curve in the range of -100 ° C to + 250 0 C evaluated.
- the sample was weighed into a perforated 40 ⁇ l aluminum crucible. The Sample weight was between 10 and 15 mg.
- the integral is formed above the melting peak and divided by the sample weight. The enthalpy of fusion is thus given in J / g.
- the percent changes by the stretching process are simply determined by measuring the difference between the unstretched and the stretched sample.
- the melting peak extends over a wide range. In each case the range between onset and offset temperature was evaluated. This is the area where the deviation of the DSC curve from the baseline occurs.
- thermoplastic heat-activatable film was stretched at 23 ° C to a length of about 25 cm.
- the same process was carried out at 105 0 C, wherein the film was cooled immediately after stretching abruptly to room temperature to fix the orientation.
- the stretching ratio between initial length and change in length (L: ⁇ L) was thus about 1: 4.
- the film thickness was about 100 ⁇ m; the starting film thickness was about 500 ⁇ m.
- Dynapol TM S1227 From Degussa was pressed between two sheets of siliconized glassine release paper at 140 0 C to 100 microns. The melting range of the copolyester is between 86 ° C and 109 0 C.
- Dynapol TM S1247 From Degussa was pressed to 100 .mu.m siliconized between two layers of glassine release paper at 140 0 C. The melting range of the copolyester is between 100 ° C and 135 ° C.
- EMS Grilltech was pressed between two sheets of siliconized glassine release paper at 140 0 C to 100 microns.
- the melting range of the polymer is between 93 ° C and 121 ° C.
- Examples 1, 2 and 3 are examples of copolyester films which can be used as a heat-activatable film for the bonding of metal parts.
- the films were melted in a hot press and pressed to a layer thickness of 100 microns. Due to the pressing process in the melt and the slow cooling, no orientation phenomena occur.
- the subsequent stretching process was carried out at 23 ° C and 105 0 C with sudden cooling.
- the samples were then in the disgusted state, and in the conditions in accordance with the test method D.
- the layer thickness of the films investigated was about 100 ⁇ m in each case.
- the stretched films were extruded to 500 microns and then stretched to 100 microns. This does not lead to unwanted, visible squeezing out of the glue joint.
- Table 1 The results are shown in Table 1.
- Table 1 shows that the selected thermoplastic heat-activatable films can be oriented by a strong elongation and increases the proportion and / or the size of the crystalline portions. The effect is more pronounced in the cold-stretching at 23 ° C than the stretching in the heat (at 105 0 C). The measured values prove that an increase of the enthalpy of fusion by nearly 100% is possible.
- Table 4 shows that the bond strength is hardly affected. The measured values are within the measurement variations of the test method. Thus, property improvements can be achieved by the Extend process achieve the same adhesive properties. Evaluation of the number of bubbles in the bond area revealed that the disgusted Examples 1 to 3 had significantly more bubbles in the bond area than the comparative Examples also tested.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Laminated Bodies (AREA)
- Adhesive Tapes (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09782188A EP2285926A1 (de) | 2008-12-05 | 2009-08-26 | Verstreckte thermoplaste zur verklebung von metallteilen auf kunststoffen, gläsern und metallen und verfahren zu ihrer herstellung |
CN2009801271258A CN102089397A (zh) | 2008-12-05 | 2009-08-26 | 用于将金属部件粘合至塑料,玻璃和金属的拉伸的热塑性树脂,及其生产方法 |
JP2011538912A JP2012511066A (ja) | 2008-12-05 | 2009-08-26 | 金属部品をプラスチック、ガラス、および金属に貼り付けるための延伸熱可塑性物質ならびにその製造方法 |
US12/996,960 US20120003468A1 (en) | 2008-12-05 | 2009-08-26 | Stretched Thermoplastic Resin for Gluing Metal Parts to Plastics, Glass and Metals, and Method for the Production Thereof |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008060415A DE102008060415A1 (de) | 2008-12-05 | 2008-12-05 | Verstreckte Thermoplaste zur Verklebung von Metallteilen auf Kunststoffen, Gläsern und Metallen und Verfahren zu ihrer Herstellung |
DE102008060415.1 | 2008-12-05 | ||
DE200910014387 DE102009014387A1 (de) | 2009-03-26 | 2009-03-26 | Verfahren zur Fixierung von Metallteilen auf Kunststoffen mit hitzeaktivierbaren, flächigen Haftmitteln, insbesondere mit hitzeaktivierbaren Folien |
DE102009014387.4 | 2009-03-26 |
Publications (1)
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WO2010063498A1 true WO2010063498A1 (de) | 2010-06-10 |
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ID=41168445
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/EP2009/060964 WO2010063498A1 (de) | 2008-12-05 | 2009-08-26 | Verstreckte thermoplaste zur verklebung von metallteilen auf kunststoffen, gläsern und metallen und verfahren zu ihrer herstellung |
Country Status (7)
Country | Link |
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US (1) | US20120003468A1 (de) |
EP (1) | EP2285926A1 (de) |
JP (1) | JP2012511066A (de) |
KR (1) | KR20110097611A (de) |
CN (1) | CN102089397A (de) |
TW (1) | TW201022396A (de) |
WO (1) | WO2010063498A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
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US8899318B1 (en) | 2014-04-24 | 2014-12-02 | Ronald C. Parsons | Applying an aggregate to expandable tubular |
TWI667758B (zh) | 2014-11-03 | 2019-08-01 | 國立成功大學 | 電性連接結構及其製備方法 |
KR20170092652A (ko) | 2014-12-08 | 2017-08-11 | 쓰리엠 이노베이티브 프로퍼티즈 캄파니 | 아크릴 폴리비닐 아세탈 필름 및 조성물 |
WO2016094280A1 (en) | 2014-12-08 | 2016-06-16 | 3M Innovative Properties Company | Acrylic polyvinyl acetal films, composition, and heat bondable articles |
WO2017112453A2 (en) | 2015-12-22 | 2017-06-29 | 3M Innovative Properties Company | Acrylic polyvinyl acetal films comprising a second layer |
WO2017112537A1 (en) | 2015-12-22 | 2017-06-29 | 3M Innovative Properties Company | Acrylic polyvinyl acetal films comprising an adhesive layer |
JP6920303B2 (ja) | 2015-12-22 | 2021-08-18 | スリーエム イノベイティブ プロパティズ カンパニー | 構造化層を備えたアクリルフィルム |
US10493738B2 (en) | 2015-12-22 | 2019-12-03 | 3M Innovative Properties Company | Acrylic polyvinyl acetal graphic films |
CN109313292B (zh) | 2016-06-07 | 2021-07-16 | 3M创新有限公司 | 用于光定向制品的丙烯酸聚乙烯醇缩醛膜 |
PL422884A1 (pl) * | 2017-09-18 | 2019-03-25 | Uniwersytet Technologiczno-Przyrodniczy im. Jana i Jędrzeja Śniadeckich w Bydgoszczy | Sposób i próbka do badań połączeń klejonych materiałów o różnych właściwościach fizycznych |
PL131221U1 (pl) * | 2017-09-18 | 2023-07-31 | Politechnika Bydgoska Im. Jana I Jędrzeja Śniadeckich W Bydgoszczy | Próbka do badania trwałości połączeń klejonych materiałów o różnych właściwościach fizycznych |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5733615A (en) * | 1991-09-09 | 1998-03-31 | Avery Dennison Corporation | In-mold label film and method |
US5849419A (en) * | 1993-07-16 | 1998-12-15 | Avery Dennison Corporation | Uniaxially oriented label film with compatibilizer |
WO2004098868A2 (en) * | 2003-05-01 | 2004-11-18 | Avery Dennison Corporation | Multilayered film |
-
2009
- 2009-08-26 KR KR1020107027885A patent/KR20110097611A/ko not_active Application Discontinuation
- 2009-08-26 US US12/996,960 patent/US20120003468A1/en not_active Abandoned
- 2009-08-26 EP EP09782188A patent/EP2285926A1/de not_active Withdrawn
- 2009-08-26 JP JP2011538912A patent/JP2012511066A/ja not_active Withdrawn
- 2009-08-26 WO PCT/EP2009/060964 patent/WO2010063498A1/de active Application Filing
- 2009-08-26 CN CN2009801271258A patent/CN102089397A/zh active Pending
- 2009-10-07 TW TW098133921A patent/TW201022396A/zh unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5733615A (en) * | 1991-09-09 | 1998-03-31 | Avery Dennison Corporation | In-mold label film and method |
US5849419A (en) * | 1993-07-16 | 1998-12-15 | Avery Dennison Corporation | Uniaxially oriented label film with compatibilizer |
WO2004098868A2 (en) * | 2003-05-01 | 2004-11-18 | Avery Dennison Corporation | Multilayered film |
Also Published As
Publication number | Publication date |
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US20120003468A1 (en) | 2012-01-05 |
EP2285926A1 (de) | 2011-02-23 |
JP2012511066A (ja) | 2012-05-17 |
TW201022396A (en) | 2010-06-16 |
KR20110097611A (ko) | 2011-08-31 |
CN102089397A (zh) | 2011-06-08 |
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