Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J7/00—Adhesives in the form of films or foils
  • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
• • 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
  • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
  • C09J133/04—Homopolymers or copolymers of esters
• • 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
  • C09J2301/00—Additional features of adhesives in the form of films or foils
  • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
  • C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J2433/00—Presence of (meth)acrylic polymer
• • 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
  • C09J2453/00—Presence of block copolymer
• • 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
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]

Definitions

• the invention relates to an adhesive film with restoring properties and to punched products which are produced with such an adhesive film.
• Front plates with inscriptions and functional plates for electronic and other devices are industrially glued in large quantities on double-sided adhesive tapes to housings or other substrates.
• the adhesive tape made of roll or bale material is brought into the desired shape with the aid of punches. At the punched edges, however, the adhesives tend to flow together again since there are no forces to pull back from the punched edges. This applies particularly if the punched shaped surfaces are not removed immediately, but only at a later point in time, which is particularly the case with manual processing.
• the documents DE 101 57 152 A1 and 101 57 153 A1 describe processes for the production of pressure-sensitive adhesive stamped products by means of such pressure-sensitive adhesives.
• adhesive compositions with coating nozzles are applied to a carrier in the stretched state.
• the elastic retraction forces of the adhesives cause them to withdraw the processing of punching and cutting edges, thereby reducing a reduction in backflow resulting in the undesirable re-bonding.
• the adhesive is only stretched in the machine direction during manufacture, so that the desired effect can only be observed with punching or cutting edges transverse to the direction of travel.
• punching or cutting edges in the longitudinal direction there is a tendency to re-glue just like with conventional adhesive tapes.
• the object of the invention is to provide adhesive films which have improved processing properties, in particular in punching processes, compared to the prior art, in which the punching or cutting edges do not stick together again, particularly during or after a punching or cutting process, and which have the advantageous properties over a sufficiently long period of time.
• the task is solved by adhesive films as set out in the main claim.
• the subclaims relate to advantageous embodiments of these adhesive films and to stamped products produced with such adhesive films.
• the main claim describes an adhesive film, in particular for use in a stamping process, consisting of at least one carrier and one
• foils is to be understood as a general term for flat structures of all kinds and thus also includes two-dimensionally flat (e.g. roll goods, bale goods) and elongated (e.g. adhesive tapes) structures. Also includes its two-dimensionally limited extent
• the resetting behavior can be generated in that the adhesive film is mechanically kept in the tensioned state, for example in that the adhesive film continues to have a release liner (non-stick film, release film), the mechanical stiffness of which is greater than that of the carrier material. Due to the mechanical properties of the carrier and those of the release liner, the tensions can be maintained over a long period.
• release liner non-stick film, release film
• the mechanically tensioned state can also be frozen, in particular insofar as the film has a reset behavior due to the supply of energy.
• An advantageous embodiment of the adhesive film is characterized in that a shrink film is used as the carrier material.
• Shrink films are cold-stretched thermoplastic films that contract back to their original state when heat-treated ("memory", "elastic shape memory”).
• the stretching process can also be carried out in the heat and the stretched film can then be brought to cool.
• shrink films are used as the carrier, the forces required to withdraw the carrier with the adhesive can be applied directly when punching or cutting by supplying energy, e.g. B. by heating.
• Advantageous adhesive films according to the invention are double-sided adhesive, so the carrier is coated on both sides with adhesive.
• a release liner is coated with an adhesive.
• the carrier is heated, causing it to expand longitudinally and crosswise to the web, and then, when hot, is laminated to the cold adhesive with the release liner on the other side, which creates a mechanical tension between the release liner as it cools and builds up the carrier.
• the mechanical see the stiffness of the release liner being greater than that of the wearer.
• a second mass layer is placed on the side of the carrier that is still open.
• Adequate web tension should always be available during production and further processing and the wrapping into bales or rolls should always be carried out in such a way that the carrier lies at the bottom in relation to the release liner, otherwise it can easily lead to cross folds with the release liner detached from of the first adhesive.
• a release liner is coated with an adhesive.
• a carrier with elastic properties is stretched in the longitudinal and transverse directions to the web run and in this state laminated to the adhesive with the release liner on the other side, which creates a mechanical tension between the release liner and the carrier.
• a release liner is coated with an adhesive
• a carrier with sufficient elastic properties is stretched in the longitudinal direction to the web run by the web tension and in this state is laminated to the adhesive with the release liner on the other side, which results in a mechanical tension builds up between the release liner and the carrier.
• the carrier with the adhesive does not retract in the direction of web travel with punching or cutting edges, but only with punching or cutting edges transverse to the web direction.
• a release liner is coated with an adhesive and a shrink film is used as the carrier, which is laminated onto the adhesive with the release liner on the other side.
• the adhesive tape is heated directly before the process, during the process or immediately afterwards, as a result of which the shrink film with the adhesive compositions is pulled back from the edges.
• the shrink film can also be subjected to heat during the production of the adhesive tape after the lamination, so that the same conditions arise here as in the case of the carrier stretched in the longitudinal and transverse directions mentioned above.
• An improved recovery behavior of the adhesive film can be achieved in that at least one adhesive has an elastic recovery behavior. In the case of double-sided adhesive films, both adhesives advantageously exhibit this behavior.
• Anisotropic adhesives are advantageously used as adhesives with their own resetting behavior.
• PSAs which contain at least one PSA based on at least one block copolymer, the total weight of the block copolymers accounting for at least 50% of the PSA, at least one block copolymer being based at least in part on (meth) acrylic acid derivatives, furthermore at least one block copolymer has at least the unit P (A) -P (B) -P (A) from at least one polymer block P (B) and at least two polymer blocks P (A) and where P (A) independently of one another homo- or copolymer blocks monomers a, the polymer blocks P (a) each having a softening temperature in the range of + 20 ⁇ C to + 175 ° C, P (B) represents a homopolymer or copolymer block of monomers B, the polymer block P (B) a Softening temperature in the range of - 130 ° C to + 10 ⁇ C, - the polymer blocks P (A) and P (B) are not homogeneously misc
• the invention furthermore relates to diecuts which are produced by punching an adhesive film as described above.

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=34706559

Family Applications (1)

Country Status (12)

Families Citing this family (4)

Family Cites Families (10)

• 2003
  • 2003-12-22 DE DE10361164A patent/DE10361164A1/de not_active Withdrawn
• 2004
  • 2004-11-16 TW TW093135079A patent/TW200526757A/zh unknown
  • 2004-11-24 JP JP2006544409A patent/JP2007515519A/ja active Pending
  • 2004-11-24 KR KR1020067013414A patent/KR20060123430A/ko not_active Withdrawn
  • 2004-11-24 MX MXPA06006707A patent/MXPA06006707A/es unknown
  • 2004-11-24 CN CNA2004800385367A patent/CN1898352A/zh active Pending
  • 2004-11-24 CA CA002551239A patent/CA2551239A1/en not_active Abandoned
  • 2004-11-24 AU AU2004303518A patent/AU2004303518A1/en not_active Abandoned
  • 2004-11-24 WO PCT/EP2004/053082 patent/WO2005061642A1/de not_active Ceased
  • 2004-11-24 EP EP04804565A patent/EP1699894A1/de not_active Withdrawn
  • 2004-11-24 US US10/583,752 patent/US20070254132A1/en not_active Abandoned
  • 2004-11-24 BR BRPI0417871-8A patent/BRPI0417871A/pt not_active Application Discontinuation

Non-Patent Citations (1)

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