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WO1992007041A1 - Adhesif sous forme de film - Google Patents

Adhesif sous forme de film Download PDF

Info

Publication number
WO1992007041A1
WO1992007041A1 PCT/GB1991/001626 GB9101626W WO9207041A1 WO 1992007041 A1 WO1992007041 A1 WO 1992007041A1 GB 9101626 W GB9101626 W GB 9101626W WO 9207041 A1 WO9207041 A1 WO 9207041A1
Authority
WO
WIPO (PCT)
Prior art keywords
adhesive
support material
film
structure according
adhesive film
Prior art date
Application number
PCT/GB1991/001626
Other languages
English (en)
Inventor
David Charles Summer
Original Assignee
R.A. Adhesive Products Limited
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 R.A. Adhesive Products Limited filed Critical R.A. Adhesive Products Limited
Priority to JP3515280A priority Critical patent/JPH06504299A/ja
Publication of WO1992007041A1 publication Critical patent/WO1992007041A1/fr
Priority to GB9306758A priority patent/GB2264243B/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • 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
    • C09J2301/18—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet characterized by perforations in the adhesive tape

Definitions

  • Adhesive in the form of a film Adhesive in the form of a film.
  • the present invention relates to adhesives and especially to the class of adhesives commonly called "transfer adhesives".
  • a transfer adhesive is a film of adhesive (which may incorporate random fibres as a filler) which is stored as a coating on a release paper. When placed in contact with another article, the film will preferentially adhere to the article, allowing the release paper to be removed to leave the adhesive film on the article. The tensile strength of the film is sufficiently low to allow the film to be broken by applying a longitudinal force to the film against the resistance provided by the adhesion of the film to an article.
  • transfer adhesives are supplied in rolls in which adhesive film is coiled between release paper. The transfer adhesive can be applied to an article by uncoiling the adhesive film and release paper to adhere the adhesive film to the article. The release paper is peeled from the film, either simultaneously or subsequently, to leave the film on the article.
  • Application can be performed by hand, or by using a hand-held applicator gun which contains a coil of adhesive and release paper.
  • a trigger when depressed allows the adhesive film to be drawn freely from the gun as the gun is drawn across the article.
  • the release paper is automatically removed from the adhesive film within the gun, and stored for subsequent disposal. If the trigger is released, no further adhesive film can leave the gun. Consequently, further movement of the gun across the article applies a force along the length of the adhesive film against the resistance provided by the adhesion of the film to the article, until the film breaks.
  • a significant disadvantage with this arrangement is that the adhesive film breaks unpredictably, so that a neat end to the adhesive film on the article is rarely produced. Furthermore, many adhesives suitable for use as transfer adhesives tend to "string", by stretching into fine strands of very great length before breaking at an unpredictable point. Thus, in addition to a ragged edge to the adhesive film, there may be strings of adhesive which are unsightly and may attract dirt or become adhered to other parts of the article or other articles.
  • the invention provides an adhesive structure comprising a film of adhesive, and support material embedded in the adhesive film, the adhesive material and the support material having a tensile strength in combination which is sufficiently low to allow the adhesive film and the support material to be broken together, in use, by applying a longitudinal force against the resistance provided by the adhesion of the film to an article, and wherein the support material has a regular structure which defines lines of relative weakness along which the support material will preferentially break, and the support material having a tensile strength which is sufficiently high to prevent the adhesive film stretching, whereby the adhesive film and support material will, in use, break together, along a weakness line defined in the support material.
  • the support material is an elongate strip, and the weakness lines run across the strip.
  • the weakness lines may run generally transversely.
  • the support material is preferably sufficiently strong to allow the strip to be longitudinally cut and separated without transverse stretching of the adhesive film.
  • the support material is preferably a perforate structure, providing weakness lines along lines of perforations.
  • the support material may be a net or net-like perforate structure.
  • the support material may be a net of synthetic plastics material.
  • the synthetic plastics material may comprise polyethylene, polystyrene or a combination thereof.
  • the adhesive is preferably thermoplastic rubber resin adhesive, a solvent-based rubber adhesive or an acrylic polymer based adhesive.
  • the structure further comprises a release paper on which the adhesive film and support material form a coating, for storage before use.
  • Fig. 1 is a schematic transverse section through a structure according to the present invention for use as a transfer adhesive
  • Fig. 2 is a highly schematic partial perspective view of a support material for use in the structure of Fig. 1 ;
  • Fig. 3 is a side view of the structure of Fig.1 during use .
  • an adhesive structure 10 comprising a film 12 of adhesive, and support material 14 embedded in the adhesive film 12.
  • the adhesive material and the support material have a tensile strength in combination which is sufficiently low to allow the adhesive film and the support material to be broken together, in use, by applying a longitudinal force against the resistance provided by the adhesion of the film to an article.
  • the support material 14 has a regular structure shown in Fig. 2, which defines lines 16 of relative weakness along which the support material 14 will preferentially break.
  • the support material 14 has a tensile strength which is sufficiently high to prevent the adhesive film 12 from stretching.
  • the adhesive film 12 and support material 14 will, in use, break together along a weakness line 16 in the support material 14.
  • Fig.1 shows a film 12 of adhesive formed as strip along a release paper 18, such as a silico ⁇ e paper.
  • the adhesive may be a thermoplastic (hot-melt) rubber resin adhesive, a solvent-based resin adhesive or an acrylic polymer based adhesive.
  • a support material 14 in the form of synthetic plastics net, is embedded in the film 12. This may conveniently be achieved by applying two layers of adhesive to opposite faces of the net, thereby embedding the net. For some applications, it may be appropriate to embed the net between two layers of different adhesives, such as adhesives with different adhesion properties. This allows the structure to perform a "differential" adhesive function, adhering more strongly on one face than on the other.
  • the net is shown more clearly in Fig. 2.
  • the net consists of "warp" portions 20 which run longitudinally along the strip of the adhesive film 12, and "weft" portions 22 which extend between adjacent warps 20. Although the terms warp and weft are used, the material is not necessarily woven.
  • a suitable material for the net 14 is Net 909 manufactured by Smith and Nephew Plastics Ltd. This is a mixture of polystyrene and polyethylene. The net is created by extruding a thin polymer film which is embossed to create openings which are then burst open more widely by stretching the material.
  • Fig. 3 indicates how the transfer adhesive structure described above can be used.
  • the end 25 of the film 12 (containing the support material 14) is brought into contact with the article 24 and the film 12 is then laid along the article 24 for instance by using an applicator gun of the type described above and in the manner described above.
  • the release paper 18 is removed.
  • a force is applied along the film 12 and support material 14 in the direction of the arrow 26. This force is resisted by the adhesion of the film 12 to the article 24, as indicated by the arrow 28.
  • the properties of the materials are chosen to allow the adhesive resistance 28 to resist forces at least as great as the breaking force of the adhesive 12 and support material 14 in combination.
  • the support material 14 will break, generally transverse of the strip along a line defined by the weakness lines 16. This leaves a neat end to the strip at 30.
  • the adhesive film 12 is prevented from stretching or stringing by the tensile strength of the material 14.
  • the support material 14 breaks, the break will take place quickly and neatly, breaking the adhesive film at the same time. The adhesive film around the break remains attached to the support material, and therefore cannot stretch or string.
  • Fig.1 The structure of Fig.1 would normally be used when the article to which the film 12 is applied is immediately to be stuck to another article.
  • the release paper 18 may extend beyond the edges of the adhesive, to allow the resulting structure to be used as a finger-lift tape, in which the release paper 18 is removed by hand.
  • Strips of adhesive as described above may be manufactured by forming wide rolls of adhesive on release paper, using large sheets of support material and large areas of adhesive. The rolls are subsequently cut transversely to produce a number of rolls of relatively narrow adhesive strips. Consequently, it is desirable that the support material has sufficient strength, transverse to the final strip, to prevent the adhesive stretching as the cut narrow rolls are separated.

Landscapes

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

Abstract

Structure adhésive (10) comprenant un film (12) d'adhésif et une matière de support (14) intégrée dans le film adhésif (12). La matière adhésive et la matière de support combinées possèdent une résistance à la rupture qui est suffisamment faible pour permettre leur cassure simultanée lors de l'utilisation, par application d'une force longitudinale opposée à la force de résistance due à l'adhérence du film sur un article. La matière de support (14) possède une structure régulière déterminant des lignes d'affaiblissement relatif le long desquelles elle va se rompre de préférence. La matière de support possède une résistance à la traction suffisamment élevée pour empêcher l'étirement du film adhésif. Ainsi, le film adhésif (12) et la matière de support (14) se casseront, lors de l'utilisation, le long d'une ligne d'affaiblissement située dans la matière de support (14), sans étirement.
PCT/GB1991/001626 1990-10-11 1991-09-23 Adhesif sous forme de film WO1992007041A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP3515280A JPH06504299A (ja) 1990-10-11 1991-09-23 フィルム形状を有する接着剤
GB9306758A GB2264243B (en) 1990-10-11 1993-03-31 Adhesive in the form of a film

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9022129.2 1990-10-11
GB909022129A GB9022129D0 (en) 1990-10-11 1990-10-11 Adhesives

Publications (1)

Publication Number Publication Date
WO1992007041A1 true WO1992007041A1 (fr) 1992-04-30

Family

ID=10683570

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1991/001626 WO1992007041A1 (fr) 1990-10-11 1991-09-23 Adhesif sous forme de film

Country Status (6)

Country Link
EP (1) EP0553118A1 (fr)
JP (1) JPH06504299A (fr)
AU (1) AU8613291A (fr)
GB (2) GB9022129D0 (fr)
IL (1) IL99493A0 (fr)
WO (1) WO1992007041A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096202A (en) * 1960-08-30 1963-07-02 Johnson & Johnson Polyvinyl pyrrolidone pressure sensitive adhestive and tape containing same
CH417825A (de) * 1962-04-28 1966-07-31 Koenig Claus Klebeband, insbesondere Selbstklebeband
US3853598A (en) * 1970-04-17 1974-12-10 Scholl Inc Adhesive tape
DE3134712A1 (de) * 1980-09-04 1982-04-29 The Kendall Co., Walpole, Mass. Klebeband
DE3217801A1 (de) * 1982-05-12 1983-11-17 Gebrüder Seidel GmbH & Co., 6102 Pfungstadt Verschluss - klebestreifen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096202A (en) * 1960-08-30 1963-07-02 Johnson & Johnson Polyvinyl pyrrolidone pressure sensitive adhestive and tape containing same
CH417825A (de) * 1962-04-28 1966-07-31 Koenig Claus Klebeband, insbesondere Selbstklebeband
US3853598A (en) * 1970-04-17 1974-12-10 Scholl Inc Adhesive tape
DE3134712A1 (de) * 1980-09-04 1982-04-29 The Kendall Co., Walpole, Mass. Klebeband
DE3217801A1 (de) * 1982-05-12 1983-11-17 Gebrüder Seidel GmbH & Co., 6102 Pfungstadt Verschluss - klebestreifen

Also Published As

Publication number Publication date
JPH06504299A (ja) 1994-05-19
AU8613291A (en) 1992-05-20
GB9022129D0 (en) 1990-11-21
GB2264243B (en) 1994-10-19
EP0553118A1 (fr) 1993-08-04
GB9306758D0 (en) 1993-06-09
IL99493A0 (en) 1992-08-18
GB2264243A (en) 1993-08-25

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