WO2004060661A1 - Film stratifie pouvant etre facilement retire - Google Patents

Film stratifie pouvant etre facilement retire Download PDF

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Publication number
WO2004060661A1
WO2004060661A1 PCT/JP2003/017046 JP0317046W WO2004060661A1 WO 2004060661 A1 WO2004060661 A1 WO 2004060661A1 JP 0317046 W JP0317046 W JP 0317046W WO 2004060661 A1 WO2004060661 A1 WO 2004060661A1
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WO
WIPO (PCT)
Prior art keywords
layer
peelable
thermoplastic resin
laminated film
easily peelable
Prior art date
Application number
PCT/JP2003/017046
Other languages
English (en)
Japanese (ja)
Inventor
Hiroshi Koike
Original Assignee
Yupo Corporation
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 Yupo Corporation filed Critical Yupo Corporation
Priority to AU2003296169A priority Critical patent/AU2003296169A1/en
Publication of WO2004060661A1 publication Critical patent/WO2004060661A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D15/00—Printed matter of special format or style not otherwise provided for
    • B42D15/02—Postcards; Greeting, menu, business or like cards; Letter cards or letter-sheets
    • B42D15/025—Postcards; Greeting, menu, business or like cards; Letter cards or letter-sheets with peel-away layer hiding information
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/06—Interconnection of layers permitting easy separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D15/00—Printed matter of special format or style not otherwise provided for
    • B42D15/0053—Forms specially designed for commercial use, e.g. bills, receipts, offer or order sheets, coupons

Definitions

  • the present invention relates to an easily peelable laminate in which the curl of the base layer (A) after peeling is controlled.
  • the easily peelable laminated film is useful as a base material for a delivery table, an application seal, a coupon, and the like having no residual adhesive.
  • the delivery information is written on the surface of the peelable base material as a delivery slip, attached to the delivery product with an adhesive, and after the delivery is completed, a part of the peelable base material is peeled and delivered at the destination.
  • a method has been proposed in which people take home and store the delivery information.
  • Japanese Unexamined Patent Publication No. 09-327985 discloses a delivery slip provided with an interlayer separation layer between a base material and an adhesive, and a method for manufacturing the same.
  • a bonded laminate is disclosed.
  • the delivery slips obtained by these methods are paper-based, and if the slips get wet due to dew condensation or rainy weather on frozen delivery items, they may break during the peeling, or some of them may be broken. There was a disadvantage of being damaged.
  • Japanese Patent Application Laid-Open No. Hei 8-30202 discloses that a surface substrate, a cohesive failure layer, a seepage prevention layer, and an adhesive layer are sequentially laminated.
  • Japanese Patent Application Laid-Open No. 2002-113817 discloses a peeling prevention label comprising a peelable layer (B) having a peel strength of 5 to 150 gZm 2 and at least two layers of a base layer (A). An excellent easily peelable laminated film has been proposed.
  • the easily peelable laminated film obtained by these methods has excellent water resistance and peelability
  • the film itself obtained after peeling is curled in a cylindrical shape. If it is used for delivery slips, coupons, application stickers, etc., it will be jammed by the automatic reading processor due to curling, and if files are stored, they will be bulky and require a lot of storage space. There was found.
  • the present invention has been made to solve these problems of the prior art and to provide an easily peelable laminated film having extremely excellent characteristics.
  • the present invention relates to an easily peelable laminated film having excellent water resistance and excellent peel initiation properties as a base material for delivery slips, application seals, coupons, etc., and a curl of the base layer recovered after peeling, which is small.
  • the present invention provides an information concealing property capable of concealing information provided on the back of a base material when used as a base material for a delivery slip, an application seal, a coupon, and the like, and provided on the back of the base material after the base material is peeled off.
  • Another issue to be solved is to provide an easily peelable laminated film that has information recognizability that can recognize the information that has been obtained.
  • the present inventors have made intensive studies to solve these problems, and as a result, provided an easily peelable laminated film having desired characteristics by forming a thermoplastic resin film having a specific layer structure.
  • the inventors have found that the present invention has been completed, and have completed the present invention.
  • the present invention is a laminated film in which at least two layers of a base layer (A) made of a thermoplastic resin composition and a peelable layer (B) are laminated, and an evaluation film (size: An easily peelable laminated film, characterized in that the absolute value of the height of the force in one minute or more after peeling (length 20 Omm X width 5 Omm) is 60 mm or less in 1 minute or more. It is an easily peelable laminated finolem that preferably satisfies the following conditions.
  • the release layer (B) is preferably stretched in at least one axis direction.
  • the peel strength of the peelable layer (B) is preferably in the range of 5 to 150 g / cm, the opacity of the easily peelable laminated film is preferably 60 to 100%, and the base layer (A)
  • the thickness of the peelable layer (B) is 0.1 to 100 m, and the thickness of the base layer (A) is preferably in the range of 10 to 500 // m. It is preferable that the thermoplastic resin composition contains 1 to 60% by weight of an inorganic fine powder and / or an organic filler and 99 to 40% by weight of a thermoplastic resin, and the thermoplastic resin composition of the peelable layer (B) is It preferably contains 10 to 80% by weight of an inorganic fine powder and / or an organic filler and 90 to 20% by weight of a thermoplastic resin, and the outermost layer of the base layer (A) is capable of forming characters and / or images. It is an easily peelable laminated film that may have a coat layer (D).
  • the thermoplastic resin composition contains 1 to 60% by weight of an inorganic fine powder and / or an organic filler and 99 to 40% by weight of a thermoplastic resin
  • the thermoplastic resin composition of the peelable layer (B) is It preferably contains 10 to 80% by weight of an inorganic fine
  • the easily peelable laminated film of the present invention can be provided with an adhesive layer (E) and a release paper layer (F), and can be used as a recorded material by printing and / or printing. It is.
  • the laminated film of the present invention is composed of at least two layers of the base layer (A) and the peelable layer (B), and if necessary, the protective layer (C), the coat layer (D), and the adhesive layer. It is an easily peelable laminated film that may be provided with an agent layer (E), release paper (F), or another laminated film.
  • the strength of the base layer (A) is higher than that of the peelable layer (B) described later, and the base layer (A) does not break itself when peeled off with the base layer (A) layer.
  • the base layer (A) is made of a thermoplastic resin composition.
  • the thermoplastic resin composition may be a single thermoplastic resin or a combination of two or more thermoplastic resins. Or may contain an inorganic fine powder and an organic or organic filler. Further
  • a combination of a stretched film made of a thermoplastic resin composition and a coat layer (D) described below may be used.
  • thermoplastic resin composition used for the base layer (A) is inorganic fine powder and Z or organic filler 1 to 60% by weight, preferably 3 to 50% by weight, and thermoplastic resin 99 to 40% by weight. It is preferably a thermoplastic resin composition containing 97 to 5% by weight. If the content of the inorganic fine powder and / or organic filler in the base layer (A) is less than 1% by weight, sufficient pores cannot be formed in the base layer (A), resulting in a film having low opacity and insufficient information concealment. On the other hand, if it exceeds 60% by weight, stretch molding becomes difficult.
  • thermoplastic resin used for the base layer (A) is not particularly limited.
  • thermoplastic resins it is preferable to use a polyolefin-based resin and a functional group-containing polyolefin-based resin which are excellent in processability.
  • polyolefin resins include homopolymers of olefins such as ethylene, propylene, butylene, butadiene, isoprene, octaprene, methyl-11-pentene, and two or more of these olefins. And a copolymer consisting of
  • a propylene-based resin is preferable in terms of chemical resistance, cost, and the like.
  • the propylene-based resin is a propylene homopolymer, polypropylene having isotactic or syndiotactic properties and various degrees of stereoregularity, and propylene as a main component. It is preferable to use, as a main component, a copolymer obtained by copolymerizing olefins such as 1-butene, 11-hexane, 11-heptane and 4-methyl-11-pentene.
  • This copolymer may be a binary system, a ternary system or more, and may be a random copolymer or a block copolymer. It is preferable to use a resin having a melting point lower than that of the propylene homopolymer in a proportion of 2 to 25% by weight in the propylene resin. High-density or low-density polyethylene can be exemplified as such a resin having a low melting point.
  • an inorganic fine powder an organic filler, a stabilizer, a light stabilizer, a dispersant, a lubricant, and the like can be added to the thermoplastic resin composition constituting the base layer (A).
  • an inorganic fine powder one having a particle size of usually 0.01 to 15 m, preferably 0.01 to 5 jt / m is used.
  • calcium carbonate, calcined clay, silica, diatomaceous earth, clay, talc, titanium oxide, barium sulfate, alumina, zeolite, myriki, sericite, bentonite, sepiolite, vermiculite, dolomite, warast Knight, glass fiber, etc. can be used.
  • thermoplastic resin is a polyolefin resin
  • the organic filler polyethylene terephthalate, polyethylene terephthalate, polycarbonate, nylon-16, nylon-16,6, homopolymer of cyclic olefin, polystyrene, polymetallic Or a copolymer (COC) of a cyclic olefin and ethylene, etc., having a melting point higher than the melting point of the polyolefin resin (for example, 120 to 300 ° C) or a glass transition temperature (for example, 1 ° C). 20 to 280) and incompatible ones can be used.
  • a stabilizer When a stabilizer is added, it is usually added in the range of 0.001 to 1% by weight. Specifically, sterically hindered phenol-based, phosphorus-based, amine-based stabilizers and the like can be used. When a light stabilizer is used, it is usually used in the range of 0.001-1% by weight. Specifically, sterically hindered amines, benzotriazole-based, benzophenone-based light stabilizers and the like can be used. The dispersant and the lubricant are used, for example, for the purpose of dispersing inorganic fine powder. The amount used is usually in the range of 0.01 to 4% by weight Inside. Specifically, silane coupling agents, higher fatty acids such as oleic acid and stearic acid, metal stones, polyacrylic acid, polymethacrylic acid or salts thereof can be used.
  • the thickness of the base layer (A) is in the range of 10 to 500 mm, preferably 20 to 300 mm.
  • the breaking strength of the base layer (A) is low, and when the base layer (A) is peeled off, the base layer (A) breaks on the way and does not exhibit the expected performance of the present invention.
  • it exceeds 500; Um when the easily peelable laminated film is used for a delivery slip or the like, it becomes a thick slip and bulky, resulting in poor file storage properties.
  • the stretched film layer forming the base layer (A) may have a two-layer structure or a multilayer structure of three or more layers, and the number of stretch axes of the multilayer structure is one-axis / one-axis, one-axis, two-axis, two-axis.
  • Axis Z 1 axis, 2 axes 2 axes, 1 axis / 1 axis 2 axes, 1 axis Z 2 axes / 1 axis, 2 axes 1 axis 1 axis, 1 axis Z2 axis 2 axes, 2 axes / 2 axes 1 axis, 2-axis Z 2-axis / 2 axes may be used.
  • Various functions such as writability, printability, suitability for thermal transfer, abrasion resistance, suitability for secondary processing, etc. can be added by making the base layer (A) multilayer.
  • the peelable layer (B) in the present invention is a layer having lower strength than the base layer (A), and the peeling of the base layer (A) of the present invention is performed by breaking the peelable layer (B).
  • the peelable layer (B) is made of a thermoplastic resin composition.
  • the thermoplastic resin composition may be a single thermoplastic resin, may be a combination of two or more thermoplastic resins, or may contain an inorganic fine powder and Z or an organic filler. Is also good.
  • the thickness of the peelable layer (B) is in the range of 0.1 to 100 / m, preferably 0.2 to 80 im, more preferably 0.3 to 60 jt / m. If the thickness is less than 0.1 ⁇ m, sufficient peelability cannot be obtained.On the other hand, if it exceeds 100 / m, there is no problem with the peel strength, but the concealment of the peelable layer (B) remaining after peeling is high. However, the recognition of information provided under the peelable layer (B) is reduced. In addition, since the amount of the peelable layer (B) remaining changes depending on the peeling speed, the fluctuation range of the information recognizability under the peelable layer (B) also increases.
  • the peelable layer (B) of the present invention utilizes the fact that the strength of the peelable layer (B) is reduced by stretching to form a large number of holes.
  • Preferred forms of the peelable layer (B) of the present invention are inorganic fine powder and / or organic filler of 10 to 80% by weight, preferably 15 to 70% by weight, and thermoplastic resin of 90 to 20% by weight.
  • the stretched thermoplastic resin film preferably contains 85 to 30% by weight. If the content of the inorganic fine powder and the inorganic or organic filler in the peelable layer (B) is less than 10% by weight, sufficient peelability cannot be obtained, and if it exceeds 80% by weight, the molding stability is impaired.
  • thermoplastic resin the thermoplastic resins listed in the section of the base layer (A) can be used, and it is preferable to use the same polyolefin-based resin and functional group-containing polyolefin-based resin as in the base layer (A).
  • the thermoplastic resin used for the release layer (B) preferably contains a resin having low breaking strength.
  • ethylene-based resin, propylene-based resin, and ethylene-unsaturated carboxylic acid copolymer are preferable.
  • copolymers of ethylene and atalylic acid, and graft-modified products thereof can be used for such graft modification, and specific examples include graft modification with an unsaturated carboxylic acid or a derivative thereof.
  • the unsaturated carboxylic acid examples include acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid and the like. Further, as the unsaturated carboxylic acid derivative, acid anhydrides, esters, amides, imides, metal salts and the like can also be used. As the inorganic fine powder and Z or the organic filler, those mentioned in the section of the base layer (A) can be used.
  • the peelable layer (B) has a weak strength in itself and has a structure easily broken in the layer, it is difficult to stretch-mold the peelable layer (B) as a single layer.
  • the peelable layer (B) can be easily stretched after lamination with the base layer (A) or, if the base layer (A) has a multilayer structure, after lamination with some layers of the base layer (A). Can be implemented.
  • a protective layer (C) can be provided outside the peelable layer (B) if necessary.
  • the protective layer (C) By providing the protective layer (C), it is possible to prevent the generation of powder generated by the destruction of the peelable layer (B) during the production, processing and printing of the easily peelable laminated film.
  • the protective layer (C) needs to have a breaking strength that does not hinder the start of peeling of the peelable layer (B).
  • the breaking strength of the protective layer (C) is preferably 500 gZcm or less, more preferably It is desirable to be 400 gZcm or less, particularly preferably 300 gZcm or less.
  • thermoplastic resin constituting the protective layer (C) the thermoplastic resins listed in the section of the base layer (A) can be used, and the same polyolefin resin and the functional group-containing polyolefin resin as the base layer (A) can be used. Preferably, it is used.
  • the thermoplastic resin used for the protective layer (C) is desirably a resin having a low breaking strength, and specifically, an ethylene-based resin, a propylene-based resin, an ethylene / unsaturated carboxylic acid copolymer, and a thermoplastic resin. Tylene / acrylic acid copolymers; and graft-modified products thereof.
  • the protective layer (C) may or may not contain the inorganic fine powder and Z or the organic filler, and does not contain the inorganic fine powder and Z or the organic filler, or It is preferable that the content is small because the effect of preventing powder generated by the destruction of the peelable layer (B) is excellent.
  • the protective layer (C) is preferably a stretched resin film layer, and it is possible to obtain a protective layer (C) having a small thickness and uniformity by stretching.
  • the thickness of the protective layer (C) is preferably 10 m or less, more preferably 8 jtm or less, and even more preferably 6 jtm or less.
  • the peeling of the peelable layer (B) does not start just by peeling off with the laminated film, and only the protective layer (C) needs to be specially processed with notches or slits, which is not practical. It will be.
  • the easily peelable laminated film of the present invention is provided by coating or the like on the surface of the base layer (A) in order to impart a function for imparting a performance capable of forming characters, images, or images. It is also possible to provide a coated layer (D).
  • Examples of the coating layer (D) are known as pigment coating layers suitable for offset printing, gravure printing, flexographic printing, screen printing, letter press printing, etc.
  • Examples of the pigment include various combinations of known pigments and known binders, or binders suitable for respective printing inks.
  • Examples of the thermal recording coating layer include known combinations of leuco dyes and developers.
  • the ink jet recording coat layer includes a known combination of a water-soluble resin, an emulsion resin, a water-absorbing pigment, and a cationic substance as a dye fixing agent.
  • Examples of the coating layer for melting thermal transfer recording include a known combination of an lipophilic pigment and various binder resins, or a receptor layer mainly composed of a low melting point resin having a melting point of 130 ° C. or lower.
  • An example of the sublimation heat transfer coating layer is a receptor layer containing a dye-fixing resin as a main component.
  • the pigment coating agents include clay, tanolek, calcium carbonate, magnesium carbonate, aluminum hydroxide, silica, aluminum silicate, calcium silicate, and the like used in ordinary coated paper.
  • Adhesives used at this time include latexes such as SBR (styrene-butadiene rubber) and MBR (methacryloline-butadiene rubber), acrylic emulsion (an aqueous solution containing an acrylate resin), starch, PVA (polyvinyl alcohol), CMC (carboxymethylcellulose), methylcellulose and the like can be mentioned.
  • dispersants such as specialty sodium polycarboxylate, crosslinking agents such as polyamide urea resin, antifoaming agents, waterproofing agents, lubricants, fluorescent paints, etc. can be added to these compounding agents. .
  • These Pigment coating agent is generally 5-9 0 weight 0/0, preferably used as the water-soluble coating agent having a solid concentration of 3 5-6 5 wt%.
  • the coating amount of the coat layer (D) is 0.1 :! to 50 g Zm 2 , preferably 0.1 to: 15 g Zm 2 .
  • the thickness of the coating layer is 0.1 to 0.5 m, preferably 0.1 to 20 m, and particularly preferably 0.5 to 15 jum. It is formed.
  • the coating surface may be subjected to a press smoothing treatment by a calender treatment or the like as necessary. Coating may be performed two or more times as necessary.
  • the molding method for forming the thermoplastic resin film is not particularly limited, and various known methods can be used. Specific examples include a single-layer or multilayer T-die or I-die connected to a screw-type extruder. Using a circular die to extrude the molten resin into a tube and extruding the molten resin with the air pressure inside, and rolling the kneaded material with multiple hot rolls. Examples include calendering and rolling to be processed into a sheet. As a method of laminating the base layer (A) and the peelable layer (B) and further providing the protective layer (C), or a method of forming the base layer (A) into a multilayer structure, the layers may be laminated by various known methods.
  • specific examples include a multilayer die system using a feed block and a multi-mae hold, and an extrusion lamination system using a plurality of dies. It is also possible to use a combination of a multilayer die and an extrusion lamination.
  • the stretching temperature can be set within a known temperature range suitable for stretching a thermoplastic resin whose temperature is equal to or higher than the glass transition temperature of the thermoplastic resin mainly used for the base layer (A) and equal to or lower than the melting point of the crystal part.
  • the thermoplastic resin of the base layer (A) is a propylene homopolymer (melting point: 155-167 ° C)
  • it is 100-166 ° C
  • high-density polyethylene melting point: 12 (1 ⁇ 13 36 ° C) 70 ⁇ : I 35 ° C, from melting point:! ⁇ 70 ° C lower temperature.
  • the stretching speed is preferably 20 to 35 Om / min.
  • the stretching methods used for stretching cast films include longitudinal stretching using the difference in peripheral speed between rolls, transverse stretching using a tenter oven, rolling, and simultaneous biaxial stretching using a combination of a tenter oven and a linear motor. Can be mentioned. As for the method of stretching the blown film, the tubular method is used. Simultaneous biaxial stretching can be mentioned.
  • the stretching ratio is not particularly limited, and is appropriately determined in consideration of the characteristics of the thermoplastic resin used for the base layer (A).
  • a propylene homopolymer or a copolymer thereof when used as the thermoplastic resin, when the film is stretched in one direction, it is about 1.2 to 12 times, preferably 2 to 10 times, and biaxially.
  • the area magnification is 1.5 to 60 times, preferably 4 to 50 times.
  • other thermoplastic resin it is 1.2 to 10 times, preferably 2 to 5 times when stretched in one direction, and 1.5 to 20 times in area magnification when biaxially stretched. Preferably it is 4 to 12 times.
  • the laminated film thus obtained has a large number of fine pores having a porosity calculated by the following formula (2) of 5 to 60%, preferably 10 to 45%.
  • the presence of the holes makes the film more pliable than a laminated stretched film having no holes.
  • the true density is approximately equal to the density before stretching.
  • the peel strength of the present invention in the MD direction (Machine D irection) and the TD direction (Traverse D irection) is preferably 5 to 150 gZcm, more preferably 5 to 100 g / cm. cm And more preferably 5 to 75 g / cm. If the peel strength is less than 5 gZcm, there is a disadvantage that peeling occurs easily during supply / discharge during secondary processing such as printing, printing, and cutting, which causes a problem in secondary processing. If the width exceeds 150 g / cm, the base layer (A) does not peel or the stress required for peeling must be increased, which is not practical. In addition, material destruction occurs in portions other than the release layer (B), and fluffing occurs on the release surface.
  • the easily peelable laminated film is gently peeled off from the aluminum plate to form the peelable layer (B). Peel off to obtain a sample with only the base layer (A). Cut the sample to a width of 10 mm and a length of 15 Omm, store it in a constant temperature room (temperature 20 ° C, relative humidity 65%) for 12 hours, and then use a tensile tester (Shimadzu Corporation, AUTOGRAPH) to set the tensile speed. It is measured at 2 mm / min, calculated from the strain between two points (strain rate; 0.0005 to 0.0025) and the stress difference at that time, and the respective values in the MD and TD directions are used.
  • the easily peelable laminated film of the present invention functions suitably when each of the MD direction and the TD direction satisfies the following expression (1).
  • the (EXt-50) / P value is 1.8 to 400, preferably 2.0 to 350, more preferably 2.2 to 300. is there. If the value of equation (1) is less than 1.8, the force after peeling of the base layer (A) obtained after peeling is large, so that it is impossible to read the recorded content of the base layer (A) with an automatic reader or the like. Become. In addition, it becomes bulky when stored as a form, and is therefore less practical. On the other hand, if it exceeds 400, there is no problem in curling after peeling, but the base material (A) is too strong to be practically used for slips. [Opacity]
  • Opacity is based on JIS-P-8138, and the ratio of the reflectance of light measured by applying a black and white standard plate to the back of the measurement sample (black plate and white plate) is shown as a percentage. Display by value.
  • the opacity of the easily peelable film of the present invention is preferably from 60 to 100%, more preferably from 70 to 100%, particularly preferably from 85 to 100%. If the opacity is less than 60%, the information provided on the back surface of the easily peelable laminated film will be transparent, and the expected performance of the present invention will not be exhibited.
  • the easily peelable laminated film of the present invention can be provided with an adhesive layer (E) if necessary.
  • Typical examples of such an adhesive include a rubber-based adhesive, an acrylic-based adhesive, and a silicone-based adhesive.
  • the rubber-based adhesive include polyisobutylene rubber, butyl rubber and a mixture thereof, or Examples thereof include those obtained by compounding a tackifier such as rosin abietate, a terpene / phenol copolymer, or a terpene / indene copolymer with these rubber-based pressure-sensitive adhesives.
  • acrylic pressure-sensitive adhesives include glass transition points such as 2-ethylhexyl acrylate 'n-butyl acrylate copolymer and 2-ethylhexyl acrylate / ethyl acrylate / methyl methacrylate copolymer. Those having a temperature of not more than 120 ° C are exemplified.
  • a solvent type As the form of these pressure-sensitive adhesives, a solvent type, an emulsion type, a hot melt type and the like are used. In general, the adhesive is laminated by applying a solvent type or an emulsion type.
  • Such coating is carried out by a rono coater, a spread coater, a bar coater, an air knife coater, a gravure coater, a reverse coater, a die coater, a lip coater, a spray coater, a comma coater, etc.
  • a drying step an adhesive layer (E) is formed.
  • the pressure-sensitive adhesive layer (E) To form the pressure-sensitive adhesive layer (E), apply a pressure-sensitive adhesive to release paper described below, dry if necessary, and laminate the easily peelable laminated film on the pressure-sensitive adhesive layer (E).
  • the method is generally used, but in some cases, it can be formed by directly applying an adhesive to the easily peelable laminated film.
  • the coating amount of the pressure-sensitive adhesive is not particularly limited, but is usually in the range of 3 to 60 g / m 2 , preferably 10 to 40 g / m 2 in terms of solid content.
  • the pressure-sensitive adhesive layer preferably has a delamination strength of 200 to 3000 g / 20 mm, and is preferably stronger than the peel strength of the release layer (B).
  • the delamination strength of the pressure-sensitive adhesive layer is determined by applying the pressure-sensitive adhesive to be used and the amount of coating to a 50 m-thick biaxially stretched polypropylene film by the above method and drying to form a pressure-sensitive adhesive layer. After attaching to a 0.5mm thick aluminum plate, cut it into 2 Omm width and 100mm length and use a tensile tester (Shimadzu Corporation, AUTOGRAPH) at a pulling speed of 300mm / min. The biaxially stretched polypropylene film was peeled at an angle of °°, and the stress when the peeling was stable was measured with a load cell.
  • an anchor coat agent to the back surface of the laminated film before applying the pressure-sensitive adhesive.
  • the anchor coating agent polyurethane, polyisocyanate 'polyether polyol, polyisocyanate ⁇ polyester polyol ⁇ polyethyleneimine, alkyl titanate and the like can be used. These are generally methanol, ethyl acetate, toluene and hexane. It is used by dissolving in an organic solvent such as, or water.
  • the coating amount of the anchor coating agent, 0. 01 ⁇ 5 g / m 2 by solid content after coating and drying, is preferably in the range of 0. 02 ⁇ 2 g / m 2.
  • a release paper (F) may be provided outside the pressure-sensitive adhesive layer.
  • the release paper (F) provided on the easily peelable laminated film with the adhesive layer interposed between it and the surface in contact with the adhesive layer (E) is treated with silicon to improve the releasability from the adhesive layer (E). Is generally applied.
  • release paper (F) general paper can be used, and high-quality paper or kraft paper can be used as is, or subjected to force rendering, resin coating, or film lamination. , Dallasin paper, coated paper, plastic film, etc. that have been siliconized can be used.
  • the curl height after peeling in the present invention is similarly evaluated in each of the MD direction and the TD direction, and the larger absolute value is adopted as the measurement result.
  • the post-peeling curl height of the present invention preferably has an absolute value in the MD and TD directions of preferably 60 mm or less, more preferably 40 mm or less, and still more preferably 20 mm or less. If the curl height after peeling exceeds 6 O mm, the recorded contents cannot be read by an automatic reader or the like, or will be bulky when stored as a form, resulting in poor practicality.
  • a recorded matter can be created by printing and printing, if necessary, a product name, a manufacturer, a shelf life, a character picture, an entry field, a par code, and the like.
  • known methods can be used, and examples thereof include offset printing, letterpress printing, gravure printing, flexo printing, screen printing, electrophotographic printing, inkjet printing, fusion heat transfer printing, and sublimation heat transfer printing.
  • These printing and printing may be performed in the state of the easily peelable laminated film alone, or may be performed after forming the structure having the release paper (F). Examples>
  • thermoplastic resins and thermoplastic resin compositions used in the present invention are percentages by weight unless otherwise specified.
  • Table 1 summarizes the thermoplastic resins and thermoplastic resin compositions used in the present invention.
  • thermoplastic resin composition e was used as the layer (B) and the thermoplastic resin composition a was used as the layer (A1). After kneading with an extruder set at 230 ° C, the temperature was set at 250 ° C.
  • the co-extrusion die was supplied to the co-extrusion die, and the laminated product was extruded into a sheet and cooled by a cooling device to obtain a two-layer unstretched sheet. The unstretched sheet was heated to 155 and stretched 5.5 times in the machine direction by stretching between rolls having different peripheral speeds.
  • thermoplastic resin composition c was formed into the (A2) layer and the thermoplastic resin composition d was formed into the (A3) layer, and kneaded with an extruder set at 250 ° C., and extruded into a sheet shape.
  • the film was laminated on the (A1) layer surface of the 5-fold stretched film to obtain a laminated film having a four-layer structure.
  • the four-layer laminated film was cooled to 60 ° C, heated again to about 160 ° C using a tenter oven, stretched 7 times in the transverse direction, and then heated to 16 ° C. Heat treatment was performed in the adjusted heat setting zone.
  • the mixture was supplied to one co-extrusion die set at 240 ° C, and the laminated product was extruded in a sheet form and cooled by a cooling device to obtain a three-layer unstretched sheet. .
  • This The non-stretched sheet was heated to 150 ° C. and stretched 5 times in the machine direction by stretching between rolls having different peripheral speeds.
  • thermoplastic resin composition b was formed into a layer (A2), kneaded with an extruder set at 250 ° C, extruded into a sheet, laminated on the (A1) layer surface of the 5-fold stretched film adjusted above, and formed into four layers A laminated film having the structure was obtained.
  • the laminated film having the four-layer structure was cooled to 60 ° C, heated again to about 150 ° C using a tenter oven, stretched 8 times in the transverse direction, and adjusted to 160 ° C. Heat treatment was performed in a heat set zone.
  • thermoplastic resin composition f was used as the (B) layer
  • thermoplastic resin composition b was used as the (A1) layer
  • thermoplastic resin composition c was used as the (A2) layer.
  • the mixture is fed to a single co-extrusion die set at 250 ° C, and the laminated material is extruded into a sheet and cooled in a cooling device to obtain a three-layer unstretched sheet.
  • the unstretched sheet was heated to 145 ° C and stretched 5 times in the machine direction by stretching between rolls having different peripheral speeds.
  • thermoplastic resin composition f was used as the (B) layer
  • thermoplastic resin composition a was used as the (A1) layer
  • thermoplastic resin composition b was used as the (A2) layer
  • each was mixed using an extruder set at 230 ° C.
  • the mixture was fed to one co-extrusion die set at 230 ° C, and the laminated products were extruded into a sheet in the die and cooled by a cooling device to obtain a three-layer unstretched sheet. .
  • the unstretched sheet is heated to 105 ° C and stretched between rolls with different peripheral speeds.
  • thermoplastic resin composition b was formed into an (A2) layer, kneaded with an extruder set at 250 ° C, fed to a die set at 250 ° C, extruded into a sheet, and cooled by a cooling device. Thus, a one-layer unstretched sheet was obtained. The unstretched sheet was heated to 150 ° C and stretched 4 times in the machine direction by stretching between rolls having different peripheral speeds.
  • thermoplastic resin i was set as a (C) layer at 180 ° C and melted by an extruder.
  • the thermoplastic resin composition g was used as the (B) layer, and the thermoplastic resin composition b was used as the (A1) layer.
  • thermoplastic resin composition d was further kneaded with the extruder set at 240 ° C as the (A3) layer, and then extruded into a sheet shape and adjusted above to obtain a 4 ⁇ stretch film ( A2) Laminated on the opposite side of the layers to obtain a laminated film having a five-layer structure.
  • the five-layer laminated film was cooled to 60 ° C, heated again to about 145 ° C using a tenter oven, stretched 8.5 times in the horizontal direction, and adjusted to 160 ° C. Heat treatment was performed in a heat set zone. After cooling to 60 ° C, the ears are slit, and 5 layers [(C) / (B) / (Al) / (A2) / (A3): wall thickness 2/1 5/40/103/40 jum: Stretched layer structure 1 axis 1 axis Z 1 axis No 2 axes / 1 axis] A laminated film having a thickness of 200 m was obtained.
  • An adhesive layer is laminated on the release layer (B) or the protective layer (C) side of the laminated film prepared in Examples and Comparative Examples, and the test film is composed of a laminated film Z adhesive layer Z release paper Got.
  • test film was cut into a square of 5 cm x 5 cm, the release paper was peeled off, and the film was adhered on a government-made postcard, and the releasability was evaluated.
  • Adhesive tape (-Chippan Co., Ltd., trade name "Cellotape" is applied to one of the four sides of the base layer (A) of the test film, and the base layer (A) is peeled off by hand from a government-made postcard and propagated Evaluate the state and peeling force,
  • the absolute value of the floating height from the glass plate at the four corners is more than 2 Omm and less than 6 Omm.
  • a barcode (COD E39) is printed on a synthetic paper (product name: VES85, manufactured by Upo Corporation) using a barcode printer (product name: B30, manufactured by Tec Corporation). A bar code reading sample was prepared.
  • Tables 2 and 3 show the results of the above examples, comparative examples, and test examples.
  • thermoplastic resin composition obtained by kneading a composition containing 10% by weight with an extruder set at a temperature of 230 ° C.
  • Propylene homopolymer [Novatech PP, manufactured by Nippon Polychem Co., Ltd. : FY 4]
  • MFR 230 ° C, 2.16 kg load
  • melting point 165 ° C
  • Thermoplastic resin composition kneaded with an extruder set at a temperature of 230 ° C.
  • thermoplastic resin composition obtained by kneading a composition containing 40% by weight with an extruder set at a temperature of 230 ° C object
  • thermoplastic resin composition obtained by kneading a composition containing 70% by weight of 0 / ⁇ in an extruder set at a temperature of 230 ° C
  • Example 2 45 75 22 300 12 100 87 1.66 0.24 ⁇ ⁇
  • the easily peelable laminated film of the present invention does not require special processing for initiating peeling, can peel the base layer (A) with a small force, and can curl the base layer (A) after peeling. Because of the small number, it can be effectively used for a wide range of applications such as delivery reports, application stickers, and coupons.

Abstract

L'invention concerne un film stratifié pouvant être facilement retiré présentant d'excellentes caractéristiques de résistance à l'eau et de facilité de retrait, utilisé en tant que matériau de base pour un bon de livraison, une étiquette d'inscription, un coupon ou similaire. La couche de base recueillie après le retrait ne gondole que peu. En outre, ce film permet de cacher des informations à l'arrière de la couche de base lorsque ce film est utilisé pour un bon de livraison, une étiquette d'inscription ou un coupon et ces informations situées à l'arrière de la couche de base peuvent être lues après retrait de ce film.
PCT/JP2003/017046 2002-12-27 2003-12-26 Film stratifie pouvant etre facilement retire WO2004060661A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003296169A AU2003296169A1 (en) 2002-12-27 2003-12-26 Easily-releasable lamented film

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002381312 2002-12-27
JP2002-381312 2002-12-27

Publications (1)

Publication Number Publication Date
WO2004060661A1 true WO2004060661A1 (fr) 2004-07-22

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Country Status (3)

Country Link
CN (1) CN100381279C (fr)
AU (1) AU2003296169A1 (fr)
WO (1) WO2004060661A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109641433B (zh) * 2016-09-16 2021-05-14 日本瑞翁株式会社 层叠片及其制造方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04166335A (ja) * 1990-10-30 1992-06-12 Showa Denko Kk 剥離紙基材用の多層フイルムまたはシート
JPH10258476A (ja) * 1997-03-21 1998-09-29 Oji Yuka Synthetic Paper Co Ltd 易剥離性積層フィルム

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3295240B2 (ja) * 1994-07-20 2002-06-24 大阪シーリング印刷株式会社 貼替防止ラベル
JPH09327985A (ja) * 1996-06-07 1997-12-22 Dainippon Printing Co Ltd 配送伝票とその製造方法
JP4668369B2 (ja) * 1999-01-19 2011-04-13 大日本印刷株式会社 配送伝票
JP4526214B2 (ja) * 2000-07-05 2010-08-18 株式会社ユポ・コーポレーション 易剥離性積層フィルム

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04166335A (ja) * 1990-10-30 1992-06-12 Showa Denko Kk 剥離紙基材用の多層フイルムまたはシート
JPH10258476A (ja) * 1997-03-21 1998-09-29 Oji Yuka Synthetic Paper Co Ltd 易剥離性積層フィルム

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CN1732084A (zh) 2006-02-08
CN100381279C (zh) 2008-04-16

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