WO1998035884A1 - Materiau d'emballage a fonction de demoulage - Google Patents

Materiau d'emballage a fonction de demoulage Download PDF

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Publication number
WO1998035884A1
WO1998035884A1 PCT/JP1998/000604 JP9800604W WO9835884A1 WO 1998035884 A1 WO1998035884 A1 WO 1998035884A1 JP 9800604 W JP9800604 W JP 9800604W WO 9835884 A1 WO9835884 A1 WO 9835884A1
Authority
WO
WIPO (PCT)
Prior art keywords
packaging material
release agent
agent layer
release
sealing
Prior art date
Application number
PCT/JP1998/000604
Other languages
English (en)
Japanese (ja)
Inventor
Takio Ito
Tsuyoshi Hiramatsu
Makoto Takahashi
Original Assignee
Nitto Denko 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 Nitto Denko Corporation filed Critical Nitto Denko Corporation
Priority to EP98902223A priority Critical patent/EP1010636A1/fr
Publication of WO1998035884A1 publication Critical patent/WO1998035884A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/42—Applications of coated or impregnated materials

Definitions

  • the present invention relates to a packaging material having a release function that can directly package various kinds of adhesive articles in a state where they can be peeled off from the article.
  • the present invention relates to a packaging material having a release function that can be processed.
  • An adhesive is often used as a simple means for adding an adhesive function to various articles.
  • the pressure-sensitive adhesive layer is formed on the surface (the good Una napkin typically an adhesive layer with a release paper)
  • the entire napkin is individually sealed and wrapped with a packaging material such as a plastic film, etc.
  • the opening of the packaging material after the napkin is wrapped is made of various types such as a heat seal method and a press seal method. Sealed by sealing.
  • a method of directly packing an adhesive-coated napkin with a packaging material having a release function on the surface without protecting the adhesive layer with release paper has become mainstream.
  • a packaging material having a releasing function a material in which various release agents such as silicone are applied to the surface of a base material such as a plastic film is generally used. ing.
  • Packaging materials have also been proposed. ( However, such packaging materials require the release agent to be applied in a pattern, so compared to those that do not require the release agent to be applied in a pattern. There were problems such as the complexity of the manufacturing process and the high cost in terms of product yield.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide a packaging material having a release function in which a release agent layer is formed on the surface of a base material, wherein the seal processing surface has a release agent.
  • An object of the present invention is to provide a packaging material having a release function capable of performing sealing with sufficient adhesive strength even on the surface of a layer. Disclosure of the invention
  • the present inventors have conducted intensive studies to solve the above problems, and as a result, formed a release material layer on the surface of a stretchable base material to produce a packaging material, and the release agent layer Cracks are formed when the material is stretched, and the above problem is solved by setting the area ratio of cracks per unit surface area of the release agent layer after the packaging material is stretched to a specific range. It has been found that the present invention can be achieved, and has led to the present invention.
  • the present invention relates to a packaging material having a release agent layer formed on the surface of a stretchable base material, wherein the release agent layer is formed when the packaging material is stretched. It is characterized by causing cracks, and the area ratio of cracks per unit surface area of the release agent layer after the packaging material is stretched is 10 to 80% (aspect 1) ). Further, the packaging material of the present invention is characterized in that the area ratio of a crack portion per unit surface area of the release agent layer in the sealed portion is 10% or more (aspect 2).
  • the present invention is found that, a brief description of the embodiment 1 or the packaging material having a releasing function of 2 related to that used as a separate packaging material tacky adhesive article (embodiment 3) c drawings
  • Fig. 1 is a cross-sectional view showing the packaging material having the release function of the present invention.
  • C Fig. 2 is a scanning electron microscope showing the surface of the release agent layer after stretching the packaging material having the release function of the present invention. It is an electron micrograph (magnification: 300 times) when observed by (SEM).
  • Figs. 3a and 3b are electron micrographs of the surface of the release agent layer in the sealed portion after heat sealing the packaging material having the release function of the present invention when observed by SEM.
  • the magnifications are 100 times and 300 times, respectively.
  • FIG. 4 is an enlarged cross-sectional view schematically showing the case where the packaging material having a releasing function of the present invention is used as an individual packaging material for a sanitary napkin with an adhesive.
  • FIG. 1 is a cross-sectional view showing a state of a packaging material having a release function according to the present invention (hereinafter, simply referred to as a packaging material) before a stretching treatment.
  • a release agent layer 2 is formed on one entire surface of a substrate 1 Make up the packaging material.
  • the release agent layer formed on the surface of the substrate immediately after the release agent is applied to the surface of the substrate and cured or dried, for example, as shown in FIG. 1, a continuous release agent film is formed on almost the entire surface of the substrate. Thereafter, by subjecting the packaging material having the above configuration to a stretching treatment, the release agent layer is cracked to be discontinuous.
  • the cracks generated in the release agent layer when the packaging material is stretched are usually defined by a scanning electron microscope (SEM) on the surface of the release agent layer of the packaging material after stretching. It is a fine crack that can be confirmed by observing at a magnification of 0 to 1000.
  • the crack has a diameter of about 100,000 A to 6,500,000 A (angstrom) as a diameter of the crack in a direction perpendicular to the stretching direction.
  • the surface of the base material that is the base is exposed, or the release agent application amount is smaller in that part compared to other parts It is formed as follows.
  • the surface of the release agent layer can be made a sealed surface by the cracks generated in the release agent layer.
  • FIG. 2 shows an electron micrograph (magnification: 300 times) of the surface of the release agent layer after the packaging material of the present invention was subjected to the stretching treatment (100% stretching) by SEM.
  • the packaging material of the present invention requires that the release agent layer be cracked when the packaging material is stretched as described above, and furthermore, the sealability on the release agent layer surface of the packaging material and the release property. from the viewpoint of compatibility between the mold features are measured by the method described below, the area ratio is 1 0-8 0% of the release agent layer unit surface area equivalent Rino cracking unit after the packaging material is stretched, good or Or 30% to 70%.
  • the packaging material The sealing strength (adhesion strength) when sealing the surface of the release agent layer is insufficient, and the sealing and holding ability as a packaging material is deteriorated. Further, when the area ratio of the cracked portion is higher than 80%, the release function is reduced, and the adhesive article cannot be smoothly separated from the packaging material.
  • the unit surface area of the release agent layer The area ratio of the crack is determined by analyzing the surface of the release agent after stretching the packaging material with an electron beam microanalyzer, obtaining a color mapping image, and performing image analysis processing. .
  • the release agent layer is composed of a silicone-based release agent, a fluorine-based release agent, and a long-chain alkyl-based release agent
  • the Si- ⁇ -ray, the F- ⁇ -ray, and the O- (4) The intensity of the line is measured using an electron beam microanalyzer, and the obtained color matching image is subjected to image analysis processing.
  • the method of measuring the area ratio of the crack portion per unit surface area of the release agent layer will be described in further detail, taking as an example the case where the release agent layer is made of a silicone-based release agent.
  • the packaging material of the present invention is formed of a material that can stretch the base material itself after forming a release agent layer on the surface of the base material and then forming a crack in the release agent layer by stretching the packaging material. Need to be configured.
  • the stretchable base material as referred to in the present invention has the stretchability following the stretching process for forming a crack in the release agent layer as described above, and further as a packaging material after the stretching process.
  • the material, configuration, and the like are not particularly limited as long as they have sufficient mechanical strength.
  • the packaging material of the present invention is subjected to sealing after forming a crack in the release agent layer
  • the base material itself has sealability by a heat sealing method, a press sealing method, or the like. Need to be.
  • the base material used for the packaging material of the present invention is not particularly limited as long as it satisfies the above-mentioned characteristics.
  • the base material is mainly composed of a polyolefin-based thermoplastic resin. It is preferred that it consist of a film.
  • polyethylene for example, polyethylene, polybutene, polyhexene, polyoctene and the like can be used alone or in a mixture, and polyethylene is particularly preferably used.
  • polyethylene any of ultra-low density, low density, linear low density, medium density, high density single product or blend product can be used, and particularly preferred is linear low density polyethylene.
  • content of Z or low density polyethylene is 15% by weight. /. The above, or those having a high-density polyethylene content of 80% by weight or less. If necessary, a material having a higher melting point than ultra-low-density or low-density polyethylene can be added to improve heat resistance.
  • Such a material has a melting point of less than or equal to 185 ° C, preferably from 110 to 180 ° C.
  • an elastomer component such as a styrene-based, polyolefin-based, or polyester-based polymer can be added, preferably in an amount of 40% by weight or less, to improve flexibility.
  • thermoplastic film examples include ultra-low density, low density, linear low density, medium density high density polyethylene, polypropylene, and ethylene vinyl acetate.
  • Polymer ethylene mono (meth) acrylic acid copolymer, ethylene mono
  • Methyl acrylate copolymer Ethylene mono (meth) Ethyl acrylate copolymer, Polyethylene propylene copolymer, Olefin-based elastomer, Styrene-based elastomer It consists of a single or a combination of two or more selected from polyisobutylene and butyl rubber.
  • the ethylene elastomers include ethylene-propylene rubber (EPT), ethylene-propylene-gene rubber (EPDM), ethylene-propylene and ethylene-butene elastomers such as styrene.
  • EPT ethylene-propylene rubber
  • EPDM ethylene-propylene-gene rubber
  • SIS styrene-isoprene-styrene block copolymer
  • SBS styrene butane-styrene block copolymer
  • the base material may have a single-layer structure as described above.
  • the base material is composed of at least two or more layers, and has a melting point higher than that of one of the layers on one or both sides. It is preferable to have a heat seal layer having a temperature lower than 5 ° C because heat seal can be performed easily and reliably.
  • Examples of such a base material include a layer made of low-density polyethylene (melting point: 100 ° C.) as a heat seal layer, and a high-density polyethylene.
  • the release agent layer is provided on the low-density polyethylene side which is the heat seal layer.
  • a laminate of a thermoplastic plastic film and a nonwoven fabric or a woven fabric is also preferable.
  • the surface of the base material can be roughened like a matte surface or an embossed surface. You can get a sense of luxury. In addition, the effect that the running property of the line can be improved by reducing the dynamic friction coefficient is obtained. Due to such a blend, incompatible materials are mixed so as to be separated from each other due to a difference in interfacial tension at the time of dissolution. However, since the surface is rough, the surface is considered to be a matte or embossed surface. The roughness of this surface is usually 0.2 to 30 ⁇ , preferably 2 to 5 // m, but when embossing or satin is formed with It is preferable that the thickness be within 1/2 of the thickness. By blending polymers with different properties, it becomes possible to blend them with each other's strengths only, and to provide polymers with new functions, for example, functions that balance softness and good stiffness. There is an effect that can be obtained.
  • the peeling sound can be reduced when the packaging material is peeled off from the adhesive article, and the use is not noticed by others. There is also an effect.
  • the film can be formed, for example, by a knurled surface that comes into contact with a T-die extruder during the production of the film. I like it.
  • the base material of the present invention at least one side of the multilayer thermoplastic plastic film composed of at least two or more layers is made to have a matte surface or an embossed surface made of the aforementioned polymer blend. You can.
  • the characteristics of the polymer film of each layer can be compounded like a polymer blend, and new functions can be added, for example, the heat sealability and the tear strength can be improved. This has the advantage that functions can be added, such as compatibility with good texture.
  • the base material of the present invention for example, at least one surface of a thermoplastic plastic film, for example, a matte surface having a surface roughness (R a) of about 12 or less of the film thickness.
  • a release agent layer can be provided on the other surface, which is an embossed surface. This structure improves softness when touched, high-grade appearance, and improved line running performance (dynamic friction coefficient). Reduction).
  • thermoplastic film has a matte or embossed surface having a surface roughness (Ra) of about 1 Z2 or less of the film thickness
  • a release agent layer may be provided on the surface.
  • the coefficient of static friction of the release surface or the embossed surface is preferably less than 1.5, preferably 0.2 to 1.0, and the dynamic friction coefficient was less than 1.2, preferably 0.1 to 1 0 is desirable.
  • the thickness of the base material is not particularly limited and is usually lmm or less, but from the viewpoint of softness and flexibility, it is 10 to 50/1 m, particularly 20 to 40 // m. I like it.
  • the tensile strength of the base material in the MD direction (measuring temperature: 23 ° C) Force SSOO gf Zl O mm or more, especially 300 to 100 gf / 1 O mm, tensile strength in the TD direction of 200 gf / 1 O mm or more, particularly 300 to 100 gf / 1 O mm Is preferred.
  • the material constituting the release agent layer in the present invention causes a crack in the release agent layer when the packaging material is stretched, and adjusts the area ratio of the cracked portion to a specific range.
  • the material is not particularly limited as long as it can be used, and a material having a release function satisfying such characteristics can be appropriately selected and used.
  • the material constituting the release agent layer examples include a silicone-based release agent such as a thermosetting type, an ultraviolet curing type, and an electron beam curing type, a fluorine-based release agent, or a long-chain alkyl-based release agent.
  • a silicone-based release agent such as a thermosetting type, an ultraviolet curing type, and an electron beam curing type
  • a fluorine-based release agent or a long-chain alkyl-based release agent.
  • a silicone-based release agent such as a thermosetting type, an ultraviolet curing type, and an electron beam curing type
  • fluorine-based release agent or a long-chain alkyl-based release agent.
  • a polymer of a long-chain alkyl acrylate having 12 or more carbon atoms a copolymer of a long-chain alkyl acrylate with another vinyl monomer, or a polyalkyl alcohol with a long-chain alkyl acrylate.
  • a long-chain alkyl component such as (g) a known release agent that satisfies the above-mentioned properties from known release agents
  • a UV-curable and electron-curable silicone-based release agent which does not require heat treatment when forming the release agent layer.
  • mosquito A thione polymerization type ultraviolet curing silicone release agent is preferable.
  • the thickness of the release agent layer formed on the surface of the substrate is not particularly limited, but is usually 0.05 to 4 5 ⁇ , and 0.1 to 4.0. im is preferred, and 0.3 to 1.5 / m is more preferred.
  • the release agent can be applied to either one side or both sides of the substrate. Further, the release agent can be applied to the entire surface of the substrate or only to a part thereof.
  • the method for applying the release agent to the substrate is not particularly limited, and for example, an appropriate coating apparatus such as a multi-hole method or an offset gravure method is used. can do.
  • the packaging material of the present invention has a release agent layer formed by applying a release agent to the surface of the base material and performing drying or various curing treatments (for example, ultraviolet irradiation or electron beam irradiation). Thereafter, a crack is formed in the release agent layer by stretching the packaging material.
  • a release agent layer formed by applying a release agent to the surface of the base material and performing drying or various curing treatments (for example, ultraviolet irradiation or electron beam irradiation). Thereafter, a crack is formed in the release agent layer by stretching the packaging material.
  • Such a stretching treatment method is not particularly limited, and a known stretching treatment method such as a tenter stretching method and a knurl stretching method, which is used for a normal plastic film stretching treatment, is appropriately selected and used. can do.
  • the stretching conditions are not particularly limited either, and the type of the base material is set so that the area ratio of the release agent layer cracks formed by the stretching process satisfies the specific range specified in the present invention.
  • the stretching conditions can be set according to the conditions.
  • the packaging material of the present invention can be stretched in advance before the sealing process. For example, after the adhesive material is packaged with the unstretched packaging material, the sealing material is stretched. Only the part can be stretched to form a crack in the release agent layer.
  • the area ratio of cracks per unit surface area of the release agent layer in the seal processing portion is 10% or more, and preferably 15%. / 0-95 . It must be / 0 .
  • the area ratio of the cracks per unit surface area of the release agent layer in the sealed area is lower than 10%, the adhesive strength of the sealed area is insufficient. And the hermeticity as a packaging material deteriorates.
  • the area ratio of the crack portion per unit surface area of the release agent layer in the seal processing portion is defined as the release agent layer surface S i ⁇ ⁇ line intensity of the seal processing portion under the same conditions as described above.
  • the color matching image was obtained by image analysis under the same conditions as described above.
  • a stretching process for forming the crack may be performed during the sealing process. That is, the packaging material of the present invention can be used to generate a crack in the release agent layer by the external force applied to the packaging material during the sealing process.
  • the sealing method in this case is not particularly limited.
  • a heating roll for heating through the sealing part of the packaging material (the part where the packaging material overlaps), and the stretching and sealing of the packaging material can be performed simultaneously.
  • Ri by the the child utilizing the shearing force between the rolls, c can be generated cracks in the release agent layer of the packaging material also convex portions on the surface heater Toshiruba one obtained by forming a (projections)
  • stretching of the packaging material and sealing can be performed simultaneously.
  • a crack can be generated in the release agent layer of the packaging material by stretching the packaging material at the convex portion of the heat seal bar.
  • Figs. 3a and 3b show electron micrographs of the packaging material of the present invention after heat sealing, peeling off the sealed part, and observing the surface of the release agent layer by SEM (Fig. 3a). : Magnification 100 ⁇ , Figure 3b: Magnification 300 ⁇ ).
  • the packaging material undergoes the same operation as stretching when the heat sealing process is performed (the packaging material is stretched). A crack is formed.
  • the packaging material of the present invention can be provided in a state where the packaging material has been stretched in advance, that is, in a state where a crack can be formed in the release agent layer and sealing can be performed, for example, as described above.
  • a packaging material in a state where stretching has not been performed, and after packaging an adhesive article with such a packaging material, perform a stretching process at the time of sealing to form a crack in the release agent layer.
  • FIG. 4 is an enlarged cross-sectional view schematically showing a case where the packaging material of the present invention is used as an individual packaging material (individually packed sheet) of a napkin with an adhesive.
  • the napkin B is packaged with the packaging material A that has not been stretched, the napkin B is stretched only in the sealing portion C, which is composed of the surfaces of the release agent layers of the packaging material, and the cracks in the release agent layer are formed. They are formed and sealed.
  • reference numeral 1 denotes a substrate
  • 2 denotes a release agent layer
  • 3 denotes an adhesive layer.
  • the method of sealing the packaging material after the stretching treatment is not particularly limited, and for example, a heat sealing (heat bonding) method or a press sealing method can be used.
  • the packaging material of the present invention uses the surface of the release agent layer on which the cracks are formed as a seal processing surface.
  • the sealing surface of the packaging material may be formed between the surfaces of the release agent layers of the packaging material, or the surface of the release agent layer and the surface of the base material (for example, when the release agent layer is formed). May be formed on the opposite side of the surface that has been set).
  • the sealing strength (measuring temperature of 23 ° C.) representing the adhesive strength of the sealing portion is 2 g Z 25 mm or more. Less than the breaking strength of the material.
  • the sealing strength is 5 g / 25 mm or more: 100 g g 25 mm.
  • the breaking strength of the base material refers to the strength when the base material is broken without peeling off from the sealing part when measuring the sealing strength, and refers to the state where the bonding strength of the sealing part is extremely strong. c If the seal strength is less than 2 g / 25 mm, the sealed part tends to peel off easily, and the sealability of the contents tends to deteriorate.
  • the packaging material of the present invention uses, in addition to the individual packaging material of the sanitary napkin with an adhesive shown in FIG. It can be used as a packaging material for direct packaging without the need.
  • UV-curable silicone release agent TPR650, manufactured by Toshiba Silicone Co., Ltd.
  • Photoinitiator UV-9310C, manufactured by Toshiba Silicone Corporation
  • the mold agent was applied to a thickness of 0.7 // m, and was irradiated with UV light to form a release agent layer, thereby producing a packaging material before the stretching treatment.
  • a release agent prepared by adding 100 parts by weight of an addition-reaction-type thermosetting silicone release agent and 2 parts by weight of a platinum-based curing catalyst to the entire surface of one side of a low-density polyethylene film with a thickness of 30 / m was applied to a thickness of 0.3 ⁇ m, and a release agent layer was formed in a hot-air drier to prepare a packaging material before the stretching treatment.
  • the packaging material (25 mm width ⁇ 100 mm length) before the stretching treatment obtained in Reference Example 1 was stretched by 100 ° / 0 with respect to the flow direction (MD direction) of the substrate. At this time, the stretching process is performed using a tensile tester at a tensile speed of 50 mm / min.
  • the packaging material (25 mm width x 100 mm length) obtained in Reference Example 1 before the stretching treatment was applied to the base material in the same direction as in Example 1 with respect to the flow direction (MD direction) of the base material. Stretched 50%.
  • the packaging material (25 mm width x 100 mm length) obtained in Reference Example 1 before the stretching treatment was applied to the base material in the same direction as in Example 1 with respect to the flow direction (MD direction) of the base material.
  • the film was stretched by 0%.
  • the surface of the release agent layer of the packaging material obtained in Reference Example 1 before the stretching treatment is superimposed on the release agent layer, and is heated by a heat-sealing machine having a heat-sealing bar having convex portions on the surface. Toseal processing was performed.
  • the packaging material is stretched at the convex portion of the heat seal bar, and the release agent layer at that portion is cracked, and sufficient sealing strength for practical use is obtained. A heat seal with was performed.
  • the sealing portion of the packaging material was peeled off, and the area ratio of the crack portion per unit surface area of the release agent layer in the sealing portion of one of the packaging materials was measured. The area ratio was 53%.
  • the packaging material before stretching (25 mm width x 100 mm length) obtained in Reference Example 1 was processed in the same manner as in Example 1 in the flow direction of the base material. (MD direction).
  • the packaging material (25 mm width x 100 mm length) obtained in Reference Example 1 before the stretching treatment was applied to the base material in the same direction as in Example 1 with respect to the flow direction (MD direction) of the base material.
  • the film was stretched by 0%.
  • the packaging material (25 mm width x 100 mm length) obtained in Reference Example 1 before the stretching treatment was applied to the base material in the same direction as in Example 1 with respect to the flow direction (MD direction) of the base material.
  • the film was stretched by 0%.
  • the surfaces of the release agent layers of each sample were overlapped, and heat sealing was performed using a heat sealer (TP-701S HEAT SEAL TESTER, TESTER SANGYO CO. LTD) under the following conditions. After the heat seal processing, the heat seal strength was measured at a tensile speed of 300 mm / min (T-peel test) using a tensile tester.
  • TP-701S HEAT SEAL TESTER, TESTER SANGYO CO. LTD After the heat seal processing, the heat seal strength was measured at a tensile speed of 300 mm / min (T-peel test) using a tensile tester.
  • the surface shape of the heat sealer of the heat sealer used in this evaluation was flat.
  • Attach adhesive tape (trade name: F-140BK: manufactured by Nitto Denko Corporation) to the surface of the release agent layer of the sample (10 mm width) by reciprocating a 2 kg roller once, and at room temperature. After standing for 30 minutes, the peeling force when the adhesive tape was peeled from the sample (packaging material) side was measured at a tensile speed of 300 mmZmin (180 ° peeling) using a tensile tester.
  • Table 1 shows the results.
  • the packaging materials of Examples 1 to 3 have an area ratio of cracks per unit surface area of the release agent layer formed by the stretching treatment within a specific range defined in the present invention. Because of the adjustment, even if the sealing surface is between the release agent layer surfaces, the release agent layer has sufficient heat seal strength and the release agent layer has releasability from the adhesive tape. You can see that it is.
  • the packaging material having a release function according to the present invention has the configuration as described above. By having this, even when the surface of the release agent layer is used as a seal processing surface, it is possible to perform sealing with sufficient adhesive strength, and the release agent layer has a sufficient adhesion to various adhesive articles. Peelability can be maintained.
  • a packaging material having a release function is produced without going through a complicated manufacturing process that has been conventionally used such that a release agent is not applied only to a seal processing portion. This is possible.
  • the step of forming a crack in the release agent layer is performed simultaneously with the sealing process. Since it can be performed, it is not necessary to stretch the packaging material in advance, and the workability of the sealing can be further improved.

Abstract

L'invention porte sur un matériau d'emballage à fonction de démoulage permettant l'emballage direct de différents articles adhésifs dans un état permettant de retirer ledit matériau d'emballage d'un article. Le matériau d'emballage présente une fonction de démoulage permettant de procéder à un scellage avec une force adéquate, même si la surface soumise à l'opération de scellage en même temps que le matériau d'emballage est la surface d'une couche d'agent de démoulage. La surface de la couche d'agent de démoulage se fissure habituellement lorsqu'on retire le matériau d'emballage. Le coefficient de fissuration par unité de surface de la couche de démoulage après retrait du matériau d'emballage est compris entre 10 et 80 %, tandis que ce coefficient est de 10 % ou plus dans la partie du matériau d'emballage ayant subi le scellage.
PCT/JP1998/000604 1997-02-18 1998-02-13 Materiau d'emballage a fonction de demoulage WO1998035884A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98902223A EP1010636A1 (fr) 1997-02-18 1998-02-13 Materiau d'emballage a fonction de demoulage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9/33526 1997-02-18
JP03352697A JP3836558B2 (ja) 1997-02-18 1997-02-18 離型機能を有する包装材料

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WO1998035884A1 true WO1998035884A1 (fr) 1998-08-20

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EP (1) EP1010636A1 (fr)
JP (1) JP3836558B2 (fr)
KR (1) KR20000071143A (fr)
CN (1) CN1252771A (fr)
TW (1) TW382611B (fr)
WO (1) WO1998035884A1 (fr)

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JP4736164B2 (ja) * 2000-08-10 2011-07-27 大日本印刷株式会社 電池用積層フィルムおよびそれを用いた電池用容器
JP3668439B2 (ja) * 2001-06-14 2005-07-06 ソニーケミカル株式会社 接着フィルム

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JPH0324949A (ja) * 1989-06-23 1991-02-01 Dainippon Printing Co Ltd 剥離テープおよび該剥離テープが貼着されている生理用ナプキン
JPH04284237A (ja) * 1991-03-12 1992-10-08 Dainippon Printing Co Ltd 生理用ナプキンの個別包装体用包装材料およびその製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102470961A (zh) * 2009-09-11 2012-05-23 Cj第一制糖株式会社 含有米糠的薄板及利用其的礼品套装用托盘

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EP1010636A1 (fr) 2000-06-21
JPH10230964A (ja) 1998-09-02
JP3836558B2 (ja) 2006-10-25
TW382611B (en) 2000-02-21
KR20000071143A (ko) 2000-11-25
CN1252771A (zh) 2000-05-10

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