WO2015186585A1 - Stratifié absorbant facile à découper, et sac d'emballage l'utilisant - Google Patents

Stratifié absorbant facile à découper, et sac d'emballage l'utilisant Download PDF

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Publication number
WO2015186585A1
WO2015186585A1 PCT/JP2015/065276 JP2015065276W WO2015186585A1 WO 2015186585 A1 WO2015186585 A1 WO 2015186585A1 JP 2015065276 W JP2015065276 W JP 2015065276W WO 2015186585 A1 WO2015186585 A1 WO 2015186585A1
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Prior art keywords
layer
film
absorbent
volume
laminate
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PCT/JP2015/065276
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English (en)
Japanese (ja)
Inventor
海里 山▲崎▼
和巳 新井
彰宏 木下
みどり 加藤
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共同印刷株式会社
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Priority to JP2016525124A priority Critical patent/JP6573607B2/ja
Publication of WO2015186585A1 publication Critical patent/WO2015186585A1/fr

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    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • B65D65/40—Applications of laminates for particular packaging purposes
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
    • B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators

Definitions

  • the present invention relates to an absorbent laminate that can be easily cut and a packaging bag using the same.
  • Patent Document 1 is formed from a laminate including an outer layer made of a polyethylene terephthalate film or the like, a gas barrier layer made of aluminum foil or the like, a moisture absorbing layer containing a polyolefin resin and a hygroscopic inorganic compound, and a gas block layer made of a polyolefin resin.
  • a packaging container is disclosed.
  • Patent Document 1 calcium oxide is used as a hygroscopic inorganic compound in the hygroscopic layer, which absorbs water and becomes calcium hydroxide.
  • the calcium hydroxide produced in this way reacts with carbon dioxide gas to produce calcium carbonate and water again. Therefore, by using the gas block layer, calcium hydroxide generated by absorbing water is prevented from coming into contact with carbon dioxide gas, thereby preventing water from being regenerated.
  • the gas block layer may further contain a hygroscopic inorganic compound such as zeolite or calcium chloride.
  • the blending amount thereof has not been studied, and specific examples actually blended are not disclosed.
  • Patent Document 2 discloses a packaging container formed from an absorbent laminate including a base material layer made of a polyethylene terephthalate film or the like, a gas barrier layer made of aluminum foil or the like, a polyethylene layer, and an absorbent layer (drying agent film). Yes.
  • this absorbent layer desiccant film
  • an intermediate layer desiccant film layer
  • two skin layers reinforcing layers
  • Patent Document 3 discloses a packaging container formed from an absorbent laminate including a polyethylene terephthalate film, an aluminum foil, an absorbent layer (desiccant film), and a polyacrylonitrile film in this order.
  • the absorption layer (desiccant film) has a three-layer structure in which both sides of an intermediate layer (desiccant film layer) made of a desiccant-containing resin are sandwiched by a skin layer made of a desiccant-containing resin. Yes.
  • Patent Documents 1 to 3 are manufactured by superposing packaging materials having heat-sealing properties and heat-sealing the periphery. At that time, by forming a notch or the like in the peripheral heat seal portion, the user can cut and open it.
  • Patent Documents 1 to 3 do not consider the ease of tearing (easy cut property) of the absorbent laminate and the packaging bag using the absorbent laminate.
  • the gas block layer made of low-density polyethylene in Patent Document 1 and the two skin layers made of linear low-density polyethylene in Patent Document 2 are layers having high viscoelasticity and difficult to tear, and tear the packaging bag. And could not be opened.
  • the polyacrylonitrile layer of Patent Document 3 is usually a film that is easy to tear.
  • a large force is required for tearing. Even if it is forcibly opened, the packaging material is stretched and the appearance of the tearing section is deteriorated.
  • easy cutting can be imparted to the packaging bag by easy cutting such as laser processing or porous processing, but in this case, there is a problem that the number of processing steps increases.
  • an object of the present invention is to provide an absorbent laminate and a packaging bag using the same, which can be easily manufactured, have high absorbency, and can be easily and nicely torn. It is another object of the present invention to provide an absorbent laminate and a packaging bag using the same, in which lami-floating is unlikely to occur between the barrier layer and the absorbent layer.
  • ⁇ 1> Absorbent laminate having the following layers in this order: A heat-sealable inner skin layer comprising an inorganic absorbent that is more than 10.2% by volume and not more than 60.0% by volume, and a thermoplastic resin; An intermediate layer including an inorganic absorbent that is greater than 10.2% by volume and equal to or less than 70.0% by volume; and a thermoplastic resin; An outer skin layer comprising a thermoplastic resin; and a barrier layer.
  • ⁇ 2> The laminate according to ⁇ 1>, wherein the tear strength in at least one direction is less than 5.0 N / mm.
  • ⁇ 3> The above ⁇ 1> or ⁇ 2>, wherein the heat seal strength is 6.0 N / 15 mm or more when the inner skin layers are folded and heat sealed at a temperature of 160 ° C., a pressure of 0.10 MPa for 1 second.
  • ⁇ 4> The laminate according to any one of ⁇ 1> to ⁇ 3>, wherein the inorganic absorbent in the outer skin layer is 10.0% by volume or less.
  • ⁇ 5> The laminate according to any one of ⁇ 1> to ⁇ 4>, wherein the inner skin layer has an inorganic absorbent content of 16.6% by volume to 35.3% by volume.
  • the inorganic absorbent of the intermediate layer and inner skin layer is zeolite, alumina, aluminum oxide, magnesium silicate, silica gel, calcium oxide, calcium chloride, calcium sulfate, magnesium sulfate, sodium sulfate, calcium carbonate, magnesium oxide, Barium oxide, diphosphorus pentoxide, magnesium perchlorate, potassium permanganate, sodium permanganate, sodium thiosulfate, iron powder, ferrous oxide, ferrous salt, sodium chloride, sodium bromide, sodium iodide , Potassium chloride, potassium bromide, potassium iodide, calcium chloride, magnesium chloride, barium chloride, oxygen-deficient cerium oxide, sulfite, bisulfite, nit
  • the barrier layer is an aluminum foil, an aluminum alloy foil, a polyethylene terephthalate film, a polyvinylidene chloride film, a polyacrylonitrile film, an ethylene-vinyl alcohol copolymer film, a polyamide film, an aluminum-deposited polyester film, an aluminum-deposited polypropylene film, Any of the above ⁇ 1> to ⁇ 7>, including a film selected from the group consisting of a silica / alumina-deposited polyester film, a silica / alumina-deposited polyamide film, a polyvinylidene chloride-coated polypropylene film, and a laminate film of two or more thereof The laminate according to claim 1.
  • ⁇ 9> The laminate according to any one of ⁇ 1> to ⁇ 8>, having a thickness of 60 to 200 ⁇ m.
  • the absorbent laminate of the present invention can provide a packaging bag that can be easily manufactured, has high absorbency, and can be easily cut. Moreover, even when the absorbent laminate of the present invention is torn by hand, there is no elongation or backlash of the resin film at the cut surface, and it can be torn relatively neatly.
  • the easy-cut absorbent laminate of the present invention comprises a heat-sealable inner skin layer containing an inorganic absorbent and a thermoplastic resin that is more than 10.2% by volume and not more than 60.0% by volume; 10.2% by volume An intermediate layer containing an inorganic absorbent and a thermoplastic resin that is super 70.0% by volume or less; an outer skin layer containing a thermoplastic resin; and a barrier layer.
  • the inner skin layer, the intermediate layer, and the outer skin layer are referred to as an absorption layer.
  • the laminate of the present invention preferably has a tear strength of less than 5.0 N / mm in one direction.
  • the laminate of the present invention has a tear strength of less than 5.0 N / mm in one direction, preferably both directions, in the flow direction (MD) and the width direction (TD) when forming the laminate. .
  • the thickness of the laminate of the present invention can be, for example, 250 ⁇ m or less, 200 ⁇ m or less, 150 ⁇ m or less, or 100 ⁇ m or less, or 50 ⁇ m or more, 60 ⁇ m, or 70 ⁇ m or more.
  • FIG. 1 shows a laminated structure of a laminate (100) according to one embodiment of the present invention.
  • a barrier layer (2) is laminated on an absorption layer (1) comprising an inner skin layer (11), an intermediate layer (12), and an outer skin layer (13).
  • (2) includes an aluminum foil layer (21) and a polyethylene terephthalate layer (22).
  • the absorbent layer includes an inner skin layer containing an inorganic absorbent and a thermoplastic resin, an intermediate layer containing an inorganic absorbent and a thermoplastic resin, and an outer skin layer containing a thermoplastic resin.
  • the intermediate layer contains more inorganic absorbent than the inner skin layer, and imparts high absorbency to the laminate.
  • a heat sealability is provided to a laminated body by laminating
  • the content of the absorbent in the intermediate layer can be made lower than the content of the inner skin layer.
  • these layers include a thermoplastic resin, and examples of the resin include polyolefin resins, and in particular, low density polyethylene (LDPE), linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), and high density.
  • Polyethylene (HDPE) polyethylene polymerized using metallocene catalyst, propylene homopolymer, propylene-ethylene block copolymer, propylene-ethylene random copolymer, polypropylene polymerized using metallocene catalyst, chlorinated polypropylene, polymethylpentene , Ethylene-acrylic acid copolymer (EEA), ethylene-methacrylic acid copolymer (EMAA), ethylene-ethyl acrylate copolymer (EEA), ethylene-methyl acrylate copolymer (EMA), ethylene-ethyl acrylate Polymer, ethylene-vinyl acetate copolymer (EVA), ionomer, carboxylic acid-modified polyethylene, carboxylic acid-modified poly
  • moisture, organic and inorganic gases such as carbon dioxide, ammonia, hydrogen sulfide, oxygen, chlorine, hydrogen chloride and the like can be mentioned.
  • Examples of the inorganic absorbent contained in the inner skin layer and the intermediate layer include calcium oxide, calcium chloride, calcium sulfate, magnesium sulfate, sodium sulfate, calcium carbonate, magnesium oxide, barium oxide, diphosphorus pentoxide, magnesium perchlorate, Examples include chemical adsorbents such as potassium manganate, sodium permanganate, and sodium thiosulfate, and physical adsorbents such as alumina, aluminum oxide, magnesium silicate, quicklime, silica gel, and inorganic molecular sieves.
  • inorganic molecular sieves include, but are not limited to, aluminosilicate minerals, clays, porous glass, microporous activated carbon, zeolite, activated carbon, or compounds having an open structure capable of diffusing small molecules such as water. Can be mentioned.
  • iron powder for example, reduced iron powder, sprayed iron powder, activated iron powder, etc.
  • iron-based oxygen absorbers such as ferrous oxide and ferrous salts, metal halides (for example, chloride) Sodium, sodium bromide, sodium iodide, potassium chloride, potassium bromide, potassium iodide, calcium chloride, magnesium chloride, barium chloride, etc.
  • oxygen-deficient cerium oxide for example, sulfite, bisulfite, nitrite, etc. Mention may also be made of oxygen scavengers.
  • the average particle size of the inorganic absorbent is not particularly limited.
  • the volume average particle size is 100 nm or more and 500 nm or more. It may be 1 ⁇ m or more, or 5 ⁇ m or more, or 100 ⁇ m or less, 50 ⁇ m or less, 30 ⁇ m or less, or 15 ⁇ m or less.
  • the above-mentioned inorganic absorbent can be properly used according to the object to be absorbed, the properties of the contents, the surface roughness of the inner skin layer, the intended absorption rate, and the like.
  • the absorption layer can be manufactured by a multilayer inflation method. This is a method for producing a multilayer film by extruding a plurality of resins into a tube shape at the same time by a plurality of extruders and sending the air into the tubes to inflate them.
  • the intermediate layer of the absorption layer is formed into a film or sheet by performing inflation method, T-die method, calendar method, casting method, press molding, extrusion molding or injection molding, and the outer skin layer and / or inner skin layer
  • an absorbent layer can be produced by laminating with an intermediate layer interposed therebetween.
  • the intermediate layer is produced by the inflation method, it is preferable to heat and knead the thermoplastic resin and the inorganic absorbent with a biaxial kneader, and then process into a pellet to obtain a resin for the intermediate layer and the inner skin layer.
  • a composition pellet
  • the content of the inorganic absorbent may be adjusted by dry blending the pellets and the thermoplastic resin pellets.
  • a multilayer film is formed by an inflation method to produce an absorbent layer.
  • an absorption layer may be obtained by laminating a film that will be separately manufactured as the inner and outer skin layers by thermocompression bonding or the like.
  • the intermediate layer and skin layer films can be formed after a master batch is prepared in advance.
  • the absorbent layer may be obtained by co-extruding the skin layer on both surfaces or one surface of the intermediate layer, or by laminating a film to be the skin layer by thermocompression bonding or the like.
  • the thickness of the absorption layer is, for example, 200 ⁇ m or less, 180 ⁇ m or less, 150 ⁇ m or less, or 100 ⁇ m or less, and 30 ⁇ m or more, 40 ⁇ m, or 50 ⁇ m or more.
  • the inner skin layer is located in the outermost layer (the innermost layer of the packaging bag) of the easily cut absorbent laminate of the present invention, and imparts heat sealability to the laminate of the present invention.
  • the inner skin layer contains the inorganic absorbent, the easy-cut property and the saturated absorption amount of the absorbent laminate can be improved.
  • the inner skin layer which is the innermost layer, contains an inorganic absorbent and becomes easy to cut, so that the entire absorbent laminate is easily cut. I found it to be sex.
  • the following mechanism can be considered as the reason that the inner skin layer, which is the innermost layer, contains an inorganic absorbent, whereby the entire absorbent laminate becomes easily cut.
  • a thermoplastic resin film with strong viscoelasticity is difficult to tear because of its strong bond
  • a resin film mixed with an absorbent is made of a thermoplastic resin alone by dispersing granular absorbent. It is considered that the bond is loosened rather than the film, and the physical strength against stress such as tearing, pulling, and piercing is weakened.
  • the surface of the inner skin layer becomes rough, and the unevenness of the roughened surface is subjected to torsional stress, so that cracks can easily occur and propagation of tears can be improved. Conceivable.
  • the inner skin layer can contain a large amount of an inorganic absorbent.
  • the inner skin layer contains more than 10.2% by volume, 11.0% by volume or more, 15.0% by volume or more, 16 .6% by volume or more, or 20.0% by volume or more and 60.0% by volume or less, 50.0% by volume or less, less than 45.6% by volume, 45.0% by volume or less, 40.0% by volume or less Or an inorganic absorbent in the range of 35.3 volume% or less.
  • the content of the inorganic absorbent is increased, the heat sealability tends to be impaired, and it is necessary to appropriately select the type of resin, the heat seal temperature, the layer thickness, and the like. If it exceeds 60% by volume, it becomes difficult to impart heat sealability.
  • the specific gravity of the inorganic absorbent is unclear, the specific gravity of the layer is obtained by measurement, the measured value, the inorganic absorbent and You may obtain
  • the specific gravity of a layer formed using 50 g of an inorganic absorbent and 50 g of a thermoplastic resin having a specific gravity of 0.90 g / cm 3 is 1.10 g / cm 3 , it is included in the layer.
  • the inorganic absorbent can be calculated to have a specific gravity of 1.41 g / cm 3, and it can be said that 38.9% by volume of the inorganic absorbent is present in the layer.
  • the resin used for the inner skin layer is preferably selected from crystalline resins among the above-mentioned resins in order to impart heat sealability.
  • the heat seal strength between the inner skin layers when the inner skin layers are heat sealed at a temperature of 160 ° C., a pressure of 0.10 MPa for 1 second, 6.0 N / 15 mm or more, 8.0 N / 15 mm or more, preferably 10.0 N / 15 mm or more, 15.0 N / 15 mm or more, or 20.0 N / 15 mm or more.
  • the appropriate strength of the general packaging material is light weight-small size-normal strength is 6 N / 15 mm or more, and weight-large size-strong strength is 15 N / 15 mm or more.
  • the thickness of the inner skin layer is, for example, 30 ⁇ m or less, 20 ⁇ m or less, or 15 ⁇ m or less, and 5 ⁇ m or more, or 8 ⁇ m or more.
  • the intermediate layer can be made not more than the content of the inorganic absorbent in the inner skin layer, but is preferably made not less than the content of the inorganic absorbent in the inner skin layer. From the viewpoint of the absorbed amount of the substance to be absorbed and easy cutability, and film formation stability, the intermediate layer contains more than 10.2% by volume, 11.0% by volume or more, 15.0% by volume or more, or 20.0%.
  • the inorganic absorbent can be contained in the range of not less than volume% and not more than 70.0 volume%, not more than 60.0 volume%, or not more than 50.0 volume%.
  • the thickness of the intermediate layer is, for example, 10 ⁇ m or more, 20 ⁇ m or more, or 30 ⁇ m or more, and is 150 ⁇ m or less, 100 ⁇ m or less, or 80 ⁇ m or less.
  • the outer skin layer preferably does not contain an inorganic absorbent from the viewpoint of bonding with the barrier layer. If the outer skin layer contains a large amount of inorganic absorbent, the surface of the outer skin layer becomes rough and the barrier layer and the outer skin layer are likely to dissociate, and so-called lami-floating tends to occur. Even if it is contained, it is preferable that it becomes 10.0 volume%, 7.0 volume%, 5.0 volume%, 3.0 volume%, or 1.0 volume% or less in the layer. If it is 10.0% by volume or less, the surface of the outer skin layer will not become very rough, so there is almost no occurrence of lami-floating between the barrier layer and in the case of 7.0% by volume or less. The effect is particularly high.
  • the thickness of the outer skin layer is, for example, 20 ⁇ m or less, or 15 ⁇ m or less, and 5 ⁇ m or more, or 8 ⁇ m or more.
  • the outer skin layer contains almost no inorganic absorbent, and is usually made of a resin that has high viscoelasticity and cannot be easily cut, such as low-density polyethylene. It has been found that it does not significantly affect the overall easy-cutability. This is because the outer skin layer is relatively thin, and it is pressed by the upper and lower layers that contact the outer skin layer and cannot be stretched. It is thought that it can be torn together with the layer.
  • the barrier layer is a layer for isolating the absorption layer from the external environment.
  • a barrier layer is located outside the bag.
  • the barrier layer preferably imparts appropriate stiffness, strength and the like in addition to imparting barrier properties to the laminate of the present invention.
  • the barrier layer is also easily cut so that the laminate of the present invention can be easily cut. However, at least one layer of the barrier layer may not be easily cut.
  • barrier layer examples include metal foils, resin films (for example, stretched resin films), and laminates thereof. Particularly, aluminum (Al) foils, aluminum alloy foils, polyethylene terephthalate (PET) films, polyvinylidene chloride. (PVDC) film, polyacrylonitrile (PAN) film, ethylene-vinyl alcohol copolymer (PVA) film, polyamide (for example, nylon (registered trademark), nylon 6, nylon MXD6) film, and a laminate film of two or more thereof
  • the barrier layer can be a laminated film of a PET film and an Al foil.
  • the PET film is the outermost layer
  • the Al foil is positioned on the absorption layer side.
  • thermoplastic resin film having at least a vapor-deposited layer of metal, metalloid or oxide thereof or a halogenated polymer layer can be used alone or in combination with the above film.
  • the vapor deposition layer of metal, metalloid or oxide thereof include aluminum vapor deposition film, silica vapor deposition film, alumina vapor deposition film, silica / alumina binary vapor deposition film, and the like.
  • Halogenated polymer layer examples thereof include a polyvinylidene chloride coating film and a polyvinylidene fluoride coating film.
  • polyolefin resins particularly stretched or unstretched polypropylene
  • polyvinyl chloride saturated polyesters (for example, polyethylene terephthalate (PET), polybutylene terephthalate), polyamides (for example, nylon (registered trademark)) , Nylon 6 and nylon MXD6).
  • saturated polyesters for example, polyethylene terephthalate (PET), polybutylene terephthalate
  • polyamides for example, nylon (registered trademark)
  • Nylon 6 and nylon MXD6 nylon MXD6
  • the film is preferably a stretched film from the viewpoint of easy cutability.
  • the film is preferably an unstretched film, when it is thin, when using it by laminating
  • the barrier layer is a laminated film
  • known lamination methods such as dry lamination, sand lamination, extrusion lamination, and hot melt method can be used as the lamination method.
  • the thickness of the barrier layer can be set to, for example, 200 ⁇ m or less, 150 ⁇ m or less, or 100 ⁇ m or less from the viewpoint of maintaining easy cutting properties and barrier properties and giving strength and the like to the entire laminate of the present invention, and 20 ⁇ m. As mentioned above, it can be set to 30 ⁇ m or 50 ⁇ m or more.
  • the thickness of the resin film can be, for example, 8 ⁇ m or more, 10 ⁇ m or more, or 15 ⁇ m or more, It can be 100 ⁇ m or less, 50 ⁇ m or less, or 30 ⁇ m or less.
  • the thickness of the metal foil can be, for example, 6 ⁇ m or more, 9 ⁇ m or more, or 12 ⁇ m or more, and can be 100 ⁇ m or less, 80 ⁇ m or less, or 50 ⁇ m or less.
  • the thickness of the resin film is preferably small.
  • dry lamination is a method in which an adhesive is applied to one film and dried, and then the other film is overlaid and pressed to cure and bond the adhesive.
  • Extrusion laminating is a method in which a melted polyethylene resin or the like is extruded and bonded between two films.
  • the easy-cut absorbent laminate of the present invention has a reinforcing layer for imparting appropriate stiffness, strength, etc. to the laminate between any two layers, as long as the easy-cut property can be maintained.
  • An adhesion layer for enhancing adhesion, a primer layer, an anchor coat layer, and the like may be included.
  • the easy-cut absorbent laminate of the present invention may have a relatively thin coat layer outside the barrier layer.
  • a coating layer include an anti-blocking layer, a UV cut coating layer, a waterproof / moisture-proof coating layer, a slip coating layer, an anti-slip coating layer, a gloss layer, a matte coating layer, an antistatic coating layer, and the like. it can.
  • the packaging bag of this invention can be formed using said absorbent laminated body.
  • the packaging bag may be formed by heat-sealing the absorbent laminates described above, or a heat-sealable and barrier film or laminated film, and the absorbent laminate described above. And may be formed by heat sealing.
  • This packaging bag can be used to enclose medicines, pharmaceutical parts, in-vitro diagnostics, medical equipment, hygiene products, precision equipment, electronic devices, cosmetics, foods, and the like.
  • LLDPE manufactured by Prime Polymer Co., Ltd., Evolution SP2520
  • LDPE Aligni Kasei Chemicals Co., Ltd.
  • 9 ⁇ m aluminum foil UACJ Foil Co., Ltd., BESPA
  • Suntech L1850K manufactured by the company was extruded to a thickness of 15 ⁇ m and sand laminated to obtain an absorbent laminate.
  • Embret PC manufactured by Unitika Co., Ltd.
  • 9 ⁇ m aluminum foil manufactured by UACJ, BESPA
  • ⁇ Laminated body of Comparative Example 19> A laminated film of Comparative Example 19 was obtained in the same manner as Comparative Example 1, except that a 40 ⁇ m LLDPE sealant film (L-185, manufactured by Aicello Co., Ltd.) was used instead of the absorbent layer.
  • L-185 manufactured by Aicello Co., Ltd.
  • ⁇ Film of Comparative Example 20 As the film of Comparative Example 20, an unstretched polypropylene (CPP) film (manufactured by Mitsubishi Plastics Co., Ltd., Superfoil E0020NA) was used.
  • CPP polypropylene
  • ⁇ Laminated body of Comparative Example 21> A 30 ⁇ m thick PAN film (manufactured by Tamapoly Co., Ltd., Hytron BX) was further laminated on the inner skin layer side of the laminates of Comparative Examples 1 and 15 by dry lamination to obtain the laminates of Comparative Example 21, respectively. It was.
  • the tear strength was measured based on the trouser tear method according to JIS K7128-1.
  • a strograph VES1D manufactured by Toyo Seiki Seisakusho Co., Ltd. a sample size of 115 mm ⁇ 50 mm and a slit of 45 mm in the longitudinal direction, a test speed of 200 mm / min, a distance between grips of 75 mm, a measurement distance of 150 mm, and an inner skin Measurement was performed with the layer facing upward, and the average of three measurements was used. The measured value in this case was obtained by reading the section average load N and dividing it by the thickness of the sample.
  • the heat seal strength was measured according to JIS Z0238. In this example, using a strograph VE10D manufactured by Toyo Seiki Seisakusho Co., Ltd., the sample size is 15 mm wide and the developed length is 100 mm or more. The average value of these three measurements was used.
  • the saturated absorption amount was evaluated as follows. First, a non-woven fabric soaked in water was laid in a bottle and placed in a 60 ° C. oven to prepare a hot and humid environment. Next, a 10 cm square sample whose weight before moisture absorption was measured in advance was put in a bottle and stored in an oven at 60 ° C. for 14 hours. After storage, the sample was taken out, the moisture on the surface was wiped off, allowed to stand for 3 hours in an environment at a temperature of 23 ° C. and a relative humidity of 50%, and the weight after moisture absorption was measured. The saturated absorption amount was converted from the weight change before and after moisture absorption.
  • Examples 15 to 16 have better cutability but are not high in heat sealability. This is presumably because the content of the inorganic absorbent in the inner skin layer is high.
  • Comparative Example 19 is a laminate conventionally used for packaging bags, but since the entanglement between molecules of LLDPE is strong and the surface is relatively smooth, cracks are difficult to enter, so easy cutting It is estimated that the sex is extremely bad.
  • Comparative Example 20 is an unstretched polypropylene film that is often used for blister packs, PTPs (press-through packs), etc., and has high viscoelasticity and is easy to stretch because it is a thick film. I could't.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
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  • Laminated Bodies (AREA)
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Abstract

L'objet de la présente invention est de pourvoir à un stratifié absorbant présentant une capacité d'absorption élevée et pouvant être facilement découpé. Ce stratifié absorbant comprend les couches suivantes, dans l'ordre qui suit : une couche de revêtement interne thermoscellable qui contient une résine thermoplastique et une proportion supérieure à 10,2 % en volume et inférieure ou égale à 60,0 % en volume d'un absorbant inorganique ; une couche intermédiaire qui contient une résine thermoplastique et une proportion supérieure à 10,2 % en volume et inférieure ou égale à 70,0 % en volume d'un absorbant inorganique ; une couche de revêtement externe qui contient une résine thermoplastique ; et une couche barrière.
PCT/JP2015/065276 2014-06-05 2015-05-27 Stratifié absorbant facile à découper, et sac d'emballage l'utilisant WO2015186585A1 (fr)

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JP2016525124A JP6573607B2 (ja) 2014-06-05 2015-05-27 易カット性の吸収性積層体、及びそれを用いた包装袋

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JP2014-116994 2014-06-05
JP2014116994 2014-06-05

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JP2017164953A (ja) * 2016-03-15 2017-09-21 スタープラスチック工業株式会社 包装体用フィルム及びこれを用いた包装体
JP2017171739A (ja) * 2016-03-22 2017-09-28 共同印刷株式会社 吸湿フィルム
JP2017213809A (ja) * 2016-06-01 2017-12-07 共同印刷株式会社 酢酸吸着フィルム積層体
JP2018034875A (ja) * 2016-09-01 2018-03-08 共同印刷株式会社 酸素吸収性フィルム
JP2019010775A (ja) * 2017-06-29 2019-01-24 共同印刷株式会社 吸湿及びガス吸着用フィルム、並びに包装用積層体
JP2019010768A (ja) * 2017-06-29 2019-01-24 共同印刷株式会社 吸湿及びガス吸着用フィルム、並びに包装用積層体
CN110696461A (zh) * 2019-10-09 2020-01-17 安徽国风塑业股份有限公司 一种高热封强度耐穿刺bopp薄膜及其制备方法
CN111038054A (zh) * 2019-12-23 2020-04-21 常州市华健药用包装材料股份有限公司 一种基于温敏技术的可视化环保药用复合膜及其加工工艺
JP2020175934A (ja) * 2019-04-19 2020-10-29 共同印刷株式会社 易剥離性透明蓋材
JP7543800B2 (ja) 2020-09-17 2024-09-03 大日本印刷株式会社 医薬品または食品包装用の易手切れ性吸湿積層体

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017164953A (ja) * 2016-03-15 2017-09-21 スタープラスチック工業株式会社 包装体用フィルム及びこれを用いた包装体
JP2017171739A (ja) * 2016-03-22 2017-09-28 共同印刷株式会社 吸湿フィルム
JP2017213809A (ja) * 2016-06-01 2017-12-07 共同印刷株式会社 酢酸吸着フィルム積層体
JP2018034875A (ja) * 2016-09-01 2018-03-08 共同印刷株式会社 酸素吸収性フィルム
JP2019010775A (ja) * 2017-06-29 2019-01-24 共同印刷株式会社 吸湿及びガス吸着用フィルム、並びに包装用積層体
JP2019010768A (ja) * 2017-06-29 2019-01-24 共同印刷株式会社 吸湿及びガス吸着用フィルム、並びに包装用積層体
JP2020175934A (ja) * 2019-04-19 2020-10-29 共同印刷株式会社 易剥離性透明蓋材
CN110696461A (zh) * 2019-10-09 2020-01-17 安徽国风塑业股份有限公司 一种高热封强度耐穿刺bopp薄膜及其制备方法
CN110696461B (zh) * 2019-10-09 2021-11-09 安徽国风塑业股份有限公司 一种高热封强度耐穿刺bopp薄膜及其制备方法
CN111038054A (zh) * 2019-12-23 2020-04-21 常州市华健药用包装材料股份有限公司 一种基于温敏技术的可视化环保药用复合膜及其加工工艺
JP7543800B2 (ja) 2020-09-17 2024-09-03 大日本印刷株式会社 医薬品または食品包装用の易手切れ性吸湿積層体

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