WO2006049070A1 - 開封容易な袋 - Google Patents
開封容易な袋 Download PDFInfo
- Publication number
- WO2006049070A1 WO2006049070A1 PCT/JP2005/019752 JP2005019752W WO2006049070A1 WO 2006049070 A1 WO2006049070 A1 WO 2006049070A1 JP 2005019752 W JP2005019752 W JP 2005019752W WO 2006049070 A1 WO2006049070 A1 WO 2006049070A1
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- WO
- WIPO (PCT)
- Prior art keywords
- film
- bag
- polystyrene
- resin
- heat
- Prior art date
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Classifications
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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
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/06—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
-
- 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/082—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising vinyl resins; comprising acrylic resins
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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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
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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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- 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
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/14—Layered products comprising a layer of natural or synthetic rubber comprising synthetic rubber copolymers
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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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
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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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
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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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
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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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- 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
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- 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
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/52—Details
- B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
- B65D75/5805—Opening or contents-removing devices added or incorporated during package manufacture for tearing a side strip parallel and next to the edge, e.g. by means of a line of weakness
-
- 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
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/52—Details
- B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
- B65D75/5827—Tear-lines provided in a wall portion
-
- 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
- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/514—Oriented
- B32B2307/518—Oriented bi-axially
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/702—Amorphous
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
- B32B2307/7246—Water vapor barrier
-
- 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
- B32B2439/00—Containers; Receptacles
- B32B2439/40—Closed containers
- B32B2439/46—Bags
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1355—Elemental metal containing [e.g., substrate, foil, film, coating, etc.]
Definitions
- the present invention relates to a bag that can be easily opened, has a high gas barrier property, and can be easily and linearly opened during long-term storage, and can be taken out with certainty. It is about.
- a bag in which a mouth fan and polyethylene are laminated is generally used. These bags are heat sealed with the cellophane side positioned on the outside of the bag and the polyethylene film side positioned on the inside of the bag. Compared to bags using other films as surface material, they can be torn from the edge and are used as easy-open bags.
- the tear surface may shift in a direction different from the torn direction, and the contents are spilled or difficult to take out.
- Cellophane is originally made of cellulose and absorbs a lot of water. Absorbing moisture caused the laminated film to curl greatly, and there were many losses when making the laminated film.
- the contents become wet by absorbing moisture. For example, in a bag containing powder, etc., the powder was moistened, and there was a risk of alteration of the drug that was difficult to remove after opening.
- cellophane has different film stiffness and impact resistance depending on its moisture absorption. As a result, there was a loss during bag making and laminating, and it was easily broken by impact, and pinholes occurred at the folded part. These caused the contents to spill out, especially in the case of pharmaceuticals.
- thermoplastic resin film in place of cellophane, and this is combined with a polyolefin film having heat sealability.
- Patent Document 1 a technique in which a laminated film is made by laminating and heat-sealed to make an easy-open bag.
- An invention aiming for easy-opening by laminating a generally widely used resin film such as a polypropylene film or a polyester film and an easily tearable film such as a polystyrene film, and using the laminated film as a base film.
- Patent Document 4 An invention aiming for easy-opening by laminating a generally widely used resin film such as a polypropylene film or a polyester film and an easily tearable film such as a polystyrene film, and using the laminated film as a base film.
- Patent Document 4 since this invention uses a film aiming at general resistance to tearing, it is only a superposition of films having contradictory performance, and the bow I tearability and straight tearing performance are bad. .
- Patent Document 1 Japanese Patent Application Laid-Open No. 63-79
- Patent Document 2 Japanese Patent Laid-Open No. 11 171196
- Patent Document 3 Japanese Patent Laid-Open No. 5-338089
- Patent Document 4 JP-A-10-166529
- the present invention has excellent processability such as no wrinkles or deformation when processed into a bag, can be easily opened linearly in the same direction as the tear direction, and the contents are more simple and reliable.
- the purpose is to provide a bag that can be taken out. Furthermore, the purpose of the present invention is to provide a bag having a high storage stability of the contents by improving the moisture-proof effect by making aluminum foil in the inner layer. Means for solving the problem
- the present invention is as follows.
- Vicat soft temperature including amorphous polystyrene copolymer resin is 110-155 ° C
- a bag comprising a laminated film of a biaxially stretched polystyrene film and a polyethylene film, wherein the biaxially stretched polystyrene film is disposed outside the bag and the polyethylene film is disposed inside the bag.
- Amorphous polystyrene copolymer resin is made from styrene-acrylic acid copolymer resin, styrene-methacrylic acid copolymer resin, styrene-maleic anhydride copolymer resin, and styrene- ⁇ -methylstyrene copolymer resin.
- Biaxially stretched polystyrene film strength At least one kind of polystyrene copolymer elastomer selected from high impact polystyrene, styrene mono-conjugated gen copolymer, and styrene aliphatic carboxylic acid copolymer, 0.5
- the present invention when processing into a bag, it has excellent processability such as no wrinkles or deformation, can be easily opened linearly in the same direction as the opened direction, and the contents can be more A bag that can be easily and reliably removed can be provided.
- the moisture-proof effect is excellent and the storage stability of the contents is improved.
- the biaxially stretched polystyrene film used in the present invention comprises an amorphous polystyrene copolymer resin.
- the weight ratio of the amorphous polystyrenic copolymer resin in the biaxially stretched polystyrene film is preferably 65 wt% or more, more preferably 70 wt% or more.
- the biaxial softening temperature of the biaxially stretched polystyrene film made of an amorphous polystyrene copolymer resin used in the present invention is 110 to 155 ° C, preferably 113 to 147 ° C, more preferably 120. ⁇ 140 ° C.
- the Vicat softening temperature of the film is measured according to ASTM-D-1525.
- Vicat soft temperature is higher than 110 ° C, the rigidity of the bag will be moderately high, straight tearing and tearing (tearability that can be easily torn by hand without notching the film) ) Is particularly good.
- heat shrinkage occurs in the heat-sealed part of the heat seal that is processed into a bag that hardly undergoes heat shrinkage in the polystyrene film.
- the shape of the bag is not distorted, and pinholes do not occur in the heat seal area.
- the Vicat soft temperature of the film is lower than 155 ° C, moderate bag toughness is obtained, and when the bag is subjected to an impact, it is not easily torn or pinholes occur.
- the bag can be provided with sufficient tear straightness and tearability.
- the amorphous polystyrene copolymer resin is not limited and may be a styrene copolymer resin alone, or various resin additives may be added to the styrene copolymer resin.
- the styrene copolymer resin is obtained by copolymerizing a styrene monomer and an arbitrary monomer. Specifically, 0-methylol styrene, m-methylol styrene, p-methylol styrene, tert-butyl styrene, a-methyl styrene, 13-methyl styrene, styrene derivatives such as diphenylethylene, butadiene, Conjugated gens such as isoprene, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butynomethacrylate, hexenomethacrylate, alkyl-substituted methacrylate compounds such as cyclohexylmethacrylate, methyl acrylate, Til acrylate, propyl acrylate, butyl acrylate, hexyl acrylate
- styrene-acrylic acid copolymer resin In order to give heat resistance and improve the tearability and stiffness of the obtained bag, styrene-acrylic acid copolymer resin, styrene-methacrylic acid copolymer resin, styrene-maleic anhydride copolymer resin And at least one copolymer resin selected from styrene-OC-methylstyrene copolymer resin is more preferred.
- the weight ratio of styrene to form the amorphous polystyrene copolymer resin is preferably 50 wt% or more, more preferably the Vicat soft temperature of the present invention within the range of 110 to 155 ° C. Is over 70wt%.
- the weight ratio of these styrenes is not limited because it varies depending on the ratio of monomers other than styrene to be copolymerized and the additives that can be obtained when making a biaxially stretched polystyrene film.
- the Vicat softening temperature of a biaxially stretched polystyrene film made of amorphous polystyrene copolymer resin is set to 110 to 155 ° C.
- the copolymerization ratio of the resin is preferably 3 to 30 wt%.
- ⁇ -methylstyrene it is preferably 9 to 50 wt%.
- the amorphous polystyrene copolymer resin preferably has a atactic structure or a isotactic structure.
- “amorphous” means that the crystallinity is 10% or less.
- the degree of crystallinity is preferably 5% or less, and the closer to complete amorphousness, the better.
- the degree of crystallinity can be measured by a differential scanning calorimetry method (DSC method) that can be generally calculated from the crystal melting exotherm. If it is amorphous, the crystallinity of coconut resin is low, so that crystallization due to heat does not occur during pollamination with polyolefin after being whitened when making a film or when making bags.
- DSC method differential scanning calorimetry method
- the production method of the amorphous polystyrene copolymer resin is not limited, and a known production method can be used.
- Typical styrene polymer polymerization methods include, for example, radical solution polymerization using heat and initiator, radical suspension polymerization, radical emulsion polymerization, ion polymerization using an organometallic compound, and coordination using a transition metal complex. There are methods such as ion polymerization and cationic polymerization using Lewis acid.
- styrene / methacrylic acid copolymer resin trade name: G9001 manufactured by Polystyrene Japan Co., Ltd., Rurex (registered trademark) manufactured by Dainippon Ink & Chemicals, Inc. ) A-14
- Styrene Maleic anhydride copolymer resins include NOVA, DYLARK (registered trademark) 232, 332, and the like. However, it is not limited to these oils.
- the molecular weight of the amorphous polystyrene-based copolymer resin is not limited as long as a sufficient melt viscosity can be obtained when forming a film.
- the styrene-based low molecular weight components such as monomers, dimers, and trimers remaining in the obtained biaxially stretched polystyrene film are not limited, but a lower one is preferable considering that the contents are pharmaceuticals and foods. Oppm or less is preferable.
- amorphous resins may be added to the amorphous polystyrene copolymer resin for the purpose of imparting film-forming properties and impact resistance as long as the requirements and characteristics of the present invention are not impaired.
- any resin compatible with the amorphous polystyrene copolymer resin may be used, for example, ABS resin, PPE resin, polystyrene elastomer and the like. From the viewpoint of compatibility, a polystyrene-based elastomer is preferred.
- a polystyrene elastomer is a substance that imparts impact resistance to film formation on an amorphous polystyrene copolymer resin, and generally refers to a substance that has rubber elasticity at room temperature and has elasticity in the molecule. Those having the rubber component (soft segment) shown.
- the Vicat soft temperature of polystyrene elastomers is lower than the Vicat soft temperature of polystyrene (105 ° C), typically below 90 ° C.
- polystyrene elastomers examples include high impact polystyrene, styrene monoconjugate copolymers, styrene aliphatic carboxylic acid copolymers, and the like, and at least one polystyrene elastomer selected from these forces is added. It is a more preferable aspect to add.
- the polystyrene elastomer is preferably added in an amount of 0.5 to 35 wt% in the biaxially stretched polystyrene film, more preferably 1 to 30 wt%.
- the added amount is 0.5 wt% or more, the film-forming property is stabilized when forming a film, and the impact resistance of the obtained bag is improved.
- the addition amount is 35 wt% or less, the bag has good tearability, heat resistance, waist, and high transparency. It is preferable that those involved in the polystyrene-based elastomer are appropriately selected by the parties as long as they do not impair the requirements of the present invention.
- Stabilizers such as heat stabilizers, antioxidants, light-proofing agents, antistatic agents, etc. to increase thermal stability, mechanical stability, weather resistance, and light resistance to amorphous polystyrene copolymer resins It is also effective to supplement Examples of heat stabilizers, antioxidants, and light-proofing agents include phenolic, amine-based, phosphorus-based, xio-based, hindered amine-based stabilizers, and the like, as long as the purpose and characteristics of the present invention are not impaired. It is preferable to add these stabilizers.
- additives such as fine-particle antiblocking agents such as inorganic fine particles and organic fine particles, plasticizers, lubricants, colorants, antistatic agents and the like are used as requirements and characteristics of the present invention. It is possible to mix
- the method for producing the biaxially stretched polystyrene film is not limited, but the tenter is obtained by melting the resin and extruding it from a T-die or the like, longitudinally stretching the raw material with a stretching roll, and then laterally stretching with a tenter. Or a method of extruding and stretching the circular die force.
- the film needs to be a biaxially stretched film. In other words, by stretching the film biaxially in the flow (MD) direction and the width (TD) direction, it is possible to make an easily tearable bag that easily tears the resulting bag in any direction by hand. it can.
- the polystyrene copolymer resin of the present invention by using the polystyrene copolymer resin of the present invention and further controlling the orientation of the molecules of these resin, it can be easily torn by hand and the tear straightness is improved. If the orientation of the oleaginous molecule is high, the tearing property at the beginning of tearing increases, it becomes easier to tear by hand, and the orientation of the molecule occurs in the direction of tearing. Property is improved.
- the heat shrinkage stress of the biaxially stretched polystyrene film of the present invention is 300 to 6000 KPa force S in any direction from the viewpoint of the elasticity of the resulting film, heat shrinkability and tearability. Preferred 400 to 4000 KPa force S More preferred. Heat shrinkage stress is measured by the method described later. In the present invention, the straightness of tearing and the good tearability depend on the molecular orientation of the resin, but as an index that can quantitatively represent the molecular orientation, heat shrinkage stress can be mentioned.
- the bag when the heat shrinkage stress of the polystyrene-based resin film of the present invention is 300 KPa or more, the bag does not easily be bent or cracked against an external force that is strong in bending resistance if the impact strength of the bag is high. .
- the orientation of the rosin polymer is sufficiently obtained, the straight tearability and tearability of the bag are improved. If it is 6000KPa or less, the film or laminate will not shrink during the molding process, making it difficult for the bag to wrinkle.
- These heat shrinkage stresses can be controlled by the degree of stretching, the stretching temperature, and the like in the tenter stretching method, the inflation stretching method, and the like. That is, if the degree of stretching is low, the heat shrinkage stress becomes small, and if the degree of stretching is large, the heat shrinkage stress becomes large. Even in the case of the same degree of stretching, the heat shrinkage stress decreases as the stretching temperature increases, and the heat shrinkage stress increases as the stretching temperature decreases. Controlling these stretching temperature and stretching degree is an important point when forming a film. As a method for controlling the heat shrinkage stress, it is also a good method to heat set after obtaining a film by a tenter stretching method, an inflation stretching method or the like. These heat sets may be free of constant length, and the set temperature may be selected as appropriate.
- the thermal shrinkage rate of the biaxially stretched polystyrene film used in the present invention is not limited, but is preferably 0 to 10%. % Is more preferred. If the heat shrinkage is 10% or less, no wrinkles will occur when the bag is made.
- T die isotropic force examples include, but are not limited to, an inflation stretching method and a tenter stretching method.
- the stretching temperature when the stretching temperature is low, the melt viscosity of the resin increases, and even when the stretching ratio is low, the orientation of the resin molecules increases.
- the stretching temperature when the stretching temperature is high, the melt viscosity of the resin is low, and even when the stretching ratio is high, the molecular orientation of the resin is low. Therefore, the stretching temperature is not limited. In the present invention, it is important to control the orientation of the resin molecules, which is directly related to the heat shrinkage stress of the biaxially stretched polystyrene film.
- the stretching ratio is determined in the flow (MD) direction and the width (TD) direction, respectively. I prefer 3 to 12 times. The range of 5 to 10 times is more preferable from the viewpoints of the good tearability, the expression of waist strength, and the uniformity of stretching, which are the characteristics of the bag by imparting stretch orientation. A stretch ratio of 3 times or more is preferable because the stretch orientation degree is moderate, the impact resistance of the bag is increased, and the tearability of the resulting bag is improved. When the draw ratio is 12 times or less, wrinkles and the like are not generated when the film has a low heat shrinkage rate.
- the stretching ratio is preferably 1.5 to 8 times in each of the MD direction or the TD direction.
- the range of 2 to 6 times is particularly preferable from the viewpoints of tearability and stretch uniformity, which are characteristics of the bag by imparting stretch orientation.
- a stretch ratio of 1.5 times or more is preferable because the stretch orientation degree is moderate and the impact resistance of the bag is increased.
- the tearability of the obtained bag improves, it is preferable.
- the stretching ratio in the MD direction is preferably 1.3 to 4.0 times, and the TD direction is preferably 4 to 8 times.
- stretching in the MD direction is first performed, and then stretching in the TD direction is preferably performed under different conditions in order to balance molecular orientation. .
- the tearability is almost the same in any direction, so the bag can be easily opened from any direction, and the propagation of the tear is in the same direction. Easy to go.
- the opening direction is the vertical or horizontal direction of the bag, and it can be easily opened by hand from either direction, and the propagation of tearing easily proceeds in the same direction. .
- These characteristics are very different from cellophane and other plastic films and are a particularly effective part of the present invention.
- the torn part propagates in a direction different from the direction in which it was opened, the contents of the bag wrapped with powdered pharmaceuticals or foods may spill out when opened.
- the amount used is prescribed for each individual, and the content is often strictly regulated, so this straightness in the tearing direction is particularly effective.
- the bag can be produced that can be easily and linearly torn only from one direction of the bag. That is, it can be easily opened only from one direction of the bag, A bag that cannot be easily opened from the straight direction can be produced.
- These bags can change the tearability of the resulting bag by means such as extremely changing the draw ratio in the MD and TD directions when making a biaxially stretched polystyrene film. For example, if the tearability of a film in one direction is good, a bag using this film can be easily torn in only one direction, and a product can be made that is hardly torn in the other direction. For example, it is highly effective for the reasons described above that stick packaging or the like for bags containing medicines and foods can be easily cut only in the lateral direction.
- the thickness of the biaxially stretched polystyrene film is preferably 5 to 60 ⁇ m! /. From the balance of bag waist, processability, and tearability, it is preferably 10 to 50 111, more preferably 15 to 40 m. When the film is 5 m or longer, the bag is hard to tear and the waist is strong, so that the workability and workability are good. If it is less than 60 / zm, tearability will improve when it is made into a bag, and it can be easily torn by hand. Also, the price of the final bag can be reduced.
- the type of polyethylene resin used as the heat seal layer is not limited.
- the polyethylene resin linear low density polyethylene (LLDPE), low density polyethylene (LDPE), high density polyethylene (HDPE), etc. can be used, and a mixture thereof may be used.
- LLDPE linear low density polyethylene
- LDPE low density polyethylene
- HDPE high density polyethylene
- These resins also have heat-sealable ethylene-vinyl acetate copolymers, ethylene-acrylic ester copolymers, for the purpose of increasing adhesion and controlling the softness point of the resin and the heat seal temperature.
- An ionic cross-linked product of an acid copolymer (ionomer), a copolymer of ethylene and ⁇ -olefin produced using a single-site catalyst (meta-orthocene catalyst) is preferred alone or with other olefin fin resins. May be a mixed composition! /.
- the thickness of the polyethylene film is a force capable of appropriately selecting the thickness as long as it functions as a heat seal layer, preferably 5 ⁇ m to 50 ⁇ m, more preferably 10 ⁇ m to 40 ⁇ m. More preferably 15 ⁇ m to 30 ⁇ m.
- the thickness is 5 ⁇ m or more, sufficient adhesive strength can be obtained, and adhesion failure and pinholes occur when a bag is formed.
- it is 5 O / z m or less, the cost is lowered and the easy tearability of the bag is improved.
- the melting point of the polyethylene resin used as the heat seal layer is not limited, but it is preferably 5 ° C or more lower than the Bicatz softening temperature of the amorphous polystyrene copolymer resin. The lower one is more preferable. Heat seal when lower than 5 ° C A wide temperature range can be obtained, and a good bag can be obtained.
- the tensile elongation of the polyethylene resin film to be the heat seal layer is preferably low.
- the tensile elongation of the polyethylene resin film is low, the resulting bag is easily torn.
- the elongation of the polyethylene resin film increases, and when the bag is torn, only the film made of polyethylene resin expands, peeling occurs between the layers, and the tearability of the biaxially stretched polystyrene film. It hinders goodness and makes it difficult to open the bag.
- the elongation of the polyethylene resin film is preferably 900% or less, more preferably 700% or less.
- the higher the elastic modulus of the polyethylene resin film the easier it is to tear the obtained bag.
- the flexural modulus of polyethylene resin is preferably 50 MPa or more, more preferably lOOMPa or more. These tensile properties are measured with ⁇ O IS K7113, and the flexural modulus is measured with ⁇ O IS K7203.
- an antistatic agent is kneaded or coated in a polyethylene resin or polystyrene resin is a more preferable embodiment.
- the antistatic agent is preferably in the polyethylene-side resin layer, that is, the inner layer, with which the contents are in direct contact.
- the contents are pharmaceuticals, the contents will not remain in the case of using the method by kneading into coconut oil more favorably than the method of applying to the surface.
- the intake amount should be limited, it is more preferable to apply antistatic processing to the inner layer.
- a method of laminating a heat-sealable polyethylene film and a biaxially stretched polystyrene film to form a laminated film is not limited.
- a biaxially stretched polystyrene film and a polyethylene film that have been pre-prepared can be laminated together and laminated.
- a biaxially stretched polystyrene film may be extruded and coated with a polyethylene film. Yes. From the viewpoint of ease of processing, the pol-lamination is simpler and can further enhance the adhesion of the laminated film. It is preferable to use a film with improved adhesion of biaxially stretched polystyrene film for bol lamination.
- an anchor coating agent as an adhesive before intensive lamination.
- the anchor coating agent is not limited as long as it enhances the adhesiveness.
- Anchor coating agents such as a polymer, a styrene polymer, and a polyphenylene ether copolymer can be used.
- the application amount of the anchor coating agent used as these adhesives is preferably the minimum required amount unless the adhesiveness is impaired. Generally, lOmgZm 2 or less is preferable in terms of dry weight, and more preferably 5 mgZm 2 or less. .
- the surface tension is preferably 35 mN / m or more, more preferably 40 mN / m or more. Although there is no upper limit, 80mNZm or less is preferred. These surface tension values are achieved by the physical and Z or chemical methods described above.
- the adhesiveness is good, the above-described good tearability of the polystyrene film is viable, and it can be laminated with the polyethylene film to achieve easy opening of the resulting bag.
- the bag to be used finally prints on the surface, but in order to improve this printability, it is preferable to perform physical processing such as electrical discharge machining or coating.
- a method of coextruding the respective resins to make a laminated film is also preferable.
- the production method of the laminated film in the case of co-extrusion is the same as the film forming conditions for producing the biaxially stretched polystyrene of the present invention.
- an adhesive resin as an adhesive between the polystyrene film layer and the polyethylene film layer for the purpose of enhancing the adhesion between the polystyrene film layer and the polyethylene film layer.
- adhesive resins include acrylate-modified polyethylene resins (for example, ethylene methyl acrylate, ethylene ethyl acetate). Lilate, ethylene butyl acrylate, etc.), ionomer resin, acid-modified polyethylene resin (for example, acid-modified resin modified with maleic anhydride or carboxylic acid), ethylene 'vinyl acetate resin, styrene ethylene block copolymer Coalescence, hydrogenated styrene elastomer, polystyrene poly (ethylene z-butylene) block polystyrene resin, styrene
- acrylate-modified polyethylene resins for example, ethylene methyl acrylate, ethylene ethyl acetate. Lilate, ethylene butyl acrylate, etc.
- ionomer resin for example, acid-modified polyethylene resin modified with maleic anhydride or carboxylic acid
- ethylene 'vinyl acetate resin for
- polystyrene poly (ethylene z-propylene) block polymer resin polystyrene-poly (ethylene z-propylene) block-polystyrene resin S, polystyrene poly (ethylene-ethylene-z-propylene) block polystyrene resin Etc.
- resin for improving the adhesiveness an acrylate-modified polyethylene resin or an acid-modified polyethylene resin is preferable.
- the amount of the adhesive resin used as these adhesives is more preferably 3 ⁇ / m 2 or less, preferably 5 / m 2 or less, and the minimum required amount, as long as the adhesion is not impaired.
- the heat shrinkage stress of the laminated film of the biaxially oriented polystyrene film and the polyethylene film of the present invention is preferably 50 to 3000 KPa in an arbitrary direction and more preferably 100 to 2000 KPa.
- the laminated film is a film in which an antistatic agent or an antifogging agent is attached to one side or both sides for the purpose of imparting functions such as antistatic property, antifogging property, and oil resistance of the product or molded product. be able to. Also, in order to increase the adhesion between the biaxially stretched polystyrene film and the polyethylene film, it is not possible to carry out electrical discharge machining such as corona treatment or plasma treatment to increase the surface tension on the side where the biaxially stretched polystyrene film is laminated. preferable.
- the bag of the present invention is arranged so that the above-mentioned biaxially stretched polystyrene film is on the outside and the polyethylene film is on the inside.
- the bonding method for heat-sealing using a laminated film to obtain a bag-like product is not limited, and various bonding methods can be used. For example, two sheets between hot rolls are used. There are a method of heat-sealing through the film and a method of pressing on two films with a hot plate.
- the bag of the present invention has a heat-seal on at least two pieces of packaging bags, particularly at the outer edge of the bag. It is preferably a packaging bag that is easy to open and heat-sealed so that the lead wire is located.
- a packaging bag that is easy to open and heat-sealed so that the lead wire is located.
- a triangular bag a general quadrilateral bag that only needs to be heat-sealed on two folded sides can be made with a three-sided seal or a four-sided seal.
- Packaging is also acceptable.
- the shape of these bags may be selected by the supplier of the bags for packing pharmaceuticals and foods according to the properties of the items contained, or considering the convenience of the users who actually consume them.
- the user with the same heat sealing part and width as above should be selected.
- the transparency (HAZE) of the laminated film is preferably 70% or less, and more preferably 50% or less.
- HAZE is 70% or less, it is preferable that information on the type, color, shape, etc. of medicines and foods to be put in the bag after bag making processing is visible from the outside. Transparency is an important factor, especially in the case of pharmaceuticals, in order to confirm the identification number and color of the pharmaceutical. In this sense, the color of the film is preferably close to colorless.
- an aluminum foil may be disposed between the biaxially stretched polystyrene film and the polyethylene film.
- the use of a resin film other than a laminated film of a biaxially stretched polystyrene film and a polyethylene film is used as long as the tearability and straightness of tearing are not impaired. it can.
- the bag can be opened by combining the laminated film of the present invention. Sealability can be further improved.
- the biaxially stretched polystyrene film is generally used for the resin film generally used, which is easy to tear by hand and very easy to tear. And it is preferable that only the polyethylene film bonded to it is also good!
- the aluminum foil used in the present invention is preferably 1N30 in the class indicated by aluminum and aluminum alloy foil according to JIS4160.
- Aluminum foil is roughly divided into hard foil and soft foil, but when soft foil is used, it affects the adhesion of the laminated film, so it remains on the surface. It is necessary to consider rolling oil.
- the thickness of the aluminum foil is 3 to 70 ⁇ m, more preferably 5 to 50 ⁇ m, considering gas barrier properties and tearability. Thicknesses of 3 ⁇ m or more have sufficient gas barrier properties and there is no risk of pinholes. In addition, the following can be opened easily with a highly tearable hand.
- an anchor coating agent such as urethane, imine, or butadiene may be applied when laminated with these films. preferable.
- the adhesive lamination method of the aluminum foil and the biaxially stretched polystyrene film can be performed by a wet lamination method, a dry lamination method, a solventless lamination method, an extrusion lamination method, or the like.
- a wet lamination method a dry lamination method
- a solventless lamination method a solventless lamination method
- an extrusion lamination method or the like.
- Vsp Vicat softening temperature
- the appearance inspection of the bag-made bag was carried out from the following viewpoints.
- ⁇ A good-looking bag that is free from wrinkles and defects due to heat shrinkage in both the heat-sealed part and the whole.
- X A bag in which wrinkles and defects occurred due to heat shrinkage in the heat-sealed part or the whole.
- Oxygen permeability Measured under conditions of 23 ° C. and 65% RH according to ASTM D3985 using a product name: OX-TRAN-200H100 manufactured by MOCON.
- Water vapor permeability Made by MOCON, trade name: PERMATRAN, W-200, measured according to AST M-F1249 at 38 ° C and 90% RH.
- the anchor coating agent was applied to the surface-treated side so that the dry coating amount was 4 mg / cm 2 and dried, and then various polyethylenes were coated at a resin temperature of 320 ° C, thickness Extruded onto a biaxially stretched polystyrene film so as to have a thickness of 20 ⁇ m, a heat seal layer having unstretched polyethylene film strength was formed to obtain a laminated film.
- the anchor coating agent was applied to the surface-treated side so that the dry coating amount was 4 mg / cm 2 and dried. Thereafter, a polyethylene film serving as a heat seal layer was superposed on the biaxially stretched polystyrene film and laminated with heat (temperature 130 ° C., linear pressure 2.5 kg / cm) to obtain a laminated film.
- Examples 1 to 8 and Comparative Examples 1 to 5 are Examples and Comparative Examples of bags that do not contain the aluminum foil in the present invention.
- Table 1 shows the stretching conditions and evaluation results.
- a styrene-methacrylic acid copolymer resin manufactured by PS Japan Co., Ltd., G9001 (trade name) (crystallinity: 0%) was used to form a film by the tenter method.
- the film forming conditions are shown in Table 1.
- the obtained film had a Vicat soft temperature of 126 ° C., and the film thickness averaged 21 ⁇ m. Using this film, one side was discharged and the surface wettability index was set to a contact angle of 33 degrees.
- the imine anchor coating agent (EL-420 (Toyo Morton Co., Ltd.
- This bag had a good appearance and could be easily torn by hand in any direction almost perpendicular to the heat seal line from any position on the heat seal line.
- this laminated film was filled with powder using a bag making machine and SHARTY machine (registered trademark) manufactured by Yuyama Manufacturing Co., Ltd. to make a three-side sealed bag.
- This bag also has a good appearance and can be easily torn by hand in any direction almost perpendicular to the side from any position on the heat-sealed line and from the film side. It was.
- the experimental conditions and evaluation results are summarized in Table 1.
- non-crystalline polystyrene copolymer resin styrene-methacrylic acid copolymer resin manufactured by PS Japan, G9001 (trade name) (crystallinity: 0%) was used. Rate blend of styrene copolymer elastomer, SC004 (trade name), PS Japan high impact polystyrene (HIPS) and HT478 (trade name) in order at a wt ratio of 75:10:15 and extrude this.
- the film was formed by the tenter method. The film forming conditions are shown in Table 1.
- the obtained film had a Vicat softening temperature of 118 ° C., and the average film thickness was 22 ⁇ m.
- the experimental conditions and evaluation results are summarized in Table 1.
- Example 3 As a non-crystalline polystyrene copolymer resin, styrene-methacrylic acid copolymer resin manufactured by Dainippon Ink and Chemicals, Lurex (registered trademark) A-14 (crystallinity: 0%) is used as a tenter method. Was formed into a film. The film forming conditions are shown in Table 1. The obtained film had a Vicat softening temperature of 133 ° C., and the average film thickness was 25 ⁇ m. This was subjected to the same strength as in Example 1 to form a laminated film, and further, a three-side seal bag and a four-side seal bag were obtained by the same method.
- Lurex registered trademark
- A-14 crystalstallinity: 0%
- amorphous polystyrene polymer resin styrene monomethacrylic acid copolymer resin manufactured by Dainippon Ink and Chemicals, Lurex (registered trademark) A-14 (crystallinity: 0%) is used.
- SX100 trade name
- PS Japan HIPS Japanese HIPS
- 11-chome 478 trademark
- the resulting film had a Vicat softening temperature of 128 ° C., and the average film thickness was 22 m.
- the experimental conditions and evaluation results are summarized in Table 1.
- amorphous polystyrene copolymer resin styrene-methacrylic acid copolymer resin manufactured by Dainippon Ink and Chemicals, Rurex (registered trademark) A-14 (crystallinity: 0%) was used.
- the film forming conditions are shown in Table 1.
- the resulting film has a Vicat soft temperature of 131 ° C and the obtained film thickness.
- the average was 22 m. This was formed into a laminated film by a boler lamination cage in the same manner as in Example 1, and further a three-side sealed bag and a four-side sealed bag were obtained in the same manner. The appearance of these bags was good, and the side force of the film that was not heat-sealed from any position of the heat-sealed line could be easily torn by hand in the direction almost perpendicular to the side surface.
- the experimental conditions and evaluation results are summarized in Table 1.
- amorphous polystyrene polymer resin O-methylstyrene Z styrene copolymer resin (crystallinity: 0%) with a copolymerization ratio of a-methylstyrene of 35 wt% was used, and the average rubber particle size was 0.8 / zm.
- Example 4 With the same resin composition as in Example 4, this was extruded and formed into a film by an inflation method (stretching temperature: 92 ° C.). The resulting film had a Vicat soft temperature of 128 ° C., and the film thickness averaged 23 m. This was subjected to the same strength as in Example 1 to form a laminated film, and further, a three-side sealed bag and a four-side sealed bag were obtained by the same method. These bags had a good appearance and could be easily torn by hand in the direction almost perpendicular to the side, from any position on the heat-sealed line and from the film side that was not heat-sealed. The experimental conditions and evaluation results are summarized in Table 1.
- Example 4 The same polystyrene film as in Example 4 was used, one side was electrodischarge processed, the surface wettability index was set to a contact angle of 33 degrees, and the butadiene anchor core manufactured by Dainichi Seiki Co., Ltd. And Seikadine 4300 (registered trademark) with a dry coating amount of about 4 mg / m 2 After being coated and dried, Ube Industries, Ltd., Umerit (registered trademark) 015AN is extruded onto the above polystyrene film to a thickness of 20 ⁇ m at a die temperature of 300 ° C as a polyethylene resin, and laminated film It was.
- Umerit registered trademark
- the bag was processed in the same manner as in Example 4 to obtain a three-side sealed bag and a four-side sealed bag, respectively. These bags had good appearance and could be easily torn by hand in the direction almost perpendicular to the side, from any position on the heat-sealed line and from the non-heat-sealed film side.
- the experimental conditions and evaluation results are summarized in Table 1.
- a polypropylene film (manufactured by Tokyo Cellophane, Tosero OP (registered trademark), thickness 20 m) was used as the base film, and this was laminated into a laminated film by the same method as in Example 1.
- a three-side sealed bag and a four-side sealed bag were produced in the same manner.
- the appearance of the bag-made product was impaired due to wrinkles on the heat seal surface of the bag.
- the tear strength was good.
- tearing by hand was hardly possible from the film side, and it was finally possible to tear when the notch was punched.
- even when opening from the heat seal part side when opening, it does not cut straight, the tearing surface bends, the contents may spill, the tearing surface extends, and the contents almost spill Met.
- OPS film registered trademark 01 ⁇ 25 (crystallinity: 0%), thickness 25 111 manufactured by Asahi Kasei Life & Living Co., Ltd. was used. It was made into a laminated film by Nationalyon Kaye. In addition, three-side sealed bags and four-side seal bags were produced in the same manner. However, although a bag-making product was made, some shrinkage was observed and the quality was poor. The film was barely torn, but the tearability was bad.
- amorphous polystyrene copolymer resin styrene-methacrylic acid copolymer resin (crystallinity: 0%) and the film forming conditions are shown in Table 1.
- the resulting film had a Vicat soft temperature of 107 ° C. and an average thickness of 22 m.
- Table 1 The experimental conditions and evaluation results are summarized in Table 1.
- amorphous polystyrene copolymer resin G9001 (trade name) (degree of crystallization: 0%) manufactured by PS Japan was used to form a film by the tenter method.
- the film forming conditions are shown in Table 2.
- the resulting film had a Vicat softening temperature of 126 ° C, and the resulting film thickness averaged 21 ⁇ m.
- a polystyrene resin film was prepared with a contact angle of 33 degrees as the surface wetting index. Next, release of the obtained polystyrene resin film.
- an imine anchor coating agent (EL-420 (trade name) manufactured by Toyo Morton Co., Ltd.) is applied to a dry coating amount of about 4 mgZm 2 and dried, and then a polystyrene-based resin film (PS -I got 9).
- the same anchor coating agent was applied to 9 m aluminum foil (SA30 (trade name), manufactured by Sumitomo Light Metal Co., Ltd.) to a dry coating amount of about 40 mg / m 2 and dried (AL-1). .
- SA30 trade name
- AL-1 9 m aluminum foil
- L2340 (trade name) (PE-1) manufactured by Asahi Kasei Chemicals Co., Ltd.
- polyethylene resin is set to a temperature immediately below the die of 320 ° C and a thickness of 15 m. Further, while the polyethylene resin was subjected to ozone treatment, it was extruded into a film and PS-1 and AL-1 were sand-laminated. Next, on the aluminum foil of the obtained laminated film (PS-1ZPE-1ZAL-1), the same polyethylene resin as above was extruded to a thickness of 30 m under the same conditions, and the heat seal layer (PE-1 ' ) was formed.
- the resulting laminated film (PS-9ZPE-1ZAL-1ZPE-1 ') was put together on the polyethylene side and heat-sealed at 150 ° C for 0.2 seconds to make a four-side sealed bag.
- the laminated film on one side of the bag was taken out, and its gas nooricity was evaluated.
- the bag looked good and could easily be torn by hand in any direction almost perpendicular to the heat seal line from any position on the heat seal line.
- this laminated film was put on a bag making machine made by Topack Co., and powder was put in to make a three-side sealed bag.
- PS Japan G9001 (trade name) (crystallinity: 0%) is used as the amorphous polystyrene copolymer resin, and this is PS Japan Butyl Atallate Z Styrene Copolymer Elastomer, SC004 (Product name) and PS Japan HIPS and HT478 (product name) were blended in order at a wt ratio of 75:10:15, extruded, and filmed by the tenter method.
- the obtained film had a Vicat softening temperature of 118 ° C., and the average film thickness was 22 ⁇ m.
- Example 9 Using this film, it was discharged on one side and the surface wettability index was set to a contact angle of 33 degrees, and the same post-treatment as in Example 9 was performed to obtain a polystyrene-based resin film (PS-10). Thereafter, lamination was performed in the same manner as in Example 1 to obtain a laminated film (PS— 10ZPE—1ZAL—1ZPE—1 ′), bags were prepared and evaluated in the same manner as in Example 9. These bags had good appearance, and the side force that was not heat-sealed from any position of the heat-sealed line could be easily torn by hand in the direction almost perpendicular to the side surface. Table 2 summarizes the experimental conditions and evaluation results.
- a film was formed by the tenter method using Lurex (registered trademark) A-14 (crystallinity: 0%) manufactured by Dainippon Ink & Chemicals, Inc. as an amorphous polystyrene copolymer resin.
- the film forming conditions are shown in Table 2.
- the resulting film had a Vicat softening temperature of 133 ° C and the resulting film thickness averaged 25 m.
- the surface wettability index was set to a contact angle of 33 degrees, and the same post-treatment as in Example 9 was performed to obtain a polystyrene-based resin film (PS-11).
- Example 9 lamination was performed in the same manner as in Example 9 to obtain a laminated film (PS-11ZPE-1ZAL-1ZPE-1 ′), and a bag was prepared and evaluated in the same manner as in Example-1.
- These bags also have a good appearance and can be easily torn by hand in any direction almost perpendicular to the side, from any position on the heat-sealing line and from the side that is heat-sealed. It was. Table 2 summarizes the experimental conditions and evaluation results.
- amorphous polystyrene-based copolymer resin Lurex (registered trademark) A-14 (crystallinity: 0%) manufactured by Dainippon Ink & Chemicals, Inc. was used, and methyl methacrylate Z manufactured by PS Japan Co., Ltd. was used.
- the obtained film had a Vicat soft temperature of 128 ° C., and the average film thickness was 22 m.
- Example 13 Using this film, discharge processing was performed on one side, the contact angle was set to 33 ° as the surface wetting index, and the same post-treatment as in Example 9 was performed to obtain a polystyrene-based resin film (PS-12). Thereafter, lamination was performed in the same manner as in Example 1 to obtain a laminated film (PS-12ZPE-1ZAL-1ZPE-1 ′), and a bag was prepared and evaluated in the same manner as in Example 9. These bags had a good appearance and could be easily torn by hand in any direction almost perpendicular to the side from any position of the heat-sealed line and from the non-heat-sealed side. The experimental conditions and evaluation results are summarized in Table 2. [Example 13]
- amorphous polystyrene-based copolymer resin Lurex (registered trademark) A-14 (crystallinity: 0%) manufactured by Dainippon Ink & Chemicals, Inc. was used, and methyl methacrylate Z manufactured by PS Japan Co., Ltd. was used.
- the film was formed by the method.
- the obtained film had a Vicat soft temperature of 131 ° C., and the obtained film thickness averaged 22 m.
- Example 9 Using this film, electric discharge machining was performed on one side, the contact angle was set to 33 degrees as the surface wetting index, and the same post-treatment as in Example 9 was performed to obtain a polystyrene-based resin film (PS-13). Thereafter, lamination was performed in the same manner as in Example 9 to obtain a laminated film (PS-13 / PE-1ZAL-1 / PE-1 '), and a bag was prepared and evaluated in the same manner as in Example-9. These bags had good appearance and could be easily torn by hand in any direction almost perpendicular to the side from any position on the heat-sealed line and from the non-heat-sealed side. Table 2 summarizes the experimental conditions and evaluation results.
- amorphous polystyrene copolymer resin ⁇ -methylstyrene Z styrene copolymer resin (crystallinity: 0%) with an a-methylstyrene copolymerization ratio of 35 wt% was used, and the average rubber particle size was 0.8.
- Example 9 Using this film, discharge processing was performed on one side, the contact angle was set to 33 ° as the surface wetting index, and the same post-treatment as in Example 9 was performed to obtain a polystyrene-based resin film (PS-14). Thereafter, lamination was performed in the same manner as in Example 9 to obtain a laminated film (PS-14ZPE-1ZAL-1ZPE-1 ′), and a bag was prepared and evaluated in the same manner as in Example 9. These bags had good appearance and could be easily torn by hand in any direction almost perpendicular to the side from any position on the heat-sealed line and from the non-heat-sealed side. Table 2 summarizes the experimental conditions and evaluation results.
- Example 12 With the same resin composition as in Example 12, this was extruded, and only the stretch ratio was changed to form a film by the tenter method.
- the draw ratio was 2 times in the MD direction and 6 times in the TD direction.
- the obtained film had a Vicat softening temperature of 128 ° C. and an average film thickness of 22 ⁇ m.
- electric discharge machining was performed on one side, the contact angle was set to 33 ° as the surface wetting index, and the same post-treatment as in Example 9 was performed to obtain a polystyrene-based resin film (PS-16).
- PS-16 polystyrene-based resin film
- This PS-8 film did not lose its power when the MD direction was used by hand, and the TD direction became a film with better cutting properties.
- Example 9 lamination was performed in the same manner as in Example 9 to obtain a laminated film (PS-16ZPE-1ZAL-1ZPE-1 ′), and a bag was prepared and evaluated in the same manner as in Example 9.
- These bags also have a good appearance and can be easily torn by hand in any direction almost perpendicular to the side, from any position on the heat-sealing line and from the side that is heat-sealed. It was.
- Table 2 summarizes the experimental conditions and evaluation results. In this experiment, the tearability of the bag was cut well by hand in the TD direction of the bag and its straightness was good, but it was very difficult to cut the film in the MD direction. The results in Table 2 were evaluated in consideration of these different cut directions.
- Example 12 Using the same film (PS-18) as in Example 12, changing the thickness and thickness of the outer layer polyethylene (Ube Industries, Ltd., Umerit (registered trademark) 015AN) to be the heat seal layer, the extrusion temperature 300 ° C The thickness was 55 / zm (PE-18). Lamination was performed in the same manner as in Example 9 to obtain a laminated film (PS-18ZPE-1ZAL-1ZPE-18), and bags were prepared and evaluated in the same manner as in Example 9. These bags had a good appearance and could be easily torn by hand in any direction almost perpendicular to the side from any position on the heat-sealed line and from the non-heat-sealed side. Table 2 summarizes the experimental conditions and evaluation results.
- PS-18ZPE-1ZAL-1ZPE-18 laminated film
- the OPS film (registered trademark) 01 ⁇ 25 (crystallinity: 0%) manufactured by Asahi Kasei Life & Living Co., Ltd., with a thickness of 25 111 was used. It was made into a laminated film. Using this film, it was discharged on one side and subjected to the same post-treatment as in Example 9 with a contact angle of 33 degrees as the wetting index of the surface to obtain a polystyrene-based resin film (GPS-6). Thereafter, lamination was performed in the same manner as in Example 9 to obtain a laminated film (GPS-6ZPE-1 / AL-1 / PE-1 ′), and a bag was prepared and evaluated in the same manner as in Example 9.
- Example 9 As a polystyrene film, Cellomer (registered trademark) HA30CPS film GK (crystallinity: 0%) manufactured by Oishi Sangyo Co., Ltd., with a thickness of 30 m was used. The contact angle was set to 33 degrees, and the same post-treatment as in Example 9 was performed to obtain a polystyrene-based resin film (CPS-7). Thereafter, lamination was performed in the same manner as in Example 9 to obtain a laminated film (CPS-7ZPE-1ZAL-1ZPE-1 ′), and a bag was prepared and evaluated in the same manner as in Example 9. As for the borage lamination, the film shrunk, and the one with good quality could not be obtained.
- CPS-7 polystyrene-based resin film
- polystyrene resin styrene-methacrylic acid copolymer resin (crystallinity: 0%) and the film forming conditions are shown in Table 3.
- the obtained film had a Vicat soft temperature of 107 ° C. and the obtained film thickness averaged 22 m. Using this film, it was discharged on one side and the surface wettability index was set to a contact angle of 33 degrees, and the same post-treatment as in Example 9 was performed to obtain a polystyrene resin film (PS-H4).
- Example 9 Thereafter, lamination was performed in the same manner as in Example 9 to obtain a laminated film (PS—H4ZPE—1ZAL—1 / PE-1 ′), and a bag was prepared and evaluated in the same manner as in Example 9. However, although the bag-making product was made, some shrinkage was observed and it became poor quality. Also, the force that the film barely tears off.
- Table 3 The experimental conditions and evaluation results are summarized in Table 3.
- the resin film used on the surface is a polyester film made by Toyobo Co., Ltd., a TF110 (trade name) 16 m film (crystallinity: 0%), and this film is discharged on one side and wetted on the surface.
- a contact angle of 33 degrees was used as an index, and the same post-treatment as in Example 9 was performed to obtain a polyester-based resin film (PET-9).
- PET-9 polyester-based resin film
- pasting is performed in the same manner as in Example 9, A laminated film was obtained (PET-9 / PE-1ZAL-1 / PE-1 '), and a bag was prepared and evaluated in the same manner as in Example 9. The quality of the bag-making products was good, but the tearability was good.
- Vicat softening temperature 3 ⁇ 4 ;, film thickness; ⁇ ⁇ , H A Z E;%
- the processed bag products are applied to a heat seal machine.
- Vicat softening temperature ⁇ ;, film thickness; m, each forming strength; 3 ⁇ 4: oxygen paria uniformity: c c Znf ⁇ d a y ⁇ at m, water vapor barrier property: c c no m-d a y
- bag-processed products are when heat-sealed.
- the present invention can be suitably used in the field of bags that can be easily opened.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
- Bag Frames (AREA)
- Packages (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002585971A CA2585971A1 (en) | 2004-11-01 | 2005-10-27 | Easy-to-open bag |
CN2005800373896A CN101052569B (zh) | 2004-11-01 | 2005-10-27 | 易开封袋 |
AT05799359T ATE545600T1 (de) | 2004-11-01 | 2005-10-27 | Leicht zu öffnender beutel |
JP2006543233A JP4999067B2 (ja) | 2004-11-01 | 2005-10-27 | 開封容易な袋 |
EP05799359A EP1808377B1 (en) | 2004-11-01 | 2005-10-27 | Easy-to-open bag |
US11/666,614 US20080113135A1 (en) | 2004-11-01 | 2005-10-27 | Easy Opening Bag |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-318168 | 2004-11-01 | ||
JP2004318168 | 2004-11-01 | ||
JP2004-323283 | 2004-11-08 | ||
JP2004323283 | 2004-11-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006049070A1 true WO2006049070A1 (ja) | 2006-05-11 |
Family
ID=36319082
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/019752 WO2006049070A1 (ja) | 2004-11-01 | 2005-10-27 | 開封容易な袋 |
Country Status (9)
Country | Link |
---|---|
US (1) | US20080113135A1 (ja) |
EP (1) | EP1808377B1 (ja) |
JP (1) | JP4999067B2 (ja) |
KR (1) | KR20070057966A (ja) |
CN (1) | CN101052569B (ja) |
AT (1) | ATE545600T1 (ja) |
CA (1) | CA2585971A1 (ja) |
TW (1) | TWI270462B (ja) |
WO (1) | WO2006049070A1 (ja) |
Cited By (6)
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JP2007269913A (ja) * | 2006-03-30 | 2007-10-18 | Asahi Kasei Chemicals Corp | 易引き裂き性フィルム |
JP2007284601A (ja) * | 2006-04-18 | 2007-11-01 | Asahi Kasei Chemicals Corp | 易カット性フィルム |
WO2008154777A1 (fr) * | 2007-06-19 | 2008-12-24 | Guangdong Huaye Packing Material Co., Ltd. | Procédé de préparation d'un film de torsion de polystyrène |
JP2009102048A (ja) * | 2007-10-24 | 2009-05-14 | Ishida Co Ltd | 包装袋用積層フィルム及び包装袋 |
JP2010094948A (ja) * | 2008-10-20 | 2010-04-30 | Asahi Kasei Chemicals Corp | 積層フィルム及び袋 |
JP2017077709A (ja) * | 2015-10-22 | 2017-04-27 | 東ソー株式会社 | 積層体及びこれよりなる包装体 |
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JP6854819B2 (ja) * | 2016-07-12 | 2021-04-07 | デンカ株式会社 | 二軸延伸シートおよびその成形品 |
CN111421923A (zh) * | 2020-04-15 | 2020-07-17 | 天长市天粤塑胶有限公司 | 一种内粘外淋多层立体编织袋 |
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- 2005-10-27 EP EP05799359A patent/EP1808377B1/en active Active
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JP2007269913A (ja) * | 2006-03-30 | 2007-10-18 | Asahi Kasei Chemicals Corp | 易引き裂き性フィルム |
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JP2017077709A (ja) * | 2015-10-22 | 2017-04-27 | 東ソー株式会社 | 積層体及びこれよりなる包装体 |
Also Published As
Publication number | Publication date |
---|---|
JP4999067B2 (ja) | 2012-08-15 |
ATE545600T1 (de) | 2012-03-15 |
EP1808377B1 (en) | 2012-02-15 |
CN101052569A (zh) | 2007-10-10 |
CA2585971A1 (en) | 2006-05-11 |
US20080113135A1 (en) | 2008-05-15 |
TWI270462B (en) | 2007-01-11 |
EP1808377A1 (en) | 2007-07-18 |
KR20070057966A (ko) | 2007-06-07 |
JPWO2006049070A1 (ja) | 2008-05-29 |
TW200621494A (en) | 2006-07-01 |
CN101052569B (zh) | 2011-01-12 |
EP1808377A4 (en) | 2011-01-26 |
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