WO2023140085A1 - 抽出袋、及び抽出袋の製造方法、並びに抽出袋用シート、及び抽出袋用シートの製造方法 - Google Patents
抽出袋、及び抽出袋の製造方法、並びに抽出袋用シート、及び抽出袋用シートの製造方法 Download PDFInfo
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- WO2023140085A1 WO2023140085A1 PCT/JP2022/048496 JP2022048496W WO2023140085A1 WO 2023140085 A1 WO2023140085 A1 WO 2023140085A1 JP 2022048496 W JP2022048496 W JP 2022048496W WO 2023140085 A1 WO2023140085 A1 WO 2023140085A1
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- Prior art keywords
- nonwoven fabric
- polylactic acid
- acid resin
- fabric layer
- spunbond nonwoven
- Prior art date
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- 238000000605 extraction Methods 0.000 title claims abstract description 110
- 238000004519 manufacturing process Methods 0.000 title claims description 28
- 238000000034 method Methods 0.000 title claims description 19
- 229920005989 resin Polymers 0.000 claims abstract description 167
- 239000011347 resin Substances 0.000 claims abstract description 167
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 156
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 149
- 239000004626 polylactic acid Substances 0.000 claims description 149
- 239000004744 fabric Substances 0.000 claims description 25
- 239000004750 melt-blown nonwoven Substances 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 16
- 230000009477 glass transition Effects 0.000 claims description 10
- 238000005304 joining Methods 0.000 claims description 8
- 238000003475 lamination Methods 0.000 abstract description 9
- 239000011087 paperboard Substances 0.000 description 35
- 244000269722 Thea sinensis Species 0.000 description 16
- 235000013616 tea Nutrition 0.000 description 15
- 239000000463 material Substances 0.000 description 13
- 239000000835 fiber Substances 0.000 description 12
- 239000000853 adhesive Substances 0.000 description 9
- 230000001070 adhesive effect Effects 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 235000016213 coffee Nutrition 0.000 description 7
- 235000013353 coffee beverage Nutrition 0.000 description 7
- 239000013078 crystal Substances 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
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- 238000001125 extrusion Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000009820 dry lamination Methods 0.000 description 3
- 235000014347 soups Nutrition 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 229920001410 Microfiber Polymers 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000002648 laminated material Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 241000512259 Ascophyllum nodosum Species 0.000 description 1
- 241000269851 Sarda sarda Species 0.000 description 1
- 235000006468 Thea sinensis Nutrition 0.000 description 1
- 235000020279 black tea Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
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- 239000012530 fluid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000005014 poly(hydroxyalkanoate) Substances 0.000 description 1
- -1 polybutylene succinate Polymers 0.000 description 1
- 229920002961 polybutylene succinate Polymers 0.000 description 1
- 239000004631 polybutylene succinate Substances 0.000 description 1
- 229920000903 polyhydroxyalkanoate Polymers 0.000 description 1
- 229920006381 polylactic acid film Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000009816 wet lamination Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
- B65D85/804—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package
- B65D85/808—Disposable containers or packages with contents which are mixed, infused or dissolved in situ, i.e. without having been previously removed from the package for immersion in the liquid to release part or all of their contents, e.g. tea bags
-
- 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
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
-
- 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
- B65D65/46—Applications of disintegrable, dissolvable or edible materials
- B65D65/466—Bio- or photodegradable packaging materials
-
- 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
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Definitions
- the present invention relates to an extraction bag formed by joining a spunbond nonwoven fabric layer containing a polylactic acid resin and an accessory member, a method for manufacturing an extraction bag, a sheet for an extraction bag, and a method for manufacturing an extraction bag sheet.
- the sheet material for coffee extraction described in Patent Document 1 is formed from a meltblown ultrafine fiber nonwoven fabric made of a biodegradable thermoplastic polymer.
- Examples of the document describe a drip-type coffee filter formed using a melt-blown nonwoven fabric made of polylactic acid ultrafine fibers.
- the extraction sheet described in Patent Document 2 is a laminate of a meltblown nonwoven fabric layer and a spunbond nonwoven fabric layer, both of which are made of a polylactic acid resin.
- Fig. 2 of the same document describes a tea bag in which a tag for picking up with fingertips is adhered to the surface of a bag formed using this extraction sheet.
- biodegradable materials In order to reduce the environmental impact of the extraction bag, it is desirable to use biodegradable materials not only for the sheet but also for all the attached parts.
- biodegradable materials such as polylactic acid, polyhydroxyalkanoate, and polybutylene succinate, but it is preferable to use the same polylactic acid resin as the material so that all the members have similar decomposition characteristics.
- some existing polylactic acid resins have different melting points, they have substantially the same melting point as general-purpose materials. If the resin used for the nonwoven fabric of the extraction bag and the resin for lamination of the accessory member are the same polylactic acid resin, the fibers forming the nonwoven fabric may be damaged when heated for the purpose of sticking.
- the present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide an extraction bag, a method for manufacturing an extraction bag, a sheet for an extraction bag, and a method for manufacturing an extraction bag, even when biodegradable polylactic acid resin is used as the resin of the nonwoven fabric used for the sheet constituting the extraction bag and the resin for lamination used for the accessory member of the extraction bag, which can properly bond the accessory member to the sheet without damaging the nonwoven fabric.
- the characteristic configuration of the extraction bag according to the present invention for solving the above problems is as follows: An extraction bag formed by joining a spunbond nonwoven fabric layer containing a polylactic acid resin and an attached member, A laminate layer containing a polylactic acid resin is provided on at least a surface of the attached member in contact with the spunbond nonwoven fabric layer, The crystallinity of the polylactic acid resin contained in the laminate layer is set to be smaller than the crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer.
- the degree of crystallinity of the polylactic acid resin contained in the laminated layer of the accessory member is set to be smaller than the degree of crystallinity of the polylactic acid resin contained in the spunbonded nonwoven fabric layer. Therefore, when heating for bonding, only the polylactic acid resin contained in the laminated layer of the accessory member is softened, and the softened laminated layer is allowed to bite into the fibers of the spunbonded nonwoven fabric layer, whereby the accessory member can be integrated with the spunbonded nonwoven fabric layer.
- the polylactic acid resin contained in the spunbond nonwoven fabric layer has not yet softened at the temperature at which the polylactic acid resin contained in the laminate layer softens, so the spunbond nonwoven fabric layer is not damaged and can maintain its function as a filter. Moreover, since the adhesive force between the spunbond nonwoven fabric layer and the attached member is properly controlled, there is no fear of damaging the spunbond nonwoven fabric layer even when the attached member is peeled off from the spunbond nonwoven fabric layer.
- the difference between the crystallinity of the polylactic acid resin contained in the laminate layer and the crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer is set to 10% or more.
- the difference between the crystallinity of the polylactic acid resin contained in the laminate layer and the crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer is set to 10% or more. Therefore, only the polylactic acid resin contained in the laminate layer with a low degree of crystallinity softens, and the softened laminate layer bites into the fibers of the spunbond nonwoven fabric layer, so that it can be firmly joined and integrated.
- the polylactic acid resin contained in the spunbond nonwoven fabric layer has a crystallinity higher than that of the polylactic acid resin contained in the laminate layer by 10% or more, the polylactic acid resin contained in the laminate layer is not yet softened at the softening temperature, and the structure of the spunbond nonwoven fabric layer is maintained, so that the spunbond nonwoven fabric layer is not damaged and can maintain its function as a filter.
- a melt blown nonwoven fabric layer containing a polylactic acid resin is provided on the spunbond nonwoven fabric layer.
- the melt-blown non-woven fabric layer containing polylactic acid resin is provided on the spun-bond non-woven fabric layer, so that the overall extraction bag reduces the environmental load, and the laminated structure of the spun-bond non-woven fabric layer and the melt-blown non-woven fabric layer allows it to have an excellent function as a filter.
- the characteristic configuration of the extraction bag manufacturing method according to the present invention for solving the above problems is as follows: A method for manufacturing an extraction bag by bonding a spunbond nonwoven fabric layer containing a polylactic acid resin and an attached member, A laminate layer containing a polylactic acid resin is provided on at least a surface of the attached member in contact with the spunbond nonwoven fabric layer, The degree of crystallinity of the polylactic acid resin contained in the laminate layer is set to be smaller than the degree of crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer, When the spunbond nonwoven fabric layer and the attached member are joined, a heating step is performed to apply a temperature 30 to 100° C. higher than the glass transition temperature Tg of the polylactic acid resin.
- the degree of crystallinity of the polylactic acid resin contained in the laminated layer of the accessory member is set to be lower than the degree of crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer. Therefore, when the spunbond nonwoven fabric layer and the accessory member are joined, a heating process is performed to apply a temperature 30 to 100°C higher than the glass transition temperature Tg of the polylactic acid resin, thereby softening only the polylactic acid resin contained in the laminate layer of the accessory member, and the softened laminate layer is spunbonded.
- the attachment member can be integrated into the spunbond nonwoven layer by wedging between the fibers of the nonwoven layer.
- the polylactic acid resin contained in the spunbond nonwoven fabric layer has not yet softened at the temperature at which the polylactic acid resin contained in the laminate layer softens, so the spunbond nonwoven fabric layer is not damaged and can maintain its function as a filter. Moreover, since the adhesive force between the spunbond nonwoven fabric layer and the attached member is properly controlled, there is no fear of damaging the spunbond nonwoven fabric layer even when the attached member is peeled off from the spunbond nonwoven fabric layer.
- the characteristic configuration of the extraction bag sheet according to the present invention for solving the above problems is as follows: A sheet for an extraction bag obtained by joining a spunbond nonwoven fabric layer containing a polylactic acid resin and an attached member, A laminate layer containing a polylactic acid resin is provided on at least a surface of the attached member in contact with the spunbond nonwoven fabric layer, The crystallinity of the polylactic acid resin contained in the laminate layer is set to be smaller than the crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer.
- the degree of crystallinity of the polylactic acid resin contained in the laminated layer of the accessory member is set to be lower than the degree of crystallinity of the polylactic acid resin contained in the spunbonded nonwoven fabric layer. Therefore, when heating for bonding, only the polylactic acid resin contained in the laminated layer of the accessory member is softened, and the softened laminated layer is allowed to bite into the fibers of the spunbonded nonwoven fabric layer, whereby the accessory member can be integrated with the spunbonded nonwoven fabric layer.
- the polylactic acid resin contained in the spunbond nonwoven fabric layer has not yet softened at the temperature at which the polylactic acid resin contained in the laminate layer softens, so the spunbond nonwoven fabric layer is not damaged and can maintain its function as a filter. Moreover, since the adhesive force between the spunbond nonwoven fabric layer and the attached member is properly controlled, there is no fear of damaging the spunbond nonwoven fabric layer even when the attached member is peeled off from the spunbond nonwoven fabric layer.
- a method for manufacturing an extraction bag sheet by bonding a spunbond nonwoven fabric layer containing a polylactic acid resin and an attached member comprising: A laminate layer containing a polylactic acid resin is provided on at least a surface of the attached member in contact with the spunbond nonwoven fabric layer, The degree of crystallinity of the polylactic acid resin contained in the laminate layer is set to be smaller than the degree of crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer, When the spunbond nonwoven fabric layer and the attached member are joined, a heating step is performed to apply a temperature 30 to 100° C. higher than the glass transition temperature Tg of the polylactic acid resin.
- the degree of crystallinity of the polylactic acid resin contained in the laminated layer of the accessory member is set to be smaller than the degree of crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer. Therefore, when the spunbond nonwoven fabric layer and the accessory member are joined, a heating process is performed to apply a temperature 30 to 100°C higher than the glass transition temperature Tg of the polylactic acid resin, thereby softening only the polylactic acid resin contained in the laminated layer of the accessory member, thereby removing the softened laminate layer.
- the attachment member can be integrated into the spunbond nonwoven layer by wedging between the fibers of the spunbond nonwoven layer.
- the polylactic acid resin contained in the spunbond nonwoven fabric layer has not yet softened at the temperature at which the polylactic acid resin contained in the laminate layer softens, so the spunbond nonwoven fabric layer is not damaged and can maintain its function as a filter. Moreover, since the adhesive force between the spunbond nonwoven fabric layer and the attached member is properly controlled, there is no fear of damaging the spunbond nonwoven fabric layer even when the attached member is peeled off from the spunbond nonwoven fabric layer.
- FIG. 1 is a cross-sectional view schematically showing a laminated structure of an extraction bag (drip bag) according to the first embodiment of the present invention.
- FIG. 2 is a cross-sectional view schematically showing the layered structure of the extraction bag (drip bag) according to the second embodiment of the present invention.
- FIG. 3 is a cross-sectional view schematically showing a layered structure of an extraction bag (tea bag) according to a third embodiment of the present invention.
- the extraction bag sheet of the present invention basically includes a laminate obtained by laminating a spunbond nonwoven fabric layer containing a polylactic acid resin and an attached member.
- the attached member has a surface (at least the surface in contact with the spunbond nonwoven fabric layer) laminated with a material containing polylactic acid resin.
- Known lamination methods include extrusion lamination, dry lamination, heat lamination, and wet lamination. As will be described later, any processing method may be used as long as the degree of crystallinity of the polylactic acid resin contained in the laminate layer is lower than that of the polylactic acid resin contained in the spunbond nonwoven fabric layer.
- the accessory parts include, for example, a locking piece for locking the extraction bag made from the extraction bag sheet of the present invention to a container such as a cup, a string attached tag attached to the extraction bag, and a thin plate member for moving the extraction bag up and down in hot water.
- a meltblown nonwoven fabric layer containing a polylactic acid resin is optionally provided on the spunbond nonwoven fabric layer.
- the extraction bag of the present invention is obtained by processing the extraction bag sheet of the present invention into a bag shape.
- bag-making methods include welding by heat or ultrasonic waves, bonding using an adhesive, and stitching using threads. Three representative embodiments of the extraction bag of the present invention will be described below.
- FIG. 1 is a cross-sectional view schematically showing the layered structure of the extraction bag according to the first embodiment of the present invention.
- This extraction bag is used as a drip bag 100 in which a spunbond nonwoven fabric layer 10 and a paperboard 20 as an attached member are joined together.
- the spunbond nonwoven fabric layer 10 is a layer that functions as a filter for extracting target components.
- the spunbond nonwoven fabric layer 10 is formed by blowing a high-speed gas stream onto a molten resin extruded from a spinning nozzle to draw and stretch the resin while cooling and solidifying to form fibers, and collecting the fibers on a collector to form a web.
- polylactic acid resin which is a biodegradable resin, is used as the resin forming the spunbond nonwoven fabric layer 10 .
- the basis weight of the spunbond nonwoven fabric layer 10 is preferably 8-20 g/m 2 , more preferably 12-20 g/m 2 .
- the paperboard 20 is a member for constituting a locking piece for locking the drip bag 100 to a container such as a cup. Therefore, the basis weight of paperboard is preferably 150 to 300 g/m 2 so as to have a certain degree of rigidity.
- the paperboard 20 is provided with a laminate layer 21 coated with a laminate material containing a thermoplastic resin as a main component at least on the surface in contact with the spunbond nonwoven fabric layer 10 .
- polylactic acid resin which is a biodegradable resin, is used as the resin for forming the laminate layer 21, like the spunbond nonwoven fabric layer 10.
- the thickness of the laminate layer 21 is preferably 20-80 ⁇ m, more preferably 40-80 ⁇ m.
- the drip bag 100 is made by bonding the paperboard 20 to the spunbond nonwoven fabric layer 10.
- the bonding of the two is performed by laminating the spunbond nonwoven fabric layer 10 and the paperboard 20, heating them, softening the polylactic acid resin contained in the laminate layer 21 on the surface of the paperboard 20, and allowing the softened polylactic acid resin to bite into the gaps between the spunbond nonwoven fabric layers 10. Therefore, in order to bond the paperboard 20 to the spunbond nonwoven fabric layer 10 well, it is important to understand the softening mechanism of the polylactic acid resin and to perform bonding (heating) under appropriate conditions.
- the polylactic acid resin is a crystalline polymer capable of phase transition between a crystalline phase and an amorphous phase.
- polylactic acid resin Like other general polymeric materials, polylactic acid resin gradually softens when it exceeds the glass transition temperature, but it tends to soften when it has a large amorphous portion, and does not easily soften when it is in a crystalline state. The higher the degree of crystallinity of the polylactic acid resin, the higher the heat resistance.
- the present inventors believe that the degree of crystallinity of the polylactic acid resin is deeply involved in joining the paperboard 20 provided with the laminate layer 21 containing polylactic acid resin to the spunbond nonwoven fabric layer 10 containing polylactic acid resin. It has been found that the paperboard 20 can be bonded to the spunbond nonwoven layer 10 without imparting a
- the degree of crystallinity of polylactic acid resin is obtained as follows. First, a test piece cut out from the spunbond nonwoven fabric layer 10 and the laminate layer 21 is set in a differential scanning calorimeter (DSC), and the temperature is raised from a temperature lower than the glass transition temperature Tg (about 50 to 60° C.) of the polylactic acid resin to a temperature exceeding the melting point Tm (about 150 to 170° C.) at a predetermined heating rate. For example, the temperature is raised from 30° C. to 240° C. at a temperature elevation rate of 10° C./min.
- DSC differential scanning calorimeter
- the crystallinity of the polylactic acid resin contained in the laminate layer 21 of the paperboard 20 is set to be lower than the crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer 10.
- the crystallinity of the polylactic acid resin contained in the laminate layer 21 is set at 1-40%
- the crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer 10 is set at 30-60%.
- the difference between the crystallinity of the polylactic acid resin contained in the laminate layer 21 and the crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer 10 is preferably set to 10% or more.
- the polylactic acid resin contained in the laminate layer 21 of the paperboard 20 is easily softened, and the polylactic acid resin contained in the spunbond nonwoven fabric layer 10 is difficult to soften. Then, if the spunbond nonwoven fabric layer 10 and the paperboard 20 are joined by applying a temperature higher than the glass transition temperature Tg of the polylactic acid resin (for example, Tg + 30 ° C.
- the polylactic acid resin contained in the laminate layer 21 of the paperboard 20 with a low degree of crystallinity softens bites into the fibers of the spunbond nonwoven fabric layer 10, so that the paperboard 20 is firmly joined to the spunbond nonwoven fabric layer 10 and integrated.
- the polylactic acid resin contained in the spunbond nonwoven fabric layer 10 has a higher degree of crystallinity than the polylactic acid resin contained in the laminate layer 21, the polylactic acid resin contained in the laminate layer 21 is not yet softened at the softening temperature, and the structure of the spunbond nonwoven fabric layer 10 is maintained.
- the crystallinity of the polylactic acid resin contained in the laminate layer 21 of the paperboard 20 is lower than the crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer 10, it is possible to bond the spunbond nonwoven fabric layer 10 using the same type of material (polylactic acid resin) to the paperboard 20 (laminate layer 21), which was conventionally thought to be difficult, while the spunbond nonwoven fabric layer 10 is not damaged, and the function as a filter can be maintained.
- the drip bag 100 is mainly made of polylactic acid resin, it greatly contributes to the reduction of the environmental load when discarding after use.
- FIG. 2 is a cross-sectional view schematically showing the layered structure of the extraction bag according to the second embodiment of the present invention.
- This extraction bag is used as a drip bag 200 for coffee, in which a spunbond nonwoven fabric layer 10 and a meltblown nonwoven fabric layer 15 are laminated, and a paperboard 20 is joined to this laminate.
- the drip bag 200 according to the second embodiment is obtained by providing the melt blown nonwoven fabric layer 15 on the spunbond nonwoven fabric layer 10 in the drip bag 100 according to the first embodiment. Therefore, only the melt-blown nonwoven fabric layer 15 will be described in the following items, and detailed description of the configuration similar to that of the drip bag 100 according to the first embodiment will be omitted.
- the melt-blown nonwoven fabric layer 15 is a layer that functions to prevent leaking of adhesive and contents during bag making.
- the melt-blown nonwoven fabric layer 15 is formed by blowing a high-temperature, high-speed gas stream onto a molten resin extruded from a spinning nozzle, stretching the molten resin into fibers and scattering them, and then collecting them on a collector and solidifying them into a sheet.
- polylactic acid resin which is a biodegradable resin, is preferably used as the resin forming the meltblown nonwoven fabric layer 15, similarly to the spunbond nonwoven fabric layer 10.
- the drip bag 200 as a whole can reduce the environmental load, and the laminated structure of the spunbond nonwoven fabric layer 10 and the melt blown nonwoven fabric layer 15 can provide an excellent function as a filter.
- the basis weight of the meltblown nonwoven fabric layer 15 is preferably 1 to 10 g/m 2 , more preferably 6 to 10 g/m 2 .
- the crystallinity of the polylactic acid resin contained in the meltblown nonwoven fabric layer 15 is not particularly limited, but is known to be lower than the crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer 10.
- the crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer 10 is set to 30 to 60% as described above, the crystallinity of the polylactic acid resin contained in the meltblown nonwoven fabric layer 15 is 20 to 40%.
- the melt-blown non-woven fabric layer 15 when the laminate of the melt-blown non-woven fabric layer 15 and the spunbond non-woven fabric layer 10 is folded so that the melt-blown non-woven fabric layer 15 is on the inside and heated, the melt-blown non-woven fabric layer 15 functions as an adhesive, making bag production easier.
- FIG. 3 is a cross-sectional view schematically showing the layered structure of the extraction bag according to the third embodiment of the present invention.
- This extraction bag is used as a tea bag 300 in which a spunbond nonwoven fabric layer 10 and a tag 30 as an attached member are joined.
- the tea bag 300 according to the third embodiment can also employ a structure in which the melt blown nonwoven fabric layer 15 is laminated on the spunbond nonwoven fabric layer 10 like the drip bag 200 according to the second embodiment.
- a tea bag 300 according to the third embodiment is provided with a tag 30 instead of the paperboard 20 in the drip bag 100 according to the first embodiment. Therefore, in the following items, only the tag 30 will be described, and detailed description of the configuration similar to that of the drip bag 100 according to the first embodiment will be omitted.
- the tag 30 is a member that is pinched with fingers when the tea bag 300 is hung by a string, is adhered to the surface of the bag when not in use, and is peeled off from the bag when in use.
- the weight of the tag is preferably 50 to 150 g/m 2 .
- the tag 30 is provided with a laminate layer 31 coated with a laminate material containing a thermoplastic resin as a main component at least on the surface in contact with the spunbond nonwoven fabric layer 10 .
- polylactic acid resin which is a biodegradable resin, is used as the resin for forming the laminate layer 31, like the spunbond nonwoven fabric layer 10.
- the thickness of the laminate layer 31 is preferably 10-80 ⁇ m, more preferably 40-80 ⁇ m.
- the degree of crystallinity of the polylactic acid resin contained in the laminate layer 31 of the tag 30 is set smaller than the degree of crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer 10 .
- the crystallinity of the polylactic acid resin contained in the laminate layer 31 is set at 1-20%, and the crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer 10 is set at 30-60%.
- the difference between the crystallinity of the polylactic acid resin contained in the laminate layer 31 and the crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer 10 is preferably set to 10% or more.
- the polylactic acid resin contained in the laminate layer 31 of the tag 30 is easily softened, and the polylactic acid resin contained in the spunbond nonwoven fabric layer 10 is difficult to soften, so that the tag 30 can be adhered to the spunbond nonwoven fabric layer 10 with an appropriate adhesive strength.
- the tag 30 will not come off when the tea bag 300 is filled with the substance to be extracted, and the tea bag 300 will not be damaged when the tag 30 is peeled off from the tea bag 300 during use.
- the extraction bag (sheet for extraction bag) of the present invention can be manufactured using, for example, heated nip rolls. Note that the heating nip roll is not shown because it is a conventionally known manufacturing device.
- the paperboard 20 having the laminate layer 21 formed by extrusion lamination is laminated on the spunbond nonwoven fabric layer 10, and this laminate is passed through a pair of heated nip rolls.
- the meltblown nonwoven fabric layer 15 is formed on the spunbond nonwoven fabric layer 10
- the paperboard 20 having the laminate layer 21 formed by extrusion lamination is laminated on the spunbond nonwoven fabric layer 10 side, and this laminate is passed through a pair of heated nip rolls.
- the tag 30 having the laminate layer 31 formed by dry lamination is laminated on the spunbond nonwoven fabric layer 10, and this laminate is passed through a pair of heated nip rolls.
- the heating temperature of the heating nip rolls is set to a temperature higher than the glass transition temperature Tg of the polylactic acid resin (for example, Tg+30° C. to 100° C.), for example, in the drip bag 100 according to the first embodiment, when the laminate passes through the pair of heating nip rolls, the polylactic acid resin contained in the laminate layer 21 on the surface of the paperboard 20 softens and bites into the gaps between the spunbond nonwoven fabric layers 10, thereby separating the spunbond nonwoven fabric layer 10 and the paperboard 20. are united and joined.
- Tg glass transition temperature
- the spunbond nonwoven fabric layer 10 since the polylactic acid resin contained in the spunbond nonwoven fabric layer 10 has not yet softened at the temperature at which the polylactic acid resin contained in the laminate layer 21 softens, the spunbond nonwoven fabric layer 10 is not damaged and can maintain its function as a filter.
- the same phenomenon can be used to bond the spunbond nonwoven fabric layer 10 and the paperboard 20 or tag 30 together.
- the pair of heating nip rolls used in the method for manufacturing the extraction bag (sheet for extraction bag) of the present invention may be a combination of two flat rolls, but one may be an embossing roll and the other may be a flat roll.
- Crystallinity (%) A test piece was taken from the nonwoven fabric and set in a differential scanning calorimeter (DSC) (manufactured by TA INSTRUMENTS, product number 2920MDSC V2.6A). Thereafter, the temperature was raised to 240° C. at a rate of 10° C./min, and the heat of crystallization ⁇ Hc and the heat of crystal melting ⁇ Hm were measured. Then, the crystallinity of the nonwoven fabric was calculated based on the above formula (1).
- DSC differential scanning calorimeter
- Example 1 As shown in FIG. 1, a paperboard (basis weight: 200 g/m 2 ) having a laminate layer (thickness: 40 ⁇ m) was laminated on a spunbond nonwoven fabric (basis weight: 15 g/m 2 ) containing a polylactic acid resin with a degree of crystallinity of 50%, and passed through heated nip rolls as a heat sealing treatment to prepare an extraction bag of Example 1.
- the heat sealing treatment was performed at a temperature of 110° C. and a pressure of 0.5 MPa for 0.5 seconds.
- the laminate layer was formed by extrusion lamination in which the polylactic acid resin in a fluid state was extruded onto the paperboard. A polylactic acid resin having a degree of crystallinity of 3% was used.
- the extraction bag of Example 1 was actually a sheet for an extraction bag before being shaped into a bag, but it was evaluated as an extraction bag because the characteristics of the material itself did not change.
- Extraction bags of Examples 2 to 14 and Comparative Examples 1 and 2 were produced in the same manner as the extraction bags of Example 1, except that they were set to have the configuration shown in Table 1.
- the meltblown nonwoven fabric layer was laminated on the spunbond nonwoven fabric layer.
- a laminate layer was formed by dry lamination in which stretched polylactic acid films were bonded together.
- Table 1 shows the configurations of the extraction bags of Examples 1-14 and the extraction bags of Comparative Examples 1-2, as well as the evaluation results.
- the heat sealing temperature was set to 130°C and the crystallinity of the polylactic acid resin contained in the laminate layer and the crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer were set to be equal (that is, the crystallinity of the polylactic acid resin contained in the laminate layer was not set to be smaller than the crystallinity of the polylactic acid resin contained in the spunbond nonwoven fabric layer), the resin in the laminate layer was not softened, and the spunbond nonwoven fabric layer and the paperboard were not bonded.
- the extraction bag and extraction bag sheet of the present invention can be used as a drip bag used for extracting coffee and a tea bag used for extracting tea, but can also be used as a soup pack used for extracting soup stock such as bonito and kelp.
- the brewing bag and the method for manufacturing the brewing bag sheet of the present invention can be used to manufacture a filter for each of the above uses.
- meltblown nonwoven fabric layer 15 meltblown nonwoven fabric layer 20 paperboard (attached member) 21 laminate layer 30 tag (attached member) 31 laminate layer 100 drip bag (extraction bag) 200 drip bag (extraction bag) 300 tea bags (extraction bag)
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Abstract
Description
ポリ乳酸樹脂を含むスパンボンド不織布層と、付属部材とを接合してなる抽出袋であって、
前記付属部材の少なくとも前記スパンボンド不織布層に接する面にポリ乳酸樹脂を含むラミネート層が設けられており、
前記ラミネート層に含まれるポリ乳酸樹脂の結晶化度は、前記スパンボンド不織布層に含まれるポリ乳酸樹脂の結晶化度より小さく設定されていることにある。
前記ラミネート層に含まれるポリ乳酸樹脂の結晶化度と、前記スパンボンド不織布層に含まれるポリ乳酸樹脂の結晶化度との差が10%以上に設定されていることが好ましい。
前記スパンボンド不織布層の上に、ポリ乳酸樹脂を含むメルトブロー不織布層が設けられていることが好ましい。
ポリ乳酸樹脂を含むスパンボンド不織布層と、付属部材とを接合してなる抽出袋の製造方法であって、
前記付属部材の少なくとも前記スパンボンド不織布層に接する面にポリ乳酸樹脂を含むラミネート層が設けられており、
前記ラミネート層に含まれるポリ乳酸樹脂の結晶化度は、前記スパンボンド不織布層に含まれるポリ乳酸樹脂の結晶化度より小さく設定されており、
前記スパンボンド不織布層と、前記付属部材とを接合するに際し、ポリ乳酸樹脂のガラス転移温度Tgより30~100℃高い温度を付与する加熱工程を実施することにある。
ポリ乳酸樹脂を含むスパンボンド不織布層と、付属部材とを接合してなる抽出袋用シートであって、
前記付属部材の少なくとも前記スパンボンド不織布層に接する面にポリ乳酸樹脂を含むラミネート層が設けられており、
前記ラミネート層に含まれるポリ乳酸樹脂の結晶化度は、前記スパンボンド不織布層に含まれるポリ乳酸樹脂の結晶化度より小さく設定されていることにある。
ポリ乳酸樹脂を含むスパンボンド不織布層と、付属部材とを接合してなる抽出袋用シートの製造方法であって、
前記付属部材の少なくとも前記スパンボンド不織布層に接する面にポリ乳酸樹脂を含むラミネート層が設けられており、
前記ラミネート層に含まれるポリ乳酸樹脂の結晶化度は、前記スパンボンド不織布層に含まれるポリ乳酸樹脂の結晶化度より小さく設定されており、
前記スパンボンド不織布層と、前記付属部材とを接合するに際し、ポリ乳酸樹脂のガラス転移温度Tgより30~100℃高い温度を付与する加熱工程を実施することにある。
本発明の抽出袋用シートは、基本的構成として、ポリ乳酸樹脂を含むスパンボンド不織布層と、付属部材とを積層した積層体を含むものである。付属部材は、その表面(少なくともスパンボンド不織布層に接する面)にポリ乳酸樹脂を含む材料をラミネート加工したものである。ラミネート加工の方法としては、押出ラミネート、ドライラミネート、熱ラミネート、ウェットラミネート等が知られているが、後述するように、ラミネート層に含まれるポリ乳酸樹脂の結晶化度が、スパンボンド不織布層に含まれるポリ乳酸樹脂の結晶化度より小さくなれば、どのような加工法を用いても問題はない。付属部品としては、例えば、本発明の抽出袋用シートから作製した抽出袋をカップ等の容器に係止させるための係止片、抽出袋に取り付けられる糸付きのタグ、及び抽出袋を湯中で上下させるための薄板状部材等が挙げられる。スパンボンド不織布層の上には、必要に応じて、ポリ乳酸樹脂を含むメルトブロー不織布層が設けられる。
本発明の抽出袋は、本発明の抽出袋用シートを袋状に製袋加工したものである。製袋加工の方法としては、熱又は超音波による溶着、接着剤を用いた接合、糸を用いた縫合などが挙げられる。以下、本発明の抽出袋にかかる代表的な三つの実施形態について説明する。
図1は、本発明の第一実施形態にかかる抽出袋の積層構造を模式的に示した断面図である。この抽出袋は、スパンボンド不織布層10と、付属部材としての板紙20とを接合したドリップバッグ100として使用されるものである。
スパンボンド不織布層10は、目的の成分を抽出するためのフィルタとして機能する層である。スパンボンド不織布層10は、紡糸ノズルから押し出された溶融樹脂に高速のガス流を吹き付けることにより牽引、延伸させつつ冷却固化して繊維を形成し、この繊維をコレクター上に集積してウェブとすることにより形成される。第一実施形態にかかるドリップバッグ100では、スパンボンド不織布層10を構成する樹脂として、生分解性樹脂であるポリ乳酸樹脂が用いられる。スパンボンド不織布層10の目付は、8~20g/m2とすることが好ましく、12~20g/m2がより好ましい。
板紙20は、ドリップバッグ100をカップ等の容器に係止させる係止片を構成するための部材である。そのため、ある程度の剛性を有するように、板紙の目付は、150~300g/m2とすることが好ましい。
第一実施形態にかかるドリップバッグ100は、スパンボンド不織布層10に板紙20を接合したものであるが、両者の接合は、スパンボンド不織布層10と板紙20とを積層して加熱し、板紙20の表面のラミネート層21に含まれるポリ乳酸樹脂を軟化させ、軟化したポリ乳酸樹脂をスパンボンド不織布層10の隙間に食い込ませることにより行われる。従って、スパンボンド不織布層10に対して板紙20を良好に接合させるためには、ポリ乳酸樹脂が軟化するメカニズムを把握し、適切な条件下で接合(加熱)することが重要となる。ここで、ポリ乳酸樹脂は、結晶相と非晶相との間で相転移可能な結晶性高分子である。ポリ乳酸樹脂は、他の一般的な高分子材料と同様に、ガラス転移温度を超えると徐々に軟化するが、非晶部分が多いと軟化し易く、結晶状態では容易に軟化しないという性質を有する。そして、ポリ乳酸樹脂の結晶化度が高いほど、高い耐熱性を有するものとなる。
χc(%) = (ΔHm-ΔHc)/Q × 100 ・・・(1)
から算出される。なお、Qは完全結晶の融解熱量であり、ポリ乳酸樹脂の場合、Q=93J/gである。
図2は、本発明の第二実施形態にかかる抽出袋の積層構造を模式的に示した断面図である。この抽出袋は、スパンボンド不織布層10とメルトブロー不織布層15とを積層し、この積層体に板紙20を接合したコーヒー用のドリップバッグ200として使用されるものである。第二実施形態にかかるドリップバッグ200は、第一実施形態にかかるドリップバッグ100において、スパンボンド不織布層10の上に、メルトブロー不織布層15を設けたものである。従って、以下の項目では、メルトブロー不織布層15についてのみ説明し、第一実施形態にかかるドリップバッグ100の構成と同様の構成については、詳細な説明を省略する。
メルトブロー不織布層15は、製袋する際の接着剤や内容物の粉漏れ防止として機能する層である。メルトブロー不織布層15は、紡糸ノズルから押し出された溶融樹脂に高温高速のガス流を吹き当てることにより、その溶融樹脂を引き伸ばして繊維化しつつ飛散させ、これをコレクター上に集積してシート状に固化させることにより形成される。第二実施形態にかかるドリップバッグ200では、メルトブロー不織布層15を構成する樹脂として、スパンボンド不織布層10と同様に、生分解性樹脂であるポリ乳酸樹脂が用いられることが好ましい。このように、すべての不織布層にポリ乳酸樹脂が含まれるようにすることで、ドリップバッグ200全体として環境負荷を低減しつつ、スパンボンド不織布層10とメルトブロー不織布層15との積層構造により、フィルタとしての優れた機能を持たせることができる。メルトブロー不織布層15の目付は、1~10g/m2とすることが好ましく、6~10g/m2がより好ましい。
図3は、本発明の第三実施形態にかかる抽出袋の積層構造を模式的に示した断面図である。この抽出袋は、スパンボンド不織布層10と、付属部材としてのタグ30とを接合したティーバッグ300として使用されるものである。なお、この第三実施形態にかかるティーバッグ300においても、第二実施形態にかかるドリップバッグ200のように、スパンボンド不織布層10の上にメルトブロー不織布層15を積層した構成を採用することも可能である。第三実施形態にかかるティーバッグ300は、第一実施形態にかかるドリップバッグ100において、板紙20の代わりにタグ30を設けたものである。従って、以下の項目では、タグ30についてのみ説明し、第一実施形態にかかるドリップバッグ100の構成と同様の構成については、詳細な説明を省略する。
タグ30は、ティーバッグ300を糸で吊るすときに指で摘まむ部材であり、未使用時には袋の表面に接着されており、使用時に袋から剥がされる。タグの目付は、50~150g/m2とすることが好ましい。
本発明の抽出袋(抽出袋用シート)は、例えば、加熱ニップロールを用いて製造することができる。なお、加熱ニップロールは、従来公知の製造装置につき、図示は省略する。
不織布から試験片を採取し、示差走査熱量計(DSC)(TA INSTRUMENTS社製、品番2920MDSC V2.6A)に試験片をセットした。その後、昇温温度を10℃/分として240℃まで昇温し、結晶化発熱量ΔHcと結晶融解熱量ΔHmとを測定した。そして、前述の式(1)に基づいて不織布の結晶化度を算出した。
「JIS L 1913 一般不織布試験方法」に準拠して、不織布から10cm四方の試験片を採取し、質量を測定して、不織布の目付を算出した。
ヒートシール処理後の抽出袋の状態について、以下の基準により目視により評価した。
良好:スパンボンド不織布層がダメージを受けておらず、且つ板紙が接合されている。
不良:スパンボンド不織布層がダメージを受けている、又は板紙が接合されていない。
図1に示すように、結晶化度50%のポリ乳酸樹脂を含むスパンボンド不織布(目付:15g/m2)の上に、ラミネート層(厚み:40μm)を有する板紙(目付:200g/m2)を積層し、ヒートシール処理として加熱ニップロールに通すことにより、実施例1の抽出袋を作製した。ヒートシール処理は、温度110℃、圧力0.5MPaで、0.5秒間行った。ラミネート層は、流動状態にあるポリ乳酸樹脂を板紙の上に押し出す押出ラミネートにより形成した。ポリ乳酸樹脂は、結晶化度が3%のものを使用した。なお、実施例1の抽出袋は、実際には袋状にする前の抽出袋用シートであるが、素材の特性自体は変わらないため、抽出袋として評価した。
表1に示す構成を有するように設定したこと以外は実施例1の抽出袋と同様にして、実施例2~14、及び比較例1~2の抽出袋を作製した。なお、実施例9~11の抽出袋においては、図2に示すように、メルトブロー不織布層をスパンボンド不織布層の上に積層した。また、実施例13及び14、並びに比較例1~2の抽出袋においては、延伸ポリ乳酸フィルムを貼り合わせるドライラミネートにより、ラミネート層を形成した。
15 メルトブロー不織布層
20 板紙(付属部材)
21 ラミネート層
30 タグ(付属部材)
31 ラミネート層
100 ドリップバッグ(抽出袋)
200 ドリップバッグ(抽出袋)
300 ティーバッグ(抽出袋)
Claims (6)
- ポリ乳酸樹脂を含むスパンボンド不織布層と、付属部材とを接合してなる抽出袋であって、
前記付属部材の少なくとも前記スパンボンド不織布層に接する面にポリ乳酸樹脂を含むラミネート層が設けられており、
前記ラミネート層に含まれるポリ乳酸樹脂の結晶化度は、前記スパンボンド不織布層に含まれるポリ乳酸樹脂の結晶化度より小さく設定されている抽出袋。 - 前記ラミネート層に含まれるポリ乳酸樹脂の結晶化度と、前記スパンボンド不織布層に含まれるポリ乳酸樹脂の結晶化度との差が10%以上に設定されている請求項1に記載の抽出袋。
- 前記スパンボンド不織布層の上に、ポリ乳酸樹脂を含むメルトブロー不織布層が設けられている請求項1又は2に記載の抽出袋。
- ポリ乳酸樹脂を含むスパンボンド不織布層と、付属部材とを接合してなる抽出袋の製造方法であって、
前記付属部材の少なくとも前記スパンボンド不織布層に接する面にポリ乳酸樹脂を含むラミネート層が設けられており、
前記ラミネート層に含まれるポリ乳酸樹脂の結晶化度は、前記スパンボンド不織布層に含まれるポリ乳酸樹脂の結晶化度より小さく設定されており、
前記スパンボンド不織布層と、前記付属部材とを接合するに際し、ポリ乳酸樹脂のガラス転移温度Tgより30~100℃高い温度を付与する加熱工程を実施する抽出袋の製造方法。 - ポリ乳酸樹脂を含むスパンボンド不織布層と、付属部材とを接合してなる抽出袋用シートであって、
前記付属部材の少なくとも前記スパンボンド不織布層に接する面にポリ乳酸樹脂を含むラミネート層が設けられており、
前記ラミネート層に含まれるポリ乳酸樹脂の結晶化度は、前記スパンボンド不織布層に含まれるポリ乳酸樹脂の結晶化度より小さく設定されている抽出袋用シート。 - ポリ乳酸樹脂を含むスパンボンド不織布層と、付属部材とを接合してなる抽出袋用シートの製造方法であって、
前記付属部材の少なくとも前記スパンボンド不織布層に接する面にポリ乳酸樹脂を含むラミネート層が設けられており、
前記ラミネート層に含まれるポリ乳酸樹脂の結晶化度は、前記スパンボンド不織布層に含まれるポリ乳酸樹脂の結晶化度より小さく設定されており、
前記スパンボンド不織布層と、前記付属部材とを接合するに際し、ポリ乳酸樹脂のガラス転移温度Tgより30~100℃高い温度を付与する加熱工程を実施する抽出袋用シートの製造方法。
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JP2000336570A (ja) | 1999-05-28 | 2000-12-05 | Kuraray Co Ltd | 生分解性を有するコーヒー抽出用シート材料 |
JP2002336127A (ja) * | 2001-05-15 | 2002-11-26 | Mitsui Chemicals Inc | 飲用材料充填用包装体 |
JP2011078747A (ja) * | 2009-09-08 | 2011-04-21 | Daiki Shoji Kk | ドリップバッグ |
JP2016168569A (ja) | 2015-03-13 | 2016-09-23 | 大紀商事株式会社 | 抽出用シート、抽出用フィルターおよび抽出用バッグ |
JP2018086261A (ja) * | 2016-11-18 | 2018-06-07 | 大紀商事株式会社 | ドリップバッグ |
WO2021210053A1 (ja) * | 2020-04-13 | 2021-10-21 | 大紀商事株式会社 | 抽出バッグ |
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JP2000336570A (ja) | 1999-05-28 | 2000-12-05 | Kuraray Co Ltd | 生分解性を有するコーヒー抽出用シート材料 |
JP2002336127A (ja) * | 2001-05-15 | 2002-11-26 | Mitsui Chemicals Inc | 飲用材料充填用包装体 |
JP2011078747A (ja) * | 2009-09-08 | 2011-04-21 | Daiki Shoji Kk | ドリップバッグ |
JP2016168569A (ja) | 2015-03-13 | 2016-09-23 | 大紀商事株式会社 | 抽出用シート、抽出用フィルターおよび抽出用バッグ |
JP2018086261A (ja) * | 2016-11-18 | 2018-06-07 | 大紀商事株式会社 | ドリップバッグ |
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