CN101522538B - 易裂性卡扣带及其制造方法、带有易裂性卡扣带的包装袋及其制造装置以及制造方法 - Google Patents

易裂性卡扣带及其制造方法、带有易裂性卡扣带的包装袋及其制造装置以及制造方法 Download PDF

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Publication number
CN101522538B
CN101522538B CN2007800352916A CN200780035291A CN101522538B CN 101522538 B CN101522538 B CN 101522538B CN 2007800352916 A CN2007800352916 A CN 2007800352916A CN 200780035291 A CN200780035291 A CN 200780035291A CN 101522538 B CN101522538 B CN 101522538B
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mentioned
shaped part
wall section
convex shaped
thinner wall
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CN101522538A (zh
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南波芳典
田中研一
后藤修一
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Idemitsu Unitech Co Ltd
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Idemitsu Unitech Co Ltd
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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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
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    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/10—Slide fasteners with a one-piece interlocking member on each stringer tape
    • A44B19/16—Interlocking member having uniform section throughout the length of the stringer
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    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
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    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/474—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
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    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D5/00—Producing elements of slide fasteners; Combined making and attaching of elements of slide fasteners
    • B29D5/10—Producing elements of slide fasteners; Combined making and attaching of elements of slide fasteners the interlocking members being formed by continuous profiled strip
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2516—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener
    • B65D33/2533—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener the slide fastener being located between the product compartment and the tamper indicating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
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    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
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    • B65D33/2541—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape
    • 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
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
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Abstract

安装在袋体(2)的内表面上的卡扣带(3A)的凸形部件(32)的带状基部(321)具有：设有咬合部(31)的本体(3211)、被设置在本体(3211)的开口部侧的第一凸状部(3212)、被设置在第一凸状部(3212)的开口部侧的薄壁部(3213)、被设置在薄壁部(3213)的开口部侧的第二凸状部(3214)。凹形部件(33)的带状基部(331)具有：本体(3311)、第一凸状部(3312)、薄壁部(3313)、第二凸状部(3314)。若将卡扣带(3A)熔接在袋体(2)上，则在薄壁部(3213)以及(3313)和袋体(2)的膜之间形成空隙。

Description

易裂性卡扣带及其制造方法、带有易裂性卡扣带的包装袋及其制造装置以及制造方法
技术领域
本发明涉及易裂性卡扣带及其制造方法、带有易裂性卡扣带的包装袋及其制造装置以及制造方法。 
背景技术
作为用于包装食品、药品、医疗品、杂货等各种物品的包装材料，使用以下这样的带有卡扣带的包装袋：在袋的开口部配设有由凸形部件以及凹形部件形成的凹凸咬合的一对的带状的卡扣带，使该咬合状态开闭自如。 
这样的带有卡扣带的包装袋，通过卡扣带的上部被密封而被密封，在开封时，将形成在包装袋的两侧的切口等作为开始位置而撕裂袋本体的膜，从而能够开封。 
在如此地开封带有卡扣带的包装袋时，存在卡扣带附近的膜被切断因此难以抓住袋本体的问题，期望在既定的位置切断袋本体膜的技术。 
因此，在专利文献1中公开有以下这样的技术：在卡扣带的一部分上配设有开封绳，借助拉拽开封绳而撕裂袋本体的膜。此外，在专利文献2中记载了以下这样的卡扣带：为了将撕裂引导至卡扣带的带部而使用撕裂性的树脂且使其切断。进而，在专利文献3中公开了以下这样的技术：为了在既定的位置断开切断带而对切断带使用高刚性的材料而使其切断。 
专利文献1：特开2004-276925号公报 
专利文献2：特开2004-244027号公报 
专利文献3：特开平10-059384号公报 
但是，在专利文献1中，因为开封绳被配设在卡扣带的一部分上，所以在借助开封绳进行撕裂时，存在必须同时地切断卡扣带的局部或者全部而孩子及老人难以打开的问题。 
此外，在专利文献2中，因为易裂性树脂由结晶性聚烯烃和环状聚烯烃的一个的不相溶的树脂的混合物构成，所以存在易切断树脂层不溶合而从撕裂的面分别剥离不溶合的树脂而从撕裂的卡扣产生切断残渣(线状/纤维状)的问题。 
此外，在专利文献3中，存在切断带及为了获得直线切断性的引导线附加在卡扣带及制袋机上的形态，存在制袋工序不简易的状况。 
进而，在上述这样的以往方法中，存在在切断难以切断的膜时没有能够进行引导的部件而会切断直到卡扣带的不良情况。 
发明内容
本发明的目的在于提供一种易裂性卡扣带和其制造方法以及带有易裂性卡扣带的包装袋其制造装置以及制造方法，在切开且开封卡扣带时，能够在既定的位置容易地切断包装袋且不产生切断残渣。 
本发明的易裂性卡扣带，具有：一对的凸形部件以及凹形部件相互地咬合的咬合部、分别与上述咬合部连接的带状基部，被安装在包装袋的袋体内表面上，其中，上述带状基部中的至少一方具有：设置有上述咬合部的本体、设置在该本体的开口部侧且比上述本体的厚度厚的第一凸状部、设置在该第一凸状部的开口部侧且比上述第一凸状部以及上述本体的厚度薄的薄壁部、设置在该薄壁部的开口部侧且比上述薄壁部以及上述本体的厚度厚的第二凸状部，上述第一凸状部和上述第二凸状部的各自的与上述袋体内表面对置的对置面大致位于同一面，且在相对于这些对置面后退的位置上设有上述薄壁部而形成阶梯差，使上述薄壁部为撕裂引导片。 
在本发明中，在设置有咬合部的本体的开口部侧设置有第一凸状部，在第一凸状部的开口部侧形成有比第一凸状部以及本体的厚度薄的薄壁部，在薄壁部的开口部侧形成有比薄壁部以及本体的厚度厚的第二凸状部。即薄壁部被夹在厚度厚的第一凸状部和第二凸状部之间。 
因为薄壁部的厚度薄，所以在开封时，将薄壁部作为撕裂引导片而被切断。此外，即使错误地切断线从薄壁部偏离，厚度厚的第一凸状部以及第二凸状部也不会被切断，能够令切断线回到薄壁部的位置。此外，在切断之后第一凸状部残留下来，因为比本体的厚度厚，所以手拉在第一凸状部上而易于抓住。 
此外，第一凸状部和第二凸状部，因为比本体的厚度厚，所以通过第一凸状部和第二凸状部引导而进行切断。若使本体的厚度为与第一凸状部和第二凸状部大致相同的厚度，则卡扣带的密封温度变得非常的高，使凸形部件和凹形部件变形，不实用。 
从而，在开封安装有该卡扣带的包装袋时，将薄壁部作为撕裂引导片 而使用，能够撕裂该引导片而能够容易地开封。 
此外，因为薄壁部被设置在比第一凸状部以及第二凸状部的安装在袋体内表面一侧的面更后退的位置上，所以在向包装袋的袋体内表面上安装了该卡扣带时，在薄壁部和基材膜之间形成有空隙。借助该空隙，薄壁部更易于被切断。 
此外，因为这样的构成，所以能够在薄壁部和第一凸状部以及第二凸状部之间形成阶梯差，在开封安装有该卡扣带的包装袋时，沿着该阶梯差而薄壁部易于被切断。从而，在开封包装袋时，能够使基材膜的切断获得直进性。 
进而，带状基部的本体为以往的厚度，仅仅使第一凸状部和第二凸状部的厚度增厚，所以不会影响卡扣带本体的密封性。 
在本发明的易裂性卡扣带中，优选上述凸形部件以及上述凹形部件的各自的上述带状基部具有上述本体和上述第一凸状部和上述薄壁部和上述第二凸状部。 
在本发明中，因为在卡扣带的一对的凸形部件和凹形部件的双方上设置有第一凸状部和薄壁部和第二凸状部，所以能够适用于将被设置在凸形部件和凹形部件上的双方的薄壁部和包装袋的基材膜同时地撕裂而开封的带有卡扣带的包装袋。此时，在薄壁部的两端形成有凹口，且将凹口作为开封开始位置，在使薄壁部和基材膜重合的状态下能够一次地撕裂而开封。 
本发明的易裂性卡扣带，在设置在上述凸形部件和上述凹形部件上的上述薄壁部中，一方的薄壁部的长度也可以和另一方的薄壁部的长度不同。 
在本发明中，因为被设置在凸形部件上的薄壁部和被设置在凹形部件上的薄壁部的长度不同，所以在对置的薄壁部上产生阶梯差。 
若撕裂安装有如此构成的卡扣带的包装袋而开封，则对置的基材膜的切断线为错开的状态，在再次开封时，易于抓住包装袋的开口部的基材膜。 
在本发明的易裂性卡扣带中，优选上述凸形部件或者上述凹形部件的任意一方的上述带状基部具有上述本体和上述第一凸状部和上述薄壁部和上述第二凸状部，另一方的上述带状基部具有上述本体和上述第一凸状部。 
在本发明中，薄壁部和第二凸状部仅仅被设置在凸形部件和凹形部件 中的任意一方的带状基部上，所以在开封时，将设置在一方的薄壁部和对置的包装袋的基材膜同时地切断。因为薄壁部只被设置在一方，所以能够用更小的力进行开封。此外，因为在薄壁部和第二凸状部以及第一凸状部之间形成有阶梯差，所以沿着这些中的任意的阶梯差和在对置的带状基部的第一凸状部的开口部侧端面上形成的阶梯差而被切断。从而，能够维持切断线的直线性。 
在本发明的易裂性卡扣带中，优选在上述本体的比上述咬合部更靠近非开口部侧的位置上设置有与上述第一凸状部和上述第二凸状部的厚度具有相同的高度的一条或者多条的肋。 
在本发明中，以易裂性卡扣带的开口部侧和非开口部侧的高度相同的方式设置有一条或多条的肋。由此，在将该易裂性卡扣带熔接在袋体的内表面上时，密封杆与卡扣带的整面均等地接触，所以能够稳定且正确地进行卡扣带的熔接。 
本发明的易裂性卡扣带优选为，上述薄壁部的厚度为0.12mm以下，上述第二凸状部以及上述第一凸状部的厚度为0.20mm以上1mm以下。 
在本发明中，因为薄壁部的厚度为0.12mm以下，所以能够容易地切断薄壁部。若超过0.12mm，则撕裂阻力变大，切断性降低。 
此外，因为第二凸状部以及本体的第一凸状部的厚度为0.20mm～1mm，所以在第二凸状部以及本体的第一凸状部的位置上不会被切断。若比0.20mm小，则在开封时可能卡扣带被一起切断，若比1mm大，则可能引起使制袋时的密封性及效率恶化等的不良情况。更好的范围是0.3mm～0.5mm。 
在本发明的易裂性卡扣带中，优选上述薄壁部的宽度为0.5mm以上5mm以下。 
在此，薄壁部的宽度为设置在薄壁部的两邻上的第一凸状部和第二凸状部的距离。 
根据本发明，因为使薄壁部的宽度为0.5mm以上5mm以下，所以能够在薄壁部的位置上可靠地进行切断。若薄壁部的宽度比0.5mm小，则难以切断，若超出5mm，则可能越过第一凸状部以及第二凸状部而切断。更好的范围是1mm以上3mm以下。 
本发明的易裂性卡扣带优选为，上述第一凸状部和上述第二凸状部和上述薄壁部由无规聚丙烯形成。 
根据本发明，因为第一凸状部和第二凸状部和薄壁部由无规聚丙烯形成，所以具有良好的易裂性，且不会由切断的部分产生切断残渣(须)。 
本发明的易裂性卡扣带优选为，上述第一凸状部以及第二凸状部由相同的树脂形成，上述第一凸状部及第二凸状部与上述薄壁部由不同的树脂形成，上述第一凸状部及第二凸状部与上述本体由不同的树脂形成。 
用于第一凸状部以及第二凸状部的树脂没有被特别地限定，例如能够使用低密度聚乙烯、直链状低密度聚乙烯、聚丙烯、聚苯乙烯等。此外，用于本体的树脂只要是使卡扣带的咬合部能够再次开闭即可，能够使用与用于第一凸状部以及第二凸状部的树脂相同的树脂。另一方面，薄壁部只要使用与上述树脂相溶性高的树脂且具有优异的切断性就可以不被特别地限定，例如，能够使用低密度聚乙烯、直链状低密度聚乙烯、聚丙烯、聚对苯二甲酸乙二醇酯、聚对苯二甲酸丁二醇酯、环烯烃共聚物等。使这些树脂组合而能够任意地选择使用的树脂，以使薄壁部与第一凸状部及第二凸状部为不同的树脂，且第一凸状部和本体为不同的树脂。 
如此，因为易裂性卡扣带由不同的树脂构成，且因为在薄壁部和第二凸状部之间、或薄壁部和第一凸状部之间、或者第一凸状部和本体之间进行层间剥离，所以具有良好的易裂性，且不会由切断的部分产生切断残渣(须)。此外，也能够实现切断线的直线性。 
本发明的易裂性卡扣带也可以为，上述第一凸状部、上述第二凸状部及上述薄壁部由相同的树脂形成，上述第一凸状部、上述第二凸状部及上述薄壁部与上述本体由不同的树脂形成。 
用于上述第一凸状部和上述第二凸状部和上述薄壁部的树脂不被特别地限定，例如能够使用低密度聚乙烯、直链状低密度聚乙烯、聚丙烯、聚苯乙烯等。此外，用于上述本体的树脂也不被特别地限定，能够从上述树脂中进行任意地组合而使用，以使与被用于上述第一凸状部和上述第二凸状部和上述薄壁部的树脂不同。 
根据本发明，因为在由不同的树脂形成的第一凸状部和本体之间进行层间剥离，所以具有良好的易裂性，且不会由切断的部分产生切断残渣(须)。 
本发明的易裂性卡扣带中，上述第一凸状部和上述第二凸状部和上述薄壁部和上述本体也可以分别由不同的树脂形成。 
使用的树脂不被特别地限定，与上述相同，能够使用低密度聚乙烯、直链状低密度聚乙烯、聚丙烯、聚苯乙烯等，能够进行任意地组合而使用，以使上述第一凸状部和上述第二凸状部和上述薄壁部和上述本体为各自不同的树脂。 
根据本发明，因为分别由不同的树脂形成，因为在薄壁部和第二凸状部之间、薄壁部和第一凸状部之间、第一凸状部和本体之间中的任意的树脂间进行层间剥离，所以具有良好的易裂性，不会由切断的部分产生切断残渣(须)。 
本发明的易裂性卡扣带优选为，在上述第一凸状部、上述第二凸状部以及上述本体的向袋体内表面上安装的一侧的面上设有密封层。 
根据本发明，因为设有密封层，所以能够选择将与被用于袋体的密封剂层的树脂相溶性好的树脂作为密封层。从而，与被用于袋体的树脂无关，能够提供一种粘接性优异的易裂性卡扣带。 
本发明的易裂性卡扣带优选为，形成上述密封层的树脂，熔点比形成上述第一凸状部、上述第二凸状部以及上述本体的树脂的熔点低，且含有以下的(A)以及(B)。 
(A)密度920kg/m3以下、MFR为5.0g/10分以下的金属茂类直链低密度聚乙烯为50质量％以上100质量％以下。 
(B)由丙烯和碳数4～8的α-烯烃共聚物构成的组成物为0质量％以上50质量％以下。 
根据本发明，因为密封层使用含有上述(A)以及(B)的树脂，所以能够提供一种与袋体的粘接性优异的易裂性卡扣带。 
本发明的易裂性卡扣带的制造方法的特征为，借助共挤压而在一个工序中制造具有上述咬合部的上述本体、上述第一凸状部、第二凸状部和上述薄壁部。 
在本发明中，因为能够借助共挤压而在一个工序中制造上述易裂性卡扣带，所以在制造工序中不浪费工夫，能够简单地制造。 
本发明的带有易裂性卡扣带的包装袋的特征为，具有上述的易裂性卡扣带和安装该易裂性卡扣带的袋体，在上述袋体的内表面、与上述袋体的内表面对置的薄壁部的面、与该薄壁部的面交叉的上述第一凸状部的面以及上述第二凸状部的面之间形成有空隙。 
根据本发明，带有易裂性卡扣带的包装袋，因为在袋体内表面、薄壁 部、第一凸状部和第二凸状部之间形成有空隙，所以能够获得与上述相同的作用效果。 
本发明的带有易裂性卡扣带的包装袋的特征为，沿着与该包装袋的上述易裂性卡扣带交叉的方向形成有侧密封部，上述侧密封部中的上述薄壁部的宽度宽于比上述侧密封部更靠近内侧的上述薄壁部的宽度。 
根据本发明，因为包装袋的侧密封部中的薄壁部被加宽地形成，所以能够在该位置上可靠地形成凹口，能够提供一种易裂性优异的带有卡扣带的包装袋。 
本发明的制造带有易裂性卡扣带的包装袋的制造装置的特征为，具有用于压溃上述侧密封部中的上述薄壁部的一对的点密封杆(ポイントシ一ルバ一)，上述点密封杆的至少一方具有凸部，该凸部具有上述空隙的高度以上的高度。 
在以往的方法中，在压溃侧密封部的薄壁部时，溶融树脂进入至薄壁部，使侧密封部中的薄壁部变厚或变窄，难以形成凹口。 
根据本发明，设置在点密封杆上的凸部的端面，首先与薄壁部接触而进行溶融，所以之后溶融的第一凸状部以及第二凸状部的溶融树脂不能进入至薄壁部。从而，能够维持薄壁部的宽度和厚度。此外，优选凸部为大致梯形，借助使其成为大致梯形而能够加宽地形成薄壁部的宽度。 
从而，能够在侧密封部中的薄壁部上可靠地稳定地形成凹口，能够提供一种易裂性及品质都优异的制品。 
本发明的制造带有易裂性卡扣带的包装袋的制造装置，优选上述一对的点密封杆具有上述凸部的抵接面的大小各自不同的多个种类。 
根据本发明，因为具有多个种类的凸部的抵接面的大小不同的点密封杆，所以能够从凸部的抵接面的大小小的点密封杆阶段地密封。从而，能够可靠地更薄地更宽地形成薄壁部。 
本发明的带有易裂性卡扣带的包装袋的制造方法的特征为，在压溃上述薄壁部时，使上述凸部与上述薄壁部的位置对合，从上述薄壁部的中心向外侧进行溶融扁平化。 
根据本发明，如上所述，能够维持薄壁部的宽度，且借助进行溶融扁平化而能够更薄地更宽地形成薄壁部。从而，能够在侧密封部中的薄壁部上可靠地稳定地形成凹口，能够提供一种易裂性及品质都优异的制品。 
本发明的带有易裂性卡扣带的包装袋的制造方法，优选上述一对的点 密封杆，具有上述凸部的抵接面的大小各自不同的多个种类，且从上述凸部的抵接面的大小小的点密封杆依次地被密封。 
根据本发明，因为从凸部的抵接面的大小小的点密封杆依次地被密封，所以能够更稳定地将薄壁部扁平化。从而，能够可靠地更薄地更宽地形成薄壁部，能够易于形成凹口。 
附图说明
图1是表示本发明的第一实施方式的带有卡扣带的包装袋的主视图。 
图2是图1的II-II线剖视图。 
图3是表示本发明的第一实施方式的点密封工序的剖视图。 
图4是图3中的点密封工序完成后的侧密封部中的薄壁部的剖视图。 
图5是第二实施方式的带有卡扣带的包装袋的剖视图。 
图6是第三实施方式的带有卡扣带的包装袋的剖视图。 
图7是表示图2的变形例的剖视图。 
图8是表示图3的点密封工序的变形例的剖视图。 
图9是表示图3的点密封工序的变形例的剖视图。 
图10是表示图3的点密封工序的变形例的剖视图。 
图11是表示图3的点密封工序的变形例的剖视图。 
附图标记说明 
1A、1B、1C带有卡扣带的包装袋 
2袋体 
3A、3B、3C卡扣带 
32凸形部件 
33凹形部件 
321、331带状基部 
3211、3311本体 
3212、3312第一凸状部 
3213、3313薄壁部 
3214、3314第二凸状部 
具体实施方式
以下，参照附图说明本发明的实施方式。在各实施方式的说明中，省略或者简略说明标注同一附图标记的部件。 
[第一实施方式] 
首先，参照图1和图2说明本发明的第一实施方式。 
如图1所示，本实施方式的带有卡扣带的包装袋1A具有袋体2，该袋体2使作为包装材料的基材膜24重合而在其周缘形成侧密封部21以及顶端密封部22而形成，在袋体2的开口部23的内表面安装有卡扣带3A。 
图2表示卡扣带3A的截面构成。卡扣带3A由一对的凸形部件32以及凹形部件33构成，凸形部件32一体地形成有：被熔接在袋体2上的带状基部321、截面为大致箭头形状的头部322、以及连结该带状基部321和头部322的连结部323。此外，凹形部件33与上述凸形部件32相同，包括：熔接在袋体2上的带状基部331、与该带状基部331连结而形成的截面为圆弧形状的第1钩部332以及第2钩部333，该第1钩部332和第2钩部333以对置的方式形成。 
卡扣带3A中，凸形部件32的头部322和凹形部件33的第1钩部332及第2钩部333形成咬合部31，借助这些部件的分离或咬合，能够进行开封或者再次密封。 
带状基部321具有：设有咬合部31的本体3211、被设置在该本体3211的开口部侧的第一凸状部3212、与第一凸状部3212的开口部侧连接的薄壁部3213、与该薄壁部3213的开口部侧连接的第二凸状部3214。 
第一凸状部3212的基材膜24侧的面3212B和第二凸状部3214的基材膜24侧的面3214B大致位于同一面，薄壁部3213被设置在比这些面更退后的位置上。由此，在薄壁部3213和第一凸状部3212以及第二凸状部3214之间形成阶梯差。 
进而，薄壁部3213被设置在从第一凸状部3212的咬合部31侧的面3212C以及第二凸状部3214的咬合部31侧的面3214C退后的位置上。 
薄壁部3213的厚度优选0.12mm以下，在本实施方式中为0.1mm。此外，本体3211的厚度为0.15mm，本体3211的第一凸状部3212以及第二凸状部3214的厚度优选设定在0.20mm～1mm之间，例如可以是0.3mm。 
进而，薄壁部3213的宽度优选为0.5mm以上5mm以下，更优选的范围是1mm以上3mm以下，所以在本实施方式中为2mm。 
此外，在带状基部321的本体3211的比咬合部31更靠近非开口部侧设置有高度与第一凸状部3212以及第二凸状部3214的高度相同的肋34。肋34的数量没有被限定，在本实施方式中设置了4条。
带状基部321也同样地具有：设有咬合部31的本体3311、被设置在该本体3311的开口部侧的第一凸状部3312、被设置在第一凸状部3312上的薄壁部3313、与该薄壁部3313的开口部侧连接的第二凸状部3314。 
薄壁部3313被设置在与带状基部321的薄壁部3213相同的位置上，在薄壁部3313和第一凸状部3312以及第二凸状部3314之间形成阶梯差。 
各部的厚度能够与带状基部321相同，薄壁部3313的厚度为0.1mm，本体3311的厚度为0.15mm，本体3311的第一凸状部3312以及第二凸状部3314的厚度为0.3mm。 
此外，薄壁部3313的宽度为2mm。 
进而，在本体3311的比咬合部31更靠近非开口部侧设置有4条肋34。 
若使这样构成的卡扣带3A熔接在袋体2的内表面上，则在凸形部件32的薄壁部3213的面3213A和袋体2的膜和与薄壁部3213的面3213A交叉的第一凸状部3213的面3212A以及第二凸状部3214的面3214A的之间形成有空隙。此外，凹形部件33也同样，在薄壁部3313的面3313A、袋体2的膜、与薄壁部3313的面3313A交叉的第一凸状部3312的面3312A以及第二凸状部3314的面3314A之间形成有空隙。 
此外，在使卡扣带3A和表里的基材膜24重合的状态下，为开封开始位置的V字形的凹口25被分别形成在为薄壁部3213以及薄壁部3313的两端的位置上(图1)。 
在制造卡扣带3A时，能够借助共挤压成型法一体化地获得。如果借助共挤压法成形，则能够使制造工序简略化，能够降低制造成本，能够连续地稳定地制造卡扣带3A。 
在此，卡扣带3A的凸形部件32、凹形部件33只要能够再次开闭就不被特别地限定，优选由被广泛使用的低密度聚乙烯以及直链状低密度聚乙烯等的聚乙烯类树脂以及聚丙烯类树脂等的聚烯烃类树脂等形成。作为聚丙烯类树脂能够使用聚丙烯均聚物、成块聚丙烯、无规聚丙烯(RPP)、丙烯-乙烯-丁烯三元共聚合体、聚烯烃类特殊软质树脂(TPO树脂。例如原始聚合物TPO)等的热可塑性树脂，及能够使用混合了这些树脂的混合物。 
此外，作为形成袋体2的包装材料的基材膜24，优选使用在基材层242 上层叠密封剂层241而构成的层叠膜，但也可以与所需的性能相对应而使用在基材层242和密封剂层241之间作为中间层而层叠了未图示的气体屏蔽层、遮光层、强度提升层等的结构的层叠膜层。 
基材层242除了双向(双轴)延伸聚丙烯膜(OPP膜)之外，还能够适当地使用双向延伸聚对苯二甲酸乙二醇酯膜(PET膜)、双向延伸聚萘二甲酸乙二醇酯(PEN膜)等双向延伸聚酯膜，以及尼龙6、尼龙66、MXD6(聚己二酰间苯二甲胺)等双向延伸聚酰胺膜等，但也可根据需要而使用各种工程塑料膜。此外，可以单独使用这些，或者也可以组合地层叠地使用多个。 
在令中间层为气体屏蔽层时，中间层除了乙烯-乙烯醇共聚物皂化物(EVOH)、聚偏二氯乙烯(PVDC)、聚丙烯腈(PAN)等膜之外，能够使用铝箔，或者使用硅石、氧化铝、铝等的蒸镀层及PVDC的涂膜层。 
此外，使用硅石、氧化铝、铝等蒸镀层及PVDC的涂膜层时，可以在上述基材层242的内表面上进行蒸镀或涂敷而形成，此外，也可以蒸镀或涂敷于其他的双向延伸尼龙膜(ONy膜)、双向延伸聚对苯二甲酸乙二醇酯(PEN膜)、双向延伸聚丙烯膜(OPP膜)等而形成，并将该膜层叠在中间层上。 
其中，铝箔和铝蒸镀层因为不透明所以能够兼作遮光层。 
基材层242和中间层的膜的叠层能够采用已知的干燥层叠法或者挤压层叠法(多层层叠法)。 
最内层的密封剂层241能够使用低密度聚乙烯及聚丙烯(CPP)等。 
另外，密封剂层241的叠层可以将上述树脂制膜成膜状并通过干燥层叠法或者挤压层叠法而层叠，此外也可以挤压涂层而层叠上述树脂而获得基材膜24。 
使用如此获得的基材膜24和卡扣带3A且使用带卡扣带三面密封制袋机等制造带有卡扣带的包装袋1A。 
带卡扣带三面密封制袋机，使从带送出部送出的卡扣带3A位于从包装材料送出部送出的一对的基材膜24之间，经由使卡扣带3A和基材膜24熔接的卡扣带熔接部之后，对于基材膜24的运送方向以既定间隔熔接及熔断被运送的基材膜24而形成带有卡扣带的包装袋1A。 
在此，在形成带有卡扣带的包装袋1A的侧密封部21时，需要进行用于压溃卡扣带3A的点密封工序。在图3中展示了表示该点密封工序的剖视图。
具有点密封杆41以及42的制造装置4，在点密封杆41上设置有凸部43。凸部43的形状没有被特别地限定，但优选截面大致为梯形。该截面大致梯形的短边43B是凸部43的端面43a的截面，截面大致梯形的长边43C是凸部43的与端面43A对置的面的截面。使短边43B为与薄壁部3213的宽度相同长度的2mm，长边43C的长度只要比短边43B的长度长就不被特别地限定，在本实施方式中为4.2mm。此外，凸部43的高度只要为形成在薄壁部3213或者3313和基材膜24之间的空隙部的高度以下即可。 
在用这样构成的制造装置4进行点密封时，将凸部43从基材膜24上推到薄壁部3213以及3313上，借助从薄壁部3213以及3313的中心向外侧的方向施加力而进行溶融扁平化。 
另外，在用点密封杆41以及42进行点密封之前，可以用具有凸部的点密封杆进行密封，所述凸部具有比凸部43的抵接面小的抵接面。由此，能够进行更稳定地扁平化。 
在图4中展示了如此地进行了密封的侧密封部21中的薄壁部的剖视图。薄壁部3213以及3313的宽度被维持，且用截面为大致梯形的凸部43进行密封，从而薄的部分形成为比薄壁部3213以及3313宽。 
接着，说明开封本实施方式的带有卡扣带的包装袋1A的方法。 
在开封时，把持在薄壁部3213以及薄壁部3313的两端形成的任意一个凹口25的开口部侧的基材膜24和内容物侧的基材膜24，以该凹口25作为撕裂开始位置，前后地断裂从而开封。其结果，能够一次地撕裂薄壁部3213、薄壁部3313以及对置的基材膜24。 
之后，将卡扣带3A的咬合部31脱离，从而能够开封带有卡扣带的包装袋1A。在再次开封时，只要使凸形部件32与凹形部件33咬合而将咬合部31恢复为咬合状态即可。 
根据上述的卡扣带3A以及带有卡扣带的包装袋1A，能够获得以下的作用效果。 
(1)本实施方式的卡扣带3A，因为设置在对置的带状基部321以及331上的薄壁部3213以及3313被形成为薄壁状，所以在开封时，能够沿着薄壁部3213以及3313容易地切断，且能够开封带有卡扣带的包装袋1A。 
此外，因为设置在薄壁部3213以及3313的两端的第一凸状部3212 以及3312和第二凸状部3214以及3314被形成为比薄壁部3213以及3313厚度厚，所以在开封时，即使切断线从薄壁部3213以及3313偏离，第一凸状部3212及3312、第二凸状部3214及3314也不会被切断 
此外，在袋体2的内表面上安装了该卡扣带3A时，在袋体2的膜、与袋体2的膜对置的薄壁部3213的面3213A、与薄壁部3213的面3213A交叉的第一凸状部3212的面3212A以及第二凸状部3214的面3214A之间形成有空隙。由此，因为在薄壁部3213和第一凸状部3212之间以及第二凸状部3214之间产生阶梯差，所以在开封时，薄壁部3213易于沿着该阶梯差被切断。进而，因为也在薄壁部3213和第一凸状部3212以及第二凸状部3214的咬合部31侧形成有阶梯差，所以在薄壁部3213和第一凸状部3212以及第二凸状部3214之间更易于被切断。 
另外，带状基部331也同样地在袋体2的膜、与袋体2的膜对置的薄壁部3313的面3313A、与薄壁部3313的面3313A交叉的第一凸状部3312的面3312A以及第二凸状部3314的面3314A之间形成有空隙。由此，因为在薄壁部3313和第一凸状部3312之间以及第二凸状部3314之间产生阶梯差，所以在开封时，沿着该阶梯差薄壁部3313易于被切断。进而，因为也在薄壁部3313和第一凸状部3312以及第二凸状部3314的咬合部31侧形成有阶梯差，所以在薄壁部3313和第一凸状部3312以及第二凸状部3314之间更易于被切断。 
从而，因为能够将直线性付与切断线，所以卡扣带3A不会被破坏，且能够实现易开封性。 
(2)因为薄壁部的厚度为0.12mm以下，第一凸状部以及第二凸状部的厚度为0.20mm以上1mm以下，且薄壁部的宽度为0.5mm以上5mm以下，所以薄壁部易于被切断，第一凸状部以及第二凸状部难以被切断。从而，能够沿着薄壁部而易于被切断，且能够获得易裂性，且能够将直线性付与切断线。此外，因为第一凸状部以及第二凸状部没有过厚，所以密封效率高且不影响加工性。 
(3)具有本体3211、第一凸状部3212、薄壁部3213、第二凸状部3214的凸形部件32、和具有第一凸状部3312、薄壁部3313、第二凸状部3314的凹形部件33能够借助共挤压方法在一个工序中分别制造。从而，不浪费工夫及成本，能够简单地制造。 
(4)因为在带状基部321的本体3211的比咬合部31更靠近非开口部侧上设置有高度与第一凸状部3212以及第二凸状部3214相同的四条肋34，所以在使卡扣带3A和基材膜24熔接时，能够使密封杆与卡扣带3A的整面均等地接触。从而，能够可靠地稳定地将卡扣带3A熔接在基材膜24上。
(5)因为在点密封杆41上设有凸部43，所以若用此进行密封，则薄壁部3213以及3313首先与点密封杆41以及42接触且被熔接。从而，作为厚壁的第一凸状部3212以及第二凸状部3214的溶融树脂不进入至薄壁部3213以及3313，所以能够维持薄壁部3213以及3313的宽度。进而，使凸部43的截面大致为梯形，从而能够使薄的部分更宽。其结果，能够稳定地容易地形成凹口25，且能够使易裂性提高。 
[第二实施方式] 
接着，参照图5说明第二实施方式。 
第二实施方式中除了对置的薄壁部3213以及3313的长度不同这一点、被用于薄壁部3213以及3313和第一凸状部3212以及3312以及第二凸状部3214以及3314的树脂不同这一点之外，其他构成与第一实施方式相同，所以省略说明。 
如图5所示，凸形部件32的薄壁部3213的长度形成为比凹形部件33的薄壁部的长度短。 
此外，被用于薄壁部3213的树脂使用与被用于设置在薄壁部3213的两端的第二凸状部3214以及第一凸状部3212的树脂不同的树脂。作为被使用的树脂，例举有在第一实施方式中使用的树脂，且能够任意地选择不同的组合，例如，能够选择低密度聚乙烯和聚丙烯。 
在开封时，在薄壁部3213以及3313之间、第二凸状部3214以及3314之间或者在第一凸状部3212以及3312之间进行层间剥离。剥离位置如图5的A～D所示，在哪个切断面上都被高低不同地切断。 
在这样的第二实施方式的构成中，能够获得与第一实施方式相同的作用效果以及以下的作用效果。 
(6)在第二实施方式中，因为对置的薄壁部3213和薄壁部3313的长度不同，所以若开封安装了该卡扣带3B的包装袋1B，则在对置的基材膜24的不同的位置上被切断。 
从而，在再次开封再次密封了的带有卡扣带的包装袋1B时，易于抓住开口部的基材膜24。 
(7)此外，在薄壁部3213和第一凸状部3212以及第二凸状部3214中使用的树脂不同。从而，因为在这些部件之间易于进行层间剥离，所以能够将直线性付与切断线。此外，因为进行层间剥离，所以不会由撕裂的部位产生切断残渣，且能够提供卫生的制品。 
[第三实施方式] 
接着，参照图6说明第三实施方式。 
在第三实施方式中除了使用只在凹形部件33的带状基部331上设有薄壁部3313以及第二凸状部3314的卡扣带3C之外，其他构成与第一实施方式相同。 
在此，凸形部件32的带状基部321的长度优选调节为使开口部侧端面3212A的位置与凹形部件33的第一凸状部3312和薄壁部3313的边界面3312A的位置错开整。由此，因为对置的基材膜24被沿着切断线F～G高低不同地切断，所以在再次开封时，易于抓住基材膜24。另外，带有卡扣带的包装袋1C在第二凸状部3314和对置的基材膜24被熔接的状态下被密封。 
在这样的第三实施方式的构成中，能够获得与第一实施方式相同的作用效果以及以下的作用效果。 
(8)因为使用只在凹形部件33侧设有薄壁部3313的卡扣带3C，所以在开封时，沿着将薄壁部3313和第二凸状部3314以及薄壁部3313和第一凸状部3312之间的阶梯差与对置的第一凸状部3212连结的切断线F、G或者切断线E中的任意一条被切断。 
因为薄壁部3313只设置在一方，所以能够用更小的力开封，且能够实现易开封性。 
此外，因为第一凸状部3312以及第二凸状部3314形成为比薄壁部3313的厚度厚，所以即便切断线发生偏离，切断线也能够回到原先的切断位置。 
另外，本发明不仅仅限定于上述的实施方式，在能够达成本发明的目的以及效果的范围内的变形或改良当然也包含在本发明的内容中。此外，实施本发明时的具体的构造以及形状等，在能够达成本发明的目的以及效果的范围内也可以是其他构造或形状等。 
例如，在本实施方式中，在带状基部32、33的本体3211、3311的比咬合部31更靠近非开口部侧，设置四条肋34，但是并不限定肋34的数量。此外，如图7所示，也可以是没有设置肋34的构成。 
此外，为了压溃侧密封部21中的薄壁部而在点密封杆41上设置了凸部 43，但如图8所示，也可以在点密封杆42上形成与凸部43嵌合的凹部44。由此，能够可靠地更薄地更宽地形成薄壁部。 
此外，如图9所示，凸部43也可以是截面大致为圆弧状的形状。 
此外，如图10所示，也可以分别在点密封杆41和42的对置的位置上设置凸部43。 
此外，如图11所示，也可以在点密封杆41上形成沿着咬合部31的截面形状的形状的凹部45。由此，沿着咬合部31进行制袋，所以能够更稳定地正确地将薄壁部进行溶融扁平化。 
并且，在这些点密封中，借助凸部的抵接面的大小不同的点密封杆，可以经由两阶段、三阶段等多个阶段进行密封。由此，能够更稳定地进行扁平化。 
此外，在本实施方式中，在带状基部321以及331上分别形成一个作为厚壁的第一凸状部3212以及3312，但也可以设置两个以上。由此，即便在由于错误导致切断线向第一凸状部3212或者3312移动的情况中，也能够令切断线可靠地返回至薄壁部3213以及3313的剥离部分。 
进而，在上述实施方式中，熔接卡扣带3的包装体作为三面袋，但本发明并不限定于此，能够适用于由特开2003-155044所记载的制法获得的袋及高温包装袋。 
并且，在上述实施方式中，带状基部321以及331由单一的层形成，但也可以由多个层形成。特别是，若带状基部321以及331在熔接于袋体的侧的面上设置密封层，则能够将与袋体2的基材膜24的密封剂层241粘接性好的树脂作为密封层使用。从而，与用于袋体2的基材膜24的材料无关，能够制造粘接性优异的卡扣带。 
实施例 
如以下的实施例以及比较例那样，变化条件而作成卡扣带，分别进行撕裂阻力以及切断残渣的有无的评价。 
[实施例1] 
借助共挤压获得包括一对的凸形部件和凹形部件的图3所记载的卡扣带。使用的树脂、薄壁部的长度以及各部的厚度如下所示。 
卡扣带：聚丙烯(密度900kg/m3、MFR(Melt Flow Rate)7.0g/10min) 
薄壁部：聚丙烯(密度900kg/m3、MFR7.0g/10min) 
薄壁部的长度(凸形部件)：2mm 
薄壁部的长度(凹形部件)：5mm 
第一凸状部、第二凸状部的厚度：250μm 
薄壁部的厚度：100μm 
本体的厚度：150μm 
通过带有卡扣带的三面制袋机将该卡扣带和将双向延伸尼龙膜15μm和直链状低密度聚乙烯膜50μm进行了干燥层叠而成的膜进行制袋，获得带有易裂性卡扣带的包装袋。最后，在卡扣带的带部与薄壁部上形成V字形的切口。 
[实施例2] 
除了薄壁部的长度以外，其他与实施例1相同，获得图1及图2所记载的带有易裂性卡扣带的包装袋。在实施例2中使用的树脂以及薄壁部的长度如以下所示。 
卡扣带：聚丙烯(密度900kg/m3、MFR7.0g/10min) 
薄壁部：聚丙烯(密度900kg/m3、MFR7.0g/10min) 
薄壁部的长度(凸形部件)：5mm 
薄壁部的长度(凹形部件)：5mm 
第一凸状部、第二凸状部的厚度：250μm 
薄壁部的厚度：100μm 
本体的厚度：150μm 
[实施例3] 
除了卡扣带使用的树脂以外，其他与实施例2相同，获得带有易裂性卡扣带的包装袋。在实施例3中使用的树脂以及薄壁部的长度如以下所述。 
卡扣带：聚乙烯(密度926kg/m3、MFR1.5g/10min) 
薄壁部：聚丙烯(密度900kg/m3、MFR7.0g/10min) 
薄壁部的长度(凸形部件)：5mm 
薄壁部的长度(凹形部件)：5mm 
第一凸状部、第二凸状部的厚度：250μm 
薄壁部的厚度：100μm 
本体的厚度：150μm 
[实施例4] 
除了卡扣带使用的树脂之外，其他与实施例2相同，获得带有易裂性卡扣带的包装袋。实施例4的树脂以及薄壁部的长度如以下所述。 
卡扣带：低密度聚乙烯(密度926kg/m3、MFR1.5g/10min) 
薄壁部：聚丙烯(密度900kg/m3、MFR7.0g/10min) 
薄壁部的长度(凸形部件)：5mm 
薄壁部的长度(凹形部件)：5mm 
第一凸状部、第二凸状部的厚度：250μm 
薄壁部的厚度：100μm 
本体的厚度：150μm 
[实施例5] 
使用只在凹形部件上具有薄壁部和第二凸状部的卡扣带(本发明的第三实施方式)，借助共挤压获得包括一对的凸形部件和凹形部件的图4所记载的卡扣带。在实施例5中使用的树脂、薄壁部的长度以及各部的厚度如以下所述。 
卡扣带：低密度聚乙烯(密度926kg/m3、MFR1.5g/10min) 
薄壁部：聚丙烯(密度900kg/m3、MFR7.0g/10min) 
薄壁部的长度(凹形部件)：5mm 
第一凸状部、第二凸状部的厚度：250μm 
薄壁部的厚度：100μm 
本体的厚度：150μm 
通过带有卡扣带的三面制袋机将该卡扣带和将双向延伸尼龙膜15μm和直链状低密度聚乙烯膜50μm进行了干燥层叠而成的膜进行制袋，获得带有易裂性卡扣带的包装袋。最后，在卡扣带的带部与薄壁部上形成V字形的切口。 
[实施例6] 
除了薄壁部的长度之外，其他与实施例1相同，获得带有易裂性卡扣带的包装袋。在实施例6中使用的树脂以及薄壁部的长度如以下所述。 
卡扣带：聚丙烯(密度900kg/m3、MFR7.0g/10min) 
薄壁部：聚丙烯(密度900kg/m3、MFR7.0g/10min) 
薄壁部的长度(凸形部件)：2mm 
薄壁部的长度(凹形部件)：2mm 
第一凸状部、第二凸状部的厚度：250μm 
薄壁部的厚度：100μm 
本体的厚度：150μm 
[比较例1]  
通过带有卡扣带的三面制袋机将在带部设有易切断性树脂层的卡扣带(参照特开2004-244027的实施例1)和上述膜进行制袋而获得带有卡扣带的包装袋。另外，将袋侧部热封之后，在卡扣带的带部和易切断性树脂层的中间位置上形成有切口。 
[比较例2] 
用带有卡扣的三面制袋机将在卡扣带的带状基材上设置切断带的卡扣带(参照特开2004-276925的图12)和上述膜进行制袋而获得带有卡扣的袋。另外，在将袋侧部热封之后，在开封绳的两端部形成切口。 
[比较例3] 
除了薄壁部的长度之外其他与实施利1相同，获得带有易裂性卡扣带的包装袋。在比较例3中使用的树脂以及薄壁部的长度如以下所述。 
卡扣带：聚丙烯(密度900kg/m3、MFR7.0g/10min) 
薄壁部：聚丙烯(密度900kg/m3、MFR7.0g/10min) 
薄壁部的长度(凸形部件)：0.4mm 
薄壁部的长度(凹形部件)：0.4mm 
第一凸状部、第二凸状部的厚度：250μm 
薄壁部的厚度：100μm 
本体的厚度：150μm 
[比较例4] 
制造没有设置第一凸状部以及第二凸状部且除了薄壁部之外其他部分的厚度与本体的厚度相同的卡扣带，用三面制袋机进行制袋而获得带有卡扣带的包装袋。在比较例4中使用的树脂以及薄壁部的长度如以下所述。 
卡扣带：聚丙烯(密度900kg/m3、MFR7.0g/10min) 
薄壁部：聚丙烯(密度900kg/m3、MFR7.0g/10min) 
薄壁部的长度(凸形部件)：2mm 
薄壁部的长度(凹形部件)：2mm 
薄壁部的厚度：100μm 
本体的厚度：200μm 
从实施例1至实施例5以及比较例1，从袋侧部的切口撕裂表里的膜从而开封。 
比较例2，拉拽夹在切断带(薄壁部)端部的两个位置的切口之间的部分，切断切断带(薄壁部)和袋体的膜。 
[切断部分的阶梯差(易于抓住)的评价] 
A：有阶梯差(易于抓住) 
B：有时没有阶梯差(有时难以抓住) 
[撕裂阻力的评价] 
A：能够从切口部容易地切断 
B：能够以较小阻力从切口部切断 
C：在切断时有阻力 
[切断残渣的评价] 
A：在切断部没有切断残渣 
B：在切断部有切断残渣 
[表1] 
    切断部分的阶梯  差(易于抓住)   撕裂阻力   撕裂残渣   综合评价
 实施例1   A   A   A   A
 实施例2   B   A   A   A
 实施例3   B   B   A   A
 实施例4   B   B   A   A
 实施例5   B   B   A   A
 实施例6   B   A   A   A
 比较例1   B   B   B   C
 比较例2   -   C   A   C
 比较例3   -   C   -   C
 比较例4   -   C   -   C
从实施例1至实施例6，没有撕裂阻力，且能够容易地开封包装袋。此外，在开封时，没有产生切断残渣。 
比较例1，在撕裂阻力方面没有问题，但是在开封时产生切断残渣。比较例2，撕裂阻力大而难以打开。不产生切断残渣。比较例3，因为薄壁部的长度短所以撕裂阻力大而难以打开。比较例4，因为薄壁部的两侧部分薄所以与撕裂同时地被切断，不能进行直线地切断。 
工业实用性 
本发明，能够广泛地用于例如包装食品、医药、医疗品、杂货等的各种物品的带有卡扣带的包装袋。 

Claims (20)

1.一种易裂性卡扣带，由一对凸形部件以及凹形部件构成，凸形部件一体地形成有：被熔接在袋体上的带状基部、截面为大致箭头形状的头部、以及连结该带状基部和头部的连结部；凹形部件包括：熔接在袋体上的带状基部、与该带状基部连结而形成的截面为圆弧形状的第1钩部以及第2钩部，凸形部件的头部和凹形部件的第1钩部及第2钩部形成咬合部，所述易裂性卡扣带安装在包装袋的袋体内表面上，其特征在于，
上述带状基部中的至少一方具有：
设置有上述咬合部的本体、
设置在该本体的开口部侧且比上述本体厚度厚的第一凸状部、
设置在该第一凸状部的开口部侧且比上述第一凸状部以及上述本体厚度薄的薄壁部、
设置在该薄壁部的开口部侧且比上述薄壁部以及上述本体厚度厚的第二凸状部，
上述第一凸状部和上述第二凸状部的各自的与上述袋体内表面对置的对置面大致位于同一面，且在相对于这些对置面后退的位置上设有上述薄壁部而在上述薄壁部和上述第一凸状部以及上述第二凸状部之间形成阶梯差，
使上述薄壁部为撕裂引导片。
2.如权利要求1所述的易裂性卡扣带，其特征在于，
上述凸形部件以及上述凹形部件的各自的上述带状基部具有上述本体和上述第一凸状部和上述薄壁部和上述第二凸状部。
3.如权利要求2所述的易裂性卡扣带，其特征在于，
在设置在上述凸形部件和上述凹形部件上的上述薄壁部中，一方的薄壁部的长度和另一方的薄壁部的长度不同。
4.如权利要求1所述的易裂性卡扣带，其特征在于，
上述凸形部件或者上述凹形部件的任意一方的上述带状基部具有上述本体和上述第一凸状部和上述薄壁部和上述第二凸状部，
另一方的上述带状基部具有上述本体和上述第一凸状部。
5.如权利要求1所述的易裂性卡扣带，其特征在于，
在上述本体的比上述咬合部更靠近非开口部侧的位置上设置有与上述第一凸状部和上述第二凸状部的厚度具有相同的高度的一条或者多条的肋。
6.如权利要求1所述的易裂性卡扣带，其特征在于，
上述薄壁部的厚度为0.12mm以下，
上述第一凸状部以及上述第二凸状部的厚度为0.20mm以上1mm以下。
7.如权利要求1所述的易裂性卡扣带，其特征在于，
上述薄壁部的宽度为0.5mm以上5mm以下。
8.如权利要求1所述的易裂性卡扣带，其特征在于，
上述第一凸状部和上述第二凸状部和上述薄壁部由无规聚丙烯形成。
9.如权利要求1所述的易裂性卡扣带，其特征在于，
上述第一凸状部以及第二凸状部由同种的的树脂形成，
上述第一凸状部与上述薄壁部由不同种的树脂形成，上述第二凸状部与上述薄壁部由不同种的树脂形成，
上述第一凸状部与上述本体由不同种的树脂形成，上述第二凸状部与上述本体由不同种的树脂形成。
10.如权利要求1所述的易裂性卡扣带，其特征在于，
上述第一凸状部、上述第二凸状部及上述薄壁部由同种的树脂形成，
上述第一凸状部与上述本体由不同种的树脂形成，上述第二凸状部与上述本体由不同种的树脂形成，上述薄壁部与上述本体由不同种的树脂形成。
11.如权利要求1所述的易裂性卡扣带，其特征在于，
上述第一凸状部和上述第二凸状部和上述薄壁部和上述本体分别由不同种的树脂形成。
12.如权利要求1所述的易裂性卡扣带，其特征在于，
在上述第一凸状部、上述第二凸状部以及上述本体的向袋体内表面上安装的一侧的面上设有密封层。
13.如权利要求12所述的易裂性卡扣带，其特征在于，
形成上述密封层的树脂，熔点比形成上述第一凸状部、上述第二凸状部以及上述本体的树脂的熔点低，且含有以下的(A)以及(B)，
(A)密度为920kg/m3以下、MFR为5.0g/10分以下的金属茂类直链低密度聚乙烯为50质量％以上100质量％以下。
(B)由丙烯和碳数4～8的α-烯烃共聚物构成的组成物为0质量％以上50质量％以下。
14.一种易裂性卡扣带的制造方法，是制造权利要求1至13的任意一项所述的易裂性卡扣带的制造方法，其特征在于
借助共挤压而在一个工序中制造具有上述咬合部的上述本体、上述第一凸状部、第二凸状部和上述薄壁部。
15.一种带有易裂性卡扣带的包装袋，其特征在于，具有权利要求1至13的任意一项所述的易裂性卡扣带、和安装该易裂性卡扣带的袋体，
在上述袋体的内表面、与上述袋体的内表面对置的薄壁部的面、与该薄壁部的面交叉的上述第一凸状部的面以及上述第二凸状部的面之间形成有空隙。
16.如权利要求15所述的带有易裂性卡扣带的包装袋，其特征在于，
沿着该包装袋的与上述易裂性卡扣带交叉的方向形成有侧密封部，
上述侧密封部中的上述薄壁部的宽度、与比上述侧密封部更靠近内侧的上述薄壁部的宽度相比，上述侧密封部中的上述薄壁部的宽度更宽。
17.一种带有易裂性卡扣带的包装袋的制造装置，是制造如权利要求16所述的带有易裂性卡扣带的包装袋的制造装置，其特征在于，
具有用于压溃上述侧密封部中的上述薄壁部的一对的点密封杆，
上述一对的点密封杆的至少一方具有凸部，该凸部具有上述空隙的高度以上的高度。
18.如权利要求17所述的带有易裂性卡扣带的包装袋的制造装置，其特征在于，
上述一对的点密封杆具有上述凸部的抵接面的大小各自不同的多个种类。
19.一种带有易裂性卡扣带的包装袋的制造方法，是使用如权利要求17所述的带有易裂性卡扣带的包装袋的制造装置进行制造的制造方法，其特征在于，
在压溃上述薄壁部时，使上述凸部与上述薄壁部的位置对合，从上述薄壁部的中心向外侧进行溶融扁平化。
20.一种带有易裂性卡扣带的包装袋的制造方法，是使用如权利要求18所述的易裂性卡扣带的包装袋的制造装置的制造方法，其特征在于，
上述一对的点密封杆，具有上述凸部的抵接面的大小各自不同的多个种类，
且从上述凸部的抵接面的大小小的点密封杆依次地密封。
CN2007800352916A 2006-09-22 2007-06-27 易裂性卡扣带及其制造方法、带有易裂性卡扣带的包装袋及其制造装置以及制造方法 Active CN101522538B (zh)

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CA2664068A1 (en) 2008-03-27
CN101522538A (zh) 2009-09-02
EP2103541A1 (en) 2009-09-23
US8540428B2 (en) 2013-09-24
TWI399326B (zh) 2013-06-21
JP4898817B2 (ja) 2012-03-21
US20100074562A1 (en) 2010-03-25
KR101344985B1 (ko) 2013-12-24
WO2008035494A1 (fr) 2008-03-27

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