KR20140033271A - Cap material for container made by polyethylene telephthalate and resin composition for making the cap material - Google Patents
Cap material for container made by polyethylene telephthalate and resin composition for making the cap material Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
- C08L67/03—Polyesters derived from dicarboxylic acids and dihydroxy compounds the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B11/00—Making preforms
- B29B11/06—Making preforms by moulding the material
- B29B11/12—Compression moulding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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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
- B65D43/00—Lids or covers for rigid or semi-rigid containers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
Description
본 발명은 폴리에틸렌테레프탈레이트(PET)제 용기용 뚜껑재와 그 뚜껑재 제조용 수지조성물 및 그 뚜껑재를 포함하는 포장용기에 관한 것으로, 보다 자세하게는 비결정화 폴리에틸렌테레프탈레이트 제품에 대한 열접착이 가능하면서도 박리용이성을 구비한 폴리에틸렌테레프탈레이트제 용기용 뚜껑재와 그 원료 수지조성물 및 그 뚜껑재를 구비한 포장용기에 관한 것이다.The present invention relates to a packaging material including a lid material for a container made of polyethylene terephthalate (PET), a resin composition for producing the lid material, and a lid material thereof, and more particularly, thermal bonding to an amorphous polyethylene terephthalate product is possible. A lid material for a polyethylene terephthalate container container having easy peelability, a raw material resin composition thereof, and a packaging container provided with the lid material.
각종 음식물이나 의약품의 포장용기로서, 폴리프로필렌(PP)를 비롯한 각종 플라스틱제의 가장자리부를 구비한 트레이 형상 또는 컵 형상으로 성형된 용기가 일반적으로 사용되고 있다. 이러한 용기들은 내용물의 신선도 유지 및 이물질 혼입방지 등의 기능이 요구되기 때문에 내용물을 수용한 후에 용기를 밀봉할 필요가 있는바, 이물질 혼입차단 특성 및 밀봉처리의 용이성 등의 관점으로부터 용기와는 별개로 이루어진 시트필름 등으로 된 뚜껑재로 용기의 개구부를 막고, 용기의 가장자리부에서 뚜껑재와의 열접착으로 밀봉(열접착)하는 방법이 널리 사용되고 있다.As a packaging container for various foods and medicines, a container molded into a tray shape or a cup shape having edge portions made of various plastics including polypropylene (PP) is generally used. Since these containers require functions such as maintaining freshness of contents and preventing foreign matters from being mixed, it is necessary to seal the containers after receiving the contents, so that the containers are separated from the viewpoints of the characteristics of blocking foreign substances and the ease of sealing. A method of closing the opening of the container with a lid member made of a sheet film or the like, and sealing (heat bonding) by thermal bonding with the lid member at the edge of the container is widely used.
음식품이나 의약품 등의 포장은, 포장 후의 보존 및 운송 시에 높은 기밀성이 요구되는 한편 최종적으로는 개봉되어서 수요자에게 이용되기 때문에 개봉용이성도 함께 요구된다.Packaging of foods and beverages and medicines requires high airtightness during preservation and transportation after packaging, and is also required to open easily since it is finally opened and used by the consumer.
특히 플라스틱제의 용기 본체와 뚜껑재로 밀봉된 포장용기에 있어서는, 통상적으로 용기 본체와 뚜껑재가 밀봉 부위에서 쉽게 박리되는(밀봉된 뚜껑재를 손으로 용이하게 떼어낼 수가 있는) 박리 용이성(easy peel property)을 구비한 상태일 것이 요구되고 있다. 이에 따라, 플라스틱제 용기와 그 뚜껑재와의 사이에는 열접착성과 함께 박리 용이성이 구비되어 있는 것이 바람직하다.Especially in a packaging container sealed with a plastic container body and a lid material, easy peeling (the peelable lid material can be easily peeled off by hand) is usually easy at the sealing body and the lid material. property) is required. Therefore, it is preferable that peelability is provided between a plastic container and its lid | cover material with heat adhesiveness.
용기 본체와 뚜껑재가 열접착이 가능하면서도 박리 용이성이 구비된 포장용기로 구성하는 방법으로는, 아래의 특허문헌1 및 특허문헌2에 기재된 바와 같이, 열접착 및 용이 박리성을 실현시키는 주체로서 용기 본체와 뚜껑재의 재질과는 별도 소재로 이루어진 씰란트(밀봉재)를 뚜껑재의 용기 본체에 접하는 측에 적층한 씰란트층으로 형성하는 방법이 일반적이다. As a method of constructing a packaging container with easy peelability while the container body and the lid member are heat-sealed, as described in Patent Documents 1 and 2 below, the container serves as a main agent for achieving thermal adhesion and easy peelability. The method of forming the sealant (sealing material) which consists of a material separate from the material of a main body and a lid material by the sealant layer laminated | stacked on the side which contact | connects the container main body of a lid material is common.
한편 현재에 이르기까지 포장용기로서 흔히 사용되어 온 폴리프로필렌 등의 폴리올레핀은 내용물의 향기 성분을 흡착해 버림으로써 내용물의 맛과 향기의 변화가 일어나고 또한 폴리올레핀 특유의 냄새가 나는바, 이러한 향(flavor) 특성의 문제는 내용물이 음식물인 경우에는 특히 중요하게 된다.On the other hand, polyolefins, such as polypropylene, which have been commonly used as packaging containers to date, adsorb the scent components of the contents, thereby changing the taste and aroma of the contents and smelling unique to the polyolefin. The problem of properties becomes particularly important when the contents are food.
이에 따라 향 특성이 우수한 소재로 비결정성 폴리에틸렌테레프탈레이트(A-PET)가 주목을 받고 있는바, 향 특성에 더해서 투명도가 높고 재활용성에서도 이점을 지니고 있음에 따라 현재에는 식품 포장용기로서 A-PET제 용기가 널리 이용되어 오고 있으며, A-PET제 용기에 대해서도 박리 용이성을 갖는 뚜껑재를 구비하도록 하는 것이 요구되고 있다.As a result, amorphous polyethylene terephthalate (A-PET) is attracting attention as a material with excellent fragrance properties. In addition to fragrance properties, A-PET is now used as a food packaging container due to its high transparency and recyclability. Containers have been widely used, and it is required to provide a lid member having easy peelability even for an A-PET container.
그러나 플라스틱제 포장용기의 뚜껑재로 일반적으로 사용되어 온 종래의 박리 용이성을 구비한 뚜껑재는, A-PET에 대하여 박리 용이성을 구비한 채 열접착으로 밀봉하는 것이 곤란하고, A-PET에 대해 어느 정도 박리 용이성을 실현할 수 있는 뚜껑재가 있더라도 현재 알려진 뚜껑재는 그 어느 것도 상기 특허문헌1 내지 2에 기재된 바와 같이 "다층 구조", 즉 용기의 개구부를 막는 주체인 뚜껑재의 기재(基材)에 대하여 A-PET에 대한 열접착성 및 박리 용이성을 갖추도록 하는 주체로서 각종 씰란트를 적층하는 것으로 A-PET제 용기의 융착성이 실현되고 있는 것이다.However, the lid material with the conventional peelability which is generally used as the lid | cover material of the plastic packaging container is difficult to seal with heat adhesion, with the peelability with respect to A-PET, Even if there is a lid member which can realize the degree of easy peeling, any of the currently known lid members is "multilayered structure" as described in Patent Documents 1 to 2, that is, the base material of the lid member which is the main body blocking the opening of the container. The adhesion of the A-PET container is realized by laminating various sealants as a main agent to provide thermal adhesiveness and ease of peeling to the PET.
이에 따라, 뚜껑재의 제조공정에서는 공정 자체가 복잡화 및 제조비용의 상승이 초래되고, 또한 포장공정에 있어서는 뚜껑재이 필름 시트의 표면과 이면이 잘못되지 않도록 하여야 하는 취급상의 불편함이 따름에 기인하여, 특수한 시트재를 필요로 하지 않으면서도 A-PET의 열접착성 및 박리 용이성을 갖춘 단층 구조의 덮개재의 개발이 요망되고 있는 실정이다.As a result, in the manufacturing process of the lid member, the process itself is complicated, and the manufacturing cost is increased, and in the packaging process, the lid member is inconvenient in handling so that the front and back surfaces of the film sheet are not mistaken. There is a demand for the development of a cover material having a single layer structure having heat adhesiveness and easy peelability of A-PET without requiring a special sheet material.
한편, 특허문헌3에는 폴리에틸렌프탈레이트 수지 60∼80wt%, 상용화제로서 에틸렌-글리시딜(메타) 아크릴레이트 공중합체 또는 에틸렌-글리시딜(메타) 아크릴레이트 저급알킬(메타) 아크릴레이트 3원 공중합체 1∼10wt%, 저밀도 폴리에틸렌 수지 10∼35wt%로 이루어진 폴리에틸렌테레프탈레이트 수지조성물이 200℃ 이하의 온도에서 열접착이 가능한 필름으로서 적용가능하다는 것과 저밀도 폴리에틸렌 수지의 함유량에 의해서 열접착의 박리강도가 조절가능하여 박리 용이성을 부여할 수 있다고 밝히고 있다.On the other hand, Patent Literature 3 discloses 60 to 80 wt% of polyethylene phthalate resin and an ethylene-glycidyl (meth) acrylate copolymer or an ethylene-glycidyl (meth) acrylate lower alkyl (meth) acrylate tertiary air as a compatibilizer. The peel strength of the thermal bonding is determined by the polyethylene terephthalate resin composition composed of 1 to 10 wt% of copolymer and 10 to 35 wt% of low density polyethylene resin as a film that can be thermally bonded at a temperature of 200 ° C. or lower, and the content of the low density polyethylene resin. It is revealed that it can be adjusted to provide easy peeling.
그런데 상기 특허문헌3 상에서 기재되어 있는 폴리에틸렌프탈레이트 수지조성물에 따른 열접착성 및 박리 용이성은 상기 폴리에틸렌프탈레이트 수지조성물로 제조된 필름시트끼리 열접착이 이루어지는 것으로서 그 필름시트들 사이의 열접착의 박리용이성이 있을 뿐으로 다른 소재에 대한 열접착성 및 박리용이성에 대하여는 언급되고 있지 않다.By the way, the thermal adhesiveness and the ease of peeling according to the polyethylene phthalate resin composition described in Patent Document 3 are heat-bonded between the film sheets made of the polyethylene phthalate resin composition, so that the ease of peeling the thermal adhesion between the film sheets is easy. There is no mention of thermal adhesion and peelability to other materials.
본 발명은 이와 같은 A-PET제 용기의 열접착용 뚜껑재의 과제를 해결하기 위한 것으로서, A-PET 제품에 대한 열접착이 가능함과 아울러 박리용이성이 구비되어 특수한 씰란트를 필요로 하지 않는 단층 구조의 뚜껑재를 제공하는데 목적을 두고 있다. The present invention is to solve the problem of the heat-sealing lid material of the container made of A-PET, it is possible to heat adhesion to A-PET products as well as the ease of peeling single layer structure that does not require a special sealant The purpose is to provide a lid.
상기 목적을 달성하기 위한 본 발명의 A-PET용 뚜껑재 제조용 수지조성물은, 폴리에틸렌테레프탈레이트 수지와, 에틸렌 단위를 주 반복단위로 하는 중합체인 폴리에틸렌계 수지와, 에폭시기 내지 글리시딜기를 함유하는 상용화제가 이축압축기에 의해 용융혼련되어 얻어지는 수지조성물로서, 상기 폴리에틸렌계 수지는 메타로센 촉매에 의한 에틸렌과 헥산-1과의 공중합 직쇄상 저밀도 폴리에틸렌과 액상중합법에 의한 에틸렌과 옥텐-1과의 공중합 직쇄상 저밀도 폴리에틸렌과의 등량혼합물이고, 상기 상용화제는 글리시딜메타크릴레이트와 에틸렌의 이원공중합체이며, 상기 폴리에틸렌테레프탈레이트 수지의 혼합량이 50∼85 질량%, 상기 폴리에틸렌계 수지의 혼합량이 12∼47 질량%, 상기 상용화제의 혼합량이 3∼5 질량%인 것을 특징으로 한다.The resin composition for manufacturing A-PET lid materials of the present invention for achieving the above object is a commercialization containing a polyethylene terephthalate resin, a polyethylene-based resin which is a polymer having an ethylene unit as a main repeating unit, and an epoxy group to a glycidyl group. A resin composition obtained by melt-kneading by a biaxial compressor, wherein the polyethylene resin is a copolymer of ethylene and hexane-1 using a metalocene catalyst and a copolymer of ethylene and octene-1 by linear low density polyethylene and liquid polymerization. Is an equivalent mixture of linear low density polyethylene, the compatibilizer is a binary copolymer of glycidyl methacrylate and ethylene, the mixing amount of the polyethylene terephthalate resin is 50 to 85 mass%, and the mixing amount of the polyethylene resin is 12 -47 mass% and the mixing amount of the said compatibilizer are 3-5 mass%, It is characterized by the above-mentioned.
본 발명의 A-PET용 뚜껑재 제조용 수지조성물로 이루어진 팰릿을 원료 팰릿으로 해서, 인플레이션법 또는 티다이(T die) 성형법으로 제조된 필름시트는, 특수한 씨일재를 필요로 하지 않고 A-PET에 대한 열접착성 및 박리용이성을 구비하게 된다. The film sheet manufactured by the inflation method or the T-die molding method using the pallet which consists of the resin composition for A-PET lid material manufacture of this invention as a raw material pallet, does not require a special seal material, It has heat adhesiveness and ease of peeling.
따라서, 본 발명의 A-PET용 뚜껑재 제조용 수지조성물을 원료로 하여 인플레이션법이나 티다이 성형법으로 제조되는 필름시트는 씰란트층을 형성하지 않고도 단층구조이면서도 A-PET제 용기에 용이하게 열접착이 가능함과 아울러 박리용이성을 갖는 뚜껑재로의 사용이 가능하게 된다.Therefore, the film sheet manufactured by the inflation method or the Ti-die molding method using the resin composition for A-PET lid material manufacturing of the present invention as a raw material has a single layer structure without forming a sealant layer and can be easily thermally bonded to an A-PET container. In addition, it is possible to use as a lid material having ease of peeling.
또한, 본 발명의 A-PET용 뚜껑재에 의해서 실현되는 열접착은 이른바 계면박리 타입의 박리용이성을 지니고 있고, 개봉시에도 용기를 전혀 손상시킴이 없이 박리가 가능하며, 뚜껑재가 단층구조임에 따라 씰란트층을 구비한 종래의 뚜껑재에서와 같이 씰란트의 일부가 용기측에 남는 일이 없으며, 개봉 후에도 용기의 박리면은 깨끗한 평활면이 유지된다고 하는 장점이 있다.In addition, the thermal adhesion realized by the A-PET capping material of the present invention has so-called interfacial peeling ease of peeling, and can be peeled off without damaging the container at all, and the capping material has a single layer structure. As in the conventional lid member provided with the sealant layer, a part of the sealant does not remain on the container side, and even after opening, the peeling surface of the container has an advantage that a clean smooth surface is maintained.
즉, 본 발명은 상기 폴리에틸렌테레프탈레이트 수지로서 회수(재생) 폴리에틸렌테레프탈레이트 수지를 이용하는 것이 가능하고, 본 발명은 사용했던 PET의 재이용 수단의 하나로서도 유용하다.That is, the present invention can use a recovered (regenerated) polyethylene terephthalate resin as the polyethylene terephthalate resin, and the present invention is also useful as one of the reuse means of PET used.
또한, 본 발명의 A-PET 씨일용 뚜껑재는 뚜껑으로서 요구되는 얇은 두께에서도 충분한 강도를 구비함과 아울러 가스 차단성도 우수하기 때문에 본 발명의 A-PET용 뚜껑재와 A-PET제 용기와의 조합으로 되는 포장용기는 음식물 및 의약품 등의 포장용기로서 적합하게 이용될 수 있다.In addition, since the lid material for A-PET seal of the present invention has sufficient strength and excellent gas barrier property even at the thin thickness required as the lid, the combination of the lid material for A-PET of the present invention and a container made of A-PET of the present invention The packaging container may be suitably used as a packaging container for food and medicine.
이하, 본 발명을 실시하기 위한 형태를 실시예를 이용하여 상세하게 설명한다. 이하의 실시예는 본 발명의 기술사상을 구체화하기 위한 A-PET용 뚜껑재의 일예를 보인 것으로서, 본 발명을 이 실시예로 한정하는 것을 의도하지는 않으며, 본 발명은 특허청구범위에 기재된 기술사상을 벗어남이 없이 다양하게 변경을 행한 것들에도 균일하게 적용하여 얻어진 것이다.EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated in detail using an Example. The following examples are examples of A-PET capping material for embodying the technical idea of the present invention, and are not intended to limit the present invention to this embodiment, the present invention is not intended to limit the technical spirit described in the claims It is obtained by applying uniformly to the various changes made without departing.
［실시예］[Example]
회수 폴리에틸렌테레프탈레이트 수지 플레이크(flake) 70중량부와, 밀도 0.925g/㎤, MRF 1.9g/10min의 메타로센 촉매에 의한 에틸렌과 헥산-1과의 공중합 LLDPE 13중량부와, 상용화제로서의 글리시딜메타크릴레이트와 에틸렌의 이원공중합체(일본 알케마사제 로타다-GMA AX8840) 4질량%중량부를 이축압출기를 이용하여 270℃에서 용융혼련 후 펠릿화하고, 인플레이션 필름성형용 수지조성물을 얻었다. 혼련기로는 KTX 80형 이축기(축직경 59mm L/D 37.5 ; 주식회사 고베제작소제)를 이용하였다.70 parts by weight of the recovered polyethylene terephthalate resin flake, 13 parts by weight of ethylene and hexane-1 copolymerized with ethylene and a hexane-1 by a methylenelocene catalyst having a density of 0.925 g / cm 3 and an MRF of 1.9 g / 10 min, and a glycene as a compatibilizer 4 mass% by weight of cyl methacrylate and ethylene binary copolymer (Rotada-GMA AX8840 manufactured by Alkema Co., Ltd.) was pelletized after melt kneading at 270 ° C. using a twin screw extruder to obtain a resin composition for inflation film molding. . As a kneading machine, a KTX 80 type twin screw machine (shaft diameter 59mm L / D 37.5; manufactured by Kobe Co., Ltd.) was used.
이어서, 상기 수지조성물을 건조시킨 후에 인플레이션 성형기(다이 200mm Φ)를 이용하여 수지온도 270℃로 가열용융하고 인발속도 20m/min으로 인플레이션 성형하여 실시예로서의 A-PET용 뚜껑재로서의 인플레이션 필름(두께 50㎛)를 얻었다. Subsequently, after drying the resin composition, it was heated and melted at a resin temperature of 270 ° C. using an inflation molding machine (die 200 mm Φ) and inflation-molded at a drawing speed of 20 m / min to form an inflation film as a lid material for an A-PET as an example (thickness 50). Μm).
이와 같이 해서 얻어진 실시예의 필름 특성은 아래와 같다.The film characteristic of the Example thus obtained is as follows.
(㎛)thickness
(탆)
(Mpa)The tensile strength
(Mpa)
(%)Elongation at Break
(%)
(J)Impact strength
(J)
(N/cm)Adhesive strength
(N / cm)
(cc/㎡·24·atm)Oxygen permeability
(cc / ㎡, 24 atm)
［비교예］[Comparative Example]
복합 씰란트 필름의 소재로서 범용되고 있는 폴리에틸렌테레프탈레이트를 주원료로 한 이축연신 필름{일본 동양방(東洋紡)사 제품 E5100}을 비교예로 사용하였다.As a comparative example, the biaxially stretched film (E5100 by Toyobang Co., Ltd., Japan) which used the general purpose polyethylene terephthalate as a raw material of a composite sealant film was used.
［A-PET에 대한 열접착성 및 박리용이성 평가］[Evaluation of Heat Adhesive and Peelability for A-PET]
두께 280㎛의 A-PET 씨트와, 실시예 내지 비교예에 관련된 인플레이션 필름을 각각 아래의 조건으로 열접착하였다.A-PET sheets having a thickness of 280 µm and inflation films according to Examples and Comparative Examples were thermally bonded under the following conditions, respectively.
접착온도: 140℃, 120℃, Adhesion Temperature: 140 ℃, 120 ℃
접착폭: 15mmBond Width: 15mm
접착시간: 4초Adhesion time: 4 seconds
이어서, JIS Z 1707에 의거해서 열접착의 접착강도를 측정하였다. 결과를 표1에서 보여주고 있다. 오히려 비교예에 있어서는 어떠한 온도에서도 열접착 조작을 행하여도 접착되지 않았기 때문에 접착강도를 측정할 수가 없었다.Next, the adhesive strength of thermal bonding was measured according to JIS Z 1707. The results are shown in Table 1. On the contrary, in the comparative example, the bonding strength could not be measured because no bonding was carried out even when the thermal bonding operation was performed at any temperature.
표2에 나타나 있는 바와 같이, 실시예에 따른 A-PET용 뚜껑재로서의 인플레이션 필름은 특수한 씰란트를 사용하지 않고서도 충분한 접착강도로 A-PET에 대한 열접착이 가능하고, 또한 접착온도 등을 조정함으로써 접착강도를 제어하는 것이 가능하다는 것을 알 수 있다.As shown in Table 2, the inflation film as a capping material for A-PET according to the embodiment can be thermally bonded to A-PET with sufficient adhesive strength without using a special sealant, and also adjusts the adhesion temperature and the like. It can be seen that it is possible to control the adhesive strength by doing so.
박리용이성 뚜껑재에서 요구되는 일반적인 접착강도는 5∼20 N/15mm 정도인 바, 본 발명의 뚜껑재에 따라 열접착된 A-PET제 용기는 열접착을 할 때에 접착온도를 변경함으로써 각종 용도에 대응되도록 한 박리용이성을 구비한 포장용기로 구성하는 것이 가능하다.The general adhesive strength required for the peelable lid material is about 5 to 20 N / 15mm. A-PET containers heat-bonded according to the lid material of the present invention can be used for various applications by changing the adhesion temperature when performing thermal bonding. It is possible to constitute a packaging container with easy peelability so as to correspond.
또한, 표1에 나타나 있는 바와 같이, 실시예에 따른 A-PET용 뚜껑재로서의 인플레이션 필름은, 뚜껑재에서 요구되는 강도를 구비함과 아울러 가스기밀성이 우수하여 본 발명의 뚜껑재에 의해 열접착된 A-PET제 용기는 음식물 및 의약품용 포장용기로서 적합하게 사용될 수 있다.In addition, as shown in Table 1, the inflation film as the capping material for A-PET according to the embodiment has the strength required for the capping material and is excellent in gastightness and is heat-sealed by the capping material of the present invention. The prepared A-PET container can be suitably used as a packaging container for food and medicine.
Claims (5)
상기 폴리에틸렌계 수지는 메타로센 촉매에 의한 에틸렌과 헥산-1과의 공중합 직쇄상 저밀도 폴리에틸렌과 액상중합법에 의한 에틸렌과 옥텐-1과의 공중합 직쇄상 저밀도 폴리에틸렌과의 등량혼합물이고,
상기 상용화제는 글리시딜메타크릴레이트와 에틸렌의 이원공중합체이며,
상기 폴리에틸렌테레프탈레이트 수지의 혼합량이 50∼85 질량%, 상기 폴리에틸렌계 수지의 혼합량이 12∼47 질량%, 상기 상용화제의 혼합량이 3∼5 질량%인 것을 특징으로 하는 비정질화 폴리에틸렌테레프탈레이트제 용기용 뚜껑재 제조용 수지조성물.As a resin composition obtained by melt-kneading a polyethylene terephthalate resin, a polyethylene-based resin which is a polymer having ethylene units as a main repeating unit, and a compatibilizer containing an epoxy group to a glycidyl group, by a twin screw compressor,
The polyethylene resin is an isotropic mixture of copolymerized linear low density polyethylene of ethylene and hexane-1 by a metalocene catalyst and copolymerized linear low density polyethylene of ethylene and octene-1 by liquid polymerization,
The compatibilizer is a binary copolymer of glycidyl methacrylate and ethylene,
Amorphous polyethylene terephthalate container, characterized in that the mixing amount of the polyethylene terephthalate resin is 50 to 85% by mass, the mixing amount of the polyethylene resin is 12 to 47% by mass, and the mixing amount of the compatibilizer is 3 to 5% by mass. Resin composition for manufacturing lid material
인플레이션법이나 티다이 성형법에 의해 제조되는 필름시트로서,
상기 폴리에틸렌계 수지는 메타로센 촉매에 의한 에틸렌과 헥산-1과의 공중합 직쇄상 저밀도 폴리에틸렌과 액상중합법에 의한 에틸렌과 옥텐-1과의 공중합 직쇄상 저밀도 폴리에틸렌과의 등량혼합물이고,
상기 상용화제는 글리시딜메타크릴레이트와 에틸렌의 이원공중합체이며,
상기 수지조성물은 상기 폴리에틸렌테레프탈레이트 수지를 50∼85 질량%, 상기 폴리에틸렌계 수지를 12∼47 질량%, 상기 상용화제를 3∼5 질량%의 비율로 용융혼련시키는 것을 특징으로 하는 비정질화 폴리에틸렌테레프탈레이트제 용기용 뚜껑재.Using a polyethylene terephthalate resin, a polyethylene-based resin which is a polymer having ethylene units as a main repeating unit, and a compatibilizer containing an epoxy group to a glycidyl group, a resin composition obtained by melt kneading by a biaxial compressor as a pallet raw material,
As a film sheet manufactured by the inflation method or the Ti-die molding method,
The polyethylene resin is an isotropic mixture of copolymerized linear low density polyethylene of ethylene and hexane-1 by a metalocene catalyst and copolymerized linear low density polyethylene of ethylene and octene-1 by liquid polymerization,
The compatibilizer is a binary copolymer of glycidyl methacrylate and ethylene,
The resin composition is melt-kneaded at a ratio of 50 to 85% by mass of the polyethylene terephthalate resin, 12 to 47% by mass of the polyethylene-based resin and 3 to 5% by mass of the compatibilizer. Cover material for phthalate container.
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