KR20190118334A - Co-extruded antibiotics multi-layer film - Google Patents

Co-extruded antibiotics multi-layer film Download PDF

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KR20190118334A
KR20190118334A KR1020180041545A KR20180041545A KR20190118334A KR 20190118334 A KR20190118334 A KR 20190118334A KR 1020180041545 A KR1020180041545 A KR 1020180041545A KR 20180041545 A KR20180041545 A KR 20180041545A KR 20190118334 A KR20190118334 A KR 20190118334A
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layer
extruded
food packaging
multilayer film
inner layer
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KR1020180041545A
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Korean (ko)
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이재준
주동윤
윤태홍
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주식회사 영일테크
주동윤
윤태홍
이재준
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Priority to KR1020180041545A priority Critical patent/KR20190118334A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
    • B65D81/28—Applications of food preservatives, fungicides, pesticides or animal repellants
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Wrappers (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

A co-extruded antibiotic multi-layer film for packaging the food comprises: (i) an inner layer (1a) consisting of a metallocene linear low density polyethylene resin; (ii) an intermediate layer (1b) consisting of a polyethylene resin; and (iii) an outer layer (1c) consisting of a polyamide resin. In the inner layer (1a), 1-10 wt% of oyster peel powder is contained. The co-extruded antibiotic multi-layer film for packaging the food (1) has excellent gas and moisture barrier properties, transparency and flexibility, has excellent antibiotic qualities and is harmless to the human body. In addition, the production cost of the film is low.

Description

식품포장용 공압출 항균 다층필름{Co-extruded antibiotics multi-layer film}Co-extruded antibiotics multi-layer film for food packaging

본 발명은 식품포장용 공압출 항균 다층필름에 관한 것으로서, 구체적으로는 식품포장용 필름에 요구되는 뛰어난 가스차단성, 수분차단성, 투명도 및 유연성 등을 구비하면서 항균성이 더욱 향상되고, 인체에 무해하며 생산원가가 저렴한 식품포장용 공압출 항균 다층필름에 관한 것이다.The present invention relates to a co-extruded antimicrobial multilayer film for food packaging, and more particularly, having an excellent gas barrier property, water barrier property, transparency and flexibility required for a food packaging film, further improves antimicrobial properties, harmless to human body, and production cost. The present invention relates to a co-extruded antibacterial multilayer film for cheap food packaging.

식품포장용 필름의 경우에는 우수한 가스차단성, 수분차단성, 투명도 및 유연성과 함께 뛰어난 항균성도 요구되고 있다.In the case of food packaging films, excellent anti-microbial properties are required along with excellent gas barrier properties, water barrier properties, transparency and flexibility.

종래 식품포장용 필름으로는 상기와 같은 요구 물성들을 모두 충족시켜주기 위해서, 서로 다른 수지로 이루어진 2개 이상의 필름들을 라미네이팅시켜 제조한 다층필름이 사용되고 있으나, 상기 종래방법은 필름 제조 공정과 별개로 별도로 라미네이팅 공정을 추가로 실시해야 하기 때문에 제조공정이 복잡해 지는 문제가 있었다.Conventional food packaging films are used in order to meet all of the above required properties, a multi-layer film produced by laminating two or more films made of different resins are used, but the conventional method is separately laminated separately from the film manufacturing process There was a problem that the manufacturing process is complicated because the process must be carried out additionally.

한편, 대한민국 공개특허공보 제10-2010-0135253호에서는 (ⅰ) 메탈로센 저밀도 폴리에틸렌으로 이루어진 내층; (ⅱ) 폴리올레핀과 변성물로 이루어진 중간층; 및 (ⅲ) 폴리아미드 수지로 이루어진 외층;으로 이루어진 식품포장용 폴리아미드계 다층튜브를 게재하고 있으나, 상기 식품포장용 폴리아미드계 다층튜브는 이를 구성하는 내층내에 항균성분이 함유되지 않아 항균성이 크게 저하되는 문제가 있었다.On the other hand, Korean Patent Laid-Open No. 10-2010-0135253 discloses (i) an inner layer made of metallocene low density polyethylene; (Ii) an intermediate layer consisting of a polyolefin and a modified product; And (iii) an outer layer made of a polyamide resin. However, the polyamide-based multilayer tube for food packaging has a problem that the antibacterial component is not contained in the inner layer constituting the food-based polyamide-based multilayer tube. There was.

한편, 대한민국 등록특허 공보 제10-1547448호에서는 천연광석인 백금 나노입자를 함유하는 식품포장용 항균수지 필름을 게재하고 있으나, 상기 백금 나노입자가 고가인 관계로 생산비용이 증가하는 문제와 백금 나노입자가 인체에 유해한 문제가 있었다.Meanwhile, Korean Patent Publication No. 10-1547448 discloses an antimicrobial resin film for food packaging containing platinum nanoparticles as natural ores, but the production cost increases due to the platinum nanoparticles being expensive and platinum nanoparticles. There was a harmful problem to the human body.

한편, 대한민국 공개특허 공보 제10-2017-005949호에서는 크롬바졸과 세틸피리디늄 클로라이드로 이루어진 유무기 하이브리드 물질을 함유하는 항균 플라스틱 마스터 배치를 게재하고 있으나, 상기 하이브리드 유무기 하이브리드 물질 역시 고가인 관계로 생산비용이 증가하는 문제와 상기 유무기 하이브리드 물질이 인체에 유해한 문제가 있었다.Meanwhile, Korean Patent Publication No. 10-2017-005949 discloses an antimicrobial plastic masterbatch containing an organic-inorganic hybrid material composed of chrombazole and cetylpyridinium chloride, but the hybrid organic-inorganic hybrid material is also expensive. There is a problem that the production cost increases and the organic-inorganic hybrid material is harmful to the human body.

본 발명의 과제는 식품포장용 필름에 요구되고 있는 가스차단성, 수분차단성, 투명성 및 유연성이 우수함과 동시에 항균성이 뛰어나며, 특히 인체에 무해하고 생산비용이 저렴한 식품포장용 공압출 항균 다층필름을 제공하는 것이다.An object of the present invention is to provide a co-extruded antimicrobial multilayer film for food packaging that is excellent in anti-microbial properties and is excellent in gas barrier properties, water barrier properties, transparency and flexibility required for food packaging films, and is particularly harmless to humans. .

이와 같은 과제를 해결하기 위해서, 본 발명에서는 (ⅰ) 메탈로센(Metallocene) 선형 저밀도 폴리에틸렌 수지로 이루어진 내층(1a), (ⅱ) 폴리에틸렌 수지로 이루어진 중간층(1b) 및 (ⅲ) 폴리아미드 수지로 이루어진 외층(1c)들로 구성되는 식품포장용 공압출 다층필름을 제조할 때, 상기 내층(1a) 내에 굴(Oyster) 껍질을 분쇄하여 제조한 분말(이하 "굴껍질 분말" 이라고 한다)을 1~2중량% 함유시켜 항균성이 뛰어난 식품포장용 공압출 항균 다층필름을 낮은 생산원가로 제조한다.In order to solve such a problem, in the present invention, (i) an inner layer (1a) made of metallocene linear low density polyethylene resin, (ii) an intermediate layer (1b) made of polyethylene resin, and (iii) a polyamide resin When manufacturing a co-extruded multilayer film for food packaging consisting of the outer layer (1c) consisting of, the powder produced by grinding the oyster (Oyster) shell in the inner layer (1a) (hereinafter referred to as "oyster shell powder") 1 ~ It contains 2% by weight to produce a coextruded antimicrobial multilayer film for food packaging having excellent antibacterial properties at low production cost.

본 발명에 따른 식품포장용 공압출 항균 다층필름은 가스차단성, 수분차단성, 유연성 및 투명성이 우수함과 동시에 항균성이 뛰어나고, 특히 인체에 무해하면서 생산원가가 저렴하다.The coextruded antimicrobial multilayer film for food packaging according to the present invention has excellent gas barrier properties, moisture barrier properties, flexibility and transparency, and has excellent antibacterial properties, and is particularly harmless to the human body and inexpensive to produce.

도 1은 본 발명에 따른 식품포장용 공압출 다층필름(1)의 단면 모식도.
도 2는 본 발명의 제조공정 일례의 개략도.1 is a schematic cross-sectional view of a co-extruded multilayer film (1) for food packaging according to the present invention.
2 is a schematic view of one example of a manufacturing process of the present invention.

이하, 첨부한 도면 등을 참조하여 본 발명을 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

본 발명에 따른 식품포장용 공압출 다층필름은 도 1에 도시된 바와 같이 (ⅰ) 메탈로센(Metallocene) 선형 저밀도 폴리에틸렌 수지로 이루어진 내층(1a), (ⅱ) 폴리에틸렌 수지로 이루어진 중간층(1b) 및 (ⅲ) 폴리아미드 수지로 이루어진 외층(1c)들로 구성되며, 상기 내층(1a)에는 굴껍질 분말이 1~10중량% 함유되어 있는 것을 특징으로 한다.The co-extruded multilayer film for food packaging according to the present invention is (i) an inner layer (1a) made of metallocene linear low density polyethylene resin (1a), (ii) an intermediate layer (1b) made of polyethylene resin, and (Iii) An outer layer (1c) made of a polyamide resin, characterized in that the inner layer (1a) contains 1 to 10% by weight of oyster shell powder.

상기 중간층(1b)에는 접착제 성분으로 무수물이 그라프트된 폴리에틸렌(Anhydride grafted polyethylene)이 추가로 더 함유되어 있는 것이 바람직하다.Preferably, the intermediate layer 1b further contains anhydride grafted polyethylene as an adhesive.

상기 굴껍질 분말은 굴(Oyster) 껍질을 분쇄한 분말로서 셀레늄(Se), 칼슘(Ca) 및 아연(Zn) 성분을 포함하고 있어서 항균성이 뛰어나며, 인체에 무해하면서도 생산원가도 저렴하다.The oyster shell powder is a powder obtained by crushing the oyster (Oyster) shell and contains selenium (Se), calcium (Ca) and zinc (Zn) components, which have excellent antibacterial properties, are harmless to the human body, and are low in production cost.

상기 외층(1c)은 폴리아미드 수지로 구성되어 있기 때문에 투명성이 특히 우수하다.Since the outer layer 1c is made of a polyamide resin, transparency is particularly excellent.

내층(1a)에 천연 항균제 역할을 하는 굴껍질 분말이 함유되어 있어서 항균성을 지속적으로 유지할 수 있다.Oyster shell powder that acts as a natural antimicrobial agent is contained in the inner layer (1a) can maintain the antibacterial continuously.

상기 내층(1a)의 두께는 50~60㎛이고, 중간층(1b)의 두께는 5~15㎛이고, 외층(1c)의 두께는 10~20㎛인 것이 바람직하다.It is preferable that the thickness of the said inner layer 1a is 50-60 micrometers, the thickness of the intermediate | middle layer 1b is 5-15 micrometers, and the thickness of the outer layer 1c is 10-20 micrometers.

상기 내층(1a)내 굴껍질 분말의 함량은 1~10중량%이며, 1중량% 미만인 경우에는 항균성이 저하되고, 10중량%를 초과하는 경우에는 내층(1a) 내에서 굴껍질 분말이 고르게 분산되기 어렵게 된다.The content of the oyster shell powder in the inner layer (1a) is 1 to 10% by weight, when less than 1% by weight of the antimicrobial activity is lowered, if it exceeds 10% by weight oyster shell powder evenly dispersed in the inner layer (1a) It becomes difficult to be.

본 발명에 따른 식품포장용 공압출 항균 다층필름을 제조하는 방법 일례를 살펴보면, (ⅰ) 굴껍질 분말 및 메탈로센(Metallocene) 선형 저밀도 폴리에틸렌 수지를 제1익스트루더(40)에 투입, 용융시켜 내층(1a) 제조용 용융물을 제조하는 공정; (ⅱ) 폴리에틸렌 수지와 접착제 성분을 제2익스트루더(40')에 투입, 용융시켜 중간층(1b) 제조용 용융물을 제조하는 공정; (ⅲ) 폴리아미드 수지를 제3익스트루더(40'')에 투입, 용융시켜 외층(1c) 제조용 용융물을 제조하는 공정; (ⅳ) 상기 내층(1a) 제조용 용융물, 중간층(1b) 제조용 용융물 및 외층(1c) 제조용 용융물들을 함께 하나의 공압출용 다이(Die : 11)를 통해 내층(1a), 중간층(1b) 및 외층(1c)으로 이루어진 3층 구조의 공압출 다층필름(1) 형태로 공압출 하는 공정; 및 (ⅴ) 상기 다이(11)를 통해 하부 방향으로 공압출된 공압출 다층필름(1)을 물로 냉각(수냉)시킨 후 다수개의 압착로울러(11)들을 통과시키면서 무연신 상태로 압착하는 공정;을 차례로 거쳐 본 발명의 식품포장용 공압출 항균 다층필름을 제조한다.Looking at one example of a method for producing a co-extruded antimicrobial multilayer film for food packaging according to the present invention, (i) oyster shell powder and metallocene (Metallocene) linear low density polyethylene resin is added to the first extruder 40 Preparing a melt for producing the inner layer 1a; (Ii) a step of adding a polyethylene resin and an adhesive component to the second extruder 40 'and melting to produce a melt for producing the intermediate layer 1b; (Iii) injecting and melting the polyamide resin into the third extruder 40 '' to produce a melt for producing the outer layer 1c; (Iii) the inner layer 1a, the intermediate layer 1b and the outer layer together with the melt for producing the inner layer 1a, the melt for producing the intermediate layer 1b, and the melt for producing the outer layer 1c together through one coextrusion die (Die 11). Co-extrusion in the form of a three-layer coextrusion multilayer film (1) consisting of (1c); And (iii) cooling (water-cooling) the coextruded multilayer film (1) coextruded downward through the die (11) with water and then pressing the non-stretched state while passing through a plurality of compression rollers (11); In order to prepare a co-extruded antimicrobial multilayer film for food packaging of the present invention.

이하, 실시예를 통하여 본 발명을 보다 구체적으로 살펴본다.Hereinafter, the present invention will be described in more detail with reference to Examples.

실시예EXAMPLE 1 One

도 1에 도시된 바와 같이 굴껍질 분말 및 메탈로센(Metallocene) 선형 저밀도 폴리에틸렌 수지를 제1익스트루더(40)에 투입, 용융시켜 내층(1a) 제조용 용융물을 제조하였다.As shown in FIG. 1, the oyster shell powder and the metallocene linear low density polyethylene resin were added to the first extruder 40 and melted to prepare a melt for preparing the inner layer 1a.

이때, 내층(1a) 제조용 용융물내 굴껍질 분말의 함량을 3중량%로 하였다.At this time, the content of the oyster shell powder in the melt for preparing the inner layer 1a was 3% by weight.

한편, 저밀도 폴리에틸렌 수지와 무수물이 그라프트된 폴리에틸렌인 접착제 성분을 제2익스트루더(40')에 투입, 용융시켜 중간층(1b) 제조용 용융물을 제조하였다.On the other hand, the low density polyethylene resin and the adhesive component which is the grafted polyethylene anhydride were put into the 2nd extruder 40 ', and it melt | dissolved, and the melt for manufacturing the intermediate | middle layer 1b was manufactured.

이때, 접착제 성분의 함량은 2중량%로 조절하였다.At this time, the content of the adhesive component was adjusted to 2% by weight.

한편, 폴리아미드 수지를 제3익스트루더(40'')에 투입, 용융시켜 외층(1c) 제조용 용융물을 제조하였다.On the other hand, the polyamide resin was poured into the third extruder 40 '' and melted to prepare a melt for producing the outer layer 1c.

다음으로는, 상기 내층(1a) 제조용 용융물, 중간층(1b) 제조용 용융물 및 외층(1c) 제조용 용융물들을 함께 하나의 공압출용 다이(Die : 11)를 통해 내층(1a), 중간층(1b) 및 외층(1c)으로 이루어진 3층 구조의 공압출 다층필름(1) 형태로 공압출한 다음, 상기 다이(11)를 통해 하부 방향으로 공압출된 공압출 다층필름(1)을 물로 냉각(수냉)시킨 후 다수개의 압착로울러(11)들을 통과시키면서 무연신 상태로 압착하여 식품포장용 공압출 항균 다층필름을 제조하였다.Next, the inner layer 1a, the intermediate layer 1b, the melt for producing the intermediate layer 1b, and the melt for producing the outer layer 1c are combined together through a single coextrusion die (Die 11). Co-extruded in the form of a three-layer coextruded multilayer film (1) consisting of an outer layer (1c), and then the coextruded multilayer film (1) coextruded downward through the die (11) with water (water cooling) After passing through a plurality of pressing rollers (11) while pressing in an unstretched state to prepare a co-extruded antimicrobial multilayer film for food packaging.

제조된 공압출 항균 다층필름은 투명도가 85%, 인장강도가 55Mpa, 표면고유저항이 109Ω·㎝, 항균성(세균제거율)이 99.9%이였으며, 이로부터 투명성 및 항균성이 크게 향상되었음을 확인하였다.The prepared co-extruded antimicrobial multilayer film had a transparency of 85%, a tensile strength of 55Mpa, a surface intrinsic resistance of 10 9 Ω · cm, and an antimicrobial (bacterial removal rate) of 99.9%. .

1 : 식품포장용 항균 다층필름
1a : 식품포장용 항균 다층필름의 내층
1b : 식품포장용 항균 다층필름의 중간층
1c : 식품포장용 항균 다층필름의 외층
10, 10', 10'' : 익스트루더 11 : 공압출 다이(Die)
12 : 에어블로우 13 : 수냉조
14 : 압착 로울러 15 : 권취로울러1: antimicrobial multilayer film for food packaging
1a: inner layer of antimicrobial multilayer film for food packaging
1b: middle layer of antimicrobial multilayer film for food packaging
1c: outer layer of antimicrobial multilayer film for food packaging
10, 10 ', 10'': Extruder 11: Coextrusion Die
12 air blow 13: water cooling tank
14: crimping roller 15: winding roller

Claims (2)

(ⅰ) 메탈로센(Metallocene) 선형 저밀도 폴리에틸렌 수지로 이루어진 내층(1a),
(ⅱ) 폴리에틸렌 수지로 이루어진 중간층(1b) 및
(ⅲ) 폴리아미드 수지로 이루어진 외층(1c)들로 구성되며, 상기 내층(1a)에는 굴껍질 분말이 1~10중량% 함유되어 있는 것을 특징으로 하는 식품포장용 공압출 항균 다층필름.(Iii) an inner layer (1a) made of metallocene linear low density polyethylene resin,
(Ii) an intermediate layer 1b made of polyethylene resin and
(Iii) An outer layer (1c) made of a polyamide resin, the inner layer (1a) co-extruded antimicrobial multilayer film for food packaging, characterized in that containing 1 to 10% by weight of oyster shell powder. 제1항에 있어서, 상기 중간층(1b)에는 무수물이 그라프트된 폴리에틸렌(Anhydride grafted polyethylene)이 추가로 더 함유되어 있는 것을 특징으로 하는 식품포장용 공압출 항균 다층필름.2. The coextruded antimicrobial multilayer film for food packaging according to claim 1, wherein the intermediate layer (1b) further contains anhydride grafted polyethylene.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102126161B1 (en) * 2019-12-16 2020-06-24 고영태 Multi-layer film for packaging food and process for preparing the same
KR102291759B1 (en) * 2020-06-24 2021-08-19 이경민 Manufacture method of tubetype heat shiringkable film for antibiotic covering using antibiotic copper and tubetype heat shiringkable film thereby

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102126161B1 (en) * 2019-12-16 2020-06-24 고영태 Multi-layer film for packaging food and process for preparing the same
KR102291759B1 (en) * 2020-06-24 2021-08-19 이경민 Manufacture method of tubetype heat shiringkable film for antibiotic covering using antibiotic copper and tubetype heat shiringkable film thereby
WO2021261769A1 (en) * 2020-06-24 2021-12-30 이경민 Method for manufacturing tubular heat-shrinkable film for antimicrobial covering using antimicrobial copper, and tubular film manufactured thereby

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