KR20140077631A - Film for packing food - Google Patents

Film for packing food Download PDF

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Publication number
KR20140077631A
KR20140077631A KR1020120146644A KR20120146644A KR20140077631A KR 20140077631 A KR20140077631 A KR 20140077631A KR 1020120146644 A KR1020120146644 A KR 1020120146644A KR 20120146644 A KR20120146644 A KR 20120146644A KR 20140077631 A KR20140077631 A KR 20140077631A
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South Korea
Prior art keywords
food
layer
film
present
nylon
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KR1020120146644A
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Korean (ko)
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KR101557331B1 (en
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최정환
오제하
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주식회사 이앤코리아
재단법인 한국탄소융합기술원
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Priority to KR1020120146644A priority Critical patent/KR101557331B1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered 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
    • B32B27/08Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/18Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/32Layered products comprising a layer of synthetic resin comprising polyolefins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/34Layered products comprising a layer of synthetic resin comprising polyamides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/40Layered products comprising a layer of synthetic resin comprising polyurethanes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02Physical, chemical or physicochemical properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/714Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145Rot proof, resistant to bacteria, mildew, mould, fungi
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/716Degradable
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/724Permeability to gases, adsorption
    • B32B2307/7242Non-permeable
    • B32B2307/7244Oxygen barrier
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/732Dimensional properties
    • B32B2307/734Dimensional stability
    • B32B2307/736Shrinkable
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00Containers; Receptacles
    • B32B2439/70Food packaging

Abstract

The present invention relates to a food packing film and, more specifically, to a multi-layered food packing film which can maintain the food freshness. The food packing film according to the present invention comprises an outer skin layer preventing oxygen-permeability; and an inner skin layer which is contacted with one side of the outer skin layer, has an elastic force, and includes a polyolefin elastomer composition. According to embodiments of the present invention, the freshness of food is maintained for a long time and the marketability of the food can be enhanced. Moreover, the film is contracted according to the shape of food and adhered to the food, thereby removing a space between food and film where air is flowed in; and food deterioration and decay are prevented, thereby enabling an extension of the retention period of food.

Description

식품 포장용 필름 {FILM FOR PACKING FOOD}Film for food packaging {FILM FOR PACKING FOOD}

본 발명은 식품 포장용 필름에 관한 것으로서, 보다 구체적으로는 식품 신선도를 유지할 수 있는 다층 구조의 식품 포장용 필름에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film for food packaging, and more specifically to a film for food packaging having a multi-layer structure capable of maintaining food freshness.

식품의 유통과정에 있어서 식품의 신선도와 유지하고 변질을 방지하기 위해 식품을 포장 용기, 포장용 필름 등과 같은 포장재로 밀봉한다. In food distribution process, food is sealed with packaging materials such as packaging containers and packaging films to prevent freshness and maintenance and deterioration of food.

식품 포장재가 적합하지 않은 경우에는 식품이 유통 중에 수분, 산소, 빛 등의 영향으로 변질되어 각종 미생물이 성장하고, 지방과 주요 비타민이 산화되어 영양이 떨어지며, 식품이 섭취할 수 없는 상태로 부패할 수 있다. 특히 소시지, 햄과 같은 육가공 식품, 각종 육류와 같이 변질되기 쉽거나 신선도가 중요하기 때문에 적절한 포장재를 선택하는 것이 중요하다. If the food packaging material is not suitable, the food will be degraded due to moisture, oxygen, light, etc. during the distribution and various microorganisms will grow, the fat and major vitamins will be oxidized and the nutrition will be deteriorated. . Especially, it is important to select appropriate packaging materials because it is easy to change such as meat products such as sausages, ham, and various kinds of meat, or freshness is important.

부패 방지와 신선도 유지를 위하여 식품을 포장용 필름으로 감싸 밀봉한 후, 포장용 필름 내부에 인입된 공기를 제거하여 포장용 필름이 수축하도록 한다. 식품 포장에 사용되는 필름은 일반적으로 다층구조로 형성되는데, 식품과 맞닿는 내측의 소재는 열을 가하면 수축하는 성질을 갖는다. In order to prevent corruption and maintain freshness, food is wrapped in a packaging film and then air drawn into the packaging film is removed to shrink the packaging film. The film used for food packaging is generally formed in a multi-layered structure. The inner material contacting the food has a property of shrinking when heat is applied.

종래에 사용되는 이러한 열 수축 성질을 갖는 소재는 아세테이트를 10 ~ 20 % 포함한다. 이러한 아세테이트를 포함하는 소재는 주변 환경에 따라 강한 식초냄새가 발산할 수 있기 때문에, 식품의 식감을 떨어뜨릴 수 있다. 또한 아세테이트에 의해 식품이 산화되어 변질되는 경우도 발생할 수 있다. Conventionally used materials having such heat shrinkable properties include 10 to 20% of acetate. Such a material containing acetate may degrade the texture of the food because strong vinegar odor may be emitted depending on the surrounding environment. It is also possible that the food may be oxidized and altered by the acetate.

또한 종래의 포장용 필름은 다층 구조를 안정적으로 유지하기 위해 층간마다 접착층이 개재되고, 포장된 식품에 산소 투과를 완전하게 차단하기 위해서 4층 이상의 다층 구조로 형성되는데, 이러한 경우 포장용 필름의 두께가 두꺼워져 탄력이 떨어지기 때문에 포장용 필름이 식품의 모양을 따라 수축하기 어려울 수 있다. 그리고 인체에 무해한 접착제를 사용하여야 하기 때문에, 필름의 제조 단가가 상승하는 문제점이 발생하였다. Further, in order to stably maintain the multi-layer structure, the conventional packaging film has an adhesive layer interposed between the layers and is formed into a multilayer structure of four or more layers in order to completely block the oxygen permeation to the packaged food. In this case, The packaging film may be difficult to shrink along with the shape of the food because the elasticity is lowered. In addition, since a harmless adhesive should be used for the human body, a manufacturing cost of the film is increased.

본 발명의 일측면은 식품의 신선도를 오래 유지할 수 있는 식품 포장용 필름을 제공하는 것이다.One aspect of the present invention is to provide a food packaging film which can maintain freshness of food for a long time.

또한 본 발명의 다른 일측면은 식품의 모양에 따라 수축하여 필름을 밀착시킴으로써 식품과 필름 사이에 공기가 인입될 공간을 제거할 수 있는 식품 포장용 필름을 제공하는 것이다.According to another aspect of the present invention, there is provided a food packaging film capable of removing a space through which air enters between a food and a film by shrinking the film according to the shape of the food to closely contact the film.

본 발명에 따른 식품 포장용 필름은 산소 투과를 방지하는 외피층; 및 외피층 일면에 접합되고, 탄성력을 가지며, 폴리올레핀 엘라스토머 조성물을 포함하는 내피층;을 포함한다. The film for food packaging according to the present invention comprises an outer layer for preventing oxygen permeation; And an endothelial layer joined to one surface of the sheath layer and having an elastic force and including a polyolefin elastomer composition.

본 발명에 따른 식품 포장용 필름에 있어서, 외피층은 나일론계 조성물을 포함하는 것이 바람직하다. In the film for food packaging according to the present invention, the shell layer preferably comprises a nylon-based composition.

본 발명에 따른 식품 포장용 필름에 있어서, 나일론계 조성물은 헥사메틸렌다이아민과 세바스산으로부터 합성한 나일론 610을 포함하는 것이 바람직하다.In the film for food packaging according to the present invention, the nylon-based composition preferably contains nylon 610 synthesized from hexamethylenediamine and sebacic acid.

본 발명에 따른 식품 포장용 필름에 있어서, 폴리올레핀 엘라스토머 조성물은 100 ℃ 이하의 온도에서 열수축 가능한 것이 바람직하다.In the film for food packaging according to the present invention, the polyolefin elastomer composition is preferably heat shrinkable at a temperature of 100 ° C or lower.

본 발명에 따른 식품 포장용 필름에 있어서, 외피층과 내피층 중간에 개재되며, 우레탄계 조성물을 포함하는 중간층;을 더 포함하는 것이 바람직하다.In the film for food packaging according to the present invention, it is preferable that the film further comprises an intermediate layer interposed between the outer shell layer and the inner shell layer and comprising a urethane-based composition.

본 발명의 실시예들에 따르면 식품의 신선도를 오래 유지하여 식품의 상품성을 높일 수 있다.According to the embodiments of the present invention, the freshness of the food can be maintained for a long time and the commerciality of the food can be enhanced.

식품의 모양에 따라 수축하여 필름을 밀착시킴으로써 식품과 필름 사이에 공기가 인입될 공간을 제거하고, 식품의 변질과 부패를 방지하여 식품의 보관 기간을 연장할 수 있다.By shrinking according to the shape of the food and bringing the film into close contact, it is possible to remove the space in which air enters between the food and the film, and to prevent deterioration and corruption of the food, thereby extending the storage period of the food.

또한 본 발명의 실시예들에 따르면 수분이나 산소의 투과를 필요에 따라 조절하여 식품의 종류에 따라 적절한 신선도를 유지하도록 할 수 있는 필름을 제공할 수 있다.In addition, according to the embodiments of the present invention, it is possible to provide a film capable of controlling the permeation of moisture or oxygen as needed to maintain an appropriate freshness according to the kind of food.

이하에서는 본 발명에 따른 식품 포장용 필름에 관하여 구체적으로 설명한다. 그러나 본 발명은 이하에서 개시되는 실시예에 한정되는 것이 아니라 서로 다른 다양한 형태로 구현될 것이며, 단지 본 실시예들은 본 발명의 개시가 완전하도록 하며, 통상의 지식을 가진 자에게 발명의 범주를 완전하게 알려주기 위해 제공되는 것이다. Hereinafter, the film for food packaging according to the present invention will be described in detail. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know.

층, 막, 영역, 판 등의 부분이 다른 부분 “상에” 있다고 할 때, 이는 다른 부분 “바로 상에” 있는 경우뿐 아니라 그 중간에 또 다른 부분이 있는 경우도 포함한다. 또한, 명세서 전체에서, 어떤 부분이 어떤 구성요소를 “포함” 한다고 할 때, 이는 특별히 반대되는 기재가 없는 한 다른 구성요소를 제외하는 것이 아니라 다른 구성요소를 더 포함할 수 있는 것을 의미한다. It will be understood that when a layer, film, region, plate, or the like is referred to as being "on" another portion, it includes not only the other portion "directly on" but also the other portion in between. Also, throughout the specification, when an element is referred to as " including " an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise.

본 발명의 제1 실시예에 식품 포장용 필름은 다층구조로 구성되며, 외피층 및 내피층을 포함한다.In the first embodiment of the present invention, the film for food packaging has a multi-layer structure and includes an outer shell layer and an inner skin layer.

외피층은 산소 투과를 차단하기 위한 층으로서, 산소를 차단하는 수지로 구성된다. 외피층을 구성하는 산소 차단용 수지로는 나일론, PET(polyethylene terephthalate), EVOH(ethylene vinyl alcohol), PVCH(polyvinylcyclohexane), PVDC(Polyvinylidene chloride) 등이 사용될 수 있으나 이에 한정되는 것은 아니며, 산소의 투과를 차단하는 성질을 갖는 다양한 물질 중에서 선택될 수 있다.The outer layer is a layer for blocking oxygen permeation and is made of a resin that blocks oxygen. As the oxygen barrier resin constituting the shell layer, nylon, polyethylene terephthalate (EVOH), ethylene vinyl alcohol (EVOH), polyvinylcyclohexane (PVCH), polyvinylidene chloride (PVDC), and the like may be used. Or < RTI ID = 0.0 > blocking. ≪ / RTI >

본 실시예에서의 외피층은 나일론계 조성물을 포함하여 구성될 수 있다. 나일론계 조성물은 투명성이 좋으며, 인장강도, 인열강도, 내마모성 등 기계적 강도가 우수하며, 산소 차단성이 우수하다.The shell layer in this embodiment can be composed of a nylon-based composition. The nylon-based composition has good transparency, excellent mechanical strength such as tensile strength, tear strength, abrasion resistance, and excellent oxygen barrier property.

외피층을 구성하는 나일론계 조성물은 ε-카프롤락탐을 합성하고 이를 고리열림중합시켜 제조한 나일론 6, 헥사메틸렌다이아민(hexamethylenediamine)과 아디프산(adipic acid)의 아미드 결합으로부터 합성한 나일론 66, 헥사메틸렌다이아민과 세바스산(sebacic acid)으로부터 합성한 나일론 610또는 이들의 2 이상 조합한 혼합물 등 다양한 나일론계 조성물을 포함할 수 있다. The nylon-based composition constituting the shell layer is composed of nylon 6, which is prepared by synthesizing? -Caprolactam and ring-opening polymerization thereof, nylon 66 synthesized from amide bond of hexamethylenediamine and adipic acid, Nylon 610 synthesized from hexamethylenediamine and sebacic acid, or a combination of two or more thereof.

바람직하게는 헥사메틸렌다이아민과 세바스산으로부터 합성한 나일론 610을 나일론계 조성물로서 사용할 수 있다. 나일론 610은 녹는점이 210 ℃여서 추후 설명할 우레탄계 조성물 중간층과 녹는점이 가장 유사하기 때문에 가공이 용이하다. 또한 나일론 610은 산소 차단성이 우수하며, 탄성율이 높다.Preferably, nylon 610 synthesized from hexamethylenediamine and sebacic acid can be used as a nylon-based composition. Nylon 610 has a melting point of 210 ° C and is easily processed because it has the melting point most similar to the intermediate layer of the urethane-based composition to be described later. Nylon 610 also has excellent oxygen barrier properties and high elasticity.

외피층이 이러한 나일론계 조성물을 포함하는 경우, 산소는 외피층을 투과하지 못하나, 수분은 삼투압 현상에 의해 투과할 수 있다. 이로 인해 식품 포장용 필름 내의 식품이 발효 식품인 경우, 식품에서 발생하는 수분을 배출하고 산소의 출입은 차단함으로써 식품이 부패하지 않고 잘 숙성할 수 있도록 한다.When the shell layer comprises such a nylon-based composition, oxygen can not penetrate the shell layer, but moisture can permeate through the osmotic phenomenon. If the food in the film for food packaging is a fermented food, the moisture is released from the food and the oxygen is prevented from entering or leaving the food, so that the food can be aged without being decomposed.

내피층은 식품을 감싸 밀봉하기 위한 층으로서, 탄성력을 갖는다. 또한 내피층은 열을 가하면 수축하는 열수축 성질을 갖는다. 내피층이 탄성력이 높고 열 수축성이 강할수록 식품 포장용 필름이 식품에 밀착할 수 있기 때문에, 식품과 식품 포장용 필름 사이에 공간을 제거하여 공기가 인입되지 않도록 할 수 있다. 이로 인해 식품의 신선도 및 상품성을 오랫동안 유지하고 보관기관을 연장시킬 수 있다. 내피층은 접착층을 이용하여 외피층과 떨어지지 않도록 부착한다.The endothelial layer is a layer for wrapping and sealing food, and has an elastic force. The endothelial layer also has a heat shrinkage property that shrinks when heat is applied. The higher the elasticity of the endothelial layer and the greater the heat shrinkage, the more the film for food packaging can adhere to the food, thus eliminating the space between food and food packaging film to prevent air from entering. This allows the freshness and merchantability of the food to be maintained for a long time and the storage facility extended. The endothelial layer is adhered to the outer layer using an adhesive layer so as not to fall off.

내피층은 폴리올레핀 엘라스토머 조성물을 포함한다. 폴리올레핀 엘라스토머 조성물의 경우, 추가성분 조정과 제조방법에 따라 100 ℃ 이하의 온도에서도 열수축이 가능하도록 형성될 수 있다. 바람직하게는 80 ℃ 이하의 온도에서 열수축할 수 있다. 또한 폴리올레핀 엘라스토머 조성물은 아세테이트를 포함한 종래의 내피층과 달리 냄새가 나지 않아 식품에 밀착되더라도 식품의 식감을 떨어뜨리지 않는다. 열수축 성질도 우수하기 때문에 식품이 공기와 접촉하지 않게 밀봉할 수 있다. The endothelial layer comprises a polyolefin elastomer composition. In the case of the polyolefin elastomer composition, it may be formed so as to be capable of thermal shrinkage even at a temperature of 100 DEG C or lower depending on the additional component adjustment and the manufacturing method. Preferably at a temperature of 80 DEG C or less. In addition, the polyolefin elastomer composition does not smell unlike the conventional endothelial layer containing acetate, and does not deteriorate the texture of the food even if it adheres to the food. Because of its excellent heat shrinkage properties, the food can be sealed without coming into contact with air.

본 발명의 제2 실시예에 식품 포장용 필름은 다층구조로 구성되며, 외피층, 중간층 및 내피층을 포함한다.In the second embodiment of the present invention, the film for food packaging has a multi-layer structure, and includes an outer shell layer, an intermediate layer and an endothelial layer.

제2 실시예에 따른 식품 포장용 필름은 중간층이 추가된 것을 제외하고 전술한 제1 실시예의 식품 포장용 필름과 구성으로 이루어진다. 제1 실시예와 중복되는 구성에 대해서는 설명을 생략한다. The film for food packaging according to the second embodiment is composed of the film for food packaging of the first embodiment except for the addition of the intermediate layer. Explanations of configurations overlapping with those of the first embodiment are omitted.

중간층은 식품 포장용 필름에 신축성과 인장 강도를 부여하기 위한 층으로서, 외피층과 내피층 중간에 개재된다. 중간층은 우레탄계 조성물을 포함한다. 우레탄계 조성물을 포함하는 중간층은 녹는점으로 인해 210 ℃ 이상의 온도에서 가공할 수 없는데, 나일론계 조성물을 포함하는 외피층의 경우 녹는 점이 이와 유사한 범위이므로, 가공이 용이하다. 또한 녹는 점보다 20 ~ 30 ℃ 낮은 온도 범위에서 외피층과 중간층을 가공하기 때문에, 외피층과 중간층은 층간에 별도의 접착층 없이도 단단하게 접착될 수 있다.The intermediate layer is a layer for imparting stretchability and tensile strength to the film for food packaging, and is interposed between the outer skin layer and the inner skin layer. The intermediate layer comprises a urethane-based composition. The intermediate layer containing the urethane-based composition can not be processed at a temperature of 210 캜 or higher due to its melting point. In the case of the outer layer including the nylon-based composition, the melting point is similar to the range, so that the intermediate layer is easy to process. Also, since the outer layer and the intermediate layer are processed at a temperature range of 20 to 30 ° C lower than the melting point, the outer layer and the intermediate layer can be firmly adhered to each other without a separate adhesive layer.

우레탄계 조성물을 포함한는 중간층은 분해성 및 항균성을 갖는 폴리 우레탄 수지 조성물로 형성될 수 있다. 폴리 우레탄 수지 조성물로는 카르복실산과 디올을 축중합시켜 제조한 폴리올 중량에 대하여 디큐밀퍼옥사이드(Dicumyl peroxide) 10 ~ 20 중량%, 나트륨 분말 4 ~ 6중량%, 은 나노 입자 20 ~ 30중량%, 아연 분말 7 ~ 11 중량%, 제올라이트 분말 8 ~ 12 중량%, 탄산칼슘 0.1 ~ 2 중량% 및 메틸렌 비스 스테아르아미드(methylene bis stearamide) 또는 에틸렌 비스 스테아르아미드(ethylene bis stearamide) 9 ~ 11 중량%를 혼합하여 반응시켜 제조한 복합 분해제를 폴리우레탄 중량에 대하여 5 ~ 10 중량% 첨가한 폴리우레탄 수지 조성물로 형성될 수 있다.The intermediate layer containing the urethane-based composition may be formed of a polyurethane resin composition having decomposability and antibacterial properties. As the polyurethane resin composition, 10 to 20% by weight of dicumyl peroxide, 4 to 6% by weight of sodium powder, 20 to 30% by weight of silver nanoparticles, and 10 to 20% by weight of polyol are prepared by polycondensation of a carboxylic acid and a diol, 7 to 11% by weight of zinc powder, 8 to 12% by weight of zeolite powder, 0.1 to 2% by weight of calcium carbonate and 9 to 11% by weight of methylene bis stearamide or ethylene bis stearamide And 5 to 10% by weight based on the weight of the polyurethane.

본 명세서에서 "조성물"으로서의 표기는 본 발명의 식품 포장용 필름의 층이 적어도 부분적으로 그와 같은 물질을 포함한다는 것을 나타내며, 특히 그와 같은 물질로만 구성된 층을 포괄할 수 있다.As used herein, the expression "composition" indicates that the layer of the film for food packaging of the present invention includes at least partially such materials, and may encompass a layer consisting solely of such materials.

또한 본 발명의 실시예들에 따른 식품 포장용 필름은 2층 구조 또는 3층 구조로 구성되나, 이에 한정되는 것은 아니며, 층간에 식품 포장용 필름에 다른 특성을 부여하는 다양한 층이 개재될 수 있다.
Further, the food packaging film according to the embodiments of the present invention may have a two-layer structure or a three-layer structure, but the present invention is not limited thereto, and various layers that impart different characteristics to the food packaging film may be interposed between the layers.

이하, 실험예를 통해 본 발명의 효과를 설명한다.Hereinafter, the effects of the present invention will be described with reference to experimental examples.

[실험 1][Experiment 1]

6 시간 이상 건조된 나일론계 조성물을 압출기로 압출하여 15 μm 두께의 외피층을 제조한다. 그리고 폴리우레탄계 조성물을 압출기로 압출하여 15 μm 두께의 중간층을 제조한다. 마찬가지의 방법으로 폴리올레핀 엘라스토머 조성물을 압출기로 압출하여 30 μm 두께의 내피층을 제조한다. A nylon-based composition dried for 6 hours or more is extruded by an extruder to prepare a 15 mu m-thick shell layer. Then, the polyurethane-based composition is extruded by an extruder to prepare an intermediate layer having a thickness of 15 μm. In the same manner, the polyolefin elastomer composition is extruded by an extruder to prepare an endothelial layer having a thickness of 30 μm.

앞서 설명한 바와 같이 나일론계 조성물로 구성된 외피층과 폴리우레탄계 조성물로 구성된 중간층은 유사한 가공온도에서 제조하여 접착층 없이 접착시킬 수 있다. 내피층은 타이레진을 접착층으로 하여 중간층을 사이에 두고 외피층과 접착한다. 이때 타이레진 접착층의 두께는 10 μm이다.As described above, the outer layer made of the nylon-based composition and the intermediate layer made of the polyurethane-based composition can be manufactured at similar processing temperatures and can be bonded without an adhesive layer. The endothelial layer is made of a tie resin as an adhesive layer and adhered to the outer skin layer with the intermediate layer sandwiched therebetween. The thickness of the tie resin adhesive layer is 10 μm.

실험 1의 식품 포장용 필름은 전체 두께가 70 μm로 형성된다. The film for food packaging of Experiment 1 has a total thickness of 70 μm.

[실험 2][Experiment 2]

6 시간 이상 건조된 EVOH을 압출기로 압출하여 15 μm 두께의 외피층을 제조한다. 마찬가지의 방법으로 폴리올레핀 엘라스토머 조성물을 압출기로 압출하여 45 μm 두께의 내피층을 제조한다. The EVOH, which has been dried for 6 hours or more, is extruded by an extruder to produce a 15 μm thick envelope layer. In the same manner, the polyolefin elastomer composition was extruded by an extruder to prepare a 45 μm thick endothelial layer.

내피층은 타이레진을 접착층으로 하여 외피층과 접착한다. 이때 타이레진 접착층의 두께는 10 μm이다.The endothelial layer is bonded to the outer skin layer using a tie resin as an adhesive layer. The thickness of the tie resin adhesive layer is 10 μm.

실험 2의 식품 포장용 필름은 전체 두께가 70 μm로 형성된다. The film for food packaging of Experiment 2 has a total thickness of 70 μm.

[실험 3][Experiment 3]

6 시간 이상 건조된 PVDC을 압출기로 압출하여 15 μm 두께의 외피층을 제조한다. 마찬가지의 방법으로 폴리올레핀 엘라스토머 조성물을 압출기로 압출하여 45 μm 두께의 내피층을 제조한다. The PVDC, which has been dried for more than 6 hours, is extruded by an extruder to produce a 15 μm thick shell layer. In the same manner, the polyolefin elastomer composition was extruded by an extruder to prepare a 45 μm thick endothelial layer.

내피층은 타이레진을 접착층으로 하여 외피층과 접착한다. 이때 타이레진 접착층의 두께는 10 μm이다.The endothelial layer is bonded to the outer skin layer using a tie resin as an adhesive layer. The thickness of the tie resin adhesive layer is 10 μm.

실험 3의 식품 포장용 필름은 전체 두께가 70 μm로 형성된다.The film for food packaging of Experiment 3 has a total thickness of 70 μm.

[비교 1][Comparison 1]

외피층은 PVDC 조성물로 15 μm 두께로 제조하고, 중간층은 EVOH 조성물로 15 μm 두께로, 내피층은 선형 저밀도 폴리에틸렌(L-LDPE, Linear Low Density Polyethylene)으로 20 μm 두께로 제조한다.The outer skin layer is prepared with a PVDC composition to a thickness of 15 μm, the intermediate layer with an EVOH composition to a thickness of 15 μm, and the endothelial layer to a thickness of 20 μm with L-LDPE (Linear Low Density Polyethylene).

그리고 외피층-중간층 간, 중간층-내피층 간에는 각각 10 μm 두께의 타이레진이 접착층으로 개재된다.A 10 μm thick tie resin is interposed between the sheath layer and the intermediate layer and between the intermediate layer and the endothelium layer.

비교 1의 식품 포장용 필름은 전체 두께가 70 μm로 형성된다.
The food packaging film of Comparative Example 1 has a total thickness of 70 μm.

본 발명의 실시예에 따른 식품 포장용 필름인 실험 1 ~ 실험 3과, 종래 기술인 비교 1의 인장강도, 인열강도, 열수축성을 비교하였다. 열수축성은 식품 포장용 필름에 80 ℃의 열을 가했을 때의 수축하는 정도를 측정하였다.Tensile strength, tearing strength and heat shrinkability of Experiment 1 to Experiment 3, which are films for food packaging according to the examples of the present invention, and Comparative Example 1 of the prior art were compared. The shrinkage of the film for food packaging was measured by heating at 80 캜.

인장강도
(kg/cm2)
The tensile strength
(kg / cm 2 )
인열강도
(kg/cm2)
Phosphorus strength
(kg / cm 2 )
열수축성
(%)
Heat-shrinkable
(%)
실험 1Experiment 1 425425 9797 3232 실험 2Experiment 2 421421 9393 3838 실험 3Experiment 3 445445 102102 4141 비교 1Comparison 1 370370 5555 2828

실험 1 ~ 실험 3 및 비교 1은 필름의 두께가 모두 70 μm로 동일하지만, 본 발명의 실시예에 따른 식품 포장용 필름인 실험 1 ~ 실험 3은 내구성이 향상되었다.In Experiments 1 to 3 and Comparative Example 1, the thicknesses of the films were all equal to 70 탆, but the durability was improved in Experiments 1 to 3, which are films for food packaging according to the embodiment of the present invention.

구체적으로 살펴보면, 표 1에서 나타난 바와 같이, 인장강도와 관련해서는 실험 1 ~ 실험 3가 비교 1에 비하여 1.13 ~ 1.20 배에 향상되었다. 또한 인열강도와 관련해서는 실험 1 ~ 실험 3가 비교 1에 비하여 1.69 ~ 1.85 배 향상되었다. 그리고 열수축성도 실험 1 ~ 실험 3가 비교 1에 비하여 향상되었음을 알 수 있다. Specifically, as shown in Table 1, with respect to the tensile strength, Experiments 1 to 3 were improved to 1.13 to 1.20 times as compared to Comparative Example 1. In terms of tear strength, Experiment 1 to Experiment 3 were improved by 1.69 to 1.85 times as compared to Comparative Experiment 1. And the heat shrinkage properties of Experiment 1 to Experiment 3 were improved compared to Comparative Example 1.

본 실시예는 본 발명에 포함되는 기술적 사상의 일부를 명확하게 나타내고 있는 것에 불과하며, 본 발명의 명세서에 포함된 기술적 사상의 범위 내에서 당업자가 용이하게 유추할 수 있는 다양한 변형예와 구체적인 실시예는 모두 본 발명의 권리범위에 포함되는 것이 자명하다고 할 것이다.It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. Are all included in the scope of the present invention.

Claims (5)

산소 투과를 방지하는 외피층; 및
상기 외피층 일면에 접합되고, 탄성력을 가지며, 폴리올레핀 엘라스토머 조성물을 포함하는 내피층;
을 포함하는 식품 포장용 필름.
An outer skin layer for preventing oxygen permeation; And
An endothelial layer joined to one surface of the outer shell layer and having an elastic force, the endothelial layer comprising a polyolefin elastomer composition;
≪ / RTI >
제1항에 있어서,
상기 외피층은 나일론계 조성물을 포함하는 식품 포장용 필름.
The method according to claim 1,
Wherein the outer layer comprises a nylon-based composition.
제2항에 있어서,
상기 나일론계 조성물은 헥사메틸렌다이아민과 세바스산으로부터 합성한 나일론 610을 포함하는 식품 포장용 필름.
3. The method of claim 2,
Wherein the nylon-based composition comprises nylon 610 synthesized from hexamethylenediamine and sebacic acid.
제1항에 있어서,
상기 폴리올레핀 엘라스토머 조성물은 100 ℃ 이하의 온도에서 열수축 가능한 식품 포장용 필름.
The method according to claim 1,
Wherein the polyolefin elastomer composition is heat shrinkable at a temperature of 100 DEG C or lower.
제1항 또는 제2항에 있어서,
상기 외피층과 내피층 중간에 개재되며, 우레탄계 조성물을 포함하는 중간층;을 더 포함하는 식품 포장용 필름.
3. The method according to claim 1 or 2,
And an intermediate layer interposed between the outer skin layer and the inner skin layer and comprising a urethane-based composition.
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