KR20220046377A - Low melting point adhesive film for carpet fabric - Google Patents

Low melting point adhesive film for carpet fabric Download PDF

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Publication number
KR20220046377A
KR20220046377A KR1020200129708A KR20200129708A KR20220046377A KR 20220046377 A KR20220046377 A KR 20220046377A KR 1020200129708 A KR1020200129708 A KR 1020200129708A KR 20200129708 A KR20200129708 A KR 20200129708A KR 20220046377 A KR20220046377 A KR 20220046377A
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KR
South Korea
Prior art keywords
low
adhesive
adhesive layer
adhesive film
melting
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KR1020200129708A
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Korean (ko)
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김대환
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김대환
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Priority to KR1020200129708A priority Critical patent/KR20220046377A/en
Publication of KR20220046377A publication Critical patent/KR20220046377A/en

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/314—Applications of adhesives in processes or use of adhesives in the form of films or foils for carpets
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/304—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)

Abstract

The present invention relates to an adhesive film having a low melting point and, more specifically, to an adhesive film having a low melting point which is very useful for interlayer adhesion of a sound absorbing and insulating composite type carpet in which a carpet fabric and a sound absorbing material are laminated. The adhesive film having a low melting point according to the present invention, has excellent adhesive strength even at a low temperature when used for letting a sound absorbing material adhere to a carpet fabric, by being configured to include low-melting polyurethane as an adhesive layer.

Description

카페트 원단 저융점 접착필름{Low melting point adhesive film for carpet fabric}Carpet fabric low melting point adhesive film {Low melting point adhesive film for carpet fabric}

본 발명은 저융점 접착필름에 관한 것으로서, 더욱 상세하게는 저융점 폴리우레탄을 접착층으로 가지는 필름을구성하여 카페트 원단에 흡음재를 접착시킬 때 저온에서도 우수한 접착력을 가지도록 하여, 특히 카페트 원단과흡음재가 적층된 흡차음 복합형 카페트의 층간 접착에 매우 유용한 저융점 접착필름에 관한 것이다.The present invention relates to a low-melting adhesive film, and more particularly, to have excellent adhesion even at low temperatures when adhering a sound-absorbing material to a carpet fabric by configuring a film having a low-melting-point polyurethane as an adhesive layer. It relates to a low-melting adhesive film very useful for interlayer adhesion of laminated sound absorbing and insulating composite carpets.

일반적으로 자동차 등의 소음진동(NVH)을 저감시키고 주변 환경을 개선하기 위해 카페트나 각종 흡차음재 등이사용되고 있다.일반적으로 카펫트나 흡차음 소재들의 경우 다양한 적층구조의 원단으로 차음 구조를 가지고 있으나, 최근 흡음성이 부여된 흡차음 복합형 소재로의 개발이 다양하게 이루어지고 있다. 특히, 기존의 카페트 구조는 일반적으로 카펫트 원단의 하부가 차음구조로 되어 있으며, 그 원단의 최하단부에는 중량이 700~1200g/㎡인 AP(애플리케이션 프로세서) 코팅이 처리되어 있고 이 AP 코팅 재질은 폴리에틸렌, 엘라스토머, EVA 등으로 구성되어 있으면서 접착 성분을 가지고 있다. 그런데 여기에 흡음 소재로서 폴리우레탄폼에 폴리에틸렌 필름이 합포된 것을 원단에 부착하여 사용하는데, 이 경우 상기 AP 코팅에 부착되는 부분인 폴리에틸렌 필름이 AP 코팅과 접착되는 접착력은 실질적으로 폴리에틸렌 필름이 아닌 AP 코팅의 접착력에 의해 폴리에틸렌 필름이 접착되면서 흡음 소재가 구비된 카페트가 제조되는 것이다. 따라서 기존에는 합차음 복합형카페트에서 원단과 흡음재를 적층하는 과정에서는 180℃ 이상의 오븐에서 카페트 원단을 가열시키고 이때 AP 코팅이 용융되면서 발포성 흡음재와 합포된 폴리에틸렌 필름이 그 용융된 AP 코팅층에 접착되도록 하고, 이를냉각 금형을 통하여 성형하는 방법으로 흡차음 합형 카페트를 제작하고 있다.In general, carpets and various sound absorbing and insulating materials are used to reduce noise and vibration (NVH) in automobiles and improve the surrounding environment. Recently, various developments have been made into sound absorbing and insulating composite materials with sound absorbing properties. In particular, in the existing carpet structure, the lower part of the carpet fabric is generally a sound-insulating structure, and an AP (application processor) coating with a weight of 700 to 1200 g/m2 is treated on the lower end of the fabric, and the AP coating material is polyethylene, It is composed of elastomer, EVA, etc. and has an adhesive component. However, as a sound-absorbing material, a polyethylene film laminated with polyurethane foam is attached to the fabric and used. In this case, the adhesive force of the polyethylene film, which is the part attached to the AP coating, to the AP coating is substantially not the polyethylene film, but the AP. As the polyethylene film is adhered by the adhesive force of the coating, a carpet equipped with a sound-absorbing material is manufactured. Therefore, in the existing sound-absorbing composite carpet, in the process of laminating the fabric and the sound-absorbing material, the carpet fabric is heated in an oven at 180 ° C. or higher, and at this time, the AP coating is melted, and the foamed sound-absorbing material and the polyethylene film laminated are adhered to the molten AP coating layer. , is manufacturing a sound absorbing and insulating composite carpet by molding it through a cooling mold.

위와 같은 종래 기술의 문제점을 해결하기 위하여, 저온 접착이 가능한 접착용 필름으로서 열가소성 폴리 우레탄으로 이루어진 제1 접착층과 최저온도 60℃ 이상의 저온 접착이 가능한 아로마틱(Aromatic) 베이스의 핫 멜트열가소성 폴리 우레탄으로 이루어진 제2 접착층을 가지도록 구성하는 경우 저온 접착성이 매우 우수하고 인접적층 소재와의 접착력이 우수하여 제작 과정에서 용이하게 저온 접착이 가능하다는 사실을 알게 되어 본 발명을완성하였다. 따라서 본 발명의 목적은 접착성이 매우 우수하고 제작 과정에서 저온 접착이 가능한 새로운 저융점 접착필름을제공하는데 있다. 또한 본 발명은 흡음소재와의 접착성은 물론 고강성 펠트 등과 같은 카페트 원단의 최하층과의 접착성이 매우우수한 저융점 접착필름을 제공하는데 있다. 또한, 본 발명은 내구성이 우수하고 고품질의 흡차음 복합형 카페트를 경량화하고 저렴한 비용을 제조할 수 있는 저융점 접착필름을 제공하는데 있다.In order to solve the above problems of the prior art, a first adhesive layer made of thermoplastic polyurethane as an adhesive film capable of low-temperature bonding and an aromatic-based hot melt thermoplastic polyurethane capable of low-temperature bonding at a minimum temperature of 60°C or higher. When it is configured to have a second adhesive layer, it has been found that low-temperature adhesiveness is very good and adhesive strength with an adjacent laminated material is excellent, so that low-temperature bonding is possible easily during the manufacturing process, and thus the present invention has been completed. Accordingly, an object of the present invention is to provide a novel low-melting adhesive film that has excellent adhesion and can be adhered at a low temperature during the manufacturing process. In addition, the present invention is to provide a low-melting adhesive film which is very excellent in adhesion with the sound-absorbing material as well as the lowermost layer of the carpet fabric such as high-stiffness felt. In addition, the present invention is to provide a low-melting adhesive film having excellent durability and high-quality sound absorbing and insulating composite carpet lightweight and capable of manufacturing at low cost.

위와 같은 과제 해결을 위해, 본 발명에서는 열가소성 폴리 우레탄으로 이루어진 제1 접착층; 최저온도 60℃ 이상의 저온 접착이 가능한 아로마틱(Aromatic) 베이스의 핫 멜트 열가소성 폴리 우레탄으로 이루어진 제2접착층;및 폴리에틸렌(PE) 계열의 보호 필름층을 포함하는 저융점 접착필름을제공한다.또한, 본 발명은 상기 저융점 접착필름을 이용한 제품으로서, 최하층으로 고강도 펠트층을 가지는 카페트 원단과 폴리우레탄 폼의 흡음층이, 상기 접착필름을 이용하여 접착되어 있되 상기 저융점 필름의 보호필름층을 제거하여 접착된 흡차음 복합형 카페트를 제공한다.In order to solve the above problems, in the present invention, a first adhesive layer made of thermoplastic polyurethane; A second adhesive layer made of aromatic-based hot-melt thermoplastic polyurethane capable of low-temperature bonding at a minimum temperature of 60° C. or higher; and a low-melting adhesive film comprising a polyethylene (PE)-based protective film layer. The invention is a product using the low melting point adhesive film, the carpet fabric having a high-strength felt layer as the lowest layer and the sound-absorbing layer of polyurethane foam are adhered using the adhesive film, but by removing the protective film layer of the low melting point film Adhesive sound absorbing and insulating composite carpet is provided.

위와 같은, 본 발명에 따른 저융점 접착필름은 흡차음형 카페트 등에 적용하는 경우 소음방진(NVH) 저감 효과가매우 우수한 흡차음 복합형 카페트의 제조에 매우 유용하다. 또한 이러한 저융점 접착필름을 적용하는 경우 고품질의 카페트에 대한 량화와 원가 절감이 가능한 효과가 있다As described above, the low-melting adhesive film according to the present invention is very useful in the manufacture of a sound absorbing and insulating composite carpet having a very excellent effect of reducing noise and vibration (NVH) when applied to a sound absorbing and insulating carpet. In addition, when such a low-melting adhesive film is applied, it is possible to increase the quantity and reduce costs for high-quality carpets.

본 발명은 하나의 구현예로서 더욱 상세하게 설명하면 다음과 같다. 본 발명에 따른 저융점 접착 필름이 가장 바람직하게 적용되는 곳은 차량용 카페트와 같이 외관을 미려하게 하는 등의 편의성을 부여함과 동시에 소음진동(NVH)을 방지하기 위해 사용되는 카펫트이다. 종래의 카페트의 구성과는 달리 본 발명에 따른 저융점 접착 필름이 바람직하게 적용되는 카페트는 단순한 차음에서 흡음 효과까지가지는 흡차음 복합형으로 개선된 고품질의 카페트를 구성할 수 있도록 하기 위해, 카페트의 원단 최하층을 기존의 AP 코팅 대신에 차음 효과와 물성이 우수하고 경량화가 가능한 고강성 펠트로 구성하는 것이 바람직하다. 그런데, 이러한 고강성 펠트는 오븐을 통과해도 용융이 이루어지지 않고 접착 성질을 가지지 못한다. 그러므로이러한 카페트 원단의 최하층을 구성하는 고강성 펠트는 종래 적용되었던 AP코팅과 달리 성형시 고강성 펠트의잠열을 이용하여 흡음층으로 적용되는 폴리우레탄 폼과 결합된 접착필름을 용융시켜 접착시켜야 원단과 흡수층이 일체화된 합포로 제조가 가능하다. 그러나 고강성 펠트는 오븐 통과 후 성형시 잠열에 의해 필름을 용융시켜접착을 가능케 해야하므로 실질적 접착필름에 절달되는 온도가 70℃ 이하로 매우 낮아 융점이 100℃ 이상인 통상 접착필름으로 사용되는 폴리에틸렌 필름 또는 올레핀 계열의 필름은 접착 결합이 불가하다. 이러한 고강성 펠트가 도입된 카페트 원단에 폴리우레탄 폼의 흡음층을 합포하여 일체화하기 위해 해결하여야하는 접착성 문제를 해결하기 위해, 본 발명에서는 바람직하게도 열가소성 폴리우레탄으로 이루어진 제1 접착층에 합지된 형태의 최저온도 60℃ 이상의 저온 접착이 가능한 제2 접착층 및 보호 필름층을 포함하는 저융점 접착필름을 제공하는 것이다. 본 발명에 따르면, 상기 열가소성 폴리 우레탄으로 이루어진 제1 접착층은 카페트 원단과 결합되는 폴리우레탄폼의 흡음층과 접착되는 부분이다. 이러한 제1 접착층은 상기 흡음층의 폴리우레탄 폼과 접착성이 좋고 상용성이 우수하며, 바람직하게도 발포 접착 및 발포 온도와 압력으로 인하여 누액이 발생되는 것을 방지하는 역할을한다. 이와 같은 제1 접착층은 제2 접착층으로 도입되는 저융점 폴리 우레탄과 일체형으로 적용이 가능하다. 그러므로 열가소성 폴리우레탄으로 이루어지는 것이 사용되어야 한다. 만일, 제1 접착층을 폴리우레탄이 아닌 PO나PE재질로 구성하는 경우 공압출로 후술하는 제2 접착층 등과 접착필름을 구성하는 경우 저융점 폴리우레탄과 분리현상이 발생한다. 따라서 본 발명에서는 제1 접착층은 바람직하게도 상기 흡음층인 폴리우레탄 폼과 상용성이 좋고 제2 접착층을 이루는 저융점 폴리우레탄과 분리되지 않으면서 발포액의 누액 방지 및 접착을 가능하게하는 열가소성 폴리우레탄으로 구성할 수 있다. 이러한 제1 접착층을 도입하는 이유는, 본 발명에 따른 저융점 접착필름을 제조하는 과정에서 1차 롤(Roll)에서접착필름의 내층인 제2 접착층이 서로 겹쳐진 후 겹친 필름 양쪽을 절단하여 2차 롤에서 2개의 필름으로 분리되는데, 생산 과정에서 테키가 유지되는 것들은 1차 롤에서 필름끼리 붙어 2차 롤에서 분리가 이루어지지 않아 와인딩이 불가능해 진다. 그러므로 이러한 문제를 해결하고 본 발명에 따른 저융점 접착필름의 생산과정에서 제2접착층만으로 구성하는 경우 제조공정 중에서 롤에서 필름이 서로 겹치지 않도록 하기 위해 제1 접착층을 외층으로 도입하는 것이다. 본 발명에 따르면 이러한 제1 접착층은 그 두께가 5 ~100㎛인 것이 접착성과 접착 내구성 면에서 바람직하다. 본 발명에 따른 제2 접착층은 최저온도 60℃ 이상의 저온 접착이 가능한 아로마틱(Aromatic) 베이스의 핫 멜트열가소성 폴리우레탄으로 이루어진 것을 특징으로 한다.이러한 본 발명의 제2 접착층은 폴리에스터 섬유 고강성 펠트의 열 접착면에 접하여 적용됨으로서, 카페트 최하층의 펠트와 폴리우레탄 폼의 흡음층 사이의 접착을 위해 적용되는 것이다. 제2 접착층은 그 두께는 10~100㎛인 것이 고강도 펠트를 고려할 때 가장 바람직하다. 본 발명에서 제2 접착층은 저융점 폴리머로 최저 온도 60℃ 이상의 저온 접착이 가능한 폴리머로서, 저융점 폴리 우레탄 생산시 경화가 완전히 이루어지지 않고 용융된수지와 고체 중간단계로 생산이 이루어진다. 즉, 완전하게 경화가 이루어 지지 않아 제조과정에서 상향으로 올라가지 못하고 수지가 흐르면서 필름 형성이 이루어지지 않는다. 그러므로, 저융점 폴리우레탄으로 이루어지는제2 접착층을 형성하는 경우 그 제조과정에서 상기한 제1 접착층과 상기한 보호 필름층인 캐리어(Carrier)필름등이 함께 제2 접착층의 양쪽에서 층을 형성하도록 구성하여서 제2 접착층을 양 옆에서 같이 끌고 올라갈 수 있도록 제2 접착층의 상하에 배치하여 층 구성을 하여야 바람직한 제2 접착층의 형성이 가능한 것이다. 본 발명에 따르면 이러한 제2 접착층을 이루는 아로마틱 베이스 저융점 열가소성 폴리우레탄은 아디프산(AA;adipic acid), MDI(methylene diphenyl diiocyanate), 1,4-부탄디올 및 폴리올(-OH)을 포함하는 것이 바람직하다. 좀 더 구체적으로는 아디프산 5~10중량%, MDI 8~40중량%, 1,4-부탄디올 3~13중량%, 폴리올이 40~80중량%로 함유되어 있는 것이 바람직하게 사용될 수 있다. 더욱 바람직하게는 아디프산 7~10중량%, MDI 10~20중량%,1,4-부탄디올 5~10중량%, 폴리올 60~78중량%로 함유되어 있는 것이 바람직하게 사용될 수 있다. 본 발명에 의하면 저융점 열가소성 폴리우레탄은 MDI를 기본으로 1,4-부탄디올 탄성체와 폴리올 및 아디프산 함량 및 분자량에 의해 융점이 결정되므로 상기와 같은 조성으로 구성하면 융점이 최저 60℃, 더욱 좋기로는 60~80℃ 인 저융점 열가소성 폴리우레탄이 얻어질 수 있다. 본 발명에 따른 폴리에틸렌(PE) 계열의 보호 필름층은 캐리어(Carrier) 필름으로서 그 두께는 10 ~ 100㎛ 인 것이 필름제작 및 제2 접착층의 보호와 이형적 특성을 발휘하는데 바람직하다. 이러한 보호필름층은 저융점 핫멜트 수지인 제2 접착층의 태키(Tacky)성으로 인한 오염 방지 및 필름 성형 버블 안정성 용도로 적용되고, 또제2 접착층의 형성과 같은 제조과정에서의 필요성에 의해 도입되는 이형필름으로서, 본 발명에 따른 저융점 접착필름을 카페트의 원단과 흡음층(폴리우레탄 폼)을 합포하기 위해 카페트 원단의 고강성 펠트층에 접착하기 직전 박리하여 제거하고 제1 접착층과 제2 접착층만으로 적용하여 흡차음 복합형 카페트를 제조하는 것이다.The present invention will be described in more detail as one embodiment as follows. The place where the low-melting adhesive film according to the present invention is most preferably applied is a carpet used to prevent noise and vibration (NVH) while providing convenience, such as a beautiful appearance, like a vehicle carpet. Unlike the conventional carpet configuration, the carpet to which the low-melting adhesive film according to the present invention is preferably applied is a sound absorbing and insulating composite type having a sound absorbing and insulating effect from a simple sound absorbing and insulating effect. It is preferable that the lowermost layer of the fabric be made of high-stiffness felt, which has excellent sound insulation and physical properties, and is capable of reducing weight, instead of the conventional AP coating. However, such a high-stiffness felt does not melt even if it passes through an oven and does not have adhesive properties. Therefore, unlike the conventionally applied AP coating, the high-stiffness felt constituting the lowest layer of this carpet fabric uses the latent heat of the high-stiffness felt during molding to melt the adhesive film combined with the polyurethane foam applied as a sound-absorbing layer to adhere to the fabric. The absorbent layer can be manufactured as an integrated plywood. However, since the high-strength felt needs to melt the film by latent heat during molding after passing through the oven to enable adhesion, the actual temperature at which the adhesive film is cut is very low (70°C or less), so the melting point is 100°C or higher. Olefin-based films cannot be adhesively bonded. In order to solve the adhesive problem to be solved in order to integrate the sound-absorbing layer of polyurethane foam into the carpet fabric into which the high-stiffness felt is introduced, in the present invention, it is preferably laminated to the first adhesive layer made of thermoplastic polyurethane. To provide a low-melting adhesive film comprising a second adhesive layer and a protective film layer capable of low-temperature adhesion of at least 60 ° C. According to the present invention, the first adhesive layer made of the thermoplastic polyurethane is a portion that is adhered to the sound-absorbing layer of the polyurethane foam combined with the carpet fabric. This first adhesive layer has good adhesiveness and compatibility with the polyurethane foam of the sound-absorbing layer, and preferably serves to prevent leakage due to foaming adhesion and foaming temperature and pressure. Such a first adhesive layer can be applied integrally with the low-melting-point polyurethane introduced into the second adhesive layer. Therefore, one made of thermoplastic polyurethane must be used. If the first adhesive layer is made of a PO or PE material, not polyurethane, a separation phenomenon from low-melting polyurethane occurs when an adhesive film is formed with a second adhesive layer and the like to be described later by co-extrusion. Therefore, in the present invention, the first adhesive layer preferably has good compatibility with the polyurethane foam, which is the sound-absorbing layer, and is not separated from the low-melting polyurethane constituting the second adhesive layer. can be configured as The reason for introducing this first adhesive layer is that, in the process of manufacturing the low-melting adhesive film according to the present invention, the second adhesive layer, which is the inner layer of the adhesive film, is overlapped with each other in the first roll, and then both sides of the overlapping film are cut It is separated into two films on the roll, and those that are maintained during the production process stick to the films on the first roll and cannot be separated on the second roll, making winding impossible. Therefore, in order to solve this problem and to prevent the films from overlapping each other in the roll during the manufacturing process when only the second adhesive layer is formed in the production process of the low-melting adhesive film according to the present invention, the first adhesive layer is introduced as an outer layer. According to the present invention, it is preferable in terms of adhesiveness and adhesion durability that the first adhesive layer has a thickness of 5 to 100 μm. The second adhesive layer according to the present invention is characterized in that it is made of an aromatic-based hot-melt thermoplastic polyurethane capable of low-temperature bonding at a minimum temperature of 60°C or higher. As it is applied in contact with the thermal bonding surface, it is applied for adhesion between the felt of the lowest layer of the carpet and the sound-absorbing layer of the polyurethane foam. The thickness of the second adhesive layer is most preferably 10 to 100 μm in consideration of the high strength felt. In the present invention, the second adhesive layer is a low-melting polymer, a polymer capable of bonding at a low temperature of at least 60° C., and is not completely cured when producing low-melting-point polyurethane, but is produced as an intermediate step between a molten resin and a solid. That is, the film is not formed as the resin flows without being able to rise upward during the manufacturing process because it is not completely cured. Therefore, in the case of forming the second adhesive layer made of low-melting polyurethane, in the manufacturing process, the first adhesive layer and the carrier film, which is the protective film layer, are configured to form a layer on both sides of the second adhesive layer. Therefore, a desirable second adhesive layer can be formed by arranging the second adhesive layer above and below the second adhesive layer so that the second adhesive layer can be dragged and raised from both sides. According to the present invention, the aromatic base low-melting-point thermoplastic polyurethane constituting the second adhesive layer may include adipic acid (AA), methylene diphenyl diiocyanate (MDI), 1,4-butanediol, and polyol (-OH). desirable. More specifically, 5 to 10% by weight of adipic acid, 8 to 40% by weight of MDI, 3 to 13% by weight of 1,4-butanediol, and 40 to 80% by weight of polyol may be preferably used. More preferably, those containing 7 to 10% by weight of adipic acid, 10 to 20% by weight of MDI, 5 to 10% by weight of 1,4-butanediol, and 60 to 78% by weight of polyol may be preferably used. According to the present invention, the melting point of the low-melting-point thermoplastic polyurethane is determined by the content and molecular weight of the 1,4-butanediol elastomer, polyol, and adipic acid based on MDI, so if the composition is as described above, the melting point is at least 60° C., even better As a furnace, a low-melting-point thermoplastic polyurethane having a temperature of 60 to 80°C can be obtained. The polyethylene (PE)-based protective film layer according to the present invention is a carrier film and has a thickness of 10 to 100 μm. This protective film layer is applied for the purpose of preventing contamination due to the tacky property of the second adhesive layer, which is a low-melting hot melt resin, and for film forming bubble stability, and release introduced by necessity in the manufacturing process such as formation of the second adhesive layer. As a film, the low-melting-point adhesive film according to the present invention is peeled off immediately before adhering to the high-stiffness felt layer of the carpet fabric in order to laminate the fabric of the carpet and the sound-absorbing layer (polyurethane foam), and only the first adhesive layer and the second adhesive layer are used. It is applied to manufacture a sound absorbing and insulating composite carpet.

Claims (1)

열가소성 폴리 우레탄으로 이루어진 제1 접착층;60~80℃의 저온에서 접착이 가능한 아로마틱 (Aromatic) 베이스의 핫 멜트 열가소성 폴리 우레탄으로 이루어진제2 접착층; 및폴리에틸렌(PE) 계열의 보호 필름층을 포함하되, 상기 제1 접착층과 제2 접착층에 대한 합포 온도가 압력 1~15kg/㎠에서 60~150℃인 저융점 접착필름.제1 접착층은 그 두께가 5 ~100㎛인 것을 특징으로 하는 저융점 접착필름.청구항 1에 있어서, 보호필름층은 슬립제로서 히드록시 에틸아민(oxy ethyl follow amine), 폴리옥시에틸렌 알킬아민(polyoxy ethylene alkyl amine), 라우릭 디에틸아미드(lauric diethyl amide), 스테아르산 모노글리세라이드(stearic acid monoglyceride), 글리세릴 스테아레이트(glyceryl stearate) 중에서 선택된 것을 추가로함유하는 것을 특징으로 하는 저융점 접착필름.A first adhesive layer made of a thermoplastic polyurethane; A second adhesive layer made of an aromatic-based hot-melt thermoplastic polyurethane capable of adhesion at a low temperature of 60 ~ 80 ℃; and a polyethylene (PE)-based protective film layer, wherein the bonding temperature for the first and second adhesive layers is 60 to 150° C. at a pressure of 1 to 15 kg/cm 2 . The first adhesive layer has its thickness A low-melting adhesive film, characterized in that it has a thickness of 5 to 100 μm. The method according to claim 1, wherein the protective film layer comprises hydroxy ethyl follow amine, polyoxy ethylene alkyl amine, and a slip agent as a slip agent. Lauric diethyl amide (lauric diethyl amide), stearic acid monoglyceride (stearic acid monoglyceride), glyceryl stearate (glyceryl stearate) low-melting adhesive film, characterized in that it further contains selected from.
KR1020200129708A 2020-10-07 2020-10-07 Low melting point adhesive film for carpet fabric KR20220046377A (en)

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