KR102470342B1 - Eco-friendly decoration sheet containing chemically recycled polyethylene terephthalate resin - Google Patents

Eco-friendly decoration sheet containing chemically recycled polyethylene terephthalate resin Download PDF

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KR102470342B1
KR102470342B1 KR1020220043189A KR20220043189A KR102470342B1 KR 102470342 B1 KR102470342 B1 KR 102470342B1 KR 1020220043189 A KR1020220043189 A KR 1020220043189A KR 20220043189 A KR20220043189 A KR 20220043189A KR 102470342 B1 KR102470342 B1 KR 102470342B1
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pet
layer
polyethylene terephthalate
eco
terephthalate resin
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KR1020220043189A
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Korean (ko)
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김동희
조사현
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주식회사 현대엘앤씨
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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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
    • 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
    • B32B7/00—Layered 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
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • 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
    • B32B2272/00—Resin or rubber layer comprising scrap, waste or recycling material
    • 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
    • B32B2451/00—Decorative or ornamental articles

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Abstract

The present invention relates to an eco-friendly decoration sheet including a chemically regenerated polyethylene terephthalate resin, and more specifically, to an eco-friendly decoration sheet including a chemically regenerated polyethylene terephthalate resin, which is a decorative sheet that is attached to the surface of furniture, doors, kitchens, and the like to finish the surface to have decorative beauty, has no generation of endocrine disruptors in spite of maximizing a regeneration rate by using a chemically recycled polyethylene terephthalate resin, and has little color deviation while having a multi-layered structure, thereby being improved to maintain the same level of quality as existing products.

Description

화학적 재생 폴리에틸렌테레프탈레이트 수지를 포함한 친환경 데코레이션 시트{Eco-friendly decoration sheet containing chemically recycled polyethylene terephthalate resin}Eco-friendly decoration sheet containing chemically recycled polyethylene terephthalate resin}

본 발명은 화학적 재생 폴리에틸렌테레프탈레이트 수지를 포함한 친환경 데코레이션 시트에 관한 것으로, 보다 상세하게는 가구, 도어, 주방 등의 표면에 부착되어 장식미를 갖도록 표면을 마감하는 데코시트로서 특히 화학적 재생 폴리에틸렌테레프탈레이트 수지를 활용하여 재생비율을 극대화시킴에도 불구하고 환경 호르몬 발생이 없고 다층 구조를 가지면서 색상편차가 적어 기존 제품과 동등 수준의 품질을 유지할 수 있도록 개선된 화학적 재생 폴리에틸렌테레프탈레이트 수지를 포함한 친환경 데코레이션 시트에 관한 것이다.The present invention relates to an eco-friendly decoration sheet containing chemically regenerated polyethylene terephthalate resin, and more particularly, as a decorative sheet attached to the surface of furniture, doors, kitchens, etc. to finish the surface to have decorative beauty, in particular chemically regenerated polyethylene terephthalate resin. In spite of maximizing the regeneration rate by utilizing environmental hormones, eco-friendly decoration sheet containing improved chemically regenerated polyethylene terephthalate resin to maintain the same level of quality as existing products with no generation of endocrine disruptors and less color deviation while having a multi-layered structure. it's about

데코레이션시트는 가구, 도어, 주방 등의 표면을 마무리하는 시트로서, 흔히 데코시트라 칭하고 있다.The decoration sheet is a sheet that finishes the surfaces of furniture, doors, kitchens, etc., and is commonly referred to as a decoration sheet.

이러한 데코시트는 우수한 가공성과 열변형성, 신장율, 저렴한 가격 등의 이유로 대부분 폴리염화비닐(PVC:Polyvinyl chloride) 수지가 사용되어 왔다.These decorative sheets have been mostly polyvinyl chloride (PVC) resins for reasons such as excellent workability, heat deformation, elongation, and low price.

하지만, PVC 수지의 경우 폐기나 소각시 다이옥신 등 환경 호르몬이 발생되며, 이러한 환경 호르몬은 인체에 축적시 암을 유발하는 등의 문제가 있기 때문에 많은 규제가 따르고 있다. However, in the case of PVC resin, environmental hormones such as dioxin are generated during disposal or incineration, and since these environmental hormones cause cancer when accumulated in the human body, many regulations are being followed.

이를 해결하기 위해, 환경 호르몬 발생이 없는 친환경 소재의 적용이 필요하며, 대표적으로 폴리에틸렌테레프탈레이트(PET:Polyethylene terephthalate)를 이용한 데코레이션 시트가 생산되고 있다.In order to solve this problem, it is necessary to apply eco-friendly materials that do not generate endocrine disruptors, and representatively, decoration sheets using polyethylene terephthalate (PET) are being produced.

이때, 종래 PET 소재의 데코시트는, 보통 표면층에 변성 폴리에틸렌테레프탈레이트(Glycol modified polyethylene terephthalate, 이하 'PETG'라 함), 중앙층에 무정형 폴리에틸렌테레프탈레이트(Amorphous Polyethylene terephthalate, 이하 'APET'이라 함)와 같은 폴리에스테르계 수지를 복합하여 T-Die 압출 방식을 통한 다층의 구조로 형성되어 도 1의 예시와 같이 활용된다.At this time, the decorative sheet of conventional PET material is usually modified polyethylene terephthalate (Glycol modified polyethylene terephthalate, hereinafter referred to as 'PETG') on the surface layer, and amorphous polyethylene terephthalate (Amorphous Polyethylene terephthalate, hereinafter referred to as 'APET') on the center layer. It is formed into a multi-layered structure through a T-Die extrusion method by combining polyester-based resins such as, and is utilized as shown in FIG.

여기에서, 다양한 색상을 구현하기 위해서 배합내에 TiO2 등의 피그먼트(Pigment)를 혼합하여 처방하는 것이 일반적이며, 내스크래치, 내오염성 등의 기능성을 부여하기 위해 표면쪽에 UV/열경화 수지 등의 기능성 코팅이 이루어지기도 한다.Here, in order to realize various colors, it is common to mix and prescribe pigments such as TiO 2 in the formulation, and to impart functionality such as scratch resistance and stain resistance, UV / thermosetting resin etc. Functional coatings may also be applied.

그런데, APET의 경우 글리콜 성분의 부재로 기능성 코팅층과의 부착력 확보에 어려움이 있기 때문에 표면층에 글리콜 성분이 포함된 PETG층을 구현함으로써 기능성 코팅 수지와의 부착력이 확보하고 있으며, 또한 PETG층의 경우 후면에도 형성되어 가구 표면재로 적용될 경우 MDF와의 부착력도 우수하게 작용한다.However, in the case of APET, since it is difficult to secure adhesion with the functional coating layer due to the absence of a glycol component, adhesion with the functional coating resin is secured by implementing a PETG layer containing a glycol component on the surface layer, and in the case of the PETG layer, When applied as a surface material for furniture, it also has excellent adhesion with MDF.

한편, 최근 환경 보호를 위해서 일회용 PET를 재생한 수지를 포장재, 각종 용기, 데코레이션 시트 등 다양한 용도에 적용하여 사용중에 있다.On the other hand, in order to protect the environment, recently, disposable PET is recycled and used in various applications such as packaging materials, various containers, and decoration sheets.

이때, 사용되는 재생 PET 수지(APET)의 경우, 일회용 PET 물병 등 폐플라스틱을 수거, 선별, 세척, 분쇄, 압출 등의 물리적인 재활용 공정을 거쳐 제조한 것(이하 'MR-PET:Mechanical Recycle-PET'이라 함)을 제조 특성상 이물관리, 색상관리 등이 버진(virgin) PET 수지 대비 취약한 한계점이 있어 데코시트에는 단독으로 적용하는 것에 어려움이 있다.At this time, in the case of recycled PET resin (APET), waste plastic such as disposable PET water bottles is manufactured through a physical recycling process such as collection, sorting, washing, crushing, and extrusion (hereinafter referred to as 'MR-PET: Mechanical Recycle- Referred to as 'PET') due to the nature of manufacturing, foreign matter management, color management, etc. are vulnerable compared to virgin PET resin, so it is difficult to apply it alone to decorative sheets.

특히, 버진 합성수지(virgin synthetic resin)에 비해 낮은 명도(lightness)와 높은 황색도(yellowness)를 가지며, 재생 합성수지는 공정 중에 쉽게 열화되며, 이 때문에 재생 합성수지에서는 황변현상이 자주 나타난다.In particular, it has lower lightness and higher yellowness than virgin synthetic resins, and regenerated synthetic resins are easily deteriorated during processing, so yellowing often occurs in regenerated synthetic resins.

때문에, 합리적이고 효율적인 범위 내에서 재활용율을 높일 수 있는 기술 개발의 필요성이 시급히 요청되고 있다.Therefore, there is an urgent need to develop a technology capable of increasing the recycling rate within a reasonable and efficient range.

국내 공개특허 제10-2021-0071900호(2021.06.16.) '표면 마감재'Domestic Patent Publication No. 10-2021-0071900 (2021.06.16.) 'Surface Finishing Material'

본 발명은 상술한 바와 같은 종래 기술상의 제반 문제점들을 감안하여 이를 해결하고자 창출된 것으로, 가구, 도어, 주방 등의 표면에 부착되어 장식미를 갖도록 표면을 마감하는 데코시트로서 특히 화학적 재생 폴리에틸렌테레프탈레이트 수지를 활용하여 재생비율을 극대화시킴에도 불구하고 환경 호르몬 발생이 없고 다층 구조를 가지면서 색상편차가 적어 기존 제품과 동등 수준의 품질을 유지할 수 있도록 개선된 화학적 재생 폴리에틸렌테레프탈레이트 수지를 포함한 친환경 데코레이션 시트을 제공함에 그 주된 목적이 있다.The present invention was created to solve these problems in view of the various problems in the prior art as described above, and is a decorative sheet that is attached to the surface of furniture, doors, kitchens, etc. to finish the surface to have decorative beauty, in particular, chemically regenerated polyethylene terephthalate resin. Provides an eco-friendly decoration sheet containing chemically regenerated polyethylene terephthalate resin that has been improved to maintain the same level of quality as existing products with no generation of endocrine disruptors and low color deviation while having a multi-layered structure despite maximizing the regeneration rate by using has its main purpose.

본 발명은 상기한 목적을 달성하기 위한 수단으로, CR-PET 단일층(10)으로 압출성형되고; 상기 CR-PET 단일층(10)은 CR-PET 70-90중량%와, 안료 10-30중량%로 이루어져 색상 편차(△E) 1.0 이하를 유지하는 것을 특징으로 하는 화학적 재생 폴리에틸렌테레프탈레이트 수지를 포함한 친환경 데코레이션 시트를 제공한다.As a means for achieving the above object, the present invention is extruded into a CR-PET single layer (10); The CR-PET single layer 10 is a chemically regenerated polyethylene terephthalate resin, which is composed of 70-90% by weight of CR-PET and 10-30% by weight of pigment and maintains a color deviation (ΔE) of 1.0 or less. It provides an eco-friendly decoration sheet including

또한, 본 발명은 MR-PET 중앙층(20), 상기 MR-PET 중앙층(20)의 상면을 이루는 CR-PET 상부층(30), 상기 MR-PET 중앙층(20)의 하면을 이루는 CR-PET 하부층(40)의 3층 구조를 갖도록 티-다이를 통해 압출성형된 것을 특징으로 하는 화학적 재생 폴리에틸렌테레프탈레이트 수지를 포함한 친환경 데코레이션 시트를 제공한다.In addition, the present invention includes the MR-PET central layer 20, the CR-PET upper layer 30 constituting the upper surface of the MR-PET central layer 20, and the CR-PET constituting the lower surface of the MR-PET central layer 20. To have a three-layer structure of the PET lower layer (40) T-to provide an eco-friendly decoration sheet containing a chemically regenerated polyethylene terephthalate resin characterized in that extruded through the die.

이때, 본 발명은 상기 데코레이션시트를 이루는 재생 PET인 MR-PET과 CR-PET의 총합은 70-90중량%, 각 층에 함유되는 안료의 총합은 10-30중량%가 되게 하되, MR-PET 중앙층(20) 뿐만 아니라 CR-PET 상부층(30)과 CR-PET 하부층(40)에도 안료 투입을 통해 중앙 MR-PET층(20)에서 발생하는 색상편차를 보정하여 색상 편차(△E) 1.0 이하를 유지하는 것에도 그 특징이 있다.At this time, in the present invention, the total of MR-PET and CR-PET, which are recycled PET constituting the decoration sheet, is 70-90% by weight, and the total amount of pigments contained in each layer is 10-30% by weight, but MR-PET Color deviation (ΔE) 1.0 is corrected by correcting the color deviation occurring in the central MR-PET layer 20 by adding pigment to the upper CR-PET layer 30 and the lower CR-PET layer 40 as well as the central layer 20. It is also characterized by maintaining the following.

또한, 상기 CR-PET 상부층(30) 위에는 상부 프라이머층(32)을 더 형성하고, 상기 CR-PET 하부층(40) 아래에는 하부 프라이머층(42)을 더 형성하며, 상기 상부 프라이머층(32) 위에는 기능성 코팅층(50)을 더 형성한 것에도 그 특징이 있다.In addition, an upper primer layer 32 is further formed on the CR-PET upper layer 30, and a lower primer layer 42 is further formed below the CR-PET lower layer 40, and the upper primer layer 32 It is also characterized by further forming a functional coating layer 50 on top.

또한, 상기 상부 프라이머층(32)과 하부 프라이머층(42)은 우레탄계 혹은 아크릴계 수지로 형성되는 것에도 그 특징이 있다.Also, the upper primer layer 32 and the lower primer layer 42 are made of urethane or acrylic resin.

또한, 상기 기능성 코팅층(50)은 UV 또는 열경화 코팅층인 것에도 그 특징이 있다.In addition, the functional coating layer 50 is characterized in that it is a UV or thermal curing coating layer.

본 발명에 따르면, 다음과 같은 효과를 얻을 수 있다.According to the present invention, the following effects can be obtained.

첫째, 리사이클 합성수지의 활용률을 높일 수 있는 폴리에틸렌테레프탈레이트 데코시트를 제공하여 친환경성을 극대화시킬 수 있다.First, it is possible to maximize eco-friendliness by providing a polyethylene terephthalate decorative sheet that can increase the utilization rate of recycled synthetic resin.

둘째, 리사이클 합성수지의 함량을 높임에도 불구하고 색차와 기계적 물성은 기존 제품과 동등 수준을 유지할 수 있다.Second, despite increasing the content of recycled synthetic resin, color difference and mechanical properties can be maintained at the same level as existing products.

셋째, 재생 폴리에틸렌테레프탈레이트을 사용하면서도 소각시 다이옥신을 비롯한 유해물질 배출이 없어 친환경성을 높이는 효과가 있다.Third, while using recycled polyethylene terephthalate, there is no emission of harmful substances including dioxin during incineration, which has an effect of enhancing eco-friendliness.

도 1은 일반적인 데코시트의 적용예를 보인 예시적인 사진이다.
도 2는 본 발명에 따른 데코시트의 기본층 구조를 보인 예시적인 단면도이다.
도 3 및 도 4는 본 발명에 따른 데코시트의 변형예를 보인 예시적인 단면도이다.1 is an exemplary photograph showing an application example of a general decorative sheet.
Figure 2 is an exemplary cross-sectional view showing the base layer structure of the decor sheet according to the present invention.
3 and 4 are exemplary cross-sectional views showing a modification of the decorative sheet according to the present invention.

이하에서는, 첨부도면을 참고하여 본 발명에 따른 바람직한 실시예를 보다 상세하게 설명하기로 한다.Hereinafter, preferred embodiments according to the present invention will be described in more detail with reference to the accompanying drawings.

본 발명 설명에 앞서, 이하의 특정한 구조 내지 기능적 설명들은 단지 본 발명의 개념에 따른 실시예를 설명하기 위한 목적으로 예시된 것으로, 본 발명의 개념에 따른 실시예들은 다양한 형태로 실시될 수 있으며, 본 명세서에 설명된 실시예들에 한정되는 것으로 해석되어서는 아니된다.Prior to the description of the present invention, the following specific structural or functional descriptions are only exemplified for the purpose of explaining embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms, It should not be construed as limited to the embodiments described herein.

또한, 본 발명의 개념에 따른 실시예는 다양한 변경을 가할 수 있고 여러 가지 형태를 가질 수 있으므로 본 발명의 사상 및 기술 범위에 포함되는 모든 변경물, 균등물 내지 대체물을 포함하는 것으로 이해되어야 한다.In addition, since the embodiments according to the concept of the present invention can have various changes and various forms, it should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

본 발명에 따른 친환경 데코레이션 시트는 제조시 혼용되었던 버진(Virgin) PETG 부분을 화학적 재활용처리를 통해 제조된 리사이클(Recycle) PET 수지(이하 'CR-PET:Chemical Recycle-PET'라 함)로 대체하여 데코시트 내의 재생원료 비율을 기존 대비 높였음에도 불구하고 생산된 제품의 물성은 기존 제품 동등 수준의 품질(외관, 색상 등)을 갖도록 한 데코시트를 제공한다.The eco-friendly decoration sheet according to the present invention replaces the virgin PETG part that was mixed during manufacturing with recycled PET resin (hereinafter referred to as 'CR-PET: Chemical Recycle-PET') manufactured through chemical recycling treatment, Despite the fact that the ratio of recycled raw materials in the decorative sheet has been increased compared to the previous one, the physical properties of the produced product provide a decorative sheet with the same quality (appearance, color, etc.) as the existing product.

여기에서, CR-PET를 만드는 방법은 수거, 선별, 세척, 분쇄한 폐PET를 해중합(Depolymerization)후 다시 중합공정을 거침으로써 펠릿(Pellet) 형태의 CR-PET 레진(Resin)이 만들어지게 된다.Here, the method of making CR-PET is to depolymerize the collected, sorted, washed, and pulverized waste PET and then go through the polymerization process again to make CR-PET resin in the form of a pellet.

이 경우, '해중합'은 고분자 물질이 형성되는 과정인 중합과정을 역행해 단량체로 만드는 기술로서, 재활용을 거친 플라스틱의 물성이 처음 만들어진 플라스틱과 유사하다는 장점이 있고, 가능한 수지는 PET, 폴리우레탄으로 한정된다.In this case, 'depolymerization' is a technology that reverses the polymerization process, which is the process of forming polymer materials, to make monomers. It has the advantage that the physical properties of recycled plastic are similar to those of the first plastic, and possible resins are PET and polyurethane. limited

이러한 해중합 기술은 낮은 열과 추가 압력을 사용하여 PET를 '테레프탈산(TPA)', '디메틸 테레프탈레이트(DMT)', '모노에틸렌 글리콜(MEG)' 등의 단량체로 분해한 후 이를 정제하고 중합(재결합)하여 재생 PET, 즉 CR-PET을 만들게 된다.This depolymerization technology uses low heat and additional pressure to decompose PET into monomers such as 'terephthalic acid (TPA)', 'dimethyl terephthalate (DMT)', and 'monoethylene glycol (MEG)', then purifies and polymerizes (recombines) them. ) to make recycled PET, that is, CR-PET.

때문에, 기계적 재활용(MR-PET)보다는 버진 PET에 가까운 물성을 갖는 CR-PET와 안료를 혼용하여 사용함으로써 MR-PET 만으로는 얻을 수 없는 색상 편차(△E)를 얻을 수 있다.Therefore, color deviation (ΔE) that cannot be obtained with MR-PET alone can be obtained by using a mixture of CR-PET and pigments, which have physical properties closer to virgin PET than mechanical recycling (MR-PET).

즉, 기존 MR-PET으로는 일정한 수준의 색상 관리가 어려워 어쩔 수 없이 버진 PET(PETG) 층을 혼용하여 사용할 수 밖에 없었던 단점을 일거에 해소할 수 있게 된다. 바꾸어 말하자면, 본 발명은 재생 PET만으로 색상 편차(△E) 1.0 이하, 더 바람직하게는 0.5 이하의 데코시트를 만들 수 있게 된다.In other words, it is difficult to manage a certain level of color with the existing MR-PET, so the disadvantage of inevitably using a virgin PET (PETG) layer in combination can be solved at once. In other words, the present invention makes it possible to make a decorative sheet with a color deviation (ΔE) of 1.0 or less, more preferably 0.5 or less, only with recycled PET.

보다 구체적으로, 본 발명에 따른 화학적 재생 폴리에틸렌테레프탈레이트 수지를 포함한 친환경 데코레이션 시트는 도 2의 예시와 같이, CR-PET 단일층(10)으로 압출성형된다.More specifically, the eco-friendly decoration sheet including the chemically regenerated polyethylene terephthalate resin according to the present invention is extruded into a CR-PET single layer 10, as shown in FIG.

이때, 상기 CR-PET 단일층(10)은 CR-PET 70-90중량%와, 안료 10-30중량%로 이루어지며, 안료는 색상 편차(△E) 1.0 이하, 더 바람직하게는 0.5 이하가 되도록 조절하기 위해 첨가되는 것으로 TiO2 등이 사용된다.At this time, the CR-PET single layer 10 is composed of 70-90% by weight of CR-PET and 10-30% by weight of a pigment, and the pigment has a color deviation (ΔE) of 1.0 or less, more preferably 0.5 or less. TiO 2 and the like are used to be added to adjust the temperature.

한편, 본 발명에 따른 화학적 재생 폴리에틸렌테레프탈레이트 수지를 포함한 친환경 데코레이션 시트는 도 3의 예시와 같이, MR-PET 중앙층(20), 상기 MR-PET 중앙층(20)을 기준으로 상하에 각각 CR-PET이 배치되게 재생수지를 복합하여 티-다이(T-Die) 압출 방식을 통해 다층 구조로 제조된다.On the other hand, the eco-friendly decoration sheet including the chemically regenerated polyethylene terephthalate resin according to the present invention, as shown in the example of FIG. - It is manufactured in a multi-layered structure through a T-Die extrusion method by combining recycled resin so that PET is placed.

즉, 본 발명에 따른 데코시트는 MR-PET 중앙층(20), 상기 MR-PET 중앙층(20)의 상면을 이루는 CR-PET 상부층(30), 상기 MR-PET 중앙층(20)의 하면을 이루는 CR-PET 하부층(40)의 3층 구조를 가질 수 있다.That is, the decorative sheet according to the present invention includes the MR-PET central layer 20, the CR-PET upper layer 30 constituting the upper surface of the MR-PET central layer 20, and the lower surface of the MR-PET central layer 20 It may have a three-layer structure of the CR-PET lower layer 40 constituting.

이때, 상기 데코시트를 이루는 재생 PET(MR-PET 및 CR-PET)은 총합이 70-90중량%, 각 층에 함유되는 안료의 총합은 10-30중량%가 되게 하되, MR-PET 중앙층(20) 뿐만 아니라 CR-PET 상부층(30), CR-PET 하부층(40)에도 반드시 안료 투입이 이루어져야 한다.At this time, the total amount of recycled PET (MR-PET and CR-PET) constituting the decorative sheet is 70-90% by weight, and the total amount of pigments contained in each layer is 10-30% by weight, but the MR-PET center layer (20), as well as the CR-PET upper layer 30 and the CR-PET lower layer 40, the pigment must be added without fail.

이는 CR-PET이 MR-PET 보다 명도(lightness)가 높고 황색도(yellowness)가 낮기 때문에 CR-PET층에 안료가 투입되어야 색상 조절이 더 용이하며, 특히 '백색(White)' 등 명도가 높고 황색도가 낮은 계열의 색상에 대하여 원하는 색상의 구현이 가능하기 때문이다. This is because CR-PET has higher lightness and lower yellowness than MR-PET, so color control is easier when pigments are added to the CR-PET layer. This is because a desired color can be realized for a color having a low yellowness.

이렇게 구성하게 되면 재생 PET을 재활용하는 비율을 70% 이상으로 유지할 수 있어 정부 시책에도 부응하면서 높은 재활용율을 확보할 수 있게 된다.With this configuration, the recycling rate of recycled PET can be maintained at 70% or more, and a high recycling rate can be secured while meeting government policies.

다른 한편, 도 4의 예시와 같이, 도 3의 기본 구조에 기능성 코팅층을 더 구현하여 데코시트의 내스크래치성, 내오염성, 부착성 등을 더욱 높일 수 있다.On the other hand, as shown in the example of FIG. 4, a functional coating layer may be further implemented in the basic structure of FIG. 3 to further enhance scratch resistance, stain resistance, adhesion, and the like of the decorative sheet.

예컨대, MR-PET 중앙층(20), 상기 MR-PET 중앙층(20)의 상면을 이루는 CR-PET 상부층(30), 상기 MR-PET 중앙층(20)의 하면을 이루는 CR-PET 하부층(40)의 3층 구조에서 CR-PET 상부층(30) 위에 상부 프라이머층(32)을 더 형성하고, CR-PET 하부층(40) 아래에 하부 프라이머층(42)을 더 형성하며, 상부 프라이머층(32) 위에는 기능성 코팅층(50)을 더 형성할 수 있다.For example, the MR-PET central layer 20, the upper CR-PET layer 30 forming the upper surface of the MR-PET central layer 20, and the lower CR-PET layer forming the lower surface of the MR-PET central layer 20 ( 40), an upper primer layer 32 is further formed on the CR-PET upper layer 30, a lower primer layer 42 is further formed under the CR-PET lower layer 40, and an upper primer layer ( 32), a functional coating layer 50 may be further formed thereon.

이 경우, 기능성 코팅층(50)은 UV 또는 열경화 코팅층이 될 수 있다.In this case, the functional coating layer 50 may be a UV or thermal curing coating layer.

또한, 상부 프라이머층(32)을 형성하는 이유는 CR-PET의 경우 MR-PET와 동일한 APET이기 때문에 수지내 글리콜 성분을 포함하고 있지 않다. 이로 인해 표면쪽에 기능성 코팅층(50)을 형성할 때 수지의 부착력이 확보되지 않아 코팅수지가 박리되는 문제가 유발되므로 이를 방지하기 위함이다.In addition, the reason for forming the upper primer layer 32 is that CR-PET is the same APET as MR-PET, so it does not contain a glycol component in the resin. Due to this, when the functional coating layer 50 is formed on the surface side, the adhesion of the resin is not secured, which causes a problem in which the coating resin is peeled off. This is to prevent this.

그리고, 하부 프라이머층(42)을 형성하는 이유 또한 마찬가지로서 프라이머 코팅을 통해 가구표면재로 적용시 시트와 MDF와의 부착력을 강화할 수 있다.Also, the reason why the lower primer layer 42 is formed is the same, and adhesion between the sheet and MDF can be enhanced when applied as a furniture surface material through primer coating.

여기에서, 각 프라이머층을 구성하는 수지는 우레탄계 혹은 아크릴계 수지가 될 수 있다.Here, the resin constituting each primer layer may be a urethane-based or acrylic-based resin.

10: CR-PET 단일층
20: MR-PET 중앙층
30: CR-PET 상부층
40: CR-PET 하부층
50: 기능성 코팅층10: CR-PET monolayer
20: MR-PET central layer
30: CR-PET upper layer
40: CR-PET lower layer
50: functional coating layer

Claims (6)

재생PET 중에서 해중합된 재생PET인 CR-PET(Chemical Recycle-PET)만 포함하는 CR-PET 단일층(10)으로 압출성형되고;
상기 CR-PET 단일층(10)은 CR-PET 70-90중량%와, 안료 10-30중량%로 이루어져 색상 편차(△E) 0.5 이하를 유지하는 것을 특징으로 하는 화학적 재생 폴리에틸렌테레프탈레이트 수지를 포함한 친환경 데코레이션 시트.It is extruded into a CR-PET single layer 10 containing only CR-PET (Chemical Recycle-PET), which is a recycled PET depolymerized among recycled PET;
The CR-PET single layer 10 is a chemically regenerated polyethylene terephthalate resin, which is composed of 70-90% by weight of CR-PET and 10-30% by weight of pigment and maintains a color deviation (ΔE) of 0.5 or less. Including eco-friendly decoration sheet. 재생PET인 MR-PET(Mechanical Recycle-PET)으로만 이루어진 MR-PET 중앙층(20);
상기 MR-PET 중앙층(20)의 상면을 이루도록 해중합된 재생PET인 CR-PET(Chemical Recycle-PET)으로만 구성된 CR-PET 상부층(30);
상기 MR-PET 중앙층(20)의 하면을 이루도록 상기 CR-PET 상부층(30)과 동일한 성분으로 구성된 CR-PET 하부층(40);의 3층 구조를 갖도록 티-다이를 통해 압출성형된 화학적 재생 폴리에틸렌테레프탈레이트 수지를 포함한 친환경 데코레이션 시트.An MR-PET central layer 20 made of only recycled PET, MR-PET (Mechanical Recycle-PET);
a CR-PET upper layer 30 composed only of CR-PET (Chemical Recycle-PET), which is a recycled PET depolymerized to form an upper surface of the MR-PET central layer 20;
Chemical regeneration extruded through a T-die to have a three-layer structure of a CR-PET lower layer 40 composed of the same components as the CR-PET upper layer 30 to form the lower surface of the MR-PET central layer 20 Eco-friendly decoration sheet containing polyethylene terephthalate resin. 제2항에 있어서,
상기 데코레이션시트를 이루는 재생 PET인 MR-PET과 CR-PET의 총합은 70-90중량%, 각 층에 함유되는 안료의 총합은 10-30중량%가 되게 하되, MR-PET 중앙층(20) 뿐만 아니라 CR-PET 상부층(30)과 CR-PET 하부층(40)에도 반드시 안료가 투입되어 색상 편차(△E) 1.0 이하를 유지하는 것을 특징으로 하는 화학적 재생 폴리에틸렌테레프탈레이트 수지를 포함한 친환경 데코레이션 시트.According to claim 2,
The total of MR-PET and CR-PET, which are recycled PET constituting the decoration sheet, is 70-90% by weight, and the total amount of pigments contained in each layer is 10-30% by weight, but the MR-PET central layer (20) In addition, environmentally friendly decoration sheets including chemically regenerated polyethylene terephthalate resin, characterized in that pigments are necessarily added to the CR-PET upper layer 30 and the CR-PET lower layer 40 to maintain a color deviation (ΔE) of 1.0 or less. 제3항에 있어서,
상기 CR-PET 상부층(30) 위에는 상부 프라이머층(32)을 더 형성하고, 상기 CR-PET 하부층(40) 아래에는 하부 프라이머층(42)을 더 형성하며, 상기 상부 프라이머층(32) 위에는 기능성 코팅층(50)을 더 형성한 것을 특징으로 하는 화학적 재생 폴리에틸렌테레프탈레이트 수지를 포함한 친환경 데코레이션 시트.According to claim 3,
An upper primer layer 32 is further formed on the upper CR-PET layer 30, and a lower primer layer 42 is further formed under the lower CR-PET layer 40, and a functional functional layer 42 is further formed on the upper primer layer 32. Eco-friendly decoration sheet including a chemically regenerated polyethylene terephthalate resin, characterized in that the coating layer 50 is further formed. 제4항에 있어서,
상기 상부 프라이머층(32)과 하부 프라이머층(42)은 우레탄계 혹은 아크릴계 수지로 형성되는 것을 특징으로 하는 화학적 재생 폴리에틸렌테레프탈레이트 수지를 포함한 친환경 데코레이션 시트.According to claim 4,
The upper primer layer 32 and the lower primer layer 42 are eco-friendly decoration sheet containing a chemically regenerated polyethylene terephthalate resin, characterized in that formed of a urethane-based or acrylic resin. 제4항에 있어서,
상기 기능성 코팅층(50)은 UV 또는 열경화 코팅층인 것을 특징으로 하는 화학적 재생 폴리에틸렌테레프탈레이트 수지를 포함한 친환경 데코레이션 시트.According to claim 4,
The functional coating layer 50 is an eco-friendly decoration sheet including a chemically regenerated polyethylene terephthalate resin, characterized in that the UV or thermal curing coating layer.
KR1020220043189A 2022-04-07 2022-04-07 Eco-friendly decoration sheet containing chemically recycled polyethylene terephthalate resin KR102470342B1 (en)

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