KR100514623B1 - Polypropylene metalic sheet and method for preparing the same - Google Patents
Polypropylene metalic sheet and method for preparing the same Download PDFInfo
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- KR100514623B1 KR100514623B1 KR10-2003-0035948A KR20030035948A KR100514623B1 KR 100514623 B1 KR100514623 B1 KR 100514623B1 KR 20030035948 A KR20030035948 A KR 20030035948A KR 100514623 B1 KR100514623 B1 KR 100514623B1
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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
- B32B27/16—Layered products comprising a layer of synthetic resin specially treated, e.g. irradiated
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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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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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
- 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
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
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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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
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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
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
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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
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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Abstract
본 발명은 폴리프로필렌 금속시트 및 이의 제조방법에 관한 것으로, 캘린더에서 폴리프로필렌 반제품을 생산한 후 인쇄공정을 실시하고, 상지층과의 합지를 통해 인쇄층을 장기보전하여 제품을 고급화한 폴리프로필렌 금속시트 및 이의 제조방법에 관한 것이다.The present invention relates to a polypropylene metal sheet and a method of manufacturing the same, after producing a polypropylene semi-finished product in a calender, performing a printing process, and long-term preservation of the printing layer through lamination with the upper layer, thereby improving the product. It relates to a sheet and a method of manufacturing the same.
Description
본 발명은 폴리프로필렌 금속시트 및 이의 제조방법에 관한 것으로, 캘린더에서 폴리프로필렌 반제품을 생산한 후 인쇄공정을 실시하고, 상지층과의 합지를 통해 인쇄층을 장기보전하여 제품을 고급화한 폴리프로필렌 금속시트 및 이의 제조방법에 관한 것이다.The present invention relates to a polypropylene metal sheet and a method of manufacturing the same, after producing a polypropylene semi-finished product in a calender, performing a printing process, and long-term preservation of the printing layer through lamination with the upper layer, thereby improving the product. It relates to a sheet and a method of manufacturing the same.
PVC가 개발된 이래, 모든 가전제품 및 그외의 압출성형품으로 제조된 제품에는 PVC 소재가 사용되고 있다. PVC 소재는 가볍고 다양한 성형품을 제조할 수 있다는 장점이 있으나, 연소시에 클로라이드 가스를 발생하고 배압내?? 가소제 성분 함유로 인한 인체 유해성 등의 문제점이 지목되어 오고 있다. 이와 함께, 다양한 무늬 및 색상을 발현하기 위해 사용하는 페인트도 그 사용용도가 한정적이고 요구되는 소비자의 기호가 다양화됨에 따라 개발이 시급한 상황이다. 따라서, 탈 PVC화 및 탈 페인트화를 위해 다양한 연구가 실시되고 있다.Since the development of PVC, PVC materials have been used in all home appliances and other products made of extruded products. PVC material has the advantage of being able to manufacture a variety of lightweight and molded products, but it generates chloride gas during combustion and Problems such as human hazards due to the plasticizer component has been pointed out. In addition, the paint used to express various patterns and colors is urgently developed as the usage of the paint is limited and the preferences of consumers are diversified. Therefore, various studies have been conducted for de-PVCization and de-painting.
PVC 대체품으로 여겨지는 폴리프로필렌 금속시트의 경우, 종래에는 그라비아 인쇄방식에 의해 금속 디자인을 부여한 인쇄층 위에 열을 이용한 물리적 요철(엠보스)를 부여함으로써 질감 및 표면 입체감 등을 부여하고, 표면처리제로 코팅함으로써 내오염성 및 내마모성, 내후성 등을 부여하였다. 이러한 종래 금속시트는 표면의 금속 질감이나 내마모성이 상지를 합지한 제품에 비해 떨어지는 단점이 있다.In the case of polypropylene metal sheet, which is considered to be a PVC substitute, it gives a texture and surface three-dimensional effect by applying physical irregularities (emboss) using heat on the printing layer, which is conventionally given a metal design by a gravure printing method. The coating imparted stain resistance, abrasion resistance, weather resistance, and the like. Such a conventional metal sheet has a disadvantage in that the metal texture or wear resistance of the surface is lower than that of the laminated paper.
또한, 상지층과 금속잉크 인쇄층, 폴리프로필렌 하지층간의 접착이 금속 잉크에 함유된 알루미늄 분말의 영향으로 접착력 감소현상이 발생함에 따라, 완제품에 있어서 상기 현상으로 인해 일반 물성 불충족 현상이 발생하여 폴리프로필렌 금속시트의 개발에 한계가 있었다.In addition, as the adhesion between the upper limb layer, the metal ink print layer, and the polypropylene underlayer is reduced due to the influence of the aluminum powder contained in the metal ink, the phenomenon of general properties may be insufficient due to the phenomenon in the finished product. There was a limit to the development of polypropylene metal sheets.
그리고, 일반적인 종래 금속시트의 다른 제조방법에는, T-다이 압출공법에 의하여 반제품을 생산후 인쇄공정만을 실시하여 완제품을 생산하는 방법이 알려져 있는데, 이러한 종래 방법에 따르면 내오염성, 내마모성, 내후성 등의 물성이 열악한 문제가 있었다.In addition, another method of manufacturing a conventional conventional metal sheet is a method of producing a finished product by performing only a printing process after producing a semi-finished product by a T-die extrusion method, and according to such a conventional method, such as stain resistance, abrasion resistance, weather resistance, etc. There was a problem of poor physical properties.
한편, 한국 공개특허공보 제1998-21085호에는 전자 차폐효과를 갖는 시트와 그 제조방법이 기재되어 있는데, 상기 발명은 캘린더 가공으로 제조한 PVC 시트로 된 상·하지층 사이에 금속으로 코팅된 섬유로 짜여진 직물층을 포함하여 구성된 금속 시트로서, 현재 부각되고 있는 친환경적인 소재개발에 반하는 단점이 있고, 소재의 한계성 탈피가 불가능하였다.On the other hand, Korean Laid-Open Patent Publication No. 1998-21085 discloses a sheet having an electron shielding effect and a method of manufacturing the same. The present invention is a fiber coated with a metal between the upper and lower layers of the PVC sheet produced by calendering. As a metal sheet including a woven fabric layer, there is a disadvantage against the development of environmentally friendly materials, which is currently emerging, and it was impossible to escape the limitation of the material.
이에 본 발명자들은 종래기술의 내오염성, 내마모성, 내후성 등의 물성을 강화하고 금속의 입자감 및 입체감을 부각시킴으로써 종래기술의 제품과 차별화되는 금속시트를 얻기 위해 연구검토한 결과, 캘린더에서 생산한 폴리프로필렌 반제품에 금속잉크를 사용하여 인쇄후 유무색의 투명상지층을 합지하고, 엠보스 부여, 특수 표면처리제로 코팅하는 기술을 발명하였고, 이에 기초하여 본 발명을 완성하였다.Accordingly, the present inventors have studied and studied to obtain a metal sheet that is differentiated from the products of the prior art by reinforcing physical properties such as stain resistance, abrasion resistance, and weather resistance of the prior art and highlighting the metal grain and three-dimensional feeling, and thus, polypropylene produced in calender. After printing a semi-finished product using a metal ink, the present invention was invented a technique of laminating a colorless transparent image layer, applying embossing, and coating with a special surface treatment agent, based on which the present invention was completed.
따라서, 본 발명의 목적은 가전제품 시장의 탈 PVC화 및 탈 페인트화에 대응 다양한 광택 및 두께 재현성이 가능한 다양한 물리적 요구 물성의 실현으로써 금속시트 제품별 용도별 특화 및 고급화를 가능하게 하기 위해, 종래 폴리프로필렌 금속 시트에 있어서, 캘린더에서 생산된 폴리프로필렌 반제품에 금속잉크로 인쇄하여 준비된 인쇄층과 표면층을 합지함으로써 금속잉크의 금속칩이 갖는 자연스러운 질감 및 입체감, 내오염성, 내마모성, 내후성 등의 기능성을 부여한 폴리프로필렌 금속시트 및 이의 제조방법을 제공하는데 있다.Accordingly, an object of the present invention is to realize a variety of physical requirements physical properties capable of various gloss and thickness reproducibility corresponding to the de-PVC and the de-painting in the home appliance market, to enable the specialization and high-quality by the use of metal sheet products, conventional poly In the propylene metal sheet, the printing layer and the surface layer prepared by printing with a metal ink on a polypropylene semi-finished product produced in calender are laminated to impart the natural texture and three-dimensional appearance, contamination resistance, abrasion resistance, and weather resistance of the metal chip of the metal ink. To provide a polypropylene metal sheet and a method of manufacturing the same.
상기 목적을 달성하기 위한 본 발명에 따른 폴리프로필렌 금속시트는, 상부로부터 순차적으로, 특수 표면처리층, 투명상지층, 금속 인쇄층 및 캘린더링 폴리프로필렌 시트층으로 적층된 구성을 갖는다.Polypropylene metal sheet according to the present invention for achieving the above object, has a configuration laminated sequentially from the top, a special surface treatment layer, a transparent image layer, a metal printing layer and a calendaring polypropylene sheet layer.
상기 다른 목적을 달성하기 위한 본 발명에 따른 폴리프로필렌 금속시트의 제조방법은, 폴리프로필렌 또는 폴리에틸렌테레프탈레이트로 이루어진 유무색의 투명상지층상에 접착제층을 적층한 후, 아크릴 수지, 폴리우레탄 수지 및 폴리에스터 수지로 이루어진 군으로부터 선택된 특수 표면처리제로 코팅하여 표면층을 제조하는 단계; 캘린더 방식을 이용하여 폴리프로필렌 시트층을 제조하고 상부에 접착제층을 적층한 후, 그 상부에 금속 잉크로 인쇄하는 단계; 상기 표면층과 금속 인쇄층 사이에 접착제층을 적층시켜 합지하는 단계; 및 상기 폴리프로필렌 시트층의 하부에 프라이머층을 적층시키는 단계;를 포함한다.Method for producing a polypropylene metal sheet according to the present invention for achieving the above another object, after laminating an adhesive layer on a colorless transparent paper layer made of polypropylene or polyethylene terephthalate, acrylic resin, polyurethane resin and poly Preparing a surface layer by coating with a special surface treatment agent selected from the group consisting of ester resins; Preparing a polypropylene sheet layer using a calender method, laminating an adhesive layer on top, and then printing the same with a metal ink thereon; Laminating and laminating an adhesive layer between the surface layer and the metal printing layer; And laminating a primer layer under the polypropylene sheet layer.
이하, 본 발명을 첨부된 도면을 참조하면서 좀 더 구체적으로 설명한다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.
도 1 및 도 2는 본 발명에 따른 폴리프로필렌 금속시트의 일예를 나타낸다.1 and 2 show an example of a polypropylene metal sheet according to the present invention.
전술한 바와 같이, 본 발명에 따른 폴리프로필렌 금속시트는 도 1과 같이, 상부로부터 순차적으로, 특수 표면처리층(1), 투명상지층(2), 금속 인쇄층(4) 및 캘린더링 폴리프로필렌 시트층(5)으로 적층된 구성을 갖는다.As described above, the polypropylene metal sheet according to the present invention, as shown in Figure 1, sequentially from the top, the special surface treatment layer (1), the transparent image layer (2), the metal printing layer (4) and calendered polypropylene It has the structure laminated | stacked by the sheet layer 5.
본 발명에 따른 폴리프로필렌 금속시트를 구성하는 각각의 층 사이에는 접착제층(3)이 위치하는데, 상기 접착제층(3)은 10∼50%의 고형분 및 25℃에서 300∼5000cps의 점도를 갖는 난황변 폴리우레탄계 접착제층이다. 또한, 각 층사이에 접착제층(3)은 최대 20㎛의 두께로 도포되어 적층될 수 있으며, 도 2와 같이 접착력을 개선하기 위해 중복하여 적층될 수 있다. 또한 접착제층의 두께는 10∼20㎛가 바람직하다.An adhesive layer 3 is positioned between each layer constituting the polypropylene metal sheet according to the present invention, wherein the adhesive layer 3 has an egg having a solid content of 10 to 50% and a viscosity of 300 to 5000 cps at 25 ° C. It is a yellowing polyurethane adhesive layer. In addition, the adhesive layer (3) between each layer may be applied to be laminated with a thickness of up to 20㎛, and may be stacked in duplicate to improve the adhesive force as shown in FIG. Moreover, as for the thickness of an adhesive bond layer, 10-20 micrometers is preferable.
또한, 본 발명에 따른 폴리프로필렌 금속시트는 피착제에 대한 접착력을 증대시키기 위한 표면 접착층인 프라이머층(6)을 상기 캘린더링 폴리프로필렌 시트층의 하부에 더욱 포함하며, 상기 프라이머층(6)은 EVA(에틸렌 비닐아세테이트 공중합체), 폴리에스터 및 우레아 수지로 이루어진 군으로부터 적어도 하나이상 선택된다. 상기 표면 접착제층인 프라이머층은 최대 20㎛의 두께로 도포되어 적층될 수 있으며, 10∼20㎛가 바람직하다.In addition, the polypropylene metal sheet according to the present invention further includes a primer layer 6, which is a surface adhesive layer for increasing adhesion to the adherend, under the calendering polypropylene sheet layer, wherein the primer layer 6 is At least one selected from the group consisting of EVA (ethylene vinyl acetate copolymer), polyester and urea resin. The primer layer, which is the surface adhesive layer, may be applied and laminated with a thickness of up to 20 μm, and preferably 10 to 20 μm.
상기 특수 표면처리층(1)은 아크릴수지, 폴리우레탄 수지, 폴리에스터 수지로 이루어진 군으로부터 선택된 표면처리제로 코팅하여 얻은 층이며, 표면처리제의 코팅방법은 특별히 한정되지 않으나, 그라비어 인쇄방법, 콤마(comma) 코팅, 리버스 코팅 등의 방법을 사용할 수 있다. 또한, 상기 특수 표면처리층(1)의 두께는 5∼15㎛이며, 바람직하게는 10㎛이다.The special surface treatment layer (1) is a layer obtained by coating with a surface treatment agent selected from the group consisting of acrylic resins, polyurethane resins, polyester resins, the coating method of the surface treatment agent is not particularly limited, gravure printing method, comma ( comma) coating, reverse coating or the like can be used. The thickness of the special surface treatment layer 1 is 5 to 15 µm, and preferably 10 µm.
상기 투명상지층(2)은 폴리프로필렌 및 폴리에틸렌테레프탈레이트로 이루어진 군으로부터 선택된 수지이다. 상기 투명상지층(2)은 무색 투명층이거나, 유색 투명층(내부 안료 첨가형 필름 사용 또는 유색 투명잉크 코팅방식)일 수 있다. 상기 투명상지층(2)의 두께는 30∼50㎛이며, 바람직하게는 35∼45㎛이다.The transparent paper layer 2 is a resin selected from the group consisting of polypropylene and polyethylene terephthalate. The transparent paper layer 2 may be a colorless transparent layer or a colored transparent layer (using an internal pigment-added film or colored transparent ink coating method). The thickness of the transparent image paper layer 2 is 30-50 micrometers, Preferably it is 35-45 micrometers.
본 발명에 따른 금속 인쇄층(4)은 10∼100㎛의 평균 입자크기를 갖는 폴리우레탄 기초의 금속잉크로 인쇄된 층이다. 금속잉크의 인쇄방법은 특별히 한정되는 것이 아니나, 그라비어 인쇄방법, 콤마 코팅방법 또는 리버스 코팅방법 등에 의해 인쇄될 수 있다. 상기 금속잉크는 우레탄 기초의 점착력이 있는 유기물에 금속칩을 혼입한 잉크로 금속 인쇄층의 두께는 3∼10㎛가 바람직하다.The metal printed layer 4 according to the present invention is a layer printed with a polyurethane based metal ink having an average particle size of 10 to 100 µm. The printing method of the metal ink is not particularly limited, but may be printed by a gravure printing method, a comma coating method or a reverse coating method. The metal ink is an ink in which a metal chip is mixed into an urethane-based adhesive organic material, and the thickness of the metal printing layer is preferably 3 to 10 μm.
본 발명에 따른 캘린더링 폴리프로필렌 시트층(5)은 폴리프로필렌 수지를 캘린더 방식을 이용하여 필름 및 시트로 제조한 것이며, 캘린더링 폴리프로필렌 시트층(5)의 캘린더링 조건은 150℃ 이상에서 압출 및 압연을 거쳐 생산된다. 상기 캘린더링 폴리프로필렌 시트층(5)의 두께는 100∼200㎛가 바람직하다.The calendered polypropylene sheet layer 5 according to the present invention is made of a polypropylene resin into a film and a sheet using a calendering method, and the calendering conditions of the calendered polypropylene sheet layer 5 are extruded at 150 ° C. or higher. And produced by rolling. As for the thickness of the said calendering polypropylene sheet layer 5, 100-200 micrometers is preferable.
본 발명에 따른 폴리프로필렌 금속시트의 제조방법은, 첫째, 폴리프로필렌 또는 폴리에틸렌테레프탈레이트로 이루어진 유무색의 투명상지층(2)상에 접착제층(3)을 적층한 후, 아크릴 수지, 폴리우레탄 수지 및 폴리에스터 수지로 이루어진 군으로부터 선택된 특수 표면처리제(1)로 코팅하여 표면층을 제조하는 단계를 포함한다.In the method for producing a polypropylene metal sheet according to the present invention, first, after laminating the adhesive layer (3) on the colorless transparent paper layer (2) made of polypropylene or polyethylene terephthalate, acrylic resin, polyurethane resin And preparing a surface layer by coating with a special surface treatment agent (1) selected from the group consisting of polyester resins.
둘째, 캘린더 방식을 이용하여 폴리프로필렌 시트층을 제조하고 상부에 접착제층을 적층한 후, 그 상부에 금속 잉크로 인쇄하는 단계를 포함한다.Secondly, a polypropylene sheet layer is manufactured by calendering, and an adhesive layer is laminated on the upper side, and then printed on the upper side with a metal ink.
셋째, 준비된 상기 표면층과 금속 인쇄층 사이에 접착제층을 적층시켜 합지하는 단계를 포함한다. 상기 합지의 조건은 50∼100℃ 및 3∼5Kgf이다.Third, laminating an adhesive layer between the prepared surface layer and the metal printing layer to laminate. The conditions of the said paper are 50-100 degreeC, and 3-5 Kgf.
넷째, 상기 폴리프로필렌 시트층의 하부에 프라이머층을 적층시키는 단계를 포함한다.Fourth, laminating a primer layer on the lower portion of the polypropylene sheet layer.
또한 상기 인쇄 및 합지 공정후 50∼80℃에서 72∼96시간 동안 숙성단계를 거치게 된다.In addition, after the printing and laminating process is subjected to the aging step for 72 to 96 hours at 50 ~ 80 ℃.
상기 잉크 및 접착제의 건조 공정은 잉크와 접착제층이 0.7 ~ 3.0 m/sec 의 속도로 80 ~ 130 ℃ 의 오븐을 통과함으로써 수행되며, 잉크 및 접착제의 도포두께는 최대 20㎛까지 10∼20㎛이 바람직하다. 접착제는 중복하여 적층가능하며, 하나의 접착제층의 최대 두께가 최대 20㎛이다.The drying process of the ink and the adhesive is performed by passing the ink and the adhesive layer through an oven at 80 ~ 130 ℃ at a speed of 0.7 ~ 3.0 m / sec, the coating thickness of the ink and adhesive is up to 20㎛ 10 ~ 20㎛ desirable. The adhesives are stackable in duplicate and the maximum thickness of one adhesive layer is at most 20 μm.
본 발명에 따른 폴리프로필렌 금속시트의 효과는 폴리프로필렌 하지층에 금속잉크 인쇄 후 투명상지층을 합지함으로써 종래 금속시트보다 강한 내오염성, 내마모성, 내후성을 지님과 동시에, 금속의 입자감을 입체적으로 구현함으로써 제품의 품질 상승효과 등의 기능을 갖추었다.The effect of the polypropylene metal sheet according to the present invention has a stronger stain resistance, abrasion resistance, and weather resistance than the conventional metal sheet by laminating a transparent top layer after printing the metal ink on the polypropylene base layer, and at the same time by implementing a three-dimensional grain of the metal Equipped with functions such as product quality improvement effect.
또한 가전제품 시장의 탈 PVC화 및 탈 페인트화에 대응 다양한 광택 및 두께 재현성 가능등의 다양한 물리적 요구 물성의 실현으로써 금속시트 제품별 용도별 특화 및 고급화가 가능하다.In addition, in response to de-PVCization and de-painting in the home appliance market, various physical requirements such as various gloss and thickness reproducibility can be realized, thereby enabling specialization and high-quality by use of metal sheet products.
하기 실시예를 통해 본 발명을 좀 더 구체적으로 설명하지만 이에 본 발명의 범위가 한정되는 것은 아니다.The present invention will be described in more detail with reference to the following examples, but the scope of the present invention is not limited thereto.
실시예 1Example 1
폴리프로필렌으로 이루어진 무색의 투명상지층(2)상에 10%의 고형분 및 25℃에서 300cps의 점도를 갖는 난황변 폴리우레탄 접착제를 10㎛의 두께로 도포하여 접착제층(3)을 적층한 후, 아크릴 수지의 특수 표면처리제(1)로 코팅하여 표면층을 제조하였다. 이와 별도로, 150℃ 이상의 온도에서 압출 및 압연 공정의 조건하에서 캘린더 방식을 이용하여 폴리프로필렌 시트층을 제조하고 상부에 20%의 고형분 및 25℃에서 1000cps의 점도를 갖는 난황변 폴리우레탄 접착제를 15㎛의 두께로 접착제층을 적층한 후, 그 상부에 폴리우레탄 재질의 금속칩을 포함한 잉크를 그라비어 인쇄하여 인쇄층을 형성시켰다. 준비된 상기 표면층과 금속 인쇄층 사이에 10%의 고형분 및 25℃에서 800cps의 점도를 갖는 난황변 폴리우레탄 접착제를 10㎛의 두께로 접착제층을 적층시켜 70℃의 온도 및 4Kgf의 압력 조건하에서 합지하였다. 상기 폴리프로필렌 시트층의 하부에 프라이머층(EVA 계열)을 10㎛의 두께로 적층시켰다.After laminating an adhesive layer 3 by applying a thickness of 10 μm to a colorless transparent upper layer 2 made of polypropylene and having a 10% solid content and a viscosity of 300 cps at 25 ° C., The surface layer was prepared by coating with a special surface treatment agent (1) of acrylic resin. Separately, a polypropylene sheet layer was prepared by calendering under the conditions of the extrusion and rolling process at a temperature of 150 ° C. or higher, and a yellowed polyurethane adhesive having a solid content of 20% and a viscosity of 1000 cps at 25 ° C. was 15 μm. After laminating an adhesive layer to a thickness of, an ink including a metal chip of polyurethane material was gravure printed on the top to form a printed layer. A yellowed polyurethane adhesive having a solid content of 10% and a viscosity of 800 cps at 25 ° C. was laminated between the prepared surface layer and the metal printed layer at 10 μm in thickness to laminate an adhesive layer under a temperature of 70 ° C. and a pressure of 4 Kgf. . A primer layer (EVA series) was laminated to a thickness of 10 μm under the polypropylene sheet layer.
전술한 바와 같이, 본 발명에 따른 폴리프로필렌 금속시트는 종래 기술의 문제점을 해결하고, 우수한 내마모성, 내오염성 및 내후성을 가지며, 고급스럽고 특화된 금속질감을 표현할 수 있다.As described above, the polypropylene metal sheet according to the present invention solves the problems of the prior art, has excellent wear resistance, stain resistance and weather resistance, and can express a high-quality and specialized metal texture.
도 1은 본 발명에 따른 금속시트의 일예를 나타낸 도이다.1 is a view showing an example of a metal sheet according to the present invention.
도 2는 본 발명에 따른 금속시트의 다른 일예를 나타낸 도이다.2 is a view showing another example of a metal sheet according to the present invention.
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