KR100855212B1 - The embossing method of the biodegradable resins sheet - Google Patents

The embossing method of the biodegradable resins sheet Download PDF

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KR100855212B1
KR100855212B1 KR1020080041840A KR20080041840A KR100855212B1 KR 100855212 B1 KR100855212 B1 KR 100855212B1 KR 1020080041840 A KR1020080041840 A KR 1020080041840A KR 20080041840 A KR20080041840 A KR 20080041840A KR 100855212 B1 KR100855212 B1 KR 100855212B1
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embossing
biodegradable resin
acid
sheet
emboss
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KR1020080041840A
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Korean (ko)
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김진환
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주식회사화인인더스트리
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/022—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing characterised by the disposition or the configuration, e.g. dimensions, of the embossments or the shaping tools therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • B05D7/04—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber to surfaces of films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0059—Degradable
    • B29K2995/006—Bio-degradable, e.g. bioabsorbable, bioresorbable or bioerodible

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Biological Depolymerization Polymers (AREA)
  • Laminated Bodies (AREA)

Abstract

A method for embossing biodegradable resin sheets is provided to achieve superior organic solvent resistance and facilitate an embossing process. A method for embossing biodegradable resin sheets comprises a step of coating a mixture, which is obtained by adding aziridine of 5wt% to 40wt% to hydrogenous ink having no well-known pigment, on a biodegradable resin sheet(1) to form a primer layer. The biodegradable resin sheet is made of PLA(Poly Lactic Acid), PGA(Poly Glycolic Acid), PCL(Poly Caprolactone), fatty polyester resin, PHB(Poly Hydroxyl Butyric acid) or D-3-hydroxy butyric acid. The biodegradable resin sheet is subject to embossing by directly passing through an emboss(13) instead of passing through drum rollers. The emboss has the temperature of 50°C to 150°C and the pressure of 20kgf/cm2 to 60kgf/cm2. A front heater(12) has the temperature of 80°C to 200°C.

Description

생분해성 수지 시트의 엠보싱 가공 방법{The embossing method of the biodegradable resins sheet}The embossing method of the biodegradable resins sheet

본 발명은 생분해성 수지 시트의 엠보싱 가공 방법에 관한 것으로, 좀더 구체적으로는 폴리락트산(poly lactic acid, PLA), 폴리글리콜산(poly glycolic acid, PGA), 폴리카프로락톤(poly caprolactone, PCL), 지방족 폴리에스테르 수지, 폴리히드록시부틸산(poly hydroxy butyric acid, PHB) 또는 D-3-히드록시 부틸산(D-3-hydroxy butyric acid)을 주재료로 하는 생분해성 수지 시트 상에 공지의 안료가 제외된 수성잉크 중량에 대하여 아지리딘(aziridine)을 5 ∼ 40중량% 첨가하여 혼합한 혼합물을 무광 코팅의 프라이머층으로 도포한 다음, 시트를 드럼롤러를 통과시키지 않고 엠보스로 직접 통과시켜 엠보싱을 행하되 엠보스의 온도는 50 ∼ 150℃, 엠보스의 압력 20 ∼ 60㎏f/㎠, 전면 히터의 온도는 80 ∼ 200℃의 복사열 조건으로 행함으로써 형성된 엠보가 손실되거나 손상되지 않고, 크랙이 발생하지 않으면서 용이하게 엠보싱 가공을 행할 수 있는 생분해성 수지 시트의 엠보싱 가공 방법에 관한 것이다.The present invention relates to a method for embossing a biodegradable resin sheet, more specifically, polylactic acid (PLA), polyglycolic acid (poly glycolic acid, PGA), polycaprolactone (poly caprolactone, PCL), Known pigments are formed on a biodegradable resin sheet mainly composed of an aliphatic polyester resin, poly hydroxy butyric acid (PHB) or D-3-hydroxy butyric acid. 5-40% by weight of aziridine was added to the removed aqueous ink, and the mixed mixture was applied with a primer layer of a matte coating, and then embossed by passing the sheet directly through an emboss without passing through a drum roller. The embossing formed by the embossing temperature is 50-150 ° C, the embossing pressure 20-60kgf / cm2, and the front heater temperature is 80-200 ° C under radiant heat conditions. Standing can easily be embossed do not relate to the embossing process of the biodegradable resin sheet.

일반적으로 화석 연료인 석탄, 석유, 천연가스 등의 원료를 인공적으로 합성시켜 얻어진 고분자 화합물인 합성수지는 가공성, 강도, 경도, 내식성, 내후성, 내수성, 내구성 등의 특성이 있고 착색이 자유롭고 색상 또한 미려하여 다양한 분야에서 널리 사용되고 있다.In general, synthetic resins, which are polymer compounds obtained by artificially synthesizing raw materials such as coal, petroleum, and natural gas, which are fossil fuels, have characteristics such as processability, strength, hardness, corrosion resistance, weather resistance, water resistance, and durability, and are free of coloring and beautiful in color. It is widely used in various fields.

그러나, 상기와 같은 우수한 특성에도 불구하고, 자연상태에서 분해되지 않아 이들이 적용된 각종 제품의 폐기처리시 심각한 환경오염을 일으키는 문제와, 화석연료의 고갈로 인하여 선진국을 중심으로 국제적인 규제를 통해 그 사용량을 점차적으로 줄이거나 제한하고 있는 추세이며, 우선적으로 일부 제품에 한하여는 수출입을 금지하고 있고, 또한 고유가로 인한 합성수지 원료의 가격상승으로 합성수지를 대체할 수 있는 소재의 개발이 시급한 실정이다.However, in spite of the above excellent characteristics, it is not decomposed in the natural state and causes serious environmental pollution in the disposal of various products to which they are applied, and due to the depletion of fossil fuel, It is gradually decreasing or restricting. First of all, some products are prohibited from import and export, and it is urgent to develop materials that can replace synthetic resins due to the price increase of synthetic resin raw materials due to high oil prices.

상기한 문제점을 가지는 화석연료를 원료로 하여 제조되는 고분자 합성수지를 대체할 소재로는 주변에서 쉽게 얻을 수 있는 각종 곡물을 이용한 생분해성 합성수지가 있으며, 폴리락트산(poly lactic acid, PLA), 폴리글리콜산(poly glycolic acid, PGA), 폴리카프로락톤(poly caprolactone, PCL), 지방족 폴리에스테르 수지, 폴리히드록시부틸산(poly hydroxy butyric acid, PHB) 또는 D-3-히드록시 부틸산(D-3-hydroxy butyric acid) 등과 같은 다양한 생분해성 합성수지의 개발이 이루어고 있다.As a material to replace the polymer synthetic resin produced by using fossil fuel having the above problems, there is a biodegradable synthetic resin using various grains which can be easily obtained from the surrounding, polylactic acid (PLA), polyglycolic acid (poly glycolic acid, PGA), poly caprolactone (PCL), aliphatic polyester resin, poly hydroxy butyric acid (PHB) or D-3-hydroxy butyl acid (D-3- Various biodegradable resins such as hydroxy butyric acid) have been developed.

한편, 치수안정성, 내후성, 내약품성, 표면광택성, 내스크래치성, 가공의 용이함으로 인하여 마킹시트, 인테리어시트, 데코레이션시트, 간판, 실내외장식시트 등과 같은 각종 시트가 많이 사용되고 있다.On the other hand, due to dimensional stability, weather resistance, chemical resistance, surface gloss, scratch resistance, ease of processing, various sheets such as marking sheets, interior sheets, decoration sheets, signboards, interior decoration sheets, etc. are used a lot.

그러나, 상기의 각종 시트들은 여러 가지 문제점을 가지고 있는 합성수지로 제조되고 있고, 최근에 환경 오염 문제가 대두되면서 친환경 소재의 사용이 각광을 받고 있는 추세이다.However, the various sheets described above are made of synthetic resins having various problems, and recently, the use of eco-friendly materials is in the spotlight as environmental pollution problems arise.

특히, 많은 용도로 사용되고 있는 염화비닐시트는 소각시 다량의 다이옥신을 방출한다. 이와 같은 다이옥신은, 92년 세계보건기구(who)에 의해 유전 가능한 1급 발암물질로 규정됐고 세계야생보호기금(wwf)에 의해 확실한 환경호르몬으로 분류된 물질로서, 보통 염소나 브롬을 함유하는 산업공정에서 화학적인 오염물로서 생성되고, 또 염소가 들어있는 화합물을 태울 때 생긴다. 이와 같은 다이옥신은 화학적으로 안정돼 있어 분해되거나 다른 물질과 쉽게 결합되지 않아 자연적으로 사라지지 않으며, 물에 잘 녹지 않는 성질이 있어서 소변이나 배설물로는 잘 빠져나가지 않으며, 반면 지방에는 잘 녹기 때문에 사람이나 동물의 지방조직에 자꾸만 쌓이게 되고, 소량을 섭취하더라도 인체에 축적돼 치명적인 결과를 낳는 무색의 발암물질로서 청산가리의 만배, 사카린의 천배의 독성을 가진 것으로 지금까지의 조사결과 밝혀졌다.In particular, the vinyl chloride sheet used in many applications releases a large amount of dioxins upon incineration. Such dioxin is a class 1 carcinogen that can be inherited by the World Health Organization (WHO) in 1992, and is classified as a reliable environmental hormone by the World Wildlife Fund (wwf). Produced as chemical contaminants in the process and occurs when burning compounds containing chlorine. These dioxins are chemically stable and do not break down naturally because they are not easily broken down or combined with other substances.They do not dissolve well in water, so they do not escape well in urine or feces. It is a colorless carcinogen that accumulates continuously in the animal's adipose tissue, and even if a small amount is ingested, has a toxic effect of 10,000 times of cyanide and 1,000 times of saccharin.

따라서, 전분이나 RUBBER 등을 이용하는 시트, 아크릴 수지, 알콜시실란계, 무기질폴리머, EPS(Expanded Polystyrene)을 이용하는 시트, 폴리비닐 부티랄 수지, 폴리비닐 아세탈 수지, PETG(Glycol-modified PET: Copolyesters), PBT(Poly Butylene Terephthalate), ABS(Acrylonitrile Butadiene Styrene), LCP(Liquid Crystalline Polymer), DMN(Dimethylnaphthalene), POM(Polyoxymethylene), PMMA(Polymethylmetacrylate), PPO(Polyphenylene Oxide), PPE(Polyphenylene Ether), PAR(Polyarylate), PEEK(Polyehteretherketone) 등을 사용하는 시트가 사용되고 있지만, 최근에는 PLA(Polylactic acid), HA(Hyaluronic acid), PHB(Polyhydroxybutyric acid), PHV(Polyhydroxy valerate), PVA(Polyvinyl alcohol), PHA(Polyhydroxyalkanoate), 폴리하이드록시옥타노에이트(Polyhydroxyoctanoate), 폴리에틸렌 숙시네이트(Polyethylene succinate), 폴리부틸렌 숙시네이트(Polybutylene succinate), 폴리부틸렌 아디파이트(Polybutylene adipate), 폴리부틸렌 카보네이트(Polybutylene carbonate), 폴리카프로락톤(Polycaprolactone), 폴리테트라메틸렌 아디파이트(Polytetramethylene adipate), 폴리테트라메틸렌 테레프탈레이트(Polytetramethylene terephthalate), 폴리에틸렌 테레프탈레이트(Polyethylene terephthalate) 등과 같은 생분해성수지로 된 시트가 환경오염방지, 폐기처리문제, 경량, 강도와 경제성에서는 우수하여 광범위하게 사용되고 있다.Therefore, sheets using starch or rubber, acrylic resins, alcoholic silanes, inorganic polymers, sheets using EPS (Expanded Polystyrene), polyvinyl butyral resins, polyvinyl acetal resins, PETG (Glycol-modified PET: Copolyesters) Poly Butylene Terephthalate (PBT), Acrylonitrile Butadiene Styrene (ABS), Liquid Crystalline Polymer (LCP), Dimethylnaphthalene (DMN), Polyoxymethylene (POM), Polymethylmetacrylate (PMMA), Polyphenylene Oxide (PPO), Polyphenylene Ether (PPE), PAR (Polyarylate), PEEK (Polyehteretherketone), etc. Sheets are used, but recently, PLA (Polylactic acid), HA (Hyaluronic acid), PHB (Polyhydroxybutyric acid), PHV (Polyhydroxy valerate), PVA (Polyvinyl alcohol), PHA (Polyhydroxyalkanoate), Polyhydroxyoctanoate (Polyhydroxyoctanoate), Polyethylene succinate, Polybutylene succinate, Polybutylene adipate, Sheets made of biodegradable resins such as polybutylene carbonate, polycaprolactone, polytetramethylene adipate, polytetramethylene terephthalate, polyethylene terephthalate, etc. It is widely used for environmental pollution prevention, waste disposal problem, light weight, strength and economy.

그러나, 폴리락트산, 폴리글리콜산, 폴리카프로락톤, 지방족 폴리에스테르 수지, 폴리히드록시부틸산 또는 D-3-히드록시 부틸산과 같은 생분해성 합성수지는 인성 및 신도가 불량하고, 접착성이 좋지 않아 엠보싱 가공이 용이하지 못하고, 형성된 엠보도 손실되거나 손상되는 경향이 많고, 크랙이 많이 발생하는 단점이 있었다.However, biodegradable synthetic resins, such as polylactic acid, polyglycolic acid, polycaprolactone, aliphatic polyester resins, polyhydroxybutyl acid or D-3-hydroxy butyric acid, have poor toughness and elongation, and are poor in adhesion and embossed. Machining is not easy, the embossed formed also tends to be lost or damaged, and many cracks were generated.

따라서, 본 발명의 목적은 형성된 엠보가 손실되거나 손상되지 않고, 크랙이 발생하지 않고, 내용제성이 우수하며, 엠보싱 가공이 용이한 생분해성 수지 시트의 엠보싱 가공 방법을 제공하는 데 있다.It is therefore an object of the present invention to provide a method for embossing a biodegradable resin sheet in which the formed embossing is not lost or damaged, no cracks are generated, the solvent resistance is excellent, and the embossing is easy.

상기 목적 뿐만 아니라 용이하게 표출되는 다른 목적을 달성하기 위하여 본 발명에서는 폴리락트산(poly lactic acid, PLA), 폴리글리콜산(poly glycolic acid, PGA), 폴리카프로락톤(poly caprolactone, PCL), 지방족 폴리에스테르 수지, 폴리히드록시부틸산(poly hydroxy butyric acid, PHB) 또는 D-3-히드록시 부틸산(D-3-hydroxy butyric acid)을 주재료로 하는 생분해성 수지 시트 상에 공지의 안료가 제외된 수성잉크 중량에 대하여 아지리딘(aziridine)을 5 ∼ 40중량% 첨가하여 혼합한 혼합물을 무광 코팅의 프라이머층으로 도포한 다음, 시트를 드럼롤러를 통과시키지 않고 엠보스로 직접 통과시켜 엠보싱을 행하되 엠보스의 온도는 50 ∼ 150℃, 엠보스의 압력 20 ∼ 60㎏f/㎠, 전면 히터의 온도는 80 ∼ 200℃의 복사열 조건으로 행함으로써 형성된 엠보가 손실되거나 손상되지 않고, 크랙이 발생하지 않으면서 용이하게 엠보싱 가공을 행할 수 있었다.In order to achieve the above object as well as other objects that are easily expressed in the present invention, polylactic acid (PLA), polyglycolic acid (poly glycolic acid, PGA), polycaprolactone (poly caprolactone (PCL), aliphatic poly The well-known pigment is excluded on the biodegradable resin sheet mainly composed of ester resin, poly hydroxy butyric acid (PHB) or D-3-hydroxy butyric acid. 5-40% by weight of aziridine was added to the aqueous ink, and the mixed mixture was applied with a primer layer of a matte coating. Then, the sheet was embossed by directly passing through an emboss without passing through a drum roller. The temperature of 50-150 degreeC, the embossing pressure of 20-60 kgf / cm <2>, the temperature of the front heater are 80-200 degreeC radiant heat conditions, and the embossing formed is not lost or damaged, and a crack occurs. The embossing process was able to be performed easily, without doing it.

본 발명에 따른 생분해성 수지 시트의 엠보싱 가공 방법은 형성된 엠보가 손실되거나 손상되지 않고, 크랙이 발생하지 않고, 내용제성이 우수하며, 용이하게 엠보싱 가공을 행할 수 있는 효과가 있었다.The embossing processing method of the biodegradable resin sheet according to the present invention has the effect that the embossing formed is not lost or damaged, no cracks are generated, the solvent resistance is excellent, and the embossing can be easily performed.

본 발명에 따른 생분해성 수지 시트의 엠보싱 가공 방법은 폴리락트산, 폴리글리콜산, 폴리카프로락톤, 지방족 폴리에스테르 수지, 폴리히드록시부틸산 또는 D-3-히드록시 부틸산을 주재료로 하는 생분해성 수지 시트(1) 상에 공지의 안료가 제외된 수성잉크 중량에 대하여 아지리딘(aziridine)을 5 ∼ 40중량% 첨가하여 혼합한 혼합물을 무광 코팅의 프라이머층으로 도포한 다음, 시트(1)를 드럼롤러(10)를 통과시키지 않고 엠보스(13)로 직접 통과시켜 엠보싱을 행하되 엠보스(13)의 온도는 50 ∼ 150℃, 엠보스(13)의 압력 20 ∼ 60㎏f/㎠, 전면 히터(12)의 온도는 80 ∼ 200℃의 복사열 조건으로 행하는 것으로 특징지워진다.The embossing processing method of the biodegradable resin sheet according to the present invention is a biodegradable resin mainly composed of polylactic acid, polyglycolic acid, polycaprolactone, aliphatic polyester resin, polyhydroxybutyl acid or D-3-hydroxybutyl acid. A mixture of 5 to 40% by weight of aziridine was added based on the weight of the aqueous ink excluding a known pigment on the sheet 1, and the mixed mixture was applied with a primer layer of a matte coating, and then the sheet 1 was drummed. Embossing is carried out by passing directly through the embossing 13 without passing the roller 10. The temperature of the embossing 13 is 50 to 150 캜, the pressure of the embossing 13 to 20 kgf / cm2, and the front heater. The temperature of (12) is characterized by performing under radiant heat conditions of 80 to 200 ° C.

본 발명에서 사용되는 생분해성 수지는 폴리락트산, 폴리글리콜산, 폴리카프로락톤, 지방족 폴리에스테르 수지, 폴리히드록시부틸산 및 D-3-히드록시 부틸산 으로 구성되는 군으로부터 선택된 1 종 또는 2 종 이상의 혼합물이고, 폴리락트산을 사용할 경우 특히 바람직하다.The biodegradable resin used in the present invention is one or two selected from the group consisting of polylactic acid, polyglycolic acid, polycaprolactone, aliphatic polyester resin, polyhydroxybutyl acid and D-3-hydroxy butyl acid. It is especially preferable when using a mixture of the above and using a polylactic acid.

폴리락트산은 범용 플라스틱 수지인 폴리에틸렌테레프탈레이트(polyethyleneterephtalate, PET)와 비교하여 인장 탄성계수는 거의 유사한 정도로 나타나고, 굽힘 강성이 우수하며, 융점이 171℃로 다른 생분해성 수지에 비해 높은 편이지만 충격강도가 낮으며, 대기 중에서 수분을 쉽게 흡수하여 빠르게 산화되는 특징을 가지고 있다.Polylactic acid has a tensile modulus of elasticity similar to that of polyethylene terephthalate (PET), a general-purpose plastic resin, has excellent bending rigidity, and has a melting point of 171 ° C, which is higher than other biodegradable resins, but has an impact strength. It is low and easily absorbs moisture from the air and oxidizes quickly.

본 발명에서는 사용되는 생분해성 수지의 인성과 신도가 불량한 단점을 해결하기 위하여 프라이머층을 형성하여 엠보싱을 행함으로써 생성되는 엠보가 손실되거나 손상되지 않고, 크랙이 발생하지 않도록 하였다.In the present invention, in order to solve the disadvantage of poor toughness and elongation of the biodegradable resin used, the embossing formed by embossing by forming a primer layer is not lost or damaged, and cracks are not generated.

즉, 공지의 수성잉크 중에서 안료 성분이 제외된 수성잉크 중량에 대하여 아지리딘(aziridine)을 5 ∼ 40중량% 첨가하여 혼합한 혼합물을 프라이머층으로 도포하고 엠보싱 가공을 행하였다. 본 발명에서 수성잉크로는 공지의 모든 수성잉크가가 사용될 수 있으며, 수성 수지분산체, 안료, 물로 구성되는 주성분 중에서 안료를 제외한 것을 사용하고, 필요에 따라 기타 보조제로 소포제, 표면 개질제, 유화제, 가소제, 분산제를 사용할 수도 있다.That is, 5-40 weight% of aziridine was added with respect to the weight of the aqueous ink in which the pigment component was excluded from the known aqueous ink, The mixed mixture was apply | coated with the primer layer, and the embossing process was performed. In the present invention, the aqueous ink may be any known aqueous ink value, and may be used, except for pigments, among the main components consisting of aqueous resin dispersions, pigments, and water, and if necessary, other anti-foaming agents, surface modifiers, emulsifiers, Plasticizers and dispersants can also be used.

아지리딘은 무색으로 암모니아 냄새가 나는 연소되기 쉬운 액체로 화학식 (CH2)2NH, 분자량 43.1, 녹는점 －78 ℃, 끓는점 55 ~ 56 ℃이고, 물 및 유기용매에 잘 용해되며, 제2아민으로서의 성질을 나타내고, 불안정한 3원자 고리 구조 때문에 고리가 열리기 쉽고 반응성이 풍부하며. β-브롬에틸아민에 수산화칼륨을 작용시키면 얻을 수 있다.Aziridine is a colorless, flammable liquid with ammonia odor, chemical formula (CH 2 ) 2 NH, molecular weight 43.1, melting point -78 ℃, boiling point 55 ~ 56 ℃, soluble in water and organic solvents, secondary amine It is characterized by its unstable three-membered ring structure, which makes the ring open and reactive. It can be obtained by making potassium hydroxide act on (beta) -bromine ethylamine.

본 발명에서 아지리딘은 폴리락트산, 폴리글리콜산, 폴리카프로락톤, 지방족 폴리에스테르 수지, 폴리히드록시부틸산 또는 D-3-히드록시 부틸산과 같은 생분해성 수지의 기능기와 반응하여 시트 표면의 인성과 신도를 향상시켜 엠보싱 가공을 용이하게 만들 뿐만 아니라 형성된 엠보가 손실되거나 손상되지 않고, 크랙이 발생하지 않도록 하는 기능을 한다.In the present invention, aziridine reacts with functional groups of biodegradable resins such as polylactic acid, polyglycolic acid, polycaprolactone, aliphatic polyester resin, polyhydroxybutyl acid or D-3-hydroxybutyl acid, Elongation is enhanced to make embossing easier, as well as to prevent loss of or damage to the formed emboss, and to prevent cracking.

본 발명에서 수성잉크 중량에 대하여 아지리딘(aziridine)이 5 ∼ 40중량% 첨가되는 것이 바람직하며, 첨가량이 5중량% 미만일 경우에는 첨가 효과가 미약하여 엠보 생성이 만족스럽지 못한 단점이 있고, 40중량%를 초과할 경우에는 첨가 상승 효과가 없어 경제적이지 못할 뿐만 아니라 생분해성 수지를 열화시켜 시트의 내구성을 저하시키는 문제점이 있다.In the present invention, it is preferable that 5 to 40% by weight of aziridine is added based on the weight of the aqueous ink, and when the addition amount is less than 5% by weight, the addition effect is weak and there is a disadvantage in that the embossing is not satisfactory, and 40% by weight. When it exceeds%, there is a problem in that there is no synergistic effect of addition, which is not economical, and deteriorates the biodegradable resin, thereby lowering the durability of the sheet.

본 발명에서 프라이머 층 도포는 본 발명이 속하는 기술 분야에서 통상적으로 사용되는 코팅 방법, 예를 들어 스핀코팅, 잉크젯 프린팅, 롤프린팅, 딥 코팅 등과 같은 코팅 방법을 사용할 수 있으며, 프라이머 층은 시트지의 적어도 일면에 0.05 ∼ 0.2㎜의 두께로 행하는 것이 효과적이며, 코팅층 두께가 0.05㎜ 미만일 경우에는 코팅 효과의 발현 정도가 미약하여 엠보 생성이 만족스럽지 못하고, 0.2㎜를 초과할 경우에는 생분해성 수지 시트로서의 장점이 저하되는 단점이 있다.Application of the primer layer in the present invention may use a coating method commonly used in the art to which the present invention belongs, for example, a coating method such as spin coating, inkjet printing, roll printing, dip coating, etc., wherein the primer layer is formed of at least one sheet of sheet paper. It is effective to carry out with a thickness of 0.05 to 0.2 mm on one surface, and when the thickness of the coating layer is less than 0.05 mm, the degree of expression of the coating effect is weak and the embossing is not satisfactory, and when the thickness exceeds 0.2 mm, it is an advantage as a biodegradable resin sheet. This has the disadvantage of deteriorating.

상기와 같이 프라이머 층을 형성시킨 다음, 엠보싱을 행하되 시트를 드럼롤러(10)를 통과시키지 않고 엠보스(13)로 직접 통과시켜 엠보싱을 행하며, 엠보스(13)의 온도는 50 ∼ 150℃, 엠보스(13)의 압력 20 ∼ 60㎏f/㎠, 전면 히터(12)의 온도는 80 ∼ 200℃의 복사열 조건으로 행한다.After forming the primer layer as described above, the embossing is performed, but the sheet is passed directly through the emboss 13 without passing through the drum roller 10 to emboss, the temperature of the emboss 13 is 50 ~ 150 ℃, The pressure 20-60 kgf / cm <2> of the embossing 13 and the temperature of the front heater 12 are performed on 80-200 degreeC radiant heat conditions.

본 발명에 있어서 엠보싱 공정시 통상의 엠보싱 공정과 같이 드럼롤러(10)를 통과시키게 되면 코팅된 아지리딘이 실활되어 엠보싱 효과가 발현되지 않기 때문이다.In the present invention, when passing through the drum roller 10 as in the embossing process in the embossing process, the coated aziridine is inactivated, so that the embossing effect is not expressed.

엠보스(13)의 온도와 압력 및 전면 히터(12)의 온도가 상기 범주를 벗어날 경우에는 엠보가 형성되지 않거나 생분해성 수지의 시트가 열화되는 단점이 있다.If the temperature and pressure of the emboss 13 and the temperature of the front heater 12 is out of the above range there is a disadvantage that the emboss is not formed or the sheet of the biodegradable resin deteriorates.

다음의 실시예는 본 발명을 좀 더 구체적으로 설명하는 것이지만, 본 발명을 한정하는 것은 아니다.The following examples illustrate the invention in more detail, but do not limit the invention.

실시예Example 1 One

폴리락트산을 190℃로 가열하여 용융한 후, 이축연신압출기를 이용하여 190℃, 70kg/㎠ 으로 압출하여 평균두께 0.2㎜의 시트를 제조하였다.The polylactic acid was heated to 190 ° C. and melted, and then extruded at 190 ° C. and 70 kg / cm 2 using a twin-screw extruder to prepare a sheet having an average thickness of 0.2 mm.

실시예Example 2 2

실시예 1에서 제조된 시트에 안료가 배제된 수성잉크((주)경동실업의 제품명 KCW : 주된 성분은 셀룰로오스 유도체들과 불포화 카프로락톤계 중간체 폴리올을 아크릴레이트와 공중합한 수지를 주재로 하고, 내용제성, 내블로킹성이 우수한 HMDI(헥사메틸렌디이소시아네이트) 트리머 및 TDI Adduct 타입으로 이루어진 가교제가 첨가된 것)와 이에 아지리딘이 수성잉크에 대하여 20중량% 첨가된 혼합물을 딥 코팅 방법으로 코팅하여 0.5mm 두께의 프라이머층을 형성하고, 엠보스의 온도 100℃, 엠보스의 압력 40㎏f/㎠, 전면 히터의 온도 140℃를 유지하면서 시트를 드럼롤러를 통과시키지 않고 엠보스로 직접 통과시켜 엠보싱을 행하였다.Water-based ink without pigment in the sheet prepared in Example 1 (KKW Co., Ltd. product name KCW: The main component is mainly based on a resin obtained by copolymerizing cellulose derivatives and unsaturated caprolactone intermediate polyols with acrylates) HMDI (hexamethylene diisocyanate) trimer and TDI Adduct type with excellent crosslinking agent with good resistance to blocking, and aziridine-containing mixture of 20% by weight of aqueous ink are coated by dip coating method. An embossing was performed by forming a primer layer having a thickness of mm, passing the sheet directly through the emboss without passing the drum roller while maintaining the embossing temperature of 100 deg. C, the embossing pressure of 40 kgf / cm &lt; 2 &gt;, and the front heater's temperature of 140 deg. It was done.

대조군으로 프라이머층을 형성시키지 않은 것을 사용한 것을 제외하고는 상기와 동일한 방법으로 엠보싱 가공을 행하였다.Embossing was performed in the same manner as above except that the primer layer was not formed as a control.

엠보싱 가공이 완료된 시트를 드라이 오븐에 넣고 100℃에서 60분 동안 유지시킨 후, 엠보를 육안으로 관찰한 결과 및 대조군 시트는 밀착성이 없어 부풀어 오 르는 현상이 발생하였지만 실시예 2의 시트의 엠보에 손상이 없었으며, 실시예 2의 시트를 또 다시 영하 10℃의 냉동실에서 60분, 100℃의 드라이 오븐에서 60분 동안 유지시킨 후, 엠보를 육안으로 관찰 손상이 없음을 확인할 수 있었다.After the embossed sheet was placed in a dry oven and maintained at 100 ° C. for 60 minutes, the result of visual observation of the embossing and the control sheet swelled due to lack of adhesion, but the embossing of the sheet of Example 2 was damaged. After the sheet of Example 2 was again maintained for 60 minutes in the freezing chamber at minus 10 ℃, 60 minutes in a dry oven at 100 ℃, it was confirmed that there is no visible damage to the embossing.

도 1은 본 발명에 따른 생분해성 수지 시트의 엠보싱 가공 방법의 개략적인 모식도이다.BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic schematic diagram of the embossing process method of the biodegradable resin sheet which concerns on this invention.

* 도면의 주요 부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings

1. 생분해성 수지재 시트 10. 드럼롤러1. Biodegradable resin sheet 10. Drum roller

11. 상부 히터 12. 전면 히터11. Upper Heater 12. Front Heater

13. 엠보스 14. 고무롤러13. Emboss 14. Rubber Roller

15. 가이드 롤러15. Guide roller

Claims (1)

폴리락트산, 폴리글리콜산, 폴리카프로락톤, 지방족 폴리에스테르 수지, 폴리히드록시부틸산 또는 D-3-히드록시 부틸산을 주재료로 하는 생분해성 수지 시트(1) 상에 공지의 안료가 제외된 수성잉크 중량에 대하여 아지리딘(aziridine)을 5 ∼ 40중량% 첨가하여 혼합한 혼합물을 무광 코팅의 프라이머층으로 도포한 다음, 시트(1)를 드럼롤러(10)를 통과시키지 않고 엠보스(13)로 직접 통과시켜 엠보싱을 행하되 엠보스(13)의 온도는 50 ∼ 150℃, 엠보스(13)의 압력 20 ∼ 60㎏f/㎠, 전면 히터(12)의 온도는 80 ∼ 200℃의 복사열 조건으로 행하는 것을 특징으로 하는 생분해성 수지 시트의 엠보싱 가공 방법.Aqueous with no known pigment on the biodegradable resin sheet (1) containing polylactic acid, polyglycolic acid, polycaprolactone, aliphatic polyester resin, polyhydroxybutyl acid or D-3-hydroxybutyl acid as a main material A mixture of 5 to 40% by weight of aziridine was added to the ink weight, and the mixed mixture was coated with a primer layer of a matte coating, and then the sheet 1 was embossed without passing the drum roller 10. Embossing is carried out by directly passing through the furnace, but the temperature of the emboss 13 is 50 to 150 ° C., the pressure of the emboss 13 is 20 to 60 kgf / cm 2, and the temperature of the front heater 12 is 80 to 200 ° C. The embossing processing method of the biodegradable resin sheet characterized by the above-mentioned.
KR1020080041840A 2008-05-06 2008-05-06 The embossing method of the biodegradable resins sheet KR100855212B1 (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060017003A (en) * 2004-08-19 2006-02-23 김남평 Mulching vinyl making process agriculture nature for polylactic acid

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060017003A (en) * 2004-08-19 2006-02-23 김남평 Mulching vinyl making process agriculture nature for polylactic acid

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