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KOLON Engineering Plastic

Copolyester (K-1) for Clear Packing. KOLON Engineering Plastic. What is Copolyester ?. Polyester : Chain 구내조에 Ester Group( -COO- ) 을 갖는 Polymer 의 총칭 ex) PET, PEN, PBT 등

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KOLON Engineering Plastic

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  1. Copolyester (K-1) for Clear Packing KOLON Engineering Plastic

  2. What is Copolyester? Polyester :Chain 구내조에 Ester Group( -COO- )을 갖는 Polymer의 총칭ex) PET, PEN, PBT 등 Copolyester : ester group을 가지면서 두 종류 이상의 monomer로 이루어진 Polymer ex) NOPLA, K-1, PETG, PCTG 등 Copolyester의 특징 1) 통상적으로 PET계 Copolymer를 지칭한다. 2) 비결정성(amorphous) Polymer로 높은 투명성을 가진다. 제3성분(IPA, CHDM...) 도입 : 분자 구조의 규칙성 저하 결정화 억제 결정성 비결정성

  3. Chemical Structure of Copolyester TPA + EG → PET TPA + CHDM → PCT NDC + EG → PEN TPA + EG + CHDM → PETG PCTG TPA + IPA + CHDM → PCTA TPA + EG + ? → K-1

  4. CRYSTALLINE AMORPHOUS CRYSTALLINE 0 10 20 30 40 50 60 70 80 90 100 mole % of comonomer Crystalline Behaviour of Copolyester Crystalline Polyester의 단점 1) 성형시 Gate 부근에서 결정화에 의한 백화 현상 발생 (Stress Induced Crystallization) 2) 성형품의 두꺼운 부분에서 결정화에 의한 백화 현상 발생 3) 고온에서 장기간 체류시 결정화에 의한 투명도 저하

  5. Comparison of Physical Properties

  6. Chemical & Environmental Resistsnce Ammonium10% Acetic acid5% Isopropyl alcohol Olive Oil NaOH 10% Ethyl alcohol

  7. Flow Properties of Polymers

  8. Injection Molding Condition of “K-1” • Drying • - “K-1”은 성형전에 충분한 건조를 필요로 합니다. • -건조 조건 : 3 ~ 6 hr at 110 ~ 140oC • * 필히 제습형 건조시 사용을 추전합니다 • Temperature settings • - Barrel : rear 180 ~ 240oC • middle 230 ~ 250oC • front 240 ~ 260oC • - Nozzle : 250 ~ 270oC • Mold Temperature : 10 ~ 15oC • - 냉각수(Chiller)을 사용시 더욱 고투명도의 제품을 얻을 수 있습니다.

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