KR920701339A - 폴리에틸렌계 이축연신 필름 - Google Patents

폴리에틸렌계 이축연신 필름

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KR920701339A
KR920701339A KR1019910700361A KR910700361A KR920701339A KR 920701339 A KR920701339 A KR 920701339A KR 1019910700361 A KR1019910700361 A KR 1019910700361A KR 910700361 A KR910700361 A KR 910700361A KR 920701339 A KR920701339 A KR 920701339A
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polyethylene
weight
linear low
low density
composition
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KR100186871B1 (ko
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히데오 이소자끼
마고또 히라따
미스미 다까하시
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오오쓰까 미찌도
가부시기가이샤 고오진
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    • 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
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract

내용 없음

Description

폴리에틸렌계 이축연신 필름
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 실시예에 사용된 이축 연신장치를 나타내는 개략도이다.

Claims (11)

  1. 하기에 언급된 선형 저밀도 폴리에틸렌(A)을 주성분으로 하는 폴리에틸렌계 이축연산 필름.
  2. 하기에 언급된 선형 저밀도 폴리에틸렌(A) 90내지 60중량%및 하기에 언급된 에틸렌-α-올레핀 공중합체 (B) 10 내지 40중량%의 합계 100중량부, 및 하기에 언급된 계면활성제 조성물(D) 0.5 내지 3.0 중량부를 주성분으로서 포함하는 폴리에틸렌계 이축연신 필름.
  3. 선형 저밀도 폴리에틸렌(A)〔여기서, 성분(A)는 0.870 내지 0.930g/㎥의 밀도 및 0.1 내지 10g/10분의 용융지스(melt flow index)를 가지며; 시차주사 열량계로 융점을 측정하는 경우, 폴리에틸렌의 온도를 190℃에서 30분동안 유지시킨후, 온도를 100℃/min의 냉각속도로 20℃로 강하시키고 이어서 10℃/min의 가열속도로 상승시킬 때 수득되는 용융곡선{이하, "급냉후의 용융곡선(melting curve)"이하 칭함}에서 118±5℃ 범위내의 주요 파이크 온도(main peak temp.)(Tma)를 나타내며, 적어도 3℃의 Tma와 Tmb 사이의 온도차{여기서, Tmb는 폴리에틸렌의 온도를 190℃에서 30분동안 유지시킨후에 온도를 10℃/min의 냉각속도로 20℃로 강하시키고 이어서 10℃/min의 가열속도로 상승시킬때 수득되는 용융곡선(이하, "점진적인 냉각후의 용융곡선"이라 칭함)에서의 주요 피이크 온도이다}를 나타내는 선형 저밀도 폴리에틸렌(이하, "급냉 융점저하 폴리에틸렌(lowered melting point polyethylene in rapidly cooling)"이라 칭함)이다}를 주성분으로서 포함하는 조성물로부터 제조된 중간층; 및 0.870 내지 0.900g/㎤의 밀도, 0.1 내지 20g/10분의 용융 지수 및 50 내지 100℃의 DSC에 따른 융점을 갖는 에틸렌-α-올레핀 공중합(B)〔이하, "저융점 폴리에틸렌 공중합체"라 칭함〕20내지 60중량%, 및 0.890 내지 0.930g/㎤의 밀도 및 0.1 내지 10g/10분의 용융 지수를 갖는 선형 저밀도 폴리에틸렌(C)〔이하, "범용 선형 저밀도 폴리에틸렌"이라 칭함〕80내지 40중량%의 합계 100중량부; 및 글리세롤 지방산 에스테르, 폴리글리세롤 지방산 에스테르, 소르비탄 지방산 에스테르, 폴리에틸렌 글리콜 지방산 에스테르, 알킬 디에탄올 아미드, 폴리옥시에틸렌 알킬 아민 및 폴리옥시에틸렌 알킬 에테르로 이루어진 그룹으로부터 선택된 적어도 하나의 계면 활성제를 포함하는 계면활성제 조성물(D)〔이하, "계면활성제 조성물"이라 칭함〕0.5 내지 3.0중량부를 주성분으로서 포함하는 조성물로부터 제조된 최내각층 및 최외각층을 포함하는, 중간층의 두께가 모든 충돌의 60%를 차지하며 최내각층 및 최외각층의 두께가 각각 적어도 1㎛인 폴리에틸렌계 이축연신 필름.
  4. 제2항 또는 제3항에 있어서, 상기 계면활성제 조성물이 폴리글리세롤 지방산 에스테르, 소르비탄 지방산 에스테르, 폴리에틸렌 글리콜 지방산 에스테르 및 알킬 에탄올 아민으로 이루어진 그룹중에서 선택된 적어도 하나의 계면 활성제임을 특징으로 하는 폴리에틸렌계 이축연신 필름.
  5. 제1항 내지 제3항중 어느 한 항에 있어서, Tma±5℃범위내의 흡열면적이 총 흡열면적의 적어도 15%를 차지함을 특징으로 하는 폴리에틸린계 이축연신 필름.
  6. 제1항 내지 제3항중 어느 한 항에 있어서, 두께변화 (thick variation)가 8%미만임을 특징으로 하는 폴리에틸렌계 이축연신 필름.
  7. 제1항 내지 제3항중 어느 한 항에 있어서, 면적 수축률이 90℃에서 적어도 20%임을 특징으로 하는 폴리에틸렌계 이축연신 필름.
  8. 제2항 또는 제3항에 있어서 50%-신장시의 인장응력이 500㎏/㎤ 이하임을 특징으로 하는 폴리에틸렌계 이축연신 필름.
  9. 제2 또는 제3항에 있엇, 90℃에서 15%의 면적 수축률로 열수축된 필름을 종방향 및 횡방향으로 30%신장시킨 1분후의 탄성회복률이 각각 적어도 90%임을 특징으로 하는 폴리에틸렌계 이축연신 필름.
  10. 상기 언급된 선형 저밀도 폴리에틸렌(A)90 내지 60중량%및 상기 언급된 에틸렌-α-올레핀 공중합체(B) 10 내지 40중량%의 합계 100중량부, 및 상기 언급된 계면 활성제 조성물(D) 0.5 내지 3.0 중량부를 주성분으로서 포함하는 조성물을 용융-압축시킨 다음 급냉 고화시키고 수득된 비연신 필름을 하기 방정식(Ⅰ)으로 표시되는 연장강도가 30≤S≤170㎏/㎤가 되도록 하는 조건하에 연신시켜 배향을 유도할 수 있는 온도 영역내에서 연신시킴을 특징으로 하는, 폴리에틸렌계 이축연신 필름의 제조방법.
    방정식(Ⅰ) :
    상기 방정식에서, p는 버블(bubble)의 내압(㎏/㎤)이고, d는 버블의 내경(㎝)이며, t는 필름 두께(㎝)이다.
  11. 중간층을 형성하는 상기 언급된 선형 저밀도 폴리에틸렌(A)을 주성분으로서 포함하는 조성물; 및 상기 언급된 에틸렌-α-올레핀 공중합체(B)20 내지 60중량%및 상기 언급된 선형 저밀도 폴리에틸렌(C)80내지 40중량%의 합계 100중량부, 및 상기 언급된 계면활성제 조성물(D) 0.5 내지 3.0중량부를 주성분으로서 포함하는 조성물을, 중간층의 두께가 모든 층들의 적어도 60%를 차지하고 최내각층 및 최외각층의 후가공 공정에서 연신처리 단계후의 두께가 각각 적어도 1㎛이 되도록 용융-공압출시킨 다음 급냉 고화시키고; 수득된 비연신필름을 상기 언급된 방정식(Ⅰ)로 표시되는 인장 강도가 30≤S≤170㎏/㎤이 되도록 하는 조건하에 연신시켜 배향을 유도할 수 있는 온도 영역내에서 연신시킴을 특징으로 하는, 폴리에틸렌계 이축연신 필름의 제조방법.
    ※참고사항 : 최초출원 내용에 의하여 공개되는 것임.
KR1019910700361A 1989-10-09 1990-10-09 폴리에틸렌계 이축연신 필름 KR100186871B1 (ko)

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PCT/JP1990/001307 WO1991005004A1 (fr) 1989-10-09 1990-10-09 Film de polyethylene a orientation biaxiale

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CA2039158A1 (en) 1991-04-10
JPH03205430A (ja) 1991-09-06
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CA2039158C (en) 2000-02-22
DK0450088T3 (da) 1996-05-28
JP2904903B2 (ja) 1999-06-14
WO1991005004A1 (fr) 1991-04-18
AU640419B2 (en) 1993-08-26
AU6514390A (en) 1991-04-28
EP0450088A1 (en) 1991-10-09
JPH03220250A (ja) 1991-09-27
JPH03215034A (ja) 1991-09-20
JP2927928B2 (ja) 1999-07-28
DE69026929D1 (de) 1996-06-13

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