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    • 1. 发明专利
    • Gas permeable film having uneven form
    • 具有未来形式的气体渗透膜
    • JP2003012825A
    • 2003-01-15
    • JP2001193509
    • 2001-06-26
    • Chisso CorpChisso Sekiyu Kagaku Kkチッソ株式会社チッソ石油化学株式会社
    • ANDO YUJINISHITANI TAKAYUKI
    • C08J5/18B29C55/02B29K23/00B29L7/00C08F297/08
    • PROBLEM TO BE SOLVED: To provide a packaging film excellent in packaging aptitude which has high gas permeability and moisture permeability without pore and cutout section.
      SOLUTION: A gas permeable film has an uneven form comprising substantially continuous protrusion parts and discrete recess parts divided with the protrusion parts which is formed on at least one side of a film comprising a propylene- based block copolymer having a specific composition. The uneven form satisfies the following requirements: (1) the thickness d
      a of the recess part is 0.003-0.05 nm, and the d
      a /d
      b , a rate of the recess thickness d
      a based on protrusion thickness d
      b , is 0.05≤d
      a /d
      b ≤0.8; and (2) the S
      a /S
      b , a rate of the recess area S
      a based on protrusion area S
      b on a film surface having the uneven form, is 0.1≤S
      a /S
      b ≤5.
      COPYRIGHT: (C)2003,JPO
    • 要解决的问题:提供一种在没有孔和切口部分的情况下具有优异的气体渗透性和透湿性的包装性能优异的包装膜。 解决方案:透气膜具有不均匀形状,其包括基本上连续的突出部分和分开的凹部,该突起部分和突出部分分开形成在包含具有特定组成的基于丙烯的嵌段共聚物的膜的至少一侧上。 凹凸形状满足以下要求:(1)凹部的厚度da为0.003〜0.05nm,基于突出厚度db的凹部厚度da的da / db为0.05 <= da / db <= 0.8; 和(2)Sa / Sb,基于凹凸区域Sa的凹凸面积Sa的比例为0.1≤Sa/Sb≤5。
    • 8. 发明专利
    • ID22913A
    • 1999-12-16
    • ID991483
    • 1999-04-02
    • CHISSO CORP
    • NAKATA SHINJIKUGIMIYA YOUICHIOKAYAMA CHIKASHINAKASHIMA TAKANORIANDO YUJI
    • B29C55/04C08J5/18C08L23/10C08L23/12C08L23/14C08L23/16C08L23/08B32B27/32B29C55/02
    • An object of the present invention is to provide a drawn polypropylene film as a wrapping material that has transparency and mechanical properties sufficient as a wrapping material yet having permeability of gases need for maintaining the freshness of the enclosed goods and in addition that enables control of permeability of gases to a certain proportion if needed even if secondary steps such as perforation processing, etc. is eliminated. The present invention provides a drawn polypropylene film drawn at least in a monoaxial direction, which comprises a propylene resin composition comprising a propylene polymer component and a copolymer component containing ethylene and propylene, wherein a content of the copolymer component is 7 to 70% by weight based on the weight of the composition, and the film has a thickness ÄD1Ü of 1.0 to 100 mu m and has the following characteristics (1) to (3): (1) ÄTH2OÜ(a permeability of water vapor) = 9 - 50 (unit: g/m . 24 Hr, in accordance with JIS Z-0208), (2) ÄTO2Ü(a permeability of oxygen gas) = 600 - 12,500 (unit: nmol (STP)/m . s . 100 kPa, in accordance with JIS K-7126A) (3) ÄTethyleneÜ(a permeability of ethylene gas) = 600 - 22,500 (unit: nmol (STP)/m . s . 100 kPa, in accordance with JIS K-7126A)
    • 9. 发明专利
    • DE69902081D1
    • 2002-08-14
    • DE69902081
    • 1999-04-02
    • CHISSO CORP
    • NAKATA SHINJIKUGIMIYA YOUICHIOKAYAMA CHIKASHINAKASHIMA TAKANORIANDO YUJI
    • B29C55/04C08J5/18C08L23/10C08L23/12C08L23/14C08L23/16C08L23/08B32B27/32B29C55/02
    • An object of the present invention is to provide a drawn polypropylene film as a wrapping material that has transparency and mechanical properties sufficient as a wrapping material yet having permeability of gases need for maintaining the freshness of the enclosed goods and in addition that enables control of permeability of gases to a certain proportion if needed even if secondary steps such as perforation processing, etc. is eliminated. The present invention provides a drawn polypropylene film drawn at least in a monoaxial direction, which comprises a propylene resin composition comprising a propylene polymer component and a copolymer component containing ethylene and propylene, wherein a content of the copolymer component is 7 to 70% by weight based on the weight of the composition, and the film has a thickness ÄD1Ü of 1.0 to 100 mu m and has the following characteristics (1) to (3): (1) ÄTH2OÜ(a permeability of water vapor) = 9 - 50 (unit: g/m . 24 Hr, in accordance with JIS Z-0208), (2) ÄTO2Ü(a permeability of oxygen gas) = 600 - 12,500 (unit: nmol (STP)/m . s . 100 kPa, in accordance with JIS K-7126A) (3) ÄTethyleneÜ(a permeability of ethylene gas) = 600 - 22,500 (unit: nmol (STP)/m . s . 100 kPa, in accordance with JIS K-7126A)
    • 10. 发明专利
    • DE69902081T2
    • 2003-01-30
    • DE69902081
    • 1999-04-02
    • CHISSO CORP
    • NAKATA SHINJIKUGIMIYA YOUICHIOKAYAMA CHIKASHINAKASHIMA TAKANORIANDO YUJI
    • B29C55/04C08J5/18C08L23/10C08L23/12C08L23/14C08L23/16C08L23/08B32B27/32B29C55/02
    • An object of the present invention is to provide a drawn polypropylene film as a wrapping material that has transparency and mechanical properties sufficient as a wrapping material yet having permeability of gases need for maintaining the freshness of the enclosed goods and in addition that enables control of permeability of gases to a certain proportion if needed even if secondary steps such as perforation processing, etc. is eliminated. The present invention provides a drawn polypropylene film drawn at least in a monoaxial direction, which comprises a propylene resin composition comprising a propylene polymer component and a copolymer component containing ethylene and propylene, wherein a content of the copolymer component is 7 to 70% by weight based on the weight of the composition, and the film has a thickness ÄD1Ü of 1.0 to 100 mu m and has the following characteristics (1) to (3): (1) ÄTH2OÜ(a permeability of water vapor) = 9 - 50 (unit: g/m . 24 Hr, in accordance with JIS Z-0208), (2) ÄTO2Ü(a permeability of oxygen gas) = 600 - 12,500 (unit: nmol (STP)/m . s . 100 kPa, in accordance with JIS K-7126A) (3) ÄTethyleneÜ(a permeability of ethylene gas) = 600 - 22,500 (unit: nmol (STP)/m . s . 100 kPa, in accordance with JIS K-7126A)