Highly heat-sensitive film for stencil
    21.
    发明授权
    Highly heat-sensitive film for stencil 失效
    用于模板的高热敏膜

    公开(公告)号:US4766033A

    公开(公告)日:1988-08-23

    申请号:US885210

    申请日:1986-07-14

    摘要: The present invention relates to a highly sensitive heat-sensitive film for stencil. This invention provides a highly heat-sensitive film for stencil, comprising a thermoplastic resin having a coefficient of temperature and melt viscosity (.DELTA.T/.DELTA. log VI) of not more than 100 and a thermal shrinkage (X%) at 100.degree. C. and a thermal shrinkage stress (Y g/mm.sup.2) at 100.degree. C. falling respectively in the ranges of the formulas; 15.ltoreq.X.ltoreq.80 and 75.ltoreq.Y.ltoreq.500; and both falling in the range of the formula; -8X+400.ltoreq.Y.ltoreq.-10X+1000; having a thickness in the range of 0.5 to 15 .mu.m, and excelling in low-energy perforation property.The film of this invention is superior in a low temperature perforation property, capable of being perforated with a low energy thermal head or with a low energy flash irradiation for making a plate; expansion of perforations is small when the film is perforated; and its change with time (dimensional change) is small and its sizes are stable.

    摘要翻译: 本发明涉及用于模板的高灵敏度热敏膜。 本发明提供了一种用于模版的高热敏膜,其包含热塑性树脂,其温度系数和熔体粘度(DELTA T / DELTA log VI)不大于100,热收缩率(X%)在100℃。 在100℃下的热收缩应力(Yg / mm2)分别在下式的范围内下降: 15

    Highly-oriented stretchable multilayer film and process for producing
the same
    22.
    发明授权
    Highly-oriented stretchable multilayer film and process for producing the same 失效
    高取向伸缩性多层膜及其制造方法

    公开(公告)号:US4619859A

    公开(公告)日:1986-10-28

    申请号:US654149

    申请日:1984-09-25

    摘要: The present invention provides primarily an entirely new type multilayer oriented film suited for stretch wrapping, particularly for wrapping of foods. Its features include various excellent characteristics such as mechanical strength, transparency, heat resistance, sealability, stretchability, low temperature resistance, etc. In particular, the present invention concerns a process for producing such a multilayer film by cold stretching a multilayer containing at least one layer with a specific composition capable of a high degree of cold stretching, which enables simultaneously cold stretching of other layers made of resins which can be or cannot be stretched solely, through its cold stretching force, thereby imparting high strength to all the layers, and further applying a specific heat treatment on the stretched film to modify orientation of the film so as to increase stretchability and to stabilize dimension of the film.

    摘要翻译: 本发明主要提供适用于拉伸包装的全新型多层定向膜,特别是用于食品包装。 其特征包括机械强度,透明性,耐热性,密封性,拉伸性,耐低温性等各种优异的特性。特别地,本发明涉及一种通过冷拉伸制造这种多层膜的方法,所述多层包含至少一种 具有能够进行高度冷拉伸的特定组合物的层,其能够通过其冷拉伸力同时冷却由其通过其冷拉伸力单独拉伸或不能拉伸的树脂制成的其它层,从而赋予所有层高的强度, 进一步对拉伸膜进行特定的热处理以改善膜的取向,从而增加拉伸性并使膜的尺寸稳定。

    Process for preparing cold drawn film from an ethylene-.alpha.-olefin
copolymer and at least one of low-density polyethylene or ethylene
copolymers and polypropylene, high density polyethylene or crystalline
polybutadiene
    23.
    发明授权
    Process for preparing cold drawn film from an ethylene-.alpha.-olefin copolymer and at least one of low-density polyethylene or ethylene copolymers and polypropylene, high density polyethylene or crystalline polybutadiene 失效
    由乙烯-α-烯烃共聚物和低密度聚乙烯或乙烯共聚物和聚丙烯,高密度聚乙烯或结晶聚丁二烯中的至少一种制备冷拉伸膜的方法

    公开(公告)号:US4542886A

    公开(公告)日:1985-09-24

    申请号:US213319

    申请日:1980-12-05

    摘要: A composition for shrinkable film which excels in heat-sealability, transparency, strength, and particularly low-temperature quick shrinking property and, therefore, suits production chiefly of packaging materials, a film made of the composition and a process for the manufacture of the film are disclosed. Specifically, the composition comprises one of the specific combinations of components (A), (B) and (C), i.e. the combinations of (A)+(B), (B)+(C) and (A)+(B)+(C), wherein (A) is non-rigid polyolefine resins such as ethylene vinyl acetate, (B) is an elastomer comprising a specific ethylene-.alpha.-olefine copolymer, and (C) is rigid polyolefin resins such as polypropylene. The packaging film excelling particularly in optical property, mechanical strength and low-temperature shrinking property is obtained by converting a homogeneous blend of the aforementioned composition, either in its crosslinked form or in its non-crosslinked form, into a tubular raw film, which is stretched at a temperature low enough for imparting a high orientation to the film. The process for the manufacture of this packaging film is also disclosed.

    摘要翻译: 一种热收缩性,透明性,强度,特别是低温快缩性优异的收缩性薄膜组合物,因此适用于主要由包装材料制成的薄膜,由该组合物制成的薄膜和薄膜的制造方法 被披露。 具体地,组合物包含组分(A),(B)和(C)的具体组合之一,即(A)+(B),(B)+(C)和(A)+(B )+(C),其中(A)是非刚性聚烯烃树脂如乙烯乙酸乙烯酯,(B)是包含特定乙烯-α-烯烃共聚物的弹性体,(C)是聚丙烯等刚性聚烯烃树脂。 通过将上述组合物的交联形式或非交联形式的均匀混合物转化成管状原料膜,可获得特别优异的光学性能,机械强度和低温收缩性能的包装膜, 在足够低的温度下拉伸以赋予膜高取向。 还公开了用于制造该包装膜的方法。

    Composition for drawn film
    27.
    发明授权
    Composition for drawn film 失效
    绘制成膜

    公开(公告)号:US4454303A

    公开(公告)日:1984-06-12

    申请号:US457365

    申请日:1983-01-12

    摘要: A composition for shrinkable film which excels in heat-sealability, transparency, strength, and particularly low-temperature quick shrinking property and, therefore, suits production chiefly of packaging materials, a film made of the composition and a process for the manufacture of the film are disclosed. Specifically, the composition comprises one of the specific combinations of components (A), (B), and (C), i.e. the combinations of (A)+(B), (B)+(C) and (A)+(B)+(C), wherein (A) is non-rigid polyolefine resins such as ethylene vinyl acetate, (B) is an elastomer comprising a specific ethylene-.alpha.-olefin copolymer, and (C) is rigid polyolefin resins such as polypropylene. The packaging film excelling particularly in optical property, mechanical strength and low-temperature shrinking property is obtained by converting a homogenenous blend of the aforementioned composition, either in its crosslinked form or in its non-crosslinked form, into a tubular raw film, which is stretched at a temperature low enough for imparting a high orientation to the film. The process for the manufacture of this packaging film is also disclosed.

    摘要翻译: 一种热收缩性,透明性,强度,特别是低温快缩性优异的收缩性薄膜组合物,因此适用于主要由包装材料制成的薄膜,由该组合物制成的薄膜和薄膜的制造方法 被披露。 具体地,组合物包含组分(A),(B)和(C)的具体组合之一,即(A)+(B),(B)+(C)和(A)+( B)+(C),其中(A)是非刚性聚烯烃树脂如乙烯乙酸乙烯酯,(B)是包含特定乙烯-α-烯烃共聚物的弹性体,(C)是刚性聚烯烃树脂如聚丙烯 。 通过将上述组合物的均匀混合物以其交联形式或其非交联形式转化成管状原料膜,得到特别优异的光学性能,机械强度和低温收缩性能的包装膜,其为 在足够低的温度下拉伸以赋予膜高取向。 还公开了用于制造该包装膜的方法。

    Composition for drawn film, cold drawn film made of said composition and
process for manufacture of said film
    29.
    发明授权
    Composition for drawn film, cold drawn film made of said composition and process for manufacture of said film 失效
    用于拉伸膜的组合物,由所述组合物制成的冷拉伸膜和用于制造所述膜的方法

    公开(公告)号:US4277578A

    公开(公告)日:1981-07-07

    申请号:US949253

    申请日:1978-10-06

    摘要: A composition for shrinkable film which excels in heat-sealability, transparency, strength, and particularly low-temperature quick shrinking property and, therefore, suits production chiefly of packaging materials, a film made of the composition and a process for the manufacture of the film are disclosed. Specifically, the composition comprises one of the specific combinations of components (A), (B) and (C), i.e. the combinations of (A)+(B), (B)+(C) and (A)+(B)+(C), wherein (A) is non-rigid polyolefine resins such as ethylene vinyl acetate, (B) is an elastomer comprising a specific ethylene-.alpha.-olefin copolymer, and (C) is rigid polyolefin resins such as polypropylene. The packaging film excelling particularly in optical property, mechanical strength and low-temperature shrinking property is obtained by converting a homogeneous blend of the aforementioned composition, either in its crosslinked form or in its non-crosslinked form, into a tubular raw film, which is stretched at a temperature low enough for imparting a high orientation to the film. The process for the manufacture of this packaging film is also disclosed.

    摘要翻译: 一种热收缩性,透明性,强度,特别是低温快缩性优异的收缩性薄膜组合物,因此适用于主要由包装材料制成的薄膜,由该组合物制成的薄膜和薄膜的制造方法 被披露。 具体地,组合物包含组分(A),(B)和(C)的具体组合之一,即(A)+(B),(B)+(C)和(A)+(B )+(C),其中(A)是非刚性聚烯烃树脂如乙烯乙酸乙烯酯,(B)是包含特定乙烯-α-烯烃共聚物的弹性体,(C)是聚丙烯等刚性聚烯烃树脂。 通过将上述组合物的交联形式或非交联形式的均匀混合物转化成管状原料膜,可获得特别优异的光学性能,机械强度和低温收缩性能的包装膜, 在足够低的温度下拉伸以赋予膜高取向。 还公开了用于制造该包装膜的方法。