Heat shrinkable polypropylene laminate film
    1.
    发明授权
    Heat shrinkable polypropylene laminate film 失效
    热收缩聚丙烯层压膜

    公开(公告)号:US5620803A

    公开(公告)日:1997-04-15

    申请号:US648011

    申请日:1996-05-29

    IPC分类号: B29C55/28 B32B27/32 B32B27/08

    摘要: The heat shrinkable polypropylene film having an isotactic polypropylene layer as surface layers and a layer mainly composed of a syndiotactic polypropylene as an intermediate layer, having a shrinkage of not less than 25% at 100.degree. C. in the machine and transverse directions and being stretched at least two times in the machine and transverse directions, respectively. The film has a good packaging machine applicability and excellent propagation tear resistance, low temperature shrinkability and heat resistance, and is suitably used as a shrink packaging material.

    摘要翻译: PCT No.PCT / JP95 / 01915 Sec。 371日期:1996年5月29日 102(e)日期1996年5月29日PCT提交1995年9月22日PCT公布。 公开号WO96 / 09931 日期1996年4月4日具有全同立构聚丙烯层作为表层的热收缩聚丙烯膜和主要由间同立构聚丙烯作为中间层的层,在机器中在100℃下收缩率不低于25% 横向,并分别在机器和横向上被拉伸至少两次。 该膜具有良好的包装机适用性和优异的抗拉伸性,耐低温收缩性和耐热性,适用于收缩包装材料。

    Heat shrinkable polyolefin laminate film
    2.
    发明授权
    Heat shrinkable polyolefin laminate film 失效
    热收缩聚烯烃层压膜

    公开(公告)号:US5691049A

    公开(公告)日:1997-11-25

    申请号:US648006

    申请日:1996-05-24

    摘要: A heat shrinkable polyolefin laminate film having surface layers made of a crystalline polypropylene resin, and an intermediate layer made of an ethylene resin composition consisting essentially of a linear low density polyethylene and a syndiotactic polypropylene, which is stretched at least two times in the machine and transverse directions, respectively, and which does not cause lowering of the transparency even if recovered films are incorporated into the intermediate layer, is excellent in low temperature shrinkability and packaging machine applicability, and is suitably used as a heat shrinkable packaging material.

    摘要翻译: PCT No.PCT / JP95 / 01914 Sec。 371日期:1996年5月24日 102(e)日期1996年5月24日PCT提交1995年9月22日PCT公布。 出版物WO96 / 09930 日期1996年4月4日一种具有由结晶聚丙烯树脂制成的表面层的热收缩聚烯烃层压膜和由基本上由线性低密度聚乙烯和间同立构聚丙烯组成的乙烯树脂组合物制成的中间层,其被拉伸至少两个 即使在中间层中加入回收膜也不会降低透明性,低温收缩性和包装机适用性优异,适合用作热收缩性包装 材料。

    Process for preparing N6,9-disubstituted adenine
    3.
    发明授权
    Process for preparing N6,9-disubstituted adenine 失效
    制备N6,9-二取代腺嘌呤的方法

    公开(公告)号:US4900826A

    公开(公告)日:1990-02-13

    申请号:US419317

    申请日:1982-09-17

    IPC分类号: C07D473/00

    CPC分类号: C07D473/00

    摘要: A process for preparing N.sup.6, 9-disubstituted adenines which comprises reacting a metal salt of N.sup.6 -substituted adenine with a benzyl halide compound, preferably in the presence of a phase transfer catalyst. According to the process, the N.sup.6,9-disubstuted adenines can be obtained in high yields and good selectivity.

    摘要翻译: 制备N6,9-二取代腺嘌呤的方法,其包括使N6取代的腺嘌呤的金属盐与苄基卤化合物反应,优选在相转移催化剂存在下进行。 根据该方法,可以高产率和良好的选择性获得N6,9-二次分解的腺嘌呤。

    Multi-layer stretchable, shrinkable polyethylene film and process for
the preparation thereof
    4.
    发明授权
    Multi-layer stretchable, shrinkable polyethylene film and process for the preparation thereof 失效
    多层可拉伸,收缩聚乙烯薄膜及其制备方法

    公开(公告)号:US5759675A

    公开(公告)日:1998-06-02

    申请号:US646260

    申请日:1996-05-17

    摘要: A multi-layer film having an intermediate layer containing, as a main component, a mixture of two kinds of specific linear low density polyethylenes, and innermost and outermost layers containing, as a main component, a mixture of a specific high pressure process polyethylene, a specific ethylene-.alpha.-olefin copolymer and a specific linear low density polyethylene. The film has an automatic packaging machine applicability and an excellent heat sealability at low temperatures without defects such as lowering of tuck in property, stretchability in the transverse direction and film slipping property and blocking, and is suitably employed as films for stretch packaging and shrink packaging which are used for prepackaging of retailed goods, mainly foods. Further, a multi-layer film prepared by incorporating a specific surfactant composition into at least two layers of the above multi-layer film has, in addition to these properties, an excellent antifogging effect (initial antifogging property and retainability of antifogging property) on various objects to be packaged.

    摘要翻译: PCT No.PCT / JP95 / 01841 Sec。 371日期1996年5月17日 102(e)日期1996年5月17日PCT提交1995年9月18日PCT公布。 公开号WO96 / 09166 日期:1996年3月28日一种具有中间层的多层膜,该中间层以两种特定线性低密度聚乙烯的混合物为主要成分,最外层和最外层含有特定的 高压法聚乙烯,特定的乙烯-α-烯烃共聚物和特定的线性低密度聚乙烯。 该薄膜具有自动包装机的适用性和低温下的良好的热封性,没有诸如性能下降,横向拉伸性和薄膜滑动性和阻塞等缺陷,并且适合用作拉伸包装和收缩包装用薄膜 用于预先包装零售商品,主要是食品。 此外,通过将特定的表面活性剂组合物加入到上述多层膜的至少两层中制备的多层膜除了具有这些性质之外,还具有优异的防雾效果(防雾性能的初始防雾性和防雾性的保留性) 要包装的物品

    Heat shrinkable film
    5.
    发明授权
    Heat shrinkable film 失效
    热收缩薄膜

    公开(公告)号:US4801652A

    公开(公告)日:1989-01-31

    申请号:US20980

    申请日:1987-03-02

    摘要: A biaxially stretched film of an ethylene copolymer, preferably a mixture of (A) 90 to 50% by weight of a linear ethylene-.alpha.-olefin copolymer having a density of 0.90 to 0.93 g/cm.sup.3 at 25.degree. C. and a melt index of 0.2 to 3.0 g/10 min. and (B) 10 to 50% by weight of an ethylene polymer having a density of 0.87 to 0.91 g/cm.sup.3 at 25.degree. C. and less than the density of the copolymer (A) by at least 0.014 g/cm.sup.3 and a melt index of 0.2 to 5.0 g/10 min., said copolymer or copolymer mixture giving a DSC curve with an endothermic area under the temperature lower than its melting temperature (main endothermic peak temperature) by 10.degree. C. accounting for at leat 55% of the total endothermic area. The stretched film is little varying in thickness and is excellent in heat shrinkability at low temperature.

    摘要翻译: 乙烯共聚物的双轴拉伸膜,优选(A)在25℃密度为0.90〜0.93g / cm 3的线性乙烯-α-烯烃共聚物的90〜50重量%的混合物,熔体指数 为0.2〜3.0g / 10min。 和(B)10至50重量%的在25℃密度为0.87至0.91g / cm 3的乙烯聚合物,并且小于共聚物(A)的密度至少为0.014g / cm 3,熔体 指数为0.2〜5.0g / 10min,所述共聚物或共聚物混合物在低于其熔融温度(主吸热峰温度)的温度下提供具有吸热面积的DSC曲线10℃,占55% 总吸热面积。 拉伸膜的厚度变化不大,在低温下的热收缩性优异。

    Process of making stretchable, heat shrinkable polyethylene film
    6.
    发明授权
    Process of making stretchable, heat shrinkable polyethylene film 失效
    制造可拉伸,热收缩聚乙烯薄膜的工艺

    公开(公告)号:US5132074A

    公开(公告)日:1992-07-21

    申请号:US393943

    申请日:1989-08-15

    IPC分类号: B29C55/28 B29C61/02 C08J5/18

    摘要: A stretchable, heat shrinkable ethylene-.alpha.-olefin copolymer film which has excellent stretchability as well as shrinkability at a low temperature and is useful as a good packaging material is prepared by melt extruding a composition including at least one ethylene-.alpha.-olefin copolymer as a main component to give a non-stretched film and biaxially stretching the film in a temperature region where an orientation can be induced and at an area stretching ratio of not less than 8 under conditions such that a tensile strength is from 30 to 170 kg/cm.sup.2. The film has an index of refraction N of 1.500 to 1.522, a degree of orientation Wk according to X-ray diffraction method of 0.78 to 0.93 and an area shrinkage of not less than 15% at 90.degree. C.

    摘要翻译: 通过将包含至少一种乙烯-α-烯烃共聚物的组合物熔融挤出成为包含至少一种乙烯-α-烯烃共聚物的组合物来制备在低温下具有优异的拉伸性和可收缩性的可伸缩的热收缩乙烯-α-烯烃共聚物膜, 在拉伸强度为30〜170kg / m 2的条件下,在可以诱导取向的温度区域中以不小于8的面积拉伸比得到非拉伸膜并双轴拉伸膜的主要成分, cm2。 该膜的折射率N为1.500〜1.522,根据X射线衍射法的取向度Wk为0.78〜0.93,90℃下的面积收缩率为15%以上。

    Process for preparing heat shrinkable polyethylene film
    7.
    发明授权
    Process for preparing heat shrinkable polyethylene film 失效
    制备热收缩聚乙烯薄膜的方法

    公开(公告)号:US4985197A

    公开(公告)日:1991-01-15

    申请号:US360574

    申请日:1989-06-02

    摘要: A process for preparing a heat shrinkable film which is made from a copolymer of ethylene and 0.5 to 10% by mole of an .alpha.-olefin having 4 to 12 carbon atoms, the copolymer having a g* value (i.e., intrinsic viscosity of the copolymer/intrinsic viscosity of a linear polyethylene having the same molecular weight) of 0.3 to 0.7, a melt index of 0.3 to 2.0 g/10 min., and a density at 25.degree. C. of 0.86 to 0.92 g/cm.sup.3, wherein a tubular film of the copolymer is stretched under the following conditions:(A) the film surface temperature at the starting point of expansion being within the range of 20.degree. to 30.degree. C. below the melting temperature;(B) the film in a stretching zone extending from the starting point to the finishing point of expansion having a temperature gradient such that the film surface temperature at a position of 1/4 to 1/3 the vertical length (L) of the stretching zone from the starting point is maximum, and the difference between the maximum film temperature and the film temperature at the starting point of expansion being not more than 5.degree. C.;(C) the temperature drop of the film from the maximum temperature position to the finishing point of expansion being within the range of 15.degree. to 20.degree. C.; and(D) the film being cooled rapidly so that its temperature drops to a value of not more than 60.degree. C. while traveling from the finishing point to a distnace of 0.8 time the vertical distance of the stretching zone.

    Method and device for removing dust from surface of support
    8.
    发明申请
    Method and device for removing dust from surface of support 审中-公开
    用于从支撑体表面除去灰尘的方法和装置

    公开(公告)号:US20050205117A1

    公开(公告)日:2005-09-22

    申请号:US11081660

    申请日:2005-03-17

    摘要: According to the method of the present invention, the clean gas is supplied between the support and the plate-like body to form the pressurized space, thereby preventing the surface of the support from being exposed to dust and allowing a conveyance path to be maintained at desired cleanliness. Specifically, the pressurized space between the support and the plate-like body is at the atmospheric pressure or higher, thereby preventing dust from being introduced.

    摘要翻译: 根据本发明的方法,将清洁气体供应到支撑件和板状体之间以形成加压空间,从而防止支撑体的表面暴露于灰尘并允许输送路径保持在 所需的清洁度。 具体地说,支撑体和板状体之间的加压空间为大气压以上,从而防止灰尘的导入。

    Biaxially stretched polyethylene film
    9.
    发明授权
    Biaxially stretched polyethylene film 失效
    双轴拉伸聚乙烯薄膜

    公开(公告)号:US5306549A

    公开(公告)日:1994-04-26

    申请号:US667392

    申请日:1991-03-27

    摘要: The present invention relates to a biaxially stretched film whose main component is a linear low density polyethylene showing, in measurement of a melting point by a differential scanning calorimeter, a main peak temperature (Tma) within the range of 118.degree..+-.5.degree. C. in a melting curve obtained when after a temperature of the polyethylene is kept at 190.degree. C. for 30 minutes, the temperature is dropped down to 20.degree. C. at a cooling rate of 100.degree. C./minute and subsequently raised at a heating rate of 10.degree. C./minute (hereinafter referred to as "melting curve after rapidly cooling") and showing a temperature difference between Tma and Tmb of at least 3.degree. C. wherein Tmb is a main peak temperature in a melting curve obtained when after the temperature of the polyethylene is kept at 190.degree. C. for 30 minutes, the temperature is dropped down to 20.degree. C. at a cooling rate of 10.degree. C./minute and subsequently raised at a heating rate of 10.degree. C./minute (hereinafter referred to as "melting curve after gradually cooling") (hereinafter referred to as "lowered melting point polyethylene in rapidly cooling"). Since this film is excellent in stability on stretching, the stretching can be stably conducted by a low tensile strength upon stretching, as a result a stretched film having excellent stretchability and shrinkability, and having excellent elastic restoration can be obtained.

    摘要翻译: PCT No.PCT / JP90 / 01307 Sec。 371日期1991年3月27日 102(e)1991年3月27日PCT PCT 1990年10月9日PCT公布。 出版物WO91 / 05004 日本1991年04月18日。本发明涉及一种双轴拉伸膜,其主要成分是线性低密度聚乙烯,其显示在通过差示扫描量热计测量熔点的主峰温度(Tma)在 在将聚乙烯的温度保持在190℃30分钟后获得的熔融曲线中,以100℃的冷却速度将温度降至20℃/ 然后以10℃/分钟的加热速率升温(以下称为“快速冷却后的熔解曲线”),并显示Tma和Tmb之间的温度差为至少3摄氏度。其中Tmb为主峰 在将聚乙烯的温度保持在190℃30分钟后获得的熔融曲线温度,以10℃/分钟的冷却速度将温度降至20℃,随后在 加热 g以下(以下称为“逐渐冷却后的熔融曲线”)(以下称为“快速冷却中的降低熔点聚乙烯”)。 由于该膜在拉伸时的稳定性优异,因此拉伸时的拉伸强度可以稳定地进行拉伸,因此可以获得拉伸性和收缩性优异的拉伸膜,并且可以得到优异的弹性恢复性。