公开(公告)号：US20070093573A1

公开(公告)日：2007-04-26

申请号：US11567050

申请日：2006-12-05

申请人： Paul Taylor ,  Kevin Goninan ,  Thomas Simpkins ,  Michael Williams ,  Anthony Soden

发明人： Paul Taylor ,  Kevin Goninan ,  Thomas Simpkins ,  Michael Williams ,  Anthony Soden

IPC分类号： C08J3/00

CPC分类号： C08J3/18 ,  C08J2329/04 ,  C08K3/36 ,  C08K5/0016 ,  C08K5/053 ,  C08L29/04

摘要： A method of preparing a plasticised particulate polyvinyl alcohol (PVA) composition is provided, comprising: mixing, in a mixer, at a mixer speed and for a time sufficient that the mixture attains a temperature of at least 50° C.: particulate PVA resin in an amount from 80% to 90% by weight of the mixture; and plasticiser in an amount from 10% to 20% by weight of the mixture, wherein at least a portion of the plasticiser is water; monitoring the apparent viscosity of the mixture during mixing and continuing mixing until the apparent viscosity of the mixture has peaked to a maximum and dropped off to a substantially constant level, thereby to obtain a plasticised particulate mixture having a moisture content in the range from 7% to 14%; preferably adding an anti-caking agent in an amount from 0.05% to 0.5% by weight of the plasticised particulate mixture, and continuing mixing until the anti-caking agent is blended to the plasticised particulate mixture; and stopping mixing, and removing the mixture from the mixer, wherein the mixture temperature is kept below 100° C. at all times during mixing. The properties of the plasticised particulate composition are such that it can be processed, by extrusion and blowing, to a film having advantageous characteristics in terms of structure and properties. Accordingly, also provided is a PVA film characterised in that, when viewed using polarising light microscopy, it has a nonuniform texture consisting of distinct short range areas, e.g. 10 to 500 micrometers, each short range area showing anisotropic orientation within its area, each short range area being oriented isotropically.

摘要翻译： 提供了一种制备增塑的颗粒状聚乙烯醇（PVA）组合物的方法，其包括：在混合器中以混合速度混合足够的时间，使混合物达到至少50℃的温度：颗粒状PVA树脂 其量为混合物重量的80％至90％; 和增塑剂，其量为混合物重量的10％至20％，其中至少一部分增塑剂为水; 在混合和连续混合期间监测混合物的表观粘度，直到混合物的表观粘度达到最大值并降至基本恒定的水平，从而获得水分含量为7％ 至14％; 优选以增塑的颗粒混合物的0.05重量％至0.5重量％的量加入抗结块剂，并持续混合，直到抗结块剂与增塑的颗粒混合物混合; 并停止混合，并从混合器中除去混合物，其中混合物中的混合物在混合期间始终保持低于100℃。 增塑的颗粒组合物的性质使得其可以通过挤出和吹塑加工成具有结构和性质方面有利特征的膜。 因此，还提供了一种PVA膜，其特征在于，当使用偏振光显微镜观察时，其具有由不同的短距离区域组成的不均匀质地，例如， 10至500微米，每个短范围区域在其区域内显示各向异性取向，每个短范围区域各向同性地取向。

公开(公告)号：US20050209362A1

公开(公告)日：2005-09-22

申请号：US11128683

申请日：2005-05-13

申请人： Paul Taylor ,  Kevin Goninan ,  Thomas Simpkins ,  Michael Williams ,  Anthony Soden

发明人： Paul Taylor ,  Kevin Goninan ,  Thomas Simpkins ,  Michael Williams ,  Anthony Soden

IPC分类号： C08L1/00

CPC分类号： C08J3/18 ,  C08J2329/04 ,  C08K3/36 ,  C08K5/0016 ,  C08K5/053 ,  C08L29/04

摘要： A method of preparing a plasticised particulate polyvinyl alcohol (PVA) composition is provided, comprising: mixing, in a mixer, at a mixer speed and for a time sufficient that the mixture attains a temperature of at least 50° C.: particulate PVA resin in an amount from 80% to 90% by weight of the mixture; and plasticiser in an amount from 10% to 20% by weight of the mixture, wherein at least a portion of the plasticiser is water; monitoring the apparent viscosity of the mixture during mixing and continuing mixing until the apparent viscosity of the mixture has peaked to a maximum and dropped off to a substantially constant level, thereby to obtain a plasticised particulate mixture having a moisture content in the range from 7% to 14%; preferably adding an anti-caking agent in an amount from 0.05% to 0.5% by weight of the plasticised particulate mixture, and continuing mixing until the anti-caking agent is blended to the plasticised particulate mixture; and stopping mixing, and removing the mixture from the mixer, wherein the mixture temperature is kept below 100° C. at all times during mixing. The properties of the plasticised particulate composition are such that it can be processed, by extrusion and blowing, to a film having advantageous characteristics in terms of structure and properties. Accordingly, also provided is a PVA film characterised in that, when viewed using polarising light microscopy, it has a nonuniform texture consisting of distinct short range areas, e.g. 10 to 500 micrometers, each short range area showing anisotropic orientation within its area, each short range area being oriented isotropically.

摘要翻译： 提供了一种制备增塑的颗粒状聚乙烯醇（PVA）组合物的方法，其包括：在混合器中以混合速度混合足够的时间，使混合物达到至少50℃的温度：颗粒状PVA树脂 其量为混合物重量的80％至90％; 和增塑剂，其量为混合物重量的10％至20％，其中至少一部分增塑剂为水; 在混合和连续混合期间监测混合物的表观粘度，直到混合物的表观粘度达到最大值并降至基本恒定的水平，从而获得水分含量为7％ 至14％; 优选以增塑的颗粒混合物的0.05重量％至0.5重量％的量加入抗结块剂，并持续混合，直到抗结块剂与增塑的颗粒混合物混合; 并停止混合，并从混合器中除去混合物，其中混合物中的混合物在混合期间始终保持低于100℃。 增塑的颗粒组合物的性质使得其可以通过挤出和吹塑加工成具有结构和性质方面有利特征的膜。 因此，还提供了一种PVA膜，其特征在于，当使用偏振光显微镜观察时，其具有由不同的短距离区域组成的不均匀质地，例如， 10至500微米，每个短范围区域在其区域内显示各向异性取向，每个短范围区域各向同性地取向。