公开(公告)号：US06572806B1

公开(公告)日：2003-06-03

申请号：US09672057

申请日：2000-09-29

申请人： Satoshi Oya ,  Hidetsugu Sawada ,  Akio Toyoda ,  Kosuke Arai ,  Nobuyuki Konishi ,  Koji Adachi

发明人： Satoshi Oya ,  Hidetsugu Sawada ,  Akio Toyoda ,  Kosuke Arai ,  Nobuyuki Konishi ,  Koji Adachi

IPC分类号： B29C4706

CPC分类号： A22C13/0013 ,  A22C2013/002 ,  A22C2013/0053 ,  A22C2013/0083 ,  B32B27/30 ,  Y10S428/91 ,  Y10T428/2495 ,  Y10T428/31909

摘要： A multilayered biaxially-oriented styrene based resin sheet comprises; a styrene based resin layer (A) as at least two outer layers formed by the polymerization of methacrylic acid in a weight proportion of 1˜3.5% and styrene, and a styrene based resin layer (B) formed from polystyrene which is sandwiched between the outer layers and for which the loss tangent (tan &dgr;) maximum peak value temperature for dynamic viscoelasticity measurement is 6.5˜25° C. lower than that for the resin of the resin layer (A). The sheet has excellent properties of transparency and external appearance, can be reused by recovering and moreover does not suffer from raindrop occurrence by secondary forming.

摘要翻译： 多层双轴取向苯乙烯基树脂片包括： 苯乙烯基树脂层（A），其通过以重量比为1〜3.5％的甲基丙烯酸与苯乙烯的聚合形成的至少两个外层和由聚苯乙烯形成的苯乙烯基树脂层（B）夹在 外层，动态粘弹性测量的损耗角正切（tanδ）最大峰值温度比树脂层（A）的树脂低6.5〜25℃。 该片具有优异的透明性和外观性质，可以通过回收再利用，而且通过二次成型不会发生雨滴。

公开(公告)号：US5403897A

公开(公告)日：1995-04-04

申请号：US217719

申请日：1994-03-25

申请人： Hiroshi Ebato ,  Satoshi Oya ,  Yasutoshi Kakizawa ,  Hideyuki Furuta ,  Kosuke Arai

发明人： Hiroshi Ebato ,  Satoshi Oya ,  Yasutoshi Kakizawa ,  Hideyuki Furuta ,  Kosuke Arai

IPC分类号： C08G63/08 ,  C08G63/60 ,  C08G63/78 ,  C08L67/00 ,  C08L67/02 ,  C08L67/04 ,  C08F20/00 ,  B32B27/36

CPC分类号： C08L67/00 ,  C08G63/60 ,  Y10T428/31786

摘要： A process for producing a lactic acid-based copolyester by the ring-opening copolymerization and transesterification of a lactide (A) with an aromatic polyester (B) and/or an aliphatic polyester (C) in the presence of a ring-opening polymerization catalyst (D), and a packaging material comprising the lactic acid-based copolyester obtained by the process are disclosed. According to the present invention, a lactic acid-based degradable copolyester which has a sufficiently high molecular weight and satisfactory toughness and also has suitable rigidity, pliability, and transparency according to applications can be produced. Further, a general-purpose packaging material, e.g., a sheet or film, which comprises the lactic acid-based copolyester produced by the process and is excellent in formability, degradability, and transparency can also be produced.

摘要翻译： 一种通过在开环聚合催化剂存在下通过丙交酯（A）与芳族聚酯（B）和/或脂族聚酯（C）的开环共聚和酯交换反应生产乳酸基共聚酯的方法 （D），以及包含通过该方法得到的乳酸类共聚聚酯的包装材料。 根据本发明，可以制备具有足够高的分子量和令人满意的韧性并且根据应用具有合适的刚性，柔韧性和透明度的乳酸类可降解共聚酯。 此外，还可以制造包含通过该方法制备并且成形性，降解性和透明性优异的乳酸类共聚酯的通用包装材料，例如片材或薄膜。

公开(公告)号：US6153308A

公开(公告)日：2000-11-28

申请号：US251405

申请日：1999-02-17

申请人： Satoshi Oya ,  Hidetsugu Sawada ,  Akio Toyoda ,  Kosuke Arai ,  Nobuyuki Konishi ,  Koji Adachi

发明人： Satoshi Oya ,  Hidetsugu Sawada ,  Akio Toyoda ,  Kosuke Arai ,  Nobuyuki Konishi ,  Koji Adachi

IPC分类号： A22C13/00 ,  B29C55/12 ,  B29K25/00 ,  B29L9/00 ,  B32B27/30 ,  C08F12/08 ,  C08L25/04 ,  B32B27/08

CPC分类号： A22C13/0013 ,  B32B27/30 ,  A22C2013/002 ,  A22C2013/0053 ,  A22C2013/0083 ,  Y10S428/91 ,  Y10T428/2495

摘要： A multilayered biaxially-oriented styrene based resin sheet comprises; a styrene based resin layer (A) as at least two outer layers formed by the polymerization of methacrylic acid in a weight proportion of 1-3.5% and styrene, and a styrene based resin layer (B) formed from polystyrene which is sandwiched between the outer layers and for which the loss tangent (tan .delta.) maximum peak value temperature for dynamic viscoelasticity measurement is 6.5-25.degree. C. lower than that for the resin of the resin layer (A). The sheet has excellent properties of transparency and external appearance, can be reused by recovering and moreover does not suffer from raindrop occurrence by secondary forming.

摘要翻译： 多层双轴取向苯乙烯基树脂片包括： 苯乙烯基树脂层（A）作为通过甲基丙烯酸以1-3.5重量％的比例聚合形成的至少两个外层，苯乙烯和由聚苯乙烯形成的苯乙烯基树脂层（B）夹在 外层，动态粘弹性测量的损耗角正切（tanδ）最大峰值温度比树脂层（A）的树脂低6.5-25℃。 该片具有优异的透明性和外观性质，可以通过回收再利用，而且通过二次成型不会发生雨滴。

公开(公告)号：US06255388B1

公开(公告)日：2001-07-03

申请号：US09253769

申请日：1999-02-22

申请人： Hirofumi Yamada ,  Yoshiaki Murata ,  Hidetsugu Sawada ,  Kosuke Arai

发明人： Hirofumi Yamada ,  Yoshiaki Murata ,  Hidetsugu Sawada ,  Kosuke Arai

IPC分类号： C08G6391

CPC分类号： C08J5/18 ,  B29C55/04 ,  B29K2096/02 ,  C08J2351/04 ,  Y10S264/73

摘要： A shrink film is provided which is superior in glossiness, mechanical strength, and rigidity, and which is also provided with a property of preventing natural shrinkage. The shrink film with excellent properties is produced by using a resin composition which is obtained by graft polymerization of copolymers of styrene and butadiene with styrene, methylmethacrylate, and butylacrylate. The thus obtained resin composition is extruded after melting and kneading, and drawn into a film in two directions, and exposed at a temperature within a temperature range for the thermal setting so as to obtain the orientation according to ASTM D1504 of the shrink film in range of 1.5 to 5.0 MPa.

摘要翻译： 提供了光泽度，机械强度和刚性优异的收缩膜，并且还具有防止自然收缩的性质。 通过使用通过苯乙烯和丁二烯的共聚物与苯乙烯，甲基丙烯酸甲酯和丙烯酸丁酯的接枝聚合而获得的树脂组合物来制造具有优异性能的收缩膜。 将这样得到的树脂组合物在熔融和捏合之后被挤出，并在两个方向上拉伸成薄膜，并在温热范围内的温度下曝光，以获得根据ASTM D1504的收缩膜的取向范围 为1.5〜5.0MPa。