公开(公告)号：US4931477A

公开(公告)日：1990-06-05

申请号：US282137

申请日：1988-12-09

申请人： Hitoshi Shiiki ,  Minoru Tada ,  Kyoichi Nakamura

发明人： Hitoshi Shiiki ,  Minoru Tada ,  Kyoichi Nakamura

IPC分类号： B29B9/12 ,  C08J9/22 ,  C08J9/228 ,  C08L23/10

CPC分类号： C08J9/228 ,  C08J2323/10 ,  C08L23/10 ,  Y10S264/07 ,  Y10S264/09 ,  Y10S264/16

摘要： The present invention provides polypropylene resin pre-expanded beads formed by shrinking polypropylene resin pre-expanded beads originally having a bulk density of not higher than 0.0930 g/cc to give then a bulk volume ratio of 10-75% at the normal temperature and the normal pressure, a manufacturing method thereof and an expansion-molding method with the aforementioned pre-expanded beads. According to this invention, it is possible to greatly reduce storing and transporting costs per unit weight of pre-expanded beads.

公开(公告)号：US4720509A

公开(公告)日：1988-01-19

申请号：US53662

申请日：1987-05-26

申请人： Kyoichi Nakamura

发明人： Kyoichi Nakamura

IPC分类号： B29B9/12 ,  B29C44/00 ,  B29K23/00 ,  B29K105/04 ,  C08J9/18 ,  C08J9/22 ,  C08J9/228 ,  C08L23/10

CPC分类号： C08J9/228 ,  C08J9/18 ,  C08J2323/10 ,  C08L23/10 ,  Y10S264/09 ,  Y10S264/16

摘要： A pre-expanded particle of a propylene resin having two melting temperatures as determined by DSC, the heat of fusion for the peak based on the higher melting temperature being 0.5 to 2.3 cal/g. By using the pre-expanded particles of the propylene resin of the invention, foamed articles having excellent surface appearance, small dimentional shrinkage can be easily obtained without the procedure for giving the internal pressure.

摘要翻译： 通过DSC测定的具有两个熔融温度的丙烯树脂的预发泡颗粒，基于较高熔融温度的峰的熔化热为0.5-2.3cal / g。 通过使用本发明的丙烯树脂的预发泡粒子，可以容易地获得具有优异的表面外观，小的收缩率的发泡制品，而不需要提供内部压力的程序。

公开(公告)号：US4687641A

公开(公告)日：1987-08-18

申请号：US720820

申请日：1985-04-08

申请人： Hirofumi Maeda ,  Kyoichi Nakamura ,  Hisatoshi Fukui

发明人： Hirofumi Maeda ,  Kyoichi Nakamura ,  Hisatoshi Fukui

IPC分类号： B29C44/34 ,  C08J9/228 ,  C08J11/02 ,  C08J9/18 ,  B01J10/00

CPC分类号： B29C44/3461 ,  C08J11/02 ,  C08J9/228 ,  Y10S264/09

摘要： A process and apparatus for preparing pre-expanded particles of a thermoplastic resin which comprises; heating under an elevated pressure an aqueous dispersion comprising thermoplastic resin particles containing a volatile foaming agent and an aqueous medium in a pressure vessel; releasing the dispersion from the pressure vessel into a space within a sealed low-pressure vessel wherein the pressure is lower than that in the pressure vessel, whereby expanding the thermoplastic resin particles to give pre-expanded particles; and simultaneously recovering the foaming agent volatilized from the thermoplastic resin particles by discharging the foaming agent out of the space in the low-pressure vessel with controlling the pressure in the low-pressure vessel to substantially a given pressure. According to the process, the release of the volatile foaming agent into the air is prevented.

摘要翻译： 一种制备热塑性树脂预发泡颗粒的方法和装置，包括： 在高压下加热包含在压力容器中含有挥发性发泡剂和水性介质的热塑性树脂颗粒的水分散体; 将分散体从压力容器释放到密封的低压容器内的空间，其中压力低于压力容器中的压力，由此使热塑性树脂颗粒膨胀以产生预发泡颗粒; 同时通过将低压容器内的压力控制在基本给定的压力下，将发泡剂从低压容器的空间排出，同时回收从热塑性树脂颗粒挥发的发泡剂。 根据该方法，可以防止挥发性发泡剂向空气中的释放。

公开(公告)号：US4525485A

公开(公告)日：1985-06-25

申请号：US647659

申请日：1984-09-06

申请人： Hirofumi Maeda ,  Kyoichi Nakamura ,  Hisatoshi Fukui

发明人： Hirofumi Maeda ,  Kyoichi Nakamura ,  Hisatoshi Fukui

IPC分类号： B29C44/34 ,  C08J9/228 ,  C08J11/02 ,  C08J9/22

CPC分类号： B29C44/3461 ,  C08J11/02 ,  C08J9/228 ,  Y10S264/09

摘要： A process for preparing pre-expanded particles of a thermoplastic resin which comprises; heating under an elevated pressure an aqueous dispersion comprising thermoplastic resin particles containing a volatile foaming agent and an aqueous medium in a pressure vessel; releasing the dispersion from the pressure vessel into a space within a sealed low-pressure vessel wherein the pressure is lower than that in the pressure vessel, whereby expanding the thermoplastic resin particles to give pre-expanded particles; and simultaneously recovering the foaming agent volatilized from the thermoplastic resin particles by discharging the foaming agent out of the space in the low-pressure vessel with controlling the pressure in the low-pressure vessel to substantially a given pressure. According to the process, the release of the volatile foaming agent into the air is prevented.

摘要翻译： 一种制备热塑性树脂预发泡颗粒的方法，包括： 在高压下加热包含在压力容器中含有挥发性发泡剂和水性介质的热塑性树脂颗粒的水分散体; 将分散体从压力容器释放到密封的低压容器内的空间，其中压力低于压力容器中的压力，由此使热塑性树脂颗粒膨胀以产生预发泡颗粒; 同时通过将低压容器内的压力控制在基本给定的压力下，将发泡剂从低压容器的空间排出，同时回收从热塑性树脂颗粒挥发的发泡剂。 根据该方法，可以防止挥发性发泡剂向空气中的释放。

公开(公告)号：US4298706A

公开(公告)日：1981-11-03

申请号：US76614

申请日：1979-09-18

申请人： Takashi Ueno ,  Kyoichi Nakamura

发明人： Takashi Ueno ,  Kyoichi Nakamura

IPC分类号： C08J9/04 ,  C08J9/00 ,  B29D27/00

CPC分类号： C08J9/0061 ,  C08J2323/10 ,  C08J2409/00 ,  Y10S264/05 ,  Y10S264/16 ,  Y10S521/908 ,  Y10S521/909

摘要： Foams of polypropylene resin composition having remarkably improved extrusion foaming characteristics are prepared by a non-crosslinking extrusion foaming process comprising mixing and kneading polypropylene resin and 1,2-polybutadiene resin so that 1,2-polybutadiene resin reacts under the influence of the heat and shearing stress in the extruder, and extruding thereafter.

摘要翻译： 通过非交联挤出发泡方法制备具有显着改善的挤出发泡特性的聚丙烯树脂组合物的泡沫，其包括将聚丙烯树脂和1,2-聚丁二烯树脂混合和捏合，使得1,2-聚丁二烯树脂在热和 在挤出机中剪切应力，然后挤出。

公开(公告)号：US06596782B1

公开(公告)日：2003-07-22

申请号：US09155544

申请日：1998-09-25

申请人： Kenji Mogami ,  Tsuyoshi Mihayashi ,  Kyoichi Nakamura ,  Naruhiko Akamatsu

发明人： Kenji Mogami ,  Tsuyoshi Mihayashi ,  Kyoichi Nakamura ,  Naruhiko Akamatsu

IPC分类号： C08J916

CPC分类号： C08J9/18 ,  B29C44/3461 ,  C08J9/0061 ,  C08J2203/10 ,  C08J2323/02

摘要： A water-containing polyolefin resin composition containing a polyolefin resin and a hydrophilic polymer and having a water content of 1 to 50% by weight which is suitable for use in preparation of polyolefin resin pre-expanded particles, and pre-expanded particles of a polyolefin resin prepared by pre-expanding the water-containing polyolefin resin composition the particles having a an apparent expansion ratio of 5 to 60, a closed cell ratio of 80 to 100% and an average cell diameter of 50 to 500 &mgr;m. The pre-expanded particles can be prepared without using a volatile blowing agent by dispersing resin particles made of a polyolefin resin composition containing a polyolefin resin and a hydrophilic polymer into an aqueous dispersion medium in a closed vessel to form a dispersion, heating to a temperature not lower than the softening point of the polyolefin resin to produce water-containing resin particles having a water content of 1 to 50% by weight, and releasing the aqueous dispersion from the closed vessel into a lower pressure than the inner pressure of the closed vessel, thereby expanding the water-containing resin particles. When the releasing of the dispersion from the vessel is conducted after raising the inner pressure to 25 to 75 kg/cm2G by introducing nitrogen gas, air or an inorganic gas including them as a main component into the vessel, pre-expanded particles providing foams having good physical properties and a high expansion ratio are obtained.

摘要翻译： 含有聚烯烃树脂和亲水性聚合物的水含量聚烯烃树脂组合物，其水含量为1-50重量％，其适用于制备聚烯烃树脂预发泡颗粒和聚烯烃预发泡颗粒 通过将含水聚烯烃树脂组合物的表观膨胀率为5〜60，闭孔率为80〜100％，平均泡孔直径为50〜500μm的颗粒预膨胀而制备的树脂。 可以通过将含有聚烯烃树脂和亲水性聚合物的聚烯烃树脂组合物制成的树脂颗粒分散在密闭容器中的水性分散介质中而不使用挥发性发泡剂来制备预发泡颗粒，以形成分散体，加热到温度 不低于聚烯烃树脂的软化点，以产生水含量为1至50重量％的含水树脂颗粒，并将水分散体从密闭容器中释放到比密封容器的内部压力低的压力 从而使含水树脂颗粒膨胀。 当通过将氮气，空气或其中包含它们的无机气体作为主要成分将内部压力升高到25至75kg / cm2G之后进行容器的分散时，预发泡颗粒提供具有 获得良好的物理性能和高膨胀率。

公开(公告)号：US06593047B2

公开(公告)日：2003-07-15

申请号：US09942654

申请日：2001-08-31

申请人： Jun Azuma ,  Yukimasa Watanabe ,  Hisakazu Honma ,  Ayako Yashima ,  Maki Uchida ,  Kyoichi Nakamura

发明人： Jun Azuma ,  Yukimasa Watanabe ,  Hisakazu Honma ,  Ayako Yashima ,  Maki Uchida ,  Kyoichi Nakamura

IPC分类号： G03G505

CPC分类号： G03G5/0564 ,  G03G5/0578 ,  G03G5/0609 ,  G03G5/0614 ,  G03G5/0616

摘要： A single-layer type electrophotosensitive material comprising a conductive substrate and a photosensitive layer made of a binder resin containing at least an electric charge generating material and a hole transferring material and an electron transferring material as an electric charge transferring material, which is formed on the conductive substrate, characterized in that the binder resin contains a polycarbonate resin having a repeating structural unit represented by the general formula [1] and the solid content of the hole transferring material and the electron transferring material is not less than 30% by weight and not more than 50% by weight relative to the entire solid content, exhibits good wear resistance with respect to the photosensitive layer and is also superior in durability.

公开(公告)号：US06221926B1

公开(公告)日：2001-04-24

申请号：US09319966

申请日：1999-06-14

申请人： Hidekazu Oohara ,  Hidehiro Yamaguchi ,  Kyoichi Nakamura

发明人： Hidekazu Oohara ,  Hidehiro Yamaguchi ,  Kyoichi Nakamura

IPC分类号： C08J918

CPC分类号： C08J9/18 ,  B29B9/10 ,  C08J2203/14 ,  C08J2325/04 ,  C08J2351/00

摘要： Foamable modified polystyrene resin particles (E) comprising a particle of a modified polystyrene resin (C) containing a blowing agent (D), wherein the modified polystyrene resin (C) comprises conjugated diene polymer rubber particles (B) dispersed uniformly throughout a polystyrene resin (A) and when the foamable modified polystyrene resin particle (E) is expanded, there is substantially no deformation of the rubber particles (B) before and after the expansion. A foamed article of a modified polystyrene resin which has a cell membrane of the modified polystyrene resin comprising a polystyrene resin and conjugated diene polymer rubber particles dispersed uniformly throughout the polystyrene resin and has a fusion rate of not less than 50%, wherein the rubber particles maintain substantially spherical form in the cell membrane. According to the present invention, the foamed article of the modified polystyrene resin having break resistance and fusion rate which are equal to those of a high impact polystyrene foamed article can be provided at low cost.

摘要翻译： 包含发泡剂（D）的改性聚苯乙烯树脂（C）的颗粒的可发泡改性聚苯乙烯树脂颗粒（E），其中改性聚苯乙烯树脂（C）包括均匀分散在聚苯乙烯树脂中的共轭二烯聚合物橡胶颗粒（B） （A），发泡性改性聚苯乙烯树脂粒子（E）膨胀时，膨胀前后橡胶粒子（B）基本上不变形。 改性聚苯乙烯树脂的泡沫制品，其具有改性聚苯乙烯树脂的细胞膜，其包含均匀分散在聚苯乙烯树脂中的聚苯乙烯树脂和共轭二烯聚合物橡胶颗粒，并且具有不低于50％的熔融率，其中橡胶颗粒 在细胞膜中保持基本上球形。 根据本发明，可以以低成本提供具有抗冲击性聚苯乙烯发泡体的耐破坏性和熔融率等同的改性聚苯乙烯树脂的发泡体。

公开(公告)号：US4810440A

公开(公告)日：1989-03-07

申请号：US66363

申请日：1987-06-25

申请人： Hiroyuki Yoshida ,  Kyoichi Nakamura

发明人： Hiroyuki Yoshida ,  Kyoichi Nakamura

IPC分类号： B29B11/14 ,  B29C44/34 ,  B29K105/04 ,  C08J9/16 ,  C08J9/22

CPC分类号： B29C44/3461 ,  B29K2023/00 ,  Y10S264/05 ,  Y10S264/09 ,  Y10S264/13

摘要： In a process for pre-expanding thermoplastic resin particles which comprises releasing into a low pressure zone a mixture of water and thermoplastic resin particles containing a volatile blowing agent, the mixture being maintained at an elevated temperature under pressure in a pressure vessel, the improvement which comprises releasing the mixture through a plurality of orifice plates in series in the direction of release of the mixture. According to the process of the present invention, the average cell diameter of the obtained pre-expanded particles is larger than that of the pre-expanded particles obtained by means of conventional methods. Therefore, the molded articles prepared from the pre-expanded particles according to the present invention are small in shrinkage and excellent in surface appearance, and are utilizable for use as shock absorbing, wrapping materials or structural materials such as impact-absorbing materials for cars (for example, a car bumper), which require excellent dimensional precision and heat insulating building materials.

摘要翻译： 在预膨胀热塑性树脂颗粒的方法中，其包括将包含挥发性发泡剂的水和热塑性树脂颗粒的混合物释放到低压区域中，将该混合物在压力容器中在高压下保持在升高的温度， 包括通过多个孔板在混合物的释放方向上串联释放混合物。 根据本发明的方法，所获得的预发泡颗粒的平均泡孔直径大于通过常规方法获得的预发泡颗粒的平均泡孔直径。 因此，根据本发明的由预发泡颗粒制备的模塑制品的收缩率小，表面外观优异，并且可用作减震，包装材料或用于汽车的冲击吸收材料的结构材料 例如汽车保险杠），其需要优异的尺寸精度和隔热建筑材料。

公开(公告)号：US4686087A

公开(公告)日：1987-08-11

申请号：US700180

申请日：1985-02-11

申请人： Hirofumi Maeda ,  Kyoichi Nakamura ,  Toshihiro Hatamoto

发明人： Hirofumi Maeda ,  Kyoichi Nakamura ,  Toshihiro Hatamoto

IPC分类号： B29B15/00 ,  B29C44/34 ,  B29K25/00 ,  B29K105/04 ,  C08J9/16 ,  C08J9/228 ,  C08J11/02 ,  C08J9/18 ,  B01J10/00

CPC分类号： C08J11/02 ,  B29C44/3461 ,  C08J9/228 ,  Y10S264/09

摘要： A process and apparatus for preparing pre-expanded particles of a thermoplastic resin which comprises; heating under an elevated pressure an aqueous dispersion comprising thermoplastic resin particles containing a volatile foaming agent and an aqueous medium in a pressure vessel; releasing the dispersion from the pressure vessel into a space within a sealed low-pressure vessel wherein the pressure is lower than that in the pressure vessel and the space is sealed with an aqueous medium which exists in the lower portion of the vessel and communicates with the outside of the vessel, whereby expanding the thermoplastic resin particles to give pre-expanded particles; and sinking the resulting pre-expanded particles under the aqueous medium by means of a rotary impeller provided in the pressure vessel so that the pre-expanded particles are taken out of the low-pressure vessel through the aqueous medium towards the outside of the vessel, while recovering the foaming agent volatilized from the thermoplastic resin particles by discharging the foaming agent out of the space in the low-pressure vessel with controlling the pressure in the low-pressure vessel to substantially a given pressure. According to the process, the release of the volatile foaming agent in the air is prevented, the productivity is increased and extraneous matters on the pre-expanded particles are removed.

摘要翻译： 一种制备热塑性树脂预发泡颗粒的方法和装置，包括： 在高压下加热包含在压力容器中含有挥发性发泡剂和水性介质的热塑性树脂颗粒的水分散体; 将分散体从压力容器释放到密封的低压容器内的空间中，其中压力低于压力容器中的空间，并且空间用存在于容器下部的水性介质密封，并与容器的下部连通 在容器外部，由此使热塑性树脂颗粒膨胀以产生预发泡颗粒; 并且通过设置在压力容器中的旋转叶轮在水介质下沉积所得到的预发泡颗粒，使得预发泡颗粒从低压容器中通过水性介质从容器外部取出， 同时通过将低压容器中的压力控制在基本给定的压力下，将发泡剂从低压容器的空间排出，从而恢复从热塑性树脂颗粒挥发的发泡剂。 根据该方法，防止挥发性发泡剂在空气中的释放，提高生产率，并且除去预发泡颗粒上的外来物质。