公开(公告)号：JP2005325179A

公开(公告)日：2005-11-24

申请号：JP2004142715

申请日：2004-05-12

Applicant: Jsp Corp ,  株式会社ジェイエスピー

Inventor： TAIRA AKINOBU ,  SASAKI HIDEHIRO ,  OIKAWA MASAHARU ,  HASHIMOTO KEIICHI

IPC: C08J9/232

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing an expanded particle molding capable of being molded in a short molding cycle by using expandable particles comprising a base resin of high rigidity polypropylene-based resin, and causing neither swelling nor sink mark on the obtained EPP moldings. SOLUTION: The method for producing a polypropylene-based resin expanded particle molding comprises filling the molding space of a mold with the expandable particles comprising a substrate resin of a polypropylene-based resin having ≥1,200 MPa tensile modulus and ≥158°C melting point, heating to melt-bond the expandable particles each other, and taking out the cooled expanded particle molding from the mold, wherein the molding, cooled to have its inner temperature of from 80°C to a temperature lower by 5°C than the crystallization temperature of the base resin, is taken out from the mold. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 解决的问题：提供一种通过使用包含高刚性聚丙烯基树脂的基础树脂的可膨胀颗粒在短的成型周期中模制的膨胀颗粒成型体的制造方法，既不引起膨胀也不产生凹痕 对所获得的EPP模制品。 解决方案：聚丙烯类树脂发泡粒子成型体的制造方法包括用具有≥1,200MPa拉伸弹性模量和≥158℃的聚丙烯类树脂的基材树脂的可膨胀颗粒填充模具的成型空间 熔点，加热熔融粘合可膨胀颗粒，并从模具中取出冷却的膨胀颗粒成型体，其中模制品被冷却至内部温度为80℃至低于5℃的温度比 从模具中取出基础树脂的结晶温度。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005255735A

公开(公告)日：2005-09-22

申请号：JP2004066236

申请日：2004-03-09

Applicant: Jsp Corp ,  株式会社ジェイエスピー

Inventor： HASHIMOTO KEIICHI ,  OIKAWA MASAHARU ,  TAIRA AKINOBU ,  SASAKI HIDEHIRO

IPC: C08J9/18

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing foamed polypropylene resin particles showing excellent particle fusibility in molding by reducing the amount of a dispersant adhering to the surfaces of the foamed particles by inhibiting their blocking even when the amount of the dispersant used is decreased in the production of surface-modified foamed particles moldable with low-temperature steam.
SOLUTION: The method for producing the foamed polypropylene resin particles comprises the surface modification step of modifying the surfaces of the particles with an organic peroxide in an aqueous medium, the blowing agent impregnation step of impregnating the resin particles with a blowing agent, and the foaming step of foaming the blowing-agent-impregnated surface-modified resin particles, provided that the aqueous medium has an electric conductivity of 1 to 20 mS/m, and the aqueous medium has an iron concentration of above 0.01 to 0.7 mg/L.
COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 待解决的问题：提供一种生产发泡聚丙烯树脂颗粒的方法，其通过减少粘附在发泡颗粒表面上的分散剂的量而在模塑中显示出优异的颗粒易熔性，即使当分散剂的量 在用低温蒸汽成型的表面改性发泡颗粒的生产中使用的减少。 解决方案：发泡聚丙烯树脂颗粒的制备方法包括在水性介质中用有机过氧化物改性颗粒表面的表面改性步骤，用发泡剂浸渍树脂颗粒的发泡剂浸渍步骤， 以及使发泡剂浸渍的表面改性树脂颗粒发泡的发泡步骤，只要水性介质的电导率为1〜20mS / m，水性介质的铁浓度为0.01〜0.7mg / L. 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2005097412A

公开(公告)日：2005-04-14

申请号：JP2003332261

申请日：2003-09-24

Applicant: Jsp Corp ,  株式会社ジェイエスピー

Inventor： OIKAWA MASAHARU ,  SASAKI HIDEHIRO ,  TAIRA AKINOBU ,  HASHIMOTO KEIICHI

IPC: C08J9/18 ,  C08K5/09 ,  C08K5/101 ,  C08K5/20 ,  C08L23/10

Abstract: PROBLEM TO BE SOLVED: To provide surface-modified non-cross-linked polypropylene-based resin foamed particles which have improved secondary foamability on molding and can be fused with each other with low temperature steam. SOLUTION: The polypropylene-based resin foamed particles obtained by a surface-modifying process for dispersing polypropylene-based resin particles in a dispersing medium containing an organic peroxide and then holding the dispersing medium at a temperature which is lower than the melting point of the substrate resin of the polypropylene-based resin particles and substantially decomposes the organic peroxide, thereby decomposing the organic peroxide to obtain the substantially non-cross-linked surface-modified resin particles, and a foaming process for foaming the surface-modified resin particles with a foaming agent to obtain the substantially non-cross-linked foamed particles is characterized in that the substrate resin contains one or more compounds selected from 10 to 22C fatty acids, the amides of the fatty acids, the esters of the fatty acids and the metal salts of the fatty acids in an amount of 0.01 to 0.9 pt. wt. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：提供在成型时具有改善的二次发泡性的表面改性的非交联聚丙烯基树脂发泡颗粒，并且可以用低温蒸汽彼此熔合。 解决方案：通过用于将聚丙烯类树脂颗粒分散在含有机过氧化物的分散介质中，然后将分散介质保持在低于熔点的温度的表面改性方法获得的聚丙烯基树脂发泡颗粒 的聚丙烯类树脂颗粒的基材树脂，并且基本上分解有机过氧化物，从而分解有机过氧化物以获得基本上非交联的表面改性树脂颗粒，以及使表面改性树脂颗粒发泡的发泡方法 使用发泡剂获得基本上非交联的泡沫颗粒的特征在于，所述基材树脂含有一种或多种选自10至22C脂肪酸的化合物，脂肪酸的酰胺，脂肪酸的酯和 脂肪酸的金属盐的量为0.01至0.9pt。 重量。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JPH0892407A

公开(公告)日：1996-04-09

申请号：JP25464494

申请日：1994-09-22

Applicant: JSP CORP

Inventor： TOKORO TOSHIO ,  TSURUGAI KAZUO ,  OIKAWA MASAHARU

IPC: A47C27/14 ,  C08J9/18 ,  C08J9/22 ,  C08J9/24 ,  C08L23/04 ,  C08L101/00

Abstract: PURPOSE: To obtain expanded particles which can give expanded moldings having small shrinkage and well-balanced compressive strength and recovery properties by mixing two specified polyethylene resins with each other under specified conditions and expanding and crosslinking the resultant mixture. CONSTITUTION: These particles are obtained by expanding and crosslinking a mixture prepared by mixing 50-90wt.% polyethylene resin (A) having a density 0.920-0.935g/cm with 10-50wt.% another polyethylene resin (B) having a density of 0.940-0.970g/cm under such conditions that the following relationship holds: 0.935 ) of resin A; DB is the density (g/cm ) of resin B; DA is the weight ratio of resin A; CB is the weight ratio of resin B; and DA.CA+DB.CB is the density of the resin mixture).

公开(公告)号：JPH0873533A

公开(公告)日：1996-03-19

申请号：JP23609794

申请日：1994-09-06

Applicant: IDEMITSU PETROCHEMICAL CO ,  JSP CORP

Inventor： ITO TOSHIMICHI ,  OTA KATSUHISA ,  TSURUGAI KAZUO ,  OIKAWA MASAHARU

IPC: C08J9/16 ,  C08F4/60 ,  C08F4/654 ,  C08F210/16

Abstract: PURPOSE: To obtain a copolymer which gives a foam molding having an excellent balance among properties such as stiffness and appearance, a low molding shrinkage. and a uniform cell size. CONSTITUTION: The copolymer comprises ethylene units and 3-10C α-olefin units, has an MI of 0.1-10g/10min, a density of 910-940kg/m , a crystallinity at 115 deg.C of 11-26%, and a difference in crystallinity between 113 deg.C and 117 deg.C of 7.0% or lower, and is prepd. pref. by compounding 2-20wt.% polymer component having a density of 933kg/m and comprising polyethylene or an ethylene/3-10C α-olefin copolymer, 30-80wt.% ethylene/3-10C α-olefin copolymer having a density of 920-942kg/m , and 15-55wt.% ethylene/3-10C α-olefin copolymer having a density of 860-922kg/m .

公开(公告)号：JPH06271701A

公开(公告)日：1994-09-27

申请号：JP8267693

申请日：1993-03-17

Applicant: JSP CORP

Inventor： TOKORO TOSHIO ,  TSURUGAI KAZUO ,  SASAKI HIDEHIRO ,  OIKAWA MASAHARU

IPC: C08J9/18 ,  C08J9/22 ,  C08L23/06 ,  C08L23/08

Abstract: PURPOSE:To prepare expandable uncrosslinked polyethylene resin particles which can give pre-expanded particles capable of realizing a high expansion ratio in the production of expanded particles, being molded without being subjected to any special treatment for imparting internal pressure and giving a high-expansion-ratio molding excellent in surface smoothness and fusibility when molded. CONSTITUTION:The expandable particles are made of an uncrosslinked polyethylene resin having a density of above 0.920g/cm and satisfying the relationship: q1/qtotal>=0.5 [wherein q1 (J/g) is the heat absorption at 50 to melting point -10 deg.C in a DSC curve, and qtotal is the total heat absorption at 50 deg.C to melting completion temperature, provided that the curve is prepared by heating 1-10mmg of this resin to 200 deg.C at a rate of 10 deg.C/min with a differential scanning calorimeter, cooling the resin to room temperature at a rate of 10 deg.C/min and heating it again to 200 deg.C at a rate of 10 deg./min] and having a temperature width (w) of 5 deg.C or above at a height equal to 1/2 of the peak height (h) on the higher temperature side.

公开(公告)号：JPH06192463A

公开(公告)日：1994-07-12

申请号：JP35755292

申请日：1992-12-24

Applicant: JSP CORP

Inventor： KUWABARA HIDEKI ,  TSURUGAI KAZUO ,  NAGARESUGI TETSUJI ,  OIKAWA MASAHARU ,  SASAKI HIDEHIRO ,  SHIOTANI AKIRA

IPC: C08J9/18

Abstract: PURPOSE:To obtain a resin particle which can easily give a foam of high expansion ratio in spite of the use of an inorganic gas blowing agent and containing no ultra-fine cells by dispersing a polyolefin containing an organic substance in a dispersion medium containing a dissolved inorganic chlorine compound. CONSTITUTION:A process for producing expanded polyolefin particles by dispersing polyolefin resin particles (e.g. linear low-density polyethylene) containing an inorganic substance (e.g. aluminum hydroxide) in a dispersion medium (e.g. tricalcium phosphate) in the presence of a blowing agent (e.g. carbon dioxide) in a sealed container and releasing the resultant polyolefin resin particles and the dispersion medium at a temperature equal to or higher than the softening point of the particles into an atmosphere having a pressure lower than that in the container, wherein 0.2-1.5wt.% inorganic chlorine compound (e.g. sodium chloride) is added to the dispersion medium. According to this process, high- expansion ratio expanded particles can be easily obtained even when an inorganic gas blowing agent such as carbon dioxide is used, and the obtained particles do hot contain ultrafine particles.