公开(公告)号：US20100295205A1

公开(公告)日：2010-11-25

申请号：US12740195

申请日：2008-10-31

Applicant: Takeharu Isaki ,  Takeshi Karino ,  Noriyuki Katoh

Inventor： Takeharu Isaki ,  Takeshi Karino ,  Noriyuki Katoh

IPC: B29B9/06

CPC classification number: B29B9/065 ,  B29K2023/06 ,  B29K2023/12

Abstract: A process for the production of polyolefin pellets by cuffing a raw material which contains a molten polyolefin resin and which is extruded from an extrusion orifice (121) of a die (12) into predetermined lengths with an underwater cutter (14) which is set in close vicinity to the die face of the die (12) and which rotates in water, satisfying the following requirements (A) to (C): (A) the average linear velocity (u) of the raw material passing through the extrusion orifice (121) as defined by the equation (Eq-1) is 50 to 650 mm/sec, (B) the fictitious aspect ratio (r) a L as defined by the equation (Eq-2) is 1.6 or below, and (C) the r/u value is 0.002 or above wherein Q is extrusion rate (mm3/sec) of the raw material per extrusion orifice; R is radius (mm) of the extrusion orifice; and t is cutting time (sec) defined as an inverse number of the product of the number of revolution of the under-water cutter and the number of blades of the cutter.

Abstract translation: 一种通过将包含熔融聚烯烃树脂的原料通过将模具（12）的挤压孔（121）挤压成预定长度的原料（其设置在 靠近模具（12）的模具面并在水中旋转，满足以下要求（A）至（C）：（A）通过挤出孔口的原料的平均线速度（u） 由式（Eq-1）定义的式（121）为50〜650mm / sec，（B）由式（Eq-2）定义的虚构纵横比（r）a L为1.6以下，（C ）r / u值为0.002以上，其中Q是每个挤出孔口的原料的挤出速率（mm 3 / sec）; R是挤出孔的半径（mm）; t是切割时间（sec），其定义为水下切割机的转数与切割器的叶片数的乘积的倒数。

公开(公告)号：US08557154B2

公开(公告)日：2013-10-15

申请号：US12740195

申请日：2008-10-31

Applicant: Takeharu Isaki ,  Takeshi Karino ,  Noriyuki Katoh

Inventor： Takeharu Isaki ,  Takeshi Karino ,  Noriyuki Katoh

IPC: B29B9/06

CPC classification number: B29B9/065 ,  B29K2023/06 ,  B29K2023/12

Abstract: A process for the production of polyolefin pellets by cuffing a raw material which contains a molten polyolefin resin and which is extruded from an extrusion orifice (121) of a die (12) into predetermined lengths with an underwater cutter (14) which is set in close vicinity to the die face of the die (12) and which rotates in water, satisfying the following requirements (A) to (C): (A) the average linear velocity (u) of the raw material passing through the extrusion orifice (121) as defined by the equation (Eq-1) is 50 to 650 mm/sec, (B) the fictitious aspect ratio (r) as defined by the equation (Eq-2) is 1.6 or below, and (C) the r/u value is 0.002 or above wherein Q is extrusion rate (mm3/sec) of the raw material per extrusion orifice; R is radius (mm) of the extrusion orifice; and t is cutting time (sec) defined as an inverse number of the product of the number of revolution of the under-water cutter and the number of blades of the cutter.

Abstract translation: 一种通过将包含熔融聚烯烃树脂的原料通过将模具（12）的挤压孔（121）挤压成预定长度的原料（其设置在 靠近模具（12）的模具面并在水中旋转，满足以下要求（A）至（C）：（A）通过挤出孔口的原料的平均线速度（u） 由式（Eq-1）定义的式（121）为50〜650mm / sec，（B）由式（Eq-2）定义的虚构纵横比（r）为1.6以下，（C） r / u值为0.002以上，Q为挤出口的原料的挤出速度（mm 3 /秒） R是挤出孔的半径（mm）; t是切割时间（sec），其定义为水下切割机的转数与切割器的叶片数的乘积的倒数。