Sumitomo Chemical Company, Limited

Toshihiko Manami

Kensuke Naraki

Takayuki Mino

Takaya Ichimiya

Shohei Ueno

There are provided a resin pellet having high transportability in a solid state in a feeder and a method of producing the same. A resin pellet has a recess, and when a height of the resin pellet in a case in which the resin pellet is disposed on a horizontal plane in such a manner that the recess faces the horizontal plane is defined as T, and a maximum diameter of the resin pellet as viewed from a direction perpendicular to the horizontal plane is defined as L, an aspect ratio defined by L/Tis 1.2 to 1.8.

Resin pellet and method of producing resin pellet

A process or apparatus for producing polyethylene with improved film thinning and handleability involves polymerizing high-pressure ethylene using an autoclave-type reactor in the presence of a polymerization initiator. The reaction zone of the reactor has at least two different temperature sections; the polymerization initiator and the ethylene are supplied to the upstream temperature section in the reaction zone and the ethylene is polymerized to generate polyethylene; unreacted ethylene and the polyethylene generated at the upstream temperature section in the reactor flow into the downstream temperature section in communication with the upstream temperature section, so that additional polyethylene is generated at the downstream temperature section. A difference (ΔT [° C.]) between a temperature (T1 [° C.]) of the temperature section positioned upstream and a temperature (T2 [° C.]) of the temperature section positioned downstream in the reaction zone that receives the polymerization initiator and is in the autoclave-type reactor is 2.1° C. to 8.4° C.

Process for producing polyethylene

Provided are an ethylene-based polymer capable of obtaining a film in which thickness unevenness is reduced, a method of producing the ethylene-based polymer, and a film containing the ethylene-based polymer. In the ethylene-based polymer according to the present invention, the following Expressions (1) and (2) are satisfied:0.362&#x2264;&#x3b7;&#x2264;0.466&#x2003;&#x2003;(1)0.0282&#x2264;51&#x2264;0.0328&#x2003;&#x2003;(2).

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Chiba, Japan

Toshihiko Manami