Lg Chem, Ltd

Byeong Joon Jeong

Young Hyun Choi

Gyu Il Lee

Eung Seob Yeom

Woo Seon Choi

Worl Yong Kim

Dong Chul Shim

Soongin Kim

Moon Gon Jeong

Jae Hyun Shin

Joon Hyoung Park

Jung Chul Shin

Wooseon Choi

Se Young Jang

An injection mold, processes for use thereof and products therefrom. The injection mold can include: a transfer mold, which is disposed in front of the injection-molded product and forms a pattern on a front surface of the injection-molded product; and a rear surface mold, which is disposed behind the injection-molded product. A rear surface part of the rear surface mold, which faces a rear surface of the injection-molded product, includes a heat dissipating metal. The heat dissipating metal includes a PORCERAX® material. An embossing pattern is formed on a front surface part of the transfer mold, which faces the front surface of the injection-molded product, so that the pattern is formed on the front surface of the injection-molded product.

Injection mold

The present invention relates to a graft copolymer and a method for preparing the same, wherein the graft copolymer has merits of a superior storage convenience compared to existing dry powder and a high whiteness index, and thus may be widely applied to various fields.

Graft copolymer and method for preparing same

An extruder configured to extrude a solid raw material containing moisture includes a barrel, a hopper coupled to one side of the barrel, a discharge port, a screw, vent disposed between the hopper and the discharge port to discharge vapor generated within the barrel; and a heater mounted on the barrel to heat the raw material. Raw material introduced into the barrel through the hopper is heated by the heater while being transferred within the barrel through the screw. A kneading zone, in which raw materials transferred by the screw threads are compressed, is formed on the screw. Since the raw material is melted within the barrel, a heating temperature of the heater and an axial rotation speed of the screw are controlled so that a sealing membrane that shields an inner transverse section of the barrel is formed from the liquid raw material in the kneading zone.

Extruder

An extruder configured to extrude a solid raw material containing moisture includes a barrel, a hopper, a discharge port, and a slot portion, through which the inside and outside of the barrel communicate each other, is provided between the discharge port and the hopper; a screw, and a heater mounted on the barrel to heat the raw material. Raw material introduced into the barrel through the hopper is heated by the heater while being transferred within the barrel through the screw. A kneading zone, in which raw materials transferred by the screw threads are compressed, is formed on the screw. Since the raw material is melted within the barrel, a heating temperature of the heater and an axial rotation speed of the screw are controlled so that a sealing membrane that shields an inner transverse section of the barrel is formed from the liquid raw material in the kneading zone.

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Daejeon, South Korea

Byeong Joon Jeong