Samsung Display Co., Ltd.

Woowa Brothers Co., Ltd.

Silkroad C&t

Ju Hwan Kim

Gye Hwan Lim

Gi Young Kang

Dae Jin Kim

Kwang Young Park

Mun Sik Choi

Kyung Hwan Jung

Sang Kyo Shin

Cheol Yong Cha

Min Jae Lee

Young Gil Ju

A method of preparing an admixture for a plasterboard is disclosed. An admixture prepared by the method and a composition for forming a plasterboard containing the admixture are also disclosed. The method includes sulfonation of polystyrene using sulfuric acid to give an admixture including a sulfonated polystyrene (SPS)-based compound of formula 1 below. The admixture enables regulation of properties of a plasterboard, such as foam size, flowability, and setting time, by regulating a degree of sulfonation (DS) of the SPS-based compound:

Preparation method for admixture for plasterboard, admixture prepared thereby, and composition for forming plasterboard comprising same

A loading box changing system for a delivery robot includes a plurality of loading boxes in which parcels are loaded and which are divided into at least two types according to the characteristics of the parcels; and a delivery robot detachably coupled to any one of the plurality of loading boxes so as to make deliveries, wherein the delivery robot includes a loading unit to which the loading boxes are coupled, and a driving unit for driving the delivery robot, and a first loading box corresponding to the characteristics of the parcels from among the plurality of loading boxes can be selectively coupled to the loading unit on the basis of the characteristics of the parcels.

Loading box changing system for delivery robot

A bonding apparatus includes a support member configured to support a first substrate of a display panel and a connecting member, a bonding unit located above the support member and configured to compress the first substrate and the connecting member against each other using a bonding head to which a heating member is attached, and a magnetic-field generating part configured to generate a magnetic field to heat the heating member in an electromagnetic induction method.

Bonding apparatus and bonding method thereof

Growing community of inventors

Yongin-si, South Korea

Ju Hwan Kim