Skc, Inc.

Chung Ang University Industry Academic Cooperation

Nam-Il Kim

Young-Jin Lee

Sang-Il Kim

Min-Jung Lee

Kwang-Hyung Lee

Seung-Soo Woo

Joon-Hee Han

Jung-Gyu Lee

Seong-Ill Cheong

Seung-Il Park

Je-Wung Lee

Disclosed are a method and system for measuring leakage area for construction of smoke control equipment. The invention provides a system for measuring a leakage area of a test room that can include: a chamber positioned in the test room and storing air compressed by a compressor; one or more pressure sensors configured to measure a pressure change of the test room when the compressed air in the chamber is discharged instantaneously; and a gauging means configured to measure an effective leakage area in the test room by using a pressure change value of the test room detected by the one or more pressure sensors. Embodiments of the invention can enable an accurate measurement of leakage area at low cost.

System and method for measuring a leakage area for constructing a smoke-ventilation apparatus

Disclosed in this invention is a heat-shrinkable polyester film comprising a polyester film support and a coat layer formed on one or both sides of the polyester film support, said coat layer comprising a quaternary ammonium sulfate and a polysiloxane resin.

Heat-shrinkable polyester film

Apparatus for preparing a polyester resin by polymerizing a monomer produced by transesterifying a dicarboxylic acid component with a diol component while removing the vapor containing diols and other low molecular weight compound released during the polymerization, which comprises:

Apparatus for the preparation of polyester resin

The present invention relates to a biaxially oriented polyester film comprising the inorganic particulate slip agent of aluminum hydroxide or .THETA.-alumina having an average diameter ranging from 0.1005 to 3 .mu.m and Mohs hardness of 6 or more, in an amount ranging from 0.01 to 4 wt % based on the weight of the polyester, which has improved surface properties, abrasion resistance and scratch resistance.

Biaxially oriented polyester film containing an aluminum hydrate

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Seoul, South Korea

Nam-Il Kim