High-Tech Textiles
1. Smart flame-resistant textile
1) 배경
IED(Improvised Explosive Deviced:급조폭발물)로 인한 사상자발생으로
화염방지의 필요성을 절감하였다.
2) Nomex®
듀퐁사에서 1960년대 초반에 개발한 Aromatic polyamid(aramid) fiber로 1967년부터 상업적으로 생산되기 시작. 지금은 화염방지 소재에 있어 하나의 명
strength) is lacking.
Iron frame concrete method of construction is making thereby.
Advantage of RC (Reinforced Concrete) structure is as following.
1) high economic performance
2) because resources expense is inexpensive than steel-frame structure) corrosion resistance that prevent corrosion of interior reinforcing rod because is alkalinity is security
3) have excellent modeling.
4)
Strength of composite Vf = Volume fraction of fiber
σf : Strength of fiber Vf +Vm =1
σm : Strength of matrix MMC : Boron fiber/Al (2024) alloy
300M :
Raw material of the MMC
- Boron cost : 5000$/Kg
- Al (2024) alloy : 6000 won/Kg
300M(AMS 6417) : 168$
Produced in single-filament reactors by CVD, boron fiber exhibits a unique combination of HighStrengthHigh Mod
High vacuum pump is used for many parts like process of semiconductor, IC, nuclear fusion reactor and etcetera. Recently, high vacuum is especially used in aerospace industry and process of solar cell.[1]
UltraHigh Vacuum
Definition.
Ultrahigh vacuum region is defined as the pressure lower than 10 to the minus 8.
Generally, there are three steps to make Ultrahigh vacuum (UHV), Roughin
ultra-wide design, GPS and other functions. This new offering earned high praise from the market.
6) Blu-ray™ Disc
Blu-ray Disc™ has become the standard next-generation optical disc format because Toshiba declared that they has given up HD-DVD which has been competed with Blu-ray for the next generation disc after DVD in 16, February, 2008. Fujii Yhosihide, who is in charge of Thosiba