2012년 6월 20일 수요일
NBR
Nitrile butadiene rubber (NBR) is a family of unsaturated copolymers of 2-propenenitrile and various butadiene monomers (1,2-butadiene and 1,3-butadiene). Although its physical and chemical properties vary depending on the polymer’s composition of nitrile, this form of synthetic rubber is generally resistant to oil, fuel, and other chemicals (the more nitrile within the polymer, the higher the resistance to oils but the lower the flexibility of the material).
It is used in the automotive and aeronautical industry to make fuel and oil handling hoses, seals, and grommets. It is used in the nuclear industry to make protective gloves. NBR’s ability to withstand a range of temperatures from -40 °C to +108 °C makes it an ideal material for aeronautical applications. Nitrile butadiene is also used to create moulded goods, footwear, adhesives, sealants, sponges, expanded foams, and floor mats.
Its resilience makes NBR a useful material for disposable lab, cleaning, and examination gloves. Nitrile rubber is more resistant than natural rubber to oils and acids, but has inferior strength and flexibility. Nitrile gloves are nonetheless three times more puncture-resistant than natural rubber gloves.[1]
Nitrile rubber is generally resistant to aliphatic hydrocarbons. Nitrile, like natural rubber, can be attacked by ozone, aromatic hydrocarbons, ketones, esters and aldehydes.
It is used in the automotive and aeronautical industry to make fuel and oil handling hoses, seals, and grommets. It is used in the nuclear industry to make protective gloves. NBR’s ability to withstand a range of temperatures from -40 °C to +108 °C makes it an ideal material for aeronautical applications. Nitrile butadiene is also used to create moulded goods, footwear, adhesives, sealants, sponges, expanded foams, and floor mats.
Its resilience makes NBR a useful material for disposable lab, cleaning, and examination gloves. Nitrile rubber is more resistant than natural rubber to oils and acids, but has inferior strength and flexibility. Nitrile gloves are nonetheless three times more puncture-resistant than natural rubber gloves.[1]
Nitrile rubber is generally resistant to aliphatic hydrocarbons. Nitrile, like natural rubber, can be attacked by ozone, aromatic hydrocarbons, ketones, esters and aldehydes.
택시 동맹휴업
난 아주 급한 일 있지 않고는 절대 택시를 안 탄다. 택시가 물론 편하기는 하지만 돈을 아끼기 위해서다. 근데 지나가다 보면 택시 승객 상당수는 젊은 여자들이더라구. 이삼십대 젊은 년들이 택시가 편하니까 택시를 타는거지. 꼭 앞좌석에는 안 앉고 뒷자석만 앉더라. 택시기사가 성추행할까봐. 병신들이 미니스커트 입고 택시기사 옆에 앞좌석에 앉으면 택시기사가 다리 허벅지 볼까봐 불편하니까 꼭 뒷자석만 앉지. 그리고 하이힐 신었으니까 버스나 전철은 타러가려면 계단 많고 불편하니까 택시를 타지. 치마 입지 말고 하이힐 신지 말고 청바지에 운동화를 신어라 쓰레기 이삼십대 미혼 개 같은 년들아.
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