English
Laboratoriya sarf materiallari tajriba davomida iste'mol qilinadigan asboblardir. Ularning ko'p turlari mavjud. Sarf materiallari materiallariga ko'ra, ular uch toifaga bo'linadi: shisha, plastmassa va metall. Ular orasida plastik mukammal ishlashi va qulay qoliplari tufayli tobora ko'proq afzalliklarga ega bo'ldi. Borgan sari kengroq qo'llaniladi. Umumiy materiallar quyidagi toifalarni o'z ichiga oladi:
PP (polipropilen): shaffof, kimyoviy va harorat barqarorligi yaxshiroq, qo'l hissi PEdan kuchliroq va foydalanish mumkin. taxminan 100 daraja, lekin u past haroratda mo'rt bo'lib qoladi, aşınmaya bardoshli emas, qarish oson, korroziyaga chidamli, oddiy kislota, gidroksidi organik erituvchilar unchalik ta'sir qilmaydi.
PE (polietilen): noaniq, kuchli qattiqlik, qarishga qarshi, engil, oqmaydigan, yumshoq tuzilishga ega va aseton, sirka kislotasi, xlorid kislotasi va boshqalar bilan reaksiyaga kirishmaydi, nisbatan barqaror va yuqori haroratlarda yumshatish oson.
PS (polistirol): shaffof , yuqori qattiqlik, shisha o'tish harorati 100 ℃ dan yuqori, ko'pchilik suvli eritmalar uchun barqaror, lekin turli xil organik moddalar tomonidan korroziyaga uchraydi.
PC (polikarbonat): Yuqori quvvatga ega va elastiklik, yuqori zarba kuchi, yaxshi shaffoflik, yuqori qattiqlik va steril bo'lishi mumkin yuqori haroratda zed, lekin u kuchli kislotalar va ishqorlar va alkogol kabi ba'zi organik erituvchilarga chidamli emas.
PETG (polietilen tereftalat): uning mahsulotlari juda shaffof, yaxshi pishiqlik, shakllantirish qalin devorli shaffof mahsulotlar uchun mos, PETG mukammal ega. qayta ishlash va shakllantirish ishlashi, va dizayner ' s niyatlariga ko'ra har qanday shaklda ishlab chiqilishi mumkin. An'anaviy ekstruziya, inyeksion kalıplama, puflash va blister qoliplash usullari.
Yuqoridagilar keng tarqalgan laboratoriya sarf materiallari hisoblanadi. Odamlarning o'zini o'zi himoya qilish ongini yaxshilash bilan, mo'rt shisha sarf materiallari asta-sekin plastik materiallar bilan almashtiriladi va sarf materiallari uchun umumiy materiallarga aylanadi.
The FAI climbed 5.9 percent year-on-year in the first 11 months of 2018, quickening from the 5.7-percent growth in Jan-Oct, the National Bureau of Statistics (NBS) said Friday in an online statement.
The key indicator of investment, dubbed a major growth driver, hit the bottom in August and has since started to rebound steadily.
In the face of emerging economic challenges home and abroad, China has stepped up efforts to stabilize investment, in particular rolling out measures to motivate private investors and channel funds into infrastructure.
Friday's data showed private investment, accounting for more than 60 percent of the total FAI, expanded by a brisk 8.7 percent.
NBS spokesperson Mao Shengyong said funds into weak economic links registered rapid increases as investment in environmental protection and agriculture jumped 42 percent and 12.5 percent respectively, much faster than the average.
In breakdown, investment in high-tech and equipment manufacturing remained vigorous with 16.1-percent and 11.6-percent increases respectively in the first 11 months. Infrastructure investment gained 3.7 percent, staying flat. Investment in property development rose 9.7 percent, also unchanged.