Polyethylene low-density (LDPE) wani thermoplastic ne da aka yi daga monomer ethylene.Ya kasance matakin farko na polyethylene, wanda aka samar a cikin 1933 ta Imperial Chemical Industries (ICI) ta amfani da babban matsi ta hanyar polymerization na radical.Ƙirƙirar sa yana aiki iri ɗaya a yau.EPA ta kiyasta 5.7% na LDPE (lambar sake yin amfani da su 4) ana sake yin fa'ida.Duk da gasa daga ƙarin polymers na zamani, LDPE ya ci gaba da zama muhimmin darajar filastik.
PTFEwani abu ne mai ƙarfi na fluorocarbon, domin yana da maɗauri mai nauyi mai nauyi wanda ya ƙunshi gabaɗaya na carbon da fluorine.PTFE ne hydrophobic: ba ruwa ko ruwa-dauke abubuwa rigar PTFE, kamar yadda fluorocarbons nuna rage London watsawa sojojin saboda high electronegativity na fluorine.PTFE yana da ɗaya daga cikin mafi ƙasƙanci ƙididdiga na gogayya na kowane m.
Kwatanta LDPE da Polymer PTFE/FEP Ƙimar Dukiya
Aikace-aikace na kayan aiki
Ƙarƙashin polyethylene (LDPE):
Ana amfani da LDPE sosai don kera kwantena daban-daban, rarraba kwalabe, kwalabe na wanka, tubing, jakunkuna na filastik don abubuwan kwamfuta, da kayan aikin dakin gwaje-gwaje daban-daban.Mafi yawan amfani da shi shine a cikin jakar filastik.Sauran kayayyakin da aka yi daga gare ta sun haɗa da:
- * Trays da kwantena na gama gari
- * Filayen aiki masu jurewa lalata
- * Sassan da ke buƙatar zama masu walda da injina
- * Sassan da ke buƙatar sassauƙa, waɗanda suke hidima sosai
- * Sassa masu taushi da jujjuyawa kamar su murfi masu karye
- * zoben fakiti shida
- * Ana yin ruwan 'ya'yan itace da akwatunan madara da allon marufi na ruwa, laminate na takarda da LDPE (a matsayin mai hana ruwa na ciki da na waje), kuma galibi tare da Layer na foil na aluminum (ta haka ya zama marufi aseptic).
- * Marufi don kayan aikin kwamfuta, kamar faifan diski, katunan allo, da fayafai na gani
- * Zane-zanen filin wasa
- * Filayen filastik
POLYMER PTFE/FEP:Maganganun cabling; Ƙunƙarar da ba mai mai ba; O-rings; Seals; Capacitors; Semiconductor masana'antu; Sassan wutar lantarki mai girma; Gasket, Abubuwan Valve.
Abubuwan Kayayyaki:
Ƙarƙashin polyethylene (LDPE):a;An bayyana LDPE da kewayon yawa na 0.910-0.940 g/cm3.Ba ya amsawa a yanayin zafi, sai ta hanyar magunguna masu ƙarfi, kuma wasu kaushi suna haifar da kumburi.Yana iya jure yanayin zafi na 80 ° C ci gaba da 95 ° C na ɗan gajeren lokaci.An yi shi a cikin bambance-bambancen da ba a iya gani ba ko mara kyau, yana da sauƙin sassauƙa da tauri.
b;LDPE yana da ƙarin reshe (a kan kusan 2% na carbon atom) fiye da HDPE, don haka ƙarfinsa na intermolecular (instantaneous-dipole induced-dipole jan hankali) ya fi rauni, ƙarfin ƙarfinsa ya yi ƙasa, kuma ƙarfinsa ya fi girma.Har ila yau, saboda kwayoyin halittarsa ba su da yawa kuma ba su da ƙasa da crystalline saboda rassan gefen, yawansa ya ragu.
c;Juriya na Chemical: 1, Kyakkyawan juriya (babu hari / babu halayen sinadarai) don tsarma da tattara acid, alcohols, tushe da esters; Iyakance juriya (matsakaicin kai hari / babban halayen sinadarai, wanda ya dace da amfani na ɗan lokaci kawai) zuwa aliphatic da hydrocarbons na aromatic, mai ma'adinai, da ma'aikatan oxidizing; 4, Rashin juriya, kuma ba a ba da shawarar amfani da halogenated hydrocarbons.
POLYMER PTFE/FEP:Kyawawan kaddarorin dielectric; Rashin ƙarfi ga mafi yawan sinadarai; Babban zafi da juriya na sinadarai; ƙwaƙƙwaran ƙarancin ƙarfi na gogayya; Kyakkyawan juriya na radiation; ƙarancin ɗanɗano na sifili; Ingantacciyar rashin jin daɗi ga mitar wutar lantarki;Machinability.
Lokacin aikawa: Nuwamba-10-2019