Low Density Polyethylene
Low Density Polyethylene,
Low Density Polyethylene,
Low-density polyethylene (LDPE) is a synthetic resin inoshandisa high pressure process kuburikidza nemahara radical polymerization ye ethylene uye nekudaro inonziwo "high-pressure polyethylene".Sezvo cheni yayo yemamorekuru ine matavi mazhinji marefu uye mapfupi, LDPE haina crystalline pane yakakwirira-density polyethylene (HDPE) uye density yayo yakaderera.Inoratidzira chiedza, inoshanduka, yakanaka yekudzivirira kutonhora uye kukanganisa kwekudzivirira.LDPE yakagadzikana mumakemikari.Iine kumira kwakanaka kune acids (kunze kweiyo yakasimba oxidizing acids), alkali, munyu, yakanakisa magetsi ekudzivirira zvinhu.Kupinda kwayo kwemhute kwakaderera.LDPE ine yakakwira fluidity uye yakanaka processability.Yakakodzera kushandiswa mumhando dzese dze thermoplastic processing process, senge jekiseni rekugadzira, extrusion molding, blow molding, rotomolding, coating, foaming, thermoforming, hot-jet welding uye thermal welding.
Application
LDPE inonyanya kushandiswa kugadzira mafirimu.Inoshandiswa zvakanyanya mukugadzira firimu rekurima (mulching firimu uye yakadururwa firimu), yekurongedza firimu (yekushandisa mukutakura zvihwitsi, miriwo uye chikafu chakaomeswa), firimu rinopeperetswa rekurongedza mvura (yekushandisa mukurongedza mukaka, soy muto, muto, bhinzi nemukaka wesoya), mabhegi ekurongedza anorema, shrinkage yekurongedza firimu, elastic firimu, lining firimu, firimu rekuvaka, general-chinangwa maindasitiri ekurongedza firimu uye mabhegi ezvekudya.LDPE inoshandiswawo zvakanyanya mukugadzira waya & tambo yekumisa sheath.Muchinjikwa-yakabatana LDPE ndicho chinhu chikuru chinoshandiswa mune yekuvharisa layer yeakakwira-voltage tambo.LDPE inoshandiswawo mukugadzira zvigadzirwa zvakaumbwa nejekiseni (zvakadai semaruva ekugadzira, zviridzwa zvekurapa, mushonga uye zvinhu zvekurongedza zvekudya) uye machubhu akaumbwa, mahwendefa, waya & tambo dzekupotera uye zvigadzirwa zvepurasitiki zvakadhindwa.LDPE inoshandiswawo kugadzira zvigadzirwa zvakaputirwa nemhepo zvakaita semidziyo yekubata chikafu, mushonga, zvekuzora uye zvigadzirwa zvemakemikari, uye matangi.
Package, Kuchengeta uye Kutakura
LDPE chidimbu cheLow Density Polyethylene.Polyethylene inogadzirwa ne polymerization ye ethylene.(Poly zvinoreva 'zvakawanda'; kutaura zvazviri, zvinoreva yakawanda ethylene).Ethylene inowanikwa nekutsemura chiedza chepetroleum chinobuda senge naphtha.
Iyo yakaderera density inowanikwa neiyo yepamusoro-kumanikidza polymerization maitiro.Izvi zvinogadzira mamorekuru ane matavi mazhinji eparutivi.Matavi eparutivi anovimbisa kuti dhigirii recrystallization rinoramba rakaderera.Mune mamwe mazwi, nekuda kwechimiro chavo chisina kujairika, mamorekuru haagone kurara mukati kana pamusoro peumwe neumwe nenzira yakarongeka, kuitira kuti mashoma awo akwane mune imwe nzvimbo.Iyo yakaderera dhigirii yekristallisation, iyo yakaderera density yechinhu.
Muenzaniso wakanaka weizvi muhupenyu hwezuva nezuva imvura nechando.Aizi imvura iri mu (yakakwirira) yakanyatsojeka, uye naizvozvo yakareruka kupfuura mvura (chando chakanyungudutswa).
LDPE imhando ye thermoplastic.Ipurasitiki inopfava kana ichipisa, kusiyana nerabha semuenzaniso.Izvi zvinoita kuti thermoplastics ikwane kushandiswazve.Mushure mekupisa, inogona kuunzwa mune mamwe maumbirwo anodiwa.
