Ndi mitundu yanji yamatumba oluka

Polyethylene (PE) amapangidwa makamaka m'mayiko akunja, ndiPolypropylene(PP) amapangidwa makamaka ku China.Ndi mtundu wa utomoni wa thermoplastic wopangidwa ndi polymerization wa ethylene.M'makampani, ma copolymers a ethylene okhala ndi pang'ono α - olefins amaphatikizidwanso.Polyethylene ndi wopanda fungo, nontoxic, waxy, ndi kwambiri otsika kutentha kukana (otsika kutentha angafikire - 70 ～ - 100 ℃), wabwino mankhwala bata, kugonjetsedwa ndi ambiri asidi ndi alkali kukokoloka (si kugonjetsedwa ndi oxidizing asidi), insoluble mu zosungunulira ambiri. kutentha kwa firiji, kuyamwa kwamadzi otsika komanso kutsekemera kwamagetsi kwabwino kwambiri;koma polyethylene imakhudzidwa kwambiri ndi kupsinjika kwa chilengedwe (mankhwala ndi mawotchi) Kukana kukalamba kwa kutentha kumakhala koyipa.The zimatha polyethylene zimasiyanasiyana zosiyanasiyana, makamaka kutengera kapangidwe maselo ndi kachulukidwe.Kachulukidwe kosiyanasiyana (0.91-0.96 g / cm3) pazogulitsa zitha kupezeka ndi njira zosiyanasiyana zopangira.

Polyethylene imatha kukonzedwa ndi njira yowumba ya general thermoplastic (onani mapulasitiki apulasitiki).Amagwiritsidwa ntchito kwambiri popanga mafilimu, zotengera, mapaipi, monofilaments, mawaya ndi zingwe, zofunikira za tsiku ndi tsiku, ndi zina zotero. Zingagwiritsidwenso ntchito ngati zipangizo zotetezera ma TV, radar, etc. Ndi chitukuko cha mafakitale a petrochemical, kupanga. wa polyethylene wakula mwachangu, ndipo zomwe zimatuluka zimatengera pafupifupi 1/4 ya pulasitiki yonse.Mu 1983, mphamvu yonse yopanga polyethylene padziko lapansi inali 24.65 MT, ndipo mphamvu ya chomera chomwe chikumangidwa chinali 3.16 Mt.

Polypropylene(PP)

A thermoplastic utomoni wopezedwa polymerization wa propylene.Pali masinthidwe atatu a isotactic substance, chinthu chosasinthika ndi syndiotactic substance.Isotactic chinthu ndiye chigawo chachikulu cha zinthu zamakampani.Polypropyleneimaphatikizansopo ma copolymers a propylene okhala ndi ethylene pang'ono.Nthawi zambiri translucent colorless olimba, fungo osati poizoni.Chifukwa cha kapangidwe kake komanso kukhathamiritsa kwakukulu, malo osungunuka ndi okwera mpaka 167 ℃, ndipo zinthuzo zimatha kutsekedwa ndi nthunzi.Kuchuluka kwake ndi 0.90g/cm3, yomwe ndi pulasitiki yopepuka kwambiri.Kukana kwa dzimbiri, kulimba kwamphamvu 30MPa, mphamvu, kukhazikika komanso kuwonekera ndizabwino kuposa polyethylene.Zoyipa zake ndizovuta kukana kutentha kwapang'onopang'ono komanso kukalamba kosavuta, komwe kumatha kugonjetsedwa ndikusintha ndikuwonjezera antioxidant motsatana.

Mtundu wamatumba olukanthawi zambiri imakhala yoyera kapena imvi yoyera, yopanda poizoni komanso yopanda kukoma, ndipo imakhala yosavulaza thupi la munthu.Ngakhale amapangidwa ndi mapulasitiki amitundu yosiyanasiyana, chitetezo chake cha chilengedwe chimakhala cholimba, ndipo mphamvu yake yobwezeretsanso ndi yayikulu;

Matumba olukas amagwiritsidwa ntchito kwambiri, makamaka kulongedza ndi kulongedza zolemba zosiyanasiyana, ndipo amagwiritsidwa ntchito kwambiri m'makampani;

Pulasitikimatumba olukaamapangidwa ndiPolypropyleneutomoni monga waukulu zopangira, amene extruded ndi anatambasula mu lathyathyathya ulusi, ndiye nsalu ndi kupanga thumba.

Mapulasitiki ophatikizikamatumba olukaamapangidwa ndi pulasitiki nsalu nsalu ndi tepi casting.

Mndandanda wazinthuzi umagwiritsidwa ntchito kulongedza ufa kapena zida zolimba za granular ndi zolemba zosinthika.Pulasitiki yophatikizikamatumba olukaamagawidwa awiri m'thumba limodzi ndi atatu m'thumba limodzi molingana ndi kapangidwe kake.

Malinga ndi njira yosokera, imatha kugawidwa mu thumba la pansi, kusoka m'mphepete mwa thumba, thumba loyikapo ndi thumba la zomatira.

Malinga ndi m'lifupi mwake m'lifupi thumba, akhoza kugawidwa mu 350, 450, 500, 550, 600, 650 ndi 700mm, ndi specifications wapadera adzagwirizana ndi katundu ndi wofuna.