Kugadzirwa kwekunze kunonyanya kuitwa nepolyethylene (PE), kugadzirwa kwemumba kunonyanya kuitwa nepolypropylene (PP), rudzi rwethermoplastic resin inogadzirwa ne ethylene polymerization. Mumaindasitiri, inosanganisirawo copolymers ye ethylene ine huwandu hushoma hwe -olefin. Polyethylene haina hwema, haina chepfu, inonzwa sewakisi, ine simba rakaderera rekudzivirira kupisa (tembiricha yakaderera inoshandiswa inogona kusvika -70 ~ -100℃), kugadzikana kwakanaka kwemakemikari, inogona kutsungirira acid yakawanda nealkali erosion (hapana oxidation ye acid), tembiricha yemukamuri isinganyungudike mu solvents yakajairika, kunyudzwa kwemvura kudiki, kushanda zvakanaka kwemagetsi; Asi polyethylene inonzwa kushushikana kwezvakatipoteredza (makemikari nemhedzisiro yemakanika) uye haina simba rekudzivirira kupisa kukwegura. Hunhu hwe polyethylene hunosiyana kubva kumarudzi kusvika kumarudzi, kunyanya zvichienderana nechimiro chemamorekuru uye density. Zvigadzirwa zvine density yakasiyana (0.91 ~ 0.96g/cm3) zvinogona kuwanikwa nekushandisa nzira dzakasiyana dzekugadzira. Polyethylene inogona kugadziriswa nenzira ye general thermoplastic molding (ona plastic processing). Inoshandiswa zvakanyanya mukugadzira firimu, mudziyo, pombi, waya imwe chete, waya netambo, zvinodiwa zuva nezuva, nezvimwewo, uye inogona kushandiswa sezvinhu zvinodzivirira kupisa zveTV, radar, nezvimwewo. Nekukura kweindasitiri yemafuta, kugadzirwa kwepolyethylene kwakakurumidza kukura, kubuda kweinenge chikamu chimwe muzvina chepurasitiki yese yakagadzirwa. Muna 1983, huwandu hwese hwekugadzira hwepolyethylene hwaive 24.65Mt, uye huwandu hwefekitari iri kuvakwa hwaive 3.16Mt.
Polypropylene (PP)
Resin yethermoplastic inogadzirwa nepolymerization yepropylene. Kune marongerwo matatu ezvigadzirwa zve isochronous, zvisina kurongeka uye zvinopindirana, uye zvigadzirwa zve isochronous ndizvo zvinhu zvikuru zvezvigadzirwa zvemaindasitiri. Polypropylene inosanganisirawo copolymers yepropylene uye ethylene shoma. Kazhinji inopenya isina ruvara yakasimba, isina hwema isina chepfu. Nekuti chimiro chayo chakachena uye chakagadzirwa nemakristaro zvakanyanya, saka nzvimbo yekunyunguduka inosvika 167℃, kudzivirira kupisa, zvigadzirwa zvinogona kushandiswa kuuraya utachiona hwemhepo ndiyo mabhenefiti ayo anoshamisa. Nehuwandu hwe0.90g/cm3, ndiyo purasitiki yakareruka kupfuura dzose. Kudzivirira ngura, simba rekudhonza 30MPa, simba, kuomarara uye kujeka zviri nani pane polyethylene. Dambudziko nderekudzivirira kupisa kwakaderera uye kukwegura kuri nyore, izvo zvinogona kukundwa nekuchinja uye kuwedzera antioxidant zvakateerana.
Ruvara rwebhegi rakarukwa runowanzova ruchena kana kuti grey chena, harina chepfu uye harina kunaka, kazhinji harikuvadzi muviri wemunhu zvakanyanya, kunyangwe richigadzirwa nemapurasitiki akasiyana-siyana emakemikari, asi dziviriro yaro yezvakatipoteredza yakasimba, uye simba rekudzokorodza rakawanda;
Mabhegi akarukwa anoshandiswa zvakanyanya, anonyanya kushandiswa pakurongedza nekurongedza zvinhu zvakasiyana-siyana, anoshandiswa zvakanyanya mumaindasitiri;
Bhegi rakarukwa repurasitiki rinogadzirwa ne polypropylene resin sechinhu chikuru, chinoburitswa chobva chatambanudzwa kuita siriki yakatsetseka, chobva charukwa uye chogadzirwa mabhegi.
Bhegi rakarukwa repurasitiki rakagadzirwa neshinda yakagadzirwa nepurasitiki, iyo inogadzirwa nenzira yekumonera.
Zvigadzirwa izvi zvinoshandiswa pakurongedza hupfu kana zvinhu zvakasimba zvakasanganiswa uye zvinhu zvinochinjika. Bhegi rakarukwa repurasitiki rakakamurwa kuita bhegi mbiri dziri mu-rimwe uye bhegi nhatu dziri mu-rimwe zvichienderana nehukuru hwezvinhu zvacho.
Zvichienderana nenzira yekusona, inogona kukamurwa kuita bhegi repasi rekusona, bhegi repasi rekusona, pocket yekuisa uye bhegi rekusona rekubatanidza.
Zvichienderana nehupamhi hunoshanda hwebhegi, rinogona kukamurwa kuita 350, 450, 500, 550, 600, 650 uye 700mm. Magadzirirwo akakosha anofanira kubvumidzwa nemativi ese.
Nguva yekutumira: Gunyana-28-2020