Polypropylene (PP) ndeye thermoplastic yekuwedzera polymer yakagadzirwa kubva musanganiswa wepropylene monomers.Iyo ine huwandu hwakasiyana hwekushandisa, kusanganisira yevatengi chigadzirwa kurongedza, zvikamu zvepurasitiki zveindasitiri yemotokari, uye machira.Philip Oil Company masayendisiti Paul Hogan naRobert Banks vakatanga kugadzira polypropylene muna 1951, uye gare gare masayendisiti eItaly neGermany Natta naRehn vakagadzirawo polypropylene.Natta akakwana uye akagadzira yekutanga polypropylene chigadzirwa muSpain muna 1954, uye kugona kwayo kwekristaro kwakamutsa kufarira kukuru.Pakazosvika 1957, kufarirwa kwepolypropylene kwakakwira, uye kugadzirwa kwakawanda kwekutengesa kwakatanga muEurope yose.Nhasi, yave imwe yemapurasitiki anonyanya kushandiswa munyika.
Bhokisi remishonga rakagadzirwa nePP rine hinged lid
Maererano nemishumo, ikozvino kudiwa kwepasi rose kwePP zvinhu zvinenge mamiriyoni makumi mana nemashanu pagore, uye inofungidzirwa kuti kudiwa kuchawedzera kusvika pamamiriyoni makumi matanhatu nemaviri pakupera kwe2020. Kushandiswa kukuru kwePP ndiyo indasitiri yekutakura, iyo inosvika makumi matatu muzana ehuwandu hwekushandisa.Yechipiri ndeyekugadzira magetsi nemidziyo, iyo inodya inenge 26%.Midziyo yemumba nemaindasitiri emotokari imwe neimwe inoshandisa 10%.Indasitiri yekuvaka inoshandisa 5%.
PP ine nzvimbo yakatsetseka, inogona kutsiva zvimwe zvigadzirwa zvepurasitiki, senge magiya nemapadhi efenicha akagadzirwa nePOM.Nzvimbo yakatsetseka inoitawo kuti zviome kuti PP inamate kune dzimwe nzvimbo, kureva kuti, PP haigone kusungirirwa zvakasimba neglue yeindasitiri, uye dzimwe nguva inofanirwa kusungirirwa newelding.Kuenzaniswa nemamwe mapurasitiki, PP inewo maitiro ehushoma density, iyo inogona kuderedza uremu kune vashandisi.PP ine yakanakisa kuramba kune organic zvinonyungudutsa segirisi pane tembiricha yekamuri.Asi PP iri nyore kuita oxidize pakupisa kwakanyanya.
Imwe yemabhenefiti makuru ePP ndeyekuita kwayo kwakanakisa kugadzirisa, iyo inogona kuumbwa nekuumbwa kwejekiseni kana CNC kugadzirisa.Semuenzaniso, mubhokisi remushonga rePP, chivharo chakabatana nemuviri webhodhoro nehinge mhenyu.Bhokisi remapiritsi rinogona kugadziriswa zvakananga nekuumbwa kwejekiseni kana CNC.Hinge mhenyu inobatanidza chivharo ipepa repurasitiki rakatetepa kwazvo, rinogona kukotamiswa kakawanda (richifamba munzvimbo yakanyanyisa pedyo ne360 degrees) risina kutyora.Kunyangwe hinge mhenyu yakagadzirwa nePP isingakwanise kutakura mutoro, yakanyatsokodzera chivharo chebhodhoro chezvinodiwa zvezuva nezuva.
Imwe bhenefiti yePP ndeyekuti inogona kuve nyore copolymerized nemamwe mapolymer (senge PE) kugadzira mapurasitiki akaumbwa.Iyo copolymer inoshandura zvakanyanya zvimiro zvezvinhu, uye inogona kuwana yakasimba engineering maapplication kana ichienzaniswa nePP yakachena.
Chimwe chisingayereki application ndechekuti PP inogona kuita senge zvinhu zvepurasitiki uye fiber zvinhu.
Mamiriro ari pamusoro anoreva kuti PP inogona kushandiswa mune akawanda maapplication: mahwendefa, matireyi, makapu, mabhegi emaoko, opaque midziyo yepurasitiki uye akawanda ematoyi.
Iwo akanyanya kukosha maitiro ePP ndeaya anotevera:
Kupokana kwemakemikari: Diluted alkalis uye acids hazvibatike nePP, izvo zvinoita kuti ive mudziyo wakakodzera wezvinwiwa zvakadaro (senge detergents, zvigadzirwa zverubatsiro rwekutanga, nezvimwewo).
Elasticity uye kuoma: PP ine elasticity mukati meimwe nhanho yekutsauka, uye ichaita deformation yepurasitiki isina kupaza muchikamu chekutanga chekuchinja, saka inowanzoonekwa se "yakaoma" zvinhu.Kuomarara izwi reinjiniya rinotsanangurwa sekugona kwechinhu kukanganisa (plastic deformation kwete elastic deformation) isina kutyora.
Kuramba kuneta: PP inochengetedza chimiro chayo mushure mekumonyorora kwakawanda nekukotama.Ichi chimiro chakakosha pakugadzira mahinji ehupenyu.
Insulation: PP zvinhu zvine kupikisa kwakanyanya uye ndeye insulating zvinhu.
Transmittance: Inogona kugadzirwa kuva yakajeka ruvara, asi inowanzoitwa yakasikwa opaque ruvara ine imwe ruvara transmittance.Kana yakakwira transmittance ichidikanwa, acrylic kana PC inofanira kusarudzwa.
PP i thermoplastic ine nzvimbo yekunyunguduka inoita 130 degrees celsius, uye inova mvura mushure mekusvika painonyungudika.Kufanana nemamwe thermoplastics, PP inogona kudziyirwa uye kunyoroveswa kakawanda pasina kuderera kwakanyanya.Naizvozvo, PP inogona kudzokororwa uye kudzoreredzwa nyore.
Kune marudzi maviri makuru: homopolymers uye copolymers.Copolymers akapatsanurwazve kuita block copolymers uye random copolymers.Chikamu chega chega chine maapplication akasiyana.PP inowanzonzi "simbi" zvinhu zveindasitiri yepurasitiki, nekuti inogona kugadzirwa nekuwedzera madhipatimendi kuPP, kana kugadzirwa nenzira yakasarudzika, kuitira kuti PP igone kugadziridzwa uye kugadziridzwa kuti isangane neyakasiyana application zvinodiwa.
PP yekushandiswa kwese maindasitiri ndeye homopolymer.Block copolymer PP inowedzerwa ne ethylene kuti uvandudze kukanganisa kuramba.Random copolymer PP inoshandiswa kugadzira yakawanda ductile uye yakajeka zvigadzirwa
Kufanana nemamwe mapurasitiki, anotanga kubva ku "fractions" (lighter groups) akaumbwa nekunyungudutswa kwemafuta ehydrocarbon uye anosanganiswa nemamwe macatalysts kuti aumbe mapurasitiki kuburikidza nepolymerization kana condensation reactions.
PP 3D kudhinda
PP haigone kushandiswa pakudhinda kwe3D mune filament fomu.
PP CNC kugadzirisa
PP inoshandiswa kuCNC kugadzirisa mune pepa fomu.Kana tichigadzira prototypes yenhamba diki yezvikamu zvePP, isu tinowanzo kuita CNC machining pavari.PP ine tembiricha yakaderera, zvinoreva kuti inokanganiswa nyore nekupisa, saka inoda hunyanzvi hwepamusoro kuti ucheke nemazvo.
PP jekiseni
Kunyangwe PP iine semi-crystalline zvivakwa, iri nyore kuumba nekuda kwekuderera kwayo kunyungudika viscosity uye yakanaka kwazvo fluidity.Iyi ficha inovandudza zvakanyanya kukurumidza uko zvinhu zvinozadza mold.Iyo shrinkage rate yePP inenge 1-2%, asi ichasiyana nekuda kwezvinhu zvakawanda, zvinosanganisira kubata kumanikidza, kubata nguva, kunyunguduka tembiricha, mold wall ukobvu, mold tembiricha, uye mhando uye muzana yezvinowedzera.
Pamusoro pezvakajairwa mapurasitiki ekushandisa, PP yakanyatsokodzerawo kugadzira fiber.Zvigadzirwa zvakadaro zvinosanganisira tambo, makapeti, upholstery, zvipfeko, nezvimwe.
Ndezvipi zvakanakira PP?
PP inowanikwa nyore uye yakachipa.
PP ine yakakwirira flexural simba.
PP ine nzvimbo yakati chechetere.
PP inodzivirira hunyoro uye ine mvura yakaderera yekunyura.
PP ine yakanaka makemikari kuramba mune akasiyana asidhi uye alkalis.
PP ine yakanaka kuneta kuramba.
PP ine simba rakanaka rekuita.
PP yakanaka magetsi insulator.
●PP ine yakakwira coefficient yekuwedzera kwekupisa, iyo inomisa yayo-yepamusoro-tembiricha maapplication.
● PP inokonzerwa nekusvibiswa nemirairo ye ultraviolet.
● PP ine kushomeka kwekudzivirira kune chlorinated solvents uye anonhuwirira hydrocarbons.
● PP inonetsa kupfapfaidza pamusoro pepamusoro nekuda kwekutadza kwayo kunamatira.
● PP inopisa zvikuru.
● PP iri nyore kuita oxidize.
Nguva yekutumira: Jul-27-2023