Ukuthandwa kwezikhwama ezilukiwe

Amakhasimende amaningi ngokusebenzisa iwebhusayithi yethu ukuze athole izeluleko zocingo ngokuthandwa kwezinhlobo zezikhwama ezilukiweyo, namuhla i-DongLai ilukiwe isikhwama i-Xiaobian ukuchaza ukuthandwa kwezinhlobo zezikhwama ezilukiweyo.

Izinhlobo zezikhwama ezilukiwe

Izikhwama ezilukiwe zibuye zibizwe ngezikhwama ze-snakeskin. Iwuhlobo lwepulasitiki, olusetshenziselwa kakhulu ukupakisha. Impahla eluhlaza ngokuvamile i-polyethylene, i-polypropylene nezinye izinto zokusetshenziswa zamakhemikhali epulasitiki. Nasi isingeniso esifushane sohlobo lwesikhwama esilukiwe kanye nokusetshenziswa.

I-Polyethylene iyimpahla eyinhloko yokukhiqizwa kwamanye amazwe, i-polypropylene ingumkhiqizo oyinhloko wasekhaya. Kuyi-resin ye-thermoplastic eyenziwe nge-polymerization ye-ethylene. Embonini, kuhlanganisa nama-copolymers e-ethylene anenani elincane le-α-olefin. I-polyethylene ayinaphunga, ayinabuthi, inobuthi, inokumelana okuhle kakhulu nokushisa okuphansi (izinga lokushisa elincane lokusebenza lifika ku--70 ~ -100 ℃), ukusimama okuhle kwamakhemikhali, ukumelana nokugqwala kwe-asidi ne-alkali (ukumelana ne-asidi, i-oxidation), ayincibiliki ezincibilikilweni ezijwayelekile ekamelweni lokushisa, ukumuncwa kwamanzi aphansi, ukusebenza kahle kokufakwa kukagesi; Kodwa-ke, i-polyethylene izwela kakhulu ekucindezelweni kwemvelo (imiphumela yamakhemikhali kanye nemishini) futhi inokumelana okuphansi nokushisa ukuguga. Izakhiwo ze-polyethylene ziyahlukahluka kusuka ezinhlobonhlobo kuya ezihlukahlukene, ikakhulukazi kuye ngokuthi isakhiwo samangqamuzana nobuningi. Izindlela ezihlukene zokukhiqiza zingaveza ukuminyana okuhlukile (0.91-0.96g/cm3). I-Polyethylene ingacutshungulwa ngendlela efanayo nokubunjwa kwepulasitiki ye-thermoplastic evamile (bheka ukucubungula kwePlastiki). Isetshenziswa kabanzi ekukhiqizeni ifilimu, iziqukathi, amapayipi, intambo eyodwa, intambo kanye nekhebula, izidingo zansuku zonke, njll. Ingasetshenziswa njengempahla yokufaka imvamisa ephezulu ye-TV, i-radar, njll. Ngokuthuthuka kwemboni ye-petrochemical, ukukhiqizwa kwe-polyethylene kuye kwathuthuka ngokushesha, kubalwa cishe 1/4 wengqikithi yokukhiqizwa kwepulasitiki. Ngo-1983, umthamo womhlaba wokukhiqiza we-polyethylene wawungamathani angama-24.65 metric, futhi imboni esakhiwa yayinamandla angama-3.16 metric tons.

I-Polypropylene (PP)

I-resin ye-thermoplastic eyenziwe nge-polymerization ye-propylene. Kunezinhlobo ezintathu zokucushwa, okungukuthi, isotopic ngokugcwele, i-atactic kanye nengaqondile. Imikhiqizo yezimboni ikakhulukazi yakhiwe izakhiwo ze-isotopic. I-Polypropylene ihlanganisa ne-copolymer ye-propylene kanye nenani elincane le-ethylene. Ngokuvamile iqinile, ingenambala, ayinaphunga futhi ayinabuthi. Ngenxa yemithetho yesakhiwo, i-crystallinity ephezulu, iphuzu elincibilikayo lifika ku-167 ℃, ukumelana nokushisa. Ngobukhulu obungu-0.90g/cm3, iyipulasitiki elula kakhulu eguquguqukayo. Ukumelana nokugqwala, amandla aqinile angu-30MPa, amandla, ukuqina nokungafihli lutho kungcono kune-polyethylene. Ububi bokuthi izinga lokushisa eliphansi ukumelana nomthelela limpofu, kulula ukuguga, kodwa lingashintshwa futhi lengezwe i-antioxidant ukuze linqobe.

Umbala wesikhwama esilukiwe umhlophe noma awumhlophe ngokujwayelekile, awunabo ubuthi futhi awunambitheki, ukulimala emzimbeni womuntu ngokuvamile kuncane. Nakuba zenziwe ngezinhlobonhlobo zamapulasitiki amakhemikhali, kodwa ukuvikelwa kwemvelo okuqinile, amandla okuvuselela kabusha;

Isikhwama esilukiweyo sisetshenziswa kakhulu, ikakhulukazi sisetshenziselwa ukupakisha izimpahla ezahlukahlukene, futhi sisetshenziswa kabanzi embonini;

Isikhwama esilukiwe sepulastiki esine-polypropylene resin njengeyona nto eyinhloko eluhlaza, i-extrusion futhi yeluleke ibe intambo eyisicaba, bese ilukwa esikhwameni.

Isikhwama esilukiwe sepulasitiki esiyinhlanganisela esinendwangu elukiwe yepulasitiki njengento eyisisekelo, ngokubunjwa kokugeleza.

Isetshenziselwa ukupakisha impushana noma izinto eziqinile eziyimbudumbudu nama-athikili aguqukayo. Isikhwama esilukiwe sepulasitiki esiyinhlanganisela sihlukaniswe kabili esikhwameni esisodwa futhi ezintathu esikhwameni esisodwa ngokusho kokwakheka okuyinhloko.

Ngokwendlela yokuthunga, ingahlukaniswa isikhwama esingaphansi sokuthunga, isikhwama sokuthunga esiseceleni esingaphansi, isikhwama sokufaka kanye nesikhwama sokuthunga esifakwe ngeglue.

Ngokuya ngobubanzi obusebenzayo besikhwama, singahlukaniswa sibe ngu-450, 500, 550, 600, 650 no-700 mm. Ukucaciswa okukhethekile kuzovunyelwa yizinhlangothi zombili.

Ngenhla ukuthandwa kokwakheka okuncane kuzo zonke izinhlobo zokuqedwa kokubonisana okuhlobene nesikhwama esilukiweyo, ngokwabelana kokuqukethwe, ekwandiseni izinhlobo zezikhwama ezilukiweyo zinengqondo ethile, uma ufuna ukujula esikhwameni solwazi lwemakethe, ungathintana nomthengisi enkampanini yethu, noma empumalanga nesikhwama esilukiweyo endaweni yophenyo, lokhu kuxhumana kwephepha kuxoxwa ngakho.