Mukugadzira nzira yePP jira risiri rakarukwa, zvinhu zvakasiyana-siyana zvinogona kukanganisa maitiro emuviri wechigadzirwa. Kuongorora hukama pakati pezvinhu izvi uye kuita kwechigadzirwa kunobatsira kunyatso kudzora mamiriro ekugadzirisa uye kuwana yakakwirira-mhando uye inoshanda zvakanyanya PP isiri-yakarukwa machira ezvigadzirwa. Pazasi, Chengxin's isiri-yakarukwa jira mupepeti anoongorora muchidimbu izvo zvikuru zvinopesvedzera zvinhu pane zvemuviri zvePP machira asiri akarukwa, uye agogovana nemunhu wese:
1. Melt index uye molecular weight distribution yePP isiri-yakarukwa jira polypropylene chips
Iwo makuru emhando zviratidzo zvepolypropylene machipisi uremu hwemamorekuru, kugovera huremu hwemamorekuru, kugara, kunyungudika index, uye madota. PP machipisi anoshandiswa kutenderera ane huremu hwemamorekuru pakati pe100000 ne250000, asi kudzidzira kwakaratidza kuti rheological zvimiro zvekunyunguduka zviri nani kana molecular huremu hwepolypropylene huchitenderedza 120000, uye yakanyanya kutenderwa kutenderera kumhanya kwakakwira zvakare. Iyo melt index ndiyo parameter inoratidza rheological properties yekunyunguduka, uye melt index ye polypropylene chips inoshandiswa.spunbondkazhinji iri pakati pe10 ne50. Munguva yekutenderera, iyo filament inogamuchira imwe chete yemhepo inoyerera, uye dhizaini reshiyo yefilament inogumira neiyo rheological properties yekunyunguduka.
Iyo yakakura iyo molecular uremu, kureva idiki iyo melt index, inova murombo ayo rheological properties. Iyo diki iyo dhizaini reshiyo inowanikwa nefilament, iyo yakakura saizi yefiber yefilament inowanikwa pasi peiyo imwechete yekunyungudika yakabviswa kubva ku spinneret, zvichikonzera ruoko rwakaoma kunzwa kwePP isiri-yakarukwa jira. Kana iyo yakanyunguduka index yakakwirira, viscosity yekunyunguduka inoderera, iyo rheological properties yakanaka, uye kushorwa kwekutambanudza kunoderera. Pasi pemamiriro akafanana ekutambanudza, kuwanda kwekutambanudza kunowedzera. Sezvo kutariswa kwema macromolecules kunowedzera, simba rekupwanya rePP risiri rakarukwa jira rinowedzera, uye saizi yefilament yefilament ichadzikira, zvichikonzera kupfava kwejira. Pasi pemaitiro akafanana, iyo yakakwira iyo melt index yepolypropylene, iyo idiki saizi yayo yefiber, uye yakakura kusimba kwayo kwekutsemuka.
Kugoverwa kwehuremu hwemamorekuru kunowanzoyerwa nereshiyo (Mw/Mn) yehuremu hweavhareji yemamorekuru huremu (Mw) kusvika kunhamba avhareji yehuremu hwemamorekuru (Mn) yepolymer, inozivikanwa sehuremu hwekugovera huremu. Iyo idiki iyo molecular uremu hwekugovera kukosha, iyo yakanyanya kugadzikana iyo rheological zvimiro zvekunyunguduka kwayo, uye yakanyanya kugadzikana iyo kutenderera maitiro, ayo anobatsira kuvandudza kutenderera kumhanya. Iyo zvakare ine yakaderera kunyunguduka elasticity uye tensile viscosity, iyo inogona kuderedza kutenderera kushushikana, kuita kuti PP ive nyore kutambanudza uye kutsetseka, uye kuwana yakatsetseka denier fiber. Uyezve, kufanana kwekuumbwa kwewebhu kwakanaka, nemaoko akanaka kunzwa uye kufanana.
2. PP isiri-yakarukwa jira rinotenderera tembiricha
Kumisikidzwa kwekutenderera tembiricha kunoenderana nemelt index yezvakagadzirwa uye zvinodikanwa zvezvinhu zvemuviri zvechigadzirwa. Iyo yakakwira iyo melt index yezvakagadzirwa, iyo inokwirisa inotenderera inotenderera tembiricha, uye zvinopesana. Iyo yekutenderera tembiricha yakanangana neiyo viscosity yekunyungudika, uye tembiricha yakaderera. Iyo viscosity yekunyunguduka yakakwira, zvichiita kuti kutenderera kuome uye kunowanzo gadzira yakatyoka, yakaoma kana yakaoma fiber, iyo inokanganisa kunaka kwechigadzirwa. Nokudaro, kuitira kuderedza viscosity yekunyunguduka uye kuvandudza rheological properties, nzira yekusimudza tembiricha inowanzogamuchirwa. Iyo tembiricha yekutenderera ine mhedzisiro yakakosha pane chimiro uye zvimiro zvefiber. Iyo yakadzika tembiricha yekutenderera, iyo inokwirisa iyo tensile viscosity yekunyunguduka, iyo yakakura kusimba kuramba, uye zvakanyanya kuoma kutambanudza filament kuti uwane yakafanana fiber size.
Nguva yekutumira: Mar-16-2024