Mumakore achangopfuura, kushandiswa kweakakosha einjiniya mapurasitiki kwakawedzera zvishoma nezvishoma kubva kumauto apfuura uye minda yezvemuchadenga kuenda kuminda yakawanda yevagari vemo, senge mota, kugadzira midziyo, uye zvinhu zvevatengi zvepamusoro. Pakati pazvo, polyphenylene sulfide (PPS) uye polyetheretherketone (PEEK) marudzi maviri emapurasitiki einjiniya ane kukurumidza kusimudzira uye kureba kwekushandisa.
PEEK yakakwirira kuPPS maererano nesimba, kuoma, uye tembiricha yekushanda. Panyaya yekupikisa tembiricha yepamusoro, tembiricha yePEEK inosvika 50°C yakakwira kupfuura yePPS. Kune rimwe divi, iyo iri pachena mutengo mukana uye zvirinani kugadzirisa kuita kwePPS kunoita kuti ishandiswe zvakanyanya.
PPS ine zvinotevera kuita zvakanaka:
(1) Intrinsic flame retardant
Different from PC and PA, PPS pure resin and its glass fiber/mineral powder filled composites can easily achieve V-0 @ 0.8mm or even thinner thickness V-0 flame retardant without adding any flame retardant level. Although PC and PA have cheaper prices and better mechanical strength (especially impact strength) than PPS, the cost of PC and PA composites with halogen-free flame retardant formulations (V-0@0.8mm level) is higher than that of PPS. It will rise sharply, and in many cases even higher than PPS materials with the same mechanical strength.
(2) Ultra-yakakwirira liquidity
Mundima yekushandisa yevhavha yenotibhuku, mukana uyu uri pachena kupfuura wePC. Huwandu hwekuwedzera hwekuwedzera haungokanganisa zvakanyanya kuyerera kwechinhu uye kukonzera kunetsa kwekugadzirisa, asi zvakare kukonzera matambudziko akadai seayangarara epamusoro fibers, yakakomba warpage, uye hurombo hwemagetsi zvimiro. Kune semi-crystalline PPS, kunyungudika kwayo kwakanyanya kunobvumira iyo girazi fiber kuzadza kuti ipfuure nyore 50%. Panguva imwecheteyo, mukuita kwekushisa kwakanyanya kunyunguduka kusanganiswa uye extrusion, iyo yakaderera viscosity yePPS ichienzaniswa nePC inogona kuita Girazi fibers ipinde yakaderera mwero weshear uye extrusion, zvichikonzera kureba kwekuchengetedza kureba mune yekupedzisira jekiseni rakaumbwa chinyorwa, icho. inowedzera kuwedzera modulus.
(3) Kunyura kwemvura kwakadzika
Iyi mukana ndeye PA. Panyaya ye fluidity, yakazadzwa kwazvo PA nePPS inofananidzwa; uye kune zvemakanika zvivakwa, PA macomposites ane huwandu hwakafanana hwekuzadza anotonyanya kutonga. Mhedzisiro yacho ndeyekuti chiyero chekuremara chePPS zvigadzirwa nekuda kwekutorwa kwemvura deformation yakadzikira pane iyo yezvigadzirwa zvePA pasi pemamiriro akafanana.
(4) Yakasarudzika simbi magadzirirwo uye yakakwirira kumusoro kuoma
Kuburikidza nekusanganiswa kwemhando dzakakosha uye tembiricha yekuumba inonzwisisika, PPS jekiseni rekuumba zvikamu zvinoburitsawo ruzha rwakafanana nekurova simbi pasi pekubata kwemaoko emunhu, uye pamusoro pacho pachange pakatsetseka segirazi, iine simbi inopenya.
PEEK ine zvinotevera zvakatanhamara zvivakwa:
(1) Kunyanya kupisa kupisa.
Inogona kushandiswa kwenguva yakareba pa 250 ° C, tembiricha inogona kusvika 300 ° C nekukasira, uye haitomboora munguva pfupi pa400 ° C.
(2) Yakanakisa michina zvivakwa uye dimensional kugadzikana.
PEEK inogona kuchengetedza yakakwira simba pakupisa kwakanyanya. Simba rekukotama pa200 ° C rinogona kuramba richisvika 24 MPa, uye simba rekukotama uye simba rekumanikidza pa250 ° C rinogona kusvika 12-13 MPa. Inonyanya kukodzera pakugadzira zvigadzirwa zvinopfuurira pakupisa kwepamusoro. kushanda zvikamu. PEEK ine yakanyanya kusimba, yakanaka dimensional kugadzikana uye yakaderera coefficient yemutsara wekuwedzera, iri padyo zvakanyanya nesimbi aluminium. Pamusoro pezvo, PEEK zvakare ine yakanaka creep kuramba, inogona kumira kushushikana kukuru panguva yebasa, uye haizokonzerese kuwedzera kwakakosha nekuda kwekuwedzera kwenguva.
(3) Yakanakisa makemikari kuramba.
PEEK inopesana nemakemikari akawanda zvakanaka, kunyange pakupisa kwepamusoro, nekudzivirira kwekuora kwakafanana nesimbi ye nickel. Mumamiriro ezvinhu akajairwa, chinhu chega chinogona kunyungudutsa PEEK chakaiswa sulfuric acid.
(4) Yakanaka hydrolysis kuramba.
Inopikisa kukuvadzwa kwemakemikari nemvura kana high-pressure water vapour. Pasi pemamiriro ekupisa kwakanyanya uye kudzvanywa kwepamusoro, zvikamu zvePEEK zvinogona kushanda nguva dzose munzvimbo yemvura uye zvichiramba zvichichengetedza zvakanaka zvemichina. Zvakadai sekuramba kunyudzwa mumvura pa 100 ° C kwemazuva 200, simba rinoramba risina kuchinja.
(5) Yakanaka murazvo unodzoreredza kuita.
Inogona kusvika kuUL 94 V-0 chiyero, inodzima yega, uye inoburitsa hutsi hushoma uye magasi ane muchetura pasi pemamiriro emurazvo.
(6) Kuita kwakanaka kwemagetsi.
PEEK inochengetedza zvivakwa zvemagetsi pane yakafara frequency uye tembiricha renji.
(7) Kuramba kwakasimba kwemwaranzi.
PEEK ine yakagadzikana makemikari chimiro, uye zvikamu zvePEEK zvinogona kushanda zvakanaka pasi pemadosi akakwira eiyo ionizing radiation.
(8) Kusimba kwakanaka.
Kuneta kuramba kuchinjisa kushushikana ndiyo yakanakisa pamapurasitiki ese uye inofananidzwa nealloys.
(9) Kupokana kwakanakisa uye kupfeka kuramba.
High kupfeka kuramba uye yakaderera coefficient of friction inochengetwa pa250 ° C.
(10) Zvakanaka kugadzirisa kushanda.
Easy extrusion uye jekiseni kuumba, uye yakakwirira kuumba kunyatsoshanda.
Nguva yekutumira: 01-09-22