Los ntawm Andy los ntawm Baiyear Hoobkas
Tshaj tawm rau lub Kaum Ib Hlis 2, 2022
Ntawm no yog lub chaw xov xwm ntawm Baiyear txoj kev txhaj tshuaj molding kev lag luam.Tom ntej no, Baiyear yuav faib cov txheej txheem txhaj tshuaj molding rau hauv ob peb nqe lus los qhia txog kev txheeb xyuas cov ntaub ntawv raw ntawm cov txheej txheem txhaj tshuaj molding, vim tias muaj ntau cov ntsiab lus.Tom ntej no yog tsab xov xwm peb.
(5).BS (K khoom)
1. Kev ua tau zoo ntawm BS
BS yog butadiene-styrene copolymer, uas muaj qee yam toughness thiab elasticity, tsawg hardness (softer) thiab zoo pob tshab.Lub ntiajteb txawj nqus ntawm BS yog 1.01f\cm3 (zoo ib yam li dej).Cov khoom siv yooj yim rau xim, muaj fluidity zoo, thiab yooj yim rau cov duab thiab txheej txheem.
2.Cov yam ntxwv ntawm BS
Kev ua haujlwm kub ntawm BS feem ntau yog 190-225 ° C, thiab pwm kub yog 30-50 ° C.Cov khoom yuav tsum tau qhuav ua ntej ua, vim nws cov fluidity zoo dua, qhov kev txhaj tshuaj siab thiab kev txhaj tshuaj nrawm tuaj yeem qis dua.
(6).PMMA (Acrylic)
1. Kev ua haujlwm ntawm PMMA
PMMA yog ib qho amorphous polymer, feem ntau hu ua plexiglass.Cov pob tshab zoo heev, ua haujlwm kub zoo (kub deformation kub ntawm 98 ° C), thiab muaj kev cuam tshuam zoo.Nws cov khoom muaj qhov nruab nrab txhua yam muaj zog, tsis tshua muaj qhov tawv tawv, thiab yooj yim khawb los ntawm cov khoom tawv thiab tawm cov kab, uas zoo ib yam li PS.Nws tsis yooj yim rau nkig thiab tawg, thiab lub ntiajteb txawj nqus yog 1.18g / cm3.
PMMA muaj cov khoom siv kho qhov muag zoo thiab huab cua tsis kam.Kev nkag mus ntawm lub teeb dawb yog siab li 92%.PMMA cov khoom muaj tsawg heev birefringence thiab yog tshwj xeeb tshaj yog haum rau ua video discs.PMMA muaj qhov ntsuas kub hauv chav.Kev ntxhov siab tawg tuaj yeem tshwm sim nrog nce load thiab sijhawm.
2. Cov yam ntxwv ntawm PMMA
Cov txheej txheem kev ua haujlwm ntawm PMMA yog nruj, thiab nws yog rhiab heev rau ya raws thiab kub.Nws yuav tsum tau qhuav tag nrho ua ntej ua haujlwm (kev pom zoo kom qhuav yog 90 ° C, 2 ~ 4 teev).° C) thiab molding nyob rau hauv siab, pwm kub yog 65-80 ° C.
Kev ruaj ntseg ntawm PMMA tsis zoo heev, thiab nws yuav raug degraded los ntawm qhov kub thiab txias los yog lub sij hawm nyob ntev ntawm qhov kub siab dua.Cov ntsia hlau ceev yuav tsum tsis txhob loj dhau (kwv yees li 60%), thiab cov tuab PMMA feem ntau ua rau "voids", uas yuav tsum tau ua tiav los ntawm kev siv lub rooj vag loj, "tsis tshua muaj khoom kub, pwm kub, qeeb ceev" txhaj tshuaj. txoj kev.
3.Kev siv ntau yam: kev lag luam tsheb (cov khoom siv teeb pom kev zoo, cov cuab yeej ntsuas hluav taws xob, thiab lwm yam), kev lag luam tshuaj (cov thawv ntim cov ntshav, thiab lwm yam), cov ntawv thov kev lag luam (video discs, lub teeb diffusers), cov khoom siv (cov khob haus, ntawv sau, thiab lwm yam. ).
(7) PE (polyethylene)
1. Kev ua haujlwm ntawm PE
PE yog cov yas uas muaj ntau tshaj plaws ntawm cov yas.Nws yog tus cwj pwm los ntawm cov khoom muag zoo, tsis muaj tshuaj lom, tus nqi qis, kev ua haujlwm yooj yim, tshuaj lom neeg zoo, tsis yooj yim rau corrode, thiab nyuaj rau luam tawm.PE yog ib yam crystalline polymer.
Nws muaj ntau hom, feem ntau siv yog LDPE (tsawg ntom polyethylene) thiab HDPE (siab ntom polyethylene), uas yog translucent plastics uas tsis muaj zog thiab ib qho kev nqus ntawm 0.94g / cm3 (me dua dej);LLDPE resins tsawg heev (Qhov ceev yog qis dua 0.910g / cc, thiab qhov ceev ntawm LLDPE thiab LDPE yog nyob nruab nrab ntawm 0.91-0.925).
LDPE yog softer, (feem ntau hu ua mos roj hmab) HDPE feem ntau hu ua tawv mos roj hmab.Nws yog ib qho nyuaj tshaj li LDPE thiab yog cov khoom siv semi-crystalline.Environmental stress cracking tshwm sim.Cov kev ntxhov siab sab hauv tuaj yeem raug txo los ntawm kev siv cov khoom siv nrog cov yam ntxwv ntws qis, yog li txo qhov tshwm sim tawg.Nws yog ib qho yooj yim rau yaj hauv cov kuab tshuaj hydrocarbon thaum qhov kub siab tshaj 60 ° C, tab sis nws tsis kam rau kev sib cais yog zoo dua li ntawm LDPE.
Lub siab crystallinity ntawm HDPE ua rau nws qhov siab ceev, tensile lub zog, siab kub distortion kub, viscosity thiab tshuaj stability.Kev nkag mus tau zoo dua li LDPE.PE-HD muaj qhov cuam tshuam qis zog.Cov cuab yeej yog tswj los ntawm qhov ntom ntom thiab molecular hnyav faib.
HDPE haum rau kev txhaj tshuaj molding muaj qhov nqaim molecular hnyav faib.Rau qhov ceev ntawm 0.91 ~ 0.925g / cm3, peb hu nws thawj hom PE-HD;rau qhov ceev ntawm 0.926 ~ 0.94g / cm3, nws yog hu ua ob hom HDPE;rau qhov ceev ntawm 0.94 ~ 0.965g / cm3, nws yog hu ua thib ob hom HDPE Nws yog peb hom HDPE.
Cov yam ntxwv ntws ntawm cov khoom siv no zoo heev, nrog rau MFR ntawm 0.1 thiab 28. Qhov siab dua qhov hnyav molecular, qhov tsis zoo ntawm cov yam ntxwv ntawm LDPE, tab sis qhov zoo dua qhov cuam tshuam lub zog.HDPE yog qhov yooj yim rau kev ntxhov siab ib puag ncig.Kev tawg tuaj yeem txo tau los ntawm kev siv cov khoom siv nrog cov khoom ntws tsawg heev kom txo tau cov kev ntxhov siab sab hauv.HDPE yaj yooj yim hauv cov kuab tshuaj hydrocarbon thaum qhov kub siab tshaj 60C, tab sis nws qhov kev tiv thaiv rau kev tawg yog zoo dua li ntawm LDPE.
LDPE yog cov khoom siv semi-crystalline nrog lub siab shrinkage tom qab molding, ntawm 1.5% thiab 4%.
LLDPE (Linear Low Density Polyethylene) muaj zog dua tensile, nkag mus, cuam tshuam thiab tsim kua muag ua haujlwm uas ua rau LLDPE haum rau cov yeeb yaj kiab.Nws zoo heev tiv thaiv rau ib puag ncig kev ntxhov siab tawg, tsis tshua muaj kev kub ntxhov thiab kev ua tsov rog ua rau LLDPE txaus nyiam rau cov yeeb nkab, ntawv extrusion thiab txhua daim ntawv thov molding.Daim ntawv thov tshiab kawg ntawm LLDPE yog ua cov mulch rau landfills thiab hauv ob sab phlu rau cov pas dej khib nyiab.
2. Txheej txheem yam ntxwv ntawm PE
Qhov tseem ceeb tshaj plaws ntawm PE qhov chaw yog qhov molding shrinkage tus nqi yog loj, uas yog nquag mus shrinkage thiab deformation.Cov khoom siv PE muaj qhov nqus dej tsawg, yog li nws tsis tas yuav qhuav.PE muaj qhov kub thiab txias ntau yam thiab tsis yooj yim rau decompose (decomposition kub yog 320 ° C).Yog tias lub siab loj, qhov ntom ntawm qhov yuav siab thiab qhov shrinkage yuav tsawg.
Lub fluidity ntawm PE yog nruab nrab, kev ua haujlwm yuav tsum tau tswj nruj me ntsis, thiab cov pwm kub yuav tsum tau khaws cia tas li (40-60 ℃).Lub degree ntawm crystallization ntawm PE muaj feem xyuam rau cov txheej txheem molding.Nws muaj qhov kub thiab txias dua thiab qis pwm kub, thiab crystallinity qis dua.Thaum lub sij hawm crystallization txheej txheem, vim lub anisotropy ntawm shrinkage, lub sab hauv kev nyuaj siab yog concentrated, thiab PE qhov chaw yog feem ntau deformation thiab cracking.
Cov khoom yog muab tso rau hauv ib da dej hauv dej kub ntawm 80 ° C, uas tuaj yeem so lub siab mus rau qee yam.Thaum lub sij hawm molding txheej txheem, cov khoom kub thiab pwm kub yuav tsum siab dua, thiab txhaj tshuaj siab yuav tsum tau qis dua nyob rau hauv lub premise ntawm kom ntseeg tau qhov zoo ntawm cov khoom.Qhov txias ntawm pwm yog tshwj xeeb yog yuav tsum tau ceev ceev thiab sib xws, thiab cov khoom yuav kub thaum demoulding.
HDPE ziab: tsis tas yuav ziab yog tias khaws cia kom zoo.Melting kub 220 ~ 260C.Rau cov ntaub ntawv nrog cov molecules loj, qhov pom zoo melting kub yog nyob nruab nrab ntawm 200 thiab 250C.
Pwm kub: 50 ~ 95C.Cov khoom yas nrog cov phab ntsa tuab hauv qab 6 hli yuav tsum siv pwm pwm siab dua, thiab cov khoom yas nrog cov phab ntsa thickness saum 6 hli yuav tsum siv pwm pwm qis dua.Qhov txias txias ntawm cov khoom yas yuav tsum tsis sib xws los txo qhov sib txawv ntawm qhov shrinkage.Rau qhov zoo tshaj plaws machining lub sij hawm, lub cua txias channel txoj kab uas hla yuav tsum tsis pub tsawg tshaj li 8 hli thiab qhov deb ntawm pwm nto yuav tsum nyob rau hauv 1.3d (qhov "d" yog txoj kab uas hla ntawm lub txias channel).
Txhaj siab: 700 ~ 1050bar.Kev txhaj tshuaj ceev: Kev txhaj tshuaj ceev yog pom zoo.Runners thiab rooj vag: Cov khiav txoj kab uas hla yog nyob nruab nrab ntawm 4 thiab 7.5mm, thiab cov khiav ntev yuav tsum luv li sai tau.Ntau hom rooj vag tuaj yeem siv tau, thiab qhov rooj ntev yuav tsum tsis pub tshaj 0.75mm.Tshwj xeeb tshaj yog haum rau kev siv kub khiav pwm.
Cov cuab yeej "soft-on-stretch" ntawm LLDPE yog qhov tsis zoo nyob rau hauv cov txheej txheem cua tshuab, thiab cov cua tshuab npuas ntawm LLDPE tsis ruaj khov li ntawm LDPE.Qhov sib txawv ntawm qhov tuag yuav tsum tau nthuav dav kom tsis txhob muaj kev txo qis vim qhov siab rov qab siab thiab yaj tawg.Qhov dav dav dav dav dav ntawm LDPE thiab LLDPE yog 0.024-0.040 hauv thiab 0.060-0.10 hauv, feem.
3. Hom kev thov ntau yam:
LLDPE tau nkag mus rau feem ntau cov kev lag luam ib txwm siv rau polyethylene, suav nrog zaj duab xis, molding, yeeb nkab, thiab xaim thiab cable.Los tiv thaiv mulch yog lub lag luam LLDPE tsim tshiab.Mulch, ib daim ntawv loj extruded siv los ua pov tseg thiab pov tseg hauv pas dej ua ke los tiv thaiv kev nkag los yog kis kab mob ntawm thaj chaw ib puag ncig.
Piv txwv suav nrog kev tsim cov hnab, cov hnab khib nyiab, ntim elastic, cov hnab ntim khoom lag luam, cov ntaub so ntswg thiab cov hnab yuav khoom, txhua yam uas siv los ntawm cov khoom siv no txhim kho lub zog thiab tawv.Cov yeeb yaj kiab ntshiab, xws li lub hnab khob cij, tau ua tus thawj coj los ntawm LDPE vim nws qhov kub hnyiab zoo dua.
Txawm li cas los xij, kev sib xyaw ntawm LLDPE thiab LDPE yuav txhim kho lub zog.Kev nkag mus tsis kam thiab nruj ntawm LDPE zaj duab xis yam tsis muaj kev cuam tshuam rau zaj duab xis meej.
HDPE daim ntawv thov ntau yam: lub thawv tub yees, cov thawv ntim khoom, cov khoom siv hauv tsev, kev sib khi npog, thiab lwm yam.
Txhawm rau txuas ntxiv, yog tias koj xav paub ntau ntxiv, thov koj xav tiv tauj peb.Baiyear yog lub koom haum loj loj ua ke nrog cov yas pwm tsim, txhaj tshuaj molding thiab cov ntawv hlau ua.Lossis koj tuaj yeem ua tib zoo mloog mus rau lub chaw xov xwm ntawm peb lub vev xaib official: www.baidasy.com , peb tseem yuav hloov kho cov xov xwm kev paub txog kev txhaj tshuaj molding kev lag luam.
Hu rau: Andy Yang
Dab tsi yog app: +86 13968705428
Email: Andy@baidasy.com
Post lub sij hawm: Nov-29-2022
