- AS
1. Kev ua tau zoo ntawm AS
AS yog ib hom propylene-styrene copolymer, tseem hu ua SAN, nrog qhov ceev li ntawm 1.07g/cm3. Nws tsis yooj yim tawg vim muaj kev ntxhov siab sab hauv. Nws muaj pob tshab dua, kub dua thiab muaj zog dua li PS, thiab tsis yooj yim qaug zog.
2. Daim ntawv thov ntawm AS
Cov tais, khob, cov khoom siv rooj tog, cov chaw rau lub tub yees, cov pob qhov rooj, cov khoom siv teeb pom kev zoo, cov khoom dai kom zoo nkauj, cov iav ntsuas, cov thawv ntim khoom, cov ntawv sau, cov roj teeb, cov tes tuav txhuam hniav, thiab lwm yam.
3. Cov xwm txheej ua tiav AS
Qhov kub ua tiav ntawm AS feem ntau yog 210 ~ 250 ℃. Cov khoom no yooj yim nqus dej noo thiab yuav tsum tau ziab ntau tshaj ib teev ua ntej ua tiav. Nws cov kua dej tsis zoo dua li PS me ntsis, yog li qhov siab txhaj tshuaj kuj siab dua me ntsis, thiab qhov kub pwm tswj tau zoo dua ntawm 45 ~ 75 ℃.
- ABS
1. Kev ua tau zoo ntawm ABS
ABS yog acrylonitrile-butadiene-styrene terpolymer. Nws yog ib qho amorphous polymer nrog qhov ceev ntawm li 1.05g / cm3. Nws muaj lub zog siab thiab cov khoom zoo ntawm "ntsug, tawv thiab hlau". ABS yog ib qho yas engineering siv dav dav nrog ntau yam thiab siv dav. Nws tseem hu ua "general engineering plastic" (MBS hu ua pob tshab ABS). Nws yooj yim rau kev ua thiab ua, tsis muaj tshuaj lom neeg, thiab cov khoom yooj yim rau electroplated.
2. Daim ntawv thov ntawm ABS
Cov twj tso kua mis impellers, bearings, handles, yeeb nkab, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom ua si, cov thawv saib, cov thawv ntsuas, cov thawv dej, cov thawv txias thiab cov thawv sab hauv tub yees.
3. Cov yam ntxwv ntawm ABS
(1) ABS muaj hygroscopicity siab thiab tsis kub tsis kam. Nws yuav tsum tau qhuav thiab preheated ua ntej molding thiab ua kom tswj tau cov dej noo hauv qab 0.03%.
(2) Qhov viscosity yaj ntawm ABS resin tsis tshua muaj kev cuam tshuam rau qhov kub thiab txias (txawv ntawm lwm cov amorphous resins). Txawm hais tias qhov kub txhaj tshuaj ntawm ABS siab dua li PS me ntsis, nws tsis muaj qhov kub nce siab zoo li PS, thiab tsis tuaj yeem siv cua sov dig muag. Txhawm rau txo nws cov viscosity, koj tuaj yeem nce qhov ceev ntawm lub hau lossis nce qhov siab / ceev ntawm kev txhaj tshuaj kom txhim kho nws cov kua dej. Qhov kub ua tiav dav dav yog 190 ~ 235 ℃.
(3) Lub viscosity yaj ntawm ABS yog nruab nrab, siab dua li ntawm PS, HIPS, thiab AS, thiab nws cov fluidity tsis zoo, yog li xav tau lub siab txhaj tshuaj siab dua.
(4) ABS muaj qhov cuam tshuam zoo nrog qhov nruab nrab mus rau qhov nruab nrab ntawm kev txhaj tshuaj (tshwj tsis yog cov duab nyuaj thiab cov khoom nyias nyias xav tau qhov txhaj tshuaj siab dua), lub nozzle ntawm cov khoom muaj cov cim huab cua.
(5) ABS molding kub yog qhov siab heev, thiab nws cov pwm kub feem ntau raug kho ntawm 45 thiab 80 ° C. Thaum tsim cov khoom loj dua, qhov kub ntawm cov pwm ruaj khov (pem hauv ntej pwm) feem ntau yog li 5 ° C siab dua li ntawm cov pwm txav tau (pem tom qab pwm).
(6) ABS yuav tsum tsis txhob nyob hauv lub thoob kub siab ntev dhau (yuav tsum tsawg dua 30 feeb), txwv tsis pub nws yuav yooj yim lwj thiab tig daj.
- PMMA
1. Kev ua tau zoo ntawm PMMA
PMMA yog ib qho polymer amorphous, feem ntau hu ua plexiglass (sub-acrylic), nrog rau qhov ceev ntawm li 1.18g / cm3. Nws muaj kev pom tseeb zoo heev thiab lub teeb transmittance ntawm 92%. Nws yog ib qho khoom siv optical zoo; nws muaj kev tiv thaiv kub zoo (tiv thaiv kub). Qhov kub deformation yog 98 ° C). Nws cov khoom muaj lub zog nruab nrab thiab qhov nyuaj ntawm qhov chaw qis. Nws yooj yim khawb los ntawm cov khoom tawv thiab tawm cov cim. Piv nrog PS, nws tsis yooj yim rau brittle.
2. Daim ntawv thov ntawm PMMA
Cov iav ntsuas, cov khoom siv kho qhov muag, cov khoom siv hluav taws xob, cov khoom siv kho mob, cov qauv pob tshab, cov khoom dai kom zoo nkauj, cov iav hnub, cov hniav cuav, cov ntawv tshaj tawm, cov vaj huam sib luag moos, lub teeb tsheb tom qab, lub qhov rais iav, thiab lwm yam.
3. Cov yam ntxwv ntawm PMMA
Cov kev cai ua tiav ntawm PMMA yog nruj heev. Nws rhiab heev rau cov dej noo thiab kub. Nws yuav tsum tau qhuav tag ua ntej ua tiav. Nws cov viscosity yaj yog qhov siab, yog li nws yuav tsum tau pwm ntawm qhov kub siab dua (219 ~ 240 ℃) thiab siab. Qhov kub pwm yog ntawm 65 ~ 80 ℃ zoo dua. Lub thermal stability ntawm PMMA tsis zoo heev. Nws yuav raug puas tsuaj los ntawm qhov kub siab lossis nyob ntawm qhov kub siab dua ntev dhau. Lub hau ntswj ceev yuav tsum tsis txhob siab dhau (kwv yees li 60 rpm), vim nws yooj yim tshwm sim hauv cov khoom PMMA tuab dua. Qhov xwm txheej "void" xav tau lub rooj vag loj thiab "qhov kub ntawm cov khoom siv siab, qhov kub pwm siab, qeeb qeeb" cov xwm txheej txhaj tshuaj kom ua tiav.
4. Acrylic (PMMA) yog dab tsi?
Acrylic (PMMA) yog ib hom yas tawv uas pom tseeb thiab tawv uas feem ntau siv hloov iav hauv cov khoom xws li cov qhov rai uas tawg tau, cov paib teeb pom kev zoo, cov qhov rais saum ru tsev thiab cov ntaub thaiv dav hlau. PMMA yog ib hom khoom tseem ceeb ntawm cov acrylic resins. Lub npe tshuaj ntawm acrylic yog polymethyl methacrylate (PMMA), uas yog cov khoom siv hluavtaws uas tau polymerized los ntawm methyl methacrylate.
Polymethylmethacrylate (PMMA) kuj tseem hu ua acrylic, acrylic iav, thiab muaj nyob rau hauv cov npe lag luam thiab cov npe xws li Crylux, Plexiglas, Acrylite, Perclax, Astariglas, Lucite, thiab Perspex, ntawm lwm tus. Polymethylmethacrylate (PMMA) feem ntau siv rau hauv daim ntawv ua lwm txoj hauv kev sib dua lossis tawg rau iav. PMMA kuj tseem siv ua cov khoom siv casting, kua mem, thiab txheej. PMMA yog ib feem ntawm pawg khoom siv yas engineering.
5. Acrylic ua li cas?
Polymethyl methacrylate yog ua los ntawm polymerization vim nws yog ib qho ntawm cov polymers hluavtaws. Ua ntej, methyl methacrylate raug muab tso rau hauv pwm thiab ntxiv cov catalyst kom ua kom cov txheej txheem sai dua. Vim yog cov txheej txheem polymerization no, PMMA tuaj yeem ua rau ntau yam xws li daim ntawv, resins, blocks, thiab hlaws dai. Cov kua nplaum acrylic kuj tseem tuaj yeem pab ua kom cov PMMA mos thiab vuam lawv ua ke.
PMMA yooj yim rau kev tswj hwm ntau txoj hauv kev. Nws tuaj yeem sib txuas nrog lwm cov ntaub ntawv los pab txhim kho nws cov khoom. Nrog thermoforming, nws ua kom yooj ywm thaum cua sov thiab khov thaum txias. Nws tuaj yeem raug qhov loj me kom haum siv lub tshuab txiav lossis laser txiav. Yog tias polished, koj tuaj yeem tshem tawm cov khawb ntawm qhov chaw thiab pab tswj nws qhov kev ncaj ncees.
6. Cov acrylic sib txawv yog dab tsi?
Ob hom yas acrylic tseem ceeb yog cast acrylic thiab extruded acrylic. Cast acrylic kim dua los tsim tab sis muaj zog dua, ruaj khov dua, meej dua, thermoforming ntau yam thiab ruaj khov dua li extruded acrylic. Cast acrylic muaj kev tiv thaiv tshuaj lom neeg zoo heev thiab ruaj khov, thiab yooj yim rau xim thiab duab thaum lub sijhawm tsim khoom. Cast acrylic kuj muaj ntau yam tuab. Extruded acrylic pheej yig dua li cast acrylic thiab muab cov acrylic sib xws dua, ua haujlwm tau zoo dua li cast acrylic (ntawm tus nqi ntawm lub zog txo qis). Extruded acrylic yooj yim rau kev ua thiab tshuab, ua rau nws yog lwm txoj hauv kev zoo rau cov ntawv iav hauv kev siv.
7. Vim li cas acrylic thiaj siv ntau heev?
Feem ntau siv cov acrylic vim nws muaj cov yam ntxwv zoo ib yam li iav, tab sis tsis muaj teeb meem brittleness. Acrylic iav muaj cov khoom siv optical zoo heev thiab muaj tib lub refractive index li iav hauv lub xeev khov. Vim nws cov khoom tsis tawg, cov neeg tsim qauv tuaj yeem siv acrylics hauv qhov chaw uas iav yuav txaus ntshai dhau lossis yuav tsis ua haujlwm (xws li submarine periscopes, aircraft qhov rais, thiab lwm yam). Piv txwv li, daim iav tiv thaiv bulletproof feem ntau yog daim acrylic 1/4-nti-tuab, hu ua solid acrylic. Acrylic kuj ua tau zoo hauv kev txhaj tshuaj molding thiab tuaj yeem tsim rau hauv yuav luag txhua yam duab uas tus neeg ua pwm tuaj yeem tsim. Lub zog ntawm acrylic iav ua ke nrog nws yooj yim ntawm kev ua thiab machining ua rau nws yog cov khoom siv zoo heev, uas piav qhia vim li cas nws thiaj li siv dav hauv kev lag luam neeg siv khoom thiab kev lag luam.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-13-2023
