Ityhubhu yerabha ye-Thermoplastic isetyenziswa kakhulu kwimveliso yeemoto, izixhobo zonyango, ukuhanjiswa kolwelo lwamashishini, kunye nezixhobo zasekhaya ngenxa yokwaluka kwayo okugqwesileyo, ukumelana neekhemikhali, kunye nokusetyenzwa ngokulula. Nangona kunjalo, iimeko ezahlukeneyo zokusetyenziswa zineemfuno zokusebenza ezahlukeneyo zerubha ityhubhu, kwaye ukhetho lwezinto eziphathekayo luchaphazela ngqo ubomi benkonzo, ukhuseleko kunye nokusebenza. Eli nqaku lihlalutya ngokucwangcisiweyo amacebo okukhetha imathiriyeli yerubha ye-thermoplastic ukusuka kumbono wepropathi yempahla, iimfuno zesicelo, kunye nezenzo zobunjineli.
Ukuthelekiswa kweeMpawu zeMpahla ye-Mainstream Thermoplastic Rubber
Irubha ye-Thermoplastic (TPR/TPE) yiklasi yezixhobo zepolymer ezidibanisa i-elasticity yerabha kunye neenzuzo zokulungisa iiplastiki. Iintlobo eziqhelekileyo ziquka i-styrene-esekelwe (efana ne-SBS, i-SEBS), i-olefin-esekelwe (njenge-TPV), i-polyurethane{3}esekelwe (i-TPU), kunye ne-polyester{4}}esekelwe (TPEE).
1. I-Styrene{1}esekelwe kwi-thermoplastic elastomers (SBS/SEBS)
I-SBS (i-styrene-i-butadiene-i-copolymer yebhloko ye-styrene) ibonakala ngexabiso eliphantsi kunye nokuguquguquka okuhle, iyenza ilungele iindawo eziphantsi{2}}zobushushu (-i-40℃ukuya kwi-100 degree). Nangona kunjalo, ukuxhathisa kwe-oyile kunye nobushushu obuphezulu{7}}bubuthathaka kakhulu, kwaye isetyenziswa kakhulu kwimpahla yabathengi yemihla ngemihla okanye imibhobho kwizinto ezingabalulekanga{10}}. I-SEBS (i-hydrogenated SBS), ngokuguqulwa kwe-hydrogenation, iphucula ukumelana nokuguga kunye nokumelana nokushisa (ukuya kwi-120 degree), kwaye ichasene ne-ozone kunye nemitha ye-ultraviolet, edla ngokusetyenziswa kwizicelo zangaphandle okanye iimeko ezifuna ukuzinza kwexesha elide.
2. Iipololefins zeThermoplastic (TPV)
I-TPV (efana ne-PP / EPDM blends) yinto edibeneyo yerabha ene-vulcanized vulcanized kunye neplastiki, idibanisa i-elasticity yerabha kunye nokuqina kweplastiki. Igcina amandla omatshini kumaqondo aphezulu (i-130℃~ 150 degree) kwaye ineoli ebalaseleyo kunye nokumelana ne-solvent. Usetyenziso oluqhelekileyo lubandakanya imibhobho ye-injini yemoto kunye nokuhanjiswa kolwelo oluphezulu kwishishini{4}}lobushushu.
3. I-Thermoplastic Polyurethane (TPU)
I-TPU iyaziwa ngamandla ayo aphezulu, ukuxhathisa kwe-abrasion, kunye nokumelana ne-oyile, kunye noluhlu olubanzi lobunzima (i-60A ukuya kwi-80D), iyenza ifanelekele -uxinzelelo oluphezulu,-imeko ze-abrasion (ezifana ne-hydraulic hoses okanye i-pneumatic systems). Nangona kunjalo, i-TPU inoxhathiso olubi lwe-hydrolysis kwaye inokonakala ngokusetyenziswa ixesha elide kwiindawo ezifumileyo, ezifuna iingubo ezikhuselayo okanye i-linings.
4. I-Thermoplastic Polyester Elastomer (TPEE)
I-TPEE idibanisa ukuqina kwepolyester kunye nokuguquguquka kwepolyether, ebonisa ukusebenza kakuhle okuguquguqukayo kokudinwa kunye nokumelana neekhemikhali, iyenze ifanelekele{0}}ukugoba rhoqo okanye iimeko zomthwalo oguqukayo (ezifana nemibhobho yerobhothi okanye iityhubhu ezichanekileyo zokudibanisa isixhobo). Uluhlu lokumelana nobushushu ngokuqhelekileyo luqhelekile - 40℃to 150℃, kodwa ixabiso layo eliphezulu linciphisa ukusetyenziswa kwayo kwimimandla ephantsi.
Imiba yobuNjineli ePhambili yoKhetho lweMathiriyeli
1. Imeko-bume yokuSebenza kunye nokuThotyelwa kweMedia
• Temperature Range: If the pipeline needs to be exposed to high temperatures (>I-120℃) ixesha elongeziweyo, i-TPV okanye i-TPEE iyakhethwa; kwindawo zobushushu-eziphantsi (<-30℃), SEBS or specially formulated TPU are recommended.
• IMidiya yeMichiza: Xa udibana namafutha okanye i-fuel, i-TPV kunye ne-TPU ibonisa ukuchasana okungcono kokuvuvukala kune-SEBS; ukuhambisa iasidi eyomeleleyo/ulwelo lwealkali, ifluorinated modified TPE okanye PTFE -ityhubhu edibeneyo edibeneyo kufuneka ikhethwe.
2. IiMfuno zokuSebenza koomatshini
• Ukumelana noxinzelelo kunye namandla okugqabhuka: Iinkqubo zoxinzelelo eziphezulu-ezifana nemigca yehydraulic) zixhomekeke kwi-TPU okanye i-TPV eyomeleziweyo (enefiber yeglasi eyongeziweyo okanye iileya zenayiloni).
• Ukuguquguquka: Ukusetyenziswa okubandakanya ukugoba rhoqo (okufana neekhathetha zonyango), ubulukhuni obuphantsi-i-TPEE okanye i-SEBS kufuneka kukhethwe ukulinganisela ukuguquguquka kunye nokuxhathisa ukukrazula.
3. IiMfuno zoLawulo kunye neSiqinisekiso: Kwicandelo lezonyango, ukuthotyelwa kwe-FDA okanye i-USP yemigangatho yeClass VI iyafuneka, kunye -nococeko oluphezulu lwe-SEBS okanye i-TPU yezonyango{2} iyacetyiswa; i-tubing yoqhagamshelwano lokutya kufuneka ihlangabezane ne-FDA 21 CFR 177.2600 (umzekelo, i-TPR engenamngcipheko wokufuduka); ishishini leemoto ngokuqhelekileyo lifuna imathiriyeli ukuba iqinisekiswe kwimigangatho ye-LV 312 okanye ye-SAE J20.
Iingcebiso eziSebenzayo kunye neendlela ezizayo
Ekukhetheni izinto eziphathekayo, kuyacetyiswa ukuba wenze izigqibo ezifanelekileyo ngokusebenzisa la manyathelo alandelayo:
1. Chaza iiparamitha zesicelo: Uluhlu lwezibonakaliso eziphambili ezifana nobushushu, uxinzelelo, uhlobo lwemidiya, kunye nobomi benkonzo;
2. Uvavanyo lweMathiriyeli kunye nokuqinisekiswa: Ukuqhuba iimvavanyo zokuguga ezikhawulezileyo, iimvavanyo zokuntywiliselwa kweekhemikhali, kunye novavanyo lwepropathi ngoomatshini kwizinto zomviwa;
3. Uhlalutyo lweendleko-zenzuzo: Yenza umlinganiselo weendleko zemathiriyeli zokuqala ngokuchasene-neendleko zokulondolozwa kwexesha elide. Umzekelo, ngexa i-TPU inexabiso eliphezulu leyunithi, ubomi bayo obude buyenza ifaneleke -ixabiso eliphezulu-izicelo ezongeziweyo.
Kwixesha elizayo, ngophuhliso lwe-bio{0}esekelwe kwi-thermoplastic elastomers (efana ne-polylactic acid{1}}esekelwe kwi-TPR) kunye nemathiriyeli ye-nanocomposite, imibhobho yerabha ye-thermoplastic iya kuzuza impumelelo kuzo zombini indalo kunye nokusebenza. Iinjineli kufuneka ziqhubeke nokubeka iliso kwinkqubela phambili kwisayensi yezixhobo ukuze zihlangabezane neemfuno ezingqongqo zamashishini.
Ukukhethwa kwezinto eziphathekayo kwimibhobho yerubha ye-thermoplastic ayikho nje ukulungiswa kwepharamitha enye, kodwa indlela yobunjineli yenkqubo ebanzi edibanisa izinto eziphathekayo, iimeko zokusebenza kunye neemfuno zokuthotyelwa. Ngokuthelekisa ngokwenzululwazi izinto eziyimfuneko, ukuthembeka kunye noqoqosho lweenkqubo zombhobho kunokuphuculwa kakhulu.
