SEBS(Styrene Ethylene Butylene Styrene)
STYRENE-ETHYLENE-BUTYLENE-STYRENE THERMOPLASTIC ELASTOMER (SEBS)
Awọn ohun-ini ati awọn ohun elo
Styrene-ethylene-butylene-styrene, ti a tun mọ ni SEBS, jẹ elastomer thermoplastic pataki (TPE) eyiti o ṣe bi roba laisi gbigba vulcanization.SEBS lagbara ati rọ, ni ooru to dara julọ ati resistance UV ati rọrun lati ṣe ilana.O jẹ iṣelọpọ nipasẹ apakan ati yiyan hydrogenating ti styrene-butadiene-styrene copolymer (SBS) eyiti o mu iduroṣinṣin gbona, oju ojo ati resistance epo, ati mu ki SEBS nya si sterilisable.Sibẹsibẹ, hydrogenation tun dinku iṣẹ ṣiṣe ẹrọ ati mu idiyele ti polima pọ si. .
Awọn elastomers SEBS nigbagbogbo ni idapọ pẹlu awọn polima miiran lati mu iṣẹ wọn pọ si.Wọn ti wa ni lilo bi awọn iyipada ipa fun awọn thermoplastics ti ẹrọ ati bi flexibilizers / tougheners fun ko o polypropylene (PP).Nigbagbogbo epo ati awọn ohun elo ni a ṣafikun si idiyele kekere ati / tabi lati tun awọn ohun-ini ṣe siwaju.Awọn ohun elo pataki pẹlu awọn adhesives ifarabalẹ titẹ gbigbona, awọn ọja isere, awọn atẹlẹsẹ bata, ati awọn ọja bitumen ti a ṣe atunṣe TPE fun titọ opopona ati awọn ohun elo orule.
Styrenics, tabi styrenic block copolymers jẹ lilo pupọ julọ ti gbogbo TPE's.Wọn darapọ daradara pẹlu awọn ohun elo miiran bii awọn kikun ati awọn iyipada.SEBS (styrene-ethylene/butylene-styrene) jẹ ifihan nipasẹ awọn ibugbe lile ati rirọ laarin awọn okun polima kọọkan.Awọn bulọọki ipari jẹ styrene crystalline lakoko ti aarin-blocs jẹ awọn bulọọki ethylene-butylene rirọ.Ni awọn iwọn otutu ti o ga julọ awọn ohun elo wọnyi rọ ati di ito.Nigbati o ba tutu, awọn okun darapọ mọ awọn bulọọki ipari styrene ti o ṣe ọna asopọ agbelebu ti ara ati pese roba bi rirọ.Isọye ati ifọwọsi FDA jẹ ki SEBS jẹ aṣayan ti o dara julọ fun awọn ohun elo ipari-giga.
SEBS le mu ilọsiwaju ṣiṣẹ ni titẹ-kókó ati awọn ohun elo alemora miiran.Diẹ ninu awọn ohun elo ti o wọpọ diẹ sii pẹlu ọpọlọpọ awọn teepu, awọn akole, awọn pilasita, awọn alemora ikole, awọn aṣọ iwosan, edidi, awọn aṣọ ati awọn kikun siṣamisi opopona.
SEBS le ṣe akojọpọ lati gbejade awọn ohun elo eyiti o mu imudara, rilara, irisi ati irọrun ti awọn ohun elo lọpọlọpọ pọ si.Awọn ere idaraya ati igbafẹfẹ, awọn nkan isere, imototo, iṣakojọpọ, ọkọ ayọkẹlẹ, ati apẹrẹ ati awọn ẹru imọ-ẹrọ extruded jẹ apẹẹrẹ ti o wọpọ.
SEBS le ṣee lo ni apapo pẹlu orisirisi fillers.Compounders yoo fi awọn wọnyi fillers ti o ba ti mu epo gbigba, iye owo idinku, dara dada rilara, tabi afikun imuduro wa ni ti beere lori mimọ SEBS.
Boya kikun ti o wọpọ julọ fun SEBS jẹ epo.Awọn epo wọnyi yoo yan da lori awọn ibeere ohun elo kan pato.Ṣafikun epo aromatic n rọ awọn bulọọki PS nipasẹ pilasitik eyiti o dinku lile ati awọn ohun-ini ti ara.Awọn epo jẹ ki awọn ọja jẹ rirọ ati tun ṣe bi awọn iranlọwọ ṣiṣe.Awọn epo paraffin jẹ ayanfẹ nitori pe wọn jẹ ibaramu diẹ sii pẹlu bulọọki aarin EB.Awọn epo aromatic ni a yago fun ni gbogbogbo nitori wọn wọ inu ati ṣe ṣiṣu awọn ibugbe polystyrene.
SEBS le ṣe alekun awọn ohun elo styrene giga, awọn fiimu, awọn baagi, fiimu na ati apoti isọnu.Wọn le mu iṣẹ ṣiṣe ti awọn polyolefins dara si fun lilo ninu awọn iwọn otutu to gaju, mu iwifun pọ si ati resistance ija, ati imudara rirọ.
Awọn ohun-ini akọkọ ti Ipele kọọkan ti Awọn ọja jara SEBS (Iye Aṣoju)
| Ipele | Ilana | Idina Ratio | 300% Nina Agbara MPa | Ensile Agbara MPa | Elonga tion% | Eto titilai % | Hardness Shore A | Toluene Solusan Viscosity ni 25 ℃ ati 25%, mpa.s |
| YH-501/501T | Laini | 30/70 | 5 | 20.0 | 490 | 24 | 76 | 600 |
| YH-502/502T | Laini | 30/70 | 4 | 27.0 | 540 | 16 | 73 | 180 |
| YH-503/503T | Laini | 33/67 | 6 | 25.0 | 480 | 16 | 74 | 2,300 |
| YH-504/504T | Laini | 31/69 | 5 | 26.0 | 480 | 12 | 74 | |
| YH-561/561T | Adalu | 33/67 | 6.5 | 26.5 | 490 | 20 | 80 | 1.200 |
| YH-602/602T | Irawọ ni apẹrẹ | 35/65 | 6.5 | 27.0 | 500 | 36 | 81 | 250 |
| YH-688 | Irawọ ni apẹrẹ | 13/87 | 1.4 | 10.0 | 800 | 4 | 45 | |
| YH-604/604T | Irawọ ni apẹrẹ | 33/67 | 5.8 | 30.0 | 530 | 20 | 78 | 2.200 |
Akiyesi: Itọpa ojutu toluene ti YH-501 / 501T jẹ 20%, ati pe ti awọn miiran jẹ 10%.
"T" tumo si omi desalted.