Pfupiso yezvinhu zve polyurethane foam
Foam yepolyurethane ipurasitiki ine chimiro chine maburi. Inoshandiswa zvakanyanya mumabasa akawanda akadai sekuvaka, fenicha, mota, kurongedza, nezvimwewo nekuda kwekupisa kwayo kwakanaka, kudzivirira ruzha, kunamatira uye hunhu hwemakanika. Kuumbwa kwefoam yepolyurethane inzira yakaoma yemuviri uye yemakemikari, umo macatalyst anoita basa rakakosha rekutonga.
Maitiro ekuumbwa kwefuro repolyurethane
Kuumbwa kwefuro repolyurethane kunosanganisira maitiro maviri makuru emakemikari: maitiro ekufumisa furo uye maitiro ejeli.
Kubuda kwefuro kunoreva maitiro ayo isocyanate (-NCO) inosangana nemvura kuti igadzire carbon dioxide (CO₂):
R-NCO + H₂O → R-NH₂ + CO₂↑
Gasi reCO₂ rinogadzirwa nekuita uku rinoita kuti musanganiswa wacho uwedzere kuita furo.
Maitiro egel anoreva maitiro ayo isocyanate inosangana ne polyol hydroxyl (-OH) kuti igadzire cheni ye polyurethane:
R-NCO + R'-OH → R-NH-CO-O-R'
Maitiro aya anosarudza simba rekupedzisira uye hunhu hwemuchina hwefuro.
Maitiro ekugadzira masero akavhurika neakavharwa mufuro
1. Maitiro ekugadzira furo remasero akavhurika
Kuumbwa kwefuro remasero akavhurika kunonyanya kukonzerwa nekuti kana kumanikidzwa kwakanyanya kunokonzerwa nebubble, madziro esero anoumbwa negel reaction haana kusimba zvakakwana kuti akwanise kumira kutambanudza membrane yemadziro kunokonzerwa nekuwedzera kwekumanikidzwa kwegasi, zvichikonzera kuputika kwebubble wall membrane uye kubuda kwegasi kubva pakavhurika. Hunhu uhwu hwechimiro hunopa furo remasero akavhurika hunhu hunotevera:
- Kupinda kwemhepo zvakanaka
- Kushanda kwakanaka kwazvo kwekunyudza ruzha
- Simba remuchina rakaderera
- Kupisa kwakanyanya
Mwero wemasero akavhurika (kana mwero wemasero akavharika) chiratidzo chakakosha chekuyera mashandiro efuro, izvo zvinokanganisa zvakananga maparamita makuru ekushanda akadai sekufambiswa kwemafuta mumhepo, kubvumidzwa kwehunyoro uye kugadzikana kwefuro mumhepo.
2. Maitiro ekugadzira furo remasero akavharwa
Kuumbwa kwefuro remaseru akavharwa kunoda kukurumidza kuyerera kwemafuta, izvo zvinowanzoitwa nekushandisa polyether polyols dzine mabasa akawanda, dzine huremu hwakaderera hwemamorekuru kuti dziite zvakafanana nepolyisocyanates. Muhurongwa uhu:
- Kumhanya kwekuita kwejeli kunokurumidza zvakakwana
- Simba remadziro esero rinowedzera nekukurumidza
- Gasi harigone kupwanya madziro esero
- Chimiro chefuro chinodzorwa nemasero akavharwa chinoumbwa
Foam yepolyurethane yakasimba ine masero akavharwa inoshandiswa zvakanyanya mumaindasitiri ekudzivirira kupisa nekuchengetedza zvinhu zvinotonhora nekuda kwekushanda kwayo kwakanaka kwekudzivirira kupisa. Mwero wayo wemazuva ese wekudzivirira kupisa unogona kusvika 90%-95%.
Kushandiswa kweMXC-37 (DMAEE)chinobatsira mufuro re polyurethane
MXC-37 (DMAEE) chinhu chinobatsira kugadzira amine chisina kunhuhwirira kwakanyanya uye chine mabhenefiti akasiyana mukugadzirwa kwefuro re polyurethane:
1. Hunhu hwechigadzirwa
- Kuburitsa furo rakawanda: rakakodzera zvikuru mafomura ane mvura yakawanda
- Kunhuhwirira kushoma: kunoderedza zvakanyanya kunhuhwirira kwemaamine mufuro
- Kugona kushandiswa nyore nyore: inogona kushandiswa sechinhu chikuru chinokonzeresa matambudziko chete kana kuti sechinhu chinobatsira pamwe chete neBDMAEE, nezvimwewo.
2. Nzvimbo huru dzekushandisa
- Foam yepolyurethane inopfapfaidzwa ine maburi mashoma, ine furo remvura (SPF)
- Furo rakapfava rakagadzirwa neEster-based stabilizer
- Furo re microcellular
- Elastomers
- Kuumbwa kwejekiseni rekuita (RIM) uye kuumbwa kwejekiseni rekuita rekuita rekusimbisa (RRIM)
- Zvishandiso zvekugadzira furo rakasimba
3. Zvakanakira zvehunyanzvi
MXC-37 (DMAEE) inogona:
- Gadzirisa chimiro chepore refuro
- Kuvandudza kugadzikana kwefuro
- Kuvandudza kunaka kwechigadzirwa
- Kuderedza Kubuda Kwemhepo Mumhepo Isingachinji (VOC)
Kusarudzwa uye KugadzirisaChinosimudzira Polyurethane
Mukugadzirwa chaiko, kusarudzwa kwezvinhu zvinokonzeresa kunofanirwa kutariswa nezvinhu zvinotevera:
1. Kuita zvinhu nenzira ye "reactivity": Sarudza chinhu chinobatsira pakuita zvinhu zvinoenderana nezvinodiwa nemaitiro acho
2. Zvinodiwa pakunhuhwirira: Zvinokonzera kunhuhwirira kushoma zvinofanirwa kusarudzwa kuti zvishandiswe pakushandiswa kusinganzwi kunhuhwirira
3. Mashandiro ezvakatipoteredza: Sangana nemitemo yezvakatipoteredza iri kuramba ichioma
4. Kushanda zvakanaka kwemari: Gadzirisa mari uchishandisa nzira iyi uchivimbisa kushanda kwayo
MXC-37 (DMAEE) ndiyo inonyanya kufarirwa nezvigadzirwa zvakawanda zve polyurethane foam yepamusoro nekuda kwekushanda kwayo kwakazara, kunyanya mukushandiswa kwayo zvine zvinodiwa zvakanyanya pakunhuhwirira uye kuchengetedzwa kwezvakatipoteredza.
Mhedziso
Zvishandiso zvePolyurethane zvine basa guru mukugadzirira zvinhu zvefuro. Mhando dzakasiyana dzezvishandiso zvinogona kudzora chimiro chepore, hunhu hwemuviri uye hunhu hwekugadzirisa furo. Sechishandiso chinoshanda uye chine hushamwari kune zvakatipoteredza, MXC-37 (DMAEE) inopa mhinduro yakakodzera yekugadzira furo repolyurethane, kunyanya kune zvigadzirwa zvefuro zvinoda kunhuhwirira kushoma uye kushanda kwepamusoro. Nekuvandudzwa kuri kuramba kuchiitwa kwezvinodiwa zvekuchengetedza nharaunda uye kufambira mberi kwetekinoroji, rudzi urwu rwechishandiso chinoshanda zvakanyanya ruchaita basa rakakosha muindasitiri yepolyurethane.
Nguva yekutumira: Kubvumbi-22-2025