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Polyurethane yog dab tsi?

Nov 26, 2025 Tso lus

Polyurethane yog dab tsi?
 

Cov ntsiab lus
  1. Polyurethane
    1. Isocyanates
    2.  
    3. Polyols
    4. Cov lej tseem ceeb peb saib ntawm lub khw hauv pem teb txhua qhov kev hloov pauv:
    5.  
    6. Lub tshuab tshuab lub cev tseem ceeb uas peb tau hloov mus rau xyoo tas los (Tuam Tshoj Phase- tawm HCFC-141b):
    7. Tej additives peb yuav tsum noj kom raug:
    8. Kev tswj qhov kub thiab txias:
    9. Polyol sab 22-28 degree, isocyanate sab 22-28 degree, pwm kub 40-65℃nyob ntawm cov khoom.

Polyurethane

 

Kuv lub npe yog Lao Zhang. Kuv tau tuav cov tshuab moulding ntawm ABIS Pwm txij li xyoo 2007, thawj zaug hauv kev txhaj tshuaj rhiav hauv Shenzhen rau cov qauv, tom qab ntawd hauv cov kab ntau lawm rau tsheb thiab khoom siv hluav taws xob. Nov yog qhov polyurethane tiag tiag yog thaum koj yuav tsum sib tov thiab ncuav nws txhua hnub hauv kev teeb tsa pwm.

 

polyurethane

 

Polyurethane (tag nrho cov tshuaj npe polyurethanes lossis PUR / PU)yog ib qho polymer tsim los ntawm cov tshuaj tiv thaiv ntawm ob pawg kua:

 

Isocyanates


Feem ntau hom peb siv:

TDI (Toluene Diisocyanate) - 80/20 lossis 65/35 sib tov

MDI (Diphenylmethane Diisocyanate) - crude MDI, polymeric MDI, los yog ua ntej-polymer

Qee zaum HDI lossis IPDI thaum yuav tsum tau yellowing kuj

 

polyurethane

 

Polyols

 

Polyether polyols (PPG, kev ua haujlwm 2-6, MW 200-8000)

Polyester polyols (lub zog siab dua, tus nqi siab dua)

Polyols tshwj xeeb (PTMEG, polycaprolactone, thiab lwm yam rau elastomers)

Thaum ob tog sib ntsib, lawv tsim cov urethane txuas (-NHCOO-). Nyob ntawm formulation koj tau txais cov qauv sib txawv:

Saj zawg zog ua npuas ncauj → ntev - saw polyols + qib dej siab → CO₂ tshuab → qhib hlwb

Rigid ua npuas ncauj → luv- saw polyols + dej tsawg + lub cev tshuab tshuab (245fa, cyclopentane, HFO) → kaw lub hlwb

Elastomers → 1000–4000 MW polyol + saw extender (BG, HQEE, MOCA) + tsis muaj tshuab tshuab → khoom roj hmab-zoo li cov khoom siv

CASE (Coatings, Adhesives, Sealants, Elastomers) → NCO/OH ratios and additives

 

Cov lej tseem ceeb peb saib ntawm lub khw hauv pem teb txhua qhov kev hloov pauv:

 

NCO % of the B-component (isocyanate side): feem ntau 18–32%
OH tus nqi ntawm A-cov khoom (polyol sab): 28–1000 mgKOH/g
Index: ib txwm 0.95–1.10 (100 txhais tau tias stoichiometric)
Lub sij hawm qab zib, lub sij hawm gel, tack- lub sij hawm dawb - ntsuas nrog lub sijhawm nres ntawm txhua pawg tshiab
Qhov ceev: ua npuas ncauj 15-60 kg / m³, rigid ua npuas ncauj 30-200 kg / m³, elastomer 1000-1250 kg / m³

 

Lub tshuab tshuab lub cev tseem ceeb peb tau hloov mus rau xyoo tas los(Tuam Tshoj Phase- tawm HCFC-141b):

 

Cyclopentane / iso-Pentane sib xyaw

HFC-245fa (tseem siv hauv qee lub tub yees xa tawm)

HFO-1233zd / 1336mzz (tshiab qis-GWP, kim)

 

polyurethane

 

Tej additives peb yuav tsum noj kom raug:

 

Dej (tshwj xeeb tshuab, 0.1-5.0 phr)

Amine catalysts (A33, A1) thiab tin catalysts (T9, Kosmos-19)

Silicone surfactants (B8xxx series) rau cell qhib / stabilization

Nplaim hluav taws xob (TCPP, DMMP, melamine, APP) rau cov ua npuas ncauj nruj

 

Kev tswj qhov kub thiab txias:


Polyol sab 22-28 degree, isocyanate sab 22-28 degree, pwm kub 40-65℃nyob ntawm cov khoom.

Qhov ntawd yog polyurethane hauv kev tsim khoom tiag. Ob lub kua dej nkag mus rau hauv, cua sov thiab roj tawm, tsib feeb tom qab koj muaj ib feem uas yuav softer dua li daim txhuam cev los yog tawv dua li ntau cov yas. Tag nrho lwm yam - xim, hardness, nplaim hluav taws xob, kev puas tsuaj - tsuas yog kev tsim ua haujlwm.

Ntawm ABIS Pwm peb khaws txhua cov polyol thiab isocyanate raws li cov ntaub ntawv sib cais, sau qhov ntsuas qhov tseeb thiab cov qib catalyst ib pawg, yog li thaum tus neeg siv khoom xav tau tib seem rau lub hlis tom qab peb tuaj yeem rov ua dua 100%.