| UP 5690-W or-K POLYOL | UP 5690 ua ISOCYANATE | UP 5690 ua C | MIXED | ||
| Kev sib xyaw | Polyol | Isocyanate | Polyol | ||
| Sib tov piv los ntawm qhov hnyav | 100 | 100 | 0-50 | ||
| Yam | ua kua | ua kua | ua kua | ua kua | |
| Xim | W = WhiteK = Dub | Tsis muaj xim | Mis dawb | AW/B/C=White AK/B/C=Black | |
| Viscosity ntawm 23 ° C (mPa.s) | BROOKFIELD LVT | 1000-1500 | 140-180 Nws | 4500-5000 | 500-700 |
| Viscosity ntawm 40 ° C (mPa.s) | BROOKFIELD LVT | 400-600 | - | 2300-2500 Nws | 300-500 |
| Lub ntiajteb txawj nqus tshwj xeeb ntawm 25 ° CSpecific gravity ntawm kho cov khoom ntawm 23 ° C | ISO 1675: 1975 ISO 2781: 1988 | 1.06- | 1.15- | 1.06- | -1.13 |
| Lub neej nyob ntawm 25 ° C ntawm 100 g (min) | 10-15 | ||||
| Lub neej nyob ntawm 40 ° C ntawm 100 g (min) | 5 - 7 |
PROCESSING CONDITIONS (Lub tshuab nqus tsev casting)
• Preheat isocyanate rau 23 - 30 ° C yog tias khaws cia qis dua 20 ° C.
• Preheat polyol thiab seem C rau 40 ° C ua ntej siv.Nws yog tsim nyog los do lub polyol kom txog thaum ob qho tib si xim thiab nam ua homogeneous.
• Ntsuas cov khoom raws li qhov sib xyaw ua ke, muab isocyanate rau hauv lub khob sab saud, ntxiv qhov C hauv polyol rau premix.
• Ncuav isocyanate rau hauv polyol (muaj Part C) thiab sib tov rau 1 - 2 feeb tom qab degassing rau 10 feeb sib cais.
• Muab pov rau hauv lub tshuab nqus tsev hauv silicone pwm preheated rau 70 ° C.
• Demould tom qab 60 - 90 feeb ntawm 70 ° C (Qhov ntau C yog siv, lub sij hawm demoulding ntev dua)..
| A / B / C | 100/100/0 | 100/100/20 | 100/100/30 | 100/100/50 | ||
| Hardness | TS EN ISO 868: 2003 | Ntug Dej D | 83 | 80 | 78 | 75 |
| Tensile zog | TS EN ISO 527: 1993 | MPa | 35 | 30 | 28 | 25 |
| Flexural zog | TS EN ISO 178: 2001 | MPa | 50 | 35 | 30 | 20 |
| Flexural modulus | TS EN ISO 178: 2001 | MPa | 1300 | 1000 | 900 | 600 |
| Elongation thaum so | TS EN ISO 527: 1993 | % | 50 | 60 | 65 | 90 |
| Kev cuam tshuam lub zog(CHARPY) Unnotched cov qauv | ISO 179/2D: 1994 | KJ/m2 | 100 | 90 | 85 | 75 |
| A / B / C | 100/100/0 | 100/100/20 | 100/100/30 | 100/100/50 | ||
| Cov iav hloov pauv kub (Tg) | (1) | °C | 85 | 78 | 75 | 65 |
| Linear shrinkage | % | 0.35 Nws | 0.35 Nws | 0.35 Nws | 0.35 Nws | |
| Lub sij hawm demoulding (2 - 3mm) ntawm 70 ° C | min | 60-90 | ||||
Nruab nrab tus nqi tau on txheem cov qauv / Hardening 16hr at 80 °C tom qab demoulding.
Kev Tiv Thaiv Kev Tiv Thaiv
Kev noj qab haus huv thiab kev nyab xeeb yuav tsum tau ceev faj thaum tuav cov khoom no:
Xyuas kom muaj qhov cua zoo
Hnav hnab looj tes, tsom iav kev nyab xeeb thiab khaub ncaws tiv thaiv.
Yog xav paub ntxiv, thov mus saib cov ntaub ntawv kev nyab xeeb ntawm cov khoom.
Kev cia khoom
Txee lub neej yog 6 lub hlis nyob rau hauv qhov chaw qhuav thiab nyob rau hauv thawj qhov chaw tsis qhib ntim ntawm qhov kub ntawm 15 thiab 25 ° C. Txhua qhov qhib yuav tsum tau kaw nruj nreem nyob rau hauv qhuav nitrogen daim pam.
