- Polymer[10]
- Sandwich Panels[2]
- Contact Person : Mr. Kong Andy
- Company Name : Shandong Lecron Energy-Saving New Material Co., Ltd.
- Tel : 86-533-3085999
- Fax : 86-533-3085988
- Address : Shandong,Zibo,Chuangye Road, Economic Development Zone, Zhangdian
- Country/Region : China
rigid pu system for refrigerator foam insulation
rigid pu system for refrigerator foam insulation
1.General description
ZLC-1001A foam system is a two part polyurethane system comprises a blend polyol and isocyanate component.When mixed in their correct proportions produce a fine-celled foam layer/insulation developed for the manufacture of refrigerators,freezers,air condition duct and so on.The system can be processed by filling with dispensing machine or by manual mixing.
2.Characteristics
2.1 Physical characteristics
Component A-blend polyol | Component B-polymeric mdi | ||
Parameter | Value | Parameter | Value |
Hydroxyl Value(Mg • HOK/g) | 400± 50 | Content of NCO (%) | 30-32 |
Viscosity at 25 ° C (mPa • s) | 350 ±100 | Viscosity at 25 ° C (mPa • s) | 170-250 |
Specific Gravity at 25° C (g/cm3) | 1.03 ~1.08 | Specific Gravity at 25° C (g/cm3) | 1.220~1.250 |
2.2 Process and reactive characteristics( actual value varied depends on the processing conditions)
Material temperature:20±2°C,lab testing
Index | Manual mixing | Low pressure machine | High pressure machine | |
Material temperature | °C | 15~25 | 15~25 | 15~25 |
Mold temperature | °C | 35~45 | 35~45 | 35~45 |
cream time | (S) | 13~15 | 11~14 | 10~13 |
gel time | (S) | 80~85 | 65~75 | 60~70 |
tack-free time | (S) | 110~130 | 85~110 | 90~110 |
free rise desity | (kg/M3) | 24~25 | 24~25 | 24~25 |
Note: ratio varied depends on system
2.3 Recommended ratio:
Formation | ZLC1001A |
Blend polyol | 100 |
Isocynate | 120 |
2.4 Foam characteristics
Testing items | Test method | QB/T2081-1995 Standard requirement | Company standard | |
Chinese standard | Referance ISO CODE or EN CODE | |||
Apparent core density (kg/m3) ≥ | GB/T 6343-2009 | ISO 845:2006 | 28~35 | 28~35 |
Closed-cell rate (%) ≥ | GB/T10799-2008 | ISO 4590:2002 | 90 | 92 |
Initial Thermal conductivity (W/m.k) ≤ | GB/T 3399-1982 | ISO 8301:1991(E) | 0.022 | 0.0196 |
Compressive strength or 10% deformation compressive stres (kPa) ≥ | GB/T 8813-1988 | ISO 844:1978 | 100 | 120 |
Dimensional stability (%) | GB/T 10295-1988 | ISO 2796:1980 |
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24h -20°C ≤ | 1 | 0.5~0.7 | ||
24h 100°C ≤ | 1.5 |
| ||
water absorption (V/V) % ≤ | GB/T 8810-2005 | ISO 2896:2001 | 5 | 4 |
Note: Whilst these technical details above are based on expert knowledge,practical experience and laboratory testing,successful application upon the nature and conditions in which the products are supplied.Users must,by comprehensive testing,evalute this product in their own application.
rigid pu system for refrigerator foam insulation
