YC – YR Product Systems
These are systems designed for making high performance flooring, electric poles, traffic light poles, gas cylinder
- YC 8933 – Constructing of high performance flooring
- Regulations on volatile matter content
- High speed railway damping system
- PU fiber reinforced composite materials
- Synthetic PU material used to produce electric poles
1. Construction process
2. Application scenarios
- Classroom, lecture hall & meeting room
- Library, reading room
- Kitchen, dining room
- Laboratory
- Waiting room
Requirements for limits on hazardous substances in floor covering materials (Type S)
| No. | Criteria | Limit |
| 1 | Volatile Organic Content (VOC> (g/L) | ≤ 120 |
| 2 | Free formaldehyde content (mg/kg) | ≤ 100 |
| 3 | Total benzene, toluene, ethylbenzene, xylene (g/kg) | ≤ 5 |
| 4 | Free Diisoamioester (TDI, HDI) limit on type of polyurethane (g/Kg) | ≤ 2 |
| 5 | Total ether glycol and ester, ether contents (mg/kg) | ≤ 300 |
| 6 | Free 4,4-diaminodiphenylmethane content (g/kg) | ≤ 10 |
| 7 | Soluble heavy metals (mg/kg) | |
| Lead(Pb) | ≤ 30 | |
| Cadmium (Cd) | ≤ 30 | |
| Chromium (Cr) | ≤ 30 | |
| Mercury (Hg) | ≤ 10 | |
| 8 | Total volatile organic content(TVOC), Emmision (mg/m) | ≤ 10 |
| 9 | Formaldehyde emmision (mg/m) | ≤ 0.1 |
| Physical Properties | |
| Compression deformation rate (%) | 4.5~5.0 |
| Oil resistance (%) | < 4.3 |
| Resistance value (108 W) | > 8.0 |
| Tensile strength (MPa) | > 4.9 |
| Breaking elongation (%) | > 300 |
| After Aging | |
| Tensile strength (MPa) | > 5.0 |
| Breaking elongation (%) | > 500 |
| Static stiffness before durability (kN/mm) | 20~25 |
| Joint stiffness before durability test (kN/mm) | 25~28 |
| Static stiffness variation after durability test (%) | ≤20 |
| Join stiffness variation after durability test (%) | ≤20 |
| Sample thickness change after durability (%) | ≤10 |
| Physical Properties | |
| Appearance (A/B) | Amber/Brown |
| Viscosity at 25°C (A/B)(mPa.s) | 650±150/200±50 |
| Hardness (Shore D) | 86±5 |
| Density (g/cm3) | (1.20±0.1 |
| Elonggation at break (%) | (5±0.5) |
| Tensile strength (MPa) | 70±10 |
| Tensile modulus (MPa) | 3500±500 |
| Bending strength (MPa) | 90±10 |
| Flexural modulus (MPa) | 1800±200 |
| Temperature tolerance range | -30°C~80°C |
| Operational time | 30~60min |
Advantages of synthetic PU materials
- High strength-to-weight ratio
- High energy saving
- Excellent corrosion resistant and weather resistant
- Tailor-made properties for specific design conditions
- Lightweight, easy to transport
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