PRODUCT DATA SHEET (TDS)
1. Product Identification
| Item | Details |
| Product Name | COPET Fiber Grade Alkali-Soluble Polyester Chip (Sea-Island Type) WD-1 |
| CAS No. | 25038-59-9 (Polyethylene Terephthalate, modified) |
| Appearance | Solid chips |
| Note | For sea-island fiber production |
2. Typical Specifications (Based on Test Result)
| Analysis Item | Unit | Test Value | Standard Specification |
| Intrinsic Viscosity | dl/g | 0.705 | M₀ ± 0.015 (M₀=0.70, standard) |
| Diethylene Glycol (DEG) | % | 2.81 | 2.9 ± 0.15 |
| Carboxyl End Group | mol/t | 14 | ≤ 15 |
| Melting Point | °C | 249 | ≥ 244 |
| Color Value (L) | – | 72 | ≥ 65 |
| Color Value (b) | – | 1.71 | M₁ ± 2 (M₁=2, standard) |
| Color Value (a) | – | -2.92 | ≤ -1.7 |
| Moisture Content | % | 0.2 | ≤ 0.4 |
| Solubility | % | 68 | 65 ± 5 |
3. Additional Notes & Test Methods
Notes on Specifications
- Viscosity Central Value (M₀): M₀ refers to the central value of intrinsic viscosity. The standard value is 0.70. If there are special requirements, the value can be agreed upon by both the supplier and the buyer and specified in the contract.
- Color Central Value (M₁): M₁ refers to the central value of color value (b). The standard value is 2. If there are special requirements, the value can be agreed upon by both the supplier and the buyer and specified in the contract.
Test Methods
All indicators are tested in accordance with GB/T 14190-93:
- Intrinsic Viscosity: Tested using a 1:1 (w/w) mixture of phenol and tetrachloroethane as solvent at 25°C.
- Melting Point: Determined by the microscopic method.
- Color Value: Measured using the Hunter three-color method.
4. Physical & Chemical Properties
- State: Solid chips at room temperature
- Material Type: Alkali-soluble copolyester (COPET) resin, specially designed for sea-island composite fibers
- Key Features: Good alkali solubility, controlled DEG content, low carboxyl end group, stable color values, suitable for sea-island spinning and subsequent dissolution processes
5. Applications
- Sea-island composite fiber production
- Microfiber and superfine fiber spinning
- Synthetic leather, high-density textile fabrics
- Products requiring alkali dissolution/finishing processes
6. Packaging & Storage
Packaging: 1000kg bags Storage Conditions: Store in a cool, dry, well-ventilated area. Protect from moisture, direct sunlight, and incompatible materials.Handling Precautions: Avoid dust inhalation. Use appropriate personal protective equipment (gloves, goggles) when handling.
