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Thermoplastic Elastomer TPE68(SEBS) Used In Daily Necessities
1. Description
This is a thermoplastic elastomer based on SEBS. It’s safe, recyclable and environmentally friendly with soft touch, smooth surface and good elasticity and also excellent pigmentation as well as excellent weather and temperature resistance.
2. Application
It has wide applications in daily necessities, sports accessories, toys, decorative materials, auto parts and other applications.
3. Processing methods
It is used in injection, extrusion, calendaring and blow molding with good processing stability.
4. Product properties
| Typical Properties | Test Method | Typical values |
| Form | N/A | Pellet |
| Color | N/A | Nature |
| Hardness (shore A) | ASTM-D2240 | 68±3 |
| Specific Gravity (g/cm3) | ASTM-D792 | 1.1 |
| Tensile Stress (MPa) | ASTM-D412 | 7.5 |
| Tear Strength (N/mm) | ASTM-D624 | 38 |
| Ultimate Elongation (%) | ASTM-D412 | 620 |
*Above data for reference only.
*Testing conditions: 25℃, 80% RH
5. Processing & Guide
(1) Injection Moulding Guidelines
Mold Shrinkage: 0.015~0.025 inch/inch
Injection Speed: Medium-Fast
Injection Pressure: Medium-Fast
Back Pressure: Low-Medium
Holding Pressure: Sufficient to pack the mould
Cooling: It can be demoulded when parts have sufficiently cooled
Barrel Temperature (℃): 150-170 170-210 180-230 190-230 15-50
(2) Extrusion Guidelines
L/D Ration: 20:1-25:1
Compression Ratio: 2.5-3.0
Breaker Plate/Screen: Both should be used
Draw Down: 5-10%
Cooling: Cold water bath
Barrel Temperature (℃): 150-170 170-210 180-220 180-220 180-220
(3) Processing Notes:
① Normally need not drying, if absorbed moisture, pre-drying the particles for 2 to 4 hours at 80℃.
② Cleaning the screw and die with PP or PE before and after processing.
③ The gate and runner can be recycled, but less than 15%.
④ PE/EVA base color masterbatch is better for coloring.
6. Package
25kg/bag