Conductive TPU and TPR for Flexible ESD Parts and Elastic Contact Components
This page is for buyers and engineers who need a conductive plastic solution based on real molded-part validation, not only a single resistance reading.
Buyer and engineer FAQ
Questions engineers often ask about this material route
Where can TPR / TPU with a conductive plastic requirement be used?
Typical fields include ESD trays, electronic housings, fixtures, EMI parts and antistatic logistics parts. For this article, DEYU would first confirm the working environment, wall thickness, expected lifetime and whether DGK-TPU DD3-4ML Conductive TPU, DGK-TPR DD6-9A Conductive TPR matches the part geometry or needs formulation adjustment.
What are the main performance indicators for the "conductive plastic" target on TPR / TPU?
Focus on surface resistance, volume resistance, dispersion uniformity, impact strength and molding stability. Buyers should ask for data on molded parts, not only pellet data, because gate position, filler orientation and thickness can change the final value.
What should engineers watch during injection molding or processing?
For TPR / TPU, a practical starting window is 170-210°C melt / 20-45°C mold. Avoid excessive filler loading, control weld lines and verify resistance on the molded part. Final parameters should follow part thickness, gate design and the actual machine.
What details help DEYU recommend DGK-TPU DD3-4ML Conductive TPU, DGK-TPR DD6-9A Conductive TPR more accurately?
Send the current resin or grade, drawing or photo, wall thickness, annual quantity, target standard, failure mode and required color. If a reference grade already passed one test but failed in production, include both data sets.
For a precise recommendation, share the part drawing, base resin, target performance, processing method and test standard with DEYU.
This page is for buyers and engineers who need a conductive plastic solution based on real molded-part validation, not only a single resistance reading.
DGK-TPU DD3-4ML Conductive TPU and DGK-TPR DD6-9A Conductive TPR. Selection should be based on hardness, elasticity, resistance range, wear behavior and processing route.
1. Background / Problem
Flexible ESD parts are different from rigid conductive housings. Sealing strips, electronic sleeves, soft contact pads and flexible clips need conductivity while still bending, compressing and recovering repeatedly.
If the material is too hard, assembly and sealing may fail. If it is too soft or poorly dispersed, resistance and wear may drift during use.
2. Technical Difficulty / Why It Happens
Conductive elastomers must balance resistance, hardness, elasticity, wear resistance and processing. A filler route that works in rigid PP or ABS may make TPU or TPR too stiff, too rough or unstable after bending.
For flexible parts, the test should include surface resistance after bending, hardness, compression recovery, abrasion behavior and extrusion or injection stability.
3. DEYU Material Direction
DEYU may recommend DGK-TPU DD3-4ML when the project needs conductive TPU with 10^3-10^5 ohm resistance, 85A-95A hardness, good wear resistance and elasticity.
DEYU may recommend DGK-TPR DD6-9A when a softer TPR direction is needed, with 10^5-10^6 ohm resistance, hardness 78A +/-2 and good elasticity.
4. Reference Product Data
| Grade | Base resin | Conductive / hardness direction | Processing | Typical applications |
|---|---|---|---|---|
| DGK-TPU DD3-4ML | TPU | 10^3-10^5 ohm; hardness 85A-95A; good wear resistance and elasticity | Injection molding / extrusion | Wear-resistant soft conductive parts, sealing strips, electronic sleeves |
| DGK-TPR DD6-9A | TPR | 10^5-10^6 ohm; hardness 78A +/-2; good elasticity | Injection molding / extrusion | Sealing strips, soft ESD parts, electronic sleeves |
5. Real Customer Application Case
A customer needed a flexible ESD strip for electronic handling equipment. A rigid conductive plastic passed resistance testing but could not seal. A soft elastomer passed assembly, but resistance rose after repeated bending.
6. Validation Data Table
| Item | Rigid conductive plastic | Previous soft elastomer trial | DEYU TPU / TPR trial direction |
|---|---|---|---|
| Trial length / quantity | 300 m | 500 m | 800 m |
| Surface resistance before bending | 10^4-10^5 ohm | 10^6-10^7 ohm | TPU target 10^3-10^5 ohm; TPR target 10^5-10^6 ohm |
| Surface resistance after repeated bending | Stable but too rigid | 10^8-10^10 ohm | Target remains in selected ESD range |
| Assembly complaint rate | 8.0% | 2.5% | Target <2.0% |
| Wear / surface powdering | Low | Medium | Target controlled by material route |
| Compression recovery issue | High | Low | Target low |
| Internal pass rate | 70% | 82% | Target >90% |
This case is based on a real customer scenario from DEYU's internal project records.
7. Result Interpretation
For flexible conductive parts, the right material is not always the lowest-resistance material. The selected route must match hardness, bend radius, contact pressure, wear conditions and the processing method.
TPU is often preferred when wear resistance and higher hardness are needed. TPR may be more suitable when softer sealing feel and elasticity are more important.
8. Suitable Applications
- Flexible ESD strips
- Conductive TPU sleeves
- Conductive TPR sealing profiles
- Elastic contact pads
- Soft electronic handling parts
- Wear-resistant flexible conductive components
9. What Buyers Should Provide
Buyers should provide the target resistance range, required hardness, bending radius, contact pressure, abrasion condition, processing method, part drawing, color requirement and whether TPU or TPR is preferred.
Conclusion
Final selection should be confirmed on the actual molded part: resistance, processing, mechanical behavior, appearance and service conditions need to be evaluated together.
