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If you are sourcing TPEE for automotive parts, wire and cable jacketing, industrial hoses, or flexible connectors, choosing the right manufacturer determines whether your end product meets long-term performance requirements. Zhejiang Joysun Advanced Material Co., Ltd. is a professional TPEE manufacturer with a full-range hardness portfolio, independent R&D capability, and an annual production capacity of 70,000 metric tons across two factory sites. All grades are traceable, tested against published technical data, and available with export documentation.
TPEE (Thermoplastic Polyester Elastomer) is a block copolymer composed of hard polyester segments and soft polyether or polyester segments. The ratio of hard to soft segment controls hardness, modulus, heat resistance, and chemical resistance. Unlike TPU or TPR, TPEE combines elastic recovery with higher continuous-use temperature tolerance and better resistance to hydrolysis under humid or fuel-exposed environments.
Because the hard-to-soft segment ratio shifts every mechanical and thermal property simultaneously, selecting the correct grade is not optional — an undersized Shore D leads to creep failure under load, while an oversized hardness causes cracking under repeated flexing. Engineers routinely search for TPEE by Shore D range, flexural modulus, MFR (Melt Flow Rate), and application compatibility before shortlisting suppliers.
Our high-performance TPEE lineup covers Shore D 29 through Shore D 82, divided into a Soft Series, Medium-Hard Series, and Hard Series. Below is a cross-grade reference based on published technical data sheets.
Grade 3016 belongs to the Soft Series. Shore D hardness is 29, flexural modulus 26 MPa, tensile stress 25 MPa, elongation at break 900%, melting point 172°C, density 1.071 g/cm³, and MFR 6 g/10 min at 190°C. It is the most flexible grade in the lineup and is suited for applications requiring extreme elastic recovery or very compliant sealing profiles.
Grade 4016 steps up hardness while maintaining a low modulus baseline. Engineers specifying flexible cable jackets, small-diameter tubing, or overmolded grips commonly evaluate 4016 when they need slightly more structural integrity than 3016 provides without sacrificing processability.
Grade 4320 is a transitional grade bridging soft and medium-hard behavior. Its processing window is compatible with standard single-screw extrusion lines, making it accessible for compounders who lack specialized equipment.
Grade 45211T carries a flame-retardant modification. Buyers specifying wire and cable insulation under IEC or UL flame classifications often need TPEE that retains halogen-free flame retardancy without significant degradation of mechanical properties — 45211T addresses this requirement directly.
Grade 5518 is positioned in the Medium-Hard Series. Shore D 55, flexural modulus 190 MPa, tensile stress 42 MPa, elongation at break 600%, melting point 200°C, density 1.188 g/cm³, and MFR 8 g/10 min at 230°C. The higher melting point relative to soft grades improves dimensional stability in under-hood automotive applications or components exposed to circulating hot air.
Grade 6319 offers Shore D 62, flexural modulus 279 MPa, tensile stress 43 MPa, elongation at break 500%, melting point 209°C, density 1.219 g/cm³, and MFR 9 g/10 min at 230°C. The combination of high modulus and 500% elongation makes it a reliable candidate for corrugated tubing, air duct systems, and articulated joints where both stiffness and repeated flexing occur.
Grade 72213 enters harder territory. Buyers specifying stiff but impact-tolerant industrial connectors or pneumatic fittings typically compare this grade against PBT or nylon alternatives when chemical resistance and elasticity need to coexist.
Grade 8218 is the hardest grade in the current lineup. Shore D 82 brings it close to rigid engineering plastic territory while still providing the elastic recovery that distinguishes TPEE from unreinforced polyester. Gear components, stiff tubing walls, and structural brackets in equipment with vibration exposure are typical use cases.
All grade-specific technical data sheets are available for download on each product page.
Hardness (Shore D) is the first filter most engineers apply. Soft TPEE (Shore D 25–45) is specified for sealing elements, cable jackets, and flexible connectors. Medium-hard TPEE (Shore D 46–65) is used for corrugated ducts, automotive CVJ boots, and coiled tubing. Hard TPEE (Shore D 66–85) serves structural brackets, stiff-wall tubing, and load-bearing clips.
Flexural modulus separates grades that look similar on hardness scales. Two materials with the same Shore D can have very different flexural modulus values depending on the hard segment architecture. Reference the published MPa values rather than relying on hardness alone when designing for bending loads.
Melt Flow Rate determines processing compatibility. Grades with lower MFR require higher processing temperatures or back-pressure adjustments on injection molding machines and extruders. Matching MFR to your processing line avoids melt fracture, inconsistent wall thickness, or bridging issues.
Melting point affects part performance in service. Joysun TPEE grades span 172°C (Grade 3016) to over 210°C (Grade 6319 and above), giving designers meaningful latitude when specifying for environments with elevated ambient temperatures.
Elongation at break indicates how far a part can stretch before failure. The 900% elongation of Grade 3016 is unusually high for an elastomer at that hardness level. For applications involving repeated stretch cycles — cable management clips, bellows, or expansion joints — high elongation at break reduces fatigue crack initiation.
Chemical resistance is a system-level property. TPEE generally resists hydrocarbon fuels, lubricating oils, weak acids, and alcohols better than TPE or TPR while remaining less chemically robust than PTFE or fluoropolymers. Buyers specifying fuel system components or automotive fluid-contact parts should request chemical compatibility data sheets alongside mechanical data.
TPEE should be dried before processing. Moisture absorbed during storage causes hydrolytic degradation during melt processing, which irreversibly reduces molecular weight and mechanical properties. A dehumidifying dryer set at 80–100°C for 4 hours is standard practice for most grades. Higher-hardness grades with higher melting points may require longer drying times.
For injection molding, mold temperature of 20–60°C and melt temperature 20–30°C above the published melting point provides a practical starting range. Gate design should avoid abrupt cross-section changes that increase shear heating. TPEE crystallizes on cooling, so mold temperatures on the upper end of the range improve surface finish and reduce sink marks in thicker sections.
For extrusion of tubing, hose, or cable jacketing, a single-screw extruder with a compression ratio of 2.5:1 to 3:1 is appropriate for most grades. Screen pack use is recommended to remove gels. Downstream cooling in water baths should be gradual enough to avoid internal stress from rapid quenching in thicker-wall profiles.
Joysun's R&D team can provide application-specific processing recommendations for new product developments. Buyers with non-standard processing requirements — co-extrusion with other polymers, multi-layer film structures, or specialty compounding — are encouraged to reach out directly.
Automotive is the largest end market for medium-hard and hard TPEE grades. Typical applications include CV joint boots, air intake ducts, windshield wiper components, fluid connectors, and cable grommets. TPEE outperforms EPDM in automotive fuel-contact parts due to better resistance to fuel swelling. Its recycling-compatible thermoplastic nature also supports lightweighting initiatives where rubber vulcanizates were previously used.
Wire and cable is a primary application for soft to medium TPEE grades, particularly grades with flame retardant modifications such as 45211T. Telecommunications cables, industrial power cables, and data cables benefit from TPEE's combination of flexibility at low temperatures, abrasion resistance, and processability on standard cable extrusion lines.
Industrial hose and tubing manufacturers specify TPEE for pneumatic tubing, hydraulic return lines, chemical transfer hose covers, and food-grade tubing structures. The material's ability to be extruded into precise tolerances with smooth inner bores makes it competitive with nylon and PU in many fluid-handling applications.
Consumer and sporting goods applications include ski boots, inline skate components, protective equipment hinges, and medical device tubing. The combination of stiffness control, elastic recovery, and color capability (TPEE is readily pigmented) makes it versatile for design-intensive products.
Electronics and electrical connectors use harder TPEE grades as overmold materials on connector bodies, where dimensional stability under repeated mating cycles and resistance to moisture ingress are primary requirements.
Material consistency batch to batch is the main reason buyers prefer working directly with the manufacturer rather than spot-trading through distributors. Every batch should be traceable to raw material inputs, synthesis conditions, and quality test results. Joysun holds ISO 9001 quality management certification and has been recognized as a National High-Tech Enterprise, a Zhejiang Province Specialized, Refined, Unique and Innovative SME, and a provincial-level Postdoctoral Research Station cooperative enterprise.
The company was established in 2005, relocated synthesis and production to the Dushangang Chemical Industrial Park in Pinghu in 2016, and has served over 600 clients worldwide. The dual-factory structure supports 70,000 tons per year of combined capacity across multiple product lines including TPEE, chemical foaming agents, PVC Ca-Zn stabilizers, and SPC/WPC floor one-pack additives.
Buyers who need complementary products — for example, TPEE alongside NVH expandable sealants for automotive assembly, or PVC flame retardants for cable applications — can consolidate sourcing with one supplier, simplifying logistics and supplier qualification.
Export documentation, import/export licensing, and AEO Advanced Certification from Chinese customs (awarded 2025) support compliant cross-border shipment to major markets including Europe, Southeast Asia, North America, and the Middle East.
Start with the required Shore D hardness based on application stiffness and flex requirements. Cross-reference flexural modulus to confirm the material will behave as intended under bending loads. Check the melting point against your maximum service temperature, adding at least a 20–30°C safety margin. Review the MFR against your processing equipment's capability. If flame retardancy is required, specify Grade 45211T or contact the technical team for compound development options.
When standard grades do not precisely match the specification, Joysun's R&D capability supports custom compound development. The company holds multiple national invention patents in materials science and collaborates with Zhejiang University, Zhejiang University of Technology, and Qingdao University of Science and Technology on materials innovation.
For detailed technical data sheets, visit each grade page — 3016, 4016, 4320, 45211T, 5518, 6319, 72213, and 8218 — where downloadable PDFs are available. To discuss volume pricing, custom formulations, or sample requests, reach the sales team at sale@joysunsh.com or through the contact page.
