Hydrogenated Styrenic Thermoplastic Elastomer (SEBS) Tuftec™ H1521

Asahi Kasei Tuftec™ H1521 is particularly designed as a modifier to increase flexibility of polypropylene (PP). Its excellent compatibility makes H1521 super-finely dispersed into PP. PP and H1521 blends provides transparent and flexible extruded products such as sheets, films and tubes. The blends are also applicable to injection molding due to its high MFR. It has excellent adhesion, which is suitable for the use of adhesive layer of protective films with hot-melt and pressure sensitive characteristics. H1521 meets USP Class Ⅵ standards. It may be used for medical applications after a special agreement with Asahi Kasei.


Physical Form

  • Supplied as a dusted, dence pellet

Features and Benefits

  • Substitute for PVC
  • High flexibility
  • High compatibility with PP
  • Excellent transparency
  • High adhesiveness
  • Heat sealability
  • Available for medical use
  • High flow properties


  • FDA 21 CFR FCN821
  • Regulation (EU) No 10/2011
  • USP Class Ⅵ


Property Test Method Unit Value
Specific Gravity ISO 1183 g/cm3 0.89
MFR 230°C, 2.16kg Load ISO 1133 g/10 min 15.0
MFR 190°C, 2.16kg Load ISO 1133 g/10 min 2.3
Durometer Type A
ISO 7619 °Shore A 39
Tensile Strength
Dumbbell: Type 1A 500 mm/min
ISO 37 MPa 12.5
Dumbbell: Type 1A 500 mm/min
ISO 37 % 810
300% Tensile Stress ISO 37 MPa 1.3
Styrene / Ethylene-Butylene Ratio Asahi Kasei Method 18/82

Please note that all data and values are given as typical results obtained with the indicated test methods for purposes of basic reference in grade selection only, and not as any product specification or warranty of any nature, and are subject to change without notice.

Please refer to Terms and Conditions and Privacy Policy


We, Asahi Kasei Group, request that customers who are considering using our products in medical, pharmaceutical, cosmetic and other related applications (hereinafter collectively called “Medical Applications”) shall contact us and confirm our policy on Medical Applications in advance. Information herein regarding conformity to certain laws and regulations are as of January, 2015. Please consult with us for the latest status. We make no guarantees or warranties, express or implied, concerning the suitability of our products for use in Medical Applications. It is not our responsibility to determine if our products are safe, lawful, and technically suitable for intended applications.