E-Shell® 300 M系列

The EnvisionTEC E-Shell 300 M Series has been designed especially for applications in the Hearing Aid industries and is distinguished for rigidity and durableness. EnvisionTEC E-Shell 300 M is a liquid, photo-reactive acrylate for building functional parts. It is CE certified and Class-IIa biocompatible according to ISO 10993 (Medical Product Law) for Hearing Aid shells and otoplastics. They are tough, opaque, water- and perspiration-resistant and available in several different transparent tones like water clear, rosé clear, red, and blue.

→ E-SHELL Instructions for creation of HEARING AID SHELLS and/or EARMOLDS


Key Features
» Tough function prototypes

» Appearance models with minimal finishing

» Durable concept models with high cross linkage

» High humidity environment applications

» RTV patterns

» Water resistant applications

» Hearing aid devices manufacturing

Physical Properties


339.8 mPa*s (ASTM Method DIN 1342-2)

Tensile Strength

51.6 MPa (ASTM Method DIN EN ISO 527-1)

Elongation at Yield

6.62 % (ASTM Method DIN EN ISO 527-1)

Bending Strain

8.43 % (ASTM Method DIN EN ISO 178)

Flexural Modulus

1,920 MPa (ASTM Method DIN EN ISO 178)

Flexural Strength

88.4 MPa (ASTM Method DIN EN ISO 178)

Izod Impact – Notched

4.99 kJ/m2 (ASTM Method DIN EN ISO 180)


1.185 g/cm3 (ASTM Method DIN ISO 1183-1)

Hardness (Shore D)

85 Shore (ASTM Method DIN EN ISO 868)

Glass Transmission Temperature

86 °C – 160 °C (ASTM Method D570-98)

Recommended Machines