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Delrin® for Medical Devices
Delrin® SC637 Acetal Resin
for Medical Devices
Uniting low friction with superior mechanical strength.
Product overview
Delrin® SC637 is a friction-modified and nucleated medium-high viscosity
acetal homopolymer developed for high performance parts. It delivers
exceptional sliding performance while preserving the material’s inherent
strength and stability—enabling devices to operate smoothly, reliably, and
safely with every use.
What is SC?
The SC designation in Delrin® SC637
stands for Special Control. Delrin SC grades
experience a high amount of testing, and they
offer a greater degree of manufacturing
control and broad regulatory compliance:
• Produced according to Good Manufacturing
Practice (GMP)
• Acquired food contact statements
• Testing against selected parts USP Class VI
• Testing against relevant parts ISO 10993
• Sterilization data
• Global availability
• Extended change notification
Pictured: Dry Powder Inhaler and
Autoinjector devices with spring loaded
parts and moving internal components.
Comparison of Delrin® SC637 with low friction
POM copolymer grades
Features
• Reduced coefficient of friction
• Tolerant to high fatigue loading
• Enhanced tensile strength and stiffness
• Dimensional stability
• Creep resistance and excellent
impact toughness
• Good colorability
Benefits
• Sterilizable*
*Not suitable for gamma irradiation and
E-beam technology
• Smooth and precise activation of
devices for easier patient operation
• Improved safety factors and
device reliability
• Reduced risk of component wear
in repeat use products
• Tight tolerances for complex
mechanical arrangements
• Potential to design more
compact systems
• Visually appealing parts
POM copolymer (low friction) A
Delrin®SC637
POM copolymer (low friction) B
Initial friction measurements: comparative
testing of material on itself
Coefficient of friction at an applied force of 20 N at a
reciprocating frequency of 2.39 Hz (30 cm/s linear speed)
Real-time Tensile Creep at 40°C (20.7MPa loading)
Typical applications
• Clamps, clips and connectors
• Valves and pumps
• Diagnostics
• Dry powder inhalers
• Injector Pens
• Autoinjectors
• Fluid control and gas handling
• Prosthetics
• Surgical instruments
Delrin® SC637 NC010 acetal resin
Properties
Value
Units
Test method
Tensile modulus
3200
MPa
ISO 527-1/-2
Yield stress
70
MPa
ISO 527-1/-2
Yield strain
14
%
ISO 527-1/-2
Nominal strain at break
35
%
ISO 527-1/-2
Flexural modulus
3100
MPa
ISO 178
Charpy impact strength, 23°C
300
kJ/m2
ISO 179/1eU
Charpy notched impact strength, 23°C
9
kJ/m2
ISO 179/1eA
Melt mass-flow rate (190°C, 2.16kg)
7.5
g/10min
ISO 1133
Poisson’s ratio
0.37
–
–
Molding shrinkage, parallel
1.9
%
ISO 294-4, 2577
Molding shrinkage, normal
1.8
%
ISO 294-4, 2577
For complete data visit Delrin® Material Data Center at https://delrin.materialdatadenter.com
To learn more, contact your Delrin representative or visit Delrin.com.
The information and recommendations contained herein are offered as a service toour customers but are not intended to relieve the user from its responsbility to
investigate and understand other pertinent sources of information and to complay with all laws and procedures applicable to the safe handling and use of these
materials. The information and recommendations provided herein were believed by Delrin to be accurate at the time of preparation or obtained from sources believed
to be generally reliable. However, Delrin makes no warranty concerning their accuracy and Delrin will not be liable for claims resulting from any party’s use of or
reliance on information or recommendations contained herein regardless of whether it is claimed that the information or recommendation are inaccurate, incomplete
or otherwise misleading. Caution: fFor medical applications discuss with a Delrin customer representative and consult the Delrin® Medical Caution Statement.
Delrin® is an industry-leading premium industrial polymer business. Grounded in strong innovation, Delrin is a category creator with a longstanding reputation for
quality, reliability, supply and product performance. The iconic Delrin brand, coupled with proprietary technology and deep application expertise make us a leader
in the high-end engineering polymer market. Delrin has exciting growth prospects from exposure to automation, actuation, healthcare, mobility and consumer
applications.
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