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Delrin® Product Sheet
Delrin® SC698 Acetal Resin
for Healthcare Devices
Delivering Low Friction for Smooth, Precise Actuation and Injection Performance
Delrin® SC698 acetal resin incorporates a lubricity additive and
features the lowest coefficient of friction (COF) in the company’s
expanded portfolio. Low COF—when moving against itself and
other materials—helps Delrin® SC698 resin provide smooth,
easy actuation for drug delivery devices like inhalers, injectors
and pumps. Patients can benefit from reduced effort, increased
comfort, dosing accuracy and consistent operation. Designers
and manufacturers can depend on Delrin® SC698 for a smooth
surface and good colorability.
Delrin® SC698 resin can also help to improve precise positioning
of wearable patches and minimize discomfort when inserting
pump connectors by enabling the use of smaller springs.
This highly crystalline homopolymer’s strength, stiffness and
fatigue resistance, combined with its ultra-low COF, deliver
excellent wear properties over time and repeated use. Its high
impact resistance helps protect against damage from drops.
For device OEMs, the strength, rigidity and dimensional stability
of Delrin® SC698 resin can allow the manufacturing of thinwall, complex and miniaturized designs without sacrificing
performance.
Processability – surface aspect
Pictured: Autoinjector with moving internal components
The medical device industry continues to innovate with
portable devices that are making home-care and selfadministration more convenient for patients. The unique
characteristics of Delrin® acetal resin (lubricity, toughness,
stability) play a key role in the success of moving internal
components for these devices.
What is SC?
The SC designation in Delrin® SC698 stands for Special
Control. Delrin SC resin grades experience a high amount
of testing, and they offer a great degree of manufacturing
control and broad regulatory compliance.
• Manufactured 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
Features
• Ultra-low coefficient of friction
• High tensile strength and stiffness
• Excellent creep resistance and dimensional stability
• High fatigue resistance and impact toughness
• Good colorability
• Attractive surface finish compared to other frictionmodified grades
• Sterilizable*
*Not suitable for gamma irradiation and E-beam technology
Benefits
Low friction
POM copolymer
Delrin® SC699
Delrin® SC698
• Smooth, precise actuation of high-load devices for easier
patient operation
• Excellent wear/friction performance and durability
• Attractive aesthetics that appeal to patients and
encourage use
• Expanded freedom to design thin-wall and complex parts
• System cost reduction through high-volume injection
molding
• Avoids need for external lubrication of components
Delrin SC698 with competitive
SlideX
Comparison
of Delrin® SC698 with low friction POM copolymer
100%
Melt mass-flow rate
Coefficient of friction against itself
0.3
75%
Surface aspect
Delrin® SC698
Tensile modulus
50%
25%
Low friction POM copolymer
0.2
0%
Stress at yield
Sliding performance
0.1
Stress at break
Delrin ® SC698 NC010
Low friction POM copolymer
Delrin ® SC690 NC010
COF after 15s
Target customers
Target applications
• Drug delivery devices
• Patch/connector inserters
Average COF after 2 min
• Medical device OEMs
• Device designers
• Gear systems
• Wearables
• Injection molders
• Pharmaceutical OEMs
Delrin® SC698 NC010 acetal resin
Properties
Value
Unit
Test method
Mold shrinkage, normal
1.8
%
ISO 294-4, 2577
Tensile modulus
MPa
ISO 527-1/-2
Yield stress
MPa
ISO 527-1/-2
Yield strain
%
ISO 527-1/-2
Nominal strain at break
%
Charpy impact strength, 23°C
Charpy impact strength, -30°C
ISO 527-1/-2
kJ/m
ISO 179/1eU
kJ/m
ISO 179/1eU
Charpy notched impact strength, 23°C
kJ/m
ISO 179/1eA
Charpy notched impact strength, -30°C
kJ/m
ISO 179/1eA
Poisson’s ratio
0.37
-
Melting temperature, 10°C/min
°C
Thermal conductivity of melt
0.22
W/(m K)
Spec. heat capacity of melt
J/(kg K)
ISO 11357-1/-3
For complete data visit Delrin® Material Data Center at https://delrin.materialdatacenter.com
To learn more, contact your Delrin representative or visit Delrin.com.
The information and recommendations contained herein are offered as a service to our customers but are not intended to relieve the user from its responsibility to investigate
and understand other pertinent sources of information and to comply 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 recommendations are inaccurate, incomplete or otherwise misleading. Caution: For 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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