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A Revolutionary Breakthrough In Spring Technology!

Now Even STRONGER Spring Rates

Plastic Composite Springs are a response to increased requests for springs that combine the strength of metal with the special attributes of high performing engineered thermoplastics.  After years of extensive engineering design and materials research, this unique compression spring has been developed.

Plastic Composite Springs are a new and unique spring designed to meet a wide range of applications where non-corroding, non-metallic, inert materials are preferred.  Plastic Composite Springs combine the strength of metal with the special attributes of high performing engineered thermoplastics.

Plastic Composite Springs are fabricated in distinctive formulations of Ulem™ PEI resins, the material of choice for meeting the most exacting specifications.  Springs are stocked in a variety of standard sizes, each available in a “rainbow” of strengths formulated from different Ulem™ resisns.  The six increasing strengths are easily identifiable by distinct colors: Red, Orange, Yellow, Green, Blue and Violet.


  • Unique patent pending designs to maximize spring rates and cycle life, while minimizing solid height
  • High strength to weight ratios that optimize performance while reducing mass
  • Excellent stability of physical and mechanical properties at elevated temperatures up to 340°F
  • High corrosion resistance and generally compatible with many chemicals including strong acids, weak bases, aromatics, and ketones
  • Non-magnetic material does not interfere with imaging and other Ferro-sensitive technologies
  • Dielectric insulating material suitable for non-conductive applications
  • Inert, non-contaminating plastic composite protects product purity
  • Low flammability and toxicity, ensuring environmental safety
  • Recyclable and compliant with most global reguations, including RoHS and REACH

Plastic Composite Springs are Designed to Meet a Wide Range of Spring Applications Where Non-Corroding, Non-Metallic, Inert Materials are Preferred, Including:

  • Medical products and processing equipment
  • Pharmaceutical delivery devices
  • Imaging and X-Ray equipment
  • Food processing and packaging equipment
  • Aerospace products
  • Marine products
  • Electronics and electrical equipment
  • Water Purification systems
  • Chemical environments
  • Automotive interiors
  • Pollution Control systems
  • Semi-conductors
  • Instrumentation
  • Communication devices
  • Cosmetics packaging equipment
    For more information on Lee Spring solutions, please send an email to MyFeedback@dee-inc.com.  DEE is a Trusted Supplier and Expert in providing Cost Savings, Fast Multiple Solution Options, Supplier Reduction, and Time Savings.  We Help Manufacturers Find Solutions and Exceed Their Goals.™

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