Plastic Materials Selection Guide for Micro Machining & Micro Molding

Micro molding and micro machining plastic materials selection starts with an understanding of the most important design inputs a plastic will need to satisfy the functional requirements of the MIS device. Selecting a plastic is based on a number of traditional material requirements, such as strength, stiffness, or impact resistance. In addition, MIS devices can have their own set of unique material requirements, such as biocompatibility, sterilization, implantability, radiopacity, and chemical resistance. Addressing the following list of questions will ensure the designer and supplier create an optimum component for micro machining or micro molding and for the MIS device application.

  1. Are there any important functional requirements needed?
  2. Is material certification required?
  3. Does the micro machining or micro molding process need to be in a controlled environment?
  4. Will it have contact with body tissue of fluids? How long?
  5. Single use device? If not, what is the expected usage amount?
  6. Will the component go under sterilization? What type?

The table lists the most common variables (design inputs) to be considered for high performance plastics. The plastics identified in the table are the most frequently used for micro molding and micro machining components used in MIS devices. A table like the one shown can provide general guidelines of finding a suitable high performance plastic for any MIS device application. Screening high performance plastics used for micro molding and micro machining MIS devices will help minimize risk and eliminate adverse results during design verification. The table can serve as a “living” document and can be updated as new plastics enter the market for micro machining and micro molding.

Plastic Materials Selection Guide

High Performance Plastic
Selection Table
Acronym Common Name Trade Name Chemical Resistance Creep Resistance Dielectric Strength Dimensional Stability Fatigue Resistance Flexibility Flexural Modulus (Stiffness) Heat Resistance Impact Strength (Toughness) Stress Crack Resistance Tensile Strength Warp Resistance Wear Resistance USP Class VI ISO 10993 Implantable Bonding High Flow into Thin Walls Laser Friendly Micromachining Friendly Metal Replacement Vapor Polishing Weld Line Strength Auto clave EtO Radiation (gamma, e-beam)
Amorphous Plastics
ABS Acrylonitrile Butadiene Styrene Lustran® + + + + + + + + + + + +
PC Polycarbonate Lexan®, CALIBRE™, Makrolon® + + + + + + + + + + + + + + +
PEI Polyetherimide Ultem®, Duratron® + + + + + + + + + + + + + + + + + +
PES Polyethersulfone Radel®A, Ultrason®E + + + + + + + + + + + + + +
PMMA Polymethyl Methacrylate (Acrylic) Plexiglas® + + + + + + + + + + +
PPSU Polyphenylsulfone Radel®R, Veriva™, Ultrason®P + + + + + + + + + + + + + + + + + +
PSU Polysulfone Udel®, Eviva®, Ultrason®S + + + + + + + + + + + + + + + + + +
TPU Thermoplastic Urethane ChronoThane™, Tecothane™, Pellethane™, Tecoflex + + + + + + + + + + +
Thermoplastic Silicone Polycarbonate Urethane Carbosil® + + + + + + + + + + +
Thermoplastic Polycarbonate Urethane Bionate™, Chronoflex®, Carbothane + + + + + + + + + + +
Engineered Thermoplastic Urethane Isoplast® + + + + + + + + + + + +
Semi-Crystalline Plastics
LCP Liquid Crystal Polymer Vectra® + + + + + + + + + + + + + + + + + + +
PA Nylon Grilamid®, Rilsamid®, Rilsan® + + + + + + + + + + +
PARA Polyarylamide Ixef® + + + + + + + + + + + +
PAEK polyaryletherketone AvaSpire® + + + + + + + + + + + + + + + +
PEEK Polyetheretherketone Victrex®, KetaSpire®, Invibio®, Zeniva®, Ketron® + + + + + + + + + + + + + + + +
PMP Polymethylpentene TPX® + + + + + + + + + + +
PP Polypropylene ExxonMobil™, TECAPRO™ MT + + + + + + + + + +
PPS Polyphenyl Sulfide Ryton® + + + + + + + + + + + + + +
TPE Thermoplastic Elastomer Versaflex™ + + + + + + + + + + + + + +
Thermoplastic Nylon Elastomer Pebax® + + + + + + + + + +
Bold text Trade Name - Denotes suitable for implantable devices

< Back

Mikrotech, LLC
9900 58th Place
Kenosha, WI

Tel 262.577.0232