Processing in the medical device industry has high requirements for measurement equipment and processing efficiency. From the perspective of the medical device workpiece itself, it requires high implantation technology, high precision, high repeatability positioning accuracy, high stability, and no deviation. The choice of materials is High-precision machining technology is one of the key influencing factors.Below are the best materials for metals and plastics commonly used for processing medical device products.
Content
I. Metal for medical devices
II. Plastics and composites for medical devices
I. Metal for medical devices:
The best workable metals for the medical device industry offer inherent corrosion resistance, ability to sterilize, and ease of cleaning. Stainless steels are very common because they do not rust, have low or no magnetism, and can be machined. Certain grades of stainless steel can be further heat treated to increase hardness. Materials such as titanium have a high strength-to-weight ratio, which is beneficial for handheld, wearable and implantable medical devices.
The following are commonly used metal processing materials for medical devices:
a. Stainless steel 316/L: Stainless steel 316/L is a highly corrosion-resistant steel that is widely used in medical devices.
b. Stainless steel 304: 304 stainless steel has a good balance between corrosion resistance and workability, making it one of the most widely used stainless steel alloys, but it cannot be hardened and heat treated. If hardening is required, 18-8 stainless steel is recommended.
c. Stainless steel 15-5: 15-5 stainless steel has similar corrosion resistance to stainless steel 304, with improved processability, hardness and high corrosion resistance.
d. Stainless steel 17-4: Stainless steel 17-4 is a high-strength, corrosion-resistant stainless steel alloy that is easy to heat treat. This material is commonly used in medical devices.
e. Titanium Grade 2: Titanium Grade 2 is a metal with high strength, low weight and high thermal conductivity. It is a high purity non-alloy material.
f.Titanium Grade 5: The excellent strength-to-weight ratio and the high aluminum content in Ti-6Al-4V increase its strength. This is the most commonly used titanium and has good corrosion resistance, weldability and formability.
II. Plastics and composites for medical devices:
The most common plastics used in medical devices have low water absorption (moisture resistance) and good thermal properties. Most of the materials below can be sterilized using autoclave, gamma, or EtO (ethylene oxide) methods. Low surface friction and better temperature resistance are also preferred by the medical industry. In addition to direct or indirect contact with housings, fixtures, and rails, plastics can serve as an alternative to metal where magnetic or radio frequency signals may interfere with diagnostic results.
The most common plastics used in medical devices have low water absorption (moisture resistance) and good thermal properties. Most of the materials below can be sterilized using autoclave, gamma, or EtO (ethylene oxide) methods. Low surface friction and better temperature resistance are also preferred by the medical industry. In addition to direct or indirect contact with housings, fixtures, and rails, plastics can serve as an alternative to metal where magnetic or radio frequency signals may interfere with diagnostic results.
The following are commonly used plastics and composites materials for medical devices:
a. Polyoxymethylene (acetal): The resin has good moisture resistance, high wear resistance and low friction.
b. Polycarbonate (PC): Polycarbonate has almost twice the tensile strength of ABS and has excellent mechanical and structural properties. Widely used in automotive, aerospace, medical and other applications requiring durability and stability. Solid filled parts can be fully densified.
c.PEEK: PEEK is resistant to chemicals, abrasion, and moisture, has excellent tensile strength, and is often used as a lightweight alternative to metal parts in high-temperature, high-stress applications.
d. Teflon (PTFE): Teflon’s chemical resistance and performance at extreme temperatures exceeds that of most plastics. It is resistant to most solvents and is an excellent electrical insulator.
e. Polypropylene (PP): PP has excellent electrical properties and little or no hygroscopicity. It can carry light loads over a wide range of temperatures for long periods of time. It can be machined into parts that require chemical or corrosion resistance.
f. Polymethyl methacrylate (PMMA): As a high-performance plastic material, PMMA has the characteristics of high transparency, good weather resistance, high hardness, and good chemical resistance. It is suitable for manufacturing medical devices, especially those circulating in the human body. Medical components in contact with the system.
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Post time: Sep-04-2023