What are the metal materials commonly used in the medical device industry Do they need heat treatment and how do they need to be heat treated Thanks for the help!!!!

In the production process of medical devices and medical equipment, a variety of materials are needed, such as ABS, PP, PE, stainless steel and carbon steel spray molding.

ABS (Acrylonitrile Butadiene Styrene) resin is a kind of high strength, good toughness, easy to process molding thermoplastic polymer materials, is acrylonitrile-styrene-butadiene **** polymer. Because of its high strength, corrosion resistance, high temperature resistance, so often used in the manufacture of plastic shells of instruments.ABS is a general-purpose thermoplastic engineering plastics developed in the 1940s, is a comprehensive mechanical properties are very good plastic varieties, not only has a good rigidity, hardness and processing fluidity, but also has a high toughness characteristics, can be injection molding, extrusion or thermoforming. Most of the automotive parts are processed by injection molding methods, the advantages of ABS resin is impact resistance, acoustic insulation, scratch resistance, better heat resistance, more beautiful than PP. ABS resin is easy to process, processing dimensional stability and surface gloss is good, easy to paint, coloring, but also can be sprayed with metal, plating, welding and bonding and other secondary processing properties.

PP (polypropylene) is a polymer, the monomer is propylene CH2 = CH-CH3, through the polymerization reaction to obtain polypropylene, the chemical formula can be expressed as (C3H6) n, the structure of the simple formula can be expressed as [-CH2-CH (CH3)

PE (polyethylene, Polyethylene) is the structure of the simplest polymer organic compounds, the world's most widely used polymer materials, polymerized from ethylene, according to the different density is divided into high-density polyethylene, medium-density polyethylene and low-density polyethylene.

PVC (Polyvinylchloride, Polyvinylchloride) is the main component of polyvinyl chloride polyhydroethylene, colorful, corrosion-resistant, strong and durable, due to the increase in the manufacturing process of plasticizers, anti-aging agents, and other toxic auxiliary materials to enhance its heat resistance, toughness, ductility, etc., so its products are generally not stored food and medicine.

Stainless steel (Stainless Steel, CR for short) refers to the air, steam, water and other weak corrosive media and acids, alkalis, salts and other chemical impregnating media corrosion-resistant steel, also known as stainless acid-resistant steel. In practice, the steel resistant to weak corrosive media is often referred to as stainless steel, while the steel resistant to chemical media corrosion is called acid-resistant steel. According to the composition can be divided into Cr-Mn-Ni (200 series), Cr-Ni system (300 series), Cr system (400 series) and precipitation hardening system (600 series). Commonly used in the production of medical device technology, 201 #, 304 # stainless steel.

Carbon steel mainly refers to the mass fraction of carbon less than 2.11% and does not contain deliberately added alloying elements of iron-carbon alloys, sometimes called plain carbon steel or carbon steel. In addition to carbon, carbon steel generally contains a small amount of silicon, manganese, sulfur and phosphorus.

Plastic spraying is a surface treatment method in which plastic powder is sprayed on parts. Electrostatic spraying process has the advantage of: no dilution, construction of the environment is not polluting, non-toxic to the human body; coating appearance of excellent quality, adhesion and mechanical strength, spraying construction curing time is short, the coating of corrosion and abrasion resistance capacity is much higher, no primer, construction is simple, low technical requirements of workers, the cost is lower than the spray paint process, some construction occasions have been explicitly proposed must be handled by the use of electrostatic spraying process, electrostatic Powder coating process will not appear in the paint spraying process common flow phenomenon.