What is high temperature plastic injection molding for medical device accessories


High-temperature plastic injection molding of medical e […]

High-temperature plastic injection molding of medical equipment parts is an engineering plastic that is used in medical equipment, medical equipment, medical consumables or other engineering fields that require plastics to still have high mechanical properties and chemical resistance under high-temperature working environments. However, some high-temperature plastics are used in When it comes to medical equipment, it is not because of its high temperature resistance. Sometimes it is lightweight, self-lubricating and wear-resistant. When medical consumables need high temperature or steam sterilization, high temperature resistant plastics such as PPSU LCP and PES should also be considered.

The mechanical working conditions of ordinary PP and nylon are generally 100℃, and the general working temperature of PC is below 140℃. According to the plastics of different manufacturers, there is a certain gap in temperature resistance, especially some modified ordinary plastics and raw materials. The gap is more obvious.

High temperature resistant engineering injection Plastic medical mould is a kind of plastic that can maintain its own relatively high mechanical properties under high temperature working environment due to its special structure. Most high temperature resistant plastics need high temperature injection molding during injection molding. This has higher temperature requirements for the heating system of the injection molding machine. In most injection molding machines, the barrel temperature of the default configuration is below 350 degrees. Below we briefly introduce some high-temperature resistant medical-grade plastics.

LCP has both fully aromatic polyester and copolyester structural design. It also has a meticulous linear polymer chain structure design, forming a product with better unidirectional mechanical properties. Good high temperature performance (heat distortion temperature is 121-355℃), good radiation resistance, hydrolysis resistance, weather resistance, chemical resistance, flame retardancy, low smoke generation, high stability, low moisture absorption, Very low linear expansion coefficient, high impact strength and rigidity (LCP is stronger than steel under the same weight, but the rigidity is only 15% of steel). LCP can tolerate chemicals such as acids, solvents and hydrocarbons, and has good barrier properties. LCP is used in the medical industry. Fixed compression plate LCP is a new type of fracture internal fixation technology based on dynamic compression plate and point contact plate. Medical-grade LCP plastic has the advantages of fixed reliability, low nail pull rate and fewer complications. The surgical effect is strong, internal fixation can start early functional training, can shorten the recovery period of patients after injury, and give full play to joint function.