Types of high molecular materials in instrument manufacturing and how to choose them according to functional requirementsг┐

　　Types of high molecular materialsin instrument manufacturing and how to choose them according to functional requirements

High molecular materials, also known as polymer materials, are an important part of the chemical industry. They are widely used in various fields of instrument manufacturing, such as medical equipment, electronic equipment, aerospace equipment, automotive accessories, and so on. High molecular materials can be divided into different types such as thermoplastic plastics, thermosetting plastics, elastomers, and composite materials according to their molecular structure, properties, and applications. In instrument manufacturing, different high molecular materials need to be selected according to the different functional requirements.

　　1. Thermoplastic plastics

Thermoplastic materials refer to materials that can soften and melt when heated at a certain temperature and can solidify into shape after cooling. They have good moldability, processability, as well as good heat resistance, cold resistance, and chemical corrosion resistance. Common thermoplastic materials include polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polyformaldehyde (POM), and polycarbonate (PC). In instrument manufacturing, thermoplastic materials are often used to manufacture the shells of electronic instruments, medical equipment, and automotive interior parts. For example, PVC material is often used to manufacture the shells of electronic instruments due to its good insulation properties; PS material is often used to manufacture the shells of medical equipment due to its high transparency; PC material is often used to manufacture automotive interior parts due to its good heat resistance.

Two, Thermosetting Plastics

Thermosetting plastics refer to materials that undergo irreversible cross-linking reactions and form a three-dimensional network structure when heated, and do not soften after cooling. They have good heat resistance, cold resistance, chemical corrosion resistance, as well as good mechanical strength and hardness. Common thermosetting plastics include phenolic resins, epoxy resins, and polyurethane resins. In instrument manufacturing, thermosetting plastics are often used to manufacture instrument components that require high temperature resistance, corrosion resistance, and high strength. For example, epoxy resins are often used to manufacture insulating components of electronic instruments due to their excellent heat resistance and chemical corrosion resistance; phenolic resins are often used to manufacture the shells of medical equipment due to their excellent mechanical strength and hardness.

Three, Elastomers

Elastomers refer to materials with high elasticity, which can deform under the action of external forces but can recover to their original shape when the external force disappears. Common elastomers include silicone rubber, polyurethane rubber, and natural rubber. In instrument manufacturing, elastomers are often used to manufacture instrument components that require high elasticity. For example, silicone rubber is often used to manufacture the shells of medical equipment due to its good biocompatibility; polyurethane rubber is often used to manufacture automotive interior parts due to its good wear resistance and aging resistance.

Four, Composite Materials

Composite materials refer to materials composed of two or more different materials, which have excellent mechanical properties, heat resistance, and chemical corrosion resistance. Common composite materials include glass fiber reinforced plastics, carbon fiber reinforced plastics, and aramid fiber reinforced plastics. In instrument manufacturing, composite materials are often used to manufacture instrument components that require high strength, high heat resistance, and high chemical corrosion resistance. For example, glass fiber reinforced plastics are often used to manufacture the shells of electronic instruments due to their excellent mechanical properties; carbon fiber reinforced plastics are often used to manufacture the shells of medical equipment due to their excellent heat resistance and chemical corrosion resistance.

When selecting high polymer materials, comprehensive considerations need to be made based on factors such as the functional requirements of the instrument, the operating environment, and cost. For example, if it is necessary to manufacture an instrument component that requires high temperature resistance and chemical corrosion resistance, thermosetting plastics or composite materials can be chosen; if it is necessary to manufacture an instrument component that requires high elasticity, elastomers can be chosen. In summary, selecting the appropriate high polymer material is the key to ensuring the performance of the instrument and extending its service life in instrument manufacturing.