材料 – City-Pla

Elevating the Essence of Manufacturing Excellence Worldwide from Japan and Thailand.. Mastery in Plastic Processing, Precision Machining, and Comprehensive Resin Transformation

Materials

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Engineering plastic

Material	Characteristics
MC NYLON	Excellent mechanical strength, most commonly used engineering plastic Good oil resistance Manufacturable in relatively large sizes due to liquid mixing process Relatively high water absorption compared to other engineering plastics, making it prone to expansion changes
POM	Low water absorption, good strength, and excellent fatigue resistance for a well-balanced material Good machinability, with reinforced annealed products having minimal distortion during processing Recommended for material selection due to its versatility
UHMW	Exhibits excellent slip and wear resistance at room temperature and low loads Good chemical resistance and suitable for components in contact with water, often used in food-related applications Low hardness, susceptible to scratches, high linear expansion coefficient, and significant shrinkage
PA	High tensile strength and rupture strength Durable and water-absorbent even at low and high temperatures Good thermal formability, and excellent in strength, oil resistance, and low-temperature characteristics
PC	Well-balanced mechanical properties, good dimensional accuracy, and excellent dimensional stability due to low water absorption High impact resistance and very good electrical characteristics Weak against steam and chemicals, prone to cracking Thin sheets can be free-cut
PBT	Tough with high rigidity, excellent heat aging resistance Low water absorption and excellent electrical characteristics Resistant to acids but weak against alkalis, susceptible to hydrolysis

Super engineering plastic

Material	Characteristics
PSF
PEEK	Excellent heat resistance, chemical resistance, and radiation resistance; the most commonly used super engineering plastic Almost no leachables, suitable for wafer carriers due to weldability
PAI	Superior mechanical properties and durability at high temperatures, low linear expansion coefficient leading to minimal shrinkage Flame retardant with a wide usage temperature range Swells with water absorption, leading to expansion with moisture or water exposure
PES
PPS	Excellent heat resistance, chemical resistance, and dimensional stability (virtually zero water absorption, low linear expansion coefficient) Weldable, used in items that don't require the performance of PEEK
PTFE	Superior heat resistance, chemical resistance, friction characteristics, electrical properties, and corrosion resistance; used in various fields such as food and semiconductor industries High linear expansion coefficient and significant shrinkage, leading to poor dimensional stability Excellent coefficient of friction (good slip characteristics) but susceptible to scratches
PCTFE	Fluororesin with excellent gas barrier properties, particularly low water vapor transmission rate among plastics Slightly lower heat and chemical resistance compared to PTFE and PFA, but excellent dimensional stability and mechanical properties at low temperatures
PEI	Maintains high strength at high temperatures, excellent electrical properties Moderate wear resistance, prone to chipping
PVDF	Superior mechanical properties among fluororesins Flame retardant, weather resistance, radiation resistance High heat resistance, excellent chemical resistance and compliance with food hygiene laws, widely used in welding tanks and various components
PFA	Maintains mechanical strength within a wide range of -200°C to 260°C, stable for use Higher hardness compared to PTFE, good scratch resistance, excellent dimensional stability
ECTFE
FEP
PI	Superior heat resistance compared to PAI. Excellent mechanical properties and durability at high temperatures, high purity makes it suitable for harsh conditions in semiconductor, LCD, aerospace, and space industries Highly priced material, second only to PBI

General purpose plastic

Material	Characteristics
PVC	Inexpensive among resins, excellent in adhesive, welding, and bending processability; good chemical resistance (especially acid resistance), low water absorption Used in semiconductor components, housings, etc. Low heat resistance; susceptible to deformation when left in a car during summer
PE	Excellent corrosion resistance and electrical insulation properties; general-purpose plastic Low water absorption; compliant with food hygiene laws; widely used in food machinery due to low cost Good surface slip properties, but low hardness leads to susceptibility to scratching
PET	Excellent mechanical properties and dimensional stability; used in high-precision products and food machinery components Two types: A-PET, G-PET; G-PET (transparent) allows bending and adhesive processing Weak to impact, prone to chipping
PP	Excellent corrosion resistance and electrical insulation properties; general-purpose plastic; harder than PE and relatively high heat resistance High chemical resistance; widely used in semiconductor-related components
PS
ABS	Inexpensive; superior surface hardness and impact resistance compared to PP and PE Easy secondary processing such as adhesion and plating; high demand for prototyping and modeling Slightly inferior chemical resistance, susceptible to solvents like thinner
PMMA	High transparency; clarity increases after polishing post-cutting; often used for decorative and prototype items Strong acid resistance, weak to other chemicals, prone to cracks; susceptible to cracking and other weaknesses

Thermoset plastic

Material	Characteristics
PF
EP