POM Formosa Plastics FORMOCON FM270

POM Formosa Plastics FORMOCON® FM270（Taiwan‑China）

POM Taiwan‑Plastics FM270 is high‑flow low‑mold‑deposit copolymer‑acetal(POM‑C) injection grade. Balanced mechanical performance, excellent dimensional‑stability, good wear‑resistance & self‑lubrication, optimized for thin‑wall and complex‑geometry molded‑parts台湾塑胶工...。

Main Applications

Automotive: fuel‑pump components, fuel‑cap, seat‑belt parts, handle‑bars, power‑window components. Electrical & electronic: gears, bearings & structural‑parts for washing‑machine, juicer‑timer, power‑tool accessories; connectors & housings. Precision machinery & hardware: high‑precision gears, bearings, cams, screws, handles, pipe‑fittings & hardware components requiring low‑friction & wear‑resistance. Consumer goods: zippers, buttons, snap‑fits, toys, sports‑equipment; also suitable for thin‑wall containers & bottles台湾塑胶工...。

Physical‑Mechanical‑Thermal‑Electrical Properties

表格

Property Category	Item	Test Standard	Value	Unit
Physical Properties	Density	ISO 1183 / ASTM D‑792	1.41	g/cm³
	Water absorption(23 ℃, 24 h)	ASTM D‑570 / ISO 62	0.22‑0.50	%
	MFR (190 ℃ / 2.16 kg)	ASTM D‑1238 / ISO 1133	27.0	g/10 min
	Molding shrinkage	—	1.8‑2.2	%
Mechanical Properties	Tensile yield strength	ASTM D‑638 / ISO 527‑2	60.8‑63	MPa
	Elongation at break	ASTM D‑638 / ISO 527‑2	30‑45	%
	Tensile modulus	ISO 527‑2	2700‑2800	MPa
	Flexural strength	ASTM D‑790 / ISO 178	88‑93.2	MPa
	Flexural modulus	ASTM D‑790 / ISO 178	2550	MPa
	Izod notched impact 23 ℃	ASTM D‑256	53‑64	J/m
	Charpy notched impact 23 ℃	ISO 179/1eA	5.3‑5.4	kJ/m²
	Rockwell hardness M‑scale	ASTM D‑785	80	—
Thermal Properties	HDT (1.8 MPa)	ASTM D‑648 / ISO 75‑2/A	98‑110	℃
	HDT (0.45 MPa)	ASTM D‑648	158	℃
	Vicat softening point	ASTM D‑1525	162	℃
	Melting point(DSC)	DSC	165	℃
	CLTE (flow direction)	ASTM D‑696 / ISO 11359‑2	8.5×10⁻⁵ ~1.1×10⁻⁵	cm/cm/℃
Electrical Properties	Volume resistivity(23 ℃)	ASTM D‑257 / IEC 60093	1×10¹⁴	Ω·cm
	Surface resistivity	ASTM D‑257 / IEC 60093	1×10¹⁶	Ω
	Dielectric strength	ASTM D‑149 / IEC 60243‑1	19‑24	kV/mm
Flammability	UL94	UL 94	HB	—

Injection‑Molding Parameters

表格

Process Stage	Parameter	Recommended Range	Unit	Remarks
Pre‑drying	Drying temperature	80‑90	℃	Drying recommended; target moisture＜0.15 %, avoid bubbles & silver‑streaks台湾塑胶工...。
	Drying time	2‑4	h
Barrel temperature	Rear zone	160‑180	℃	Narrow thermal‑processing window. Melt temperature ≤220 ℃, overheat causes formaldehyde decomposition。
	Middle zone	170‑200	℃
	Front zone	190‑210	℃
	Nozzle temperature	180‑210	℃	Close to / slightly lower than front‑zone temperature to prevent drooling。
	Melt temperature	180‑210	℃	Typical working range for copolymer POM‑C。
	Mold temperature	60‑90	℃	Higher mold‑temperature improves crystallization, gloss and reduces sink‑marks。
Injection parameters	Injection pressure	50‑100	MPa	Higher value for thin‑wall articles。
	Hold‑up pressure	30‑80	MPa	Hold‑time:5‑15 s for shrinkage compensation。
	Back pressure	0‑0.5	MPa	Keep low; high back‑pressure induces shear‑overheat degradation。
	Injection speed	Medium‑high, multi‑stage	—	Too‑slow: flow marks; too‑fast: jetting & shear heat。
	Screw speed	50‑120	rpm	Avoid excessive rotational speed to reduce shear heat。
	Barrel residence time	＜20	min	Max 7 min retention under 240 ℃。
Shutdown procedure	Short‑term stop	Cool barrel below 150	℃	Long‑term shutdown: fully purge barrel with PE / PP。
	Purge note	PE / PP	—	Must purge halogen‑containing polymers before POM processing to prevent violent chemical reaction。
Post‑treatment	Annealing(optional)	—	—	Relieve residual stress for high‑precision parts working under non‑ambient service condition。

Note: All data for reference only, subject to official TDS and COA。