POM Polyplastics DURACON® M270‑44

POM Polyplastics DURACON® M270‑44（Taiwan‑China）

POM 台湾宝理 M270‑44，高流动快周期共聚 POM‑C，优异流动性、尺寸稳定、耐化学品，适配薄壁、复杂结构制件Polyplasti...。

Main Applications

Electrical & electronic: gears, bearings and structural parts for washing‑machines, juicer timers, power‑tool accessories. Automotive: handle‑bars, power‑window components, fuel‑cap and other auto‑parts. Precision machinery: high‑precision gears, bearings, cams, screws, handles requiring low‑friction & wear‑resistance. Consumer & industrial goods: toys, sports‑equipment, building‑materials, lamp‑components。

Physical‑Mechanical‑Thermal‑Electrical Properties

表格

Property Category	Item	Test Standard	Value	Unit
Physical Properties	Density	ISO 1183	1.41	g/cm³
	Water absorption(23 ℃, 24 h)	ISO 62	0.50	%
	MFR (190 ℃ / 2.16 kg)	ISO 1133	27.0	g/10 min
	MVR (190 ℃ / 2.16 kg)	ISO 1133	23.0	cm³/10 min
	Molding shrinkage	ISO 294‑4	1.7‑1.9	%
Mechanical Properties	Tensile yield strength	ISO 527‑1,2	63	MPa
	Elongation at break	ISO 527‑1,2	30	%
	Tensile modulus	ISO 527‑1,2	2800	MPa
	Flexural strength	ISO 178	88	MPa
	Flexural modulus	ISO 178	2550	MPa
	Charpy notched impact 23 ℃	ISO 179/1eA	5.3	kJ/m²
Thermal Properties	HDT (1.8 MPa)	ISO 75‑1,2	100	℃
	CLTE (23‑55 ℃, flow / cross)	ISO 11359‑2	11×10⁻⁵	/℃
	Melting point(DSC)	ISO 11357	165	℃
Electrical Properties	Volume resistivity	IEC 60093	1×10¹⁴	Ω·cm
	Surface resistivity	IEC 60093	1×10¹⁶	Ω
	Dielectric strength(3 mm)	IEC 60243‑1	19	kV/mm
Flammability	UL94	UL 94	HB	—

Injection‑Molding Parameters

表格

Process Stage	Parameter	Recommended Range	Unit	Remarks
Pre‑drying	Drying temperature	~80(optional)	℃	Drying optional; pre‑heating improves dimensional‑stability。
	Drying time	2‑3	h	Suggested for damp raw‑material。
Barrel temperature	Rear‑to‑front zone	180‑200	℃	Narrow processing‑window; max melt ≤215 ℃, strictly <220 ℃, over‑heat releases formaldehyde gas。
	Nozzle temperature	Slightly lower than barrel	℃	Prevent drooling。
	Melt temperature	185‑200	℃	Measured by air‑shot method。
	Mold temperature	75‑120(target 80‑100)	℃	Higher mold‑temp improves crystallization, gloss & dimensional‑stability。
Injection parameters	Injection pressure	40‑130	MPa	Higher for thin‑wall, lower for thick‑wall。
	Hold‑up pressure	Close to injection‑pressure	MPa	Relatively high hold‑pressure to compensate pressure‑drop & shrinkage。
	Screw speed	Low‑medium	rpm	Avoid high‑speed screw; minimize cushion residual。
Molding suggestion	Processing window	Medium‑pressure, medium‑speed, moderate‑low melt‑temp, relatively high mold‑temp	—	Recommended processing condition。
	Barrel residence time	＜20	min	Avoid long‑term high‑temperature retention。
Shutdown procedure	Short‑term stop	Cool barrel below 150	℃	Long‑term shutdown purge with PE / PP。

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