POM Polyplastics TR‑20

POM Polyplastics TR‑20 is a polyoxymethylene copolymer filled with 15% talc. While retaining the fundamental good properties of POM, this special‑grade engineering plastic achieves remarkably improved rigidity, heat resistance and dimensional stability (low warpage). It effectively reduces molding shrinkage and warpage deformation.

Main Applications

Automotive Industry: Fuel pump components, fuel tank caps, seat‑belt parts, window regulator components, door‑lock system parts, outer rear‑view mirror components, and other interior functional parts requiring high rigidity and dimensional stability.

Office Equipment & Precision Machinery: Structural supports, gears, cams for printers and copiers; structural & functional parts requiring precise dimension retention and thermal‑deformation resistance for OA/AV devices such as Blu‑ray disc players.

Electrical & Electronics: Gears, bearings and structural components for home appliances including washing machines, refrigerators and electric shavers.

Industrial Parts & Consumer Goods: Window‑frame and louver components, toys, game‑console parts, as well as industrial gears, rollers, bearings, screws, nuts and pump‑body parts demanding high rigidity and dimensional stability.

Property Data

表格

Property Category	Test Item	Test Standard	Test Value	Unit
Physical Properties	Density	ISO 1183 / ASTM D‑792	1.53	g/cm³
	Water Absorption (23℃, 24 h)	ISO 62 / ASTM D‑570	0.50	%
	Melt Mass‑Flow Rate (MFR)	ISO 1133 (190℃, 2.16 kg)	9.0‑21.0	g/10 min
	Melt Volume‑Flow Rate (MVR)	ISO 1133 (190℃, 2.16 kg)	8.0‑16.0	cm³/10 min
Mechanical Properties	Tensile Strength	ISO 527‑2 / ASTM D‑638	56.0‑59.0	MPa
	Elongation at Break	ISO 527‑2 / ASTM D‑638	5.0	%
	Tensile Modulus	ISO 527‑2	4500	MPa
	Flexural Strength	ISO 178 / ASTM D‑790	96.0‑98.0	MPa
	Flexural Modulus	ISO 178 / ASTM D‑790	4100‑4110	MPa
	Charpy Notched Impact Strength (23℃)	ISO 179/1eA	3.0	kJ/m²
	Izod Notched Impact Strength (23℃)	ASTM D‑256	34	J/m
	Izod Un‑notched Impact Strength (23℃)	ASTM D‑256	290	J/m
	Rockwell Hardness (M‑scale)	ISO 2039‑2 / ASTM D‑785	75	‑
Thermal Properties	Heat‑Deflection Temperature (1.8 MPa)	ISO 75‑2/A (unannealed)	125	°C
	Heat‑Deflection Temperature (1.82 MPa)	ASTM D‑648	149	°C
	Coefficient of Linear Thermal Expansion (23‑55°C)	Enterprise Method / ISO 11359‑2	8.0 (isotropic)	×10⁻⁵/°C (cm/cm/°C)
Electrical Properties	Volume Resistivity	IEC 60093 / ASTM D‑257	2.0 × 10¹⁴	Ω·cm
	Surface Resistivity	IEC 60093 / ASTM D‑257	9.0 × 10¹⁵	Ω
	Dielectric Strength (3 mm)	IEC 60243‑1 / ASTM D‑149	19.7‑21	kV/mm
Flammability	UL 94 Rating	UL 94	HB	‑
Others	UL File No.	‑	E45034	‑
	ISO Material Designation	ISO 11469	>POM‑TD15<	‑

Injection Molding Parameters

表格

Processing Stage	Process Parameter	Recommended Value / Range	Unit	Remarks & Notes
Pre‑treatment	Drying Temperature	80‑90	°C	Thorough drying is required to avoid bubbles and silver streaks; desiccant dryer is recommended.
	Drying Time	3.0‑4.0	hr
	Target Moisture Content	< 0.10	%
Barrel Temperature	Rear Zone	180‑200	°C	POM has a narrow processing window. Do not exceed 220°C; otherwise decomposition and irritating formaldehyde gas may occur.
	Middle Zone	180‑195	°C
	Front Zone	185‑210	°C
	Nozzle Temperature	180‑210	°C	Slightly lower than or close to front‑zone temperature to prevent drooling.
	Melt Temperature	190‑210	°C
Mold Temperature		60‑80	°C	Higher mold temperature improves crystallization completeness, dimensional stability, surface gloss and reduces sink marks.
Molding Settings	Injection Pressure	49‑98	MPa	Adjust according to part geometry and wall thickness; increase moderately for difficult filling.
	Holding Pressure	50‑150	MPa	High holding pressure is required to minimize pressure drop and prevent sinkage; sufficient holding time shall be set.
	Back Pressure	0.5‑3.0	MPa	Keep back pressure low; excessive back pressure may cause shear‑induced thermal degradation.
	Injection Speed	Medium‑to‑high	‑	Suggested strategy: medium pressure, medium speed, low melt temperature, relatively high mold temperature. Avoid excessive shear heat from too‑fast injection.
	Screw Speed	100‑150	rpm	Do not run screw at high speed; maintain small cushion to prevent shear‑related material decomposition.
Post‑Treatment			‑	Generally unnecessary. For high‑precision parts, annealing may be applied to relieve internal stress.

Note: All data above is for reference only!