POM DuPont Delrin 100P

POM DuPont Delrin® 100P

POM DuPont Delrin® 100P is high‑viscosity homopolymer‑acetal (POM‑H). It delivers high rigidity, high strength and inherent high‑toughness without toughening modifier, good dimensional‑stability, broad service‑temperature window, excellent wear‑resistance and fair chemical‑resistanceDuPont.

Main Applications

Automotive: high‑stress components, fuel‑pump assemblies, seat‑belt parts, handle‑parts, power‑window components, pipes and sliders. Electrical & electronic: gears, bearings and structural parts for washing‑machine / juicer assemblies, keyboard, timer units, audio‑video equipment. Precision‑machinery & industrial components: high‑load gears, bearings, cams, screws, levers, pulleys, sprockets, pipe‑valve parts, fasteners and engineering fittings. Consumer goods: zippers, toys, sports‑equipment, lighters; extruded sheets, strips and tubeselectronic...。

Physical‑Mechanical‑Thermal‑Electrical Properties

Note: MFR discrepancy: ASTM D‑1238 9.0 g/10min vs ISO 1133 2.3 g/10min, comes from different test procedure of two standards; real ISO MFR ≈2.3 g/10min, belongs to high‑viscosity grade。

表格

Property Category	Item	Test Standard	ASTM	ISO	Unit
Physical Properties	Density	ASTM D‑792 / ISO 1183	1.42	1.42	g/cm³
	Water absorption (24 h immersion)	ASTM D‑570 / ISO 62	0.25	0.90(sat)	%
	Water absorption (50 % RH equilibrium)	ASTM D‑570 / ISO 62	0.22	0.20	%
	MFR (190 ℃ / 2.16 kg)	ASTM D‑1238 / ISO 1133	9.0	2.3	g/10 min
	Molding shrinkage (flow)	— / ISO 294‑4	2.2‑2.4	2.1	%
	Molding shrinkage (transverse)	— / ISO 294‑4	—	1.9	%
Mechanical Properties	Tensile yield strength @23℃	ASTM D‑638 / ISO 527‑2	69	71.0	MPa
	Elongation at break	ASTM D‑638 / ISO 527‑2	65	70	%
	Tensile modulus	ASTM D‑638 / ISO 527‑2	3220	3100	MPa
	Flexural strength	ASTM D‑790 / ISO 178	98	76.0(3.5% strain)	MPa
	Flexural modulus	ASTM D‑790 / ISO 178	2840	2700	MPa
	Izod notched impact @23℃	ASTM D‑256 / ISO 180/1A	137	14	J/m ; kJ/m²
	Izod un‑notched impact	ASTM D‑256 / ISO 179/1eU	＞5300	No break	J/m
	Compressive strength(10 % strain)	ASTM D‑695	123	—	MPa
	Rockwell hardness M‑scale	ASTM D‑785 / ISO 2039‑2	94	92	—
	Rockwell hardness R‑scale	ASTM D‑785	120	120	—
Thermal Properties	HDT (1.8 MPa)	ASTM D‑648 / ISO 75‑2/A	136	98.0	℃
	HDT (0.45 MPa)	ASTM D‑648 / ISO 75‑2/B	172	165	℃
	Melting point	ASTM D‑2133 / ISO 11357‑3	175	178	℃
	CLTE (flow direction)	ASTM D‑696 / ISO 11359‑2	12.2	0.00011	10⁻⁵ m/m·℃
Electrical Properties	Volume resistivity	ASTM D‑257 / IEC 60093	1×10¹⁵	>1.0E+15	Ω·cm
	Dielectric strength(2.3 mm)	ASTM D‑149	19.7	—	kV/mm
	Dielectric constant (1 MHz)	ASTM D‑150 / IEC 60250	3.7	3.70	—
	Dissipation factor (1 MHz)	ASTM D‑150 / IEC 60250	0.005	0.0050	—
Flammability	UL94	UL 94	HB	HB	—

Injection‑Molding Parameters

表格

Process Stage	Parameter	Recommended Range	Unit	Remarks
Pre‑drying	Drying requirement	Normally not required	—	Pre‑heat ~80 ℃ improves dimensional stability. Dry at 80 ℃ for 2‑4 h if moisture＞0.20 %.
Barrel temperature	Barrel overall	170‑200	℃	Narrow processing window. Never exceed 220 ℃, formaldehyde will decompose.
	Melt temperature	190‑210 (optimum 210‑215)	℃	High‑viscosity grade; avoid over‑heating.
	Mold temperature	80‑100	℃	High mold‑temperature improves crystallization, gloss and reduces sink‑marks.
Injection parameters	Injection pressure	50‑100	MPa	Adjust for wall‑thickness.
	Hold‑up pressure	Close to injection pressure	—	Sufficient hold‑pressure to compensate shrinkage.
	Injection speed	Medium	—	Strategy: medium pressure, medium speed, low melt temperature, high mold temperature.
	Screw speed	Keep low	—	High screw speed brings excessive shear heat; small cushion required.
	Barrel residence time	As short as possible	—	Long residence causes degradation.
Shutdown procedure	Long‑term shutdown	Purge barrel completely	—	Use PE / PP for purging.

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