Wholesale Trending Products China Xhnotion Cartridge Non Return Valve Back Flow 32mm Plastic Double Check Valve factory and suppliers

Trending Products China Xhnotion Cartridge Non Return Valve Back Flow 32mm Plastic Double Check Valve

Short Description:

Item: POM Rod

Type: Extruded

Material: Polyformaldehyde

Color: White, black or custom

Diameter: 6mm to 250mm

Length: 1000mm or custom

Dimension Tolerance: +0%~3%

Package: Wooden pallet, wooden case or custom

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Product Description
Polyoxymethylene, commonly known as POM, it is a thermoplastic engineering plastics with high melting point and high crystallinity, a yellowish or white crystalline polymer with smooth and dense surface. According to the chemical structure of molecular chain, it can be divided into polyformaldehyde copolymer and polyformaldehyde homopolymer.
Comparing the properties of polyformaldehyde copolymer with polyformaldehyde homopolymer, some properties of copolymer are superior to homopolymer such as low melting point, thermal stability, chemical resistance, liquidity, hydrolysis resistance, acid and alkali resistance, superior process ability. However, some properties of homopolymer are also better than copolymer including high crystallinity, creep resistance, lower thermal expansion, abrasion resistance, good mechanical strength, high rigidity and so on.

JING GU PRODUCT PHYSICAL PROPERTIES
Property	Items	Test method	Unit	JING GU POM
Mechanical property	Tensile strength	ISO 527-1、2	Mpa	57
	Bending strength	ISO 178	Mpa	76
	Bending tensile stress	ISO 527	Mpa	68/-
	Stretching strain at break	ISO 527	%	35
	Tensile modules of elasticity	ISO 527	Mpa	3100
	Compressive stress under 1% and 2% normal strain	ISO 604	Mpa	19/35
	Pendulum impact test	ISO 179/1eA	kj/m²	8.6
	Rockwell hardness		HR	L97
Physical property	Density	ISO 1183	g/cm³	1.41
	Water absorption (23℃ water soak for 24 hours)	ISO 62	%	0.22
	Coefficients of linear thermal expansion (23-100℃ average value)		m/(m.k)	110×10^-5
	Flammability (UL)	UL94		HB
Heat resistance	Melting point		℃	165
	Temperature resistance (continuous)		℃	105
	Temperature resistance (short time)		℃	140
Insulating property	Dielectric strength	ISO 60243	kv/mm	20
	Volume resistance	ISO 60093	Ω·cm	1O¹⁴
	Surface resistance	ISO 60093	Ω	1O¹⁶
	Relative permittivity -100HZ/1MHZ	ISO 60250		3.8/3.8
Chemical property	Acid resistance			-
	Alkali resistance			+
	Carbonation resistance			+
	Aromatic compounds resistance			+
	Ketone resistance			+
Other	Adhesion			+
	Friction coefficient			0.32
	Food contact			+
Remark	1.Above data is only for reference.It may vary according to different processing method and sample. 2.These data can’t be simply transferred to the finished parts.The applicability of materials for specific applications should be tested by the processor and user. 3.These technical parameters are used as a help.They do not represent a promise of performance. 4.Above specification “+” represents resistant, “-” represents resistless, “0″ represents it depends.

Properties
1. Strong mechanical strength, high rigidity and hardness
2. Good sliding performance, abrasion resistance and creep resistance
3. Good dimensional stability
4. Physiological inertia and suitable to contact with food
5. Good machinability
6. Low impact strength
7. Poor acid resistance and weather resistance
Application
Widely used for sliding and rotating machinery, precision components, gears and bearings in automotive, electronics, medical care, machinery and sports apparatus.