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POM
 
Brand Name:BENJINXIN
Payment Terms: L/C, T/T, Western Union, Paypal
 
Product Description
 
 

Polyoxymethylene is a linear polymer with no side chains, high density, and high crystallinity. According to the chemical structure in the molecular chain, it can be divided into two types: homopolyformaldehyde and acetal copolymer. The important difference between the two is that the homopolyformaldehyde has high density, crystallinity and melting point, but the thermal
stability is poor, the processing temperature range is narrow (about 10 ° C), the acid-base stability is slightly lower, and the copolymerized formaldehyde density, crystallinity, The melting point and strength are low, but the thermal stability is good, it is not easy to decompose, the processing temperature range is wide (about 50 ° C), and the acid-base stability is good. It is an engineering plastic with excellent comprehensive performance. Has good physical, mechanical and chemical properties, especially with excellent friction resistance. Commonly known as Saigang or Steel, it is the third largest general plastic. Suitable for making wear-resistant parts, transmission parts, and parts such as chemicals and instruments.

 

1) Excellent mechanical strength;
2)High hardness strength;
3)High wear resistance;
4)Self-lubrication;
5)Higher modulus;
6)Chemical resistance and etc.

 

Application :
1. AV equipment such as VCRs, CD/laser disk/MD players, radio cassettes, headphone stereos;
2. OA equipment such as printers, keyboards, and CD-ROM drives;
3. Home electrical appliances such as washing machines and dryers
4. Auto parts such as seat belt mechanical components, outer door mirrors, door mirrors, and engine room components;

5. Precision components used in such products as cameras and watches, construction materials, toys such asgame machines, and stationer


ASTM or UL
test

Property

Acetal Copolymer

Delrin ®
Homopolymer

Delrin ®
AF PTFE-filled

D792

Density (g/cm3)

1.41

1.41

1.50

D570

Water Absorption, 24 hrs (%)

0.2

0.2

0.2

D638

Tensile Strength (psi)

9,500

11,000

8,000

D638

Tensile Modulus (psi)

400,000

450,000

435,000

D638

Tensile Elongation at Break (%)

30

30

15

D790

Flexural Strength (psi)

12,000

13,000

12,000

D790

Flexural Modulus (psi)

400,000

450,000

435,000

D695

Compressive Strength (psi)

15,000

16,000

16,000

D695

Compressive Modulus (psi)

400,000

450,000

350,000

D785

Hardness, Rockwell

M88 / R120

M89 / R122

M85 / R115

D256

IZOD Impact Notched (ft-lb/in)

1.0

1.0

0.7


D696

Coefficient of Linear Thermal Expansion
(x 10-5 in./in./°F)


5.40


4.70


5.00

D648

Heat Deflection Temp (°F / °C) at 264 psi


220 / 104


250 / 121


244 / 118

D3418

Melting Point Temp (°F / °C)

335 / 168

347 / 175

347 / 175

-

Max Operating Temp (°F / °C)

180 / 82

180 / 82

180 / 82


C177

Thermal Conductivity (BTU-in/ft2-hr-°F)
(x 10-4 cal/cm-sec-°C)

1.6
5.5

2.5
8.6


-

UL94

Flammability Rating

HB

HB

HB

D149

Dielectric Strength (V/mil) short
time, 1/8" thick

420

450

400

D150

Dielectric Constant at 1 MHz

3.8

3.7

3.1

D150

Dissipation Factor at 1 MHz

0.005

0.005

0.010

D257

Volume Resistivity (ohm-cm) at 50%RH

1015

1015

3.0 x 1016

 

last | POM

 
 
 
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PP, PE(LLDPE.LDPE.HDPE) , PS(GPPS.HIPS.EPS), PA, PC
AS, ABS, EVA,PET, PBT, POM, PVC
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