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 ¡ã 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 ¡ã 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 |
Property |
Acetal Copolymer |
Delrin ® |
Delrin ® |
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 |
|
Coefficient of Linear Thermal Expansion |
|
|
|
D648 |
Heat Deflection Temp (¡ãF / ¡ãC) at 264 psi |
|
|
|
D3418 |
Melting Point Temp (¡ãF / ¡ãC) |
335 / 168 |
347 / 175 |
347 / 175 |
- |
Max Operating Temp (¡ãF / ¡ãC) |
180 / 82 |
180 / 82 |
180 / 82 |
|
Thermal Conductivity (BTU-in/ft2-hr-¡ãF) |
1.6 |
2.5 |
|
UL94 |
Flammability Rating |
HB |
HB |
HB |
D149 |
Dielectric Strength (V/mil) short |
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 |
Quality:
Our company is a professional production of Plastic raw material and Metal for many years, our products have exported to Germany, Spain, UK, USA, Australia, Middle East, and so on other countries, and we have got very good feedback from our customers.so you can trust us.
And we are the manufactory, so you don’t need to doubt the quality.
Payment method: for example T/T, D/A, L/C, Westerm Union,other
1)We will ship the goods within 5days after get your payments.If you want to cancel or change order, please tell me within 24hours after you finish the payment…So we both can make the best of the bad bargain.
2)We will ship the goods that you order from us by HKEMS, DHL, UPS, TNT and EUB.We will decided to choose which courier depend on different countries.To find the best way to delivery the goods for you.
3)As usual you can get the goods with in 4-7days.If the goods were lost or not received for other reasons, please contact us immediately.
FAQ
Q1: Can i get some samples
A: Yes, we can supply the free sample, but the shipping cost be paid by our customers.
Q2: How to start orders or make payments
A: Proforma invoice will be sent first after confirmation of order, enclosed our bank information. Payment by T/T, Western Union,BTC,MoneyGram
Q3: How to confirm the Product Quality before placing orders
A:You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the
samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.
Q4:What’s your MOQ
A:Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.
Q5: How about delivery lead time
A:Delivery lead time: About 3-5 days after payment confirmed. (Chinese holiday not included)
Quality First, Safety Guaranteed