Dongguan Jichang plastic materials company tell you: poly difference acetal copolymer of? The first point to say is that ingredients: POM from pure formaldehyde polymerization catalyzed BF3 ether complexes made by the acetal copolymer of trioxane and dioxolane ring-opening polymerization, to obtain a second, density: homo POM density of 1.43g / cm3, while POM copolymer was 1.41g / cm3; there is a degree of crystallinity: homo POM was 75% to 85% 70% 75 POM copolymer melting point is a difference, however? less: poly POM is 175 ℃, copolymer of 160 ℃. The main differences in performance: homopolymers material has a very good extension strength, fatigue strength, mechanical strength than the copolymers of 10% to 20% formaldehyde about high crystallinity slightly higher but not easy to process, the copolymer material has good thermal stability, chemical stability and ease of processing of course, have the same place, regardless of homopolymer material or copolymer materials are crystalline materials and are not easily absorb water. Stability: POM stable than the acetal copolymer, POM generally direct polymerization of formaldehyde, and formaldehyde acetal copolymer generally need to first make a crude oligomer intermediate product, and then polymerized production: the world only the United States DuPont POM and Asahi Kasei to produce homo (monomeric) formaldehyde, so the price is relatively high! Other Polyplastics POM, Mitsubishi P, South Korea project POM, Ticona POM, Horst, BASF POM, POM POM plastic injection molding plastic materials, LG, and so can only produce acetal copolymer (of course domestic Yuntianhua POM, blue Star, day base, Guangdong POM injection materials factory outlets, Long-steel too) high formaldehyde homopolymerization It is also very important. . . . POM strength, stiffness, Japan Polyplastics POM plastic materials Guangdong agent, flexible, anti-friction wear resistance. Excellent mechanical properties, specific strength of up to 50.5MPa, specific stiffness up to 2650MPa, very close to the metal. Mechanical properties of POM with small changes in temperature, co-POM POM than homo change slightly larger. POM high impact strength, but the impact is less than conventional ABS and PC; POM notch sensitive, can drop as much as 90% of the notched impact strength. POM fatigue strength is very prominent, POM, after 10 alternating loads, fatigue strength up to 35MPa, while PA and PC only 28MPa. POM and PA is similar to creep resistance, at 20 ℃, 21MPa, when 3000h only 2.3%, and little affected by temperature. POM friction coefficient of small, good wear resistance (POM> PA66> PA6> ABS> HPVC> PS> PC), the limit PV value is large, self-lubricating. POM products on time grinding, easy to produce a noise similar to screaming high loads. Guangdong POM POM plastic materials manufacturers _ _ Jichang plastic provided by the Dongguan City, often Jichang plastic materials. Dongguan Chang-ping Jichang plastic materials (jichang668.1688.com/)(www.POM100.COM) strong, credible, in Dongguan, Guangdong and other engineering plastics industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jichang plastic into the brilliant and you work for a better future!