POM copolymer甲醛 (POM is a thermosetting plastic of high-content polyoxymethylene, also an important rubber-plastic product. It has low density, grain size, melting point, and tensile strength, but good heat resistance, does not easily dissolve, and has a wide production and manufacturing temperature range (about 50℃), and good stability against strong oxidizing agents. It is a rubber-plastic product with excellent comprehensive properties, industrial equipment, and analytical chemistry characteristics, particularly with excellent wear resistance. Also known as Saecon or Duogang, it is a practical rubber-plastic product. Suitable for manufacturing parts with wear and abrasion resistance, transmission parts, car dashboard components, etc. It is a type of anticorrosive paint, also known as polyester chip epoxy resin, POM plastic, Sae steel material, etc.; it is a milky white or black gray recycled granule with high wear resistance, high stiffness, and high wear resistance. Generally includes homopolymer and prepolymer two types. Homopolymer POM, with a density of about 1.4 and a melting point of about 170~185℃; it has excellent flexural rigidity, and the compressive strength can reach 68.9Mpa, the company's quality compressive strength is higher than zinc and red copper, close to stainless steel plate; good wear resistance, low friction and water absorption, but poor heat resistance and resistance to alkalinity.)
Properties and Performance of Polycarbonate
In the existing engineering plastics, polyformaldehyde is a variety with quite good comprehensive properties.
Excellent mechanical properties of polyoxymethylene
(1) Polycarbonate boasts high mechanical strength and minimal strength reduction at high temperatures. It exhibits high tensile, compressive, and flexural strengths, with an elastic modulus of 26,700 kg/cm², which is 40% higher than that of nylon, 60% higher than that of ABS, and 25% higher than that of polycarbonate. This value remains unchanged when the temperature rises to 40°C, thus offering excellent hardness and rigidity.
(2) Polyoxymethylene boasts excellent impact resistance and can withstand multiple repetitive impacts.
(3) POM exhibits excellent creep resistance. Under long-term load, the deformation value is low (meaning the load causing deformation is high), and it has high resilience. For instance, under a tensile force of 200 kg/cm², the sample elongates by 1.13% after 42 hours, 0.45% upon the removal of the tensile force, and only 0.07% after 30 hours.
(4) Polyoxymethylene boasts excellent fatigue resistance, capable of withstanding tens of thousands of cycles of load without significant strength reduction.

Polymethyl methacrylate can also be reinforced with glass fiber. When the glass fiber content is 30%, its tensile strength can be increased by 20% and its water absorption rate can be reduced by 50%.

Polyoxymethylene; Excellent electrical properties
Not affected by temperature (due to a low saturation water absorbency of only 0.2~0.25%).

Polymethyl methacrylate (POM), also known as Polyoxymethylene, is a polymer (high molecular weight POM) with a general chain length of eight to one hundred units. Long chains are commonly used in heat-resistant plastics, also known as POM plastics (POE, produced by DuPont's Derlin). Due to its rapid decomposition and slight odor, it can be used for smoke disinfection and also for preparing pure formaldehyde (can be used to make formalin). It slowly generates at low temperatures, precipitating out as a white, insoluble substance.
In addition to poor resistance to acidic substances, POM boasts good tolerance to most chemicals, thus widely used in components requiring chemical resistance, such as automotive oil pumps.
From a molecular structure perspective, the chemical resistance of copolymer formaldehyde should be similar to homopolymer formaldehyde, but there is no data to support that...