POM-C/H POM copolymer and POM homopolymer

Pom-c /H (black, white) : respectively represents POM copolymer and POM homopolymer, POM copolymer has low melting point, thermal stability, chemical resistance, flow characteristics, hydrolysis resistance, alkali resistance and thermal oxidation degradation, processability is better than homopolymer.

POM homopolymers have high crystallinity, creep, lower thermal expansion rate, wear resistance, mechanical strength, rigidity, thermal deformation temperature and so on. (At present, POM semi-finished products on the market generally use POM-C copolymerization)

Pom-h +PTFE (dark brown POM-H+TF is extrudated from dupont POM (DELRIN) raw material plus PTFE (Teflon) fiber. It retains most of the intrinsic strength of POM-H. Due to the addition of PTFE (Teflon) fiber and some performance changes, slightly softer, less rigid, more slippery than pure polyformaldehyde resin. Compared with pure POM plate, this material has better lubricating properties. Bearings made of POM-H+PTFE have low friction coefficient, wear resistance, and basically no peristalsis.

(1) POM is a crystalline plastic with a density of 1.42g/cm3. It has good rigidity and is commonly known as "match steel".

(2) It has excellent properties such as fatigue resistance, creep resistance, wear resistance, heat resistance, impact resistance, and small friction coefficient and good self-lubricity.

(3) POM is not easy to absorb moisture, water absorption rate is 0.22 ~ 0.25%, good dimensional stability in humid environment, its shrinkage rate is 2.1%(larger), the size of injection molding is difficult to control, thermal deformation temperature is 172℃, polyoxyformaldehyde has two kinds of polyoxyformaldehyde and copolyoxyformaldehyde, different performance (polyoxyformaldehyde temperature resistance is better).

Application of POM:

It can replace most non-ferrous metals, automobiles, machine tools, instrument internal parts, bearings, fasteners, gears, spring pieces, pipes, transport belt accessories, electric water cooker, pump shell, drain, faucet, etc.

Process features:

(1) POM can not be dried before processing, it is best to preheat (about 800℃) in the processing process, which is good for the stability of product size.

(2) POM processing temperature is very narrow (0 ~ 215℃), the residence time in the barrel is slightly longer or the temperature exceeds 220℃ will be decomposed, producing strong irritating formaldehyde gas.

(3) When POM material is injected, the holding pressure should be large (similar to the injection pressure) to reduce the pressure drop. Screw speed can not be too high, less residual;

(4) POM product shrinkage rate is large, easy to shrink or deformation. POM has a large specific heat, high mold temperature (800 ~ 100℃), and the product is very hot when demoulding, so it is necessary to prevent finger burns.

(5) POM should be formed and processed under the condition of "medium pressure, medium speed, low material temperature and high mold temperature", and precision products need to control mold temperature when forming

(6) High mechanical strength and rigidity

(7) The highest fatigue strength

(8) Good environmental resistance and organic solvent resistance

(9) Strong resistance to repeated impact, good electrical properties, good recovery, with its own lubricity, good wear resistance, excellent dimensional stability.

Physical properties table

Physical performance rating unit system test method

Density of 1.42 g/cm&sup 3; The ISO 1183

Melt rate 1.7g /10 min ISO 1133

Contraction rate - flow 1.8 to 2.2 % Internal Method

Mechanical performance rating unit system test method

Tensile modulus (23°C) 2900 MPa ISO 527-2

Tensile stress (yield, 23°C) 69.0 MPa ISO 527-2

Tensile strain (fracture, 23°C) 70 % ISO 527-2

Test method of unit system for impact performance rating

The notched impact strength of simply supported beam is 15 kJ/m² The ISO 179

Thermal performance rating unit system test method

Thermal deformation temperature

0.45 MPa, unannealed 163 °C ISO 75-2/B

1.8 MPa, unannealed 100 °C ISO 75-2/A

Flammability rating test method

UL Flame retardant rating UL 94

0.800 mm HB

1.50 mm HB

Injection rating unit system

Drying temperature 80.0 to 90.0 °C

The drying time was 3.0 to 4.0 hr

Processing (melt) temperature 190 to 210 °C

Mold temperature > 50.0 °C

Physical performance rating unit system test method [1]

Density 1.50g /cm3 ISO 1183

Shrinkage rate - flow rate 2.2 % ISO 294-4

Tip: Due to the large internal stress of POM plate, in order to prevent stress deformation, it is necessary to eliminate the internal stress before processing to prevent bending deformation of the plate.

Imported anti-static POM board, anti-static POM rod, anti-static voltage bar, anti-static polyformaldehyde plate. Anti-static POM board with polyformaldehyde as the substrate, adding carbon filling material, its impedance value is stable, in the field of application of anti-static materials show high performance characteristics: The anti-static value of all parts of the anti-static POM board is the same, the overall resistance value is 106-109Ω after machining or surface wear, the anti-static value has no change of organic solvent resistance, insoluble at room temperature, low temperature performance and good, the use temperature is -40-90℃ excellent resistance to friction and resistance to denaturation, high mechanical strength, high rigidity and hardness. Good sliding performance, no water absorption, high mechanical strength, excellent processing performance.

Color: Natural/black

The specifications of the POM plate size: 0.5 mm - 100 mmx1000 mmx510/610/2000 mm

Specification size of POM plate: 5-300mm

Color: Natural/black

Guangzhou Yayan Plastic Products Co., LTD. Spot supply: PEEK board/rod, PPS board/rod, PVDF board/rod, PTFE board/rod, PSU board/rod, PEI board/rod, PI board/rod, PAI board/rod, PPO board / bar, PBT board/bar, CPVC board/bar, UPE board/bar, PETP board/bar, PC board/bar, POM board/bar, ABS board/bar, PMMA board/bar, PP board/bar, PE board / bar, imported PU board/bar, German PES board/bar, domestic PVC board/bar, Swiss engineering PBI board/bar, German PA nylon series board/bar/piece, MC nylon series board. Insulation materials: Taiwan red, black electric board, cold stamping board, phenolic laminated cloth bar board, heat insulation board, epoxy glass fiber bar board, epoxy board (FR-4) asbestos board, etc. Anti-static products: anti-static POM board/bar, anti-static organic board, anti-static PC board. Anti static PVC board/bar, anti static nylon board/bar synthetic SLATE and so on.

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