Kaifeng Longyu Chemical Co., Ltd. has an annual production capacity of 40,000 tons of polyoxymethylene

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This post was last edited by hnccgq on 2010-3-22 at 14:45. The business scope of Kaifeng Longyu Chemical Co., Ltd. includes the production and sale of polyoxymethylene particles of various grades and related products, as well as formaldehyde, trioxymethane, dioxolane, and nucleating agents. The business operation period is 30 years. The polyoxymethylene production process developed by Kaifeng Longyu Chemical Co., Ltd. features low raw material consumption and energy usage, continuous production, a high degree of automation, stable product quality, great flexibility in adjusting product grades, and low pollutant emissions, thus meeting the requirements for environmental protection and clean production. The main products are: POM90, POM270. Polyoxymethylene product grades, specifications, properties, units, product specifications, and testing methods: MC25, MC90, MC130, MC270, MC450. ASTM standards are used for testing. Melting index: g/10min – 2.5±1, 9±1, 13±1, 27±3, 45±5. D1238 test for hardness: on a M scale – 75, 75, 80, 80, 80. D785 test for flexural strength: kgf/cm2 – 850, 850, 850, 850, 850. D790 test for modulus of elasticity: kgf/cm2 – 24000, 27000, 27000, 27000, 27000. D790 test for tensile strength: kgf/cm2 – 610, 620, 610, 620, 620. D638 test for elongation: % – 45, 45, 45, 40, 40. D638 test for impact strength: Kgf.cm/cm – 7.5, 6.5, 6.0, 5.0, 4.0. D256 test for water absorption: % – 0.22, 0.22, 0.22, 0.22, 0.22. D570 test for shrinkage upon molding: % – 1.8-2.2, 1.8-2.2, 1.8-2.2, 1.8-2.2, 1.8-2.2. Colority b-value: ≤2.0, ≤1.5, ≤1.5, ≤1.5, ≤1.5. Thermal stability: %/min – ≤0.03, ≤0.03, ≤0.03, ≤0.03, ≤0.03