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This is the free Material Data Center Datasheet of CELCON® M90UV - POM - Celanese

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Características de processamento/físicasValorUnidadeMétodo de ensaio
ISO Dados
Índice de fluidez volumétrico, MVR 8 cm³/10min ISO 1133
Temperatura 190 °C -
Carga 2.16 kg -
Propriedades mecânicasValorUnidadeMétodo de ensaio
ISO Dados
Módulo de tração 2600 MPa ISO 527
Tensão no escoamento 65 MPa ISO 527
Deformação no escoamento 10 % ISO 527
Res. impacto Charpy c/entalhe, +23°C 6.1 kJ/m² ISO 179/1eA
Propriedades térmicasValorUnidadeMétodo de ensaio
ISO Dados
Temperatura de fusão, 10°C/min 165 °C ISO 11357-1/-3
Temperatura de deflexão térmica, 1.80 MPa 101 °C ISO 75-1/-2
Coef. de expansão térmica linear, paralelo 110 E-6/K ISO 11359-1/-2
Coef. de expansão térmica linear, perpend. 120 E-6/K ISO 11359-1/-2
Outras propriedadesValorUnidadeMétodo de ensaio
Absorção de água 0.75 % Sim. to ISO 62
Absorção de umidade 0.2 % Sim. to ISO 62
Densidade 1410 kg/m³ ISO 1183
Recomendação de processamento Moldagem por injeçãoValorUnidadeMétodo de ensaio
Pré-secagem - temperatura 80 °C -
Pré-secagem - tempo 3 h -
Umidade do processamento ≤0.35 % -
Temperatura da massa 182 - 199 °C -
Temperatura do molde 82 - 93 °C -
Características
Processamento
Moldagem por injeção
Forma de entrega
Granulos
Aditivos
Desmoldante
Características especiais
Estável a luz, Estabilidade a raios U.V./Intempéries
Características
Copolímero
Disponibilidade regional
América do Norte, America Centra e do Sul
Outras informações
Moldagem por injeção
Drying is generally not required because Celcon® and Hostaform® acetal copolymers are not hydroscopic nor are they degraded by moisture during processing. Excessive moisture can lead to splay (silver streaking) in molded parts. For better uniformity in molding especially when using regrind or material that has been stored in containers open to the atmosphere, recommended drying conditions are 80 C (180 F) for 3hours. Desiccant hopper dryers are not required. Maximum water content = 0.35%
Standard reciprocating screw injection molding machines with a high compression screw (minimum 3:1 and preferably 4:1) and low back pressure (0.35 Mpa/50 PSI) are favored. Using a low compression screw (I.E. general purpose 2:1 compression ratio) can result in unmelted particles and poor melt homogeneity. Using a high back pressure to make up for a low compression ratio may lead to excessive shear heating and deterioration of the material.

Melt Temperature: Preferred range 182-199 C (360-390 F). Melt temperature should never exceed 230 C (450 F).

Mold Surface Temperature: Preferred range 82-93 C (180-200 F) especially with wall thickness less than 1.5 mm (0.060 in.). May require mold temperature as high as 120 C (250 F) to reproduce mold surface or to assure minimal molded in stress. Wall thickness greater than 3mm (1/8 in.) may use a cooler (65 C/150 F) mold surface temperature and wall thickness over 6mm (1/4 in.) may use a cold mold surface down to 25 C (80 F). In general, mold surface temperatures lower than 82 C (180 F) may hinder weld line formation and produce a hazy surface or a surface with flow lines, pits and other included defects that can hinder part performance.
Postprocessing conditioning and moisturizing are not required. It may be necessary to fixture large or complicated parts with varying wall thickness to prevent warpage while cooling to ambient temperature.
Disclaimer
Copyright Altair Engineering GmbH. Altair Engineering GmbH assumes no liability for the system to be free of errors. The user takes sole responsibility for the use of this data under the exclusion of every liability from Altair Engineering GmbH; this is especially valid for claims of compensation resulting from consequential damages. Altair explicitly points out that any decision about the application of materials must be double checked with the producer of this material. This includes all contents of this system. Copyright laws are applicable for the content of this system.
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