Dies ist das kostenlose Material Data Center Datenblatt für Ultraform® H4320 AT R01 - POM - BASF

Hochmolekulare Type zur Herstellung von Halbzeug durch Extrusion. Speziell dickwandiges Halbzeug kann mit hoher Ausstoßgeschwindigkeit extrudiert werden. Das Produkt zeichnet sich weiterhin durch hohe thermische Stabilität aus.

Abgekürzte Bezeichnung gemäß ISO 1043-1: POM
Bezeichnung gemäß ISO 29988-POM-K,,E-GNR,1-2

PREPROCESSING
Pre/Post-processing, max. allowed water content: .2 %
Pre/Post-processing, Pre-drying, Temperature: 100 °C
Pre/Post-processing, Pre-drying, Time: 3 h

PROCESSING
injection molding, Melt temperature, range: 190 - 230 °C
injection molding, Melt temperature, recommended: 200 °C
injection molding, Mold temperature, range: 60 - 120 °C
injection molding, Mold temperature, recommended: 90 °C
injection molding, Dwell time, thermoplastics: 10 min

Processing

Usual single-flighted three-section screws with an effective screw length of at least 15 D, better 20 - 23 D are suitable for the injection molding of Ultraform.

Pretreatment

Granules or pellets in original packaging can be processed without any special pretreatment. Granules or pellets which have become moist due to prolonged or incorrect storage (e.g. by formation of condensed water) must be dried in dehumidifying or recirculating air dryers for approx. 3 hours at about 100 - 110 °C. The moisture content should not exceed 0.2 %.


Postprocessing

If parts were produced at a comparatively low mold temperature (e.g. in order to obtain short cycle times) and must not change their geometry in use thermal postprocessing inducing dimensional changes by postcrystallization may be necessary. In such cases parts should be stored in an oven with recirculated air at temperatures of 100 - 130 °C until dimensions don't change significantly any further. The time needed for this has to be determined experimentally.

PREPROCESSING
Pre/Post-processing, max. allowed water content: .2 %
Pre/Post-processing, Pre-drying, Temperature: 100 °C
Pre/Post-processing, Pre-drying, Time: 3 h

PROCESSING
Extrusion, Prepreg, Melt temperature: 175 - 180 °C
Extrusion, Pipes, Melt temperature: 175 - 180 °C

Processing

Ultraform can be processed to particular advantage using three-section screws having a total length L of 20 - 25 D and a constant pitch of about 1 D. However short-compression zone screws may also be used.

Pretreatment

Granules or pellets in original packaging can be processed without any special pretreatment. Granules or pellets which have become moist due to prolonged or incorrect storage (e.g. by formation of condensed water) must be dried in dehumidifying or recirculating air dryers for approx. 3 hours at about 100 - 110 °C. The moisture content should not exceed 0.2 %.

Postprocessing

Due to the different solidification and cooling of the melt which varies according to time and place stresses may arise, especially in the case of large wall thicknesses. These stresses can be removed by subsequent heat treatment. Tempering is essential when high demands are placed on dimensional stability. It can be carried out in air, liquid wax or oil at temperatures of 130 - 150, usually 140 - 145 °C. Lower temperatures are not effective. Duration: 10 minutes per 1 mm wall thickness.

PREPROCESSING
Pre/Post-processing, max. allowed water content: .2 %
Pre/Post-processing, Pre-drying, Temperature: 100 °C
Pre/Post-processing, Pre-drying, Time: 3 h

PROCESSING
Extrusion, Profiles, Melt temperature: 175 - 180 °C

Processing

Ultraform can be processed to particular advantage using three-section screws having a total length L of 20 - 25 D and a constant pitch of about 1 D. However short-compression zone screws may also be used.

Pretreatment

Granules or pellets in original packaging can be processed without any special pretreatment. Granules or pellets which have become moist due to prolonged or incorrect storage (e.g. by formation of condensed water) must be dried in dehumidifying or recirculating air dryers for approx. 3 hours at about 100 - 110 °C. The moisture content should not exceed 0.2 %.

Postprocessing

Due to the different solidification and cooling of the melt which varies according to time and place stresses may arise, especially in the case of large wall thicknesses. These stresses can be removed by subsequent heat treatment. Tempering is essential when high demands are placed on dimensional stability. It can be carried out in air, liquid wax or oil at temperatures of 130 - 150, usually 140 - 145 °C. Lower temperatures are not effective. Duration: 10 minutes per 1 mm wall thickness.

VORBEHANDLUNG
Pre/Post-processing max. zul. Wassergehalt evtl. Trocknung: .2 %
Pre/Post-processing Vortrocknung Temperatur: 100 °C
Pre/Post-processing Vortrocknung Zeit: 3 h

VERARBEITUNG
Extrusion Platten Massetemperatur: 175 - 180 °C

Verarbeitung

Ultraform® kann besonders vorteilhaft mit Dreizonen-Schnecken mit einer Gesamtlänge L von 20 - 25 D und einer konstanten Gangsteigung von ca. 1 D verarbeitet werden. Jedoch können auch Kurzkompressionsschnecken verwendet werden.

Vorbehandlung

Das originalverpackte Granulat kann ohne besondere Vorbehandlung verarbeitet werden. Durch längere oder unsachgemäße Lagerung (z.B. durch Kondenswasserbildung) feucht gewordenes Granulat muss in Trockenluft- oder Umlufttrocknern bei ca. 100 - 110 °C etwa 3 Stunden lang getrocknet werden. Der Wassergehalt sollte 0.2 % nicht überschreiten.


Nachbehandlung

Bedingt durch das zeitlich und örtlich unterschiedliche Erstarren und die Abkühlung der Schmelze können Spannungen entstehen, insbesondere bei hohen Wanddicken. Diese Spannungen lassen sich durch eine nachträgliche Wärmebehandlung abbauen. Bei hohen Anforderungen an die Dimensionsstabilität ist die Temperung unumgänglich. Sie kann in Luft, Flüssigwachs oder Öl bei Temperaturen von 130 - 150, meist 140 - 145 °C durchgeführt werden. Niedrigere Temperaturen sind wenig effizient. Dauer: 10 Minuten pro 1 mm Wanddicke.