This is the free Material Data Center Datasheet of Ultraform® H4320 AT - POM - BASF

High-molecular-weight grade for the extrusion of semifinished product; particularly thick walled product can be extruded at high output rates; the material also features high thermal stability and low discoloration.

Abbreviated designation according to ISO 1043-1: POM
Designation according to 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.

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, Plates, 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.