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Notice Under California Consumer Privacy Act ("CCPA")
Please be aware that by registering with BASF to learn more about products and services, making purchases, or initiating other business transactions with BASF, BASF will be collecting certain personal information about you and your internet activity for specific business purposes. For a description of the information collected about you and the business purposes for which that information is used, please click here: Table III Data Collection Purpose. For further information about BASF's overall data privacy practices, please review BASF's Privacy Policy, which may be accessed here: https://www.basf.com/us/en/legal/data-protection.html

Meet Brandon Budde

Brandon is our Technical Development Engineer here at BASF Wire and Cable Solutions

Brandon received a bachelor’s degree in Plastics Engineering in 2010 from Ferris State University and has been managing technical development projects with engineering and specialty plastics for the past 10 years. His knowledge with polymer processing includes TPU, PBT and other engineering plastics.

For the past five years Brandon has focused on extrusion applications of Elastollan® TPU in wire & cable. Brandon is knowledgeable on a wide variety of processing equipment, including: extrusion, blow molding, and injection molding.

Randy Fleck

Randy is our Sr. Technical Development Engineer here at BASF Wire and Cable Solutions

Randy has 39 years experience in the plastics industry. He provides technical support for injection molding, rotational molding, blow molding, and extrusion. Randy also worked 12 years in the injection molding industry in supervision, process engineering and project management.

Randy has expertise in crystalline & amorphous resins, injection molding, extrusion, rotational molding, over molding, injection/compression of thermosets, injection molding tooling, hot runners, mold filling, insert molding, and basic part design.

Yes, B6650LN must be dried in a desiccant drier for best processing and property performance. We recommend 100°C for 3-4 hours. Acceptable moisture content of pellets prior to processing is ≤0.04%. A moisture analyzer is a good tool to have to verify pellet moisture is in an acceptable range. See the attached drying curves for B6550LN.

Fig. 1 - Drying Time For Ultradur

It’s critical to get quantitative moisture data prior to processing because excessive moisture has the potential to affect tensile strength, elongation, abrasion resistance, and tear strength. Elastollan® TPU is hygroscopic, so, when it’s exposed to the atmosphere, it rapidly absorbs moisture.

We recommend a moisture level of less than or equal to 0.02% during processing (as shown in Figure 1). A common mistake is that many people don’t use moisture analysis prior to production. They purge material from the barrel, say “looks good” and set up a process. There often aren’t any visual indications during processing that the moisture levels aren’t acceptable. Unacceptable moisture levels are mostly undetectable to the human eye.

Dryer settings vary by hardness so it’s important to check the recommendations on the Technical Datasheet for your grade.


Figure 1: Moisture content over time

Elastollan® TPU is sensitive to moisture and can absorb excessive moisture in 20 minutes in warm/humid conditions. I strongly recommend that every production floor should have a simple hydrometer and temperature gage near its production press. This will remind processing technicians of the critical residence time that Elastollan® TPU spends between the outlet of the desiccant dryer and the feed throat of the extruder. At a standard room temperature of 73°F and 50% relative humidity Elastollan® TPU can absorb excessive moisture for processing in 20 minutes, which will affect mechanical properties (see results for abrasion testing). Conveying Elastollan® TPU to a properly sized extruder hopper with dry desiccant air is always preferred over production floor ambient air.

Moisture affects the ensuing bulk properties dramatically.

Processing Elastollan® TPU uses common screw and barrel designs, so special designs aren’t necessary. Elastollan® TPU is a shear sensitive material, and for this reason, a 3-section screw design with a L/D ratio of 24-30 and a compression ratio 1:2.5 to 1:2.7 is recommended. The following graph shows the maximum recommended RPM depending on your screw size.

Effects of shear.
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Notice Under California Consumer Privacy Act ("CCPA")
Please be aware that by registering with BASF to learn more about products and services, making purchases, or initiating other business transactions with BASF, BASF will be collecting certain personal information about you and your internet activity for specific business purposes. For a description of the information collected about you and the business purposes for which that information is used, please click here: Table III Data Collection Purpose. For further information about BASF's overall data privacy practices, please review BASF's Privacy Policy, which may be accessed here: https://www.basf.com/us/en/legal/data-protection.html