Hello and welcome to my channel! My name is Herwig and I share with you my experiences as a polymer engineer, especially in the fields of polymer material selection, engineering and high performance polymers.
Enjoy my videos and best wishes!
Visit my blog Find Out About Plastics: findoutaboutplastics.com
Visit my online polymer training courses and check out the free training sections: juster-polymer-training.thinkific.com/courses/Polymer-Material-Selection
Visit my personal site: herwigjuster.com
Get in contact with me over the "contact me" link below.
Thanks for this feedback! Yes, measuring the melt viscosity in a capillary rheometer is better to get reliable results for a PA6-GF40; Standard for this is the ISO 11443. best regards, Herwig
Hello Herwig, Thank you for the great and informative video. I came across a question if the Ultrasonic welding process can generate harmful chemicals that can fail Biocompatability of parts. Do you have a white paper for this? Thanks in advance
Thanks for this feedback & follow up question! Ultrasonic welding is widely used for example in plastic food packaging and in this application case, US welding is not negatively influencing the food-contact plastic grades -> www.herrmannultrasonics.com/en-us/applications/food
Yes, i am more than 10 years in the world of polymer engineering and there are multiple career paths: you can work in almost any market - from medical, consumer goods, automotive, aircraft, airspace, to industry and different functions - part designer, processing operations, mould design, simulation, compound formulation - the list is long and demand is high in next years 😀
Hello, one major issue is the high volume on hot runner, that should be considered. In today´s mold we have 1400cc on HRS to a 500cc part. What do you think?
Hello, Were there any issues with checking force directly after molding? It can take time for the parts to complete the shrinking process after ejection. Maybe, assume that parts will shrink in a similar way.
Hi, thanks for your feedback and question! There are no issues known and ABS has almost isotropic shrinkage below 1% hence only a slight tendency for post-shrinkage.
Time stamps: 00:19 Environmental Stress Cracking (ESCR) 01:55 Mechanism of ESCR 03:42 How to analyze ESCR? 04:41 How to reduce ESCR? Enjoy and thanks for watching!
Time stamps: 00:15 Trinity thermal, chemical, and time 02:30 Chemical resistance of commodity and engineering polymers 04:36 Chemical resistance of high performance polymers Enjoy! Thank you for watching and till next time!
Time stamps: 01:07 Functionality questions 02:25 Selection Factor Questions here you can find all the questions as summary 👉www.findoutaboutplastics.com/2022/08/polymer-material-selection-defining.html
Time stamps: 00:41 Improve CTI of thermoplastics 04:03 What Should be the Minimum Transparency Level Required for Plastic Laser Welding? 05:22 Flame Retardant Classifications According DIN EN ISO 1043-4 - What do they mean? 08:22 How To Turn Thermoplastics Carbon Neutral Or Even Carbon Negative? thanks for watching!
Time stamps: 02:12 thermal conductivity vs. temperature 05:03 CLTE vs. temperature 06:34 specific heat capacity vs temperature Thank you for watching and till next time!
Thanks for your feedback and follow up question! Most thermoplastics transmit near-IR beam and the upper polymer layer needs to be transparent for wavelengths between 808 nm - 1064 nm. A minimum transmission rate of 5% is required. Best regards, Herwig
Why wall thickness is higher for unfilled materials than filled materials? For reinforced material thickness upto 3 mm is mentioned but for unfilled 5mm. For better dimensional stability reinforced material would be better as it won't shrink as much as unfilled. Pls. Let me know your thought.
Great video, I really liked it. Only request is to bump up volume of your all videos. It's very low and difficult to hear unless I use headphones,any other amplifier or see in laptop.
Danke für die sehr informativen Videos. Ich arbeite im Einkauf für technischen Kunststoffe und bin über jedes bisschen information zu dem Thema dankbar
Time stamps: 00:12 1. A word on resin drying 02:21 2. 5 keys to remember 04:28 3. Maximum moisture levels after resin drying 05:09 4. Checking the moisture level Thank you for watching and till next time!
Time stamps: 00:24 1. Uniform Wall Thickness 02:30 2. Rib Design 04:53 3. Radius 06:05 4. Draft Angels on Ribs 07:48 5. Undercuts Thank you for watching and till next time!
