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Category Archives: Plastic
Mar20
What is Tg (Glass Transition Temperature) and Its Role in PCBs?
Glass Transition Temperature (Tg) is one of the most important properties of all plastic and epoxy resin materials. In fact, the Tg value is also an indicator of the quality of the fiberglass fabric used in PCB manufacturing. However, compared … Continue reading
Jan02
How to Monitor the Quality of Incoming Plastic Resin?
This is a answer to a question from a community member asking about plastic quality control. The question was: “Can we rely solely on MI (Melt Index) values to monitor the quality of plastic resins? And does an increase in … Continue reading
Dec26
The Relationship Between MFI and Re-grind/Recycle Resin in Plastics
When discussing whether using re-grind resin in plastics leads to degradation, Workingbear sought advice from industry experts. Most professionals agreed that it does cause degradation. However, opinions on whether MFI values can reliably indicate the presence of re-grind resin are … Continue reading
Dec19
7 Ways to Identify if a Plastic Factory is Using Re-grind Resin
It’s an open secret in the plastic injection molding industry that re-grind resin is often added during injection. Some manufacturers even claim that, given the current competitive environment and cost-cutting pressures, it’s impossible to make a profit without using some … Continue reading
Dec12
Why Re-grind Resin in Plastic Injection Molding Causes Degradation and Weakens Strength
The use of re-grind resin and recycled material in plastic injection molding is a persistent challenge for engineers. The more re-grind resin or recycled material is added, the more severe the degradation of the plastic becomes. This degradation weakens the … Continue reading
