Impact Plastics Blog

How Anti-Static Additives are Used in Plastic Sheet

Posted by Natalie K. MacVarish on November 13, 2017

Most of us have probably played with or experienced the shocking effects (sorry I had to) of static electricity– a small jolt of electricity in reaching to turn on a light switch, or when the hair on your head stands on end after taking off your hat. The phenomenon of static electricity occurs as a result of an imbalance between positive and negative charges in an object. These charges can build up on the surface of an object until they are released or discharged – remember the shock?

In plastic, the build-up of static can present challenges including dust build up, static discharge, and even the damage of packaged goods. To help combat this, additives can be added to the plastic sheet to helps reduce the amount of static build up. Continue reading to learn more about how anti-static additives are used in plastic.

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Topics: material selection

The Difference Between Amorphous & Semi-crystalline Polymers

Posted by Natalie K. MacVarish on August 23, 2017


A defining characteristic that separates different thermoplastic polymers is whether they are considered amorphous or semi-crystalline. Popular thermoplastics used in the packaging industry such as HDPE and polypropylene, are classified as semi-crystalline, while others such as polystyrene and ABS, are considered amorphous. The main difference between these classes of thermoplastics are the arrangement of the molecular chains and how they, in turn, affect the behavior of the polymer under heat. Continue reading to learn more about the differences between the two thermoplastic classifications:

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Topics: plastic sheet, material selection

What is the difference between thermoplastic and thermoset materials?

Posted by Natalie K. MacVarish on June 19, 2017

The terms ‘thermoplastic’ and ‘thermoset’ are used frequently to classify different plastic materials. So what exactly is the difference? The main characteristic that separates the two types of materials is their response to heat - one can be re-melted from a solid back into a liquid state, while the other will remain permanently in a solid state.

Continue reading to learn more about the differences between these two types of materials:


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Topics: plastic sheet extrusion, material selection

Plastic Processing Methods - Thermoforming vs. Injection Molding

Posted by Blake Kingeter on March 17, 2017

When designing a new part, a critical component of this process is determining the best processing method. While there are variety of plastic molding processes to consider, thermoforming and injection molding are two of the most popular methods used in the molding of plastic parts. However, there are a variety of factors to consider such as cost per part, tooling cost, design, and aesthetics, all of which are ultimately affected by the processing method used.

Below are a few key differences between these two popular plastics processing methods:

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Topics: material selection, thermoforming