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How Ethylene Bis-Stearamide Reduces Static Charge in Plastics

by:Sainuo     2023-07-16

The modern world is awash with plastic; from the bottles we drink out of to the containers that store our food, plastic has become an essential part of our daily lives. But with this increased use of plastic comes one very annoying side effect: static charge.

We've all been there; trying to get a stubborn plastic bag to open in the grocery store, only to be met with a static charge that makes the bag cling to our hands. It's frustrating, and it's a problem that can also impact the quality of plastic products like packaging films, electronic components, and automotive parts.

Thankfully, there is a solution, and it comes in the form of ethylene bis-stearamide (EBS).

What is ethylene bis-stearamide?

Ethylene bis-stearamide is a chemical compound that is commonly used as a slip agent and anti-blocking agent in polymer products such as polyethylene, polypropylene, and polyvinyl chloride. It is also used as a lubricant, a mold release agent, and a processing aid.

EBS is a white, waxy solid that is insoluble in water but soluble in hot solvent, making it an excellent candidate for use in the plastics industry.

How does ethylene bis-stearamide reduce static charge in plastics?

Static charge is a common problem in plastic products, particularly in films and other thin materials. When two surfaces come into contact and then separate, the exchange of electrons can create a static charge that builds up on the surface of the material.

This static charge can cause a range of problems, including clinginess, discharging sparks, and attracting dust, dirt, and other contaminants. In some cases, it can also lead to more serious issues such as product failure and safety hazards.

EBS works by reducing the surface energy of the plastic, which in turn reduces the friction between the surfaces and minimizes the build-up of static charge. This is achieved by a process called polar interaction; the long-chain molecules of the EBS align with the surface of the plastic and become anchored to it, creating a thin layer that reduces the friction between the two surfaces.

The effectiveness of EBS as an anti-static agent depends on a range of factors, including the type of plastic, the processing conditions, and the concentration of the EBS. Different concentrations of EBS can be used depending on the desired effect, with higher concentrations providing greater anti-static properties but also increasing the risk of surface defects.

What are the benefits of using ethylene bis-stearamide in plastics?

There are several benefits to using EBS as an anti-static agent in plastics:

1. Improved product quality: By reducing the static charge in plastic products, EBS can help to improve the appearance and quality of the product. Clinging films and other materials that are difficult to handle can be made easier to work with, while products that are prone to discharging sparks can be made safer for use.

2. Increased productivity: Static charge can slow down the processing of plastics, particularly in high-speed manufacturing processes such as extrusion and injection molding. By reducing the build-up of static charge, EBS can help to increase the productivity of these processes, resulting in higher yields and lower costs.

3. Reduced maintenance: Static charge can also lead to increased maintenance requirements, with equipment becoming covered in dust and other contaminants that are attracted to the charged surfaces. By reducing the amount of static charge in the manufacturing environment, EBS can help to reduce maintenance requirements and downtime.

4. Greater flexibility: EBS can be used in a wide range of plastic products, from films and packaging materials to electronic components and automotive parts. This versatility makes it a cost-effective and flexible solution for combating static charge in the plastics industry.

5. Regulatory compliance: EBS is a commonly used anti-static agent in the plastics industry and is considered by regulatory bodies such as the US Food and Drug Administration (FDA) as safe for use in food packaging and other applications.


In conclusion, ethylene bis-stearamide is an effective anti-static agent that is widely used in the plastics industry. It reduces the build-up of static charge in plastic products, improving their appearance, quality, and safety, while also increasing productivity and reducing maintenance requirements.

As the use of plastic continues to grow, the importance of anti-static agents such as EBS will only increase. By choosing the right concentration and application method, manufacturers can achieve the best results in terms of product quality and cost-effectiveness.

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