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The Benefits of Using Ethylene Bis-Stearamide in Biodegradable Plastics

by:Sainuo     2023-07-22

In recent years, there has been a growing emphasis on the need to reduce the amount of plastic waste produced globally. One of the solutions proposed is the use of biodegradable plastics. However, the challenge with biodegradable plastics has been finding the right additive that will not affect their biodegradability. That is where Ethylene Bis-Stearamide (EBS) comes in. EBS is a chemical additive that has proven to be effective in improving the processing and mechanical properties of biodegradable plastics. In this article, we will review the benefits of using EBS in biodegradable plastics.

Understanding Ethylene Bis-Stearamide

EBS falls under the category of Waxes, which are naturally occurring materials used as additives in various industries. EBS often appears as a white powder or fine flakes that dissolve in some solvents but not in water. Its molecular formula is C38H76N2O2 and its molecular weight is 609.027 g/mol. EBS is manufactured by reacting ethylene diamine with two stearic acid molecules.

Enhances the Mechanical Properties of Biodegradable Plastics

Biodegradable plastics are known to have poor mechanical properties, such as low impact strength, tensile strength, and elongation. However, the addition of EBS as a wax can improve these properties. The lubrication properties of EBS allow for the creation of a uniform and consistent blend of the plastic particles. This creates a strong bond, reducing the brittleness of biodegradable plastics without affecting their biodegradability.

Increases Processing Efficiency

EBS also enhances the processing efficiency of biodegradable plastics by reducing the friction between polymer particles during processing. During production, biodegradable plastics often experience processing challenges such as clumping or sticking to processing equipment. These issues can easily be addressed with the addition of EBS into the plastic blend, which allows for the resin to flow freely through the machine, reducing the likelihood of blockages. This, in turn, reduces the number of production defects and material wastage, improving overall efficiency.

Acts as a Slip Agent

In addition to functioning as a processing aid, EBS is also known for its slip properties. Slip agents are essential in plastic manufacturing as they help prevent the plastics from sticking to processing equipment. EBS acts as an excellent slip agent in biodegradable plastics, which allows the plastic to slide off the machine parts smoothly, reducing the downtime caused by cleaning the manufacturing equipment. The addition of EBS in biodegradable plastics results in a smoother product application, which is ideal for products such as packaging, films, and bags.

Improves Coefficient of Friction (COF)

The coefficient of friction is a measure of the resistance of two surfaces against each other, and it's an essential property of plastic products. For instance, if the plastic package has a higher COF, it will be easier to grip and hold; the same applies to films and other plastic items. EBS can improve the COF if it's not already within the acceptable range. It does this by reducing the friction between the surfaces of the plastic products and ensuring they glide smoothly past each other during application.

Compatible with Most Plastics

Another benefit of using EBS as an additive in biodegradable plastics is that it is compatible with most plastics. It can be blended with plastics such as polyethylene, polypropylene, polystyrene, and polyethylene terephthalate without interfering with their mechanical properties. Most importantly, EBS is considered safe for human consumption and has been approved by the FDA for use in food packaging.


As we seek to find sustainable solutions to the increasing plastic waste in the environment, biodegradable plastics remain promising. With the addition of Ethylene Bis-Stearamide, the prospects of biodegradable plastics improving their mechanical properties while maintaining their biodegradability have been significantly enhanced. EBS improves the processing efficiency and properties of biodegradable plastics, making them an eco-friendly alternative to traditional plastics.

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