The generation of static electricity is inevitable in the process of blown film, which can cause many problems in production, such as increased film adhesion, reduced printing quality, damage to electronic components, and even the risk of fire. Therefore, the application of antistatic masterbatch is essential in the production of thin films.
1. The Function of Antistatic Masterbatch
The main function of an antistatic masterbatch is to form a conductive layer on the surface of plastic, allowing static electricity to quickly discharge from the surface of the plastic, thereby preventing static electricity from being generated.
Antistatic masterbatch can generally be divided into two categories: surface type and internal-type. Surface-type antistatic masterbatch is mainly applied to the surface of the film through coating or spraying to form a conductive layer and achieve the function of antistatic. Internal-type antistatic masterbatch involves adding antistatic masterbatch to the production process of the thin film, which disperses conductive particles in the plastic to form a conductive channel and achieve the purpose of antistatic.
2. Differences Between Common Antistatic Masterbatch and Food-Grade Antistatic Masterbatch
The main difference between common antistatic masterbatch and food-grade antistatic masterbatch is their composition and usage range. Common antistatic masterbatch is usually made of organic compounds, such as amino silicone oil, and is mainly used in general industrial fields, such as plastic bags and plastic boxes. Food-grade antistatic masterbatch is mainly used in the field of food packaging materials.
Its main component is food-grade raw materials certified by the FDA, such as polylactic acid resin, which is safer and more hygienic. Therefore, when choosing an antistatic masterbatch, it is necessary to choose the appropriate one based on the product’s usage environment and requirements.
3. How to Choose the Right Antistatic Masterbatch for Blown Film
When choosing the appropriate antistatic masterbatch for the blown film, we need to consider the following aspects:
3.1 Choosing the appropriate auxiliary agent for the antistatic effect
Firstly, we need to select an antistatic masterbatch that meets the required antistatic effect. Different products have different requirements for antistatic effects. Some products only require a certain degree of antistatic effect, while others require a high level of antistatic effect. Therefore, we need to select the appropriate antistatic masterbatch based on the specific product requirements.
3.2 Choosing antistatic masterbatch with minimal impact on transparency and hazing
Transparency and hazing are important indicators of plastic film, so we need to select an antistatic masterbatch that has minimal impact on transparency and hazing. Generally, pelletized antistatic masterbatch has less impact on transparency and hazing, while powdered antistatic masterbatch has more impact.
3.3 Choosing antistatic masterbatch with higher safety
For the food-grade film, choosing an antistatic masterbatch with higher safety is crucial. Pelletized antistatic masterbatch is generally safer because the amount of additives in pelletized antistatic masterbatch is lower, which has less impact on the plastic film.
3.4 Choosing mechanized production antistatic masterbatch
Antistatic masterbatches with higher mechanization levels can better meet the requirements of high-quality film production. Therefore, we should choose an antistatic masterbatch with a higher mechanization level in the production of blown film.
In summary, when choosing an antistatic masterbatch for the blown film, we need to consider the required antistatic effect, transparency, hazing, safety, and mechanization level to ensure the production of the high-quality film.