PEVA film, as a material widely used in daily household, outdoor products and medical clinical products, has chemical resistance as an important part of its many excellent properties. This film not only has the environmental advantages of being non-toxic, environmentally friendly and biodegradable, but also exhibits excellent chemical resistance, which enables it to maintain stable performance in various complex environments.
The chemical resistance of PEVA film mainly comes from the stability of its molecular structure and the inertness of its chemical composition. Polyethylene (PE) as the main chain provides good mechanical strength and chemical stability; while vinyl acetate (VA) as a comonomer enhances the softness, impact resistance and processing properties of the film. This unique molecular structure enables PEVA film to resist the erosion of a variety of chemical substances.
In daily life and industrial production, PEVA films are often exposed to various weak acids and weak bases. Due to their chemical stability, these films can effectively resist the erosion of weak acids such as acetic acid, carbonic acid, and dilute hydrochloric acid, and can also resist the influence of weak bases such as ammonia. This property makes PEVA film an ideal choice for making products that require good acid and alkali resistance, such as food packaging and pharmaceutical packaging.
Although PEVA film is not completely immune to all organic solvents, it has better solvent resistance than many other materials. Common organic solvents such as ethanol and acetone have less erosion on PEVA film under appropriate conditions. However, for some highly polar solvents or highly soluble solvents, such as benzene and toluene, it is still necessary to pay attention to their potential impact on the film.
PEVA film has excellent grease and water resistance. This means that it is not easily penetrated or absorbed by grease, and it can also effectively prevent the intrusion of water. This property makes PEVA film have significant advantages in making products that require waterproof and oil-proof properties, such as kitchen supplies, outdoor tents, etc.
Although PEVA film has good chemical resistance, its performance is still affected by many factors. For example, the thickness, density, type and content of additives of the film will affect its chemical resistance. Therefore, during use, some factors need to be strictly controlled to ensure the stable performance of the film. In order to further improve the chemical resistance of PEVA film, the film formula design can be optimized, and the chemical resistance of the film can be improved by adjusting the ratio of PE to VA and adding appropriate amounts of stabilizers, antioxidants and other additives;
Daily PEVA film has shown a wide range of application prospects in many fields due to its excellent chemical resistance. By continuously optimizing the formula design, improving the production process and strengthening the post-processing process, its chemical resistance can be further improved to meet higher-level market needs.