Polyether TPU Film Manufacturers

How resistant are the polyether TPU film to hydrolysis or water exposure over extended periods?

Polyether TPU film is generally known for their excellent resistance to hydrolysis compared to other TPU types. However, the degree of resistance can vary depending on the specific formulation, thickness, and any additional treatments the film undergoes.

Here are a few factors to consider when evaluating the hydrolysis or water exposure resistance of polyether TPU films:

Polyether Backbone:
Polyether-based TPUs, compared to polyester-based TPUs, tend to offer better resistance to hydrolysis. This is because the polyether segments in the polymer chain are less susceptible to water degradation, making them more durable in humid or wet environments.

Testing Conditions:
To assess hydrolysis resistance, TPU films are typically subjected to accelerated aging tests where they are exposed to high humidity or water at elevated temperatures over a specified period. The results of these tests will tell you how long the film can maintain its performance characteristics (e.g., flexibility, tensile strength) under water exposure.

It's important to ask the supplier for specific hydrolysis resistance data for their films, particularly if you plan to use them in environments where the material will be exposed to high levels of moisture, water, or prolonged outdoor conditions (e.g., marine, medical, or industrial applications).

Film Thickness and Performance:
Thicker films often have better resistance to water absorption due to the increased material mass. However, thinner films may be more prone to degradation when exposed to prolonged water contact.
Film treatment (e.g., surface coatings or additives) can enhance hydrolysis resistance by providing a protective barrier or increasing the water resistance of the polymer.

Typical Applications:
Polyether TPU films are commonly used in applications like medical supplies, clothing (e.g., cold-resistant clothing), and sports equipment, where hydrolysis resistance is critical for maintaining performance over time. This suggests that these films are generally engineered to withstand exposure to water or humidity, making them suitable for short- to medium-term exposure in many applications.

Long-Term Resistance:
Over extended periods (e.g., years of continuous water exposure), even the best hydrolysis-resistant polyether TPU films may experience gradual performance degradation, especially if exposed to high heat, high humidity, or aggressive chemicals.
For long-term applications (such as medical, industrial, or outdoor uses), you should confirm the expected lifespan of the film based on real-world conditions and request data on how the material behaves after prolonged exposure to water or high humidity.

Polyether TPU film generally offer good hydrolysis resistance due to their chemical structure, but their performance over extended periods of water exposure will depend on the exact material grade, film thickness, and environmental factors. It's crucial to request specific testing data from the supplier to verify how the material will perform in your intended application, especially for long-term or high-stress environments.