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Aging problem of TPU film
With the continuous development of technology, TPU film​, as a high-performance plastic film, has been widely used in various fields. However, over time, TPU films may experience aging, which not only affects their service life but also poses a potential threat to safety during use. Therefore, understanding the aging problem and its causes of TPU films is of great significance for improving their service life and ensuring safe use.
2023-12-22
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Aging problem of TPU film

    With the continuous development of technology, TPU film, as a high-performance plastic film, has been widely used in various fields. However, over time, TPU films may experience aging, which not only affects their service life but also poses a potential threat to safety during use. Therefore, understanding the aging problem and its causes of TPU films is of great significance for improving their service life and ensuring safe use.

    1、 Aging behavior of TPU films

    The aging of TPU films mainly manifests as discoloration, hardening, brittleness, and cracking. The occurrence of these phenomena is often related to environmental factors, material aging, and improper use.

    2、 The causes of TPU film aging

    1. Environmental factors: High temperature, high humidity, ultraviolet radiation and other environmental factors can have a destructive effect on TPU films, accelerating their aging process.

    2. Material aging: TPU films can be affected by environmental factors such as oxygen and moisture during long-term use, leading to molecular chain breakage, cross-linking reactions, etc., thereby causing material aging.

    3. Improper use: Improper operations such as stretching, folding, and scratching during use can also accelerate the aging process of TPU films.

    3、 Preventive measures for TPU film aging

    1. Reasonable selection of materials: When selecting TPU films, materials with excellent weather resistance, chemical corrosion resistance, and aging resistance should be selected to reduce the occurrence of aging phenomena.

    2. Improve the usage environment: During use, environmental factors such as high temperature, high humidity, and ultraviolet radiation should be avoided as much as possible to extend the service life of TPU films.

    3. Correct use: During use, improper operations such as stretching, folding, and scratching should be avoided to reduce damage to the TPU film.

    4. Regular inspection: TPU films should be inspected regularly to promptly detect and address aging phenomena, in order to prevent potential threats to usage safety.

    4、 Solution to TPU film aging

    1. Material replacement: For TPU film that have already aged, materials with excellent weather resistance, chemical corrosion resistance, and aging resistance can be replaced to extend their service life.

    2. Repair treatment: For slightly aged TPU films, their performance and service life can be restored through repair treatment. For example, local repair techniques can be used to repair aging areas.

    3. Equipment replacement: For TPU films that are no longer repairable, new equipment or components can be replaced to solve the problem.

    In summary, understanding the aging problem and its causes of TPU films, and taking corresponding preventive measures and solutions, is of great significance for improving their service life and ensuring safe use. Meanwhile, attention should also be paid to details such as correct use and regular inspections during use to reduce damage and aging of TPU films.

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TPU hot melt adhesive film vs anaerobic adhesive: "Scene flexibility" difference in automotive interior bonding
2025-09-11
​From the perspective of curing conditions, TPU hot melt adhesive film does not need to rely on special environments, while anaerobic adhesives are severely restricted by "auerobicity". The curing principle of anaerobic glue is to undergo polymerization under conditions of lack of oxygen and catalyzed by metal ions (such as iron and copper). If it is in an environment where air circulation or metal substrates are not available, the curing speed will be greatly slowed down or even unable to cure. In automotive interiors, most bonding scenarios are "open" (such as bonding the door panel skin to PP substrate, and the ceiling fabric to the sponge), the air can freely contact the bonding surface, and the substrate is mostly non-metallic (PP, ABS, fabric, etc.), lacking metal ion catalysis, and additional catalyst is required when using anaerobic glue, and the curing time is as long as several hours, which is difficult to meet the needs of industrial production. The TPU hot melt adhesive film only needs to be melted by heating (120-160℃) and can be cured after pressurization and cooling. It does not need to rely on the ambient oxygen concentration or the base material. It can be cured stably in open or closed bonding scenarios, and the curing time only takes a few dozen seconds to a few minutes, adapting to the fast-paced needs of the interior production line.
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