Factors Affecting TPU Membrane Waterproofing and Moisture Permeability

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TPU waterproof and moisture-permeable membrane is a new type of functional environmentally friendly plastic film, drives the rapid growing of related applications of clothing fabrics and medical accessories, medical surgical gowns. There are some factors affect the waterproof and moisture permeability of the TPU membrane.

1.    TPU raw material

TPU membrane raw materials are the main factor affecting waterproof and moisture permeability.

TPU film made of conventional TPU raw material is a type of air-locking film with low air permeability and moisture permeability.

The waterproof, moisture-permeable and hygroscopic TPU raw material contains excellent hygroscopic components, so excellent waterproof and moisture-permeable properties of finished TPU membrane.

2.    TPU membrane thickness

Film thickness also has a great influence on moisture permeability, but film thickness is not directly proportional to moisture permeability of TPU membrane.

3.    Additives

The production of TPU films is inseparable from various additives.

Anti-sticky additives can effectively reduce the viscosity of the film.

The TPU membrane waterproof and moisture permeable properties will be reduced if adding the additive which not hold waterproof and moisture permeable properties.

It is appropriate to choose additives with waterproof and moisture permeable TPU as the carrier to reduce the impact on the moisture permeability.

The additive does not have waterproof and moisture permeable properties. After adding it, it will reduce the moisture permeability of the film. It is appropriate to choose additives with waterproof and moisture permeable TPU as the carrier to reduce the impact on the moisture permeability.

POLYSAN TPU membrane factory in China, is professional in producing and manufacturing excellent quality TPU membrane, comply with OEKO-TEX cert.