This article is provided by Jinan Saicheng Electronic Technology Co., Ltd

Adhesive patches are usually tightly adhered to the skin for a long time. If their moisture permeability is poor, it may cause the skin to have difficulty absorbing and draining sweat, leading to skin inflammation, allergies, and other problems. By testing the moisture permeability, it can be ensured that the patch will not cause damage to the skin during use.

Good moisture permeability helps to timely eliminate moisture and sweat inside the patch, thereby maintaining a dry and comfortable skin surface. This is particularly important for patients who wear patches for a long time.

Principle of infrared method for measuring water vapor transmission rate of ointment

The instrument adopts the infrared sensor method for testing principle. The test sample is clamped between a constant temperature dry and wet chamber, and there is a certain humidity difference on both sides of the sample. Due to the existence of humidity gradient, water vapor will diffuse from the high humidity chamber to the low humidity chamber. In the low humidity chamber, water vapor is carried by the carrier gas to the infrared sensor, and an electrical signal of the same proportion will be generated when entering the sensor. By analyzing and calculating the electrical signal of the sensor, the water vapor transmittance and moisture permeability coefficient of the sample can be obtained.

Application of infrared method for measuring water vapor transmission rate of ointment

Promoting drug efficacy: The efficacy of patches is closely related to their breathability. Good breathable patches can ensure that drug ingredients penetrate into the body through the skin, thereby exerting better therapeutic effects. Therefore, detecting moisture permeability is also an important indicator for evaluating the efficacy of patches.

Maintain drug stability: Plasters with good moisture permeability can reduce the penetration of moisture and oxygen, thereby extending the shelf life and stability of drugs. This is particularly important for patches that require long-term storage or transportation. 3、 Compliance with regulatory requirements and product standardization

Meet regulatory requirements: Drug regulatory agencies in various countries usually have clear requirements for the moisture permeability of patches. By testing the moisture permeability performance, it can be ensured that the patch complies with relevant regulatory requirements and can be legally marketed and sold.

Improving comfort: Adhesive patches with good moisture permeability can reduce skin discomfort and enhance patient wearing comfort. This is particularly important for patients who need to wear patches for a long time.

In summary, testing the moisture permeability of patches is of great significance for ensuring skin health and comfort, promoting drug efficacy and stability, complying with regulatory requirements and product standardization, and improving user experience and satisfaction. Therefore, in the research and development, production, and sales process of patches, high attention should be paid to the testing of moisture permeability performance.