Silicone rubber hot melt adhesive plays an extremely important role in the medical field, providing reliable guarantees for the production and application of numerous medical products with its unique composition and excellent performance.
This type of hot melt adhesive is made of silicone rubber, also known as polydimethylsiloxane, as the main material, carefully blended with crosslinking agents, fillers, and other additives. From the composition, one can glimpse its extraordinary quality. The main chain of polydimethylsiloxane is composed of alternating silicon and oxygen atoms, with organic groups attached to the silicon atoms. This molecular structure endows silicone rubber hot melt adhesives with a series of outstanding characteristics.
Its biocompatibility is excellent. Non toxic and odorless, it has passed extremely strict food grade certifications such as FDA, EN14350, and medical standards, and can directly contact human tissues without any concerns, ensuring safe and worry free use in medical settings. Even the most sensitive skin can coexist harmoniously with it, making it the best choice for the production of medical products that come into long-term contact with wounds, such as high-end medical dressings, catheter fixation devices, and wearable medical device sensor patches.
In terms of physical properties, silicone rubber hot melt adhesives also perform outstandingly. It is soft and elastic, able to perfectly fit the curves of human skin. When it needs to be peeled off, the pain generated is extremely light, almost with low pain adhesive properties, greatly reducing the discomfort of patients. In terms of temperature adaptability, the ability to withstand high and low temperatures is outstanding. The long-term temperature resistance range can span from -60 ℃ to 200 ℃, and even in a short period of time, it can withstand high temperatures up to 300 ℃; If modified with benzene, its low temperature resistance can be as low as -73 ℃. Whether in cold medical storage environments or high-temperature disinfection processes, it can maintain stable performance without affecting the bonding effect and product quality due to temperature changes. Its chemical stability is also quite excellent, resistant to ozone, ultraviolet radiation, and climate aging. Its service life can exceed 20 years in outdoor environments. When applied to medical products, it can effectively resist various chemical substances and natural environmental influences, ensuring the reliability of the product under complex usage conditions.
In terms of processing and application, silicone rubber hot melt adhesive also has significant advantages. It has good melt flowability and can smoothly pass through various coating equipment during the production process, achieving efficient coating; The crosslinking density can be precisely controlled according to actual needs, thus finding a perfect balance between adhesion and cohesion. It can firmly bond various materials and ensure that they will not be difficult to separate due to excessive bonding during use. The effective regulation of surface energy enables it to exhibit excellent bonding effects on various commonly used medical materials, such as plastics, metals, fabrics, etc., greatly expanding its application scope in medical product production.
For example, in the production of high-end wound dressings, silicone rubber hot melt adhesive can perfectly bond materials with the ability to absorb exudate to the outer layer of the skin, providing a good healing environment for the wound while ensuring stable adhesion of the dressing to the skin, and not causing damage to newly formed tissue during replacement. In the production of wearable medical device sensor patches, their excellent biocompatibility and soft elasticity ensure the comfort and stability of users when the device is attached to the skin surface for data monitoring for a long time, without causing adverse reactions such as skin allergies. At the same time, reliable adhesion can prevent the patch from falling off during daily activities, ensuring the continuity and accuracy of monitoring data.
