Hot melt pressure-sensitive adhesive is a kind of pressure-sensitive adhesive. It is mainly made of synthetic rubber, resin and rubber oil mixed and heated into a molten state, and then coated on the base materials such as cotton paper, non-woven fabric or plastic film.

Low cost is its biggest advantage, but the disadvantage is that the viscosity is obviously affected by temperature. It is mainly used for all kinds of box sealing, box sealing, paper packaging, beverage bottle labels, sealing aluminum foil, soft packaging and other packaging and environmental protection paper pallets, etc. it is suitable for all kinds of materials.

Medical hot-melt pressure-sensitive adhesive is a classification of medical hot-melt adhesive. It is widely used in the processing of medical and health products such as medical adhesive tape, infusion paste, wound paste and so on. Medical hot-melt pressure-sensitive adhesive has both hot-melt and pressure-sensitive properties. In the process of making adhesive products, it should be heated and melted by special equipment, which reflects the hot-melt property. When its adhesive products such as medical adhesive tape and wound adhesive are used, it can be bonded by finger pressing after tearing, which reflects the pressure-sensitive property.

Requirements and standards for medical hot melt pressure sensitive adhesives

When medical hot-melt pressure-sensitive adhesive is applied to medical products such as medical tape, elastic bandage, wound paste and surgical incision film, various problems caused by contact with skin must be considered, which are briefly described as follows:

1. Hypoallergenic

The medical hot-melt pressure-sensitive adhesive products in use are required not to stimulate the skin, such as redness, itching, small papules and other allergic reactions.

2.Air permeability

Hot melt pressure-sensitive adhesive products have good air permeability, which can greatly reduce the skin allergy, and make the skin breathe as usual after being covered by adhesive products, which plays a positive role in perspiration, keeping the wound dry and accelerating wound healing.

3.Adhesion

People's skin is different from dry and oily, there are also differences between dense and no sweat hair, as well as smooth and rough. Medical hot-melt pressure-sensitive adhesive products can meet the needs of most people's skin and stick to the skin. They can still maintain a certain adhesion under the conditions of skin perspiration and body fluid secretion in a humid or muggy environment, It does not rise and fall off quickly.

4. Compatibility with skin

① The peel strength should not be too large: the peel strength of medical hot-melt pressure-sensitive adhesive products pasted on the skin should not be too large and kept within a certain limit, otherwise the skin will feel tight and uncomfortable. When it is removed, it will feel pain and easily pull up the sweat and damage the skin.

② The initial adhesion to the skin is better: because most of the materials are used on or around the wound, they should not be squeezed hard, so the initial adhesion of rubber products is better and can stick to the skin in an instant.

③ No residual glue after tearing: there is no residual glue left after tearing from the skin, especially at the surrounding edges of adhesive materials.

5. Adaptive disinfection treatment

Many adhesive stickers and wound stickers applied to wounds need to be disinfected, and the adhesive products cannot deteriorate due to disinfectants. At present, gamma ray and drill ray disinfection have little impact on the adhesive, while hot steam disinfection may cause changes.

6. Medical tests must be carried out

(1) Cytotoxicity test: check the possible precipitated toxic substances in the adhesive.

(2) Skin irritation test: it is used to test and check whether there are precipitates in the material after gluing to stimulate the skin.

(3) Skin allergy test: repeat the test in different ages and different people's skin to test the reaction of skin allergy.

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