Hot melt pressure sensitive adhesive is a kind of pressure sensitive adhesive, mainly made of synthetic rubber, resin and rubber oil mixed into a melting state and then coated in cotton paper, non-woven fabric or plastic film and other substrates and made of a new adhesive tape. Low cost is its biggest advantage, the disadvantage is that the viscosity affected by temperature is obvious. Mainly used for all kinds of sealing box, sealing box, paper packaging, beverage bottle label, sealing aluminum foil, flexible packaging and other packaging and environmental protection paper pallet, suitable for all kinds of materials.
Medical hot melt pressure sensitive adhesive is a classification of medical hot melt adhesive, widely used in the processing of medical tape, infusion paste, band-aid and other medical and health products. Medical hot melt pressure sensitive adhesive has both hot melt and pressure sensitive. In the process of making adhesive products, it needs to be heated and melted by special equipment, which reflects the hot melt property. The adhesive products such as medical adhesive cloth and band-aid can be glued by finger pressure after being torn in use, which reflects the pressure sensitive property.
Requirements and standards for medical hot melt pressure sensitive adhesives
When medical hot melt pressure-sensitive adhesive is used in medical products such as medical tape, elastic bandage, wound paste and surgical incision film, various problems arising from contact with skin must be considered, which are described as follows:
First, hypoallergenic
The medical hot-melt pressure-sensitive adhesive products in use require no irritation to the skin, such as redness, itching, small papules and other allergic reactions.
Second, air permeability
Hot melt pressure sensitive adhesive products have good breathable performance, it will greatly reduce the skin allergy, and make the skin covered by adhesive products as usual breathable breathing, for the skin sweat, keep the wound dry, accelerate the wound healing has a positive effect.
Third, adhesion
Human skin is different from dry and oily, there is also the difference between thick and no hair, and smooth and rough, medical hot melt pressure sensitive adhesive products can adapt to the needs of most people's skin, paste on the skin, can be in a humid or stuffy environment, skin sweat, body fluid secretion, still maintain a certain adhesive force, does not produce warped and quickly fall off the phenomenon.
Forth. Compatibility with skin
(1) Peeling strength should not be too large: the peeling strength of the medical hot melt pressure-sensitive adhesive products of the paste skin should not be too large, and should be kept within a certain limit, otherwise the skin will have a feeling of tightness and discomfort. When it is removed, there is a sense of pain and it is easy to pull up the hair and damage the skin.
② The initial viscosity of the skin is better: because the material is mostly used in the wound or around the wound, it should not be squeezed hard, so the initial viscosity of the rubber products is better, and the instant can stick to the skin.
(3) No residual glue after tearing: no residual glue remains after tearing from the skin, especially around the edge of the adhesive material.
Fifth, adapt to disinfection treatment
Many adhesive stickers and wound stickers applied to wounds need to be disinfected, and adhesive products can not be deteriorated because of disinfectants. At present, gamma-ray and drill ray disinfection has little effect on glue, and hot steam disinfection may cause changes.
Sixth. Medical tests must be conducted
(1) Cytotoxicity test: check the possible existence of precipitated toxic substances in the adhesive.
(2) Skin irritation test: It is used to test whether there is possibility of skin irritation caused by precipitates in the material after gluing.
(3) Skin allergy test: Repeat the trial in different age groups and different people to test the skin allergy reaction.
