Acrylic hot melt adhesive is an important category in the field of medical hot melt adhesive. With excellent bonding performance, biocompatibility, and diverse application scenarios, it is widely used in the medical and health field. The following provides a detailed introduction from the aspects of composition, characteristics, core advantages, and typical application scenarios:

1、 Core ingredients and formula characteristics

Acrylic hot melt adhesive is made from acrylic polymer as the substrate (such as polyacrylate, methacrylate copolymer, etc.), and is formulated by adding medical grade thickening resins (such as rosin derivatives, terpene resins), antioxidants, stabilizers and other additives. Its formula design strictly follows medical grade standards:

All raw materials comply with international biocompatibility requirements such as FDA and ISO 10993, ensuring no toxicity or sensitization when in contact with the human body;

Does not contain volatile organic compounds (VOCs) and harmful residues, avoiding irritation to the skin or mucous membranes.

2、 Key Performance and Advantages

High and stable bonding strength

It has strong adhesion to commonly used medical materials such as non-woven fabrics, films, paper, rubber, etc. After curing, the bonding layer is tough and can withstand repeated friction or slight stretching (such as skin deformation during human activities), and is not easy to peel off. For example, in medical dressings, it can ensure that non-woven fabric is tightly adhered to the water absorbing layer and backing film, and will not be layered during long-term use.

Waterproof and sweat resistant, suitable for humid environments

It has excellent water resistance and sweat resistance, and can maintain stable adhesion even in scenarios such as skin sweating, wound leakage, or contact with water (such as waterproof wound dressings during bathing), avoiding detachment due to moisture.

Excellent biocompatibility

After rigorous skin sensitization and irritation testing, it is friendly to sensitive skin and suitable for long-term contact with the human body (such as postoperative dressing fixation, chronic wound care patches, etc.), without causing allergic reactions such as redness, swelling, itching, etc.

Strong transparency and plasticity

After solidification, the colloid appears colorless or light yellow transparent, which does not affect the appearance of medical supplies (such as transparent band aids, invisible dressings); At the same time, hardness and flexibility can be controlled by adjusting the formula to meet the usage needs of different parts (such as joints that require softness and flexibility, while fixed catheters require slightly harder support).

Processing performance adapted to industrial production

The melting temperature is moderate (usually 80-120 ℃), compatible with mainstream hot melt adhesive coating equipment (such as roller coating, spraying, and dispensing machines), and the curing speed is fast (completed within a few seconds), which can meet the high-speed automation production line needs of medical supplies and improve production efficiency.

3、 Typical application scenarios

Medical dressings and patches

Band aids and infusion patches: used as a bonding layer to fix the absorbent cotton to the backing, while ensuring a tight fit with the skin to prevent bacterial invasion;

Transdermal drug delivery patch: As a drug carrier, the base gel can stably carry drug components, promote transdermal drug absorption, and leave no adhesive residue when peeled off.

Medical consumables assembly

Medical mask: used for bonding the ear strap and main body of the mask, or splicing the inner non-woven fabric to ensure stable structure and not affect breathability;

Catheter fixation patch: used to fix medical devices such as indwelling venous catheters and drainage tubes, with moderate adhesion and without damaging the skin when removed.

Special medical scenarios

Sports protective tape: suitable for joint movement parts, with both adhesive strength and elasticity, such as athlete muscle tape and postoperative rehabilitation fixation tape;

Baby care products: used for baby umbilical protection patches, fever reducing patches, etc. Due to their mild and non irritating nature, they can safely come into contact with the delicate skin of infants and young children.

4、 Differentiation advantages compared to other medical hot melt adhesives

Compared to silicone rubber and polyurethane hot melt adhesives, the core competitiveness of acrylic hot melt adhesives lies in:

Higher cost-effectiveness: The cost of raw materials is relatively controllable, making it suitable for large-scale production of disposable medical supplies;

Wide bonding range: The bonding strength to polar materials (such as non-woven fabrics and paper) is better than that of silicone rubber hot melt adhesives;

Better chemical resistance: can withstand short-term wiping with common disinfectants such as alcohol and iodine, suitable for scenarios that require frequent disinfection.

Acrylic hot melt adhesive, with its characteristics of strong adhesion, high safety, and multi scenario adaptation, has become an indispensable key material in the production of medical supplies, especially in disposable consumables and long-term skin contact products that require both performance and cost, demonstrating irreplaceable value.