Author：Baby & Adult Diaper Materials FROM：Diaper Materials Manufacturer TIME：2023-03-03
The main components of raw materials for sanitary napkin industry hotmelt adhesive include high polymer, tackifying resin, softener and antioxidant, etc. Each component has different degrees of influence on the performance of hotmelt pressure sensitive adhesive.
The high polymers used in raw materials for sanitary napkin industry hotmelt adhesive are thermoplastics such as styrene-butadiene-styrene block copolymer (SBS) and styrene-isoprene-styrene block copolymer (SIS). Elastomer. Thermoplastic elastomers are the essential components that give them cohesion and adhesiveness. SBS has good fluidity and a wide range of hardness; SIS has good fluidity, low hardness and flexibility, and high stretchability; SBS and SIS copolymers can be divided into linear block copolymers and star-shaped block copolymers, of which the star-shaped structure Compared with the linear structure, it has the characteristics of good heat resistance and low viscosity.
Tackifying resins impart tack and adhesion to hot melt adhesives. Tackifying resins include rosin resins, terpene resins, hydrogenated petroleum resins, and the like. Rosin resin is divided into ordinary rosin, hydrogenated rosin, polymerized rosin and modified rosin; terpene resin is mainly terpene resin polymerized by α-terpene. Rosin resin and terpene resin have the characteristics of low price, sufficient supply and strong adhesion, but heavy odor, dark color and poor thermal stability. Hydrogenated petroleum resin is a petroleum deep processing product, mainly including C5 hydrogenated petroleum resin, C9 hydrogenated petroleum resin, and C5/C9 copolymerized hydrogenated petroleum resin. Hydrogenated petroleum resin has the characteristics of light odor, light color, good thermal stability, but high price.
The main function of the softener is to reduce the melt viscosity of the hot melt adhesive, improve the wettability and coatability of the glue to the adherend, increase its initial viscosity, and reduce the cost of the adhesive. In addition, the softener can also appropriately enhance the flexibility and cold resistance of the glue. Common softeners include naphthenic oil, white oil, phthalates, low molecular weight polybutadiene, etc. Among them, naphthenic oil has the best effect.
The main function of antioxidants is to prevent oxidative deterioration of polymers and tackifying resins at high temperatures. The common antioxidant used in hot melt adhesives is tetra[methyl-β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, which is an efficient hindered phenolic antioxidant. .
raw materials for sanitary napkin industry hotmelt adhesive is a thermoplastic polymer-based adhesive, which is widely used in the disposable hygiene products industry. Understanding the main components of hot melt pressure sensitive adhesives will help people to better use this material.
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