TACKIFIER SOLUTION FOR BABY DIAPER HOT MELT ADHESIVES
SIS/SBS BASED HMA
Thinner, softer and leak-free diapers for babies are the market trend as customer demands. Diaper manufacturers are making investments in innovation to the better use of elastics and using new core technology to allow for better liquid distribution.
Hygiene adhesive is a kind of SIS/SBS based HMA, can be used in absorbent sanitary baby diapers. The types are identified as backsheet adhesives, construction adhesives, leg, and cuff elastic adhesives, wetness indicator adhesives, core adhesives, landing tape and stretch ear adhesives. Adhesives provide adhesion and elastic ability to each component of the diaper. How to choose a right adhesion solution, it will effect on strength, lightweight, elastic and cost for the baby care products.
Adhesives & Nonwovens in Diaper
In baby care market, there are two main types of adhesion system. SBC based polymers adhesive includes Styrene butadiene styrene (SBS), Styrene isoprene styrene (SIS), Styrene-ethylene/butylene styrene (SEBS) and Styrene-ethylene/propylene styrene (SEPS). SEBS is the hydrogenated form of SBS, SEPS is the hydrogenated form of SIS.
The disposable hygiene products use SIS/SBS based HMAs for the abilities to retain flexibility and elasticity at low temperature. They have well value in cost, and with benefits of high initial tack strength, while tend to harden (and lose adhesion) over time, especially exposed to sunlight and weather.
The other adhesion system is APAO based adhesive. Amorphous polyalpha olefins (APAO) system is non-crystalline adhesives that remain soft, tacky, and flexible giving longer open time and good adhesion.
It provides advanced moisture resistance, chemical resistance and heat resistance, especially the slight odour and low VOCs compared to SBC based adhesives. The key players of APAO polymers include Evonik, Eastman, REXtac and Qida Chemical.
Hydrogenated Terpene Resin is not exclusive any more
Foreverest Resource is a speciality bio-based derivative polymers supplier. The Extra Light Hydrogenated Terpene Resin HTR105 is designed for high-performance HMPSA, which used in disposable hygiene market, such as baby diapers, feminine hygiene, medical lamination, pet lamination application.
HTR105 has excellent properties in water white colour, thermal stability and weather resistance. It is a new product of terpene polymer. Unlike common terpene resins, HTR105 fixes the colour issue in personal care application has the same high adhesion performance compared to hydrogenated C5/C9 resins. It’s a bio-based tackifier for disposable hygiene adhesives.
Available Tackifier Resins for Disposable Hygiene HMA
| Tackifier Type | CAS Number | Chemicals Name | Softening Point R&B, °C |
Acid Value mgKOH/kg |
Color Gardner |
| Rosin Ester Based | 8050-31-5 | Glyceryl Rosinate | 85 to 95 | 10 max | 1 to 5 |
| 65997-13-9 | Glyceryl Hydrogenated Rosinate | 85 to 105 | 10 max | 1 to 5 | |
| 8050-26-8 | Pentaerythritol Rosinate | 90 to 115 | 15 to 25 | 1 to 5 | |
| 64365-17-9 | Pentaerythritol Hydrogenated Rosinate | 90 to 115 | 15 to 25 | 1 to 5 | |
| 006-47-7 | Polymerized Rosin Ester | 100 to 160 | 10 to 25 | 8 to 10 | |
| N/A | Maleic Modified Rosin Ester | 95 to 145 | 15 to 45 | 3 to 6 | |
| Terpene Phenolic Based | 68648-57-7 | Terpene Phenolic Resin | 100 to 130 | 1 max | 7 to 9 |
| 68648-57-7 | Terpene Phenolic Resin Emulsion | 95 to 105 | N/A | N/A | |
| 106168-39-2 | Hydrogenated Terpene Polymer | 100 to 110 | 1 max | 50 max, Hazen | |
| 31393-98-3 | Polyterpene Resin | N/A | 1 max | 4 to 6 | |
| 31393-98-3 | Polyterpene Resin | 120 to 165 | 1 max | 7 to 10 | |
| Styrenated Terpenes based | N/A | Styrenated Terpene Resin | 75 to 120 | 1 max | 3 max |
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