Kujtim (Tim) Bizati
Principal Application Development Scientist, Synthomer
Principle Application Development Scientist at Synthomer. Tim leads multiple projects in polyolefin development and applications to durable and consumable markets in the adhesives industry. He is currently leading projects involving the application of Artificial Intelligence to the development and inverse design of Synthomers polyolefin copolymers. He also works with Synthomers tackifier resins in determining polymer compatibility and performance. Tim has an M.S. in chemical engineering from NC state university with a focus on math applications in chemical engineering. He has a total of 17 years in the adhesives and sealants industry and has experience in multiple adhesive chemistries.
A Polyolefin Copolymer with High Adhesion and Cohesion Imparting Superior Performance in Hygiene Construction
The largest bonded area in a hygiene article is the chassis region, and today the demand for high performing hot melt adhesives (HMA) is increasing in this application. A real challenge exists in achieving a high cohesive strength HMA while maintaining sufficient adhesion over the life cycle of the product. Although a hygiene article such as an adult incontinence or femcare product or a baby diaper is a consumable product, it requires durable traits for the consumer. The end user exerts high levels of static shear stresses on the article during use. The nonwoven and polyethylene materials in the hygiene article are adhered together by a very thin layer of HMA coating, and good cohesion is often a trade-off with sustained adhesion. The new polyolefin-based copolymers are designed to resolve this challenge for well-balanced performance.
At the body temperature, adhesive strength begins to weaken almost immediately to a point where the bond between the low surface energy (LSE) materials is insufficient. Reconciling high cohesion and sustained high adhesion upon ageing on LSE materials at low coat weights is the solution offered by Synthomer. At Synthomer, we developed a Ziegler-Natta catalyzed PP-PE random copolymer that when combined with tackifier produced a well-balanced, high-performing hot melt adhesive. The HMA produced can be both slot die coated and spray applied. Polyolefin HMA formulation strategy and HMA application data for the slot die-coated HMA is shared.
Breakout XII – Trends in Hotmelt Adhesives – 12 September 2025 – 11:30 – 12:00 – Room 2