Identificador: TDX:3068
Autors: Ma, Jie
Resum:
Laundry detergent pod is a water-soluble pouch that contains highly concentrated laundry detergent, currently the pouch is made of Poly(vinyl alcohol) (PVA). As business continues to grow P&G would like to find some other materials able to replace PVA film. The objective of this PhD project is to look for alternative materials for SUD film, which would have similar detergent compatibility, water solubility, permeability and mechanical properties as PVA film. Additionally, we would like to discover whether the new material would bring new benefits.
In this thesis, films made of polyetheylen glycol (PEG), sodium alginate, Lactips material, caseinate material, as well as their blends with PVA were prepared, properties of those films were tested, and pouching prototypes of some of the films were prepared. Solution casting was selected as the method for preparing the films.
This thesis is composed of 8 chapters. Apart from Chapter 1 (General introduction and objectives), Chapter 2 (Materials and test methods), and Chapter 8 (General conclusions and future work),
Chapter 3 describes PEG-based films and their properties;
Chapter 4 describes sodium alginate-based films and their properties;
Chapter 5 describes Lactips material-based films, as well as their properties;
Chapter 6 describes pouch prototyping with Lactips film and discusses pouch stability;
Chapter 7 describes sodium caseinate-based films and their properties.
Repositori URV