Page 206 - Handbook of Adhesion Promoters

9.17 Food applications 199

9.17 FOOD APPLICATIONS

The following commercial adhesion promoters are used in food packaging applications:
Bomar BR-742S & BR-7432GI30 and Regalite R1090. Their main active components are
acrylates and rosin.
Food particles are agglomerated to obtain good handling and dissolution properties. 1
Several principles are used in agglomeration, including: 1
• van der Waals forces (decreasing distance and increasing contact area)
• liquid bridges generated by low viscosity binder solutions
• viscoelastic bridges generated by sintering
• viscoelastic bridges generated by addition or in-process generation of high vis-
cosity binder solutions
• solid bridges generated by solidification of liquid or viscoelastic bridges.
The adhesion of food emulsions to food contact surfaces is a problem in the recy-
2
cling of packages and cleaning of industrial equipment. Surfaces having different hydro-
philicity such as polytetrafluoroethylene, low-density polyethylene, poly(ethylene
2
terephthalate), stainless steel, and glass have been used in these applications.
A combination of adhesion promoters comprising an organotitanium compound
(e.g., Tyzor AA75, titanium diacetylacetonate) and a polyamide (synergist enhancing per-
formance of titanate) are used in solvent-based liquid inks and coatings for non-direct
3
food packaging.
REFERENCES
1 Dopfer, D; Palzer, S; Heinrich, S; Fries, L; Antonyuk, S; Haider, C; Salman, AD, Powder Technol., 238,
35-49, 2013.
2 Michalski, MC; Desobry, S; Babak, V; Hardy, J., Colloids Surf. A: Physicochem. Eng. Aspects, 149,
107-21, 1999.
3 Crandon, NM; N; Pagliuca, Mushtaq, S; Rimmer, DJ; Salthouse, PW, EP2611875, Sun Chemical BV,
Jul. 10, 2013.