·Packaging for food products is particularly important to preserve product quality and shelf life The most used materials for food packaging are plastic glass metal and paper Plastic films produced based on petroleum are widely used for packaging because they have good mechanical properties and help preserve the characteristics of food However
·This chapter discusses the bentonite applications Bentonites are comprised predominantly of the smectite group of minerals a distinct disadvantage is the high shrinkage imparted by montmorillonites White 1947 An example is the use of bentonite in bituminous emulsion coatings for the surface protection of concrete Sodium bentonite
The dosage of paint additives in the paint is little but can significantly improve the performance of paint and it has become an indispensable part Thickener is a rheological additive that not only thickens the coating prevents sagging in construction but also gives excellent mechanical properties and storage stability For the lower viscosity of the water based paint it is a very
·Paint is any pigmented liquid liquefiable or solid mastic composition that after application to a substrate in a thin layer converts to a solid film Bentonite Powder pH7 Natrosol 250 HEC Cationic change capacity Inorganic Rheology Modifier Aluminosilicates Montmorillonite 7
Five advantages of bentonite in coating applications 01 Has a thickening effect bentonite forms a flocculent substance in water which has a thickening effect and its molecular groups can be combined with the organic base material in the coating which can enhance the water resistance of the coating and improve the strength and adhesion of the coating
·One powerful and widely used fungicide for dry film protection is iodopropynylbutylcarbamate IPBC with efficacy against blue stain strains and mold growth on paint surfaces Yet IPBC has disadvantages like possible yellowing in the dried paint film and a medium to high leaching potential which may lead to shorter dried paint film life spans
·The demand for massive cement production requires vast raw materials consumes high energy incurs high costs and contributes to generating 8 10 % of carbon dioxide C O 2 emissions which causes enormous ecological and health issues can be mitigated by adopting sustainable practices such as using eco friendly materials in cement
·This study has shown that bentonite can be used to significantly improve the moisture barrier properties of sustainable starch coatings for paper and board reducing the water vapour transmission rate WVTR of the base paper from 780 to ≤10 g m 2 day −1 for the optimised starch bentonite plasticizer coating formulation It has demonstrated
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