Barrier properties created by dispersion coating

Abstract

The objective of this work was to gain insight into 1) how a coating layer with barrier properties is built up, 2) how different polymer dispersions and pigments function as a barrier against gases and fluids, and 3) how the thickness and evenness of the coating layer affect barrier properties. In addition to tests for permeability of water vapor, barrier properties required for functional applications (i.e., against solvents and acids) were studied. Permeability of an organic solvent (ortho-dichlorobenzene) and hydrochloric acid was studied as a function of barrier layer structure. Providing a barrier to these materials is important in the processing of printing functionality on paper. Pigment particle orientation and tortuosity were examined by infrared spectroscopy and by high-resolution, focused ion beam milling and imaging. The barrier properties were influenced by the thickness and evenness of the coating layer and the mass ratio between the pigment and latex. A barrier against water vapor did not always ensure a barrier against the organic solvent or the acid. In addition to barrier properties, the choice of coating materials affects coatability and may provide possibilities for cost savings.

The sealing behavior of new mono‐polyolefin and paper‐based film laminates in the context of bag form‐fill‐seal machines

“…8 The micromechanical structure was addressed for instance by the addition of platy fillers to improve barrier properties. 9 Layer structures were varied, for example, using two layers to increase barrier function. 10 The use of natural polymers like chitosan was also investigated to form a barrier.…”

Tailoring the Performance of Nanocellulose-based Multilayer-Barrier Paperboard using Biodegradable-Thermoplastics, Pigments, and Plasticizers

“…An example of the peel force vs. peeled length is given in supporting information. Attenuated total reflectance -Fourier transform infrared spectroscopy (ATR-FTIR) was used to determine the orientation of kaolin-pigment particles in both MFC-kaolin composite films and R2R coated samples according to the method described by Elton et al (1999) and Bollström et al (2013). Nicolet TM iS50 FTIR Spectrometer (Thermo Scientific, USA) with a diamond KRS5 ATR crystal and an incidence angle of 45 o was used for ATR-FTIR measurements.…”

Kaolinite-Starch based Nano-Composites and Applications

“…Because of the lightweight, biodegradable and recyclable nature of paper made from starch-clay composite, it is used as packaging materials. For achieving improvement in water barrier properties, water vapor transmission, mechanical property etc., surface coating is a significant tool [36][37][38][39][40]. Starch is extremely useful raw material because it has high molecular weight which easily undergo depolymerization, hydrophilic in nature and its hydroxyl group can be used in variety of oxidation or substitution reactions which may adjust its rheological properties and its retrogradation could be eliminated.…”