Active Bio-Based Pressure-Sensitive Adhesive Based Natural Rubber for Food Antimicrobial Applications: Effect of Processing Parameters on Its Adhesion Properties

Abstract

A novel active bio-based pressure-sensitive adhesive incorporating cinnamon oil (Bio-PSA/CO) obtained from the mixture of natural rubber (NR), xyloglucan (XG), and cinnamon oil (CO) for food antimicrobial applications were successfully developed by using a two-roll mill mixer. The effect of the main process factors (i.e., nip gap and mastication time) and XG content on the adhesion properties of the obtained PSA were investigated with different coated substrates including kraft paper, nylon film, polypropylene (PP) film, and aluminum foil (Al). The results suggested that the developed NR-PSA/CO could be applied well to all types of substrate materials. Peel strength and shear strength of the NR-PSA/CO with all substrate types were in the ranges of ~0.03 × 102–5.64 × 102 N/m and ~0.24 × 104–9.50 × 104 N/m2, respectively. The proper processed condition of the NR-PSA/CO was represented with a nip gap of 2 mm and a mastication time of 15 min. An increase in XG content up to 40–60 phr can improve the adhesion properties of the adhesive. The resulting material could be used as an active sticky patch to extend the shelf-life of food in a closed packaging system. The shelf-life of the food samples (banana cupcake) could be extended from 4 to 9 days with NR-PSA/CO patch.

Asphaltene-Stabilized Polyisobutylene Pressure-Sensitive Adhesives for Ultraviolet Protection and Surface Bonding

“…Therefore, asphaltenes at a mass fraction of 5–10% act as tackifiers for the polymer matrix, probably because they are partially soluble in the matrix and act similarly to oligomeric compounds used for the same purpose [ 25 , 26 , 27 , 28 , 45 , 101 ]. Since the polymer matrix initially has a good tackiness, its additional plastification harms the apparent strength of the adhesive joints, likely due to a decrease in cohesion strength.…”

Chlorosulfonated Poly(propylene carbonate)-Based Pressure-Sensitive Adhesives with Improved Thermal Stability and Peel Strength

“…9,10 They are safe to use, easy to handle, and removable and have increasing potential to replace conventional adhesives. Commercial PSAs can be roughly classified into three main types: poly(acrylates), 11,12 rubbers, 13,14 and thermoplastic elastomers 15,16 ; however, most of them are not biodegradable and would accumulate in the surrounding environments. Recently, a new series of biodegradable polyurethane PSAs, suitable for packaging and construction, have been developed by Toyo Ink Group.…”

“…PSAs are used widely in our daily life as well as in various industrial fields, including electronics, , displays, , encapsulation, , and biomedical devices , resulting from the fact that the adhesive layer provides a straightforward means to bond two different substrates without damaging them. , They are safe to use, easy to handle, and removable and have increasing potential to replace conventional adhesives. Commercial PSAs can be roughly classified into three main types: poly(acrylates), , rubbers, , and thermoplastic elastomers , ; however, most of them are not biodegradable and would accumulate in the surrounding environments. Recently, a new series of biodegradable polyurethane PSAs, suitable for packaging and construction, have been developed by Toyo Ink Group .…”