Application of polyurethane in construction
The nature of polyurethanes allows them to adapt to solve challenging problems, mold into unusual shapes, and enhance industrial and consumer products. The chemistry of polyurethane can be essential for ongoing advancements in environmental care and the efficient use of our natural resources. Polyurethane is a highly versatile material capable […]
Application of polyurethane in construction
The nature of polyurethanes allows them to adapt to solve challenging problems, mold into unusual shapes, and enhance industrial and consumer products. The chemistry of polyurethane can be essential for ongoing advancements in environmental care and the efficient use of our natural resources. Polyurethane is a highly versatile material capable […]
Specifications and properties of polyethylene film
Plastic films are lightweight, transparent, unaffected by biological factors, resistant to chemicals and weather conditions, printable, corrosion-resistant, shatterproof, and show resistance to temperature changes ranging from 60 to 200 degrees celsius. In packaging terminology, plastic films are a thin and elastic layer of an organic material. Due to their low […]
The role of ethylene vinyl alcohol in food packaging
Ethylene vinyl alcohol, or EVOH for short, is a thermoplastic that is water-soluble (water-absorbing) and is derived from the copolymerization of ethylene and vinyl alcohol. The structure of this copolymer is resistant to chemicals and has very low permeability to oxygen, aromas, and odors. The percentage of ethylene comonomer in […]
Hazards of solvents and low-quality resins in laminating adhesives
Adhesives are compounds used for sealing and packaging, and they can migrate into food during packaging or storage. The adhesives commonly used in the packaging industry include hot melt polyurethanes, cold seal, pressure-sensitive, and acrylic adhesives, which can be water-based, solvent-based, or solventless. The selection of adhesives should be based […]
Extrusion lamination and co-extrusion lamination (extrusion coating)
Definition of extrusion lamination and extrusion coating lamination (co-extrusion) What is extrusion lamination? Extrusion lamination is a process in which a material undergoes plastic deformation by applying force. This material takes on the cross-sectional shape of the mold, and if the material has suitable properties, that shape remains in […]
Hazards of isocyanates in the workplace
What are isocyanates? Isocyanates are a family of highly reactive chemical compounds. They are produced from chemical reactions in plastics and polyurethanes. Isocyanates are widely used in the manufacture of flexible and rigid foams, fibers, coatings such as paints and varnishes, and elastomers, and they are increasingly utilized in the […]
Anti-fog additive in polymer films
In recent years, the use of polymer films has gained widespread application in greenhouse coverings and packaging of various products, including food, due to their desirable properties, transparency, and cost-effectiveness. One of the challenges associated with the use of polymer films is the formation of fog (or dew). Fog formation […]
What is Cellophan?
The first flexible film Is cellophane, a thin and transparent sheet made from regenerated cellulose. Its low permeability to air, oils, greases, bacteria, and liquid water makes it useful for food packaging. However, cellophane is highly permeable to water vapor, which can be mitigated by coating it with nitrocellulose lacquer. […]
Laminating adhesive for flexible packaging
In this article, we will introduce the laminating adhesive for flexible packaging. In the past, packaging may not have been considered very important, but today various products are transported worldwide under different temperature conditions. Therefore, various criteria have been proposed for ideal packaging to ensure it demonstrates a minimum level […]