Professional Polymer Technology
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Solvent Free Adhesive are designed to create a strong b […]
Solvent Free Adhesive are designed to create a strong bond. They can be made from a variety of materials, and they are usually tailored to specific types of surfaces such as plastics, wood, or metals. The strength of the bond varies, depending on the product and its intended use. Some adhesives are designed to allow for relatively easy separation, although residue may be left behind, and others are intended to create a permanent bond.
Solvent-free adhesive is a kind of polyurethane adhesive, which can be a single component can also be two-component adhesive, simply say that in the absence of solvent conditions to achieve the bonding and bonding media. Is a green environmental protection can be used for food packaging and other potential adhesives.
The traditional polyurethane adhesive is mainly solvent-based, because it uses a large amount of solvent in the compound process, it will produce solvent residue in the compound process, which is not conducive to the safety of food packaging. Solvent can solve the problem of solvent residue. With the strengthening of national regulations and environmental awareness, solvent-free use will be more and more widely, it will not only be used for food packaging, pharmaceutical packaging, will also be used in car stickers, furniture and many other areas, Composite apartments and dry composite process compared to the integrated cost savings of about 20-30%.
Howevr,the effect of the PE film on the smoothness of the PE film is high. In the process of solvent-free composite process, the composite structure with PE film (especially PE film thickness <45μm) is more prone to increase the friction coefficient when the curing temperature exceeds 40 ℃ The This is mainly because: PE film blow molding process, the same amount of slippery agent in the same conditions, the thinner PE film, the amount of slippery per unit area will be less; in the solvent-free compound, the higher the aging temperature , The more intense the molecular movement of the slip agent, the migration to the solventless adhesive layer reacts with it, resulting in more consumption of the slip agent, resulting in an increase in the coefficient of friction of the final composite product. You need to ensure the quality of composite under the premise of reducing the amount of glue, while reducing the curing temperature.