Solvent-free laminating adhesives: trends in solvent-free adhesives
Solvent-free laminating adhesive manufacturers said that with the development of solvent-free compounding technology, many adhesive suppliers have introduced general solvent-free adhesives, cooking solvent-free adhesives, aluminum foil solvent-free adhesives, and low friction coefficient solvent-free adhesives. Although the diversification of products can meet the composite requirements of different materials, flexible packaging enterprises should frequently clean the gluing equipment and composite equipment according to the different adhesives used in different composite materials, which not only wastes time, manpower and financial resources, but also has low production efficiency.
Solvent-free laminating adhesiveThe manufacturer said that with the development of solvent-free composite technology, many adhesive suppliers have introduced general solvent-free adhesives, cooking solvent-free adhesives, aluminum foil solvent-free adhesives, and low friction coefficient solvent-free adhesives. Although the diversification of products can meet the composite requirements of different materials, flexible packaging enterprises should frequently clean the gluing equipment and composite equipment according to the different adhesives used in different composite materials, which not only wastes time, manpower and financial resources, but also has low production efficiency.
The development trend of solvent-free adhesive:
1. Functional solvent-free adhesive. Solvent-free laminating adhesive manufacturers said that solvent-free adhesives should be developed into functional products, such as benzene, toluene, xylene, esters, surfactants, pesticides and other chemical products.
2. UV curable solvent-free adhesive. In addition to fast curing speed, transparent product, high peel strength, and good flexibility of the finished product, UV-curable solvent-free adhesive also has the advantages of solvent-free, non-toxic, non-corrosive, energy saving and environmental protection. It can be used for rapid solvent-free compounding of plastic/plastic, plastic/paper, plastic/metal film and other materials.
3. Solvent-free adhesives for other industries. Solvent-free adhesives used in textile, automotive interior and other industries, as well as solvent-free adhesives used in paper (kraft paper, cardboard, plain paper)/plastic (transparent film, aluminized film, aluminum foil) composite.
Solvent-free laminating glue manufacturers said that the current penetration rate of solvent-free equipment is getting higher and higher, and many manufacturers have more experience and experience in the use of solvent-free. However, the high-temperature cooking sterilization process still has certain requirements for the total amount of interlayer glue (I. e. thickness), and the amount of glue in the general process is not enough to meet the needs of cooking sterilization. Therefore, the amount of solvent-free glue should be 1.8~2.5g/m2.
Now many manufacturers are beginning to realize and pay attention to the impact of environmental factors on product quality. After the demonstration and summary of a large number of practical cases, it is recommended that the environmental humidity should be controlled between 40% and 70%. Humidification is required when the humidity is too low, and dehumidification is required when the humidity is too high. Because a part of the water in the environment participates in the reaction of the solvent-free glue, too much water will reduce the molecular weight of the glue, causing some side reactions, thereby affecting the high temperature resistance during cooking. Therefore, in a high-temperature and high-humidity environment, it is necessary to adjust the configuration of the/B component in a small range.
The solvent-free laminating adhesive manufacturer said that the parameters are set according to different equipment models and configurations. The setting of tension, the accuracy of dispensing ratio, etc. are all details of control and confirmation. The high degree of automation, high precision and convenient operation of solvent-free equipment are its own advantages, but it also covers the meaning of meticulous and careful. Solvent-free production is a delicate job.
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