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2022.09.05
Common sense of solvent-free laminating adhesive
Solvent-free adhesive manufacturers believe that solvent-free adhesive is one of the basic elements of the composite process, and its main impact is reflected in the whole process of production and use. Its main influence can be reflected in the following aspects or indicators, such as: 1) the range of the substrate and the use of the composite film; 2) working temperature and viscosity; 3) mix ratio and tolerance; 4) normal temperature viscosity and working viscosity (Working temperature);5) curing temperature and curing time; 6) transparency; 7) peel strength; 8) friction coefficient; 9) Functionality (such as retort resistance, medium resistance, etc.) 10) heat sealing strength; 11) weather resistance, etc.
2022.08.23
Solvent-free laminating glue: problems in using solvent-free glue
Solvent-free laminating adhesive manufacturers said that the solvent-free adhesive will not volatilize VOCs, nor will it produce any irritating odor. At the same time, the problem of solvent residue in composite packaging is solved, the erosion of organic solvents on ink is eliminated, and clean production can be realized, which is conducive to environmental protection. Solvent-free composite equipment does not require a drying channel, reducing energy consumption. Moreover, in the later curing process, the curing temperature of solvent-free composite is basically the same as that of dry composite, so the energy consumption is relatively close.
2022.08.18
What are the advantages and common types of PU adhesives?
In recent years, in order to meet the requirements of the lightweight development of auto parts, plastic parts are widely used in automobile manufacturing, especially high-strength FRP (glass fiber reinforced plastic) and SMC (sheet molding composites), so the advantages of PU adhesives and What are the common types?
2022.08.12
How to use pu adhesive?
Pu glue, namely polyurethane glue, is a two-component adhesive made of resin and emulsion pre-polymerization. Mainly used for wood, aluminum, color steel plate and metal, polystyrene foam bonding. Good adhesive strength, no organic solvent, excellent heat resistance. The product can be cured at room temperature or by heating. In the final analysis is the plastic that we often say in our life, so how to use PU adhesive?
2022.08.08
PU adhesive should pay attention to what problems?
PU glue has excellent adhesion fastness, good heat resistance and weather resistance, colorless and translucent, environmentally friendly, non-toxic, easy to operate, suitable for assembly line production. Glue is usually divided into two categories: water-based PU glue and oily PU glue, so what are the problems that PU adhesives should pay attention?
2022.08.01
Preparation of Solvent-free Polyurethane Adhesive
One-component solvent-free polyurethane adhesive, as usual, does not need to be prepared and can be used directly according to operational requirements, which is also the reason why one-component adhesive is easy to use. For two-component or multi-component solvent-free polyurethane adhesive, it should be prepared according to the instructions. If the hydroxyl group content and the isocyanate group content are known, the distribution ratio of each group can be determined by stoichiometric calculation. The isocyanate index R = NCO/OH is generally in the range from 0.5 to 1.4.
