How to dry UV glue curing lamp

UV curing adhesive is composed of basic resin, active monomer, photoinitiator and other main components, and stabilizer crosslinking agent, coupling agent and other additives. Under the UV light of appropriate wavelength, the photoinitiator of UV glue curing lamp quickly generates free agent or ion, which leads to the polymerization and cross-linking of basic resin and active monomer into network structure, so as to achieve the bonding of bonding materials.

 

 

 

 

1.1.6 cation curing base tree

 

In theory, the cationic polymerized monomer can be used for cationic curing. It can obtain better physical and chemical properties through cationic polymerization or copolymerization of various monomers such as olefins, epoxies, ketals, vinegar, organosilicon and other heterocyclic compounds. The basic resin of this mechanism curing film appeared in the late 1980s, including vinyl ether series and epoxy series. Vinyl ether resin can be obtained by reaction of 311 vinyl ether with corresponding resin. But up to now, the most commonly used or modified epoxy resin or epoxy resin is mainly epoxy resin and bisphenol-A epoxy resin, silicone resin, epoxidized polybutadiene, epoxidized natural rubber, etc., among which the most commonly used is bisphenol-A epoxy resin, but its viscosity is high, and its polymerization is slow; aliphatic epoxy compounds generally have a faster polymerization speed, among which 3,4-epoxyclohexylformate -3,4-epoxy cyclohexyl methyl ester (cy179) is the most commonly used cationic curing aliphatic epoxy resin. It has low viscosity, aggregation and rapidity, and can be used with bisphenol A epoxy resin. The ring opening shrinkage of epoxy compounds is small, and UV curing compounds have been used on the basis of some polycyclic compounds. UV glue curing lamps can expand their volume in the polymerization process. For example, the volume expansion rate of original acetic acid and vinegar is 1.5% when ring opening, vinyl ether compounds are rich in electrons and can be used as cation curing polymerization reactors or diluents. On the one hand, the diluent plays a role of dilution, making the adhesive easy to operate; on the other hand, it plays a role of cross-linking, so it must have good reactivity. After curing, enter the resin network to cure the product

 

The final performance of. Active diluents are usually added to improve viscosity, adhesion, flexibility, hardness, and cure rate. The mechanical properties of different diluents may be very different from those of base resins. The main requirements are low viscosity, high dilution and high reaction ability, as well as volatility, toxicity, less irritant and unpleasant smell, low price, high stability and good compatibility of resin. Diluents are commonly used to regulate various properties.

 

 

 

1.2.1 free radical active diluent

 

Free radical active diluents are divided into the first generation of acrylic multifunctional monomers, the second generation of acrylic multifunctional monomers and the third generation of acrylic monomers recently developed. The first generation of acrylate polyfunctional monomers are 1,6-propanediol acrylate (HDDA) 2,1,4-butanediol acrylate (bdda), propylene glycol acrylate (dpgda), glyceryl acrylate (TPGDA), trimethylolpropane acrylate functional group (TMPTA) and pentaerythritol triacrylate (PETA), and the main light group triethylene glycol acrylate Methylpropane (TMPTMA). They replace the first generation of low active acrylic monomers. However, with the rapid development of UV curing technology, its great disadvantage of exposing skin irritation. Therefore, the second and third generation acrylic monomers have been developed to overcome the shortcomings of high stimulation, high activity and curing degree. Ethoxylated triethylene glycol acrylate Methylpropane (TMP (EO) TMA) and carboxytriethylene glycol acrylate Methylpropane (PO) TMA are introduced into the second generation of acrylic multifunctional monomers. The third-generation acrylic monomers of oxygen triacrylate C G (PO) ta o mainly contain Methoxyacrylate, which solves the contradiction of high curing speed, high shrinkage and low curing degree. This kind of products mainly include 1,6-hexanediol methoxy monoacrylate (hdomema), ethoxy neopentyl methoxy monoacrylate (TMP (PO) MEDA). The addition of alkoxy in the molecule can reduce the viscosity of the monomer and the stimulation of the monomer. In addition, the introduction of alkoxy in the UV glue curing lamp greatly improves the compatibility of the diluent monomer.

 

 

 

1.4 other additives

 

 

 

The main functions of auxiliary equipment are:

 

 

 

Production process of refined adhesive;

 

 

 

Increase the storage stability of colloidal substance;

 

 

 

Improve the construction performance of adhesive;

 

 

 

Improve the performance of rubber film, etc

 

 

 

UV curable adhesives are mainly stabilizer, leveling agent, defoamer, plasticizer and coupling agent.