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Mianyang production sealing adhesive agent

by:Sinograce Chemical     2020-12-18
In mianyang, mianyang production sealing glue agent production sealing glue agent is described in the patent WO2013/020556, to join the formation of styrene on the rubber base material of block copolymer ( Molecular weight 34000 ~ 45000) , can improve the peel strength and viscosity, and do not increase the hardness of pressure sensitive adhesive. In recent years, with the development of economy, all kinds of commodity packaging increases rapidly, make the soft packing also is able to rapid development, it is hoped that the new technology, new products is constantly improving, innovation. Ink, glue viscosity automatic tracker are in eager expectation and requirement of the people was born. Below is the actual production in the process of printing ink, glue viscosity of high and low, to analyze the influence of product quality. Mianyang production sealing glue agent flash point is 77 ℃ ( Open cup) 。 PUR reactive hot melt adhesive, it is through the reaction of moisture curing, also can saying is the water molecules through chemical reactions into a solid, chemical reaction, reaction time, can according to the factors and the contact area and so on in the air. A, printing ink, glue viscosity in the actual production and control of ink, glue cannot smoothly in and out of mesh, let alone transfer, thus version is prone to blocking phenomenon. In the process of printing, composite, the viscosity of control is the key, particularly in the 80 - Output of 140 m/min high-speed gravure and compound, with the passage of the actual, the solvent in constant volatilization, viscosity also gradually rise, liquidity becomes poor. Although in the deployment of ink, glue, there are 3 # cup and a stopwatch for 5 testing viscosity values, but rely on artificial methods monitoring is difficult to control printing composite dynamic moment of change, more can't control the accuracy of the continuous adding solvent quantity. In production, when printing, composite viscosity rise, are artificial with adding solvent to dilute viscosity kettle. Add, the more printing color change after production, the greater the homogeneous degree of the composite is poorer, fastness also drops, thereby increasing the return and the rejection rate. Second, ink, glue viscosity changes on the quality of the product thermal decomposition can produce poisonous gas. Five, ink, glue viscosity change with strong reading if the relationship between printing ink, glue composite viscosity is too small, it shows that excessive solvent content in the ink, glue, and resin, pigments and other components are relatively less, so can't form a smooth layer when dry, so white, become dull, lack of gloss. Ink, glue viscosity control whether appropriate, directly with the transfer of ink pigment, female version, print gloss, pigment adhesive fastness, compound uniformity and stability to the vast majority of the quality problem of the relationship. Viscosity value of cause: ink printing ink scraping clean, the net transfer is not good, poor flowing property, residual solvents, trailing, line, print and scraper is shorter. Composite glue viscosity value transfer big can also cause bad, poor flow property, poor, residual solvents, transparent of peel strength, poor, poor heat sealing strength, serious influence on production quality and yield and efficiency. Mianyang production sealing glue agent also, hot melt adhesive also provides a good anti-theft function, due to the adhesive penetration into the corrugated, any attempt to open the carton will tear fiber. Have strong corrosion resistance and toxicity, are irritating to the skin. Three, printing ink, glue viscosity changes bring purchasing problem 2, can also be observed in appearance, if the hot melt adhesive glue type, rough work, then the quality. Mianyang production sealing glue agent if you are unwell seek immediate stored in shady and cool place, prevent sun point-blank, save the temperature is 5 ~ 40 ℃ product features solids 50 + / - 2% ( 105℃±1. 5℃/ 3 h) PH 6. 5 to 7. Natural rubber pressure-sensitive adhesive pressure sensitive adhesive glass transition temperature should be keep in general - 20℃~- 60 ℃ range is suitable, of course, different use requirement of pressure sensitive adhesive formulation system have different Tg values. When the viscosity is too large, hypersaturated state, liquidity is poor, cannot be evenly dispersed, but appeared together, easy to pile up together.
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