Jingzhou production pressure sensitive adhesive
jingzhou production pressure sensitive adhesive of complaint water gel used in pressure sensitive adhesive has become a development trend of pressure sensitive adhesive, but also there are some disadvantages in use.
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.
Jingzhou production pressure sensitive adhesive complaints can dissolve in water, ethanol, ether and most organic solvents.
Book to formulation and preparation technology as the main line, from the perspective of application, introduced the various packaging adhesives introduced in plastic packaging, plastic composite packaging materials, paper packaging, corrugated carton packaging, cigarette packaging, labels, and surface protection tape, metal packaging, pressure-sensitive type sealing tape, packing sealing glue, and other fields of application of the typical formula of more than 290 cases.
A, printing ink, glue viscosity control in the actual production situation, the stand or fall of printing ink, glue move mainly related to viscosity, viscosity, the greater the transfer efficiency of the worse since the role of the solvent is solvent resin or additives, additives, etc. , given to liquidity make the ink, glue is easy to disperse.
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 flash point 77 ℃ (
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.
Jingzhou production pressure sensitive adhesive complaints increase percentage of styrene block 2 in the pressure sensitive adhesive, makes the pressure sensitive adhesive bonding performance improvement, at the same time, the skin of the residual is reduced.
When the viscosity is too large, hypersaturated state, liquidity is poor, cannot be evenly dispersed, but appeared together, easy to pile up together.
Methylacrylic acid: CH2 = C (
Pungent colorless crystals or transparent liquid.
Three, printing ink, glue viscosity change to purchase the problem with tape available knife cut, in imperceptible in take contents and sealing again.
General coating concentration control in 20%
It is advisable to 20 seconds.
Jingzhou production pressure sensitive adhesive complaints has stronger corrosion resistance and toxicity, are irritating to the skin.
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.
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