QIs the water-based PU adhesive easy to apply?
AMost operators need a period of adaptation, but after becoming proficient, they will feel better to apply than oily glue. Moreover, Good water-based PU adhesive is easier to clean and handle.
QDoes the water-based PU adhesive really only need to be brushed once?
A(1) Since the solids content of Good water-based PU is as high as 50%, which is more than 3 times that of traditional oil-based rubber, one glue process is sufficient. (2) During the production process, employees must be required to paint in place, otherwise the lack of glue will directly cause non-stick.
QWhat parts of the shoes are mainly bonded with Good water-based PU adhesive?
Abottom processing, the bonding of the outsole and the midsole; Molding, bonding of the upper to the combined sole.
QCan the upper spread with the Good water-based PU glue still be bonded the next day?
AIt is recommended to re-brush the glue once again and then proceed to the next process, because the cross-linking reaction has occurred after 12 hours of gluing, and the initial viscosity will decrease.
QWhy does the Good water-based PU adhesive have the phenomenon of "hard brush"?
A(1) The special structure of Good water-based PU glue causes once the colloid has skin forming, that is, can not be re-dissolved in water, if the skinning is not cleaned up in time, the adhesive film sticking to the bristles will inevitably make the brush more and more sticky, that is, the so-called "hard brush" phenomenon. (2) The phenomenon of "hard brush" is the biggest operating problem of Good water-based PU glue, which can only be improved through effective skills, such as immersing the glue brush in the glue bowl to prevent premature dry brush phenomenon, or directly soak the brush in warm water and drain it well before use. (3) Once the brush is hardened, it must be replaced, otherwise it is very likely to affect the operation efficiency.
QHow to clean and reuse the hardened brush?
A(1) Soak it in warm water first, and then use a wire brush or wire roller to clean off the glue film and particles in the bristles, and then it's reusable. (2) The proper way to keep cleaned-up brush is to soak it in warm water, and drain it well before use.
QHow is the waterproof performance of Good water-based PU adhesive?
A(1) The dried film of Good water-based PU adhesive and the finished product with good bonding have good performance in waterproof. (2) A certain amount of hardener must be added during use to guarantee the performance of Good water-based PU adhesive, including water resistance.
QHow to dispose of the unused Good water-based PU glue?
A(1) The unused glue should be poured into the special waste liquid recycling bin, and cannot be poured back into the original barrel containing the glue. (2) Because glue is easy to skinning, it should not be poured into the city sewer pipe to avoid blockage. (3) Good water-based PU glue should be used as soon as finish formation, using a small amount each time to avoid waste.
QHow to use the glue spray correctly?
AThere are six steps to the correct use of glue spraying: Step One: turn on the ventilation system at the construction site, open the doors and windows, and ensure that the site is well ventilated; Step Two: Before construction, check whether the gun spray's function is normal and eliminate water accumulated in the air pressure pipeline; Step Three: The surface of the material must be clean, without any grease, dust or other impurities; Step Four: The nozzle sprays evenly on the surface of the material; (1) Straight type: the nozzle should be at an angle of 45° to the surface of the material; It is the best for the nozzle to be within 0.5 meters from the surface of the material; the air pressure of the nozzle should be adjusted to 6-8kg (normal requirements) (2) Fan: the nozzle should be perpendicular to the surface of the material, spraying a evenly fan-shaped glue mist, and the fan-shaped angle is 45°; Step Five: After spraying, leave it for 1-5 minutes before bonding (or till get non-stick adhesive layer); Step Six: Proper pressure during bonding will make the bonding effect better.
QWhy does poor spraying effect occur during use?
AThis is related to the quality of the spray gun, uneven air pressure, uneven spraying distance, temperature change, and improper selection of product models by users.
QWhy is the smell of spraying more intense in autumn and winter?
AThis is related to the low temperature in autumn, winter and the poor ventilation, as well as the adhesion is too fast, resulting in the smell of spraying glue cannot be completely released.
QWhy is the glue not as strong in winter as it is in summer?
ATemperature, humidity and adhesive spraying practices are the three major factors affecting the adhesion of adhesive spraying.
QWhy is the spraying uneven and not easy to fall apart?
AThe air pressure is too low and the temperature is too low to affect the viscosity; the viscosity is too strong and causing a blocked spray gun. This is when the air compressor air pressure or air duct should be adjusted, and the workplace temperature should be adjusted; the glue should be mixed with dilution, and the spray gun should be cleaned with a cleaning agent.
QWhy do abnormalities such as "wire drawing, adhesion below average" appear from time to time in the bonded material?
AThis has a lot to do with the temperature control of the heating roller, the thickness of the glue and the drying time after pasting. When the general temperature is too low or the glue is too thick to completely dry, or the drying time is so short that the glue has not been completely crystallized and solidified, resulting in below average adhesion, the above adverse conditions might happen.
QWhy is it that after 1 hour of laminating, the glue in the glue tank becomes thicker and thicker and difficult to glue?
AWhen the glue is being poured in the glue tank, its contact area with the air so large that resulting in the volatilization of the solvent in the glue, thereby affecting the viscosity of the glue.In this case, it is required to add a small amount of diluent to adjust the viscosity to the most appropriate level for coating during the process.
