First, polyethylene blown common ills and solutions

1. The surface of the film was cloudy
Reason: masterbatch filler and more poor dispersion masterbatch, extrusion screw speed is too fast, the extrusion screw temperature is too high or too low, the head temperature is too high or too low.
Solution: appropriate to reduce the speed, adjusting screw cooling water temperature, adjust the head temperature. Reduce masterbatch filler content, improve masterbatch pigment dispersion.

2. bubble tube rupture
Reason: masterbatch impurities, there are holes masterbatch, masterbatch inorganic pigment coke.
The solution: increase the filter fineness, strengthen masterbatch filter in manufacturing, strengthen mixing, vacuum switch when the organic pigment masterbatch extrusion.

3. The film flatness difference
Reason: masterbatch containing more filler.
Workaround: Reduce the amount of filler masterbatch.

The film bag sealing bad
Reason: masterbatch containing more wax.
Workaround: Reduce the wax content of masterbatch

Second, the masterbatch common ills and solutions in cast film applications

1. The cast film reticular structure
Reason: pigment content is too high, poor heat resistance pigments, masterbatch moisture.
Solution: appropriate to reduce the temperature of each masterbatch be dry, choose a high pigmented strength, heat resistance and good pigment choice, strengthen hair, an appropriate increase in water temperature.

2. The cast film hiding bad
Reason: the film of titanium dioxide content is low
The solution: increase the amount of masterbatch to improve the content of titanium dioxide masterbatch, using the R-type titanium dioxide.

3. The cast film colored point
Reason: poor pigment dispersion
Workaround: use good dispersion of pigments, pigment grinding strengthened.

4. Processing smoke
Reason: masterbatch volatiles more
Workaround: Reduce the extrusion temperature, the choice of high-temperature dispersant.

Third, the masterbatch in plastic sheet applications common ills and solutions

1. The sheet was cloudy
Reason: masterbatch dispersion unevenness in the sheet, the value low processing temperature, high temperature resin authorities.
The solution: increase the cylinder temperature, raise the temperature of the die lip, lower cylinder temperature, lower die lip temperature, improve masterbatch dispersion.

2. sheets with longitudinal stripes
Reason: masterbatch impurities, impurities within the die lip.
Workaround: reinforced filter.

3. The sheet has bubbles
Reason: masterbatch moisture, the processing temperature is too high.
The solution: reduce the processing temperature, masterbatch dry.

Fourth, the masterbatch problems and their solutions in blow molding applications

1. A color
Reason: masterbatch dispersion bad blow insufficient air pressure, poor heat resistance masterbatch.
The solution: increase the air pressure, appropriate to reduce the temperature of each increase masterbatch carrier MI, use heat-resistant paint.

2. colored point
Reason: masterbatch dispersion bad, bad plasticized resin.
The solution: increase the filter fineness, improve molding temperature, improve pigment dispersion.

V. Masterbatch for molded foam products have problems and their solutions

1. Light color
Reason: pigment content is low, poor heat resistance of the pigment.
The solution: increase the masterbatch pigment content, selected in line with anti-180 ℃, 30min pigments.

2. stomata
Reason: pigment particles large, raw material impurities, masterbatch impurities, the carrier is incompatible.
Solution: Check each raw material, improve pigment dispersion, masterbatch manufacturing reinforced filter, for compatible resins.

3. Foam dimensional instability
Reason: pigment crystal structure
The solution: increase the amount of blowing agent, foaming temperature increase, instead pigment new varieties.

Sixth, the masterbatch cause injection problems and their solutions

1. Gloss bad
Cause: nozzle outside temperature is low, long molding cycle, more titanium dioxide masterbatch, masterbatch pigment dispersion is poor.
The solution: increase the nozzle temperature, shorten the molding cycle. Reducing titanium dioxide masterbatch, enhance masterbatch pigment dispersion.

2. uneven color
Reason: the pot temperature, long molding cycle and resin compatibility is not good.
The solution: reduce the pot temperature, using good compatibility carrier.