Plastic masterbatch use common problems and solutions

Masterbatch manufacturers: masterbatch very simple to use, just press a certain ratio and plastic resin mixed, with a variety of plastics processing requirements, extrusion can be.

Note that the color conversion, the hopper must be cleaned, with a primary or a plastic screw cleaning agent added in the machine rinse residual material cartridge, replacement of the filter, more preferably a 100 mesh filter; attention to the temperature is correct, and prevent color change.

Problems and treatment methods colored plastic products generally occur when:

1 product surface seeding:

The main reason:

① barrel and die with impurities;

② temperature is not correct;

③ raw material is heated too long residence time in the barrel;

④ masterbatch or toner dispersion untreated good;

⑤ filter has been perforated.

Treatment:

The presses the temperature to below the normal temperature 10-20 ℃, start the presses, plastic resin with color re slowest speed cleanup work, if necessary, to die apart to clean and adjust the temperature, the timely replacement of the filter . Use well-dispersed masterbatch or toner re-commissioning.

2 diffusion uneven:

The main reason:

① mixing uneven;

② temperature inappropriate;

③ masterbatch and materials compatibility poor;

④ presses itself plasticizing effect is poor;

⑤ masterbatch put the ratio is too small.

Treatment: stir, temperature adjustment appropriate replacement masterbatch or raw materials, replacement of other machine production, adjusted masterbatch delivery ratio.

3 often feed off:

The main reason:

① temperature is not correct;

② raw affinity difference;

③ masterbatch dispersion bad;

④ masterbatch delivery ratio is too high.

Approach: The more accurate temperature adjustment, replacement of materials used, replacement dispersed excellent masterbatch, masterbatch use lower proportion.

4 color variations:

The main reason:

① background inconsistent use of raw materials;

② presses are not clean;

Or the temperature of the toner low level ③ masterbatch used, the temperature is too high when the decoloring;

④ cutting the door is not clean;

⑤ process change;

⑥ color masterbatch or toner itself;

⑦ outlet material mismatches;

⑧ not clean blender or mixing time is not good control.

Approach: the use of color is consistent with the playing board and adjust the mix ratio of raw material good outlet; the presses, cutting doors and blenders thoroughly clean; switch to the proper temperature, consistent color masterbatch or toner ; using a stable process.