ã€Chinese Packaging Network News】 White film is widely used in real life, common courier bags, milk film, washing powder bags, toothpaste tubes, protective film, food packaging bags, etc., it is through the white masterbatch with the resin in the crowded Blending in plastics machines is followed by blown film, flowing, drawing and other processes, because the white masterbatches of various manufacturers vary widely in the selection and processing of raw materials, and in addition, the film makers may be inappropriate in the selection of white masterbatch. Caused such problems in the film production, the following common problems and solutions written down to communicate with everyone.
First, the surface of the film has a crystal
1, blown film material itself has a problem
1 added back material;
2 added filling masterbatch;
3 Blown film new material itself has quality problems during polymerization.
2, white mother's problem
1 white mother is not good dispersion;
2 white mother water is high;
3 The density of the filter in the white mother is not enough.
Second, the film colored flow pattern
1. The masterbatch does not match with the blown film.
2, blown film machine screw and screw gap.
Third, the film heat seal, printing intensity is not good
1. Partial cross-linking occurs during corona treatment of the film.
2. The type of dispersant in the white masterbatch formulation was incorrectly added.
3, white masterbatch formulations too much dispersant added.
4, the effect of film opening Slip masterbatch.
Fourth, there are bubbles on the film
1, blown film sample body problem
1 added back material;
2 add filling masterbatch;
3 Blown film new material itself has quality problems during polymerization.
2, white mother's problem
1 white mother is not good dispersion;
2 white mother water is high;
3 white masterbatch low molecular weight dispersant added too much;
4 color masterbatch and blown film material melting fingers do not match.
Fifth, the film is susceptible to yellowing and discoloration
1. The use of white masterbatch titanium dioxide is not correct;
2. Phenol or hindered phenolic antioxidants.
Six, film smell
White masterbatch dispersants contain animal fats.
Seven, film blowing machine die too much deposits
1, white masterbatch low molecular weight dispersant content is too high;
2, blown film material itself contains a slip agent.
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