Masterbatch particle of polyethylene plastic evaporation residue standard sample for food packaging and preparation method of masterbatch particle

Abstract

The invention discloses a masterbatch formula of a polyethylene plastic evaporation residue standard sample for food packaging and a preparation method of a masterbatch particle. The polyethylene plastic evaporation residue standard sample masterbatch particle is prepared by taking a base material, namely LDPE (low-density polyethylene) resin, an inorganic antiblocking agent, namely calcium carbonate, an antioxidant 1076, a diffusant, namely polyethene wax, a lubricant, namely zinc stearate, and a processing aid, namely fluorinated elastic body PPA (phenylpropanolamine) as raw materials sequentially via stirring, mixing, primary melting, mixing, extrusion and granulation, secondary melting, mixing, extrusion and granulation and tertiary melting, mixing, extrusion and granulation and is about 2mm in particle size. The preparation method is simple in technology; and the prepared standard sample masterbatch particle can be used for injection molding to form the polyethylene plastic evaporation residue standard sample for the food packaging, inter-laboratory comparison of detection of evaporation residue in plastic, verification of laboratory detection methods, quality control of laboratory testing results, evaluation of uncertainty of measurement, examination of personal training and the like.

Description

technical field [0001] The invention relates to a formula of a standard sample masterbatch granule and a preparation method thereof, in particular to a standard sample masterbatch granule of polyethylene plastic evaporation residue for food packaging and a preparation method thereof. Background technique [0002] In the current era when food safety is gradually rising as the focus of food testing, the impact of food contact materials on food safety has also become the focus of attention of various food manufacturers and consumers. At the same time, evaporation residue is also listed as a key inspection item for food contact material market access and export packaging materials in various countries. In various industry news, it is often seen that various food contact materials are exposed and detained due to unqualified evaporation residue. or returned messages. Evaporation residue is an index to detect the amount of chemical substances that may be precipitated when food con...

AI Technical Summary

Problems solved by technology

However, there are only test methods but no corresponding standard samples. The pretreatment and test techniques of each existing method are different. The results of different methods for the same sample are quite different, which brings troubles to the selection of evaporation residue detection standards.

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