Calcium sulfate opening master batch and preparation method thereof

Abstract

The invention belongs to the field of agricultural film manufacture and in particular relates to a calcium sulfate opening master batch and a preparation method thereof. The calcium sulfate opening master batch contains the following components in percentage by mass: 89-91% of linear low-density polyethylene powder (LLDPE), 7.9-8.1% of a commercially available calcium sulfate opening agent, 0.09-0.11% of a composite antioxidant and 1.9-2.1% of paroline. The preparation method comprises the following steps: accurately weighing various components by an electronic scale, adding the components into a high-speed mixing machine, closing the upper cover of a stock bin, and mixing at a high speed for 1-3 minutes; feeding into a twin-screw extruder after mixing completion, fully plastifying the materials by virtue of the pressure and shear force produced by screw rotation, uniformly mixing, performing mouth model molding, performing cutting molding by a dicing cutter, dehumidifying by a cycloneseparator, and thus producing the finished product. According to the product disclosed by the invention, the frictional resistance in the film production process can be effectively reduced, vesicle breath is reduced, the opening performance of the product is excellent, the design expectation is met, and the film production is met.

Description

technical field [0001] The invention belongs to the field of agricultural film manufacture, and in particular relates to a calcium sulfate open masterbatch and a preparation method thereof. Background technique [0002] In the production process of plastic film, in order to prevent the film products from sticking together and opening is difficult, it is necessary to add a certain amount of opening masterbatch. There are many types of opening masterbatches on the market, including the use of opening agents such as oils, minerals, talcum powder, and silicon dioxide. When using oils, minerals, talcum powder, silicon dioxide, etc. as the production of opening masterbatch, the micropowder with large mesh size is generally selected. The common problem is that the high amount of micropowder added has a certain impact on the transparency of the film. Some anti-blocking agents have low density, and are easy to expand and break during production, resulting in low production efficienc...

AI Technical Summary

Problems solved by technology

Some anti-blocking agents have low density, easy to expand and break during production, and the production efficiency is low

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