Die orifice-lubricating and anti-adhesion master batch, and production process thereof

Abstract

The present invention discloses a die orifice-lubricating and anti-adhesion master batch, and a production process thereof. A purpose of the present invention is to provide a master batch, which has the function of the conventional master batch adopted as a processing assistant agent, and the function of equipment protecting. The master batch provided by the present invention comprises the following components: 46-78 parts of polypropylene, 3-5 parts of micro glass beads, 2-5 parts of synthetic silica, 1.5-5.5 parts of a surface treatment agent, 8-12 parts of methyl methacrylate, 0.4-0.8 parts of a dispersing agent and 1.5-2.8 parts of a coupling agent. The method comprises: preparing the materials through a precision weighing system; mixing the materials, and then extruding the melt through a twin screw extruder; carrying out treatments of drying, cooling and pelletizing for the resulting melt to produce the master batch finished product. According to the present invention, the produced master batch has the function of the conventional master batch adopted as the processing assistant agent, and can protect the equipment; with the produced master batch, the shear strength of the resin can be reduced, the dynamic protection and lubrication layer can be formed on a surface layer of the die and a surface layer of the die head, the scale on the die orifice and the carbonized material inside the equipment are eliminated, the sharkskin fracture and the surface scarification due to layer hanging are improved.

Description

technical field [0001] The invention belongs to a masterbatch for plastic films, in particular to a die lubricating and antisticking masterbatch and a production process thereof. Background technique [0002] BOPP is a very important flexible packaging material. Due to its colorless, odorless, tasteless, non-toxic characteristics, high tensile strength, high impact strength, high toughness, and excellent optical properties, it is widely used in the packaging field. It is widely used, and its market is also expanding. In 2007, the output of BOPP film in my country reached 2 million tons per year. At the end of 2008, more than 20 BOPP film production lines will be put into production. In the future, the annual output of BOPP film will reach 250~300 tons. 10,000 tons / year. [0003] In the actual production process, the high-strength shearing of the resin will cause damage to the resin and equipment, and after a long time of use, the die deposits and carbonized materials in the ...

AI Technical Summary

Problems solved by technology

[0003] In the actual production process, the high-strength shearing of the resin will cause damage to the resin and equipment, and after a long time of use, the die deposits and carbonized materials in the machine will accumulate in the pipes and internal screws, causing blockage, and the machine must be cleaned regularly , causing delays in production

[0004] Most functional masterbatch additives are only aimed at products to improve the performance of the film, but there is no masterbatch that can be used for film production and protect equipment