Double-layer composite production method for plastic film sheet material on blowfilm machine and equipment thereof

Abstract

The invention relates to the field of fine chemical products, in particular to a producing method of double-layer composition of plastic film sheet on a plastic film blowing machine. The invention pertains to a plastic film sheet, the compositions of which are 5-65 percent of low density polyethylene and 95-35 percent of acetic acid. Difference of the producing method of the invention with the existing plastic film is that: the temperature of a die head of the plastic film blowing machine is 150 to 170 DEG C, which causes that the plastic film blown in drum shape can be directly compacted into bundles without cutting, namely, two layers of film are hot pressed into one layer. The invention has the advantages that: the tenderness of the plastic film is increased by changing the compoundingformula of the plastic film, and the viscidity of the film is also increased by enhancing the temperature of the die head; the originally separated two layers of film are closely compacted into a whole; due to the invention, the modification to the existing device is little, and the production cost is lowered. By using a small scale device for producing thick plastic film sheet, machine consumptions in production process can also be reduced and the cost is prevented from increasing due to the composing by glue and environment pollution.

Description

technical field [0001] The invention relates to the field of fine chemical products, in particular to a production method and equipment for double-layer compounding of plastic film sheets on a film blowing machine. Background technique [0002] Fig. 1 shows the schematic diagram of the principle structure of the existing blow molding machine, which is driven by the motor 1 through the gearbox 11 to move the screw 2, and the raw material enters the screw 2 from the hopper 21, and is heated by the heating device 3 and extruded by the screw 2. The raw material enters the die head 23 (the temperature in the die head is generally about 120 degrees) through the flange plate 22 (the filter screen can remove the impurities) to form a plastic film, blows it into a barrel shape through the wind plate 24, and passes through the herringbone frame 5 After being flattened, after passing through the traction roller 6 (generally composed of an iron roller and a rubber roller), it is guided ...

AI Technical Summary

Problems solved by technology

At present, the sealing film of the car door needs to be soft and has a thickness of 0.56mm. To produce a plastic film with a thickness of 0.56mm, a blow molding machine with a screw diameter of 120-130mm should be used to increase the amount of plastic extrusion. At the same time, various related The volume, power and strength of equipment such as gearboxes, motors, heating equipment, and screws must be doubled, resulting in high prices for the entire set of equipment, large footprints, and increased production costs. 7. The force increases, the blade wears seriously, the blade and the knife holder are easy to bend and break, and need to be replaced frequently. If the machine is stopped to replace the blade and knife holder, and the machine is restarted to adjust the parameters to normal production, 100 kg of waste products will usually be produced. If the machine is not stopped and replaced Knives require high technical level of workers, and waste products will be generated during tool change and blade adjustment, which directly increases production costs

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