Polyethylene film modifying device

Abstract

The invention discloses a polyethylene film modifying device, which comprises an unwinding device, a front traction device, an electronic beam radiation device, a back traction device, a winding device and a control device in sequence, wherein the control device is used for controlling each device and receiving signals fed back by each device; the unwinding device and the winding device are used for conveying and receiving a polyethylene film respectively; the front and back traction devices are used for leading the conveying of the polyethylene film; and the electronic beam radiating device is used for radiating the polyethylene film passing through the electronic radiating device to modify the polyethylene film. Due to the adoption of the polyethylene film modifying device provide by the invention, the time of radiation crosslinking modification can be shortened; and the radiating high pressure of an electronic accelerator is adjusted for changing the radiation penetration depth, so that half crosslinking modification or gradient crosslinking modification of the polyethylene film is realized.

Description

technical field [0001] The invention relates to the technical field of material modification, in particular to a polyethylene film modification device. Background technique [0002] Polyethylene film is used as the innermost layer (heat seal layer) in the multilayer structure of flexible packaging, and acts as a support layer in some stand-up pouches. Due to its low tensile strength (tensile strength) and easy deformation, it needs Larger thickness (30-70 microns) can meet the requirements of processing and packaging; in this way, polyethylene accounts for more than 40% of the total weight of flexible packaging, thickness accounts for 40-60%, and the cost accounts for about 50% of the total cost of the composite film. [0003] In order to improve the tensile strength of low-density polyethylene (LDPE) and reduce the thickness and dosage of polyethylene film, modified polyethylene resin is generally used in the world to produce polyethylene film, with LDPE as the main materia...

AI Technical Summary

Problems solved by technology

Domestic low-energy electron accelerators generally adopt a scanning structure. The electron accelerators with this structure are large in size, low in efficiency, and slow in speed. Shielding devices need to be added

Electronic curtain electron accelerators have been applied in developed countries such as the United States and Japan, but only in a small number of foreign-owned and joint ventures in China, all of which are manufactured abroad, and the voltage and current intensity of existing products cannot be continuously adjusted. , can not realize the controllable cross-linking modification of polyethylene film

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