Down blow type membrane foam internal spray coating functional liquid coating technology and device

Abstract

A blowing down type technology and apparatus for spraying function liquid onto inner surface of film bulb features that a blowing-down head can blowa film bulb which is then wound on a reel,andthe function liquid is directly filled in the film bulb for coatingit on the inner surface of film bulb. Its advantages are high adhesion, uniformity and transparency, and long service life.

Description

technical field [0001] The invention belongs to an object surface coating process, in particular to a down-blown film bubble internal spraying functional liquid coating process and device. Background technique [0002] At present, the processing of functional films at home and abroad adopts the production process of multi-layer co-extrusion blow molding units, that is, the masterbatch containing functional substances and polyethylene masterbatch are combined into a multilayer film at a high temperature of about 200 ° C. However, the functional substances are easy to decompose and volatilize at high temperature, and the functional substances contained in the film are not easy to release, which greatly reduces the functionality of the film. [0003] In the 1990s, the agricultural mulch coating process appeared. The functional agent was sprayed evenly and simply on the mulch through a spray device. Although this process achieves uniform spraying on the surface of the film, the...

AI Technical Summary

Problems solved by technology

Although this process achieves uniform spraying on the surface of the film, the physical and chemical properties of the functional agent and the polyethylene film are quite different. The distribution of active agents is extremely uneven, and the adhesion is poor, which reduces its functionality and service life, and its transparency is very poor. It cannot be popularized and applied, and it cannot meet the needs of large-scale production and agricultural greenhouse film production.

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