Process of manufacturing PVC (polyvinyl chloride) type claw type screw cap from film coating iron

Abstract

The invention discloses a process of manufacturing a PVC (polyvinyl chloride) type claw type screw cap from film coating iron. The process comprises the following concrete steps of selecting PET film coating iron with the thickness being 0.12 to 0.18mm in advance; performing printing at the front side of the double-side PET film coating iron; then, performing glazing coating on the printing surface; next, performing inner coating at the back side of the double-side PET film coating iron. An organic solvent is not used in the production process, the environment-friendly effect is achieved; the film coating iron is used for manufacturing the PVC type claw type screw cap; on one hand, the inner and outer bottom coating process is omitted; the natural gas energy source consumption is reduced; the consumption of paint is greatly reduced through the coating work procedure reduction; the corresponding volatilization and combustion organic solvent quantity is also reduced; the discharge quantity of the organic solvents into the environment can be directly reduced; the film coating iron process has the advantages that the film attachment force, the toughness, the anti-corrosion performance, the deep impact-resistant performance are superior to those of the conventional paint iron; the quality problem of the conventional paint iron due to levelling property, needle holes and the like in the coating process can be solved.

Description

technical field [0001] The invention relates to the technical field of making twist-off caps, in particular to a process for making PVC claw-type twist-off caps with peritoneal iron. Background technique [0002] As one of the important branches of the metal packaging industry, the claw-type twist-off lid product is favored by the fruit, vegetable, condiment, meat and poultry food canning industry due to its low cost, good sealing performance, high temperature resistance and cooking resistance. However, the traditional claw-type twist-off cap is a reprocessing technology for painted iron products. On the one hand, the production process of the traditional claw-type twist-off cap requires multiple coatings on the front and back of the tinplate, resulting in a large amount of organic solvent volatilization. Oven incineration technology, but there is still the problem that the large amount of incineration leads to the emission of some incompletely burned organic solvents; at th...

AI Technical Summary

Problems solved by technology

However, the traditional claw-type twist-off cap is a reprocessing technology for painted iron products. On the one hand, the production process of the traditional claw-type twist-off cap requires multiple coatings on the front and back of the tinplate, resulting in a large amount of organic solvent volatilization. Oven incineration technology, but there is still the problem that the large amount of incineration leads to the emission of some incompletely burned organic solvents; at the same time, the curing of the coating film requires the burning of a large amount of natural gas, resulting in high energy consumption; moreover, the corrosion resistance of the product depends on tinplate The surface is coated with a cured coating, and the slight unevenness of these coatings easily leads to a lack of corrosion resistance; these are largely unable to fully meet the diverse needs of the market