Process for manufacturing TPE (thermoplastic elastomer) type claw type screw cap from film coating iron

Abstract

The invention discloses a process for manufacturing a TPE (thermoplastic elastomer) type claw type screw cap from film coating iron. According to the process, firstly, special film coating iron with the thickness of 0.12 to 0.18 mm is selected in advance; then, the printing is performed at the front side of the special film coating iron; 140 to 170 DEG C baking is performed for 8 to 12 minutes; next, glazing coating is performed on the printing surface; the dry film weight is required to be 5 to 9g/m<2>; the baking is performed at 150 to 190 DEG C for 9 to 13 minutes; then, the iron sheet is subjected to cover punching to manufacture a material falling cover; after the adoption of the special film coating iron, the printing can be directly performed at one surface; the TPE glue particles or glue rings can be directly injected into the other side; the priming coating is not needed at the front side; the paint coating is not needed at the reverse side; the baking combustion energy sources can be saved; the discharge due to organic solvent combustion can also be reduced; the inner and outer bottom coating process is omitted; the natural gas energy source consumption is reduced; on the other hand, the coating work procedures are reduced, so that the consumption of the paint is greatly reduced; the corresponding volatilization and combustion organic solvent quantity is reduced.

Description

technical field [0001] The invention relates to the technical field of making twist-off caps, in particular to a process for making TPE 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