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Non-primer coating method for self-adhesive polyvinylidene chloride emulsion and coating system for implementing non-primer coating method

A technology of polyvinylidene chloride and coating method, which is applied in the field of coating system, can solve problems such as film shrinkage deformation, adhesion, tension and film difficulty, and achieve the effect of good uniformity and improved adhesion

Active Publication Date: 2013-04-03
HAINAN SHINER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the self-adhesive PVDC emulsion has a certain viscosity, it is easy to appear sticky rollers or adhesion between film coating surfaces during the coating process, which will affect the appearance, quality and other physical and mechanical properties of the coating film such as barrier properties, adverse effect on mechanical properties
It will also make it difficult to control the tension and film movement during the coating process, resulting in obvious shrinkage and deformation of the film after being heated in an oven. In addition, it is also difficult to control the amount of emulsion coating.

Method used

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  • Non-primer coating method for self-adhesive polyvinylidene chloride emulsion and coating system for implementing non-primer coating method

Examples

Experimental program
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Effect test

Embodiment 1

[0023] 1. Unwinding process: Under a constant unwinding tension of 15N, the BOPP reel-shaped film with a thickness of 19 μm is flatly unwound into a continuous and stable operation;

[0024] 2. Corona treatment process: the corona treatment power is set to 6.0kW, and the corona value of the base film after treatment reaches 41dyn / cm;

[0025] 3. Top coating process: The corona-treated film enters the top coating process, adopts reverse gravure coating, and through the cooperation of the coating roller and the scraper, the PVDC emulsion of the top coating is transferred from the trough to the surface of the film through the coating roller. The coating process is transferred to the surface of the film through the coating roller and the coating is controlled at 2.5g / m 2 , the coating thickness is 2 μm, and the tension of the coating film is controlled at 80N; wherein wax emulsion and silicon dioxide anti-adhesive agent are added to the oxygen-resistant PVDC emulsion of the top co...

Embodiment 2

[0029] 1. Unwinding process: Under a constant unwinding tension of 30N, the BOPET reel-shaped film with a thickness of 12 μm is flatly unrolled into a continuous and stable operation;

[0030] 2. Corona treatment process: the corona treatment power is set to 6kW, and the corona value of the treated base film reaches 41dyn / cm;

[0031]3. Top coating process: the coating film after primer coating enters the top coating process, adopts reverse gravure coating, and through the cooperation of coating roller and scraper, the top coating PVDC emulsion is transferred from the trough to the film through the coating roller The surface, where the coating process is transferred to the film surface by the coating roller, the coating is controlled at 3.0g / m 2 , the thickness of the coating is 2 μm, and the tension of the coating film is controlled at 80N; wherein wax emulsion and silicon dioxide anti-sticking agent are added to the oxygen-resistant PVDC emulsion of the top coating; the comb...

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Abstract

The invention provides a non-primer coating method for a self-adhesive polyvinylidene chloride (PVDC) emulsion and a coating system for implementing the method. Kiss type coating is adopted for top coating, and an appropriate quantity of wax emulsion and silicon dioxide anti-sticking agent are added into the top coating self-adhesive PVDC emulsion in a top coating process, so that an obtained coating film has the characteristics of high resistance and high heat-sealing property and can compound with a carton through an UV (Ultraviolet) adhesive; the surface of the coating film is smooth, so that the film can easily move on equipment without greater tension; and the film is not subjected to remarkable contraction deformation after being heated through a baking oven, so the product performance is not influenced.

Description

technical field [0001] The invention relates to a primerless coating method of self-adhesive polyvinylidene chloride emulsion and a coating system for implementing the method. Background technique [0002] In the plastic coating industry, before coating functional coatings, it is necessary to apply a layer of primer to enhance the adhesion between the coating and the plastic substrate film. When producing barrier coating films, PVDC coatings with very good oxygen barrier properties on the market are selected, and the primer layer must be used to make the PVDC coatings firmly adhere to the plastic film. [0003] Patent CN03263561 relates to the reverse (reverse) gravure roller kiss coating device of the coating machine, which is composed of a support plate, a transmission gear, a pressure roller, a cooling roller, a coating roller, and a regulating roller. Among them, the pressure roller, the cooling roller, the coating The two ends of the roller are installed on the support...

Claims

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Application Information

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IPC IPC(8): B05D7/04B05D3/14B05C9/10B05C13/02
Inventor 杨强符师林鹏
Owner HAINAN SHINER IND
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