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Method for manufacturing shape memory anti-counterfeiting label

A technology of anti-counterfeiting marks and production methods, which is applied to instruments, identification devices, seals, etc., can solve problems such as complex processes, and achieve the effects of saving costs and simplifying manufacturing processes

Inactive Publication Date: 2012-05-23
GUANGZHOU MANBORUI MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is more complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Using a single-screw sheet extruder, the surface of the roller of the sheet extruder is set with multiple identical patterns or groups of identical characters. These identical patterns or characters have a certain distance from each other. These identical patterns Or the text is raised or lowered. Using such a sheet extruder unit, polymer materials with shape memory properties, such as norbornene, trans polyisoprene, polyurethane, styrene-butadiene copolymer, polyethylene, etc., are exchanged with peroxide. Cross-linking process or one-step silane cross-linking process, cross-linking in the barrel of the extruder, and extruding into a sheet with concave-convex patterns or characters on the surface corresponding to the roller, the thickness of the sheet is 0.1-2mm, and the thickness of the sheet is 0.3- 0.5mm is better. Then heat the above-mentioned cross-linked sheet, then use a two-roll or three-roll calender to flatten the concave-convex pattern or characters on the ...

Embodiment 2

[0011] Polymer materials with shape memory function, such as norbornene, trans-polyisoprene, polyurethane, styrene-butadiene copolymer, ethylene-vinyl acetate polymer, polyethylene, etc., are cross-linked with peroxide Process or one-step silane crosslinking process, crosslink these materials in the barrel of the injection molding machine, and then use the mold to directly form concave-convex patterns (text) on the surface of the injection molded product. When the injection molded product is heated above its deformation temperature, the pattern (text) formed on its surface is pressed into other patterns (text), or pressed into a plane, and then these products are heated above its deformation temperature. Injection molding The formed concave-convex pattern (character) will reappear.

Embodiment 3

[0013] Use peroxide cross-linking process or one-step silane cross-linking process to cross-link polymer materials with shape memory function such as norbornene, trans polyisoprene, polyurethane, styrene-butadiene copolymer , ethylene-vinyl acetate polymer, polyethylene and other polymer materials with shape memory functions are extruded into flat sheets, and the sheets are cut into the required specifications according to the size of the hot-pressing mold, and then the sheets are put into the hot-pressing mold In the process, a concave-convex pattern (character) is hot-pressed on the surface of the sheet. The thickness of the sheet with concavo-convex patterns (characters) is 0.1-2.0mm. The thickness of the planar sheet is 0.1-2.0 mm. When it is necessary to check the authenticity of the product, put the small pieces into boiling water or heat them in other ways, and these small pieces will return to flat sheets, which will play the role of anti-counterfeiting.

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Abstract

The invention relates to a method for manufacturing a shape memory anti-counterfeiting label, which is characterized by comprising the following steps of: performing cross-linking, extrusion or injection molding on a high polymer material with a shape memory function in a charging barrel of an extruder or an injection molding machine by a peroxide cross-linking process or one-step silane cross-linking process to make a product directly have the memory function, wherein an extruded sheet can be a plane sheet and can also be a sheet with concave-convex patterns and characters on the surface; and heating the cross-linked sheet to over the deformation temperature thereof, pressing the patterns or characters on the plane sheet, or pressing the sheet with the concave-convex patterns or characters into a plane or other patterns and characters, and cutting the sheet into slices, wherein each slice contains one pattern or a group of characters. Sheet molding (or injection molding) and chemicalcross-linking are performed simultaneously, so a manufacturing process is simplified and cost is saved.

Description

technical field [0001] The invention relates to a manufacturing method, in particular to a manufacturing method of a shape memory anti-counterfeiting mark. Background technique [0002] The Chinese patent application (patent application number 201010125727.4) discloses the name "a method for making a shape memory anti-counterfeiting label". Anti-counterfeiting on wine bottle caps and other objects. The process steps are as follows: firstly, the polymer material with shape memory function is made into a plate with a concave-convex pattern on the surface, and then the above-mentioned plate is irradiated and cross-linked. The process is more complicated. Contents of the invention [0003] The object of the present invention is to provide a method for making a shape memory anti-counterfeit label by combining the two processes of making a sheet and crosslinking a polymer material with a shape memory function into one, simplifying the manufacturing process and saving costs . ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09F3/02C08J3/24B29C45/10B29C47/00B29C48/08
CPCC08G2280/00B29C47/0021C08J3/24B29C47/0061G09F3/0292B29C47/0066B29C47/0069B29C35/02B29C45/0001B29C48/08B29C48/002B29C48/0022B29C48/0023
Inventor 章中群章一叶柯丽兰
Owner GUANGZHOU MANBORUI MATERIAL TECH
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