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A kind of BOPP thin film for precision printing and preparation method thereof

A thin film and precise technology, applied in the field of precision printed BOPP film and its preparation, can solve the problems of poor precision printing recognition effect, poor ink adhesion, poor surface tension, etc., to increase the burden of equipment, reduce printing recognition confusion, slow down The effect of surface tension decay

Active Publication Date: 2020-06-02
GUANGDONG WEIFU PACKAGING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In barcode precision printing, the surface paper is the carrier of the label printing content. The commonly used surface paper in the market mainly includes copper paper, thermal paper, PET, PVC, etc. according to its material. The application of barcode printing with BOPP film as the surface paper is subject to PP itself has non-polar material properties and its surface tension is poorer than other materials, resulting in poor ink adhesion and poor precision printing recognition effect, which hinders its promotion

Method used

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  • A kind of BOPP thin film for precision printing and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A BOPP film for precision printing, the film is composed of a modified functional layer, a transparent surface layer, a supporting core layer and a transparent surface layer by four-layer co-extrusion, and the ratio of each layer is: 2:1.5:5: 1.5. The raw material ratio of each layer is as follows: modified functional layer: 91% copolymerized polypropylene, 5% special modified material, 2% anti-blocking agent, 2% antioxidant; supporting core layer: homopolymerized polypropylene 85% %, stiffening agent 5%, antistatic agent 5%, slip agent 5%; transparent surface layer: polypropylene copolymer 75%, slip agent 10%, anti-blocking agent 10%, antioxidant 5%.

[0024] Further, the special modified material is prepared by mixing pp grafted acrylic acid and pp grafted maleic anhydride, and the mixing ratio is 1:1.

[0025] Furthermore, the cleanliness and isotacticity of the copolymerized polypropylene and homopolypropylene raw materials in each layer are above 99%.

[0026] Fur...

Embodiment 2

[0029] A BOPP film for precision printing, the film is composed of a modified functional layer, a transparent surface layer, a supporting core layer and a transparent surface layer by four-layer co-extrusion, and the ratio of each layer is: 2:1.5:5: 1.5. The raw material ratio of each layer is as follows: modified functional layer: 96% copolymerized polypropylene, 2% special modified material, 1% anti-blocking agent, 1% antioxidant; supporting core layer: homopolymerized polypropylene 92% %, stiffening agent 3%, antistatic agent 2%, slip agent 3%; transparent surface layer: polypropylene copolymer 88%, slip agent 4%, anti-blocking agent 5%, antioxidant 3%.

[0030] Further, the special modified material is prepared by mixing pp grafted acrylic acid and pp grafted maleic anhydride, and the mixing ratio is 1:1.

[0031] Furthermore, the cleanliness and isotacticity of the copolymerized polypropylene and homopolypropylene raw materials in each layer are above 99%.

[0032] Furth...

Embodiment 3

[0035] A kind of preparation method for the BOPP film of precision printing in any example in embodiment 1, 2, described method comprises the following steps:

[0036] (1) According to the formula searched in claim 1, the raw materials of each layer are weighed according to the proportion, and then added to the respective screw extruders after uniform mixing and drying treatment, and the materials are melted and plasticized in the screw extruders;

[0037] (2) After the material is melted and plasticized, the four-layer polymer melt is filtered through a filter, and then merged and extruded at the die head, followed by cooling, casting, longitudinal and transverse stretching and corona treatment in sequence, so that the layers , After corona treatment, the surface tension of the modified functional layer of the film reaches 50-55 dynes;

[0038] (3) Finally, the film is automatically wound and aged in sequence, and then cut into the specifications required by customers to obta...

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Abstract

The invention discloses a BOPP thin film used for precise printing and a preparing method of the thin film. The thin film is formed by compositing of a modified function layer, a transparent surface layer, a supporting core layer and a transverse surface layer in a four-layer co-extrusion manner, and the proportion of all layers if 2:1.5:5:1.5, according to the raw material ratio of all layers ofthe thin film, the modified function layer comprises 91 to 96% of co-polypropylene, 2 to 5% of a special modified material, 1 to 2% of an anti-adhesion agent and 1 to 2% of an antioxidant, the supporting core layer comprises 85 to 92% of homo-polypropylene, 3 to 5% of a stiffness agent, 2 to 5% of an antistatic agent, and 3 to 5% of a slipping agent, and the transparent surface layer comprises 75to 88% of co-polypropylene, 4 to 10% of a slipping agent, 5 to 10% of anti-adhesion agent and 3 to 5% of an antioxidant. Through modifying and blending of raw materials and the corresponding adjustment of the process, all layers can be supplemented, on the premise of ensuring that the BOPP thin film has the intrinsic physical property, surface tension of one side of the thin film function layer can be effectively enhanced, the attenuation velocity is reduced, the ink attaching force and coloring force can be improved, and the performance of precise printing is met.

Description

technical field [0001] The invention belongs to the technical field of BOPP film processing, and in particular relates to a BOPP film used for precision printing and a preparation method thereof. Background technique [0002] PP materials are highly adaptable to processing, and have excellent optical properties, material tensile properties and thermal stability. Diversified product types are becoming more and more popular in food packaging. It is favored by processing manufacturers such as daily necessities packaging. In recent years, BOPP manufacturers have gradually paid attention to high-tech fields such as barcode precision printing. [0003] In barcode precision printing, the surface paper is the carrier of the label printing content. The commonly used surface paper in the market mainly includes copper paper, thermal paper, PET, PVC, etc. according to its material. The application of barcode printing with BOPP film as the surface paper is subject to PP itself has non-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D7/01B32B27/06B32B27/32B32B27/18B32B27/16B41M5/50C08L23/14C08L51/06C08L23/12C08L83/04C08J5/18
CPCB29D7/01B32B27/08B32B27/16B32B27/18B32B27/32B41M5/502C08J5/18C08J2323/12C08J2323/14C08J2451/06C08J2483/04C08L23/12C08L23/14C08L2203/16C08L2205/025C08L2205/03C08L51/06C08L83/04
Inventor 梁雁扬邱镇贤
Owner GUANGDONG WEIFU PACKAGING MATERIAL
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