High-adhesion tape for cotton coating and preparation method thereof

By modifying the combination of raw materials such as acrylate-based glue and MDI prepolymer, high-adhesive tape was prepared, which solved the problem of insufficient initial adhesion and stickiness of cotton wrap tape in the prior art, and achieved rapid cotton wrapping and stabilize the effect of the envelope.

CN119177092BActive Publication Date: 2025-02-07GUANGZHOU HAOTE ADHESIVE MATERIAL CO LTD
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Patent Information

Application Number
CN202411697208.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-26
Publication Date
2025-02-07
Estimated Expiration
2044-11-26

AI Technical Summary

Technical Problem

The acrylate pressure-sensitive adhesive used in existing cotton wraps is difficult to meet the needs of large-volume and high-compression packaging, and its initial adhesion and holding adhesion are not enough to ensure the stability and efficiency of the cotton wraps.

Method used

Using modified acrylate-based glue as the substrate for high viscosity sensitive glue, the aldehyde imine compound is formed through the nucleophilic addition reaction of 4-trimethoxysilylbutyraldehyde and acrylamide, and copolymerize with the acrylate monomer to increase Cohesion of the glue layer. At the same time, MDI prepolymer, tackifying resin, filler, dispersion aid, defoaming agent and light stabilizer were added, and high-adhesive tape was prepared by vacuum defoaming and hot air drying.

Benefits of technology

The excellent initial and sticky force of high adhesive tape in cotton wrap is achieved, which improves the rapid wrapping efficiency of cotton, and enhances the stability and peeling strength of the wrapping, avoids the collapse of the wrapping.

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Abstract

The present invention relates to a high-adhesion tape for cotton coating and a preparation method thereof, and belongs to the technical field of pressure-sensitive adhesives. The tape is composed of a base film, a high-viscosity pressure-sensitive adhesive adhered to the base film, and a release film attached to the surface, and the high-viscosity pressure-sensitive adhesive includes, by weight, 100 parts of modified acrylate-based adhesive, 14-20 parts of MDI prepolymer, 9-12 parts of tackifying resin, 4.5-6 parts of filler, 1-1.3 parts of dispersing aid, 0.7-0.9 parts of defoamer, and 0.12-0.15 parts of light stabilizer; the high-viscosity pressure-sensitive adhesive uses modified acrylate-based adhesive as a substrate, and is formed by a nucleophilic addition reaction of 4-trimethoxysilyl butyraldehyde and acrylamide, and then copolymerized with an acrylate monomer; the high-viscosity pressure-sensitive adhesive has excellent initial adhesion, can realize rapid coating of cotton, improve production efficiency, and maintain a high holding force and peel strength, which is beneficial to the stability of cotton coating, and avoids bag collapse during packaging and transportation.
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Citation Information

Patent Citations

  • Moisture absorption curing type acrylate pressure-sensitive adhesive and preparation method thereof

    CN111363504A

  • Aldimine containing glass bonding primer

    US20190367661A1