Non-woven fabric bag with long-acting insect repellent function and preparation method thereof

By using a composite emulsion with natural peppermint oil and paraffin wax as a slow-release matrix in nonwoven fabric, a physical barrier type slow-release system is constructed, which solves the problems of easy loss and poor durability of insect repellent ingredients in nonwoven fabric, and achieves long-lasting insect repellency and coating stability.

CN122169364APending Publication Date: 2026-06-09ANHUI BUDAIWANG ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ANHUI BUDAIWANG ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
Filing Date
2026-04-13
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing nonwoven fabrics lack a slow-release mechanism for insect-repellent ingredients, are prone to loss, have poor durability, have high energy consumption in the overall soaking process, low utilization rate of functional ingredients, and are not environmentally friendly.

Method used

Using natural peppermint essential oil as the core insect repellent ingredient, combined with food-grade paraffin and microcrystalline wax as the slow-release matrix, a stable oil-in-water emulsion is constructed through a complex emulsifier, and polyvinyl alcohol is used as a film-forming agent, supplemented with sodium carboxymethyl cellulose to enhance stability. Trace amounts of BHA antioxidant and ultraviolet absorber are added to construct a physical barrier type slow-release system.

Benefits of technology

This achieves long-lasting insect-repellent effect and improves the mechanical strength of the coating, reduces the evaporation rate of essential oils, ensures the persistence of insect-repellent effect and uniform adhesion of the coating, and reduces production costs.

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Abstract

This invention provides a nonwoven bag with long-lasting insect-repellent function, comprising: 8-12% natural peppermint essential oil, 15-20% food-grade paraffin wax, 3-5% microcrystalline wax, 3-5% composite emulsifier, 4-6% polyvinyl alcohol, 0.5-1.5% sodium carboxymethyl cellulose, 0.05-0.1% trace BHA antioxidant, and 0.3-0.8% ultraviolet absorber. This invention provides a nonwoven bag with long-lasting insect-repellent function and its preparation method. It utilizes natural peppermint essential oil as the core insect-repellent component, food-grade paraffin wax and microcrystalline wax as the slow-release matrix, forming an active functional system. A stable oil-in-water emulsion is constructed using a composite emulsifier, and polyvinyl alcohol is used as the main film-forming agent. Sodium carboxymethyl cellulose is added to enhance stability, and trace amounts of BHA antioxidant and ultraviolet absorber are added to ensure long-lasting performance. This constructs a physical barrier type slow-release system, overcoming the defects of single coatings such as easy volatility, weak adhesion, and short duration of action, thus improving the durability of the insect-repellent function and the mechanical strength of the coating.
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