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Preparation method and application of hydrophobic agent for packaging paper and cardboard

A hydrophobic agent and wrapping paper technology, applied in the field of coatings, can solve the problems of not being able to meet the surface moisture-proof treatment, affect the recycling of paper products, and large coating volume, and achieve the effect of good adhesion, less environmental pollution, and firm adhesion

Active Publication Date: 2016-03-16
江苏华衡工程材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the hydrophobic and moisture-proof agents for paper products sold on the market for surface modification are mainly made of polyolefin polymers and paraffin wax, and are applied by dipping, coating, spraying and other processes, and the coating is relatively thick , when the product is folded and curled, the coating will be damaged, recoating is difficult and the effect is poor; in addition, the coating amount is large, which is uneconomical and affects the recycling of paper products
The current commercially available hydrophobic agent and its coating process cannot meet the surface moisture-proof treatment of paper packaging products that require high adhesion performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of water-repellent agent for wrapping paper and cardboard, the steps are:

[0026] (1) Mixing: Take absolute ethanol: coupling agent: fumed silica in a weight ratio of 40: 2: 1 and mix them evenly in a container;

[0027] (2) Homogenization: Add 60% solvent by weight of the mixture to the mixture obtained in step (1), and after fully stirring and mixing with the solution, homogenize the obtained mixed solution on a homogenizer at a speed of 6000r / min for 15min. That is, the product hydrophobic agent is obtained.

[0028] The fumed silica is a specific surface area of ​​115m 2 / g, fineness 6000 mesh, surface-treated fumed silica using dimethyl silicone liquid, SiO 2 Content≥99.8%Wt. The coupling agent is KH550, that is, γ-aminopropyltriethoxysilane. The alcohol solvent is specifically: absolute ethanol.

Embodiment 2

[0030] The preparation method of water-repellent agent for wrapping paper and cardboard, the steps are:

[0031] (1) Mixing: Take anhydrous ethanol: coupling agent: fumed silica in a weight ratio of 40:7:3 and put them in a container to mix and stir evenly;

[0032] (2) Homogenization: Add 120% solvent by weight of the mixture to the mixture obtained in step (1), and after fully stirring and mixing with the solution, homogenize the obtained mixed solution on a homogenizer at a speed of 10000r / min for 6 minutes, That is, the product hydrophobic agent is obtained.

[0033] The fumed silica is a specific surface area of ​​115m 2 / g, fineness 6000 mesh, surface-treated fumed silica using dimethyl silicone liquid, SiO 2 Content≥99.8%Wt. The coupling agent is KH560, that is, γ-(2,3-glycidoxy)propyltrimethoxysilane. The alcohol solvent is specifically: isopropanol.

Embodiment 3

[0035] The preparation method of water-repellent agent for wrapping paper and cardboard, the steps are:

[0036] (1) Mixing: Take anhydrous ethanol: coupling agent: fumed silica in a weight ratio of 40:5:2 and mix them evenly in a container;

[0037] (2) Homogenization: Add 80% solvent by weight of the mixture to the mixture obtained in step (1), stir and mix with the solution thoroughly, then homogenize the obtained mixed solution on a homogenizer at a speed of 8000r / min for 10min, That is, the product hydrophobic agent is obtained.

[0038] The fumed silica is a specific surface area of ​​115m 2 / g, fineness 6000 mesh, surface-treated fumed silica using dimethyl silicone liquid, SiO 2 Content≥99.8%Wt. The coupling agent is A151, namely vinyltriethoxysilane. The alcohol solvent is specifically: butanol.

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Abstract

The invention relates to a preparation method of a water repellent agent for packaging paper and a paper board and application thereof and belongs to the technical field of paint. The preparation method comprises the following steps: firstly, placing absolute ethyl alcohol, a coupling agent and fumed silica in a glass container to uniformly mix and stir according to a certain proportion; then adding a solvent and after the solvent is sufficiently mixed with the solution obtained in the step 1, carrying out high-speed homogeneous dispersion of mixed solution on a homogenizer; in the using process of the prepared water repellent agent, regulating different proportions according to the requirements of application base materials. The water repellent agent can be coated, also can be sprayed, is convenient to apply and is rapid to form a film; after the surface of a coating is dry, the coating is dried for 30min at a temperature of 120 DEG C so as to obtain a paper packaging product with the surface water repellency. The water-repellent coating has high transparence and high water repellency; the paper board has low water absorption; the coating has a good adhesion force; the base material applied with the water repellent agent is coated with the water repellent agent.

Description

technical field [0001] The invention relates to a method for preparing a hydrophobic agent for wrapping paper and cardboard and its application, in particular to a method for preparing a hydrophobic agent for wrapping paper and cardboard with high efficiency and high adhesion performance, and belongs to the technical field of coatings. Background technique [0002] Since paper fibers have a large number of hydroxyl groups and are hydrophilic, paper packaging products are susceptible to moisture, which limits the application range and quality of paper packaging products. In order to adapt to the humid storage and transportation environment, people put forward the requirements of hydrophobic and moisture-proof for paper packaging products such as cartons and pulp molding. Hydrophobic and moisture-proof modification of paper packaging products can generally be obtained through two methods: internal pulp modification and surface modification. In contrast, the process applicatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/16
Inventor 张新昌杨娇龙沈定坤张哲源
Owner 江苏华衡工程材料有限公司
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