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Mildew-proof water-resistant seedling pulp molded product and preparation method and application thereof

A technology of pulp molding and products, applied in the fields of application, non-woody plant/crop pulp, synthetic cellulose/non-cellulose material pulp/paper, etc., can solve the problem of affecting the quality of seedlings, prone to mildew, and soft seedling cups and other problems, to achieve good anti-mildew effect, easy to degrade, and reduce the effect of ecological environment pressure

Active Publication Date: 2019-07-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when pulp molding is used instead of PE plastic to raise seedlings, two problems are prone to occur: one is that when watering, the pulp molding absorbs more water, and the seedling cup becomes soft and does not have enough strength; the other is during the seedling cultivation period. , prone to mildew, affecting the quality of seedlings

Method used

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  • Mildew-proof water-resistant seedling pulp molded product and preparation method and application thereof
  • Mildew-proof water-resistant seedling pulp molded product and preparation method and application thereof
  • Mildew-proof water-resistant seedling pulp molded product and preparation method and application thereof

Examples

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preparation example Construction

[0049] The modified polyvinyl alcohol fibers used in the examples of the present application are prepared by the following method:

[0050] Add 150mL of distilled water, 8g of polyvinyl alcohol fibers and 40mL of glycidyl methacrylate into a three-neck flask, adjust to acidity, and then stir to obtain a uniformly dispersed polyvinyl alcohol fiber suspension. Then add 30 mL of acid cerium ammonium nitrate (CAN) solution with a solid content of 1% to the system, and react in a constant temperature water bath at 40° C. for 3 h. The product is filtered, washed, extracted with acetone to remove the homopolymer on the surface of the fiber, and dried in vacuum at 40°C to constant weight to obtain the modified polyvinyl alcohol fiber.

Embodiment 1

[0052] 1. Add 10g of montmorillonite to 2 times the mass of water to dissolve, add 1g of 2-methyl-4-isothiazolin-3-one and 1g of 2-methyl-5-chloro-4-isothiazolin under stirring conditions imidazol-3-one and 4g tea polyphenols to obtain a mixed solution, the mixed solution was concentrated in vacuum (50°C), and freeze-dried (at a temperature of -30°C, for 2 hours, to completely remove water), to obtain a fungicide;

[0053] 2. Mix 0.16g of antifungal agent with 8g of disintegrated and dispersed natural bamboo pulp (absolutely dry) beaten to 28°SR, 0.08g of modified polyvinyl alcohol fiber (water melting temperature 90°C) and 0.04g of PAE wet strength agent Mixing, and finally hot pressing (temperature 160°C, time 60s) to obtain a dry blank of pulp molded product after shaping and trimming;

[0054]3. Evenly coat 8.4g (the 8.4g spray liquid contains 8g distilled water, 0.24g cationic starch and 0.16g polyvinyl alcohol) spray solution on the surface of the dry base of the pulp pl...

Embodiment 2

[0056] 1. Add 10g of montmorillonite to 2.5 times of water to dissolve, add 1.5g of 2-methyl-4-isothiazolin-3-one, 1.5g of 2-methyl-5-chloro-4-iso Thiimidazol-3-one and 4.5g tea polyphenols to obtain a mixed solution, the mixed solution was concentrated in vacuo (60°C), freeze-dried (at a temperature of -25°C, for 3 hours, to completely remove water), and an antifungal agent was obtained;

[0057] 2. Mix 0.24g of antifungal agent with 8g of disintegrated and dispersed natural bamboo pulp (absolutely dry) beaten to 29°SR, 0.16g of modified polyvinyl alcohol fiber (water melting temperature 80°C) and 0.08g of PAE wet strength agent Mixing, and finally hot pressing (temperature 170°C, time 90s) to obtain a dry blank of pulp molded product after shaping and trimming;

[0058] 3. Evenly coat 8.48g (containing 8g distilled water, 0.32g cationic starch and 0.16g polyvinyl alcohol in the 8.48g spray liquid) on the surface of the dry base of the pulp plastic product, and dry it (at a t...

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Abstract

The invention discloses a mildew-proof water-resistant seedling pulp molded product and a preparation method and application thereof. The mildew-proof water-resistant seedling pulp molded product comprises the following components in parts by mass: 2-5 parts of a mildew-proof agent, 3-5 parts of cationic starch, 1-3 parts of polyvinyl alcohol, 0.5-1.5 parts of a wet strength agent, 1-3 parts of modified polyvinyl alcohol fibers, and 100 parts of a bamboo pulp. The preparation method is as follows: (1) uniformly mixing the mildew-proof agent, the bamboo pulp and the wet strength agent, and thenperforming hot-pressing forming and edge cutting to obtain a pulp molded product dry body; and (2) uniformly coating a spraying solution on the surface of the pulp molded product dry body, and performing drying to obtain the mildew-proof water-resistant seedling pulp molded product. The preparation method of the water-resistant mildew-proof seedling pulp molded product is green and environment-friendly, the product is easy to degrade, the white pollution problem brought by plastic products is effectively solved, the pressure of the ecological environment is reduced, the mildew-proof and water-resistant effects are remarkable, and thus the product can be used for material packaging and agricultural cultivation seedling cups, and has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to a mildew-proof and water-resistant seedling-raising pulp molded product as well as a preparation method and application thereof. Background technique [0002] In July 2017, the General Office of the State Council issued the "Implementation Plan on Prohibiting the Entry of Foreign Garbage and Promoting the Reform of the Solid Waste Import Management System", requiring a comprehensive ban on the entry of "foreign garbage" including waste plastics and unsorted waste paper. The seedling cups currently used by agricultural cultivation companies are PE plastic products. Coupled with the implementation of the ban on plastics, it is urgent to replace the original plastic products with new degradable materials. [0003] Pulp molding is based on a certain concentration of primary fiber or secondary fiber pulp and an appropriate amount of chemical additives. Using a ...

Claims

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Application Information

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IPC IPC(8): D21H11/12D21H13/16D21J3/00D21H17/29D21H17/36D21H19/12D21H21/20D21H21/36A01G9/029
CPCA01G9/029D21H11/12D21H13/16D21H17/29D21H17/36D21H19/12D21H21/20D21H21/36D21J3/00
Inventor 杨仁党谢俊贤陈俊君
Owner SOUTH CHINA UNIV OF TECH
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