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Micronized plant fiber buffer material and preparation method thereof

A plant fiber and cushioning material technology, applied in the field of packaging cushioning materials, can solve the problems of uneven distribution, high cost, unsatisfactory foaming effect of foaming process, etc., to improve structural strength and cushioning performance, and the ability to absorb external energy Good, good sample forming effect

Active Publication Date: 2014-10-15
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The combination of raw materials in this method is relatively complicated, and the cost is slightly higher than that of a single slurry; more additives are used in the preparation process, and the foaming effect of the foaming process used for plant fibers is not ideal
[0006] To sum up, plant fiber foam cushioning materials already have a certain research foundation at home and abroad, and have great development potential, but there are also some key problems that limit their large-scale production and use.
These problems mainly include two aspects. One is that plant fiber and starch have a wide range of sources, and the properties of different raw materials are also different, which makes the mixture system to be foamed uncertain, which in turn leads to a low bubble nucleation rate during the molding process. The distribution is very uneven; the second is that the buffer material is an open-pore spatial structure with a large specific surface area, and both plant fibers and starch have strong hydrophilicity, so the material is easy to absorb moisture and soften in an environment with high humidity. Performance is greatly affected

Method used

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  • Micronized plant fiber buffer material and preparation method thereof
  • Micronized plant fiber buffer material and preparation method thereof

Examples

Experimental program
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Effect test

example 1

[0025] Example 1, the preparation process is as follows:

[0026] (1) Take 30g of bagasse bleached pulp calculated as dry pulp, add 500g of water to soak for 4.5h under normal temperature conditions, dissociate the pulp for 10min through a disintegrator, and dehydrate it by suction to a pulp concentration of 20%; then weigh the mass of the pulp , add water to dilute to a pulp concentration of 10%; then use a PFI mill to beat the slurry with a pulp concentration of 10% to obtain micronized plant fibers with a beating degree of 73°SR.

[0027] (2) Dissolve 9.2g of cationic starch and 1.5g of polyvinyl alcohol in 200g of water, gelatinize at 90°C for 30 minutes, and cool to room temperature to obtain gelatinized cationic starch and polyvinyl alcohol.

[0028] (3) Add 20.8g of micronized plant fiber and 0.5g of magnesium stearate into the above cationic starch and polyvinyl alcohol gelatin and stir evenly; then add 9.0g of NaHCO 3 , mix well and let stand for 2 minutes, pour into...

example 2

[0030] Example 2, the preparation process is as follows:

[0031] (1) Take 30g of bagasse bleached pulp calculated as absolute dry pulp, add 500g of water to soak for 4.5h at room temperature, dissociate the pulp for 10min through a disintegrator, and dehydrate it by suction to a pulp concentration of 30%; then weigh the mass of the pulp , add water to dilute to a pulp concentration of 10%; then use a PFI mill to beat the slurry with a pulp concentration of 10% to obtain micronized plant fibers with a beating degree of 75°SR.

[0032] (2) Dissolve 6.0 g of cationic starch and 1.5 g of polyvinyl alcohol in 220 g of water, gelatinize at 90°C for 26 minutes, and cool to room temperature to obtain gelatinized cationic starch and polyvinyl alcohol.

[0033] (3) Add 24.0g of micronized plant fiber and 1.0g of magnesium stearate into the gelatinized cationic starch and polyvinyl alcohol in the previous step and stir evenly; then add 11.0g of NaHCO 3 , mix well and let stand for 2 mi...

example 3

[0035] Example 3, the preparation process is as follows:

[0036] (1) Take 30g of bagasse bleached pulp calculated as absolute dry pulp, add 500g of water to soak for 4.5h at room temperature, dissociate the pulp for 10min through a disintegrator, and dehydrate it by suction to a pulp concentration of 25%; then weigh the mass of the pulp , add water to dilute to a pulp concentration of 10%; then use a PFI mill to beat the slurry with a pulp concentration of 10% to obtain micronized plant fibers with a beating degree of 70°SR.

[0037] (2) Dissolve 7.6g of cationic starch and 1.5g of polyvinyl alcohol in 210g of water, gelatinize at 90°C for 28 minutes, and cool to room temperature to obtain gelatinized cationic starch and polyvinyl alcohol.

[0038] (3) Add 22.4g of micronized plant fiber and 0.5g of magnesium stearate into the cationic starch and polyvinyl alcohol gelatinized product in the previous step and stir evenly; then add 9.0g of NaHCO 3 , mix well and let stand for ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a micronized plant fiber buffer material and a preparation method thereof. According to the micronized plant fiber buffer material, bleached plant fibers are used as main raw materials, high-beating-degree micronized plant fibers are obtained through beating by a PFI beater, then cationic starch and polyvinyl alcohol paste, a plasticizer and a foaming agent are added, the mixture is mixed evenly to be injected into a mold and fully foamed with a microwave foaming technology, and after the mixture is molded, the plant fiber foamed buffer material is obtained through demolding and drying. According to the micronized plant fiber buffer material and the preparation method thereof, raw material sources are rich, the method technology is simple, and the production energy consumption and the cost are low; the prepared foamed buffer material is lower in apparent density, lower in volume change rate and hygroscopic capacity, capable of being prepared into products with different shapes and sizes according to actual requirements, excellent in applicability and buffer performance, easy to degrade, free from environmental pollution and widely applicable to the packaging field.

Description

technical field [0001] The invention relates to a packaging cushioning material, in particular to a micronized plant fiber cushioning material and a preparation method thereof. Background technique [0002] At present, common degradable and environmentally friendly cushioning materials are mainly pulp molding products and honeycomb paperboard products. The materials have high brittleness, high specific gravity, poor resilience and small cushioning coefficient, and the environmental humidity has a great influence on the structural performance. Plant fiber foaming cushioning material is a new type of green cushioning material that is different from pulp molding products and honeycomb paperboard. It uses plant fiber as the main raw material, adds additives, and performs foaming treatment to form a three-dimensional network structure inside the material. Therefore, it has good cushioning performance and ensures the structural stability of the cushioning material. The plant fibe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L3/02C08L29/04C08K5/098C08J9/08
Inventor 黄崇杏朱琦赵媛李翠翠陈宜昭
Owner GUANGXI UNIV
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