Plastic packaging bag material capable of being utilized by means of biodegradation and method for preparing plastic packaging bag material
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A biodegradable, packaging bag technology, applied in the field of material engineering, can solve problems such as environmental pollution and resource waste, and achieve the effects of being environmentally friendly, avoiding environmental damage, and having large-scale industrial application prospects.
Active Publication Date: 2018-09-14
CHONGQING UNIV OF TECH
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Abstract
Description
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Problems solved by technology
If it is not treated in time, it will easily cause environmental pollution and waste of resources.
Method used
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Examples
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Embodiment 1
[0036] A biodegradable plastic packaging bag material, in parts by mass, consists of the following components: 100 parts of polyvinyl alcohol, 40 parts of distiller's grains, 7.5 parts of citric acid monohydrate, 30 parts of glycerin, and distilled water accounts for 10% of the total mass .
[0037] Its concrete preparation steps are as follows:
[0038] 1) Dry the distiller's grains at 60°C for 24 hours, then crush them to 50-100 mesh, and then dry them at 60°C for 3 hours to obtain distiller's grains powder;
[0039] 2) Dissolve polyvinyl alcohol solids in water, and stir at 80°C at a speed of 400r / min for 1 h to form a polyvinyl alcohol solution; wherein, the mass-volume ratio of polyvinyl alcohol to water is 20 g: 300 mL;
[0040] 3) Heat the above polyvinyl alcohol solution to 90°C, add the above-mentioned citric acid monohydrate and glycerin, stir for 3 hours to make it react fully; then add the above-mentioned distiller’s grain powder to it, and continue stirring for 3...
Embodiment 2 13
[0043] The preparation process and process parameters of Examples 2 to 13 are the same as those of Example 1, the difference being that the ingredient formulations are different, see Table 1 for details:
[0044] Table 1 Ingredient formulations of Examples 2 to 13 (calculated in parts by mass)
[0045] Numbering
Polyvinyl alcohol (parts)
Distiller's grain powder (part)
Citric Acid Monohydrate (parts)
Glycerin (parts)
The ratio of distilled water to the total mass (%)
Embodiment two
100
40
0
30
0
Embodiment three
100
40
2.5
30
0
Embodiment Four
100
40
5
30
0
Embodiment five
100
40
7.5
30
0
Embodiment six
100
40
10
30
0
Embodiment seven
100
40
0
30
10
Embodiment eight
100
40
2.5
30
10
Embodiment nine
100
40
5
30
10
Embodiment ten
100
40
10
30
10
Embod...
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PUM
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Abstract
The invention discloses a plastic packaging bag material capable of being utilized by means of biodegradation and a method for preparing the plastic packaging bag material. The plastic packaging bag material comprises, by weight, 100 parts of polyvinyl alcohol, 20-80 parts of distillers' grains, 2.5-10 parts of citric acid monohydrate, 30 parts of glycerin and distilled water. The distilled wateraccounts for 0-10% of the total mass of the plastic packaging bag material. The method includes drying and smashing the distillers' grains; preparing polyvinyl alcohol solution from polyvinyl alcoholsolid, heating the polyvinyl alcohol solution, adding citric acid and the glycerin into the polyvinyl alcohol solution, stirring the citric acid, the glycerin and the polyvinyl alcohol solution to obtain mixtures, carrying out sufficient reaction on the mixtures, then adding the distillers' grains into reaction products and continuing to stir the distillers' grains and the reaction products to obtain distillers' grains-polyvinyl alcohol suspension; drying the distillers' grains-polyvinyl alcohol suspension to obtain thin films; immersing the thin films in water for 1 hour, taking the thin films out of the water, and drying the thin films for the adjusted drying time to obtain distillers' grains-polyvinyl alcohol composite thin film materials with the water contents of 0-10%; carrying out extrusion tape casting processes or solution casting forming techniques to obtain biodegradable plastic packaging bags. The plastic packaging bag material and the method have the advantages that the plastic packaging bag material is easy to produce, products are short in degradation time and can be used for compost, and waste can be efficiently utilized in a recycled manner.
Description
technical field [0001] The invention belongs to the technical field of material engineering, and in particular relates to a biodegradable plastic packaging bag material and a preparation method thereof. Background technique [0002] Plastic bags can be divided into many types according to their uses, such as shopping bags, packaging bags, garbage bags, document bags, fresh-keeping bags and so on. As far as China is concerned, more than 2 billion plastic bags are used every day, and the demand is huge. In particular, plastic packaging bags are widely used with the popularity of online shopping, and the resulting environmental pollution has attracted more and more attention. The vast majority of plastic bags are made of non-degradable materials. When such plastic bags are buried in the ground, they will take about 200 years to decompose and seriously pollute the soil; if they are incinerated, they will produce harmful smoke and toxic gas, polluting the environment. It can b...
Claims
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Application Information
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