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Degradable paper-plastic composite bag and preparation method thereof

A paper-plastic composite bag and paper-based technology, applied in the field of composite bag manufacturing, can solve problems such as environmental damage, long degradation time (decades or even hundreds of years, and poor photodegradability and biodegradability of polypropylene)

Active Publication Date: 2017-09-29
TONGLING FOUNDER PLASTICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the plastic layer of paper-plastic bags is usually made of polypropylene. The photodegradability and biodegradability of polypropylene are not strong, the degradation time is long (decades or even hundreds of years), and the degradation conditions are harsh.
It can be seen from the above that once this paper-plastic bag enters the natural environment as garbage, it will cause irreversible damage to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The present invention also provides a method for preparing a degradable paper-plastic composite bag, the method comprising:

[0026] (1) Starch, plant fiber, polyvinyl alcohol, poly-β-hydroxybutyrate, polyethylene, polycarbonate, nano-titanium dioxide, glycerin, plasticizer and stabilizer are mixed and extruded to form a film;

[0027] (2) The film is heated and coated on the surface of the paper layer to form a plastic layer to make a composite paper; or the film is cut, drawn, and woven into a plastic layer, and then the plastic layer is glued Adhesive is stuck on the surface of described paper layer to make composite paper;

[0028] (3) Processing the composite paper machine into a degradable paper-plastic composite bag.

[0029] In the above preparation method, the specific type of starch can be selected in a wide range, which can be wheat starch and potato starch, and can also be sweet potato starch and mung bean starch. At the same time, the molecular weight of ...

Embodiment 1

[0044] (1) At 25°C, wheat starch (weight-average molecular weight is 16000), rice husk (weight-average molecular weight is 17000), polyvinyl alcohol (weight-average molecular weight is 18000), poly-β-hydroxybutyrate (weight-average Molecular weight is 19000), polyethylene (weight-average molecular weight is 18000), polycarbonate (weight-average molecular weight is 20000), nano-titanium dioxide (particle diameter 400nm), glycerin, plasticizer and stabilizer (the mass ratio of each raw material is successively 100:12:20:12:12:16:4:2:4:3) mixed for 2 hours, and extruded at 240°C to obtain a film.

[0045] (2) cutting, drawing and weaving the film into a plastic layer, and then the plastic layer is adhered to the surface of the paper layer by an adhesive to make a composite paper (a combination of the paper layer and the plastic layer) The thickness ratio is 1.1:1).

[0046] (3) Process the above-mentioned composite paper machine into a degradable paper-plastic composite bag A1. ...

Embodiment 2

[0049] (1) At 25°C, potato starch (weight-average molecular weight is 12000), straw plant fiber (weight-average molecular weight is 15000), polyvinyl alcohol (weight-average molecular weight is 16000), poly-β-hydroxybutyrate (weight-average Average molecular weight is 12000), polyethylene (weight average molecular weight is 14000), polycarbonate (weight average molecular weight is 18000), nano-titanium dioxide (particle diameter 300nm), glycerin, plasticizer and stabilizer (the mass ratio of each raw material is sequential (100:10:15:5:10:12:5:1:3:2) were mixed for 2 hours, and extruded at 240°C to obtain a film.

[0050] (2) The film is cut, drawn, and woven into a plastic layer, and then the plastic layer is adhered to the surface of the paper layer by an adhesive to make a composite paper (the combination of the paper layer and the plastic layer) The thickness ratio is 1.2:1).

[0051] (3) Process the above-mentioned composite paper machine into a degradable paper-plastic ...

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Abstract

The invention discloses a degradable paper plastic composite bag including a plastic layer and a paper layer, the plastic layer is arranged on the surface of the paper layer, the plastic layer includes starch, vegetable fibre, polyvinyl alcohol, poly Beta-hydroxybutyrate, polyethylene, polycarbonate, nanometer titanium dioxide, glycerin, a plasticizer, and a stabilizing agent. The degradable paper plastic composite bag has excellent photodegradation and biodegradation properties, and is mild in degradation conditions and short in degradation time. The nanometer titanium dioxide in the plastic layer further improves the ultraviolet resistance capability of the plastic layer on the basis of having excellent degradability. In addition, the preparation method of the degradable paper plastic composite bag is simple in step and the degradable paper plastic composite bag can be produced industrially in batch because the raw materials are easy to get.

Description

technical field [0001] The invention relates to the field of composite bag manufacturing, in particular to a degradable paper-plastic composite bag and a preparation method thereof. Background technique [0002] As a convenient storage device, paper-plastic bags have been widely used in people's daily life to transport small bulk powder and granular materials. ， It is a very popular packaging material at present. A paper-plastic bag is a composite paper bag, including a paper layer and a plastic layer. [0003] At present, the plastic layer of paper-plastic bags is usually made of polypropylene, which has poor photodegradability and biodegradability, long degradation time (decades or even hundreds of years), and harsh degradation conditions. It can be seen from the above that once this paper-plastic bag enters the natural environment as garbage, it will cause irreversible damage to the environment. Contents of the invention [0004] In view of the above prior art, the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65D30/08C08L3/02C08L97/02C08L29/04C08L67/04C08L23/06C08L69/00C08K13/02C08K3/22C08K5/053C08K5/098C08K5/12
CPCY02W90/10
Inventor 陈可夏陈可亮
Owner TONGLING FOUNDER PLASTICS TECH
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