CN117229573A - Degradable resin composition, degradable resin product using same and application - Google Patents
Degradable resin composition, degradable resin product using same and application Download PDFInfo
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- CN117229573A CN117229573A CN202211105270.XA CN202211105270A CN117229573A CN 117229573 A CN117229573 A CN 117229573A CN 202211105270 A CN202211105270 A CN 202211105270A CN 117229573 A CN117229573 A CN 117229573A
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- 239000011347 resin Substances 0.000 title claims abstract description 80
- 229920005989 resin Polymers 0.000 title claims abstract description 80
- 239000011342 resin composition Substances 0.000 title claims abstract description 56
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 69
- 229920001592 potato starch Polymers 0.000 claims abstract description 31
- 229920000954 Polyglycolide Polymers 0.000 claims abstract description 25
- 239000004633 polyglycolic acid Substances 0.000 claims abstract description 25
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims abstract description 23
- 235000013539 calcium stearate Nutrition 0.000 claims abstract description 23
- 239000008116 calcium stearate Substances 0.000 claims abstract description 23
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 23
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 23
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 23
- 238000004806 packaging method and process Methods 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims description 33
- 239000002184 metal Substances 0.000 claims description 33
- 239000002655 kraft paper Substances 0.000 claims description 31
- 239000004698 Polyethylene Substances 0.000 claims description 22
- 229920003023 plastic Polymers 0.000 claims description 22
- 239000004033 plastic Substances 0.000 claims description 22
- -1 polyethylene Polymers 0.000 claims description 22
- 229920000573 polyethylene Polymers 0.000 claims description 22
- UUGLJVMIFJNVFH-UHFFFAOYSA-N Hexyl benzoate Chemical group CCCCCCOC(=O)C1=CC=CC=C1 UUGLJVMIFJNVFH-UHFFFAOYSA-N 0.000 claims description 20
- 239000004014 plasticizer Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 11
- 238000007664 blowing Methods 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 8
- 239000008213 purified water Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 6
- 230000000844 anti-bacterial effect Effects 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 6
- 229920000223 polyglycerol Polymers 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 238000004026 adhesive bonding Methods 0.000 description 12
- 230000003115 biocidal effect Effects 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 3
- 235000011837 pasties Nutrition 0.000 description 3
- 238000006065 biodegradation reaction Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The invention discloses a degradable resin composition, a degradable resin product using the same and application thereof, wherein the degradable resin composition comprises the following components in parts by weight: 40-60 parts of potato starch; 20-35 parts of polyglycolic acid resin; 15-20 parts of glycerol; 2-10 parts of low-density polyethylene; 0.2-0.6 part of calcium stearate; 1-3 parts of emulsifying agent. The degradable resin composition, the degradable resin product and the application thereof provided by the invention have the advantages that the potato starch is utilized to improve the formability of the degradable resin composition, and the degradable resin composition is cooperatively compounded with polyglycolic acid resin, glycerol, low-density polyethylene, calcium stearate and an emulsifier, so that the degradable resin composition with good mechanical strength can be prepared, is suitable for being widely popularized and used in the aspects of environment-friendly packaging bags and the like, and has excellent economical efficiency and environmental friendliness.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a degradable resin composition, a degradable resin product using the same and application of the degradable resin composition.
Background
Along with the high-speed development of the economy and society and the enhancement of environmental protection consciousness of people, the environment-friendly, low-carbon, environment-friendly and degradable concepts gradually go deep into the mind, and the environment-friendly strength is realized, so that the health and wealth are promoted. The degradable resin can be decomposed in soil or water, so that the ecological environment is not destroyed, and the degradable resin is more and more favored by people. It would be desirable to be able to use such degradable resins to make environmentally friendly packaging materials and the like, which would undoubtedly greatly improve the problem of difficult disposal of existing waste. However, the research on how to use polyglycolic acid degradable resin is very few at present, so the invention provides a degradable resin composition, and a degradable resin product and application using the same, which can make up the defects of the prior art and provide technical support for the application of polyglycolic acid degradable resin in the field of environmental protection.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention aims to provide a degradable resin composition, a degradable resin product using the same and application thereof.
In order to achieve the above purpose and achieve the above technical effects, the invention adopts the following technical scheme:
a degradable resin composition comprises the following components in parts by weight:
40-60 parts of potato starch
20-35 parts of polyglycolic acid resin
15-20 parts of glycerol
2-10 parts of low-density polyethylene
0.2 to 0.6 part of calcium stearate
1-3 parts of emulsifying agent.
Further, the degradable resin composition further comprises 0.5 to 5 parts of a plasticizer.
Further, the plasticizer is n-hexyl benzoate or polyglycerol acetate.
The invention discloses a preparation method of a degradable resin composition, which comprises the following steps:
1) Adding 40-60 parts by weight of potato starch, 20-35 parts by weight of polyglycolic acid resin, 15-20 parts by weight of glycerol, 2-10 parts by weight of low-density polyethylene, 0.2-0.6 part by weight of calcium stearate and 1-3 parts by weight of emulsifier into a stirrer, stirring uniformly, adding purified water, and continuously stirring to form paste;
2) Adding the mixture obtained in the step 1) into a double-screw extruder, banburying, extruding, granulating and blowing a film to obtain a required degradable resin composition;
in the step 1), 0.5 to 5 parts of plasticizer is selectively added, and the mixture is uniformly stirred and mixed with 40 to 60 parts of potato starch, 20 to 35 parts of polyglycolic acid resin, 15 to 20 parts of glycerol, 2 to 10 parts of low-density polyethylene, 0.2 to 0.6 part of calcium stearate and 1 to 3 parts of emulsifier.
Further, the fineness of the potato starch is controlled to be 150-500 meshes, and the water content is controlled to be 10-15wt%.
The invention also discloses a degradable resin product which comprises an antibacterial layer, a first kraft layer, a degradable resin layer, a biodegradable layer, a polyethylene plastic layer and a second kraft layer which are sequentially arranged from outside to inside, wherein the degradable resin layer is prepared from the degradable resin composition.
Further, the biodegradable layer comprises a metal supporting net, one surface of the metal supporting net is bonded with a degradable resin layer through formaldehyde-free glue, the other surface of the metal supporting net opposite to the metal supporting net is bonded with a polyethylene plastic layer through formaldehyde-free glue, and a biodegradable agent is embedded in a grid of the metal supporting net.
The invention discloses an application of a degradable resin product in preparing an environment-friendly packaging bag.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a degradable resin composition, a degradable resin product using the same and application thereof, wherein the degradable resin composition comprises the following components in parts by weight: 40-60 parts of potato starch; 20-35 parts of polyglycolic acid resin; 15-20 parts of glycerol; 2-10 parts of low-density polyethylene; 0.2-0.6 part of calcium stearate; 1-3 parts of emulsifying agent. The degradable resin composition, the degradable resin product and the application thereof provided by the invention have the advantages that the potato starch is utilized to improve the formability of the degradable resin composition, and the degradable resin composition is cooperatively compounded with polyglycolic acid resin, glycerol, low-density polyethylene, calcium stearate and an emulsifier, so that the degradable resin composition with good mechanical strength can be prepared, is suitable for being widely popularized and used in the aspects of environment-friendly packaging bags and the like, and has excellent economical efficiency and environmental friendliness.
Detailed Description
The present invention is described in detail below so that advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and unambiguous the scope of the present invention.
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
In one aspect, the invention discloses a degradable resin composition, which comprises the following components in parts by weight:
40-60 parts of potato starch
20-35 parts of polyglycolic acid resin
15-20 parts of glycerol
2-10 parts of low-density polyethylene
0.2 to 0.6 part of calcium stearate
1-3 parts of emulsifying agent.
The degradable resin composition further comprises 0.5-5 parts of plasticizer.
The plasticizer is n-hexyl benzoate or polyglycerol acetate.
In another aspect, the invention discloses a method of preparing a degradable resin composition comprising the steps of:
1) Adding 40-60 parts by weight of potato starch, 20-35 parts by weight of polyglycolic acid resin, 15-20 parts by weight of glycerol, 2-10 parts by weight of low-density polyethylene, 0.2-0.6 part by weight of calcium stearate and 1-3 parts by weight of emulsifier into a stirrer, stirring uniformly, adding purified water, and continuously stirring to form paste;
2) Adding the mixture obtained in the step 1) into a double-screw extruder, banburying, extruding, granulating and blowing a film to obtain a required degradable resin composition;
in the step 1), 0.5 to 5 parts of plasticizer is selectively added, and the mixture is uniformly stirred and mixed with 40 to 60 parts of potato starch, 20 to 35 parts of polyglycolic acid resin, 15 to 20 parts of glycerol, 2 to 10 parts of low-density polyethylene, 0.2 to 0.6 part of calcium stearate and 1 to 3 parts of emulsifier.
The fineness of potato starch is controlled at 150-500 meshes, and the water content is controlled at 10-15wt%.
The invention also discloses a degradable resin product, which comprises an antibacterial layer, a first kraft layer, a degradable resin layer, a biodegradable layer, a polyethylene plastic layer and a second kraft layer which are sequentially arranged from outside to inside, wherein the degradable resin layer is prepared by adopting the degradable resin composition, the biodegradable layer comprises a metal supporting net, one surface of the metal supporting net is bonded with the degradable resin layer through formaldehyde-free glue, the other surface of the metal supporting net is bonded with the polyethylene plastic layer through formaldehyde-free glue, and a biodegradable agent is embedded in a grid of the metal supporting net.
As a specific embodiment, the thickness of the antibacterial layer is 0.2-0.3mm, the thickness of the degradable resin layer is 1-3mm, and the thickness of the polyethylene plastic layer is 0.3-0.5mm.
Meanwhile, the invention also discloses application of the degradable resin product in preparing environment-friendly packaging bags.
Example 1
A degradable resin composition comprises the following components in parts by weight:
potato starch 42 parts
35 parts of polyglycolic acid resin
Glycerol 18 parts
10 parts of low density polyethylene
0.6 part of calcium stearate
2 parts of emulsifying agent.
5 parts of n-hexyl benzoate plasticizer.
The preparation method of the degradable resin composition of the embodiment comprises the following steps:
1) Adding 42 parts of potato starch, 35 parts of polyglycolic acid resin, 18 parts of glycerol, 10 parts of low-density polyethylene, 0.6 part of calcium stearate, 2 parts of emulsifier and 5 parts of n-hexyl benzoate plasticizer into a stirrer, stirring uniformly, adding purified water, and continuously stirring to form paste;
2) Adding the mixture obtained in the step 1) into a double-screw extruder, banburying, extruding, granulating and blowing a film to obtain a required degradable resin composition;
wherein the fineness of potato starch is controlled at 200 meshes, and the water content is controlled at 10wt%.
The embodiment discloses a degradable resin product, including from outside to inside loops through formaldehyde-free glue bonding's antibiotic layer, first kraft layer, degradable resin layer, biodegradable layer, polyethylene plastic layer and second kraft layer, antibiotic layer's thickness is 0.2mm, first kraft layer and second kraft layer adopt market's kraft paper can, degradable resin layer adopts a degradable resin composition preparation as described above, degradable resin layer's thickness is 2mm, biodegradable layer includes metal support net, metal support net's one side has degradable resin layer through formaldehyde-free glue bonding, metal support net's opposite side has polyethylene plastic layer through formaldehyde-free glue bonding, the embedding biodegradable in the net of metal support net, polyethylene plastic layer's thickness is 0.3mm.
The degradable resin product of the embodiment can be used for preparing environment-friendly packaging bags, has economy and environmental protection, and is easy to degrade.
Example 2
A degradable resin composition comprises the following components in parts by weight:
potato starch 50 parts
25 parts of polyglycolic acid resin
Glycerol 16 parts
3 parts of low-density polyethylene
0.5 part of calcium stearate
3 parts of emulsifying agent.
2 parts of polyglycerol acetate plasticizer.
A method of preparing a degradable resin composition comprising the steps of:
1) Adding 50 parts of potato starch, 25 parts of polyglycolic acid resin, 16 parts of glycerol, 3 parts of low-density polyethylene, 0.5 part of calcium stearate, 3 parts of emulsifier and 2 parts of polyglycerol acetate plasticizer into a stirrer, stirring uniformly, adding purified water, and continuously stirring to form paste;
2) Adding the mixture obtained in the step 1) into a double-screw extruder, banburying, extruding, granulating and blowing a film to obtain a required degradable resin composition;
wherein the fineness of potato starch is controlled at 150 meshes, and the water content is controlled at 10wt%.
The utility model provides a degradable resin product, including the antibiotic layer that sets gradually from outside to interior, first kraft layer, degradable resin layer, biodegradable layer, polyethylene plastic layer and second kraft layer, antibiotic layer's thickness is 0.2mm, first kraft layer and second kraft layer adopt market's kraft paper can, degradable resin layer adopts a degradable resin composition preparation as above, degradable resin layer's thickness is 2mm, biodegradable layer includes the metal supporting network, the one side of metal supporting network has degradable resin layer through formaldehyde-free glue bonding, the opposite side of metal supporting network has polyethylene plastic layer through formaldehyde-free glue bonding, the embedding has the biodegradable agent in the net of metal supporting network, polyethylene plastic layer's thickness is 0.3mm.
Example 1 was followed.
Example 3
A degradable resin composition comprises the following components in parts by weight:
60 parts of potato starch
20 parts of polyglycolic acid resin
Glycerol 16 parts
2 parts of low-density polyethylene
0.2 part of calcium stearate
Emulsifier 1 part
0.5 part of plasticizer.
The plasticizer is n-hexyl benzoate or polyglycerol acetate.
A method of preparing a degradable resin composition comprising the steps of:
1) 60 parts of potato starch, 20 parts of polyglycolic acid resin, 16 parts of glycerol, 2 parts of low-density polyethylene, 0.2 part of calcium stearate, 1 part of emulsifying agent and 0.5 part of plasticizer are added into a stirrer, and after being stirred uniformly, purified water is added, and stirring is continued until the mixture is pasty;
2) Adding the mixture obtained in the step 1) into a double-screw extruder, banburying, extruding, granulating and blowing a film to obtain a required degradable resin composition;
wherein the fineness of potato starch is controlled at 500 meshes, and the water content is controlled at 13wt%.
The utility model provides a degradable resin product, including the antibiotic layer that sets gradually from outside to interior, first kraft layer, degradable resin layer, biodegradable layer, polyethylene plastic layer and second kraft layer, antibiotic layer's thickness is 0.3mm, first kraft layer and second kraft layer adopt market's kraft paper can, degradable resin layer adopts a degradable resin composition preparation as above, degradable resin layer's thickness is 3mm, biodegradable layer includes the metal supporting network, the one side of metal supporting network has degradable resin layer through formaldehyde-free glue bonding, the opposite side of metal supporting network has polyethylene plastic layer through formaldehyde-free glue bonding, the embedding has the biodegradable agent in the net of metal supporting network, polyethylene plastic layer's thickness is 0.4mm.
Example 1 was followed.
Example 4
A degradable resin composition comprises the following components in parts by weight:
45 parts of potato starch
20 parts of polyglycolic acid resin
Glycerol 17 parts
4 parts of low-density polyethylene
0.5 part of calcium stearate
3 parts of emulsifying agent
0.5 part of n-hexyl benzoate plasticizer.
A method of preparing a degradable resin composition comprising the steps of:
1) 45 parts of potato starch, 20 parts of polyglycolic acid resin, 17 parts of glycerol, 4 parts of low-density polyethylene, 0.5 part of calcium stearate, 3 parts of emulsifier and 0.5 part of n-hexyl benzoate plasticizer are added into a stirrer, and after being stirred uniformly, purified water is added and continuously stirred until the mixture is pasty;
2) Adding the mixture obtained in the step 1) into a double-screw extruder, banburying, extruding, granulating and blowing a film to obtain a required degradable resin composition;
wherein the fineness of potato starch is controlled at 400 meshes, and the water content is controlled at 12wt%.
The utility model provides a degradable resin product, including the antibiotic layer that sets gradually from outside to interior, first kraft layer, degradable resin layer, biodegradable layer, polyethylene plastic layer and second kraft layer, antibiotic layer's thickness is 0.2mm, first kraft layer and second kraft layer adopt market's kraft paper can, degradable resin layer adopts a degradable resin composition preparation as above, degradable resin layer's thickness is 2mm, biodegradable layer includes the metal supporting network, the one side of metal supporting network has degradable resin layer through formaldehyde-free glue bonding, the opposite side of metal supporting network has polyethylene plastic layer through formaldehyde-free glue bonding, the embedding has the biodegradable agent in the net of metal supporting network, polyethylene plastic layer's thickness is 0.3mm.
Example 1 was followed.
Example 5
A degradable resin composition comprises the following components in parts by weight:
60 parts of potato starch
Polyglycolic acid resin 22 parts
Glycerol 15 parts
3.5 parts of low density polyethylene
0.4 part of calcium stearate
1 part of emulsifying agent.
0.5 part of n-hexyl benzoate plasticizer.
A method of preparing a degradable resin composition comprising the steps of:
1) 60 parts of potato starch, 22 parts of polyglycolic acid resin, 15 parts of glycerol, 3.5 parts of low-density polyethylene, 0.4 part of calcium stearate, 1 part of emulsifying agent and 0.5 part of n-hexyl benzoate plasticizer are added into a stirrer, and after being stirred uniformly, purified water is added and continuously stirred until the mixture is pasty;
2) Adding the mixture obtained in the step 1) into a double-screw extruder, banburying, extruding, granulating and blowing a film to obtain a required degradable resin composition;
wherein the fineness of potato starch is controlled at 200 meshes, and the water content is controlled at 10wt%.
The utility model provides a degradable resin product, including from outside to interior antibacterial layer that loops through formaldehyde-free glue bonding, first kraft layer, degradable resin layer, biodegradable layer, polyethylene plastic layer and second kraft layer, antibacterial layer's thickness is 0.2mm, first kraft layer and second kraft layer adopt market's kraft paper can, degradable resin layer adopts a degradable resin composition preparation as above, degradable resin layer's thickness is 3mm, biodegradable layer includes metal supporting mesh, metal supporting mesh's one side has degradable resin layer through formaldehyde-free glue bonding, metal supporting mesh's opposite side has polyethylene plastic layer through formaldehyde-free glue bonding, the embedding has the biodegradable in the net of metal supporting mesh, polyethylene plastic layer's thickness is 0.5mm.
Example 1 was followed.
Comparative example 1
One piece of packaging bag is purchased in the market.
The packages obtained in examples 1-3 and comparative example 1 were subjected to performance test, and the test results are shown in Table 1.
TABLE 1
| Project | Example 1 | Example 2 | Example 3 | Comparative example 1 |
| Speed of biodegradation | Δ | Δ | Δ | × |
| Hydrolysis rate | ⊙ | ⊙ | ⊙ | ○ |
| Impact Strength | 9.1 | 9.4 | 9.3 | 9.0 |
In Table 1, Δ represents a mass reduction rate of 55 to 80%; x represents a mass reduction rate of less than 12%; as indicated by the letter, the retention after 1 week was more than 75%; the retention after 1 week was 70 to 75%.
As is clear from Table 1, the environment-friendly packaging bags obtained in examples 1 to 3 have suitable biodegradation rate and hydrolysis rate and excellent mechanical strength.
Parts or structures not specifically described are only required to be in the prior art or the existing product, and are not described herein.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present invention.
Claims (8)
1. The degradable resin composition is characterized by comprising the following components in parts by weight:
40-60 parts of potato starch
20-35 parts of polyglycolic acid resin
15-20 parts of glycerol
2-10 parts of low-density polyethylene
0.2 to 0.6 part of calcium stearate
1-3 parts of emulsifying agent.
2. The degradable resin composition according to claim 1, wherein the degradable resin composition further comprises 0.5-5 parts of plasticizer.
3. A degradable resin composition according to claim 2, characterized in that the plasticizer is n-hexyl benzoate or polyglycerol acetate.
4. A process for producing a degradable resin composition according to any one of claims 1 to 3, characterized by comprising the steps of:
1) Adding 40-60 parts by weight of potato starch, 20-35 parts by weight of polyglycolic acid resin, 15-20 parts by weight of glycerol, 2-10 parts by weight of low-density polyethylene, 0.2-0.6 part by weight of calcium stearate and 1-3 parts by weight of emulsifier into a stirrer, stirring uniformly, adding purified water, and continuously stirring to form paste;
2) Adding the mixture obtained in the step 1) into a double-screw extruder, banburying, extruding, granulating and blowing a film to obtain a required degradable resin composition;
in the step 1), 0.5 to 5 parts of plasticizer is selectively added, and the mixture is uniformly stirred and mixed with 40 to 60 parts of potato starch, 20 to 35 parts of polyglycolic acid resin, 15 to 20 parts of glycerol, 2 to 10 parts of low-density polyethylene, 0.2 to 0.6 part of calcium stearate and 1 to 3 parts of emulsifier.
5. The method for producing a degradable resin composition according to claim 4, wherein the fineness of potato starch is controlled to 150-500 mesh and the water content is controlled to 10-15wt%.
6. A degradable resin product, which is characterized by comprising an antibacterial layer, a first kraft layer, a degradable resin layer, a biodegradable layer, a polyethylene plastic layer and a second kraft layer which are sequentially arranged from outside to inside, wherein the degradable resin layer is prepared by adopting the degradable resin composition of any one of claims 1-3.
7. The degradable resin product of claim 6, wherein the biodegradable layer comprises a metal support mesh, one side of the metal support mesh is bonded with the degradable resin layer through formaldehyde-free glue, the other side of the metal support mesh is bonded with a polyethylene plastic layer through formaldehyde-free glue, and a biodegradable agent is embedded in the mesh of the metal support mesh.
8. Use of a degradable resin product according to claim 6 or 7 for the preparation of environment-friendly packaging bags.
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