CN108676285A - A kind of degradable plastic packaging material and preparation method thereof - Google Patents
A kind of degradable plastic packaging material and preparation method thereof Download PDFInfo
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- CN108676285A CN108676285A CN201810520942.0A CN201810520942A CN108676285A CN 108676285 A CN108676285 A CN 108676285A CN 201810520942 A CN201810520942 A CN 201810520942A CN 108676285 A CN108676285 A CN 108676285A
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
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- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
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- C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2427/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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- C08K5/00—Use of organic ingredients
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- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
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- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
Abstract
The invention discloses a kind of degradable plastic packaging materials, are made of the raw material of following parts by weight：30 40 parts of polyvinyl chloride resin, 10 13 parts of lactide, 7 11 parts of trimethylene carbonate, 5 15 parts of nanoplant fiber, 6 10 parts of starch from sweet potato, 38 parts of boron fibre, 36 parts of nano silicon dioxide, 48 parts of solubilizer, 7 12 parts of vegetable oil, 35 parts of plasticizer, 5 15 parts of bentonite, 23 parts of antioxidant, 36 parts of chitosan, 15 parts of foaming agent, 26 parts of polytetrafluoroethylene (PTFE) Ultramicro-powder, 13 parts of compatilizer, 24 parts of lubricant.Plastic package material of the present invention has degradability, the shock resistance, inoxidizability and corrosion resistance of existing packaging material are maintained, being finished after compost can be dissolved by environment, alleviate the pollution to environment significantly, the packaging material use scope is extensive, has a extensive future.
Description
Technical field
The present invention relates to packaging material field, specifically a kind of degradable plastic packaging material and preparation method thereof.
Background technology
With the fast development of China's packaging industry, packaging production is promoting the development of the national economy, is improving people's object
Position and function in matter culture life increasingly shows.Packaging Industry is arranged as an independent industry system, development
Enter the national economic and social development planning.
Traditional polymeric packaging material is difficult that degradation also produces while bringing people and facilitating in nature
Huge pollution, therefore we are badly in need of studying a kind of environment amenable packaging material.
Invention content
The purpose of the present invention is to provide a kind of degradable plastic packaging materials and preparation method thereof, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the present invention provides the following technical solutions：
A kind of degradable plastic packaging material is made of the raw material of following parts by weight：
30-40 parts of polyvinyl chloride resin, 10-13 parts of lactide, 7-11 parts of trimethylene carbonate, 5-15 parts of nanoplant fiber,
6-10 parts of starch from sweet potato, 3-8 parts of boron fibre, 3-6 parts of nano silicon dioxide, 4-8 parts of solubilizer, 7-12 parts of vegetable oil, plasticizer
3-5 parts, 5-15 parts of bentonite, 2-3 parts of antioxidant, 3-6 parts of chitosan, 1-5 parts of foaming agent, 2-6 parts of polytetrafluoroethylene (PTFE) Ultramicro-powder,
1-3 parts of compatilizer, 2-4 parts of lubricant.
A kind of degradable plastic packaging material is made of the raw material of following parts by weight：
30 parts of polyvinyl chloride resin, 10 parts of lactide, 7 parts of trimethylene carbonate, 5 parts of nanoplant fiber, 6 parts of starch from sweet potato,
3 parts of boron fibre, 3 parts of nano silicon dioxide, 4 parts of solubilizer, 7 parts of vegetable oil, 3 parts of plasticizer, 5 parts of bentonite, 2 parts of antioxidant,
3 parts of chitosan, 1 part of foaming agent, 2 parts of polytetrafluoroethylene (PTFE) Ultramicro-powder, 1 part of compatilizer, 2 parts of lubricant.
A kind of degradable plastic packaging material is made of the raw material of following parts by weight：
40 parts of polyvinyl chloride resin, 13 parts of lactide, 11 parts of trimethylene carbonate, 15 parts of nanoplant fiber, starch from sweet potato 10
Part, 8 parts of boron fibre, 6 parts of nano silicon dioxide, 8 parts of solubilizer, 12 parts of vegetable oil, 5 parts of plasticizer, 15 parts of bentonite, antioxidant
3 parts, 6 parts of chitosan, 5 parts of foaming agent, 6 parts of polytetrafluoroethylene (PTFE) Ultramicro-powder, 3 parts of compatilizer, 4 parts of lubricant.
A kind of degradable plastic packaging material is made of the raw material of following parts by weight：
34 parts of polyvinyl chloride resin, 12 parts of lactide, 9 parts of trimethylene carbonate, 10 parts of nanoplant fiber, starch from sweet potato 8
Part, 6 parts of boron fibre, 4.5 parts of nano silicon dioxide, 6 parts of solubilizer, 10 parts of vegetable oil, 4 parts of plasticizer, 10 parts of bentonite, antioxygen
2.5 parts of agent, 4.5 parts of chitosan, 3 parts of foaming agent, 4 parts of polytetrafluoroethylene (PTFE) Ultramicro-powder, 2 parts of compatilizer, 3 parts of lubricant.
The nanoplant fiber is selected from plant fiber made of the waste of peanut shell, sweet potato vine, Chinese medicine slag, bamboo,
Specific preparation method is by plant fiber by immersion, crushing, bleaching, thermophilic digestion in Calcified pond, then to use high temperature and pressure
After a series of stringent processing are dried in hot steam sealing, then sterilization is used, to ensure to reach as defined in GB18006-1-1999 greatly
Enterobacteria, salmonella, mould evaporation residue, content of beary metal, fluorescent substance, persticide residue items sanitation performance refer to
Mark, is made plant fiber.
The compatilizer is ethylene propylene diene rubber branch maleic anhydride, ethylene-octene copolymer grafted maleic anhydride, ethylene-
Ethyl propylene acid esters (EEA) copolymer, ethylene-methyl acrylate (EMA) copolymer, ethylene-butyl acrylate (EBA)
At least one of copolymer, methyl methacrylate-butadiene-styrene terpolymer (MBS).
The antioxidant is phosphite ester kind antioxidant (2,4- di-tert-butyl-phenyl) tris phosphite.
The lubricant be stearic acid, calcium stearate, N, N '-ethylenebisstearamides and grafting ethylene bis stearamide
At least one of.
A kind of preparation method of degradable plastic packaging material, includes the following steps：
1) it is 200-500nm by nano silicon dioxide, bentonite mixing and ball milling to average grain diameter, obtains filler mixed powder；
2) part weighs polyvinyl chloride resin, lactide, trimethylene carbonate, nanoplant fiber, sweet potato shallow lake in parts by weight
Powder；Drying preheating is carried out to proportioning raw material polyvinyl chloride resin, lactide, trimethylene carbonate, nanoplant fiber, starch from sweet potato,
3) drying preheating after by polyvinyl chloride resin, lactide, trimethylene carbonate, nanoplant fiber, starch from sweet potato, fill out
It is dry-mixed to expect that mixed powder, polytetrafluoroethylene (PTFE) Ultramicro-powder carry out；
4) vegetable oil, plasticizer, antioxidant, chitosan, foaming agent, compatible is added in the mixed powder prepared to step 3)
Agent, lubricant after high-speed stirred 25-35mi n, are placed in extruding pelletization in screw extruder, the extruder operating temperature is
165℃-260℃。
Compared with prior art, the beneficial effects of the invention are as follows：
The packaging material of the present invention, not only color and operability with the indistinction of packaging material containing benzene, but also due to not
Containing toluene, there is obviously effect to pollution-free to ambient air, to the body fanout free region of execute-in-place employee；This hair
It is bright it is raw materials used be all degradable environmentally safe natural organic matter, and production cost is low, can replace existing packaging
Material；The preparation method of the present invention is simple, wide market, is suitble to large-scale production.The packaging material of the present invention passes through original
Polytetrafluoroethylene (PTFE) Ultramicro-powder is added in material, its surface is made to have superior wear-resisting property, low-temperature impact-resistant performance good；The present invention
Plastic package material has degradability, maintains the shock resistance, inoxidizability and corrosion resistance of existing packaging material, uses
It is complete to be dissolved by environment after compost, alleviate the pollution to environment significantly, the packaging material use scope is extensive, and application prospect is wide
It is wealthy.
Specific implementation mode
Embodiment 1
A kind of degradable plastic packaging material is made of the raw material of following parts by weight：
30 parts of polyvinyl chloride resin, 10 parts of lactide, 7 parts of trimethylene carbonate, 5 parts of nanoplant fiber, 6 parts of starch from sweet potato,
3 parts of boron fibre, 3 parts of nano silicon dioxide, 4 parts of solubilizer, 7 parts of vegetable oil, 3 parts of plasticizer, 5 parts of bentonite, 2 parts of antioxidant,
3 parts of chitosan, 1 part of foaming agent, 2 parts of polytetrafluoroethylene (PTFE) Ultramicro-powder, 1 part of compatilizer, 2 parts of lubricant.
The nanoplant fiber is selected from plant fiber made of the waste of peanut shell, sweet potato vine, Chinese medicine slag, bamboo,
Specific preparation method is by plant fiber by immersion, crushing, bleaching, thermophilic digestion in Calcified pond, then to use high temperature and pressure
After a series of stringent processing are dried in hot steam sealing, then sterilization is used, to ensure to reach as defined in GB18006-1-1999 greatly
Enterobacteria, salmonella, mould evaporation residue, content of beary metal, fluorescent substance, persticide residue items sanitation performance refer to
Mark, is made plant fiber.
The compatilizer is ethylene propylene diene rubber branch maleic anhydride, ethylene-octene copolymer grafted maleic anhydride, ethylene-
Ethyl propylene acid esters (EEA) copolymer, ethylene-methyl acrylate (EMA) copolymer, ethylene-butyl acrylate (EBA)
At least one of copolymer, methyl methacrylate-butadiene-styrene terpolymer (MBS).
The antioxidant is phosphite ester kind antioxidant (2,4- di-tert-butyl-phenyl) tris phosphite.
The lubricant be stearic acid, calcium stearate, N, N '-ethylenebisstearamides and grafting ethylene bis stearamide
At least one of.
A kind of preparation method of degradable plastic packaging material, includes the following steps：
1) it is 200-500nm by nano silicon dioxide, bentonite mixing and ball milling to average grain diameter, obtains filler mixed powder；
2) part weighs polyvinyl chloride resin, lactide, trimethylene carbonate, nanoplant fiber, sweet potato shallow lake in parts by weight
Powder；Drying preheating is carried out to proportioning raw material polyvinyl chloride resin, lactide, trimethylene carbonate, nanoplant fiber, starch from sweet potato,
3) drying preheating after by polyvinyl chloride resin, lactide, trimethylene carbonate, nanoplant fiber, starch from sweet potato, fill out
It is dry-mixed to expect that mixed powder, polytetrafluoroethylene (PTFE) Ultramicro-powder carry out；
4) vegetable oil, plasticizer, antioxidant, chitosan, foaming agent, compatible is added in the mixed powder prepared to step 3)
Agent, lubricant after high-speed stirred 25-35mi n, are placed in extruding pelletization in screw extruder, the extruder operating temperature is
165℃-260℃。
Embodiment 2
A kind of degradable plastic packaging material is made of the raw material of following parts by weight：
40 parts of polyvinyl chloride resin, 13 parts of lactide, 11 parts of trimethylene carbonate, 15 parts of nanoplant fiber, starch from sweet potato 10
Part, 8 parts of boron fibre, 6 parts of nano silicon dioxide, 8 parts of solubilizer, 12 parts of vegetable oil, 5 parts of plasticizer, 15 parts of bentonite, antioxidant
3 parts, 6 parts of chitosan, 5 parts of foaming agent, 6 parts of polytetrafluoroethylene (PTFE) Ultramicro-powder, 3 parts of compatilizer, 4 parts of lubricant.
The nanoplant fiber is selected from plant fiber made of the waste of peanut shell, sweet potato vine, Chinese medicine slag, bamboo,
Specific preparation method is by plant fiber by immersion, crushing, bleaching, thermophilic digestion in Calcified pond, then to use high temperature and pressure
After a series of stringent processing are dried in hot steam sealing, then sterilization is used, to ensure to reach as defined in GB18006-1-1999 greatly
Enterobacteria, salmonella, mould evaporation residue, content of beary metal, fluorescent substance, persticide residue items sanitation performance refer to
Mark, is made plant fiber.
The compatilizer is ethylene propylene diene rubber branch maleic anhydride, ethylene-octene copolymer grafted maleic anhydride, ethylene-
Ethyl propylene acid esters (EEA) copolymer, ethylene-methyl acrylate (EMA) copolymer, ethylene-butyl acrylate (EBA)
At least one of copolymer, methyl methacrylate-butadiene-styrene terpolymer (MBS).
The antioxidant is phosphite ester kind antioxidant (2,4- di-tert-butyl-phenyl) tris phosphite.
The lubricant be stearic acid, calcium stearate, N, N '-ethylenebisstearamides and grafting ethylene bis stearamide
At least one of.
A kind of preparation method of degradable plastic packaging material, includes the following steps：
1) it is 200-500nm by nano silicon dioxide, bentonite mixing and ball milling to average grain diameter, obtains filler mixed powder；
2) part weighs polyvinyl chloride resin, lactide, trimethylene carbonate, nanoplant fiber, sweet potato shallow lake in parts by weight
Powder；Drying preheating is carried out to proportioning raw material polyvinyl chloride resin, lactide, trimethylene carbonate, nanoplant fiber, starch from sweet potato,
3) drying preheating after by polyvinyl chloride resin, lactide, trimethylene carbonate, nanoplant fiber, starch from sweet potato, fill out
It is dry-mixed to expect that mixed powder, polytetrafluoroethylene (PTFE) Ultramicro-powder carry out；
4) vegetable oil, plasticizer, antioxidant, chitosan, foaming agent, compatible is added in the mixed powder prepared to step 3)
Agent, lubricant after high-speed stirred 25-35mi n, are placed in extruding pelletization in screw extruder, the extruder operating temperature is
165℃-260℃。
Embodiment 3
A kind of degradable plastic packaging material is made of the raw material of following parts by weight：
34 parts of polyvinyl chloride resin, 12 parts of lactide, 9 parts of trimethylene carbonate, 10 parts of nanoplant fiber, starch from sweet potato 8
Part, 6 parts of boron fibre, 4.5 parts of nano silicon dioxide, 6 parts of solubilizer, 10 parts of vegetable oil, 4 parts of plasticizer, 10 parts of bentonite, antioxygen
2.5 parts of agent, 4.5 parts of chitosan, 3 parts of foaming agent, 4 parts of polytetrafluoroethylene (PTFE) Ultramicro-powder, 2 parts of compatilizer, 3 parts of lubricant.
The nanoplant fiber is selected from plant fiber made of the waste of peanut shell, sweet potato vine, Chinese medicine slag, bamboo,
Specific preparation method is by plant fiber by immersion, crushing, bleaching, thermophilic digestion in Calcified pond, then to use high temperature and pressure
After a series of stringent processing are dried in hot steam sealing, then sterilization is used, to ensure to reach as defined in GB18006-1-1999 greatly
Enterobacteria, salmonella, mould evaporation residue, content of beary metal, fluorescent substance, persticide residue items sanitation performance refer to
Mark, is made plant fiber.
The compatilizer is ethylene propylene diene rubber branch maleic anhydride, ethylene-octene copolymer grafted maleic anhydride, ethylene-
Ethyl propylene acid esters (EEA) copolymer, ethylene-methyl acrylate (EMA) copolymer, ethylene-butyl acrylate (EBA)
At least one of copolymer, methyl methacrylate-butadiene-styrene terpolymer (MBS).
The antioxidant is phosphite ester kind antioxidant (2,4- di-tert-butyl-phenyl) tris phosphite.
The lubricant be stearic acid, calcium stearate, N, N '-ethylenebisstearamides and grafting ethylene bis stearamide
At least one of.
A kind of preparation method of degradable plastic packaging material, includes the following steps：
1) it is 200-500nm by nano silicon dioxide, bentonite mixing and ball milling to average grain diameter, obtains filler mixed powder；
2) part weighs polyvinyl chloride resin, lactide, trimethylene carbonate, nanoplant fiber, sweet potato shallow lake in parts by weight
Powder；Drying preheating is carried out to proportioning raw material polyvinyl chloride resin, lactide, trimethylene carbonate, nanoplant fiber, starch from sweet potato,
3) drying preheating after by polyvinyl chloride resin, lactide, trimethylene carbonate, nanoplant fiber, starch from sweet potato, fill out
It is dry-mixed to expect that mixed powder, polytetrafluoroethylene (PTFE) Ultramicro-powder carry out；
4) vegetable oil, plasticizer, antioxidant, chitosan, foaming agent, compatible is added in the mixed powder prepared to step 3)
Agent, lubricant after high-speed stirred 25-35mi n, are placed in extruding pelletization in screw extruder, the extruder operating temperature is
165℃-260℃。
Claims (9)
1. a kind of degradable plastic packaging material, which is characterized in that be made of the raw material of following parts by weight：
30-40 parts of polyvinyl chloride resin, 10-13 parts of lactide, 7-11 parts of trimethylene carbonate, 5-15 parts of nanoplant fiber, sweet potato
6-10 parts of starch, 3-8 parts of boron fibre, 3-6 parts of nano silicon dioxide, 4-8 parts of solubilizer, 7-12 parts of vegetable oil, plasticizer 3-5
Part, 5-15 parts of bentonite, 2-3 parts of antioxidant, 3-6 parts of chitosan, 1-5 parts of foaming agent, 2-6 parts of polytetrafluoroethylene (PTFE) Ultramicro-powder, phase
Hold 1-3 parts of agent, 2-4 parts of lubricant.
2. a kind of degradable plastic packaging material according to claim 1, which is characterized in that by the raw material of following parts by weight
It is made：
30 parts of polyvinyl chloride resin, 10 parts of lactide, 7 parts of trimethylene carbonate, 5 parts of nanoplant fiber, 6 parts of starch from sweet potato, boron are fine
3 parts of dimension, 3 parts of nano silicon dioxide, 4 parts of solubilizer, 7 parts of vegetable oil, 3 parts of plasticizer, 5 parts of bentonite, 2 parts of antioxidant, shell are poly-
3 parts of sugar, 1 part of foaming agent, 2 parts of polytetrafluoroethylene (PTFE) Ultramicro-powder, 1 part of compatilizer, 2 parts of lubricant.
3. a kind of degradable plastic packaging material according to claim 1, which is characterized in that by the raw material of following parts by weight
It is made：
40 parts of polyvinyl chloride resin, 13 parts of lactide, 11 parts of trimethylene carbonate, 15 parts of nanoplant fiber, 10 parts of starch from sweet potato,
8 parts of boron fibre, 6 parts of nano silicon dioxide, 8 parts of solubilizer, 12 parts of vegetable oil, 5 parts of plasticizer, 15 parts of bentonite, antioxidant 3
Part, 6 parts of chitosan, 5 parts of foaming agent, 6 parts of polytetrafluoroethylene (PTFE) Ultramicro-powder, 3 parts of compatilizer, 4 parts of lubricant.
4. a kind of degradable plastic packaging material according to claim 1, which is characterized in that by the raw material of following parts by weight
It is made：
34 parts of polyvinyl chloride resin, 12 parts of lactide, 9 parts of trimethylene carbonate, 10 parts of nanoplant fiber, 8 parts of starch from sweet potato, boron
6 parts of fiber, 4.5 parts of nano silicon dioxide, 6 parts of solubilizer, 10 parts of vegetable oil, 4 parts of plasticizer, 10 parts of bentonite, antioxidant 2.5
Part, 4.5 parts of chitosan, 3 parts of foaming agent, 4 parts of polytetrafluoroethylene (PTFE) Ultramicro-powder, 2 parts of compatilizer, 3 parts of lubricant.
5. a kind of degradable plastic packaging material according to claim 1, which is characterized in that the nanoplant fiber choosing
From peanut shell, sweet potato vine, Chinese medicine slag, bamboo waste made of plant fiber.
6. a kind of degradable plastic packaging material according to claim 1, which is characterized in that the compatilizer is ternary second
Third rubber branch maleic anhydride, ethylene-octene copolymer grafted maleic anhydride, ethylene-ethyl acrylate (EEA) copolymer, second
Alkene-methacrylate (EMA) copolymer, ethylene-butyl acrylate (EBA) copolymer, methyl methacrylate-fourth two
At least one of alkene-styrene copolymer (MBS).
7. a kind of degradable plastic packaging material according to claim 1, which is characterized in that the antioxidant is phosphorous acid
Esters antioxidant (2,4- di-tert-butyl-phenyl) tris phosphite.
8. a kind of degradable plastic packaging material according to claim 1, which is characterized in that the lubricant is tristearin
Acid, calcium stearate, N, at least one of N '-ethylenebisstearamides and grafting ethylene bis stearamide.
9. a kind of preparation method of degradable plastic packaging material, which is characterized in that include the following steps：
1) it is 200-500nm by nano silicon dioxide, bentonite mixing and ball milling to average grain diameter, obtains filler mixed powder；
2) part weighs polyvinyl chloride resin, lactide, trimethylene carbonate, nanoplant fiber, starch from sweet potato in parts by weight；It is right
Proportioning raw material polyvinyl chloride resin, lactide, trimethylene carbonate, nanoplant fiber, starch from sweet potato carry out drying preheating,
3) polyvinyl chloride resin, lactide, trimethylene carbonate, nanoplant fiber, starch from sweet potato, filler are mixed after drying preheating
Conjunction powder, polytetrafluoroethylene (PTFE) Ultramicro-powder carry out dry-mixed；
4) vegetable oil, plasticizer, antioxidant, chitosan, foaming agent, compatilizer, profit is added in the mixed powder prepared to step 3)
Lubrication prescription after high-speed stirred 25-35min, is placed in extruding pelletization in screw extruder, and the extruder operating temperature is 165 DEG C-
260℃。
Priority Applications (1)
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| CN201810520942.0A CN108676285A (en) | 2018-05-28 | 2018-05-28 | A kind of degradable plastic packaging material and preparation method thereof |
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| CN113212921A (en) * | 2021-05-08 | 2021-08-06 | 漳州市圣铭工贸股份有限公司 | Degradable plastic bottle and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107337878A (en) * | 2017-08-15 | 2017-11-10 | 安徽华猫软包装有限公司 | A kind of plastic package material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107337878A (en) * | 2017-08-15 | 2017-11-10 | 安徽华猫软包装有限公司 | A kind of plastic package material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113212921A (en) * | 2021-05-08 | 2021-08-06 | 漳州市圣铭工贸股份有限公司 | Degradable plastic bottle and preparation method thereof |
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