WO2022099655A1 - Matériau de sac d'emballage biodégradable et son procédé de préparation - Google Patents
Matériau de sac d'emballage biodégradable et son procédé de préparation Download PDFInfo
- Publication number
- WO2022099655A1 WO2022099655A1 PCT/CN2020/128832 CN2020128832W WO2022099655A1 WO 2022099655 A1 WO2022099655 A1 WO 2022099655A1 CN 2020128832 W CN2020128832 W CN 2020128832W WO 2022099655 A1 WO2022099655 A1 WO 2022099655A1
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- WO
- WIPO (PCT)
- Prior art keywords
- parts
- packaging bag
- starch
- degradable packaging
- coupling agent
- Prior art date
Links
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 29
- 239000000463 material Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000002360 preparation method Methods 0.000 title abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000007822 coupling agent Substances 0.000 claims abstract description 13
- 229920000881 Modified starch Polymers 0.000 claims abstract description 12
- 239000004368 Modified starch Substances 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 12
- 235000019426 modified starch Nutrition 0.000 claims abstract description 12
- -1 polyethylene Polymers 0.000 claims abstract description 12
- 239000004698 Polyethylene Substances 0.000 claims abstract description 11
- 229920000573 polyethylene Polymers 0.000 claims abstract description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 9
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 9
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims abstract description 7
- 235000010987 pectin Nutrition 0.000 claims abstract description 7
- 239000001814 pectin Substances 0.000 claims abstract description 7
- 229920001277 pectin Polymers 0.000 claims abstract description 7
- 239000000661 sodium alginate Substances 0.000 claims abstract description 7
- 235000010413 sodium alginate Nutrition 0.000 claims abstract description 7
- 229940005550 sodium alginate Drugs 0.000 claims abstract description 7
- 239000005909 Kieselgur Substances 0.000 claims abstract description 6
- 239000011256 inorganic filler Substances 0.000 claims abstract description 6
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 6
- 239000004014 plasticizer Substances 0.000 claims abstract description 6
- 239000008213 purified water Substances 0.000 claims abstract description 6
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 5
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 3
- 239000003292 glue Substances 0.000 claims description 17
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 229920002472 Starch Polymers 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 9
- 235000019698 starch Nutrition 0.000 claims description 9
- 239000008107 starch Substances 0.000 claims description 9
- 241000196324 Embryophyta Species 0.000 claims description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 241000609240 Ambelania acida Species 0.000 claims description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 2
- 244000025254 Cannabis sativa Species 0.000 claims description 2
- 229920002261 Corn starch Polymers 0.000 claims description 2
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 2
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 2
- 239000005715 Fructose Substances 0.000 claims description 2
- 229930091371 Fructose Natural products 0.000 claims description 2
- RFSUNEUAIZKAJO-ARQDHWQXSA-N Fructose Chemical compound OC[C@H]1O[C@](O)(CO)[C@@H](O)[C@@H]1O RFSUNEUAIZKAJO-ARQDHWQXSA-N 0.000 claims description 2
- 229920000168 Microcrystalline cellulose Polymers 0.000 claims description 2
- 240000002853 Nelumbo nucifera Species 0.000 claims description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 2
- 244000082204 Phyllostachys viridis Species 0.000 claims description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 240000004922 Vigna radiata Species 0.000 claims description 2
- 235000010721 Vigna radiata var radiata Nutrition 0.000 claims description 2
- 235000011469 Vigna radiata var sublobata Nutrition 0.000 claims description 2
- 150000004645 aluminates Chemical class 0.000 claims description 2
- 239000010905 bagasse Substances 0.000 claims description 2
- 239000011425 bamboo Substances 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 239000008120 corn starch Substances 0.000 claims description 2
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 2
- 229940016286 microcrystalline cellulose Drugs 0.000 claims description 2
- 235000019813 microcrystalline cellulose Nutrition 0.000 claims description 2
- 239000008108 microcrystalline cellulose Substances 0.000 claims description 2
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 229920001592 potato starch Polymers 0.000 claims description 2
- 229940100486 rice starch Drugs 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000000600 sorbitol Substances 0.000 claims description 2
- 239000010902 straw Substances 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 239000002023 wood Substances 0.000 claims description 2
- 235000013311 vegetables Nutrition 0.000 claims 1
- 229920002310 Welan gum Polymers 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 description 19
- 239000004033 plastic Substances 0.000 description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 5
- 238000006731 degradation reaction Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000005022 packaging material Substances 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000010813 municipal solid waste Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 229920004889 linear high-density polyethylene Polymers 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 1
- 229920006328 Styrofoam Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229920006238 degradable plastic Polymers 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003349 gelling agent Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002362 mulch Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000008261 styrofoam Substances 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/04—Starch derivatives, e.g. crosslinked derivatives
Definitions
- the invention relates to the field of material preparation, in particular to a preparation method of materials for degradable packaging bags.
- White Pollution is an image title for the phenomenon of waste plastics polluting the environment. It refers to packaging bags, agricultural mulch films, disposable tableware, plastic Plastic products such as bottles are discarded as solid waste after being used. Due to random littering, they are difficult to degrade and cause pollution to the ecological environment and landscape.
- plastic products As a new type of material, plastic products have the advantages of light weight, waterproof, durable, mature production technology and low cost. They are widely used all over the world and show an increasing trend year by year. The growth rate of plastic packaging materials in the world market is higher than that of other packaging materials, and the average annual growth rate of plastic packaging materials in 1990-1995 was 8.9%.
- China is one of the top ten plastic products producing and consuming countries in the world.
- plastic output was 5.19 million tons, and the imported plastic was nearly 6 million tons.
- the total national plastic consumption in that year was about 11 million tons, of which 2.11 million tons were used for packaging.
- Much of the plastic used in packaging is discarded in the environment in the form of used film, plastic bags and Styrofoam tableware. These waste plastic packaging are scattered in urban areas, scenic tourist areas, water bodies, and on both sides of roads, which not only affect the landscape and cause "visual pollution", but also cause potential harm to the ecological environment because of its difficulty in degradation.
- Plastic garbage also stays in nature for a long time, generally up to 200-400 years, and some up to 500 years. Air pollution. Plastic, confetti, and dust fly with the wind. pollute water bodies. The plastic bottles and lunch boxes floating on the river and sea surface, the plastic bags and bread paper hanging on the branches above the water surface not only cause environmental pollution, but also harm the health of animals if they eat the white garbage by mistake. Undigested and starved to death. fire hazard. Almost all white garbage is combustible. In the process of natural stacking, methane and other combustible gases will be produced. Fire accidents that are easily caused by open flames or spontaneous combustion continue to occur, often causing heavy losses.
- the present invention provides a material for a degradable packaging bag and a preparation method thereof, which solves the problems that plastic packaging is difficult to degrade and easily causes ecological pollution such as environmental pollution and marine pollution.
- a material for a degradable packaging bag comprising the following components by weight: 16 parts to 26 parts of polyethylene; 30 parts to 55 parts of diatomaceous earth; 8 to 13 parts of modified starch; and 3 parts of plasticizer- -5 parts; coupling agent 0.8 part--1.5 part; inorganic filler 1 part--2 part; plant fiber 0.2 part--0.5 part, pectin 0.2 part--0.5 part, sodium alginate 0.2 part--0.5 part , 0.5 to 0.8 parts of warm wheel glue; 15-30 parts of purified water; wherein the polyethylene is linear low density polyethylene or a combination of high density polyethylene and linear low density polyethylene;
- the preparation method of the modified starch is as follows: dissolving ordinary starch in sodium hydroxide solution, the quality of the sodium hydroxide solution is 1.5-5 times that of ordinary starch, then adding propylene oxide, and stirring the reaction at 55-65° C. After 3 to 5 hours, maleic anhydride was added, the reaction was stirred for 1 to 2 hours, washed, filtered with suction, and dried to obtain modified starch.
- the starch is at least one of rice starch, corn starch, mung bean starch, lotus root starch and potato starch.
- the plasticizer is one or more of fructose, sorbitol, glycerol, glycerol, low molecular weight polyvinyl alcohol and ethylene glycol mixed in any ratio;
- the plant fiber is selected from one or more of bagasse powder, wood powder, bamboo powder, straw powder, grass fiber and microcrystalline cellulose.
- the plant fiber is a powder with a particle size of 100-600 meshes.
- the preferred particle sizes are 100 mesh, 200 mesh, 300 mesh and 400 mesh.
- the inorganic filler is selected from one or more of talc, calcium carbonate, montmorillonite, and silica;
- the coupling agent is one of aluminate coupling agent or titanate coupling agent.
- the present invention also provides a material preparation method for the degradable packaging bag, comprising the following steps:
- Step 1 Weigh each raw material component by weight, for subsequent use;
- Step 2 Add all the raw materials to the high-speed mixer and mix for 10 to 15 minutes
- Step 3 Add the modified starch into deionized water, continuously stir and heat to 70-90° C., and form a viscous and uniform transparent paste solution after stirring for 1-2 hours, and then add the remaining other components and continue to stir for 1-5 hours to obtain glue. liquid;
- Step 4 Ultrasonic defoaming is performed on the glue obtained in step (2) by using ultrasonic defoaming equipment, the raw materials are continuously mixed and granulated under the condition of 170-190°C, blow-molded under the condition of 150-180°C, and inflated. The ratio is 1.5 to 3.0, and a film is obtained.
- a novel degradable and environmentally friendly packaging material of the present invention has the beneficial effects of being degradable and easy to handle.
- the manufacturing method of the present invention does not need to carry out a water washing procedure, nor does it require strong acid, strong alkali and bleaching agent, so there is no waste water.
- the problem of emissions, without polluting water resources, will help to improve the problems of global warming caused by carbon dioxide (CO2).
- Warm wheel glue is a hydrophilic colloid synthesized by the metabolic process of microorganisms. It exhibits a regular and stable structure in solution. It has a high viscosity at low concentration and has good compatibility with other colloids.
- pectin, sodium alginate and warm wheel glue can greatly improve the effect and enhance the mechanical properties and thermodynamic stability of the product. After the modified starch and composite gelling agent are compounded, the system has better viscoelasticity and stability.
- the present invention uses ultrasonic defoaming equipment to perform ultrasonic treatment on the glue, the purpose is to use ultrasonic cavitation to supersaturate the air dissolved in the glue, and the bubbles rise from the inside of the glue to the surface of the glue, thereby reducing the effect of bubbles adverse effects on the finished product.
- the technical means used in the examples are conventional means well known to those skilled in the art, and the used reagents and products are also commercially available.
- the source and trade name of the reagents used, as well as those necessary to list their components, are indicated when they appear for the first time.
- a material for a degradable packaging bag comprising the following components by weight: 16 parts of polyethylene; 30 parts of diatomaceous earth; 8 parts of modified starch; 5 parts of plasticizer; 1.5 parts of coupling agent; 2 parts of inorganic filler; 0.5 part of plant fiber, 0.5 part of pectin, 0.5 part of sodium alginate, 0.8 part of warm wheel glue; 15-30 parts of purified water.
- the specific preparation method includes the following steps:
- Step 1 Weigh each raw material component by weight, for subsequent use;
- Step 2 Add all the raw materials to the high-speed mixer and mix for 10 to 15 minutes
- Step 3 Add the modified starch into deionized water, continuously stir and heat to 70-90° C., and form a viscous and uniform transparent paste solution after stirring for 1-2 hours, and then add the remaining other components and continue to stir for 1-5 hours to obtain glue. liquid;
- Step 4 Ultrasonic defoaming is performed on the glue obtained in step (2) by using ultrasonic defoaming equipment, the raw materials are continuously mixed and granulated under the condition of 170-190°C, blow-molded under the condition of 150-180°C, and inflated. The ratio is 1.5 to 3.0, and a film is obtained.
- a material for a degradable packaging bag comprising the following components by weight: 26 parts of polyethylene; 55 parts of diatomaceous earth; 13 parts of modified starch; 3 parts of plasticizer; 0.8 part of coupling agent; ; 0.2 part of plant fiber, 0.2 part of pectin, 0.2 part of sodium alginate, 0.5 part of warm wheel glue; 15-30 parts of purified water; wherein said polyethylene is linear low density polyethylene or high density polyethylene and thread
- the combination of type low density polyethylene; the method is the same as that of Example 1.
- a material for a degradable packaging bag comprising the following components by weight: 20 parts of polyethylene; 40 parts of diatomaceous earth; 10 parts of modified starch; 4 parts of plasticizer; 1.2 parts of coupling agent; --2 parts; 0.4 parts of plant fibers, 0.3 parts of pectin, 0.3 parts of sodium alginate, 0.6 parts of warm wheel glue; 15-30 parts of purified water; wherein the polyethylene is linear low density polyethylene or high density polyethylene
- the combination of ethylene and linear low-density polyethylene; the method is the same as that of Example 1.
- the degradable plastic packaging bag material prepared in the embodiment of the present invention has good mechanical properties, light transmittance and natural degradation rate; in addition, in the present invention, starch is used as the overall plastic packaging bag.
- the main matrix of the material thereby ensuring a low production cost for the overall production process.
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Wrappers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
La présente invention concerne le domaine de la préparation de matériau, et concerne spécifiquement un procédé de préparation d'un matériau d'un sac d'emballage biodégradable. Le matériau d'un sac d'emballage biodégradable est caractérisé par : le fait qu'il comprend chacun de ce qui suit en parties en poids : de 16 à 26 parties de polyéthylène ; de 30 à 55 parties de terre de diatomée ; de 8 à 30 parties d'amidon modifié ; de 3 à 5 parties d'agent plastifiant ; de 0,8 à 1,5 partie d'agent de couplage ; de 1 à 2 parties de charge inorganique ; de 0,2 à 0,5 partie de fibre végétale ; de 0,2 à 0,5 partie de pectine ; de 0,2 à 0,5 partie d'alginate de sodium ; de 0,5 à 0,8 partie de gomme Welan ; 20 parties d'eau purifiée ; ledit polyéthylène étant du polyéthylène linéaire faible densité ou une combinaison de polyéthylène haute densité et de polyéthylène linéaire faible densité.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/128832 WO2022099655A1 (fr) | 2020-11-13 | 2020-11-13 | Matériau de sac d'emballage biodégradable et son procédé de préparation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/128832 WO2022099655A1 (fr) | 2020-11-13 | 2020-11-13 | Matériau de sac d'emballage biodégradable et son procédé de préparation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022099655A1 true WO2022099655A1 (fr) | 2022-05-19 |
Family
ID=81602044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2020/128832 WO2022099655A1 (fr) | 2020-11-13 | 2020-11-13 | Matériau de sac d'emballage biodégradable et son procédé de préparation |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2022099655A1 (fr) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115368601A (zh) * | 2022-08-11 | 2022-11-22 | 河南师范大学 | 一种超声改性淀粉基可降解薄膜材料的制备方法 |
| CN115386160A (zh) * | 2022-10-08 | 2022-11-25 | 厦门永晋鸿塑胶工业有限公司 | 一种可降解改性聚乙烯材料及其制备方法 |
| CN116426063A (zh) * | 2023-04-10 | 2023-07-14 | 南通杰锦包装材料有限公司 | 一种防潮可降解塑料袋及其制备方法 |
| CN116987313A (zh) * | 2023-07-31 | 2023-11-03 | 江苏劲松塑料科技有限公司 | 一种环保型食品用包装袋及其制备方法 |
| CN118144201A (zh) * | 2024-03-31 | 2024-06-07 | 杭州中平化工有限公司 | 一种环保可降解塑料的制作工艺 |
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| CN116426063A (zh) * | 2023-04-10 | 2023-07-14 | 南通杰锦包装材料有限公司 | 一种防潮可降解塑料袋及其制备方法 |
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