CN110358264B - Bio-based environment-friendly packaging bag and preparation method thereof - Google Patents
Bio-based environment-friendly packaging bag and preparation method thereof Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/46—Applications of disintegrable, dissolvable or edible materials
- B65D65/466—Bio- or photodegradable packaging materials
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C08J2403/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2403/02—Starch; Degradation products thereof, e.g. dextrin
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
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Abstract
The invention provides a bio-based environment-friendly packaging bag and a preparation method thereof, wherein the packaging bag comprises the following components in parts by weight: 20-40 parts of corn starch, 20-70 parts of PBAT50, 10-20 parts of PLA, 5-10 parts of glycerol, 0.1-1 part of maleic anhydride, 1-5 parts of ethylene-vinyl acetate copolymer, 0.1-1 part of an opening agent, 1-3 parts of an antibacterial agent, 1-3 parts of talcum powder, 1-3 parts of calcium carbonate and 0.1-1 part of a chain extender; the preparation method comprises the following steps: pretreating raw materials, mixing the raw materials, extruding and granulating, mixing granules, extruding and blowing a film, and rolling to prepare a packaging bag; the bio-based environment-friendly packaging bag takes starch, PBAT and PLA as raw materials, so that the degradation performance of the bio-based environment-friendly packaging bag is improved, the bio-based environment-friendly packaging bag is environment-friendly, the cost is reduced, and the consumption of petroleum-based resources is reduced; the antibacterial and mildew-proof performance of the packaging bag is improved, the safety of food is guaranteed, and the packaging bag is high in strength, water-resistant, oil-resistant and durable in use; the packaging bag is manufactured by blow molding and film forming of a film blowing machine, the specification is controllable, the application range is wide, and meanwhile, the packaging bag is beneficial to large-scale industrial production and convenient to popularize.
Description
Technical Field
The invention relates to the technical field of biological packaging materials, in particular to a bio-based environment-friendly packaging bag and a preparation method thereof.
Background
Food packaging materials allowed to be used in China are various, and plastic is widely used in the field of food packaging due to the characteristics of strong plasticity, low production cost, light weight and the like. However, the large volume of plastic used results in the generation of as much as 0.6 million tons of packaging waste per year worldwide, with about 280 million tons of plastic packaging waste per year in our country. The use of plastic food packaging materials not only wastes valuable petroleum resources in China, but also brings great pressure to environmental protection. In order to comply with the trend of environmental protection in the world, the rapid popularization of safe and nontoxic bio-based food packaging materials has become a future development trend of the food packaging industry. Compared with common materials, the bio-based food packaging material has wide sources and no toxicity, does not have potential safety hazard in the use process, and can not cause environmental pollution when being decomposed into inorganic matters by microorganisms after being buried when being used for treating waste packages. Among many biological materials, research and development of materials using renewable plant resources as raw materials are receiving much attention. For example, the bio-based polymer taking starch, plant straw and the like as monomer sources or raw materials has good biodegradability, is inexhaustible, and is abundant and easily available.
Polylactic acid (PLA) is an important biodegradable material, has good degradability, biocompatibility, mechanical properties and transparency, is widely used for packaging food, but has great brittleness. Polybutylene adipate-terephthalate (PBAT) has good toughness, and the combination of the two can realize performance complementation, but the PBAT has aromatic chain segments, so that the degradation efficiency is low. The starch is derived from plant resources and is renewable, so that the cost of the biodegradable material can be reduced, and the degradability can be improved. For example, patent "CN 109161173A" discloses a controllable starch and biodegradable agricultural mulching film, wherein a blend of PLA and PBAT is added with a modified starch-based composite material and sugarcane cellulose, which can reduce production cost, change degradation speed and degradation efficiency, and endow the mulching film with good biodegradability, but the compatibility of PLA and PBAT is not good, so that the mechanical properties of the material are reduced, and the service life is short; as a mulching film for covering crops, the moisture under the film is high, various bacteria are easy to breed, the antibacterial performance is not high, and in addition, the films are easy to bond in the film rolling process. The patent "CN 109111709A" discloses a PLA/PBAT biodegradable composite material containing corn starch and a preparation method thereof, which comprises PLA, PBAT, corn starch subjected to coupling treatment, DCP and BPO, so that the compatibility of the PBAT and the PLA is enhanced, and the compatibility of the starch and the PLA is also enhanced, but the antibacterial property is not high.
Disclosure of Invention
In order to overcome the following problems in the prior art, such as poor antibacterial performance, low mechanical property, short service life and the like, the invention provides a bio-based environment-friendly packaging bag, which is characterized in that: comprises the following components in parts by weight: 20-40 parts of corn starch, 78-70 parts of PBAT50, 10-20 parts of PLA, 5-10 parts of glycerol, 0.1-1 part of maleic anhydride, 1-5 parts of ethylene-vinyl acetate copolymer, 0.1-1 part of an opening agent, 1-3 parts of an antibacterial agent, 1-3 parts of talcum powder, 1-3 parts of calcium carbonate and 0.1-1 part of a chain extender.
On the basis, the chain extender is one or more of ADR-4370 or ADR-4380.
On the basis, the opening agent is one or more of oleamide or erucamide.
On the basis, the antibacterial agent is one or more of zinc oxide, copper oxide and ammonium dihydrogen phosphate.
A preparation method of a bio-based environment-friendly packaging bag is characterized by comprising the following steps: comprises the following steps:
s1: performing vacuum drying pretreatment on corn starch, PBAT and PLA;
s2: adding the corn starch and the PBAT which are subjected to vacuum drying pretreatment into a high-speed mixer, simultaneously adding glycerol, maleic anhydride, an opening agent, talcum powder and calcium carbonate, and uniformly mixing;
s3: adding the uniformly mixed raw materials in the step S2 into a hopper of a double-screw extruder, carrying out double-screw melting and conveying, and then extruding and granulating to obtain granules with the diameter of 3 mm;
s4: adding the granules obtained in the step S3 and PLA subjected to vacuum drying pretreatment into a high-speed mixer, adding the ethylene-vinyl acetate copolymer and the chain extender at the same time, and uniformly mixing;
s5: adding the uniformly mixed material obtained in the step S4 into a hopper of a film blowing machine, and extruding and blowing the film after the material is melted and conveyed by a screw of the film blowing machine;
s6: and (5) rolling the film in the step S5 to prepare a packaging bag.
On the basis, the temperature of each section of the double screw in the step S3 is controlled at 155-165 ℃.
On the basis, the temperature of each section of the screw in the step S5 is controlled at 145-170 ℃.
On the basis, the temperature of the high-speed mixing in the S2 and S4 steps is 110-130 ℃.
On this basis, the drying temperature of PSAT and PLA in the S1 step was 80 ℃ for 4 hours.
On this basis, the drying temperature of the corn starch in the step S1 was 120 ℃ for 8 hours.
Compared with the prior art, the invention has the beneficial effects that:
1. the bio-based environment-friendly packaging bag takes starch, PBAT and PLA as raw materials, and the addition of the starch reduces the consumption of petroleum-based resources, so that the amount of the materials is reduced from the source, and the cost is reduced; the starch is modified by maleic anhydride, so that the compatibility of the starch with PBAT and PLA can be improved, the degradation performance of the packaging bag can be improved, the packaging bag can be subjected to composting treatment under specific conditions after use, can be completely degraded by microorganisms, and generates CO 2 And H 2 And O, can also be incinerated, and no toxic gas such as nitride or sulfide is generated during incineration, so that the environment is protected.
2. The bio-based environment-friendly packaging bag disclosed by the invention is added with the components of the antibacterial agent, so that the antibacterial and mildew-proof performances of the packaging bag are further improved, and the safety of food is ensured.
3. The invention adopts ethylene-vinyl acetate as the compatilizer, so that PLA and PBAT have better compatibility, and PBAT and PLA can have complementary performance, so that the bio-based environment-friendly packaging bag has better toughness.
4. A small amount of chain extender is added into the bio-based environment-friendly packaging bag for improving the molecular weight of the polymer, so that the packaging bag has higher mechanical property and does not influence the degradation property of the packaging bag; a small amount of opening agent is added, so that the packaging bag can resist water and oil, and the service life of the packaging bag is prolonged.
5. The invention forms a film by blowing through a film blowing machine, has controllable film thickness and specification, can be made into packaging bags with various specifications according to requirements, has wide application range, is beneficial to large-scale industrial production and is convenient to popularize.
Detailed Description
The present invention will be described in further detail with reference to examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1:
the bio-based environment-friendly packaging bag provided by the embodiment 1 of the invention comprises the following components in parts by weight: 25 parts of corn starch, 55 parts of PBAT, 15 parts of PLA, 5 parts of glycerol, 0.3 part of maleic anhydride, 2 parts of ethylene-vinyl acetate copolymer, 0.2 part of oleamide, 1 part of talcum powder, 1 part of calcium carbonate, 1 part of ADR-43700.2 part and 1 part of zinc oxide.
Wherein: the corn starch, the PBAT and the PLA are used as raw materials, and the addition of the corn starch reduces the consumption of petroleum-based resources, so that the amount of the materials is reduced from the source, and the cost is reduced; the maleic anhydride is a corn starch modifier, can improve the compatibility of the corn starch with PBAT and PLA and improve the degradation performance of the packaging bag, and after the packaging bag is used, the packaging bag can be composted under specific conditions and can be completely degraded by microorganisms to generate CO 2 And H 2 O, can also be incinerated, and no toxic gas such as nitride or sulfide is generated during incineration, so that the environment is protected; ethylene-vinyl acetate copolymer is used as a compatilizer to enable PLA and PBAT has better compatibility, PBAT and PLA can have complementary performance, so that the packaging bag has better toughness; the oleamide is used as an opening agent, so that the water resistance and oil resistance of the packaging bag can be improved; ADR-4370 is a chain extender, and the molecular weight of the polymer is improved while the degradation performance of the chain extender is not influenced, so that the packaging bag disclosed by the invention has higher mechanical property, and the service life of the packaging bag is prolonged; the zinc oxide is an antibacterial agent, so that the antibacterial and mildewproof performance of the invention is improved, and the safety of food is ensured.
Example 2:
the bio-based environment-friendly packaging bag provided by the embodiment 2 of the invention comprises the following components in parts by weight: 25 parts of corn starch, 60 parts of PBAT, 15 parts of PLA, 5 parts of glycerol, 0.2 part of maleic anhydride, 2 parts of ethylene-vinyl acetate copolymer, 0.3 part of oleamide, 1 part of talcum powder, 1 part of calcium carbonate, 1 part of ADR-43700.2 part and 1 part of zinc oxide.
Wherein: the corn starch, the PBAT and the PLA are used as raw materials, and the addition of the corn starch reduces the consumption of petroleum-based resources, so that the amount of the materials is reduced from the source, and the cost is reduced; the maleic anhydride is a corn starch modifier, can improve the compatibility of the corn starch with PBAT and PLA and improve the degradation performance of the packaging bag, and after the packaging bag is used, the packaging bag can be composted under specific conditions and can be completely degraded by microorganisms to generate CO 2 And H 2 O, can also be incinerated, and no toxic gas such as nitride or sulfide is generated during incineration, so that the environment is protected; the ethylene-vinyl acetate copolymer is a compatilizer, so that the PLA and the PBAT have good compatibility, and the PBAT and the PLA can have complementary performance, so that the packaging bag disclosed by the invention has good toughness; the oleamide is used as an opening agent, so that the water resistance and oil resistance of the packaging bag can be improved; the ADR-4370 is a chain extender, and the molecular weight of the polymer is improved while the degradation performance of the ADR-4370 is not influenced, so that the packaging bag disclosed by the invention has higher mechanical property, and the service life of the packaging bag is prolonged; the zinc oxide is an antibacterial agent, so that the antibacterial and mildewproof performance of the invention is improved, and the safety of food is ensured.
Example 3:
the bio-based environment-friendly packaging bag provided by the embodiment 3 of the invention comprises the following components in parts by weight: 30 parts of corn starch, 50 parts of PBAT, 10 parts of PLA, 10 parts of glycerol, 0.2 part of maleic anhydride, 3 parts of ethylene-vinyl acetate copolymer, 0.2 part of oleamide, 2 parts of talcum powder, 1 part of calcium carbonate, ADR-43700.2 parts and 2 parts of zinc oxide.
Wherein: the corn starch, the PBAT and the PLA are used as raw materials, and the addition of the corn starch reduces the consumption of petroleum-based resources, so that the amount of the materials is reduced from the source, and the cost is reduced; the maleic anhydride is a corn starch modifier, can improve the compatibility of the corn starch with PBAT and PLA and improve the degradation performance of the packaging bag, and after the packaging bag is used, the packaging bag can be composted under specific conditions and can be completely degraded by microorganisms to generate CO 2 And H 2 O, can also be incinerated, and no toxic gas such as nitride or sulfide is generated during incineration, so that the environment is protected; the ethylene-vinyl acetate copolymer is a compatilizer, so that the PLA and the PBAT have good compatibility, and the PBAT and the PLA can have complementary performance, so that the packaging bag disclosed by the invention has good toughness; the oleamide is used as an opening agent, so that the water resistance and oil resistance of the packaging bag can be improved; ADR-4370 is a chain extender, and the molecular weight of the polymer is improved while the degradation performance of the chain extender is not influenced, so that the packaging bag disclosed by the invention has higher mechanical property, and the service life of the packaging bag is prolonged; the zinc oxide is an antibacterial agent, so that the antibacterial and mildewproof performance of the invention is improved, and the safety of food is ensured.
Example 4:
the bio-based environment-friendly packaging bag provided by the embodiment 4 of the invention comprises the following components in parts by weight: 30 parts of corn starch, 55 parts of PBAT, 10 parts of PLA, 10 parts of glycerol, 0.3 part of maleic anhydride, 2 parts of ethylene-vinyl acetate copolymer, 0.2 part of oleamide, 2 parts of talcum powder, 1 part of calcium carbonate, ADR-43700.2 parts and 2 parts of zinc oxide.
Wherein: the corn starch, the PBAT and the PLA are used as raw materials, and the addition of the corn starch reduces the consumption of petroleum-based resources, so that the amount of the materials is reduced from the source, and the cost is reduced; the maleic anhydride is corn starchThe modifier can improve the compatibility of the corn starch with PBAT and PLA and improve the degradation performance of the packaging bag, and after the packaging bag is used, the packaging bag can be composted under specific conditions and can be completely degraded by microorganisms to generate CO 2 And H 2 O, can also be incinerated, and no toxic gas such as nitride or sulfide is generated during incineration, so that the environment is protected; the ethylene-vinyl acetate copolymer is used as a compatilizer, so that the PLA and the PBAT have good compatibility, and the PBAT and the PLA can be complemented in performance, so that the packaging bag disclosed by the invention has good toughness; the oleamide is used as an opening agent, so that the water resistance and oil resistance of the packaging bag can be improved; ADR-4370 is a chain extender, and the molecular weight of the polymer is improved while the degradation performance of the chain extender is not influenced, so that the packaging bag disclosed by the invention has higher mechanical property, and the service life of the packaging bag is prolonged; the zinc oxide is an antibacterial agent, so that the antibacterial and mildewproof performance of the invention is improved, and the safety of food is ensured.
Table 1 shows the different performance parameters of examples 1-4 after different bio-based environmental protection packages were obtained:
table 1:
example 5:
the preparation method of the bio-based environment-friendly packaging bag provided by the embodiment 5 of the invention and any one of the embodiments 1, 2, 3 or 4 comprises the following steps:
s1: putting corn starch into a vacuum drying oven at 120 ℃ for drying for 8h, and putting PBAT and PLA into a vacuum drying oven at 80 ℃ for drying for 4h for later use;
s2: adding the corn starch and the PBAT which are subjected to vacuum drying pretreatment into a high-speed mixer, adding glycerol, maleic anhydride, oleamide, talcum powder and calcium carbonate, and uniformly mixing;
s3: adding the uniformly mixed raw materials in the step S2 into a charging barrel of a double-screw extruder, controlling the temperature of a screw feeding section to be 155 ℃, the temperature of a compression section to be 165 ℃ and the temperature of a homogenization section to be 165 ℃, and performing melt extrusion by a screw and granulation to obtain granules with the diameter of 3 mm;
s4: adding the granules obtained in the step S3 and vacuum-dried PLA into a high-speed mixer, adding ethylene-vinyl acetate copolymer and ADR-4370, and uniformly mixing;
s5: adding the uniformly mixed material obtained in the step S4 into a hopper of a film blowing machine, controlling the temperature of a screw feeding section to be 150 ℃, the temperature of a compression section to be 160 ℃, the temperature of a homogenization section to be 160 ℃, and performing melt extrusion through a screw to form a film through blow molding;
s6: and rolling the film to prepare the packaging bag.
The invention forms a film by blowing through a film blowing machine, has controllable film thickness and specification, can be made into packaging bags with various specifications according to requirements, has wide application range, is beneficial to large-scale industrial production and is convenient to popularize.
Example 6:
the preparation method of the bio-based environment-friendly packaging bag provided by the embodiment 6 of the invention and any one of the embodiments 1, 2, 3 or 4 comprises the following steps:
s1: putting corn starch into a vacuum drying oven at 120 ℃ for drying for 8h, and putting PBAT and PLA into a vacuum drying oven at 80 ℃ for drying for 4h for later use;
s2: adding the corn starch and the PBAT which are subjected to vacuum drying pretreatment into a high-speed mixer, adding glycerol, maleic anhydride, oleamide, talcum powder and calcium carbonate, and uniformly mixing;
s3: adding the uniformly mixed raw materials in the step S2 into a charging barrel of a double-screw extruder, controlling the temperature of a screw feeding section to be 160 ℃, the temperature of a compression section to be 165 ℃ and the temperature of a homogenization section to be 165 ℃, and performing melt extrusion by a screw and granulation to obtain granules with the diameter of 3 mm;
s4: adding the granules obtained in the step S3 and vacuum-dried PLA into a high-speed mixer, adding ethylene-vinyl acetate copolymer and ADR-4370, and uniformly mixing;
s5: adding the uniformly mixed material obtained in the step S4 into a hopper of a film blowing machine, controlling the temperature of a screw feeding section to be 155 ℃, the temperature of a compression section to be 165 ℃ and the temperature of a homogenization section to be 165 ℃, and performing melt extrusion by a screw to form a film through blow molding;
s6: and rolling the film to prepare the packaging bag.
The invention forms a film by blowing through a film blowing machine, has controllable film thickness and specification, can be made into packaging bags with various specifications according to requirements, has wide application range, is beneficial to large-scale industrial production and is convenient to popularize.
Example 7:
the preparation method of the bio-based environment-friendly packaging bag provided by the embodiment 7 of the invention and used in any one of the embodiments 1, 2, 3 or 4 comprises the following steps:
s1: putting corn starch into a vacuum drying oven at 120 ℃ for drying for 8h, and putting PBAT and PLA into a vacuum drying oven at 80 ℃ for drying for 4h for later use;
s2: adding the corn starch and the PBAT which are subjected to vacuum drying pretreatment into a high-speed mixer, adding glycerol, maleic anhydride, oleamide, talcum powder and calcium carbonate, and uniformly mixing;
s3: adding the uniformly mixed raw materials in the step S2 into a charging barrel of a double-screw extruder, controlling the temperature of a screw feeding section to be 160 ℃, the temperature of a compression section to be 165 ℃ and the temperature of a homogenization section to be 160 ℃, and performing melt extrusion by a screw and granulation to obtain granules with the diameter of 3 mm;
s4: adding the granules obtained in the step S3 and vacuum-dried PLA into a high-speed mixer, adding ethylene-vinyl acetate copolymer and ADR-4370, and uniformly mixing;
s5: adding the uniformly mixed material obtained in the step S4 into a hopper of a film blowing machine, controlling the temperature of a screw feeding section to be 155 ℃, the temperature of a compression section to be 165 ℃ and the temperature of a homogenization section to be 170 ℃, and performing melt extrusion by a screw to form a film through blow molding;
s6: and rolling the film to prepare the packaging bag.
The invention forms a film by blowing through a film blowing machine, has controllable film thickness and specification, can be made into packaging bags with various specifications according to requirements, has wide application range, is beneficial to large-scale industrial production and is convenient to popularize.
While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A preparation method of a bio-based environment-friendly packaging bag is characterized by comprising the following steps:
s1: performing vacuum drying pretreatment on corn starch, PBAT and PLA;
s2: adding the corn starch and the PBAT which are subjected to vacuum drying pretreatment into a high-speed mixer, simultaneously adding glycerol, maleic anhydride, oleamide, talcum powder and calcium carbonate, and uniformly mixing;
s3: adding the uniformly mixed raw materials in the step S2 into a hopper of a double-screw extruder, carrying out double-screw melting and conveying, and then extruding and granulating to obtain granules with the diameter of 3 mm;
s4: adding the granules obtained in the step S3 and PLA subjected to vacuum drying pretreatment into a high-speed mixer, and simultaneously adding ethylene-vinyl acetate copolymer and ADR-4370, and uniformly mixing;
s5: adding the uniformly mixed material obtained in the step S4 into a hopper of a film blowing machine, and extruding and blowing the film after the material is melted and conveyed by a screw of the film blowing machine;
s6: and (5) rolling the film in the step S5 to prepare a packaging bag.
2. The method as claimed in claim 1, wherein the temperature of each section of the twin screw in the step of the method S3 is controlled at 155-165 ℃.
3. The method as claimed in claim 1, wherein the temperature of each section of the screw in the step of the method S5 is controlled at 145-170 ℃.
4. The method as claimed in claim 1, wherein the temperature of the high-speed mixing in the steps S2 and S4 is 110-130 ℃.
5. The method of claim 1, wherein the drying temperature of the PBAT and the PLA in the step of the method S1 is 80 ℃ and the drying time is 4 hours.
6. The method of claim 1, wherein the corn starch is dried at a temperature of 120 ℃ for 8 hours in step S1.
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| CN112759901A (en) * | 2020-12-29 | 2021-05-07 | 四川坤源杰环保科技有限公司 | Micro-crystallization toughening modified PBS or PBAT biodegradable composite material |
| CN112795149A (en) * | 2020-12-30 | 2021-05-14 | 四川天星智能包装股份有限公司 | Biodegradable polyester PBAT composite material and preparation method thereof |
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| CN113956625A (en) * | 2021-11-04 | 2022-01-21 | 浙江通力新材料科技股份有限公司 | Antibacterial biodegradable plastic film and preparation method thereof |
| CN114350031B (en) * | 2022-01-21 | 2023-08-04 | 杭州泽同新材料科技有限公司 | Bio-based biodegradable packaging material |
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| CN114605729A (en) * | 2022-03-29 | 2022-06-10 | 晋江集力鞋业有限公司 | Wear-resistant antibacterial degradable polymer composite material and preparation method thereof |
| CN114851672B (en) * | 2022-07-07 | 2022-09-02 | 山东兰德英科新材料科技有限公司 | Method for preparing infusion bag by adopting biodegradable infusion bag special material |
| CN115651374B (en) * | 2022-10-24 | 2023-10-24 | 福建亮点印务有限公司 | Environment-friendly antibacterial food-grade packaging bag and preparation method thereof |
| CN118496634B (en) * | 2024-06-04 | 2024-11-19 | 广东威雅包装印刷有限公司 | Polymer type food packaging bag and preparation method thereof |
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| CN107556536B (en) * | 2017-09-12 | 2021-02-12 | 江苏金聚合金材料有限公司 | Low-cost bio-based fully-degradable film and preparation method thereof |
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Denomination of invention: A bio-based environmental protection packaging bag and its preparation method Effective date of registration: 20230227 Granted publication date: 20220809 Pledgee: Jiangsu Jiangnan Rural Commercial Bank Limited by Share Ltd. Pledgor: CHANGZHOU LONGJUN SKYPURL ENVIRONMENT PROTECTION TECHNOLOGY CO.,LTD. Registration number: Y2023320000110 |