CN114836015A - Formula and production process of degradable plastic bag - Google Patents
Formula and production process of degradable plastic bag Download PDFInfo
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- CN114836015A CN114836015A CN202210516710.4A CN202210516710A CN114836015A CN 114836015 A CN114836015 A CN 114836015A CN 202210516710 A CN202210516710 A CN 202210516710A CN 114836015 A CN114836015 A CN 114836015A
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- degradable plastic
- coupling agent
- plastic bag
- butanediol
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- 229920006238 degradable plastic Polymers 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000009472 formulation Methods 0.000 title claims description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 57
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 38
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 38
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 38
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000007822 coupling agent Substances 0.000 claims abstract description 23
- 229920002472 Starch Polymers 0.000 claims abstract description 22
- -1 fatty acid ester Chemical class 0.000 claims abstract description 22
- 239000008107 starch Substances 0.000 claims abstract description 22
- 235000019698 starch Nutrition 0.000 claims abstract description 22
- 229920003023 plastic Polymers 0.000 claims abstract description 21
- 239000004033 plastic Substances 0.000 claims abstract description 21
- WSQZNZLOZXSBHA-UHFFFAOYSA-N 3,8-dioxabicyclo[8.2.2]tetradeca-1(12),10,13-triene-2,9-dione Chemical compound O=C1OCCCCOC(=O)C2=CC=C1C=C2 WSQZNZLOZXSBHA-UHFFFAOYSA-N 0.000 claims abstract description 19
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 19
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 19
- 239000000194 fatty acid Substances 0.000 claims abstract description 19
- 229930195729 fatty acid Natural products 0.000 claims abstract description 19
- 239000000314 lubricant Substances 0.000 claims abstract description 19
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 19
- 239000004626 polylactic acid Substances 0.000 claims abstract description 19
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 19
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 19
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims description 21
- 239000011876 fused mixture Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 13
- 239000002985 plastic film Substances 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 8
- 238000004806 packaging method and process Methods 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 8
- 230000015556 catabolic process Effects 0.000 abstract description 5
- 238000006731 degradation reaction Methods 0.000 abstract description 5
- 239000001569 carbon dioxide Substances 0.000 abstract description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 4
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 abstract description 4
- 231100000252 nontoxic Toxicity 0.000 abstract description 3
- 230000003000 nontoxic effect Effects 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 3
- 241000196324 Embryophyta Species 0.000 description 14
- 239000008187 granular material Substances 0.000 description 6
- 229920000426 Microplastic Polymers 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 241000609240 Ambelania acida Species 0.000 description 1
- 229920002261 Corn starch Polymers 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 244000061456 Solanum tuberosum Species 0.000 description 1
- 235000002595 Solanum tuberosum Nutrition 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010902 straw 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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
- B29B9/065—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion under-water, e.g. underwater pelletizers
-
- 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
- C08L3/02—Starch; Degradation products thereof, e.g. dextrin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Wrappers (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
The invention discloses a formula of a degradable plastic bag and a production process thereof, and relates to the technical field of plastic products. The composition comprises the following components in parts by weight: 20-30 parts of polylactic acid, 1-5 parts of coupling agent, 20-25 parts of plant starch, 15-20 parts of 1, 4-butanediol, 15-18 parts of butylene terephthalate alcohol, 0.2-0.4 part of lubricant, 3-5 parts of glycerol, 0.5-1 part of fatty acid ester, 0.1-0.2 part of calcium carbonate, 0.2-0.3 part of silicon dioxide and 0.2-0.4 part of titanium dioxide. The preparation process is simple, the prepared degradable plastic bag is high in degradation speed, can be completely degraded, produces carbon dioxide and water, is non-toxic after degradation, and has no influence on the environment.
Description
Technical Field
The invention relates to the technical field of plastic products, in particular to a formula of a degradable plastic bag and a production process thereof.
Background
The plastic bag develops towards green, and is closely related to the concern of people on environmental protection. Since the 70's of the 20 th century, green plastic bags have been developed in many countries. Since polyethylene and polypropylene are mainly polyolefins, they cannot be decomposed in a short time. Finally, scientists have studied and synthesized a series of polyester materials which can be decomposed by microorganisms, and some renewable resources (such as straw, bagasse, corn starch and the like) to extract and synthesize green materials, so as to prepare the really biodegradable green plastic bags.
In conclusion, the invention designs a formula and a production process of a degradable plastic bag.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a formula of a degradable plastic bag and a production process thereof, the preparation process is simple, the prepared degradable plastic bag is high in degradation speed, can be completely degraded to produce carbon dioxide and water, and is nontoxic after being degraded and has no influence on the environment.
In order to achieve the purpose, the invention is realized by the following technical scheme: the formula of the degradable plastic bag comprises the following components in parts by weight: 20-30 parts of polylactic acid, 1-5 parts of coupling agent, 20-25 parts of plant starch, 15-20 parts of 1, 4-butanediol, 15-18 parts of butylene terephthalate alcohol, 0.2-0.4 part of lubricant, 3-5 parts of glycerol, 0.5-1 part of fatty acid ester, 0.1-0.2 part of calcium carbonate, 0.2-0.3 part of silicon dioxide and 0.2-0.4 part of titanium dioxide.
Preferably, the formula of the degradable plastic bag comprises the following components in parts by weight: 20 parts of polylactic acid, 1 part of coupling agent, 20 parts of plant starch, 15 parts of 1, 4-butanediol, 15 parts of butylene terephthalate alcohol, 0.2 part of lubricating agent, 3 parts of glycerol, 0.5 part of fatty acid ester, 0.1 part of calcium carbonate, 0.2 part of silicon dioxide and 0.2 part of titanium dioxide.
Preferably, the formula of the degradable plastic bag comprises the following components in parts by weight: 25 parts of polylactic acid, 3 parts of coupling agent, 22 parts of plant starch, 18 parts of 1, 4-butanediol, 16 parts of butylene terephthalate alcohol, 0.3 part of lubricant, 4 parts of glycerol, 0.8 part of fatty acid ester, 0.1 part of calcium carbonate, 0.2 part of silicon dioxide and 0.3 part of titanium dioxide.
Preferably, the formula of the degradable plastic bag comprises the following components in parts by weight: 30 parts of polylactic acid, 5 parts of coupling agent, 25 parts of plant starch, 20 parts of 1, 4-butanediol, 18 parts of butylene terephthalate alcohol, 0.4 part of lubricant, 5 parts of glycerol, 1 part of fatty acid ester, 0.2 part of calcium carbonate, 0.3 part of silicon dioxide and 0.4 part of titanium dioxide.
The coupling agent is a silane coupling agent.
A production process of a degradable plastic bag comprises the following steps:
1. mixing the polylactic acid, the coupling agent, the plant starch, the 1, 4-butanediol, the butylene terephthalate alcohol, the lubricant, the glycerol, the fatty acid ester, the calcium carbonate, the silicon dioxide and the titanium dioxide in parts by weight to prepare a mixture;
2. and then sending the mixture into an underwater granulator, pressurizing the fused mixture to 5.0MPa through a double-screw extruder, filtering out possibly existing impurities through a screen changer, then enabling the impurities to enter a plurality of flow channels of the template through flow division, enabling the materials to flow to a discharge end at an accelerated speed due to the gradual reduction of the diameter of the flow channels, finally enabling the materials to enter a granulating water chamber in a linear mode through a die hole, cooling the fused mixture by particles at 50-70 ℃ instantly, cutting the fused mixture into plastic particles by a high-speed rotary cutter tightly attached to the surface of the template, finishing the whole granulating process, and finally conveying the particles to a centrifugal dryer by cooling water for dehydration and drying.
3. Heating and melting the plastic particles obtained in the step 2, extruding the plastic particles by an extruder, and producing a degradable plastic film by vertically blowing the film;
4. the degradable plastic film can be made into various packaging bags according to the requirements.
The invention has the beneficial effects that: the preparation process is simple and reasonable, the prepared degradable plastic bag is high in degradation speed, can be completely degraded to produce carbon dioxide and water, is nontoxic after being degraded, and has no influence on the environment.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
The specific implementation mode adopts the following technical scheme: the formula of the degradable plastic bag comprises the following components in parts by weight: 20-30 parts of polylactic acid, 1-5 parts of coupling agent, 20-25 parts of plant starch, 15-20 parts of 1, 4-butanediol, 15-18 parts of butylene terephthalate alcohol, 0.2-0.4 part of lubricant, 3-5 parts of glycerol, 0.5-1 part of fatty acid ester, 0.1-0.2 part of calcium carbonate, 0.2-0.3 part of silicon dioxide and 0.2-0.4 part of titanium dioxide.
The coupling agent is a silane coupling agent.
A production process of a degradable plastic bag comprises the following steps:
1. mixing the polylactic acid, the coupling agent, the plant starch, the 1, 4-butanediol, the butylene terephthalate alcohol, the lubricant, the glycerol, the fatty acid ester, the calcium carbonate, the silicon dioxide and the titanium dioxide in parts by weight to prepare a mixture;
2. and then sending the mixture into an underwater granulator, pressurizing the fused mixture to 5.0MPa through a double-screw extruder, filtering out possibly existing impurities through a screen changer, then enabling the impurities to enter a plurality of flow channels of the template through flow division, enabling the materials to flow to a discharge end at an accelerated speed due to the gradual reduction of the diameter of the flow channels, finally enabling the materials to enter a granulating water chamber in a linear mode through a die hole, cooling the fused mixture by particles at 50-70 ℃ instantly, cutting the fused mixture into plastic particles by a high-speed rotary cutter tightly attached to the surface of the template, finishing the whole granulating process, and finally conveying the particles to a centrifugal dryer by cooling water for dehydration and drying.
3. Heating and melting the plastic particles obtained in the step 2, extruding the plastic particles by an extruder, and producing a degradable plastic film by vertically blowing the film;
4. the degradable plastic film can be made into various packaging bags according to the requirements.
The main components of the starch degradable resin of the embodiment are plant starch, degradable resin, other related coupling agents, additives and other auxiliary materials. The starch is mainly extracted from corn, potato and other crops. The production process comprises the steps of extruding, granulating in water, cooling by water circulation, and blowing the film vertically to produce the biodegradable film, and various packaging products can be designed according to requirements. The packaging bag has clear transparency, good heat resistance, high mechanical strength, stronger bearing capacity and no toxicity, can be completely degraded into carbon dioxide and water under the condition of burying soil within 180 days, can replace the current common plastic (polyethylene) film material, has excellent degradation performance and environmental protection characteristic, creates a clean, fresh and environment-friendly living space for human beings,
example 1: the formula of the degradable plastic bag comprises the following components in parts by weight: 20 parts of polylactic acid, 1 part of coupling agent, 20 parts of plant starch, 15 parts of 1, 4-butanediol, 15 parts of butylene terephthalate alcohol, 0.2 part of lubricating agent, 3 parts of glycerol, 0.5 part of fatty acid ester, 0.1 part of calcium carbonate, 0.2 part of silicon dioxide and 0.2 part of titanium dioxide.
A production process of a degradable plastic bag comprises the following steps:
1. mixing 20 parts of polylactic acid, 1 part of coupling agent, 20 parts of plant starch, 15 parts of 1, 4-butanediol, 15 parts of butylene terephthalate alcohol, 0.2 part of lubricant, 3 parts of glycerol, 0.5 part of fatty acid ester, 0.1 part of calcium carbonate, 0.2 part of silicon dioxide and 0.2 part of titanium dioxide to prepare a mixture;
2. sending the mixture into underwater granulator again, the fused mixture is through the double screw extruder pressure boost to 5.0MPa, filter through the trade net ware and get into a plurality of runners of template through the reposition of redundant personnel after the impurity that probably exists, the material is because runner diameter diminishes gradually with higher speed to flow to the discharge end, finally get into the eager grain hydroecium with the threadiness through the nib, the fused mixture is cooled by 50 ℃ of granule water in the twinkling of an eye, and cut into plastic pellet by the high-speed gyration cutter of closely laminating on the template surface, accomplish whole granulation process so far, the granule is finally carried centrifugal drier by the cooling water and is dehydrated drying.
3. Heating and melting the plastic particles obtained in the step 2, extruding the plastic particles by an extruder, and producing a degradable plastic film by vertically blowing the film;
4. the degradable plastic film can be made into various packaging bags according to the requirements.
Example 2: the formula of the degradable plastic bag comprises the following components in parts by weight: 25 parts of polylactic acid, 3 parts of coupling agent, 22 parts of plant starch, 18 parts of 1, 4-butanediol, 16 parts of butylene terephthalate alcohol, 0.3 part of lubricant, 4 parts of glycerol, 0.8 part of fatty acid ester, 0.1 part of calcium carbonate, 0.2 part of silicon dioxide and 0.3 part of titanium dioxide.
A production process of a degradable plastic bag comprises the following steps:
1. mixing 25 parts of polylactic acid, 3 parts of a coupling agent, 22 parts of plant starch, 18 parts of 1, 4-butanediol, 16 parts of butylene terephthalate alcohol, 0.3 part of a lubricant, 4 parts of glycerol, 0.8 part of fatty acid ester, 0.1 part of calcium carbonate, 0.2 part of silicon dioxide and 0.3 part of titanium dioxide to prepare a mixture;
2. sending the mixture into underwater granulator again, the fused mixture is through the double screw extruder pressure boost to 5.0MPa, filter through the trade net ware and get into a plurality of runners of template through the reposition of redundant personnel after the impurity that probably exists, the material is because runner diameter diminishes gradually with higher speed to flow to the discharge end, finally get into the eager grain hydroecium with the threadiness through the nib, the fused mixture is cooled by 60 ℃'s granule water in the twinkling of an eye, and cut into plastic pellet by the high-speed gyration cutter of closely laminating on the template surface, accomplish whole granulation process so far, the granule is finally carried centrifugal drier by the cooling water and is dehydrated drying.
3. Heating and melting the plastic particles obtained in the step 2, extruding the plastic particles by an extruder, and producing a degradable plastic film by vertically blowing the film;
4. the degradable plastic film can be made into various packaging bags according to the requirements.
Example 3: the formula of the degradable plastic bag comprises the following components in parts by weight: 30 parts of polylactic acid, 5 parts of coupling agent, 25 parts of plant starch, 20 parts of 1, 4-butanediol, 18 parts of butylene terephthalate alcohol, 0.4 part of lubricant, 5 parts of glycerol, 1 part of fatty acid ester, 0.2 part of calcium carbonate, 0.3 part of silicon dioxide and 0.4 part of titanium dioxide.
A production process of a degradable plastic bag comprises the following steps:
1. mixing 30 parts of polylactic acid, 5 parts of coupling agent, 25 parts of plant starch, 20 parts of 1, 4-butanediol, 18 parts of butylene terephthalate alcohol, 0.4 part of lubricant, 5 parts of glycerol, 1 part of fatty acid ester, 0.2 part of calcium carbonate, 0.3 part of silicon dioxide and 0.4 part of titanium dioxide to prepare a mixture;
2. sending the mixture into the pelleter under water again, the fused mixture is 5.0MPa through the double screw extruder pressure boost, filter through the trade net ware and get into a plurality of runners of template through the reposition of redundant personnel after the impurity that probably exists, the material is because runner diameter diminishes gradually with higher speed to flow to the discharge end, finally get into the eager grain hydroecium with the threadiness through the nib, the fused mixture is cooled by 70 ℃'s granule water in the twinkling of an eye, and cut into plastic pellet by the high-speed gyration cutter of inseparable laminating on the template surface, accomplish whole granulation process so far, the granule is finally carried centrifugal drier by the cooling water and is dehydrated drying.
3. Heating and melting the plastic particles obtained in the step 2, extruding the plastic particles by an extruder, and producing a degradable plastic film by vertically blowing the film;
4. the degradable plastic film can be made into various packaging bags according to the requirements.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The formula of the degradable plastic bag is characterized by comprising the following components in parts by weight: 20-30 parts of polylactic acid, 1-5 parts of coupling agent, 20-25 parts of plant starch, 15-20 parts of 1, 4-butanediol, 15-18 parts of butylene terephthalate alcohol, 0.2-0.4 part of lubricant, 3-5 parts of glycerol, 0.5-1 part of fatty acid ester, 0.1-0.2 part of calcium carbonate, 0.2-0.3 part of silicon dioxide and 0.2-0.4 part of titanium dioxide.
2. The formula of the degradable plastic bag according to claim 1, which is characterized by comprising the following components in parts by weight: 20 parts of polylactic acid, 1 part of coupling agent, 20 parts of plant starch, 15 parts of 1, 4-butanediol, 15 parts of butylene terephthalate alcohol, 0.2 part of lubricating agent, 3 parts of glycerol, 0.5 part of fatty acid ester, 0.1 part of calcium carbonate, 0.2 part of silicon dioxide and 0.2 part of titanium dioxide.
3. The formula of the degradable plastic bag according to claim 1, which is characterized by comprising the following components in parts by weight: 25 parts of polylactic acid, 3 parts of coupling agent, 22 parts of plant starch, 18 parts of 1, 4-butanediol, 16 parts of butylene terephthalate alcohol, 0.3 part of lubricant, 4 parts of glycerol, 0.8 part of fatty acid ester, 0.1 part of calcium carbonate, 0.2 part of silicon dioxide and 0.3 part of titanium dioxide.
4. The formula of the degradable plastic bag according to claim 1, which is characterized by comprising the following components in parts by weight: 30 parts of polylactic acid, 5 parts of coupling agent, 25 parts of plant starch, 20 parts of 1, 4-butanediol, 18 parts of butylene terephthalate alcohol, 0.4 part of lubricant, 5 parts of glycerol, 1 part of fatty acid ester, 0.2 part of calcium carbonate, 0.3 part of silicon dioxide and 0.4 part of titanium dioxide.
5. The formulation of a degradable plastic bag according to claim 1, wherein said coupling agent is a silane coupling agent.
6. The production process of the degradable plastic bag is characterized by comprising the following steps:
(1) mixing the polylactic acid, the coupling agent, the plant starch, the 1, 4-butanediol, the butylene terephthalate alcohol, the lubricant, the glycerol, the fatty acid ester, the calcium carbonate, the silicon dioxide and the titanium dioxide in parts by weight to prepare a mixture;
(2) feeding the mixture into an underwater granulator, pressurizing the fused mixture to 5.0MPa by a double-screw extruder, filtering out impurities possibly existing by a screen changer, then shunting the filtered fused mixture into a plurality of runners of a template, enabling the material to flow to a discharge end at an accelerated speed due to the gradual reduction of the diameter of the runners, finally enabling the material to enter a granulating water chamber in a linear manner through a die hole, cooling the fused mixture by particles at 50-70 ℃ instantly, cutting the fused mixture into plastic particles by a high-speed rotary cutter tightly attached to the surface of the template, finishing the whole granulating process, and finally conveying the particles to a centrifugal dryer by cooling water for dehydration and drying;
(3) heating and melting the plastic particles obtained in the step (2), extruding the plastic particles by an extruder, and producing a degradable plastic film by vertically blowing the film;
(4) and making the degradable plastic film into various packaging bags according to the requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210516710.4A CN114836015A (en) | 2022-05-12 | 2022-05-12 | Formula and production process of degradable plastic bag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210516710.4A CN114836015A (en) | 2022-05-12 | 2022-05-12 | Formula and production process of degradable plastic bag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114836015A true CN114836015A (en) | 2022-08-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110511442A (en) * | 2019-09-27 | 2019-11-29 | 福州绿帆包装材料有限公司 | A kind of Degradable environment-friendlyplastic plastic film formulation and its production technology |
| CN112409765A (en) * | 2020-11-16 | 2021-02-26 | 深圳市正旺环保新材料有限公司 | Degradable environment-friendly plastic bag and preparation method thereof |
| CN113185819A (en) * | 2021-04-25 | 2021-07-30 | 昆山金盟塑料薄膜有限公司 | Green biodegradable plastic film and energy-saving processing technology thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110511442A (en) * | 2019-09-27 | 2019-11-29 | 福州绿帆包装材料有限公司 | A kind of Degradable environment-friendlyplastic plastic film formulation and its production technology |
| CN112409765A (en) * | 2020-11-16 | 2021-02-26 | 深圳市正旺环保新材料有限公司 | Degradable environment-friendly plastic bag and preparation method thereof |
| CN113185819A (en) * | 2021-04-25 | 2021-07-30 | 昆山金盟塑料薄膜有限公司 | Green biodegradable plastic film and energy-saving processing technology thereof |
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