CN112795139A - Preparation method of degradable biological plastic bag - Google Patents
Preparation method of degradable biological plastic bag Download PDFInfo
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- CN112795139A CN112795139A CN202011632399.7A CN202011632399A CN112795139A CN 112795139 A CN112795139 A CN 112795139A CN 202011632399 A CN202011632399 A CN 202011632399A CN 112795139 A CN112795139 A CN 112795139A
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- plastic
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- plastic bag
- polyurethane
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- 229920003023 plastic Polymers 0.000 title claims abstract description 62
- 239000004033 plastic Substances 0.000 title claims abstract description 62
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 32
- 238000003756 stirring Methods 0.000 claims abstract description 30
- 229920002635 polyurethane Polymers 0.000 claims abstract description 27
- 239000004814 polyurethane Substances 0.000 claims abstract description 27
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 23
- 238000001035 drying Methods 0.000 claims abstract description 19
- 238000001125 extrusion Methods 0.000 claims abstract description 18
- 239000002985 plastic film Substances 0.000 claims abstract description 17
- 229920006255 plastic film Polymers 0.000 claims abstract description 17
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 16
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 16
- 239000003822 epoxy resin Substances 0.000 claims abstract description 16
- 239000004088 foaming agent Substances 0.000 claims abstract description 16
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 16
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 238000007664 blowing Methods 0.000 claims abstract description 6
- 238000010096 film blowing Methods 0.000 claims abstract description 6
- 238000005469 granulation Methods 0.000 claims abstract description 6
- 230000003179 granulation Effects 0.000 claims abstract description 6
- 238000004080 punching Methods 0.000 claims abstract description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 6
- 229920001864 tannin Polymers 0.000 claims description 11
- 239000001648 tannin Substances 0.000 claims description 11
- 235000018553 tannin Nutrition 0.000 claims description 11
- 240000006409 Acacia auriculiformis Species 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 5
- 229920000704 biodegradable plastic Polymers 0.000 claims 2
- 244000005700 microbiome Species 0.000 description 4
- 239000013502 plastic waste Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- 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
-
- C—CHEMISTRY; METALLURGY
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- C—CHEMISTRY; METALLURGY
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
-
- C—CHEMISTRY; METALLURGY
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
-
- C—CHEMISTRY; METALLURGY
- 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
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- 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
- C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2471/02—Polyalkylene oxides
-
- C—CHEMISTRY; METALLURGY
- 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
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
-
- 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
Abstract
The invention provides a preparation method of a degradable biological plastic bag, which comprises the following steps: s1, placing polyurethane, epoxy resin, polyethylene glycol, calcium carbonate and foaming agent into a stirring kettle for stirring and fusing, wherein the temperature is kept at 140 ℃ in the stirring process, the stirring speed is 60-70r/min, and the stirring time is 20-30min, so as to obtain a mixture A; s2, pouring the mixture A obtained in the step S1 into a double-screw extruder for extrusion granulation, wherein the extrusion temperature is 110-175 ℃, and the extrusion time is 3-8S, so as to obtain plastic master batches; s3, putting the plastic master batch obtained in the step S2 into a dryer for drying treatment, wherein the drying time is 1-3 h; s4, adding the plastic master batch obtained in the step S3 into a film blowing machine, and blowing the plastic master batch into a plastic film; s5, rolling, bag making and punching the plastic film obtained in the step S4 to obtain the degradable biological plastic bag.
Description
Technical Field
The invention relates to the technical field of plastic bag processing, in particular to a preparation method of a degradable biological plastic bag.
Background
According to data statistics, the annual output of Chinese plastic products in 1-10 months in 2020 is about 6075.7 ten thousand tons, the annual output of plastics in the world is about 2.6 hundred million tons, if the annual output of plastics is calculated according to 50% of the plastic waste amount per year, the annual plastic waste amount in the world is 1.3 hundred million tons, the annual plastic waste amount in China is more than 3037 ten thousand tons, and the proportion of the waste plastic in garbage accounts for 40%, so that a large amount of waste plastic is buried underground as garbage, which undoubtedly brings greater pressure to originally deficient culturable land, and most of the generated plastic comes from plastic bags which bring great convenience to people during shopping, but the plastic bags have extremely low recovery value, are not easy to be degraded by natural microorganisms, are not separated in the natural environment for a long time, cause great harm to the environment, but have excessively high cost and low strength, and the degradation effect is not ideal.
Disclosure of Invention
The invention aims to provide a preparation method of a degradable biological plastic bag, which ensures the strength of the plastic bag, reduces the production cost and has good degradation effect.
In order to solve the technical problems, the invention adopts the following technical scheme:
a preparation method of a degradable biological plastic bag comprises the following steps:
s1, placing polyurethane, epoxy resin, polyethylene glycol, calcium carbonate and foaming agent into a stirring kettle for stirring and fusing, wherein the temperature is kept at 140 ℃ in the stirring process, the stirring speed is 60-70r/min, and the stirring time is 20-30min, so as to obtain a mixture A;
s2, pouring the mixture A obtained in the step S1 into a double-screw extruder for extrusion granulation, wherein the extrusion temperature is 110-175 ℃, and the extrusion time is 3-8S, so as to obtain plastic master batches;
s3, putting the plastic master batch obtained in the step S2 into a dryer for drying treatment, wherein the drying time is 1-3 h;
s4, adding the plastic master batch obtained in the step S3 into a film blowing machine, and blowing the plastic master batch into a plastic film;
s5, rolling, bag making and punching the plastic film obtained in the step S4 to obtain the degradable biological plastic bag.
Preferably, the polyurethane is synthesized by using bark of black wattle containing tannin as a raw material.
Preferably, the weight parts of the polyurethane, the epoxy resin, the polyethylene glycol, the calcium carbonate and the foaming agent in the step S1 are as follows: 3-8 parts of polyurethane, 20-50 parts of epoxy resin, 8-10 parts of polyethylene glycol, 2-8 parts of calcium carbonate and 1-3 parts of foaming agent.
Preferably, the particle size of the plastic masterbatch in step S2 is 2-4 mm.
Preferably, the drying temperature of the dryer in step S3 is set to 15 to 18 degrees.
Preferably, the thickness of the plastic film in step S4 is 2-4 mm.
Compared with the prior art, the invention has the advantages that:
according to the invention, the polyurethane is synthesized by directly taking the black wattle bark containing the tannin as the raw material, so that natural resources are effectively utilized, energy consumption for extracting and drying the tannin is saved, the cost for producing the degradable biological plastic bag is greatly reduced, the tannin has good biodegradability in the nature, and infrared spectrum analysis shows that the black wattle bark component is superior to other components and is decomposed by microorganisms in the bark polyurethane, so that the black wattle bark component is used as a crosslinking point in the polyurethane to improve the strength of the polyurethane, the plastic bag has good strength, and the black wattle bark component is used as a decomposition object of the microorganisms in the presence of the microorganisms to degrade the polyurethane, and the plastic bag has good degradability.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Example 1 of the invention: a preparation method of a degradable biological plastic bag comprises the following steps:
s1, placing polyurethane, epoxy resin, polyethylene glycol, calcium carbonate and a foaming agent into a stirring kettle for stirring and fusing, wherein the temperature is kept at 120 ℃ in the stirring process, the stirring speed is 60r/min, and the stirring time is 20min, so as to obtain a mixture A;
s2, pouring the mixture A obtained in the step S1 into a double-screw extruder for extrusion granulation, wherein the extrusion temperature is 120 ℃ and the extrusion time is 4S, and obtaining plastic master batches;
s3, putting the plastic master batch obtained in the step S2 into a dryer for drying treatment, wherein the drying time is 1 h;
s4, adding the plastic master batch obtained in the step S3 into a film blowing machine, and blowing the plastic master batch into a plastic film;
s5, rolling, bag making and punching the plastic film obtained in the step S4 to obtain the degradable biological plastic bag.
The polyurethane is synthesized by taking tannin-containing black wattle bark as a raw material.
In the step S1, the polyurethane, the epoxy resin, the polyethylene glycol, the calcium carbonate and the foaming agent are as follows in parts by weight: 3 parts of polyurethane, 20 parts of epoxy resin, 8 parts of polyethylene glycol, 2 parts of calcium carbonate and 1 part of foaming agent.
In step S2, the particle size of the plastic master batch is 2 mm.
The drying temperature of the dryer is set to 15 degrees in step S3.
The thickness of the plastic film in step S4 was 2 mm.
Example 2 of the invention: a preparation method of a degradable biological plastic bag comprises the following steps:
s1, placing polyurethane, epoxy resin, polyethylene glycol, calcium carbonate and a foaming agent into a stirring kettle for stirring and fusing, wherein the temperature is kept at 130 ℃ in the stirring process, the stirring speed is 65r/min, and the stirring time is 25min, so that a mixture A is obtained;
s2, pouring the mixture A obtained in the step S1 into a double-screw extruder for extrusion granulation, wherein the extrusion temperature is 140 ℃ and the extrusion time is 5S, and obtaining plastic master batches;
s3, putting the plastic master batch obtained in the step S2 into a dryer for drying treatment, wherein the drying time is 1.5 h;
s4, adding the plastic master batch obtained in the step S3 into a film blowing machine, and blowing the plastic master batch into a plastic film;
s5, rolling, bag making and punching the plastic film obtained in the step S4 to obtain the degradable biological plastic bag.
The polyurethane is synthesized by taking tannin-containing black wattle bark as a raw material.
In the step S1, the polyurethane, the epoxy resin, the polyethylene glycol, the calcium carbonate and the foaming agent are as follows in parts by weight: 5 parts of polyurethane, 30 parts of epoxy resin, 9 parts of polyethylene glycol, 6 parts of calcium carbonate and 2 parts of foaming agent.
In step S2, the particle size of the plastic master batch is 3 mm.
The drying temperature of the dryer is set to 16 degrees in step S3.
The thickness of the plastic film in step S4 was 3 mm.
Example 3 of the invention: a preparation method of a degradable biological plastic bag comprises the following steps:
s1, placing polyurethane, epoxy resin, polyethylene glycol, calcium carbonate and a foaming agent into a stirring kettle for stirring and fusing, wherein the temperature is kept at 140 ℃ in the stirring process, the stirring speed is 70r/min, and the stirring time is 30min, so that a mixture A is obtained;
s2, pouring the mixture A obtained in the step S1 into a double-screw extruder for extrusion granulation, wherein the extrusion temperature is 150 ℃ and the extrusion time is 6 seconds, and obtaining plastic master batches;
s3, putting the plastic master batch obtained in the step S2 into a dryer for drying treatment, wherein the drying time is 2 hours;
s4, adding the plastic master batch obtained in the step S3 into a film blowing machine, and blowing the plastic master batch into a plastic film;
s5, rolling, bag making and punching the plastic film obtained in the step S4 to obtain the degradable biological plastic bag.
The polyurethane is synthesized by taking tannin-containing black wattle bark as a raw material.
In the step S1, the polyurethane, the epoxy resin, the polyethylene glycol, the calcium carbonate and the foaming agent are as follows in parts by weight: 7 parts of polyurethane, 45 parts of epoxy resin, 10 parts of polyethylene glycol, 8 parts of calcium carbonate and 3 parts of foaming agent.
In step S2, the particle size of the plastic master batch is 4 mm.
The drying temperature of the dryer in step S3 was set to 17 degrees.
The thickness of the plastic film in step S4 was 4 mm.
The working principle of the invention is as follows:
the polyurethane in the invention is synthesized by directly taking the black wattle bark containing the tannin as the raw material, which not only effectively utilizes natural resources, but also saves the energy consumption required for extracting and drying the tannin, greatly reduces the cost for producing the degradable biological plastic bag, and the tannin has good biodegradability in the nature.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. A preparation method of a degradable biological plastic bag is characterized by comprising the following steps: the method comprises the following steps:
s1, placing polyurethane, epoxy resin, polyethylene glycol, calcium carbonate and foaming agent into a stirring kettle for stirring and fusing, wherein the temperature is kept at 140 ℃ in the stirring process, the stirring speed is 60-70r/min, and the stirring time is 20-30min, so as to obtain a mixture A;
s2, pouring the mixture A obtained in the step S1 into a double-screw extruder for extrusion granulation, wherein the extrusion temperature is 110-175 ℃, and the extrusion time is 3-8S, so as to obtain plastic master batches;
s3, putting the plastic master batch obtained in the step S2 into a dryer for drying treatment, wherein the drying time is 1-3 h;
s4, adding the plastic master batch obtained in the step S3 into a film blowing machine, and blowing the plastic master batch into a plastic film;
s5, rolling, bag making and punching the plastic film obtained in the step S4 to obtain the degradable biological plastic bag.
2. The method for preparing degradable biological plastic bag according to claim 1, wherein the polyurethane is synthesized by using bark of black wattle containing tannin as raw material.
3. The method for preparing the degradable biological plastic bag according to claim 1, wherein the polyurethane, the epoxy resin, the polyethylene glycol, the calcium carbonate and the foaming agent in the step S1 are prepared in parts by weight as follows: 3-8 parts of polyurethane, 20-50 parts of epoxy resin, 8-10 parts of polyethylene glycol, 2-8 parts of calcium carbonate and 1-3 parts of foaming agent.
4. The method for preparing the degradable biological plastic bag according to claim 1, wherein the particle size of the plastic masterbatch in step S2 is 2-4 mm.
5. The method of preparing a degradable bio plastic bag according to claim 1, wherein the drying temperature of the dryer is set to 15-18 degrees in step S3.
6. The method for preparing a degradable bio plastic bag according to claim 1, wherein the thickness of the plastic film in the step S4 is 2-4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011632399.7A CN112795139A (en) | 2020-12-31 | 2020-12-31 | Preparation method of degradable biological plastic bag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011632399.7A CN112795139A (en) | 2020-12-31 | 2020-12-31 | Preparation method of degradable biological plastic bag |
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| CN112795139A true CN112795139A (en) | 2021-05-14 |
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| CN202011632399.7A Pending CN112795139A (en) | 2020-12-31 | 2020-12-31 | Preparation method of degradable biological plastic bag |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1191875A (en) * | 1998-03-10 | 1998-09-02 | 复旦大学 | High elastic polyurethane material prepared using bark as raw material and its preparation |
| US20020156333A1 (en) * | 2001-02-02 | 2002-10-24 | Oren Rosen | Instant degradation of plastics into soluble non-toxic products |
| CN103694140A (en) * | 2013-12-02 | 2014-04-02 | 艾达索高新材料无锡有限公司 | Degradable isocyanate and application thereof |
| CN105199335A (en) * | 2015-09-17 | 2015-12-30 | 苏州新区佳合塑胶有限公司 | Preparation method of degradable plastic thin film |
| CN106893273A (en) * | 2017-03-22 | 2017-06-27 | 中国科学院理化技术研究所 | A kind of calcium carbonate as shopping bag filling biodegradable plastic film material high and preparation method thereof |
| CN111171355A (en) * | 2019-12-29 | 2020-05-19 | 桐城市千家惠塑料包装有限公司 | Preparation method of waterproof degradable environment-friendly bag |
-
2020
- 2020-12-31 CN CN202011632399.7A patent/CN112795139A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1191875A (en) * | 1998-03-10 | 1998-09-02 | 复旦大学 | High elastic polyurethane material prepared using bark as raw material and its preparation |
| US20020156333A1 (en) * | 2001-02-02 | 2002-10-24 | Oren Rosen | Instant degradation of plastics into soluble non-toxic products |
| CN103694140A (en) * | 2013-12-02 | 2014-04-02 | 艾达索高新材料无锡有限公司 | Degradable isocyanate and application thereof |
| CN105199335A (en) * | 2015-09-17 | 2015-12-30 | 苏州新区佳合塑胶有限公司 | Preparation method of degradable plastic thin film |
| CN106893273A (en) * | 2017-03-22 | 2017-06-27 | 中国科学院理化技术研究所 | A kind of calcium carbonate as shopping bag filling biodegradable plastic film material high and preparation method thereof |
| CN111171355A (en) * | 2019-12-29 | 2020-05-19 | 桐城市千家惠塑料包装有限公司 | Preparation method of waterproof degradable environment-friendly bag |
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