CN112812401A - Preparation method of high-strength plastic bag - Google Patents
Preparation method of high-strength plastic bag Download PDFInfo
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- CN112812401A CN112812401A CN202011625855.5A CN202011625855A CN112812401A CN 112812401 A CN112812401 A CN 112812401A CN 202011625855 A CN202011625855 A CN 202011625855A CN 112812401 A CN112812401 A CN 112812401A
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- plastic
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- master batch
- plastic bag
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- 239000004033 plastic Substances 0.000 title claims abstract description 61
- 229920003023 plastic Polymers 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 30
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 23
- 238000001125 extrusion Methods 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 17
- 239000002985 plastic film Substances 0.000 claims abstract description 17
- 229920006255 plastic film Polymers 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 14
- 229920001577 copolymer Polymers 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 12
- -1 polyethylene Polymers 0.000 claims abstract description 7
- 239000004698 Polyethylene Substances 0.000 claims abstract description 6
- 239000000654 additive Substances 0.000 claims abstract description 6
- 230000000996 additive effect Effects 0.000 claims abstract description 6
- 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
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 6
- 229920000573 polyethylene Polymers 0.000 claims abstract description 6
- 239000004626 polylactic acid Substances 0.000 claims abstract description 6
- 239000002904 solvent Substances 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—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
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
-
- 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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—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
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
-
- 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
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Wrappers (AREA)
- Bag Frames (AREA)
Abstract
The invention provides a preparation method of a high-strength plastic bag. It comprises the following steps: s1, putting 40-60 parts of ethylene-1-butene binary copolymer, 50-80 parts of polyethylene, 0.8-2 parts of additive, 20-30 parts of polylactic acid and 5-8 parts of solvent into a stirring kettle according to the proportion for stirring and fusing, wherein the temperature is kept at 180 ℃ in the stirring process, the pH value is kept at 6.5-7, the stirring speed is 60-70r/min, and the stirring time is 15-30min, 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 120-180 ℃ 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 temperature 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, the plastic film obtained in the step S4 is rolled, made into a bag and punched to obtain a high-strength plastic bag.
Description
Technical Field
The invention relates to the technical field of plastic bag processing, in particular to a preparation method of a high-strength plastic bag.
Background
Plastic bags (Plastic bags) are bags made of plastics (commonly used plastics include polypropylene, polyester, nylon, and the like) as main raw materials, are essential articles in daily life of people, and are often used for containing other articles. The plastic bag has the advantages of low price, extremely light weight, large capacity and convenient storage, but is forbidden to be produced and used by some countries due to the defects of extremely long degradation period and difficult treatment of the plastic bag, but most of the existing plastic bags in the market do not have high puncture resistance and tensile resistance, have low strength, are very easy to damage after being used once, and greatly increase the generation of white garbage in daily life.
Disclosure of Invention
The invention aims to provide a preparation method of a high-strength plastic bag, so that the plastic bag has high puncture resistance, tensile resistance and strength, can be repeatedly used for many times, and greatly reduces the generation of white garbage in daily life.
In order to solve the technical problem, the invention adopts the following technical scheme:
a preparation method of a high-strength plastic bag comprises the following steps:
s1, putting 40-60 parts of ethylene-1-butene binary copolymer, 50-80 parts of polyethylene, 0.8-2 parts of additive, 20-30 parts of polylactic acid and 5-8 parts of solvent into a stirring kettle according to the proportion for stirring and fusing, wherein the temperature is kept at 180 ℃ in the stirring process, the pH value is kept at 6.5-7, the stirring speed is 60-70r/min, and the stirring time is 15-30min, 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 120-180 ℃ 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 temperature 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, the plastic film obtained in the step S4 is rolled, made into a bag and punched to obtain a high-strength plastic bag.
Preferably, the ethylene-1-butene bipolymer in step S1 is prepared using Unipol gas phase process.
Preferably, the particle size of the plastic masterbatch in step S2 is 3-5 mm.
Preferably, the drying temperature of the dryer in step S3 is 10 to 15 degrees.
Preferably, the thickness of the plastic film in step S4 is 2-3 mm.
Compared with the prior art, the invention has the advantages that:
in the invention, the ethylene-1-butene binary copolymer prepared by the Unipol gas phase process technology has the density of 0.945 to 0.951g/cm3The tensile yield stress is greater than or equal to 19Mpa, the tensile breaking stress is greater than or equal to 23Mpa, and the breaking nominal strain is greater than or equal to 500%, so that the puncture resistance, the tensile resistance and the strength of the plastic bag are greatly improved, the plastic bag can be repeatedly used for many times, and the generation of white garbage in daily life is greatly reduced.
Detailed Description
The technical solutions in the embodiments of the present invention will be 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 high-strength plastic bag comprises the following steps:
s1, putting 40 parts of ethylene-1-butene binary copolymer, 50-80 parts of polyethylene, 1 part of additive, 20 parts of polylactic acid and 6 parts of solvent into a stirring kettle according to the proportion, stirring and fusing, wherein the temperature is kept at 120 ℃ in the stirring process, the pH value is kept at 6.6, the stirring speed is 60r/min, and the stirring time is 20min, so that a mixture A can be obtained;
s2, pouring the mixture A obtained in the step S1 into a double-screw extruder for extrusion granulation, wherein the extrusion temperature is 130 ℃ 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 temperature 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, the plastic film obtained in the step S4 is rolled, made into a bag and punched to obtain a high-strength plastic bag.
In step S1, the ethylene-1-butene copolymer is prepared by Unipol gas phase process.
In step S2, the particle size of the plastic master batch is 3 mm.
The drying temperature of the dryer in step S3 was 12 degrees.
The thickness of the plastic film in step S4 was 2 mm.
Example 2: a preparation method of a high-strength plastic bag comprises the following steps:
s1, putting 50 parts of ethylene-1-butene binary copolymer, 50-80 parts of polyethylene, 1.5 parts of additive, 25 parts of polylactic acid and 7 parts of solvent into a stirring kettle according to the proportion, stirring and fusing, wherein the temperature is kept at 140 ℃ in the stirring process, the pH value is kept at 6.7, the stirring speed is 65r/min, and the stirring time is 25min, so that a mixture A can be obtained;
s2, pouring the mixture A obtained in the step S1 into a double-screw extruder for extrusion granulation, wherein the extrusion temperature is 125 ℃ 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 temperature is 1.2 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, the plastic film obtained in the step S4 is rolled, made into a bag and punched to obtain a high-strength plastic bag.
In step S1, the ethylene-1-butene copolymer is prepared by Unipol gas phase process.
In step S2, the particle size of the plastic master batch is 3.5 mm.
The drying temperature of the dryer in step S3 was 12 degrees.
The thickness of the plastic film in step S4 was 2.5 mm.
Example 3: a preparation method of a high-strength plastic bag comprises the following steps:
s1, putting 55 parts of ethylene-1-butene binary copolymer, 50-80 parts of polyethylene, 2 parts of additive, 30 parts of polylactic acid and 8 parts of solvent into a stirring kettle according to the proportion, stirring and fusing, wherein the temperature is kept at 150 ℃ in the stirring process, the pH value is kept at 6.7, the stirring speed is 70r/min, and the stirring time is 30min, so that a mixture A can be 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 temperature 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, the plastic film obtained in the step S4 is rolled, made into a bag and punched to obtain a high-strength plastic bag.
In step S1, the ethylene-1-butene copolymer is prepared by Unipol gas phase process.
In step S2, the particle size of the plastic master batch is 4 mm.
The drying temperature of the dryer in step S3 was 12 degrees.
The thickness of the plastic film in step S4 was 3 mm.
The working principle of the invention is as follows:
the ethylene-1-butene binary copolymer is prepared by adopting Unipol gas phase process, the raw materials of the ethylene-1-butene binary copolymer are ethylene and hexene, wherein the purity of the ethylene is 99.99 percent, and the density of the prepared ethylene-1-butene binary copolymer is 0.945 to 0.951g/cm3The tensile yield stress is greater than or equal to 19Mpa, the tensile breaking stress is greater than or equal to 23Mpa, and the breaking nominal strain is greater than or equal to 500%, so that the puncture resistance, the tensile resistance and the strength of the plastic bag are greatly improved, the plastic bag can be repeatedly used for many times, and the generation of white garbage in daily life is greatly reduced.
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 (5)
1. The preparation method of the high-strength plastic bag is characterized by comprising the following steps:
s1, putting 40-60 parts of ethylene-1-butene binary copolymer, 50-80 parts of polyethylene, 0.8-2 parts of additive, 20-30 parts of polylactic acid and 5-8 parts of solvent into a stirring kettle according to the proportion for stirring and fusing, wherein the temperature is kept at 180 ℃ in the stirring process, the pH value is kept at 6.5-7, the stirring speed is 60-70r/min, and the stirring time is 15-30min, 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 120-180 ℃ 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 temperature 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, the plastic film obtained in the step S4 is rolled, made into a bag and punched to obtain a high-strength plastic bag.
2. The method as claimed in claim 1, wherein the ethylene-1-butene bipolymer is prepared by Unipol gas phase process in step S1.
3. The method of manufacturing a high-strength plastic bag according to claim 1, wherein the particle size of the plastic masterbatch in step S2 is 3-5 mm.
4. The method of manufacturing a high-strength plastic bag according to claim 1, wherein the drying temperature of the dryer in step S3 is 10 to 15 degrees.
5. The method of manufacturing a high-strength plastic bag according to claim 1, wherein the thickness of the plastic film in step S4 is 2-3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011625855.5A CN112812401A (en) | 2020-12-31 | 2020-12-31 | Preparation method of high-strength plastic bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011625855.5A CN112812401A (en) | 2020-12-31 | 2020-12-31 | Preparation method of high-strength plastic bag |
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| Publication Number | Publication Date |
|---|---|
| CN112812401A true CN112812401A (en) | 2021-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011625855.5A Pending CN112812401A (en) | 2020-12-31 | 2020-12-31 | Preparation method of high-strength plastic bag |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106046490A (en) * | 2016-06-29 | 2016-10-26 | 惠州市恒兴达再生资源有限公司 | Easily-degradable environment-friendly plastic bag and preparation method thereof |
| CN106317584A (en) * | 2015-06-29 | 2017-01-11 | 中国石油化工股份有限公司 | Polyethylene resin and preparation method thereof |
-
2020
- 2020-12-31 CN CN202011625855.5A patent/CN112812401A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106317584A (en) * | 2015-06-29 | 2017-01-11 | 中国石油化工股份有限公司 | Polyethylene resin and preparation method 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 |
| CN106046490A (en) * | 2016-06-29 | 2016-10-26 | 惠州市恒兴达再生资源有限公司 | Easily-degradable environment-friendly plastic bag and preparation method thereof |
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Application publication date: 20210518 |