CN115109334A - Degradable PE preservative film and production process thereof - Google Patents
Degradable PE preservative film and production process thereof Download PDFInfo
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- CN115109334A CN115109334A CN202110305395.6A CN202110305395A CN115109334A CN 115109334 A CN115109334 A CN 115109334A CN 202110305395 A CN202110305395 A CN 202110305395A CN 115109334 A CN115109334 A CN 115109334A
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- 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
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- 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
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- 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
- 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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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- 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
- C08K5/00—Use of organic ingredients
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/20—Carboxylic acid amides
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5435—Silicon-containing compounds containing oxygen containing oxygen in a ring
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- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of packaging materials, in particular to a degradable PE preservative film and a production process thereof. The paint is characterized by comprising the following components in parts by weight: 50-70 parts of polyethylene; 30-50 parts of modified starch; 4-6 parts of dicumyl peroxide; 5-8 parts of a silane coupling agent; 3-7 parts of octadecanamide; 25-35 parts of ethylene glycol. The PE preservative film disclosed by the invention is degradable and is suitable for the field of packaging.
Description
Technical Field
The invention relates to the technical field of packaging materials, in particular to a degradable PE preservative film and a production process thereof.
Background
The preservative film is a plastic packaging product, is usually prepared by taking ethylene as a master batch through polymerization reaction, is mainly used for occasions such as microwave oven food heating, refrigerator food preservation, fresh and cooked food packaging and the like, and is widely applied to the fields of food packaging of family life, supermarket stores, hotels and restaurants and industrial production. The preservative film is favored by people due to the characteristics of convenience, economy and beautiful appearance.
However, the PE preservative film produced and sold in the existing market belongs to a common PE food preservative film, and due to the traditional ingredients and production process, a finished product does not have the environmental protection characteristic when being used, and can hardly be automatically decomposed in the nature after being discarded, so that the PE preservative film becomes an important source of white pollution.
Disclosure of Invention
The purpose of the invention is: aiming at the problem that the PE preservative film cannot be automatically decomposed at present, the invention provides a degradable PE preservative film and a production process thereof.
The technical scheme for realizing the purpose of the invention is as follows: a degradable PE preservative film is characterized by comprising the following components in parts by weight:
50-70 parts of polyethylene;
30-50 parts of modified starch;
4-6 parts of dicumyl peroxide;
5-8 parts of a silane coupling agent;
3-7 parts of octadecanamide;
25-35 parts of ethylene glycol.
The modified starch is calculated by weight;
65-80 parts of starch;
10-20 parts of glycerol;
5-10 parts of water.
The silane coupling agent is 3-glycidyl ether oxypropyl triethoxysilane.
Preferred components are:
60 parts of polyethylene;
40 parts of modified starch;
5 parts of dicumyl peroxide;
6 parts of 3-glycidyl ether oxypropyltriethoxysilane;
5 parts of octadecanamide;
30 parts of ethylene glycol.
A production process of a degradable PE preservative film comprises the following steps:
putting various raw materials into a mixing barrel according to a proportion, and fully mixing the raw materials by a stirring device in the mixing barrel;
feeding the mixed raw materials into a film extruder, filtering the raw materials by a three-layer filtering device of the film extruder, feeding the raw materials into an extrusion die by a spiral pressurizing feeding device in the film extruder, melting the initial materials at a high temperature by the extrusion die, setting the extrusion temperature, blowing the initial materials by compressed air while the initial materials are hot, and blowing the initial materials into a cylindrical film semi-finished product;
step three, after extruding and exhausting the cooled cylindrical film semi-finished product, reeling the cylindrical film semi-finished product onto a film roller through a traction winding machine, and simultaneously cutting off two side strips of the cylindrical film semi-finished product through an edge cutting machine; and obtaining a PE preservative film finished product on the film roller.
The extrusion temperature in the second step is 140-160 ℃.
The cutting width in the third step is less than 12 mm.
The polyethylene plastic prepared by the invention has the following beneficial effects as a packaging material:
(1) the polyethylene is modified by adopting the modified starch, so that the degradability of the polyethylene is improved, the obtained polyethylene film can be well degraded, and the environmental friendliness is good.
(2) The polyethylene plastic prepared by the method has extremely stable performance by using starch, dicumyl peroxide, a silane coupling agent and octadecanamide to act on the polyethylene.
Detailed Description
(example 1)
Adding 70 parts by weight of starch, 20 parts by weight of glycerol and 10 parts by weight of water into a high-speed mixer, fully mixing and wetting, and modifying for 20 minutes to obtain modified starch.
Weighing the following components in parts by weight: 60 parts of polyethylene; 40 parts of modified starch; 5 parts of dicumyl peroxide; 6 parts of 3-glycidyl ether oxypropyltriethoxysilane; 5 parts of octadecanamide; 30 parts of ethylene glycol.
Putting various raw materials into a mixing barrel according to a proportion, and fully mixing the raw materials by a stirring device in the mixing barrel; feeding the mixed raw materials into a film extruder, filtering the raw materials by a three-layer filtering device of the film extruder, feeding the raw materials into an extrusion die by a spiral pressurizing feeding device in the film extruder, melting the initial materials at high temperature by the extrusion die, blowing the initial materials by compressed air while the initial materials are hot at the extrusion temperature of 150 ℃, and blowing the initial materials into a barrel-shaped film semi-finished product; after the cooled cylindrical film semi-finished product is extruded and exhausted, the cylindrical film semi-finished product is wound on a film roller through a traction winding machine, and meanwhile, two side strips of the cylindrical film semi-finished product are cut off through an edge cutting machine; the cutting width is 10mm, and a PE preservative film finished product on the film roller is obtained.
(example 2)
Adding 80 parts by weight of starch, 15 parts by weight of glycerol and 5 parts by weight of water into a high-speed mixer, fully mixing and wetting, and modifying for 15 minutes to obtain modified starch.
Weighing the following components in parts by weight: 65 parts of polyethylene; 35 parts of modified starch; 4 parts of dicumyl peroxide; 6 parts of 3-glycidyl ether oxypropyltriethoxysilane; 6 parts of octadecanamide; 35 parts of ethylene glycol.
Putting various raw materials into a mixing barrel according to a proportion, and fully mixing the raw materials by a stirring device in the mixing barrel; feeding the mixed raw materials into a film extruder, filtering the raw materials by a three-layer filtering device of the film extruder, feeding the raw materials into an extrusion die by a spiral pressurizing feeding device in the film extruder, melting the initial materials at a high temperature of 160 ℃ by the extrusion die, blowing the initial materials by compressed air while the initial materials are hot, and blowing the initial materials into a barrel-shaped film semi-finished product; after the cooled cylindrical film semi-finished product is extruded and exhausted, the cylindrical film semi-finished product is wound on a film roller through a traction winding machine, and meanwhile, two side edge strips of the cylindrical film semi-finished product are cut off through an edge cutting machine; the cutting width is 10mm, and a PE preservative film finished product on the film roller is obtained.
(example 3)
Adding 75 parts by weight of starch, 25 parts by weight of glycerol and 10 parts by weight of water into a high-speed mixer, fully mixing and wetting, and modifying for 10 minutes to obtain modified starch.
Weighing the following components in parts by weight: 50 parts of polyethylene; 50 parts of modified starch; 6 parts of dicumyl peroxide; 8 parts of 3-glycidyl ether oxypropyltriethoxysilane; 7 parts of octadecanamide; 25 parts of ethylene glycol.
Putting various raw materials into a mixing barrel according to a proportion, and fully mixing the raw materials by a stirring device in the mixing barrel; feeding the mixed raw materials into a film extruder, filtering the raw materials by a three-layer filtering device of the film extruder, feeding the raw materials into an extrusion die by a spiral pressurizing feeding device in the film extruder, melting the initial materials at high temperature by the extrusion die, blowing the initial materials by compressed air while the initial materials are hot at the extrusion temperature of 140 ℃, and blowing the initial materials into a barrel-shaped film semi-finished product; after the cooled cylindrical film semi-finished product is extruded and exhausted, the cylindrical film semi-finished product is wound on a film roller through a traction winding machine, and meanwhile, two side edge strips of the cylindrical film semi-finished product are cut off through an edge cutting machine; cutting width is 8mm, and PE preservative film finished products on the film roller are obtained.
The PE preservative films prepared in the above examples 1-3 were subjected to a degradation rate test. The degradation rate test adopts a composting method.
The test results are shown in Table 1.
TABLE 1 degradation rate test results of PE wrap films prepared in examples 1-3
From the results of table 1, it can be seen that the PE wrap films prepared in examples 1-3 have excellent degradability.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A degradable PE preservative film is characterized by comprising the following components in parts by weight:
50-70 parts of polyethylene;
30-50 parts of modified starch;
4-6 parts of dicumyl peroxide;
5-8 parts of a silane coupling agent;
3-7 parts of octadecanamide;
25-35 parts of ethylene glycol.
2. The degradable PE cling film according to claim 1, wherein said modified starch is by weight;
65-80 parts of starch;
10-20 parts of glycerol;
5-10 parts of water.
3. The degradable PE preservative film according to claim 1, wherein the silane coupling agent is 3-glycidyl ether oxypropyl triethoxysilane.
4. The degradable PE cling film according to claim 3, comprising the following components by weight:
60 parts of polyethylene;
40 parts of modified starch;
5 parts of dicumyl peroxide;
6 parts of 3-glycidyl ether oxypropyltriethoxysilane;
5 parts of octadecanamide;
30 parts of ethylene glycol.
5. The production process of the degradable PE preservative film according to claim 1, which is characterized by comprising the following steps:
putting various raw materials into a mixing barrel according to a proportion, and fully mixing the raw materials by a stirring device in the mixing barrel;
feeding the mixed raw materials into a film extruder, filtering the raw materials by a three-layer filtering device of the film extruder, feeding the raw materials into an extrusion die by a spiral pressurizing feeding device in the film extruder, melting the initial materials at a high temperature by the extrusion die, setting the extrusion temperature, blowing the initial materials by compressed air while the initial materials are hot, and blowing the initial materials into a cylindrical film semi-finished product;
step three, after extruding and exhausting the cooled cylindrical film semi-finished product, reeling the cylindrical film semi-finished product onto a film roller through a traction winding machine, and simultaneously cutting off two side strips of the cylindrical film semi-finished product through an edge cutting machine; and obtaining a PE preservative film finished product on the film roller.
6. The production process of the degradable PE preservative film as claimed in claim 5, wherein the extrusion temperature in the second step is 140-160 ℃.
7. The process for producing degradable PE cling film according to claim 5, wherein the cutting width in step three is less than 12 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110305395.6A CN115109334A (en) | 2021-03-23 | 2021-03-23 | Degradable PE preservative film and production process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110305395.6A CN115109334A (en) | 2021-03-23 | 2021-03-23 | Degradable PE preservative film and production process thereof |
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| Publication Number | Publication Date |
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| CN115109334A true CN115109334A (en) | 2022-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110305395.6A Pending CN115109334A (en) | 2021-03-23 | 2021-03-23 | Degradable PE preservative film and production process thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105968500A (en) * | 2016-06-12 | 2016-09-28 | 湖北华源包装有限公司 | Degradable modified polyethylene plastic for packaging and preparation method thereof |
| CN106009200A (en) * | 2016-07-31 | 2016-10-12 | 武汉市知富企业管理咨询有限公司 | Packaging plastic and preparation method thereof |
| CN107936440A (en) * | 2017-10-19 | 2018-04-20 | 合肥朗胜新材料有限公司 | A kind of environment-friendlyvinyl vinyl plastic and preparation method thereof |
-
2021
- 2021-03-23 CN CN202110305395.6A patent/CN115109334A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105968500A (en) * | 2016-06-12 | 2016-09-28 | 湖北华源包装有限公司 | Degradable modified polyethylene plastic for packaging and preparation method thereof |
| CN106009200A (en) * | 2016-07-31 | 2016-10-12 | 武汉市知富企业管理咨询有限公司 | Packaging plastic and preparation method thereof |
| CN107936440A (en) * | 2017-10-19 | 2018-04-20 | 合肥朗胜新材料有限公司 | A kind of environment-friendlyvinyl vinyl plastic and preparation method thereof |
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