CN111117045A - High-performance environment-friendly packaging film and preparation method thereof - Google Patents
High-performance environment-friendly packaging film and preparation method thereof Download PDFInfo
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- CN111117045A CN111117045A CN201911312870.1A CN201911312870A CN111117045A CN 111117045 A CN111117045 A CN 111117045A CN 201911312870 A CN201911312870 A CN 201911312870A CN 111117045 A CN111117045 A CN 111117045A
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- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/46—Applications of disintegrable, dissolvable or edible materials
- B65D65/466—Bio- or photodegradable packaging materials
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- 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
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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- C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
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- C08K13/02—Organic and inorganic ingredients
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
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- 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
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- C08K2201/011—Nanostructured additives
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- C08K5/00—Use of organic ingredients
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- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
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- C08K7/02—Fibres or whiskers
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- C08K7/14—Glass
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- 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
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Abstract
The invention discloses a high-performance environment-friendly packaging film which comprises, by weight, 100-120 parts of linear low-density polyethylene, 35-45 parts of polylactic acid, 30-40 parts of an ethylene-vinyl acetate copolymer, 20-35 parts of an ethylene-vinyl alcohol copolymer, 18-25 parts of polyvinyl alcohol, 14-22 parts of chitosan, 0.4-0.65 part of pentaerythrityl tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], 0.7-1.4 parts of ferric stearate, 14-18 parts of a reinforcing agent, 15-18 parts of a plasticizer, 20-30 parts of rubber powder, 3-8 parts of a lubricant and 1.5-5 parts of a degradation promoter.
Description
Technical Field
The invention relates to a packaging film, in particular to a high-performance environment-friendly packaging film and a preparation method thereof.
Background
In recent years, with the increase of environmental awareness, the problem of "white pollution" has become a focus of social attention. The use of biodegradable materials as packaging films is undoubtedly an effective way to solve this problem. Currently, biodegradable materials include polysaccharides such as cellulose, modified starch, sodium alginate, chitosan, etc., and proteins such as soy protein, corn protein, wheat alcohol soluble protein, gelatin, etc. The degradable materials are mainly used for fruit preservation, meat preservation and food packaging, and can be directly eaten.
The existing environment-friendly packaging film is low in degradation speed, and because biodegradable components comprise polysaccharides such as cellulose and the like, the tensile strength, the elongation at break, the barrier property and the like of the packaging film are poor.
Disclosure of Invention
In view of this, the invention provides a high-performance environment-friendly packaging film and a preparation method thereof. According to the invention, through optimizing raw materials and reasonably proportioning, the prepared high-performance environment-friendly packaging film has excellent mechanical properties such as tensile strength, elongation at break and barrier property, and can be degraded quickly after being abandoned in the nature and subjected to photo-biological degradation.
In order to solve the technical problems, the technical scheme provided by the invention is that the high-performance environment-friendly packaging film comprises the following raw materials, by weight, 100-120 parts of linear low-density polyethylene, 35-45 parts of polylactic acid, 30-40 parts of ethylene-vinyl acetate copolymer, 20-35 parts of ethylene-vinyl alcohol copolymer, 18-25 parts of polyvinyl alcohol, 14-22 parts of chitosan, 0.4-0.65 part of pentaerythrityl tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], 0.7-1.4 part of ferric stearate, 14-18 parts of reinforcing agent, 15-18 parts of plasticizer, 20-30 parts of rubber powder, 3-8 parts of lubricant and 1.5-5 parts of degradation promoter.
Preferably, the raw materials comprise, by weight, 105-115 parts of linear low-density polyethylene, 38-42 parts of polylactic acid, 32-36 parts of ethylene-vinyl acetate copolymer, 24-32 parts of ethylene-vinyl alcohol copolymer, 19-22 parts of polyvinyl alcohol, 16-18 parts of chitosan, 0.45-0.6 part of tetra [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 0.85-1.25 parts of ferric stearate, 15-17 parts of reinforcing agent, 16-17 parts of plasticizer, 22-28 parts of rubber powder, 5-7 parts of lubricant and 2-4 parts of degradation promoter.
Preferably, the raw materials comprise, by weight, 110 parts of linear low density polyethylene, 40 parts of polylactic acid, 35 parts of ethylene-vinyl acetate copolymer, 28 parts of ethylene-vinyl alcohol copolymer, 20 parts of polyvinyl alcohol, 17 parts of chitosan, 0.5 part of tetra [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 0.9 part of ferric stearate, 16 parts of reinforcing agent, 16.5 parts of plasticizer, 25 parts of rubber powder, 6 parts of lubricant and 3 parts of degradation promoter.
More preferably, the reinforcing agent is one or more of nano calcium carbonate, nano silica and glass fiber.
More preferably, the plasticizer is one or more of polyethylene glycol-400, epoxidized soybean oil and citrate.
The invention also provides a preparation method of the high-performance environment-friendly packaging film, which comprises the following steps:
(1) weighing the raw materials according to the raw material composition of the high-performance environment-friendly packaging film;
(2) mixing the raw materials weighed in the step (1) firstly, then mixing for 10min in a high-speed stirrer, sending the mixture into a double-screw extruder for extrusion, preserving the heat at 155-165 ℃ for 30-40 min after extrusion, cooling, stretching in two directions, and rolling to obtain the high-performance environment-friendly packaging film.
Compared with the prior art, the invention is explained in detail as follows:
1. according to the invention, through optimizing raw materials and reasonably proportioning, the prepared high-performance environment-friendly packaging film has excellent mechanical properties such as tensile strength, elongation at break and barrier property, and can be degraded quickly after being abandoned in the nature and subjected to photo-biological degradation.
2. The invention selects ethylene-vinyl acetate copolymer, polylactic acid, ethylene-vinyl alcohol copolymer, polyvinyl alcohol and linear low density polyethylene as the composite matrix material, not only the compatibility of each component of the composite matrix is good, but also the compatibility with other auxiliary agents is good, therefore, the invention has excellent mechanical properties, such as tensile strength, elongation at break and barrier property.
3. The polylactic acid and the polyvinyl alcohol are added in the invention and can be degraded in nature, and the degradation of the polylactic acid and the polyvinyl alcohol can cause the collapse of the whole packaging film structure and accelerate the degradation.
4. The high-performance environment-friendly packaging film is accelerated to be subjected to photodegradation after being discarded in the nature by adding the pentaerythrityl tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and the ferric stearate, and a large number of experiments show that the proportion not only ensures the service performance requirement of the high-performance environment-friendly packaging film, but also accelerates to be subjected to photodegradation after being discarded in the nature.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Example 1A high-performance environment-friendly packaging film comprises, by weight, 100 parts of linear low-density polyethylene, 35 parts of polylactic acid, 30 parts of an ethylene-vinyl acetate copolymer, 20 parts of an ethylene-vinyl alcohol copolymer, 18 parts of polyvinyl alcohol, 14 parts of chitosan, 0.4 part of tetra [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 0.7 part of ferric stearate, 14 parts of a reinforcing agent, 15 parts of a plasticizer, 25 parts of rubber powder, 6 parts of a lubricant, and 3 parts of a degradation promoter.
In this example 1, the reinforcing agent is nano calcium carbonate.
In this example 1, the plasticizer was polyethylene glycol-400.
In this embodiment 1, the method for preparing the high-performance environment-friendly packaging film includes the following steps:
(1) weighing the raw materials according to the raw material composition of the high-performance environment-friendly packaging film;
(2) mixing the raw materials weighed in the step (1) firstly, then mixing for 10min in a high-speed stirrer, sending the mixture into a double-screw extruder for extrusion, preserving the heat at 155-165 ℃ for 30-40 min after extrusion, cooling, stretching in two directions, and rolling to obtain the high-performance environment-friendly packaging film.
Embodiment 2 discloses a high-performance environment-friendly packaging film, which comprises, by weight, 115 parts of linear low-density polyethylene, 42 parts of polylactic acid, 36 parts of an ethylene-vinyl acetate copolymer, 32 parts of an ethylene-vinyl alcohol copolymer, 22 parts of polyvinyl alcohol, 18 parts of chitosan, 0.6 part of tetra [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 1.25 parts of ferric stearate, 17 parts of a reinforcing agent, 17 parts of a plasticizer, 25 parts of rubber powder, 6 parts of a lubricant, and 3 parts of a degradation promoter.
In this example 2, the reinforcing agent is a mixture of nano calcium carbonate and glass fiber.
In this example 2, the plasticizer is citric acid ester.
In this embodiment 2, the method for preparing the high-performance environment-friendly packaging film includes the following steps:
(1) weighing the raw materials according to the raw material composition of the high-performance environment-friendly packaging film;
(2) mixing the raw materials weighed in the step (1) firstly, then mixing for 10min in a high-speed stirrer, sending the mixture into a double-screw extruder for extrusion, preserving the heat at 155-165 ℃ for 30-40 min after extrusion, cooling, stretching in two directions, and rolling to obtain the high-performance environment-friendly packaging film.
Embodiment 3A high-performance environment-friendly packaging film comprises, by weight, 110 parts of linear low-density polyethylene, 40 parts of polylactic acid, 35 parts of an ethylene-vinyl acetate copolymer, 28 parts of an ethylene-vinyl alcohol copolymer, 20 parts of polyvinyl alcohol, 17 parts of chitosan, 0.5 part of tetra [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 0.9 part of ferric stearate, 16 parts of a reinforcing agent, 16.5 parts of a plasticizer, 25 parts of rubber powder, 6 parts of a lubricant, and 3 parts of a degradation promoter.
In this example 3, the reinforcing agent is a mixture of nano calcium carbonate, nano silica and glass fiber.
In this example 3, the plasticizer is a mixture of polyethylene glycol-400 and epoxidized soybean oil.
In this embodiment 3, the method for preparing the high-performance environment-friendly packaging film includes the following steps:
(1) weighing the raw materials according to the raw material composition of the high-performance environment-friendly packaging film;
(2) mixing the raw materials weighed in the step (1) firstly, then mixing for 10min in a high-speed stirrer, sending the mixture into a double-screw extruder for extrusion, preserving the heat at 155-165 ℃ for 30-40 min after extrusion, cooling, stretching in two directions, and rolling to obtain the high-performance environment-friendly packaging film.
The high-performance environment-friendly packaging films obtained in examples 1 to 3 are tested, and the high-performance environment-friendly packaging films obtained in examples 1 to 3 and commercially available degradable packaging films are used for measuring an induction period and an embrittlement period, wherein the induction period and the embrittlement period are expressed by the reduction degree of elongation at break in a photooxidation evaluation method, and the exposure time when the retention value of the elongation at break reaches 80% of the initial value is the induction period; the exposure time at 20% is the embrittlement period. And (3) testing conditions are as follows: the test was carried out using an ultraviolet ray artificial accelerated aging test chamber (length 2.4m, width 1.2m, height 0.4m, 6 lamps installed, 40w each). The bottom is provided with a tested film for carrying out an artificial accelerated photodegradation experiment. The film was cut into uniform square strips (42 cm long and 33cm wide). The distance between the film and the lamp tube is 20cm, the film is distributed in an effective light area of 45cm from the center to the two sides of the film frame, and the temperature in the box is (35 +/-3) DEG C. The elongation at break is measured using the GB9687-1988 standard. The high-performance environment-friendly packaging film disclosed by the invention not only has excellent mechanical properties such as tensile strength and elongation at break, but also is high in degradation speed
The above examples are merely representative of preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, various changes, modifications and substitutions can be made without departing from the spirit of the present invention, and these are all within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. The high-performance environment-friendly packaging film is characterized by comprising the following raw materials, by weight, 100-120 parts of linear low-density polyethylene, 35-45 parts of polylactic acid, 30-40 parts of an ethylene-vinyl acetate copolymer, 20-35 parts of an ethylene-vinyl alcohol copolymer, 18-25 parts of polyvinyl alcohol, 14-22 parts of chitosan, 0.4-0.65 part of pentaerythrityl tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], 0.7-1.4 parts of ferric stearate, 14-18 parts of a reinforcing agent, 15-18 parts of a plasticizer, 20-30 parts of rubber powder, 3-8 parts of a lubricant and 1.5-5 parts of a degradation promoter.
2. The high-performance environment-friendly packaging film as claimed in claim 1, which is prepared from the following raw materials, by weight, 105-115 parts of linear low-density polyethylene, 38-42 parts of polylactic acid, 32-36 parts of an ethylene-vinyl acetate copolymer, 24-32 parts of an ethylene-vinyl alcohol copolymer, 19-22 parts of polyvinyl alcohol, 16-18 parts of chitosan, 0.45-0.6 part of tetra [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 0.85-1.25 parts of ferric stearate, 15-17 parts of a reinforcing agent, 16-17 parts of a plasticizer, 22-28 parts of rubber powder, 5-7 parts of a lubricant, and 2-4 parts of a degradation promoter.
3. The high-performance environment-friendly packaging film as claimed in claim 1, wherein the raw materials comprise, by weight, 110 parts of linear low density polyethylene, 40 parts of polylactic acid, 35 parts of ethylene-vinyl acetate copolymer, 28 parts of ethylene-vinyl alcohol copolymer, 20 parts of polyvinyl alcohol, 17 parts of chitosan, 0.5 part of tetra [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, 0.9 part of ferric stearate, 16 parts of reinforcing agent, 16.5 parts of plasticizer, 25 parts of rubber powder, 6 parts of lubricant and 3 parts of degradation promoter.
4. The high-performance environment-friendly packaging film according to any one of claims 1 to 3, wherein the reinforcing agent is one or more of nano calcium carbonate, nano silica and glass fiber.
5. The high-performance environment-friendly packaging film according to any one of claims 1 to 3, wherein the plasticizer is one or more of polyethylene glycol-400, epoxidized soybean oil and citrate.
6. A method for preparing the high-performance environment-friendly packaging film as defined in any one of claims 1 to 3, comprising the steps of:
(1) weighing the raw materials according to the raw material composition of the high-performance environment-friendly packaging film;
(2) mixing the raw materials weighed in the step (1) firstly, then mixing for 10min in a high-speed stirrer, sending the mixture into a double-screw extruder for extrusion, preserving the heat at 155-165 ℃ for 30-40 min after extrusion, cooling, stretching in two directions, and rolling to obtain the high-performance environment-friendly packaging film.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911312870.1A CN111117045A (en) | 2019-12-18 | 2019-12-18 | High-performance environment-friendly packaging film and preparation method thereof |
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| CN201911312870.1A CN111117045A (en) | 2019-12-18 | 2019-12-18 | High-performance environment-friendly packaging film and preparation method thereof |
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| CN111117045A true CN111117045A (en) | 2020-05-08 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111995786A (en) * | 2020-09-14 | 2020-11-27 | 河源昆腾电子科技有限公司 | High-weather-resistance energy-saving environment-friendly film and preparation method thereof |
| CN112266529A (en) * | 2020-10-25 | 2021-01-26 | 太仓市鸿运包装材料有限公司 | High-performance environment-friendly packaging film and preparation method thereof |
| CN114350125A (en) * | 2021-12-13 | 2022-04-15 | 王玲芝 | Hydrophobic environment-friendly degradable composite packaging film |
-
2019
- 2019-12-18 CN CN201911312870.1A patent/CN111117045A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111995786A (en) * | 2020-09-14 | 2020-11-27 | 河源昆腾电子科技有限公司 | High-weather-resistance energy-saving environment-friendly film and preparation method thereof |
| CN112266529A (en) * | 2020-10-25 | 2021-01-26 | 太仓市鸿运包装材料有限公司 | High-performance environment-friendly packaging film and preparation method thereof |
| CN114350125A (en) * | 2021-12-13 | 2022-04-15 | 王玲芝 | Hydrophobic environment-friendly degradable composite packaging film |
| WO2023108818A1 (en) * | 2021-12-13 | 2023-06-22 | 王玲芝 | Hydrophobic, environmentally-friendly, and degradable composite packaging film |
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