CN113580704A - Anaerobic biodegradable BOPP film and preparation method thereof - Google Patents
Anaerobic biodegradable BOPP film and preparation method thereof Download PDFInfo
- Publication number
- CN113580704A CN113580704A CN202110574147.1A CN202110574147A CN113580704A CN 113580704 A CN113580704 A CN 113580704A CN 202110574147 A CN202110574147 A CN 202110574147A CN 113580704 A CN113580704 A CN 113580704A
- Authority
- CN
- China
- Prior art keywords
- anaerobic
- surface layer
- bopp film
- polypropylene
- biodegradable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011127 biaxially oriented polypropylene Substances 0.000 title claims abstract description 37
- 229920006378 biaxially oriented polypropylene Polymers 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000002344 surface layer Substances 0.000 claims abstract description 42
- 239000012792 core layer Substances 0.000 claims abstract description 30
- 238000006065 biodegradation reaction Methods 0.000 claims abstract description 28
- 239000004743 Polypropylene Substances 0.000 claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- -1 polypropylene Polymers 0.000 claims abstract description 27
- 229920001155 polypropylene Polymers 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229920005629 polypropylene homopolymer Polymers 0.000 claims abstract description 14
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 13
- 239000002216 antistatic agent Substances 0.000 claims abstract description 10
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 8
- 239000000194 fatty acid Substances 0.000 claims abstract description 8
- 229930195729 fatty acid Natural products 0.000 claims abstract description 8
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 8
- 102000016938 Catalase Human genes 0.000 claims abstract description 7
- 108010053835 Catalase Proteins 0.000 claims abstract description 7
- 102000019197 Superoxide Dismutase Human genes 0.000 claims abstract description 7
- 108010012715 Superoxide dismutase Proteins 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000008104 plant cellulose Substances 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 27
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 24
- 239000002994 raw material Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 239000004408 titanium dioxide Substances 0.000 claims description 12
- 238000001125 extrusion Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 7
- 230000032683 aging Effects 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- NDLNTMNRNCENRZ-UHFFFAOYSA-N 2-[2-hydroxyethyl(octadecyl)amino]ethanol Chemical group CCCCCCCCCCCCCCCCCCN(CCO)CCO NDLNTMNRNCENRZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 8
- 239000001569 carbon dioxide Substances 0.000 abstract description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 229920000704 biodegradable plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 229920000747 poly(lactic acid) Polymers 0.000 description 3
- 239000004626 polylactic acid Substances 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 229960000583 acetic acid Drugs 0.000 description 2
- 235000011054 acetic acid Nutrition 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 229920006238 degradable plastic Polymers 0.000 description 2
- 238000000855 fermentation Methods 0.000 description 2
- 230000004151 fermentation Effects 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 238000010525 oxidative degradation reaction Methods 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000426 Microplastic Polymers 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/242—All polymers belonging to those covered by group B32B27/32
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/51—Elastic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/716—Degradable
- B32B2307/7163—Biodegradable
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
The invention discloses an anaerobic biodegradable BOPP film and a preparation method thereof, and relates to the technical field of films, wherein the BOPP film sequentially comprises an upper surface layer, a core layer and a lower surface layer, and the upper surface layer comprises the following components in percentage by weight: 2-4 wt% of anti-blocking master batch, 0.5-1.5 wt% of anaerobic biodegradation agent and 94.5-97.5 wt% of homo-polypropylene; the core layer consists of the following components in percentage by weight: 0.5-1.5 wt% of anaerobic biodegradation agent, 95.5-98.5 wt% of homopolymerized polypropylene and 1-3 wt% of antistatic agent; the lower surface layer consists of the following components in percentage by weight: 98.5-99.5 wt% of homo-polypropylene and 0.5-1.5 wt% of anaerobic biodegradation agent; wherein, the anaerobic biodegradation agent is prepared by melting, blending and extruding higher fatty acid, plant cellulose, catalase, superoxide dismutase and homopolymerized polypropylene. The BOPP film prepared by the invention has good tensile strength and high transparency, can be completely decomposed into water, carbon dioxide, methane and organic matters in an environment rich in anaerobic organisms, and is environment-friendly, safe and reliable.
Description
Technical Field
The invention relates to the technical field of films, in particular to an anaerobic biodegradable BOPP film and a preparation method thereof.
Background
With the development of science and technology and the progress of society, global environmental problems such as plastic pollution and the like, which human beings rely on to live, begin to be concerned all over the world. Plastic pollution can cause huge economic loss and can also cause certain influence on the environment; in addition, when the plastic is crushed and buried, the micro plastic particles and additives in the plastic can permeate into soil and contact human bodies through various natural circulation, drinking water, food and the like, and cancer, immunity damage or other diseases are likely to be caused.
The commonly used degradable plastic films in the market at present comprise starch-based biodegradable plastics, polylactic acid biodegradable plastics, oxidative degradation and other degradable plastics. Starch-based biodegradable plastics can only be finally decomposed into fragments, and complete biodegradation can not be realized in the true sense. The polylactic acid biodegradable plastic is easy to thermally degrade when being processed at high temperature, the strength of the film is reduced, and the raw material and processing cost of the polylactic acid are high. Oxidative degradation occurs in an aerobic environment, but the additive is metal salt which pollutes soil, and waste materials cannot be recycled in the production process. The anaerobic biodegradable film is formed by decomposing a plastic film into water, carbon dioxide, methane and organic matters finally under an anaerobic environment through hydrolysis, fermentation, hydrogen production, acetic acid production and methane production stages of anaerobic microorganisms existing in the nature, however, the existing anaerobic biodegradable film has the problems of low degradation rate and incomplete degradation.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides the anaerobic biodegradable BOPP film and the preparation method thereof, and the prepared film has good tensile strength and high transparency, can be completely decomposed into water, carbon dioxide, methane and organic matters in an environment rich in anaerobic organisms, and is environment-friendly, safe and reliable.
The invention provides an anaerobic biodegradable BOPP film which sequentially comprises an upper surface layer, a core layer and a lower surface layer, wherein the upper surface layer comprises the following components in percentage by weight: 2-4 wt% of anti-blocking master batch, 0.5-1.5 wt% of anaerobic biodegradation agent and 94.5-97.5 wt% of homo-polypropylene;
the core layer consists of the following components in percentage by weight: 0.5-1.5 wt% of anaerobic biodegradation agent, 95.5-98.5 wt% of homopolymerized polypropylene and 1-3 wt% of antistatic agent;
the lower surface layer consists of the following components in percentage by weight: 98.5-99.5 wt% of homo-polypropylene and 0.5-1.5 wt% of anaerobic biodegradation agent;
wherein, the anaerobic biodegradation agent is prepared by melting, blending and extruding higher fatty acid, plant cellulose, catalase, superoxide dismutase and homopolymerized polypropylene.
Preferably, the anaerobic biodegradation agent is prepared by melt blending and extruding the following raw materials in percentage by weight: 60 wt% of higher fatty acid, 34 wt% of plant cellulose, 3 wt% of catalase and 3 wt% of superoxide dismutase.
Preferably, the anti-blocking master batch is prepared by co-extruding homo-polypropylene and titanium dioxide; wherein the particle size of the titanium dioxide is 2-5 μm.
Preferably, the effective component of the antistatic agent is N, N-bis (2-hydroxyethyl) octadecylamine.
Preferably, the isotactic degree of the homopolymerized polypropylene is 96-97%, and the melt index is 2-4 g/10min under the condition of 230 ℃/2.16 kg.
Preferably, the thicknesses of the upper surface layer, the core layer and the lower surface layer are respectively 2-4 μm, 10-55 μm and 1 μm.
The invention also provides a preparation method of the anaerobic biodegradable BOPP film, which comprises the following steps:
s1, respectively adding the raw materials of the upper surface layer, the core layer and the lower surface layer into different extruders for melt extrusion, and filtering by a filter screen to obtain an upper surface layer melt, a core layer melt and a lower surface layer melt;
s2, converging and extruding the upper-layer melt, the core-layer melt and the lower-layer melt in a three-layer T-shaped structural die head to obtain a membrane;
s3, attaching the membrane to a chill roll to be quenched to form a cast sheet, cooling in a water bath, and finally removing water to obtain a dry cast sheet;
s4, longitudinally drawing, transversely drawing and corona treating the cast sheet to obtain a mother film, and cutting the mother film after aging treatment to obtain the anaerobic biodegradable BOPP film.
Preferably, in S1, the extrusion temperature of the extruder is 240-255 ℃.
Preferably, in S3, the chilling roller temperature is 30-35 ℃, and the water bath temperature is 30-35 ℃.
Preferably, in S4, the longitudinal drawing process temperature is 110-120 ℃ in the preheating upper area, 110-120 ℃ in the lower area, 100-110 ℃ in the drawing upper area, 110-115 ℃ in the lower area, 110-120 ℃ in the shaping upper area, 110-120 ℃ in the lower area, and the longitudinal drawing ratio is 4.0-4.5; the preheating temperature of the transverse drawing process is 160-170 ℃, the drawing temperature is 155-160 ℃, the setting temperature is 120-130 ℃, and the distance between two sides of the transverse drawing chain track is 8.5-9.5 times of the width of a cast sheet.
Has the advantages that: the invention prepares the anaerobic biodegradation agent by melting and blending higher fatty acid, plant cellulose, catalase and superoxide dismutase, and adds the anaerobic biodegradation agent into each layer of raw materials of the BOPP film, in the preparation process of the film, the higher fatty acid is embedded into a polypropylene molecular chain, the polypropylene macromolecular chain is destroyed in an anaerobic environment, and all components in the anaerobic biodegradation agent are matched with each other to induce anaerobic bacteria and provide nutrition conditions and anaerobic environment conditions thereof, thereby accelerating the degradation rate; the organic matters are biochemically degraded through the metabolism of anaerobic bacteria and facultative bacteria and through a hydrolysis stage, a fermentation stage, a hydrogen-producing and acetic-acid-producing stage and a methane-producing stage, and the method is environment-friendly, safe and reliable. According to the invention, on the basis of not changing the original BOPP production process, the environment-friendly full-degradable film which is low in cost and can be rapidly degraded is obtained by adding the film raw material, the prepared film has good tensile strength and high transparency, can be completely decomposed into water, carbon dioxide, methane and organic matters in an environment rich in anaerobic organisms, and is environment-friendly, safe and reliable.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
In the following examples, the isotactic degree of the homo-polypropylene is 96-97%, and the melt index is 2-4 g/10min under the condition of 230 ℃/2.16 kg; the active ingredient of the antistatic agent is N, N-bis (2-hydroxyethyl) octadecylamine; the anaerobic biodegradation agent is prepared by melt blending and extruding the following raw materials in percentage by weight: 60 wt% of higher fatty acid, 34 wt% of plant cellulose, 3 wt% of catalase and 3 wt% of superoxide dismutase.
Example 1
The anaerobic biodegradable BOPP film provided by the invention sequentially comprises an upper surface layer, a core layer and a lower surface layer, wherein the thickness of each layer is sequentially 2 micrometers, 22 micrometers and 1 micrometer.
The upper surface layer consists of the following components in percentage by weight: 2 wt% of anti-blocking master batch, 0.5 wt% of anaerobic biodegradation agent and 97.5 wt% of homopolymerized polypropylene; the core layer consists of the following components in percentage by weight: 0.5 wt% of anaerobic biodegradation agent, 98.5 wt% of homo-polypropylene and 1 wt% of antistatic agent; the lower surface layer consists of the following components in percentage by weight: 99.5 wt% of homopolymerized polypropylene and 0.5 wt% of anaerobic biodegradation agent;
wherein, the anti-blocking master batch is prepared by co-extruding homopolymerized polypropylene and titanium dioxide, and the particle size of the titanium dioxide is 3 μm.
The preparation method of the anaerobic biodegradable BOPP film comprises the following steps:
s1, respectively adding the raw materials of the upper surface layer, the core layer and the lower surface layer into different extruders for melt extrusion, and filtering by a filter screen to obtain an upper surface layer melt, a core layer melt and a lower surface layer melt; wherein the extrusion temperature of the extruder is 240-255 ℃; after the raw materials of each component of the upper surface layer are melted and extruded, filtering by a filter screen with 150 meshes; after the raw materials of each component of the core layer and the lower surface layer are melted and extruded, filtering by using a 320-mesh filter screen respectively;
s2, converging and extruding the upper-layer melt, the core-layer melt and the lower-layer melt in a three-layer T-shaped structural die head to obtain a membrane;
s3, attaching the membrane to a chill roll to be quenched to form a cast sheet, cooling in a water bath, and finally removing water to obtain a dry cast sheet; wherein the temperature of the chilling roller is 30 ℃, and the temperature of the water bath is 30 ℃;
s4, longitudinally drawing, transversely drawing and corona treating the cast sheet to obtain a mother film, wherein the longitudinal drawing process temperature is that the upper preheating area is 110-120 ℃, the lower area is 110-120 ℃, the upper drawing area is stretched by 100-110 ℃, the lower area is 110-115 ℃, the upper shaping area is shaped by 110-120 ℃, the lower area is stretched by 110-120 ℃, and the longitudinal drawing ratio is 4.5; the preheating temperature of the transverse drawing process is 160-170 ℃, the drawing temperature is 155-160 ℃, the setting temperature is 120-130 ℃, and the distance between two sides of a transverse drawing chain rail is 9.0 times of the width of a cast sheet; and then cutting the mother film after aging treatment to obtain the anaerobic biodegradable BOPP film.
Example 2
The anaerobic biodegradable BOPP film provided by the invention sequentially comprises an upper surface layer, a core layer and a lower surface layer, wherein the thickness of each layer is 3 micrometers, 21 micrometers and 1 micrometer in sequence.
The upper surface layer consists of the following components in percentage by weight: 2 wt% of anti-blocking master batch, 1 wt% of anaerobic biodegradation agent and 97 wt% of homopolymerized polypropylene; the core layer consists of the following components in percentage by weight: 1 wt% of anaerobic biodegradation agent, 98 wt% of homo-polypropylene and 1 wt% of antistatic agent; the lower surface layer consists of the following components in percentage by weight: 99 wt% of homopolymerized polypropylene and 1 wt% of anaerobic biodegradation agent;
wherein, the anti-blocking master batch is prepared by co-extruding homopolymerized polypropylene and titanium dioxide, and the particle size of the titanium dioxide is 3 μm.
The preparation method of the anaerobic biodegradable BOPP film is the same as that of example 1.
Example 3
The anaerobic biodegradable BOPP film provided by the invention sequentially comprises an upper surface layer, a core layer and a lower surface layer, wherein the thickness of each layer is sequentially 4 micrometers, 20 micrometers and 1 micrometer.
The upper surface layer consists of the following components in percentage by weight: 2 wt% of anti-blocking master batch, 1.5 wt% of anaerobic biodegradation agent and 96.5 wt% of homopolymerized polypropylene; the core layer consists of the following components in percentage by weight: 1.5 wt% of anaerobic biodegradation agent, 97.5 wt% of homopolymerized polypropylene and 1 wt% of antistatic agent; the lower surface layer consists of the following components in percentage by weight: 98.5 wt% of homo-polypropylene and 1.5 wt% of anaerobic biodegradation agent;
wherein, the anti-blocking master batch is prepared by co-extruding homopolymerized polypropylene and titanium dioxide, and the particle size of the titanium dioxide is 3 μm.
The preparation method of the anaerobic biodegradable BOPP film is the same as that of example 1.
Comparative example
A BOPP film comprises an anti-sticking layer, a core layer and a polypropylene layer in sequence, wherein the thickness of each layer is 2 micrometers, 22 micrometers and 1 micrometer in sequence.
The anti-sticking layer consists of the following components in percentage by weight: 2 wt% of anti-blocking master batch and 98% of homopolymerized polypropylene; the core layer consists of the following components in percentage by weight: 99 wt% of homopolymerized polypropylene and 1 wt% of antistatic agent; the polypropylene layer consists of the following components in percentage by weight: 100 wt% of homo-polypropylene;
wherein, the anti-blocking master batch is prepared by co-extruding homopolymerized polypropylene and titanium dioxide, and the particle size of the titanium dioxide is 3 μm.
The preparation method of the BOPP film comprises the following steps:
s1, respectively adding the raw materials of the anti-sticking layer, the core layer and the polypropylene layer into different extruders for melt extrusion, and filtering by a filter screen to obtain an anti-sticking layer melt, a core layer melt and a polypropylene layer melt; wherein the extrusion temperature of the extruder is 240-255 ℃; after the raw materials of each component of the anti-sticking layer are melted and extruded, filtering by a filter screen with 150 meshes; after the raw materials of each component of the core layer and the polypropylene layer are melt extruded, filtering by using a 320-mesh filter screen respectively;
s2, converging and extruding the anti-sticking layer melt, the core layer melt and the polypropylene layer melt in a three-layer T-shaped structure die head to obtain a membrane;
s3, attaching the membrane to a chill roll to be quenched to form a cast sheet, cooling in a water bath, and finally removing water to obtain a dry cast sheet; wherein the temperature of the chilling roller is 30 ℃, and the temperature of the water bath is 30 ℃;
s4, longitudinally drawing, transversely drawing and corona treating the cast sheet to obtain a mother film, wherein the longitudinal drawing process temperature is that the upper preheating area is 110-120 ℃, the lower area is 110-120 ℃, the upper drawing area is stretched by 100-110 ℃, the lower area is 110-115 ℃, the upper shaping area is shaped by 110-120 ℃, the lower area is stretched by 110-120 ℃, and the longitudinal drawing ratio is 4.5; the preheating temperature of the transverse drawing process is 160-170 ℃, the drawing temperature is 155-160 ℃, the setting temperature is 120-130 ℃, and the distance between two sides of a transverse drawing chain rail is 9.0 times of the width of a cast sheet; and cutting the mother film after aging treatment to obtain the BOPP film.
To verify the effect of the present invention, the BOPP films prepared in the above examples 1 to 3 and comparative example were subjected to a comparative test, and the test results are shown in table 1:
table 1 main physical property index data of the BOPP films prepared in table 1
Remarking: total carbon content test standard was according to ASTM D5511.
As shown in Table 1, the anaerobic biodegradable BOPP film prepared by the invention has basically consistent tensile strength and friction coefficient compared with the common BOPP film under the condition of the same thickness, and the film is obviously higher in decomposition speed than the common BOPP film in anaerobic biological decomposition.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The anaerobic biodegradable BOPP film sequentially comprises an upper surface layer, a core layer and a lower surface layer, and is characterized in that the upper surface layer consists of the following components in percentage by weight: 2-4 wt% of anti-blocking master batch, 0.5-1.5 wt% of anaerobic biodegradation agent and 94.5-97.5 wt% of homo-polypropylene;
the core layer consists of the following components in percentage by weight: 0.5-1.5 wt% of anaerobic biodegradation agent, 95.5-98.5 wt% of homopolymerized polypropylene and 1-3 wt% of antistatic agent;
the lower surface layer consists of the following components in percentage by weight: 98.5-99.5 wt% of homo-polypropylene and 0.5-1.5 wt% of anaerobic biodegradation agent;
wherein, the anaerobic biodegradation agent is prepared by melting, blending and extruding higher fatty acid, plant cellulose, catalase, superoxide dismutase and homopolymerized polypropylene.
2. The anaerobic biodegradable BOPP film according to claim 1, wherein the anaerobic biodegradation agent is prepared by melt blending and extrusion of the following raw materials in percentage by weight: 60 wt% of higher fatty acid, 34 wt% of plant cellulose, 3 wt% of catalase and 3 wt% of superoxide dismutase.
3. The anaerobic biodegradable BOPP film according to claim 1, wherein the anti-blocking master batch is prepared by co-extruding homo-polypropylene and titanium dioxide; wherein the particle size of the titanium dioxide is 2-5 μm.
4. The anaerobic biodegradable BOPP film according to claim 1, wherein the effective component of the antistatic agent is N, N-bis (2-hydroxyethyl) octadecylamine.
5. The anaerobic biodegradable BOPP film according to claim 1, wherein the isotactic degree of the homo-polypropylene is 96-97%, and the melt index is 2-4 g/10min under the condition of 230 ℃/2.16 kg.
6. The anaerobic biodegradable BOPP film according to any one of claims 1 to 5, wherein the thicknesses of the upper surface layer, the core layer and the lower surface layer are respectively 2-4 μm, 10-55 μm and 1 μm.
7. A process for the preparation of anaerobic biodegradable BOPP film according to any of claims 1 to 6, comprising the following steps:
s1, respectively adding the raw materials of the upper surface layer, the core layer and the lower surface layer into different extruders for melt extrusion, and filtering by a filter screen to obtain an upper surface layer melt, a core layer melt and a lower surface layer melt;
s2, converging and extruding the upper-layer melt, the core-layer melt and the lower-layer melt in a three-layer T-shaped structural die head to obtain a membrane;
s3, attaching the membrane to a chill roll to be quenched to form a cast sheet, cooling in a water bath, and finally removing water to obtain a dry cast sheet;
s4, longitudinally drawing, transversely drawing and corona treating the cast sheet to obtain a mother film, and cutting the mother film after aging treatment to obtain the anaerobic biodegradable BOPP film.
8. The method for preparing anaerobic biodegradable BOPP film according to claim 7, wherein in S1, the extrusion temperature of the extruder is 240-255 ℃.
9. The method for preparing the anaerobic biodegradable BOPP film according to claim 7, wherein in S3, the temperature of the chill roll is 30-35 ℃, and the temperature of the water bath is 30-35 ℃.
10. The preparation method of the anaerobic biodegradable BOPP film according to claim 7, wherein in S4, the longitudinal drawing process temperature is 110-120 ℃ in the preheating upper area, 110-120 ℃ in the lower area, 100-110 ℃ in the drawing upper area, 110-115 ℃ in the lower area, 110-120 ℃ in the shaping upper area, 110-120 ℃ in the lower area, and the longitudinal drawing ratio is 4.0-4.5; the preheating temperature of the transverse drawing process is 160-170 ℃, the drawing temperature is 155-160 ℃, the setting temperature is 120-130 ℃, and the distance between two sides of the transverse drawing chain track is 8.5-9.5 times of the width of a cast sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110574147.1A CN113580704A (en) | 2021-05-25 | 2021-05-25 | Anaerobic biodegradable BOPP film and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110574147.1A CN113580704A (en) | 2021-05-25 | 2021-05-25 | Anaerobic biodegradable BOPP film and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113580704A true CN113580704A (en) | 2021-11-02 |
Family
ID=78243353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110574147.1A Pending CN113580704A (en) | 2021-05-25 | 2021-05-25 | Anaerobic biodegradable BOPP film and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113580704A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019736A (en) * | 2010-09-18 | 2011-04-20 | 浙江凯利包装材料有限公司 | Oxo-biodegradable BOPP (biaxially-oriented polypropylene) film and preparation method thereof |
| CN102950857A (en) * | 2012-11-14 | 2013-03-06 | 海南赛诺实业有限公司 | Degradable biaxially oriented polypropylene cigarette packaging film and manufacturing method thereof |
| CN110936687A (en) * | 2019-12-13 | 2020-03-31 | 福建兰天包装材料有限公司 | Low-glossiness anaerobic biodegradable biaxially oriented polypropylene film |
| CN112267212A (en) * | 2020-10-15 | 2021-01-26 | 深圳市通产丽星股份有限公司 | Biodegradable polypropylene composite material, melt-blown non-woven fabric and application thereof |
-
2021
- 2021-05-25 CN CN202110574147.1A patent/CN113580704A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102019736A (en) * | 2010-09-18 | 2011-04-20 | 浙江凯利包装材料有限公司 | Oxo-biodegradable BOPP (biaxially-oriented polypropylene) film and preparation method thereof |
| CN102950857A (en) * | 2012-11-14 | 2013-03-06 | 海南赛诺实业有限公司 | Degradable biaxially oriented polypropylene cigarette packaging film and manufacturing method thereof |
| CN110936687A (en) * | 2019-12-13 | 2020-03-31 | 福建兰天包装材料有限公司 | Low-glossiness anaerobic biodegradable biaxially oriented polypropylene film |
| CN112267212A (en) * | 2020-10-15 | 2021-01-26 | 深圳市通产丽星股份有限公司 | Biodegradable polypropylene composite material, melt-blown non-woven fabric and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| 克里斯托弗•布莱尔•克劳福德: "《微塑料污染物》" * |
| 李建军: "《塑料配方设计》", 30 September 2019 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102019736B (en) | Oxo-biodegradable BOPP (biaxially-oriented polypropylene) film and preparation method thereof | |
| CN110576665A (en) | antibacterial biodegradable biaxially-oriented polylactic acid film and preparation method thereof | |
| CN109094159B (en) | Anti-fog and antibacterial BOPP film and preparation method thereof | |
| CN111703166A (en) | High-barrier fully biodegradable BOPLA film and preparation method thereof | |
| CN112297560A (en) | Antibacterial two-way stretching polylactic acid film capable of being directly heat-sealed and preparation method thereof | |
| WO2011143570A1 (en) | Method to reprocess polyactic acid resin and articles | |
| CN102152575A (en) | Antibacterial antifog film for packaging food and production process thereof | |
| CN111703158A (en) | Antibacterial biaxially oriented polyvinyl alcohol film and preparation method thereof | |
| CN112644123A (en) | Toughened biaxially-oriented polylactic acid film and preparation method thereof | |
| CN110936687A (en) | Low-glossiness anaerobic biodegradable biaxially oriented polypropylene film | |
| CN111808387A (en) | Polyvinyl chloride mulching film and preparation method thereof | |
| CN113580704A (en) | Anaerobic biodegradable BOPP film and preparation method thereof | |
| CN114591582A (en) | Photo-biodegradable plastic film and preparation method thereof | |
| CN114276658A (en) | Degradable material, preparation method thereof and paper cup | |
| WO1998004626A2 (en) | Biaxially stretched, biodegradable and compostable foil | |
| CN110079070B (en) | Processing technology for degrading water seepage farmland covering film and application thereof | |
| CN112159544B (en) | Environment-friendly high-barrier film and preparation method thereof | |
| CN111038052A (en) | High-glossiness anaerobic biodegradable biaxially oriented polypropylene film | |
| CN116003900B (en) | Special material for regenerated PET and PE blending modified blown film, and manufacturing method and application thereof | |
| CN113927987A (en) | Full-biodegradable self-adhesive preservative film and preparation method thereof | |
| CN107474490A (en) | Heparin tube environment-friendly type polyester master batch and preparation method thereof | |
| CN115042495B (en) | Full-biodegradation high-vapor barrier preservative film and preparation method thereof | |
| CN115558251B (en) | Composition for biodegradable preservative film | |
| CN117162625A (en) | Reed-based biodegradable shrink film | |
| CN112874091A (en) | Anti-aging biodegradable film and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211102 |