CN111087771A - Biodegradable agricultural mulching film and production process thereof - Google Patents
Biodegradable agricultural mulching film and production process thereof Download PDFInfo
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- CN111087771A CN111087771A CN201911393263.2A CN201911393263A CN111087771A CN 111087771 A CN111087771 A CN 111087771A CN 201911393263 A CN201911393263 A CN 201911393263A CN 111087771 A CN111087771 A CN 111087771A
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- mulching film
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- agricultural mulching
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/52—Polycarboxylic acids or polyhydroxy compounds in which at least one of the two components contains aliphatic unsaturation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
- C08G63/785—Preparation processes characterised by the apparatus used
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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
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/06—Unsaturated polyesters
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/28—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture specially adapted for farming
Abstract
The invention also provides a biodegradable agricultural mulching film and a production process thereof, wherein the production process of the biodegradable agricultural mulching film comprises the following steps: s1, mixing the dry material with the first solution to obtain a mixture, wherein the mass ratio of the dry material to the first solution is 25: 46; the dry material comprises: terephthalic acid and adipic acid, wherein the mass ratio of the terephthalic acid to the adipic acid is 2: 3; the first solution comprises: 1, 4-butanediol and human glycidyl methacrylate; s2, heating the second solution to 73 ℃, and mixing the mixture and the second solution in a reactor; s3, reacting the mixture and the second solution in a reactor to obtain an oligomer; s4, uniformly mixing the oligomer and the HDI chain extender at 180 ℃, and granulating to obtain copolyester; s5, uniformly mixing the antioxidant 168, the silicon dioxide, the UV-531 and the copolyester, and blowing out to obtain the biodegradable agricultural mulching film. The biodegradable agricultural mulching film and the production process thereof solve the problem of difficult land planting caused by the incapability of degrading the agricultural mulching film in the prior art.
Description
Technical Field
The invention relates to a film, in particular to a biodegradable agricultural mulching film and a production process thereof.
Background
The agricultural mulching film is a general name of plastic films applied to agricultural production, plays an important role in moisture preservation and heat preservation in a sowing period, and particularly has the advantages that a plurality of agricultural mulching films are remained in soil in a cotton planting process, so that a plurality of bad agricultural mulching films accumulated throughout the year are accumulated in the soil, the agricultural mulching films cannot be degraded in the soil, the soil property is changed, the plant growth in the soil is hindered, and the crop yield is reduced. The accumulation all year round can lead to the soil not being capable of planting crops, thus causing environmental pollution and being not beneficial to environmental protection.
Disclosure of Invention
The invention provides a biodegradable agricultural mulching film and a production process thereof, and solves the problem of difficult land planting caused by incapability of degrading the agricultural mulching film in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention firstly provides a biodegradable agricultural mulching film, which comprises:
the dry material comprises: terephthalic acid and adipic acid, wherein the mass ratio of the terephthalic acid to the adipic acid is 2: 3;
the first solution comprises: 1, 4-butanediol and human glycidyl methacrylate, wherein the mass ratio of the 1, 4-butanediol to the human glycidyl methacrylate is 45:1, and the mass ratio of the first solution to the dry materials is 46: 25; and
the second solution comprises: tetrabutyl titanate, the second solution to dry ratio being 71: 100.
The invention also provides a production process of the biodegradable agricultural mulching film, which comprises the following steps:
s1, mixing the dry material with the first solution to obtain a mixture, wherein the mass ratio of the dry material to the first solution is 25: 46; the dry material comprises: terephthalic acid and adipic acid, wherein the mass ratio of the terephthalic acid to the adipic acid is 2: 3; the first solution comprises: 1, 4-butanediol and human glycidyl methacrylate, wherein the mass ratio of the 1, 4-butanediol to the human glycidyl methacrylate is 45: 1;
s2, heating the second solution to 73 ℃, and mixing the mixture and the second solution in a reactor;
s3, reacting the mixture and the second solution in a reactor to obtain an oligomer;
s4, uniformly mixing the oligomer and the HDI chain extender at 180 ℃, and granulating to obtain copolyester;
s5, uniformly mixing the antioxidant 168, the silicon dioxide, the UV-531 and the copolyester, and blowing out to obtain the biodegradable agricultural mulching film.
Preferably, step S1 includes the steps of:
s11, putting dry materials into a dry material weighing container on the reactor, and putting the first solution into a wet material weighing container on the reactor;
s12, judging whether the ratio of the dry material mass in the dry material weighing container to the first solution mass in the wet material weighing container is a specified value, if so, performing a step S13, and if not, obtaining no mixture and operating again;
s13, starting a rotary driving device on the reactor, and driving the screw rod in the conveying cylinder to rotate by the rotary driving device;
s14, opening a second valve at the bottom of the wet material weighing container, and putting the first solution into the top of the conveying cylinder through a second conveying pipe;
s15, opening a first valve at the bottom of the dry material weighing container, putting the dry materials into the middle of a conveying cylinder through a first conveying pipe, enabling the rotating first solution to be in contact with the dry materials and mixed through a screw rod to obtain a mixture, and conveying the mixture into the reactor through the conveying cylinder.
Preferably, the time interval between the execution of step S14 and the execution of step S15 is 18 seconds to 22 seconds.
Compared with the prior art, the invention has the following beneficial effects:
the biodegradable mulching film can be manufactured by adopting the formula and the production process provided by the invention, and can be degraded after being buried in soil for a long time, so that the problem that the subsequent soil is continuously planted as the method because the mulching film is remained in the soil after being used for many years is avoided, the soil is protected, the environment is protected, meanwhile, the soil can be used for a long time, the use value of the soil is improved, and the production is improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a sectional view of a reactor used in the present invention.
Reference numerals: the device comprises a reaction tank 1, a dry material weighing container 2, a wet material weighing container 3, a rotary driving device 4, a screw 5, a stirring frame 6 and a conveying cylinder 7.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the functions of the invention clearer and easier to understand, the invention is further explained by combining the drawings and the detailed implementation mode:
the invention firstly provides a biodegradable agricultural mulching film, which comprises:
the dry material comprises: 40g of terephthalic acid and 60g of adipic acid;
the first solution comprises: 160g of 1, 4-butanediol and 4g of human glycidyl methacrylate; and
the second solution comprises: tetrabutyl titanate 71 g.
The invention also provides a production process of the biodegradable agricultural mulching film, which comprises the following steps:
s1, mixing the dry material with the first solution to obtain a mixture, wherein the mass ratio of the dry material to the first solution is 25: 46; the dry material comprises: terephthalic acid and adipic acid, wherein the mass ratio of the terephthalic acid to the adipic acid is 2: 3; the first solution comprises: 1, 4-butanediol and human glycidyl methacrylate, wherein the mass ratio of the 1, 4-butanediol to the human glycidyl methacrylate is 45: 1;
s2, heating the second solution to 73 ℃, and mixing the mixture and the second solution in a reactor;
s3, reacting the mixture and the second solution in a reactor to obtain an oligomer;
s4, uniformly mixing the oligomer and the HDI chain extender at 180 ℃, and granulating to obtain copolyester;
s5, uniformly mixing the antioxidant 168, the silicon dioxide, the UV-531 and the copolyester, and blowing out to obtain the biodegradable agricultural mulching film.
As shown in fig. 1, the reactor comprises: a reaction tank 1, a dry material weighing container 2, a wet material weighing container 3, a rotary driving device 4, a screw 5, a stirring frame 6 and a conveying cylinder 7, a reaction cavity is arranged in the reaction tank 1, the dry material weighing container 2 and the wet material weighing container 3 are installed at the top of the reaction tank 1, the reaction tank 1 supports the dry material weighing container 2 through a first weigher, a first valve is installed at the bottom of the dry material weighing container 2, the reaction tank 1 supports the wet material weighing container 3 through a second weigher, a second valve is installed at the bottom of the wet material weighing container 3, the conveying cylinder 7 is fixed on the top wall of the reaction cavity, the rotary driving device 4 is installed on the top surface of the reaction tank 1, the output end of the rotary driving device 4 is connected to the screw 5, the screw 5 passes through the conveying cylinder 7, the bottom end of the screw 5 is connected to the stirring frame 6, the conveying cylinder 7 is arranged between the dry material weighing container 2 and the wet material weighing container 3, the bottom of the dry material weighing, the wet material weighing container 3 is communicated to the top of the conveying cylinder 7 through a second conveying pipe, the outer wall of the reaction tank 1 is sleeved with an annular heater, and an air pump is communicated with the reaction tank 1. A heating tank is arranged beside the reaction tank 1 and used for heating a second solution, the heating tank is communicated with the reaction cavity in the reaction tank 1 through a solution pump, and the heater, the air pump, the heating tank, the solution pump, the first weighing device, the second weighing device, the first valve and the second valve are all connected with the control box.
In order to improve the production efficiency and ensure the production quality, the step S1 includes the following steps:
s11, putting dry materials into a dry material weighing container 2 on a reactor, wherein the mass ratio of the components in the dry materials is ensured to be the original ratio, weighing one component and then putting into the dry material weighing container 2, putting a first solution into a wet material weighing container 3 on the reactor, wherein the mass ratio of the components in the first solution is ensured to be the original ratio, and weighing one component and then putting into the wet material weighing container 3;
s12, judging whether the ratio of the mass of the dry materials in the dry material weighing container 2 to the mass of the first solution in the wet material weighing container 3 is a specified value, if so, performing a step S13, and if not, obtaining no mixture and operating again; when the dry material weighing container 2 and the wet material weighing container 3 are placed, the mass ratio of the dry material to the first solution is required to be ensured to be 25:46, the judgment is carried out in the control box, so that the subsequent steps can be continued after the dry material and the first solution are placed in proportion, otherwise, only the dry material and the first solution are respectively transferred from the dry material weighing container 2 and the wet material weighing container 3, and the operation is continued after the dry material and the first solution are re-weighed and configured;
s13, starting the rotary driving device 4 on the reactor, and driving the screw 5 in the conveying cylinder 7 to rotate by the rotary driving device 4;
s14, opening a second valve at the bottom of the wet material weighing container 3, putting a first solution into the top of the conveying cylinder 7 through a second conveying pipe, wetting the screw 5 and the inner wall of the conveying cylinder 7 by the first solution, avoiding dry material residue caused by firm adhesion after the outer wall of the screw 5 and the inner wall of the conveying cylinder 7 are contacted with each other firstly, and reducing the possibility that the dry material is adhered to the outer wall of the screw 5 and the outer wall of the conveying cylinder 7;
s15, opening a first valve at the bottom of a dry material weighing container 2, putting dry materials into the middle of a conveying cylinder 7 through a first conveying pipe, enabling a first rotating solution to be in contact with the dry materials and mixed by a screw rod 5 to obtain a mixture, conveying the mixture into a reactor by the conveying cylinder 7, enabling the dry materials to be in contact with the first solution at one point and one point, enabling the dry materials to be dissolved in the first solution, avoiding the phenomenon that the dry materials cannot be fully dissolved after being agglomerated due to the fact that a large lump of the dry materials is in contact with the first solution and the dry materials are not fully contacted with the first solution and agglomerated due to the fact that the dry materials are contacted with the first solution at one point and one point, enabling the screw rod 5 to have strong disturbance effect on the first solution and the dry materials to guarantee that the dry materials are fully contacted with the first solution, guaranteeing that the dry materials can be uniformly mixed with the first solution, achieving mixing in the process of inputting the dry materials and the first solution into a reaction chamber, and avoiding time waste caused by transferring the mixture into the reaction chamber after mixing in the prior, the production efficiency is improved, and the screw 5 and the stirring frame 6 share one rotary driving device 4, so that the problem that one rotary driving device 4 is required for mixing dry materials and the first solution and another rotary driving device 4 is required for mixing the mixture and the first solution in the prior art is avoided, and the use of the rotary driving device 4 is reduced.
In order to ensure that the first solution wets the delivery cylinder 7 before the dry material enters the delivery cylinder 7, the time interval between the steps S14 and S15 is 18 seconds to 22 seconds.
The biodegradable agricultural films obtained using the above formulation and process were tested for the percentage of biodegradation according to GB-T19277-2003-determination of the final aerobic biological decomposition and disintegration capacity of the material under controlled composting conditions-test methods using the method for determining the carbon dioxide released, while the general polyethylene agricultural films were also tested, with the following test results:
| number of days | The biodegradable agricultural mulching film | Common polyethylene agricultural mulching film |
| 0 | 0 | 0 |
| 30 | 14.52 | 0 |
| 60 | 26.8 | 0 |
| 90 | 48.8 | 0 |
The determination shows that the biodegradable agricultural mulching film has stronger biodegradable performance compared with the common polyethylene agricultural mulching film, can be slowly degraded in soil, and can meet the requirements of sustainable development of soil and good environmental protection in modern agriculture.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (4)
1. A biodegradable agricultural mulching film, comprising:
the dry material comprises: terephthalic acid and adipic acid, wherein the mass ratio of the terephthalic acid to the adipic acid is 2: 3;
the first solution comprises: 1, 4-butanediol and human glycidyl methacrylate, wherein the mass ratio of the 1, 4-butanediol to the human glycidyl methacrylate is 45:1, and the mass ratio of the first solution to the dry materials is 46: 25; and
the second solution comprises: tetrabutyl titanate, the second solution to dry ratio being 71: 100.
2. A production process of a biodegradable agricultural mulching film is characterized by comprising the following steps:
s1, mixing the dry material with the first solution to obtain a mixture, wherein the mass ratio of the dry material to the first solution is 25: 46; the dry material comprises: terephthalic acid and adipic acid, wherein the mass ratio of the terephthalic acid to the adipic acid is 2: 3; the first solution comprises: 1, 4-butanediol and human glycidyl methacrylate, wherein the mass ratio of the 1, 4-butanediol to the human glycidyl methacrylate is 45: 1;
s2, heating the second solution to 73 ℃, and mixing the mixture and the second solution in a reactor;
s3, reacting the mixture and the second solution in a reactor to obtain an oligomer;
s4, uniformly mixing the oligomer and the HDI chain extender at 180 ℃, and granulating to obtain copolyester;
s5, uniformly mixing the antioxidant 168, the silicon dioxide, the UV-531 and the copolyester, and blowing out to obtain the biodegradable agricultural mulching film.
3. The process for producing a biodegradable agricultural mulching film according to claim 2, wherein step S1 comprises the steps of:
s11, putting dry materials into a dry material weighing container on the reactor, and putting the first solution into a wet material weighing container on the reactor;
s12, judging whether the ratio of the dry material mass in the dry material weighing container to the first solution mass in the wet material weighing container is a specified value, if so, performing a step S13, and if not, obtaining no mixture and operating again;
s13, starting a rotary driving device on the reactor, and driving the screw rod in the conveying cylinder to rotate by the rotary driving device;
s14, opening a second valve at the bottom of the wet material weighing container, and putting the first solution into the top of the conveying cylinder through a second conveying pipe;
s15, opening a first valve at the bottom of the dry material weighing container, putting the dry materials into the middle of a conveying cylinder through a first conveying pipe, enabling the rotating first solution to be in contact with the dry materials and mixed through a screw rod to obtain a mixture, and conveying the mixture into the reactor through the conveying cylinder.
4. The process for producing a biodegradable agricultural mulching film according to claim 3, wherein the time interval between the step S14 and the step S15 is 18 seconds to 22 seconds.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911393263.2A CN111087771A (en) | 2019-12-30 | 2019-12-30 | Biodegradable agricultural mulching film and production process thereof |
| CN202111422314.7A CN113956450A (en) | 2019-12-30 | 2019-12-30 | Production process of biodegradable agricultural mulching film |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911393263.2A CN111087771A (en) | 2019-12-30 | 2019-12-30 | Biodegradable agricultural mulching film and production process thereof |
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| CN202111422314.7A Division CN113956450A (en) | 2019-12-30 | 2019-12-30 | Production process of biodegradable agricultural mulching film |
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| CN111087771A true CN111087771A (en) | 2020-05-01 |
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| CN202111422314.7A Pending CN113956450A (en) | 2019-12-30 | 2019-12-30 | Production process of biodegradable agricultural mulching film |
| CN201911393263.2A Pending CN111087771A (en) | 2019-12-30 | 2019-12-30 | Biodegradable agricultural mulching film and production process thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040089973A1 (en) * | 2001-03-22 | 2004-05-13 | Manh Hoang | Liquid phase reactor |
| CN102702694A (en) * | 2012-06-14 | 2012-10-03 | 新疆康润洁环保科技有限公司 | Polyester biodegradation agricultural mulching film as well as preparation and application of polyester biodegradation agricultural mulching film |
| CN105620952A (en) * | 2015-12-21 | 2016-06-01 | 珠海优特电力科技股份有限公司 | Feeding device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002240707B2 (en) * | 2001-03-22 | 2005-12-15 | Srl Performance Limited | Liquid phase reactor |
| CN101717493B (en) * | 2009-11-09 | 2012-12-26 | 浙江杭州鑫富药业股份有限公司 | Aliphatic-aromatic copolyester, preparation method and application thereof |
| US9056979B2 (en) * | 2012-11-15 | 2015-06-16 | Basf Se | Biodegradable polyester mixture |
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2019
- 2019-12-30 CN CN202111422314.7A patent/CN113956450A/en active Pending
- 2019-12-30 CN CN201911393263.2A patent/CN111087771A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040089973A1 (en) * | 2001-03-22 | 2004-05-13 | Manh Hoang | Liquid phase reactor |
| CN102702694A (en) * | 2012-06-14 | 2012-10-03 | 新疆康润洁环保科技有限公司 | Polyester biodegradation agricultural mulching film as well as preparation and application of polyester biodegradation agricultural mulching film |
| CN105620952A (en) * | 2015-12-21 | 2016-06-01 | 珠海优特电力科技股份有限公司 | Feeding device |
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