CN113105686A - Special shed film for flowers and preparation method thereof - Google Patents
Special shed film for flowers and preparation method thereof Download PDFInfo
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- CN113105686A CN113105686A CN202110418321.3A CN202110418321A CN113105686A CN 113105686 A CN113105686 A CN 113105686A CN 202110418321 A CN202110418321 A CN 202110418321A CN 113105686 A CN113105686 A CN 113105686A
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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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
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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
-
- 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
- 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
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
-
- 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
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/005—Stabilisers against oxidation, heat, light, ozone
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Greenhouses (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Abstract
The invention relates to a special greenhouse film for flowers and a preparation method thereof, belonging to the technical field of agricultural films, wherein the special greenhouse film for flowers comprises the following raw materials in percentage by weight: 20-30% of low-density polyethylene, 50-60% of linear polyethylene, 10-20% of metallocene polyethylene and 10-15% of functional master batch, wherein the functional master batch comprises the following raw materials in percentage by weight: 60-75% of LD carrier, 1-2% of antioxidant, 8-10% of hindered amine light stabilizer, 10-20% of ultraviolet absorbent, 2-5% of heat preservation agent and 5-6% of dispersant. According to the invention, on the basis of polyethylene materials, functional master batch is added, and the prepared greenhouse film has the advantages of increased ultraviolet ray blocking strength, high tensile strength, good aging resistance, outstanding heat preservation effect and long service life through reasonable proportioning of the antioxidant, the hindered amine light stabilizer and the ultraviolet ray absorbent; the greenhouse film blocks most ultraviolet rays, effectively prevents the blackening problem of red rose petals and the flooding of pests with visible areas in ultraviolet wave bands, improves the yield of crops, and reduces the pollution caused by pesticides.
Description
Technical Field
The invention belongs to the technical field of agricultural films, and particularly relates to a special greenhouse film for flowers and a preparation method thereof.
Background
The greenhouse film is widely used in agricultural planting, has good light transmittance and high transparency, can promote plant photosynthesis, and has the effects of increasing yield and income. Yunnan province is a flower planting province, the development of the flower industry is rapid, the Yunnan province is located in a high-altitude area with the height of 1500 plus 2500 meters, the atmosphere is thin, the ultraviolet ray is strong, the ultraviolet ray intensity with the wavelength of 280 plus 315nm is a key factor for blackening flower petals, particularly the Yunnan province is obviously reflected in the flower planting, the ultraviolet ray is also a necessary condition for the growth of viruses and winged aphids, the ultraviolet ray is cut off or weakened, the pest and disease damage of the flowers are controlled by utilizing a biological means, the blocking effect of the existing flower film on the ultraviolet ray is not obvious, and the pest and disease damage is controlled by pesticides, so that a special greenhouse film for the flowers is necessary to be provided.
Disclosure of Invention
In order to overcome the problems in the background art, the invention provides a special greenhouse film for flowers and a preparation method thereof.
In order to realize the purpose, the invention is realized by the following technical scheme:
the special shed film for the flowers comprises the following raw materials in percentage by weight: 20-30% of low-density polyethylene, 50-60% of linear polyethylene, 10-20% of metallocene polyethylene and 10-15% of functional master batch.
The preparation of the functional master batch comprises the following raw materials in percentage by weight: 60-75% of LD carrier, 1-2% of antioxidant, 8-10% of hindered amine light stabilizer, 10-20% of ultraviolet absorbent, 2-5% of heat preservation agent and 5-6% of dispersant.
Wherein the ultraviolet absorbent is one of benzophenone, benzotriazole and triazine compounds.
The preparation method of the functional master batch comprises the following steps: the raw materials are proportioned according to the formula, mixed in a high-speed mixer for 1min and then mixed at low speed for 3min, and the mixture is extruded by a double-screw extruder, subjected to water-cooling bracing, drying, grain-sized dicing and other processes for granulation, wherein the extrusion temperature is 130-185 ℃.
A preparation method of a special shed film for flowers comprises the following specific steps:
1) mixing and feeding: mixing low-density polyethylene, linear polyethylene, metallocene polyethylene and functional master batch in proportion for 10-15 min;
2) extruding and plasticizing: sending the mixture to an extruder, and strictly controlling the extrusion temperature, wherein the extrusion temperature is 150 degrees in the first zone, 155 degrees in the second zone, 160 degrees in the third zone, 165 degrees in the fourth zone, 170 degrees in the fifth zone, 175 degrees in the sixth zone and 180 degrees in the seventh zone;
3) filtering and forming: filtering by three layers of 80, 100 and 120 meshes, wherein the temperature of a die is 180 ℃, and the blow-up ratio is 1: 2.7;
4) cooling, drawing and shaping: and (3) blowing, cooling and shaping the film blank at 180 ℃ to form a film bubble at 65 ℃, cooling the film bubble to below 45 ℃ through a traction roller, and finally rolling to obtain a finished product.
The invention has the beneficial effects that:
(1) the functional master batch is added on the basis of the polyethylene material, and the prepared greenhouse film has the advantages of increased ultraviolet ray blocking strength, high tensile strength, good aging resistance, good heat insulation performance and good insect prevention performance through the reasonable proportion of the antioxidant, the hindered amine light stabilizer and the ultraviolet ray absorbent.
(2) The greenhouse film provided by the invention blocks partial ultraviolet rays, effectively prevents the blackening problem of red rose petals and the flooding of pests with visible areas in the ultraviolet wave band, improves the yield of crops, and reduces the pollution caused by medication.
(3) The ultraviolet ray intensity is different due to different altitudes, the influence on the color of the flowers is larger, the higher the altitude is, the stronger the ultraviolet ray is, and the darker the color of the flowers is, and the greenhouse film can be suitable for planting the flowers at different altitudes.
Detailed Description
Example 1
The special shed film for the flowers comprises the following raw materials in percentage by weight: 20% of low-density polyethylene, 50% of linear polyethylene, 20% of metallocene polyethylene and 10% of functional master batch. The greenhouse film is suitable for the area with the altitude of about 1500 m.
The functional master batch comprises the following raw materials in percentage by weight: 72% of LD carrier, 1% of antioxidant, 8% of hindered amine light stabilizer, 10% of ultraviolet absorber (benzophenone), 3% of heat preservation agent and 6% of dispersing agent.
The preparation method of the functional master batch comprises the following steps: the raw materials are proportioned according to the formula, mixed in a high-speed mixer for 1min and then mixed at low speed for 3min, the mixture is added into a hopper of a double-screw extruder, and granulation is carried out through the processes of extrusion, water-cooling bracing, drying and grain-sized dicing, wherein the extrusion temperature is 130-185 ℃.
A preparation method of a special shed film for flowers comprises the following specific steps:
1) mixing and feeding: mixing low-density polyethylene, linear polyethylene, metallocene polyethylene and functional master batch in proportion for 10-15 min;
2) extruding and plasticizing: sending the mixture to an extruder, and strictly controlling the extrusion temperature, wherein the extrusion temperature is 150 degrees in the first zone, 155 degrees in the second zone, 160 degrees in the third zone, 165 degrees in the fourth zone, 170 degrees in the fifth zone, 175 degrees in the sixth zone and 180 degrees in the seventh zone;
3) filtering and forming: filtering by three layers of 80, 100 and 120 meshes, wherein the temperature of a die is 180 ℃, and the blow-up ratio is 1: 2.7;
4) cooling, drawing and shaping: and (3) blowing, cooling and shaping the film blank at 180 ℃ to form a film bubble at 65 ℃, cooling the film bubble to below 45 ℃ through a traction roller, and finally rolling to obtain a finished product. The greenhouse film is suitable for the area with the altitude higher than 1500 m.
Example 2
The special shed film for the flowers comprises the following raw materials in percentage by weight: 20% of low-density polyethylene, 40% of linear polyethylene, 30% of metallocene polyethylene and 10% of functional master batch.
The functional master batch comprises the following raw materials in percentage by weight: 72% of LD carrier, 1% of antioxidant, 8% of hindered amine light stabilizer, 10% of ultraviolet absorber (benzotriazole), 3% of heat preservation agent and 6% of dispersing agent.
The preparation method of the functional master batch and the preparation method of the special shed film for flowers are the same as the example 1. The greenhouse film is suitable for the area with the altitude of about 2000 m.
Example 3
The special shed film for the flowers comprises the following raw materials in percentage by weight: 20% of low-density polyethylene, 30% of linear polyethylene, 40% of metallocene polyethylene and 10% of functional master batch.
The functional master batch comprises the following raw materials in percentage by weight: 62% of LD carrier, 1% of antioxidant, 8% of hindered amine light stabilizer, 20% of ultraviolet absorber (triazine), 3% of dripping agent and 6% of dispersing agent.
The preparation method of the functional master batch and the preparation method of the special shed film for flowers are the same as the example 1. The greenhouse film is suitable for the area with the altitude of about 2500 m.
The physical properties of the films obtained in examples 1-3 were measured according to GB/T13022-1991 and QB/T1130-1991, and the results are shown in Table 1.
Table 1 table of physical property testing data of each group of products
The optical properties of the films obtained in examples 1 to 3 were measured according to GB/T2410-1980 and GB/T17032-1997, and the results are shown in Table 2.
Table 2 optical property detection data table for each group of products
Analysis of experiments
The greenhouse film special for flowers and the conventional greenhouse film prepared by the invention are adopted to carry out a rose planting greenhouse buckling test, the greenhouse film of the embodiment 1 is adopted to carry out an application test in an area with an altitude of 1500 m, the greenhouse film of the embodiment 2 is adopted to carry out an application test in an area with an altitude of 2000 m, the greenhouse film of the embodiment 3 is adopted to carry out an application test in an area with an altitude of 2500 m, and the three experimental areas are provided with control groups of the conventional greenhouse film. The test results show that: the effect of the test groups in the three altitude areas is more prominent than that of the control group, the blackening condition of the rose petals is greatly reduced, and the rose is bright and vivid in color.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (5)
1. The utility model provides a special canopy membrane of flowers which characterized in that: the special shed film for flowers comprises the following raw materials in percentage by weight: 20-30% of low-density polyethylene, 50-60% of linear polyethylene, 10-20% of metallocene polyethylene and 10-15% of functional master batch.
2. A flower-dedicated shed film as defined in claim 1, wherein: the functional master batch comprises the following raw materials in percentage by weight: 60-75% of LD carrier, 1-2% of antioxidant, 8-10% of hindered amine light stabilizer, 10-20% of ultraviolet absorbent, 2-5% of heat preservation agent and 5-6% of dispersant.
3. A flower-dedicated shed film as defined in claim 2, wherein: the ultraviolet absorbent is one of benzophenone, benzotriazole and triazine compounds.
4. A flower-dedicated shed film as defined in claim 2, wherein: the preparation method of the functional master batch comprises the following steps: the raw materials are proportioned according to the formula, mixed in a high-speed mixer for 1min and then mixed at low speed for 3min, the mixture is added into a hopper of a double-screw extruder, and granulation is carried out through the processes of extrusion, water-cooling bracing, drying and grain-sized dicing, wherein the extrusion temperature is 130-185 ℃.
5. The preparation method of the special shed film for flowers as claimed in claim 4, which is characterized in that: the method comprises the following specific steps:
1) mixing and feeding: mixing low-density polyethylene, linear polyethylene, metallocene polyethylene and functional master batch in proportion for 10-15 min;
2) extruding and plasticizing: sending the mixture to an extruder, and strictly controlling the extrusion temperature, wherein the extrusion temperature is 150 degrees in the first zone, 155 degrees in the second zone, 160 degrees in the third zone, 165 degrees in the fourth zone, 170 degrees in the fifth zone, 175 degrees in the sixth zone and 180 degrees in the seventh zone;
3) filtering and forming: filtering by three layers of 80, 100 and 120 meshes, wherein the temperature of a die is 180 ℃, and the blow-up ratio is 1: 2.7;
4) cooling, drawing and shaping: and (3) blowing, cooling and shaping the film blank at 180 ℃ to form a film bubble at 65 ℃, cooling the film bubble to below 45 ℃ through a traction roller, and finally rolling to obtain a finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110418321.3A CN113105686A (en) | 2021-04-19 | 2021-04-19 | Special shed film for flowers and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110418321.3A CN113105686A (en) | 2021-04-19 | 2021-04-19 | Special shed film for flowers and preparation method thereof |
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| Publication Number | Publication Date |
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| CN113105686A true CN113105686A (en) | 2021-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202110418321.3A Pending CN113105686A (en) | 2021-04-19 | 2021-04-19 | Special shed film for flowers and preparation method thereof |
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| Country | Link |
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| CN (1) | CN113105686A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114350047A (en) * | 2021-12-31 | 2022-04-15 | 广东汇发塑业科技有限公司 | High-performance greenhouse film special for watermelons and Hami melons in Yueqiong areas |
| CN114619739A (en) * | 2022-03-11 | 2022-06-14 | 揭阳市千田塑胶有限公司 | Rainproof reflective film for truck and preparation method thereof |
| CN116082739A (en) * | 2023-04-10 | 2023-05-09 | 常州凯得新材料科技有限公司 | Polyethylene temperature difference film with high light transmittance and preparation method thereof |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080249211A1 (en) * | 2007-04-04 | 2008-10-09 | Smink Jeffrey S | Masterbatch composition |
| CN102432945A (en) * | 2011-10-28 | 2012-05-02 | 甘肃福雨塑业有限责任公司 | Dry farming anti-aging long-acting autumn mulching film, and preparation process thereof |
| CN102660074A (en) * | 2012-05-18 | 2012-09-12 | 天水天宝塑业有限责任公司 | Special weather-resisting functional mulching film capable of being used for two years |
| CN102924799A (en) * | 2011-08-10 | 2013-02-13 | 中国石油天然气股份有限公司 | Metallocene polyethylene resin composition for weathering resistance agriculture film, and preparation method thereof |
| CN104004266A (en) * | 2014-06-18 | 2014-08-27 | 甘肃宏鑫农业科技有限公司 | Black weeding mulching film special for potatoes |
| CN104017268A (en) * | 2014-06-18 | 2014-09-03 | 甘肃宏鑫农业科技有限公司 | Aging-resistant long-life mulching film for dry land crops |
| CN105330954A (en) * | 2015-12-14 | 2016-02-17 | 民勤县邦德贸易有限公司 | Weather-proof resin master batch for agricultural plastic mulching film synthesis and preparation method |
| CN105367887A (en) * | 2015-12-08 | 2016-03-02 | 山东棉花研究中心 | Environment-friendly mulching film easy for recycling and preparation method thereof |
| CN105419041A (en) * | 2014-09-05 | 2016-03-23 | 青岛颐世保塑料有限公司 | Polyethylene weathering-resistant color master batch material |
| KR20180047139A (en) * | 2016-10-31 | 2018-05-10 | (주)유니온화학 | Fabricated Film For Agiculture Using High―Tenacity Polyethylene Flat―Yarn |
| CN109749212A (en) * | 2017-11-03 | 2019-05-14 | 中国石油天然气股份有限公司 | A kind of mulch and preparation method thereof |
| CN110962418A (en) * | 2019-11-21 | 2020-04-07 | 徐蕾 | Yield-increasing and high-permeability film, multilayer yield-increasing and high-permeability film and preparation method thereof |
-
2021
- 2021-04-19 CN CN202110418321.3A patent/CN113105686A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080249211A1 (en) * | 2007-04-04 | 2008-10-09 | Smink Jeffrey S | Masterbatch composition |
| CN102924799A (en) * | 2011-08-10 | 2013-02-13 | 中国石油天然气股份有限公司 | Metallocene polyethylene resin composition for weathering resistance agriculture film, and preparation method thereof |
| CN102432945A (en) * | 2011-10-28 | 2012-05-02 | 甘肃福雨塑业有限责任公司 | Dry farming anti-aging long-acting autumn mulching film, and preparation process thereof |
| CN102660074A (en) * | 2012-05-18 | 2012-09-12 | 天水天宝塑业有限责任公司 | Special weather-resisting functional mulching film capable of being used for two years |
| CN104004266A (en) * | 2014-06-18 | 2014-08-27 | 甘肃宏鑫农业科技有限公司 | Black weeding mulching film special for potatoes |
| CN104017268A (en) * | 2014-06-18 | 2014-09-03 | 甘肃宏鑫农业科技有限公司 | Aging-resistant long-life mulching film for dry land crops |
| CN105419041A (en) * | 2014-09-05 | 2016-03-23 | 青岛颐世保塑料有限公司 | Polyethylene weathering-resistant color master batch material |
| CN105367887A (en) * | 2015-12-08 | 2016-03-02 | 山东棉花研究中心 | Environment-friendly mulching film easy for recycling and preparation method thereof |
| CN105330954A (en) * | 2015-12-14 | 2016-02-17 | 民勤县邦德贸易有限公司 | Weather-proof resin master batch for agricultural plastic mulching film synthesis and preparation method |
| KR20180047139A (en) * | 2016-10-31 | 2018-05-10 | (주)유니온화학 | Fabricated Film For Agiculture Using High―Tenacity Polyethylene Flat―Yarn |
| CN109749212A (en) * | 2017-11-03 | 2019-05-14 | 中国石油天然气股份有限公司 | A kind of mulch and preparation method thereof |
| CN110962418A (en) * | 2019-11-21 | 2020-04-07 | 徐蕾 | Yield-increasing and high-permeability film, multilayer yield-increasing and high-permeability film and preparation method thereof |
Non-Patent Citations (7)
| Title |
|---|
| NORMAN S.ALLEN等: "Effect of Polymerization Catalyst Technology on the Melt Processing Stability of Polyethylenes, Part 3: Additives Blends Performance", 《JOURNAL OF VINYL & ADDITIVE TECHNOLOGY》 * |
| 卢伟: "聚乙烯的老化与防老化研究进展", 《塑料助剂》 * |
| 张牙润等: "高透光散光功能棚膜的开发", 《研究与开发》 * |
| 赵英主编: "《农用塑料制品与加工》", 31 March 2003, 科学技术文献出版社 * |
| 连钦: "茂金属聚乙烯棚膜的开发与农田应用研究", 《甘肃科技》 * |
| 陈宇等: "聚烯烃新型高效光稳定剂6911在农用棚膜中的应用研究", 《中国塑料》 * |
| 隋昭德等编著: "《光稳定剂及其应用技术》", 31 January 2010, 中国轻工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114350047A (en) * | 2021-12-31 | 2022-04-15 | 广东汇发塑业科技有限公司 | High-performance greenhouse film special for watermelons and Hami melons in Yueqiong areas |
| CN114619739A (en) * | 2022-03-11 | 2022-06-14 | 揭阳市千田塑胶有限公司 | Rainproof reflective film for truck and preparation method thereof |
| CN114619739B (en) * | 2022-03-11 | 2023-12-19 | 揭阳市千田塑胶有限公司 | Rainproof reflective film for trucks and preparation method thereof |
| CN116082739A (en) * | 2023-04-10 | 2023-05-09 | 常州凯得新材料科技有限公司 | Polyethylene temperature difference film with high light transmittance and preparation method thereof |
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Application publication date: 20210713 |