CN110741855A - Environment-friendly high-strength weather-resistant yellow-black double-color mulching film and preparation method thereof - Google Patents
Environment-friendly high-strength weather-resistant yellow-black double-color mulching film and preparation method thereof Download PDFInfo
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- CN110741855A CN110741855A CN201910876930.6A CN201910876930A CN110741855A CN 110741855 A CN110741855 A CN 110741855A CN 201910876930 A CN201910876930 A CN 201910876930A CN 110741855 A CN110741855 A CN 110741855A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
- A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
- A01G13/0256—Ground coverings
- A01G13/0268—Mats or sheets, e.g. nets or fabrics
- A01G13/0275—Films
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- 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
- 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
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
-
- 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
- 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
- B32B2250/03—3 layers
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- 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
- B32B2307/41—Opaque
-
- 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
- B32B2307/54—Yield strength; Tensile strength
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of agricultural plastic products, and aims to provide an environment-friendly high-strength weather-resistant yellow-black double-color mulching film and a preparation method thereof, wherein the yellow-black double-color mulching film is of a three-layer composite structure and comprises an inner layer, a middle layer and an outer layer; the preparation raw materials of the inner layer mainly comprise low-density polyethylene, linear low-density polyethylene, black master batch and long-life master batch; the preparation raw materials of the middle layer mainly comprise metallocene polyethylene, linear low-density polyethylene, yellow master batch and long-life master batch; the outer layer is prepared from the following raw materials mainly including low-density polyethylene, linear low-density polyethylene, yellow master batch and long-life master batch, and has the beneficial effects that: the yellow-black double-color mulching film is a high-tech environment-friendly agricultural mulching film product specially designed for green pollution-free planting of vegetables, melons and fruits and field crops, takes metallocene as a main material, adopts advanced three-layer co-extrusion equipment, and has the functions of high strength, super long service life, weeding, insect prevention and the like.
Description
Technical Field
The invention relates to the technical field of agricultural plastic products, in particular to an environment-friendly high-strength weather-resistant yellow-black double-color mulching film and a preparation method thereof.
Background
The mulching film, i.e., a ground covering film, is used for ground covering to increase the temperature of soil, maintain the moisture of the soil, maintain the structure of the soil, prevent pests from attacking crops and diseases caused by certain microorganisms, and the like, and promote the growth of plants. The plastic mulching film is developed and applied to ground coverage for planting crops for years, the technology is indispensable in agricultural production, but for years, because the structure of the mulching film is unreasonable, if the thickness is too thin, the film is further longitudinally drawn under the mechanical action during film laying and sowing, so that the film is thinner, and the physical strength is insufficient. In addition, currently, mulching films have been developed from common mulching films to various single-color mulching films (such as black mulching films, white mulching films, and single-color mulching films), black-and-white alternative mulching films, and composite mulching films (such as silver-gray black composite mulching films). The black mulching film has low light transmittance and heat is not easily transferred to soil, so that the performance of preventing soil moisture evaporation is relatively strong, the growth of weeds can be obviously inhibited, but the soil temperature is low, the growth of crops is not facilitated, and the conditions of late maturity, yield reduction and the like of the crops are caused; meanwhile, the black heat absorption effect is obvious, the mulching film is easy to age quickly due to heat absorption, the film rotting phenomenon occurs in advance, the service life of the film is seriously influenced, the rotted film is not easy to clear from the field, and the soil is polluted and the crop yield is also influenced. The white mulching film and other single-color transparent mulching films have good light transmittance, so that the soil is good in temperature-increasing and moisture-preserving effect after being covered with the white mulching film, and the temperature of a soil plough layer can be generally increased by 2-4 ℃; however, during the application process, weeds under the film also flourish, and further compete for water and fertilizer with crops to influence the yield. The black-white mulching film is a mulching film with black two sides and white middle, and the black mulching film on the two sides has the defects that the film is rotten in advance due to heat absorption and aging, soil is polluted, and crop yield is influenced. In the silver-gray black composite mulching film, when the light reflection effect of the silver-gray mulching film layer is not strong or obvious, the phenomena that the mulching film is easy to age quickly due to heat absorption, the film is broken in advance and the like can also occur. In addition, the quality of the mulching film is generally poor, if the service life is short, the effective service life of the mulching film is short during the production of the mulching film, the 'mission' of planting crops on the ground by covering the mulching film is not finished, and the original physicochemical property of the mulching film is lost or the retention rate of the physicochemical property of the original material is low. Due to the factors, the common mulching film used at present has poor wind damage resistance in use, much soil covering on the film surface of the seedbed, relatively small lighting surface, and difficult recovery of the mulching film, so that serious farmland residual film pollution is caused, the agricultural ecological environment is greatly damaged, and the agricultural production is influenced. In conclusion, the environment-friendly mulching film which has the advantages of warming and moisturizing, inhibiting weed growth, being beneficial to the benign growth of crops, maturing in advance, improving the yield, resisting aging, being long in service life, being colorless and pollution-free has very important significance.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an environment-friendly high-strength weather-resistant yellow-black double-color mulching film and a preparation method thereof, which are high-tech environment-friendly agricultural mulching film products specially designed for green pollution-free and pollution-free vegetable, melon and fruit planting and field crops. The mulching film has high strength, long service life, and functions of weeding, preventing insect, etc.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides an environment-friendly high strength weatherability yellow-black double-colored plastic film which characterized in that: the environment-friendly high-strength weather-resistant yellow-black double-color mulching film is a three-layer composite structure prepared by a co-extrusion blow molding shed film machine set and comprises an inner layer, a middle layer and an outer layer;
the inner layer is prepared from raw materials which mainly comprise, by weight, 5-11 parts of low-density polyethylene (LDPE), 80-87 parts of linear low-density polyethylene (LLDPE), 2-5 parts of black master batch and 3-7 parts of long-life master batch;
the preparation raw materials of the middle layer are counted by weight and mainly comprise 45-55 parts of metallocene polyethylene (MLLDPE), 38-45 parts of Linear Low Density Polyethylene (LLDPE), 2-5 parts of yellow master batch and 3-7 parts of long-life master batch;
the preparation raw materials of the outer layer mainly comprise, by weight, 5-11 parts of Low Density Polyethylene (LDPE), 80-87 parts of Linear Low Density Polyethylene (LLDPE), 2-5 parts of yellow master batch and 3-7 parts of long-life master batch.
The mass ratio of the inner layer to the middle layer to the outer layer is 1:1: 1.
The thickness ratio of the inner layer, the middle layer and the outer layer is 1:1: 1.
The long-life master batch is added with a light stabilizer, and the content of the light stabilizer in the film is 5-6 per mill.
The preparation method of the environment-friendly high-strength weather-resistant yellow-black double-color mulching film comprises the following steps:
step 1: fully mixing the preparation raw materials corresponding to the three-layer composite structure in a stirring container with a dehumidifying and drying function according to a process proportion, and stirring for 15min at the temperature of 60 ℃;
step 2: respectively putting the polyethylene materials uniformly stirred in the step 1 into three main machine hoppers of an inner layer, a middle layer and an outer layer corresponding to the co-extrusion blow molding shed film machine set;
and step 3: continuously feeding raw materials in three main machine hoppers into an extruder, melting and extruding the raw materials into a composite die head with an outer layer spiral flow channel, a middle layer spiral flow channel and an inner layer spiral flow channel, wherein the molten raw materials flow out according to respective spiral and converge at a die opening to form a three-layer composite pipe blank, wherein the heating temperature of a machine body is set to be 140-200 ℃, and the heating temperature of a machine head is set to be 180-220 ℃;
and 4, step 4: and blowing the stretched pipe blank to a required size by a fan, and then cooling, shaping and post-treating to obtain the pipe blank.
Compared with the prior art, the invention has the beneficial effects that:
1) the continuous service life of the mulching film with the thickness of 0.016mm is more than 36 months, the service life of the mulching film is prolonged by 3 times compared with that of the similar products, and the mulching film is convenient to recycle after being used.
2) The product takes metallocene as a main material, has good tensile property and wind resistance, and the tensile load is improved by 50 percent compared with the common mulching film.
3) The product has light transmittance of not more than 10% and high light-blocking rate, and can prevent growth of germinated weed by physical weeding method.
4) The product has effects of preventing insect, effectively reducing virus and population density of insect which damage crops, reducing pesticide usage amount, and not causing pesticide residue and drug resistance of insect, and can be used for preventing and treating small insects such as adult fly, whitefly, aphid, leafhopper, thrips, etc., and can kill adult insects of various insects by matching with sex attractant.
Detailed Description
The technical scheme of the invention is further explained by combining the specific embodiment as follows:
example 1:
the invention relates to an environment-friendly high-strength weather-resistant yellow-black double-color mulching film which is a three-layer composite structure prepared by a co-extrusion blow molding shed film machine set and comprises an inner layer, a middle layer and an outer layer;
the three-layer processing scheme of the environment-friendly high-strength weather-resistant yellow-black double-color mulching film is as follows:
the inner layer is prepared from raw materials which mainly comprise, by weight, 5-11 parts of low-density polyethylene (LDPE), 80-87 parts of linear low-density polyethylene (LLDPE), 2-5 parts of black master batch and 3-7 parts of long-life master batch;
the preparation raw materials of the middle layer are counted by weight and mainly comprise 45-55 parts of metallocene polyethylene (MLLDPE), 38-45 parts of Linear Low Density Polyethylene (LLDPE), 2-5 parts of yellow master batch and 3-7 parts of long-life master batch;
the preparation raw materials of the outer layer mainly comprise, by weight, 5-11 parts of Low Density Polyethylene (LDPE), 80-87 parts of Linear Low Density Polyethylene (LLDPE), 2-5 parts of yellow master batch and 3-7 parts of long-life master batch.
The mass ratio of the inner layer to the middle layer to the outer layer is 1:1: 1.
The longevity master batch is added with a light stabilizer, the content of the light stabilizer in the film is 5-6 per mill, the light stabilizer is selected from a Tiangang high-efficiency light stabilizer HS-362, and the addition amount of the master batch is recalculated according to the concentration of the purchased master batch auxiliary agent.
The metallocene polyethylene (MLLDPE) may also be selected from 1018FA available from Exxon, USA.
The 1.0 linear melt index can be imported or made 1001XV, 1801, 118N, 7047 and the like.
It is worth noting that in this embodiment, if the yellow color of the mulching film is not enough, the amount of the outer yellow masterbatch can be increased, and the scheme is characterized in that: high strength, long service life, weeding and preventing diseases and pests, and the annual usage amount of the formula can be 100 tons.
The processing technology of the environment-friendly high-strength weather-resistant yellow-black double-color mulching film in the implementation comprises the following steps:
1. setting a process level:
the thickness ratio of the inner layer, the middle layer and the outer layer is 1:1: 1.
For example, 10 tons of product are produced, the outer layer needs 3.33 tons, the middle layer needs 3.33 tons, and the inner layer needs 3.33 tons; the outer layer and the middle layer are yellow, the inner layer is black, and the outer layer of the blown film is actually laid, namely the yellow faces outwards; the outer layer to be laid is printed or ink-jetted to prevent processing errors.
2. The process temperature settings are as follows:
the preparation method of the environment-friendly high-strength weather-resistant yellow-black double-color mulching film comprises the following steps:
step 1: fully mixing the preparation raw materials corresponding to the three-layer composite structure in a stirring container with a dehumidifying and drying function according to a process proportion, and stirring for 15min at the temperature of 60 ℃;
step 2: respectively putting the polyethylene materials uniformly stirred in the step 1 into three main machine hoppers of an inner layer, a middle layer and an outer layer corresponding to the co-extrusion blow molding shed film machine set;
and step 3: continuously feeding raw materials in three main machine hoppers into an extruder, melting and extruding the raw materials into a composite die head with an outer layer spiral flow channel, a middle layer spiral flow channel and an inner layer spiral flow channel, wherein the molten raw materials flow out according to respective spiral and converge at a die opening to form a three-layer composite pipe blank, wherein the heating temperature of a machine body is set to be 140-200 ℃, and the heating temperature of a machine head is set to be 180-220 ℃; it is worth noting that the set temperature is properly increased in winter;
and 4, step 4: and blowing the stretched pipe blank to a required size by a fan, and then cooling, shaping and post-treating to obtain the pipe blank.
Example 2:
the invention relates to an environment-friendly high-strength weather-resistant yellow-black double-color mulching film which is a two-layer composite structure prepared by a co-extrusion blow molding shed film machine set and comprises an inner layer and an outer layer;
the two-layer processing scheme of the environment-friendly high-strength weather-resistant yellow-black double-color mulching film is as follows:
the metallocene polyethylene (MLLDPE) may also be selected from 1018FA available from Exxon, USA.
The 1.0 linear melt index can be imported or made 1001XV, 1801, 118N, 7047 and the like.
The longevity master batch is added with a light stabilizer, the content of the light stabilizer in the film is 5-6 per mill, the light stabilizer is selected from a Tiangang high-efficiency light stabilizer HS-362, and the addition amount of the master batch is recalculated according to the concentration of the purchased master batch auxiliary agent.
It is worth noting that in this embodiment, if the yellow color of the mulching film is not enough, the amount of the outer yellow masterbatch can be increased, and meanwhile, the preferable scheme of the product is a three-layer co-extrusion scheme, and a two-layer scheme can be adopted under special conditions, and the scheme is characterized in that: high strength, long service life, weeding and preventing plant diseases and insect pests, and the annual usage amount of the formula can be 50 tons.
When the invention is actually used, the following points need to be noticed:
① the color of the product is yellow upward and black downward, and if the product is laid reversely, the effect will be affected.
② should be protected from abrasion, sharp objects, punctures and scratches during transportation and use.
③ when it is spread, it can be spread mechanically or manually, and it should be stretched smoothly and tensed.
④ drip irrigation facility can be used under mulch for watering and fertilizing under mulch.
⑤ technical index and requirements implement national standards (GB 13735-2017).
⑥ the shelf life is no more than 18 months from the date of manufacture.
⑦ the product should be stored in a cool and dry place far away from heat source, and should not be exposed to sunlight and rain.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. The utility model provides an environment-friendly high strength weatherability yellow-black double-colored plastic film which characterized in that: the environment-friendly high-strength weather-resistant yellow-black double-color mulching film is a three-layer composite structure prepared by a co-extrusion blow molding shed film machine set and comprises an inner layer, a middle layer and an outer layer;
the inner layer is prepared from raw materials which mainly comprise, by weight, 5-11 parts of low-density polyethylene (LDPE), 80-87 parts of linear low-density polyethylene (LLDPE), 2-5 parts of black master batch and 3-7 parts of long-life master batch;
the preparation raw materials of the middle layer are counted by weight and mainly comprise 45-55 parts of metallocene polyethylene (MLLDPE), 38-45 parts of Linear Low Density Polyethylene (LLDPE), 2-5 parts of yellow master batch and 3-7 parts of long-life master batch;
the preparation raw materials of the outer layer mainly comprise, by weight, 5-11 parts of Low Density Polyethylene (LDPE), 80-87 parts of Linear Low Density Polyethylene (LLDPE), 2-5 parts of yellow master batch and 3-7 parts of long-life master batch.
2. The environment-friendly high-strength weather-resistant yellow-black double-color mulching film according to claim 1, characterized in that: the mass ratio of the inner layer to the middle layer to the outer layer is 1:1: 1.
3. The environment-friendly high-strength weather-resistant yellow-black double-color mulching film according to claim 1, characterized in that: the thickness ratio of the inner layer, the middle layer and the outer layer is 1:1: 1.
4. The environment-friendly high-strength weather-resistant yellow-black double-color mulching film according to claim 1, characterized in that: the long-life master batch is added with a light stabilizer, and the content of the light stabilizer in the film is 5-6 per mill.
5. The environment-friendly high-strength weather-resistant yellow-black two-color mulching film according to any one of claims 1 to 4, wherein: the preparation method of the environment-friendly high-strength weather-resistant yellow-black double-color mulching film comprises the following steps:
step 1: fully mixing the preparation raw materials corresponding to the three-layer composite structure in a stirring container with a dehumidifying and drying function according to a process proportion, and stirring for 15min at the temperature of 60 ℃;
step 2: respectively putting the polyethylene materials uniformly stirred in the step 1 into three main machine hoppers of an inner layer, a middle layer and an outer layer corresponding to the co-extrusion blow molding shed film machine set;
and step 3: continuously feeding raw materials in three main machine hoppers into an extruder, melting and extruding the raw materials into a composite die head with an outer layer spiral flow channel, a middle layer spiral flow channel and an inner layer spiral flow channel, wherein the molten raw materials flow out according to respective spiral and converge at a die opening to form a three-layer composite pipe blank, wherein the heating temperature of a machine body is set to be 140-200 ℃, and the heating temperature of a machine head is set to be 180-220 ℃;
and 4, step 4: and blowing the stretched pipe blank to a required size by a fan, and then cooling, shaping and post-treating to obtain the pipe blank.
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Cited By (1)
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| CN112544315A (en) * | 2020-12-08 | 2021-03-26 | 山东森博斯特塑胶科技有限公司 | Yellow-black mulching film and preparation method thereof |
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Application publication date: 20200204 |