CN112626716A - Manufacturing method of high-light-reflection-rate mulching film - Google Patents
Manufacturing method of high-light-reflection-rate mulching film Download PDFInfo
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- CN112626716A CN112626716A CN202011373151.3A CN202011373151A CN112626716A CN 112626716 A CN112626716 A CN 112626716A CN 202011373151 A CN202011373151 A CN 202011373151A CN 112626716 A CN112626716 A CN 112626716A
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/542—Adhesive fibres
- D04H1/544—Olefin series
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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
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
- D01F1/106—Radiation shielding agents, e.g. absorbing, reflecting agents
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/559—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving the fibres being within layered webs
Abstract
The invention relates to a method for preparing a mulching film with high light reflection rate, which is a double-sided mulching film consisting of two layers of non-woven fabrics, wherein the front side of the mulching film is a white non-woven fabric capable of reflecting light, the back side of the mulching film is a black non-woven fabric, each layer of non-woven fabric is prepared by mixing polypropylene matrix resin, an anti-aging auxiliary agent, titanium dioxide and pigment master batches, and is prepared by feeding, high-temperature melting, filtering, metering by a metering pump, spinning, cooling, up-and-down stretching, net curtain conveying and hot rolling, the non-woven fabrics of different layers are formed by successively drawing and polymerizing different lower stretchers in the conveying direction of the net curtain, and the drawing arrangement directions of the non-woven fabrics forming different layers are arranged in an; and finally, laminating and bonding the obtained non-woven fabrics of different layers together to form the agricultural mulching film. The mulching film manufactured by the invention not only improves the light reflection rate of the mulching film, but also has the advantages of tearing resistance, uniform thickness, improved usability and prolonged service life. The preparation process is simple, the production cost is reduced, and the method is suitable for industrial mass production.
Description
Technical Field
The invention relates to the technical field of agricultural production, in particular to an agricultural mulching film.
Background
Along with the rapid development of agriculture in China in recent years, the using amount of the agricultural mulching film is greatly increased, the requirement on the agricultural mulching film is gradually increased, various agricultural mulching films are available in the market, the agricultural mulching film has the functions of water and fertilizer retention, the temperature and the humidity of soil can be effectively controlled, a soil environment favorable for plant growth is created, the microporous structure of the agricultural mulching film can ventilate and seep water, the breathing of microorganisms in the soil is facilitated, more beneficial bacteria are generated, the nutrient content in the soil can be increased, but because some fruits are positioned in a backlight area or below a crown, sufficient sunlight cannot be received, the surface of the fruits is not uniformly colored, the sugar content and the nutrient content of the fruits are not high, the appearance and the taste of the fruits are seriously influenced, and the effect of the light-reflecting mulching film can be irradiated on the light-reflecting mulching film through the sunlight, the reflective mulching film reflects sunlight to fruits at different positions by utilizing the reflective effect of the reflective mulching film, so that the fruits can be guaranteed to carry out sufficient photosynthesis, the developmental maturity of the fruits cannot be influenced, a certain maturation period is shortened, pests such as aphids and the like can be repelled, the use amount of pesticides can be reduced to a certain extent, and part of labor cost is saved, the reflective rate of most of the currently used reflective mulching films is about 50%, the sunlight cannot be fully utilized, the quality and the taste of the fruits cannot be obviously improved, and the above effect cannot be achieved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the manufacturing method of the mulching film with high light reflection rate, the manufactured mulching film has obvious light reflection effect, and the usability and the service life of the manufactured mulching film are improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for preparing mulching film with high light reflection rate includes forming mulching film on two sides by two layers of non-woven fabric, setting white non-woven fabric on front side for reflecting light and black non-woven fabric on back side for each layer of non-woven fabric by following steps:
1) taking materials according to the weight ratio: 88 to 92 percent of polypropylene matrix resin, 2 to 5 percent of anti-aging additive, 2 to 6 percent of titanium dioxide and 2 to 5 percent of pigment master batch, wherein the titanium dioxide is cylindrical particles with the diameter of 2mm and the height of 4.5 mm;
2) after the raw materials are put into a plastic mixer for full mixing, the materials are pumped into a screw extruder by a vacuum suction machine to be melted into melt and extruded;
3) extruding and discharging the melt into a filter through a screw extruder, filtering out impurities, feeding the filtered melt into a gear metering pump, feeding the filtered melt into a spinning box through the gear metering pump, spinning the melt into filaments by a nozzle of the spinning box under the self gravity, cooling the filaments by air-conditioning cold air, and stretching the filaments to obtain primary spun fibers;
4) drawing the spun fiber by a lower stretcher, and then dropping the spun fiber on a net curtain to polymerize into a net to form a non-woven fabric; the outlet of the lower stretcher forms a row of drawn wires which fall on the net curtain, and the arrangement direction of the drawn wires and the conveying direction of the net curtain form a crossed relation;
the non-woven fabrics of different layers are formed by successively drawing and polymerizing different lower drawing devices in the conveying direction of the net curtain, and the drawing arrangement directions of the non-woven fabrics of different layers are intersected on a wire falling plane of the net curtain; and finally, laminating and bonding the obtained non-woven fabrics of different layers together to form the agricultural mulching film.
According to the scheme, the central position of the spinning box is provided with a feeding port, the feeding port is connected with a gear metering pump, a nozzle of the spinning box symmetrically extends in opposite directions from the center of the feeding port to obtain a longitudinal body, and the diameter of a spinning hole arranged on the nozzle is gradually widened from the center of the feeding port to two ends of the nozzle in the longitudinal direction.
The scheme is further that the melt is spun into filaments by a nozzle of a spinning box and then is stretched at the temperature of 128-130 ℃ and the stretching ratio of 180-220%; the temperature of cold air of the air conditioner is 18 ℃, and the wind power is 5.0-6.0 m/s.
The scheme is further that the conveying speed of the net curtain is 50m/min, the non-woven fabric layers of different layers are bonded together through a hot rolling method, and the temperature of an upper roller and a lower roller of the hot rolling is 160 ℃.
The invention achieves the following technical effects:
1. the mulching film is composed of two layers of non-woven fabrics, has the characteristics of the non-woven fabrics, improves the light reflection rate of the mulching film, is tear-resistant and uniform in thickness, improves the usability of the product and prolongs the service life of the product by means of innovative formula and matching process. The front side is a white film with high light reflection rate, so that sunlight can be fully utilized, crops and fruits in a backlight area can be irradiated by sufficient sunlight, the intensity of reflected light of a canopy layer, the quality of visible light and the net photosynthetic rate of leaves are improved, the maturation period is shortened, the coloring of the fruits is promoted, the sugar and the nutrient content of the fruits are improved, the soil microenvironment is adjusted, the growth and photosynthesis of trees are influenced, and the internal and external quality of the fruits is improved. Meanwhile, the herbicide can also repel pests such as aphids and the like, can reduce the use amount of pesticides to a certain extent, has the property of low light transmittance of the black film on the back, achieves the weeding effect by inhibiting the photosynthesis of weeds, has certain ultraviolet resistance, can be degraded, has adjustable degradation time, does not pollute the environment, and can be repeatedly used.
2. The manufacturing process is simple, the production cost is reduced, and the method is suitable for industrial mass production; the titanium dioxide and the size of the cylindrical particles thereof are utilized to effectively solve the problem of the light reflection rate of the mulching film, so that the light reflection rate of the front side of the mulching film reaches 90% or more.
Description of the drawings:
FIG. 1 is a schematic view of a portion of the equipment used in the manufacture of the present invention;
FIG. 2 is a schematic view of a lower stretcher profile for a twice-after-two gathered web according to one embodiment of the present invention;
FIG. 3 is a schematic view of a portion of the spin pack of the embodiment of FIG. 1;
FIG. 4 is a schematic diagram of the arrangement of spinneret holes on the spray head of the spinneret box of the embodiment of FIG. 3.
The specific implementation mode is as follows:
the conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, 2, 3 and 4, which are schematic views of preferred embodiments of the present invention, the present invention relates to a method for manufacturing a mulching film with high light reflectivity, which is characterized in that the mulching film is a double-sided mulching film composed of two layers of non-woven fabrics, the front surface is a white non-woven fabric capable of reflecting light, the back surface is a black non-woven fabric, and each layer of non-woven fabric is manufactured by the following steps:
1) taking materials according to the weight ratio: 88 to 92 percent of polypropylene matrix resin, 2 to 5 percent of anti-aging additive, 2 to 6 percent of titanium dioxide and 2 to 5 percent of pigment master batch, wherein the titanium dioxide is cylindrical particles with the diameter of 2mm and the height of 4.5 mm;
2) after the raw materials are put into a plastic mixer for full mixing, the materials are pumped into a screw extruder by a vacuum suction machine to be melted into melt and extruded;
3) extruding and discharging the melt into a filter through a screw extruder, filtering out impurities, feeding the filtered melt into a gear metering pump, feeding the filtered melt into a spinning box through the gear metering pump, spinning the melt into filaments by a nozzle of the spinning box under the self gravity, cooling the filaments by air-conditioning cold air, and stretching the filaments to obtain primary spun fibers;
4) drawing the spun fiber by a lower stretcher, and then dropping the spun fiber on a net curtain to polymerize into a net to form a non-woven fabric; the outlet of the lower stretcher forms a row of drawn wires which fall on the net curtain, and the arrangement direction of the drawn wires and the conveying direction of the net curtain form a crossed relation;
the non-woven fabrics of different layers are formed by successively drawing and polymerizing different lower drawing devices in the conveying direction of the net curtain, and the drawing arrangement directions of the non-woven fabrics of different layers are intersected on a wire falling plane of the net curtain; and finally, laminating and bonding the obtained non-woven fabrics of different layers together to form the agricultural mulching film. In this embodiment, different lower stretching devices 40 are above the filament dropping plane of the net curtain 50, the filaments output by the lower stretching devices 40 drop vertically onto the net curtain, the filament drawing arrangement directions of the nonwoven fabrics forming different layers are arranged in an intersecting manner on the filament dropping plane of the net curtain, the intersecting is preferably 45-degree intersecting, so that the filaments between the nonwoven fabrics of different layers are subjected to filament dropping and then are crosslinked to obtain a geometric shape, the crosslinking between the nonwoven fabrics of different layers is controlled through production, the tensile strength of the mulching film in the conveying direction of the net curtain is increased, the tearing resistance in the conveying direction perpendicular to the net curtain is also increased, the manufactured agricultural mulching film is not easy to tear in the transverse and vertical directions, the product is resistant to tearing, the service life is longer, the agricultural mulching film can be reused, and the use cost is reduced.
The preparation method is characterized in that the preparation method is not innovative raw materials, the polypropylene matrix resin, the anti-aging auxiliary agent, the titanium dioxide and the pigment master batch are the existing raw materials, and the quality of the raw materials is not repeated.
Example 1:
adding 90% of polypropylene matrix resin (PP), 3% of anti-aging auxiliary agent, 4% of titanium dioxide and 3% of pigment master batch into a screw extruder of a double-layer co-agent and double-layer composite film, melting the mixture at high temperature to form a molten state, filtering the molten solution by a solution filter, feeding the molten solution into a gear metering pump, metering the molten solution by the gear metering pump, feeding the molten solution into a spinning box, spraying the molten solution into filaments by a melt-spraying nozzle under the action of self gravity, stretching the filaments after the filaments are cooled by external air, conveying the filaments by a net curtain for hot rolling, finally cutting the filaments into rolls, packaging and warehousing. Wherein the titanium dioxide is cylindrical particles with the diameter of 2mm and the height of 4.5 mm. Theory shows that Rayleigh scattering occurs when the diameter of the particles in the atmosphere is about one tenth of the wavelength of the radiation; mie scattering occurs when the diameter of the particles in the atmosphere is comparable to the wavelength of the radiation; diffraction scattering occurs when the diameter of particles in the atmosphere is much larger than the wavelength of the radiation. Generally, the scattering is mainly caused by particles in the atmosphere, such as smoke, dust, droplets, aerosol, and the like. In the application, the titanium dioxide is uniformly mixed into the manufacturing material, so that similar effects can be achieved. Since the effective scattering size of actual particles is different from the actual particle size when they are scattered, it is necessary to find the optimum particle size to promote the optimal scattering effect. Through verification, the particles of the titanium dioxide have the best scattering and reflecting effects when the particles are cylindrical with the diameter of 2mm and the height of 4.5mm, and the reflecting rate reaches more than 90%.
Referring to fig. 1, 2, 3 and 4, in this embodiment, a central position of the spinning box 20 is provided with a feeding port 21, the feeding port 21 is opposite to a nozzle of the spinning box, the feeding port 21 is connected with a gear metering pump, so that the gear metering pump feeds a certain amount of melt with a certain pressure into the spinning box, the nozzle of the spinning box symmetrically extends in opposite directions from the center of the feeding port to obtain a longitudinal body, and a spinning hole 22 arranged on the nozzle gradually widens the diameter from the center of the feeding port to two ends of the nozzle in the longitudinal direction. By the aid of the structural design, silk threads sprayed by the spray heads can be uniformly full, the thickness of different silk threads is consistent, the thickness of the whole manufactured non-woven fabric is uniform under the same gram weight condition, the quality is consistent, and the gram weight of the mulching film is preferably 95 g. In order to further improve the quality of manufactured products, the minimum aperture of the spinneret orifice on the sprayer is preferably 0.5mm, and the manufactured agricultural mulching film is ensured to have good air permeability and light transmittance. Preferably, the melt is spun into filaments by a nozzle of a spinning box and then is stretched at the temperature of 128-130 ℃ at the stretching ratio of 180-220%; the temperature of air-conditioning cold air is 18 ℃, the wind power is 5.0-6.0m/s, the conveying speed of the net curtain is 50m/min, the non-woven fabric layers of different layers are bonded together by a hot rolling method, the temperature of an upper roller and a lower roller of the hot rolling is 160 ℃, and the manufactured mulching film has stable structure quality and good consistency.
The invention has simple manufacturing process, reduces the production cost, is suitable for industrialized mass production, the manufactured mulching film is composed of two layers of non-woven fabrics, has the characteristics of the non-woven fabrics, the front surface is a white film with high light reflection rate, the sunlight can be fully utilized, crops and fruits in a backlight area can be irradiated by sufficient sunlight, the reflection light intensity of a canopy layer, the visible light quality and the net photosynthetic rate of leaves are improved, the maturation period is shortened, the coloring of the fruits is promoted, the sugar content and the nutrient content of the fruits are improved, the soil microenvironment is adjusted, the growth and the photosynthesis of trees are influenced, and the internal and external quality of the fruits are improved. Meanwhile, the herbicide can also repel pests such as aphids and the like, can reduce the use amount of pesticides to a certain extent, has the property of low light transmittance of the black film on the back, achieves the weeding effect by inhibiting the photosynthesis of weeds, has certain ultraviolet resistance, can be degraded, has adjustable degradation time, does not pollute the environment, and can be repeatedly used. By the method, the problem of the light reflection rate of the mulching film is effectively solved by utilizing the titanium dioxide and the size of the cylindrical particles of the titanium dioxide, the light reflection rate of the front side of the mulching film reaches 90% or more, the light reflection rate of the mulching film is improved, the internal structure of the product is added with crosslinking, the product is tear-resistant, the thickness is uniform, the usability of the product is improved, and the service life of the product is prolonged.
It is to be understood that the foregoing detailed description of the present invention has been provided only for the purpose of illustrating the technical spirit and features of the present invention, and the present invention is not limited thereto.
Claims (4)
1. The manufacturing method of the mulching film with high light reflection rate is characterized in that the mulching film is a double-faced mulching film consisting of two layers of non-woven fabrics, the front surface of the mulching film is a white non-woven fabric capable of reflecting light, the back surface of the mulching film is a black non-woven fabric, and each layer of non-woven fabric is manufactured through the following steps:
1) taking materials according to the weight ratio: 88 to 92 percent of polypropylene matrix resin, 2 to 5 percent of anti-aging additive, 2 to 6 percent of titanium dioxide and 2 to 5 percent of pigment master batch, wherein the titanium dioxide is cylindrical particles with the diameter of 2mm and the height of 4.5 mm;
2) after the raw materials are put into a plastic mixer for full mixing, the materials are pumped into a screw extruder by a vacuum suction machine to be melted into melt and extruded;
3) extruding and discharging the melt into a filter through a screw extruder, filtering out impurities, feeding the filtered melt into a gear metering pump, feeding the filtered melt into a spinning box through the gear metering pump, spinning the melt into filaments by a nozzle of the spinning box under the self gravity, cooling the filaments by air-conditioning cold air, and stretching the filaments to obtain primary spun fibers;
4) drawing the spun fiber by a lower stretcher, and then dropping the spun fiber on a net curtain to polymerize into a net to form a non-woven fabric; the outlet of the lower stretcher forms a row of drawn wires which fall on the net curtain, and the arrangement direction of the drawn wires and the conveying direction of the net curtain form a crossed relation;
the non-woven fabrics of different layers are formed by successively drawing and polymerizing different lower drawing devices in the conveying direction of the net curtain, and the drawing arrangement directions of the non-woven fabrics of different layers are intersected on a wire falling plane of the net curtain; and finally, laminating and bonding the obtained non-woven fabrics of different layers together to form the agricultural mulching film.
2. The method for preparing mulching film with high light reflectivity as claimed in claim 1, wherein the central position of the spinning box is provided with a feeding port connected to the gear metering pump, the nozzles of the spinning box symmetrically extend from the center of the feeding port to opposite directions to form a longitudinal body, and the nozzle holes arranged on the nozzles gradually widen in diameter from the center of the feeding port to the two ends of the nozzles in the longitudinal direction.
3. The method for preparing a mulching film with high light reflectivity as claimed in claim 1, wherein the melt is spun by a nozzle of a spinning box and then stretched at a temperature of 128 ℃ to 130 ℃ at a stretch ratio of 180% to 220%; the temperature of cold air of the air conditioner is 18 ℃, and the wind power is 5.0-6.0 m/s.
4. The method as claimed in claim 1, wherein the web is transported at a speed of 50m/min, the nonwoven fabric layers of different layers are bonded together by hot rolling at a temperature of 160 ℃ between the upper and lower rollers.
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| CN202011373151.3A CN112626716A (en) | 2020-11-30 | 2020-11-30 | Manufacturing method of high-light-reflection-rate mulching film |
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| CN202011373151.3A CN112626716A (en) | 2020-11-30 | 2020-11-30 | Manufacturing method of high-light-reflection-rate mulching film |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114657709A (en) * | 2022-03-04 | 2022-06-24 | 东莞市威骏不织布有限公司 | Preparation method of grass-proof cloth and product |
| CN116837488A (en) * | 2023-07-01 | 2023-10-03 | 东莞市威骏不织布有限公司 | High-permeability durable reflective cloth and preparation method thereof |
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