Preparation method of wrinkled mulching film paper suitable for sowing rice by unmanned aerial vehicle

Abstract

The invention relates to the technical field of preparation of wrinkled mulching film paper, in particular to a preparation method of wrinkled mulching film paper suitable for rice sowing by an unmanned aerial vehicle, and the preparation method of the wrinkled mulching film paper comprises the following steps: S1, preparing wrinkled core paper from waste paper through a papermaking process; s2, spraying and coating the wrinkled core paper obtained in the step S1, forming an organic coating layer on the surface layer of the wrinkled core paper, and drying to form original mulching film paper; and S3, coiling the original mulching film paper obtained in the step S2 to prepare a finished mulching film paper product. The unmanned aerial vehicle has the effect of solving the problem that after rice is sown by the unmanned aerial vehicle, weed growth still needs to be controlled in a pesticide spraying mode, and consequently food safety and soil pollution are harmed.

Description

Technical Field

[0001] The invention relates to the field of wrinkled mulch paper preparation technology, and in particular to a method for preparing wrinkled mulch paper suitable for unmanned aerial vehicle (UAV) rice sowing. Background Art

[0002] The application of drones in rice seeding has become an important part of modern agricultural technology. Drone seeding technology uses drones to carry seeding equipment to accurately sow seeds in farmland. Through precise route planning and flight control systems, it ensures the uniformity and accuracy of seeding, thereby improving the emergence rate of crops.

[0003] Currently in Zhejiang Province and most southern regions, 90% of rice planting is done by drone sowing, and only 10% is done by machine transplanting. However, drone rice sowing cannot solve the weed problem. Pesticides must be applied three times per season to control the growth of weeds, which is extremely harmful to food safety and soil pollution. Summary of the invention

[0004] In order to improve the problem that after drone rice sowing, weed growth still needs to be controlled by spraying pesticides, which causes harm to food safety and soil pollution, the present application provides a method for preparing wrinkled mulch paper suitable for drone rice sowing.

[0005] The present application provides a method for preparing a wrinkled mulch paper suitable for drone rice sowing, which adopts the following technical solution:

[0006] A method for preparing a wrinkled mulch paper suitable for unmanned aerial vehicle sowing rice, the method comprising:

[0007] S1. Using waste paper to prepare corrugated core paper through a papermaking process;

[0008] S2, spray coating the corrugated core paper obtained in S1 to form an organic coating layer on the surface layer of the corrugated core paper, and forming an original film paper after drying;

[0009] S3, rolling up the original ground film paper obtained in S2 to obtain a finished ground film paper product.

[0010] Preferably, the specific steps in S1 include:

[0011] S11, pulping: Add waste cardboard into the pulper for pulping to obtain high-concentration pulp:

[0012] S12, impurity removal: high-concentration desander and pressure screen are used in sequence to remove impurities and stickies from the high-concentration slurry in S11;

[0013] S13, flotation low-concentration sand removal: the slurry obtained after removing impurities in S12 is sent to the flotation tank to remove impurities such as ink and adhesives;

[0014] S14, low-concentration sand removal: the flotation slurry obtained in S13 is put into a low-concentration heavy slag remover to remove other heavy impurities, mainly sand particles, in the slurry to obtain a sand-removed slurry;

[0015] S15, fine screening: putting the sand-removed mortar prepared in S14 into a fine screening pressure screen for screening to remove fine impurities in the slurry and obtain clean slurry;

[0016] S16, multi-disc concentrating: putting the clean slurry obtained in S15 into a multi-disc concentrator for concentrating to obtain a concentrated slurry;

[0017] S17, thermal dispersion: performing thermal dispersion treatment on the concentrated slurry obtained in S16 to refine the hot melt in the concentrated slurry;

[0018] S18, sending to the pulping tank: the pulp after the heat dispersion treatment in S17 is sent to the pulp storage tower and then to the pulping tank of the papermaking workshop. The pulp in the pulping tank is refined to a beating degree of 50°SR by a leveling mill and then sent to the pulping tank for mixing;

[0019] S19, wrinkled ground paper forming: send the mixed pulp in S18 to the high-speed tissue paper machine to produce 38-40g / m 2 Quantitatively creped ground paper (crepe elongation 8-14%.

[0020] Preferably, when the slurry in S18 is mixed in the pulping tank, 30 g of PAE and 0.15 g of retention aid CPAM need to be added in sequence.

[0021] Preferably, the spray-coated coating comprises starch, urea and carbon black, and its preparation method is as follows (preparation of 2000 ml of coating): (1) adding 80 kg of corn starch to 1800 ml of water and stirring at 500 r / min for 30 minutes using a disperser at room temperature to evenly disperse the starch; (2) then slowly adding 100 kg of absolute dry amount of urea and continuing to stir at 1000 r / min for 30 minutes; (3) adding 20 kg of carbon black and continuing to stir at 5000 r / min for 25 minutes to fully disperse it.

[0022] In summary, this application includes the following beneficial technical effects:

[0023] 1. The present invention provides a method for preparing a wrinkled mulch paper suitable for drone sowing of rice. The prepared wrinkled mulch paper has the characteristics of high strength and ultra-thinness, is suitable for drone sowing to produce organic rice, and has the functions of light protection, opacity, heat preservation and breathability, water absorption and moisture absorption, which makes it difficult for weeds to grow and no herbicide is needed in the later stage.

[0024] 2. The organic waste coating on the mulch paper prepared in the present application has the function of slow release, improving soil fertility, promoting rice sprout rooting and soil repair.

[0025] 3. This application makes full use of recycled fibers and uses the production process with the lowest comprehensive energy consumption to create a new type of high-value-added paper-based material with a carbon footprint. It does not need to be collected and processed due to biodegradation. After harvesting, it is plowed into the soil. It can be naturally decomposed by microorganisms in the soil and at the same time achieve the effect of loosening the soil.

[0026] 4. Compared with common mulch paper, the present invention has good expansion and contraction performance and higher dry and wet strength, and is easy to operate in the field. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic flow chart of a method for preparing a wrinkled mulch paper suitable for unmanned aerial vehicle rice sowing in an embodiment of the present application;

[0028] Figure 2 It is a schematic diagram of the process used to embody S1 in the embodiment of the present application.

[0029] Description of the accompanying drawings: . DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the scheme of the present invention, the scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiment is only an embodiment of a part of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two original components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The present application discloses a method for preparing a wrinkled ground film paper suitable for drone rice sowing. Figure 1 and Figure 2 , a method for preparing a wrinkled mulch paper suitable for unmanned aerial vehicle sowing rice, the method for preparing the wrinkled mulch paper comprising:

[0033] S1. Using waste paper to prepare corrugated core paper through a papermaking process;

[0034] S2, spray coating the corrugated core paper obtained in S1 to form an organic coating layer on the surface layer of the corrugated core paper, and forming an original film paper after drying;

[0035] S3, rolling up the original ground film paper obtained in S2 to obtain a finished ground film paper product.

[0036] The specific steps in S1 include:

[0037] S11, pulping: Add waste cardboard into the pulper for pulping to obtain high-concentration pulp:

[0038] S12, impurity removal: high-concentration desander and pressure screen are used in sequence to remove impurities and stickies from the high-concentration slurry in S11;

[0039] S13, flotation low-concentration sand removal: the slurry obtained after removing impurities in S12 is sent to the flotation tank to remove impurities such as ink and adhesives;

[0040] S14, low-concentration sand removal: the flotation slurry obtained in S13 is put into a low-concentration heavy slag remover to remove other heavy impurities, mainly sand particles, in the slurry to obtain a sand-removed slurry;

[0041] S15, fine screening: putting the sand-removed mortar prepared in S14 into a fine screening pressure screen for screening to remove fine impurities in the slurry and obtain clean slurry;

[0042] S16, multi-disc concentrating: putting the clean slurry obtained in S15 into a multi-disc concentrator for concentrating to obtain a concentrated slurry;

[0043] S17, thermal dispersion: performing thermal dispersion treatment on the concentrated slurry obtained in S16 to refine the hot melt in the concentrated slurry;

[0044] S18, sending to the pulping tank: the pulp after the heat dispersion treatment in S17 is sent to the pulp storage tower and then to the pulping tank of the papermaking workshop. The pulp in the pulping tank is refined to a beating degree of 50°SR by a leveling mill and then sent to the pulping tank for mixing;

[0045] S19, wrinkled ground paper forming: send the mixed pulp in S18 to the high-speed tissue paper machine to produce 38-40g / m 2 Quantitatively creped ground paper (crepe elongation 8-14%.

[0046] Embodiment 1:

[0047] The purpose of this embodiment is to provide a mulch paper that can be degraded in 2-4 months with a basis weight of 40g / m 2 , specifically prepared by the following operations:

[0048] (1) Weigh 800g of recycled pulp made of 13# US waste paperboard and add 200g of recycled pulp made of 11-12# US waste paperboard. Use a pulper to crush all the pulp into pulp in a 25% concentration drum pulper. After the pulp is diluted (concentration 5%), a high-concentration desander and a pressure screen are used in turn to remove impurities and adhesives. The pulp is then diluted to a concentration of 1%. After flotation, fine screening and a low-concentration desander are used to further remove impurities, ink and adhesives in the pulp. Finally, a multi-disc thickener is used to concentrate the pulp. After disc heat dispersion and double-disc grinding, the pulp freeness is reduced to 300ml. The screened and ground pulp is poured into a pulping tank.

[0049] (2) Pour the obtained slurry into a pulping tank, and add 30 g of PAE and 0.15 g of retention aid CPAM to the slurry in sequence. Pass the mixed slurry through a pre-net pressure screen (to remove impurities) into a headbox, with a net concentration of 0.4%, a paper machine speed of 1700 m / min, and a shoe pressure of 120 KN / m 2 , the pressing dryness is 44%, the drying cylinder pressure of the drying section is 720kPa, the paper moisture is 8%, the wrinkling is 15-18%, the organic coating storage tank concentration is 30%, and the working tank concentration is 10%.

[0050] (3) Preparation of coating: The coating mainly includes starch, urea and carbon black, and its preparation method is as follows (preparation of 2000 ml of coating): 80 kg of corn starch is added to 1800 ml of water and stirred at 500 r / min for 30 minutes using a disperser at room temperature to evenly disperse the starch; then, 100 kg of urea is slowly added in an absolute dry amount and stirred at 1000 r / min for 30 minutes; and 20 kg of carbon black is added and stirred at 5000 r / min for 25 minutes to fully disperse it.

[0051] (4) The coating is sprayed, with a coating amount of 3-8g / m 2 The paper weight is 40g / m 2 The wrinkled mulch paper can be degraded in 3-4 months, and the soil nitrogen content increases by 2.50g / m 2 .

[0052] Embodiment 2:

[0053] The purpose of this embodiment is to provide a mulch paper that can be degraded in 1-3 months with a basis weight of 35g / m 2 , specifically prepared by the following operations:

[0054] (1) Weigh 800g of recycled pulp made of 13# US waste paperboard and add 200g of recycled pulp made of 11-12# US waste paperboard. Use a pulper to crush all the pulp into pulp in a 25% concentration drum pulper. After the pulp is diluted (concentration 5%), a high-concentration desander and a pressure screen are used in turn to remove impurities and adhesives. The pulp is then diluted to a concentration of 1%. After flotation, fine screening and a low-concentration desander are used to further remove impurities, ink and adhesives in the pulp. Finally, a multi-disc thickener is used to concentrate the pulp. After disc heat dispersion and double-disc grinding, the pulp freeness is reduced to 300ml. The screened and ground pulp is poured into a pulping tank.

[0055] (2) Pour the obtained slurry into a pulping tank, and add 30 g of PAE and 0.15 g of retention aid CPAM to the slurry in sequence. Pass the mixed slurry through a pre-net pressure screen (to remove impurities) into a headbox, with a net concentration of 0.4%, a paper machine speed of 1700 m / min, and a shoe pressure of 105 KN / m 2 , press dryness 44%, drying cylinder pressure in the drying section: 700kPa, paper moisture 8%, wrinkle 15-18%, organic coating storage tank concentration 30%, working tank concentration 10%.

[0056] (3) Preparation of coating: The coating mainly includes starch, urea and carbon black, and its preparation method is as follows (preparation of 2000 ml of coating): 80 kg of corn starch is added to 1800 ml of water and stirred at 500 r / min for 30 minutes using a disperser at room temperature to evenly disperse the starch; then, 100 kg of urea is slowly added in an absolute dry amount and stirred at 1000 r / min for 30 minutes; and 20 kg of carbon black is added and stirred at 5000 r / min for 25 minutes to fully disperse it.

[0057] The coating is sprayed, with a coating amount of 2-6g / m 2 The paper weight is 35g / m 2 The wrinkled mulch paper can be degraded in 1-3 months, and the soil nitrogen content increases by 1.8g / m 2 .

[0058] Embodiment three:

[0059] The purpose of this embodiment is to provide a mulch paper that can be degraded in 1-2 months with a basis weight of 30g / m 2 , specifically prepared by the following operations:

[0060] (1) Weigh 1000g of recycled pulp made of 13# US waste paperboard, use a pulper to crush all the pulp into pulp in a 25% concentration drum pulper, dilute the pulp (concentration 5%), and then use a high-concentration desander and a pressure screen to remove impurities and adhesives, and then dilute the pulp to 1% concentration. After flotation, fine screening and low-concentration desander, impurities, ink and adhesives in the pulp are further removed. Finally, a multi-disc thickener is used to concentrate the pulp. After disc heat dispersion and double-disc grinding, the pulp freeness is reduced to 300ml, and the screened and ground pulp is poured into a pulping tank.

[0061] (2) Pour the obtained slurry into a pulping tank, and add 30 g of PAE and 0.15 g of retention aid CPAM to the slurry in sequence. Pass the mixed slurry through a pre-net pressure screen (to remove impurities) into a headbox, with a net concentration of 0.4%, a paper machine speed of 1700 m / min, and a shoe pressure of 100 N / m 2 , press dryness 44%, drying cylinder pressure in the drying section: 680kPa, paper moisture 8%, wrinkle 15-18%, organic coating storage tank concentration 30%, working tank concentration 10%.

[0062] (3) Preparation of coating: The coating mainly includes starch, urea and carbon black, and its preparation method is as follows (preparation of 2000 ml of coating): 80 kg of corn starch is added to 1800 ml of water and stirred at 500 r / min for 30 minutes using a disperser at room temperature to evenly disperse the starch; then, 100 kg of urea is slowly added in an absolute dry amount and stirred at 1000 r / min for 30 minutes; and 20 kg of carbon black is added and stirred at 5000 r / min for 25 minutes to fully disperse it.

[0063] (4) The coating is sprayed, with a coating amount of 1-3g / m 2 The paper weight is 30g / m 2 The wrinkled mulch paper can be degraded in 1-2 months, and the soil nitrogen content increases by 1.6g / m 2 .

[0064] The present embodiment provides a method for preparing wrinkled mulch paper suitable for drone rice sowing, which makes full use of recycled fibers and uses the production process with the lowest comprehensive energy consumption to create a new type of high-value-added paper-based material with a carbon footprint. The prepared mulch paper covering is gradually decomposed by microorganisms in the field. After about 50-60 days, the mulch paper will rot and does not need to be collected, and will not cause soil pollution. After the crops are harvested, they are plowed and decomposed by microorganisms. 98% of the decomposed products are natural single plant fibers and 0-2% nitrogen fertilizer, which has the function of slow release to improve soil fertility, promote rice sprout rooting and soil repair.

[0065] The prepared wrinkled mulch paper has the characteristics of high strength and ultra-thinness, which is suitable for drone sowing to produce organic rice. It also has the functions of light-proofing, opacity, heat preservation and breathability, water absorption and moisture absorption, which makes it difficult for weeds to grow and no herbicides are needed in the later stage. Compared with ordinary mulch paper, it has good elasticity and higher dry and wet strength, and is easy to operate in the field.

[0066] Finally, it should be noted that the above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A method for preparing wrinkled mulch paper suitable for unmanned aerial vehicle sowing rice, characterized in that: The preparation method of the wrinkled ground film paper comprises: S1. Using waste paper to prepare corrugated core paper through a papermaking process; S2, spray coating the corrugated core paper obtained in S1 to form an organic coating layer on the surface layer of the corrugated core paper, and forming an original film paper after drying; S3, rolling up the original ground film paper obtained in S2 to obtain a finished ground film paper product.

2. The method for preparing a wrinkled mulch paper suitable for unmanned aerial vehicle rice sowing according to claim 1, characterized in that: The specific steps in S1 include: S11, pulping: Add waste cardboard into the pulper for pulping to obtain high-concentration pulp: S12, impurity removal: high-concentration desander and pressure screen are used in sequence to remove impurities and stickies from the high-concentration slurry in S11; S13, flotation low-concentration sand removal: the slurry obtained after removing impurities in S12 is sent to the flotation tank to remove impurities such as ink and adhesives; S14, low-concentration sand removal: the flotation slurry obtained in S13 is put into a low-concentration heavy slag remover to remove other heavy impurities, mainly sand particles, in the slurry to obtain a sand-removed slurry; S15, fine screening: putting the sand-removed mortar prepared in S14 into a fine screening pressure screen for screening to remove fine impurities in the slurry and obtain clean slurry; S16, multi-disc concentrating: putting the clean slurry obtained in S15 into a multi-disc concentrator for concentrating to obtain a concentrated slurry; S17, thermal dispersion: performing thermal dispersion treatment on the concentrated slurry obtained in S16 to refine the hot melt in the concentrated slurry; S18, sending to the pulping tank: the pulp after the heat dispersion treatment in S17 is sent to the pulp storage tower and then to the pulping tank of the papermaking workshop. The pulp in the pulping tank is refined to a beating degree of 50°SR by a leveling mill and then sent to the pulping tank for mixing; S19, wrinkled ground paper forming: send the mixed pulp in S18 to the high-speed tissue paper machine to produce 38-40g / m 2 Quantitatively creped ground paper (crepe elongation 8-14%.

3. The method for preparing a wrinkled mulch paper suitable for unmanned aerial vehicle rice sowing according to claim 2, characterized in that: When the slurry in S18 is mixed in the pulping tank, 30 g of PAE and 0.15 g of retention aid CPAM need to be added in sequence.

4. The method for preparing a wrinkled mulch paper suitable for unmanned aerial vehicle rice sowing according to claim 1, characterized in that: The spray coating comprises starch, urea and carbon black, and its preparation method is as follows (preparation of 2000 ml of coating): (1) adding 80 kg of corn starch into 1800 ml of water and stirring at 500 r / min for 30 minutes using a disperser at room temperature to evenly disperse the starch; (2) then slowly adding 100 kg of absolute dry urea and continuing stirring at 1000 r / min for 30 minutes; (3) adding 20 kg of carbon black and continuing stirring at 5000 r / min for 25 minutes to fully disperse it.

Images