Garden greening weeding cloth and preparation method thereof

Abstract

The invention relates to the technical field of functional weeding cloth, in particular to landscaping weeding cloth and a preparation method thereof. The weeding cloth is prepared from the following raw materials in parts by mass: 80 to 90 parts of polypropylene, 10 to 20 parts of polybutylene elastomer, 8 to 12 parts of carbon filler, 2 to 4 parts of black master batch and 1.5 to 5 parts of pesticide-loaded body, according to the landscaping weeding cloth and the preparation method thereof, the spinning cloth is prepared by blending the added carbon filler, so that good adsorption performance of the cloth can be provided, the cloth can be better attached to a pesticide-loaded body, the pesticide-loaded body is matched with the carbon filler to realize slow release of a pesticide, and remarkable weeding effect and weeding efficiency are realized; the arrangement of the carbon filler is beneficial to improving the weeding durability of the weeding cloth, and the problem of poor durability caused by rapid dissipation and release of the weeding agent during long-time outdoor covering treatment is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of functional weed control cloths, and in particular to a gardening weed control cloth and a preparation method thereof. Background Art

[0002] Weed control cloth is widely used in agricultural production. The weed control principle is mainly to hinder the photosynthesis of weeds by shading, so that the weeds grow slowly and then show the weed control effect.

[0003] The existing patent with authorization announcement number CN 106009561 B discloses a fully biodegradable weed control cloth and a preparation method thereof, which is made of the following components in parts by weight: 100 parts of polylactic acid, 0.1-15 parts of anti-hydrolysis agent, 0.01-5 parts of organic nucleating agent, 0.01-5 parts of inorganic nucleating agent, 0-10 parts of herbicide, 0-10 parts of fertilizer, 0-2 parts of colorant, 0-1 part of antioxidant, and 0-1 part of lubricant. The uniformly mixed material or modified polylactic acid particles are added to a plastic extrusion flat film flat wire machine to produce flat wire; the obtained flat wire is introduced into a plastic weaving machine to weave into a fully biodegradable woven weed control cloth; the uniformly mixed material or modified polylactic acid particles are added to a spunbond non-woven fabric spinning device, and the fully biodegradable spunbond non-woven weed control cloth is spun and reinforced by a hot rolling process; the above-mentioned fully biodegradable woven cloth and the fully biodegradable spunbond non-woven fabric are introduced into a composite device for composite, so that the upper layer is the fully biodegradable woven cloth and the lower layer is the fully biodegradable spunbond non-woven fabric, and the composite cloth is reinforced by a needle punching process to obtain the desired fully biodegradable composite weed control cloth.

[0004] The main technical problem solved by the above-mentioned weed control cloth is its degradable performance, but the weed control performance of the weed control cloth itself still belongs to the existing technology, that is, the principle of shading to hinder the growth of weeds. The shading process requires long-term laying, and the treatment effect on existing weeds is slow and inefficient; therefore, it is considered to design a weed control cloth that can quickly treat existing weeds and hinder the growth of subsequent weeds, so that its weed control effect and efficiency are higher; in view of this, we propose a landscaping weed control cloth and a preparation method thereof. Summary of the invention

[0005] The purpose of the present invention is to solve the deficiencies mentioned in the above background technology and provide a gardening weed control cloth and a preparation method thereof.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A gardening weed control cloth, wherein the weight percentages of the components of the raw materials of the weed control cloth are as follows:

[0008]

[0009] Preferably, the raw material of the carbon filler is one of rape straw powder, coconut shell powder and bamboo wood powder.

[0010] Preferably, the steps for preparing the carbon filler are specifically as follows:

[0011] Step 1: Select one of rape straw powder, coconut shell powder, and bamboo wood powder;

[0012] Step 2: Immerse the powder from step 1 in an activator, controlling the solid-liquid ratio to be 1:10-15;

[0013] Step 3: Set at 30-40℃, 150-300r / min, and stir for 18-24h;

[0014] Step 4: Dry in a 60-70℃ forced air drying oven for 36-48h, and wash with deionized water until neutral;

[0015] Step 5: Dry, grind and crush to obtain carbon filler for later use.

[0016] Preferably, the activator is 10 wt% diammonium hydrogen phosphate.

[0017] Preferably, after the grinding and crushing, the crushed material is sieved to obtain a crushed material with a particle size of 10-13 um.

[0018] Preferably, the pesticide carrier includes a pesticide reagent and a pesticide sustained-release carrier, and the weight fractions of the components of the pesticide sustained-release carrier raw materials are specifically as follows:

[0019]

[0020] Preferably, the steps for preparing the pharmaceutical sustained-release carrier are specifically as follows:

[0021] Step 1: Dissolve starch in deionized water according to the proportion, add sodium hydroxide and stir until it becomes a paste;

[0022] Step 2: Add acrylic acid and stir evenly, then add hydroxypropyl acrylate, diacetone acrylamide, N-hydroxymethyl acrylamide, and sodium hypophosphite in sequence and stir thoroughly;

[0023] Step 3: Place 60 Radiation polymerization in the Coγ-ray radiation field, controlling the radiation absorption dose to 5-8kGy.

[0024] Preferably, the preparation step of the pesticide carrier is as follows: mixing the sustained-release agent carrier, the pesticide reagent and water in a mass ratio of 1:1:10, drying in a drying oven at 50-70°C to form a solid powder, and grinding into 6.5-13 μm powder for standby use.

[0025] A method for preparing a gardening weed control cloth, the specific steps of the method for preparing the weed control cloth are:

[0026] Step 1: Put polypropylene, polybutylene elastomer, carbon filler and black masterbatch into a twin-screw extruder according to mass proportions, melt blend and push into the metering pump and die head, extrude and spin through the spinneret holes on the spinneret in the die head, and weave to obtain a gram weight of 20-25g / m 2 of fabric;

[0027] Step 2: Control the screw temperature to 175-225℃, the die temperature to 240-260℃, the metering pump to 6-8r / min, and the traction spinning speed to 45-50m / min;

[0028] Step 3: Weigh the pesticide-carrying body according to the mass fraction, dilute it and spray it on the fabric;

[0029] Step 4: Dry at 30-35°C to obtain the weed control cloth.

[0030] Preferably, the dilution concentration of the pesticide carrier is 1-1.5 g / ml.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. The gardening weed control cloth and its preparation method, by blending and adding carbon filler to prepare spinning cloth, can provide the cloth with good adsorption performance, so that it can better adhere to the pesticide carrier, and the pesticide carrier cooperates with the carbon filler to achieve the sustained release of the agent, thereby achieving significant weed control effect and weed control efficiency;

[0033] 2. The setting of carbon filler is conducive to improving the weed control durability of the weed control cloth, and avoiding the problem of poor sustainability caused by the rapid escape and release of herbicides during long-term outdoor covering treatment. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0035] The present invention describes the above technical solution in detail through the following embodiments:

[0036] Example 1

[0037] A gardening weed control cloth, wherein the weight fractions of the components of the raw materials of the weed control cloth are as follows:

[0038]

[0039]

[0040] Specifically, the black masterbatch in this embodiment is made of polypropylene material, that is, black polypropylene is directly used, specifically metallocene polypropylene sold by PetroChina Harbin Petrochemical Company, and the melt flow rate is 550g / 10min.

[0041] The polybutene elastomer used was Koattro PB M0600M sold by LyondellBasell, and the melt flow rate was 600 g / 10 min.

[0042] In this embodiment, the raw material of the carbon filler is rape straw powder, and the pesticide carrier includes a pesticide reagent and a pesticide sustained-release carrier. In this embodiment, the pesticide reagent is a post-emergence herbicide glyphosate isopropylamine salt with a content of 95%.

[0043] It should be noted that the carbon filler added in this embodiment has a porous carbon structure with a large surface area and adsorption properties.

[0044] The specific preparation steps of the carbon filler are as follows: first select rape straw powder, immerse it in 10wt% analytical pure diammonium phosphate activator sold by Sinopharm Chemical Reagent Company, control the solid-liquid ratio to 1:10, set 40℃, 150r / min, and stir for 24h; dry in a 70℃ forced air drying oven for 36h, wash with deionized water until it is neutral, then dry, grind and crush to obtain the crushed material with a particle size range of 10-13um as carbon filler for use.

[0045] The specific weight fractions of each component of the pharmaceutical sustained-release carrier raw material in this embodiment are:

[0046]

[0047]

[0048] In this embodiment, N-hydroxymethyl acrylamide, diacetone acrylamide, and hydroxypropyl acrylate were all purchased from Shanghai MacLean Biochemical Technology Co., Ltd. and sold in analytical grade specifications; acrylic acid, sodium hypophosphite, and sodium hydroxide were all purchased from Sinopharm Chemical Reagent Co., Ltd. and sold in analytical grade specifications; starch was purchased from Aladdin Biochemical Technology Co., Ltd. and sold potato starch.

[0049] The preparation steps of the sustained-release drug carrier of this embodiment are as follows: dissolve potatoes in deionized water according to the mass fraction, add sodium hydroxide and stir until it becomes a paste; add acrylic acid and stir evenly, then add hydroxypropyl acrylate, diacetone acrylamide, N-hydroxymethyl acrylamide and sodium hypophosphite in sequence and stir thoroughly; it should be explained that the mixture is placed in a 60Radiation polymerization is carried out in the Coγ-ray radiation field, and the radiation absorption dose is controlled to be 5kGy. The sustained-release carrier of the drug needs to obtain a polymerized structure through radiation.

[0050] Sodium hydroxide is mainly used to control the pH value of the product; the role of acrylic acid is to improve the grafting activity in the polymerization system and provide hydrophilic groups, hydroxypropyl acrylate provides ester adsorption groups; diacetone acrylamide provides active groups for cross-linking reactions; N-hydroxymethyl acrylamide can improve the reaction activity of the polymer and provide adsorption groups; sodium hypophosphite is a molecular weight regulator.

[0051] The preparation steps of the pesticide-carrying body are as follows: mixing the sustained-release agent carrier, the pesticide reagent and water in a mass ratio of 1:1:10, drying in a drying oven at 60°C to form a solid powder, grinding and sieving to obtain a powder with a particle size range of 6.5-13 μm for later use;

[0052] The present invention implements a method for preparing a gardening weed control cloth, and the specific steps of the method for preparing the weed control cloth are as follows:

[0053] Polypropylene, polybutylene elastomer, carbon filler and black masterbatch were put into a twin-screw extruder according to their mass proportions for melt blending and then pushed into a metering pump and a die head for extrusion and traction spinning through the spinneret holes on the spinneret in the die head to obtain a 25 g / m 2 of fabric;

[0054] Finally, the pesticide-carrying body was weighed according to the mass fraction, diluted to a concentration of 1.5 g / ml and sprayed evenly on the cloth, and dried at 35° C. to obtain the weed control cloth.

[0055] Example 2

[0056] The difference between this embodiment and embodiment 1 is that 1.5 parts of the pesticide carrier are added in this embodiment, and other conditions are the same.

[0057] Example 3

[0058] The difference between this embodiment and embodiment 1 is that the concentration of the pesticide-carrying body after dilution in this embodiment is 1 g / ml, and other conditions are the same.

[0059] Example 4

[0060] The only difference between this embodiment and embodiment 1 is that the carbon filler in this embodiment is 8 parts, and other conditions are the same.

[0061] Example 5

[0062] The difference between this embodiment and embodiment 1 is that the carbon filler in this embodiment is 12 parts, and other conditions are the same.

[0063] Comparative Example 1

[0064] The only difference between this comparative example and Example 1 is that no carbon filler and pesticide carrier are added in this comparative example, which serves as a blank control, and other conditions are the same.

[0065] Comparative Example 2

[0066] The only difference between this comparative example and Example 1 is that no carbon filler is added in this comparative example, and other conditions are the same.

[0067] Comparative Example 3

[0068] The difference between this comparative example and Example 1 is that no pesticide carrier is added in this comparative example, and other conditions are the same.

[0069] Comparative Example 4

[0070] The difference between this comparative example and Example 1 is that the concentration of the pesticide-carrying body after dilution in this comparative example is 0.5 g / ml, and other conditions are the same.

[0071] Comparative Example 5

[0072] The difference between this comparative example and Example 1 is that the concentration of the pesticide-carrying body after dilution in this comparative example is 2 g / ml, and other conditions are the same.

[0073] Comparative Example 6

[0074] The difference between this comparative example and Example 1 is that the carbon filler in this comparative example is 20 parts, and other conditions are the same.

[0075] According to the above examples 1-5 and comparative examples 1-5, weed control cloth samples were prepared respectively, and their weed control performance was tested. The specific weed control performance test steps are as follows:

[0076] First, select barnyard grass seeds and place them in a petri dish for cultivation. Select 1,000 white seeds and sow them in a seedling sponge. Cultivate them in a greenhouse until they reach the two-leaf stage.

[0077] Subsequently, each weed control cloth sample was placed on barnyard grass seeds and placed outdoors to test the number of surviving plants at 5, 10, and 15 days, and the weed control rate was calculated:

[0078] Weed control rate (%) = (total number of sown plants - number of surviving plants) / total number of sown plants × 100%;

[0079] The specific data is as follows:

[0080]

[0081] From the data in the above table, it can be seen that when the number of pesticide-carrying bodies in Example 2 is reduced, its initial weeding efficiency is not as good as that in Example 1, but the final 15-day weeding rate is also tending to be consistent; the difference between Example 3, Comparative Example 4, and Comparative Example 5 is that the concentrations of the pesticide-carrying bodies after dilution are different, but the dosage of the pesticide-carrying bodies is consistent. However, from the data, the weeding rate decreases with lower concentrations, while abnormal data appears at higher concentrations, which does not bring higher weeding efficiency. The early effect of promotion is not as good as that of Example 1. Considering that its concentration is too high, it will be released and lost in large quantities too early during the drying process, or the concentration may be too high and not well adsorbed and attached. According to the results, high concentration is not adopted;

[0082] It can be seen from the data of Example 4, Example 5 and Comparative Example 6 that if the content of the carbon filler is increased within the application range, the total weed control rate will be increased, but excessive carbon filler will cause a sharp drop in the weed control rate. The porous structure of the carbon filler can efficiently attach a large amount of pesticide carriers to enable them to be continuously released, but excessive carbon filler will also cause the problem that the pesticide carriers are adsorbed and difficult to release; however, if the carbon filler is not added, the weed control rate of Comparative Example 2 is high in the early stage and low in the later stage. It is considered that the lack of carbon filler will cause the pesticide carriers to overflow and be lost rapidly, resulting in a poor sustainable release ability, that is, the subsequent low dosage cannot continue to effectively weed, and the total weed control rate is not good;

[0083] The data of Comparative Example 1 show that the existing weed control cloth has a poor weed control rate and low efficiency. Comparative Example 1 is a blank control. The data of Comparative Example 3 is close to that of Comparative Example 1, indicating that the addition of carbon filler without a pesticide carrier does not improve the weed control rate, and it needs to be combined with a pesticide carrier;

[0084] Based on the data in the above table, Example 5 can be preferred.

[0085] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A gardening weed control cloth, characterized in that: The specific mass fractions of each component of the weed control cloth raw material are:

2. The gardening weed control cloth according to claim 1, characterized in that: The raw material of the carbon filler is one of rape straw powder, coconut shell powder and bamboo wood powder.

3. The gardening weed control cloth according to claim 1, characterized in that: The preparation steps of the carbon filler are specifically as follows: Step 1: Select one of rape straw powder, coconut shell powder, and bamboo wood powder; Step 2: Immerse the powder from step 1 in an activator, controlling the solid-liquid ratio to be 1:10-15; Step 3: Set at 30-40℃, 150-300r / min, and stir for 18-24h; Step 4: Dry in a 60-70℃ forced air drying oven for 36-48h, and wash with deionized water until neutral; Step 5: Dry, grind and crush to obtain carbon filler for later use.

4. The gardening weed control cloth according to claim 3, characterized in that: The activator is 10 wt% diammonium hydrogen phosphate.

5. The gardening weed control cloth according to claim 3, characterized in that: After the grinding and crushing, the crushed material with a particle size of 10-13 um is sieved.

6. The gardening weed control cloth according to claim 1, characterized in that: The pesticide carrier includes a pesticide reagent and a pesticide sustained-release carrier, and the weight fractions of the components of the raw materials of the pesticide sustained-release carrier are specifically as follows:

7. The gardening weed control cloth according to claim 6, characterized in that: The preparation steps of the pharmaceutical sustained-release carrier are specifically as follows: Step 1: Dissolve starch in deionized water according to the proportion, add sodium hydroxide and stir until it becomes a paste; Step 2: Add acrylic acid and stir evenly, then add hydroxypropyl acrylate, diacetone acrylamide, N-hydroxymethyl acrylamide, and sodium hypophosphite in sequence and stir thoroughly; Step 3: Place 60 Radiation polymerization in the Coγ-ray radiation field, controlling the radiation absorption dose to 5-8kGy.

8. The gardening weed control cloth according to claim 7, characterized in that: The preparation steps of the pesticide-carrying body are as follows: mixing the sustained-release agent carrier, the pesticide reagent and water in a mass ratio of 1:1:10, drying in a drying oven at 50-70°C to form solid powder, and grinding into 6.5-13 μm powder for standby use.

9. A method for preparing a gardening weed control cloth, applicable to the gardening weed control cloth according to any one of claims 1 to 8, characterized in that: The specific steps of the preparation method of the weed control cloth are: Step 1: Put polypropylene, polybutylene elastomer, carbon filler and black masterbatch into a twin-screw extruder according to mass proportions, melt blend and push into the metering pump and die head, extrude and spin through the spinneret holes on the spinneret in the die head, and weave to obtain a gram weight of 20-25g / m 2 of fabric; Step 2: Control the screw temperature to 175-225℃, the die temperature to 240-260℃, the metering pump to 6-8r / min, and the traction spinning speed to 45-50m / min; Step 3: Weigh the pesticide-carrying body according to the mass fraction, dilute it and spray it on the fabric; Step 4: Dry at 30-35°C to obtain the weed control cloth.

10. The method for preparing the gardening weed control cloth according to claim 9, characterized in that: The dilution concentration of the pesticide-carrying body is 1-1.5 g / ml.

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