High-weather-resistance weed barrier fabric and production process therefor

Abstract

A high-weather-resistance weed barrier fabric, comprising a polymer composite fiber non-woven fabric layer and a weather-resistant resin layer, wherein the weather-resistant resin layer is disposed on the outer layer of the polymer composite fiber non-woven fabric layer, and the weather-resistant resin layer coats the polymer composite fiber non-woven fabric layer; the polymer composite fiber non-woven fabric layer is composed of 60%-80% by mass of a polymer and 20%-40% by mass of a first filler; and the weather-resistant resin layer is composed of 45%-65% by mass of a weather-resistant resin, 30%-45% by mass of a second filler, and 10%-25% by mass of a functional aid. Further provided is a production process for a high-weather-resistance weed barrier fabric. The weed barrier fabric and the production process can achieve the effect of prolonging the service life of the weed barrier fabric.

Description

A high-weather-resistant weed control fabric and its production process Technical Field

[0001] This application relates to the field of weed control fabric technology, and in particular to a high weather-resistant weed control fabric and its manufacturing process. Background Technology

[0002] Weeds are resilient and can thrive even in harsh environments. On one hand, weeds occupy planting space for shrubs, trees, and cash crops, necessitating weeding before planting. On the other hand, weeds absorb nutrients and water from the soil, potentially impacting its fertility. Weed control fabric, as a weeding method, offers advantages over herbicides, including breathability and water permeability, maintaining soil moisture, increasing soil temperature, improving soil nutrition, and enhancing the root growth environment for crops.

[0003] Currently, weed control fabrics are mainly divided into two categories: woven plastic fabrics and non-woven fabrics. The main materials used are polyethylene, polypropylene, and polylactic acid. They are produced through processes such as mixing, feeding and heating extrusion, cooling and slitting, stretching and setting, and weaving. However, the produced weed control fabrics are mostly used outdoors and need to withstand the test of climate. Prolonged exposure to strong sunlight or harsh environments may cause the materials to gradually age and crack, affecting their weather resistance and reducing their service life. Summary of the Invention

[0004] This application provides a high-weather-resistant weed control fabric and its production process, which can improve the technical problem that weed control fabrics produced in related technologies are mostly used outdoors and need to withstand the test of climate. For example, if they are exposed to strong sunlight or harsh environments for a long time, the material may gradually age and crack, affecting its weather resistance and thus reducing the service life of the weed control fabric.

[0005] In a first aspect, embodiments of this application provide a high weather-resistant weed control fabric, the weed control fabric comprising a polymer composite fiber nonwoven fabric layer and a weather-resistant resin layer, the weather-resistant resin layer being disposed on the outer layer of the polymer composite fiber nonwoven fabric layer and encapsulating the polymer composite fiber nonwoven fabric layer, the polymer composite fiber nonwoven fabric layer being composed of 60%-80% polymer and 20%-40% first filler by mass percentage, the weather-resistant resin layer being composed of 45%-65% weather-resistant resin, 30%-45% second filler and 10%-25% functional additives by mass percentage.

[0006] The technical solutions described in this application embodiment have at least the following technical effects: the high weather-resistant weed control fabric includes a polymer composite fiber nonwoven fabric layer and a weather-resistant resin layer. The weather-resistant resin layer is provided on the outer layer of the polymer composite fiber nonwoven fabric layer, and a first filler is provided inside the polymer composite fiber nonwoven fabric layer. The filler can reflect ultraviolet rays. A second filler and functional additives are provided inside the weather-resistant resin layer. The weather-resistant resin layer can further provide a high reflectivity and has good dispersibility and strong antioxidant properties, thereby enhancing the weather resistance of the weed control fabric and increasing its service life.

[0007] In some embodiments, the polymer is any one of polylactic acid, polycaprolactone, or polyhydroxybutyrate, and a biodegradable polymer is used as a raw material to reduce environmental pollution.

[0008] In some embodiments, the first filler is a combination of any two of the following: quartz sand, titanium dioxide, borosilicate, and borosilicate.

[0009] In some embodiments, the weather-resistant resin includes any one or a combination of at least two of fluorocarbon resin, acrylic resin, or polyester resin.

[0010] In some embodiments, the second filler is composed of low-density polyethylene, high melt index linear low-density polyethylene, and coated titanium dioxide in a weight ratio of 5-30:5-30:40-80, wherein the coated titanium dioxide is inorganic surface-coated titanium dioxide, which further improves the light reflection effect.

[0011] In some embodiments, the functional additive consists of a dispersant and an antioxidant to improve dispersion performance and aging resistance.

[0012] In some embodiments, the dispersant is stearic acid or synthetic wax, and the antioxidant is antioxidant TH-168 or antioxidant 1010.

[0013] Secondly, embodiments of this application provide a production process for high weather-resistant weed control fabric, including the following steps:

[0014] S1. Mix the polymer and the first filler evenly, granulate, and then melt-extrude and spin to form polymer composite fiber;

[0015] S2. Polymer composite fibers are processed into polymer fiber nonwoven fabrics through a web-forming and hot rolling process.

[0016] S3. The raw material of polymer fiber nonwoven fabric coated with weather-resistant resin layer is dried to obtain polymer composite fiber nonwoven fabric with weather-resistant resin layer on surface.

[0017] In some embodiments, in step S3, the coating method of the raw material of the weather-resistant resin layer includes dip coating. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 is a flowchart of the production process of the high weather-resistant weed control fabric provided in the embodiment of this application. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the application will be further described in detail below with reference to the accompanying drawings and embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Weeds are resilient and can thrive even in harsh environments. On one hand, weeds occupy planting space for shrubs, trees, and cash crops, necessitating weeding before planting. On the other hand, weeds absorb nutrients and water from the soil, potentially impacting its fertility. Weed control fabric, as a weeding method, offers advantages over herbicides, including breathability and water permeability, maintaining soil moisture, increasing soil temperature, improving soil nutrition, and enhancing the root growth environment for crops.

[0022] Currently, weed control fabrics are mainly divided into two categories: woven plastic fabrics and non-woven fabrics. The main materials used are polyethylene, polypropylene, and polylactic acid. They are produced through processes such as mixing, feeding and heating extrusion, cooling and slitting, stretching and setting, and weaving. However, the produced weed control fabrics are mostly used outdoors and need to withstand the test of climate. Prolonged exposure to strong sunlight or harsh environments may cause the materials to gradually age and crack, affecting their weather resistance and reducing their service life.

[0023] Based on this, in order to improve the technical problem that weed control fabrics are mostly used outdoors and need to withstand the test of climate, such as being exposed to strong sunlight or harsh environments for a long time, the material may gradually age and crack, affecting its weather resistance and thus reducing the service life of the weed control fabric, the embodiments of this application provide the following solutions.

[0024] This application provides a high weather-resistant weed control fabric, which includes a polymer composite fiber nonwoven fabric layer and a weather-resistant resin layer. The weather-resistant resin layer is disposed on the outer layer of the polymer composite fiber nonwoven fabric layer and wraps around the polymer composite fiber nonwoven fabric layer. The polymer composite fiber nonwoven fabric layer is composed of 60%-80% polymer and 20%-40% first filler by weight, and the weather-resistant resin layer is composed of 45%-65% weather-resistant resin, 30%-45% second filler and 10%-25% functional additives by weight.

[0025] This application's high weather-resistant weed control fabric includes a polymer composite fiber nonwoven fabric layer and a weather-resistant resin layer. The weather-resistant resin layer is disposed on the outer layer of the polymer composite fiber nonwoven fabric layer, and a first filler is disposed inside the polymer composite fiber nonwoven fabric layer. The filler can reflect ultraviolet rays. A second filler and functional additives are disposed inside the weather-resistant resin layer. The weather-resistant resin layer can further provide a high reflectivity and has good dispersibility and strong antioxidant properties, thereby enhancing the weather resistance of the weed control fabric and increasing its service life.

[0026] It is understood that the polymer can be any one of polylactic acid, polycaprolactone, or polyhydroxybutyrate, and that using biodegradable polymers as raw materials reduces environmental pollution.

[0027] The first filler is a combination of any two of the following: quartz sand, titanium dioxide, borosilicate, and borosilicate; it can reflect light, especially ultraviolet light.

[0028] Weather-resistant resins include any one or a combination of at least two of fluorocarbon resins, acrylic resins, or polyester resins.

[0029] The second filler is composed of low-density polyethylene, high melt index linear low-density polyethylene, and coated titanium dioxide in a weight ratio of 5-30:5-30:40-80, wherein the coated titanium dioxide is inorganic surface-coated titanium dioxide, which further improves the light reflection effect.

[0030] Functional additives consist of dispersants and antioxidants, which improve dispersion performance and aging resistance.

[0031] The dispersant is stearic acid or synthetic wax, and the antioxidant is antioxidant TH-168 or antioxidant 1010.

[0032] This application also provides a production process for a high-weather-resistant weed control fabric, including the following steps:

[0033] S1. Mix the polymer and the first filler evenly, granulate, and then melt-extrude and spin to form polymer composite fiber;

[0034] S2. Polymer composite fibers are processed into polymer fiber nonwoven fabrics through a web-forming and hot rolling process.

[0035] S3. The raw material for coating the polymer fiber nonwoven fabric with a weather-resistant resin layer is then dried to obtain a polymer composite fiber nonwoven fabric with a weather-resistant resin layer on the surface. The coating method of the raw material for the weather-resistant resin layer includes dip coating.

[0036] Example 1:

[0037] (1) Mix 60% polylactic acid and 40% titanium dioxide and borosilicate by mass percentage, granulate, and then melt extrude and spin to form polymer composite fiber;

[0038] (2) Polymer composite fibers are processed by web forming and hot rolling to obtain polymer fiber nonwoven fabric;

[0039] (3) The polymer fiber nonwoven fabric is impregnated with the raw material of the weather-resistant resin layer and then dried to obtain a polymer composite fiber nonwoven fabric with a weather-resistant resin layer on the surface. The raw material of the weather-resistant resin layer includes a mixture of 45% fluorocarbon resin, 30% second filler and 25% stearic acid and antioxidant TH-168 by weight percentage, wherein the second filler is composed of low-density polyethylene, high melt index linear low-density polyethylene and coated titanium dioxide in a weight ratio of 5:5:40.

[0040] Example 2:

[0041] (1) Mix 80% polycaprolactone and 20% quartz sand and boromagnesite by mass, granulate, and then melt extrude and spin to form polymer composite fibers;

[0042] (2) Polymer composite fibers are processed by web forming and hot rolling to obtain polymer fiber nonwoven fabric;

[0043] (3) The polymer fiber nonwoven fabric is impregnated with the raw material of the weather-resistant resin layer and then dried to obtain a polymer composite fiber nonwoven fabric with a weather-resistant resin layer on the surface. The raw material of the weather-resistant resin layer includes a mixture of 65% acrylic resin, 20% second filler and 15% synthetic wax and antioxidant 1010 by weight percentage, wherein the second filler is composed of low-density polyethylene, high melt index linear low-density polyethylene and coated titanium dioxide in a weight ratio of 30:30:80.

[0044] Example 3:

[0045] (1) Mix 70% polyhydroxybutyrate and 30% borocalcite and boromagnesia evenly, granulate, and then melt extrude and spin to form polymer composite fibers;

[0046] (2) Polymer composite fibers are processed by web forming and hot rolling to obtain polymer fiber nonwoven fabric;

[0047] (3) The polymer fiber nonwoven fabric is impregnated with the raw material of the weather-resistant resin layer and then dried to obtain a polymer composite fiber nonwoven fabric with a weather-resistant resin layer on the surface. The raw material of the weather-resistant resin layer includes a mixture of 55% polyester resin, 35% second filler and 10% stearic acid and antioxidant 1010 by weight percentage, wherein the second filler is composed of low-density polyethylene, high melt index linear low-density polyethylene and coated titanium dioxide in a weight ratio of 20:15:60.

[0048] Comparative Example 1:

[0049] (1) 100% polylactic acid by mass is granulated, then melt-extruded and spun to form polymer composite fibers;

[0050] (2) Polymer composite fibers are processed by web forming and hot rolling to obtain polymer fiber nonwoven fabric;

[0051] (3) The polymer fiber nonwoven fabric is impregnated with the raw material of the weather-resistant resin layer and then dried to obtain a polymer composite fiber nonwoven fabric with a weather-resistant resin layer on the surface. The raw material of the weather-resistant resin layer includes a mixture of 45% fluorocarbon resin, 30% second filler and 25% stearic acid and antioxidant TH-168 by weight percentage, wherein the second filler is composed of low-density polyethylene, high melt index linear low-density polyethylene and coated titanium dioxide in a weight ratio of 5:5:40.

[0052] Comparative Example 2:

[0053] (1) Mix 80% polycaprolactone and 20% quartz sand and boromagnesite by mass, granulate, and then melt extrude and spin to form polymer composite fibers;

[0054] (2) Polymer composite fibers are processed by web forming and hot rolling to obtain polymer fiber nonwoven fabric;

[0055] (3) The polymer fiber nonwoven fabric is impregnated with the raw material of the weather-resistant resin layer and then dried to obtain a polymer composite fiber nonwoven fabric with a weather-resistant resin layer on the surface. The raw material of the weather-resistant resin layer includes a mixture of 65% acrylic resin and 35% synthetic wax and antioxidant 1010 by mass percentage.

[0056] Comparative Example 3:

[0057] A commercially available weed control fabric, the material of which is polypropylene nonwoven fabric.

[0058] Performance testing:

[0059] The weed control fabrics described in Examples 1-3 and Comparative Examples 1-3 were subjected to the following tests:

[0060] (1) Weed control effect: The ratio of weed area to total area is calculated. Weed control cloth is laid on 10 square meters of ground and left for 6 months. The ratio of weed area to total area is calculated. The lower the ratio, the better the weed control effect.

[0061] (2) Reflectivity: The reflectivity of the weed control fabric at 400-1100nm was tested;

[0062] (3) Service life: Based on the theoretical annual irradiance of 100KWh, the breaking elongation of the weed control mat after UV 800KWh was tested to measure the condition of the weed control fabric after 8 years of use.

[0063] The test results are shown in Table 1:

[0064] Table 1: Performance Tests of Examples 1-3 and Comparative Examples 1-3

[0065] It can be seen that the weed control fabric produced in Examples 1-3 has better weed control effect, higher reflectivity, higher weather resistance and longer service life compared with the weed control fabric produced in Comparative Examples 1-3 and commercially available fabrics.

[0066] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A highly weather-resistant weed-control fabric, characterized in that, The weed control fabric comprises a polymer composite fiber nonwoven fabric layer and a weather-resistant resin layer. The weather-resistant resin layer is disposed on the outer layer of the polymer composite fiber nonwoven fabric layer and encapsulates the polymer composite fiber nonwoven fabric layer. The polymer composite fiber nonwoven fabric layer is composed of 60%-80% polymer and 20%-40% first filler by weight. The weather-resistant resin layer is composed of 45%-65% weather-resistant resin, 30%-45% second filler, and 10%-25% functional additives by weight.

2. The high weather-resistant weed control fabric according to claim 1, characterized in that, The polymer is any one of polylactic acid, polycaprolactone, or polyhydroxybutyrate.

3. The high weather-resistant weed control fabric according to claim 1, characterized in that, The first filler is a combination of any two of the following: quartz sand, titanium dioxide, borocalcite, and boromagnesia.

4. The high weather-resistant weed control fabric according to claim 1, characterized in that, The weather-resistant resin includes any one or a combination of at least two of fluorocarbon resin, acrylic resin, or polyester resin.

5. The high weather-resistant weed control fabric according to claim 1, characterized in that, The second filler is composed of low-density polyethylene, high melt index linear low-density polyethylene, and coated titanium dioxide in a weight ratio of 5-30:5-30:40-80, wherein the coated titanium dioxide is inorganic surface-coated titanium dioxide.

6. The high weather-resistant weed control fabric according to claim 1, characterized in that, The functional additives consist of dispersants and antioxidants.

7. The high weather-resistant weed control fabric according to claim 1, characterized in that, The dispersant is stearic acid or synthetic wax, and the antioxidant is antioxidant TH-168 or antioxidant 1010.

8. A production process for a high-weather-resistant weed control fabric, characterized in that, The production process includes the following steps: S1. Mix the polymer and the first filler evenly, granulate, and then melt-extrude and spin to form polymer composite fiber; S2. Polymer composite fibers are processed into polymer fiber nonwoven fabrics through a web-forming and hot rolling process. S3. The raw material of polymer fiber nonwoven fabric coated with weather-resistant resin layer is dried to obtain polymer composite fiber nonwoven fabric with weather-resistant resin layer on surface.

9. The production process according to claim 8, characterized in that, In step S3, the coating method of the raw material of the weather-resistant resin layer includes dip coating.

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