Anti-aging high-strength drip irrigation tape

Abstract

The invention discloses an anti-aging high-strength drip irrigation tape, which is prepared from the following components: co-polypropylene, polyamide 6, ethylene-vinyl acetate, nano zinc oxide, a triazine ultraviolet light absorber, an organic nickel ultraviolet quenching agent, a phosphite antioxidant and graphene nanosheets, the drip irrigation tape is prepared from the following components in parts by weight: 35 parts of co-polypropylene, 20 parts of polyamide 6, 12 parts of ethylene-vinyl acetate, 6 parts of nano-zinc oxide, 0.4 part of a triazine ultraviolet light absorber, 0.15 part of an organic nickel ultraviolet quenching agent, 0.3 part of a phosphite antioxidant and 0.8 part of graphene nanosheets, wherein co-polypropylene and polyamide 6 form a rigid-tough complementary structure; graphene is combined to enhance the supporting force, so that the pipe is compression-resistant and tear-resistant; the outer layer nano zinc oxide and the like construct a photoaging protection system, and the middle layer phosphite inhibits thermo-oxidative aging, so that stable use in multiple climates is realized.

Description

Technical Field

[0001] This invention relates to the field of polymer technology, and in particular to a high-strength drip irrigation tape that is resistant to aging. Background Technology

[0002] Drip irrigation tape is an important tool in agricultural irrigation. Its core function is to provide water and nutrients to crops through controlled dripping. Water is slowly delivered to the soil near the roots of crops in droplets or thin streams through drippers. Compared with traditional flood irrigation, it can save 30% to 70% of water, and is especially suitable for arid and semi-arid areas or farmland with scarce water resources. However, when using it, most existing drip irrigation tapes are made of single polyethylene material, which has an imbalance between rigidity and toughness, low burst pressure and poor tear resistance. It is easily scratched by sharp objects during laying, and is prone to breakage when exposed to water pressure fluctuations or soil compression. It lacks a reinforcement system, and the pipe has a low elastic modulus. It is prone to collapse and deformation under soil gravity or mechanical action, which leads to the offset of dripper spacing and affects irrigation uniformity. It does not have a synergistic anti-ultraviolet design. Under ultraviolet radiation, the polymer molecular chains are prone to breakage. When used outdoors, it hardens and becomes brittle in a short period of time, and the surface cracks and leaks. Under high temperature environment, the pipe is prone to oxidation and softening, and even melting and breaking, which cannot adapt to the high temperature irrigation scenario in summer. Summary of the Invention

[0003] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a high-strength drip irrigation tape with aging resistance. The copolymer polypropylene and polyamide 6 form a rigid and tough complementary structure, and the pipe can withstand high burst pressure, has excellent tear resistance, and can resist deformation and breakage caused by external forces. Graphene nanosheets are uniformly dispersed in the matrix to enhance the overall structural support and avoid deformation caused by compression during laying or use. The outer layer material forms a "shielding-absorption-quenching" protection mechanism through the synergistic effect of nano zinc oxide, triazine ultraviolet absorbers and organic nickel quenchers, which significantly slows down the photoaging rate and extends the outdoor service life. The phosphite antioxidant added to the middle layer can effectively inhibit thermo-oxidative aging, so that the pipe can still maintain stable performance in high-temperature environments and adapt to different climatic conditions.

[0004] The present invention also provides a high-strength drip irrigation tape with the above-mentioned aging resistance, comprising: copolymer polypropylene, polyamide hexamethasone, ethylene-vinyl acetate, nano zinc oxide, triazine UV absorber, organonickel UV quencher, phosphite antioxidant, and graphene nanosheets. The weight ratio of the drip irrigation tape is as follows: 35 parts copolymer polypropylene, 20 parts polyamide hexamethasone, 12 parts ethylene-vinyl acetate, 6 parts nano zinc oxide, 0.4 parts triazine UV absorber, 0.15 parts organonickel UV quencher, 0.3 parts phosphite antioxidant, and 0.8 parts graphene nanosheets.

[0005] A method for preparing a high-strength, aging-resistant drip irrigation tape, characterized by the following steps: S1: Raw material premixing: Mix the outer layer material, middle layer material and inner layer material evenly, and put them into a high-speed mixer and stir at 80℃ for 15 minutes.

[0006] S2: Three-layer co-extrusion: Using conventional three-layer co-extrusion equipment, the extrusion temperature is set as follows: outer layer 180-190℃, middle layer 190-200℃, inner layer 180-185℃; the melt flow is controlled by the screw speed, and the tube and strip are directly extruded.

[0007] S3: Chemical cross-linking treatment: Immerse the extruded tubing in an ethanol solution of 0.5% peroxide for 10 min, then remove it and cross-link it in an 80℃ hot air circulating oven for 2 h.

[0008] S4: Dropper forming and post-processing: Pre-made droppers are embedded into the tubing using a mechanical nesting process, shaped using a water ring cooling system, and then cut into finished products after processing by a traction machine and a coiling machine.

[0009] According to the present invention, a high-strength, aging-resistant drip irrigation tape is provided, wherein the drip irrigation tape adopts a three-layer co-extruded composite structure, and each layer is composed of: 1) The outer layer is made of a mixture of polyamide hexa, ethylene-vinyl acetate, nano zinc oxide, triazine UV absorber, organonickel UV quencher, phosphite antioxidant, and graphene nanosheets, with a thickness of 0.3 mm; 2) The middle layer is made of a mixture of copolymer polypropylene and graphene nanosheets, with a thickness of 0.5 mm; 3) The inner layer is made of a mixture of ethylene-vinyl acetate and polyamide hexamethasone, with a thickness of 0.2 mm.

[0010] According to the present invention, a high-strength drip irrigation tape with anti-aging properties is provided, wherein the triazine-based ultraviolet absorber is specifically cyanuric chloride.

[0011] According to the present invention, a high-strength drip irrigation tape with anti-aging properties is provided, wherein the organic nickel ultraviolet quencher is specifically a nickel salt.

[0012] According to the present invention, a high-strength drip irrigation tape with resistance to aging is provided, wherein the phosphite antioxidant is specifically phosphorus trichloride.

[0013] Compared to existing technologies, this high-strength, aging-resistant drip irrigation tape features a complementary rigid and tough structure formed by copolymerized polypropylene and polyamide 6. The pipe can withstand high burst pressure, exhibits excellent tear resistance, and resists deformation and breakage caused by external forces. Graphene nanosheets are uniformly dispersed within the matrix, enhancing the overall structural support and preventing deformation due to compression during installation or use. The outer layer material, through the synergistic effect of nano-zinc oxide, triazine UV absorbers, and organocnidium quenchers, forms a "shielding-absorption-quenching" protection mechanism, significantly slowing down photoaging and extending outdoor service life. The phosphite antioxidant added to the middle layer effectively inhibits thermo-oxidative aging, ensuring stable performance even at high temperatures and adapting to various climatic conditions. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a flowchart of the high-strength, aging-resistant drip irrigation tape of the present invention. Detailed Implementation

[0015] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0016] Example Reference Figure 1 This invention discloses a high-strength, aging-resistant drip irrigation tape, comprising: copolymer polypropylene, polyamide hexamethasone, ethylene-vinyl acetate, nano zinc oxide, triazine UV absorber, organonickel UV quencher, phosphite antioxidant, and graphene nanosheets. The weight ratio of the drip irrigation tape is as follows: 35 parts copolymer polypropylene, 20 parts polyamide hexamethasone, 12 parts ethylene-vinyl acetate, 6 parts nano zinc oxide, 0.4 parts triazine UV absorber, 0.15 parts organonickel UV quencher, 0.3 parts phosphite antioxidant, and 0.8 parts graphene nanosheets. This drip irrigation tape uses a three-layer... The co-extruded composite structure consists of the following layers: 1) Outer layer: made of polyamide hexa, ethylene-vinyl acetate, nano zinc oxide, triazine UV absorber, organonickel UV quencher, phosphite antioxidant, and graphene nanosheets, with a thickness of 0.3 mm; 2) Middle layer: made of copolymer polypropylene and graphene nanosheets, with a thickness of 0.5 mm; 3) Inner layer: made of ethylene-vinyl acetate and polyamide hexa, with a thickness of 0.2 mm. The triazine UV absorber is specifically cyanuric chloride, the organonickel UV quencher is specifically nickel salt, and the phosphite antioxidant is specifically phosphorus trichloride.

[0017] A method for preparing a high-strength, aging-resistant drip irrigation tape, characterized by the following steps: S1: Raw material premixing: Mix the outer layer material, middle layer material and inner layer material evenly, and put them into a high-speed mixer and stir at 80℃ for 15 minutes.

[0018] S2: Three-layer co-extrusion: Using conventional three-layer co-extrusion equipment, the extrusion temperature is set as follows: outer layer 180-190℃, middle layer 190-200℃, inner layer 180-185℃; the melt flow is controlled by the screw speed, and the tube and strip are directly extruded.

[0019] S3: Chemical cross-linking treatment: Immerse the extruded tubing in an ethanol solution of 0.5% peroxide for 10 min, then remove it and cross-link it in an 80℃ hot air circulating oven for 2 h.

[0020] S4: Dropper forming and post-processing: Pre-made droppers are embedded into the tubing using a mechanical nesting process, shaped using a water ring cooling system, and then cut into finished products after processing by a traction machine and a coiling machine.

[0021] Comparative Example The difference between this comparative example and the embodiment is that it uses ordinary drip irrigation tape. The comparison results are as follows

[0022] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An age-resistant, high-strength drip irrigation tape, characterized in that: It comprises the following: copolymer polypropylene, polyamide six, ethylene-vinyl acetate, nano zinc oxide, triazine ultraviolet absorber, organic nickel ultraviolet quenching agent, phosphite antioxidant, graphene nanosheet, and the weight ratio of the drip irrigation tape is as follows: copolymer polypropylene 35 parts, polyamide six 20 parts, ethylene-vinyl acetate 12 parts, nano zinc oxide 6 parts, triazine ultraviolet absorber 0.4 parts, organic nickel ultraviolet quenching agent 0.15 parts, phosphite antioxidant 0.3 parts, and graphene nanosheet 0.8 parts.

2. The high-strength, weatherable, drip irrigation tape of claim 1, wherein: The drip irrigation tape adopts a three-layer co-extrusion composite structure, and each layer is composed of: 1) The outer layer is made of polyamide six, ethylene-vinyl acetate, nano zinc oxide, triazine ultraviolet absorber, organic nickel ultraviolet quenching agent, phosphite antioxidant, and graphene nanosheet, and the thickness is 0.3mm; 2) The middle layer is made of copolymer polypropylene and graphene nanosheet, and the thickness is 0.5mm; 3) The inner layer is made of ethylene-vinyl acetate and polyamide six, and the thickness is 0.2mm.

3. The high-strength, weatherable, drip irrigation tape of claim 1, wherein, The triazine ultraviolet absorber is specifically cyanuric chloride.

4. The high-strength, weather-resistant, drip irrigation tape of claim 1, wherein, The organic nickel ultraviolet quenching agent is specifically nickel salt.

5. The high-strength, weather-resistant, drip irrigation tape of claim 1, wherein, The phosphite antioxidant is specifically phosphorus trichloride.

6. A method of preparing an age-resistant high-strength drip irrigation tape according to any one of claims 1-5, characterized in that: It comprises the following steps: S1: raw material pre-mixing: uniformly mix the outer layer material, middle layer material, and inner layer material, respectively, and respectively put them into a high-speed mixer, stir at 80℃ for 15min; S2: three-layer co-extrusion: use conventional three-layer co-extrusion equipment, set the extrusion temperature: outer layer 180-190℃, middle layer 190-200℃, and inner layer 180-185℃; control the melt flow by screw speed, and directly extrude the pipe belt; S3: chemical crosslinking treatment: immerse the extruded pipe belt in 0.5% peroxide ethanol solution for 10min, and then crosslink it in an 80℃ hot air circulation oven for 2h; S4: dripper forming and post-processing: embed the preformed dripper into the pipe belt through mechanical nesting process, use water ring cooling system to shape, and cut it into finished products after being processed by a traction machine and a crimping machine.

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