Anti-UV anti-aging master batch for pesticide-resistant PE net and preparation method of anti-UV anti-aging master batch

Abstract

The invention discloses an anti-UV and anti-aging master batch for a pesticide-resistant PE net and a preparation method of the anti-UV and anti-aging master batch, the master batch comprises the following components in percentage by mass: 70-80 wt% of matrix resin PE, 2-4 wt% of an anti-UV agent, 1-2 wt% of an antioxidant, 10-15 wt% of a pesticide-resistant agent and 5-12 wt% of an adjuvant, and the invention relates to the technical field of master batches for PE nets. Through scientific and reasonable proportioning, the anti-UV agent, the antioxidant, the pesticide-resistant agent and other additives have a synergistic effect, the pesticide resistance, ultraviolet resistance and aging resistance of the PE net are remarkably improved, uniform distribution of the additives in a PE matrix is guaranteed by using the dispersing agent and the plasticizer, and therefore the overall performance of the master batch is improved, and the service life of the PE net is prolonged. The master batch provided by the invention is suitable for production of various PE nets, and is especially suitable for agricultural protective nets which are used for a long time in high-pesticide and high-ultraviolet environments.

Description

Technical Field

[0001] The invention relates to the technical field of masterbatches for PE nets, in particular to pesticide-resistant UV and anti-aging masterbatches for PE nets and a preparation method thereof. Background Art

[0002] In agricultural production, polyethylene (PE) nets are widely used for insect prevention, bird prevention, wind protection, shading and other purposes. However, the existing PE nets have the following problems in actual use: First, poor pesticide resistance: Pesticides are an indispensable element in agricultural production. However, the chemical components contained in most pesticides have a certain corrosive effect on PE materials, making PE nets prone to degradation after long-term contact with pesticides, resulting in a decrease in its physical properties and a shortened service life. Although some PE nets extend their durability through surface treatment or the addition of antioxidants, the effect is still limited and it is difficult to meet the requirements of long-term use in high-concentration pesticide environments. Second, insufficient UV resistance: PE materials are prone to photodegradation under ultraviolet irradiation, which manifests itself in problems such as brittleness, yellowing, and decreased strength of the material. In order to improve the UV resistance of PE nets, a certain amount of UV inhibitors are usually added during the production process. However, due to the limited types and amounts of UV inhibitors, the stability of existing PE nets in strong ultraviolet environments still needs to be improved. Third, the aging resistance is poor: PE mesh is exposed to the natural environment for a long time and will be affected by factors such as oxygen, ozone, and temperature changes, causing the material to age and lose its original elasticity and strength. In the prior art, although antioxidants and light stabilizers are added to delay the aging process, the effects of these methods are limited and cannot completely solve the aging problem of PE mesh.

[0003] In summary, the existing PE mesh has deficiencies in pesticide resistance, UV resistance and aging resistance. There is an urgent need for a PE mesh material that can be used for a long time in a high pesticide environment and has excellent UV resistance and aging resistance.

[0004] To this end, the present invention provides a pesticide-resistant PE net anti-UV anti-aging masterbatch and a preparation method thereof to solve the above problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a pesticide-resistant UV and anti-aging masterbatch for PE mesh and a preparation method thereof, which solves the above problems.

[0006] To achieve the above objectives, the present invention is implemented by the following technical scheme: an anti-UV anti-aging masterbatch for pesticide-resistant PE mesh, the anti-UV anti-aging masterbatch for pesticide-resistant PE mesh comprising the following components in percentage by mass:

[0007] The base resin PE is 70-80wt%, the anti-UV agent is 2-4wt%, the antioxidant is 1-2wt%, the anti-pesticide agent is 10-15wt%, and the auxiliary agent is 5-12wt%.

[0008] Preferably, the anti-UV agent includes an ultraviolet absorber UV-531 and a light stabilizer Chimassorb944.

[0009] Preferably, the antioxidant comprises a primary antioxidant Irganox 1010 and a secondary antioxidant Irganox168.

[0010] Preferably, the anti-pesticide agent comprises an antioxidant calcium carbonate and an anti-enzyme agent.

[0011] Preferably, the auxiliary agent includes a dispersant, a plasticizer and an antistatic agent.

[0012] Preferably, the dispersant is polyethylene wax, the plasticizer is phthalate, and the antistatic agent is one or more of polyamide-polyether block copolymer, polyolefin-polyether block copolymer or polyacrylate-polyether block copolymer.

[0013] Preferably, the polyethylene wax is Sasol Enhance P20 high melting point polyethylene wax.

[0014] A method for preparing an anti-UV and anti-aging masterbatch for a pesticide-resistant PE net comprises the following steps:

[0015] Step 1: Add the base resin PE, anti-UV agent, antioxidant, anti-pesticide agent and adjuvant into a high-speed mixer according to the ratio scheme. The mixing time is 10-15 minutes to ensure that all components are evenly mixed;

[0016] Step 2: adding the uniformly mixed raw materials into a twin-screw extruder through a feeder for melt blending;

[0017] Step 3: The melt-blended material is extruded through a twin-screw extruder and enters a cooling water tank for cooling. The cooled material is pelletized by a pelletizer to obtain a granular masterbatch;

[0018] Step 4: Dry the cut masterbatch in an oven at 80-100°C for 2-4 hours;

[0019] Step 5: Screen the dried masterbatch to remove impurities and unqualified particles to obtain qualified pesticide-resistant PE mesh anti-UV and anti-aging masterbatch.

[0020] Preferably, in step 2, the speed of the twin-screw extruder is set to 150-200 rpm.

[0021] Preferably, the temperature of each section of the twin-screw extruder in step 2 is set as follows: first section: 160-180°C, second section: 170-190°C, third section: 180-200°C, fourth section: 190-210°C, and head temperature: 200-220°C.

[0022] Beneficial Effects

[0023] The present invention provides a pesticide-resistant UV-resistant and anti-aging masterbatch for PE net and a preparation method thereof. Compared with the prior art, it has the following beneficial effects:

[0024] The invention uses a scientific and reasonable ratio to synergize multiple additives such as anti-UV agents, antioxidants, and anti-pesticide agents, thereby significantly improving the pesticide resistance, ultraviolet resistance, and aging resistance of the PE net. By using a dispersant and a plasticizer, the uniform distribution of each additive in the PE matrix is ​​ensured, thereby improving the overall performance of the masterbatch. The masterbatch of the invention is suitable for the production of various PE nets, and is particularly suitable for agricultural protection nets used for a long time in a high-pesticide and high-ultraviolet environment. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1:

[0027] In this embodiment, a pesticide-resistant PE net anti-UV anti-aging masterbatch includes the following components in percentage by weight:

[0028] Matrix resin PE: 75wt%, UV absorber: 1.5wt%, light stabilizer: 1.5wt%, primary antioxidant: 1wt%, secondary antioxidant: 1wt%, antioxidant: 8wt%, antienzyme agent: 2wt%, dispersant: 2wt%, plasticizer: 2wt%, antistatic agent: 6wt%.

[0029] A pesticide-resistant PE net anti-UV anti-aging masterbatch is prepared by the following method:

[0030] According to the ratio scheme, add the base resin PE, anti-UV agent, antioxidant, anti-pesticide agent and adjuvant into the high-speed mixer for 10-15 minutes to ensure that all components are evenly mixed;

[0031] Step 2: adding the uniformly mixed raw materials into a twin-screw extruder through a feeder for melt blending;

[0032] Step 3: The melt-blended material is extruded through a twin-screw extruder and enters a cooling water tank for cooling. The cooled material is pelletized by a pelletizer to obtain a granular masterbatch;

[0033] Step 4: Dry the cut masterbatch in an oven at 80-100°C for 2-4 hours;

[0034] Step 5: Screen the dried masterbatch to remove impurities and unqualified particles to obtain qualified pesticide-resistant PE mesh anti-UV and anti-aging masterbatch.

[0035] Embodiment 2:

[0036] In this embodiment, a pesticide-resistant PE net anti-UV anti-aging masterbatch includes the following components in percentage by weight:

[0037] Matrix resin PE: 70wt%, UV absorber: 2wt%, light stabilizer: 2wt%, primary antioxidant: 1wt%, secondary antioxidant: 1wt%, antioxidant: 10wt%, antienzyme agent: 3wt%, dispersant: 2wt%, plasticizer: 2wt%, antistatic agent: 7wt%.

[0038] A pesticide-resistant PE net anti-UV anti-aging masterbatch is prepared by the following method:

[0039] According to the ratio scheme, add the base resin PE, anti-UV agent, antioxidant, anti-pesticide agent and adjuvant into the high-speed mixer for 10-15 minutes to ensure that all components are evenly mixed;

[0040] Step 2: adding the uniformly mixed raw materials into a twin-screw extruder through a feeder for melt blending;

[0041] Step 3: The melt-blended material is extruded through a twin-screw extruder and enters a cooling water tank for cooling. The cooled material is pelletized by a pelletizer to obtain a granular masterbatch;

[0042] Step 4: Dry the cut masterbatch in an oven at 80-100°C for 2-4 hours;

[0043] Step 5: Screen the dried masterbatch to remove impurities and unqualified particles to obtain qualified pesticide-resistant PE mesh anti-UV and anti-aging masterbatch.

[0044] Embodiment three:

[0045] In this embodiment, a pesticide-resistant PE net anti-UV anti-aging masterbatch includes the following components in percentage by weight:

[0046] Matrix resin PE: 72wt%, UV absorber: 1.8wt%, light stabilizer: 1.2wt%, primary antioxidant: 1wt%, secondary antioxidant: 1wt%, antioxidant: 10wt%, antienzyme agent: 3wt%, dispersant: 2wt%, plasticizer: 2wt%, antistatic agent: 6wt%.

[0047] A pesticide-resistant PE net anti-UV anti-aging masterbatch is prepared by the following method:

[0048] According to the ratio scheme, add the base resin PE, anti-UV agent, antioxidant, anti-pesticide agent and adjuvant into the high-speed mixer for 10-15 minutes to ensure that all components are evenly mixed;

[0049] Step 2: adding the uniformly mixed raw materials into a twin-screw extruder through a feeder for melt blending;

[0050] Step 3: The melt-blended material is extruded through a twin-screw extruder and enters a cooling water tank for cooling. The cooled material is pelletized by a pelletizer to obtain a granular masterbatch;

[0051] Step 4: Dry the cut masterbatch in an oven at 80-100°C for 2-4 hours;

[0052] Step 5: Screen the dried masterbatch to remove impurities and unqualified particles to obtain qualified pesticide-resistant PE mesh anti-UV and anti-aging masterbatch.

[0053] Embodiment 4:

[0054] In this embodiment, a pesticide-resistant PE net anti-UV anti-aging masterbatch includes the following components in percentage by weight:

[0055] Matrix resin PE: 75wt%, UV absorber: 1wt%, light stabilizer: 1wt%, primary antioxidant: 1wt%, secondary antioxidant: 1wt%, antioxidant: 10wt%, antienzyme agent: 3.5wt%, dispersant: 2wt%, plasticizer: 2wt%, antistatic agent: 3.5wt%.

[0056] A pesticide-resistant PE net anti-UV anti-aging masterbatch is prepared by the following method:

[0057] According to the ratio scheme, add the base resin PE, anti-UV agent, antioxidant, anti-pesticide agent and adjuvant into the high-speed mixer for 10-15 minutes to ensure that all components are evenly mixed;

[0058] Step 2: adding the uniformly mixed raw materials into a twin-screw extruder through a feeder for melt blending;

[0059] Step 3: The melt-blended material is extruded through a twin-screw extruder and enters a cooling water tank for cooling. The cooled material is pelletized by a pelletizer to obtain a granular masterbatch;

[0060] Step 4: Dry the cut masterbatch in an oven at 80-100°C for 2-4 hours;

[0061] Step 5: Screen the dried masterbatch to remove impurities and unqualified particles to obtain qualified pesticide-resistant PE mesh anti-UV and anti-aging masterbatch.

[0062] Embodiment five:

[0063] In this embodiment, a pesticide-resistant PE net anti-UV anti-aging masterbatch includes the following components in percentage by weight:

[0064] Base resin PE: 80wt%, UV absorber: 1wt%, light stabilizer: 1wt%, primary antioxidant: 1wt%, secondary antioxidant: 1wt%, antioxidant: 8wt%, antienzyme agent: 2wt%, dispersant: 2wt%, plasticizer: 2wt%, antistatic agent: 2wt%.

[0065] A pesticide-resistant PE net anti-UV anti-aging masterbatch is prepared by the following method:

[0066] According to the ratio scheme, add the base resin PE, anti-UV agent, antioxidant, anti-pesticide agent and adjuvant into the high-speed mixer for 10-15 minutes to ensure that all components are evenly mixed;

[0067] Step 2: adding the uniformly mixed raw materials into a twin-screw extruder through a feeder for melt blending;

[0068] Step 3: The melt-blended material is extruded through a twin-screw extruder and enters a cooling water tank for cooling. The cooled material is pelletized by a pelletizer to obtain a granular masterbatch;

[0069] Step 4: Dry the cut masterbatch in an oven at 80-100°C for 2-4 hours;

[0070] Step 5: Screen the dried masterbatch to remove impurities and unqualified particles to obtain qualified pesticide-resistant PE mesh anti-UV and anti-aging masterbatch.

[0071] Embodiment six:

[0072] In this embodiment, a pesticide-resistant PE net anti-UV anti-aging masterbatch includes the following components in percentage by weight:

[0073] Matrix resin PE: 78wt%, UV absorber: 1.5wt%, light stabilizer: 1.5wt%, primary antioxidant: 1wt%, secondary antioxidant: 1wt%, antioxidant: 10wt%, antienzyme agent: 2wt%, dispersant: 2wt%, plasticizer: 2wt%, antistatic agent: 1wt%.

[0074] A pesticide-resistant PE net anti-UV anti-aging masterbatch is prepared by the following method:

[0075] According to the ratio scheme, add the base resin PE, anti-UV agent, antioxidant, anti-pesticide agent and adjuvant into the high-speed mixer for 10-15 minutes to ensure that all components are evenly mixed;

[0076] Step 2: adding the uniformly mixed raw materials into a twin-screw extruder through a feeder for melt blending;

[0077] Step 3: The melt-blended material is extruded through a twin-screw extruder and enters a cooling water tank for cooling. The cooled material is pelletized by a pelletizer to obtain a granular masterbatch;

[0078] Step 4: Dry the cut masterbatch in an oven at 80-100°C for 2-4 hours;

[0079] Step 5: Screen the dried masterbatch to remove impurities and unqualified particles to obtain qualified pesticide-resistant PE mesh anti-UV and anti-aging masterbatch.

[0080] Embodiment seven:

[0081] In this embodiment, a pesticide-resistant PE net anti-UV anti-aging masterbatch includes the following components in percentage by weight:

[0082] Matrix resin PE: 77wt%, UV absorber: 1wt%, light stabilizer: 1.5wt%, primary antioxidant: 1wt%, secondary antioxidant: 1wt%, antioxidant: 10wt%, antienzyme agent: 2wt%, dispersant: 2wt%, plasticizer: 2wt%, antistatic agent: 2.5wt%.

[0083] A pesticide-resistant PE net anti-UV anti-aging masterbatch is prepared by the following method:

[0084] According to the ratio scheme, add the base resin PE, anti-UV agent, antioxidant, anti-pesticide agent and adjuvant into the high-speed mixer for 10-15 minutes to ensure that all components are evenly mixed;

[0085] Step 2: adding the uniformly mixed raw materials into a twin-screw extruder through a feeder for melt blending;

[0086] Step 3: The melt-blended material is extruded through a twin-screw extruder and enters a cooling water tank for cooling. The cooled material is pelletized by a pelletizer to obtain a granular masterbatch;

[0087] Step 4: Dry the cut masterbatch in an oven at 80-100°C for 2-4 hours;

[0088] Step 5: Screen the dried masterbatch to remove impurities and unqualified particles to obtain qualified pesticide-resistant PE mesh anti-UV and anti-aging masterbatch.

[0089] Comparative Example 1:

[0090] The masterbatch includes the following components in percentage by weight:

[0091] Base resin PE: 90wt%, UV absorber: 1wt%, light stabilizer: 1wt%, primary antioxidant: 1wt%, secondary antioxidant: 1wt%, dispersant: 2wt%, plasticizer: 2wt%, antistatic agent: 2wt%.

[0092] Prepared by the following method:

[0093] According to the ratio scheme, add the base resin PE, anti-UV agent, antioxidant, anti-pesticide agent and adjuvant into the high-speed mixer for 10-15 minutes to ensure that all components are evenly mixed;

[0094] Step 2: adding the uniformly mixed raw materials into a twin-screw extruder through a feeder for melt blending;

[0095] Step 3: The melt-blended material is extruded through a twin-screw extruder and enters a cooling water tank for cooling. The cooled material is pelletized by a pelletizer to obtain a granular masterbatch;

[0096] Step 4: Dry the cut masterbatch in an oven at 80-100°C for 2-4 hours;

[0097] Step 5: Screen the dried masterbatch to remove impurities and unqualified particles to obtain qualified masterbatch.

[0098] Comparative Example 2:

[0099] The masterbatch includes the following components in percentage by weight:

[0100] Base resin PE: 85wt%, UV absorber: 1.5wt%, light stabilizer: 1.5wt%, primary antioxidant: 0.5wt%, secondary antioxidant: 0.5wt%, antioxidant: 5wt%, dispersant: 2wt%, plasticizer: 2wt%, antistatic agent: 2wt%.

[0101] Prepared by the following method:

[0102] According to the ratio scheme, add the base resin PE, anti-UV agent, antioxidant, anti-pesticide agent and adjuvant into the high-speed mixer for 10-15 minutes to ensure that all components are evenly mixed;

[0103] Step 2: adding the uniformly mixed raw materials into a twin-screw extruder through a feeder for melt blending;

[0104] Step 3: The melt-blended material is extruded through a twin-screw extruder and enters a cooling water tank for cooling. The cooled material is pelletized by a pelletizer to obtain a granular masterbatch;

[0105] Step 4: Dry the cut masterbatch in an oven at 80-100°C for 2-4 hours;

[0106] Step 5: Screen the dried masterbatch to remove impurities and unqualified particles to obtain qualified masterbatch.

[0107] In order to verify the performance of the improved masterbatch, the following tests were performed on the masterbatch of each embodiment and comparative example: Pesticide resistance test:

[0108] 1. Soak the PE mesh sample made of masterbatch in a common pesticide solution and observe the changes in its physical properties (such as strength and toughness) over a certain period of time.

[0109] 2. Anti-ultraviolet test: Use a UV aging tester to irradiate the PE mesh sample with ultraviolet light to test its aging degree (such as color change, strength decrease) within a specific period of time.

[0110] 3. Aging resistance test: Expose the PE mesh samples to the natural environment and regularly measure changes in their physical properties (such as tensile strength and elongation at break).

[0111] This test mainly tests its strength. The test results are shown in Table 1:

[0112] Table 1: Strength test results of PE mesh samples prepared in Examples 1 to 7 and Comparative Examples 1 to 2

[0113]

[0114] Each embodiment maintains a high strength in the pesticide solution and shows significant pesticide resistance, which is due to the reasonable ratio of the antioxidant and the anti-enzyme agent, which effectively neutralizes the acidic components and enzyme substances in the pesticide.

[0115] Comparative Examples 1 and 2 lacked anti-enzyme agents and insufficient antioxidant content, resulting in a rapid decrease in strength in a pesticide environment. The UV resistance of each embodiment is significantly better than that of the comparative example, maintaining a relatively high strength. This is attributed to the reasonable ratio of ultraviolet absorbers and light stabilizers, which effectively blocked the damage of ultraviolet rays to PE materials. In the comparative example, due to the insufficient content of anti-UV agents, the strength of the material decreased rapidly under ultraviolet irradiation. The aging performance of each embodiment in a natural environment is significantly better than that of the comparative example, maintaining a relatively high strength. This is due to the reasonable ratio of primary and secondary antioxidants, which provide comprehensive antioxidant protection. In the comparative example, due to the low content of antioxidants, the material aged faster in a natural environment and the strength decreased significantly.

[0116] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0117] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0118] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pesticide-resistant PE net anti-UV anti-aging masterbatch, characterized by: The pesticide-resistant PE net anti-UV anti-aging masterbatch comprises the following components in percentage by weight: The base resin PE is 70-80wt%, the anti-UV agent is 2-4wt%, the antioxidant is 1-2wt%, the anti-pesticide agent is 10-15wt%, and the auxiliary agent is 5-12wt%.

2. The anti-UV and anti-aging masterbatch for pesticide-resistant PE net according to claim 1, characterized in that: The anti-UV agent includes an ultraviolet absorber UV-531 and a light stabilizer Chimassorb 944.

3. The anti-UV and anti-aging masterbatch for pesticide-resistant PE net according to claim 1, characterized in that: The antioxidants include a primary antioxidant Irganox 1010 and a secondary antioxidant Irganox 168.

4. The anti-UV and anti-aging masterbatch for pesticide-resistant PE net according to claim 1, characterized in that: The anti-pesticide agent includes an antioxidant calcium carbonate and an anti-enzyme agent.

5. The anti-UV and anti-aging masterbatch for pesticide-resistant PE net according to claim 1, characterized in that: The auxiliary agents include dispersants, plasticizers and antistatic agents.

6. The anti-UV and anti-aging masterbatch for pesticide-resistant PE net according to claim 5, characterized in that: The dispersant is polyethylene wax, the plasticizer is phthalate, and the antistatic agent is one or more of polyamide-polyether block copolymer, polyolefin-polyether block copolymer or polyacrylate-polyether block copolymer.

7. The anti-UV and anti-aging masterbatch for pesticide-resistant PE net according to claim 5, characterized in that: The polyethylene wax is Sasol Enhance P20 high melting point polyethylene wax.

8. A method for preparing an anti-UV and anti-aging masterbatch for a pesticide-resistant PE net, characterized in that: The following steps are involved: Step 1: Add the base resin PE, anti-UV agent, antioxidant, anti-pesticide agent and adjuvant into a high-speed mixer according to the ratio scheme. The mixing time is 10-15 minutes to ensure that all components are evenly mixed; Step 2: adding the uniformly mixed raw materials into a twin-screw extruder through a feeder for melt blending; Step 3: The melt-blended material is extruded through a twin-screw extruder and enters a cooling water tank for cooling. The cooled material is pelletized by a pelletizer to obtain a granular masterbatch; Step 4: Dry the cut masterbatch in an oven at 80-100°C for 2-4 hours; Step 5: Screen the dried masterbatch to remove impurities and unqualified particles to obtain qualified pesticide-resistant PE mesh anti-UV and anti-aging masterbatch.

9. The method for preparing the anti-UV and anti-aging masterbatch for pesticide-resistant PE net according to claim 8, characterized in that: In the step 2, the speed of the twin-screw extruder is set to 150-200 rpm.

10. The method for preparing the anti-UV and anti-aging masterbatch for pesticide-resistant PE net according to claim 8, characterized in that: In the step 2, the temperature of each section of the twin-screw extruder is set to: first section: 160-180°C, second section: 170-190°C, third section: 180-200°C, fourth section: 190-210°C, head temperature: 200-220°C.

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