阅读说明：本技术 一种农药盛装容器及其制备方法 (Pesticide container and preparation method thereof ) 是由 冯秋锋 金登全 蒋全俊 于 2020-07-02 设计创作，主要内容包括：本申请公开了一种农药盛装容器及其制备方法。所述盛装容器的器壁由内至外依次包括内衬层、复合层和表层,其中,所述内衬层包括重量比为(40～50):(30～40):(10～15):(7～10):(3～7):(2～5)的聚酰胺、聚丙烯、柠檬酸三乙酯、甘油酸改性SiO<Sub>2</Sub>、二苯醚和巴西棕榈蜡,所述复合层包括重量比为(55～62):(27～35):(5～10):(4～8)的低密度聚乙烯、聚乙烯醇、三聚氰胺和季戊四醇四硬脂酸酯,以及所述表层包括重量比为(35～45):(33～38):(15～20):(12～16):(7～10):(3～5):(1～2)的高密度聚乙烯、ABS、滑石粉、TiO<Sub>2</Sub>、山梨醇、聚乙烯吡咯烷酮和紫外吸收剂。所述盛装容器具有优异的密封性、抗渗透性、抗老化性、耐腐蚀性、机械强度、抗冲击性、稳定性、阻燃性等。(The application discloses a pesticide container and a preparation method thereof. The container wall of the container sequentially comprises an inner liner layer, a composite layer and a surface layer from inside to outside, wherein the inner liner layer comprises polyamide, polypropylene, triethyl citrate and glyceric acid modified SiO (2-5) in a weight ratio of (40-50): 30-40): 10-15): 7-10: (3-7): 2-5 2 Diphenyl ether and carnauba wax, wherein the composite layer comprises (55-62): (27-35): 5-10): 4-E8) The surface layer comprises 35-45 wt% (weight ratio) to 33-38 wt% (weight ratio) to 15-20 wt% (weight ratio) to 12-16 wt% (weight ratio) to 7-10 wt% (weight ratio) to 3-5 wt% (weight ratio) of high-density polyethylene, ABS, talcum powder, TiO, and polyethylene stearate, and the surface layer comprises 2 Sorbitol, polyvinylpyrrolidone and an ultraviolet absorber. The container has excellent sealability, permeation resistance, aging resistance, corrosion resistance, mechanical strength, impact resistance, stability, flame retardancy, and the like.)

1. A pesticide container is characterized in that a container wall of the container sequentially comprises an inner liner layer, a composite layer and a surface layer from inside to outside, wherein the inner liner layer comprises polyamide, polypropylene, triethyl citrate and glyceric acid modified SiO (2-5) in a weight ratio of (40-50): 30-40): 10-15): 7-10): 3-7: (40-5) ₂The composite layer comprises low-density polyethylene, polyvinyl alcohol, melamine and pentaerythritol tetrastearate in a weight ratio of (55-62): (27-35): 5-10): 4-8, and the surface layer comprises high-density polyethylene, ABS, talcum powder, TiO and the like in a weight ratio of (35-45): 33-38): 15-20): 12-16): 7-10): 3-5): 1-2₂Sorbitol, polyvinylpyrrolidone and an ultraviolet absorber.

2. A pesticide container as set forth in claim 1 wherein the inner liner comprises polyamide, polypropylene, triethyl citrate, glycerate-modified SiO, in a weight ratio of (43-46): 35-37): 12-15): 8-9): 5-6: (4-5): by weight: (43-46): by weight: (35-37): by weight: (5-15): by weight: (5-6): by weight: (4-5): by weight: (4₂Diphenyl ether and BrazilPalm wax.

3. A pesticide container as set forth in claim 1 wherein the composite layer comprises low density polyethylene, polyvinyl alcohol, melamine and pentaerythritol tetrastearate in a weight ratio of (58-60): 30-33): 7-9): 5-6.

4. A container as claimed in claim 1, wherein the surface layer comprises High Density Polyethylene (HDPE), ABS, talc, TiO, in weight ratios (38-40: 35-36: 16-18: 14-15: 8-9: 4-5: 1-2) ₂Sorbitol, polyvinylpyrrolidone and an ultraviolet absorber.

5. The container as claimed in claim 1, wherein the glyceric acid-modified SiO is₂The preparation method comprises the following steps: mixing SiO₂Dispersing and stirring with 10% sulfuric acid for 15-20 minutes, filtering and drying, mixing with absolute ethyl alcohol to prepare a dispersion liquid with the concentration of 3-5 wt%, adding a silane coupling agent, stirring at 55-60 ℃ for 40-50 minutes, adding glyceric acid, stearyl alcohol and sodium dodecyl sulfate, stirring at 70-75 ℃ for 100-120 minutes, filtering and drying, wherein SiO is₂The weight ratio of the silane coupling agent to the glyceric acid to the stearyl alcohol to the sodium dodecyl sulfate is 100 (5-7): 20-25): 5-7): 2-3.

6. The container as claimed in claim 5, wherein said silane coupling agent is KH 550.

7. The pesticide containing container of claim 1, wherein the ultraviolet absorber is UV-531.

8. A pesticide container as set forth in claim 1, wherein the container wall has a thickness of 0.1-100 mm, and the thickness ratio of the inner liner layer, the composite layer and the surface layer is (20-33%) (7-10%): (60-70%).

9. A method of manufacturing a pesticide containing vessel as claimed in any one of claims 1 to 8, comprising the steps of:

(1) heating and melting the components of the inner lining layer at 215-225 ℃, compacting by a first screw rod and extruding;

(2) heating and melting the components of the composite layer at 200-210 ℃, compacting by a second screw and extruding;

(3) heating and melting the surface layer components at 220-230 ℃, compacting by a third screw and extruding; and

(4) and (3) simultaneously extruding the melts obtained in the steps (1), (2) and (3) at a constant speed, compounding the melts by a die head to form a blank, and then performing blow molding.

10. The method according to claim 9, wherein the rotation speed of the first screw is 25 to 35rpm, the rotation speed of the second screw is 10 to 15rpm, and the rotation speed of the third screw is 65 to 70 rpm.

Technical Field

The application relates to the field of coatings, in particular to a pesticide containing container and a preparation method thereof.

Background

The pesticide refers to a substance or a mixture of several substances and a preparation thereof, wherein the substance or the mixture is used for preventing, killing or controlling diseases, insects, grass and other pests which damage agriculture and forestry, and purposefully regulating, controlling and influencing the metabolism, growth, development and reproduction processes of plants and pests, and is derived from organisms, other natural products and produced by applying biotechnology. It follows that pesticides are concepts divided by their use, and their chemical composition can cover a large number of compound classes, and thus their properties vary widely, and vary greatly, for example, pesticides can be pH-acidic, basic, neutral, photolabile, thermolabile, corrosive, chemically active, and the like, but not necessarily.

As is known, China is a big agricultural country, pesticides are indispensable parts in agricultural production, the annual output of the pesticides in China is huge currently, two thirds of the pesticides are liquid formulations, the liquid pesticides can simplify the using steps, and the liquid pesticides can be sprayed on crops after being diluted when in use. Common pesticide preparations comprise bactericides, insecticides, herbicides and the like, are high in concentration and toxic, and have great harm to human bodies. Therefore, the safety of pesticide containing and transportation is very important, the traditional packaging mode for liquid pesticide is to adopt a glass bottle for containing, and although the glass bottle has good anti-permeability, the glass bottle has the defects of easiness in damage, high cost, great weight, untight sealing of an inner plug and the like, so that a great deal of inconvenience is brought to production, transportation and use, and great potential safety hazards exist.

In contrast, at present, part of liquid pesticides has gradually started to be contained in plastic containers, which puts high requirements on the materials of the plastic containers, such as excellent sealing property, permeation resistance, aging resistance, corrosion resistance, mechanical strength, stability and the like. There is still considerable room for improvement in the above-described properties of current pesticide containment vessels.

Disclosure of Invention

[ problem ] to

In view of the disadvantages of the prior art, an object of the present application is to provide a pesticide container, which can be a bottle, a barrel, etc., and has excellent performance in sealing property, permeation resistance, aging resistance, corrosion resistance, mechanical strength, impact resistance, stability, flame retardancy, etc.

Another object of the present invention is to provide a method for manufacturing the container for holding agricultural chemicals, which comprises mixing the raw material components sufficiently and simultaneously extruding the mixture to obtain a container for holding agricultural chemicals having excellent properties.

[ solution ]

In order to achieve the above object, according to one embodiment of the present application, there is provided a pesticide container, a wall of the container sequentially includes an inner liner layer, a composite layer and a surface layer from inside to outside, wherein the inner liner layer includes polyamide, polypropylene, triethyl citrate, glyceric acid modified SiO, and a weight ratio of (40-50): 30-40): 10-15): 7-10): 3-7): 2-5 ₂The composite layer comprises low-density polyethylene (LDPE), polyvinyl alcohol (PVA), melamine and pentaerythritol tetrastearate in a weight ratio of (55-62): (27-35): 5-10): 4-8, and the surface layer comprises high-density polyethylene (HDPE), ABS, talcum powder, TiO in a weight ratio of (35-45): 33-38): 15-20): 12-16): 7-10): 3-5): 1-2₂Sorbitol, polyvinylpyrrolidone and an ultraviolet absorber.

In the application, the wall of pesticide splendid attire container includes inner liner, composite bed and top layer etc. wherein, the inner liner adopts triethyl citrate and glyceric acid modified SiO of specific quantity₂The inner liner layer has extremely excellent sealing property, permeability resistance, flexibility, corrosion resistance, stability and the like, and can effectively block pesticides and prevent the pesticides from permeating when the inner liner layer is in direct contact with the pesticides. The surface layer is the outermost side of the pesticide container, HDPE and ABS are used as main components, and sorbitol and polyvinylpyrrolidone are added to endow HDPE and ABS with good compatibility, so that the compatibility is improved Mechanical strength, and can also improve talc powder and TiO₂The surface layer has high mechanical strength to maintain the shape of the container, excellent flame retardancy and ultraviolet resistance, and a certain barrier property to prevent the penetration of oxygen and moisture in the air. However, the inner liner and the skin layer are not well combined, so that the present application introduces a composite layer to combine the inner liner and the skin layer, the composite layer has good adhesion and compatibility with the inner liner and the skin layer, so that the three are combined into a whole, will not peel off even when subjected to a large impact, and exhibit respective advantages and disadvantages. In addition, such a multilayer composite structure also imparts excellent impact resistance to the container, and is also less likely to break upon receiving a large mechanical impact.

Further, the lining layer comprises polyamide, polypropylene, triethyl citrate, glyceric acid modified SiO (SiO) in the weight ratio of (43-46): 35-37): 12-15): 8-9): 5-6): 4-5₂Diphenyl ether and carnauba wax. Within the above range, the inner liner may have more excellent permeation resistance, corrosion resistance, stability, and the like.

Further, the composite layer comprises low-density polyethylene (LDPE), polyvinyl alcohol, melamine and pentaerythritol tetrastearate in a weight ratio of (58-60): (30-33): 7-9): 5-6. Within the above range, the composite layer can better combine the inner liner layer and the surface layer.

Further, the surface layer comprises (38-40): (35-36): 16-18): 14-15): 8-9): 4-5): 1-2 weight ratio of High Density Polyethylene (HDPE), ABS, talcum powder, TiO₂Sorbitol, polyvinylpyrrolidone and an ultraviolet absorber. Within the above range, the skin layer may have higher mechanical strength and impact resistance.

Further, the glyceric acid modified SiO₂The preparation method comprises the following steps: mixing SiO₂Dispersing and stirring the mixture for 15 to 20 minutes by using 10 percent sulfuric acid, filtering and drying the mixture, and then mixing the mixture with absolute ethyl alcohol to obtain the mixture with the concentration of 3 to 5 weight percentAdding a silane coupling agent into the dispersion, stirring for 40-50 minutes at 55-60 ℃, then adding glyceric acid, stearyl alcohol and sodium dodecyl sulfate, stirring for 100-120 minutes at 70-75 ℃, filtering and drying, wherein SiO is₂The weight ratio of the silane coupling agent to the glyceric acid to the stearyl alcohol to the sodium dodecyl sulfate is 100 (5-7): 20-25): 5-7): 2-3. In the present application, the SiO is first activated with a silane coupling agent ₂Then glyceric acid is introduced under the coordination of stearyl alcohol and sodium dodecyl sulfate, thereby obtaining glyceric acid modified SiO₂The composite material has better reaction activity, can be firstly reacted and coupled with triethyl citrate, and then is mutually interwoven and hooked with polyamide and polypropylene, so that the affinity and compatibility between the polyamide and the polypropylene are greatly improved, the molecular arrangement of the polyamide and the polypropylene is compact, and a compact inner lining layer is formed, therefore, the composite material has excellent sealing property and permeability resistance.

Further, the silane coupling agent may be KH 550.

Further, the ultraviolet absorber may be UV-531 (2-hydroxy-4-n-octoxybenzophenone). Which can effectively impart ultraviolet resistance to the surface layer.

In addition, the thickness of the container wall of the container can be 0.1-100 mm, preferably 0.5-10 mm, more preferably 1.0-5.0 mm, and the thickness ratio of the inner liner layer, the composite layer and the surface layer can be (20-33%) (7-10%) (60-70%), preferably 25%: 10%: 65%. Under this thickness proportion relation, the pesticide splendid attire container of this application can well balance resistance to penetration, performance such as intensity.

According to another embodiment of the present application, there is provided a method for preparing the above-mentioned pesticide container, which includes the steps of:

(1) Heating and melting the components of the inner lining layer at 215-225 ℃, compacting by a first screw rod and extruding;

(2) heating and melting the components of the composite layer at 200-210 ℃, compacting by a second screw and extruding;

(3) heating and melting the surface layer components at 220-230 ℃, compacting by a third screw and extruding; and

(4) and (3) simultaneously extruding the melts obtained in the steps (1), (2) and (3) at a constant speed, compounding the melts by a die head to form a blank, and then performing blow molding.

According to the preparation method, the components can be effectively melted and mixed, and finally the pesticide container with excellent performance is prepared.

Further, in the preparation method, the rotation speed of the first screw may be 25 to 35rpm, preferably 30rpm, the rotation speed of the second screw may be 10 to 15rpm, preferably 13rpm, and the rotation speed of the third screw may be 65 to 70rpm, preferably 68 rpm.

In the application, by further limiting the rotating speed of each screw, the inner liner, the composite layer and the surface layer with required thickness proportion can be obtained, and then the pesticide containing container can be obtained by blow molding.

[ advantageous effects ]

In summary, the present application has the following beneficial effects:

The pesticide containing container has the advantages that the pesticide containing container has excellent sealing performance, permeability resistance, ageing resistance, corrosion resistance, mechanical strength, impact resistance, stability, flame retardance and the like, so that various pesticide agents can be contained without reacting with the pesticide containing container, and the excellent barrier performance of the container can prevent the pesticide from seeping out to cause environmental pollution and harm and can prevent external oxygen and moisture from entering to influence the storage of the pesticide. Moreover, the excellent mechanical strength and impact resistance of the container also greatly reduces the breakage of the container during storage and transportation of the pesticide.

In addition, according to the preparation method of the pesticide container, the raw material components can be fully mixed and synchronously extruded and molded, so that the pesticide container with excellent performance is obtained.

Detailed Description

In order that those skilled in the art can more clearly understand the present application, the present application will be described in further detail with reference to the following examples, but it should be understood that the following examples are only preferred embodiments of the present application, and the scope of the present application as claimed is not limited thereto.

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