Breathable plastic flowerpot and manufacturing method thereof

Abstract

The invention relates to a breathable plastic flowerpot and a manufacturing method thereof.The manufacturing method comprises the steps that plastic particles and mixed plant fibers are fully mixed according to the weight ratio of (5-7): (3-5) to obtain a mixture, and the mixed plant fibers comprise modified plant fibers and non-modified plant fibers; injecting the mixture into a flowerpot mold through an extruder, and cooling to obtain a flowerpot blank; the upper portions of the inner side wall and the outer side wall of the flowerpot blank are polished, and the mixed plant fibers are exposed out of the polished positions. The mixed plant fibers are added, and the modified plant fibers are good in compatibility with plastic and tight in connection, so that the mechanical property of the plastic flowerpot is enhanced; the air gaps in the flowerpot body are increased by utilizing the poor compatibility of the non-modified plant fibers and the plastic and the cavities at the joints, so that the air permeability of the plastic flowerpot is further improved; the boss is arranged at the bottom of the flowerpot body, and a water storage position can be formed at the bottom of the flowerpot body in combination with the waterproof layer, so that the watering frequency is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic flowerpots, and in particular to a breathable plastic flowerpot and a manufacturing method thereof. Background Art

[0002] With the progress of society, a large number of flowers and plants are placed in homes, offices and other places, and the growth of these flowers and plants is inseparable from flowerpots. According to different materials, flowerpots can be divided into ceramic flowerpots, wooden flowerpots and plastic flowerpots. Plastic flowerpots have been widely used due to their light texture, easy processing and diverse colors.

[0003] However, because the material of plastic flowerpots is not breathable, it is not conducive to the respiration of the roots, and it is easy to cause waterlogging and root rot, which affects the growth of flowers and plants. Most of the existing plastic flowerpots improve the air permeability of plastic flowerpots by opening air holes on the side walls of plastic flowerpots. However, the opening of air holes will cause the outflow of muddy water during watering, pollute the external environment and affect the appearance of the flowerpots.

[0004] Based on the above technical problems, the present application proposes a breathable plastic flowerpot and a manufacturing method thereof. Summary of the Invention

[0005] The purpose of the present invention is to provide a breathable plastic flowerpot and a manufacturing method thereof to solve the technical problems mentioned in the background art. The purpose of the present invention is achieved through the following technical solutions: A breathable plastic flowerpot includes a flowerpot body made of plastic material. Plant fibers are mixed in the flowerpot body, and air-permeable channels communicating between the inner wall and the outer wall of the flowerpot body are formed between the plant fibers; a waterproof layer is provided on the outer surface of the flowerpot body, and the waterproof layer covers the bottom and the lower part of the side surface of the flowerpot body.

[0006] Further, a convex platform is provided at the bottom of the flowerpot body, and the height of the convex platform is greater than the height of the waterproof layer on the side surface of the flowerpot body.

[0007] Further, the convex platform is an annular convex platform, and a plurality of annular convex platforms are coaxially arranged at the bottom of the flowerpot body.

[0008] Further, a mesh plate is placed on the convex platform.

[0009] A manufacturing method of any of the above breathable plastic flowerpots includes the following steps: Step S1: Mix plastic particles and mixed plant fibers in a weight ratio of 5-7:3-5 to obtain a mixture. The mixed plant fibers include modified plant fibers and unmodified plant fibers; Step S2: Inject the mixture into a flowerpot mold through an extruder, and obtain a flowerpot embryo after cooling; Step S3: Polish the upper parts of the inner and outer walls of the flowerpot embryo so that the polished positions expose the mixed plant fibers.

[0010] Further, the preparation method of the modified plant fibers in Step S1 includes: Step S11: Immerse the unmodified plant fibers in a sodium hydroxide solution with a concentration of 3% for 24 hours. Step S12: Take out the soaked unmodified plant fibers and wash them until the pH of the water after washing is 7 - 8. Step S13: Dry the washed unmodified plant fibers at 120 - 160 °C for 18 hours to obtain the modified plant fibers.

[0011] Further, the extrusion temperature of the extruder is 170 - 190 °C.

[0012] Further, the plastic particles are one of PE particles, PP particles, PVC particles or ABS particles.

[0013] Further, the unmodified plant fibers are one of bamboo fibers, wood fibers or hemp fibers.

[0014] Further, the unmodified plant fibers account for 30% - 50% of the mixed plant fibers.

[0015] The technical solution provided by the embodiment of the present application has at least the following technical effects or advantages: 1. By mixing plant fibers into the plastic particles and polishing after molding to expose the plant fibers on the inner and outer surfaces of the flowerpot body, a three-dimensional plant fiber network communicating with the inner and outer surfaces of the flowerpot body is formed inside the flowerpot body, thereby improving the air permeability of the plastic flowerpot. 2. By adding mixed plant fibers, using the good compatibility and tight connection between the modified plant fibers and the plastic to enhance the mechanical properties of the plastic flowerpot; using the poor compatibility between the unmodified plant fibers and the plastic with cavities at the joints to increase the air gaps in the flowerpot body, further improving the air permeability of the plastic flowerpot. 3. By only polishing the upper parts of the inner and outer walls of the flowerpot body, the bottom and lower parts of the flowerpot body are still wrapped by plastic to form a waterproof layer, thus preventing the water in the plastic flowerpot from seeping out along the plant fibers and ensuring the cleanliness and beauty of the outside of the plastic flowerpot. 4. By setting a convex platform at the bottom of the flowerpot body and combining with the waterproof layer, a water storage position can be formed at the bottom of the flowerpot body, thereby reducing the frequency of watering. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the appearance of the plastic flowerpot in the embodiment of the present application; Figure 2 Cross-sectional view of the plastic flowerpot in the embodiment of the present application.

[0018] Reference numerals: 1, flowerpot body; 11, waterproof layer; 12, annular boss; 2, mesh plate. Detailed implementation manners

[0019] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following will, in conjunction with the accompanying drawings and preferred embodiments, describe in detail the specific implementation manners, structures, features and their effects of the present invention as follows.

[0020] Embodiment 1 As Figure 1 、 Figure 2 shown, a breathable plastic flowerpot includes a flowerpot body 1. The flowerpot body 1 is a barrel-shaped body with an open upper part obtained by plastic injection molding. The flowerpot body 1 can be cylindrical or square-barreled. Plant fibers are mixed in the plastic of the flowerpot body 1, and the plant fibers form a three-dimensional network communicating with the inner wall and the outer wall of the flowerpot body 1, so as to form a breathable channel between the inner wall and the outer wall of the flowerpot body 1, thereby improving the breathability of the plastic flowerpot.

[0021] As Figure 1 、 Figure 2 shown, a waterproof layer 11 is provided on the outer surface of the flowerpot body 1, and the waterproof layer 11 covers the bottom and the lower part of the side surface of the flowerpot body 1. Two annular bosses 12 are integrally formed on the bottom of the flowerpot body 1. The annular bosses 12 are concentrically arranged with the center of the bottom of the flowerpot body 1, and the height of the annular bosses 12 is greater than the height of the waterproof layer 11 on the side surface of the flowerpot body 1. Under the action of the waterproof layer 11, a water storage space can be formed between the annular bosses 12, between the annular bosses 12 and the inner wall of the flowerpot body 1, thereby reducing the watering frequency of the flowers and plants. Since the annular bosses 12 are higher than the waterproof layer 11, the excess water can slowly seep out through the plant fiber network, thereby avoiding the phenomenon of root rot caused by water accumulation inside the plastic flowerpot. Preferably, a mesh plate 2 is placed on the annular bosses 12 to prevent the roots of the flowers and plants from extending into the water storage space.

[0022] Embodiment 2 A method for manufacturing a breathable plastic flower pot in embodiment 1 comprises the following steps: Step S1, putting plastic particles and mixed plant fibers into a mixer in a weight ratio of 5-7:3-5 and fully mixing to obtain a mixture. Wherein, the plastic particles are one of PE particles, PP particles, PVC particles or ABS particles. The mixed plant fibers include modified plant fibers and unmodified plant fibers, the modified plant fibers are obtained by modifying unmodified plant fibers, the unmodified plant fibers are one of bamboo fibers, wood fibers or hemp fibers, and the unmodified plant fibers account for 30-50% of the mixed plant fibers. By adjusting the ratio of mixed plant fibers to plastic particles and the proportion of unmodified plant fibers in the mixed plant fibers, the porosity of the plastic flower pot can be adjusted. The greater the proportion of mixed plant fibers to plastic particles and the greater the proportion of unmodified plant fibers to mixed plant fibers, the higher the porosity of the plastic flower pot, the better the air permeability, but the worse the structural strength. Preferably, the ratio of plastic particles to mixed plant fibers is 6:4, and unmodified plant fibers account for 40% of the mixed plant fibers.

[0023] The preparation method of the modified plant fiber comprises: Step S11, soaking the non-modified plant fiber in a 3% sodium hydroxide solution for 24 hours; Step S12, taking out the soaked non-modified plant fiber and washing it with clean water until the pH of the washed water is 7-8; Step S13, placing the cleaned non-modified plant fiber into an oven, and drying at 120-160° C. for 18 hours to obtain modified plant fiber.

[0024] After the modified plant fiber is treated with sodium hydroxide, the impurities such as pectin and hemicellulose in the fiber are removed, making the modified plant fiber more thermally stable. At the same time, the removal of impurities in the fiber makes the fiber have more void structures, increases the specific surface area, improves the bonding ability with the plastic matrix, and improves the mechanical properties. However, the unmodified plant fiber that has not been modified has poor compatibility with the plastic matrix, resulting in a clear boundary between the fiber and the plastic body, thereby forming more cavities, increasing the air gap in the plastic flower pot, and further improving the air permeability of the plastic flower pot.

[0025] Step S2, injecting the mixture into a flower pot mold through an extruder, and obtaining a flower pot embryo after cooling; wherein the extrusion temperature of the extruder is 180° C. At this temperature, the impact resistance and tensile strength of the plastic flower pot are optimal, and the mixed plant fibers will not be carbonized.

[0026] Step S3, grinding the upper part of the inner and outer walls of the flower pot embryo body so that the mixed plant fibers are exposed at the grinding position.

[0027] During injection molding, due to the differences in the flow rate and solidification rate between the plant fibers and the plastic matrix, the surface layer of the plastic flowerpot is the plastic matrix, and the plant fibers are all encapsulated within the plastic matrix. By grinding the upper parts of the inner and outer sidewalls of the flowerpot embryo, the mixed plant fibers within the plastic matrix can be exposed, thereby opening the gas channels between the inner and outer walls of the plastic flowerpot. By retaining the plastic outer layer at the lower part of the side and the bottom of the plastic flowerpot, the plastic outer layer can function as a waterproof layer and play a role in storing water. Moreover, after grinding, steps are formed on the outer wall of the plastic flowerpot, which can prevent water from flowing directly onto the placement table of the plastic flowerpot and ensure the cleanliness of the tabletop.

[0028] The technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: 1. By mixing plant fibers into the plastic particles and exposing the plant fibers on the inner and outer surfaces of the flowerpot body through grinding after molding, a three-dimensional plant fiber network communicating with the inner and outer surfaces of the flowerpot body is formed within the flowerpot body, thereby improving the air permeability of the plastic flowerpot. 2. By adding mixed plant fibers, using the good compatibility and tight connection between the modified plant fibers and the plastic to enhance the mechanical properties of the plastic flowerpot; using the poor compatibility between the unmodified plant fibers and the plastic and the presence of cavities at the joints to increase the air gaps in the flowerpot body, further improving the air permeability of the plastic flowerpot. 3. By only grinding the upper parts of the inner and outer sidewalls of the flowerpot body, the bottom and the lower part of the flowerpot body are still wrapped by plastic to form a waterproof layer, thereby preventing the water in the plastic flowerpot from seeping out along the plant fibers and ensuring the cleanliness and beauty of the outside of the plastic flowerpot. 4. By providing a convex platform at the bottom of the flowerpot body and combining with the waterproof layer, a water storage position can be formed at the bottom of the flowerpot body, thereby reducing the frequency of watering.

[0029] The above are only the preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to obtain equivalent embodiments with equivalent changes, but as long as the content of the technical solution of the present invention is not departed from, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A breathable plastic flower pot, characterized in that: It includes a flowerpot body, which is made of plastic. Plant fibers are mixed in the flowerpot body, and an air-permeable channel connecting the inner wall and the outer wall of the flowerpot body is formed between the plant fibers. A waterproof layer is provided on the outer surface of the flowerpot body, and the waterproof layer covers the bottom and the lower part of the side of the flowerpot body.

2. A breathable plastic flower pot according to claim 1, characterized in that: A boss is arranged at the bottom of the flower pot body, and the height of the boss is greater than the height of the waterproof layer on the side of the flower pot body.

3. A breathable plastic flower pot according to claim 2, characterized in that: The boss is an annular boss, and a plurality of the annular bosses are coaxially arranged at the bottom of the flower pot body.

4. A breathable plastic flower pot according to claim 2, characterized in that: A mesh plate is placed on the boss.

5. A method for manufacturing the breathable plastic flower pot according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step S1, fully mixing plastic particles and mixed plant fibers in a weight ratio of 5-7:3-5 to obtain a mixture, wherein the mixed plant fibers include modified plant fibers and non-modified plant fibers; Step S2, injecting the mixture into a flower pot mold through an extruder, and obtaining a flower pot embryo after cooling; Step S3, grinding the upper part of the inner and outer walls of the flower pot embryo body so that the mixed plant fibers are exposed at the grinding position.

6. The method for manufacturing a breathable plastic flower pot according to claim 5, characterized in that: The method for preparing the modified plant fiber in step S1 comprises: Step S11, soaking the non-modified plant fiber in a 3% sodium hydroxide solution for 24 hours; Step S12, taking out the soaked non-modified plant fiber and washing it until the pH of the washed water is 7-8; Step S13, drying the cleaned non-modified plant fiber at 120-160° C. for 18 hours to obtain modified plant fiber.

7. The method for manufacturing a breathable plastic flower pot according to claim 5, characterized in that: The extrusion temperature of the extruder is 170-190°C.

8. The method for manufacturing a breathable plastic flower pot according to claim 5, characterized in that: The plastic particles are PE particles, PP particles, PVC particles or ABS particles.

9. The method for manufacturing a breathable plastic flower pot according to claim 5, characterized in that: The non-modified plant fiber is one of bamboo fiber, wood fiber or hemp fiber.

10. The method for manufacturing a breathable plastic flower pot according to claim 5, characterized in that: The non-modified plant fibers account for 30%-50% of the mixed plant fibers.

Images