Waste plastic regeneration sieve plate as well as preparation method and application thereof

Abstract

The invention discloses a waste plastic regeneration sieve plate as well as a preparation method and application thereof, and relates to the technical field of waste plastic recovery. Sieve holes of the sieve hole plate are square or round, the side length of the square sieve holes is 10-20 mm, and the diameter of the round sieve holes is 10-30 mm. The plate thickness of the sieve mesh plate is 15-30 mm, and the hole wall thickness of the sieve mesh plate is 1-2 mm. The method comprises the following steps that 1, after waste plastics are recycled, decontamination treatment is conducted; and step 2, after decontamination, melting the waste plastics, adding an auxiliary agent, and preparing the sieve plate through a pressing or extrusion molding process. According to the invention, the waste plastics are reprocessed and manufactured into the sieve pore plate, and the sieve pore plate is embedded into the cement concrete and the asphalt concrete as a hoop to serve as an internal reinforcing structure, so that the mechanical property and durability of the concrete are improved, the strength and toughness of the concrete are improved, the environment is protected, and the building cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of waste plastic recycling, in particular to a waste plastic regeneration sieve plate and a preparation method and application thereof. Background Art

[0002] Plastic is a material that is polymerized by synthesis or condensation reaction using monomer raw materials. It is composed of synthetic resin and additives such as fillers, plasticizers, stabilizers, lubricants, and colorants. Its main component is synthetic resin. Waste plastic is plastic that has been used in civil and industrial applications and eventually eliminated or replaced. The random disposal of waste plastic will cause large-scale pollution, so it is necessary to recycle waste plastic through a certain recycling process.

[0003] Concrete is a commonly used building material. In order to reinforce concrete and enhance its bearing strength, ferrules are often buried during construction. Ferrules are generally made of steel, which consumes a lot of resources and increases construction costs. Therefore, we propose a waste plastic recycled sieve plate and its preparation method and application to solve the above problems.

[0004] The above information disclosed in this background technology is only used to increase the understanding of the background technology of the present invention and therefore, it may include information that does not constitute the prior art known to ordinary technicians in this field. Summary of the invention

[0005] The object of the present invention is to provide a waste plastic regeneration sieve plate and a preparation method and application thereof, so as to solve the problems raised by the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a waste plastic regeneration sieve plate, wherein the sieve holes of the sieve plate are square or circular, the side length of the square sieve holes is 10-20 mm, and the diameter of the circular sieve holes is 10-30 mm.

[0007] Preferably, the sieve plate has a plate thickness of 15-30 mm and a hole wall thickness of 1-2 mm.

[0008] A method for preparing a waste plastic regeneration sieve plate comprises the following steps:

[0009] Step 1: After recycling the waste plastics, perform decontamination treatment;

[0010] Step 2: After decontamination, the waste plastic is melted, an additive is added, and a sieve plate is made through a pressing or extrusion process.

[0011] Preferably, the decontamination treatment adopts intermittent cleaning.

[0012] Preferably, the auxiliary agent includes a plasticizer, a reinforcing filler and an impact modifier, the plasticizer is dibutyl phthalate, the reinforcing filler is glass fiber, and the impact modifier is acrylonitrile-butadiene-styrene copolymer.

[0013] The present invention also provides the above-mentioned waste plastic recycled sieve plate as a sleeve for use in concrete.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The invention reprocesses waste plastics into sieve plates, and uses the sieve plates as hoops to bury them in cement concrete and asphalt concrete as internal reinforcement structures, thereby improving the mechanical properties and durability of concrete, and improving the strength and toughness of concrete, which is both environmentally friendly and reduces construction costs.

[0016] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a plane schematic diagram of a square sieve plate of the present invention;

[0018] Figure 2 It is a plan view of a circular sieve plate of the present invention;

[0019] Figure 3 It is a schematic elevation diagram of a square and a circular sieve plate of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0021] A waste plastic recycling sieve plate, the sieve holes of the sieve plate are square or circular, the side length of the square sieve holes is 10-20 mm, the diameter of the circular sieve holes is 10-30 mm, the plate thickness of the sieve plate is 15-30 mm, and the hole wall thickness is 1-2 mm.

[0022] A method for preparing a waste plastic regeneration sieve plate comprises the following steps:

[0023] Step 1: After the waste plastics are recycled, they are decontaminated by intermittent cleaning;

[0024] Specifically, the waste plastics are rinsed in a water tank, and loose dirt such as sand and soil adhering to the surface of the plastics is removed with a mechanical agitator to sink to the bottom of the tank; if there are a lot of wood chips and paper pieces, they can be further purified in a sedimentation tank equipped with a special pump. For firmly attached dirt, such as printing ink and paper labels coated with adhesives, larger pieces can be manually picked out first, and after crushing, they can be soaked in a hot alkaline aqueous solution tank for a period of time, and then mechanically stirred to make them rub and collide with each other to remove dirt. Finally, the cleaned crushed waste plastics are sent to a centrifuge for drying, and then dried with hot air in two steps until the residual moisture is <0.5%.

[0025] Step 2: After decontamination, the waste plastic is melted, and a plasticizer, a reinforcing filler and a resistant modifier are added, and a sieve plate is made by pressing or extrusion. The plasticizer is dibutyl phthalate, the reinforcing filler is glass fiber, and the resistant modifier is acrylonitrile-butadiene-styrene copolymer. The mass ratio of the waste plastic, the plasticizer, the reinforcing filler and the resistant modifier is 100:1-4:5-10:3-6.

[0026] The waste plastic recycled sieve plate is used as a ferrule in concrete.

[0027] Example 1

[0028] Step 1: After the waste plastics are recycled, they are decontaminated by intermittent cleaning;

[0029] Step 2: After decontamination, the waste plastic is melted, and a plasticizer, a reinforcing filler and a resistant modifier are added, and a sieve plate is made by pressing or extrusion. The plasticizer is dibutyl phthalate, the reinforcing filler is glass fiber, and the resistant modifier is acrylonitrile-butadiene-styrene copolymer. The mass ratio of the waste plastic, the plasticizer, the reinforcing filler and the resistant modifier is 100:1:5:3.

[0030] Example 2

[0031] Step 1: After the waste plastics are recycled, they are decontaminated by intermittent cleaning;

[0032] Step 2: After decontamination, the waste plastic is melted, and a plasticizer, a reinforcing filler and a resistant modifier are added, and a sieve plate is made by pressing or extrusion. The plasticizer is dibutyl phthalate, the reinforcing filler is glass fiber, and the resistant modifier is acrylonitrile-butadiene-styrene copolymer. The mass ratio of the waste plastic, the plasticizer, the reinforcing filler and the resistant modifier is 100:2:7:4.

[0033] Example 3

[0034] Step 1: After the waste plastics are recycled, they are decontaminated by intermittent cleaning;

[0035] Step 2: After decontamination, the waste plastic is melted, and a plasticizer, a reinforcing filler and a resistant modifier are added, and a sieve plate is made by pressing or extrusion. The plasticizer is dibutyl phthalate, the reinforcing filler is glass fiber, and the resistant modifier is acrylonitrile-butadiene-styrene copolymer. The mass ratio of the waste plastic, the plasticizer, the reinforcing filler and the resistant modifier is 100:3:9:5.

[0036] Example 4

[0037] Step 1: After the waste plastics are recycled, they are decontaminated by intermittent cleaning;

[0038] Step 2: After decontamination, the waste plastic is melted, and a plasticizer, a reinforcing filler and a resistant modifier are added, and a sieve plate is made by pressing or extrusion. The plasticizer is dibutyl phthalate, the reinforcing filler is glass fiber, and the resistant modifier is acrylonitrile-butadiene-styrene copolymer. The mass ratio of the waste plastic, the plasticizer, the reinforcing filler and the resistant modifier is 100:4:10:6.

[0039] Table 1. Mechanical properties test results of waste plastic regeneration sieve plate of Examples 1-4

[0040] project Tensile strength(MPa) Elastic modulus(GPa) Yield strength (MPa) Example 1 40.78 1.3 30.05 Example 2 41.47 1.3 31.22 Example 3 41.23 1.3 30.51 Example 4 41.31 1.3 30.14

[0041] From the above, it can be seen that the waste plastic recycled sieve plate prepared by the present invention performs well in mechanical properties and meets the use requirements of application in concrete ferrules. It can be embedded in cement concrete and asphalt concrete as a ferrule as an internal reinforcement structure to improve the mechanical properties and durability of concrete.

[0042] In order to verify the effectiveness of the waste plastic recycled sieve plate prepared by the present invention as a hoop in improving the performance of concrete, the waste plastic recycled sieve plate of Examples 1-4 was buried in concrete, and the mechanical properties of the concrete were tested. The test results are shown in Table 2.

[0043] Table 2. Mechanical properties of concrete with recycled sieve plates from waste plastics embedded in concrete in Example 1-4

[0044] project Compressive strength(MPa) Flexural strength(MPa) Ordinary concrete 28.51 1.75 Example 1 Waste plastic recycled sieve plate concrete 28.96 1.97 Example 2 Waste plastic recycled sieve plate concrete 31.24 2.63 Example 3 Waste plastic recycled sieve plate concrete 29.33 2.11 Example 4 Waste plastic recycled sieve plate concrete 30.12 2.47

[0045] It can be seen from Table 2 that the waste plastic recycled sieve plate, used as a hoop in concrete, improves the strength and toughness of concrete.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0047] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A waste plastic regeneration sieve plate, characterized in that: The mesh holes of the mesh plate are in a square or circular shape, the side length of the square mesh holes is 10-20 mm, and the diameter of the circular mesh holes is 10-30 mm.

2. A waste plastic regeneration sieve plate according to claim 1, characterized in that: The sieve plate has a plate thickness of 15-30 mm and a hole wall thickness of 1-2 mm.

3. The method for preparing a waste plastic regeneration sieve plate according to any one of claims 1 to 2, characterized in that: The steps include: Step 1: After recycling the waste plastics, perform decontamination treatment; Step 2: After decontamination, the waste plastic is melted, an additive is added, and a sieve plate is made through a pressing or extrusion process.

4. The method for preparing a waste plastic regeneration sieve plate according to claim 3, characterized in that: The decontamination treatment adopts intermittent cleaning.

5. The method for preparing a waste plastic regeneration sieve plate according to claim 3, characterized in that: The auxiliary agent comprises a plasticizer, a reinforcing filler and an impact modifier. The plasticizer is dibutyl phthalate, the reinforcing filler is glass fiber, the impact modifier is acrylonitrile-butadiene-styrene copolymer, and the mass ratio of waste plastic, plasticizer, reinforcing filler and impact modifier is 100:1-4:5-10:3-6.

6. The waste plastic regeneration sieve plate as described in any one of claims 1 to 5 is used as a hoop in concrete.

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