Plastic particle production process

Abstract

The invention relates to the technical field of master batch production, in particular to a plastic particle production process which comprises the following steps: extruding a first plastic strip with first performance through a first raw material and a first extruder, and extruding a second plastic strip with second performance through a second raw material and a second extruder; the first plastic strip and the second plastic strip are bonded together to form a multi-performance plastic strip; cooling and molding the multi-performance plastic strip through a cooling device; and pelletizing the cooled multi-performance plastic strip through a pelletizing device to obtain the multi-performance master batch. According to the process, raw materials required by the master batch with multiple properties are split into multiple single-property raw materials and extruded into plastic strips, then the multiple single-property plastic strips are bonded together to form a whole multi-property plastic strip, and then the multi-property plastic strip is cooled and then diced, so that the ratio of the obtained multi-property master batch is more uniform; and the multi-performance master batch with more stable quality can be obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of masterbatch production, and in particular to a plastic particle production process. Background Art

[0002] In the raw materials of plastic masterbatch (also called plastic color masterbatch or modified masterbatch or plastic masterbatch), various types of additives are often used to improve the performance of plastics or give them specific characteristics, such as multi-performance plastic masterbatch with strong flame retardancy, corrosion resistance, and insulation. This kind of masterbatch can be used to prepare various plastic products later.

[0003] In the prior art, the preparation method of multi-performance masterbatch generally adopts the method of uniformly mixing various raw materials and additives together, and then extruding them through an extruder to obtain multi-performance masterbatch. This preparation method has the following problems: Since multiple raw materials need to be uniformly mixed, the uniformity of the raw materials after mixing determines the stability of the masterbatch quality. With each additional raw material or additive, the difficulty of uniform mixing will increase geometrically. The only way to improve the mixing uniformity is to increase the stirring speed and stirring time. Therefore, the more types of raw materials, the higher the difficulty and precision requirements in the mixing process. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art that multi-performance masterbatch raw materials are difficult to mix and the quality of the masterbatch is unstable, and a plastic particle production process is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A plastic granule production process comprises at least the following steps:

[0007] s1. Extruding a first plastic strip having a first property through a first raw material and a first extruder, and extruding a second plastic strip having a second property through a second raw material and a second extruder;

[0008] s2, bonding the first plastic strip and the second plastic strip together to form a multi-performance plastic strip;

[0009] s3, cooling the multi-performance plastic strip through a cooling device to form it;

[0010] s4. The cooled multi-performance plastic strips are pelletized by a pelletizing device to obtain multi-performance masterbatches.

[0011] The first raw material at least includes a first carrier and a first additive;

[0012] And / or, the second raw material at least includes a second carrier and a second additive.

[0013] The first additive is at least one of a colorant, an antioxidant, a UV stabilizer, a flame retardant, an antistatic agent, a plasticizer, a lubricant, a toughening agent, a filler, an antibacterial agent, and a processing aid;

[0014] And / or, the second additive is at least one of a colorant, an antioxidant, a UV stabilizer, a flame retardant, an antistatic agent, a plasticizer, a lubricant, a toughening agent, a filler, an antibacterial agent and a processing aid.

[0015] The first carrier is one of polyethylene, polypropylene, polystyrene, polyester, and ethylene-vinyl acetate copolymer;

[0016] And / or, the second carrier is one of polyethylene, polypropylene, polystyrene, polyester, and ethylene-vinyl acetate copolymer.

[0017] The first extruder has a first adjustable extrusion die head, and the first adjustable extrusion die head can adjust the diameter of the first plastic strip;

[0018] And / or, the second extruder has a second adjustable extrusion die head, and the second adjustable extrusion die head is capable of adjusting the diameter of the second plastic strip.

[0019] The invention comprises a kneading device, and the kneading device can bond the first plastic strip and the second plastic strip together.

[0020] The kneading device can wind the first plastic strip and the second plastic strip just extruded into a twist shape.

[0021] The kneading device can extrude and bond the first plastic strip and the second plastic strip that have just been extruded together.

[0022] The multi-performance masterbatch is melted, stirred, and then sent to the final extruder for extrusion, cooling, and pelletizing to obtain the final required masterbatch.

[0023] The present invention proposes a plastic particle production process, which has the beneficial effect of: this process splits the raw materials required for a masterbatch with multiple properties into multiple single-performance raw materials and extrude them into plastic strips, and then adheres the multiple single-performance plastic strips together to form a whole multi-performance plastic strip, and then cuts the multi-performance plastic strip into pellets after cooling. In this way, the ratio of the multi-performance masterbatch obtained will be more uniform, and because the single-performance raw materials contain a relatively small amount of raw materials, the mixing difficulty will be much lower than the difficulty of uniformly mixing multiple raw materials in the traditional way. Through this process, a multi-performance masterbatch with more stable quality can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] In the figure: a first extruder 1, a second extruder 2, a first plastic strip 3, a second plastic strip 4, a mixing device 5, a cooling device 6, a multi-performance plastic strip 7, a pelletizing device 8, and a multi-performance masterbatch 9. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Reference Figure 1 , a plastic granule production process, comprising at least the following steps:

[0028] s1, extruding a first plastic strip 3 with a first property through a first raw material and a first extruder 1, and extruding a second plastic strip 4 with a second property through a second raw material and a second extruder 2;

[0029] s2, bonding the first plastic strip 3 and the second plastic strip 4 together to form a multi-performance plastic strip 7;

[0030] s3, cooling the multi-performance plastic strip 7 through the cooling device 6 to form a mold;

[0031] s4. The cooled multi-performance plastic strip 7 is pelletized by a pelletizing device 8 to obtain a multi-performance masterbatch 9.

[0032] This process splits the raw materials needed for a multi-performance masterbatch into multiple single-performance raw materials and extrude them into plastic strips, and then bonds the multiple single-performance plastic strips together to form a whole multi-performance plastic strip 7, and then cuts the multi-performance plastic strip 7 into pellets after cooling. In this way, the multi-performance masterbatch 9 obtained will have a more uniform ratio, and because the single-performance raw materials contain a relatively small amount of raw materials, the mixing difficulty will be much lower than the difficulty of traditional unified mixing of multiple raw materials. Through this process, a multi-performance masterbatch with more stable quality can be obtained.

[0033] The first raw material includes at least a first carrier and a first additive; and / or, the second raw material includes at least a second carrier and a second additive. The first additive is at least one of a colorant, an antioxidant, a UV stabilizer, a flame retardant, an antistatic agent, a plasticizer, a lubricant, a toughening agent, a filler, an antibacterial agent, and a processing aid; and / or, the second additive is at least one of a colorant, an antioxidant, a UV stabilizer, a flame retardant, an antistatic agent, a plasticizer, a lubricant, a toughening agent, a filler, an antibacterial agent, and a processing aid. The first carrier is one of polyethylene, polypropylene, polystyrene, polyester, and ethylene-vinyl acetate copolymer; and / or, the second carrier is one of polyethylene, polypropylene, polystyrene, polyester, and ethylene-vinyl acetate copolymer.

[0034] As an implementation method: polyethylene and an antioxidant are mixed by a mixing device to obtain a first raw material, polyethylene and an antistatic agent are mixed by a mixing device to obtain a second raw material, a first plastic strip having a first property is extruded by a first extruder, and a second plastic strip having a second property is extruded by a second extruder at the same time, and then the extruded molten first plastic strip and the second plastic strip are brought close to each other, and the two are bonded together in a molten state, and then cooled and pelletized to obtain a multi-performance masterbatch with antistatic and antioxidant properties.

[0035] Of course, depending on the required performance, a third raw material, a third extruder, a fourth raw material, a fourth extruder, and so on can be set.

[0036] As an implementation method, if the weight ratio of traditional raw materials is: polyethylene: antioxidant: antistatic agent = 10:4:6, then when producing through this process, the first raw material can be: polyethylene: antioxidant = 5:4, and the second raw material can be: polyethylene: antistatic agent = 5:6, so that the total ratio is equal to the required ratio.

[0037] As another embodiment, the first extruder 1 has a first adjustable extrusion die head, which can adjust the diameter of the first plastic strip 3; and / or the second extruder 2 has a second adjustable extrusion die head, which can adjust the diameter of the second plastic strip 4. The total ratio can also be adjusted by adjusting the different diameters of the first plastic strip 3 and the second plastic strip 4.

[0038] Whether by adjusting the raw material formula or by adjusting the diameter of the extruded plastic strip, as long as the total ratio specified by the multi-performance masterbatch 9 can be obtained, it will be fine.

[0039] The first extruder and the second extruder have the same basic speed when working, so that the first plastic strip 3 and the second plastic strip 4 can move synchronously to avoid misalignment.

[0040] The invention comprises a kneading device 5, which can bond the first plastic strip 3 and the second plastic strip 4 together. The first plastic strip 3 and the second plastic strip 4 are bonded together by the kneading device 5, so that each multi-performance masterbatch 9 has an accurate ratio.

[0041] The kneading device 5 can wind the first plastic strip 3 and the second plastic strip 4 just extruded into a twist shape. The first plastic strip 3 and the second plastic strip 4 are both twisted into a twist shape.

[0042] Alternatively, the kneading device 5 can extrude and bond the first plastic strip 3 and the second plastic strip 4 that have just been extruded together.

[0043] After the multi-performance masterbatch 9 is melted and stirred, it is sent to the final extruder 10 for extrusion, cooling, and pelletizing to obtain the final desired masterbatch. The obtained multi-performance masterbatch 9 is melted and stirred again, so that the bonded multi-performance masterbatch 9 is melted into a whole, and the final desired masterbatch can be obtained after extrusion again, further improving the quality of the masterbatch.

[0044] When this process is used to prepare multi-performance masterbatches, since more extrusion equipment is involved, it is more suitable for preparing high-end product masterbatches with higher ratio requirements.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technical solution, conception, and design obtained by equivalent replacement or modification of the technical solution and inventive concept of the present invention by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A plastic granule production process, characterized in that: At least the following steps are included: s1, extruding a first plastic strip (3) having a first property through a first raw material and a first extruder (1), and extruding a second plastic strip (4) having a second property through a second raw material and a second extruder (2); s2, bonding the first plastic strip (3) and the second plastic strip (4) together to form a multi-functional plastic strip (7); s3, cooling the multi-functional plastic strip (7) through a cooling device (6) to form the strip; s4. The cooled multi-performance plastic strip (7) is pelletized by a pelletizing device (8) to obtain a multi-performance masterbatch (9).

2. A plastic granule production process according to claim 1, characterized in that: The first raw material at least includes a first carrier and a first additive; And / or, the second raw material at least includes a second carrier and a second additive.

3. A plastic granule production process according to claim 2, characterized in that: The first additive is at least one of a colorant, an antioxidant, a UV stabilizer, a flame retardant, an antistatic agent, a plasticizer, a lubricant, a toughening agent, a filler, an antibacterial agent, and a processing aid; And / or, the second additive is at least one of a colorant, an antioxidant, a UV stabilizer, a flame retardant, an antistatic agent, a plasticizer, a lubricant, a toughening agent, a filler, an antibacterial agent and a processing aid.

4. A plastic granule production process according to claim 2, characterized in that: The first carrier is one of polyethylene, polypropylene, polystyrene, polyester, and ethylene-vinyl acetate copolymer; And / or, the second carrier is one of polyethylene, polypropylene, polystyrene, polyester, and ethylene-vinyl acetate copolymer.

5. A plastic granule production process according to claim 1, characterized in that: The first extruder (1) has a first adjustable extrusion die head, and the first adjustable extrusion die head is capable of adjusting the diameter of the first plastic strip (3); And / or, the second extruder (2) has a second adjustable extrusion die head, and the second adjustable extrusion die head is capable of adjusting the diameter of the second plastic strip (4).

6. A plastic granule production process according to claim 1, characterized in that: It comprises a kneading device (5), and the kneading device (5) is capable of bonding the first plastic strip (3) and the second plastic strip (4) together.

7. A plastic granule production process according to claim 6, characterized in that: The kneading device (5) can wind the first plastic strip (3) and the second plastic strip (4) just extruded into a twisted shape.

8. A plastic granule production process according to claim 6, characterized in that: The kneading device (5) is capable of extruding and bonding the first plastic strip (3) and the second plastic strip (4) that have just been extruded together.

9. A plastic granule production process according to any one of claims 1 to 8, characterized in that: The multi-performance masterbatch (9) is melted, stirred, and then sent to the final extruder (10) for extrusion, cooling, and pelletizing to obtain the final desired masterbatch.

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