Composite extrusion die for chlorine dioxide nano slow-release antibacterial material and PBAT / PLA (poly (butylene adipate-co-terephthalate) / polylactic acid) film

Abstract

The utility model provides a composite extrusion die for a chlorine dioxide nano slow-release antibacterial material and a PBAT / PLA (poly (butylene adipate-co-terephthalate) / poly lactic acid) film, and belongs to the technical field of preparation of polymer films. The plastic extrusion die solves the problem that the plastic extrusion die in the existing market does not have the functions of lifting and position adjusting. The composite extrusion die for the chlorine dioxide nano slow-release antibacterial material and the PBAT / PLA film comprises an extrusion die body, an extrusion die head, a screw mechanism, an air knife system, a driving mechanism and a roller table, a feeding port is formed in the upper end of the extrusion die body, the extrusion die head is arranged at the front end of the extrusion die body, the roller table is arranged at the lower end of the extrusion die head, and the screw mechanism is arranged at the lower end of the extrusion die head. The air knife system is arranged at the lower end of the extrusion die body, and an adjusting mechanism is arranged at the rear end of the extrusion die body and composed of a machine body base, a rotary disc device and a lifting device. The lifting device has the advantages of being capable of lifting and adjusting the position.

Description

Technical Field

[0001] This invention belongs to the field of polymer film preparation technology, and relates to a composite extrusion mold for chlorine dioxide nano-slow-release antibacterial material and PBAT / PLA film. Background Technology

[0002] Polylactic acid (PLA), as a biodegradable and renewable polymer, has attracted much attention from scholars due to its excellent biocompatibility and high strength and high modulus mechanical properties. However, its inherent drawbacks, such as poor ductility, low impact strength, slow degradation rate, and relatively harsh degradation conditions, limit its widespread application. Polybutylene adipate / terephthalate (PBAT) is also a biodegradable polyester polymer. Compared with other biodegradable polyester materials, it exhibits excellent flexibility due to the presence of long-chain aliphatic hydrocarbons and aromatic rings in its molecular chain. This advantage makes it suitable as a toughening modifier for PLA. However, due to the poor compatibility between PLA and PBAT, direct blending of the two easily leads to phase separation in the composite material. During the extrusion film formation process, problems such as poor melt strength and uneven film thickness arise, ultimately resulting in PLA / PBAT film products having significantly lower mechanical properties than traditional packaging films such as PE, PP, and PET.

[0003] Currently, plastic extrusion molds on the market do not have lifting and position adjustment functions, and they are inconvenient to maintain and clean, which adds a lot of trouble for operators and affects their work efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the prior art by providing a composite extrusion mold for chlorine dioxide nano-slow-release antibacterial material and PBAT / PLA film that can be raised, lowered, and adjusted in position.

[0005] The objective of this utility model can be achieved through the following technical solution: A composite extrusion mold for chlorine dioxide nano-slow-release antibacterial material and PBAT / PLA film, comprising an extrusion mold body, an extrusion die head, a screw mechanism, an air knife system, a drive mechanism, and a roller table, characterized in that: a feed inlet is provided at the upper end of the extrusion mold body; the extrusion die head is provided at the front end of the extrusion mold body; the roller table is provided at the lower end of the extrusion die head; the air knife system is provided at the lower end of the extrusion mold body and is connected to the interior of the extrusion mold body; an adjustment mechanism is provided at the rear end of the extrusion mold body; the adjustment mechanism consists of a machine base, a turntable device, and a lifting device; the turntable device and the lifting device are both provided on the machine base; the adjustment mechanism is connected to the rear end of the extrusion mold body through a column; and the position of the extrusion die head is controlled by raising, lowering, and rotating the extrusion mold body through the adjustment mechanism.

[0006] In the composite extrusion mold of the above-mentioned chlorine dioxide nano-slow-release antibacterial material and PBAT / PLA film, the turntable device includes a turntable, a drive gear, a driving gear and a driving motor. The turntable is disposed on the drive gear, and the drive gear meshes with the driving gear. The drive motor drives the driving gear to rotate, thereby controlling the rotation of the drive gear, so that the fixed disc rotates.

[0007] In the composite extrusion mold of the above-mentioned chlorine dioxide nano-slow-release antibacterial material and PBAT / PLA film, the lifting device includes a fixed plate, a lifting rod and a lifting cylinder. The fixed plate is set on the turntable by the lifting rod and rotates with the turntable. The lifting cylinder controls the lifting and lowering of the fixed plate on the turntable.

[0008] In the composite extrusion mold of the above-mentioned chlorine dioxide nano-slow-release antibacterial material and PBAT / PLA film, the drive mechanism and the screw mechanism are both set in the body of the extrusion mold, and the drive mechanism drives the screw mechanism to extrude the material inside.

[0009] Compared with existing technologies, the composite extrusion die of this chlorine dioxide nano-slow-release antibacterial material and PBAT / PLA film is equipped with an adjustment mechanism at its rear end, which can adjust the position of the composite extrusion die and improve the processing efficiency of the die. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] In the diagram, 1. Extrusion die body; 2. Extrusion die head; 3. Air knife system; 4. Roller table; 5. Feed inlet; 6. Adjustment mechanism; 7. Machine base; 8. Turntable device; 9. Lifting device; 10. Turntable; 11. Drive gear; 12. Drive gear; 13. Drive motor; 14. Fixed plate; 15. Lifting rod. Detailed Implementation

[0012] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0013] like Figure 1As shown, the composite extrusion mold for this chlorine dioxide nano-slow-release antibacterial material and PBAT / PLA film includes an extrusion mold body 1, an extrusion die head 2, a screw mechanism, an air knife system 3, a drive mechanism, and a roller table 4. The upper end of the extrusion mold body 1 is provided with a feed port 5. The extrusion die head 2 is located at the front end of the extrusion mold body 1. The roller table 4 is located at the lower end of the extrusion die head 2. The air knife system 3 is located at the lower end of the extrusion mold body 1 and is connected to the interior of the extrusion mold body 1. The rear end of the extrusion mold body 1 is provided with an adjustment mechanism 6. The adjustment mechanism 6 consists of a machine base 7, a turntable 10 device 8, and a lifting device 9. The turntable 10 device 8 and the lifting device 9 are both located on the machine base 7. The adjustment mechanism 6 is connected to the rear end of the extrusion mold body 1 through a column. The position of the extrusion die head 2 is controlled by raising and lowering and rotating the extrusion mold body 1 through the adjustment mechanism 6.

[0014] To elaborate further, the turntable 10 device 8 includes a turntable 10, a drive gear 11, a driving gear 12, and a drive motor 13. The turntable 10 is mounted on the drive gear 11, and the drive gear 11 meshes with the driving gear 12. The drive motor 13 drives the driving gear 12 to rotate, thereby controlling the drive gear 11 to rotate, which in turn causes the fixed disk 14 to rotate.

[0015] To elaborate further, when the position of the extrusion die body 1 needs to be adjusted, the drive motor 13 drives the drive gear 12 to rotate, and the rotation of the drive gear 12 drives the drive gear 11 to rotate, thereby adjusting the position of the extrusion die body 1. When the height of the extrusion die body 1 needs to be adjusted, the lifting cylinder drives the lifting rod 15 to rise or fall, thereby adjusting the height of the fixed plate 14 and driving the entire extrusion die body 1 to rise or fall.

[0016] To elaborate further, the lifting device 9 includes a fixed plate 14, a lifting rod 15, and a lifting cylinder. The fixed plate 14 is mounted on the turntable 10 via the lifting rod 15 and rotates as the turntable 10 rotates. The lifting cylinder controls the lifting and lowering of the fixed plate 14 on the turntable 10.

[0017] To elaborate further, both the drive mechanism and the screw mechanism are located inside the extrusion die body 1. The drive mechanism drives the screw mechanism to extrude the material inside.

[0018] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0019] Although this document frequently uses terms such as extrusion die body 1, extrusion die head 2, air knife system 3, roller table 4, feed port 5, adjusting mechanism 6, machine base 7, turntable device 8, lifting device 9, turntable 10, drive gear 11, driving gear 12, drive motor 13, fixed plate 14, and lifting rod 15, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A composite extrusion die for chlorine dioxide nano-slow-release antibacterial material and PBAT / PLA film, comprising an extrusion die body (1), an extrusion die head (2), a screw mechanism, an air knife system (3), a drive mechanism, and a roller table (4), characterized in that, The upper end of the extrusion die body (1) is provided with a feed port (5), the extrusion die head (2) is provided at the front end of the extrusion die body (1), the roller table (4) is provided at the lower end of the extrusion die head (2), the air knife system (3) is provided at the lower end of the extrusion die body (1) and is connected to the interior of the extrusion die body (1), the rear end of the extrusion die body (1) is provided with an adjustment mechanism (6), the adjustment mechanism (6) is composed of a machine base (7), a turntable (10) device (8) and a lifting device (9), the turntable (10) device (8) and the lifting device (9) are both provided on the machine base (7), the adjustment mechanism (6) is connected to the rear end of the extrusion die body (1) through a column, and the position of the extrusion die head (2) is controlled by adjusting the extrusion die body (1) by lifting and rotating the adjustment mechanism (6).

2. The composite extrusion die for a chlorine dioxide nano-slow-release antibacterial material and a PBAT / PLA film according to claim 1, characterized in that, The turntable (10) device (8) includes a turntable (10), a drive gear (11), a drive gear (12), and a drive motor (13). The turntable (10) is mounted on the drive gear (11), and the drive gear (11) meshes with the drive gear (12). The drive gear (12) is driven to rotate by the drive motor (13), thereby controlling the drive gear (11) to rotate, so that the fixed disk (14) rotates.

3. The composite extrusion die for a chlorine dioxide nano-slow-release antibacterial material and a PBAT / PLA film according to claim 2, characterized in that, The lifting device (9) includes a fixed plate (14), a lifting rod (15) and a lifting cylinder. The fixed plate (14) is set on the turntable (10) by the lifting rod (15) and rotates with the rotation of the turntable (10). The lifting cylinder controls the fixed plate (14) to rise and fall on the turntable (10).

4. The composite extrusion die for a chlorine dioxide nano-slow-release antibacterial material and a PBAT / PLA film according to claim 1, characterized in that, The drive mechanism and screw mechanism are both located inside the extrusion die body (1), and the drive mechanism drives the screw mechanism to extrude the material inside.

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