PVC environment-friendly self-adhesive wire and cable packaging film and preparation method thereof

Abstract

The invention discloses a PVC environment-friendly self-adhesive wire and cable packaging film and a preparation method thereof. The PVC environment-friendly self-adhesive wire and cable packaging film comprises the following raw materials in parts by weight: 50-80 parts of polyvinyl chloride master batch, 10-20 parts of an environment-friendly plasticizer, 2-5 parts of a stabilizer, 0.1-1 part of an antioxidant, 0.1-1 part of an ultraviolet light absorber, 3-10 parts of a tackifier and 5-20 parts of an elastomer. The device has the advantage of efficient processing, and the problems that in the preparation process of an existing PVC environment-friendly self-adhesive wire and cable packaging film, efficient processing of the packaging film is inconvenient, the automation degree is low, the production efficiency of the packaging film is low, and the production cost and the labor amount of workers are increased are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging film processing, and specifically relates to a PVC environmentally friendly self-adhesive wire and cable packaging film and a preparation method thereof. Background Art

[0002] The PVC environmentally friendly self-adhesive wire and cable packaging film belongs to a kind of packaging film, mainly used for winding and packaging wires and cables. This film is mainly made of polyvinyl chloride, but different from traditional PVC materials, it uses environmentally friendly plasticizers and other additives in the production process to reduce the impact on the environment. This packaging film has self-adhesiveness, which means it can firmly wrap around the wire and cable without additional glue or adhesive, providing good sealing and protection. It can effectively prevent moisture, dust and other pollutants from entering the cable interior, and at the same time provides physical protection for the wire and cable, avoiding scratches and abrasions.

[0003] In the process of preparing the existing PVC environmentally friendly self-adhesive wire and cable packaging film, it is not convenient to efficiently process the packaging film, and the degree of automation is low, resulting in low production efficiency of the packaging film, increasing the production cost and the labor intensity of workers. Summary of the Invention

[0004] The purpose of the present invention is to provide a PVC environmentally friendly self-adhesive wire and cable packaging film and a preparation method thereof, which have the advantage of efficient processing, and solve the problems that in the process of preparing the existing PVC environmentally friendly self-adhesive wire and cable packaging film, it is not convenient to efficiently process the packaging film, and the degree of automation is low, resulting in low production efficiency of the packaging film, increasing the production cost and the labor amount of workers.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A PVC environmentally friendly self-adhesive wire and cable packaging film, including the following raw materials counted by weight parts:

[0006] 50 - 80 parts of polyvinyl chloride masterbatch, 10 - 20 parts of environmentally friendly plasticizer, 2 - 5 parts of stabilizer, 0.1 - 1 part of antioxidant, 0.1 - 1 part of ultraviolet absorber, 3 - 10 parts of tackifier, 5 - 20 parts of elastomer.

[0007] A preparation method of a PVC environmentally friendly self-adhesive wire and cable packaging film, including the following steps:

[0008] S1. Raw material preparation, weighing the polyvinyl chloride masterbatch, environmentally friendly plasticizer, stabilizer, antioxidant, ultraviolet absorber, tackifier and elastomer according to the ratio;

[0009] S2. Raw material mixing: First, add polyvinyl chloride masterbatch into the mixing equipment, and then successively add stabilizer, antioxidant, ultraviolet absorber, environmentally friendly plasticizer, and elastomer and tackifier, and stir and mix them.

[0010] S3. Plasticization of the mixture: After the mixing is completed, send the mixture into a twin-screw extruder, and make the material melt and plasticize through heating and screw shear force.

[0011] S4. Extrusion molding: Install a T-shaped die head at the discharge end of the twin-screw extruder. The melted raw material enters the feed end of the T-shaped die head, and then forms a film structure through the plasticity of the T-shaped die head, and finally is discharged through its discharge end.

[0012] S5. Cooling and shaping: The melt film extruded from the T-shaped die head enters the cooling equipment and is wound around the cooling roller of the cooling equipment. The film is quickly cooled and shaped by the cooling roller to form a transparent or semi-transparent film.

[0013] S6. Traction and winding: Traction equipment is used to traction the cooled film. The traction equipment traction the film through the traction roller. The rotation speed of the traction roller is adapted to the extrusion speed and the rotation speed of the cooling roller to avoid excessive stretching or relaxation of the film. Finally, the film is wound by the winding roller.

[0014] S7. Quality inspection: Conduct quality inspection on the wound film.

[0015] Preferably, as a preparation method of a PVC environmentally friendly self-adhesive wire and cable packaging film of the present invention, the polyvinyl chloride masterbatch in S1 selects high-purity PVC resin, the environmentally friendly plasticizer selects epoxidized soybean oil, the stabilizer selects calcium-zinc stabilizer, the antioxidant selects phenolic antioxidant, the ultraviolet absorber selects UV-531, the tackifier selects terpene resin, and the elastomer selects ethylene-vinyl acetate copolymer.

[0016] Preferably, as a preparation method of a PVC environmentally friendly self-adhesive wire and cable packaging film of the present invention, when stirring and mixing in S2, first perform low-speed mixing, then perform high-speed mixing, and heat the raw materials during the mixing process. The heating temperature is 80-100°C, the high-speed mixing time is 5-9 minutes, and the low-speed mixing time is 2-3 minutes.

[0017] Preferably, as a preparation method of a PVC environmentally friendly self-adhesive wire and cable packaging film of the present invention, the twin-screw extruder in S3 includes three heating zones. The heating temperature of the first zone is 140-150°C, the heating temperature of the second zone is 160-170°C, and the heating temperature of the third zone is 170-180°C. The raw material first enters the first zone for preheating, then enters the second zone for heating up, and finally is melted by the third zone. The melted raw material enters the extrusion equipment.

[0018] Preferably, as a preparation method of the PVC environment-friendly self-adhesive wire and cable packaging film of the present invention, the T-shaped die head in S4 includes a central feed pipe, which is communicated with the discharge port of the twin-screw extruder. The central discharge pipe is communicated with a distribution manifold, and the distribution manifold divides the molten material into multiple flowing materials. The distribution manifold is communicated with a transverse flow channel, and the transverse flow guides the multiple flowing materials into the die lip structure. A flow channel adjusting device is arranged on the transverse flow channel. The flow adjusting device controls the thickness distribution of the film by adjusting the width or height of the flow channel. The die lip structure is composed of two upper and lower metal plates, with a narrow die lip gap left in the middle for controlling the final thickness of the film. The final material is discharged through the die lip structure to form a film.

[0019] Preferably, as a preparation method of the PVC environment-friendly self-adhesive wire and cable packaging film of the present invention, the cooling roller in S5 is communicated with a cold water circulation device, the cooling temperature is 40-60°C, and the rotation speed of the cooling roller is adapted to the extrusion speed of the T-shaped die head to control the thickness of the film. The film thickness is 20-100μm.

[0020] Preferably, as a preparation method of the PVC environment-friendly self-adhesive wire and cable packaging film of the present invention, in S6 during traction and winding, the tension of the traction roller and the winding roller is adjusted to ensure that the film is flat and free of wrinkles. After winding is completed, the film roll is width-cut into a width suitable for winding wires and cables.

[0021] Preferably, as a preparation method of the PVC environment-friendly self-adhesive wire and cable packaging film of the present invention, when performing quality inspection in S7, first use a thickness gauge to test the thickness of the film to ensure thickness uniformity, then detect the self-adhesion through a peel strength tester, and finally use a simulated ultraviolet irradiation device and a high and low temperature cycling device to test the environmental friendliness and durability of the film.

[0022] Preferably, as a preparation method of the PVC environment-friendly self-adhesive wire and cable packaging film of the present invention, after the quality inspection in S7 is completed, the qualified film roll is wrapped with a moisture-proof film and then stored in a sealed and dry manner.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. The T-die of the present invention distributes the molten material evenly to the lateral flow channel through the diversion manifold. Combined with the flow channel adjustment device, it can dynamically compensate for the flow channel width and eliminate defects caused by differences in material flow rates. The narrow die lip gap formed by the upper and lower metal plates further refines the film thickness. Combined with the flow channel adjustment, precise control of the thickness can be achieved. The three-zone heating of the twin-screw extruder can completely plasticize and eliminate bubbles to ensure melt uniformity. The rotation speed of the cooling roller is dynamically adapted to the extrusion speed to avoid uneven shrinkage or excessive stretching of the film due to excessive cooling. The overall energy consumption is reduced through the efficient shearing and plasticizing of the twin-screw extruder and the precise temperature control of the cooling roller.

[0025] 2. The traction roller and winding roller of the present invention are independently driven by a servo motor, and the tension is monitored and adjusted in real time to ensure that the film is free of wrinkles or stretching deformation under high-speed operation. A laser width gauge is used in conjunction with the servo cutting system to control the slitting width error within ±0.5mm, meeting the strict requirements of cable winding on film width. The online thickness gauge monitors the thickness distribution in real time. Abnormal data triggers an alarm and automatically shuts down to ensure thickness uniformity. The peel strength tester conducts random inspections on each batch and combines AI image analysis technology to improve the pass rate. After simulating ultraviolet irradiation and high and low temperature cycles, the self-adhesive strength and yellowing index are tested to ensure long-term reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the preparation process of the present invention. DETAILED DESCRIPTION

[0027] Example 1

[0028] A PVC environmentally friendly self-adhesive wire and cable packaging film, comprising the following raw materials in parts by weight:

[0029] 50-80 parts of polyvinyl chloride masterbatch, 10-20 parts of environmentally friendly plasticizer, 2-5 parts of stabilizer, 0.1-1 part of antioxidant, 0.1-1 part of ultraviolet absorber, 3-10 parts of tackifier, 5-20 parts of elastomer.

[0030] By using environmentally friendly plasticizers, the potential environmental pollution problems caused by traditional plasticizers are reduced, meeting modern environmental protection requirements. The addition of stabilizers can improve the thermal stability, light stability, and processing stability of the material, helping to extend the service life of the product and maintaining its performance from significantly declining over time. Adding antioxidants and ultraviolet absorbers can effectively resist the damage caused by oxidation and ultraviolet radiation to the material, further protecting the wire and cable and ensuring its good performance under various environmental conditions. The use of tackifiers and elastomers enhances the self-adhesion and elasticity of the film, making it easier to wrap the wire and cable to form a tight protective layer. At the same time, it also helps to adapt to the surfaces of wire and cables of different shapes and sizes, providing better fit and sealing. This formulation combines the advantages of various additives, making the finally prepared PVC film not only have good mechanical properties but also excellent electrical insulation properties, meeting the requirements of wire and cable packaging.

[0031] Example 2

[0032] Please refer to Figure 1 , a preparation method of an environmentally friendly self-adhesive wire and cable packaging PVC film, comprising the following steps:

[0033] S1. Raw material preparation: Weigh polyvinyl chloride masterbatch, environmentally friendly plasticizer, stabilizer, antioxidant, ultraviolet absorber, tackifier, and elastomer according to the ratio.

[0034] S2. Raw material mixing: First add polyvinyl chloride masterbatch into the mixing equipment, and then successively add stabilizer, antioxidant, ultraviolet absorber, environmentally friendly plasticizer, and elastomer box tackifier for stirring and mixing.

[0035] S3. Plasticization of the mixture: After mixing, send the mixture into a twin-screw extruder to melt and plasticize the material through heating and screw shear force.

[0036] S4. Extrusion molding: Install a T-shaped die head at the discharge end of the twin-screw extruder. The melted raw material enters the feed end of the T-shaped die head, and then forms a film structure through the plasticity of the T-shaped die head and finally discharges through its discharge end.

[0037] S5. Cooling and shaping: The melt film extruded from the T-shaped die head enters the cooling equipment and winds around the cooling roller of the cooling equipment. The film is quickly cooled and shaped by the cooling roller to form a transparent or semi-transparent film.

[0038] S6. Traction and winding: Traction equipment is used to traction the cooled film. The traction equipment traction the film through the traction roller. The rotation speed of the traction roller is adapted to the extrusion speed and the rotation speed of the cooling roller to avoid excessive stretching or relaxation of the film. Finally, the film is wound by the winding roller.

[0039] S7. Quality inspection is carried out on the film after winding.

[0040] Furthermore, for the PVC masterbatch in S1, high-purity PVC resin is selected; for the environmental plasticizer, epoxidized soybean oil is chosen; for the stabilizer, calcium-zinc stabilizer is selected; for the antioxidant, phenolic antioxidant is chosen; for the ultraviolet absorber, UV-531 is selected; for the tackifier, terpene resin is chosen; and for the elastomer, ethylene-vinyl acetate copolymer is selected.

[0041] Furthermore, when carrying out stirring and mixing in S2, first perform low-speed mixing, then high-speed mixing, and heat the raw materials during the mixing process. The heating temperature is 80 - 100 °C, the high-speed mixing time is 5 - 9 min, and the low-speed mixing time is 2 - 3 min.

[0042] Furthermore, the twin-screw extruder in S3 includes three heating zones. The heating temperature in zone 1 is 140 - 150 °C, in zone 2 is 160 - 170 °C, and in zone 3 is 170 - 180 °C. The raw materials first enter zone 1 for preheating, then enter zone 2 for heating up, and finally are melted in zone 3. The melted raw materials enter the extrusion equipment.

[0043] Furthermore, the T-shaped die head in S4 includes a central feed pipe, which is connected to the discharge port of the twin-screw extruder. The central discharge pipe is connected to a distribution manifold. The distribution manifold divides the molten material into multiple flowing materials. The distribution manifold is connected to a transverse flow channel. The transverse flow channel guides the multiple flowing materials into the die lip structure. There is a flow channel adjusting device on the transverse flow channel. The flow adjusting device controls the thickness distribution of the film by adjusting the width or height of the flow channel. The die lip structure consists of two upper and lower metal plates with a narrow die lip gap in the middle, which is used to control the final thickness of the film. The final material is discharged through the die lip structure to form the film.

[0044] Furthermore, the cooling roll in S5 is connected to a cold water circulation device. The cooling temperature is 40 - 60 °C. The rotation speed of the cooling roll is adapted to the extrusion speed of the T-shaped die head to control the thickness of the film. The film thickness is 20 - 100 μm.

[0045] Furthermore, when carrying out traction and winding in S6, adjust the tension of the traction roll and the winding roll to ensure that the film is flat and without wrinkles. After winding is completed, perform width slitting on the film roll to cut it into a width suitable for winding wires and cables.

[0046] Furthermore, when carrying out quality inspection in S7, first use a thickness gauge to test the thickness of the film to ensure thickness uniformity, then detect the self-adhesion through a peel strength tester, and finally use a simulated ultraviolet irradiation device and a high and low temperature cycling device to test the environmental protection and durability of the film.

[0047] Further, after the quality inspection in S7, the qualified film rolls are wrapped with moisture-proof films and then stored in a sealed and dry manner.

[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An environmentally friendly self-adhesive packaging film for PVC wires and cables, characterized in that, It comprises raw materials counted by the following parts by weight: 50 - 80 parts of polyvinyl chloride masterbatch, 10 - 20 parts of environment-friendly plasticizer, 2 - 5 parts of stabilizer, 0.1 - 1 part of antioxidant, 0.1 - 1 part of ultraviolet absorber, 3 - 10 parts of tackifier, and 5 - 20 parts of elastomer.

2. A preparation method of an environmentally friendly self-adhesive PVC wire and cable packaging film, applicable to the environmentally friendly self-adhesive PVC wire and cable packaging film described in claim 1, characterized in that, It comprises the following steps: S1. Raw material preparation: Weigh the polyvinyl chloride masterbatch, environment-friendly plasticizer, stabilizer, antioxidant, ultraviolet absorber, tackifier, and elastomer according to the proportion. S2. Raw material mixing: First add the polyvinyl chloride masterbatch into the mixing equipment, and then successively add the stabilizer, antioxidant, ultraviolet absorber, environment-friendly plasticizer, elastomer, and tackifier and stir and mix them. S3. Plasticization of the mixture: After mixing, send the mixture into a twin-screw extruder, and make the material melt and plasticize through heating and the shearing force of the screw. S4. Extrusion molding: Install a T-shaped die head at the discharge end of the twin-screw extruder. The melted raw material enters the feed end of the T-shaped die head, and then forms a film structure through the plasticity of the T-shaped die head, and finally is discharged through its discharge end. S5. Cooling and shaping: The melt film extruded from the T-shaped die head enters the cooling equipment and is wound around the cooling roller of the cooling equipment. The film is quickly cooled and shaped by the cooling roller to form a transparent or semi-transparent film. S6. Traction and winding: Traction equipment is used to traction the cooled film. The traction equipment uses traction rollers to traction the film. The rotation speed of the traction rollers is adapted to the extrusion speed and the rotation speed of the cooling roller to avoid excessive stretching or relaxation of the film. Finally, the film is wound by a winding roller. S7. Quality inspection: Conduct quality inspection on the wound film.

3. The preparation method of an environmentally friendly self-adhesive PVC wire and cable packaging film according to claim 2, wherein: In S1, the polyvinyl chloride masterbatch selects high-purity PVC resin, the environment-friendly plasticizer selects epoxidized soybean oil, the stabilizer selects calcium-zinc stabilizer, the antioxidant selects phenolic antioxidant, the ultraviolet absorber selects UV-531, the tackifier selects terpene resin, and the elastomer selects ethylene-vinyl acetate copolymer.

4. The preparation method of an environmentally friendly self-adhesive PVC wire and cable packaging film according to claim 3, wherein: When carrying out stirring and mixing in S2, first carry out low-speed mixing, then carry out high-speed mixing, and heat the raw materials during the mixing process. The heating temperature is 80 - 100 °C, the high-speed mixing time is 5 - 9 min, and the low-speed mixing time is 2 - 3 min.

5. The preparation method of a PVC environmentally friendly self-adhesive wire and cable packaging film according to claim 4, characterized in that: The twin-screw extruder in S3 includes three heating zones. The heating temperature of the first zone is 140 - 150 °C, the heating temperature of the second zone is 160 - 170 °C, and the heating temperature of the third zone is 170 - 180 °C. The raw material first enters the first zone for preheating, then enters the second zone for heating up, and finally is melted by the third zone. The melted raw material enters the extrusion equipment.

6. The preparation method of a PVC environmentally friendly self-adhesive wire and cable packaging film according to claim 5, characterized in that: The T-die in S4 includes a central feed pipe, which is connected to the discharge port of the twin-screw extruder. The central discharge pipe is connected to a distribution manifold. The distribution manifold divides the molten material into multiple flowing materials. The distribution manifold is connected to a transverse flow channel. The transverse flow channel guides the multiple flowing materials into the die lip structure. A flow channel adjusting device is provided on the transverse flow channel. The flow adjusting device controls the thickness distribution of the film by adjusting the width or height of the flow channel. The die lip structure is composed of two upper and lower metal plates, with a narrow die lip gap left in the middle to control the final thickness of the film. The final material is discharged through the die lip structure to form a film.

7. The preparation method of an environmentally friendly self-adhesive PVC wire and cable packaging film according to claim 6, characterized in that: The cooling roll in S5 is connected to a cold water circulation device, and the cooling temperature is 40 - 60 °C. The rotation speed of the cooling roll is adapted to the extrusion speed of the T-die to control the thickness of the film, and the film thickness is 20 - 100 μm.

8. The preparation method of a PVC environmentally friendly self-adhesive wire and cable packaging film according to claim 7, characterized in that: In S6, during traction and winding, the tensions of the traction roll and the winding roll are adjusted to ensure that the film is flat and free of wrinkles. After winding is completed, the film roll is width-cut into a width suitable for winding wires and cables.

9. The preparation method of an environmentally friendly self-adhesive PVC wire and cable packaging film according to claim 8, characterized in that: In S7, when performing quality inspection, first use a thickness gauge to measure the thickness of the film to ensure thickness uniformity, then detect the self-adhesion through a peel strength tester, and finally use a simulated ultraviolet irradiation device and a high and low temperature cycling device to test the environmental friendliness and durability of the film.

10. The preparation method of a PVC environmentally friendly self-adhesive wire and cable packaging film according to claim 9, characterized in that: After the quality inspection in S7 is completed, the qualified film rolls are wrapped with a moisture-proof film and then stored in a sealed and dry manner.

Images