PVC material for heat-resistant insulated communication cable
The PVC material prepared by specific formulation and process solves the problem of heat resistance and flame retardancy of polyvinyl chloride network wires, achieving high-efficiency flame retardancy and improved mechanical properties, reducing production costs and improving the material's recyclability and processability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SUZHOU EDWARD PETROCHEM CO LTD
- Filing Date
- 2024-12-31
- Publication Date
- 2026-06-30
AI Technical Summary
Existing technologies struggle to improve the heat resistance and flame retardancy of PVC network wires without compromising material properties, and traditional cross-linking methods are complex and energy-intensive, leading to product instability and high costs.
A PVC material formulation with specific component ratios is used, and heat-resistant insulating cable material is prepared through high-speed mixing and twin-screw granulation processes to avoid radiation cross-linking and achieve efficient flame retardancy and improved mechanical properties of the material.
The prepared PVC material exhibits CMR flame retardancy at 125℃, superior physical and mechanical properties, and is easy to process, reducing production costs. The material is recyclable and reusable, and the wire has a high surface finish and good flexibility.
Smart Images
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Abstract
Description
Technical Field
[0001] This invention relates to a cable material, and more particularly to a heat-resistant insulated PVC material for communication cables. Background Technology
[0002] Polyvinyl chloride (PVC) is a material with low temperature resistance and flame retardancy. When external or internal faults occur during operation, the manufactured network cables are prone to sol-gel formation and combustion due to insufficient temperature resistance and flame retardancy. To reduce losses from these failures, special skin coupling agents and flame retardant materials need to be added to the material to improve its heat resistance and flame retardancy. Traditional PVC network cable materials can only achieve a maximum long-term temperature resistance of 105℃. Traditional PVC network cables are extremely prone to sol-gel cracking and fire, easily generating large amounts of smoke and causing environmental pollution.
[0003] Currently, most 125℃ flame-retardant insulation materials on the market are cross-linked by radiation. However, this process causes significant damage to the material, easily leaving residual components inside. Another type is cross-linked silane polyolefin material. This type requires a two-step cross-linking process, which is more complex and time-consuming. Two-step silane polyolefin materials need to be extruded separately, and then mixed again during wire and cable production. The resulting cables require boiling or steaming to achieve the cross-linking reaction. The large amount of moisture reduces the material's mechanical properties, consumes more energy, and results in extremely unstable flame-retardant performance, leading to significant instability in product quality. Summary of the Invention
[0004] To address the aforementioned technical problems, this invention provides a PVC material for heat-resistant insulated communication cables.
[0005] Therefore, the technical solution adopted by this invention is: A heat-resistant insulated PVC material for communication cables comprises the following components and their weight percentages: Polyvinyl chloride 45-55; Stabilizer 5-10; Plasticizer 15-25; Antimony trioxide 3-8; Aluminum hydroxide 10-15; Magnesium hydroxide 20-30; Smoke suppressant 1-5; Coupling agent 1-3; IPPP 10-20.
[0006] As a further improvement to the above technical solution, the following components and their weight percentages are included: Polyvinyl chloride 50; Stabilizer 8; Plasticizer 20; Antimony trioxide 5; Aluminum hydroxide 12.5; Magnesium hydroxide 25; Smoke suppressant 3; 1.5g of skin coupling agent; IPPP 15.
[0007] A method for preparing heat-resistant insulated PVC material for communication cables includes the following steps: The first step involves sequentially adding polyvinyl chloride, plasticizer, stabilizer, aluminum hydroxide, antimony dioxide, magnesium hydroxide, smoke suppressant, skin coupling agent, and IPPP into a high-speed mixer for high-speed mixing. After high-speed mixing for 15-25 minutes or until the temperature of the mixture reaches 130-140℃, the stirred material is obtained. The second step is to cool the mixed material to 80-105℃ and add it into a twin-screw granulator. After being air-cooled and hot-cut by the twin-screw granulator, CMP flame-retardant insulating cable material is obtained.
[0008] As a further improvement to the above technical solution, the temperature of each zone in the twin-screw granulator is set as follows: 170°C for the feeding zone, 183°C for the plasticizing zone, and 193°C for the die head.
[0009] The advantages of this invention are: The product obtained by this invention is lightweight, has good physical and mechanical properties, and excellent mechanical balance; it can meet the working requirements of 125℃ CMR flame-retardant insulation material for network cables without radiation cross-linking; compared with traditional irradiated cross-linked polyolefin halogen-free flame-retardant cable materials above 125℃, this product has superior comprehensive performance, such as better flame retardancy, good thermal stability, and no dripping; compared with thermosetting PVC and other materials, the waste can be recycled and reused, indirectly reducing production costs; it is easy to process, can be produced with a traditional PVC wire extruder, and has a good wire extrusion speed, excellent surface finish of the extruded wire, high wire flexibility, and thin wire wall. Detailed Implementation
[0010] The embodiments described in this invention are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.
[0011] A heat-resistant insulated PVC material for communication cables comprises the following components and their weight percentages: Polyvinyl chloride 45-55; Stabilizer 5-10; Plasticizer 15-25; Antimony trioxide 3-8; Aluminum hydroxide 10-15; Magnesium hydroxide 20-30; Smoke suppressant 1-5; Coupling agent 1-3; IPPP 10-20.
[0012] As a further improvement to the above technical solution, the following components and their weight percentages are included: Polyvinyl chloride 50; Stabilizer 8; Plasticizer 20; Antimony trioxide 5; Aluminum hydroxide 12.5; Magnesium hydroxide 25; Smoke suppressant 3; 1.5g of skin coupling agent; IPPP 15.
[0013] A method for preparing heat-resistant insulated PVC material for communication cables includes the following steps: The first step involves sequentially adding polyvinyl chloride, plasticizer, stabilizer, aluminum hydroxide, antimony dioxide, magnesium hydroxide, smoke suppressant, skin coupling agent, and IPPP into a high-speed mixer for high-speed mixing. After high-speed mixing for 15-25 minutes or until the temperature of the mixture reaches 130-140℃, the stirred material is obtained. The second step is to cool the mixed material to 80-105℃ and add it into a twin-screw granulator. After being air-cooled and hot-cut by the twin-screw granulator, CMP flame-retardant insulating cable material is obtained.
[0014] As a further improvement to the above technical solution, the temperature of each zone in the twin-screw granulator is set as follows: 170°C for the feeding zone, 183°C for the plasticizing zone, and 193°C for the die head.
[0015] The performance test results are as follows:
[0016] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A heat-resistant insulated PVC material for communication cables, characterized in that, Includes the following components and their weight percentages: Polyvinyl chloride 45-55; Stabilizer 5-10; Plasticizer 15-25; Antimony trioxide 3-8; Aluminum hydroxide 10-15; Magnesium hydroxide 20-30; Smoke suppressant 1-5; Coupling agent 1-3; IPPP 10-20.
2. The PVC material for heat-resistant insulated communication cables according to claim 1, characterized in that, Includes the following components and their weight percentages: Polyvinyl chloride 50; Stabilizer 8; Plasticizer 20; Antimony trioxide 5; Aluminum hydroxide 12.5; Magnesium hydroxide 25; Smoke suppressant 3; 1.5g of skin coupling agent; IPPP 15.
3. A method for preparing the PVC material for heat-resistant insulated communication cables as described in claim 1, characterized in that, Includes the following steps: The first step involves sequentially adding polyvinyl chloride, plasticizer, stabilizer, aluminum hydroxide, antimony dioxide, magnesium hydroxide, smoke suppressant, skin coupling agent, and IPPP into a high-speed mixer for high-speed mixing. After high-speed mixing for 15-25 minutes or until the temperature of the mixture reaches 130-140℃, the stirred material is obtained. The second step is to cool the mixed material to 80-105℃ and add it into a twin-screw granulator. After being air-cooled and hot-cut by the twin-screw granulator, CMP flame-retardant insulating cable material is obtained.
4. The method for preparing a heat-resistant insulated communication cable PVC material according to claim 3, characterized in that, The temperature settings for each zone of the twin-screw granulator are as follows: 170°C for the feeding zone, 183°C for the plasticizing zone, and 193°C for the die head.