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The spinneret is one of the important parts of the spinning machine. Its function is to turn the viscous polymer melt or solution through the micropores into a trickle with a specific cut surface, and pass through the solidification medium. Or the coagulation bath solidifies to form filaments. In the spinning process, the spinneret will be blocked by mechanical impurities, carbon fiber, gel, etc., the spinneret hole, when the spinneret hole is partially blocked, the spinning solution will overflow on the outer surface of the spinneret/plate, resulting in raw filament The size is uneven and there are problems such as fineness and hairiness. When the spinneret hole is completely blocked, it will greatly increase the rate of fiber breakage, which has a great impact on the fiber quality, so the spinneret must be cleaned regularly.
Plastic Floor Mat Mold,Nonstandard Chemical Fiber Spinneret,High Abrasion Resistance Spinneret,Spinneret Plate Changzhou Jier Precision Machinery Manufacturing Co., Ltd. , https://www.jier-spinneret.com
The video signal transmission cable shall meet the following requirements: Baseband transmission or RF transmission shall be adopted according to the image signal, and the selection of video cable or RF cable shall be determined; the protective layer of the selected cable shall be suitable for the requirements of the cable laying method and the use environment (such as climate and environment, whether or not Harmful substances, interference sources, etc.); outdoor lines, coaxial cables with inner diameter of outer conductor of 9mm should be selected, and polyethylene jackets should be used; when the indoor distance does not exceed 500m, the coaxial cable with outer conductor inner diameter of 7mm should be selected and adopted. Fireproof PVC jacket; When the distance between the terminal equipment and equipment room is short, a coaxial cable with an outer conductor inner diameter of 3mm or 5mm and a densely braided copper outer conductor should be selected; the video coaxial of the elevator car Cables should use elevator-specific cables.
<br> <br> fiber optic cable should meet the following requirements: a transmission mode fiber optic cable, to follow a given transmission distance. Single-mode optical fiber should be used for long distances. Multi-mode optical fibers should be used when the distance is short. The number of optical fiber cores should be determined according to the number of monitoring points and the distribution of monitoring points, and attention should be paid to the margin; the structure of the optical cable must be maintained. The allowable minimum bending radius, maximum tensile strength and other mechanical parameters shall meet the requirements of the construction conditions; the protective layer of the optical cable shall be suitable for the laying of the optical cable and the requirements of the use environment.
In recent years, due to the rapid economic growth of the emerging Asian countries, the global cable production center has shifted to Asia, driving the rapid development of the cable industry in countries such as China, India, Vietnam, the Philippines and Egypt. At the same time, due to the unification of Europe and relatively low manufacturing costs in Central and Eastern Europe, the wire and cable industry has also grown rapidly. During the "12th Five-Year Plan" period, China's new energy power generation industry will be greatly developed, especially the rapid growth of photovoltaic power generation industry, will inevitably inject new vitality into China's wire and cable industry. Coupled with the introduction of subsidy policies for distributed photovoltaic power generation projects, it is expected that the demand for photovoltaic cables and photovoltaic devices will be boosted.
In the huge domestic and international markets, China's wire and cable companies can only develop and produce products in a targeted manner only if they clearly understand the standards and requirements of each market. For domestic cable manufacturers, the vicious competition in the market, the lack of corporate funds, weak independent innovation capabilities, and the lack of brand advantages have become major bottlenecks restricting their development. In order to further enhance the brand advantage and promote product exports, product certification has been included in the work schedule of more and more cable manufacturers. For cable manufacturers, responding to product standards in different markets is an unavoidable challenge in their business development.
Transmission cable
Transmission cable attenuation, bending, shielding, moisture and other performance should meet the overall requirements of the system design, and meet the technical requirements of the corresponding product standards. Under the premise of meeting the above requirements, cables with fine diameter and easy construction should be selected.
Alarm signal transmission line
The pressure resistance of the alarm signal transmission line should not be lower than AC250V, and should have sufficient mechanical strength; the minimum cross-sectional area of ​​the copper core insulated conductors and cable cores should meet the following requirements: the insulated conductor laid through the pipe, the minimum cross-sectional area of ​​the core should not be Less than 1.00mm2; Insulated wire laid in the wire duct, the minimum cross-sectional area of ​​the core should not be less than 0.75mm2; The minimum cross-sectional area of ​​a single strand core of a multi-core cable should not be less than 0.50mm2.
Video signal cable should meet the requirements
Video signal transmission cable