abc cable sans 1418

Strict environmental protection is conducive to aluminum promotion

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1. Huge aluminum processing capacity.
From 2006 to 2016, the accumulated investment in fixed assets of nonferrous metal alloy manufacturing and calendering industry exceeded 2201.4 billion yuan, with an average annual growth rate of 26.97%, of which the proportion of aluminum processing investment basically remained above 45%. A large amount of investment has led to the rapid growth of production capacity (at present, China’s aluminum extrusion production capacity accounts for 76% of the world’s total production capacity; the casting hot rolling production capacity accounts for about 59% of the world’s total production capacity; and the twin roll continuous casting and rolling strip production capacity accounts for about 67.5% of the world’s total production capacity). The export volume of aluminium sheet, aluminum foil and aluminum strip also ranks among the top in the world, with the largest number of world-class equipment.

At present, China has the world’s largest and full range of aluminum surface treatment production lines, the largest number of Sigmak heavy extruders, CVC cold rolling mills, the largest number of Ashenbach aluminum foil mills, and the largest number of hot and cold continuous rolling mills. However, how to make full use of these advanced equipment and play their due role will test the creativity, imagination and ability of industry personnel. Otherwise, it will add a heavy burden.

2. Homogeneous price competition is becoming increasingly fierce.
A lot of investment is focused on high-end aluminum strip and large extrusion products, resulting in structural overcapacity. The more high-end products, the more excess. As a result, product homogeneity competition and price war become increasingly fierce. This phenomenon is widespread from low-end products to high-end products. For example, in recent years, due to homogeneous competition, the processing cost of some products with high added value has become lower and lower. For example, the processing cost of CTP printed board base has dropped from 12000 yuan/ton to 3800 yuan/ton; The processing cost of aluminum alloy can materials has decreased from the original 20000 yuan/ton to less than 4000 yuan/ton; The processing cost of aluminum alloy profiles for high-speed railway carriages has decreased from 50000-70000 yuan/ton to 10000-15000 yuan/ton.

3. There is a good policy environment for the development of aluminum processing.
The Made in China 2025 issued in 2015 and the 13th Five Year Development Plan for Nonferrous Metals Industry to be released clearly propose to accelerate the development of high-performance light alloy materials. As the most important lightweight, energy-saving, renewable and environment-friendly material, aluminum alloy is the first choice in aviation, automobile, construction, electronics and packaging industries.

The General Office of the State Council recently released the Guiding Opinions on Creating a Good Market Environment, Promoting the Restructuring of the Non ferrous Metals Industry, Promoting Transformation and Increasing Benefits, which also clearly proposed to further increase the consumption of non-ferrous materials in aviation, automotive, construction, electronics, packaging and other fields, and focus on the development of aluminum alloy plates for passenger vehicles, aviation and marine use.

Therefore, with the deepening of supply side structural reform, the business environment for the development of China’s aluminum processing industry will be improved.

The Ministry of Industry and Information Technology said that while supporting the expansion of aluminum consumption in traditional areas, it would continue to implement major special projects such as technological transformation, foundation strengthening projects and new materials closely related to the aluminum processing industry, and would also increase targeted and continuous support for key areas such as aviation aluminum materials and car panels. The Ministry of Industry and Information Technology has also successively introduced some specific policies and measures to support the expansion of aluminum application in recent years. For example, at present, aluminum alloy semi trailers and tank cars can enjoy the policies of energy conservation and emission reduction in transportation, recommended models for highway drop and hook transportation, vehicle and vessel tax reduction and exemption. Aluminum alloy heat insulation profiles, color aluminum plates, aluminum alloy building templates, etc. are listed as green building materials.

Analyze how to distinguish the quality of optical cables

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1. Ointment. The ointment mainly includes fiber paste and aerial bundled cable(abc) 7870. Under normal circumstances, the fiber paste should fill the entire loose tube, and the cable paste should fill every gap of the optical cable core under pressure. Nowadays, there are ways to fill the fiber paste half full or less. For the cable paste, some just apply a layer on the outside of the cable core, and some are not filled between the two ends of the optical cable. This will make the optical fiber not well protected, affect the transmission performance such as optical fiber attenuation, and the poor waterproof performance can not reach the national standard. Once the optical cable accidentally sees water, the entire link will seep and be scrapped. Under normal circumstances, even if there is an accidental seepage, you only need to repair the part of the seepage. (The national standard requires water blocking performance: three meters of fiber optic cable, one meter of water column pressure, no water seepage for 24 hours.) If you use poor ointment, the above problems will also occur, and it may be due to poor thixotropy of the ointment , The optical fiber will cause microbending loss, and the transmission characteristics of the entire link will be unqualified; if the grease is acidic, it will react with the metal material in the optical aerial bundled cable SANS 1418 to precipitate hydrogen molecules, and the attenuation of the optical fiber will increase rapidly when it encounters H, causing the entire The link is interrupted for transmission.

2. Sheath. The fiber optic cable sheath must not only adapt to many different and complex climate environments, but also ensure long-term (at least 25 years) stability. The optical cable sheath must not only have a certain strength, low thermal deformation, abrasion, water permeability, thermal shrinkage and friction coefficient, but also strong resistance to environmental stress and good material processing performance. Although the sheath material that is rarely used or poorly used can pass the factory acceptance, cracking and water seepage will occur after a period of use due to quality defects. It will be more serious if recycled plastic is used to replace the high-quality polyethylene sheath material. The fiber optic cable made of high-quality sheathing material has a smooth, bright, uniform thickness and no bubbles after the cable is formed. Otherwise, the fiber optic cable skin will be rough, and because there are many impurities in the raw material, you can find that the fiber optic cable skin is very small. Wow, and because of its thin thickness, the overall outer diameter of the optical cable will be much smaller than that of a high-quality optical cable. Indoor optical cables are generally made of high-quality flame-retardant polyvinyl chloride. They should have a smooth, bright appearance, good flexibility, and easy peeling; otherwise, they will have poor skin finish and easily adhere to tight-fitting fibers and aramid.

3. Steel belt and aluminum belt. The steel strips and aluminum strips in the optical cable are mainly used to protect the optical fiber from mechanical side pressure, moisture resistance, etc., and better optical cables generally use chrome-plated steel strips. Inferior fiber optic cables use ordinary iron sheet or black sheet (uncoated steel strip) with rust-proof treatment on only one side instead of chrome-plated steel strip. It is easy to separate from the sheath to form a comprehensive bonding layer, and the moisture barrier performance is also very poor; some use tin-plated steel strips instead of chrome-plated steel strips. The surface of the tin-plated steel strips, bubbles, etc. are inevitable. Therefore, it is prone to corrosion under humid atmosphere and surface condensation or water immersion conditions, especially under acidic conditions. The tin-plated layer has poor heat resistance, and the melting point is only 232 degrees Celsius. In the application, due to the high temperature when the sheath is extruded, the peel strength is uncertain, which affects the moisture resistance of the optical aerial bundled cable(abc) SANS 1418 standard. The melting point of chromium is 1900 degrees Celsius, and its chemical properties are very stable. It will not rust when placed in the air or immersed in water at room temperature. It has very good corrosion resistance. Because the surface is easily oxidized to form a passivation layer, it has good environmental resistance. For aluminum tapes, unqualified hot-sticking film-coated aluminum tapes are generally used instead of casting-coated aluminum tapes, which will also affect the performance of the optical cable.