Continuous production process for enabling silver metal to be firmly attached to aromatic special fiber filaments

Abstract

The invention discloses a continuous production process for enabling silver metal to be firmly attached to aromatic special fiber filaments, and relates to a silver plating method for continuously and uninterruptedly producing aromatic special fibers such as aramid fibers, PBO fibers and polyimide for 24 hours. The problems that high-strength fiber metal cannot out of a laboratory, stable long fibers with consistent parameters cannot be produced at one time, and thousands of meters of long fibers can be produced at one time are solved firstly; meanwhile, through the controllability of the production speed and various chemical electroplating parameters, the problems that the fibers are the same in length, different in required conductivity and different in coating thickness are solved; and the problem of mass production is solved, and the problems of friction resistance, aging resistance and fiber weldability of the produced aromatic special fiber silver-plated metal coating are further solved.

Description

technical field [0001] The invention belongs to the technical field of special fiber metallization, in particular to a continuous production process for firmly attaching silver metal to aromatic special fiber filaments. Background technique [0002] Aromatic fiber generally refers to a series of fibers containing aromatic rings in the main chain. Aromatic fibers mainly include aromatic polyamide fibers, aromatic polyester fibers, and aromatic heterocyclic fibers. Since most of these fibers have a rigid chain structure, they have high strength, modulus and good heat resistance, and play an important role in military, aerospace, aviation, flame retardant, fire prevention and civil applications. For example, aramid 1414 has extremely high strength, which is 5-6 times that of high-quality steel, its modulus is 2-3 times that of steel or glass fiber, its toughness is 2-3 times that of steel, and its density is less than 1 / 3 that of steel. 5. It has a very wide range of continuo...

AI Technical Summary

Problems solved by technology

There are many problems in the various patented technical methods of existing fiber metallization, which cannot be applied to the actual mass production stage. Customized control, etc.

For example: Chinese patent CN106498715A, use acetone solution to clean, 10-60min, utilize mixed organic polar solvent to swell for 1-4 hours, immerse in silver nitrate solution for 1-2 hours, then reduce for 0.5-1 hour, use acetone in the preparation process, easy It is flammable, explosive, volatile, and will cause anesthesia to the human central nervous system. Long-term contact will cause dermatitis. Output capacity; Chinese patents CN105133301A, CN104894846A, CN104894539A, etc. perform electroless nickel plating on the basis of the above-mentioned CN106498715A treatment, but still cannot solve the problem of coating adhesion, and the time is too long to achieve continuous mass production

Chinese patent CN101705614B uses a mixture of dimethyl sulfoxide and sodium hydride for coarsening. The mixture of these two substances can easily cause combustion or explosion, especially when water is encountered during the preparation of silver-plated aramid fiber, which is very dangerous and slightly Inadvertently, dangerous accidents such as fire and explosion will be caused, and this coarsening method will greatly damage the strength of aramid fiber

Chinese patent CN101705615B uses 20% sulfuric acid for roughening, which cannot cause any surface treatment on the aramid fiber at all, and cannot form micropores or cracks, so that the combination of metal and fiber substrate cannot be achieved, and every step must be stopped For a long time, continuous production cannot be achieved, and the subsequent electroless nickel and electroless copper plating cannot form a firm composite layer on the smooth fiber surface, which cannot meet the requirements of practical applications.

Tiannuo Optoelectronics patent CN103668944B, the resistivity of the prepared silver-plated aramid fiber is ≤10 5 Ω×cm, the resistivity is too large to play its due role in practical applications

Chinese patent CN104532553A The silver-plated aramid fibers prepared by this method still cannot meet the requirements of practical application, and the preparation time is more than 3 hours, so it cannot be continuously produced, resulting in high production capacity.

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