Beautiful transparent nylon

Research reports show that the current number of people with myopia in China is as high as 600 million, and glasses have become the equipment of many people. Accidentally dropping the glasses on the ground caused the lenses to break, which is frustrating. Glass frames and lenses made of transparent nylon, lightweight and non fragile, have become the current choice. If you see a salesperson dropping their glasses in front of you, don't be too surprised. They are demonstrating their performance.

 

Transparent nylon is a thermoplastic nylon with a microcrystalline or amorphous structure, which is a self-extinguishing material with an oxygen index of 26.8; The transparency of polycarbonate (PC) is close to that of polymethyl methacrylate (PMMA).

 

Transparent nylon crystal clear
It can be said that it is the beauty responsibility of the nylon family
The earlier transparent nylon was successfully developed by Dynamit Nobel, the company of Alfred Nobel, the founder of the Nobel Prize, in 1960. Due to its performance, it is widely used in automotive oil cups, transparent industrial reactors, glasses, frames, goggles frames, watch cases, strap, automotive accessories, oxygen breathing masks, headphone headphones, electronic packaging films, VR products, etc.
The Process of Transparent Nylon
1. The basic principle of nylon transparency:
High polymers have a crystal density similar to that of amorphous phases, and light does not refract or reflect at the crystal interface, or the crystal size is smaller than the wavelength of visible light
2. Principle of preparing transparent nylon
1) Reduce the crystallinity of nylon and prepare amorphous products;
2) Reduce the size of the crystal region to a range below the wavelength of visible light;
3) Adjusting the refractive index (Index of Refraction) of the crystalline and amorphous regions through blending, copolymerization, and other means;
3. Preparation method of transparent nylon

 

Transparent nylon classification
1. According to structure, transparent nylon is divided into three categories:
1) Semi aromatic nylon
It is produced by copolymerization of aromatic dicarboxylic acids with aliphatic diamines or aliphatic dicarboxylic acids with aromatic diamines, and is currently one of the most industrialized methods;
2) Aromatic transparent nylon
Prepared by copolymerization of aromatic dicarboxylic acids and aromatic diamines;
Representative products: 2-amino-6- (4-aminobenzene) -6-methylheptane and diphenyl Isophthalic acid to synthesize transparent nylon;
3) Aliphatic transparent nylon
Transparent nylon is prepared by copolymerization of aliphatic binary acid and aliphatic binary amine or long chain Lactam;
Main products: PA12, PA11, PA6/66 copolymers, PAPACMn, PAMACMn;
Raw materials for transparent nylon
Except for some varieties with semi aromatic or linear aliphatic structures, the main transparent nylon varieties contain aliphatic diamines.
1. Some aromatic acid raw materials

 

2. Some amine raw materials

 

3. Some amino acid raw materials

 

The Properties and Main Applications of Transparent Nylon
1. Electronic and electrical field
Due to its good insulation, high thermal deformation temperature, self extinguishing flame retardancy, creep resistance, high durability, and high transparency, it is suitable for the electronic and electrical fields, such as high-voltage switch shells, relay shells, battery seals, wiring terminals, and other products;
2. Automotive sector
Transparent nylon has good weather resistance, UV resistance, and allows the product to remain smooth and clean. Decorative and protective layers can be formed on the surfaces of automotive interiors, instrument panels, consoles, and other components through injection molding and surface lamination molding.
3. Mechanical field
Due to its high transparency, it can be used in the mechanical field to prepare injection molded components, such as fuel and compressed air filters, flow meters, level indicators, valve parts, measuring equipment, and guide rails.
4. Daily necessities
Due to its excellent transparency, light weight, non fragility, scratch resistance, chemical corrosion resistance, and stress cracking resistance, it can be used to make lens frames and lenses; Transparent, can be used to make daily necessities shells or transparent covers, such as juicer measuring cups, shells, etc.

 

Transparent nylon can be used to make lenses and Baby bottle