Rare earth is used in light industry and textile industry

Rare earth is used in light industry and textile industry

The application of rare earth in textile and leather industry

The use of rare earth in textile and leather industry is a unique field of rare earth application developed by Chinese technologists. After years of research and promotion, the process technology has been perfected, and has achieved obvious economic and social benefits.

Rare earth is mainly used in textile and leather industry for leather tanning, fur dyeing, cotton spinning, wool spinning and synthetic fiber printing and dyeing etc. Because rare earth staining is based on the original dyeing process and equipment, a new process has been developed, which lays the foundation for the promotion of rare earth dyeing process.

1. rare earth help dyeing
Rare earths (mainly with rare earth chloride) to add in the acid dye (including strong acid and weak acid and acid mordant dyes), assisted dyeing effect, can improve the dyeing rate, adjusting the affinity of dyes and fibers, improve the color fastness, improving the colour and lustre of fiber, appearance quality and the degree of soft, saving dyes and reduce environmental pollution, reduce labor intensity and lower power consumption, etc.

The application of rare earth dyeing has been popularized for more than 10 years. Rare earth has been used in wool, acrylic, pure cotton, nylon, silk, viscose, artificial cotton, flax, ramie and other natural fibers, chemical fiber and blending dyeing and dyeing. Hundreds of textile enterprises in more than 20 provinces, cities and autonomous regions have promoted the technology of rare earth assisted dyeing and achieved remarkable economic and social benefits. With the use of rare earth help dyeing, the dyeing rate is increased, the dosage of auxiliaries is reduced, the amount of water is reduced, and the sewage discharge and treatment costs are reduced and reduced.

2. rare earth assisted tanning
Rare earth aid tanning can not only improve the quality of leather, but also reduce the cost. The use of rare earth mixed tanning tanning leather can replace some red vanadium and reduce the amount of chromium, and reduce the pollution of waste water in the leather industry.

With rare earth mixture tanning tanning products, leather surface closely, meticulous soft pedal, fur colour and lustre is light and fluffy, feel is good, fastness to washing, odor reduction, tensile strength and split strength and chemical properties all reach the level of pure chrome tanning, has the remarkable economic benefit and social benefit.

The application of rare earth in plastics industry
Since July 5, the application of rare earth in this field has made great progress. China has developed rare earth plastic stabilizer and rare earth added MC nylon.

The plastics industry is an important basic raw material industry. Rare earth compounds are mainly used as plastic AIDS in the plastics industry. Plastic auxiliaries can not only improve the processing performance and performance of plastics, but also reduce their production cost, reduce energy consumption and improve production efficiency. Therefore, auxiliaries have an important role to play in the development of plastic industry. Rare earth can be used as a thermal stabilizer for polyvinyl chloride plastics, eliminating the pollution of lead, cadmium and other heavy metals and improving product performance. As a modifier, rare earth can improve the physical mechanical and chemical properties of the important MC nylon engineering plastics.

The rare earth stabilizer for PVC processing is a rare earth application which has been developed in recent years. The product is mainly raw material with 30% of lanthanum oxide and has been sold, but the production is small and the production scale is small. Some technical problems have not been solved completely. Some, called rare earth stabilizers, actually only add a small amount of rare earths to their products. China's PVC plastic materials are mainly used for civil building materials, and window of plastic steel doors and Windows are its main products.

According to the state building energy conservation plan, the state will encourage the development of plastic doors and Windows, restrict the use of aluminum alloy doors and Windows, and from 2000, aluminum alloy doors and Windows will be replaced by plastic doors and Windows. With the development of plastic processing industry in China, rare earth will have a big development in this field. According to the calculation of 100 domestic plastic building materials enterprises, 10,000 tons of rare earth stabilizer is needed every year and 3,000 tons of rare earth are needed.

The red pigment used in plastics industry is inorganic and organic. Inorganic salts have cadmium, lead and iron salts. Cadmium salt is bright red, but cadmium is poisonous, and it is increasingly restricted by environmental protection. Lead salt is orange and is not suitable for poisoning. The iron salts are reddish and not bright. Organic red color is bright, but its covering ability, dispersion ability, anti-seepage and thermal stability are inferior to inorganic pigment. Inorganic pigment is not easy to fade and deform. The French company rodia has developed the rare earth sulphide Ce2S3 inorganic red pigment, which is nontoxic and has no environmental protection. It has been tried in polypropylene plastics.

According to the report, only in the us and Europe, there are 87% and 80% respectively to cadmium pigments used in plastics, the two market each year to more than 2100 tons of paint, and plastic annual consumption of more than 43 million tons of the world. Rare earth sulphide pigments will provide a significant new market for rare earths.

In addition, we should actively carry out research on plastic functional additives, such as using the fluorescence properties of rare earth compounds to make light plastic. Using rare earth magnetic material to make magnetic plastic; The optical conversion performance of rare earth compounds is made to make plastics with the properties of optical transformation. These products are not only widely available in the market, but are also urgently needed by the society and people's lives.

Application of rare earth in paint industry
Rare earth paint drier. Paint is a widely used paint, from Bridges and houses to vehicles and machinery, from family doors and Windows to furniture to colorful children's toys.

Paint drier is an indispensable assistant in the paint industry. If you do not add the drier, the paint film will be hard to dry naturally. It will take days or even months, but the addition of the drier can be shortened to a few hours and can be dried into a film. The main disadvantages of paint manufacturing industry are the cobalt/lead series drier, which is toxic and prone to precipitation, while cobalt is expensive and our country has few resources and is mainly imported. In particular, lead, due to its high toxicity, can harm the health and environment of the human body. There are strict limits on the amount of lead used in paint, especially in children's toys and furniture.

Starting in the 1980 s, China's science and technology workers have developed a series of rare earth paint drier, has been successfully used in five categories of dozens of varieties of paint production, at present, China's annual consumption of rare earth drier more than 3000 tons, all kinds of paint application 15 ~ 200000 tons. Rare earth drier usually USES rare earth fatty acid and rare earth naphthenic acid complex as raw material.

They can partially or even completely replace the lead manganese zinc and calcium in traditional drier, which can significantly reduce the amount of cobalt, which can be made either low lead or lead-free paint, and can simplify the production process. The paint color is light, the adhesion is strong, the paint film is bright dry, the paint quality is obviously improved, it is a new road for the paint manufacturing industry in China, it has good economic and environmental benefits.

Application of rare earth in building materials
The construction industry is one of the pillar industries in China, and rare earth has a broad application prospect in the construction industry. The material demand in the construction field is diversified and highly efficient. High strength low alloy steel, stainless steel containing rare earth in architecture is widely used in high-rise buildings, stadium, railway engineering, bridge engineering, harbour and offshore oil derrick and large hydropower station.

Shanghai has already used tons of rare earth steel for yangpu bridge, O riental pearl TV tower, viaduct highway and large stadium project. In addition, there are rare earth elements as additives of calcined cement, adding 0.02% ~ 0.02% of rare earth oxides can replace cement raw material in whole or in part of iron powder, can significantly improve the strength of the cement and yield, reduce energy consumption and production cost. In the construction industry, rare earth insulation materials, rare earth waterproof and heat preservation coatings and high efficiency buildings have excellent insulation and waterproof effects.

The application of rare earth in light industrial textile industry is very promising, and the market has obvious Chinese characteristics. > ", the application of rare earth in this area has a rapid development, China has developed a rare earth drier, rare earth thermal insulation material, rare earth plastic stabilizer, all kinds of rare earth organic inorganic catalyst, and other dozens of rare earth additives.

At present, China's rare earth drier production technology is very mature, it is used in paint industry, it instead of cobalt and other traditional organic metal drier has the advantages of lead-free low toxicity, at present, China's rare earth drier to 7000 tons, has great market potential.