Aluminum door and window hardware accessories and door and window function analysis

Aluminum alloy door and window hardware accessories are an important part of it, and its performance and quality have an important impact on the function of doors and windows. Due to the continuous development of modern technology, door and window hardware accessories (handles, handrails, sliding hinges, slide rails, connectors, etc.) are also increasingly entering the market.

Modern building doors and windows can be roughly divided into plastic windows, composite windows, and aluminum alloy windows. Among them, aluminum alloy windows are the main building door and window products in China today, accounting for a considerable proportion in today's buildings. In fact, aluminum alloy windows have their superiority in terms of resistance to wind pressure, water tightness, air tightness and environmental protection.

Due to the characteristics of aluminum alloy which is easily passivated under natural conditions, when the hardware is made of general metal materials, the structure of aluminum alloy doors and windows will be a combination of ** very small anodes.

The adoption of new technologies, new processes and new materials is the only way to improve the corrosion resistance of door and window hardware. Foreign hardware manufacturers use physical vapor deposition (referred to as pvd, also known as vacuum plating) to produce hardware parts with excellent appearance and corrosion resistance. Vacuum plating has strong adhesion, and the coating is not easy to fall off; the diffraction is good, the thickness of the coating is uniform; the coating is dense, the pinholes are less; the treatment is easy before plating, the process is simple; the materials are used, and the pollution is harmless.

A simple substance, alloy or compound can be plated on a metal or non-metal surface. It has been widely used in the industrial sectors of aviation, aerospace, electronics and optics to prepare coatings with special properties. With the continuous improvement, large-scale and continuous vacuum coating equipment, and the development of coating technology, decorative coatings with good bonding strength, high abrasion resistance and high brightness can be obtained. Abroad, such as handles, hinges and other accessories, vacuum plating au, ag, al, zr, tin, lcrl8ni9, etc., to obtain an excellent external surface, so that handles, hinges and other single functional accessories become Use functional and decorative dual performance accessories.

Food Additives Refers to the production of food by the food manufacturer in the process of adding some chemicals, used to change the color of food, smell, or adjust the food taste and prolong the preservation time (preservatives, antioxidants), but some will Leading to cancer, such as many of the meat material added by some of the substances in the stomach due to protein, stomach acid, additives generated by the interaction of nitrite, can lead to physiological and chronic lesions. These chemicals are known as food additives.

main effect

Food additives have greatly contributed to the development of the food industry, and known as the soul of the modern food industry, which is mainly to the food industry to bring many benefits, its main role is as follows:

1. Preserving to prevent deterioration such as: preservatives can prevent food spoilage caused by microorganisms, extend the shelf life of food, but also have to prevent the pollution caused by microbial poisoning. Another example: antioxidants can prevent or delay the oxidation of food deterioration, to provide food stability and resistance to storage, but also to prevent the possible harmful oil automatic oxidation of the formation. In addition, can also be used to prevent food, especially fruits, vegetables, enzymatic browning and non-enzymatic browning. These are the preservation of food is of a certain significance.

2. Improving the sensory properties of food The color, smell, taste, shape and texture of food are important indicators of food quality. Appropriate use of colorants, colorants, bleach, edible spices and emulsifiers, thickeners and other food additives, can significantly improve the sensory quality of food to meet people's different needs.

3. Maintain or improve the nutritional value of food in food processing properly add some of the natural nutritional range of food nutrition enhancer, can greatly improve the nutritional value of food, which prevent malnutrition and nutritional deficiencies, promote nutritional balance, improve People's health level is of great significance.

4. Increased variety and convenience of food The market now has as many as 20,000 kinds of food for consumers to choose, although most of these food production through a certain packaging and different processing methods, but in the production process, some color , Fragrant, taste with the whole product, mostly to varying degrees to add the coloring, aroma, seasoning and even other food additives. It is these a lot of food, especially the convenience of food supply, to people's lives and work to bring great convenience. 

Now commonly used food pigments include two categories: natural pigments and synthetic pigments. Natural pigments come from natural, mainly extracted from plant tissue, and also include some pigments from animals and microbes. Synthetic pigment refers to the use of artificial chemical synthesis of organic pigment, mainly in coal tar separated from the aniline dye made of raw materials. In the course of a long period of Food Additive reporting process, because people do not recognize the harm of synthetic pigments, and synthetic pigments and natural pigments compared with bright color, strong coloring, stable nature and cheap, many countries in the The food processing industry generally uses synthetic pigments. With the development of society and the improvement of people's living standards, more and more people in the use of synthetic food in the food will not cause harm to human health questioned. At the same time, a large number of research reports that almost all of the synthetic pigment can not provide nutrients to the human body, some synthetic pigment and even endanger human health. Eat a fine snack, fast food lunch, fragrant hot dog, glance at the printing of exquisite packaging food on the nutritional table, you will find that each food has additive ingredients. It is understood that the conversion of fat, refined cereal products, salt, high fructose syrup four components in the processing of food is the most common, these ingredients harm the human health. Some if there are too much harm, such as: citric acid, aspartame, sodium Finland white pigment, vanillin, potassium ... basically no harm, as long as it is added But not excessive

Additives

Food Additive,Food Grade Glycine,Food Additive Ethyl Maltol,Nutrition Enhancers

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