1 glass

Glass is an amorphous inorganic non-metallic material, generally made of a variety of inorganic minerals (such as quartz sand, borax, boric acid, barite, barium carbonate, limestone, feldspar, soda ash, etc.) as the main raw material, and a small amount of auxiliary raw materials are added. of. Its main components are silicon dioxide and other oxides. There are colored glass mixed with oxides or salts of certain metals to show color, and tempered glass made by physical or chemical methods. Sometimes some transparent plastics (such as polymethyl methacrylate) are also called agricultural production system glass.

2 processing

Processing refers to the renewal of goods; consignment processing goods refers to the business where the entrusting party provides raw materials and main materials, and the entrusting party manufactures goods and charges processing fees according to the requirements of the entrusting party. Processing is the process of transforming the transformed substance into a purposeful transformation according to certain preparatory procedures or laws. Processing may be a chemical process, it may be a physical process, or a compound process.

3 Paraffin

Also known as crystalline wax, a mixture of hydrocarbons with a carbon number of about 18-30, the main component is straight-chain alkanes (about 80%-95%), and a small amount of alkane with individual branches and long side chains Monocyclic cycloalkanes (the total content of the two is less than 20%). Paraffin wax is a flake or needle crystal obtained by solvent refining, solvent dewaxing, or freezing and squeezing dewaxing of the lubricating oil fraction obtained from the distillation of goods, and then deoiling and supplementary refining. According to the degree of refining, it can be divided into three types: fully refined paraffin, semi-refined paraffin and crude paraffin. Each type of wax is divided into different varieties according to the melting point, generally every 2 ℃, such as 52, 54, 56, 58 and other grades. Crude paraffin has a high oil content and is mainly used in the manufacture of matches, fiberboards, tarpaulins, etc. Fully refined paraffin and semi-refined paraffin have a wide range of uses. They are mainly used as components and packaging materials for foods, oral medicines and certain commodities (such as wax paper, crayons, candles, carbon paper), coating materials for baking containers, and used for fruit preservation , Insulate electrical components, improve rubber soothing aging and increase flexibility.