The food and packaging machinery industry is an industry that provides equipment for the food industry. It was formed in the late 1970s and early 1980s. After rapid development in the 1980s and rapid growth in the 1990s, it has been produced through the introduction, digestion, and localization. Enter the crucial period of structural adjustment, product quality upgrade and improvement of innovation capabilities.
Automatic packaging machines are generally divided into semi-automatic packaging machines and automatic charter machines. The machines that manually supply the packaging materials (containers) and contents, but can automatically complete other packaging processes are called semi-automatic packaging machines; machines that automatically complete the main packaging processes and other auxiliary packaging processes are called full-automatic packaging machines.
In the past 5 years, the food packaging machinery industry has grown at an average annual growth rate of 11% to 12%. In 2005, the total output value of the food and packaging machinery industry was nearly 40 billion yuan, which has become one of the 14 industries in the machinery industry system, which has initially satisfied China. The needs of the food industry. At present, there are more than 5,000 manufacturers of packaging equipment in China, with an annual output of more than 200,000 sets, and more than 3,700 varieties of products. In addition to meeting domestic needs, there are a certain number of exports. In 2002, the total import and export of food and packaging machinery in the country reached 2.14 billion U.S. dollars, of which 1.54 billion U.S. dollars were imported and 600 million U.S. dollars were exported, and imports still exceeded exports.
The main problems in food packaging machinery are:
The gap with foreign products is big. China's food packaging machinery has made great achievements in recent years, but there are still 20 years of technological gaps compared with foreign products. There are many single machines and complete sets; there are many mainframes and few auxiliary machines; there are many products with low technological content, few products with high technology, high added value, and high productivity; there are many general models, and there are few special requirements and special types of materials processing.
The quality gap of mechanical products mainly manifests itself in:
Poor stability and reliability, backward modeling, rough appearance, short service life of basic parts and accessories, and short failure-free operation time, most products have not yet established reliability standards, and their product performance is low compared to similar foreign products. High energy consumption. The hourly production capacity of better products is only 1/2 of the advanced level in foreign countries, and energy consumption is more than double the level of foreign advanced products. At present, only 5% of China's food and packaging machinery have reached the level of foreign countries in the 1990s, 20% have reached the level of foreign 80s, and 60% have reached the level of foreign countries in the 1970s. Research and development capabilities are low.
Most of the food processing and packaging machinery manufacturing enterprises in China belong to SMEs and basically do not have independent research and development capabilities. Due to the lack of scientific research investment, the experimental conditions of the institutes and institutions of higher learning are not perfect, resulting in products on the Chinese market that are mainly localized in imitation, surveying and mapping, or slightly modified. The main technology of the industry depends on foreign countries, and products with independent intellectual property rights are less. . According to regulations, investment in technology development can account for 3% of sales revenue, but most companies have invested little money to ensure the development of new products and technologies. The lack of innovation in product development and backward development means that they cannot provide timely products in response to market demand.
Tert-Butyl peroxybenzoate (TBPB) a chemical compound from the group of peresters. It is often used as a radical initiator in polymerization reactions, such as the production of LDPE from ethylene, and for crosslinking, such as for unsaturated polyester resins.
TBPB is a low volatility ,high purity,liquid, aromatic peroxuester.it is effective as medium of a broad spectrum of monomers e.g .styrene.ethylenn,acrylics.it is also used to cure (copolymerzation) unsaturated resins .
TBPB is a clear light yellow liquid, which is little soluble in water but well in many organic solvents such as ethanol or phthalate.
As peroxo compound, TBPB contains about 8.16 wt% of active oxygen and has a self accelerating decomposition temperature (SADT) of about 60 °C. The SADT is the lowest temperature at which self-accelerating decomposition in the transport packaging can occur within a week, and which should not be exceeded while storage or transportation.[2] TBPB should therefore be stored between minimum 10 °C (below solidification) and maximum 50 °C. Dilution with a high-boiling solvent increases the SADT. The half-life of TBPB, in which 50% of the peroxy ester is decomposed, is 10 hours at 104 °C, one hour at 124 °C and one minute at 165 °C. Amines, metal ions, strong acids and bases, as well as strong reducing and oxidizing agents accelerate the decomposition of TBPB even in low concentrations.[ However, TBPB is one of the safest peresters or organic peroxides in handling. The main decomposition products of tert-butyl peroxybenzoate are carbon dioxide, acetone, methane, tert-butanol, benzoic acid and benzene.
Initiator Tbpb,Tert-Butyl Peroxybenzoate Formula,Tert-Butyl Peroxybenzoate Activation,Tert Butyl Peroxybenzoate Formula
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