How to Solve the Problems in the Development of Flame Retardant Bellows
Flame-retardant bellows have been developed and studied for more than 80 years, especially for the demand of polymer industry for flame-retardant bellows in recent 40 years. It has become a series of products. The development trend of global flame retardant bellows industry is toward non-toxicity, harmlessness, high efficiency, specialization and compounding.
Modified masterbatch filled with flame retardant bellows is an important part of the processing industry of flame retardant bellows. It covers many fields of flame retardant bellows. Although it develops rapidly, there are some outstanding problems, mainly in the following aspects.
1. Because of the misunderstanding of filling modification, some people and enterprises think that filling modification is to add a large amount of inorganic powder to plastic products to reduce the cost of flame-retardant bellows, reduce the quality of flame-retardant bellows, ignore its modification function, and ignore its application effect in flame-retardant bellows.
2. Due to the rapid development of filling and modifying masterbatch manufacturers, disorderly competition in the market, and improper price reduction to seize market share, the factory then reduces resin content, additive dosage or additive quality, so that the product can not guarantee quality, affecting the reputation of the entire industry.
3. Mutual slander among the same industries, especially some mature processing and production technologies, still exists technical confidentiality and lack of communication, which makes it difficult for most enterprises to get out of the misunderstanding of duplicate production of low-grade products.
4. There is little communication between manufacturers of flame-retardant bellows and manufacturers of flame-retardant bellows, which makes the flame-retardant bellows fail to match the quality of products required by the process. Especially for high-speed mixers, twin-screw machines are mostly general-purpose. Manufacturers of flame-retardant bellows seldom provide complete advanced technology to meet the needs of filling and modifying masterbatch enterprises.
5. Flame-retardant bellows are monotonous in variety, narrow in application and unsatisfactory in performance. At present, 90% of masterbatch products are mainly used for resin filling. There is still a lot of technology development and market space in flame retardant corrugated control products.
In order to solve the development of flame retardant bellows, we should pay attention to three principles:
1. The principle of practicability is that the flame-retardant bellows must meet the requirements of service performance. For example, when flame-retardant bellows are used in harsh environment, the anti-ultraviolet, anti-bacterial, anti-high and low temperature and anti-stress cracking properties of flame-retardant bellows must be considered; when flame-retardant bellows are used as electrical materials, the insulation, anti-static and flame-retardant properties of materials must be considered; when materials are used as building decorative materials, materials should be required. Beautiful appearance, sound insulation, heat preservation and flame retardancy are good. When using flame retardant bellows as structural materials, the mechanical properties of materials must be considered to meet the requirements. The loads on structural materials can be divided into static and dynamic loads. When the flame retardant bellows are subjected to static loads, the mass acceleration and the corresponding inertia force of the material structure can be neglected. The strength and stiffness of the material should be considered in order to endow the material with the ability to resist damage and deformation. The so-called dynamic load means that the material structure produces mass acceleration, which results in the load of inertial force. Dynamic load can be divided into instantaneous load, impact load and alternating load. In addition to considering the strength and stiffness of materials under impact loads, it is also necessary to consider the possible structural delamination caused by impact loads, which is very important for polymer composites and polymer blends. The structural fatigue problem of materials will become prominent under alternating loads. The fatigue strength and fatigue life of materials must be considered.
2. The economic principle is to reduce the cost as much as possible when the performance of flame retardant bellows is satisfied. The main cost-related factors are: raw material price and material utilization rate related to material selection. The product quality, service life and maintainability related to the performance of flame retardant bellows are also discussed. Product shape and dimension, number of parts, number of non-standard parts and tolerance requirements related to product design. Production cost control related to products.
3. Relevance principle. The relationship between the design of flame retardant corrugated products is not isolated. It's closely related. For example, the preparation method of flame retardant bellows plastic products and the design of corresponding technological conditions depend on the formulation design of products and the total appearance and structure of products; conversely, whether the design of the latter can be realized or not will be greatly affected by the former.
