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With the deepening of the global green strategy, people realize that “from nature to nature†is the best way for people and nature to live together in harmony, and it is also an inevitable way to realize the sustainable development of materials. The use of flame retardant as a necessary aid for the safe use of polymer materials is no exception. Therefore, the development of bio-derived flame retardants has also become the focus of attention. However, natural raw materials often have many disadvantages, such as poor heat resistance and low flame-retardant efficiency, which hinders their use as excellent flame retardants. Therefore, it is necessary to carry out a reasonable chemical modification, giving it excellent thermal decomposition properties and overcoming its problems as a flame retardant.
The Fine Phosphorus Chemical Engineering Team of the Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, embeds nucleotide molecules into the structure of melamine-formaldehyde resin to form microspheres with flame-retardant function based on the mechanism of action of the intumescent flame retardant; The active group itself is shielded, the heat resistance is improved, and a good flame retardant effect is obtained in the intumescent flame retardant polypropylene (PP). Adding only 1 wt% microspheres can reduce the amount of flame retardant by more than 30%. . However, because phosphoric acid is directly linked to five carbon sugars, it is very easy to catalyze carbonization during processing, which causes discoloration of the samples. Therefore, the nucleotides are salted to further regulate their thermal decomposition behavior, making them stable in the processing process. Flame retardant effect at high temperatures. This work helps to promote the development of bio-based flame retardant preparation and application technology. Related research results were published in Journal of Analytical and Applied Pyrolysis (2016, 121:394-402), ACS Sustainable Chemistry & Engineering (2017, 5, 2375-2383); 3 patents were applied (CN 2015109808051, CN201611014774.5, CN201611262420. 2). This study was funded by the Ningbo Science and Technology Innovation Team Project.
Shaft sleeves are applied in order to protect the shaft respectively the running surface of the shaft seal from damage or abrasive wear.
Shaft sleeves or tube fittings we made are mostly sold to North America, Europe, Japan, etc.
OD Dimensions from 1" to 16"
Precision: +/- 0.0005"
Material: carbon steel, grey iron, ductile iron, aluminum, stainless steel
Surface treatment: blackening, zinc plating, powder coating, painting, oiled, etc.
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