Butyl reclaimed rubber retains the basic performance characteristics of butyl rubber, and has excellent sound insulation and shock absorption properties. It can completely or partially replace butyl original rubber in the production process of various butyl rubber products, significantly reducing raw material costs. The sound insulation board processed with butyl rubber as the main raw material has good sound insulation effect, is easy to install, and is widely popular in the market. Mixing butyl reclaimed rubber into the butyl rubber soundproofing board can further improve the cost performance of soundproofing materials, and the quality and amount of butyl reclaimed rubber directly affect the performance of the soundproofing board.
1. Selection tips for butyl reclaimed rubber
The use of butyl reclaimed rubber to reduce the cost of raw materials for sound insulation board, the quality of butyl reclaimed rubber is the basis to ensure the quality of the finished sound insulation board. When choosing butyl reclaimed rubber for sound insulation board, rubber product manufacturers need to choose the appropriate butyl reclaimed rubber according to the actual needs. In particular, it is necessary to avoid the use of reclaimed rubber of asphalt or aromatic oil, to avoid harmful substances in the reclaimed rubber affecting human health; Provide relevant testing standards for environmentally friendly butyl reclaimed rubber, odorless butyl reclaimed rubber, select the reclaimed rubber product (mainly including tensile strength, elongation at break, hardness, etc.) that is closest to the sound insulation board index, and choose a regular reclaimed rubber plant Cooperation to ensure the quality and quality stability of butyl soundproof rubber sheet.
2. Usage and dosage of butyl reclaimed rubber in soundproof rubber sheet
When using butyl reclaimed rubber to reduce the production cost of sound insulation board, rubber product manufacturers mostly choose to mix butyl reclaimed rubber with butyl raw rubber, which can not only ensure the quality but also effectively reduce the cost of raw materials. When using butyl reclaimed rubber in sound insulation boards, rubber product manufacturers need to determine the amount of reclaimed rubber according to the specific indicators of sound insulation board 2LLYY64 and the reclaimed rubber index. For sound insulation boards that do not require high physical strength and other physical indicators, they can even use fully recycled gum.
3. Formulation design of butyl recycled rubber/rubber sound insulation board
When butyl reclaimed rubber and butyl rubber are used together to produce rubber sound insulation boards, rubber product manufacturers can further optimize sound insulation board performance indicators by adjusting the sound insulation board formula. In general, use sulfur vulcanized butyl rubber/reclaimed rubber, the mechanical properties of vulcanized rubber are better; for soundproofing board formulations with higher hardness requirements, the amount of high wear-resistant carbon black and fine particle thermal cracking carbon black can be increased appropriately; The use of short fibers can further improve the fixed tensile stress, hardness, and tear resistance of the soundproof rubber sheet. At this time, it is necessary to pay attention to the change in the elongation and wear resistance of the soundproof board.
The soundproof rubber sheet produced by using butyl reclaimed rubber and butyl rubber in combination can not only block sound transmission, but also absorb shock and reduce vibration, which is inseparable from the internal resistance of butyl rubber molecular chain. If the rubber product manufacturer needs to further improve the sound insulation effect of butyl sound insulation rubber sheet, the use of asbestos in the formula is also a good choice. Regarding other mixing techniques of butyl reclaimed rubber in the sound insulation board, I will discuss with you later.