Liquid Silicone Rubber Material
Musensil LSR Raw Material in China and Its Role in the Plastics Industry
Musensil LSR Raw Material in China and Its Role in the Plastics Industry
In the plastics industry, musensil lsr raw material in china plays a vital role as an injection molding material for technical components such as valves and diaphragms.musensil lsr raw material in china These products are typically used in harsh environments where chemical and heat resistance is a necessity. LSR’s ability to withstand sterilization processes also makes it ideal for medical applications and baby care products such as bottle tips, soothers and seals.
Like thermoplastics, liquid silicone rubber is available in a wide range of viscosities and performance characteristics that vary by type and grade. The liquid-to-solid state of this material is easily moldable into a complex, precision-formed shape by the injection molding process.
Unlike thermoplastics, which must be "packed" into the mold to ensure that the entire part will be molded to its final dimensions, the crosslinking and curing process of LSR is self-limiting. As a result, silicone molding utilizes a hold pressure to achieve the desired final dimensions without any shrinkage. The use of a high quality injection machine, pumping unit and mold is critical in the successful production of a solid, defect-free part.
LSR’s low viscosity in a hot mold allows it to quickly and efficiently flow into and around the intricate details of the product, resulting in a fast cycle time. Typical cycles for silicone parts are 10-30 seconds, depending on the geometry and specific vulcanization characteristics of the material. Rapid cycle times allow processors to meet short lead-time demands and keep their manufacturing costs under control.
The ability to bond LSR to a variety of thermoplastics eliminates the need for a priming step, which can cut product cost by eliminating the material, labor and energy required to apply an adhesive to the surface of the part before overmolding with the functional LSR. Moreover, it allows the LSR to be precisely placed in areas of the product that require functional functionality, and portions of the thermoplastic substrate that are not overmolded with the silicone no longer need to be thickened to withstand the LSR’s high curing temperatures.
Depending on the application, some LSR’s can be cured at room temperature while others are formulated to cure in an oven at high temperatures. In either case, proper cleaning is essential to maintain the optimum condition of the injection molding equipment and work area. This includes ensuring that the injection mold is clean and free of organic rubbers or other polymers that can poison the catalyst and interfere with the cured reaction. In addition, all metering and mixing equipment must be thoroughly cleaned. Any organic or inorganic contamination may inhibit the cured reactions and result in defects in the finished part. To avoid this, most molding houses employ a variety of automation options for the removal and transportation of molded parts from the injection-molding machines to value-added secondary operations such as slitting, printing, marking, and assembly. This reduces handling, minimizes the risk of injury to workers, and improves productivity.
0users like this.
