First, the aging of silicone products and the development trend of SIL
Silicone products anti-aging ability is very good in itself. Good anti-aging ability is more or less affected by long-term use and the influence of external factors.
1/ aging factor
A, internal factors: the main types of rubber, molding method, the degree of bonding, with the types of drugs, processing projects in the factors, etc..
B, external factors: the main ozone, oxygen, oxides, heat, light, radiation, mechanical fatigue, the lack of processing process, etc..
2/ development trend
Silicone rubber is a rubber elastomer with a certain strength and elongation. Silicone rubber as a kind of high performance medical polymer materials, whether in the rubber industry or in the field of medicine are subject to more and more attention of relevant personnel. As a medical silicone rubber material, non-toxic, tasteless, non carcinogenic and a series of excellent properties, in addition, it also has the advantages of stable performance, high temperature resistance, oxidation resistance, high hydrophobicity, softness, permeability, aging characteristics and high transparency, human tissue and blood adhesion, biocompatibility good. Therefore, medical silicone rubber products are increasingly used in the Department of cerebral surgery, Department of ENT, Department of thoracic surgery, abdominal surgery, internal medicine, Urology, Department of orthopedics and plastic surgery and other fields, such as artificial skull, artificial nose, stomach tube, artificial joints, artificial skin and soft tissue expander etc..
The recovery of two, O-ring and other products using silica gel and pyrolysis method
Silicone rubber has many excellent properties, but the price is generally NBR than NBR, EPDM and EPDM three higher. And now the whole world is in advocate of environmental protection and energy saving, waste to treasure. Based on this, we have sufficient reason to SIL silicone O-ring and other products for recycling, to save raw materials, reduce production costs. So silica products are in what areas have a wide range of applications? Medicine and food industry: nose, prosthetic ears, artificial limbs, artificial breast, blood transfusion tube, artificial heart, artificial lung, artificial joint, pressure cooker, water dispenser; electronic industry: instrument touch buttons, heating plate; automotive industry: sealing windscreen, doors and windows and body, heating and radiator with nozzles the spark plug, the protective cover; the construction industry: glass materials of RTV silicone rubber adhesive material, cement and filled with seal; aviation industry: waterproof cover, oxygen mask seal switch etc..
Silicone rubber regeneration process includes: selection, cutting, splitting, refining and blending. Before treatment, the waste plastic should be cleaned to remove the waste and impurities, and then to select and classify, cut into small pieces, and sent to the cracking. Many methods of rubber O ring cracking, mechanical rolling cracked, direct steam pyrolysis, pyrolysis and chemical heat cracking.
Three, O type circle can be applied to what extent
1/ is suitable for basically all the industrial need to seal the places, such as cars, ships, motors, machine tools, machinery, aerospace, electronic and electrical appliances, bathroom, medical machinery, food machinery, mining machinery, agricultural machinery, precision instruments etc..
2/ in different liquid and gas medium, installed in a variety of mechanical equipment, is divided into static and dynamic sealing effect.
In addition to 3/ O-ring we all know, is the most widely used sealing elements in hydraulic and pneumatic transmission system, there is a role that is the damping effect is more and more widely used. Applicable to all kinds of wear resistance, oil resistance, high temperature and high pressure resistance, chemical corrosion resistance, resistance to acid and alkali sites.
4/ rubber O-ring is usually installed on rectangular groove sealing circle in the outer circle or within (note that the design time gap is not too big). Usually used for static sealing and reciprocating seal, of course, can also be used for rotary motion seal, but limited to low-speed rotary seal