HOW PTFE ON MEDICAL TUBE
HOW PTFE ON MEDICAL TUBE, (PTFE) in medical tube and pharmaceutical applications
Expanded PTFE Tube material is purely inert, has very strong biological adaptability, will not cause rejection of the body, no physiological side effects on the human body, can be sterilized by any method, and has a multi-microporous structure, can manufacture oxygen sensors.
Using the characteristics of fluoroplastic that the polar charge deviation phenomenon occurs under high temperature and pressure, it can manufacture microphones, speakers, parts on robots, etc.
Utilizing its low refractive index properties, optical fibers can be manufactured.
This can be used for a variety of rehabilitation solutions, including artificial blood vessels and patches for soft tissue regeneration and surgical sutures for vascular, cardiac, general, and plastic surgery.
Applications of polytetrafluoroethylene (PTFE) for anti-adhesive properties PTFE materials have the lowest surface tension of any solid material and do not adhere to any substance, as well as excellent resistance to high and low temperatures, making them very versatile for applications such as anti-adhesive in the manufacture of non-stick pans.
The anti-adhesive process consists of two main types: mounting PTFE parts or sheets on the substrate, and heat shrinking PTFE coating or lacquered cloth laminated with glass onto the substrate. With the continuous development of material application technology, PTFE material’s three major shortcomings: cold flow, difficult to weld, difficult to melt processability is gradually being overcome, so that it is in the optical, electronic, medical, petrochemical oil transfer anti-seepage, and many other fields of application prospects broader.
HOW PTFE ON MEDICAL TUBE? Storage and transportation method Polytetrafluoroethylene is stable, but attention should be paid to eliminate high temperature, especially to avoid contact with open fire, because it will decompose toxic gas above 400℃. Polytetrafluoroethylene can be used at 260 ℃ for a long time.
Because the high-temperature cracking also produces highly toxic by-products such as fluorophosgene and perfluorinated isobutene, so we should pay special attention to safety protection and prevent PTFE from contact with open flame.
Surface treatment and bonding 1. PTFE surface treatment PTFE is difficult to stick, mainly for the following reasons First, the surface energy is low, the critical surface tension is generally only 31 ~ 34 dynes/cm. Due to the low surface energy, the contact angle is large, the adhesive can not fully wet PTFE, thus can not be well adhered to the PTFE.
Crystallinity, chemical stability, PTFE swelling, and dissolution are more difficult than non-crystalline polymers, when the adhesive coated on the PTFE surface, it is difficult to polymer the molecular chain into a chain domain diffusion and entanglement. PTFE structure is highly symmetric but also belongs to the non-polar polymer. The adsorption of adhesive on the PTFE surface is caused by van der Waals forces (intermolecular forces), which include orientation forces, induction forces, and dispersion forces. For the surface of non-polar polymer materials, there is no condition to form orientation force and induction force, but only a weak dispersion force, because it can not form a strong adhesion force