Seal ring and puncture cannula with same
A sealing ring and sleeve seat technology, applied in the field of medical devices, can solve the problems of turning out the elastic sealing cap, wearing the elastic sealing cap, affecting the use of the trocar, and achieving the effects of enhancing elasticity, prolonging service life, preventing wear and even rupture
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[0031] like Figure 1-5 Said, the sealing ring of the present invention includes a soft rubber cone ring 1, the center of the soft rubber cone ring 1 is provided with a through hole 2, and the soft rubber cone ring 1 is preferably made of a thermoplastic elastomer material In this embodiment, the soft rubber conical ring 1 is made of styrene-based thermoplastic elastomer. In other embodiments, it can also be made of thermoplastic polyurethane elastomer. The styrene-based thermoplastic elastomer and thermoplastic polyurethane elastic The entities are well known to those skilled in the art and will not be described in detail here. The sealing ring also has several hard films 3 for covering the inner wall 14 of the soft rubber conical ring, and the lower end 15 of the through hole exceeds the lower end of the hard film 3 . The hard film 3 can be a shape suitable for covering the inner wall 14 of the soft rubber conical ring, such as a triangle or a sector, and its size can be di...
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