37 results about "Silastic" patented technology

A lubrication system is disclosed which minimizes friction and that is useful for application on the surface of a flexible portion of a medical device. Such a lubrication system includes a lubricant that is able to move when the flexible portion of the medical device flexes and is biocompatible and is not degraded by the application of alcohol or other conventional medical sterilizing and cleaning agents. The lubricant is bonded to the surface of the flexible portion of the medical device. The lubrication system may be used on an elastomeric septum, such as a silicone rubber elastomer. The lubricant coating may be any type of coating that can be chemically bonded to the elastomer, such as di-paraxylene, poly-(p-xylene), polytetrafluoroethylene, or polyvinylpyrrolidone.

The invention discloses a preparation method of hydrophobic coating on the surface of silicon rubber. The method comprises the following steps: tetraethyl orthosilicate is taken as a precursor, anhydrous alcohol is taken as a solvent so as to prepare silicon dioxide sol under the condition of alkaline catalysis, and the obtained silicon dioxide sol is added with a silane coupling agent for modification process; after the surface is cleaned, a silicone rubber insulator is dipped in the modified silicon dioxide sol to carry out film coating with a pulling method so as to form a one-time coating and obtain a micro-nanometer rough structure which is similar to the leaf of taro; and after dried, the nanometer rough structure is again dripped in self-made fluorosilane sol for a secondary film coating with the pulling method, and then placed in an oven for thermal processing under 100 DEG C to 120 DEG C. The one-time coated micro-nanometer rough structure can obtain the transparent hydrophobic coating with acid and alkali resistance, after being modified by the secondary coating with low-surface fluorosilane sol.

A hemodialysis and vascular access system comprises a subcutaneous composite PTFE silastic arteriovenous fistula having an indwelling silastic venous end which is inserted percutaneously into a vein and a PTFE arterial end which is anastomosed to an artery. Access to a blood stream within the system is gained by direct puncture of needle(s) into a needle receiving site having a tubular passage within a metal or plastic frame and a silicone upper surface through which needle(s) are inserted. In an alternate embodiment of the invention, percutaneous access to a blood stream may be gained by placing needles directly into the system (i.e. into the PTFE arterial end). The invention also proposes an additional embodiment having an arterialized indwelling venous catheter where blood flows from an artery through a tube and a port into an arterial reservoir and is returned to a vein via a port and a venous outlet tube distinct and distant from the area where the blood from the artery enters the arterial reservoir. The site where blood is returned to the vein is not directly fixed to the venous wall but is free floating within the vein. This system provides a hemodialysis and venous access graft which has superior longevity and performance, is easier to implant and is much more user friendly.

A flexible elastomer closure plug mat presents a plurality of protruding hollow septa closure plugs depending from the mat's lower face. The mat and protruding closure plugs are preferably formed of silicone rubber, with a thick layer of polytetrafluoroethylene or TEFLON® durably bonded to the lower face of the mat and to the outer faces of all of the arrayed plurality of closure plugs. The arrayed plurality of closure plugs are dimensioned for telescoping insertion into the open tops of a corresponding plurality of sample vials held in a well plate, and for frictional engagement therein.

Provided is a bronchoscopy training model for training in a technique for puncturing a lymph node adjacent to trachea / bronchi from the inside of the trachea / bronchi with an ultrasonic bronchoscope. Specifically, provided is a training model for training in ultrasound-guided needle puncture of a lymph node in a vicinity of trachea / bronchi, the training model including a jaw model, a bronchus model, and a replaceable needle puncture site, in which: the needle puncture site includes a simulated tracheal / bronchial cartilage, a simulated lymph node, and a simulated surrounding tissue; the simulated tracheal / bronchial cartilage, the simulated lymph node, and the simulated surrounding tissue in the needle puncture site each include as a main component any one of a silicone rubber and a urethane resin, and at least the simulated tracheal / bronchial cartilage and the simulated surrounding tissue in the needle puncture site each further include an organic powder filler blended therein; and the simulated tracheal / bronchial cartilage in the needle puncture site is provided on a tracheal / bronchial inner wall surface of the needle puncture site.

A biologic feedback type artificial sphincter ani system is composed of an artificial sphincter ani consisting of silica gel pad, pressed bag, clamped bag, pressed catheter and clamped catheter, and an artificial sphincter ani controller consisting of pressure sensor and its regulator, miniature liquid pump and its driver, single-chip microprocessor, LCD, buzzer, push button, battery and PCB.

A rotary centrifuge seal consisting of a silicone rubber ring-shaped diaphragm secured to a phenolic ring member is manufactured by inserting the preformed phenolic compound element into a mold cavity of an injection compression mold with precise fit. The phenolic element is then covered with an overmold cavity and silicone rubber is injected into the overmold cavity by runnerless injection techniques in contact with exposed bonding surfaces of the phenolic compound element and the silicone rubber molding components and the phenolic compound element are compressed together to form a strong molecular bond with the application of heat and without the required use of primers, adhesives, bonding agents or mechanical bonding. The phenolic compound element is shaped in the form of a ring having external and internal peripheral surfaces whereby the exposed bonding surfaces include these internal and external peripheral surfaces to provide a more secure bond.

The invention aims at the defects of the total coloring of silicone rubber electric wires and cables and provides a silicone rubber coloring master batch and a preparation method thereof. The silicone rubber coloring master batch comprises the following components according to parts by weight: 100 parts of silicone rubber, 15 parts to 60 parts of active fillers, 1 part to 5 parts of structure control agents and 120 parts to 160 parts of pigments; and the preparation method comprises the steps of batching, mixing and cooling. The master batch is used for replacing pigments to color the wires and cables, which can bring convenience to the production enterprises of silicone rubber electric wires and cables to process the wires and cables of various color, require no total coloring, solve theproblem that color changing is difficult when the wires and cables are produced, shorten production period and quicken production fund turnover, thereby increasing economic benefit, reducing workloadof workers and greatly reducing pollution.

A composite article is provided which comprises a silicone rubber matrix reinforced with a polyaramid textile. The polyaramid textile is bonded to the silicone rubber by a bonding composition that comprises at least an acryloxy organosilane. The article is manufactured by dipping polyaramid textile into an organosilane dip that comprises an acyrloxy organosilane. The so-dipped polyaramid textile is then bonded to silicone rubber.

The invention discloses a prosthesis for repairing the maxillary defects and the preparation method thereof, which includes a silicone rubber outer layer which is in line with the maxillary defect region, a cylindrical skin soft tissue expander inner layer is arranged in the silicone rubber outer layer, the cylindrical skin soft tissue expander inner layer is connected with an inflation device which extends to the outside of the silicone rubber outer layer, and corresponding magnetic retainers are arranged on the silicone rubber outer layer and the cylindrical skin soft tissue expander inner layer or the inflation device. The invention is the prosthesis which has better repair retention, convenient wear and is used for repairing the maxillary defects, and the invention is further establishes the preparation method of the prosthesis.

The invention provides a self-adhesive PSA (polysulfonamide) / silicone rubber composite nanofiber porous membrane. Nanofibers comprise PSA and silicone rubber, wherein the silicone rubber is used for enabling nanofibers to adhere to one another. The self-adhesive PSA / silicone rubber composite nanofiber porous membrane has outstanding performance of being high in strength, chemical corrosion resistant, high temperature resistant and the like; a preparation method is simple, easy to implement and lower in cost.

The composite elastic soft sealing is double-layered composite sealing structure embedded inside toothed groove of valve seat. There are elastic matter in the bottom of the groove and metal sealing ring on valve clack. The sealing pair between the valve body and the valve crack is metal and rubber, rubber is embedded into groove and fixed with injected silicon rubber, and the metal for sealing isintegrated with or attached to the valve clack. The composite sealing ring has excellent resilience and thus high sealing performance and high sealing pressure. The present invention is suitable for ball valve, butterfly valve, cock valve and other rotating shaft valve.

The invention relates to a PTFE (Polytetrafluoroethylene) packing. The PTFE packing comprises a packing body, a silicone rubber core and an isolating membrane, wherein the packing body is woven by PTFE materials, the isolating membrane wraps the silicone rubber core, and the packing body wraps the isolating membrane so as to form a surface layer of the packing. According to the PTFE packing, the outer layer of the packing is made of the PTFE materials, the inner core of the packing is made of silicone rubber, and the outer layer is isolated from the inner core by the PTFE membrane, so that the PTFE packing has the advantages of good elasticity, good sealing performance and good corrosion resistant performance.

The invention relates to a method for manufacturing a fixing heating roller coated with teflon film silastic, comprising the following steps of: firstly, sheathing a fluorin jacket on the peripheral surface of an aluminium tube, and then infusing a silica gel layer between the aluminium tube and the fluorin jacket. The fluorin jacket is made of tubular teflon films. The invention has the advantages of simpler process, simple equipment, easy operation and low cost; and the manufactured fixing heating roller has high chemical stability and is suitable for high-speed printers and copiers.

The invention provides an external device for treatment of erectile dysfunction or impotence that enables an impotent to get through with normal sexual intercourse. The external device is molded integrally of a silicone rubber having a Shore A hardness of 5±2 as measured according to ASTM-D412.

The invention relates to an electrorheological elastomer, and especially relates to a composite electrorheological elastomer material of starch, transformer oil drop and silicone rubber. An electrorheological fluid composed of starch particles and transformer oil is dispersed in the mixed liquor of 107 silicone rubber and silicone oil. Without / with an electric field, unordered and ordered composite electrorheological elastomers with a dispersed phase structure can be obtained respectively through solidification. Wherein, the transformer oil always presents a liquid phase in the process of silicone rubber solidification. As oil drops of low viscosity always exist inside the composite electrorheological elastomer, so that the polarization influence of the electric field on the starch in the elastomer is increased, and furthermore the change volume of the relative storage modulus of the elastomer is improved. With good electrorheological effects, the composite electrorheological elastomer material of the invention boasts broad application prospects.

The invention discloses a preparation method of a bionic carotid artery blood vessel. The preparation method comprises the following steps: firstly, preparing a resin mode and a resin minor of the bionic carotid artery blood vessel, filling the resin model and the resin minor with liquid-state silica gel, and implementing curing and demoulding so as to obtain a silicon rubber model and a silicon rubber minor of the bionic carotid artery blood vessel; assembling the silicon rubber model, pouring de-ionized water into the assembled silicon rubber model, and implementing ultra-low temperature freezing, so that a bionic carotid artery blood vessel ice model is formed; injecting a biological material water solution into the silicon rubber minor of the bionic carotid artery blood vessel, implementing cross-linking treatment to separate semigel and model minor, so as to obtain a semi-hydrogel formed bionic carotid artery semicircular part; assembling the bionic carotid artery ice model and the semi-hydrogel formed bionic carotid artery semicircular part, pouring the biological material water solution, so that the ice model is unfrozen, and implementing cross-linking on the biological material solution to obtain a hydrogel, so that a hydrogel bionic carotid artery blood vessel is obtained; and pouring a cell suspension into the hydrogel bionic carotid artery blood vessel so as to form a cell layer on the inner surface of the hydrogel bionic carotid artery blood vessel, so that the bionic carotid artery blood vessel is formed. The bionic carotid artery blood vessel provided by the invention is profile-modeling and bionic.

The invention discloses a Silastic prescription and producing technique thereof. The main technical problem is making the Silastic have characteristic of low extensive rate. The prescription of the invention takes the methyl ethylene as the benchmark weight, the white soot carbon having 30-60% weight methyl ethylene; 2-8% hydroxide radical silicon oil; 0.5-2% diethyl dioxyethyl silane; 0.5-3% ethylene triethoxy silane. The producing technique comprising the following steps: conglobating the materials, increasing the temperature to 165-170 centigrade; the vacuum degree 0.04-0.08 MPa; time 1-3 h; then decreasing the temperature to 80 centigrade to obtain the Silastic. The invention uses the ethylene triethoxy silane to change the radical capacity of the physical property of the gross rubber, reducing the extensive rate of the Silastic to satisfy the requirement of the special product and assure the product operating stability and durability compared to the current technology.

The invention belongs to the field of medical packing, and particularly relates to a human body soft tissue filling agent and a preparation method thereof and a specialized pulverizer. The filling agent takes medical solid silicone rubber micropowder or an expanded polytetrafluoroethylene prosthesis as a main material. A using method of the filling agent comprises the step that the filling agent containing the medical solid silicone rubber micropowder or expanded polytetrafluoroethylene micropowder is implanted into a human body in an injecting mode, and then the problems such as sinking of human soft tissues are solved. By means of the human body soft tissue filling agent, the senescence problems such as sagging, sinking and wrinkles, caused by age increasing, of the parts such as the forehead, the temples, the nasolabial grooves, the lacrimal grooves, the nasolabial folds and the submalar triangles, the unbeautiful problem caused by congenital growth deficiency of the nose, the forehead, the temples, the jaw and the like and the tissue sinking problems caused by human body injuries can be well solved. The sunk parts, not easily filled with a traditional medical silicone rubber prosthesis or expanded polytetrafluoroethylene prosthesis, of the forehead, the submalar triangles, the nasolabial folds and the like can be easily filled.

The invention discloses a production process of a ceramic friction plate. The production process comprises the following steps that mineral fibers, aramid fibers and ceramic fibers are mixed inside amixer, and then boron nitride, graphite, brass powder and silicone rubber powder are sequentially added into the mixer for full stirring so as to obtain a mixture A; after the mixture A is heated inside the mixer, the mixer is opened, and then a liquid rubber agent is added into the mixer, so that the mixture A and the liquid rubber agent are stirred for 10 mins in an open state of the mixer to bemixed into a mixture B; and then mixed gas generated by mixing the liquid rubber agent and the mixture A at a high temperature is discharged, the mixture B which is in a liquid state is directly discharged to forming equipment through the mixer, the mixture B in the liquid state is extruded into the friction plate, and standing, cooling and form-stabilizing are carried out on the formed frictionplate by using the forming equipment of cooling equipment. And therefore, the obtained friction plate is high in toughness and good in heat conduction performance, the wear resistance of the frictionplate is effectively improved, and the service life of the friction plate is effectively prolonged.

The present invention is one kind of high-hydroscopicity polypropylene fiber and has the technological feature that into fiber level polypropylene material, modifying master batch in certain amount and comprising polyglycol as modifier and polypropylene powder dimethyl silastic, carrier polypropylene powder, lubricant calcium stearate, stabilizer 330 and degrading agent BTBP through high speed mixing, melting, extruding and pelletizing is added, and through common polypropylene fiber producing process the high-hydroscopicity polypropylene fibe is made. The present invention has the advantages of light weight, high strength, high elasticity, high anticorrosion, and unique humidity conductance and heat insulating performance owing to its core sucking effect.

The invention relates to a PTFE (Polytetrafluoroethylene) packing. The PTFE packing comprises a packing body, a silicone rubber core and an isolating membrane, wherein the packing body is woven by PTFE materials, the isolating membrane wraps the silicone rubber core, and the packing body wraps the isolating membrane so as to form a surface layer of the packing. According to the PTFE packing, the outer layer of the packing is made of the PTFE materials, the inner core of the packing is made of silicone rubber, and the outer layer is isolated from the inner core by the PTFE membrane, so that the PTFE packing has the advantages of good elasticity, good sealing performance and good corrosion resistant performance.

A composite article is provided which comprises a silicone rubber matrix reinforced with a polyaramid textile. The polyaramid textile is bonded to the silicone rubber by a bonding composition that comprises at least an acryloxy organosilane. The article is manufactured by dipping polyaramid textile into an organosilane dip that comprises an acyrloxy organosilane. The so-dipped polyaramid textile is then bonded to silicone rubber.

The invention discloses a far-infrared muscles and bones pain relieving plaster and a preparation method thereof, and relates to the field of medical plasters. The far-infrared muscles and bones painrelieving plaster comprises the following raw materials (by weight): 30-40 parts of a styrene-isoprene-styrene block copolymer, 20-30 parts of silicone rubber, 5-10 parts of natural rubber, 25-35 parts of C5 resin, 2-7 parts of lanolin, 20-30 parts of cashew nut shell oil, 1-3 parts of an antioxidant, 10-20 parts of polyvinylpyrrolidone, 10-20 parts of lithopone, 5-10 parts of a traditional Chinese medicine powder and 3-7 parts of far-infrared ceramic powder. The traditional Chinese medicine powder comprises the following raw materials (by weight): 10-15 parts of Chinese holly, 5-10 parts of cassia twig, 10-15 parts of dahurian angelica root, 8-12 parts of pseudo-ginseng, 5-10 parts of eucommia leaf and 5-10 parts of Corydalis decumbens (Thunb.) Pers. The prepared plaster greatly reduces irritation and anaphylaxis of a traditional rubber plaster, has good initial adhesion and permanent adhesion, is not easy to peel off, will not leave residual adhesive after peeled off, has strong viscosity, and can be used for adjuvant therapy of muscles and bones pains caused by muscles and bones pain, lumbocrural pain, muscle and joint pain, sprain, cervical spondylopathy, hyperosteogeny, numbness of the limbs and the like.

The invention relates a silastic mould casting framework of surfboard fins and belongs to the technical field of surfboard fins processing. The silastic mould casting framework of surfboard fins comprises a base.The base plate is provided with four baffles, and the four baffles are formed in the rectangular shape. Four sliding blocks are arranged on the base plate, and each sliding block is correspondingly located in the front of the outside of the four baffles.Screw rods and two guide pillars are arranged between each baffle and the front of the outside of the sliding blocks.The silastic mould casting framework of surfboard fins solves the problem of the existing silastic mould casting frameworks of the surfboard fins with large quantity, large storage space and inconvenient management. The silastic mould casting framework of surfboard fins also solves the problem that the work efficiency is affected by the tedious disassembly and assembly of the existing silastic mould casting frameworks of the surfboard fins.

The invention aims at the defects of the total coloring of silicone rubber electric wires and cables and provides a silicone rubber coloring master batch and a preparation method thereof. The silicone rubber coloring master batch comprises the following components according to parts by weight: 100 parts of silicone rubber, 15 parts to 60 parts of active fillers, 1 part to 5 parts of structure control agents and 120 parts to 160 parts of pigments; and the preparation method comprises the steps of batching, mixing and cooling. The master batch is used for replacing pigments to color the wires and cables, which can bring convenience to the production enterprises of silicone rubber electric wires and cables to process the wires and cables of various color, require no total coloring, solve the problem that color changing is difficult when the wires and cables are produced, shorten production period and quicken production fund turnover, thereby increasing economic benefit, reducing workload of workers and greatly reducing pollution.

A long-term internal temperature measurement device includes a silastic, tunneled right-atrial catheter having a distal end adapted to be directed into the superior vena cava of a patient to reside within one of the superior vena cava and the right atrium of the patient's heart, an outer end extending outside of the patient and a cuff positionable beneath the skin of the patient for generally preventing bacterial growth up the catheter. A thermistor device is mounted within the catheter, specifically within the distal end of the catheter, the thermistor device operative to measure the temperature of blood flowing through the patient's right atrium or superior vena cava. Finally, an electronic display device is in information transmission connection with the thermistor device and further is operative to display the internal temperature of the patient as measured by the thermistor device within the patient's right atrium or superior vena cava.