Polyurethane TPU flexible tubing Features

Thermoplastic polyurethane elastomer Polyurethane TPU flexible tubing (TPU) hose between rubber and plastic, has many excellent characteristics.

1, excellent wear resistance: its Taber abrasion value of 0.35-0.5mg, is the smallest among plastics. The addition of lubricant can reduce the abrasion, thus further improving the degree of wear resistance.

2, tensile strength and elongation: the tensile strength of TPU flexible tubing is 2-3 times that of natural rubber and synthetic rubber, polyester-type TPU tensile strength > 60Mpa, elongation 410%, polyurethane TPU tensile strength of 50Mpa, elongation 550%.

3, oil resistance: TPU oil resistance performance is superior to nitrile rubber, with excellent oil resistance life.

4, low temperature resistance, weather resistance, ozone resistance, TPU weather aging performance is better than natural rubber and other synthetic rubber, its ozone resistance, radiation resistance characteristics in the aerospace industry has special uses.

5, food and medical health: flexible tubing has biocompatibility and anti-coagulant properties, medical TPU is increasingly widely used. Such as blood vessels, ureter, infusion tubes. TPU does not contain enhancers, non-toxic and tasteless, widely used in the food industry.

6, hardness range: TPU hardness 10A-80D, in 15A below all have similar compression deformation characteristics. In the hardness of 85A or more still maintain elasticity, which is no other elastomer characteristics, so TPU has a high load support capacity and good suction and discharge effect;.

7, TPU hose is generally divided into polyester type TPU, polyether type TPU and poly several, polycaprolactone type TPU hose.

Polyester type flexible tubing performance characteristics.

Polyester type flexible tubing hose: has a high mechanical temperature, good wear resistance, oil resistance, fuel and solvent resistance, high temperature performance and excellent UV resistance and hydrolysis stability. Applications with the requirements listed above, the use of polyester-type TPU series hose is recommended.

Polyether type TPU hose performance characteristics.

Applications with low-temperature flexibility, good weather resistance, hydrolysis resistance and resistance to bacterial growth requirements, the use of polyether-type TPU series hose is recommended.

Polycaprolactone type flexible tubing hose performance characteristics.

Polycaprolactone type TPU hose: that has the mechanical strength and high temperature performance of polyester type TPU, but also has the hydrolysis resistance and low temperature resistance of polyether type TPU, good resilience, suitable for special industry applications.

Ptfe tubing flexible Features 


1, high chemical stability: can withstand all strong acids, including aqua regia, hydrofluoric acid, concentrated hydrochloric acid, nitric acid, fuming sulfuric acid, organic acids, etc., strong bases, strong oxidizing agents, reducing agents and a variety of organic solvents. ptfe tubing flexible is very suitable for high-purity chemical feeding material use. 

2, low coefficient of friction: coefficient of friction is generally only 0.04, is a very excellent self-lubricating material, and the coefficient of friction does not change with the change of temperature. 

3, excellent anti-adhesive, ptfe tubing flexible inner wall is not easy to adhere to colloid and chemicals. 

4、Excellent aging resistance, can be used in outdoor for a long time

5 excellent electrical insulation properties: PTFE is a highly non-polar material, with good dielectric properties, great resistance, dielectric constant of about 2.0, in all electrical insulation materials is the smallest.

 6, part of the tube transparency, can be easily observed through ptfe tubing flexible internal fluid conditions

PTFE liner in medical applications

Application of PTFE liner in ventral hernia repair case

Ventral hernia is the most common general surgery disease, and most of them are inguinal hernia, and surgical treatment is the accepted cure.

In 2021, a total of 859 tension-free hernia repairs were performed in our department, 767 cases (89.3%) in men and 92 cases (10.7%) in women. Among them, 731 cases (85.0%) were inguinal hernia, 86 cases (10.0%) were inguinal hernia, 13 cases (1.5%) were femoral hernia, 12 cases were incisional hernia, 9 cases were ventral white line hernia, and 8 cases were umbilical hernia. There were 27 cases of incarcerated hernia (no intestinal necrosis occurred), accounting for 3.1%.

All cases were treated with expanded polytetrafluoroethylene ptfe lined tubes manufactured by CHINA AOKERAY . The inguinal hernia procedure was performed according to the standard Lichtenstein procedure. For incisional hernia, white line hernia and umbilical hernia, the patch was placed in the peritoneum and in front of the posterior sheath, under the anterior sheath or under the skin according to the intraoperative situation after freeing and high ligation of the hernia sac, and all of them could heal in one stage. In femoral hernia, a transinguinal approach is used, after incising the tendon membrane of the external oblique muscle, the round ligament of the uterus, the internal oblique muscle and the joint tendon are drawn upward and outward to reveal the posterior wall, the hernia sac is found at the femoral ring and freed, the sac is incised and the contents are examined and returned to the abdominal cavity, the distal redundant sac is excised, the proximal end is tightly sutured and then turned inward, the transverse abdominal fascia is sutured, and then the patch is placed in the posterior wall, laid flat and sutured to the joint tendon, the pubic commissure ligament and the inguinal ligament. The patch was then placed in the posterior wall, sutured to the joint tendon, pubic comb ligament and inguinal ligament, and finally sutured to the outer layer of tissue and skin. The outer layer of tissue and skin were closed with 2-0 PROLENE sutures.   The average operating time was 95 min, and the longest hospital stay was 16 d, the shortest was 3 d, and the average was 4.6 d. The average follow-up period was 10-60 months, and the average was 30 months. 44 patients had postoperative complications, including 8 cases of urinary retention, 10 cases of postoperative hematoma or plasmacytoma, 4 cases of fat liquefaction in the wound, and 4 cases of incisional sinus tract (3 of which were partially removed and 1 of which was completely removed, all of which were related to There were 15 cases of scrotal swelling, 3 cases of mild postoperative pain, and no recurrent cases.

Tension-free hernia repair was first proposed by Lichtenstein in 1989 in the American Journal of Surgery and was regarded as a “milestone” in hernia repair in the 20th century. It is the best surgical approach for tension-free hernia repair today because it is a tension-free suture repair that maximizes the restoration of normal anatomical and physiological function of the patient’s organs and eliminates the anatomical basis for hernia recurrence, requiring only minimal suturing during surgery [1]. Polytetrafluoroethylene PTFE is completely fluorinated and specially treated expanded PTFE fibers can exhibit a porous structure that can be made into a soft, bendable, non-abrasive material. The greatest advantage of expanded PTFE liner is that it is flexible, the forces in all directions are in balance, it can be cut and covered as needed, presenting fiber continuity with a unique porous permeable microstructure into which cells can infiltrate, good histocompatibility, more superior mechanical properties, light postoperative wound pain for patients, small scar formation, better comfort, and is a tension-free hernia repair Ideal material

Who are the Microcatheter Market and Manufacturers in China?

The coronary microcatheters available in China can be divided into first-line working microcatheters with flat tip design, dilating/penetrating microcatheters with tapered tip design, dual-lumen microcatheters, and other innovative microcatheters.

First-line working microcatheters are the preferred clinical microcatheters, accounting for approximately 80% of the total microcatheter volume. The most classic first-line working microcatheter is the Finecross MG microcatheter from Terumo, Japan, which has a typical three-layer body design with a flat tip and is the most widely used first-line working microcatheter with the best overall clinical performance in China. It is difficult to pass through occluded lesions. As a result, the latest Finecross GT microcatheter, which is available in Japan, has a bluntly tapered tip, and there are no plans to market the Finecross GT microcatheter in China. In addition, APT launched its first domestic first-line working microcatheter, the Instantpass 1.9F microcatheter, in 2017, followed by companies such as Corech, Contrast, Boston Scientific, and Yeju, which have also launched their own first-line working microcatheters.

The other type of dilatation/through microcatheter with tapered tip design, represented by Tornus (now less commonly used) and Corsair from Asahi, Japan, has a pronounced taper at the tip, which greatly ensures the passage performance of the head end of the microcatheter, coupled with a coil spring reinforced body, and with rotational operation, the passage and maneuverability of the microcatheter are maximized. The Corsair Pro, an upgraded version of the Corsair, has now been licensed for entry into the Chinese market. The Corsair Pro significantly improves the tracking performance of the head end of the microcatheter by removing the metal markings on the head end. The main domestic dilatation/penetration microcatheter is APT’s Instantpass 2.6F microcatheter.

In addition, competition in the coronary microcatheter industry has intensified with the introduction of several innovative designs of microcatheters. Vascular Solutions, Inc. launched the Turnpike series of microcatheters in China in March 2021, which includes four different types of microcatheters: Turnpike, Turnpike LP, Turnpike spiral, and Turnpike gold. In the United States, the most commonly used microcatheters for the forward PCI route are Turnpike Spiral (18%) and Turnpike (16%); the most commonly used microcatheters for the reverse PCI route are Corsair/Corsair Pro (29%), Turnpike LP (26%), and Caravel (22%) [3]. Domestic Epter Med has also introduced the Instantpass 1.7F microcatheter, a reverse CTO tool with an outside diameter of only 1.7F and an effective length of 150/170 cm, which greatly meets the needs of reverse CTO procedures. In addition, Asahi’s Caravel microcatheter, which is known for its “thin stem and large lumen”, will soon be available in the Chinese market.

Dual-lumen microcatheters are currently in the early stages of discovery, with overall usage at about 1% of the total annual PCI volume. There are three brands of dual-lumen microcatheters currently available in China: Kaneka’s KDLC from Japan, Asahi’s Sasuke, and CoreTech’s Zhishuang from China. In addition, APT’s dual-lumen microcatheter is in the process of registration

APT’s Instantpass microcatheter usd ETCHED PTFE TUBING AND FEP SHRINK TUBING FROM Aokeray making。

The advantages of using AOKERAY etched ptfe tubes and PTFE thin-walled tubes, fep heat-shrinkable tubes are: etched ptfe tubes and PTFE thin-walled tubes, fep heat-shrinkable tubes competitive prices, guaranteed after-sales service and fast delivery. If you interest its ,pls tell me your exact inquire and free sample .

How did microcatheter technology evolve?

The second phase Microcatheter (1980s to early 21st century) was the emergence of early interventional microcatheters, with the development of the Magic microcatheter and Tracker microcatheter in France and the United States since the 1980s, which had a progressively thinner front end and could be bent at will, and the advent of digital subtraction X-ray machines, which made microcatheter technology move even further forward .

Microcatheter technology can be roughly divided into three stages. The first stage Microcatheter is the infancy of microcatheter endovascular technology, which was first pioneered by Professor Djindjian in France in the late 1960s and early 1970s with super-selective angiography of the external carotid artery and selective spinal angiography.

The third phase Microcatheter (after 2005) was the booming period of coronary microcatheterization, where the flexibility of guidewires, the application and enhancement of microcatheters, and the development of surgical strategies became the new direction of CTO-PCI. In 2005, Prof. Ge Junbo made a preliminary attempt to reverse intervention for CTO in a TCT broadcast. The case was a CTO lesion at the LM bifurcation with good collateral circulation from the RCA to the left crown. The guidewire was unable to pass through the lesion during the forward intervention. Finally, the Runthrough guidewire was reverse fed from the RCA to the LCX, followed by the successful completion of the antegrade guidewire and reverse guidewire Kissing wire. data from a study presented at TCT 2009 showed that the development of reverse technology has greatly improved the success rate of CTO procedures Microcatheter .

micro catheter with Medical Tubing ETCHED PTFE LINER

The micro catheter is a very small diameter reinforced catheter with no strict size definition, but is often empirically referred to as a microcatheter with an outside diameter of 0.70 to 1.30 mm. Microcatheters can be used for guidewire support/exchange, passage of lesions, delivery of embolic agents, stenting, etc.

The microcatheter is composed of a base layer of etched PTFE Liner , a middle layer of stainless steel woven mesh or nickel-titanium spring, and an outer layer of Pebax liner.
The head end of the microcatheter comes with a developer ring for easy positioning and consists of a handle (seat), strain relief sleeve, body, and marker. The body is designed and manufactured to play a key role in the performance of the microcatheter, and typically consists of an inner liner, an intermediate reinforcement layer, an outer polymer layer, and a surface coating.

The liner material is usually a lubricious material (e.g., etched PTFE Liner ) to ensure a smooth lumen; the intermediate reinforcement layer is usually woven or wound with metal wire to increase the strength and pushing force of the catheter. The design of the middle reinforcement layer represents the important properties of the microcatheter for different vascular lesions, e.g.,
The micro catheter the braid + wrap design allows for good proximal braid pushability and good distal wrap flexibility, which is a very good choice for neurovascular delivery, while for CTO lesions, the high stiffness of the braid can help them traverse calcification. In addition, the distal surface of the tubing is usually coated with a certain length of coating material (usually hydrophilic) to enhance the passage of the microcatheter through the vessels and lesions.

Explanation of main test indicators of PTFE products

Explanation of main test indicators of PTFE products .PTFE products are a special type of plastic that differs greatly from other plastics. According to the industry standard of the Ministry of Light Industry, the PTFE products produced must meet the requirements of the index. Below we list the definitions of the 13 main test indicators for PTFE products for reference. Read more

Teflon PFA tube performance advantage

Teflon PFA tubes , PFA hoses have excellent chemical stability, mechanical properties, electrical insulation, self-lubricating properties, non-stick properties, non-flammability and aging resistance. Its outstanding feature is that the melt viscosity is much lower than that of PTFE, so it can be processed by ordinary thermoplastic forming methods. Its products have good high temperature stability, high temperature mechanical strength is about 2 times that of PTFE, PFA film is softer than PTFE, and has good bending and crack resistance. Read more

The difference between PTFE, PFA, FEP, ETFE

The difference between PTFE, PFA, FEP, ETFE
PTFE polytetrafluoroethylene

Teflon FEP: FEP

Teflon PFA

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How select PTFE tube and FEP tube ?

How select PTFE tube and FEP tube  ptfe tubing suppliers ? Which one to choose for PTFE and FEP depends on the user’s needs. The commonly used color of PTFE is opalescent, followed by translucent and colored, and no transparency has been invented yet. While FEP replaces the drawbacks of PTFE, the commonly used color of FEP is transparent. Read more