In the design and manufacturing of minimally invasive medical devices, the choice of catheter material directly determines the product's performance and clinical safety. Medical PI tubing (polyimide tubing) and medical PTFE tubing (polytetrafluoroethylene tubing) are currently the two most widely used high-performance polymer materials in interventional medicine. Although both possess excellent biocompatibility, they differ significantly in mechanical properties, processing techniques, and specific applications. As a professional supplier of medical-grade tubing, LINSTANT is committed to providing high-performance material solutions for global medical device development. Our business scope covers a comprehensive product line from basic extrusion to complex reinforced structures, including extruded single/multilayer tubing of various sizes, single-lumen/lumen tubing, single/double/triple-layer balloon tubing, coil/braided reinforced sheaths, as well as specialty engineering materials PEEK/PI tubing and various surface treatment solutions. I. Comparison of Core Material Properties To understand the differences between the two, we must first start with their physical and chemical properties: 1. Medical PI Tube (Polyimide) Medical PI tubes are renowned for their extremely high strength and extremely thin wall thickness: High Strength and Hardness: PI material has extremely high tensile strength, providing excellent compressive strength and kink resistance. Extremely Thin Wall Thickness: It can be processed into micro-tubes with a wall thickness of only about 0.01mm, which is crucial for interventional procedures requiring passage through extremely fine blood vessels. High Temperature Resistance and Chemical Stability: It maintains structural stability under various sterilization environments. 2. Medical PTFE Tube (Polytetrafluoroethylene) PTFE is known worldwide for its "slippery" properties, being one of the solid materials with the lowest coefficient of friction: Extremely High Lubricity: The ultra-low friction of the inner surface of Medical PTFE Tube makes it an ideal choice for guide wires and liners in delivery systems. Excellent Flexibility: Compared to medical PI tubes, PTFE is more flexible and easier to bend. Non-stickiness: It adheres to virtually no substances, effectively preventing thrombosis. II. Main Differences Between Medical PTFE Tubes and Medical PI Tubes Physical Strength and Support: Medical PI tubes possess extremely high tensile strength and rigidity, exhibiting metal-like physical properties, providing excellent resistance to kinking and structural support. In contrast, Medical PTFE Tube products are softer and more flexible, but are prone to deformation under pressure. Wall Thickness and Dimensional Accuracy: In interventional medical devices requiring extremely miniaturization, medical PI tubes offer significant advantages. They can be processed into extremely thin tubes with a wall thickness of less than 0.02 mm while maintaining strength. Medical PTFE tubes, due to material limitations, typically have thicker walls, making it difficult to achieve the same level of strength in ultra-thin specifications. Surface Friction and Lubrication: Medical PTFE tubes possess the lowest known coefficient of friction among solid materials, exhibiting natural super-slippery properties, making them ideal as liners for delivery systems. While medical PI tubes have a smooth surface, their friction is relatively high, usually requiring the application of a hydrophilic coating to improve their slipperiness. Bonding and Composite Processing Capabilities: Medical PI tubing has good chemical polarity, making it easy to bond and composite with medical adhesives (such as UV adhesives) or thermoplastic elastomers (such as Pebax); Medical PTFE Tube tubing, on the other hand, has extremely strong non-adhesive properties and usually requires complex sodium curing treatment or LINSTANT's PTFE surface treatment before being composited with other materials. Visual Characteristics and Transparency: Medical PI tubing typically exhibits a characteristic amber, golden yellow, or dark brown color; while medical PTFE tubing usually appears as an opaque milky white or translucent waxy appearance. III. Differences in Clinical Application Scenarios Due to their different properties, these two types of medical catheters play different roles in interventional medical devices: Applications of Medical PI Tubing Due to its excellent electrical insulation properties and rigidity, it is often used as a reinforcing layer for electrophysiological catheters, microcatheters, and as a support cannula in cardiovascular interventional devices. When it is necessary to pass through narrowed lesions, the pushing force provided by medical PI tubing is unmatched by other materials. Applications of Medical PTFE Tubing Primarily used as a catheter liner. In multilayer composite catheters, PTFE, as the innermost layer, ensures smooth passage of guidewires or other instruments through the catheter lumen, reducing operational resistance. IV. How to Choose the Right Catheter Material for Your Needs? During the development process, the choice between medical PI tubing and PTFE tubing depends on your design goals: If your device requires an extremely small outer diameter and a very large inner diameter (i.e., thin-walled), while also demanding extremely strong support, medical PI tubing is the preferred choice. If the core requirement of your device is smooth delivery of internal instruments, then a PTFE liner is indispensable. Composite Solutions: Modern high-end microcatheters typically employ a "combination of inner and outer layers." LINSTANT can provide customized coil/braided reinforced sheaths, perfectly integrating PTFE liners with medical PI tubing or other reinforcing layers. LINSTANT consistently focuses on the cutting-edge needs of minimally invasive medicine, helping medical device manufacturers achieve more precise and safer clinical procedures by providing precision-engineered PEEK/PI tubing and multilayer/multi-lumen tubing.

PEEK tubing (polyether ether ketone tubing) is highly favored in laboratory analysis, medical device manufacturing, and aerospace engineering due to its exceptional performance. This high-performance polymer can withstand high temperatures up to 250°C (and even 260°C for short periods) and possesses excellent chemical stability and mechanical properties. However, due to the hardness and high toughness of PEEK material, achieving precise and smooth cuts presents a challenge for many engineers. Why is the Cutting Quality of PEEK Tubing Important? Whether used in high-performance liquid chromatography (HPLC), precision medical catheters, or military aerospace applications, the cutting quality of PEEK tubing directly impacts its effectiveness: Reduced dead volume: In analytical instruments, uneven cuts can lead to dead volume at the connection points, causing signal peak broadening or experimental errors. Ensured sealing: Vertical and smooth cuts ensure a tight seal between the tubing and connectors, preventing leaks under high-pressure conditions. Maintaining biocompatibility: Professional cutting methods prevent the generation of debris, ensuring the biocompatibility of PEEK tubing in medical applications (such as cardiovascular, spinal surgery, and endoscopy). Common PEEK Tubing Cutting Methods and Professional Equipment 1. Using a Dedicated Tube Cutter (Preferred for Laboratories) Dedicated tube cutters are usually equipped with a V-groove to securely hold the PEEK tubing, ensuring the blade cuts perpendicularly. Operating tips: Apply even pressure during cutting and avoid rotating the tube to prevent spiral patterns on the cut surface. 2. Automated Precision Extrusion and Cutting (Preferred for Industrial Applications) For large-scale production, more advanced facilities are required. LINSTANT has nearly 20,000 square meters of cleanroom space, fully compliant with GMP requirements. We are equipped with 8 dedicated PEEK extrusion production lines, capable of producing tubing with high strength, high fracture toughness, and dimensional stability. With 40 sets of welding and molding equipment, we can achieve precise length control and end-face treatment directly in the production process, ensuring that every inch of PEEK tubing meets stringent standards. 3. Laser Cutting Technology For extremely fine or complex-shaped medical catheters (such as urological catheters and electrosurgical forceps sheaths), laser cutting offers non-contact, ultra-high precision. About LINSTANT: Your High-Performance Tubing Partner When addressing the application challenges of PEEK tubing, choosing a supplier with strong production capabilities is crucial. LINSTANT not only focuses on the cutting process but also maintains strict control at the source of production: Strong Production Scale: We have 15 imported extrusion production lines (covering single-layer, double-layer, and triple-layer co-extrusion capabilities), and 2 injection molding production lines. Full-Chain Support: We have nearly 100 sets of weaving, spring, and coating equipment, enabling us to provide customized solutions for different application scenarios such as electrocoagulation forceps and orthopedic trauma care. Efficient Delivery: Our comprehensive equipment matrix ensures efficient fulfillment capabilities even for complex orders. Precautions During the Cutting Process When handling PEEK tubing, its material characteristics should be fully considered: Avoid using ordinary scissors: Ordinary scissors will compress the tube wall, causing deformation and oval-shaped cuts that severely affect fluid flow. Maintain cleanliness: As PEEK is often used in trauma care and orthopedic surgery, the cutting environment and tools should be kept clean to avoid cross-contamination. Pay attention to dimensional stability: Although PEEK has excellent dimensional stability, extra care is required when cutting extremely thin-walled tubes to prevent collapse. Correctly cutting PEEK tubing is the crucial first step in leveraging its high-temperature resistance, wear resistance, and flame-retardant properties. Whether you need precise cutting of a single tube or are looking for a large-scale customized production partner, LINSTANT can provide professional support that meets GMP standards. Avoid using ordinary scissors for cutting, as this will damage the roundness of the PEEK tube.

An angiography catheter is an important instrument widely used in medical imaging examinations, primarily for the diagnosis and interventional treatment of cardiovascular, cerebrovascular, and peripheral vascular diseases. With the development of modern medical technology, the application of angiography catheters in clinical practice is becoming increasingly widespread, providing doctors with precise vascular images to effectively guide disease diagnosis and treatment plans. Basic Concepts of Angiography Catheters An angiography catheter is a thin, flexible medical catheter that allows contrast agents to be injected into the body through a vascular access, enabling the observation of the structure and function of blood vessels using imaging equipment such as X-rays or CT scans. Common angiography procedures include coronary angiography, cerebral angiography, and renal artery angiography. With the increasing demands for medical device quality, OEM angiography catheters have become an important choice for medical device manufacturers. Since its establishment in 2014, LINSTANT has focused on the extrusion, coating, and post-processing technologies of medical polymer tubing, providing OEM angiography catheters with precise, safe, and diversified process development capabilities and stable production capacity. Clinical Applications of Angiography Catheters Cardiovascular Disease Diagnosis Angiography catheters are widely used in cardiovascular disease diagnosis, especially in coronary angiography. They can accurately visualize the location of coronary artery stenosis or occlusion, providing a basis for interventional treatment. Cerebrovascular Disease Examination Cerebrovascular angiography can use angiography catheters to assess cerebral aneurysms, vascular malformations, and thrombosis, helping doctors develop surgical or interventional plans. Peripheral and Renal Vascular Examination For peripheral artery disease or renal artery stenosis, angiography catheters can also provide direct imaging, assisting in vascular stent implantation or vasodilation treatment. Technical Advantages of Angiography Catheters High-Precision Imaging: Angiography catheters can precisely guide contrast agents into designated blood vessels, achieving high-definition imaging. Flexible Operation: The catheters are highly flexible, adapting to complex vascular pathways and reducing surgical trauma. High Clinical Safety: Under the operation of experienced physicians, the complication rate of angiography catheters is low. OEM Customization Advantages: Leveraging years of experience in medical polymer tubing processing, LINSTANT provides customized production solutions for OEM angiography catheters, ensuring product stability and high-quality standards. Angiography catheters, as essential tools in modern imaging and interventional therapy, play a vital role in the diagnosis and treatment of cardiovascular and cerebrovascular diseases due to their precision, flexibility, and safety. Since its establishment in 2014, LINSTANT has remained committed to its promise to medical device manufacturers, dedicated to providing OEM angiography catheters with comprehensive process development capabilities and reliable production assurance. With continuous technological advancements, the future application prospects of angiography catheters in minimally invasive surgery and precision medicine will be even broader.

With the increasing demand for high-performance conveying materials in industries such as chemical, pharmaceutical, and semiconductor manufacturing, PTFE etched pipes have become a crucial choice for piping systems due to their excellent corrosion resistance and high-temperature stability. Characteristics and Applications of PTFE Etched Pipes PTFE etched pipes are typically made of polytetrafluoroethylene (PTFE) material, with improved surface adhesion through a special etching process. This type of pipe not only possesses extremely strong chemical corrosion resistance but can also withstand high and low temperature environments, making it widely used in high-purity chemical conveying and precision equipment. In the semiconductor, pharmaceutical, and electronic chemical industries, PTFE etched pipes are commonly used to convey corrosive chemicals, acid and alkali liquids, and ultrapure water systems. Their unique corrosion resistance makes them a superior alternative to stainless steel or ordinary plastic pipes. LINSTANT's Production Capabilities As an industry leader, LINSTANT boasts nearly 20,000 square meters of cleanroom space, strictly adhering to GMP requirements. Our production facilities include: 15 imported extrusion lines (various screw sizes, capable of single-layer, double-layer, and triple-layer co-extrusion) 8 PEEK extrusion lines 2 injection molding lines Nearly 100 sets of weaving, springing, and coating equipment 40 sets of welding and forming equipment These advanced resources ensure efficient and stable order fulfillment capabilities in the production of PTFE etched pipes and related products, providing reliable product assurance for our customers. Why PTFE Etched Pipes Also Require Connecting Layers Although PTFE etched pipes themselves possess excellent corrosion resistance and physical properties, the connection between pipes and fittings remains crucial in actual piping systems. The main reasons include the following: Ensuring Pipeline Sealing PTFE has a smooth surface and is not easily adhered to. Without a suitable connecting layer, micro-gaps may form between the fittings and the pipe, leading to leakage risks. A proper connecting layer can improve the sealing of the joints, ensuring safe system operation. Enhancing Mechanical Strength Under high pressure or long-term transportation environments, the strength of the pipe itself may be insufficient. The connection layer disperses pressure, enhances interface stability, and prevents pipeline damage due to external forces or temperature changes. Adapting to Different Material Interfaces In practical applications, PTFE etched pipes are often connected to metal, plastic, or other types of pipes. The presence of the connection layer effectively buffers the differences in thermal expansion and contraction between materials, preventing excessive interface stress that could cause cracks or loosening. Choosing the Appropriate Connection Layer Solution For PTFE etched pipes, selecting the appropriate connection layer material and process is crucial. Common solutions include: High-performance sealants: Suitable for medium and low-pressure systems, facilitating construction and maintenance. Mechanical crimp fittings: Suitable for high-pressure or high-temperature environments, providing enhanced stability. Specialized adhesives: For etched surface-treated PTFE pipes, ensuring a long-term, strong bond. When selecting a connection solution, a comprehensive evaluation should be conducted based on pipeline pressure, media properties, temperature, and installation environment to ensure system safety and long-term reliable operation. Even with high-performance PTFE etched pipes, the connection layer remains crucial in actual piping systems. Leveraging its advanced production facilities and extensive manufacturing experience, LINSTANT provides customers with high-quality PTFE etched pipes and related solutions. Proper selection and installation of the connection layer not only improves the pipe's sealing and mechanical strength but also extends its service life and reduces system maintenance costs.

In modern manufacturing and the medical device industry, Heat Shrink Tubing is widely used due to its excellent insulation, protection, and marking capabilities. With the continuous expansion of application scenarios, the materials, structures, and specialization of heat shrink tubing are also rapidly developing, especially in the medical Heat Shrink Tubing market, which demands extremely high quality and performance, showing a trend towards diversification. I. Basic Classification of Heat Shrink Tubing Currently, the most common heat shrink tubing on the market is classified according to material, shrinkage ratio, and application field: 1. Classification by Material Different materials of heat shrink tubing possess different characteristics, meeting the needs of multiple industries. Among the most representative are: PE Heat Shrink Tubing (Polyethylene): Good flexibility, widely used, and a common insulating material for electronic wire harnesses. FEP Heat Shrink Tubing: High temperature resistance, corrosion resistance, and high transparency; often used in precision components such as medical device endoscopes and catheters. PEBAX Heat Shrink Tubing: Combines flexibility and high strength, with excellent biocompatibility; prominently used in medical catheters and surgical instruments. PTFE Heat Shrink Tubing (Teflon): Resistant to extreme temperatures and with a low coefficient of friction, suitable for high-end medical equipment, aerospace electronics, and other fields. PVDF Heat Shrink Tubing: Highly resistant to chemical corrosion and radiation, widely used in the medical and energy industries. PFA Heat Shrink Tubing: Excellent high-temperature resistance, suitable for medical environments with extremely high stability requirements. PET Heat Shrink Tubing: High strength and good shrinkage performance, commonly used for electrical insulation and surface protection of medical devices. Furthermore, LINSTANT offers a more comprehensive product line, covering various sizes and complex structures, including extruded single/multi-layer tubing, single/multi-lumen tubing, single/double/triple-layer balloon tubing, spiral/braided reinforced sheaths, and special engineering materials such as PEEK/PI tubing. It also provides diverse surface treatment solutions to fully meet the high standards of precision, durability, and biocompatibility required by medical devices. II. Classification by Shrinkage Ratio Heat Shrink Tubing generally has different shrinkage ratios such as 2:1, 3:1, and 4:1. The higher the value, the wider the range of applicable outer diameters. For example, precision structures such as medical catheter assemblies and cardiac interventional devices often use 3:1 or 4:1 heat shrink tubing to improve assembly stability. III. Characteristics and Application Trends of Medical Heat Shrink Tubing In the medical field, heat shrink tubing is not only a simple protective material, but also a key auxiliary structure for equipment performance and safety. Our company's medical heat shrink tubing has the following advantages: 1. High Biocompatibility Made of materials such as FEP, PEBAX, and PTFE, it meets medical-grade standards and is suitable for in vivo or external medical devices. 2. High Transparency and Visibility The high transparency of FEP and PFA materials makes them suitable for applications requiring high visibility, such as endoscopes and guidewire wrapping. 3. High Temperature and Chemical Resistance PTFE, PVDF, and PFA heat shrink tubing can withstand high-temperature sterilization and medical disinfectants, making it suitable for reusable or high-temperature environments. 4. Wide Range of Applications Including but not limited to: Interventional Medical Catheter Coating Balloon Catheter Processing Surgical Instrument Coating Insulation Protection for Medical Electronic Components Guidewire Assemblies Endoscopic System Sheaths Combined with LINSTANT's extensive product line, whether single-layer, double-layer, or triple-layer balloon tubing, or spiral/braided reinforced sheaths, they can provide precise protection and performance optimization for medical devices. IV. Future Trends: Lighter, Thinner, and Safer As the medical industry continues to pursue minimally invasive, flexible, and precise solutions, heat shrink tubing is developing towards "ultra-thin walls, high transparency, high flexibility, and enhanced biocompatibility." High-end materials such as FEP, PEBAX, and PTFE will continue to be the core of medical heat shrink tubing R&D, and LINSTANT will continue to provide more comprehensive material and processing solutions to support the innovation and upgrading of medical devices. Heat shrink tubing comes in a wide variety of types, which can be further subdivided according to materials, performance, and application areas. Among them, medical heat shrink tubing, due to its high requirements for performance and safety, has become an important direction for material R&D. LINSTANT offers heat shrink tubing in FEP, PE, PEBAX, PTFE, PVDF, PFA, and PET materials, as well as multi-layer balloon tubing, spiral/braided sheaths, special engineering material tubing, and surface treatment solutions. These products can be widely used in various medical devices, providing customers with comprehensive solutions that offer high performance, reliability, and safety.

In the fields of medical device manufacturing, minimally invasive interventional therapy, and high-precision engineering, polyimide tubing has received widespread attention due to its excellent comprehensive performance. With the continuous upgrading of minimally invasive technology, the application of medical polyimide tubing in clinical fields such as vascular intervention, electrophysiology, urology, and structural cardiology is becoming increasingly prominent. How flexible is polyimide tubing? The answer is very clear: polyimide tubing has excellent flexibility and maintains stable performance over a very wide temperature range. Thanks to the molecular structure of polyimide material, it possesses excellent bending properties while maintaining high strength and high temperature resistance. Whether bent at room temperature or during dynamic movement, polyimide tubing is not easily broken, deformed, or fatigue-induced, making it particularly suitable for components in medical devices that require repeated bending. Typical Applications of Polyimide Tubing in the Medical Field Due to its high mechanical strength, excellent flexibility, and good dimensional stability, medical polyimide tubing has achieved mature applications in multiple clinical fields, including: Vascular Intervention: Used in vascular stent delivery systems, guidewire sheaths, etc. Structural Cardiac Devices: Used in high-precision delivery components and protective cannulas. Electrophysiology: Used in miniature tubing for mapping and ablation of flexible shafts. Urology: Such as stone retrieval basket catheters, ureteroscope-related accessories. Endoscopy: Used in endoscopic catheters, flexible manipulation tubing, etc. These applications place extremely high demands on the material's flexibility, fatigue resistance, dimensional accuracy, and biocompatibility, and polyimide tubing demonstrates its core advantages in these aspects. Why is medical polyimide tubing so popular? Combined Flexibility and High Strength It can withstand repeated bending and torsion in narrow spaces, which is especially crucial for vascular and urinary system devices. High Temperature and Radiation Sterilization Resistance Compatible with mainstream medical sterilization processes, such as high-temperature steam sterilization, ethylene oxide sterilization, or gamma ray sterilization. Excellent Dimensional Stability Maintains extremely high inner diameter accuracy and wall thickness consistency, suitable for the high-precision production of minimally invasive medical devices. Good Biocompatibility Meets the material requirements for medical devices and can be used in disposable or short-term contact products. Multiple Applications Validate the Strength of Polyimide Tubing Besides the medical industry, polyimide tubing is widely used in aerospace, industrial automation, fiber optic protection, and sensor components, further demonstrating its comprehensive advantages in flexibility, temperature resistance, mechanical strength, and chemical stability. LINSTANT: Professional Manufacturer of Polyimide Tubing and Medical Interventional Device Components As a leading manufacturer of precision tubing and medical device components, LINSTANT boasts a nearly 20,000 square meter cleanroom, fully compliant with GMP requirements. Our robust production system is the core strength that allows us to provide high-quality polyimide tubing and custom components to global medical device companies: 15 imported extrusion production lines: offering diverse screw sizes to support single-layer, double-layer, and triple-layer co-extrusion. 8 PEEK extrusion production lines: meeting the demand for high-performance polymer tubing. 2 injection molding production lines: capable of producing precision medical-grade injection molded parts. Nearly 100 sets of weaving/spring/coating equipment. 40 sets of welding and forming equipment. This comprehensive production capacity layout enables LINSTANT to achieve efficient order fulfillment in the manufacturing of polyimide tubing, medical microcatheter assemblies, and various interventional device parts, while ensuring product consistency and high reliability. Conclusion Polyimide tubing not only boasts excellent flexibility but also excels in the medical industry due to its high strength, high reliability, and adaptability to various applications. Whether in vascular, structural cardiology, electrophysiology, or urology, medical polyimide tubing is becoming a core material choice for an increasing number of medical device companies.