One-stop solution provider in the industrial sealing sector
Zhenjiang Hansa Sealing Components Co., Ltd.
Since 2005, Hansa has been providing export and international trade services, with a strong focus on the R&D, manufacturing, and sales of high-performance seals and plastic profiles. We are a one-stop solution provider in the industrial sealing sector. To date, we have established long-term partnerships with more than 800 customers worldwide, serving diverse industries such as chemicals, electronics, healthcare, and automotive. Leveraging a dual-track service model that combines standard components with custom solutions, we have earned the trust of clients both domestically and internationally as a reliable partner for sealing solutions.
We operate a 12,000-square-meter standardized production facility equipped with end-to-end capabilities, including precision extrusion and CNC machining. Our products are certified to multiple international standards, such as ISO 9001, FDA, RoHS, REACH, MSDS, and UL94 V0, ensuring full supply-chain compliance and quality from raw materials to delivery.
Hansa is committed to becoming a trusted partner in the global industrial sealing industry, leveraging its expertise in materials technology, flexible customization capabilities, and rapid response times to help customers overcome sealing challenges and achieve mutually beneficial value creation.
Over 20 years of industry experience
Standardized Production Workshop
Long-term cooperative clients
International Certification
Certified to multiple international standards, including ISO 9001, FDA, RoHS, REACH, MSDS, and UL94 V0.
Corporate Culture
Quality Builds Our Reputation; Compliance Fuels Our Long-Term Success
Adhering to multiple international certification standards, we implement rigorous quality control across the entire value chain, uphold a compliance-driven business philosophy, earn the trust of global customers through superior product quality, and fulfill our responsibilities in the industrial sector.
Customer-centric, empowering win-win
Positioned as a “global trusted partner for industrial sealing,” we leverage a dual-track service model to precisely align with customer needs, help resolve challenging sealing issues, and deliver mutually beneficial outcomes.
Deeply cultivate and act with steadfastness; innovate to achieve lasting success.
Since 2005, the company has been deeply rooted in the industry, focusing on the R&D and manufacturing of core products, prioritizing technological and equipment upgrades, leveraging innovation to drive growth, and striving to become a global benchmark in the industrial sealing sector.
Qualifications and Honors
We have obtained numerous international certifications, including ISO 9001, FDA, RoHS, REACH, MSDS, and UL94 V0, ensuring compliance and quality across the entire product lifecycle—from raw materials to delivery.
From Prototype to Mass Production
Integrated Specialty Plastics and Metal Processing Solutions
CNC Precision Machining
01
Professional Technical Introduction
By employing a high-speed, precision spindle and optimizing toolpaths with dedicated engineering-plastic cutting tools, combined with low-temperature machining and layered milling for easily deformable materials such as PTFE and PEEK, material creep and dimensional drift are effectively controlled. This ensures stable machining accuracy for thin-walled parts, deep-cavity components, and porous structures even during extended operations, enabling the simultaneous machining of both soft and hard materials.
Applicable material:PTFE, UHMWPE, nylon, PEEK, rubber, PP, PE, PVC, PVDF, silicone, polyurethane, metals (aluminum, stainless steel, copper, etc.)
• Multi-axis CNC milling/turning for complex geometries
• Tolerances as tight as ±0.02 mm, meeting the requirements for high-precision seals, bushings, and structural components.
• Supports 3-, 4-, and 5-axis machining, capable of processing contoured slots, threaded holes, and thin-walled structures.
• Suitable for: sealing gaskets, bearing bushings, wear-resistant sliders, insulating supports, metal structural components, and polyurethane buffer blocks.
Core Advantages
• Multi-axis precision milling/turning
• ±0.02 mm ultra-high tolerance control
• Machining of Complex Geometries and Thin-Walled Structures
• Moldless, rapid prototyping
Laser Cutting and Engraving
02
Professional Technical Introduction
An adaptive cutting system featuring dual fiber/CO₂ lasers automatically adjusts power, focal length, and cutting speed based on the melting point, density, and flame-retardant properties of different plastics, enabling carbon-free, char-free cutting of corrosion-resistant sheets such as PVDF and PTFE. The resulting cut surfaces exhibit exceptional perpendicularity and flatness, meeting stringent sealing and assembly requirements.
Applicable material:PTFE, nylon, UHMWPE, certain rubbers, PP, PE, PVC, PVDF, and metal sheets
• High-precision 2D cutting with smooth, burr-free edges
• Can be engraved with logos, scales, and textures to enhance recognizability.
• Suitable for: sealing gaskets, insulating gaskets, label boards, custom-shaped sheets, metal nameplates, and PVC protective covers.
Core Advantages
• High-precision cutting, ±0.1 mm accuracy
• Non-contact processing, no stress-induced deformation
• Supports engraving of complex patterns and text
• Rapid prototyping and flexible small-batch production
Injection Molding
03
Professional Technical Introduction
By employing closed-loop injection control and multi-stage holding pressure processes, precise temperature and mold-temperature control is achieved for high-temperature engineering plastics such as PEEK and nylon, effectively reducing sink marks, porosity, and warpage. This enables stable molding of specialty formulations—including glass-fiber-reinforced, wear-resistant, and hydrolysis-resistant grades—while meeting medical and food-grade standards.
Applicable material:Nylon, PEEK, UHMWPE, modified PTFE composites, PP, PE, PVC, polyurethane
• Multi-axis CNC milling/turning for complex geometries
• Tolerances as tight as ±0.02 mm, meeting the requirements for high-precision seals, bushings, and structural components.
• Supports 3-, 4-, and 5-axis machining, capable of processing contoured slots, threaded holes, and thin-walled structures.
• Suitable for: sealing gaskets, bearing bushings, wear-resistant sliders, insulating supports, metal structural components, and polyurethane buffer blocks.
Core Advantages
• Low-to-high volume production (100–100k+ units)
• Custom material modification (reinforcement, wear resistance, temperature resistance)
• Stable dimensional accuracy and repeatability
• Supports insert molding and two-color molding
3D printing
04
Professional Technical Introduction
By employing high-temperature chamber printing and layered sintering technologies, we achieve density and mechanical strength for high-performance materials such as PEEK and nylon that are comparable to injection-molded parts. This approach supports the one-step fabrication of internal flow channels, hollow structures, and custom-shaped assembly components, enabling the validation of complex functional parts without the need for post-processing assembly or joining.
Applicable material:Nylon (SLS), PEEK (high-temperature SLS), TPU rubber (FDM/SLA), PP, polyurethane, metal (SLM)
• Rapid prototyping and direct printing of complex structures
• Nylon SLS: high strength, fatigue resistance, suitable for functional test parts
• PEEK high-temperature printing: high-temperature components for medical and aerospace applications
• Metal SLM: high-performance metal parts such as stainless steel and titanium alloys
• Suitable for: functional test prototypes, custom fixtures, small-batch custom parts, and lightweight metal structural components
Core Advantages
• No molds required, rapid iteration
• Nylon/PEEK/metal printed parts can be used directly for operational testing.
• One-step molding of complex internal flow channels and lattice structures
• Small-batch custom production (1–100 units)
Thermoforming and Bending
05
Professional Technical Introduction
By employing zone-specific constant-temperature heating combined with a progressive bending process, the heating depth and cooling rate are precisely controlled according to the specific thermal deformation temperatures of different plastics, thereby preventing whitening, cracking, and springback in high-temperature-resistant materials such as PTFE and PVDF. This ensures stable bending angles and maintains a flat, distortion-free panel surface.
Applicable material:PTFE, nylon, UHMWPE, PP, PE, PVC, and PVDF sheets
• Controlled heating bending to form arc-shaped, U-shaped, and channel-shaped structures
• Stress-free cracking, angular accuracy ±1°
• Suitable for: guards, deflectors, insulated bends, wear-resistant linings, PVC cable trays, and PP containers.
Core Advantages
• Precise angle control, ±1° accuracy
• Stress-free forming to prevent cracking
• Supports bending of large-size sheets
• Can be combined with CNC post-processing to produce complex shapes
Welding and Bonding
06
Professional Technical Introduction
For non-polar plastics such as PP, PE, and PTFE, a surface activation treatment combined with a dedicated adhesive system is employed; for PVC and PVDF, hot-air or infrared welding is used to ensure that the weld strength is comparable to that of the base material, with no leakage or cracking, thereby meeting requirements for acid- and alkali-resistance, high-pressure sealing, and structural load-bearing.
Applicable material:PTFE, UHMWPE, nylon, rubber, PP, PE, PVC, PVDF, silicone, polyurethane
• Heat-plate welding, ultrasonic welding, and infrared welding for seamless splicing
• Special adhesives for bonding dissimilar materials (e.g., PTFE + metal, rubber + plastic, silicone + metal)
• Suitable for: large liners, sealing assemblies, multilayer composite structures, PVC pipes, and silicone seals.
Core Advantages
• Seamless welding with strength approaching that of the base material
• Adhesives are compatible with a wide range of specialty plastics and metals.
• Enables integrated molding of large structural components
• Excellent chemical and temperature resistance
Surface Treatment and Finishing
07
Professional Technical Introduction
A combined physical and chemical polishing process is employed to achieve a scratch-free, mirror-like finish on plastic components; anodizing, passivation, and sandblasting are applied to metal parts; and wear-resistant, low-friction coatings are applied to seals, comprehensively enhancing the products’ weather resistance, wear resistance, electrical insulation, and food-contact compliance.
Applicable material:A full range of specialty plastics, metals, silicone, and polyurethanes.
• Polishing: mirror finish, matte finish, and textured finish—enhancing both appearance and wear resistance.
• Spraying/Printing: UV inkjet printing, signage printing, weather-resistant coatings
• Coatings: PTFE coating, wear-resistant coating, insulating coating, metal anodizing
• Suitable for: medical components, food-contact components, cosmetic components, corrosion-resistant metal parts, and silicone keypads.
Core Advantages
• Meets FDA/food-contact-grade surface requirements
• Enhanced wear resistance, chemical resistance, and weather resistance
• High-resolution logo and graphic printing
• Anti-corrosion, wear-resistant, and insulating treatment for metal components
Compression Molding
08
Professional Technical Introduction
By employing a combined process of isostatic pressing and high-temperature mold pressing, PTFE and PEEK powders undergo a fully controlled sequence of pre-compaction, sintering, and final shaping, thereby enhancing material density and creep resistance. This approach enables the fabrication of extra-large, ultra-thick, and complex-shaped components that are difficult to machine using CNC, while delivering outstanding dimensional stability.
Applicable material:PTFE, PEEK, UHMWPE, rubber, silicone, polyurethane, PP, PE
• Compacting powders or preformed blanks into dense components using high pressure and high temperature
• Capable of producing large-size, thick-walled, high-density seals, bushings, and custom-shaped blocks.
• Suitable for: large PTFE sealing rings, thick-walled PEEK structural components, rubber buffer blocks, silicone sealing rings, and polyurethane shims.
Core Advantages
• Capable of molding extra-large and thick-walled components (breaking through the limitations of CNC machining)
• High material density, with excellent wear resistance and creep resistance.
• Enables integrated molding of complex cross-sections and multi-cavity designs
• Suitable for applications with extremely high requirements for strength and sealing performance
Precision Turning
09
Professional Technical Introduction
High-rigidity CNC lathes equipped with specialized elastic fixtures are employed, utilizing constant linear speed turning and ultra-low feed rates for both soft materials such as silicone and polyurethane and high-hardness materials such as PTFE and PEEK, thereby ensuring that roundness, cylindricity, and end-face runout meet the stringent requirements for ultra-precision sealing fits.
Applicable material:Applicable materials: PTFE, nylon, PEEK, UHMWPE, rubber, PP, PE, PVC, PVDF, silicone, polyurethane, and metal rods/tubes.
• High-precision turning machining for the production of bushings, sleeves, sealing rings, and threaded components.
• Capable of machining precision features such as internal and external circles, tapered surfaces, threads, and end-face grooves.
• Tolerances as tight as ±0.01 mm, meeting the requirements for high-speed rotation and sealing fits.
• Suitable for: PTFE bushings, PEEK valve seats, nylon gear shafts, rubber buffer sleeves, and metal shaft components.
Core Advantages
• Ultra-high precision, with tolerances as tight as ±0.01 mm
• Efficient and stable production suitable for rotationally symmetric parts
• Capable of machining thin walls, deep holes, and high-precision threads
• Combined with CNC milling to achieve complex rotary and freeform structures.
Extrusion molding
10
Professional Technical Introduction
Utilizing single- or twin-screw extrusion combined with a vacuum calibration system, this process enables precise control of extrusion speed, temperature, and draw tension, ensuring uniform inner and outer diameters and consistent wall thickness in rod and pipe products. It supports long-length, defect-free continuous molding of corrosion-resistant materials such as PVDF and PVC, with custom-shaped cross-sections available upon request.
Applicable material:PP, PE, PVC, PVDF, nylon, polyurethane
• Continuous extrusion production of bars, pipes, profiles, films, and more
• Customizable cross-sectional shapes to meet the demands of long-length, continuous production
• Suitable for: PVC pipes, PP profiles, PE films, PVDF corrosion-resistant piping, and polyurethane sealing strips.
Core Advantages
• Continuous production, low cost, high efficiency
• Customizable complex cross-section profiles
• Long-length components are seamless, ensuring structural stability.
• High material utilization
Precision Stamping and Forming
11
Professional Technical Introduction
High-speed, precision stamping dies are used in conjunction with servo presses to perform continuous progressive stamping on metal and engineering-plastic sheets, integrating blanking, bending, drawing, and forming into a single process. The stamped edges are smooth and burr-free, with excellent dimensional consistency, making this technology particularly well-suited for the high-volume production of ultra-thin gaskets and seals.
Applicable material:Metals (stainless steel, copper, aluminum, galvanized sheet, etc.), PP, PE, PVC, PVDF, silicone, polyurethane, and others.
• Utilizing high-precision dies to perform forming operations on sheet metal, including blanking, bending, deep drawing, and embossing.
• Capable of manufacturing high-precision, highly consistent gaskets, brackets, housings, seals, and other components.
• Suitable for: metal stampings, thin-wall PP/PE housings, PVC gaskets, silicone sealing washers, and polyurethane buffer components.
Core Advantages
• Ultra-high production efficiency, ideal for high-volume manufacturing (10k–1M+ units)
• Excellent dimensional consistency, with tolerances as tight as ±0.05 mm
• Enables complex 3D forming and multi-step continuous stamping
• High material utilization and significant cost advantages
Customized Material Selection and Solution Design
12
Professional Technical Introduction
Through comprehensive material matching based on mechanics of materials, temperature resistance, chemical resistance, coefficient of friction, and processability, we provide one-stop material selection and structural optimization tailored to diverse operating conditions such as sealing, wear resistance, electrical insulation, load-bearing, and corrosion protection. Simultaneously, we evaluate manufacturing processes, tolerances, and costs to deliver the most cost-effective solution.
Applicable material:Full range of PTFE, UHMWPE, nylon, PEEK, PP, PE, PVC, PVDF, silicone, polyurethane, and metals.
• Recommends the optimal material based on operating conditions (temperature, pressure, process medium, and load).
• Provide material comparisons and selection recommendations, balancing performance and cost.
• Engage from the design stage to optimize manufacturability, reducing costs and lead times.
Standardized Production Workshop
Factory Equipment
We operate a 12,000-square-meter standardized production facility equipped with end-to-end capabilities, including precision extrusion and CNC machining. Our products are certified to multiple international standards, such as ISO 9001, FDA, RoHS, REACH, MSDS, and UL94 V0, ensuring full supply-chain compliance and superior quality from raw materials to final delivery.