As a new-type foreign trade service provider driven by dual engines of technology commercialization and foreign trade services, HiSiaddi has established a "1+2+3+4=1" service system and can supply polyimide products from multiple well-known original manufacturers.
As a foreign trader with R&D capabilities, HiSiaddi has conducted multiple rounds of on-site inspections of polyimide manufacturers relying on technological transformation cooperation with factories, possessing objective and in-depth understanding of different brands. Therefore, we regularly analyze polyimide brands and manufacturers for customers to help them select matching products. Below is a brand recommendation case.
Please contact HiSiaddi customer service if you require further comparative analysis of brands and models.
The cooperating customer is MedPrecision AG based in Zurich, Switzerland, a time-honored listed manufacturer of precision medical components in Switzerland. With over 30 years of experience in R&D and production of minimally invasive interventional medical devices, implant auxiliary equipment, and high-end medical imaging probe accessories, it supplies tertiary hospitals across Europe and supporting supply chains for Siemens Healthineers and Stryker. It belongs to the mid-to-high-end premium customer tier for global medical-grade PI raw material procurement. The enterprise has long sourced medical-grade polyimide raw materials from DuPont and Mitsui Chemicals in Europe and America. In 2025, impacted by rising overseas raw material prices, extended delivery cycles of European and American manufacturers, and refusal to accept small-batch customized orders, the enterprise’s procurement and R&D director contacted HiSiaddi New Materials Foreign Trade based in Shanghai via the Swiss Industrial Chemical Raw Materials Chamber of Commerce, planning to screen compliant medical-grade PI raw materials in China for three product lines: heat insulation gaskets for minimally invasive surgical instruments, insulating skeletons for endoscope probes, and disposable precision injection molded components. The initial trial procurement volume totaled 420 kg, and all products must comply with three authoritative certifications: ISO10993 biocompatibility, EU REACH, and FDA medical contact food safety. Recycled modified raw materials and low-grade general industrial PI raw materials are strictly rejected.
Having long purchased imported brands, the customer was completely unfamiliar with leading domestic Chinese polyimide manufacturers, product positioning of each brand, and performance differences between grades. The customer independently contacted four well-known domestic PI manufacturers for sample inquiries, yet each manufacturer only promoted its own products from a business standpoint, elaborating extensively on its own product strengths and mainstream grade parameters while avoiding objective horizontal analysis of competitors’ advantages, and disclosing none of its own product shortcomings or competitor applicable scenarios. The customer received product data sheets with inconsistent parameters and multiple batches of samples from different grades, making horizontal comparison and selection impossible. Some samples developed defects including hydrolysis cracking during medical disinfection, high-temperature sterilization deformation, and excessive biological leachables after small-scale on-machine testing, stalling the selection process for nearly two months and delaying progress of the R&D project. The customer ultimately fully entrusted HiSiaddi, as a neutral third-party foreign trade service provider, to leverage industry resources to sort out leading domestic mid-to-high-end PI brands, horizontally decompose advantages and disadvantages of products from 3–5 major manufacturers, and accurately screen brands and grades aligned with the customer’s medical application conditions.
The customer independently contacted four leading domestic mid-to-high-end PI manufacturers (Brands A, B, C, D), all high-end domestic factories covering electronics, aerospace, and medical applications without low-end workshop-grade products. However, sales and technical staff from all four manufacturers only focused on listing their own product highlights such as thermal stability, mechanical properties, and modification technologies during communication. They avoided discussing formula advantages and applicable scenarios of competing brands, only deflecting inquiries about competing grade suitability with vague remarks about differing product routes without objective horizontal analysis of strengths and weaknesses. Unable to distinguish true focus areas of each brand based solely on one-sided manufacturer introductions, the customer could not judge product compatibility.
The customer’s demand covered three distinct working conditions:
1. Extrusion-grade PI for endoscope skeletons, requiring resistance to repeated 134℃ high-pressure steam sterilization and tolerance to medical alcohol and ethylene oxide corrosion;
2. Cast film-grade PI for surgical gaskets, requiring ultra-thin thickness and low shrinkage with minimal biological leachables;
3. Modified injection molding PI for precision small parts, requiring high rigidity and low creep.
Each of the four manufacturers promoted 2–3 mainstream grades, resulting in a total of 11 different PI grade data sheets. Some manufacturers adopted testing standards inconsistent with international medical testing criteria, with varying testing environments for identical indicators rendering direct data comparison impossible. The pass rate of samples tested at the customer’s European laboratory fell below 35%, causing massive sample waste.
Within a single brand, PI products are classified into general industrial grade, electronic grade, and medical-special modified grades, with massive gaps in formulas and purification processes between different grades of the same manufacturer. Lacking knowledge of grade classification, the customer encountered manufacturers passing off high-grade electronic PI as medical-grade samples for testing. While samples met standards under room-temperature testing, performance plummeted after high-temperature high-pressure sterilization and immersion in medical reagents, failing to meet ISO10993 biological safety standards. The customer once questioned the overall quality of domestic PI and considered abandoning domestic procurement to resume purchasing European and American raw materials.
Combining three categories of medical device operating environments, physical and chemical indicator requirements, and certification standards, HiSiaddi leveraged years of domestic PI supply chain resources to screen five leading domestic polyimide manufacturers focused on mid-to-high-end markets: Huida New Materials, Bangkai High-Tech, Zhongyan Special Plastics, Huachuang Polymer, and Dingheng New Materials. All five enterprises hold mass production qualifications for medical-grade PI and complete laboratory testing systems, with products benchmarked against mid-to-high-end product lines of global front-runners DuPont and Ube Industries, excluding low-grade industrial PI from small workshops.
HiSiaddi collected full-spectrum data covering formula systems, production processes, measured physical properties, applicable fields, and compliance qualifications of mainstream grades from all five manufacturers. Setting aside commercial interests tied to brand cooperation, it decomposed the strengths and weaknesses of each brand from a neutral third-party perspective:
1. Huida New Materials: Strengths lie in modified thermoplastic injection molding PI with mature fluorine-containing copolymer formulas, outstanding hydrolysis resistance and tolerance to medical disinfectants; weakness: limited ultra-thin film product lines with few available film grades.
2. Bangkai High-Tech: Industry benchmark for film-grade PI with mature casting processes and leading low-leachable medical film technology; weakness: limited varieties of modified injection molding grades with high minimum order quantities for customized modifications.
3. Zhongyan Special Plastics: Full-category layout covering extrusion, film, and modified injection molding with balanced comprehensive performance; weakness: relatively high pricing for specialized medical modified grades.
4. Huachuang Polymer: Cost-effective specialty fluorine-containing PI with excellent high-temperature resistance; weakness: mediocre polar solvent resistance of unmodified general PI.
5. Dingheng New Materials: Military-to-civilian PI manufacturer with high-purity monomer raw materials and excellent biocompatibility; weakness: extended sample delivery cycles for small-batch orders.
HiSiaddi assisted the customer in defining three red lines for technical indicators: no deformation after five cycles of 134℃ high-pressure steam sterilization, ISO10993 cytotoxicity Grade 0, and compliance with REACH restricted substance limits. Targeted samples of candidate grades were requested from all five brands, and unified testing was conducted at CNAS-accredited domestic third-party laboratories following standardized Swiss medical testing criteria to eliminate data deviations caused by inconsistent self-test standards adopted by each manufacturer.
After two rounds of physical and chemical testing plus biocompatibility evaluation, combined with feedback from small-scale trials at the customer’s Swiss laboratory, two mid-to-high-end brands were selected from the five manufacturers with three precisely matched grades: ① Huida New Materials TP-MED01 modified thermoplastic PI (injection molding grade): Suitable for precision injection molded minimally invasive surgical instrument parts, fluorine-containing copolymer modified, resistant to immersion in medical disinfectants, with full ISO10993 medical certification. ② Huida New Materials EX-MED03 extrusion-grade PI: Suitable for extrusion molding of endoscope probe skeletons, dimensional change rate <0.3% under alternating high and low temperatures, free of cracking after repeated high-temperature sterilization. ③ Bangkai High-Tech FIL-MED07 ultra-thin medical PI film: 7.5μm thickness, low leachables and low shrinkage, dedicated to surgical heat insulation gaskets, with biological leachable indicators superior to DuPont medical raw materials previously used by the customer.
HiSiaddi also objectively informed the customer of reasons for excluding the remaining three brands: Zhongyan Special Plastics met all indicators but exceeded the customer’s cost budget; conventional PI from Huachuang failed resistance testing against medical alcohol reagents; Dingheng New Materials could not match the customer’s R&D timeline for small-batch sample delivery. All explanations were fully disclosed to the customer to ensure fully justified brand and grade selection.
Throughout the selection process, HiSiaddi strictly controlled raw material grades, prohibiting manufacturers from passing off industrial-grade or electronic-grade PI as medical-grade samples. It verified that Huida and Bangkai adopt high-purity imported monomers for all raw materials, with dedicated Class 100,000 medical dust-free workshops for production. Each batch of products is accompanied by COA factory test certificates and third-party medical certification reports. Both selected brands are domestic benchmarks for medical PI, with products consistently supplied to listed domestic high-end medical device manufacturers. Their quality benchmarks mid-tier grades of imported European and American raw materials, reducing procurement costs by 27% compared with DuPont medical PI while meeting all customer technical indicators. HiSiaddi coordinated split small-batch scheduling at both factories, breaking high minimum order quantity thresholds typical of large manufacturers to match the customer’s demand for batch delivery of the initial 420 kg split across multiple specifications.
HiSiaddi fully handled complete compliance formalities for the three product grades: Authorized SGS to conduct three tests including ISO10993 biocompatibility, FDA medical contact safety, and REACH compliance in accordance with Swiss medical product access specifications, issuing official bilingual Chinese-English test reports; Assisted both manufacturers in issuing certificates of origin, product material traceability lists, and MSDS chemical safety instructions, completing pre-declaration for Swiss CH-REACH in advance to avoid customs inspection and detention risks for medical chemicals upon arrival in Switzerland; Products were independently vacuum aluminum foil sealed and packed under medical-grade dust-free conditions, shipped via constant-temperature containers by sea to Zurich, Switzerland, with full temperature and humidity control to guarantee raw materials could directly enter production lines upon port arrival.
1. Smooth Delivery of Initial Procurement: The full 420 kg batch of three PI grades was produced and delivered within 32 days. Full incoming re-inspection at MedPrecision AG’s Swiss factory yielded fully qualified results, with mass production yield of the three categories of medical components stabilized above 98.5%. All long-term aging tests including high-temperature sterilization and medical reagent immersion passed, completely resolving scrappage issues caused by incorrect grade selection in earlier trials. The customer abandoned its original plan to resume purchasing European and American raw materials, with the initial domestic raw material batch successfully put into mass production.
2. Signing of Long-Term Framework Cooperation Agreement: Half a year after cooperation launch, the customer signed an annual procurement framework agreement with HiSiaddi, with total annual batch procurement of various medical-grade PI from Huida and Bangkai reaching 3.7 tons. Subsequent R&D and grade selection for new products including degradable modified PI and transparent medical PI were all entrusted to HiSiaddi for third-party brand evaluation and selection.
3. Optimization of Customer Domestic Procurement Model: Following this neutral selection service, all subsequent domestic raw material procurement by the customer will appoint HiSiaddi as the third-party selection service provider, eliminating independent inquiries to individual raw material manufacturers. Relying on HiSiaddi’s objective and professional multi-brand evaluation capabilities, the customer continues to expand its domestic mid-to-high-end PI supply chain, breaking its previous sole reliance on imported European and American supplies. The customer also leveraged its industry resources to refer two other listed Swiss medical enterprises to HiSiaddi for PI selection and procurement cooperation.
This case centered entirely on mid-to-high-end specialized medical-grade polyimide for implant auxiliary equipment and minimally invasive precision surgical instruments, subject to stringent access standards distinct from low-cost low-grade electrical insulation PI available on the market. Breaking the typical foreign trade model of relying on a single factory and promoting a single brand for profit, HiSiaddi adopted a neutral third-party perspective to horizontally compare strengths and weaknesses of multiple leading domestic mid-to-high-end PI brands, eliminating information barriers created by one-sided self-promotion from individual manufacturers. Combining professional chemical technology with end-user working conditions, it accurately narrowed down suitable brands and grades, establishing itself as a trusted procurement service provider for overseas mid-to-high-end customers through objective and professional selection services. This represents the core competitive advantage distinguishing refined chemical foreign trade enterprises from low-volume commodity resellers.
Please contact HiSiaddi customer service if you require further comparative analysis of brands and models.
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