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Process engineering guide · China supplier discovery

RTM FRP Manufacturers in China

Resin transfer molding (RTM) places a dry fiber preform inside a rigid two-sided mold, closes and clamps the tool, then injects low-viscosity resin before curing. It is used for repeatable complex parts requiring controlled thickness and finished surfaces on both sides.

RTM composite manufacturers in Chinaresin transfer molding processRTM composite parts manufacturerclosed mold composites
Animated technical schematic: follow material movement, forming action and consolidation. Motion is disabled automatically when reduced motion is preferred.
Geometry
Complex closed-mold parts
Reinforcement
Dry preform
Surface
Two tool-controlled faces
Volume
Medium, scalable
Process principle

How the resin transfer molding process works

The mold cavity fixes geometry while the matched permeability of the preform, vent layout and injection strategy determines whether resin reaches every region before gel.

  1. 01

    Build preform

    Cut, shape and stabilize reinforcement, core and local inserts.

    Control: Verify fiber orientation, areal weight, thickness and permeability consistency.
  2. 02

    Load & close

    Position the preform in the prepared cavity and close the matched tool.

    Control: Check alignment, seals, vents, inserts and clamp condition.
  3. 03

    Prepare resin

    Meter, mix and condition the injection resin system.

    Control: Control ratio, temperature, viscosity, degassing and usable time.
  4. 04

    Inject & vent

    Drive resin through the preform while displaced air exits the planned vents.

    Control: Record pressure, flow time, vent response and vacuum assist if used.
  5. 05

    Cure & demold

    Hold the validated cure, open the tool and finish the molded part.

    Control: Confirm cure, dimensions, surface, internal quality and trim.
Material system

What enters the process

1

Preform

Woven, stitched, unidirectional or 3D reinforcement stabilized to shape.

2

Matrix

Low-viscosity thermoset formulated for injection and the selected cure window.

3

Core & inserts

Compatible closed-cell core and positively located hardware where designed.

4

Tool system

Rigid matched mold, seals, ports, vents, heating and clamping.

Strong process fit
  • Repeat complex shells and structural panels
  • Parts needing two controlled surfaces
  • Integrated preforms, core and inserts
Engineering watch-outs
  • Flow simulation and trials may be needed for large or variable-thickness parts
  • Seal, port and vent changes can invalidate the qualified fill pattern
Buyer audit map

Critical process controls and evidence

A supplier claim is useful only when the process window is tied to the offered material, tooling, drawing revision and production batch.

StageWhat must be controlledEvidence to request
PreformMaterial, architecture, compaction and permeability.Kit traceability, preform traveler and weight/thickness checks.
Injection setupResin ratio and state, tool temperature, ports, vents and vacuum.Approved recipe and pre-injection checklist.
FillPressure-time trace, vent behavior and complete resin arrival.Injection log and alarm/deviation record.
ReleaseCure, dimensions, surface and internal discontinuities.Cure record, inspection report and qualified NDT where required.
Defect diagnosis

Common defects, causes and detection

DEFECT 01

Dry spot

Likely cause: Race tracking, low permeability, closed vent or resin gel before complete fill.

Detection: Visual/thermographic process monitoring, ultrasound or sectioning.

DEFECT 02

Porosity

Likely cause: Air entrapment, leaking mix, inadequate degassing or volatile release.

Detection: Ultrasound, microscopy or density/section checks as specified.

DEFECT 03

Preform wash or distortion

Likely cause: Injection force moves fibers or inserts.

Detection: Witness features, imaging, thickness and fiber-orientation review.

Typical resin transfer molding applications

Automotive structures
Aerospace and rail panels
Marine components
Industrial covers and housings
Source transparency

Technical references reviewed

This guide uses the JEC process taxonomy, CAMX/ACMA/SAMPE review framework and process-specific material from industry associations, national research centers or government laboratories. Sources explain the process; they do not endorse listed suppliers.

Reviewed 16 August 2026. Verify current standards editions, material datasheets and project-specific acceptance requirements before award.

REAL REVIEWED DATA

Approved supplier matches

  1. Jiangsu Jiuding New Materials Co., Ltd. logo
    Verified
    Process
    Fiberglass drawing, modification, weaving and surface treatment
    Standard
    ISO 9001
    MOQ
    500 kg
    Lead time
    35 days

    Jiuding's official English export site describes the business as Jiuding New Material Co., Ltd., formerly Jiangsu Jiuding New Material Co., Ltd. The company states that it was established in 1994 and listed on the Shenzhen Stock Exchange in 2007 under stock code 002201. Its published scope covers fiberglass yarn and fabrics, grinding-wheel reinforcement materials, FRP products, pultruded profiles, gratings, flanges and custom thermoset composite components.

    Product categories
    Pultruded FRP structural profiles, crossarms, handrails and laddersMolded and pultruded FRP grating, stair treads and trench coversFRP flanges, manholes, elbows and couplings
  2. Techstorm Advanced Material Corporation Limited logo
    Process
    Filament winding
    Standard
    ISO 9001 (company-published factory information; current certificate to be confirmed)
    MOQ
    Not publicly listed
    Lead time
    Not publicly listed

    Techstorm Advanced Material Corporation Limited is a Shanghai-headquartered developer and manufacturer of high-performance thermoset materials and identifies itself on its official site by Shanghai Stock Exchange code 601026.SH. Its published portfolio spans wind energy, general composites, new-energy vehicles and industrial adhesives, electrical insulation, and photovoltaics. For general composites, Techstorm lists resin systems for filament-wound cylinders, cable core rods and glass- or carbon-fiber wind-blade spar-cap pultrusion, flame-retardant aircraft seating, carbon-fiber prepreg, and HP-RTM or prepreg battery covers.

    Product categories
    Epoxy resin systems for filament-wound cylindersPultrusion resin systems for cable core rods and wind-blade spar capsFlame-retardant resin and carbon-fiber prepreg for aircraft seating
  3. Wanhua Chemical Group Co., Ltd. logo
    Wanhua Chemical Group Co., Ltd.
    Yantai, Shandong, China
    Process
    Polyurethane composite formulation and application development
    Standard
    ISCC PLUS (MDI, TDI and bio-based polyethers; company-published in 2024)
    MOQ
    Not publicly listed
    Lead time
    Not publicly listed

    Wanhua Chemical is a global advanced-materials and chemical producer headquartered in Yantai, Shandong. Its official site organizes the business across polyurethanes, petrochemicals, performance chemicals and emerging materials, with 14 principal production complexes in China and Europe. For composites, Wanhua publishes foaming and non-foaming polyurethane resin systems, glass-fiber-reinforced PU pultrusion and HP-RTM solutions, plus specialty amines and epoxy-curing-agent raw materials for FRP, high-pressure pipe, prepreg and laminate applications. The present company was established in 1998, with operating roots in a synthetic-leather and MDI project begun in 1978.

    Product categories
    Polyurethane composite resin systemsGlass-fiber-reinforced polyurethane pultrusion systemsHP-RTM polyurethane systems
  4. AOC logo
    AOC
    Nanjing, Jiangsu, China
    Process
    Casting
    Standard
    Not publicly listed
    MOQ
    Not publicly listed
    Lead time
    Not publicly listed

    AOC describes itself as a global supplier of specialty formulations and solutions for conventional composites, coatings and protective barriers, colorants and visual effects, adhesives and specialties. Its Asia-Pacific site publishes Atlac®, Palapreg®, Palatal® and Synolite™ resin products and lists Jinling AOC Formulations Co., Ltd. as its China location in Nanjing, Jiangsu.

    Product categories
    Unsaturated polyester resinsVinyl ester resinsSMC/BMC resin systems and low-profile additives
  5. Newtech Aviation Co., Ltd.
    Changzhou, Jiangsu, China
    Process
    Aerospace composite part design, manufacture, inspection and delivery
    Standard
    The group website says the company obtained AS9100 system certification in 2019. The public page does not provide the certificate number, revision, certification body, scope, site or validity dates; obtain the current certificate and verify its relationship to the actual contracting and manufacturing entity
    MOQ
    Not publicly listed
    Lead time
    Not publicly listed

    Newtech Aviation Co., Ltd. is a distinct Changzhou, Jiangsu legal entity within the Newtech Group ecosystem, focused on aerospace composite parts, automated equipment, production lines and tooling. Its dedicated official profile dates the company to 2017 and says it develops and manufactures composite parts, automation and tools for aerospace customers. China Composites Expo separately lists the exhibitor as NEWTECH AVIATION CO., LTD., publishes booth 7F28 for 2026, and classifies it under fiber-production equipment, finished-composite production equipment, molds, R&D/design and technology transfer. GetFRP separately publishes a materials-led page for Newtech Group Co., Ltd. and an equipment-led page for Newtech Smart Industry Co., Ltd.; this page represents only the Newtech Aviation legal entity and its aerospace parts, special-purpose equipment and tooling scope, so the three remain separate. High-tech-enterprise, customer-project, domestic-first, technology-gap, process and equipment-performance claims are company- or organizer-published and have not been independently verified by GetFRP.

    Product categories
    Aerospace composite structural and interior partsDouble-curvature hat, L-, C- and hat-section stringersT-stiffeners, ribs, beams, frames and filler cores
  6. Nanjing Jufa New Material Co., Ltd. logo
    Process
    Resin formulation and application development for fiber-reinforced composites
    Standard
    ISO 9001
    MOQ
    Not publicly listed
    Lead time
    Not publicly listed

    Founded in 2018, Nanjing Jufa New Material Co., Ltd. develops polyurethane and polyurethane-modified resin systems for fiber-reinforced composites. Its official website publishes material solutions for pultrusion, filament winding, RTM/vacuum infusion, wet compression molding, SMC and prepreg processing. Through cooperation with Kangda New Materials, the published supply scope also includes epoxy resins and polyurethane, epoxy and acrylic adhesives. Jufa highlights applications including photovoltaic frames and supports, energy-efficient window frames, composite pipe, high-speed rail components, chemical cable trays, wind energy and energy storage.

    Product categories
    Polyurethane pultrusion resins, including aliphatic and low-FST systemsPolyurethane filament-winding resinsPolyurethane RTM and vacuum-infusion resins
  7. Wells Advanced Materials (Shanghai) Co., Ltd. logo
    Process
    Specialty formulated and modified epoxy-resin development
    Standard
    IATF 16949:2016
    MOQ
    Not publicly listed
    Lead time
    Not publicly listed

    Wells Advanced Materials (Shanghai) Co., Ltd. was established in 2010 and focuses on specialty formulated and modified epoxy resins for high-performance composite applications. Its official website identifies wind-turbine blades, electrical and electronic insulation and encapsulation, lightweight transportation, sports and leisure equipment, and new-display materials as core markets, supported by subsidiaries and R&D, production and sales operations in Shanghai, Guangzhou and Zhuhai. The company listed on the Shenzhen Stock Exchange's ChiNext market in 2023 under stock code 301555.

    Product categories
    Wind-energy epoxy resin systemsVacuum-infusion and hand-lay-up epoxy systemsEpoxy resin systems for pultrusion and RTM
  8. Process
    Chopped-carbon-fiber pellet compounding
    Standard
    A 2025 Wujin District government profile describes the company as a national high-tech enterprise and a Jiangsu specialized and innovative enterprise, with one provincial engineering-technology research center and one municipal enterprise technology center. Buyers should obtain current authority or company documents and validate the legal entity, reference number, scope and validity
    MOQ
    Not publicly listed
    Lead time
    Not publicly listed

    Changzhou Shenying Carbon Fiber Composites Co., Ltd. is a Changzhou legal entity within the Lianyungang Yingyou industrial group, based in Wujin Economic Development Zone, Jiangsu. Its official profile divides the business into mold engineering, injection molding, blow molding, carbon-fiber-reinforced plastics and carbon-fiber application R&D, and publishes winding, pultrusion, compression molding, autoclave and RTM capabilities. The 2026 China Composites Expo directory classifies its offering under carbon fiber and fabric, epoxy resin, prepreg, and finished composite products or parts. A 2025 Wujin District government profile says the company has developed and produced carbon-fiber composites and products in the West Taihu area since 2011. It is not the same legal entity as GetFRP-listed Zhongfu Shenying Carbon Fiber Co., Ltd. in the CNBM group, and the two records are not merged.

    Product categories
    Carbon-fiber automotive components and structuresRadiolucent carbon-fiber medical panelsCarbon-fiber drive shafts
  9. Chang Zhou Matex Composites Co., Ltd. logo
    Chang Zhou Matex Composites Co., Ltd.
    Changzhou, Jiangsu, China
    Process
    Multiaxial knitting and stitch bonding
    Standard
    Not publicly listed
    MOQ
    Not publicly listed
    Lead time
    Not publicly listed

    Chang Zhou Matex Composites Co., Ltd. is a fiberglass-material manufacturer in Changzhou, Jiangsu. Its official site says the company has developed and produced fiberglass textiles, mats and veils since 2007. The published reinforcement portfolio covers knitted fabrics and mats, chopped strand mats, woven reinforcements and veils, with additional roving, chopped-strand, unsaturated-polyester-resin and vinyl-ester-resin ranges. Matex reports approximately 70 employees, a 19,000 m² facility, about 21,000 tonnes of annual fiberglass capacity and exports to more than 30 countries and regions; these scale and export figures are company-published.

    Product categories
    Unidirectional, biaxial, triaxial and quadraxial fiberglass fabricsPowder- and emulsion-bonded chopped strand matsWoven roving, woven-roving combo mats and fiberglass cloth
  10. Chengdu Zhengxi Intelligent Equipment Group Co., Ltd. logo
    Process
    Composite hydraulic-press engineering, manufacture and customization
    Standard
    Not publicly listed
    MOQ
    Not publicly listed
    Lead time
    Not publicly listed

    Chengdu Zhengxi Intelligent Equipment Group Co., Ltd. is based in Qingbaijiang, Chengdu, Sichuan. The official site says the Zhengxi brand began focusing on hydraulic-forming equipment in 2009 and that the group completed a shareholding reform in 2024. Its composites directory covers SMC, PCM, HP-RTM and carbon-fiber molding presses plus automated SMC, LFT-D, GMT and BMC/DMC compression lines, with wider automation, digital-workshop and smart-factory solutions. China Composites Expo lists the same mainland-China entity and publishes booth 8N08 for 2026 under finished-composite production systems, accessory equipment and tools, mold-related equipment and other equipment and tools. Establishment, group scale, project count, market coverage and technology-position statements are company- or organizer-published and have not been independently site-audited by GetFRP.

    Product categories
    SMC and PCM composite-molding hydraulic pressesHP-RTM high-pressure resin-transfer-molding pressesCarbon-fiber composite-molding hydraulic presses
  11. Beijing Jinghua Parker Polymerization Machinery Equipment Co., Ltd. logo
    Process
    Composite-injection and two-component fluid-equipment design
    Standard
    ISO 9000 quality-management system (company-published wording; confirm the exact standard, current certificate, holder, site, scope and validity)
    MOQ
    Not publicly listed
    Lead time
    Not publicly listed

    Beijing Jinghua Parker Polymerization Machinery Equipment Co., Ltd., trading as JHPK, develops and manufactures polyurethane, polyurea and composite-processing equipment. The company's official Chinese and English sites state that JHPK was established in Beijing in 2003 and opened its Handan, Hebei production base in 2017. The current portfolio covers high-pressure spray/injection equipment, HP-RTM and RTM injection systems, polyurethane-resin pultrusion and winding injection equipment, wet-molding equipment, filament-spray systems, and supporting guns, pumps and heated hoses. Published factory-scale, market-share, patent and overseas-sales figures are company statements and have not been independently verified by GetFRP.

    Product categories
    JHPK-G20A resin-injection equipment for pultrusion machines and winding linesHigh-pressure HP-RTM and RTM injection equipmentHigh-pressure polyurethane and polyurea spray/injection equipment
  12. Shanghai TRONXT New Material Technology Co., Ltd. logo
    Process
    Composite automation-line design and process integration
    Standard
    Not publicly listed
    MOQ
    Not publicly listed
    Lead time
    Not publicly listed

    Shanghai TRONXT New Material Technology Co., Ltd. is a mainland-China supplier of intelligent composite-forming equipment and automated production lines. Its current official website operates under the Shanghai legal entity and publishes a Jinshan manufacturing address, a Taicang delivery address, Shanghai ICP filing, company contacts and news updated into 2026. The site dates the TRONXT business lineage to 2017 while its timeline places company establishment in 2018; this profile uses the published 2017 brand start and advises buyers to confirm the legal incorporation date from the current business licence. The range covers seven equipment families: HP-RTM preforming, CFRTP, WCM, PCM, STM, thermoplastic-sheet overmoulding, and automated cutting and sorting, plus composite manufacturing information systems. China Composites Expo lists the matching business as TRONXT, and the 2026 exhibitor list publishes SHANGHAI TRONXT NEW MATERIAL TECHNOLOGY CO., LTD. at booth 6J12. This page deduplicates the brand shorthand and Chinese/English legal identity as one Shanghai supplier without separately merging the Taicang entity established in 2025.

    Product categories
    Automated HP-RTM preforming machinesCFRTP thermoplastic-sheet compression-moulding cellsAutomated high-speed wet-compression-moulding (WCM) cells
    Websitetronxt.com
  13. Chengdu Chang Yuan Shun Co., Ltd. logo
    Chengdu Chang Yuan Shun Co., Ltd.
    Chengdu, Sichuan, China
    Process
    Glass-fiber roving and chopped-fiber production and supply
    Standard
    Not publicly listed
    MOQ
    Not publicly listed
    Lead time
    Not publicly listed

    Chengdu Chang Yuan Shun Co., Ltd. (CYS) is a reinforcement-fiber and composites supplier in Chengdu, Sichuan. Its current carbon-fiber, general fiberglass and high-silica websites use the same Chengdu legal name, No. 81 Jinshi Road address and telephone numbers, so this page consolidates them into one legal-entity profile. The company dates itself to 2002, says it holds self-managed import/export rights, and presents glass rovings, fabrics, mats and marbles alongside carbon, aramid, quartz and high-silica materials. China Composites Expo lists the same entity as CHENGDU CHANG YUAN SHUN CO., LTD., publishes booth 7S26 for 2026 and categorizes its exhibit under glass yarn, glass fabric/tape/mat, glass textiles, carbon fiber and fabrics, and aramid fiber and fabrics. Founding date, manufacturing capability, export status and product statements are company- or organizer-published and have not been independently site-audited by GetFRP.

    Product categories
    E-glass direct rovings, assembled rovings and chopped strandsChopped-strand, stitched, combination and RTM core matsWoven rovings and multiaxial glass-fiber fabrics
  14. Chengdu Lu Chen New Materials Technology Co., Ltd. logo
    Process
    Hot-melt unidirectional and fabric prepregging
    Standard
    BS EN ISO 9001:2015 and EN 9100:2018 (technically equivalent to AS9100D) — Bureau Veritas certificate CN052498; scope: manufacture of civil-aviation carbon-fiber prepreg and carbon-composite products; issued 2024-12-24, expires 2027-12-23; transcribed from the company-hosted certificate image and not independently status-checked with the issuer by GetFRP
    MOQ
    Not publicly listed
    Lead time
    Not publicly listed

    Chengdu Lu Chen New Materials Technology Co., Ltd. is a high-performance fiber-composites company in Xinjin, Chengdu, Sichuan. Its current official site dates the company to 2013 and presents the development, design, manufacture and sale of epoxy systems; carbon-, aramid- and glass-fiber prepregs; and related composite products. Its published equipment sections cover prepregging, four-axis winding, compression molding, CNC cutting, autoclave, clean-room/laser and high-temperature-oven systems. China Composites Expo lists the same entity as CHENGDU LU CHEN NEW MATERIALS TECHNOLOGY CO., LTD., assigns booth 6Y01 in its 2026 exhibitor list and categorizes the net-show range under glass-fiber woven goods, carbon fiber, aramid, prepreg and finished composite parts. Founding date, manufacturing capabilities and exhibit claims are company- or organizer-published and have not been independently site-audited by GetFRP.

    Product categories
    Carbon-, aramid- and glass-fiber prepregsFast-cure, clear, flame-retardant, cryogenic and medium/high-Tg epoxy prepregsTooling prepreg and high-performance film adhesive
  15. Zhejiang Dasheng Mould Plastics Co., Ltd. logo
    Zhejiang Dasheng Mould Plastics Co., Ltd.
    Huangyan, Taizhou, Zhejiang, China
    Process
    DFM, Moldflow and mold engineering
    Standard
    GB/T 19001-2016 / ISO 9001:2015 — Beijing Head International Certification certificate 04624Q14104R2M; mold design, development and manufacture; issued 2024-08-02, expires 2027-08-01; company-hosted image, live status unverified
    MOQ
    Not publicly listed
    Lead time
    Not publicly listed

    Zhejiang Dasheng Mould Plastics Co., Ltd. is a mainland-China tooling company in Huangyan, Taizhou, Zhejiang. Its current Chinese and English websites say the business has supported automotive and industrial customers since 2001 with thermoplastic, thermoset and advanced-composite tooling, including development capability for SMC, BMC, GMT, LFT-D and RTM processes. China Composites Expo lists the exhibitor as DASHENG MOULD and describes a Taizhou headquarters, medium-to-large automotive and structural molds, thermoset and thermoplastic tooling, and business across Europe, the Americas and Asia. The exhibitor wording, current Chinese and English legal names, No. 333 Jinchuan Road address, telephone, info@dsmould.com email, dsmould.com domain and unified social-credit code printed on company-hosted certificate images are deduplicated to this one mainland entity. Published Changxing and Xuzhou bases and the Shanghai sales branch are treated as operating locations rather than duplicate suppliers. Mexico, Dubai and Italy service points are not presented as the legal subject of this China profile, and unrelated similarly named mold companies are excluded.

    Product categories
    Composite compression molds for SMC, BMC, GMT, LFT-D and RTMCompression tooling and parts for carbon- and glass-fiber advanced materialsAutomotive interior, exterior, bumper, grille, instrument-panel and lamp molds
  16. Sinauva Composites Co., Ltd. logo
    Sinauva Composites Co., Ltd.
    Fengtai, Beijing, China
    Process
    Fiberglass-composite product development, manufacturing and export
    Standard
    ISO 9001
    MOQ
    Not publicly listed
    Lead time
    Not publicly listed

    Sinauva Composites Co., Ltd. presents itself as a Beijing-based developer, manufacturer and exporter of fiberglass-composite panels, structural foam cores, reinforcement materials and finished FRP products. Its official catalog spans sandwich panels and FRP skins; rovings, mats and multiaxial or advanced fabrics; pultruded profiles; grating; pipe fittings; and custom composite parts. The company also states that it works with associated factories to broaden the range of related fiberglass products available to buyers.

    Product categories
    FRP sandwich panels, fiberglass skins, and structural foam and honeycomb coresFiberglass roving, chopped strand, continuous filament, RTM, needle and stitched matsUnidirectional, biaxial, triaxial, quadraxial and multiaxial fiberglass fabrics
  17. Process
    Autoclave molding
    Standard
    AS9100
    MOQ
    Not publicly listed
    Lead time
    Not publicly listed

    Composite materials enterprise under AVIC (Aviation Industry Corporation of China). Aerospace structural parts, advanced prepregs, and honeycomb core products serving Chinese commercial and defense aviation programs.

    Product categories
    Aerospace composite structural partsPrepregsHoneycomb cores
    WebsiteNot publicly listed
  18. Process
    RTM
    Standard
    IRIS
    MOQ
    Not publicly listed
    Lead time
    Not publicly listed

    Related to 600031. High-speed rail and metro vehicle body composite parts.

    Product categories
    High-speed rail vehicle body composite partsMetro componentsmanufacturer
    WebsiteNot publicly listed
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