Wittenburg Group

What Wittenburg Group does

Wittenburg Group is a privately held, family-owned specialty polymer compounder founded in 1902 in Amsterdam and now headquartered in Zeewolde, Netherlands, with full ownership held by the Traa family since 1994. The group operates through three wholly owned subsidiaries — Wittenburg BV (medical TPE compounds under the Cawiton® brand, Zeewolde), Witcom Engineering Plastics BV (engineering plastics for automotive, transportation, aviation, E&E, industrial and consumer markets, Etten-Leur), and Xunfeng Specialty Plastics (Asia-Pacific manufacturing, Zhuhai, established 2012) — producing customized thermoplastic elastomer and engineering plastic compounds from over 30 base resins (PA66, PBT, PEEK, PEI, PPS, POM, PC, ABS, PP, PE) with specialized properties including radar absorption, thermal/electrical conductivity, PFAS-free lubrication, metal/X-ray detectability, flame retardancy, and biocompatibility.

The company solves polymer formulation challenges in highly regulated industries (medical devices, pharmaceutical packaging, food and potable water contact, automotive sensors) where standard compounds fail regulatory or performance requirements. Its core product franchises include the Cawiton® TPE portfolio (CN high-performance technical grades, SN standard technical grades, MT medical grades, and SM/SF/ST sustainable grades with ISCC PLUS certified content up to 51%) and Witcom engineering plastics (PA66, PBT, PEEK, PEI, PPS grades for gears, bearings, and tribological applications). Notable technical capabilities include over 8 pilot lines with extrusion, co-extrusion, sheet/blown film, and injection moulding for customer sample development, in-house analytical laboratories, and a pioneering role in radar-absorbing compounds introduced in 2008 and now used in most current cars.

Wittenburg generates revenue through direct sales of custom-engineered polymer compounds and toll-manufacturing services for medical compound customers, supplemented by channel partners (notably Chase Plastics for Witcom radar grades in NAFTA). The business operates on a project-based, specification-driven model with technical sales representatives engaging customers for compound co-development rather than commodity distribution. Revenue figures are not publicly disclosed; the company carries ISO 13485 (medical), ISO 9001 (quality), ISO 14001 (environmental), and ISO 10993 (biocompatibility) certifications across its production locations, plus regulatory compliance with FDA, EU MDR, German KTW, UK WRAS, French ACS, REACH, and RoHS frameworks, and has received Ecovadis Silver/Bronze medals, EFQM 3-Star recognition, and ISCC PLUS certification for sustainability performance.

Name

Wittenburg Group

Legal name

B.V. Rubberfabriek Wittenburg

Website

https://wittenburggroup.com

Company type

Private

Founded year

1902

Operating status

Operating

Headcount range

101–250 employees

Short description

Wittenburg Group is a family-owned Dutch specialty polymer compounder (founded 1902) operating three subsidiaries that design custom thermoplastic elastomer and engineering plastic compounds for medical devices, automotive sensors, and regulated industrial markets across Europe and Asia-Pacific.

Ownership category

akta.pro rank

Product category

Specialty Polymer Compounding

NAICS

Resin and Synthetic Rubber Manufacturing (32521), Resin, Synthetic Rubber, and Artificial and Synthetic Fibers and Filaments Manufacturing (3252)

SIC

Plastic Materials, Synth Resins & Nonvulcan Elastomers (2821), Plastic Material, Synth Resin/Rubber, Cellulos (No Glass) (2820)

akta.pro primary industry

Polymer Compounds & Masterbatches (Compounding, Color/Fill/Additive Concentrates) (IMAEANAJ)

akta.pro secondary industries

Medical & Food-Contact Specialty Compounds (IMANABAK), Thermoplastic Elastomer (TPE/TPU/TPV) Compounds (IMANABAC), Thermoplastic Elastomer (TPE/TPV) Compounding (IMANAJAC)

Keywords

• Polymer compounding services
• Thermoplastic elastomer compounds
• Engineering plastics manufacturing
• Medical grade polymers
• Custom polymer compounds

Headquarters

HQ city

Zeewolde

HQ country

Netherlands

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Custom Polymer Compound Sales: Design and manufacture of customised polymer compound solutions including thermoplastic elastomers (TPE) and speciality engineering plastics compounds sold directly to customers in regulated industries.

Go-to-market motion2 records

Distribution channels2 records

Marketing channels3 records

Core offering

The Wittenburg Group designs and manufactures customised polymer compound solutions, primarily thermoplastic elastomers (TPE) under the Cawiton® brand and specialty engineering plastics compounds through Witcom, for medical devices, pharmaceutical packaging, automotive, food/drinking water contact, and industrial applications. Production takes place at three ISO-certified sites in the Netherlands and China, with pilot lines for development, in-house analytical laboratories, and toll-manufacturing services for medical compound customers.

Product overview

The Wittenburg Group is a polymer compound manufacturer operating through three subsidiaries: Wittenburg BV (medical TPE compounds under the Cawiton® brand), Witcom Engineering Plastics (specialty engineering plastic compounds), and Xunfeng Specialty Plastics (serving the Asia-Pacific market). The product portfolio is organized around the Cawiton® TPE product lines (CN, SN, MT, SM/SF/ST series for technical, medical, and sustainable applications) and Witcom engineering plastics (PA66, PBT, PEEK, PEI, PPS compounds for gears, bearings, and specialized applications). The company also offers specialized compound categories including radar absorbing materials, PFAS-free lubricated compounds, conductive compounds, reinforced plastics, potable water compounds, detectable compounds, EMI/RFI shielding, X-ray shielding, 3D printing materials, flame retardant compounds, and toll manufacturing services.

Differentiator

Problem solved

Functional benefit

Brands

• Cawiton®: Brand name for Wittenburg's polymer compound solutions including TPE grades (CN series for high performance technical, SN series for standard technical, MT series for standard medical, SM/SF/ST series for sustainable)

Products and services

• Cawiton® CN Series (High-Performance Technical TPE Grades) High-performance technical TPE grades with hardness from 10 to 90 Shore A, offering excellent compression set, UV protection, heat ageing resistance, and easy mould ejection, used for sealing, outdoor, and technical components.
• Cawiton® SN Series (Standard Technical TPE Grades) Standard technical TPE grades in hardnesses 10 to 90 Shore A in natural light grey with easy colourability, suitable for injection moulding, extrusion of tubing/profiles, and cast film.
• Cawiton® MT Series (Standard Medical TPE Grades) Standard medical TPE grades with hardness 10 to 90 Shore A, translucent and biocompatibility-tested per ISO 10993 for cytotoxicity, irritation, and sensitisation, designed for medical devices and pharmaceutical packaging.
• Cawiton® SM/SF/ST Series (Sustainable TPE Grades) Sustainable TPE compounds including SM (biobased, ISCC PLUS certified up to 51%), SF (circular content), and ST (post-consumer recyclates) series in 40–80 Shore A hardness, suitable for medical and food-contact applications.
• Witcom Engineering Plastics Compounds (PA66, PBT, PEEK, PEI, PPS, POM) Customised engineering plastics compounds based on PA66, PBT, PEEK, PEI, PPS, POM and other base resins, designed for gears, bearings, sliding components, and demanding mechanical/tribological applications in automotive, transportation, aviation, electrical/electronics, industrial, medical, and consumer markets.
• Radar Absorbing Materials Customised radar-absorbing thermoplastic compounds based on PA6, PP, PBT, PC and TPE polymers for automotive radar sensor systems including parking aid, collision warning, and adaptive cruise control applications.
• Tolling of Medical Compounds Toll-manufacturing services for TPE and engineering plastic compounds for medical devices and pharmaceutical packaging under ISO 13485, where customers own the compound formulations and Wittenburg produces them to specification.
• Pre-coloured Polymer Compounds for Medical Application Pre-coloured compounds for medical applications including TPE-S, TPE-E, TPE-U and polyolefins (PP, PE, PBT, PC/ABS, ABS, POM, PA/ABS up to PEEK), produced under ISO 13485 for medical device and pharmaceutical packaging customers.
• API Compounds Polymer compounds containing Active Pharmaceutical Ingredients (APIs) or Active Ingredients (AI) for tissue repair, pharmaceutical delivery, and medical human contact applications requiring stringent regulations.
• 3D Printing Materials (FDM) Speciality compounds for 3D printing FDM technology, including carbon-fibre-reinforced materials (XT-CF20) and metal-filled compounds (Bronze, Copper, Brass, SteelFill) improving polymers on strength, stiffness, and dimensional stability.
• Aliphatic Polyketone Compounds Custom-made compounds based on aliphatic polyketone resins, including reinforced grades with glass, carbon or aramid fibres, tribological and lubricated grades, and halogen-free flame retardant compounds for industrial applications.
• Potable Water Compounds Engineering plastics compounds certified for drinking water contact applications, compliant with French ACS, German KTW (W270), UK WRAS, and EU regulations for safe water applications.
• Metal/X-ray Detectable Compounds Metal detectable, X-ray detectable, and dual metal/X-ray detectable grades for food manufacturing equipment to prevent contamination of final products, applicable to scrapers, buckets, scoops, and utensils.
• PFAS-free Lubricated Compounds PTFE/PFAS-free lubricated materials for improved friction and wear properties based on different polymer types, applied in conveyor belts, valve components, and other friction-critical applications.
• Thermally Conductive Compounds Thermally conductive thermoplastics with conductivity 10–50 times higher than standard polymers, enabling heat dissipation and metal replacement in heat sinks and encapsulations.
• Electrically Conductive Compounds Compounds for electrostatic discharge and EMI protection with electrical properties from antistatic (10⁹–10¹¹ Ohm/sq) through static dissipative (10⁶–10⁹) to conductive (10²–10⁵) and EMI shielding (10¹–10⁴ Ohm/sq).
• EMI/RFI Shielding Compounds Thermoplastic polymers modified with conductive fillers (carbon fibres, stainless steel fibres, nickel coated carbon fibres, multi-wall carbon nanotubes) providing electromagnetic compatibility with volume resistivity of 10⁻² to 10¹ ohm·cm.
• X-ray Shielding Plastic Compounds X-ray shielding compounds using Tungsten and Ceramics additives in polymers including PP, TPE-S, PA, PBT, PPS, and PEEK for medical and industrial radiation shielding applications.
• Reinforced Plastics Compounds Thermoplastic polymers modified with glass or carbon fibres up to 60% by weight, offering tensile strengths >300 MPa, tensile moduli exceeding 30 GPa, superior fatigue endurance, and creep resistance.
• Flame Retardant Compounds Flame retardant thermoplastics using halogen-free, chlorinated or brominated additives, rated V-0, V-1, or V-2 per UL94 standard, combinable with electrical/thermal conductivity and reinforcement.
• Infrared Transparent Compounds IR transmitting materials (PC-IR Black, PMMA-IR Transparent Red) that block visible light while allowing infrared light (starting from ~750 nm) to pass through, used for IR remote control windows and CCD video camera hiding.
• Low Wear and Friction Materials Tribologically optimised thermoplastics modified with lubricants such as PTFE, graphite, MoS2, silicone oil, and aramid for bearings, slides, gears, and other moving parts in automotive, industrial, and medical markets.

Quantifiable outcome

• Radar absorbing materials currently in use in most current cars
• +1 more outcomes

Named customers1 record

Segments3 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• Chase PlasticscoreChannel Partner/ Reseller/ DistributorChase Plastics is the appreciated distributor of Witcom radar grades in the NAFTA market. They offer customers in NAFTA local technical and commercial support and availability of local stocks for the Witcom radar grades, securing the highest service level, required supply flexibility and supply security.

Scale indicators4 records

Recent moves12 records

Expansion highlights6 records

Broad incumbents

• Celanese Corporation: Large specialty materials company producing engineered polymers (POM, LCP, PBT, PA) with compounding capabilities and a strong automotive/electronics presence — a broader incumbent against which Witcom's specialty engineering compounds compete.
• SABIC: Global petrochemicals and specialty resins major with engineered thermoplastics, compounded grades and circular-content offerings — overlapping customer base in automotive and industrial compound applications.
• DuPont de Nemours: Specialty materials company with engineering polymers (PA, PBT, PEEK-adjacent chemistries) for automotive, electronics and healthcare — competes with Witcom in high-performance engineering compounds.
• Asahi Kasei Corporation: Diversified Japanese materials company producing engineering plastics, specialty elastomers and performance compounds for automotive and electronics, including radar-related and electromagnetic materials — competes broadly with Witcom's specialty compounds.
• BASF SE: Global chemical major with a substantial performance materials and specialty compounds franchise, including polyamides, PBT and TPEs for automotive and industrial customers — overlapping portfolio to Witcom at much larger scale.

Direct peers

• RTP Company: Global custom compounder of engineered thermoplastics and TPEs serving automotive, medical, electronics and industrial markets with a broad portfolio of specialty grades — directly comparable to Witcom's and Wittenburg BV's custom compounding model.
• HEXPOL TPE: TPE-focused division of HEXPOL AB producing custom TPE compounds for industrial, consumer and medical applications — competes in the same regulated TPE compound niche as Wittenburg.
• Avient (formerly PolyOne): Specialty engineered materials company with a large specialty colorants and additives compounding franchise serving healthcare, automotive and electronics — competes head-to-head with Wittenburg in custom specialty compounds.
• Teknor Apex: Privately held specialty compounder of TPEs, flexible vinyl, and engineering thermoplastics with deep medical-device and regulatory expertise — a closely comparable business model and customer mix to Wittenburg BV's Cawiton franchise.
• KRAIBURG TPE: Specialty TPE compounder with automotive, medical and consumer-goods focus, offering custom-engineered TPE compounds — a direct functional analogue to the Cawiton CN/SN/MT product families.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/WittenburgBV

Compliance17 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Wittenburg Group