Catégorie : Services & Research for the plastics and rubber industries

Stéarinerie Dubois, a French family-owned company recognized worldwide for its expertise in the creation and production of fatty esters since 1820. Today, it is positioned as the leader in Europe.

Operating with the principles of the « green chemistry », it offers a very wide range of lipophilic products used in four major business sectors :

Cosmetic / Health / Food / Functional Specialties

Our biobased or partially biosourced esters, dedicated to industry, are solutions for rubber, PVC-plastisol and biopolymer formulations. These additives can plasticize, reduce viscosity, aids processing and demolding.

In addition, with LCA we are able to support your specifications in highly demanding sectors such as aeronautics, defense and automotive…

Thanks to our expertise in oleochemistry, we are subcontracting partners for esterification, oil treatment and wax pelletizing with a melting point from 40 to 80°C.

Esters for Polymers : We offer a wide range of plasticizers, lubricants and processing aids for thermoplastic polymers.

Our oils improve the flexibility and viscous transition temperature, while enhancing the low-temperature performance of different polymer types, such as : flexible PVC, PBT, PET and many others.

Esters for biopolymers: incorporating plasticizing esters into bioplastics improves the softness, flexibility and cold resistance of these materials, which are too rigid and brittle in their pure state.

our esters are compatible with a wide range of biopolymers such as PLA (polylactic acid), PHA (polyhydroxyalkanoates), PBS (polybutylene succinate) and their blends.

without altering the chemical structure of the biopolymer, our oils improve physical properties while remaining biodegradable.

Esters for elastomers: esters are indispensable in rubber formulations. Their purpose is to modify mechanical properties, improve rubber transformation processes and tailor elastomer usage properties.

They can be used for a variety of functions (plasticizers, process oils and release agents)

OUR ECO-RESPONSIBLE COMMITMENTS

Committed to CSR and concerned about our carbon footprint, we are now able to provide you with LCAs for each product and packaging.

• EcoVadis assessment of our sustainability performance. Gold level awarded
• Annual report on sustainable development: www.stearinerie-dubois.com/?s=rapport
• RSPO certification
• ISO 9001:2015 certification
• ISO 14001:2015 certification
• FDA registration
• REACH position
  • Compliance EUDR

• Developed an alternative to DOS Dioctyl sebacate, which we offer as a plasticizer for polar rubbers, and which is 100% biosourced and biodegradable.
• Market an alternative to technical paraffinic oils used in polar elastomer formulations : SBR, AEM, AEVM, CR, ACM, NBR and HNBR.
• study and compare the behavior of several partially or totally biobased esters to propose different alternatives to conventional plasticizers on the market today.

Polytechs is an Independent French producer of specialty compounds & masterbatches since 1980. The company has a production capacity of more than 42 000T split between 18 industrial & pilot lines – working in both Extrusion (twin screws ; Co-kneaders) and Compaction activities. More than 160 people work there on 24/7 basis under the standard of ISO 9001, ISO 14001 and ISO 45001. Polytechs is as well proudly recognized by the Ecovadis label as Silver medal and by the World Customs Organization as Authorized Economic Operator (AEO). As an active member of EuMBC and ACFB, Polytechs helps shape the future of functional and circular materials.

Polytechs does generate a turnover of 35 millions Euros across two activities – the first one is its Toll Compounding services, working for the major petrochemical brands in Europe as well as the top players in polymer compounding and plastic conversion markets. Its 45 years of compounding experience make Polytechs THE most reliable partner you need for technical developments such as liquid injection handling ; reactive extrusion ; sensitive materials handling ; etc.

The second activity is the production and selling of its own product brands – worldwidely known such as PW® cling masterbatch or Clean Xpress® purging compounds – but as well as its peroxide masterbatches, PFAS and PFAS-Free PPA masterbatches or its XW blowing agents. These brands deliver surface modification and productivity solutions to mainly the flexible packaging industry, the wire & cable actors and the pipe & tubes market. 65% of the sales are made outside France.

In response to the recent regulatory directives that drive a requirement of a minimum recycled content and increased recyclability of plastic packaging, our company positions itself as a strategic partner in the industry’s ecological transition – by developing the Re-PTX range, masterbatches that turn recycling challenges into opportunities (rheology modification ; Compatibilisation ; Residual Molecule Migration Control ; Mechanical properties Improvement) and the Bio-PTX range, bio-based biodegradable masterbatches for the bioplastic industry.

PW® Cling masterbatch is a Polyisobutylene (PIB) masterbatch used in LLDPE stretch films for cling properties as main used. It does provide side-benefits such as cold flow or moisture barrier. PW® range does exist for more than 30 years as market Leader of Cling masterbatch solutions (PW 60, PW 70 or PW S) servicing the end markets of Silage Stretch Films ; Pallet / Industrial Stretch films; Food Stretch films.

Clean Xpress® is a hybrid purging compound range in pellet form dedicated to extrusion applications – both compounding & conversion markets such as blown & cast films; wires & cables ; Pipes & Tubes ; Sheets. Its market awareness in Europe (thanks to partnerships with leaders in machinery) combined with its excellent technical performances led Clean Xpress to become one of the TOP 3 purging compounds range in this continent. Clean Xpress can clean most of the TPs, TPEs & Rubbers.

Flow Xpress® is a product range dealing with productivity topics. It is Split into two product ranges :

Processing Aid Masterbatches – including high performance fluoro-based PPAs for PP or High T° PE as well as Food-contact PFAS-free PPA masterbatches.

Peroxide Masterbatches – used for viscosity modification (MFI increase) of Polypropyplene in GMT Process, Non Woven PP fiber, PP Compounding and PP inection molding,  or for Crosslinking and grafting applications for Polyethylene  such as PE-MaH ; PE-Silane.

OUR ECO-RESPONSIBLE COMMITMENTS

Committed to circular and responsible plastics, Polytechs is ISO 14001 & ISO 45001 certified, Ecovadis Silver-rated, and holds the “Granulé Plastique Industriel” label. We develop innovative solutions such as Re-PTX® (for recyclability), Bio-PTX® (bio-based & biodegradable), and PFAS-free masterbatches. As an active member of EuMBC and ACFB, we contribute to a safer, more sustainable and competitive plastics industry—driven by technical excellence and environmental responsibility.

At Polytechs, innovation serves circularity. With our Re-PTX® range, we turn recycling challenges into performance: viscosity control, surface additive reduction, compatibilisation, and mechanical reinforcement of recycled polyolefins. Our BioPTX® platform accelerates the transition to compostable and bio-based plastics, with solutions like foam, purge, and tackifier masterbatches. Supported by national R&D programs, we scale up tomorrow’s sustainable functionalities—available now.

Now a proud member of Bemis Associates, Protechnic is a French industrial company based in Cernay, specializing in the development, manufacturing, and marketing of thermoplastic hotmelt adhesives and decorative films. With over 50 years of experience and a strong reputation for innovation and quality, Protechnic serves diverse industries worldwide. Its focus on in-house R&D and sustainable development makes it a trusted partner for manufacturers seeking high-performance and eco-friendly bonding and decorative solutions.

Thermoplastic Hotmelt Adhesives
Protechnic’s solvent-free hotmelt adhesives bond various materials through heat and pressure, widely used in multilayer assemblies. The products include:

• Web adhesives: Lightweight and breathable fibrous adhesives.
• Net adhesives: Mesh-like adhesives offering strong bonding with airflow.
• Film adhesives: Multilayer films for precise and durable bonding.

These adhesives are customizable, fast-acting, and resistant to temperature and humidity, making them ideal for automotive, textiles, footwear, medical, filtration, furniture, and bedding applications.

Decorative and Protective Films
Protechnic also produces decorative films that combine aesthetics with durability. Available in finishes like wood grain, metal, and stone, these films offer UV protection, scratch resistance, and thermoformability. They are used in transportation interiors, furniture, flooring, electronics, and interior design. Protechnic provides full in-house design and prototyping to turn creative concepts into high-quality, production-ready films.

Global Presence and Capabilities
Though proudly French, Protechnic serves customers worldwide, supported by a global distributor network, multilingual technical teams, and flexible manufacturing for both large and small batches. Committed to responsive service, Protechnic combines decades of experience with innovation and sustainability, partnering with clients to build the products of tomorrow.

Web adhesive  

Web adhesive is a nonwoven, thermoplastic bonding material formed into a lightweight, fibrous structure resembling a fabric or mesh. It is designed to provide a uniform, breathable, and flexible adhesive layer between materials. When heated, the web melts and activates, creating a strong bond between substrates without the use of solvents or liquid glues.

Key Features:

• Solvent-free and environmentally friendly
• Excellent breathability, ideal for textiles and multilayer materials
• Uniform adhesive distribution for consistent bonding performance
• Flexible and soft, suitable for delicate or stretchable substrates
• Customizable melting points and adhesion strengths

Applications:

• Textiles & Apparel – Bonding technical fabrics, linings, and stretch garments
• Automotive – Interior laminations, acoustic insulation layers
• Footwear – Assembly of uppers, reinforcements, and linings
• Medical – Joining of nonwoven materials in masks, gowns, and barrier fabrics
• Filtration – Layer bonding in air and liquid filters
• Furniture & Bedding – Foam-to-fabric lamination in seats, cushions, and panels

Adhesive webs are valued for their ease of use, clean processing, and compatibility with high-speed industrial lamination processes. They are available in different basis weights, widths, and thermoplastic chemistries (such as EVA, TPU, PA, PES) to suit various application requirements.

Film adhesive

Film adhesive is a solid, thermoplastic bonding film designed to create strong, uniform bonds between a wide range of materials. Unlike web or net adhesives, film adhesives are continuous, non-porous layers, offering precise thickness control, improved durability, and enhanced resistance properties. They activate upon heating, allowing clean, efficient bonding without the use of liquid adhesives or solvents.

Key Features:

• Solvent-free: Clean and environmentally responsible bonding
• Precise and uniform thickness: Ensures consistent adhesive performance
• High bond strength: Excellent adhesion to textiles, foams, plastics, and composites
• Thermal and chemical resistance: Ideal for demanding technical applications
• Customizable formulations: Available with varied melting points, flexibility, and strength

Applications:

• Automotive – Structural lamination, acoustic panels, seat and trim bonding
• Textile & Apparel – Bonding of multilayer garments and technical fabrics
• Footwear – Toe puff and counter bonding, upper lamination
• Medical – Assembly of medical devices and barrier materials
• Furniture & Bedding – Foam and fabric lamination for cushions, headboards, and panels
• Consumer Electronics – Structural bonding and insulation layers

Film adhesives are well-suited to automated, high-speed production and can be easily die-cut or pre-shaped for specific applications. Protechnic offers film adhesives in various thermoplastic chemistries such as TPU, EVA, PES, and PA, designed to meet functional, aesthetic, and regulatory requirements.

Decorative film

Decorative films are specially engineered thin layers designed to enhance the aesthetic appeal and functional protection of various surfaces. These films combine visual design elements—such as color, texture, and pattern—with durable performance characteristics, making them ideal for applications in interior design, furniture, transportation, and consumer products.

Key Features:

• Wide range of finishes: Including wood grain, stone, brushed metal, abstract patterns, and solid colors
• Protective properties: UV resistance, scratch and chemical protection, anti-fingerprint coatings
• Thermoformability: Films can be shaped or molded to complex 3D surfaces without losing their visual or protective qualities
• Printability and customization: Supports logos, textures, and special visual effects to match brand identity and design requirements
• Durability: Resistant to wear, fading, and environmental stresses, ensuring long-lasting beauty and function

Applications:

• Transportation: Interior panels, dashboards, door trims, and flooring in cars, buses, trains, and aircraft
• Interior Architecture: Wall coverings, ceiling panels, partitions, and decorative surfaces
• Furniture: Laminated surfaces for cabinetry, tables, desks, and shelving units
• Flooring: Decorative and protective layers integrated into vinyl and laminate floors
• Consumer Electronics & Appliances: Surface finishes for devices, control panels, and household appliances

With in-house design and prototyping capabilities, Protechnic works closely with customers to transform creative concepts into production-ready decorative films that meet both aesthetic and technical demands. This ensures consistent quality and performance from initial idea to final product.

OUR ECO-RESPONSIBLE COMMITMENTS

Protechnic is deeply committed to sustainable manufacturing and eco-responsible product development. The company actively supports circular economy principles by:

• Using solvent-free technologies that reduce VOC emissions.
• Offering lightweight, recyclable adhesive formats.
• Designing energy-efficient processes that reduce carbon footprint.
• Promoting durable solutions that extend product life and minimize waste.

The adhesives are produced without harmful solvents, and many decorative films are available with protective coatings that reduce cleaning needs and surface wear, contributing to the longevity of end products.

Protechnic also monitors regulatory compliance, ensuring that all products meet current international standards including REACH, RoHS, and industry-specific certifications

The company operates a dedicated R&D laboratory , staffed with experienced chemists, material scientists, and application engineers. This team works directly with customers to understand their unique challenges and develop tailor-made solutions.

R&D Capabilities Include:

• New product formulation based on resin chemistry and substrate compatibility.
• Pilot line testing to validate process parameters before full-scale production.
• Performance analysis: Peel strength, shear strength, temperature resistance, aging, and chemical resistance.
• Innovation in sustainable materials, including recyclable and bio-based resins.
• Application development support for customers integrating adhesives and films into complex manufacturing processes.

This co-development approach ensures that customers receive optimized products that meet both technical and regulatory requirements, with efficient integration into their production lines.