Polyurethane: A Brief Guide to Shoe Sole Production

Il poliuretano nella produzione di suole per calzature
Il poliuretano nella produzione di suole per calzature

Polyurethane: A Brief Guide to Shoe Sole Production

Let’s discover the types, distinctive qualities and application sectors of polyurethane, with a focus on the production of shoe soles and the advantages of using polyurethane in the footwear sector

Polyurethane Characteristics and Applications

Polyurethane (PU) is a polymer that encompasses a broad class of materials used in multiple industrial sectors. From soft, low-density foams to compact elastomers, PU offers a range of shapes that meet specific needs, with applications ranging from furniture to automotive.

PU is therefore a versatile player in the world of materials with high physical-chemical performances. Its elasticity and resistance make it ideal for counteracting atmospheric, chemical and biological agents, remaining resilient even under stress.

There are various types of polyurethane on the market. For example, rigid structural polyurethane foams are used in furniture and boating; rigid polyurethane foams are lightweight foams used for thermal insulation; Semi-rigid polyurethane foams are used in the automotive industry for components such as steering wheels and dashboards; flexible polyurethane foams, on the other hand, are foams used in the automotive industry and in the production of mattresses and toys. Compact polyurethane foams and elastomers are suitable for the production of shoe soles, also used for yarns, sporting goods and waterproofing. Paints and adhesives, on the other hand, are used for applications in the building and furnishing industries.

Advantages of polyurethane in the production of shoe soles

Good footwear should be comfortable and durable. Polyurethane meets these needs.
The polyurethane used in the production of shoe soles and insoles stands out for its softness and durability, as well as for its versatility, as it can be used in the production of different types of soles, from safety to fashion. The final result is a product with excellent physical-chemical characteristics such as:
  • resistance to exogenous agents (chemical, atmospheric and biological);
  • impermeability water;
  • lightness;
  • softness;
  • dimensional stability;
  • mechanical resistance, abrasion and high temperatures;
  • durability.
If you are considering using polyurethane in your footwear production, contact us for a personalized consultation.

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    A Comprehensive Guide to Polyurethane for Footwear Soles

    suola stampata in PU poliuretano
    suola stampata in PU poliuretano

    A Comprehensive Guide to Polyurethane for Footwear Soles

    Polyurethane (PU) is a versatile material acclaimed for its outstanding physical and chemical attributes, extensively utilized across industries. This in-depth exploration delves into various PU forms, spotlighting its unique advantages in footwear industry.

    Polyurethane Properties and Applications

    Polyurethane (PU) emerges as a key player, renowned for its superior physical and chemical prowess. Its elasticity and resilience make it a prime choice, resilient even in challenging environments and stress conditions.

    • Structural Rigid Expanded Polyurethanes: deployed in furniture and marine sectors for advanced structural capabilities.
    • Rigid Expanded Polyurethanes: lightweight foams catering to thermal insulation needs in construction and industrial and domestic refrigeration.
    • Semi-Rigid Expanded Polyurethanes: applied in automotive settings for components like steering wheels and dashboards.
    • Flexible Expanded Polyurethanes: versatile foams applicable in mattresses, toys and automotive applications.
    • Compact Expanded Polyurethanes and Elastomers: materials for footwear soles, yarns, sports articles and waterproofing.
    • Paints and Adhesives: diverse applications in construction and furniture.

    Polyurethane Advantages in Footwear Soles

    Polyurethane used in footwear sole production stands out for its softness and durability. Injected directly into the mold with isocyanate, polyol and specific additives, it offers:

    • Resilience to external elements
    • Waterproofing for prolonged wear
    • Lightweight construction
    • Supple texture for enhanced comfort
    • Dimensional stability amidst rigorous use
    • Mechanical strength, abrasion resistance and enduring high temperatures
    • Proven longevity, ensuring sustainable wear
    • Adaptable to custom coating applications
    • Versatility suited for safety, sports, and trendsetting fashion soles

    Considering the integration of polyurethane in your footwear production processes? Reach out for a personalized consultation.

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      DISCOVER THE DIFFERENCES BETWEEN TPU AND PU IN THE PRODUCTION OF FOOTWEAR SOLE

      suole stampate
      suole stampate in TPU e PU

      DISCOVER THE DIFFERENCES BETWEEN TPU AND PU IN THE PRODUCTION OF FOOTWEAR SOLE

      TPU and PU are two materials widely used in the footwear sector due to their high chemical and mechanical characteristics, but they have significant differences in properties and application. Let’s see what the characteristics and differences are.

      In the footwear industry, the choice of materials for the production of soles is a crucial aspect that affects the performance, comfort and durability of the shoe. Thermoplastic polyurethane (TPU) and polyurethane (PU) are among the most used materials: they share significant chemical and mechanical characteristics, as they belong to the same family, but they also have significant differences that influence the final result. This guide aims to help industry operators make informed decisions in the production of quality footwear soles.

      TPU: ROBUSTNESS, VERSATILITY AND RESISTANCE

      Thermoplastic polyurethane (TPU) is known for its excellent mechanical properties. Thanks to these characteristics, TPU is one of the best performing materials for the production of different types of footwear soles (sports, casual, elegant, accident prevention, healthcare), allowing the creation of products with high-level technical and aesthetic qualities.

      The main advantages of using TPU in the production of shoe soles are:

      1. High abrasion resistance: TPU soles are designed to last over time and are an ideal choice for shoes subject to mechanical stress or intensive use.
      2.  Flexibility: The TPU soles offer good flexibility even at low temperatures, ensuring comfort and functionality of the shoe.
      3. Chemical Resistance: TPU resists substances such as oils, greases and solvents well, which are common in many industrial or outdoor environments.
      4. Design Versatility: TPU can be molded into different shapes and hardnesses, allowing great freedom in outsole design.
      5. Unlimited style options: TPU gives the possibility of applying any type of color and finish (glossy, matt, metallic, glitter, pearlescent, etc.), and of painting.

      PU: COMFORT, LIGHTNESS AND DURABILITY

      Good footwear should be comfortable and durable. Polyurethane meets these needs. Used to make soles, midsoles and insoles, PU is characterized by a wide range of densities that allow customization of rebound and comfort. Furthermore, its resistance to chemical, atmospheric and biological agents, together with its impermeability to water and dimensional stability, make it a reliable option.

      The main advantages of using PU in the production of shoe soles are:

      1. Excellent Cushioning: PU offers the possibility of customizing the level of cushioning, making the fit comfortable and absorbing impacts during walking.
      2. Lightweight: PU allows for the production of lightweight soles for shoes that are comfortable to wear.
      3. Resistance to external agents: PU is known for its resistance to chemical, atmospheric and biological agents.
      4. Dimensional stability: PU soles maintain their technical performance over time.
      5. Economic factor: depending on the formulation, PU can be cheaper than TPU, an aspect to consider in large-scale production

      TPU OR PU?

      The choice between the use of TPU and PU in the footwear industry is a crucial decision that depends on the priorities of the brand and the specific needs of the product. Both of these materials offer a wide range of possibilities for creating high-quality soles. Understanding their differences is essential to creating footwear that meets the needs of the customer and the end consumer.

      If you would like to further explore the applications of TPU and PU in the production of shoe soles or need advice for your project, contact us. We’re here to answer your questions and help you create ideal footwear for your brand.

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        POR MARCHE FESR 2014/2020 – ASSE 1 – OS 1 – AZIONE 1.3 – INTERVENTO 1.3.1 “Promote corporate innovation processes and the use of new digital technologies” – “TECHNOLOGICAL AND DIGITAL TRANSITION OF PRODUCTION PROCESSES AND ORGANIZATION”

        POR MARCHE FESR 2014/2020 – ASSE 1 – OS 1 – AZIONE 1.3 – INTERVENTO 1.3.1 “Promote corporate innovation processes and the use of new digital technologies” – “TECHNOLOGICAL AND DIGITAL TRANSITION OF PRODUCTION PROCESSES AND ORGANIZATION”

        Introduction to the production cycle of two new anthropomorphic lines for carding and gluing soles aimed at promoting the technological transition of the company towards the Industry 4.0 paradigm. The objectives of the project are the automation, standardization and insourcing of the gluing and carding processes, with the aim of improving production efficiency and quality.

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        Pu.Ro. Wins the Best Value Award Marche 2024: Celebrating Innovation and Excellence

        December 12, 2024
        We are proud to announce that Pu.Ro. has been honored with the Best Value Award Marche 2024, recognizing our role
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        Why Keeping Molds in Optimal Condition Is Essential. In the injection molding industry for shoe sole production, the quality of
        Continua a leggere

        Send us a message







          Advantages of Thermoplastic Polyurethane (TPU) in Footwear Sole Production: A Comprehensive Guide

          Advantages of Thermoplastic Polyurethane (TPU) in Footwear Sole Production: A Comprehensive Guide

          If you’re in search of a versatile and high-performing material for footwear sole production, Thermoplastic Polyurethane (TPU) might be the ideal solution. In this guide, we will explore the numerous advantages that make TPU an outstanding choice for manufacturing various types of shoe sole, from athletic to elegant.

          1. High Technical and Aesthetic Performance

          TPU offers advanced technical features combined with a high-level aesthetic appeal. This combination makes it suitable for producing any type of footwear, ensuring both excellent performance and an eye-catching appearance.

          2. Multifunctional Resistance

          With excellent resistance to grip, abrasion, chemicals, atmospheric conditions and oils, TPU stands out for its durability. This multifunctional resistance is crucial in the footwear industry.

          3. Dimensional Stability and Hardness Customization

          Dimensional stability is a key aspect of TPU, ensuring that soles maintain their shape over time. Additionally, the ability to customize hardness provides added flexibility in footwear design.

          4. Excellent Flexibility and Diverse Color Option

          TPU’s outstanding flexibility translates to comfort for shoe wearers. Moreover, the wide range of available colors – glossy, matte, metallic, glittery, pearlescent, etc. – allows customization of shoe soles based on personal style and market demands.

          5. Custom Paint Finishes

          TPU offers the option of applying custom paint finishes, adding a distinctive touch to footwear soles. This creative choice allows for product differentiation in the market.

          6. Reduced Environmental Impact

          Its sustainability as a recyclable material or derived from renewable sources contributes to reducing the environmental impact of both production and the finished product.

          If you are planning a footwear project and would like more information on using TPU, feel free to contact us!

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