Technology

3D printing is no longer a new invention. It has become an important part of modern manufacturing. Companies use it for many purposes, from making test samples (prototypes) to producing finished industrial products. Among the different materials used in 3D printing, polyurethane has gained special attention because of its unique abilities. So, why is polyurethane foam, especially the two-part spray type, becoming a popular choice for 3D printing? And what makes it different from other materials? These are the topics discussed in this article.

When designing public spaces such as parks, children’s playgrounds, walking paths, or sports areas, the choice of flooring material is very important for safety, durability, and appearance. One interesting solution is a surface made from small pieces of rubber (granules) combined with polyurethane binder. These surfaces are popular because they absorb impact, resist weather conditions, and can be made in many different colors and designs. In this article, we explain how polyurethane (PU) adhesive is used in these floors, its benefits, common applications, and tips for choosing the right adhesive for your project.

Climbing holds are essential elements in climbing walls. They allow the climber to hold on to the climbing wall. Different materials are used to manufacture climbing holds. As a result, determining the right material for your holds is nearly as important as choosing the correct sizes and shapes for your wall. In this paper, the issue is going to be discussed.

Polyurea coatings cure quickly, offering waterproofing, flexibility, and durability. They adhere to various surfaces and resist chemicals, temperatures, and abrasion. Used in automotive, pipelines, defense, healthcare, and construction, they protect against damage and deterioration.

One-component polyurethane foam (OCF) is a pre-mixed, self-expanding foam used for insulation and sealing in construction. It comes in cans, expands upon application, and cures within hours. OCF is adhesive, weather-resistant, and requires safety precautions due to its flammability.

Recycling polyurethane (PU) involves thermal methods (incineration and pyrolysis), chemical methods (hydrolysis, alcoholysis, glycolysis), and mechanical methods (crushing and repurposing). Thermal methods can release toxins, chemical methods can be complex, and mechanical recycling is cost-effective but yields lower-quality materials.

Hydroponic polyurethane foam offers a sustainable soil alternative for efficient plant growth and resource use. With high water absorption and reusability, it supports long-term cultivation despite challenges with non-renewable materials. Future research aims to enhance its environmental benefits and food security contributions.

Rigid polyurethane foams (RPUFs) are used in floral design for their high water absorption and open-cell structure. Floral foams, available as wet and dry types, facilitate flower arrangement and vary in density. The synthesis process enhances water retention and balances hydrophilicity, though some foams may have limited strength for certain applications.

Polyurethane foam cosmetic sponges, or egg sponges, are ideal for makeup application due to their softness, bounce, and latex-free composition. They are available in polyether and polyester types, with polyether-based sponges offering better flexibility and durability. Proper cleaning is essential to avoid bacterial growth.