One of the most adaptable types of polymeric material, polyurethanes can be modified to fulfill the requirements of a wide variety of adhesive and sealant systems. While thermoplastic polyurethane (TPU) technology is ideal for numerous applications (such as transportation, furniture, footwear, and textiles) where it can demonstrate its excellent mechanical properties, adhesives based on polyurethane dispersion are most exclusively used in situations where strong adhesion to the substrate and great cohesion are required in order to guarantee long lasting bond stability. TPU technology is ideal for numerous applications (such as transportation, furniture, footwear, and textiles). Let's take a look at some of the most common parts of the applications for each of them.

Dashboards (foam to TPO/PVC, door panels (textile / wood / ABS), carpets, and headliners for the automotive industry, which is generally a 2K business. A good initial bond strength must be achieved under low pressure and/or at a low activation temperature in order to fulfill the requirements.

Kitchens (decorative PVC foil applied to wood or MDF-formed door panels) are included in the category of Furniture, which is generally referred to as 2K. It is essential to have a high tack and a long life.

When it comes to footwear, solvent-borne adhesive is more forgiving but also more expensive than polyurethane dispersions. The product must meet the following requirements: very high initial tack at low pressure and temperature; excellent resistance to water and plasticizer; and good adhesion to PVC, rubber, and leather.

In addition, applications for polyurethane dispersion adhesives are becoming more common in the food packaging industry. The following table provides an example of the starting formulation for a waterborne polyurethane that can be used as an adhesive for heat sealing. With the addition of isocyanate, Eva adhesive film has the potential to be formulated as either a thermoplastic or a thermosetting system.

Polyol Sulfonated polyester polyol, 0.65 hydroxyl equivalents (Rucoflex XS-5570-55, Ruco Polymer Corp.) 667.8 parts by weight Component Ingredients Polyol

Hexamethyl diisocyanate, equivalent to 0.8 hexamethylene isocyanate 54.9

Coating that is Waterborne Polyurethane and Heat Sealable4

1. The mixture of polyol and isocyanate was heated to 80 degrees Celsius for two and a half hours

2.  The NCO-terminated sulfonated polyurethane pre-polymers were dispersed in 1138g of deionized water once the isocyanate content reached approximately 2

3. 6%

4.  Before the dispersion, the temperature of the water was 40 degrees Celsius

5.  The final dispersion had a pH of 6

6. 5 when it was finished

Real Estate

Free of volatile organic compounds as well as other additives, such as solvents and catalysts.

Peel strength measured in g/cm

After aging PET/PP PET/Foil for a period of 24 hours

293

After the addition of 2% crosslinker* and after aging PET/PP PET/Foil for 24 hours, the peel strength is measured in g/cm.

192 hrs

260

The requirements for polyurethane dispersion adhesive for various common substrates and applications are outlined in the table below. The following characteristics of the adhesives eva adhesive film will be determined based on the application.

Mobility and adaptability

Chemical resistance and further considerations

Application Region of the Substrate Product

Flooring made of parquet

Wood coatings used in factories

Ceramics made from cork

Strong resistance to wear and tear

Resistance to chemicals and solvents at a high level

flooring made of uPVC and pPVC

Films and laminating materials

TV and audio component encasements

Strong adhesion even to the most challenging substrates

Resistance to scratches

Excellent compatibility with acrylic

Leather produced synthetically



Excellent levels of both flexibility and elasticity

Cost effective

Craft of Masonry

Coatings for buildings and structures

The Walls and the Tiles

Predominantly tough types to foster greater flexibility

Excellent compatibility with acrylic

The visual arts

Binders for pigments

Excellent adhesion as well as scuff resistance.

Excellent resistance to chemicals

The Dispersion of PolyurethaneApplications Requiring Adhesive5

TPUs are the ideal adhesives for use in a wide variety of markets, including the textile, transportation, furniture, and footwear industries, among others.

Carriage and conveyance

In order to satisfy the requirements outlined by the automotive industry, this market necessitates adhesives that not only have a good hot green strength but also an excellent final bond.

Because of the excellent results that can be achieved with adhesives based on TPU, these products are utilized in this industry for a wide variety of purposes, and they have been met with great success.

Adhesives made of TPU are utilized in the transportation sector. Thermoplastic polyurethanes are utilized in the transportation sector.

TPUs are raw materials that offer an increasing number of solutions to meet these demands, and their availability is growing.

Fabrics that can be heat sealed, including foam lamination and soft trim.

Home furnishings

TPU adhesives create a bond that is extremely strong to materials made of wood, such as MDF, as well as plastics, such as PVC.

The use of reactive hot melt adhesives is required in certain applications, such as profile wrapping, edge banding, and lamination. It is possible to improve the overall performance of these adhesives thanks to the incorporation of TPUs into the formulations.

Fabricated fabric

TPU hot melt adhesives, which come in a variety of melt and viscosity properties, are able to provide solutions for the majority of the laminating combinations of textile substrates.

adhesive made from merquinsaIn the textile industry, thermoplastic polyurethanes are put to use. The Use of Thermoplastic Polyurethanes in the Textile Industry

The primary application for TPU Hot Melts is in the production of heat-sealable fabrics, which can be obtained through coating processes such as scattering or dot-coating (powder or paste). The Oeko-Tex Class I standard can be met by TPU Hot Melts.

When it comes to manufacturing shoes, there is a large selection of different types of bondings. There are a number of moving parts, including the progression of technology, the required levels of performance, the design of the shoe, and most importantly, an extraordinary range of material options.