Bio-SAH™ 322Liquid
Polyurethane (PU) systems are widely used in the production of synthetic leather, also known as faux leather or PU leather. PU leather is a versatile and popular alternative to genuine leather, offering various advantages such as cost-effectiveness, durability, and a wide range of design possibilities. The PU system used in synthetic leather typically involves the combination of polyurethane components to achieve the desired properties in the final material.
Here are the key components and steps involved in a typical PU system for synthetic leather:
Polyurethane Resin:
The primary component of the PU system is a polyurethane resin. Polyurethane is a polymer composed of organic units joined by urethane links. It is known for its flexibility, abrasion resistance, and ability to mimic the look and feel of genuine leather.
Polyol:
Polyols are one of the main building blocks of polyurethane. They are hydroxyl-terminated compounds that react with isocyanates to form the polyurethane polymer. Different polyols with varying molecular weights and structures can be used to tailor the properties of the synthetic leather.
Isocyanate (Diisocyanate):
Isocyanates, such as toluene diisocyanate (TDI) or methylene diphenyl diisocyanate (MDI), react with polyols to form the polyurethane polymer. The choice of isocyanate can influence the flexibility, hardness, and other mechanical properties of the synthetic leather.
Crosslinkers and Chain Extenders:
These additives are used to control the molecular weight and crosslinking density of the polyurethane, affecting the final properties of the synthetic leather.
Stabilizers and Additives:
Stabilizers and additives may be included to enhance the stability, UV resistance, and other performance characteristics of the synthetic leather.
Solvent or Water-Based Systems:
The PU system can be formulated as a solvent-based or water-based system. Water-based PU systems are environmentally friendly and are becoming increasingly popular due to regulations and sustainability considerations.
Coating Process:
The PU system is typically applied as a coating onto a fabric substrate, creating a bonded layer that mimics the appearance and texture of genuine leather.
Embossing and Finishing:
After the PU coating is applied, the synthetic leather may undergo embossing to achieve textures resembling natural leather. Various finishing processes, such as dyeing, printing, or adding a protective topcoat, can be employed to enhance the aesthetic and functional properties.
The specific formulation of the PU system can vary based on the manufacturer's requirements and the desired characteristics of the synthetic leather. PU systems offer versatility, allowing for the production of a wide range of synthetic leather products used in upholstery, fashion, automotive interiors, and more
Polyurethane (PU) systems are widely used in the production of synthetic leather, also known as faux leather or PU leather. PU leather is a versatile and popular alternative to genuine leather, offering various advantages such as cost-effectiveness, durability, and a wide range of design possibilities. The PU system used in synthetic leather typically involves the combination of polyurethane components to achieve the desired properties in the final material.
Here are the key components and steps involved in a typical PU system for synthetic leather:
Polyurethane Resin:
The primary component of the PU system is a polyurethane resin. Polyurethane is a polymer composed of organic units joined by urethane links. It is known for its flexibility, abrasion resistance, and ability to mimic the look and feel of genuine leather.
Polyol:
Polyols are one of the main building blocks of polyurethane. They are hydroxyl-terminated compounds that react with isocyanates to form the polyurethane polymer. Different polyols with varying molecular weights and structures can be used to tailor the properties of the synthetic leather.
Isocyanate (Diisocyanate):
Isocyanates, such as toluene diisocyanate (TDI) or methylene diphenyl diisocyanate (MDI), react with polyols to form the polyurethane polymer. The choice of isocyanate can influence the flexibility, hardness, and other mechanical properties of the synthetic leather.
Crosslinkers and Chain Extenders:
These additives are used to control the molecular weight and crosslinking density of the polyurethane, affecting the final properties of the synthetic leather.
Stabilizers and Additives:
Stabilizers and additives may be included to enhance the stability, UV resistance, and other performance characteristics of the synthetic leather.
Solvent or Water-Based Systems:
The PU system can be formulated as a solvent-based or water-based system. Water-based PU systems are environmentally friendly and are becoming increasingly popular due to regulations and sustainability considerations.
Coating Process:
The PU system is typically applied as a coating onto a fabric substrate, creating a bonded layer that mimics the appearance and texture of genuine leather.
Embossing and Finishing:
After the PU coating is applied, the synthetic leather may undergo embossing to achieve textures resembling natural leather. Various finishing processes, such as dyeing, printing, or adding a protective topcoat, can be employed to enhance the aesthetic and functional properties.
The specific formulation of the PU system can vary based on the manufacturer's requirements and the desired characteristics of the synthetic leather. PU systems offer versatility, allowing for the production of a wide range of synthetic leather products used in upholstery, fashion, automotive interiors, and more
