How PU and Artificial Leather Are Manufactured: Types, Embossing, and Surface Treatment

How Is PU Leather Made? The Manufacturing Process Step by Step

The artificial leather manufacturing process begins with a base fabric, usually a woven or non-woven textile, that forms the structural core of the finished material. This fabric is coated with a polymer layer — polyurethane (PU) is the most common choice for mid- to high-grade synthetic leather — which is built up in one or more passes to reach the target thickness and surface character.

Coating can be applied directly onto the fabric or, more commonly for textured products, cast first onto a patterned release paper and then laminated to the fabric before the paper is peeled away. This second method, known as transfer coating, is the primary route for producing PU leather with fine, consistent surface grain, since the texture is essentially molded into the resin rather than pressed in afterward. Once coating and lamination are complete, the material passes through embossing and surface treatment stations before final inspection, grading, and rolling.

Types of Synthetic Leather

Not all synthetic leather is built the same way, and the base polymer used has the biggest effect on how the material handles, wears, and performs across different applications. Understanding the main categories makes it easier to specify the right material rather than defaulting to whatever a supplier happens to stock.

Common synthetic leather types and where they're typically used

PU Leather vs. PVC Leather: Which Fits the Application

PU leather generally offers a softer hand-feel and better flexibility than PVC, along with somewhat better breathability, which is why it's the more common choice for apparel, bags, and upholstery where comfort against skin matters. PVC leather trades some of that softness for higher resistance to water, abrasion, and general wear, making it a frequent choice for outdoor furniture, marine applications, and heavy-duty items that need to withstand repeated exposure to moisture and rough handling.

Cost also plays a role in the decision — PVC leather is typically less expensive to produce, which keeps it common in budget-focused product lines, while PU leather's better hand-feel and appearance make it the more common choice where perceived quality matters more than raw durability.

Leather Embossing Process and Texture Transfer Paper

The leather embossing process is what gives synthetic leather its recognizable grain — natural hide patterns, smooth nappa finishes, or entirely custom textures. There are two general approaches: direct embossing, where a heated engraved roller presses the pattern into the coated surface after it's applied to the fabric, and transfer embossing, where the pattern is built into the material during coating itself using leather texture transfer paper.

Texture transfer paper carries a fine, durable embossed pattern on its surface, and PU resin is cast directly onto it so the pattern transfers into the resin as it cures. Once the coated layer is laminated to the base fabric and fully cured, the transfer paper is peeled away, leaving the pattern permanently set into the leather surface. This method tends to produce sharper, more consistent detail than post-application embossing, and because the transfer paper can be reused across multiple production runs, it also supports high-volume production of the same texture pattern at a lower per-unit cost over time.

PU Leather Surface Treatment

Surface treatment is the finishing stage that turns a coated and embossed sheet into a material ready for its intended use, and the treatments applied here have a significant effect on how the leather performs in the field even though they don't change the base structure underneath.

Choosing the Right Synthetic Leather Type and Finish

• Match base polymer to use case — PU for softness and hand-feel, PVC for durability and moisture resistance
• Consider embossing method for texture needs — transfer embossing for fine, consistent natural-grain patterns; direct embossing for simpler or custom designs
• Specify surface treatment based on end environment — abrasion resistance for high-contact furniture, water resistance for outdoor or automotive use
• Balance cost against performance requirements — higher layer counts and finer texture transfer add cost but improve appearance and durability
• Confirm supplier consistency — ask about texture transfer paper reuse limits and quality control checkpoints across a production run