As synthetic leather manufacturers increasingly focus on surface consistency, mechanical durability and stable high-speed processing, the selection of the base fabric has become an important part of PU/PVC leather production. A suitable substrate does more than support the finished leather. It affects coating penetration, bonding strength, dimensional stability, embossing quality and the final product's resistance to tearing and deformation. For these reasons, Spunlace For Artificial Leather has become a practical substrate solution for footwear, bags, furniture upholstery, automotive interiors and other coated-material applications.
Aojia Nonwoven's leather base fabric is produced from 100% polyester spunlace nonwoven and is designed specifically as a substrate for synthetic leather. The product is available in a weight range of 45–130 g/m² and widths from 1450 to 3200 mm. Its high-density, multi-layer and uniform structure is designed to provide high tear strength, uniform absorption and good moldability during subsequent synthetic leather processing.
Spunlace nonwoven for artificial leather is an engineered fiber substrate placed beneath a PU or PVC surface layer. Unlike a conventional woven textile backing, spunlace is formed by mechanically entangling fibers through high-pressure water jets. This creates a nonwoven fiber network without relying on a conventional warp-and-weft construction.
For synthetic leather production, this structure is important because the base fabric needs to perform several functions simultaneously. It must provide mechanical reinforcement, accept coating materials consistently, maintain its dimensions during drying and embossing, and provide sufficient flexibility for cutting, sewing, laminating or molding.
A conventional woven textile can provide strong directional tensile properties because of its yarn structure. A spunlace substrate instead provides a more uniform fiber network, which can be engineered for controlled porosity and surface consistency. For coating manufacturers, this is particularly useful because the substrate is not simply a backing material; it becomes part of the final leather structure.
Aojia describes its leather base fabric as a high-density, multi-layer and uniform 100% polyester spunlace structure, specifically intended as a base for high-quality synthetic leather.
The fiber composition of a leather substrate directly affects how the material behaves during coating and subsequent use. Polyester is particularly suitable when manufacturers require mechanical strength, dimensional stability and resistance to moisture-related deformation.
High tear strength is one of the most important requirements. During coating, drying, embossing, cutting and sewing, the substrate can experience tensile and localized stresses. A high-strength polyester spunlace structure helps maintain the integrity of the backing and reduces the risk of tearing during processing. In the finished synthetic leather, the backing also contributes to overall tear resistance. Aojia specifically identifies high tear strength and superior tear resistance as key characteristics of its leather substrate.
Uniform fiber distribution is another technical advantage. A consistent fiber network helps create a more stable substrate surface and reduces variations in coating absorption. This becomes increasingly important when the finished leather requires a consistent thickness, texture or embossed pattern.
Dimensional stability is equally important in continuous production. Excessive shrinkage, stretching or distortion can affect coating thickness, pattern registration and downstream cutting accuracy. Polyester is widely used in technical nonwoven structures because it provides stable mechanical performance while maintaining the shape of the substrate through processing.
The substrate also needs good moldability. Synthetic leather can be formed around curved surfaces in applications such as automotive interiors, furniture components, footwear and bags. A flexible but structurally stable spunlace substrate can follow these shapes without losing its integrity.
For artificial leather manufacturers, one of the key questions is not simply whether a fabric can receive PU or PVC, but whether it can support controlled and repeatable coating penetration.
The pore structure of spunlace provides pathways through which coating materials can interact with the substrate. When the fiber network is sufficiently uniform, PU or PVC can penetrate the surface more consistently rather than accumulating irregularly in isolated areas. This helps reduce variations in bonding and surface formation.
Uniform porosity therefore has a direct relationship with coating consistency. A substrate with inconsistent density may absorb different quantities of resin across the width or between production batches. This can contribute to variations in surface appearance, thickness or mechanical behavior.
The second consideration is coating penetration. The objective is not necessarily maximum penetration, but controlled penetration appropriate to the coating system and finished leather construction. The substrate's density, thickness, fiber distribution and coating viscosity should be considered together.
Adhesion is another critical factor. A well-engineered spunlace structure provides a large fiber surface area for interaction with the PU/PVC layer. Aojia identifies strong adhesion with PU/PVC coatings as one of the principal advantages of its leather base fabric.
The result is a more consistent composite structure in which the decorative or protective surface layer and reinforcing base work together. For manufacturers, this can influence finished leather durability, tear resistance and processing stability.
Selecting Spunlace For Artificial Leather should start with the requirements of the finished synthetic leather rather than choosing a fabric solely according to GSM.
Aojia's leather base fabric is specified at 45–130 g/m², with widths from 1450–3200 mm. The appropriate basis weight depends on the intended leather construction, required reinforcement, coating system and downstream converting process.
Basis weight influences substrate bulk and mechanical reinforcement. A lighter substrate may be appropriate when flexibility and material economy are priorities, while a heavier structure can provide additional support for applications requiring greater body and tear resistance.
Width affects production efficiency. The 1450–3200 mm range can support different coating and slitting configurations and can help manufacturers optimize material utilization for wide synthetic leather production.
Manufacturers should also evaluate density, thickness and fiber uniformity. These parameters influence coating absorption, surface smoothness and the consistency of the final composite. For high-speed production, batch-to-batch stability can be as important as the nominal specification itself.
Beyond standard specifications, finishing requirements may also need to be considered. Aojia states that its broader spunlace production capability supports customized processes such as water repellency, flame retardancy, anti-aging, anti-static, anti-bacterial and anti-ultraviolet treatments for application-specific requirements.
The application range of spunlace leather substrate extends beyond conventional footwear leather. Because the material combines reinforcement, coating compatibility and dimensional stability, it can be incorporated into multiple synthetic leather constructions.
In footwear, the substrate supports PU/PVC leather that must withstand repeated bending, stretching, abrasion and stitching. Consistent fiber structure and tear strength are particularly relevant when the material is cut and assembled into complex shoe components.
For bags and luggage, the backing contributes to the structural stability of the coated surface. It can help synthetic leather maintain its shape while supporting repeated folding, stitching and handling.
In furniture upholstery, the substrate must work with larger coated surfaces and withstand repeated mechanical stress. Consistent coating adhesion and dimensional stability can become important during cutting, sewing and upholstery installation.
For automotive interiors, synthetic leather may be used for seats, interior trim and other covered components. The substrate must accommodate forming and bonding requirements while maintaining mechanical integrity. Aojia specifically lists furniture and automotive upholstery, including car seats and interiors, among the target applications of its leather base fabric.
The material can also be used in sports equipment, consumer products and luxury packaging, where manufacturers require a stable base beneath a decorative or protective synthetic leather layer.
The performance of artificial leather cannot be determined by its surface coating alone. PU or PVC chemistry, coating thickness, curing conditions and embossing parameters are important, but the substrate provides the mechanical foundation beneath these layers.
A suitable spunlace base fabric can help manufacturers achieve a balance between tear strength, coating penetration, adhesion, dimensional stability and moldability. This balance becomes especially important when synthetic leather is produced in wide rolls and processed through continuous coating and finishing lines.
For buyers evaluating a Spunlace For Artificial Leather supplier, it is therefore useful to look beyond a single GSM number. Fiber composition, fiber distribution, porosity, width, thickness, mechanical strength and processing consistency should be evaluated together with the requirements of the PU/PVC coating system.
Aojia Nonwoven positions its leather base fabric within its broader base-cloth manufacturing portfolio and states that it operates two spunlace production lines, including a line dedicated to product development and R&D. The company also provides customized production for special specifications and application requirements.
For synthetic leather manufacturers, this approach makes the spunlace substrate more than a conventional backing fabric. It becomes an engineered component of the finished leather structure—one that can influence coating behavior, processing stability and long-term product performance.
