Raw Materials for Industrial-Grade PVC Laminated Fabrics

Industrial-grade PVC laminated fabric is a composite structural material. Its raw material system comprises three core components: a high-strength base fabric, PVC functional film materials, and functional additives. These elements work in concert—each indispensable—to ensure the fabric's stability, durability, and industrial-grade performance.

Raw Materials for High-Strength Base Fabric

The base fabric serves as the structural skeleton of the PVC laminate. It determines the material's tear resistance, tensile strength, and dimensional stability, forming the foundation of its mechanical properties and acting as a key differentiator between industrial-grade and ordinary fabrics. While standard consumer-grade PVC fabrics often utilize low-quality synthetic textiles, industrial-grade products adhere to strict material selection standards.

Currently, the mainstream base material in the industrial sector is high-tenacity polyester filament, though nylon is selected for certain high-end or specialized applications. Polyester is the preferred choice for industry due to its high strength, low tensile deformation, resistance to shrinkage, moisture and UV resistance, and excellent cost-performance ratio, making it suitable for the vast majority of rigorous industrial environments. Depending on specific usage requirements, base fabrics are customized with weights ranging from 100 g/m² to 300 g/m². Lighter fabrics (100–150 g/m²) are used for light industrial protection and equipment linings, whereas heavier fabrics (250–300 g/m²) are employed for truck tarpaulins, construction site enclosures, and heavy-duty protective covers, offering significantly enhanced load-bearing capacity and impact resistance.

Furthermore, industrial-grade base fabrics utilize plain weave or ripstop (grid) weaving techniques. The constituent fibers are uniform in thickness and woven to precise density standards, fundamentally preventing issues such as deformation, sagging, or tearing. Unlike ordinary fabrics that use staple fibers (short fibers), industrial-grade fabrics are woven from continuous filaments. This results in vastly superior abrasion resistance and toughness, enabling the material to withstand long-term exposure to harsh conditions, including intense sunlight, wind loads, and mechanical friction. 

PVC Resin Film Layer Raw Materials

If the base fabric acts as the skeleton, the PVC resin film layer serves as the fabric's "protective outer shell." It determines core functional properties—such as waterproofing, airtightness, corrosion resistance, weatherability, and flame retardancy—making it the essential carrier of functionality for industrial-grade fabrics. Unlike coating processes, the lamination process involves bonding pure PVC resin films to both sides of the base fabric under high temperature and pressure; this results in film layers with superior uniformity and purity compared to standard coated fabrics. The primary raw material used is industrial-grade, high-purity PVC resin powder.

This industrial-grade PVC resin powder excludes recycled or impure materials, boasting a purity of over 99% and a stable molecular structure. The resulting film layer is dense and non-porous, achieving 100% waterproofing and airtightness while effectively blocking the penetration of rainwater, moisture, and dust. Furthermore, high-purity PVC resin offers enhanced resistance to acids, alkalis, oils, and industrial solvents. It is suitable for demanding industrial environments—such as chemical plants, mining sites, and cold-chain storage facilities—without being prone to corrosion, aging, or damage.

Many inferior fabrics utilize recycled PVC raw materials, resulting in uneven film thickness and susceptibility to blistering or delamination. They also often suffer from strong odors, yellowing, brittleness at low temperatures, and softening at high temperatures, failing to meet industrial standards. In contrast, genuine industrial-grade PVC resin raw materials undergo purification and modification processes. They offer a wide operating temperature range, maintaining stable performance between -30°C and 70°C without becoming brittle, sticking, or deforming across the changing seasons.

Multifunctional Additive System

A combination of polyester base fabric and PVC resin alone cannot meet the demands of complex industrial operating conditions. Specialized industrial-grade additives are essential to optimize properties such as weatherability, flame retardancy, aging resistance, and flexibility; this optimization represents a core technological barrier for industrial-grade fabrics. All additives utilize eco-friendly, industrial-grade formulations with precise mixing ratios, ensuring the structural stability of the fabric remains uncompromised.