What are the core raw materials of non-woven bags?
Polypropylene (PP): Accounts for over 80% (data from the China Industrial Textiles Industry Association, 2022), formed through meltblown or spunbond processes. Characteristics include: Low cost (approximately 12,000 RMB/ton), lightweight, and tensile strength of 30-50 N/5cm;
Resistant to acids and alkalis but poor temperature resistance (softening point approximately 120℃).
Polyester (PET): Commonly used in high-end shopping bags. Features include: Excellent abrasion resistance and UV resistance, but more difficult to degrade than PP;
Higher cost (approximately 18,000 RMB/ton).
Natural fibers (cotton, linen, viscose): Environmentally friendly and biodegradable, but 3-5 times more expensive than PP, suitable for short-term use.
Comparison of Environmental Performance between Nonwoven Fabrics and Traditional Plastics
Degradation Time: PP nonwoven fabric partially degrades in natural environments in approximately 5 years (EU Environment Agency research);
PE plastic bags require over 100 years and generate microplastic pollution.
Carbon Footprint: Producing 1 kg of PP nonwoven fabric emits 2.1 kg of CO₂, while PE plastic emits 3.5 kg (International Energy Agency data).
How to Choose Materials Based on Needs?
Supermarket Shopping Bags: PP material is preferred, balancing cost and load-bearing capacity (recommended weight ≥ 80g/m²);
Fashion Tote Bags: PET + printing process enhances aesthetics;
Medical Protective Equipment: SMS nonwoven fabric with added antibacterial agents (weight ≥ 25g/m²).
