ES fiber and polypropylene fiber are both commonly used synthetic fibers in the processing and manufacturing industry. There are significant differences in raw material structure and performance characteristics between the two. Each has its own advantages and scenarios, and its cost-effectiveness also presents different characteristics. For manufacturers, accurately distinguishing between the two and mastering scientific procurement comparison methods are the keys to adapting to production needs and controlling costs. The following will provide a detailed analysis of the differences, advantages, cost-effectiveness, and purchasing comparison points between the two.

The core differences between the two are reflected in three aspects.

1. Raw materials and structure: ES fiber is a low melting point composite fiber, mostly polypropylene/polyethylene sheath-core structure; polypropylene fiber is a homopolymer fiber made of a single polypropylene raw material, with a uniform structure.
2. Core performance: The key advantage of ES fiber is hot-melt adhesion, which can achieve self-adhesion between fibers at low temperatures (110-130°C) without the need for additional adhesives; polypropylene fiber does not have hot-melt self-adhesive properties, but has better corrosion resistance and chemical resistance and lower density (0.90-0.92g/cm³).
3. Processing adaptability: ES fiber is mainly suitable for non-woven processes and can be directly made into non-woven fabrics; polypropylene fiber has a wider adaptability, covering spinning, weaving, non-woven and other processes.

In terms of advantage comparison, the core advantages of ES fiber are ease of processing and integrity of the finished product. The hot-melt self-adhesive properties can simplify the production process and improve production efficiency. The non-woven fabric produced has high strength, stable structure, and soft hand feel, and is suitable for high-end sanitary products and filter materials; The advantages of polypropylene fiber focus on cost and weather resistance. It has a wide source of raw materials, low production energy consumption, and the cost is 30%-40% lower than ES fiber. It is acid and alkali resistant and anti-aging. It is suitable for cost-sensitive scenarios such as outdoor building reinforcement, industrial filter cloth, and ordinary non-woven fabrics.

In terms of cost performance, the direct purchase cost of polypropylene fiber is lower, suitable for large-scale, low value-added product production, and the comprehensive cost advantage is significant; although the purchase price of ES fiber is higher, it can save the cost and man-hours of adhesive procurement and addition, and can also improve the quality of finished products. In scenarios such as high-end sanitary products and precision filter materials, it has a higher overall cost performance.

Manufacturers can follow four steps when purchasing and comparing:

1. Clarify production needs. If you need to simplify the nonwoven process and improve the softness and strength of the finished product, give priority to ES fiber; if you are pursuing low cost and suitable for outdoor/corrosive environments, choose polypropylene fiber.
2. Check the core indicators. ES fiber focuses on melting point and bonding strength; polypropylene fiber focuses on strength and corrosion resistance parameters.
3. Small batch trial production to compare the processing suitability, finished product qualification rate and final cost of the two fibers.
4. Calculate comprehensive costs, which not only look at raw material prices, but also include processing hours, auxiliary material consumption, finished product added value, etc.

To sum up, there is no absolute advantage or disadvantage between the two. Accurate selection must be combined with the production scenario and cost budget to maximize benefits.