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Non-woven fabrics are classified into three categories according to the processing method, namely: Web-forming method: wet-laid non-woven fabric, dry-laid non-woven fabric and polymer direct web-forming method. They are completely different in terms of materials, tools and craftsmanship. The following will explain the difference between wet-laid non-woven fabrics and dry-laid non-woven fabrics.
1. Difference between wet-laid non-woven fabric and dry-laid non-woven fabric on the web
(1) Wet mesh:
Using water as a medium, the short fibers are uniformly suspended in the water, and under the action of the water flow, the fibers accumulate on the permeable screen belt or perforated drum to form a wet fiber web. That is, wet-laid non-woven fabrics are fiber webs made by pre-dehydrating water, fiber and chemical additives, and non-woven fabrics are obtained after using physical and chemical methods to fix the web.
(2) Formation of dry network:
This means that natural fibers or chemically shortened fibers are used to form fiber webs in a dry state by mechanical, air flow, centrifugal force, etc., resulting in non-woven fabrics.
2. Difference between wet-laid non-woven fabric and dry-laid non-woven fabric in raw materials
Most of the raw materials used in wet-laid non-woven fabrics are composed of hygroscopic and naturally biodegradable fibers. The fiber length is usually 2-12mm. Equipment is a specific tool that is transformed through technology using papermaking machinery and the process is evolved from the papermaking technology process. The non-woven products produced by the wet process have strong variability, and the non-woven fabrics produced by the wet process have incomparable advantages with other processes: for example, the fabric surface is smooth and does not irritate the skin, the longitudinal and transverse strength differences are small, the tensile strength is balanced, and the density is uniform. well, It creates static electricity, etc. The biggest feature is that it is easy to discard and can be naturally degraded, which is beneficial for environmental protection.
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