Wet wipes are divided into two types according to their materials: one is wet-strength paper and the other is non-woven fabric. Most of the wet wipes are made of non-woven fabric. If subdivided, most of the raw non-woven fabrics are spunlace; In terms of materials, it can be divided into two types: polyester and cotton. Polyester has a hard and slippery feel and cotton has a soft feel. The so-called wet-strength paper refers to paper with a wet-strength agent. Generally speaking, the wet-strength paper has the following standards:
Wet strength/dry strength (tensile strength)>20%; when damp or immersed in water, it still maintains more than 15% dry strength and can resist cracking or dissociation of paper. Different products also have other properties, such as higher stiffness and printability, good smoothness, especially appearance properties (such as holes, stains and dust, etc.). Papermaking with chemical wood pulp or cotton pulp, and adding wet strength agents such as melamine resin and polyepichlorohydrin to obtain wet strength during the papermaking process.
Map paper (sea drawings), recording paper with special waterproof requirements, etc., banknote paper also belong to a large category of wet-strength paper. The first wet strength agent used UF resin and MF resin, because it contains a large amount of formaldehyde and needs to be in an acid system to have a good wet strength effect. Therefore, UF and MF resins are gradually eliminated, and PAE or called PAE is gradually used. PPE resin, this resin can obtain good wet strength effect in a slightly neutral system, and it does not contain formaldehyde.
Non-woven fabric, also called non-woven fabric, is composed of oriented or random fibers. It is called cloth because of its appearance and certain properties. Non-woven fabric has the characteristics of moisture-proof, breathable, flexible, light weight, non-combustible, easy to decompose, non-toxic and non-irritating, rich in color, low price, and recyclable. For example, polypropylene (PP material) pellets are mostly used as raw materials, which are produced by continuous one-step method of high-temperature melting, spinning, laying, and hot-pressing coiling.