Heat bonding non-woven fabric and preparation method thereof

Abstract

The invention relates to the technical field of non-woven fabric production, and provides a heat bonding non-woven fabric and a preparation method thereof. The heat bonding non-woven fabric comprises 60 percent by weight of thermoplastic fibers; the surface of the heat bonding non-woven fabric is provided with bumps; the gram weight is 25-35 g / m<2>, the integrated softness is less than or equal to 55 nN, the water absorption is more than or equal to 600%, and the liquid penetrability is less than or equal to 3 s. The heat bonding non-woven fabric provided by the invention has the advantages of simple production process, less energy consumption, high softness and fluffy degree and difficult product surface deformation, namely, the heat bonding non-woven fabric is good in hand feeling and more comfortable to use.

Description

technical field [0001] The invention relates to the technical field of non-woven fabric production, in particular to a heat-bonded non-woven fabric for producing sanitary napkins and paper diapers and a preparation method thereof. Background technique [0002] Hot rolling bonding and hot air bonding are two main processing methods in non-woven fabric thermal bonding reinforcement. Hot rolling bonding refers to a thermal bonding method in which a pair of hot rollers are used to heat the fiber web and a certain pressure is applied at the same time; hot air bonding refers to the use of hot air to penetrate the fiber web on the drying equipment to heat and melt it to form a bond. combined production methods. Hot-rolled bonded non-woven products have the characteristics of high output, low cost, high hygiene, high strength, and flat density, and are widely used in the manufacture of medical and health products, such as surgical gowns, masks, women's sanitary napkins and various ...

AI Technical Summary

Problems solved by technology

But in the production process of thermal bonding non-woven fabric of prior art, especially be used in the production of the thin thermal bonding non-woven fabric of sanitary napkin and paper diaper, mainly there are following problems: one, because the height of temperature directly affects The softness (hardness) of the product is produced by hot air or hot rolling process. If the melting degree is too high, the surface of the product will be too hard. If the melting temperature is too low, the bonding force between fibers will be reduced. The product is easily deformed, which affects the subsequent processing and use performance of non-woven products. For example, the melting point temperature of PE fiber in the outer layer of ES (PE / PP composite fiber) is 120 degrees-125 degrees, and the melting point temperature of PP fiber in the inner layer of ES is 140 degrees- 145 degrees, the production temperature of existing products is generally 128-135 degrees, so that the melting degree of PE fiber is about 80%. The tensile force of the non-woven fabric is too low, and the product is easy to break and deform; 2. The hot air process is mostly used in the prior art process, and the secondary printing is carried out after being rolled. The process is complicated, the energy consumption is large, and the product is easily damaged by the environment. 3. At present, most of the hot pressing rolls bonded by hot rolling are point pressure type, that is, there are multiple pressing holes on the surface of the pressing roll, and the contact area of ​​hot rolling is too large, so the products produced have low bulkiness. Good, less soft to the touch

[0004] Due to the existence of the above problems, the thin thermally bonded non-woven fabrics used in the production of sanitary napkins and paper diapers produced by the prior art usually have the disadvantages of relatively hard product surface, low bulkiness, or easy deformation, which have a great impact on product quality and Subsequent use performance has a greater impact, making the product grade lower and reducing the added value of the product