As the main accessories of diaper products, the quality and performance of non-woven materials directly determine the quality and performance of diaper products. Spunmelt nonwovens include spunbond nonwovens, meltblown nonwovens and it is composite materials, which not only have high production capacity, low price, and stable performance; Water repellency, water permeable and non-retaining properties after hydrophilic finishing make it occupy a pivotal position in diaper products.
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Surface layer Spunmelt non-woven
Diaper surface layer, as a material in direct contact with the skin, is required to be soft and breathable, enabling rapid penetration of urine and almost zero water absorption, maintaining the dryness of the skin-facing surface_1]. The spunbond non-woven fabric after hydrophilic finishing can well meet the requirements of the surface layer of diapers. The spunbond nonwovens used in the surface layer of diapers are mostly SS (double-layer composite spunbond non woven machinery)/SSS (three-layer composite spunbond nonwovens) products after hydrophilic finishing, and their gram weights are mostly 13-23g /m. . The surface layer of adult diapers generally does not need deep processing, and the gram weight is mostly 13-15g/m; the surface layer of baby diapers will undergo different degrees of deep processing such as punching, embossing, and embossing according to the degree of product differentiation. 3D stereoscopic effect, the gram weight is mostly 17 ~ 23g/m.
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Anti-side leakage partition
The side leakage prevention material of diapers is mainly water-repellent spunmelt non-woven fabric. At present, the most widely used in the industry are SMS (two layers of spunbond S and one layer of meltblown M composite spunmelt nonwoven), SMMS (two layers of spunbond S and two layers of meltblown M composite spunmelt nonwoven) ), SSMMS (spun-melt non-woven fabric composed of Z-layer spunbond S and two layers of melt-blown M), its gram weight range is generally 11~15g/m.
With the development of diaper products in the direction of lightness, thinness and softness, new requirements and challenges have been put forward for the anti-side leakage partition, that is, it is hoped that the spunmelt nonwoven fabric has a lower gram weight and high hydrostatic pressure resistance. In order to reduce costs, companies generally choose cost-effective materials, which is inevitable for market development and changes.
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Back layer spunmelt nonwovens
The properties of the back layer of diapers are required to be soft and breathable, with a certain anti-water seepage ability, and strong tensile strength, tear resistance and wear resistance. The raw materials, process design, production efficiency and product performance of spunmelt nonwovens can well meet these needs. Therefore, the current market
More than 80% of diaper products are backed by spunmelt nonwovens. In recent years, in order to meet the diversified needs of diaper products, many non-woven fabric manufacturers have launched a series of new products featuring high elasticity, fluffy, cotton soft, comfortable soft, silk soft and so on. but
These nonwovens need to pay attention to the following points in practical application:
(1) Soft and fluffy treatment of non-woven fabrics, whether using mechanical methods or adding functional materials to raw materials, will lose the tensile strength of non-woven fabrics. Especially the loss of transverse tensile strength makes it more suitable for use in diapers. Applications are greatly affected.
(2) In order to control the cost of low-end diapers, the back layer non-woven fabric is generally 12~15g/m2 spunbond non-woven fabric, and the non-woven fabric with soft treatment within this gram weight range has its transverse tensile strength - Generally 0.15~0.25kN/m. The test shows that if other structural materials are unchanged, to meet the requirements of arc-cut diapers, the transverse strength of ≥0.28kN/m is more suitable, otherwise the diapers will be deformed or even broken during use. However, when it is applied to a diaper product with large elastic ears, the product will not be deformed or broken due to the connection of the large elastic ears, and it can also enrich the style, feel and appearance of the diaper product.
(3) The cost space of high-end diapers is relatively large. The back layer non-woven fabric is generally 17~23 g/m2 spunbond non-woven fabric. Within this gram weight range, the spunbond non-woven fabric has a large operating space for softening, and various styles of non-woven fabrics can be used. The back layer spun-melt non-woven fabric can meet the needs of diapers.
SUNTECH Spunmelt non woven machine can produce low weight nonwoven material like 8gsm,which is strong,soft,thin. For more information,please check here:
