A low-gram weight composite dust-free paper for a one-time forming absorbent core wrapping layer

Abstract

The invention relates to integrally-formed low-gram-weight composite air-laid paper. A low-gram-weight air-laid paper layer prepared from fluff pulp and superfine hot-melting staple is arranged on the surface layer of the air-laid paper, and a non-woven cloth layer prepared from hot-melting chemical fiber is arranged on the bottom layer of the air-laid paper. Fluff pulp boards are roughly smashed and fine smashed for fiber decomposition to form fluff pulp fiber, the fluff pulp fiber and the superfine hot-melting staple are quantitatively and uniformly sprayed on a net band, and the superfine hot-melting staple and the fluff pulp fiber are subjected to heat bonding through an oven air duct to form the low-gram-weight air-laid paper layer; the non-woven cloth layer is subjected to glue applying or directly compounded with the air-laid paper layer coming out of the oven air duct to form the low-gram-weight composite air-laid paper. According to the low-gram-weight composite air-laid paper, the heat bonding of the air-laid paper layer and the non-woven cloth layer is achieved through hot pressing points or ultrasonic waves. Due to integrally-formed composite non-woven cloth, the strength of the composite air-laid paper is much higher than that of traditional air-laid paper, and the strength requirement for air-laid paper materials during high-speed production on a moisture-absorption article device is met.

Description

technical field [0001] The patent of the present invention relates to the technical field of hygroscopic products, in particular to a low-gram-weight composite dust-free paper for the wrapping layer of an absorbent core formed at one time. Background technique [0002] Infants, young children and other dependent persons often wear absorbent articles, such as diapers. The function of an absorbent article is to contain excreta and to isolate these excreta from the wearer's body and clothing and bedding. Absorbent articles, such as diapers, generally consist of a liquid topsheet, a liquid impermeable backsheet, and an absorbent and liquid containing absorbent core disposed between the liquid permeable topsheet and the liquid impermeable backsheet. The absorbent core is usually uniformly mixed with fluff pulp and super absorbent resin (SAP), and then wrapped by spray glue of the wrapping layer material once. However, during use, due to the relative movement of the wearer when ...

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Problems solved by technology

Use 50g dust-free paper as the upper and lower layers of the composite core. The fluff pulp and ultra-fine short fibers contained in the dust-free paper have small gaps in the fiber net, which can quickly absorb urine and effectively isolate SAP saturated absorption after being placed for a period of time. Low-molecular-weight polyacrylic acid, and these leached substances will make the surface of the composite core sticky and even cause skin allergies; and because the high-weight dust-free paper is hydrophilic and water-retaining, the moisture retained by itself is difficult to be absorbed by SAP , so the surface layer of the composite core will be relatively humid; and if the hot-air non-woven fabric is used as the upper and lower layers of the composite core, the diversion effect is good and the water absorption is fast, but due to the large pores of the hot-air non-woven fabric fiber web, it is easy to leak SAP. And the isolation effect on polyacrylic acid with low molecular weight is poor, so there are certain disadvantages. At the same time, because the material is relatively thin, the SAP particle feeling of the composite core is relatively strong.

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