Method for manufacturing pants-type absorbent articles

Abstract

The present invention is a method for manufacturing pants-type absorbent articles provided with an absorbent main body (2) and an outer covering (3) disposed on the non-skin-facing side of the absorbent main body (2), wherein each of the skin-facing surfaces at the two ends of the absorbent main body (2) in the longitudinal direction are individually covered by covers (5, 6) that are separate from the outer covering (3). This method for manufacturing pants-type absorbent articles comprises: a raw fabric sheet-cutting process for making cuts in a single band-shaped raw fabric sheet (10A) that is moving, the cuts being made along the movement direction (MD), to cut an outer covering-configuring sheet (11) for configuring the outer covering apart from a cover-configuring sheet (12) for configuring the covers; and a main body-bonding process for bonding the respective sheets (11, 12), which have been cut apart in the raw fabric sheet-cutting process, with absorbent main bodies (2).

Description

technical field [0001] The present invention relates to a method for producing underpants-type absorbent articles such as underpants-type disposable diapers. Background technique [0002] At present, as a shorts-type disposable diaper, the structure widely used is: an outer body that includes an absorbent main body and is arranged on the non-skin-facing side of the absorbent main body to fix the absorbent main body has a front-back direction corresponding to the wearer. The longitudinal direction and the transverse direction perpendicular thereto, and in the longitudinal direction, there are an abdominal part disposed on the abdomen side of the wearer and a dorsal part disposed on the back side in the longitudinal direction, and the exterior of the ventral part in the exterior body The body ventral region and the exterior body dorsal region located in the dorsal portion are joined to each other on both side edges in the longitudinal direction to form a pair of side seals, a ...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of disposing the above-mentioned leak-proof sheet is to prevent leakage from the longitudinal ends of the absorbent main body. Therefore, in order to achieve this purpose, it is sufficient to wrap the longitudinal ends of the absorbent main body and its vicinity with the above-mentioned leak-proof sheet, such as As described in Patent Document 1, in the method of folding the outer layer sheet constituting the outer body to cover the longitudinal end of the absorbent main body, the part of the outer body that is located on the outer side in the longitudinal direction compared with the longitudinal end of the absorbent main body The entire area of ​​the part is covered by the folded outer layer sheet (leak-proof sheet), so depending on the fixed position of the absorbent main body, the leak-proof sheet may become unnecessarily large, which is disadvantageous in terms of manufacturing cost

In addition, in the case of folding the outer layer sheet, it is necessary to provide a device such as a conveyor belt dedicated to the folding of the outer layer sheet having a corresponding length in the flow direction of the outer layer sheet, and the use of such a device may be disadvantageous in terms of manufacturing cost.

[0006] In contrast, as described in Patent Document 2, a sheet different from the exterior body is used as a leak-proof sheet to cover the longitudinal end of the absorbent main body and its vicinity (should be used to prevent leakage from the longitudinal end of the absorbent main body). In the case of the part covered with a leak-proof sheet), it is necessary to install a sheet unwinder dedicated to the leak-proof sheet blank different from the exterior, and a transfer line dedicated to the leak-proof sheet blank starting from the unwinder is required. Therefore, there are May lead to increased equipment cost, expensive to manufacture

In addition, when the leakage-preventing sheet raw material unwound by the unwinder includes a portion disposed on one end side of the absorbent main body in the longitudinal direction and a portion disposed on the other end portion side, it is necessary to scissor the leakage-preventing sheet raw material. The cutting machine is divided into two parts along the unwinding direction, and the predetermined tension is applied to the leak-proof sheet blanks of the smaller width of the two divided parts respectively, so that they can travel on a dedicated transmission line. When stretching a small leak-prevention sheet material for a long distance while applying a predetermined tension, the width of the leak-prevention sheet material may decrease, resulting in a decrease in product quality

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