Water-disintegrable resin film laminated water-disintegrable resin film, water-disintegrable composite laminate and method for production thereof

Abstract

A water-disintegrable resin film, characterized in that it exhibits a tensile strength of 2 N / 25 mm width or more after the surface thereof is pressed by a cotton gauze impregnated with water of 40 DEG C. with a pressure of 1.47 N / cm<2 >for 5 hours under a condition wherein the temperature is 40 DEG C. and the relative humidity is 90%, and exhibits a start time for the disintegration thereof by water, which means the time needed until it starts to lose its form, of 600 seconds or less, in a test nearly according to JIS P 4501 for the capability of being united. The water-disintegrable resin film has a predetermined mechanical strength under a wet and warm or hot condition and also exhibits excellent disintegradability for a large amount of water, and thus can be suitably used as a back sheet of a liner for sanitary goods, which requires the combination of good water resistance and good water-disintegradability.

Description

technical field [0001] The present invention relates to a hydrolyzable resin film, a hydrolyzable resin laminated film, and a hydrolyzable resin film suitable for use as a back sheet of sanitary product liners such as physiological liners, fabric liners, and incontinence liners. Composite laminate and method of making the same. Background technique [0002] At present, liners for sanitary products are being widely used. Generally speaking, the liner for sanitary products is made by superimposing a liquid-permeable top sheet and a liquid-impermeable backing, and making the opposing peripheral parts It is integrally formed, and a liquid absorber is stored between the upper cover sheet and the opposite inner side of the above-mentioned base liner. In addition, there is formed on the outer surface of the above-mentioned base liner for fixing the sanitary product liner to the underwear freely. Adhesive layer. [0003] The above sanitary product liners will be discarded after us...

AI Technical Summary

Problems solved by technology

[0008] However, the above-mentioned laminated film and the above-mentioned disposable article do not take into account the situation that they are used under the conditions that deformation stress is often applied in the above-mentioned high-temperature and humid state, and the outer peripheral end surface of the bottom liner in the sanitary article liner is exposed to the outside. The state is in the state of being directly exposed to the above-mentioned high-temperature and humid environment. Therefore, when the above-mentioned laminated film and the above-mentioned disposable products are used as the backing of the sanitary product liner under high-temperature and humid conditions, the mechanical strength such as tensile strength will be significantly reduced. There is a problem of damage such as cracking due to deformation stress

[0009] In addition, when using the sanitary product liner, it can be worn on the underwear freely through the adhesive layer and peeled off from the underwear after use. The mechanical strength of the laminated film and the above-mentioned disposable products will be greatly reduced in a high-temperature and humid wearing environment

[0010] Therefore, when the sanitary product liner is peeled off from the underwear, the backing (the above-mentioned laminated film and the above-mentioned disposable product) cannot resist the adhesive force of the adhesive that integrates the backing and the underwear, and will be damaged in its thickness direction. If it breaks, a part of the backing will remain on the underwear, that is, so-called delamination will occur, and as a result, there is also a problem of staining the underwear due to the adhesive remaining on the underwear

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