Waxy Hot Melt Adhesives and Disposable Absorbent Articles

Abstract

1) Wax-containing hot melt adhesive comprising 1 to 40 % of a styrenic block copolymer (a), 3 to 15 % of a modified thermoplastic elastomer (b) comprising -COO- groups, and 5 to 25 % of a wax (c). 2) Disposable absorbent article employing said hot melt adhesive. The article bonded by the hot melt adhesive of the present invention has excellent creep resistance and aging resistance.

Description

technical field [0001] The invention relates to the technical field of disposable absorbent products, in particular to wax-containing hot-melt adhesives in disposable absorbent products and disposable absorbent products using the hot-melt adhesive. Background technique [0002] Hot melt adhesive is a kind of plastic adhesive. Its physical state changes with temperature within a certain temperature range, but its chemical properties remain unchanged. It is non-toxic and tasteless, and is an environmentally friendly chemical product. Hot-melt adhesive bonding is to use a hot-melt adhesive machine to melt the hot-melt adhesive through heat, and the glue after melting becomes a liquid, which is sent to the bonded object through the hot-melt adhesive tube and hot-melt adhesive gun of the hot-melt adhesive machine Surface, after the hot melt adhesive cools, the bonding is completed. [0003] There are many types of existing hot-melt adhesives, and related formulas have also been ...

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Problems solved by technology

[0009] Chinese patent CN1261617A discloses a multi-purpose hot-melt adhesive for disposable products, but the hot-melt adhesive does not contain wax, and the main polymer used is limited to SBS, which can be used as structural adhesive and elastic adhesive at the same time, making it The creep resistance is not high when bonding elastic materials; while Chinese patent CN1918257A discloses a hot melt adhesive for elastic attachment in non-woven fabrics, the hot melt adhesive must contain ionomer resin, this ionomer The polymer resin mainly refers to the copolymer of ethylene and acrylic acid or methacrylic acid partially neutralized by metal ions. It has a certain polarity and carries metal ions. At the application temperature, the double bond in the raw material is triggered to open and repolymerize to produce The tendency of crosslinking; its polarity and metal ions will also lead to poor compatibility with thermoplastic elastomers, which will lead to poor aging resistance of products made of this hot melt adhesive

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