Olefin block copolymer-based hot melt adhesive composition

A technology of hot melt adhesive and olefin block, which is applied in the directions of polymer adhesive additives, adhesives, adhesive additives, etc. Effects of spray uniformity, excellent bond strength, excellent wet strength

Pending Publication Date: 2021-12-24
HENKEL KGAA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Modern high-speed production lines for disposable products run at a speed of up to 400-500 meters per minute. Once the hot-melt adhesive fails to fall into the application window, the adhesive performance of the hot-melt adhesive may not meet the requirements of continuous preparation.
For single-use hygiene applications, conventional APO-based hot melt adhesives cannot meet one or more of these requirements

Method used

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  • Olefin block copolymer-based hot melt adhesive composition
  • Olefin block copolymer-based hot melt adhesive composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 7 and comparative example 1 to 7

[0137] Adhesives were prepared by conventional methods in the art using the components in the amounts (parts by weight) listed in Table 1, and their properties were tested by the above-mentioned methods, and the evaluation results are shown in Table 1.

[0138] Table 1:

[0139]

[0140] Table 1 (continued):

[0141]

[0142] As can be seen from Table 1, the adhesives of the present invention (Ex. 1 to 7) exhibited good wet strength, good odor, good wet bond strength and good spray uniformity.

[0143] Comparative Examples 1 to 2 (CE.1 and CE.2) did not use MA grafted wax, Comparative Examples 3 to 5 and 7 (CE.3 to CE.5 and CE.7) did not use OBC, and Comparative Example 6 ( CE.6) Use MA grafted wax and OBC with MI outside the range of 10 to 35g / 10min (@190°C, 2.16kg); compared to the adhesive of the present invention, they all exhibit one or more unsatisfactory performance.

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Abstract

The present invention provides a hotmelt adhesive composition, comprising: (A) an olefin block copolymer of ethylene and octene, having a melt index of 10 to 35 g / 10 min at 190 DEG C, 2.16 kg, preferably 15 to 30 g / 10 min at 190 DEG C, 2.16 kg, and (B) a wax modified with carboxylic acid and / or carboxylic acid anhydride.

Description

technical field [0001] The present invention relates to a hot melt adhesive composition, in particular to a hot melt adhesive composition based on an olefin block copolymer, especially for disposable articles. Background technique [0002] Hot melt adhesives have been widely used in disposable articles such as baby diapers, feminine sanitary napkins, which include multiple layers such as PE films, hydrophobic nonwoven layers, hydrophilic nonwoven layers, stretchable TPU films, tissue, cotton Wait. The layers are bonded together by hot melt adhesive. Disposable articles typically include a core for absorbing bodily fluids, and the core typically consists of a hydrophilic substrate as a wrap, and inside it is fluff and a superabsorbent polymer (SAP). The cores are typically immersed in body fluids, so adhesives used in the cores require high bond strength in both wet and dry conditions. Otherwise, the delamination of the layers can lead to leakage of bodily fluids, causing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C08L23/08C08L91/06C08L51/06
CPCC08L91/06C09J153/00C08L91/00C08L23/0815C08L51/06C08L53/00C09J11/08C08L93/04C08L57/02C09J2301/304C09J7/35C09J2301/408C09J2301/162C09J2301/414A61F13/539A61F2013/53908C08L23/26C09J2423/00C09J2453/00
Inventor 陈敏锐李伟溢
Owner HENKEL KGAA
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