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Urine wetting coloring hot melt adhesive for paper diaper

A technology for hot melt adhesives and diapers, applied in the directions of adhesives, adhesive types, rosin adhesives, etc., can solve the problems of easy phase separation, low color intensity, dark color, etc., and achieve good hydrophilic performance, Low melt viscosity and fast discoloration

Active Publication Date: 2014-03-05
HANGZHOU FIRST APPLIED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of phosphoric acid, etc. is not conducive to human health and has potential safety hazards
[0004] Patent US5066711 discloses a color-developing hot melt adhesive, the main component of which is vinylpyrrolidone homopolymer or vinylpyrrolidone / vinyl acetate copolymer or ethylene / acrylic acid copolymer. Wet color-changing dyes, but this kind of hot melt adhesive has poor thermal stability and will be partially degraded after heating, showing carbonization, skinning, and darkening of color; and the compatibility of each component is poor, and phase separation is prone to occur; in addition, Another disadvantage of existing products on the market is that the color intensity is not strong. Only when the coated substrate is transparent can the color change be observed on the reverse side. If the substrate is translucent or opaque, it is difficult to observe the color change.

Method used

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  • Urine wetting coloring hot melt adhesive for paper diaper
  • Urine wetting coloring hot melt adhesive for paper diaper
  • Urine wetting coloring hot melt adhesive for paper diaper

Examples

Experimental program
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Embodiment 1～5

[0031] In the reaction kettle preheated to about 120°C, add accurately measured softener, surfactant, and antioxidant. After stirring evenly, add tackifying resin and continue stirring until the tackifying resin is completely melted, then add accurately Thermoplastic elastomer and acrylic terpolymer, add humidity indicator at the end, seal the reaction kettle, evacuate while stirring, at the same time continue to heat up the heat transfer oil to about 160°C, stir at high speed until all raw materials are completely melted and mixed evenly, Stop stirring, continue vacuuming, and discharge the material while it is hot after the hot melt adhesive defoams. Add a 200-mesh filter screen to the discharge port, and pour it into a sizing box lined with release paper to cool.

[0032] The raw material composition of each embodiment is as shown in Table 1.

[0033] Table 1

[0034]

[0035] Among the above raw materials:

[0036] SIS is purchased from American Kraton, and its melt i...

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Abstract

The present invention provides a urine wetting coloring hot melt adhesive for paper diaper. The urine wetting coloring hot melt adhesive is prepared from the following raw materials, by mass: 10-30 parts of a styrene thermoplastic elastomer, 20-60 parts of an acrylic acid terpolymer, 20-60 parts of a tackifying resin, 5-35 parts of a softener, 0.1-30 parts of a surfactant, 0.1-3 parts of an antioxidant, and 0.1-1 part of a humidity indicator. The urine wetting coloring hot melt adhesive has characteristics of low melt viscosity, contact angle of less than 40 DEG and good hydrophilicity, is suitable for low temperature coating, has characteristics of rapid color change, bright color and high strength after contacting water, and can be adopted as the urine wetting coloring hot melt adhesive of disposable hygiene products.

Description

(1) Technical field [0001] The invention relates to a hydrophilic hot-melt adhesive, in particular to a hot-melt adhesive that develops color after being wetted by urine, and belongs to the field of polymer adhesives. (2) Background technology [0002] Hot-melt adhesives are widely used in the fields of sanitary materials, medical treatment, and packaging supplies due to their characteristics of no solvent, no pollution, fast curing speed, and wide bonding range. Among them, hot melt adhesives based on styrene block copolymers are widely used in disposable sanitary products such as sanitary napkins, panty liners, and diapers because of their strong cohesive force, moderate melt viscosity, light color, low odor, and good stability. . [0003] Urine color-developing hot-melt adhesive is a hot-melt adhesive that changes color when it encounters liquids such as urine. The change in color directly reflects the condition of the urine, so that users can know by visual inspection w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J193/04C09J153/02C09J123/08C09J133/08C09J145/00C09J125/10C09J9/00C09J11/06
Inventor 严晓慧周光大林建华
Owner HANGZHOU FIRST APPLIED MATERIAL CO LTD
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