Hot-melt adhesive possible to be coated at low temperature

A hot-melt adhesive and coating technology, which is applied in the direction of adhesives, etc., can solve the problems of shortened machine life, increased energy consumption, and accelerated carbonization of hot-melt adhesives, so as to save energy, prolong equipment life, and improve product quality.

Inactive Publication Date: 2005-10-26
广州慧达精细化工有限公司 +1
View PDF0 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above coating method, the temperature of the hot melt adhesive is generally controlled between 130°C and 180°C, but since the melting point of polyethylene film is about 125°C, the melting point of typical polypropylene non-woven fabric is about 165°C, so After the hot melt adhesive is applied, the materials of the above-mentioned disposable sanitary products will be ironed through, wrinkled, etc. These phenomena are especially serious when the coating method is directly scraped.
At the same time, high coating temperature will also lead to adverse consequences such as increased energy consumption in the production process, shortened machine life, and accelerated carbonization of hot melt adhesives.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]

[0046] I-1 and I-2 are actually hot melt adhesives with conventional coating temperature. Although their softening point and peel strength are suitable, due to their high viscosity, they are all greater than 2000cps at 130°C, and their fluidity is poor, and their minimum coating temperature is greater than 125°C. However, I-3 uses a thermoplastic rubber with a large melt index, so the viscosity of the product is only 1600cps at 130°C, and the minimum coating temperature can be as low as 114°C, which satisfies the requirements of hot melt adhesives for low coating of disposable sanitary products. cloth temperature requirements. The above three formulas are all suitable for use as the back adhesive of women's sanitary napkins or panty liners.

Embodiment 2

[0048] formula

[0049] As can be seen from Example 2, changing to different specifications but at least one thermoplastic rubber with a melt index greater than 12g / 10 minutes and other plasticizers and tackifying resins can also be used to make a disposable sanitary product that meets the requirements. Low temperature coating hot melt adhesive.

Embodiment 3

[0051] formula

[0052] The formulations III-1 and III-2 use thermoplastic rubber with a melt index of less than 12g / 10 minutes. They have the performance of general structural adhesives for disposable sanitary products, but due to the high viscosity at 130°C, the minimum coating temperature is still high . The III-3 formula uses a part of rubber with a high melt index, and its viscosity at 130°C drops significantly, and the minimum coating temperature reaches 116°C, which meets the requirements of low temperature coating.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
melt flow indexaaaaaaaaaa
melting pointaaaaaaaaaa
melting pointaaaaaaaaaa
Login to view more

Abstract

The present invention relates to a thermal melt adhesive which can be coated at low temperature. It contains at least a thermoplastic rubber whose melt index is greater than 12g / 10min, plasticizer, tack-product resin and antioxidant. The Brabender viscosity of said thermal melt adhesive when which is being at 130 deg.C is less than 2000 cps, so that said thermal melt adhesive can be coated for use below 120 deg.C. Said thermal melt adhesive mainly can be used as positioning adhesive for disposable sanitary product.

Description

field of invention [0001] The invention relates to a hot-melt adhesive, in particular to a hot-melt adhesive that can be coated at a low temperature, and belongs to the field of polymer product processing. Background technique [0002] In the production of disposable sanitary products, hot melt adhesive is usually applied to the workpiece at high temperature (about 130 ° C ~ 180 ° C), it mainly plays two functions: 1) structural adhesive, that is, hot melt adhesive in the When not completely cooled, different or the same materials are fixed together, these materials include polyethylene film, non-woven fabric, absorbent paper, wood pulp, etc. Examples of this use include the production of diapers, the production of surgical gowns, etc.; After the hot melt adhesive is completely cooled, the release paper can still be pasted on other substrates. Examples of such uses include sanitary napkins, panty liners, medical tape, and the like. [0003] In the production of disposable...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C09J153/00
Inventor 吴永升
Owner 广州慧达精细化工有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap