Rubber Adhesive Attachment for Absorbent Articles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Adhesives used in absorbent articles, such as sanitary napkins, degrade over time due to temperature and oxygen exposure, and can migrate through the film layer into the absorbent core, reducing their effectiveness in maintaining good body contact and preventing clothing and body soiling.
Innovation Solution
A sanitary absorbent article with a rubber-based adhesive attachment means on the backsheet, containing between 1% and 5% low molecular weight components with a weight average molecular weight of 400-700 Daltons, applied in a pattern to secure the article to an undergarment, minimizing migration into the absorbent core.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive attachment means is used to secure the absorbent article to the undergarment, then the article maintains good body contact and prevents soiling, but the adhesive degrades over time due to temperature and oxygen exposure
Solution Approach 1:
The patent modifies the chemical composition parameters of the adhesive by incorporating specific antioxidants (such as hindered phenols and hindered amine light stabilizers) and UV absorbers. These additives change the chemical stability parameters of the adhesive formulation, enabling it to resist degradation from temperature, oxygen, and UV exposure while maintaining its bonding effectiveness throughout the product's service life.
2Reliability
If adhesive attachment means is used to secure the absorbent article, then the article maintains good body contact, but the adhesive can migrate through the film layer into the absorbent core reducing its effectiveness
Solution Approach 1:
The patent introduces a barrier layer or migration inhibitor as an intermediary between the adhesive and the absorbent core. This intermediary component prevents the adhesive from migrating into the core while allowing the adhesive to maintain its bonding function. The barrier layer acts as a mediator that blocks the migration pathway without interfering with the adhesive's ability to secure the article to the undergarment.
3Reliability
If adhesive degrades and migrates, then the adhesive effectiveness is reduced, but increasing adhesive amount may worsen migration and degradation issues
Solution Approach 1:
The patent optimizes the adhesive formulation by adjusting chemical composition parameters rather than increasing adhesive quantity. By incorporating stabilizers and modifying the polymer structure, the adhesive achieves equivalent or superior bonding strength at lower application rates, thereby reducing the total amount of adhesive present and minimizing both migration and degradation without compromising bonding performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances the adhesive's ability to maintain the absorbent article in place, reducing migration and degradation, thereby improving its effectiveness in preventing soiling and maintaining body contact.
Implementation Method 1
adhesive attachment means disposed on a garment faceable surface of the backsheet for securing the article to an undergarment
Data Source
AI summary
A sanitary absorbent article having a topsheet, a backsheet, an absorbent core comprising a high internal phase emulsion foam disposed between the topsheet and the backsheet, and from about 10 gsm to about 50 gsm of an adhesive attachment means disposed on a garment faceable surface of the backsheet for securing the article to an undergarment. The adhesive attachment means includes between about 0% and about 20% of a low molecular weight component, based on the total weight of the adhesive attachment means, wherein the low molecular weight component has a weight average molecular weight of between about 400 and about 700 Daltons and a kinematic viscosity measured at 40° C. of 68 CST. The adhesive attachment means is a rubber based resin.