Pet Waste Absorption Sheet With Apertured Film And Line Adhesive

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Solution Overview

Problem

Existing pet waste absorption sheets face issues with liquid migration due to nonwoven fabric topsheets, which can lead to urine being left on the surface and discomfort for pets, and hot-melt adhesives interfering with liquid passage.

Innovation Solution

A pet waste absorption sheet featuring a resin film topsheet with apertures and hot-melt type adhesive applied in continuous lines, such as spiral or wavy patterns, to ensure effective liquid migration to the absorbent core while maintaining contact and preventing adhesive blockage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a nonwoven fabric is used as the topsheet, then the topsheet can be bonded to the absorbent core, but the pet claws are liable to catch in fibers and the nonwoven fabric feels wet after absorption

Engineering Contradiction:

Improvebonding between topsheet and absorbent coreVSAvoidpet discomfort from wet feeling and claw catching

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the nonwoven fabric topsheet with a thin film topsheet that has liquid-permeable properties. This thin film structure prevents pet claws from catching in fibers while allowing liquid to pass through to the absorbent core, eliminating the wet feeling on the surface.

Inventive Principle:

Principle #30Flexible shells and thin films

2Reliability

If a hot-melt sheet is melted between the topsheet and absorbent core to bond them, then the layers are kept in contact, but the hot-melt interferes with liquid migration from topsheet to absorbent core

Engineering Contradiction:

Improvecontact between topsheet and absorbent coreVSAvoidliquid migration speed from topsheet to absorbent core

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent removes the hot-melt sheet that was previously used for bonding. Instead, it uses a hot-melt adhesive applied in continuous lines with curved portions, which bonds the thin film topsheet to the absorbent core without interfering with liquid migration through the apertures.

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If a hot-melt type adhesive is sprayed over the topsheet or absorbent core, then the layers are bonded, but the adhesive takes the form of fibers and blocks liquid passage

Engineering Contradiction:

Improvebonding between topsheet and absorbent coreVSAvoidliquid passage through topsheet

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies the hot-melt adhesive in continuous lines with curved portions rather than spraying it uniformly. This localized application ensures bonding in specific areas while leaving the apertures open for liquid passage, preventing the adhesive from forming blocking fibers across the entire surface.

Inventive Principle:

Principle #3Local quality

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 allows for quick absorption of urine by the absorbent core, preventing it from being left on the surface and ensuring a comfortable experience for pets, with the hot-melt adhesive pattern optimizing liquid passage and contact between layers.

Implementation Method 1

the topsheet being bonded to the absorbent core through a hot-melt type adhesive

Methodology Applied

Scientific EffectHot-melt adhesive bonding: Melting

Implementation Method 2

liquid such as urine applied to the topsheet can readily pass through the apertures and migrate to the absorbent core

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Data Source

PatentUS8101815B2Pet waste absorption sheet

Publication Date: 2012.01.24 UNI CHARM CORP

AI summary

A pet waste absorption sheet includes a liquid-impermeable backsheet, a liquid-permeable topsheet, and an absorbent core disposed between the backsheet and the topsheet. The topsheet is a resin film formed with a plurality of apertures for passage of liquid. The topsheet is bonded to the absorbent core through a hot-melt type adhesive. The hot-melt type adhesive is applied in a plurality of continuous lines including curved portions.