Water-Soluble Pouch Sealing for Symmetric Multi-Depth Compartments

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Solution Overview

Problem

Existing methods for manufacturing water-soluble pouches often result in asymmetrically positioned double films and uniform compartment heights, limiting versatility, aesthetics, and functionality, particularly in applications requiring varying dosages or ingredient separation.

Innovation Solution

A process involving the feeding of a first water-soluble film onto a continuously moving surface, forming open pouches, filling them, and sealing with a second film at controlled temperatures and pressures to achieve symmetrical compartments relative to the sealing plane.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional methods are used to form pouches by feeding film onto a continuously moving surface, then production efficiency is maintained, but the first and second water-soluble films become asymmetrically positioned relative to the sealing plane

Engineering Contradiction:

Improveproduction efficiencyVSAvoidfilm symmetry relative to sealing plane

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent inverts the conventional approach by forming pouches on a stationary surface rather than moving the film along a continuously moving surface. This reversal allows precise positioning of films relative to the sealing plane while maintaining production efficiency through batch processing of multiple pouches simultaneously.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent applies preliminary positioning actions by pre-aligning the first and second water-soluble films on the stationary surface before sealing. This preliminary arrangement ensures symmetric positioning relative to the sealing plane is achieved before the actual sealing process begins.

Inventive Principle:

Principle #10Preliminary action

2Ease of manufacture

If uniform compartment heights are used in water-soluble pouches, then manufacturing simplicity is maintained, but versatility and aesthetics are limited for applications requiring varying dosages or ingredient separation

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidcompartment depth variation capability

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent applies local quality by allowing different compartments within the same pouch to have different depths while maintaining uniform manufacturing processes. Each compartment can be customized with specific depth requirements to accommodate varying dosages or ingredient separation needs, while the overall manufacturing approach remains simple and consistent.

Inventive Principle:

Principle #3Local quality

3Device complexity

If asymmetric double films are positioned in pouches, then production complexity is reduced, but aesthetics and functionality are compromised

Engineering Contradiction:

Improvepouch formation complexityVSAvoidaesthetics and symmetry of pouch

Core Design Contradiction:

Device complexityVSShape

Solution Approach 1:

The patent inverts the conventional asymmetric approach by deliberately positioning both the first and second water-soluble films to be symmetric relative to the sealing plane. This symmetric arrangement enhances aesthetics and functionality without significantly increasing production complexity, as it is achieved through proper alignment during the stationary pouch formation process.

Inventive Principle:

Principle #13The other way round (Inversion)

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 process enables the production of aesthetically pleasing, versatile water-soluble pouches with varying compartment depths and reduced film residue, enhancing functionality and applicability across sectors like household cleaning and personal care.

Implementation Method 1

heating the first water-soluble film to a first water soluble film heating temperature and forming from the first heated water-soluble film on the horizontal or non-horizontal portion of the continuously moving surface, and in the moulds on the surface, a continuously moving, horizontally or non-horizontally positioned web of open pouches, by applying an under pressure

Methodology Applied

Scientific EffectHeating: Heating

Implementation Method 2

heating a second water-soluble film to a second water-soluble film heating temperature and continuously sealing the web of open pouches, by feeding the second heated water-soluble film onto the horizontally or non-horizontally positioned web of open, filled pouches

Methodology Applied

Scientific EffectHeating: Heating

Data Source

PatentUS20250376648A1Process for making water-soluble pouches

Publication Date: 2025.12.11 PROCTER & GAMBLE CO

AI summary

A process for making water-soluble pouches having at least one compartment on a sealing plane is disclosed. The process is characterized by the difference in the first water-soluble film heating temperature and the second water-soluble film heating temperature being reduced substantially. The resulting water-soluble pouch comprises of almost symmetrically shaped individual compartments relative to the sealing plane respectively and optionally with different depth of each compartment enabling stereoscopic and contemporary appearance to the consumer.