Porous Polyester Unit Dose for Laundry
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Solution Overview
Problem
Current laundry cleaning methods require separate addition of detergents and fabric softeners in washing machines and dryers, leading to inconvenience and inefficiency, with existing unit doses suffering from incomplete solubilization and waste issues.
Innovation Solution
A 2-in-1 unit dose comprising a polyester receptacle with permeable pores and a solid fabric cleaning agent, coated with a softening agent, that dissolves during the wash cycle and releases softening effects during the dry cycle, eliminating the need for separate detergent and softener additions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate detergent and softener containers are used, then cleaning and softening functions can be provided, but consumer convenience deteriorates due to multiple steps and scheduling requirements
Solution Approach 1:
The patent combines detergent and fabric softener into a single unit dose product. The detergent component is enclosed in a water-soluble capsule that dissolves during the wash cycle, while the fabric softener is applied to the exterior surface of the same capsule. This merging eliminates the need for separate containers and multiple addition steps, directly improving consumer convenience while reducing product complexity.
Solution Approach 2:
The unit dose capsule serves multiple functions simultaneously: it acts as a container for the detergent, provides the detergent function through dissolution, and delivers the fabric softener function through its coated exterior. This multi-functionality allows a single product to replace multiple separate laundry care products, improving ease of operation.
2Ease of operation
If liquid detergent and softener are used, then cleaning and softening can be achieved, but shipping costs and energy consumption increase due to large quantities of inactive liquids
Solution Approach 1:
The patent changes the physical state of the detergent from liquid to solid powder form, and encloses it in a water-soluble capsule. This parameter change eliminates the need for large quantities of inactive liquid carriers that are required in liquid detergents. The solid powder formulation significantly reduces shipping weight and energy consumption while maintaining cleaning effectiveness.
Solution Approach 2:
The water-soluble capsule is made from a porous or mesh-like material that allows water to penetrate and dissolve the detergent powder inside during the wash cycle. This porous structure enables the solid detergent to be delivered effectively without requiring liquid carriers, reducing shipping energy while maintaining product effectiveness.
3Ease of operation
If PVA film is used to encapsulate detergent, then unit dose delivery is achieved, but solubilization completeness deteriorates leaving PVA films in the washing machine
Solution Approach 1:
The patent uses a water-soluble capsule made from inexpensive, biodegradable materials such as starch or cellulose instead of durable PVA film. These materials are designed to completely dissolve in water, leaving no residual film in the washing machine. The capsule is intended for single-use and complete dissolution, eliminating the reliability issue of incomplete solubilization while maintaining unit dose convenience.
Solution Approach 2:
The capsule is made from composite materials combining water-soluble polymers such as starch and cellulose. These composite materials provide the necessary structural integrity to contain the detergent during handling and shipping, while ensuring complete solubilization in water during the wash cycle, eliminating PVA film residues.
4Ease of operation
If separate softening step is added to washing machine cycle, then fabric softening can be achieved, but loss of time increases due to additional rinsing requirements
Solution Approach 1:
The patent merges the detergent and fabric softener delivery into a single unit dose product that is added once at the beginning of the wash cycle. The detergent dissolves during washing while the softener coats the capsule exterior and is transferred to fabrics during the same cycle, eliminating the need for a separate softening step and additional rinsing time.
Solution Approach 2:
The fabric softener is pre-applied to the exterior surface of the detergent capsule before use. This preliminary action ensures that the softener is already in position to be transferred to the fabrics during the wash cycle, eliminating the need for a separate softening step and reducing overall wash cycle time.
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
Provides convenient, eco-friendly, and cost-effective detergency and softening to fabrics in a single step, reducing waste and simplifying the laundry process.
Implementation Method 1
the polyester receptacle includes a plurality of pores permeable to liquid such that polyester receptacle allows liquid to diffuse into the cavity through the pores and dissolve the fabric cleaning agent
Implementation Method 2
the polyester receptacle is coated with a softening agent... during the drying cycle the softening agent is consumed for providing a softening effect onto the fabrics
Data Source
AI summary
Provided herein are 2-in-1 unit doses for treating fabrics. The 2-in-1 unit doses include a polyester receptacle coated with a softening agent, and a fabric cleaning agent disposed within the polyester receptacle. The polyester receptacle includes a plurality of pores permeable to liquid such that polyester receptacle allows liquid to diffuse into the cavity through the pores and dissolve the fabric cleaning agent. The 2-in-1 unit doses provide both softening and detergency to fabrics through a wash cycle in a washing machine and a heated dry cycle in a dryer.