Laundry care additive particles
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Solution Overview
Problem
Laundry care particle additives and dryer sheets with perfume capsules face issues of inconsistent perfume leakage due to different perfume raw materials leaking at varying rates, leading to undesirable olfactory experiences and quality control problems.
Innovation Solution
The use of water-soluble carriers with capsules having a core and a shell comprising a substantially inorganic material, specifically a condensed layer and a nanoparticle layer, where the shell is composed of a condensation product of a precursor, primarily silicon, titanium, or aluminum-based compounds, providing consistent perfume release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polymeric capsule shells (aminoplast, polyurea, polyacrylate) are used to encapsulate perfume raw materials, then the capsules can deliver perfume benefit to fabric, but different perfume raw materials leak at different rates through the capsule wall causing inconsistent perfume release
Solution Approach 1:
The invention changes the fundamental parameter of capsule shell material from organic polymeric materials to inorganic materials (silica, glass, metal oxides). This material parameter change creates a more uniform and predictable leakage profile across different perfume raw materials, resolving the inconsistency problem where different PRMs leaked at different rates through polymeric shells.
Solution Approach 2:
The capsule shell is constructed as a composite material system comprising inorganic base materials (silica, glass, metal oxides) with controlled porosity and surface properties. This composite structure provides both the mechanical integrity needed for capsule formation and the controlled permeability characteristics that enable consistent perfume release across multiple touchpoints.
2Ease of operation
If capsules are designed to rupture at various touchpoints for perfume release, then perfume delivery to fabric is achieved, but perfume capsules leak prematurely during transport and storage
Solution Approach 1:
The inorganic capsule shells are pre-formed with specific mechanical strength and structural integrity before being filled with perfume raw materials. This preliminary structuring ensures that capsules maintain their integrity during transport and storage, preventing premature rupture while still allowing controlled release at intended touchpoints during product use.
Solution Approach 2:
The invention adjusts the mechanical and structural parameters of the capsule shell by using inorganic materials with controlled wall thickness, density, and cross-linking. These parameter changes create a shell that is sufficiently robust to prevent leakage during storage yet capable of controlled rupture during product application, resolving the contradiction between storage stability and release functionality.
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
This solution ensures consistent perfume leakage rates, maintaining the intended scent profile and enhancing consumer satisfaction by controlling perfume release through the use of highly crosslinked inorganic shells.
Implementation Method 1
different PRMs may leak at different rates through the capsule wall
Implementation Method 2
said condensed layer comprises a condensation product of a precursor
Data Source
AI summary
Laundry care additive particles and a dryer sheet that include a water soluble carrier and capsules characterized by substantially inorganic shells, for example silica-based shells. The present disclosure further relates to methods of making and using such compositions.