Layered Enzyme Granules with Plasticized Matrix for Dust Control
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Solution Overview
Problem
Existing enzyme formulations face challenges in minimizing dust release during mechanical stress, which can lead to irritation and allergenic reactions, and current methods either require complex processes or result in low yields of desired particle sizes.
Innovation Solution
A layered granule design featuring a core surrounded by a matrix layer comprising a biological active and a non-volatile liquid, applied using a fluidized bed spray coater, which reduces dust release upon mechanical stress exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If solid formulations are used to improve enzyme stability, then stability is improved, but dust release increases under mechanical stress
Solution Approach 1:
The invention uses a composite material system consisting of a polymer matrix combined with a plasticizer to create granules that maintain solid formulation stability while reducing dust release. The polymer provides structural integrity and enzyme stability, while the plasticizer modifies the matrix properties to reduce dusting under mechanical stress, thus resolving the contradiction between stability and dust generation.
Solution Approach 2:
The invention changes the physical-chemical parameters of the formulation by incorporating a plasticizer that modifies the glass transition temperature and mechanical properties of the polymer matrix. This parameter change allows the material to maintain stability while becoming less prone to dust release under stress, effectively resolving the contradiction.
2Object-generated harmful factors
If liquid formulations are used to reduce dust formation, then dust release is reduced, but enzyme stability deteriorates
Solution Approach 1:
The invention utilizes phase transition principles by maintaining the formulation in a solid granule state that behaves in a liquid-like manner under stress due to the plasticizer. The polymer matrix remains solid for stability, while the plasticized regions provide liquid-like flexibility to prevent dust release, thus resolving the contradiction between dust reduction and stability.
3Object-generated harmful factors
If plasticized coating is applied to reduce dust emission, then dust release is reduced, but manufacturing complexity increases
Solution Approach 1:
The invention merges the polymer matrix and plasticizer into a single integrated granule formulation rather than applying a separate plasticized coating layer. This combining of functions into one material system reduces manufacturing complexity while maintaining the dust emission reduction benefits, resolving the contradiction between dust control and process simplicity.
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 granule design effectively minimizes enzyme dust release even under mechanical stress, providing a safer and more stable form of biological actives for use in detergents and other applications.
Implementation Method 1
making mechanical robust granules by impregnating (absorbing) a plasticizer onto a coating/surface containing a plasticizable polymer
Implementation Method 2
applied using a fluidized bed spray coater (fluid-bed coating)
Data Source
AI summary
The invention provides layered granules comprising a core and a matrix coating surrounding the core. The matrix comprises a biological active and a non-volatile liquid, and may be applied using a fluidized bed spray coater (fluid-bed coating). The granules exhibit reduced release of biological active dust, such as enzyme dust, after subjecting the granules to mechanical stress.