Polyether Block Amide Desiccant Polymer for Moisture Uptake and Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing polymer compositions used for moisture-sensitive products face challenges in achieving high moisture absorption capacity, mechanical stability, and flexibility while preventing desiccant leakage and maintaining processing ease, especially when incorporating high amounts of inorganic desiccants.
Innovation Solution
A polymer composition comprising a thermoplastic base polymer, such as polyolefins, combined with an inorganic desiccant material like molecular sieves and a polyether block amide additive, which enhances moisture uptake speed and mechanical stability without compromising processing or releasing additives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high amounts of inorganic desiccant filler are incorporated into the polymer composition, then moisture absorption capacity is improved, but mechanical properties are strongly modified with reduced flexibility and elongation at break
Solution Approach 1:
The patent optimizes the weight percentage range of inorganic desiccant filler (40-85 wt%) to achieve the desired balance between moisture absorption capacity and mechanical stability. By carefully controlling the filler content parameter, the composition achieves high moisture absorption while maintaining adequate mechanical properties for practical applications.
Solution Approach 2:
The patent creates a composite material system combining organic polymer matrix with inorganic desiccant filler particles. This composite structure allows the organic phase to provide mechanical flexibility and the inorganic phase to provide moisture absorption capacity, resolving the contradiction between these two properties through material composition design.
2Reliability
If inorganic desiccant material is entrained directly into plastic structure, then desiccant leakage is prevented, but moisture adsorption speed is reduced
Solution Approach 1:
The patent creates local regions of high desiccant concentration within the polymer matrix, allowing sufficient moisture absorption capacity while maintaining overall structural integrity. The desiccant particles are distributed throughout the plastic structure, creating local active sites for moisture adsorption without requiring complete coating of each particle.
Solution Approach 2:
The patent uses the polymer matrix as a binding medium that holds desiccant particles in place, effectively copying the containment function of separate containers while integrating the desiccant directly into the structural material. This eliminates the need for separate containment structures that would slow moisture access.
3Ease of manufacture
If desiccant is incorporated into material composition, then processing ease is improved, but additive migration may occur
Solution Approach 1:
The patent employs a polymer matrix system where the polymer itself serves as both the structural material and the binding medium for desiccant particles. This integrated approach eliminates the need for separate additives that could migrate, using the polymer matrix as a self-sufficient containment and structural system.
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 composition achieves rapid moisture absorption with maintained mechanical stability and ease of processing, suitable for moisture-sensitive product packaging, even in applications with mechanical stress, and reduces additive migration.
Implementation Method 1
an inorganic desiccant material, which acts on, interacts or reacts with moisture and thereby absorbs moisture
Implementation Method 2
a polyether block amide additive, which enhances moisture uptake speed
Data Source
Figure 1A~1B
Figure 1C~2
Figure 3A~3B
AI summary
The invention concerns a polymer composition, comprising: a thermoplastic base polymer, an inorganic desiccant material, preferably selected from the group comprising molecular sieves, zeolites, silica gel, clay, hydrate salts, metal oxides and mixtures thereof, and an additive. The invention also concerns a method of producing the polymer composition as well as an article of manufacture comprising the polymer composition. In addition, the invention concerns the use of a polyether block amide as an additive in a polymer composition comprising a base polymer and an inorganic desiccant material, preferably selected from the group comprising molecular sieves, zeolites, silica gel, clay, hydrate salts, metal oxides and mixtures thereof.