Moldable Sand Composition Hardening and Re-wetting Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional moldable sand compositions for children's craft products tend to be greasy, sticky, and non-reusable, lacking the ability to harden and maintain shape while also being prone to cracking and staining.
Innovation Solution
A moldable sand composition comprising 70-95% sand, 5-30% water, a polar polymeric resin, a crosslinking agent, and a humectant, which hardens at room temperature and can be re-wetted for re-molding, eliminating oils, waxes, and greasy components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sand-based compositions contain oils, waxes, or rubber to improve moldability, then the composition becomes more moldable, but it produces a greasy or sticky feeling and risks staining clothes or the surrounding environment
Solution Approach 1:
The patent removes harmful oily components (oils, waxes, rubber) from the sand-based composition while retaining moldability through alternative water-soluble binders and polymeric resins. This extraction eliminates the greasy feeling and staining risk while preserving the essential molding function.
Solution Approach 2:
The patent changes the chemical composition parameters by substituting oil-based binders with water-based polymeric resins and crosslinking agents. This parameter change transforms the composition from oil-dependent to water-dependent, eliminating harmful effects while maintaining moldability through different chemical mechanisms.
2Stability of the object's composition
If sand-based compositions are designed to harden to maintain shape, then shape stability is improved, but they cannot be re-wetted and molded again
Solution Approach 1:
The patent creates a dynamic system where the composition can transition between moldable and hardened states multiple times. The reversible crosslinking mechanism allows the material to adapt between soft (moldable) and rigid (shape-stable) states, enabling repeated use cycles of molding, hardening, re-wetting, and re-molding.
Solution Approach 2:
The patent enables recovery of the moldable state after hardening by re-wetting the composition. The crosslinked structure can be rehydrated to restore moldability, allowing the material to be reused multiple times rather than being discarded after single use.
3Object-generated harmful factors
If water-based starch doughs are used to avoid greasiness, then staining risk is reduced, but they tend to break apart during molding and crack after drying
Solution Approach 1:
The patent creates a composite material system combining sand particles with water-soluble polymeric resins and crosslinking agents. This composite structure provides the structural integrity needed to prevent breaking during molding and cracking after drying, while maintaining the water-based non-staining properties of starch doughs.
Solution Approach 2:
The patent changes the binder parameters from simple starch dough to sophisticated water-soluble polymeric resins with crosslinking capabilities. This parameter change enhances structural integrity and resistance to breaking and cracking while preserving the non-staining, water-based characteristics.
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 provides a safe, non-staining, and reusable sand-like experience with a unique visco-elastic texture, maintaining shape upon hardening and regaining moldability with water addition, reducing environmental mess and ensuring user safety.
Implementation Method 1
a polar polymeric resin, a crosslinking agent
Implementation Method 2
capable of becoming hardened at room temperature over time in order to maintain the achieved shape
Implementation Method 3
a humectant
Implementation Method 4
exposing the composition to air for a period of time sufficient for it to become a hardened composition
Implementation Method 5
comprising between about 70% to about 95% sand
Data Source
AI summary
The present invention relates to moldable sand compositions, methods for making the moldable sand compositions, and methods for using the moldable sand compositions. In a particular embodiment, the moldable sand composition comprises between about 70% to about 95% sand, between about 5% to about 30% water, a polar polymeric resin, a crosslinking agent, and a humectant. In an exemplary embodiment, the composition contains no oils, waxes, glycols, or rubbers. The composition is capable of becoming hardened over time in order to maintain the achieved shape, and can be re-wetted and molded again after becoming hardened.