Pearlescent Container Using Immiscible Siloxane Fluid
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Solution Overview
Problem
Existing pearlescent containers made from thermoplastic materials face issues such as reduced surface smoothness, unwanted weld and flow lines, and compromised recyclability due to the use of particles like mica and glass fibers, and processing difficulties with thermoplastic material combinations.
Innovation Solution
A pearlescent container is created using a thermoplastic material with a Total Luminous Transmittance value of at least 80% and a siloxane fluid with a viscosity of no greater than 1,000,000 cst, forming an immiscible lamellar structure with a Refractive Index difference of at least 0.1, which is blow molded to achieve a pearlescent appearance without the drawbacks of prior methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If particles such as mica, aluminum oxide, silicon dioxide, or glass fibers are mixed with thermoplastic materials to achieve a pearlescent appearance, then the container surface exhibits a desirable pearlescent effect, but the surface smoothness deteriorates and unwanted weld lines and flow lines appear
Solution Approach 1:
The invention changes the physical state of the siloxane from solid particles to fluid form, and controls its viscosity parameter (no greater than 1,000,000 cst) to enable it to flow and distribute uniformly during processing, eliminating surface defects while maintaining pearlescent appearance
Solution Approach 2:
The invention creates a composite material system consisting of thermoplastic material and siloxane fluid that are immiscible but form a stable dispersion. The refractive index difference (at least 0.1) between the two components generates the pearlescent effect without the need for solid particles
2Illumination intensity
If particles such as mica, aluminum oxide, silicon dioxide, or glass fibers are incorporated into thermoplastic materials to create a pearlescent container, then the container surface achieves a pearl-like appearance, but the container strength deteriorates due to weld lines and flow lines
Solution Approach 1:
The invention changes the siloxane from solid particle form to fluid form with controlled viscosity, allowing it to be uniformly distributed in the melt without creating weak points. The fluid siloxane does not interfere with the welding of melt fronts, thereby maintaining container strength
Solution Approach 2:
The invention extracts the harmful solid particle component from the system and replaces it with siloxane fluid, which provides the desired optical effect without compromising the mechanical integrity and weldability of the thermoplastic material
3Illumination intensity
If combinations of thermoplastic materials are used to provide a pearl gray or pearl-like appearance, then the container achieves a pearlescent effect, but processing difficulties arise due to un-matching melting points requiring compatibilizers
Solution Approach 1:
The invention changes the approach from using multiple thermoplastic materials with different melting points to using a single thermoplastic material combined with siloxane fluid. This simplifies the processing conditions and eliminates the need for compatibilizers while maintaining the pearlescent appearance
Solution Approach 2:
The siloxane fluid acts as an intermediary that provides the pearlescent effect without requiring complex multi-material blends. It disperses uniformly in the thermoplastic melt and does not interfere with the processing of the base thermoplastic material
4Illumination intensity
If chemically active thermoplastic materials such as methacrylic are used in combinations to achieve a pearlescent appearance, then the container exhibits desired aesthetic properties, but the container stability deteriorates
Solution Approach 1:
The invention extracts the chemically active components from the material combination and replaces them with siloxane fluid, which is chemically inert. This eliminates stability issues while maintaining the pearlescent appearance through the refractive index difference between the siloxane and thermoplastic material
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 solution results in a container with improved glossiness, reduced weld and flow lines, and enhanced surface smoothness, while maintaining recyclability and aesthetic appeal, through the formation of a lamellar structure that produces a light interference effect, similar to natural pearls.
Implementation Method 1
The pearlescent effect of the container surface disclosed herein is achieved by the light interference effect on such particles
Implementation Method 2
have a Refractive Index difference of at least about 0.1
Data Source
AI summary
A pearlescent container comprising about 86% to about 99.99% of a thermoplastic material having a Total Luminous Transmittance value of at least about 80%, about 0.01% to about 5% of a siloxane fluid having a viscosity of no greater than about 1,000,000 cst, wherein said thermoplastic material and said siloxane fluid are immiscible, forms a lamellar structure, and have a Refractive Index difference of at least about 0.1.