Container having superior slide properties for fluid content
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Solution Overview
Problem
Current plastic containers for viscous fluid contents, such as sauces and mayonnaise, do not adequately exhibit slipping properties, leading to adhesion issues and inefficient discharge, despite previous attempts to improve chemical compositions and additives.
Innovation Solution
A container with an inner surface formed from a resin composition blended with a lubricating liquid, such as silicone oil or glycerin fatty acid ester, which segregates to create a lubricating layer, enhancing slipping properties by forming a liquid-liquid interface and maintaining a covering ratio of 0.35 to 0.91, and having a surface roughness of 80 nm to 200 nm, ensuring continuous lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional thermoplastic resin compositions are used for the inner surface of containers, then the container structure is simple and easy to manufacture, but the slipping property for viscous fluid contents is insufficient
Solution Approach 1:
The patent applies composite materials by combining a thermoplastic resin with a specific additive (having HLB ≤ 5.0) to create a resin composition that exhibits both structural integrity and superior slipping properties. This composite approach allows the inner surface to have dual functionality: maintaining container strength while providing excellent parting and slipping characteristics for viscous contents.
Solution Approach 2:
The patent changes the chemical composition parameters of the resin by incorporating an additive with specific HLB value (≤ 5.0) at controlled amounts (0.3-3 parts by weight per 100 parts resin). This parameter modification transforms the surface properties of the resin to achieve enhanced slipping property without fundamentally changing the container structure.
2Reliability
If lubricating agents are blended into the resin composition, then the slipping property is improved to some extent, but the improvement is limited due to constraints on resin types and additives
Solution Approach 1:
The patent overcomes additive selection constraints by defining a specific parameter range for the lubricating agent (HLB ≤ 5.0) rather than limiting to particular chemical compounds. This parameter-based approach allows versatility in additive selection while ensuring consistent slipping performance across different resin types and content formulations.
3Reliability
If the container is formed with a liquid-permeable surface holding a lubricating liquid, then the slipping property is very improved, but an additional step of applying liquid after formation is required
Solution Approach 1:
The patent applies preliminary action by incorporating the lubricating agent directly into the resin composition before container formation. This pre-mixing approach ensures the lubricating properties are built-in during the molding process, eliminating the need for post-formation liquid application steps and simplifying the manufacturing workflow.
Solution Approach 2:
The patent merges the resin matrix and lubricating agent into a single integrated resin composition. This combination allows the container to be formed in one step with inherent slipping properties, consolidating multiple functions (structural integrity and lubrication) into a single material system.
4Reliability
If the inner surface is made highly smooth to prevent adhesion, then the slipping property is improved, but the surface area for content contact is reduced
Solution Approach 1:
The patent changes the surface energy parameters of the inner surface by incorporating the low-HLB additive, which modifies the chemical composition rather than the physical topography. This allows the surface to maintain its full area while achieving reduced adhesion through altered surface chemistry, preserving both slipping property and contact area.
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 container achieves excellent slipping properties, allowing for quick and complete discharge of viscous contents without adhesion, maintaining lubrication stability even at high temperatures and during repeated use, with the lubricating liquid firmly adhered to the surface, preventing peeling and ensuring safety.
Implementation Method 1
a container surface that comes in contact with the content is formed of a resin composition that contains a forming-resin and a liquid selected from at least one of a silicone oil, a glycerin fatty acid ester, a liquid paraffin and an edible fat and oil... the liquid segregates to create a lubricating layer
Implementation Method 2
the lubricating liquid firmly adhered to the surface, preventing peeling and ensuring safety... the covering ratio F with the liquid is from 0.35 to 0.91
Data Source
Figure 1(a)~2(b)
Figure 3(a)~3(b)
Figure 4
AI summary
A container for containing fluid substance as a content, wherein a container surface that comes in contact with the content is formed of a resin composition that contains a forming-resin and an immiscible-liquid that is immiscible with the fluid substance. The container has markedly improved slipping property for the fluid contents and can be easily produced.