Sealing Insert Lubricant System for Food Vessel Closures
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sealing inserts for vessel closures, particularly those used for food and beverages, face challenges with lubricants that are unsuitable for reducing friction and are prone to photochemical and oxidative degradation, such as erucamide and oleic acid amides, which are not effective in maintaining stability and performance over time.
Innovation Solution
A lubricant system comprising at least one branched primary fatty acid amide, specifically isooctadecanamide, which is added to the sealing insert rather than the closure material, providing enhanced stability and reduced friction, with a composition of over 50% by weight of saturated branched primary fatty acid amides to improve rotational resistance and prevent oxidative breakdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional lubricants like erucamide or oleic acid amide are used in sealing inserts, then friction is reduced and opening is facilitated, but the lubricants are prone to photochemical and oxidative degradation, compromising long-term stability
Solution Approach 1:
The patent changes the chemical parameters of the lubricant by selecting saturated branched primary fatty acid amides (iso C18-C28) instead of unsaturated straight-chain fatty acid amides. This parameter change eliminates double bonds that are susceptible to oxidation, while maintaining the lubricating function through the branched saturated structure.
Solution Approach 2:
The sealing insert comprises a composite material system combining the polymer matrix with specific lubricant additives (saturated branched primary fatty acid amides). This composite approach integrates the sealing function of the polymer with the lubricating function of the amide, creating a material that simultaneously provides both sealing and ease of opening while resisting degradation.
2Ease of operation
If lubricants are added to the closure material, then friction reduction is achieved, but the lubricant may migrate or degrade, affecting performance over time
Solution Approach 1:
The lubricant (saturated branched primary fatty acid amide) is pre-mixed into the sealing insert material before the closure assembly is put into service. This preliminary incorporation ensures the lubricant is positioned exactly where it is needed at the sealing interface, providing immediate friction reduction while the stable saturated structure prevents later migration or degradation.
3Ease of operation
If unsaturated fatty acid amides are used as lubricants, then initial friction reduction is effective, but oxidative breakdown occurs over time, reducing long-term performance
Solution Approach 1:
The patent fundamentally changes the chemical structure parameter from unsaturated to saturated fatty acid amides. The saturated structure eliminates the reactive double bonds that cause oxidative degradation, thereby extending the duration of lubricant effectiveness indefinitely under normal storage conditions, while the branched structure maintains effective friction reduction.
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 use of isooctadecanamide in sealing inserts significantly reduces rotational resistance and prevents oxidative degradation, offering superior performance compared to traditional lubricants like behenamide and oleic acid amide, while being cost-effective and stable, thus ensuring effective sealing and ease of opening without excessive force.
Implementation Method 1
substances have long been used that reduce friction and thereby act as a lubricant
Implementation Method 2
These are often provided as plastisols, which are introduced in liquid form into a closure blank and then dried into the shape of the desired seal
Data Source
Figure 1~2
AI summary
The invention relates to a sealing insert for the closure of a vessel for accommodating food, beverages and the like, which comprises a polymer compound containing at least one polymer and a lubricant, the lubricant comprising at least one branched primary fatty acid amide.