Ionomer Composition with Low Potassium Neutralization for Antistatic Packaging
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Solution Overview
Problem
Ionomers used in packaging tend to attract static charges, leading to dust accumulation and contamination, particularly in cosmetic and powdered food packaging, which affects appearance and usability, and existing antistatic resins with high potassium neutralization suffer from poor mechanical and thermal properties.
Innovation Solution
A composition comprising an ionomer with a reduced amount of potassium ions, neutralized with sodium, zinc, or magnesium ions, which reduces static charge buildup without compromising the ionomer's physical properties, achieved by blending or contacting potassium ions with sodium- or zinc-neutralized ionomers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high levels of potassium ions (up to 70% neutralized) are used in ionomers to achieve antistatic properties, then surface resistivity is reduced and static decay time is decreased, but mechanical properties deteriorate and thermal instability increases
Solution Approach 1:
The invention changes the neutralization parameter from high levels (70%) to low levels (0.1-10%), fundamentally altering the ionomer's electrical properties. This parameter change achieves the desired antistatic effect while preserving mechanical integrity, as the low neutralization level prevents excessive disruption of the polymer matrix
Solution Approach 2:
The invention creates a composite system by combining the ionomer with specific additives (waxes, oils, or surfactants) to achieve the desired antistatic properties. This composite approach allows the base ionomer to maintain its mechanical strength while the additive provides the electrical conductivity needed for antistatic performance
2Reliability
If high levels of potassium ions (up to 70% neutralized) are used in ionomers to achieve antistatic properties, then surface resistivity is reduced, but thermal stability deteriorates
Solution Approach 1:
The invention changes the neutralization parameter from high levels (70%) to low levels (0.1-10%), which preserves the thermal stability of the ionomer. The low neutralization level maintains the integrity of the polymer structure and its thermal properties, while still achieving the desired electrical conductivity through additives
Solution Approach 2:
The invention introduces intermediary substances (waxes, oils, or surfactants) that mediate between the ionomer and the electrical charge. These intermediaries provide the necessary electrical conductivity for antistatic performance without requiring high levels of ionic neutralization, thereby preserving thermal stability
3Strength
If conventional ionomers are used in packaging applications, then heat seal properties and toughness are maintained, but static charge buildup occurs leading to dust accumulation
Solution Approach 1:
The invention converts the typically harmful static charge buildup into a beneficial property by using low-level ionic neutralization combined with additives. This approach creates controlled electrical conductivity that prevents dust accumulation and static-related defects, transforming the ionomer from a statically-prone material to an antistatic packaging material while preserving toughness and heat seal properties
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 effectively reduces static charge buildup to levels similar to polyethylene, maintaining the ionomer's heat seal and mechanical properties, thus enhancing the ionomer's suitability for packaging applications while minimizing dust accumulation.
Implementation Method 1
Ionomers made with potassium ions exhibit antistatic properties for they reduce the surface resistivity and static decay times of the polymer
Implementation Method 2
An ionomer is produced by any means known to one skilled in the art by neutralization of an ethylene acid copolymer with one or more metal ions
Data Source
AI summary
A composition and an article comprising or produced from the composition are disclosed. The composition comprises an ionomer and a reducing static charge-buildup amount of potassium ion wherein the ionomer is neutralized with sodium, zinc, or magnesium ions. The article can be a film including a multilayer film.