Polyolefin Resin Modifier for Antifogging and Extrusion Stability
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Solution Overview
Problem
Polyolefin-based resin films used in food packaging are hydrophobic, leading to fogging due to moisture evaporation, and existing modifiers can cause vent flow and blocking issues during manufacturing, affecting their manufacturability and handling.
Innovation Solution
A modifier for polyolefin-based resin comprising a diester and a monoester, along with a nonionic surfactant, which enhances antifogging properties and improves manufacturability by minimizing extrusion variations and reducing blocking issues during storage and handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional modifier is blended in high concentration to achieve excellent antifogging properties, then the antifogging performance is improved, but vent flow and blocking issues occur during manufacturing and handling
Solution Approach 1:
The patent changes the chemical parameters of the modifier by specifying precise molecular structures with controlled carbon atom numbers (R1-R6 groups) and molecular weight ranges (200-5000). This parameter optimization allows the modifier to achieve excellent antifogging properties at lower concentrations, preventing vent flow and blocking while maintaining reliability
Solution Approach 2:
The patent creates a composite modifier system combining multiple components: a polyolefin-based resin, a specific ester compound (Formula 1), and a polyol compound (Formula 2). This composite approach synergistically improves both antifogging performance and manufacturability, as each component contributes different functional properties that together resolve the contradiction
2Duration of action of stationary object
If a modifier is stored for extended periods to ensure supply stability, then the availability is improved, but blocking of the masterbatch occurs during storage
Solution Approach 1:
The patent optimizes the molecular weight parameter of the modifier (200-5000 range) and the carbon atom numbers of hydrocarbon groups (5-21 atoms) to achieve a balance between storage stability and handling properties. This parameter control prevents the modifier from bleeding out and blocking the masterbatch during extended storage while maintaining availability
Solution Approach 2:
The patent employs a modifier with controlled molecular characteristics that maintains stability during storage without requiring excessive stabilization measures. The optimized structure allows the modifier to remain effective for the necessary storage period without degrading or causing blocking, eliminating the need for complex preservation systems
3Stability of the object's composition
If the hydrophobic nature of polyolefin-based resin is maintained for chemical stability, then the resin stability is improved, but moisture evaporation causes fogging on the film surface
Solution Approach 1:
The patent creates a composite system where the hydrophobic polyolefin-based resin is combined with amphiphilic modifier molecules (Formulas 1 and 2) that have both hydrophobic (R1-R6 hydrocarbon groups) and hydrophilic ((poly)oxyalkylene groups) portions. This composite structure maintains the resin's chemical stability while the modifier components provide antifogging functionality by controlling moisture behavior on the film surface
Solution Approach 2:
The patent applies local quality modification by introducing modifier molecules with specific local structures (hydrophobic R groups and hydrophilic oxyalkylene groups) at the film surface. This localized modification allows the bulk resin to maintain its hydrophobic stability while the surface exhibits antifogging properties through controlled moisture interaction
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 proposed modifier provides excellent antifogging properties and improved manufacturability by stabilizing extrusion and reducing vent flow and blocking, resulting in uniform film thickness and enhanced handling characteristics.
Implementation Method 1
a modifier for polyolefin-based resin that can give excellent antifogging properties and manufacturability to polyolefin-based resin films
Implementation Method 2
R1 and R3 are each a hydrocarbon group having 5 to 21 carbon atoms; and R2 is a residue with all hydroxy groups removed from (poly)oxyalkylene glycol having 2 to 100 carbon atoms
Data Source
AI summary
Provided is a modifier for polyolefin-based resin, which includes a compound (A) represented by Formula (1) of R1—COO—R2—OCO—R3; and a compound (B) represented by Formula (2) of R4—COO—R5—OH; where R1 and R3 are each a hydrocarbon group having 5 to 21 carbon atoms; and R2 is a residue with all hydroxy groups removed from (poly)oxyalkylene glycol having 2 to 100 carbon atoms and having, in a molecule thereof, a (poly)oxyalkylene group composed of oxyalkylene units having 2 to 4 carbon atoms, and where R4 is a hydrocarbon group having 5 to 21 carbon atoms; and R5 is a residue with all hydroxy groups removed from (poly)oxyalkylene glycol having 2 to 100 carbon atoms and having, in a molecule thereof, a (poly)oxyalkylene group composed of oxyalkylene units having 2 to 4 carbon atoms.