Battery Packaging Laminate for Slip-Stable Forming
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Solution Overview
Problem
Existing packaging materials for lithium-ion batteries face challenges in achieving stable formability and preventing white powder deposition during molding, leading to reduced productivity and inconsistent quality due to excessive fatty acid amide usage.
Innovation Solution
A molding packaging material comprising a substrate layer, a heat fusible resin layer with a fluoropolymer-based lubricant, and a metal foil layer, where the innermost layer contains a resin composition with a heat fusible resin, an anti-blocking agent, and a slip agent, and the fluoropolymer-based lubricant has a content rate of 5 ppm to 5,000 ppm, improving slipperiness and reducing white powder adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a sufficient amount of fatty acid amide is added to improve slipperiness, then formability is improved, but white powder deposits on the molding surface causing productivity loss
Solution Approach 1:
The patent changes the chemical composition parameters of the inner sealant layer by incorporating specific components (polyester resin with specific hydroxyl value range, polyolefin resin with specific melting point range, and controlled fatty acid amide content) to achieve optimal slipperiness while preventing excessive fatty acid amide deposition that causes white powder formation
Solution Approach 2:
The patent creates a composite resin composition in the inner sealant layer by combining polyester resin and polyolefin resin in specific proportions, along with controlled amounts of fatty acid amide, to achieve synergistic effects that improve formability while suppressing white powder deposition
2Object-generated harmful factors
If the additive amount of fatty acid amide is adjusted to suppress white powder, then white powder adhesion is reduced, but formability deteriorates
Solution Approach 1:
The patent optimizes the fatty acid amide content parameter within a specific range (0.1-5 parts by mass per 100 parts of total resin) and adjusts the hydroxyl value and melting point parameters of the resin components to achieve the right balance between suppressing white powder and maintaining formability
Solution Approach 2:
The patent uses a composite of polyester resin and polyolefin resin where the interaction between these materials and controlled fatty acid amide creates a system that provides adequate slipperiness for formability while limiting excessive fatty acid amide migration that causes white powder
3Object-generated harmful factors
If various adjustments are made for additive amount and aging conditions, then white powder can be suppressed, but quality stability becomes difficult to ensure due to variation in slip agent bleed
Solution Approach 1:
The patent establishes specific parameter ranges for resin properties (hydroxyl value 15-50, melting point 100-150°C) and compositional ratios that create a stable system where fatty acid amide bleed is controlled and consistent, reducing variation in both white powder deposition and formability
Solution Approach 2:
The patent incorporates aging treatment as a feedback mechanism to pre-condition the packaging material, allowing the resin composition to stabilize and fatty acid amide to distribute uniformly before molding, thereby reducing variation in subsequent production
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 enhances moldability and formability by maintaining stable slipperiness during molding, even with reduced slip agent bleed, and minimizes white powder deposition on the packaging material surface, thereby improving productivity and quality.
Implementation Method 1
an innermost layer of the heat fusible resin layer is made of a resin composition containing a heat fusible resin, an anti-blocking agent, a slip agent, and a fluoropolymer-based lubricant
Implementation Method 2
a heat fusible resin layer (an inner sealant layer)
Data Source
AI summary
Provided is a molding packaging material which is capable of ensuring good slipperiness to secure good formability when molding the molding packaging material and is less likely to cause white powder on a surface of the packaging material. The molding packaging material includes a substrate layer 2 as an outer layer, a heat fusible resin layer 3 as an inner layer, and a metal foil layer 4 arranged between the two layers. The heat fusible resin layer 3 is composed of a single layer or a multi-layer. The innermost layer of the heat fusible resin layer 3 is made of a resin composition containing a heat fusible resin, an anti-blocking agent, a slip agent, and a fluoropolymer-based lubricant.