Multilayer Polyethylene Film Blocking Reduction via SOFA Slip Agents
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Solution Overview
Problem
Multilayer polyethylene films experience high blocking, which leads to adherence issues between adjacent film surfaces, slowing down the packaging process and affecting aesthetic qualities.
Innovation Solution
Incorporating saturated organic fatty amides (SOFA) as slip agents in the core or skin layers of multilayer polymer films to reduce blocking, with effective amounts of SOFA slip agents such as behenamide, either alone or in combination with unsaturated organic fatty amides, to minimize film adherence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional multilayer polyethylene films are used without SOFA slip agents, then the film structure remains simple and manufacturing costs are lower, but blocking is high causing adherence issues between adjacent film surfaces
Solution Approach 1:
The patent changes the chemical composition parameter by introducing saturated organic fatty amides (SOFA) slip agents into the multilayer polyethylene film structure. This parameter change reduces blocking from high levels to equal to or less than about 75 grams, resolving the technical contradiction between maintaining simple film structure and reducing blocking.
2Productivity
If high levels of blocking are present in multilayer polyethylene films, then film strength and aesthetic qualities are maintained, but the packaging process speed decreases due to adherence issues
Solution Approach 1:
The patent modifies the chemical composition by adding SOFA slip agents, which changes the surface properties and reduces blocking to equal to or less than about 75 grams. This enables high-speed automated packaging processes to proceed without interruption from blocking-related adherence issues, thereby improving productivity.
3Object-affected harmful factors
If unsaturated organic fatty amides are used as slip agents, then blocking is reduced, but wax migration to the film surface occurs affecting aesthetic qualities
Solution Approach 1:
The patent changes the chemical structure parameter from unsaturated organic fatty amides to saturated organic fatty amides (SOFA). This parameter change reduces blocking while preventing wax migration to the film surface, thereby maintaining aesthetic qualities and surface appearance.
Solution Approach 2:
The patent uses saturated organic fatty amides that provide effective blocking reduction without the long-term degradation issues of unsaturated amides. The SOFA slip agents maintain their effectiveness without migrating to the surface and compromising aesthetic qualities.
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 SOFA slip agents significantly reduces blocking to levels equal to or less than 75 grams, enhancing the packaging process efficiency and maintaining aesthetic qualities without the need for additional antiblock agents or dusting.
Implementation Method 1
addition of saturated organic fatty amides, alone or in combination with unsaturated organic fatty amides, to reduce blocking
Data Source
AI summary
A multilayer polymer film comprising at least one core layer disposed between two skin layers, wherein at least one of the core layers, one of the skin layers, or both one of the core layers and one of the skin layers comprises a saturated organic fatty amide (SOFA) slip agent. A multilayer polymer film comprising an effective amount of a SOFA slip agent in at least one core layer such that the film exhibits blocking of equal to or less than about 75 grams. A method of packaging a product comprising providing a package fabricated from such films and placing the product in the package, wherein loose dust is not applied to the exterior of the package to reduce blocking. A method for the reduction of the presence of wax on the surface of a multilayer polymer film comprising adding a SOFA slip agent to a core layer of the film.