Slip-Resistant Polymer-Coated Folder Embossing
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Solution Overview
Problem
Existing file folders and hanging folders are prone to tearing when deep embossing is used to create slip-resistant surfaces, which limits the effectiveness of the embossing process and results in aesthetically undesirable tears.
Innovation Solution
The use of folder material stock comprising polymeric materials, such as polymer-coated paper or laminated films, which allows for deeper embossing without tearing by providing a polymer component that stretches and yields plastically to contain any tears, or by applying a polymer band or patch to minimize tear propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If deep embossments are applied to paper folders to create slip-resistant portions, then grip ability is improved, but paper tearing occurs during embossing
Solution Approach 1:
The patent applies a polymer coating (such as polyethylene, polypropylene, or PVC) to the paper folder stock, creating a composite material structure. This composite allows deep embossing to be applied without tearing because the polymer layer provides flexibility and tear resistance while the paper substrate maintains structural integrity. The embossed slip-resistant portions can be much deeper in polymer-coated stock compared to uncoated paper.
Solution Approach 2:
The patent changes the physical and chemical parameters of the folder material by coating it with polymer materials having specific properties (elongation at break, tensile strength, adhesion to paper). These parameter changes enable the material to withstand deep embossing deformation without tearing, while still providing the desired slip-resistant surface texture for improved grip.
2Ease of manufacture
If smooth paper stock is used for folders, then manufacturing is easier and cost is lower, but grip ability deteriorates
Solution Approach 1:
The patent modifies the surface parameters of the paper stock by applying polymer coatings with controlled surface textures and embossing patterns. This creates slip-resistant portions that maintain ease of manufacture (using standard coating and embossing processes) while dramatically improving grip ability through the textured surface that prevents slippage during handling.
3Manufacturing precision
If polymer coating is applied to paper stock, then embossing depth can be increased without tearing, but manufacturing complexity increases
Solution Approach 1:
The patent specifies particular polymer materials (polyethylene, polypropylene, PVC) and their properties (elongation, tensile strength, adhesion) that can be applied using existing coating equipment. This approach achieves precise embossing depth control without requiring fundamentally new manufacturing equipment, thereby limiting the increase in manufacturing complexity while enabling deeper embossing.
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
This solution enables the creation of slip-resistant folders that maintain durability and prevent paper tearing during the embossing process, enhancing grip without compromising the folder's structural integrity.
Implementation Method 1
the polymer component stretches and yields to absorb the deformation, maintaining the folder's integrity
Implementation Method 2
embossed portions that aid in gripping the top edge of such folders without slipping
Data Source
AI summary
A folder made from a roll of folder material stock. The folder has a front flap having a first top edge and a first width, and a rear flap connected to said front flap by a folder bottom, the rear flap having a second top edge and a second width. A slip-resistant portion is disposed on at least one of the flaps near said first or second top edge. The folder material stock comprises paper and a polymer material. A method of making the folder includes the steps of providing folder material stock comprising polymeric material, providing embossing dies in spaced, operable, mating relationship, positioning the folder material stock appropriately in the embossing dies, applying force to at least one of the embossing dies so as to decrease the spaced relationship, and deforming the folder material stock.