PVC Coated Gloves with Soluble Particle Indentations
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Solution Overview
Problem
Polyvinyl chloride (PVC) gloves typically have poor grip in oily conditions, which is a limitation compared to other types of gloves like latex or resin-coated gloves, and there is a need for enhanced grip, feel, and appearance.
Innovation Solution
A method involving a PVC liner coated with a polyvinyl chloride paste, followed by application of soluble solid particles and curing, which creates indentations on the surface for improved grip and a soft feel, using a combination of inner and outer PVC layers with different viscosities and solvents like water for enhanced adhesion and breathability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PVC gloves are made with a smooth surface, then they have good chemical resistance and breathability, but they have poor grip in oily conditions
Solution Approach 1:
The patent applies a porous outer layer with a rough surface topology created by incorporating particles and using a foaming resin solution that forms bubbles. This porous structure provides multiple small peaks and valleys that mechanically interlock with oily objects, significantly improving grip while maintaining the chemical resistance and breathability inherent to PVC materials.
Solution Approach 2:
The patent creates a composite glove structure with an inner smooth PVC liner layer providing chemical resistance and breathability, and an outer porous PVC layer with rough surface providing enhanced grip. The two layers are bonded together, combining the beneficial properties of smooth PVC (chemical resistance, breathability) with the grip-enhancing properties of a rough porous surface.
2Reliability
If a rough surface is created on PVC gloves, then grip is improved, but the appearance and feel may be compromised
Solution Approach 1:
The patent applies the rough porous outer layer specifically to the palm and finger areas where grip is most needed, while the back of the hand can have a different texture or smoothness. This localized application ensures enhanced grip where required without compromising the overall comfort and feel of the glove across the entire hand surface.
Solution Approach 2:
The composite structure with an inner smooth liner layer provides a comfortable feel against the skin, while the outer rough porous layer provides enhanced grip. This layered composite allows the glove to have different surface qualities in different locations and layers, optimizing both user comfort and functional performance.
3Reliability
If a porous surface is produced to improve grip and ventilation, then additional processing steps are required
Solution Approach 1:
The patent incorporates particles into the PVC paste formulation before coating, and uses a foaming resin solution that automatically forms bubbles during the coating process. These preliminary preparations allow the porous structure to form automatically during coating and curing, eliminating the need for separate pore-creation steps and reducing overall process complexity.
Solution Approach 2:
The foaming resin solution self-generates bubbles that create the porous structure during the coating process itself. The particles incorporated into the paste self-arrange to form the rough surface topology. This self-organizing behavior creates the desired porous grip-enhancing structure without requiring additional external processing steps or complex equipment.
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 method results in PVC gloves with significantly enhanced grip, especially in oily conditions, and a unique appearance, while maintaining breathability and chemical resistance, suitable for industrial use.
Implementation Method 1
The soluble solid may, in general, be soluble in any suitable solvent. Solvents that may be suitable include oxygen containing organic solvents such as alcohols (e.g. ethanol, methanol and/or propanol) or ether. However, the preferred solvent is water or an aqueous solution.
Implementation Method 2
the method further comprises at least partially gelling the outer layer after applying the particles of the water soluble solid and subsequently contacting the at least partly gelled outer layer with the solvent (preferably water or aqueous solution) before curing the outer layer
Implementation Method 3
coating at least part of the liner with a polyvinyl chloride paste (comprising, for example, an organosol of PVC and/or a plastisol of PVC) to form an outer layer, c) applying particles of a soluble solid to the outer layer, and d) curing the outer layer
Data Source
AI summary
An embodiment is disclosed of a method of making gloves, more particularly polyvinyl chloride (PVC) coated gloves. The method comprises providing a liner, and coating at least a part of the liner with a PVC paste to form a coating having an outer layer, applying particles of a soluble solid to the outer layer of the coating and curing the outer layer. Preferably, the method further comprises gelling the outer layer after applying the particles and contacting the gelled outer layer with a solvent before curing. Preferably, the soluble solid comprises a solid acid.