Aqueous Polymer Binding Tape for Protective Screens
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Solution Overview
Problem
Existing binding tapes for protective devices or screens, which use PVC, suffer from high melting points and long cooling times during the welding process, leading to significant downtime.
Innovation Solution
A binding tape with a first layer made from an aqueous dispersion of a polymer, preferably a vinyl ester acetate copolymer, which reduces melting point and cooling time, and a third layer of polyurethane resin, enhancing welding efficiency and compatibility with various fabrics and additives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If PVC is used as the heat-sealing material in binding tape, then the binding tape provides good strength properties and structural stability, but the welding process requires high melting point temperatures and long cooling times, leading to significant downtime
Solution Approach 1:
The patent changes the material parameter from PVC to an aqueous polymer dispersion, which fundamentally alters the thermal properties. The new material has a lower melting point and shorter cooling time, directly reducing welding downtime while maintaining the necessary strength properties through the polymer's adhesive and cohesive characteristics
Solution Approach 2:
The binding tape employs a composite structure with a fibreglass structural layer providing strength and an aqueous polymer dispersion layer providing heat-sealing capability. This combination allows the material to achieve both good strength properties and reduced welding times, as the polymer layer melts and bonds at lower temperatures while the fibreglass layer maintains structural integrity
2Ease of manufacture
If PVC is used as the heat-sealing material, then the binding tape can be welded to fabric, but the high melting point and long cooling times reduce manufacturing efficiency
Solution Approach 1:
The patent changes the thermal parameters of the heat-sealing material by using an aqueous polymer dispersion instead of PVC. The lower melting point and reduced cooling time of the polymer dispersion enable faster welding cycles, directly improving manufacturing efficiency while preserving the welding capability to bond with fabric
Solution Approach 2:
The aqueous polymer dispersion layer is designed to be applied in a controlled manner and consumed during the welding process. The material is applied as a dispersion that melts and bonds during the brief welding operation, allowing for rapid, efficient manufacturing cycles without the need for expensive, long-lasting materials
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 significantly reduces welding times, provides a strong and lasting grip on fabrics, and allows adaptation to specific requirements, improving the overall efficiency and effectiveness of the binding tape process.
Implementation Method 1
PVC has a high melting point and relatively long cooling times. Thus, in the welding process used to make the device, there is much downtime due to having to reach the welding temperature (which is directly correlated with the melting point) and then cooling the welded material.
Implementation Method 2
A layer of PVC is then placed over this layer in order to allow welding the two edges of the binding tape when the binding tape is folded around a retaining edge of the fabric.
Data Source
Figure 1
Figure 2~4
AI summary
A binding tape (1) used in the production of protective devices or screens, comprising: a first layer (10) intended to come into contact with the fabric (104) and made from a first heat-sealing material; a second layer (11) made of fibreglass. The first material (10) is an aqueous dispersion of a polymer.