Nonwoven Tack Cloth with Compounded Tackifier for Uniform Dust Capture
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Solution Overview
Problem
Existing nonwoven tack cloths struggle to uniformly disperse tackifiers, leading to reduced dust holding capacity and residue left on surfaces, along with lint and adhesive issues during use.
Innovation Solution
A nonwoven web material composed of olefin homopolymers and olefin-based plastomers with a glass transition temperature below 25°C, uniformly dispersing tackifiers within the fibers to enhance particulate trapping and minimize residue and lint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a tackifier is coated on a nonwoven web material using coating, spraying, or dipping methods, then the tack cloth gains dust holding capacity, but the tackifier is not uniformly dispersed and leaves residue on surfaces
Solution Approach 1:
The patent combines the tackifier with the polymer material itself during the fiber formation process, merging the adhesive function with the structural material. This integration ensures uniform distribution of tackifier throughout the nonwoven web at the fiber level, eliminating the non-uniformity problems associated with post-manufacturing coating methods while maintaining high dust holding capacity.
Solution Approach 2:
The tackifier is incorporated into the polymer blend before fiber extrusion and web formation. This preliminary action ensures that the tackifier is uniformly distributed throughout the material during the manufacturing process itself, rather than being applied afterward where uniformity is difficult to achieve. The tackifier is pre-mixed with the polymer at controlled concentrations (0.1-10% by weight) before processing.
2Quantity of substance
If a tackifier is coated on the nonwoven web material, then dust holding capacity increases, but adhesive transfers to user's hands during use
Solution Approach 1:
The tackifier is pre-incorporated into the polymer matrix during fiber formation, creating a uniform distribution throughout the web. This preliminary integration prevents the tackifier from concentrating on the surface where it would transfer to hands, while still providing sufficient dust holding capacity through bulk material properties.
Solution Approach 2:
The patent controls the concentration of tackifier within specific ranges (0.1-10% by weight of the nonwoven web) and adjusts polymer composition and fiber properties to optimize performance. By carefully controlling these parameters, the material achieves adequate dust holding capacity while minimizing adhesive transfer to hands during use.
3Quantity of substance
If a tackifier is used in coating form, then the nonwoven web material becomes stiffer
Solution Approach 1:
The tackifier is merged with the polymer material during fiber formation rather than applied as a separate coating layer. This integration allows the tackifier to be distributed throughout the bulk material at low concentrations, providing dust holding capacity without creating a stiff coating layer on the surface that would reduce web flexibility.
Solution Approach 2:
The patent uses low concentrations of tackifier (0.1-10% by weight) combined with appropriate polymer selection and fiber morphology control to achieve dust holding capacity while maintaining web flexibility. The uniform distribution at these low levels prevents the stiffness increase that occurs with higher concentration coatings.
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 achieves a dust holding capacity of 10-130 grams/m² with minimal residue (0-0.02 grams/m²) and reduced lint, ensuring clean and efficient surface cleaning without adhesive transfer.
Implementation Method 1
The second polymer includes an olefin-based plastomer having a glass transition temperature of less than about 25° C.
Implementation Method 2
nonwoven tack cloths or wipes are used in various industries for trapping dust, dirt, pathogens, and other foreign particulates
Data Source
AI summary
A nonwoven web material that contains fibers formed by compounding at least one polymer with a tackifier is provided. The nonwoven web material can be used as a wipe or tack cloth and can exhibit a dust holding capacity of at least about 10 grams/m2 and a lint potential of less than about 5 fibers/cm2. In addition to containing a tackifier that is compounded with the polymer(s) used to form the fibers of the web, the nonwoven web material can be textured, post-bonded, apertured, or treated with elemental fluorine gas to further improve its dust holding capacity and minimize lint production. In addition, the nonwoven web material leaves minimal residue after contacting a surface.