Method for producing a needle punch velour carpet
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Solution Overview
Problem
Conventional methods for producing needle-punched velor carpets often fail to meet the required wear resistance standards for automotive interior applications, particularly in the passenger compartment, as assessed by the Taber test, due to inadequate fiber integration and cohesion during the production process.
Innovation Solution
A method involving the use of crown or fork needles for needling, combined with binding fibers and a foamed synthetic rubber or acrylate binder, applied without tension, to increase fiber density and cohesion, and a wax/polymer dispersion coating to enhance wear resistance, allowing for a one-operation production of a velor carpet with improved mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional needling processes are used for needle-punched velor carpet production, then the production process is simpler and faster, but the wear resistance of the carpet surface is insufficient
Solution Approach 1:
The patent applies a coating agent containing wear-resistant particles (such as polyurethane, polyacrylic, or polyamide) and binders to the fiber web before the needling process. This preliminary coating creates a protective layer on the fibers that will form the velor surface, ensuring wear resistance is built into the structure during production rather than added as a separate post-treatment step.
Solution Approach 2:
The invention uses composite materials by combining textile fibers with polymer coating agents and wear-resistant particles. The coating agent forms a composite layer on the fiber surface that enhances mechanical properties, particularly abrasion resistance, while maintaining the textile's flexibility and comfort characteristics.
2Strength
If fiber density is increased through multiple needling operations, then mechanical cohesion improves, but production time and complexity increase
Solution Approach 1:
The coating agent is applied to the fiber web before needling, creating a preliminary bonded structure that enhances mechanical cohesion. The binders in the coating agent (such as polyvinyl acetate, carboxymethyl cellulose, or starch derivatives) begin to bind fibers together during the coating and drying stages, reducing the need for excessive mechanical needling to achieve adequate cohesion.
Solution Approach 2:
The patent changes the physical and chemical parameters of the fiber web by introducing coating agents with specific binder types and concentrations. This chemical modification of the fiber surface allows for improved mechanical properties with fewer needling passes, as the binders create additional bonding points between fibers.
3Reliability
If a coating agent is applied before needling, then wear resistance is enhanced, but the production process becomes more complex
Solution Approach 1:
The coating agent serves multiple functions simultaneously: it provides wear resistance through protective particles, acts as a binder to improve mechanical cohesion, and can influence the velor surface formation during needling. This multi-functionality consolidates several requirements into a single application step, reducing the need for separate treatment stages.
Solution Approach 2:
The invention merges the wear protection function and the fiber binding function into a single coating agent formulation. Rather than applying separate wear-resistant coatings and binders in different steps, both functions are integrated into one coating composition that is applied uniformly to the fiber web before needling.
4Stability of the object's composition
If binding fibers are used to increase fiber integration, then mechanical properties improve, but the quantity of material and process complexity increase
Solution Approach 1:
The patent changes the chemical composition parameters of the coating agent to optimize binder effectiveness. By selecting specific binder types (polyvinyl acetate, carboxymethyl cellulose, starch derivatives) and controlling their concentration, the process achieves high fiber integration with minimal material addition, as the binders form efficient bonding networks between fibers.
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 a needle-punched velor carpet with enhanced wear resistance, improved cleaning behavior, and reduced emissions, meeting the stringent requirements of automobile manufacturers, as demonstrated by better Taber test scores and compliance with emission standards.
Implementation Method 1
a binder, in particular based on synthetic rubber or acrylate... for binding
Implementation Method 2
a coating agent... to enhance wear resistance
Data Source
AI summary
The present invention relates to a method for producing a needle punch carpet having a velour-type and more wear-resistant surface which has advantageous characteristics over conventional flat needle nonwovens and dilour carpets.