Hand-Tearable Adhesive Tape with Flame Retardant Fabric
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Solution Overview
Problem
Conventional adhesive tapes for automotive wiring harnesses require cutting tools for application, leading to inconvenience and length control issues, and lack flame retardancy and abrasion resistance, making them unsuitable for high-temperature and friction environments.
Innovation Solution
A hand-tearable adhesive tape is developed using a fabric woven with warps and wefts of specific densities and titers, coated with a binder-containing flame retardant and adhesive agent, allowing for hand-tearing and providing superior adhesive force, flame retardancy, and anti-raveling properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If adhesive tape is made from conventional resin layers (PVC or PET) with decompression adhesive coating, then it provides basic insulating properties, but it requires cutting tools for application and lacks hand-tearability
Solution Approach 1:
The adhesive tape is constructed with a woven fabric base consisting of intersecting warps and wefts that create natural separation lines. This segmented structure allows the tape to be easily torn by hand along the fabric grain without requiring external cutting tools, directly resolving the contradiction between ease of operation and device complexity
Solution Approach 2:
The tape structure itself provides the cutting function through its woven fabric construction. The interlacing of warps and wefts creates predetermined tear lines that enable the tape to be self-cuttable by hand, eliminating the need for separate cutting tools and making the product self-sufficient for its application needs
2Reliability
If adhesive tape uses conventional resin materials, then it provides basic adhesive properties, but it lacks flame retardancy and abrasion resistance for high-temperature automotive environments
Solution Approach 1:
The patent combines natural fiber fabrics (jute, hemp, or sisal) with synthetic adhesive coatings to create a composite material structure. The natural fibers provide inherent flame retardancy and abrasion resistance suitable for high-temperature automotive environments, while the synthetic adhesive layer maintains bonding capabilities. This composite approach resolves the contradiction by integrating materials with complementary properties that satisfy both reliability requirements and manufacturing feasibility
Solution Approach 2:
The invention changes the fundamental material parameters from conventional plastic-based resins to natural fiber-based composites. This parameter change fundamentally alters the fire resistance and abrasion characteristics of the tape, enabling it to meet automotive safety standards for flame retardancy while remaining manufacturable through existing adhesive coating processes
3Ease of operation
If adhesive tape is made with uniform fabric structure, then it provides consistent mechanical properties, but it cannot provide controlled hand-tearing at specific locations
Solution Approach 1:
The woven fabric structure creates local variations in strength and flexibility along the tape length. The intersection points of warps and wefts create predetermined zones that are easier to tear than other areas, enabling controlled hand-tearing at specific locations while maintaining consistent overall mechanical properties through uniform fabric density and composition
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 tape can be easily torn by hand without tools, maintains a high adhesive force, exhibits self-extinguishability, and satisfies abrasion resistance and withstand voltage requirements, enhancing operational efficiency and safety in high-temperature conditions.
Implementation Method 1
applying a flame retardant to one side of the processed fabric, as a pretreatment process before adhesive application
Implementation Method 2
applying an adhesive agent to a predetermined thickness to the processed fabric
Implementation Method 3
a binder-containing flame retardant at a temperature of 50° C. or higher, to prevent unraveling of yarns when the tape is torn
Data Source
AI summary
Disclosed are a hand-tearable adhesive tape which is made of a sheet woven with warps and wefts, in which the warps have a smaller titer than the wefts, and is coated with a flame retardant to provide flame retardancy and is with an adhesive agent, and a method for manufacturing the same. Advantageously, the hand-tearable adhesive tape can exhibit superior adhesive force, while providing flame retardancy and can be torn by hand.