Stretch Flame Barrier Cap for Form-Fitting Mattresses
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Solution Overview
Problem
Existing flame barrier materials for mattresses lack sufficient stretch and recovery, leading to restricted foam deformation and increased labor costs during installation, while also posing skin irritation risks due to fiberglass use.
Innovation Solution
A stretchable flame-retardant textile cap with stitch-bonded skirting featuring elastomeric yarns for machine direction stretch and recovery, eliminating the need for fiberglass and simplifying the installation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional flame barrier materials (non-woven fleece, FR socks) are used, then flame retardancy is achieved, but stretch and recovery capacity is limited
Solution Approach 1:
The patent uses composite materials by combining flame retardant fibers (such as rayon, polyester, or other FR fibers) with elastomeric fibers (such as spandex or elastane) in a blended yarn construction. This creates a fabric that simultaneously provides flame retardancy through the FR fibers and stretch/recovery capability through the elastomeric fibers, resolving the contradiction between these two properties.
Solution Approach 2:
The patent changes the material parameters by selecting specific fiber compositions and ratios of flame retardant to elastomeric fibers. By adjusting the proportion of elastomeric content (typically 5-20% of the total fiber blend), the fabric achieves optimal balance between flame resistance and stretch recovery, allowing the material to meet both requirements.
2Adaptability or versatility
If FR socks are used to cover the mattress core, then stretch and recovery properties are improved, but installation complexity and labor time increase
Solution Approach 1:
The patent segments the flame barrier into separate components: a stretchable flame barrier fabric that can be cut to size and a separate elastic band for securing. This allows the main fabric to be easily installed by simply placing it over the mattress core, while the elastic band is separately attached to provide securing function, significantly reducing installation complexity and time compared to pulling on a complete FR sock.
Solution Approach 2:
The patent extracts the securing function from the main flame barrier fabric by using a separate elastic band. This separates the stretch/recovery properties (in the main fabric) from the securing function (in the elastic band), allowing the main fabric to be installed more easily without the complexity of installing a complete FR sock.
3Reliability
If fiberglass yarns are used in FR socks, then flame retardancy is enhanced, but skin irritation risk increases
Solution Approach 1:
The patent replaces permanent fiberglass reinforcement with washable, removable elastic bands that can be easily cleaned and replaced if needed. This eliminates the skin irritation problem associated with fiberglass while maintaining the necessary securing function, as the elastic bands can be removed and washed separately from the main flame barrier fabric.
Solution Approach 2:
The patent introduces an intermediary material (the elastic band) that performs the securing function without using fiberglass. The elastic band acts as a mediator between the flame barrier fabric and the mattress core, providing the necessary tension and securing without the harmful fiberglass fibers that cause skin irritation.
4Reliability
If FR caps are made from slit FR sock material, then flame barrier function is provided, but handling difficulty and distortion increase
Solution Approach 1:
The patent changes the material parameters by using a woven or knitted fabric construction instead of slit circular knit material. This fabric structure has inherent dimensional stability and does not curl or distort easily during handling and manufacturing, while still providing the required flame barrier function through the flame retardant fiber content.
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 provides enhanced form-fitting, reduced labor costs, and improved safety by maintaining comfort and cushioning properties without fiberglass, while ensuring effective flame retardancy and ease of handling during manufacturing.
Implementation Method 1
stitch-bonded skirting with machine direction stretch and recovery properties
Data Source
AI summary
A mattress including a stretchable flame-retardant textile cap incorporating a top panel of flame retardant material operatively connected to a stitch-bonded flame retardant textile skirting with machine direction stretch and recovery properties disposed over a resilient mattress core to provided flame barrier protection to the mattress core.