Ammonia-Free Elastic Double-Sided Fabric

How do manufacturers of ammonia-free elastic double-sided fabrics accurately select raw materials such as polyester elastic fibers and polyester to ensure that the elasticity, strength and durability of ammonia-free elastic double-sided fabrics are optimally balanced?

1. Raw material selection
Polyester elastic fibers:
Type selection: There are many types of polyester elastic fibers, such as high-elastic polyester fibers (such as Lycra). When selecting, the elastic recovery rate, elongation and fatigue resistance of the fiber should be considered to ensure that the fabric can quickly return to its original shape after multiple stretching.
Quality assessment: Check the uniformity, breaking strength and elastic modulus of the fiber to ensure stable and reliable fiber quality.
Polyester:
Content control: The content of polyester and polyester fibers is suitable between 20% and 50% to maintain the comfort and durability of the fabric. Excessive content may cause the fabric to be stiff and airtight, affecting the wearing experience.
Fiber characteristics: Select polyester fibers with high strength and good wear resistance to improve the overall durability of the fabric.
2. Raw material ratio and mixing
Scientific ratio: According to the final use and design requirements of the fabric, the ratio of polyester elastic fibers to polyester is scientifically proportioned. For example, for sportswear that requires high elasticity, the proportion of elastic fibers can be appropriately increased; while for daily casual clothing, the proportion of elastic fibers can be appropriately reduced to improve the comfort and durability of the fabric.
Mixing technology: Use advanced fiber mixing technology to ensure that the fibers are evenly distributed in the yarn to avoid fiber aggregation or uneven distribution, which affects the overall performance of the fabric.
III. Fabric production and post-processing
Production process:
Weaving process: Select a suitable weaving process (such as knitting or weaving) to make full use of the elastic properties of the fiber and ensure the flatness and structural stability of the fabric.
Composite technology: For ammonia-free elastic double-sided fabrics, advanced composite technology is required to firmly combine two or more layers of fabric while maintaining the elasticity and breathability of the fabric.
Post-processing:
Heat setting: Through heat setting treatment, the size and shape of the fabric are stabilized, and the wrinkle resistance and elastic recovery of the fabric are improved.
Softening treatment: Use environmentally friendly softeners to soften the fabric to improve the comfort and feel of the fabric. However, it is necessary to avoid the use of waterproof treatment agents such as fluorine that may affect the breathability of the fabric.

How do suppliers of ammonia-free elastic double-sided fabrics control the thickness and density of the connecting layer to ensure the elasticity and stability of the ammonia-free elastic double-sided fabric?
1. Material selection
Selection of elastic fiber: Select fibers with good elasticity as the main material of the connecting layer, such as polyurethane (PU) elastic fiber, Lycra, etc. These fibers not only have good elastic recovery, but also can ensure the stability of the fabric to a certain extent.
Selection of base material: The base material should be selected from materials that are compatible with elastic fibers, such as polyester fiber (PET), nylon, etc. These materials have good strength and wear resistance, can support elastic fibers and provide a stable structure.
2. Production process
Thickness control
Accurate measurement: During the production process, use accurate measuring tools (such as thickness gauges) to monitor and adjust the thickness of the connecting layer in real time to ensure that the thickness meets the design requirements.
Adjustment of process parameters: The thickness of the connecting layer is accurately controlled by adjusting the process parameters such as spinning, weaving or compounding (such as fiber fineness, warp and weft density, coating thickness, etc.).
Multi-layer composite technology: When using multi-layer composite technology, the thickness and composite pressure of each layer of material should be strictly controlled to ensure that the thickness of the composite connection layer is uniform.
Density control
Adjustment of warp and weft density: During the weaving process, the density and arrangement of the warp and weft yarns are adjusted to control the density of the connection layer. Higher warp and weft density can improve the tightness and stability of the fabric, but may also affect elasticity.
Coating technology: When using coating technology, the thickness and uniformity of the coating should be accurately controlled to avoid the coating being too thick to cause the fabric to be stiff or the coating being too thin to affect stability.
Density measurement and evaluation: Use tools such as densitometers to measure and evaluate the density of the connection layer to ensure that the density meets the design requirements.