Striped spandex super-soft composite single-sided spandex super fabric: full analysis of characteristics, processes and applications

The super-soft composite single-sided spandex fabric is a new type of functional knitted fabric that combines the three-dimensional texture of the spandex, the high-elastic properties of spandex, the touch of a super-soft base and composite technology. It has structural layering, elastic fit and soft skin-friendliness. The design of the single-sided spandex fabric takes into account practical performance and cost advantages, and has high application value in clothing, home furnishing and other fields.

1. Principles: Fiber synergy and structural mechanism

1. Fiber proportioning principle: The fabric base uses ultra-fine denier polyester or nylon as the main raw material, and is blended with 5%-8% spandex fiber. The high elastic recovery of spandex gives the fabric a 30%-50% stretch rate in the transverse direction, and the rebound rate is ≥90%, ensuring that the fabric recovers quickly after stretching; after the ultra-fine denier fiber is softened and finished, it feels soft and smooth, solving the pain point of conventional striped fabrics that tend to become stiff. The single-sided ammonia super layer uses high-purity spandex elastic film, which is combined with the base through a composite process to strengthen the single-sided elastic support effect and achieve the design goal of "three-dimensional texture + double-sided performance difference".

2. Principle of the strip structure: A single-jersey knitting machine is used to weave the strip texture. By adjusting the needle bed arrangement and the yarn feeding rhythm, regular longitudinal concave and convex stripes are formed with even spacing, which not only enhances the breathability and three-dimensionality of the fabric, but also improves the anti-pilling performance of the fabric; the composite process allows the fabric to retain the strip's ultra-soft touch on one side, and form an ammonia super-elastic layer on the other side to adapt to different wearing and use needs.

2. Technology: weaving and composite core processes

1. Ultra-soft base weaving of strips: A single-sided circular knitting machine is used to accurately control the stitch length and yarn tension to weave strips of gray fabric with 1x1 or 2x2 specifications. After weaving, it is pre-shrunk and shaped to eliminate internal stress and stabilize the width and weight of the fabric. It is then sanded and softened to form fine short velvet on the surface of the strips, improving the skin-friendly touch.

2. Single-sided ammonia super composite process

• Pre-treatment link: Clean and eliminate static electricity on the strip base and ammonia superelastic membrane to remove surface impurities and improve composite adhesion;

• Precise lamination process: hot melt adhesive lamination technology is used to control the lamination temperature (120-140°C) and pressure (0.2-0.4MPa) to ensure that the ammonia super film adheres closely to the substrate without bubbles or wrinkles; after lamination, it is cured at low temperature to strengthen the bonding effect while retaining the elasticity of the fabric;

• Post-finishing process: Trim and shape the composite fabric to ensure that the edges are neat, the size is stable, and the stripe texture is not damaged.

3. Environmentally friendly process standards: Use formaldehyde-free, low-VOCs hot melt adhesives and softeners, comply with OEKO-TEX® Standard 100 ecological textile certification, and meet the safety requirements for intimate apparel.

3. Application Category: Multi-scenario adaptation fields

1. Clothing field: suitable for yoga wear, base layer shirts, thermal underwear, casual pants and other products. The tape surface is soft and skin-friendly, suitable for close-fitting wear; the ammonia super surface has strong elasticity and support, which can enhance the shaping effect of clothing and adapt to sports stretching and daily wear needs; it can also be used in children's clothing and jackets, and its skin-friendly and non-irritating properties meet the needs of children's skin.

2. Home field: It can be used to make sofa covers, pillow cases, sleeping bags and other products. The striped surface is comfortable to touch and enhances the home experience; the ammonia super surface is wear-resistant and wrinkle-resistant, making it easy to clean and maintain, and extending the service life of the product.

3. Accessories field: used to make belts, wrist guards, bag linings, etc. The high elasticity of the ammonia super surface can enhance the fit and durability of accessories, and the three-dimensional texture of the striped surface enhances the aesthetics of the product.

4. Maintenance: washing and maintenance skills

1. Washing specifications: It is recommended to hand wash in cold water below 30℃, or put it in a laundry bag and choose the gentle machine wash mode; use neutral detergent, prohibit the use of bleach and strong alkaline detergents to prevent the composite layer from falling off and the elasticity of the fabric to attenuate; when machine washing, the strips should be facing inward to reduce friction damage.

2. Drying and storage: After washing, gently squeeze the water, lay it flat in the shade or hang to dry, avoid exposure to the sun to prevent the fabric from fading and the ammonia super layer from aging and hardening; fold it flat when storing, and do not press the stripping area to avoid stripe deformation; for long-term storage, put it in a breathable storage bag to prevent moisture and mildew.

3. Precautions for ironing: Try to avoid ironing; if you need to iron, you need to put the fabric with the strip side facing up, set the low temperature mode (temperature ≤ 110°C), iron with a cloth, and avoid direct contact with the ammonia super layer to prevent the elastic film from melting and failing.

5. Technology: core performance indicators and innovation directions

1. Core performance indicators

• Elasticity index: The transverse stretch rate of ammonia supersurface is ≥40%, the rebound rate is ≥92%, and there is no deformation after repeated stretching;

• Composite fastness index: washing fastness ≥ level 4, and the composite layer does not fall off or warp after 30 times of washing;

• Safety indicators: formaldehyde content ≤20mg/kg, heavy metal content in line with national standard limits, no odor and no carcinogenic dyes.

2. Technological innovation direction: Research and develop bio-based hot melt adhesive composite technology to improve the environmental protection attributes of fabrics; explore intelligent temperature-regulating ammonia super-membranes to give fabrics constant temperature functions and expand outdoor clothing application scenarios; optimize strip structure design to further enhance the breathability and anti-static properties of fabrics.

6. Trend Category: Market Development and Industry Direction

1. Functional differentiation trend: Consumers’ performance demands for clothing fabrics are increasingly segmented. Differentiated fabrics that focus on elastic support on one side and skin-friendly comfort on the other side have become the core choice for brand product upgrades.

2. Environmentally friendly composite trend: Driven by the concept of green consumption, the composite process of water-based adhesives and degradable ammonia super-film is in line with the "double carbon" goal and has become the mainstream direction of industry development.

3. The trend of personalized customization: Customized strip spacing and ammonia super-elastic grade fabrics can meet the personalized design needs of different brands. Small batch and quick-turn production models are gradually becoming popular.