TROP Sandwich Fabric: A Complete Guide to Structural Characteristics and Application Prospects
TROP sandwich fabric is a three-dimensional knitted fabric with a three-dimensional structure. It is named after the three-layer structure of the surface layer, middle layer and bottom layer, which looks like a sandwich. With its advantages of breathability and wear resistance, moderate elasticity, stiffness and style, it is very popular in sports equipment, outdoor products, car interiors and other fields. This article comprehensively analyzes the core value and development direction of TROP sandwich fabrics from six dimensions including principles and processes.
1. Principle: The three-layer structure gives the fabric core properties
The performance of TROP sandwich fabric is determined by its unique three-layer composite structure, with clear division of labor and synergy between each layer:
Surface layer: mostly made of polyester or nylon filament, with smooth surface and high density. It is wear-resistant, stain-resistant and easy to clean, and can resist external friction and stains.
Middle layer: It has a three-dimensional mesh structure, woven from polyester low-elastic yarn. The gap formed is the key to the breathability and shock absorption of the fabric. It can also support the surface layer and the bottom layer, maintain the stiffness of the fabric, and avoid collapse and deformation.
Bottom layer: mostly use soft staple fiber or spandex blended fabrics, which are skin-friendly and have strong fit, ensuring comfort during use, and also have certain elasticity and stretchability. The combination of three-layer structure allows the fabric to take into account the three core advantages of support, breathability, and comfort, far exceeding traditional single-layer fabrics.
2. Craftsmanship: weaving + composite craftsmanship to create three-dimensional texture
The core of the production process of TROP sandwich fabric lies in three-dimensional weaving and precise compounding. The main processes are as follows:
Layered weaving process: Warp knitting machines are used to weave the surface layer, middle layer and bottom layer respectively. The mesh structure of the middle layer needs to be adjusted by adjusting the warp let-off and needle bed arrangement, and controlling the mesh size and height (common mesh apertures are 2-5mm) to ensure a balance of breathability and support; if the bottom layer needs elasticity, spandex fiber is added to accurately control the blending ratio.
Composite shaping process: The three-layer structure is firmly combined through hot melt adhesive bonding or ultrasonic laminating technology. The temperature and pressure need to be controlled during lamination to avoid damaging the three-dimensional network structure of the middle layer; subsequent pre-shrinking, dyeing, and shaping treatments are used to fix the fabric size and improve color fastness and washability. Some high-end products will also add functional finishing such as UV resistance and antibacterial.
3. Application Category: Multi-scenario adaptation, covering industrial and civil fields
The three-layer structural characteristics of TROP sandwich fabric make it suitable for diverse application scenarios:
Sports and outdoor fields: It is the core fabric of sports insoles, sportswear, and protective gear. The mesh structure of the middle layer can quickly wick away sweat and breath, and the surface layer is wear-resistant and tear-resistant. It is suitable for high-intensity sports such as running and mountaineering. This fabric is also commonly used in outdoor backpacks and tent linings, taking into account both lightness and durability.
Automotive interiors: Used in car seat covers, headrests, armrests and other components. The three-dimensional structure is breathable and does not sweat. It has high wear resistance and can withstand long-term sitting pressure and friction. At the same time, it is easy to clean and reduces maintenance costs.
In the field of home textiles: it can be used to make sofa covers, mattress covers, pillows and other products. It is crisp, stylish and not easy to wrinkle. It is breathable and skin-friendly to enhance the home experience. Some baby products will also use this fabric, which is safe and non-irritating.
4. Maintenance: scientific maintenance to extend the service life of fabrics
When maintaining TROP sandwich fabrics, attention should be paid to protecting the three-dimensional structure and composite layers to avoid delamination and collapse:
Washing method: It is recommended to machine wash or hand wash in cold water. Use neutral detergent. Bleach and strong alkaline detergents are prohibited to prevent corrosion of the fabric fibers and adhesive layer. Avoid vigorous rubbing when cleaning, especially the mesh structure of the middle layer to prevent deformation.
Suning and drying: After washing, dry naturally in the shade and avoid exposure to the sun. High temperature will cause the surface to fade and the adhesive layer to fail. High-temperature drying is prohibited. The drying temperature must be controlled below 50°C, and it cannot be dried for a long time.
Storage and use: Avoid heavy pressure and folding when storing to prevent the middle layer mesh structure from collapsing; avoid contact with sharp objects when using to prevent scratching the surface or snagging.
5. Technology: Innovation and upgrading drive fabric performance breakthroughs
The current technological research and development of TROP sandwich fabrics focuses on two major directions:
Structural optimization technology: By changing the weaving method of the mesh structure of the middle layer, a gradient mesh fabric is developed, and the mesh size is adjusted according to the needs of different parts to improve the targeted support of the fabric; ultra-fine denier fibers are used to weave the surface and bottom layers to achieve a lighter, thinner and softer fabric.
Functional composite technology: Integrate functional materials such as graphene and negative ions into fabrics to develop high-end products that are warm, heat-insulating, antibacterial and deodorizing; add a waterproof coating to the surface to create waterproof and breathable outdoor-specific fabrics to expand application scenarios in extreme environments.
6. Trend Category: Green + Customization leads the new market trend
In the future, the development of TROP sandwich fabrics will present two major trends:
Green and environmental protection: The application proportion of environmentally friendly raw materials such as recycled polyester and bio-based nylon will be greatly increased. By recycling raw materials made of plastic bottles and plant fibers, the carbon footprint of fabrics will be reduced; at the same time, green processes such as waterless printing and dyeing, water-soluble hot melt adhesive will be used to reduce pollution emissions during the production process, in line with global environmental protection policy requirements.
Customization and intelligence: Provide customized solutions for different industry needs. For example, the color and hardness of automotive interior fabrics can be customized, and the elasticity and breathability of sports fabrics can be customized. The integration of intelligent temperature-control fibers and conductive fibers will promote the development of fabrics in the direction of intelligence, such as sportswear fabrics that can monitor body temperature, and heated car seat fabrics.
