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At a time when the textile market is constantly pursuing innovation and functionality, single-faced leopard flannel polar fleece fabric stands out with its unique appearance and practical performance. This fabric not only meets consumers' demand for personalized patterns, but also has the inherent warmth and comfort of polar fleece fabrics. It is widely used in home furnishings, outdoor equipment and other fields.
1. Analysis of material structure and physical properties
(1) Base fabric composition and characteristics of the pelletizing process
The base fabric composition of the single-sided leopard flannel polar fleece fabric is the basis for determining its performance. Usually, the fabric is made of polyester fiber (PET) as the main raw material. Polyester fiber has the advantages of high strength, good elasticity, strong wear resistance, corrosion resistance, etc., which can provide good physical properties for the fabric. During the weaving process, the base fabric forms a tight and uniform structure through a specific weaving process, laying the foundation for the subsequent polarization and printing and dyeing processes.
The polarization process is one of the key processes for single-sided leopard flannel polar fleece fabric, which gives the fabric a unique feel and warmth retention performance. The polarization process is generally divided into three main steps: combing, shearing and polarization. First, the fibers on the surface of the base fabric are combed neatly through the combing process so that they can better accept subsequent treatment; then, the shearing process trims off the overlong fibers to ensure the flatness of the fabric surface; finally, the polarization process is carried out in a specific machine. Under the action of high-speed rotation and friction, the surface fibers form uniform and dense pompoms, which not only increase the thickness and fluffiness of the fabric, but also form a large number of air layers between the fibers, thereby significantly improving the warmth retention performance of the fabric.
(2) Technical requirements for single-sided leopard print dyeing
Single-sided leopard print dyeing is an important feature that distinguishes single-sided leopard print flannel polar fleece fabric from ordinary polar fleece fabric, and its technical requirements are relatively high. Before printing and dyeing, the base fabric needs to be pretreated, including desizing, scouring, bleaching and other processes to remove impurities and grease on the surface of the base fabric and improve the fabric's ability to absorb dyes.
The design and printing of leopard prints are key links. At present, the common printing and dyeing methods are digital printing and rotary screen printing. Digital printing has the advantages of high pattern accuracy, rich colors, and short production cycle. It can accurately present the details and layering of leopard prints, but the cost is relatively high; rotary screen printing is suitable for mass production, with high production efficiency and low cost, but the fineness of the pattern may be slightly inferior. In the printing and dyeing process, it is necessary to strictly control parameters such as dye concentration, temperature and time to ensure that the leopard print is bright and lasting, while avoiding problems such as blooming and color difference. In addition, since the surface of polar fleece fabrics has fluff, special post-treatment is required after printing and dyeing, such as brushing and shaping, to restore the velvety feel and feel of the fabric.
(3) Weight and thickness parameter standards
Gram weight and thickness are important parameters to measure the quality and suitability of single-faced leopard flannel fleece fabric. Gram weight usually refers to the weight of fabric per square meter, measured in grams per square meter (g/m²). Generally speaking, the gram weight of this fabric ranges from 200 to 400g/m². Fabrics with lower gram weight (such as 200-250g/m²) are relatively light and thin, with better softness, and are suitable for making home clothing that requires high flexibility, such as pajamas and home clothes; while fabrics with higher gram weight (such as 300-400g/m²) are thicker and have stronger warmth retention performance, and are more suitable for outdoor equipment or winter clothing.
In terms of thickness, the thickness of single-sided leopard flannel fleece fabric is closely related to the gram weight, usually between 2-5 mm. The appropriate thickness not only affects the warmth retention of the fabric, but also its processing performance and wearing comfort. In actual production, it is necessary to accurately control the gram weight and thickness of the fabric according to different application scenarios and product requirements to ensure that the product achieves the best performance and quality.
2. Functional Performance Assessment
(1) Thermal insulation performance test data
Thermal insulation is one of the core functions of single-sided leopard flannel fleece fabric. In order to accurately evaluate its thermal insulation performance, researchers and testing agencies usually use professional testing equipment and methods. Common testing methods include thermal resistance test and warmth retention rate test under constant temperature and humidity environment.
In the thermal resistance test, single-sided leopard flannel polar fleece fabric and standard reference fabric (such as pure cotton fabric) are placed in the same constant temperature and humidity environment, and the thermal resistance of the fabric is calculated by measuring the temperature difference and heat flow on both sides of the fabric. The larger the thermal resistance value, the stronger the ability of the fabric to prevent heat transfer and the better the thermal insulation performance. Experimental data show that under the same gram weight and thickness conditions, the thermal resistance of single-sided leopard flannel polar fleece fabric is 3-5 times higher than that of pure cotton fabric. Its excellent thermal insulation performance is due to the large number of air layers formed by the polarization process, which can effectively prevent heat loss.
The warmth retention rate test simulates the human wearing environment and measures the fabric's ability to maintain the temperature of a heat source (such as a heating plate that simulates human body temperature) for a certain period of time to calculate the fabric's warmth retention rate. The test results show that the warmth retention rate of single-faced leopard flannel fleece fabric is usually above 80%, which can provide the wearer with lasting and stable warmth.
(2) Breathability and moisture wicking performance
Although single-faced leopard flannel fleece fabric is well known for its warmth retention, good breathability and moisture wicking are also essential. Breathability directly affects the wearer's comfort. If the fabric has poor breathability, the sweat and moisture produced by the human body cannot be discharged in time, which will cause a stuffy and humid feeling and even breed bacteria.
The air permeability of the fabric is related to its material structure and polar fleece process. Although the pompoms on the surface of polar fleece form a certain barrier layer, the polyester fiber itself has a certain pore structure, and during the polar fleece process, tiny gaps will also form between the fibers, which provide channels for air circulation. Measured by air permeability testing equipment, the air permeability of single-sided leopard flannel polar fleece fabric is generally between 10-20mm/s, which can meet the needs of daily wear and general outdoor activities.
In terms of moisture absorption and perspiration, polyester fiber is hydrophobic, but through special post-treatment processes, such as hydrophilic finishing, the fabric can be given a certain moisture absorption and perspiration function. When the human body sweats, the fabric can quickly absorb sweat and conduct the sweat to the surface of the fabric through the gaps between the fibers, accelerating the evaporation of sweat and keeping the skin dry. Experimental data shows that the single-sided leopard flannel fleece fabric with hydrophilic finishing can absorb 10%-15% of its own weight in water within 30 minutes, and basically complete evaporation within 2 hours, effectively improving the comfort of wearing.
(3) Pilling rate and abrasion resistance laboratory report
Pilling rate and abrasion resistance are important indicators to measure the durability of single-sided leopard flannel fleece fabric. In actual use, the fabric will rub against external objects. If the fabric has poor abrasion resistance, it is easy to have problems such as pilling and breakage, which will affect the appearance and service life of the product.
The laboratory usually uses Martindale abrasion tester to test the wear resistance of single-sided leopard flannel polar fleece fabric. During the test, the fabric sample is rubbed with a standard friction cloth under a certain pressure and friction times, and then the pilling and wear degree of the fabric surface are observed. The results show that after 5,000 frictions, the pilling level of high-quality single-sided leopard flannel polar fleece fabric can reach 4-5 (the pilling level is divided into 1-5, and 5 is the best), and there is only slight pilling on the surface, which will not affect the performance and appearance of the fabric. Its good wear resistance is due to the high strength of polyester fiber and the compact suede structure formed by the polarization process, which can effectively resist the damage of external friction.
In addition, the pilling rate of fabrics is also related to the way they are used and maintained. In daily use, avoid contact with sharp objects and reduce excessive friction; choose mild detergents and gentle washing mode when washing, and avoid exposure to the sun when drying. These measures can help reduce the pilling rate of fabrics and extend their service life.
3. Application scenario adaptation suggestions
(1) Adaptability of home furnishing and apparel products
Single-sided leopard flannel fleece fabric is highly adaptable in home furnishing products due to its soft and warm characteristics. When making pajamas, this fabric can provide the wearer with a warm and comfortable wearing experience, especially suitable for use in autumn and winter. Due to its unique single-sided leopard pattern, pajamas are not only practical, but also add a sense of fashion and personality, meeting consumers' demand for aesthetic home furnishings.
When making home clothes, bathrobes and other products, the warmth retention performance of the single-sided leopard flannel fleece fabric allows users to quickly feel warm after bathing or resting, while its good breathability and moisture absorption and perspiration ability can keep the body dry and avoid discomfort caused by moisture. In addition, the soft texture of the fabric is very comfortable when in contact with the skin, without causing friction, further enhancing the wearing experience of home clothes.
(2) Possibility of application of outdoor lightweight equipment
Although single-faced leopard flannel fleece fabric is relatively heavy, it still has certain application potential in the field of outdoor lightweight equipment. When designing the lining of outdoor jackets, the use of single-faced leopard flannel fleece fabric can significantly improve the warmth retention performance of the jacket. At the same time, its lightness will not add too much weight, making it suitable for outdoor activities such as hiking and mountaineering.
The warmth and unique look of this fabric make it a good choice for outdoor accessories such as hats and scarves. Leopard print can add a fashionable element to outdoor equipment, allowing users to show their personal style while enjoying outdoor activities. However, when using it outdoors, you need to pay attention to the windproof performance of the fabric. Due to its good breathability, it may need to be used in conjunction with other windproof fabrics in strong winds to improve the overall protection performance.
(3) Precautions for special cutting
There are many things to consider when doing special tailoring of single leopard flannel fleece fabric.
- Since the fabric surface has fluff, it is easy to have inconsistent fluff directions when cutting, which affects the appearance and feel of the product. Therefore, before cutting, you should carefully observe the fluff direction of the fabric and cut in a unified direction to ensure the consistency of the product surface.
- The fabric has a certain elasticity and fluffiness. When cutting complex shapes or splicing, it is necessary to accurately calculate the size and reserve appropriate seam allowances to prevent size deviations due to the expansion and contraction of the fabric. When cutting curves, use sharp scissors to ensure that the cutting edges are neat and avoid burrs and drawing.
- During the sewing process, you should choose the right sewing machine needle and thread. Since the fabric is thicker, you should use a thicker sewing machine needle (such as 14-16 needle) to ensure smooth penetration of the fabric; the sewing thread should be high-strength and wear-resistant, such as polyester fiber thread, to ensure the firmness of the sewing. When sewing, pay attention to controlling the stitch length to avoid excessive stitch length that will cause the fabric to become loose and affect product quality.
