Development of new products of needle punched composite materials
Development of new products for needle punched composite materials
This article introduces some new needle-punched composite three-dimensional structural materials products and their new functions developed based on the original needle-punched nonwoven process conditions and utilizing the characteristics of three-dimensional structural materials. Its application in shoemaking materials, synthetic leather base fabrics and Application in the field of new composite fabrics. New products of needle-punched composite three-dimensional structural materials can improve application technology and product added value and meet the needs of market development. Keywords: needle-punched composite materials, three-dimensional structure, new product development, development status of needle-punched nonwoven materials. The needle-punched process is the earliest nonwoven process to achieve industrial application. It has the characteristics of wide use of raw materials, flexible process and short process. In the development process of the nonwoven industry, the needle punching process is listed as the preferred process solution as a method of reinforcing fiber webs.
Needle-punched products in China’s nonwoven industry, especially the nonwoven leather base fabric product series among synthetic leather base fabrics, have tended to compete with each other in recent years, and corporate profit margins have been further compressed. At present, the homogeneous competition between needle-punched leather base fabrics and spunlace leather base fabrics in the leather base fabric market is similar, and they mainly rely on small profits but quick turnover to maintain operations. Under the weak market situation, how to innovate research and development based on the original product process conditions, improve new product application technology, achieve product added value improvement, and strive to use the new functionality of the product to adapt to the new needs of the market is a common problem for industrial textile manufacturers. issues faced. Examples of research and development of acupuncture composite three-dimensional structural materials. Fujian Xinhua Co., Ltd. uses acupuncture reinforcement technology and a combination of different materials to develop new acupuncture products that meet higher requirements.
This is a brand new composite three-dimensional structure nonwoven material. Due to changes in product material composition, it has specific functional technical indicators. New composite products have the performance of traditional materials and can be made to have the same functionality, so they can replace traditional products. The raw material combination methods of composite three-dimensional structural materials can be divided into:
①Other categories of textile products and nonwoven product portfolio;
②Differentiated three-dimensional combination of similar products;
③A combination of functional raw materials and conventional materials. Producing products with new functional combinations can greatly expand the choice of raw materials. Products produced using the same processing method, because needle-punched composite three-dimensional structural materials have special structures and product functions, are superior to traditional products in terms of important physical property indicators (vertical and transverse breaking strength, tearing strength, etc.), highlighting the new processing Advantages of composite three-dimensional structural materials produced by this method. Facing a large market environment with fierce homogeneous competition, the emergence of the above-mentioned new products can meet the needs of downstream industries for new materials with outstanding functionality. Taking Jinjiang shoe companies as an example, after several years of rapid development, the Jinjiang sports shoe industry is facing a period of product homogeneity, innovation, and transformation. In line with people’s new development needs in daily life, major domestic first-line sports shoe brand manufacturers have increased their research and development efforts in leisure and travel industry supplies. In response to problems such as the rising labor costs of shoe companies and the unsuitability of traditional materials caused by mechanical automated continuous production, research and development work on needle-punched composite three-dimensional structural materials was carried out.
For example, it has developed high-strength and high-elastic pull-top fabrics, “Yundika” leather base fabrics and “Marine Silk Rhythm” composite fabrics.
High-strength and high-elastic top fabric In the sports shoe production line, the top process is one of the important processes in the production of sports shoes, which is related to the formation of the upper and sole. The traditional midsole material is a composite of the midsole plate and other materials. The drawing process has certain requirements on the thickness, strength, softness, folding fastness and surface density of the midsole material. Due to insufficient thickness and insufficient flexibility, traditional midsole materials are often solved by compounding midsoles with EVA. As the current style of sports shoes is facing a transformation, developing towards leisure and lightweight, especially the pursuit of new environmentally friendly materials (reducing chemical adhesive bonding), the contradiction between traditional materials in meeting the above functional requirements has become increasingly prominent. The high-elastic and high-strength pull-top fabric developed by Fujian Xinhua Co., Ltd. is a new midsole material that is made by selecting special woven fabrics and non-woven fabrics to be synthetically needle-punched and formed in one go. This product is superior to traditional materials in terms of material surface density, tensile strength, blasting strength, folding fastness and air permeability. The measured index of high-elastic and high-strength label fabric products is: surface density (450±20)g/ m2 breaking strength ≥900N/5cm trapezoidal tearing strength ≥450N bursting strength ≥300N/cm2 air permeability ≥450mm/s At present, this high elasticity and high strength pull top fabric has been fully used in a famous domestic brand shoe industry, and has been passed by other similar shoes Various forms of testing and identification of the company’s brand products. The Guangzhou office of a well-known brand company also tested the product and found that it met the company’s requirements. Therefore, the market prospects of this high-elastic and high-strength labang fabric are promising. 2.2 “Yundika” Leather Base Fabric Synthetic leather is widely used in footwear, clothing and home textile products and has become one of the indispensable main materials. The style and characteristics of synthetic leather products are directly related to the leather base fabric. . Leather base fabrics are divided into woven leather base fabrics and non-woven leather base fabrics (including spunlace leather base fabrics and needle-punched leather base fabrics), among which non-woven leather base fabrics such as high-stretch fiber leather base fabrics, microfiber leather base fabrics, etc. Its three-dimensional structural characteristics and special product styleThe company has developed its application in the field of high-end synthetic leather products. There are differences in mechanical properties in different directions of the non-woven leather base fabric surface, which results in differences in the transverse and longitudinal mechanical properties of synthetic leather products (the transverse and longitudinal breaking strength ratios are generally within 1:1.4).
Controlling the transverse and longitudinal breaking strength ratio of synthetic leather products within 1:1.1 has become the basic pursuit of high-quality synthetic leather. To achieve this goal, the first step is to develop leather with a transverse and longitudinal breaking strength ratio within 1:1.1. base cloth. The “Yundika” leather base fabric developed by Fujian Xinhua Co., Ltd. has achieved the requirement that the transverse and longitudinal fracture strength ratio of leather base fabric products reaches a high standard (1:1.1), and the product can meet the physical property requirements for the production of spherical leather. “Yundika” leather base fabric is a product produced by combining the two types of materials in a one-time synthesis using a combination of woven fabrics and non-woven fabrics designed with special specifications and processed by a special needle punching process. After actual production and application by synthetic leather manufacturers, the product fully meets the physical property index requirements of leather base fabrics, surpassing traditional products. At present, “Yundika” leather base fabric has been recognized and favored by tanneries in South Korea and Taiwan, China. The comparison of the breaking strength of “Yundika” leather base fabric and conventional leather base fabric is shown in 1.1 Comparison of the breaking strength of “Yundika” leather base fabric and conventional leather base fabric “Yundika” leather base fabric conventional leather base Cloth transverse breaking strength/(N·cm-1)55.648.0 Longitudinal breaking strength/(N·cm-1)57.859.4 Transverse and longitudinal strength ratio 1:1.041:1.242.3 “sea In the development and finished product design of new styles of functional textile fabrics (knitted fabrics, woven fabrics), “Silk Rhythm” composite fabrics generally adopt the method of bonding the fabric with interlining or other materials, but the methods used in the lamination Adhesives will release organic matter and fail to meet relevant safety standards for fabrics. Using aldehyde-free or low-formaldehyde adhesives or finding other means to integrate fabrics with linings or other materials are ways to solve this problem.
In 2014, Fujian Xinhua Co., Ltd. developed a new type of composite fabric – “Marine Silk Rhythm” fabric, which effectively solved the problem of “inorganic adhesion” between fabrics and non-woven fabrics. The fabric makes full use of the effect of knitted material tissue style (warp weave, warp chain weave), takes advantage of the color diversity of knitted materials, and is produced by a combination of knitted fabrics and fiber materials, using acupuncture technology and one-time molding methods. The new “Charm of Sea Silk” fabric with three-dimensional structure perfectly integrates the style of knitted products and uses non-woven methods to show the uniqueness of the material. Since the production process is a physical change process, no organic matter is added during processing, so it has better environmental protection. At the same time, in the selection of non-woven fabrics, reasonable cotton matching can be used to form diverse coordination of material structure and color. This product is currently widely used in shoes, clothing, and luggage products. htK
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