Against the backdrop of increasingly fierce competition in the domestic hosiery market and continuously accelerating consumption upgrade, the safety of infants' and children's intimate-wear products is becoming a focus of society-wide attention. As a Yiwu source knitting physical factory that has deeply cultivated the baby-and-children's-sock niche for over two decades, Yiwu Kaixin Hosiery Co., Ltd. (hereinafter "Kaixin Hosiery") takes the national Class A highest safety standard as its bottom line, building a full-chain closed-loop quality-control system covering raw-material warehousing, the production process, and finished-product shipping. Relying on the flexible-manufacturing capability of 60 fully-automatic integrated knitting production lines, it has achieved a 100% fulfillment rate for nine consecutive years on the 1688 platform, and is redefining the quality benchmark of Chinese children's-sock manufacturing.
Class A Standards Brooke No Compromise: Weaving Infants' and Children's Wear Safety into Every Stitch "Infants' and children's socks are in direct contact with children's delicate skin; safety and compliance are a bottom line that cannot be compromised," said a quality lead at Kaixin Hosiery in an interview. It is understood that all of Kaixin Hosiery's products strictly implement the dual-standard system of GB 18401-2010 "Basic Safety Technical Code for Textile Products" and GB 31701-2015 "Safety Technical Code for Infants and Children's Textile Products." Among these, sock products for infants and toddlers 36 months and younger must meet Class A, the highest safety grade—formaldehyde content not exceeding 20 mg/kg, pH value strictly controlled in the 4.0–7.5 range; direct-skin-contact products for children aged 3 to 14 must meet at least Class B requirements, and the company simultaneously implements internal-control standards stricter than the national standard.
Notably, in light of the characteristics of baby-and-children's socks—many decorative attachments and complex safety-risk points—Kaixin Hosiery has established a special safety-inspection mechanism in accordance with GB 31701-2015. Decorative attachments such as lace, bows, ribbons, streamers, lilies, and hanging beads are each assessed for tensile strength; the use of micrometer accessories of 3 mm and below is strictly prohibited to prevent choking hazards from accidental ingestion; all attachments must have no accessible sharp points or sharp edges; and products for infants, toddlers, and children under 7 must have no cords at the head or neck. At the same time, products must pass testing for heavy metals (total lead, total cadmium) and six phthalates, comprehensively eliminating children's wear-safety hazards.
Full-Chain Closed-Loop Quality Control: Every Batch Traceable from Raw Material to Finished Product At Kaixin Hosiery's production base on Houzhai Street, Yiwu, a full-chain closed-loop quality-control system of "raw-material warehousing—production process—finished-product shipping" has been operating stably for years. In the raw-material warehousing stage, the company conducts appearance, specification, and physical-performance testing on core raw materials such as cotton yarn, spandex-covered yarn, and nylon filament; non-conforming raw materials are directly rejected, avoiding safety risks from the source; raw materials in inventory for more than three months are re-inspected quarterly to ensure stable raw-material performance.
During production, the four core processes—knitting, toe-closing, dyeing/finishing, and setting—strictly implement first-piece confirmation and patrol inspection every two hours. The knitting stage uses Weihuan WHL2_A8 fully-automatic integrated knitting machines, with no fewer than 12 toe reinforcement rounds and needle lifts at the toe and heel controlled at 22 to 24; the toe-closing stage uses toe-to-toe seam alignment with a deviation of no more than 1 mm, and each piece is boarded and checked on both front and back; the dyeing stage strictly controls the heating rate at no more than 2°C/minute, and can be taken out of the vat only after cooling to below 80°C, with intra-batch color difference controlled within GB 250 grade 4; the setting stage operates at 100–130°C for 50–130 seconds, ensuring lasting sock shape and stable dimensions.
In the finished-product testing stage, each batch completes 11 intrinsic-quality indicator tests, covering key items such as fiber content, formaldehyde content, pH value, color fastness, azo dyes that can release carcinogenic aromatic amines, and extension value. Before the first production of each product, a third-party test report from a CMA/CNAS-qualified body is obtained; each batch establishes a complete batch file, achieving full-chain traceability of raw material, process, and finished product. For infant socks 36 months and younger, where the FZ/T 73001-2016 industry standard does not apply, the company separately formulates and files an enterprise standard as the product's execution basis, ensuring no blind spots in standard coverage.
60 Fully-Automatic Production Lines with Flexible Manufacturing: Seamless Switching Between Small-Batch Customization and Large-Scale Mass Production Stepping into Kaixin Hosiery's production workshop, 60 Weihuan WHL2_A8 fully-automatic integrated knitting machines run in sync. This equipment is a mainstream high-end sock machine in the industry, configured with intelligent pattern import and high-precision jacquard needle-selection functions, capable of precisely weaving complex patterns, three-dimensional lace, and color-block designs, ensuring high uniformity of color, pattern, and size across batch products. The company's plant area is about 1,850 square meters, warehouse area 500 square meters, core team 12, expandable to more than 30 in peak seasons, with an annual capacity of several million pairs.
Kaixin Hosiery's most competitive advantage lies in the flexible-manufacturing capability of its production lines. "Whether the customer needs a small batch of samples for trial production or large-scale mass supply, our production line can switch seamlessly without re-verifying supplier qualifications," introduced a person in charge. When undertaking a winter rush order from an e-commerce platform, the customer temporarily added a color change; thanks to the flexible line, the company first completed a small-batch trial production with existing raw materials to verify color adaptability and finished-product stability, and after customer confirmation rapidly switched to large-scale mass production, ultimately guaranteeing on-time delivery. This "able to do both large and small" flexible-manufacturing capability is especially valuable when serving e-commerce merchants' temporary adjustments and wholesalers' urgent reorders.
Over nine years of deep engagement on the 1688 platform, Kaixin Hosiery has achieved a 100% fulfillment rate and a customer repeat rate as high as 83%. The company maintains ample spot inventory, and in the face of urgent reorders from domestic wholesalers and temporary additional orders from overseas merchants, can rapidly allocate capacity to guarantee on-time fulfillment and delivery. Its business models cover spot wholesale, OEM, ODM style development, sample replication, rapid prototyping, small-batch customization, and drop-shipping, meeting the diversified needs of customers of different scales.
Independent R&D and Targeted Development: One-Stop Collaboration from Pattern Design to Mass-Produced Finished Product At Kaixin Hosiery, a professional team covering design, process R&D, and pattern optimization is the core engine that turns products from concept to reality. When customers propose special requirements, the team can directly interface, completing one-stop collaborative development from pattern debugging, pattern optimization, to sample making. The lace princess sock is a typical embodiment of this model—using double-layer lace and seamless lace-sewing craftsmanship, the team simultaneously incorporated lace firmness and infants' skin comfort into process parameters during design, balancing beauty and safety. The non-slip floor sock uses an eco-friendly dot-pattern anti-slip adhesive process, with even glue dots and strong adhesion, ensuring infants' walking safety.
Currently, Kaixin Hosiery's products cover the 0–12-year infant-and-children wear scenarios, including dozens of product series such as the infant-sock series, children's-sock series, princess-sock series, non-slip-sock series, mulberry-silk-sock series, floor-sock series, and athletic-sock series, while also laying out an adult-sock product line to cover the full-population wear needs of families. The company holds the "Yimengyu" brand-licensed trademark (Class 25, exclusive licensing, valid until 2034), qualifying it for independent brand operation and brand OEM. Its products both adapt to the aesthetics of domestic maternal-and-infant stores and e-commerce platforms, and can develop sock styles for cross-border markets according to technical parameters; export orders simultaneously benchmark against international regulations and standards such as the EU REACH regulation, US CPSIA, and OEKO-TEX Standard 100 eco-textile certification.
From Manufacturing Factory to Supply-Chain Service Provider: Winning Market Trust with Quality After more than two decades of development, Kaixin Hosiery's B-end customers have covered domestic maternal-and-infant physical stores, platform e-commerce sellers such as Tmall, Taobao, Pinduoduo, and Douyin, and brand OEM customers, while also possessing import-export qualifications to undertake cross-border orders. The company actively fulfills its social responsibilities, serving as the fifth-term vice-chairman unit of the Yiwu Anhui Chamber of Commerce, and has received honors such as the Party-Member Pioneer Award.
Over two decades of deep cultivation, 60 fully-automatic production lines, and full-process Class A safety-standard control—today, Kaixin Hosiery is growing from a traditional sock-production factory into a one-stop children's-sock supply-chain solution service provider centered on infant and children's socks. In the niche field of knitted socks, its logic is clear: deepen targeted R&D, perfect flexible manufacturing, and refine safety quality control. For customers, what Kaixin Hosiery delivers is not just a pair of socks, but a complete guarantee that makes infants' and children's intimate wear safety perceptible, verifiable, and traceable.
Industry insiders said that as the domestic maternal-and-infant consumption market continues to upgrade and parents' awareness of infant-and-children product safety keeps rising, source factories with full-chain quality-control capability, flexible-manufacturing advantages, and stable-delivery capability will welcome greater development space. Kaixin Hosiery's development path—with Class A standards as the bottom line and quality as the core competitiveness—provides a referential practical sample for the high-quality development of China's children's-sock manufacturing.