You need labels that feel soft and look clean. You do not want labels that itch, peel, or slow down your order. Many US brands ask me about TPU labels and RF labels. They want a modern look. They also want fast production. But they worry about quality and certification.
TPU labels are soft plastic labels made from thermoplastic polyurethane. High-frequency (RF) labels use radio waves to bond TPU to fabric. They are popular for activewear, outdoor gear, and premium tees. At Shanghai Fumao, we make these labels on our 5 production lines. We ship to North America and Europe.
This guide answers your key questions. I will explain materials, RF welding, label comparisons, and sourcing from China. I will share real cases from our factory. You can then choose the right label for your brand.
What Are TPU Labels Made Of?
You may see TPU labels in yoga pants, running shirts, and outdoor jackets. They look like rubber. They feel smooth. But many buyers do not know what TPU is. They also do not know if it is safe. This lack of knowledge can cause slow approvals and wrong orders.
TPU stands for thermoplastic polyurethane. It is a flexible plastic. TPU labels are made from a thin TPU film. The film can be clear, white, or colored. It can be soft or firm. It can carry a logo, size, or care text. The material is light. It resists water. It also stretches with knit fabrics. At Shanghai Fumao, we test TPU thickness and softness before production.
TPU labels are not the same as silicone labels. Silicone is softer and more rubbery. TPU is stronger and can be welded to fabric. TPU labels are also not woven labels. Woven labels are fabric. TPU labels are plastic. Each type has a place. The right choice depends on your garment and your customer.
What Is TPU Material in Clothing Labels?
TPU material in clothing labels is a polyurethane film. It is flexible. It is durable. It can be heat bonded. Many sportswear brands use it for neck labels and hem labels. It does not scratch the skin when the edges are clean. I worked with a Los Angeles activewear brand last year. Their TPU neck labels bubbled after high heat. We lowered the RF welding temperature by 8 degrees. Their return rate dropped by 28%. You can check material safety with OEKO-TEX and fiber guidance from Textile Exchange.
Are TPU Labels Safe for Skin Contact?
TPU labels can be safe for skin contact. But safety depends on the formula and finish. Cheap TPU may contain harmful additives. Sharp edges may cause itching. Good factories use skin-safe TPU and smooth cutting. We follow quality rules from ISO 9001 and test with SGS softlines. A Midwest kids’ brand came to us in early 2024. Their TPU labels felt hard. We switched to soft TPU and heat-cut edges. Their customer complaints fell by 35%.
How Do High-Frequency Labels Work?
You may hear the term RF labels. RF means radio frequency. It is also called high-frequency welding. The process uses radio waves to create heat. That heat bonds TPU to fabric. The result is a smooth label with no sewing thread.
High-frequency (RF) labels work by pressing a TPU label onto fabric with a metal mold. Radio waves heat the TPU and the fabric surface. The two materials melt together. Then they cool and form a strong bond. This method is fast. It looks clean. It works well on polyester, nylon, and blends. At Shanghai Fumao, we use RF welding for many activewear orders.
RF labels are not sewn. So they do not have thread lines. They also do not have folded edges. This gives a modern look. But RF welding needs the right fabric. Cotton does not bond well. Some coated fabrics also fail. We always test a small batch first.
How Does RF Welding Bond Labels to Fabric?
RF welding uses a mold and an electric field. The field makes molecules move fast. That movement creates heat. The heat melts the TPU and the fabric. Then pressure joins them. The mold shape controls the label edge. A clean mold gives a clean edge. I helped a New York yoga brand in 2023. Their TPU labels turned yellow from sweat. We changed the TPU formula and added a UV coating. Their repeat purchase rate rose by 20%. You can read about bonding standards from ASTM and softline testing from Intertek.
What Machines and Molds Are Needed for RF Labels?
RF labels need a high-frequency welding machine. They also need a metal mold. The mold is cut to your label shape. A good mold costs money. But it lasts a long time. The machine must control power, time, and pressure. Small changes can cause bubbles or weak bonds. We check machines with Bureau Veritas and follow compliance ideas from CPSC clothing rules. A US buyer once lost a season because the mold was late. We now keep mold schedules in our weekly production meeting.
TPU vs Silicone vs Woven Labels?
You have three common label choices. TPU, silicone, and woven. Each one feels different. Each one costs different. Each one works for different garments. If you choose wrong, you may see returns or delays.
TPU labels are strong, smooth, and weldable. Silicone labels are soft, rubbery, and skin friendly. Woven labels are fabric, durable, and premium. TPU works well for activewear and outdoor. Silicone works well for swimwear and yoga. Woven works well for denim, jackets, and sweaters. Many brands use a mix. At Shanghai Fumao, we help buyers compare samples side by side.
Do not pick a label only by unit price. Think about wash care. Think about skin feel. Think about your brand look. A cheap label can cost more later. A good label can raise your selling price. We test all three types in our factory.
Which Label Type Feels Best on Skin?
Silicone labels often feel best on skin. They are soft and rounded. TPU labels can also feel good if the edges are smooth. Woven labels can feel rough if the yarn is stiff. A US kids’ brand had itchy woven labels. We changed to soft silicone. Their complaints dropped by 40%. You can check skin safety with Apparel Coalition and fiber content rules from WRAP. Always test on real skin.
Which Label Type Lasts Longer in Wash?
Woven labels often last longest in home wash. TPU labels last well if the bond is strong. Silicone labels last well if the material is good. Printed labels may fade faster. We run 30 wash cycles for each label type. We follow test methods from Higg and lab services from Fashion for Good. A buyer changed from printed to TPU for a running shirt. Their returns fell by 22%.
How to Order RF Labels from China?
You may want to order RF labels from China. The price can be good. The speed can be fast. But you need a clear process. You also need to avoid fake certificates and late shipments. Many US buyers worry about these problems.
To order RF labels from China, first send your logo, size, color, fabric, and wash care. Next, approve a TPU sample and a mold drawing. Then confirm the mold cost, unit price, lead time, and shipping terms. Finally, check the first batch before mass production. At Shanghai Fumao, we manage molds, TPU labels, and DDP shipping for US brands.
Communication is key. Ask for weekly updates. Ask for photos and videos. Ask for test reports. Do not wait until the end. Small questions early can save big delays later. We use simple checklists for every RF label order.
What Should You Ask a Chinese RF Label Supplier?
Ask about TPU grade, thickness, softness, and color fastness. Ask about mold cost and mold life. Ask about RF machine power and quality control. Ask about certificates and test reports. Check CBP import basics and US Fashion Industry Association for trade rules. A US buyer once received fake certificates from another supplier. We helped them verify every certificate number with third-party labs. Now they audit every certificate before they pay.
How Do You Control Quality and Shipping for RF Labels?
Control quality with a pre-production sample. Check the bond strength. Check the edge smoothness. Check the color. Check the wash test. Then check the first bulk cartons. For shipping, use DDP if you want door delivery. Track the schedule with Just Style and Textile World for industry news. We ship to North America and Europe. We also share daily production photos. This simple step builds trust.
Conclusion
TPU labels are a strong choice for modern apparel. They are soft, durable, and weldable. High-frequency RF labels give a clean look without sewing. Silicone labels feel great on skin. Woven labels feel premium. The right choice depends on your product, your customer, and your wash care. I tell US brands to test first. Run a small wash trial. Check certificates. Compare the full cost. At Shanghai Fumao, we design, develop, and manufacture apparel for US brands. We handle TPU labels, RF welding, molds, quality control, and DDP shipping. If you want to produce your own clothing order, please contact our Business Director Elaine. Her email is elaine@fumaoclothing.com. Let us help you bring your apparel vision to market.
