TPSiV副牌不是降级料，而是原厂同一套硅基共混配方里，邵氏硬度或耐温指标小幅飘移的那一档。
一条表带八毛变三块，这笔账怎么算
手环表带用普通TPE，一条成本八毛；换成硅基TPSiV，一条变三块。这笔账，怎么算都像亏。直到客户因为表带脱胶、发黏、用俩月开裂，整批退回来——一条赔三块，比材料差价贵十倍。
很多做消费电子、穿戴的厂，不是不想用TPSiV，是被它的正牌价吓住了。中间这道缝，就是TPSiV副牌的位置。这篇讲清楚。
TPSiV是什么：骨架里掺了硅橡胶的TPE
TPSiV，热塑性硅橡胶，本质是硅基的热塑性弹性体。它和普通TPE不是一个物种：普通TPE骨架是苯乙烯或聚烯烃，TPSiV骨架里掺了硅橡胶，所以手感丝滑、耐温、耐候、耐老化，还生物相容。戴在身上不致敏、不发黏，阳光下不老化。
它干啥？智能手表表带、耳机耳塞、穿戴设备软触面、消费电子防护件、医疗软密封——凡是要“亲肤、丝滑、耐操”的地方，都是它。
全球做这个的，是个小而集中的圈子。按份额口径，美国陶氏（Dow，原道康宁Dow Corning）是TPSiV这个品类的创始者和龙头，TPSiV™ 4000系列就是它的注册商标，全球份额约两成五；德国瓦克（Wacker）排第二，约两成；美国迈图（Momentive）排第三，一成五上下。国产材料在追。我们按梯队讲。
副牌通识：它不是降级料，是同一配方的指标飘
TPSiV副牌，还是那套。同一厂家同一牌号聚合，出厂检验硬度、耐温、或者手感某一项没完全踩线，就是副牌。来路四条：开停车头尾料、换牌号过渡料、工艺波动批次、副线尾料。
它还是原厂原生共混料，硅基骨架跟正牌一致，只是某项指标小幅飘。和回收硅橡胶料不是一回事——回收料硅橡胶相结构破坏，手感和耐温都掉。边界表照旧：
| 类型 | 来源 | 品质 | 典型用途 |
|---|
| 正牌 | 原厂达标批次 | 全指标达标、批次稳定 | 高要求件、认证件 |
| 副牌 | 原厂未达标批次 | 个别指标小幅偏离，基材与正牌一致 | 一般件、配色件、内件 |
| 回料/水口料 | 加工边角料再造粒 | 已受过一次热历史 | 低要求制品 |
| 再生料 | 废旧塑料回收造粒 | 性能波动大 | 低端制品、填充 |
TPSiV副牌盯三件事：邵氏硬度、耐温（热老化后手感）、表面丝滑度。这三项决定表带戴得舒不舒服、用久了发不发黏。
陶氏Dow：TPSiV这个名字本身就是它的
第一家，美国陶氏（Dow）。TPSiV这名字本身就是陶氏（原道康宁）的注册商标。它家TPSiV™ 4000系列，从30A到70A硬度全档，做智能穿戴、消费电子的厂都熟。
陶氏是这个品类的定义者，手感和耐温是行业标杆。副牌料过来，一般是硬度或耐温小幅飘，但硅基共混配方是原厂的。做对亲肤有要求的穿戴件，陶氏副牌是稳妥选择。
瓦克Wacker：从金属硅做到成品的一体化
第二家，德国瓦克（Wacker）。瓦克是有机硅全产业链大厂，从金属硅做到成品硅橡胶，GENIOPLAST®、ELASTOSIL®体系深厚。它家的硅基热塑性方向，耐候和加工性做得扎实。
瓦克的优势是一体化、批次稳。副牌料适合做对耐候有要求的消费电子软触件。挑它副牌，重点看硬度和热老化后手感。
迈图Momentive：表面手感处理的老手
第三家，美国迈图（Momentive）。迈图也是有机硅老牌，Silopren®系列在消费电子和汽车软触方向用得多。
它的特点是定制配方灵活、表面手感处理成熟。副牌料适合做对丝滑手感有要求的穿戴和防护件。选它副牌，试一下耐老化后的表面表现。
避坑：别拿苯乙烯TPE冒充硅基TPSiV
TPSiV副牌怎么挑？第一，先搞清它不是普通TPE。别拿苯乙烯TPE冒充硅基TPSiV，手感和耐温差着档。
第二，盯邵氏硬度。表带软度不对，戴几天就不舒服。第三，做热老化。穿戴件要经历夏天高温，老化后发硬发黏就是坑。
第四，测亲肤和表面。穿戴件贴皮肤，不能致敏不能发黏。第五，认厂。陶氏、瓦克、迈图这三家副牌是原厂料。第六，包装问大包装、小包装。小包装打样调硬度，大包装上量。
科隆仓库现货｜TPSIV工艺
主推品牌：陶氏、瓦克、迈图
主要牌号：TPSiV 4000系列、GENIOPLAST/ELASTOSIL系列、Silopren系列
包装规格：大包装/小包装均有备货
仓库现货通常在4000吨上下
小包副牌备货600-900吨、箱装副牌备货250-450吨、大包料/吨包料备货2650-3150吨
供应保障：检测单随货
选型口诀 + 一个惠州穿戴表带厂的案子
口诀：
1. 要丝滑亲肤、耐温耐候——硅基TPSiV；
2. 别拿普通TPE冒充硅基TPSiV；
3. 品类标杆——陶氏TPSiV 4000系列；
4. 耐候一体化——瓦克；
5. 定制手感——迈图；
6. 进厂测硬度、做热老化、试表面；
7. 打样小包装，量产大包装。
惠州有家做智能穿戴表带的客户，之前为了压成本用普通TPE做表带，夏天一出汗就发黏、戴俩月边缘开裂，客户退货率到了8%。后来换成陶氏TPSiV同牌号副牌，硬度和热老化进厂先测后签，出汗不黏、用半年不开裂，退货率降到0.5%，良率回到九成五。
材料一条贵了两块多，光退货损失一年省下的钱够覆盖十倍差价。这就是选型的价值——穿戴件贴皮肤，手感和耐操是客户直接的体验。宁波市科隆新材料有限公司常年做进口大厂副牌，消费电子、穿戴方向的案子经手不少，说白了就是帮你把“戴得久不久、黏不黏皮肤”这件事，量产之前测明白。
资料与数据来源
· 豆丁网《2025年中国热塑性有机硅弹性体行业报告》《2025年中国有机硅热塑性弹性体行业报告》
· MarketsandMarkets / Market Research Future《Silicone Elastomers Market》（2026）
· Dow TPSiV™资料；Wacker瓦克；Momentive迈图资料
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TPSiV secondary brand isn't downgraded material, but the same silicon-based blend formula from the original factory where the Shaw hardness or temperature resistance index slightly shifts.
One strap costs 80 yuan to 3 yuan, how do you calculate this account?
Wristband straps use regular TPE, each costs 0.8 yuan; Switch to silicon-based TPSiV, one tube becomes 3 yuan. No matter how you calculate it, it feels like a loss. Until the customer returned the whole batch because the straps peeled off, became sticky, cracked after two months, and lost 3 yuan each, ten times the material price difference.
Many manufacturers in consumer electronics and wearable industries aren't unwilling to use TPSiV, they're just intimidated by its official price. The gap in the middle is where the TPSiV secondary brand is. This article explains it clearly. What is
TPSiV: TPE
TPSiV with silicone rubber mixed into the frame , thermoplastic silicone rubber is essentially a silicone-based thermoplastic elastomer. It's not the same species as ordinary TPE: the typical TPE frame is made of styrene or polyolefins, while the TPSiV frame contains silicone rubber, so it feels silky to the touch, resists temperature, weather, aging, and is biocompatible. It doesn't cause allergies, doesn't feel sticky when worn, and doesn't age under sunlight.
What is it for? Smartwatch straps, earphones, earbuds, wearable device soft touches, consumer electronics protective parts, medical soft seals—wherever you want to be "skin-friendly, silky, and durable," it's the solution.
The global company doing this is a small, concentrated circle. By market share, Dow Corning (formerly Dow Corning) is the founder and leader of the TPSiV category. The TPSiV™ 4000 series is its registered trademark, with a global market share of about 25%; Germany's Wacker ranks second, about 20%; America's Momentive ranks third, around 15%. Domestic materials are catching up. Let's talk by tier.
Sub-brand Knowledge: It's not a downgrade material, it's a sub-brand with the same formula
TPSiV indicators , still the same set. If the same manufacturer and same grade are compiled, and any item in the factory inspection for hardness, temperature resistance, or feel doesn't fully meet the line, it's a secondary brand. There are four main sources: starting and stopping the stock and tail material, switching grades as transition material, process fluctuation batches, and secondary line scrap.
It's still a genuine factory blend, with a silicone-based framework consistent with the genuine brand, but with a slight fluctuation in certain indicators. It's not the same as recycled silicone rubber material—the recycled silicone rubber phase structure is damaged, resulting in reduced feel and temperature resistance. Boundary table remains as before:
| Type | Source | Quality | Typical Use |
|---|
| Genuine Brand | Original Factory Standard Batch | Full Indicator Compliant, Batch Stable | High Requirements, Certified Parts |
| Subbrand | Original factory substandard batch | slight deviations in certain indicators, substrate consistent with genuine brand | General parts, color-matched parts, internal parts |
| Reused/sprue material | Processed scraps repelled and granulated | Already experienced once heat history | Low requirements products |
| Regenerated material | Recycled Plastic Pelletizing | Significant Performance Fluctuations | Low-end Products, Filling |
TPSiV Sub-brand: Three Key Things: Shaw Hardness, Temperature Resistance (Feel After Thermal Aging), and Surface Smoothness. These three factors determine whether the strap feels comfortable to wear and whether it becomes sticky after prolonged use.
Dow Dow: The name TPSiV itself comes from its
first, Dow USA. TPSiV itself is a registered trademark of Dow (formerly Dow Corning). Their TPSiV™ 4000 series offers a full hardness range from 30A to 70A, and manufacturers familiar with smart wearables and consumer electronics.
Dow is the defining figure in this category, with hand feel and temperature resistance as industry benchmarks. The secondary brand material usually has slight fluctuations in hardness or temperature resistance, but the silicon-based blend formula is from the original manufacturer. For wearable pieces that require skin-friendly skin-friendly quality, Dow secondary is a safe choice.
Wacker: From metallic silicon to finished product integration
The second company, Germany's Wacker. Wacker is a major manufacturer in the full silicone industry chain, from metallic silicon to finished silicone rubber, with deep GENIOPLAST® and ELASTOSIL® systems. Their silicon-based thermoplastics have solid weather resistance and processability.
Wacker's strengths are integration and batch stability. Its sub-brand material is suitable for consumer electronics soft contacts with high weather resistance requirements. When choosing a secondary brand, focus on hardness and feel after thermal aging.
Momentive: Experienced in surface feel treatment
Third company, Momentive USA. Momentive is also a long-established silicone brand, and the Silopren® series is widely used in consumer electronics and automotive soft touch applications.
Its features are flexible custom formulas and mature surface feel. Secondary brand materials are suitable for wearable and protective accessories that require a silky smooth feel. Choose this secondary brand and test its surface resistance after aging.
Avoid pitfalls: Don't use styrene TPE to pass off as silicon-based TPSiV
TPSiV How to choose a secondary brand? First, make sure it's not ordinary TPE. Don't pass styrene TPE as silicone-based TPSiV; the feel and temperature resistance are different.
Second, focus on Shaw hardness. If the strap is not soft, it will become uncomfortable after a few days. Third, do thermal aging. Wearable items must endure high summer temperatures, and after aging, they become hard and sticky—that's a pitfall.
Fourth, test skin affinity and surface quality. Wearable items that stick to the skin should not cause allergies or stickiness. Fifth, identify the manufacturer. Dow, Wacker, and Moment—these three sub-brands are original factory materials. Sixth, ask about large or small packaging. Small packaging samples to adjust hardness; large packages increase volume.
Cologne warehouse in stock | TPSIV process
Main brands: Dow, Wacker, Momentive
Main grades: TPSiV 4000 series, GENIOPLAST/ELASTOSIL series, Silopren series
Packaging specifications: both large and small packages are in stock
warehouse stock usually around 4000 tons
Small parcel sub-brand stock 600-900 tons, containerized sub-brand stock 250-450 tons, large package/ton package material stock 2650-3150 tons
Supply Guarantee: Test form with goods
Selection formula + a case from a Huizhou wearable watch strap factory
Mnemonic:
1. Must be silky smooth, skin-friendly, temperature and weather-resistant—silicon-based TPSiV;
2. Don't pass off ordinary TPE as silicon-based TPSiV;
3. Category benchmark—Dow TPSiV 4000 series;
4. Weather-resistant integration—Wacker;
5. Custom feel—Moment;
6. On-site hardness testing, thermal aging, surface testing;
7. Small sample packaging, mass production of large packages.
Huizhou has a customer making smart wearable watch bands. Previously, to cut costs, they used ordinary TPE for straps, but in summer, they would get sticky as soon as they sweated, and the edges cracked after two months of wear. The customer return rate reached 8%. Later, I switched to Dow TPSiV sub-brand, with hardness and thermal aging tested before signing upon delivery. It doesn't stick to sweat, cracks after half a year, returns drop to 0.5%, and yield returns back to 95%.
Material costs over two yuan per piece, and the money saved from returns in a year is enough to cover the tenfold price difference. This is the value of product selection—wearable pieces that fit against the skin, feel and durability are direct customer experiences. Ningbo Kelong New Materials Co., Ltd. has long been a sub-brand for major imported factories, handling many cases in consumer electronics and wearable sectors. Simply put, they help you understand "how long you wear it and whether it sticks to your skin" before mass production.
Information and Data Source
· Douding.com "2025 China Thermoplastic Silicone Elastomer Industry Report" "2025 China Organic Silicone Thermoplastic Elastomer Industry Report"
· MarketsandMarkets / Market Research Future《Silicone Elastomers Market》（2026）
· Dow TPSiV™ profile; Wacker; Momentive profile
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