说个行业里的鄙视链：做透明手机壳的看不起做鞋材的，做鞋材的看不起做管材的，做管材的看不起那些"什么TPU都敢接"的贸易商。最后发现，贸易商手里的TPU副牌，标号写着95A透明料，做出来的壳放太阳下一周就黄变。TPU这东西，硬度、透明度、耐水解，差一项就换一个应用档次。副牌能不能用，先看是谁家的料。
今天就把万华化学、美瑞新材、一诺威这三家国内TPU头部企业的副牌门道，一次讲透。
TPU是什么？国内产能谁在领跑
TPU是热塑性聚氨酯弹性体，靠二异氰酸酯和多元醇聚合，特点是耐磨、透明、回弹性好、可注塑可挤出。它用在鞋材、薄膜、线缆护套、管材、手机壳、滚筒、软管上。TPU是国内国产化做得比较彻底的品种，民营和国企都有大规模产能。
国内TPU头部企业里，万华化学依托自有的MDI原料，成本和规模都站在头部梯队，TPU年产能十几万吨；美瑞新材是国内少有的以TPU为主营业务的上市公司，烟台基地TPU产能做到十万吨级，发泡型TPU和无卤阻燃TPU技术突出；一诺威在山东淄博，聚醚和聚酯TPU都做，聚氨酯总产能九十多万吨，鞋底和胶黏方向量大。华峰化学TPU规模也很大，本文把它放在聚氨酯宽品类里另篇讲。
TPU副牌：硬度、透明度和耐水解三条线
TPU副牌，是原厂同一牌号体系里检验指标小幅偏离的批次。落到TPU上，副牌最常见的差异点集中在四项：硬度漂移、透光率下降、黄变指数偏高、耐水解等级不够。
为什么这几项关键？TPU大量做透明制品，透明度差了手机壳和薄膜就发雾；黄变指数高了，阳光下用几个月就发黄；耐水解不够，做软管和水下件，半年就发黏断裂。聚酯型TPU耐磨但不耐水解，聚醚型耐水解但硬度低，选副牌前先搞清自己用哪一型。
和再生TPU的区别：再生TPU是鞋材、管材破碎再造粒，分子量已经降解，强度和透明度都掉档；TPU副牌是原厂原生粒子，只是个别指标小幅偏离。做透明壳，用副牌是"黄变够不够低"的问题，用再生料是"透不透明"的问题。
万华化学：背靠MDI的成本型龙头
万华化学是全球MDI龙头，TPU是它下游延伸的产品线，依托自有的二异氰酸酯原料，成本控制和规模都很强。它的TPU覆盖薄膜、鞋材、管材、线缆多个方向，是国内TPU出货量最大的企业之一。
万华副牌料的特点是：原料自供导致成本优势明显，副牌价格竞争力强；薄膜级和通用注塑级量大，批次管理规范；适合对成本敏感、批量大的鞋材、管材、薄膜通用制品。透明级副牌要逐批确认黄变。
适用场景：鞋材、管材、薄膜、线缆护套、滚筒、通用注塑件。
美瑞新材：TPU专业化上市公司
美瑞新材在烟台，是国内少有的以TPU为主营业务的上市公司，烟台基地TPU产能十万吨级。它在发泡型TPU（适合运动鞋中底）和无卤阻燃TPU（5G基站外壳）上技术突出，产品定位中高端。
美瑞副牌料的特点是：特殊功能TPU口碑好，发泡级和阻燃级有技术壁垒；产品批次一致性较好；副牌多来自中高端牌号的指标小幅波动，适合鞋材中底、阻燃电子件、薄膜等中高端应用。透明级和阻燃级副牌要随货看检测单。
适用场景：运动鞋中底、5G阻燃外壳、薄膜、软管、耐磨件。
一诺威：聚醚聚酯双路线的体量型企业
一诺威在山东淄博，拥有聚醚和聚酯两条TPU路线，聚氨酯总产能九十多万吨，覆盖鞋底、胶黏、油墨、胶辊等方向，开工率常年维持高位。
一诺威副牌料的特点是：聚醚和聚酯都有，客户能一站配齐；鞋底级和胶黏级TPU量大，价格亲民；副牌以硬度和粘度小幅波动为主，适合鞋底、胶辊、胶黏等非透明、非高认证要求的制品。透明件慎用。
适用场景：鞋底、胶辊、胶黏、油墨、普通注塑件。
TPU副牌避坑指南
第一，先分聚酯型还是聚醚型。聚酯耐磨不耐水解，聚醚耐水解但偏软，用错型，做水下件半年就坏。
第二，透明件必测黄变。透明TPU副牌先做紫外老化，黄变超标的别上透明壳和薄膜。
第三，硬度要实测。TPU硬度从60A到85D跨度大，标称值和实际差几度很常见，到货打硬度。
第四，食品级和医疗级别用副牌。有食品接触或医疗认证的TPU制品，必须正牌，副牌只用于工业和一般消费品。
科隆仓库现货｜国产TPU量大常备
科隆在宁波仓库常备国产TPU副牌现货，主推品牌覆盖万华化学、美瑞新材、一诺威三家国内头部企业。主要牌号涵盖鞋材级、薄膜级、线缆级、阻燃级多个常用型号，包装分大包装与小包装两种，聚醚型和聚酯型分仓备货。
仓库现货通常在3000-6000吨：小包副牌备货500-800吨，箱装副牌备货200-400吨，大包料/吨包料备货2500-4800吨。
供应保障走原厂原包直采：科隆与三家头部企业渠道直接对接，TPU副牌料保留原厂原包标识，不拆包不混批；客户报硬度和用途，科隆从原包批次里匹配现货，黄变和硬度指标随货可查。
选型口诀与案例
国产TPU副牌怎么选？记住四句话：先分聚酯聚醚，透明件测黄变，硬度到货实测，认证件不碰副牌。
芜湖一家做运动鞋中底的制品厂，原来一直用某进口发泡TPU正牌，每吨成本压不下来。今年改用科隆供的美瑞新材发泡TPU副牌，先拿半吨做发泡倍率和回弹测试，发泡孔结构和回弹率都在原配方范围，批量上线后中底手感和回弹没差，每吨原料成本降了近两千三百元。厂长说：运动鞋中底又不做透明壳，回弹够、发泡稳，进口正牌的溢价没必要硬扛。
Let's talk about the industry's hierarchy: those who make transparent phone cases look down on those who make shoe materials, those who make shoe materials look down on those who make pipes, and those who make pipes look down on traders who "dare to accept any TPU." In the end, I found that the TPU sub-brand in the trader's hands was labeled as 95A transparent material, and the case turned yellow after just a week in the sun. TPU is a different application level in terms of hardness, transparency, and hydrolysis resistance. Whether the sub-brand can be used depends first on whose material it is.
Today, I'll thoroughly explain the sub-brand secrets of three leading domestic TPU companies: Wanhua Chemical, Meirui New Materials, and Yinuowei. What is
TPU? Domestic capacity leader
TPU thermoplastic polyurethane elastomers polymerized by diisocyanate and polyol polymerization, characterized by wear resistance, transparency, good resilience, injection molding, and extrusion capability. They are used in shoe materials, films, cable sheaths, pipes, phone cases, rollers, and hoses. TPU is a product that has been thoroughly localized domestically, with large-scale production capacity in both private and state-owned enterprises.
Among domestic TPU leading companies, Wanhua Chemical relies on its own MDI raw materials, ranking among the top in both cost and scale, with an annual TPU capacity of over 100,000 tons; Meirui New Materials is one of the few listed companies in China focused on TPU as its main business. Its Yantai base has a TPU capacity of 100,000 tons, with outstanding foamed TPU and halogen-free flame-retardant TPU technologies; Yinuowei is in Zibo, Shandong, producing both polyether and polyester TPU, with a total polyurethane production capacity of over 900,000 tons, and large volumes of shoe soles and adhesive direction. Huafeng Chemical's TPU is also very large, which will be discussed separately in the broad polyurethane category in this article.
TPU sub-brand: Hardness, transparency, and hydrolysis resistance
TPU sub-brand, which are batches with slight deviations in inspection indicators within the same original grade system. For TPU, the most common differences for sub-brands are four: hardness drift, reduced light transmittance, high yellowing index, and insufficient hydrolysis resistance rating.
Why are these key points? TPU is heavily used in transparent products; poor transparency causes phone cases and films to fog; High yellowing index causes yellowing after a few months of exposure to sunlight; Insufficient hydrolysis resistance; making tubes and underwater parts causes stickiness and breakage within half a year. Polyester TPU is wear-resistant but not hydrolytic-resistant, while polyether type is hydrolyzable but has low hardness. Before choosing a secondary brand, figure out which type you use. Difference between
and recycled TPU: Recycled TPU is made by crushing shoe material and pipes into pellets, with molecular weight already degraded, resulting in reduced strength and transparency; TPU secondary brand uses original factory particles, with only slight deviations in some indicators. For transparent shells, using secondary brands is a matter of "low yellowing enough," while using recycled material is a matter of "transparency."
Wanhua Chemical: A cost-based leader backed by MDI
Wanhua Chemical is a global leader in MDI. TPU is its downstream product line, relying on its own diisocyanate raw materials for strong cost control and scale. Its TPU covers multiple directions including films, shoe materials, pipes, and cables, making it one of the largest domestic TPU shipment companies. The characteristics of
Wanhua sub-brand materials are: self-sourcing of raw materials leads to significant cost advantages and strong sub-brand price competitiveness; Large volumes of film-grade and general injection molding grades, with standardized batch management; Suitable for cost-sensitive and large-batch general products of shoe materials, pipes, and films. Transparent-grade sub-brands must confirm yellowing batch by batch.
Applicable scenarios: shoe materials, pipes, films, cable sheaths, drums, and general injection molded parts.
Meirui New Materials: TPU specialized listed company
Meirui New Materials is one of the few listed companies in China focused on TPU as its main business, with a TPU production capacity of 100,000 tons at the Yantai base. It excels in foamed TPU (suitable for sports shoe midsoles) and halogen-free flame-retardant TPU (5G base station housing), with products positioned in the mid-to-high-end.
Meirui secondary brand materials are characterized by: special function TPU has a good reputation, with technical barriers between foamed and flame-retardant grades; Product batch consistency is good; Secondary brands mostly come from mid-to-high-end grades with slight fluctuations, suitable for mid-to-high-end applications such as shoe midsoles, flame-retardant electronic components, and films. For transparent and flame-retardant secondary brands, check the inspection report with the goods.
Applicable scenarios: sports shoe midsoles, 5G flame-retardant shells, films, tubes, wear-resistant parts.
Yinuowei: A large-scale enterprise specializing in dual-route polyether polyester
Yinuowei is located in Zibo, Shandong, owning two TPU routes: polyether and polyester. The total polyurethane production capacity exceeds 900,000 tons, covering shoe soles, adhesives, inks, and rubber rollers, with operating rates consistently high. The characteristics of
Yinuowei's sub-brand materials are: both polyether and polyester, allowing customers to supply everything in one place; Large quantities of sole and adhesive grade TPU are available at affordable prices; Secondary brands mainly experience slight fluctuations in hardness and viscosity, suitable for non-transparent and non-high-certification products such as soles, rubber rollers, and adhesives. Use transparent parts with caution.
Applicable scenarios: shoe soles, rubber rollers, adhesives, ink, ordinary injection-molded parts.
TPU secondary brand pitfall guide
First, first distinguish between polyester type and polyether type. Polyester is wear-resistant but not hydrolyzable, polyether is hydrolyzable but relatively soft; if used incorrectly, underwater parts will fail within half a year.
Second, yellowing must be tested for transparent parts. Transparent TPU secondary brands must undergo UV aging; if yellowing exceeds the standard, do not use transparent shells or films.
Third, hardness must be measured. TPU hardness ranges widely from 60A to 85D, and it's common to see a few degrees difference between the nominal value and actual value. Hardness is checked upon arrival.
Fourth, use secondary brands for food grade and medical grade. TPU products with food contact or medical certification must be genuine brands; secondary brands are only used for industrial and general consumer goods.
Cologne Warehouse Stock | Large quantities of domestic TPU always in stock
Cologne keeps domestic TPU sub-brand stock in Ningbo warehouses, with main brands covering three leading domestic companies: Wanhua Chemical, Meirui New Materials, and Yinuowei. Main grades cover common models for footwear grade, film grade, cable grade, and flame retardant grade. Packaging is divided into large and small packaging, with polyether and polyester types stocked separately.
warehouse stock is usually 3000-6000 tons: small sub-brand stocks 500-800 tons, boxed sub-brand stocks 200-400 tons, large packs/ton stocks 2500-4800 tons.
Supply guarantees direct sourcing from original factory and packaging: Cologne directly connects channels with three leading companies, TPU sub-brand material retains original factory package markings, no unpacking or mixed batches; Customers report hardness and usage, Cologne matches stock from original batch packaging, yellowing and hardness indicators can be checked as needed.
Selection Mnemonics and Cases
How to choose domestic TPU sub-brand? Remember these four points: first separate polyester and polyether, test for yellowing of transparent parts, test hardness upon arrival, and ensure certified parts don't touch the secondary brand.
Wuhu is a factory specializing in sports shoe midsoles, which used to use a certain imported genuine brand of foamed TPU, and the cost per ton couldn't be reduced. This year, they switched to using the sub-brand of Meirui New Materials foamed TPU supplied by Cologne. They first tested the foaming rate and rebound rate with half a ton. The foam hole structure and rebound rate were within the original formula's range. After mass production, the feel and rebound of the midsole were good, and the cost per ton of raw material dropped by nearly 2,300 yuan. The factory director said: The midsole of sports shoes doesn't use transparent shells, so the rebound is sufficient and the foam is stable. There's no need to force the premium of imported genuine brands
