"老板，我这批TPE打出来的密封圈，冬天一冻就裂，到底是料的问题还是工艺的问题？"电话那头的采购很着急。我让他把颗粒寄过来一看，硬度标的是邵氏70A，实际测出来65A都不到，充油严重超标。做TPE这行，硬度差五个度，密封圈从"能用"变"漏水"。TPE副牌水不浅，今天把话说透。
今天就把道恩股份、金发科技、中广核俊尔这三家国内TPE头部企业的副牌门道，一次讲透。
TPE是什么？国内格局是改性配混路线
TPE是热塑性弹性体的统称，常温下像橡胶一样有弹性，加热又能像塑料一样注塑成型，不用硫化。国内说的TPE，绝大多数是把SEBS、SBS等弹性体和PP、白油共混改性出来的配混料，用在汽车密封条、家电手柄、线缆护套、牙刷握把、软胶玩具上。它不像PEEK那样靠聚合，而是靠改性配方，所以国内头部基本都是改性配混厂。
国内TPE/热塑性弹性体头部企业里，道恩股份是专业化标杆，热塑性弹性体年产能约九万吨，二〇〇六年就做出国内首条自主TPV生产线；金发科技是改性塑料航母，改性塑料总产能三百多万吨，TPE只是它庞大产品矩阵里的一块，但规模和客户覆盖都在前列；中广核俊尔背靠中广核集团，在阻燃工程塑料和耐高温TPE上有差异化优势。此外，浙江众成、江苏博特等也是TPE重要产能方。
TPE副牌：硬度和充油量是命门
TPE副牌，是改性厂同一配方体系里指标小幅偏离的批次。落到TPE上，副牌最常见的差异点集中在四项：硬度漂移、拉伸强度偏低、充油量偏多、熔指波动。
为什么这几项关键？TPE制品八成靠硬度定性能。密封件要一定硬度才有回弹力，包胶手柄要软硬适中。充油量多了，制品出油、发粘、低温变硬；拉伸低了，一拉就断。这些都是配方比例微调出来的，副牌就是某个批次油加多加少了。
和回收TPE的区别：回收TPE是制品破碎再造粒，弹性和耐老化已经损失，表面发雾；TPE副牌是原厂配混粒子，只是硬度或油份小幅偏离。做汽车密封件，用副牌是"硬度差几度"的问题，用回料是"用半年就硬化漏水"的问题。
道恩股份：国内TPE/TPV专业化标杆
道恩股份总部在山东龙口，是国内少有的把热塑性弹性体当主业做的上市公司。它的热塑性弹性体年产能约九万吨，TPV（动态硫化）产品线尤其强，国内首条自主TPV线就出自这里。下游覆盖汽车密封、新能源冷却液管路、家电、线缆等。
道恩副牌料的特点是：TPV和TPE配方成熟，批次硬度控制精细；它还向上游收了EPDM装置做原料自给，配混一致性好；副牌以硬度小幅波动为主，适合汽车非关键密封件、家电软胶件、线缆护套。
适用场景：汽车密封条、新能源管路、家电手柄、线缆护套、软胶包胶。
金发科技：改性航母里的TPE一极
金发科技在广州，是国内改性塑料规模最大的企业之一，改性塑料年产能三百多万吨。它的TPE/TPV产品线覆盖汽车、家电、电动工具等领域，背靠庞大的改性技术平台，配方迭代快。
金发副牌料的特点是：配方体系齐全，从软质到硬质TPE都有；汽车和家电客户多，副牌多来自量产牌号切换；品质稳定但因为量大，副牌批次需要逐批确认硬度。适合汽车内饰软胶件、家电包胶、日用制品。
适用场景：汽车内饰软胶、电动工具手柄、家电包胶、日用品、玩具。
中广核俊尔：阻燃耐高温TPE的差异化路线
中广核俊尔是浙江温州的改性企业，背靠中广核集团，在阻燃工程塑料和耐高温改性材料上有差异化积累，TPE产品侧重阻燃、耐温等中高端方向，客户涉及新能源、电子电器。
俊尔副牌料的特点是：阻燃TPE、耐高温TPE这类特种方向有口碑；产品定位偏中高端，副牌量相对少；适合有阻燃或耐温要求的线缆护套、电子电器软胶件。
适用场景：阻燃线缆护套、电子电器软胶件、新能源密封件、耐高温包胶。
TPE副牌避坑指南
第一，硬度必须实测。TPE副牌硬度漂移最常见，别信包装袋上的标称值，到货用邵氏硬度计打三点取平均。
第二，查充油量。把颗粒放白纸上放两天，看有没有油印子渗出；出油的副牌用在密封件上，半年就硬化。
第三，分清TPE和TPV。TPV耐温耐油更好，价格也高，别拿普通TPE副牌当TPV用在发动机舱周边。
第四，食品接触和医疗件别用副牌。有食品接触或医疗认证要求的TPE制品，必须用正牌并保留认证，副牌只用于工业件。
科隆仓库现货｜国产TPE规格混搭
科隆在宁波仓库常备国产TPE副牌现货，主推品牌覆盖道恩股份、金发科技、中广核俊尔三家国内头部企业。主要牌号涵盖邵氏50A到90A多个硬度档，包装分大包装与小包装两种，不同硬度和用途按客户产品混搭备货。
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。
供应保障走检测单随货：每批TPE副牌料随货附硬度、拉伸强度、充油量检测数据；不同硬度档分仓码放，客户报产品用途，科隆直接匹配合适硬度的现货批次。
选型口诀与案例
国产TPE副牌怎么选？记住四句话：硬度到货必测，出油坚决不用，TPE和TPV别混，认证件不碰副牌。
合肥一家做汽车内饰软胶件的注塑厂，原来一直用某进口TPE正牌做中控台包胶，每吨成本不低。今年改用科隆供的金发TPE副牌，到货先打硬度，邵氏85A在配方窗口内，又做了包胶附着力和耐低温测试都通过，批量上机后不良率没涨，每吨原料成本降了近一千四百元。车间主任说：内饰包胶又不是密封关键件，硬度够、不渗油，正牌副牌打出来客户分不出来。
"Boss, the sealing rings I produced from this batch of TPE crack in winter. Is it a material issue or a craftsmanship issue?" "The purchaser on the other end of the phone is very anxious. I asked him to send the pellets over and checked. The hardness rating is rated at Shaw Brother 70A, but the actual measured hardness is less than 65A, which seriously exceeds the oil coating standard. In the TPE business, hardness differs by five degrees, and sealing rings go from "usable" to "leaky." TPE sub-brands have a lot of issues; today I'll explain everything thoroughly.
Today, I'll thoroughly explain the sub-label secrets of three leading domestic TPE companies: Dawn Shares, Kingfa Technology, and CGN Juner. What is
TPE? Domestically, the modified blending route
TPE a general term for thermoplastic elastomers, which are elastic like rubber at room temperature and can be molded by injection molding like plastic when heated, without vulcanization. Domestically, TPE is mostly a mixture made by modifying elastomers like SEBS and SBS with PP and white oil blends, used in automotive seals, appliance handles, cable sheaths, toothbrush grips, and soft rubber toys. Unlike PEEK, it relies on polymerization but on modified formulations, so the leading domestic companies are mostly modified compound manufacturers.
Among domestic TPE/thermoplastic elastomer leading companies, Dawn Co. is a specialized benchmark, with an annual thermoplastic elastomer production capacity of about 90,000 tons. In 2006, it established China's first independent TPV production line; Kingfa Technology is the carrier of modified plastics, with a total capacity of over 3 million tons. TPE is just one part of its vast product matrix, but its scale and customer coverage are among the top; CGN Jun'er is backed by CGN Group, giving it differentiated advantages in flame-retardant engineering plastics and high-temperature resistant TPE. Additionally, Zhejiang Zhongcheng and Jiangsu Bote are also important TPE capacities.
TPE sub-brand: hardness and oil filling are the lifeblood
TPE sub-brand, and is the batch with slight deviations in indicators within the same formulation system of the modified plant. For TPE, the most common differences in sub-brands are concentrated in four areas: hardness drift, low tensile strength, excessive oil filling, and melting index fluctuations.
Why are these key factors? Eighty percent of TPE products rely on hardness to determine performance. Seals need a certain hardness to have resilience, and the rubber handle must be moderately soft. If the amount of oil is too high, the product will release oil, become sticky, and harden at low temperatures; If the stretch is low, it will break easily. All these are made by fine-tuning the formula ratio; the secondary brand is the amount added or decreased in a certain batch.
Difference from recycled TPE: recycled TPE is the product crushed and pelletized, losing elasticity and aging resistance, resulting in surface fogging; TPE secondary brand is original mixed pellets, with only slight deviations in hardness or oil content. For automotive seals, using sub-brand means "hardness difference by a few degrees," while recycled material means "hardening and leaking after half a year."
Dawn Co., Ltd.: Domestic benchmark for TPE/TPV specialization
Dawn Co., Ltd. is headquartered in Longkou, Shandong, and is one of the few listed companies in China that treats thermoplastic elastomers as its main business. Its annual thermoplastic elastomer production capacity is about 90,000 tons, with a particularly strong TPV (Dynamic Vulcanization) product line, and the country's first independent TPV line originating from here. Its downstream coverage includes automotive seals, new energy coolant pipelines, home appliances, cables, and more. The characteristics of
Dawn's sub-brand materials are: mature TPV and TPE formulations, with precise hardness control in batches; It also purchases upstream EPDM units for raw material self-supply, ensuring good consistency in blending and blending; The sub-brand mainly features slight hardness fluctuations, suitable for non-critical automotive seals, home appliance soft rubber parts, and cable sheaths.
Applicable scenarios: automotive sealing strips, new energy pipelines, home appliance handles, cable sheaths, soft rubber coatings.
Kingfa Technology: The TPE pole in the modified aircraft carrier
Kingfa Technology is in Guangzhou and one of the largest modified plastics enterprises in China, with an annual capacity of over 3 million tons of modified plastics. Its TPE/TPV product line covers automotive, home appliances, power tools, and other fields, backed by a large modification technology platform with rapid formulation iteration. The characteristics of
Kingfa's sub-brand materials are: a complete formulation system, covering both soft and hard TPEs; Many customers for automobiles and home appliances, with sub-brands mostly coming from mass production grade switching; Stable quality but due to large volumes, sub-brand batches require batch by batch to confirm hardness. Suitable for automotive interior soft rubber parts, home appliance rubber coating, and daily products.
Applicable scenarios: automotive interior soft rubber, power tool handles, home appliance rubber coating, daily necessities, toys.
CGN Jun'er: Differentiated Path in Flame-Retardant High-Temperature Resistant TPE
CGN Jun'er is a modified enterprise based in Wenzhou, Zhejiang, backed by CGN Group. It has differentiated expertise in flame-retardant engineering plastics and high-temperature resistant modified materials. TPE products focus on flame-retardant and temperature-resistant mid-to-high-end sectors, with customers including new energy and electronic appliances.
Jun'er's sub-brand materials are characterized by: flame-retardant TPE and high-temperature resistant TPE specialties have a good reputation; Product positioning is focused on mid-to-high-end products, with relatively small sub-brand volumes; Suitable for cable sheaths and electronic and electrical soft rubber parts with flame-retardant or temperature-resistant requirements.
Applicable scenarios: flame-retardant cable sheaths, electronic and electrical soft rubber parts, new energy seals, high-temperature resistant rubber coatings.
TPE secondary brand pitfall guide
First, hardness must be measured. TPE secondary brand hardness drift is most common; don't trust the nominal value on the packaging bag. When you arrive, use a Shore hardness tester to average out three points.
Second, check the oil fill. Place the pellets on white paper for two days to see if there are oil marks seeping out; Use the oil-discharged secondary brand on seals; it hardens after half a year.
Third, distinguish between TPE and TPV. TPV has better temperature and oil resistance and is more expensive; don't use ordinary TPE secondary brands as TPVs around the engine compartment.
Fourth, do not use secondary brands for food contact and medical products. TPE products with food contact or medical certification requirements must use genuine brands and retain certification; secondary brands are only used for industrial parts.
Cologne warehouse stock | Mixed domestic TPE specifications
Cologne maintains domestic TPE sub-brand stock at the Ningbo warehouse, with main brands covering three leading domestic companies: Dawn Co., Kingfa Technology, and CGN Juner. Main grades cover multiple hardness levels from Shaw Brothers 50A to 90A, with packaging in large and small packaging, and different hardness and uses are mixed according to customer products.
Warehouse stock is usually around 4000 tons: small sub-brand stock is 600-900 tons, boxed sub-brand stock is 250-450 tons, and large bulk materials per ton are 2650-3150 tons.
Supply Assurance with Inspection Order: Each batch of TPE sub-brand material comes with hardness, tensile strength, and oil fill test data; Different hardness levels are stored separately in warehouses, customers report product usage, and Cologne directly matches the appropriate hardness spot batch.
Selection Mnemonics and Case Studies
How to choose domestic TPE sub-brands? Remember these four points: Hardness must be tested upon arrival, oil release is absolutely avoided, TPE and TPV are not mixed, certified parts do not touch sub-brands.
Hefei An injection molding factory specializing in automotive interior soft plastic parts used a genuine imported TPE brand for center console coating, with a high cost per ton. This year, they switched to using the Cologne-supplied Jinfa TPE sub-brand. Upon arrival, hardness was tested first. Shore 85A was tested in the formula window for adhesive adhesion and low-temperature resistance, and after mass production, the defect rate did not increase, reducing raw material costs per ton by nearly 1,400 yuan. The workshop director said: Interior coating is not a key sealing component; it is hard enough and does not leak oil. Customers can't tell the difference when the genuine sub-brand is stamped
