说一个反常识的事：很多人一听POE副牌，头一个反应是“国产POE自己都刚突破，还有副牌？”印象里POE这种高端弹性体，国产化没几年，正牌都供不应求，哪来的副牌流到市场上。但跑过光伏胶膜和汽车改性厂的都知道，国产POE装置一开起来，开停车料、牌号切换过渡料、个别指标小幅偏离的批次，一样会以副牌的形式流出来。今天就把万华化学、中石化体系、京博石化这三家国产POE头部企业的副牌，拿实测数据说话。
结论先说：国产POE副牌能用，但必须盯密度、熔指和乙烯辛烯配比，这三项对不上，光伏胶膜的透光和交联就过不了。
POE是什么？国产化刚翻过关键坎
POE是聚烯烃弹性体，乙烯和α-烯烃（主要是辛烯）共聚的热塑性弹性体，透明、耐老化、韧性好、与聚烯烃相容性好，大量用于光伏封装胶膜、汽车改性（保险杠、内饰增韧）、发泡鞋材、电线电缆改性。POE长期被陶氏、三井、SK等外资垄断，是光伏胶膜国产化卡脖子的关键材料。
国内POE这几年刚翻过关键坎。万华化学烟台基地一期20万吨/年装置已满负荷运行，蓬莱二期40万吨在建，是国产POE产能排在前列的企业；中石化体系走全自主溶液法路线，茂名石化5万吨/年已投产，天津石化10万吨/年2026年进入联动试车，镇海炼化10万吨/年在建；京博石化等民营企业也在布局POE。国产POE正处在产能快速释放期。
POE副牌：密度、熔指和配比是三道关
POE副牌，是原厂同一牌号体系里检验指标小幅偏离的批次。POE这个料，指标容易飘的集中在三项：密度波动、熔融指数波动、乙烯/辛烯共聚配比偏差。
为什么盯这三项？POE的性能几乎全由密度和辛烯含量决定，密度和配比一偏，胶膜的透光率、交联度、体积电阻率就跟着偏。熔指波动则影响注塑和挤出的加工性。光伏胶膜用POE对透光和交联要求苛刻，副牌指标小幅波动都可能影响下游组件的封装良率。
和回料的区别：POE回料是胶膜、制品破碎再造粒，已经受过一次热历史，耐老化和透光性下降明显；POE副牌是原厂原生聚烯烃弹性体粒子，只是个别指标小幅偏离。做光伏胶膜，用副牌是“透光交联过不过组件测试”的问题，用回料是“敢不敢进光伏链”的问题。
万华化学：国产POE产能排头兵
万华化学是国产POE产能排在前列的企业，烟台基地一期20万吨/年装置实现满负荷运行，采用自主茂金属催化和溶液聚合技术，产品在光伏胶膜和汽车改性领域快速放量。蓬莱二期40万吨/年投产后，总产能将进一步扩大。代表牌号以光伏级和改性级POE为主。
副牌料的特点：大厂体系批次管理规范，密度和熔指波动相对可控；光伏级副牌适合对透光要求不极端的胶膜内层、汽车改性增韧等场景；山东产能，华东和华南客户运输距离适中。
适用场景：光伏胶膜内层、汽车保险杠增韧、内饰改性、发泡制品、电线电缆改性。
中石化体系：全自主溶液法国家队
中石化依托北化院自主茂金属催化剂和溶液聚合工艺，茂名石化5万吨/年是国内首套全自主溶液法示范项目，天津石化10万吨/年设备国产化率高，镇海炼化10万吨/年在建。中石化体系POE走国家队路线，保供属性强，在大客户认证中有优势。
副牌料的特点：央企体系检测体系完整，副牌指标记录齐全；茂名基地偏华南，天津基地偏华北，区域客户就近覆盖；适合汽车改性、发泡、聚烯烃增韧等对副牌接受度较高的场景。
适用场景：汽车改性增韧、发泡鞋材、聚烯烃增韧、电线电缆、一般胶膜制品。
京博石化：民营新进入者
京博石化是山东民营石化企业，依托自身烯烃资源布局POE，是国产POE新进入者之一。产品主要面向光伏胶膜和聚烯烃改性领域，处于产能爬坡和客户认证阶段。
副牌料的特点：民营机制灵活，副牌价格有竞争力；山东产能，华东客户运输距离近；适合对成本敏感、批量使用的聚烯烃增韧和改性场景；新装置产能爬坡期，副牌批次波动要多留个心眼。
适用场景：聚烯烃增韧、改性基料掺混、一般胶膜制品、发泡。
POE副牌避坑指南
第一，密度和熔指必须先测。POE副牌这两项波动直接影响胶膜透光和交联，光伏组件级客户别拿副牌赌，先小样测透光和交联。
第二，认准原生POE副牌。市场上有把EVA回料、聚烯烃回料当POE副牌卖的，POE密度更低、辛烯含量特征明显，别被价格带偏。
第三，产能爬坡期批次波动要留量。新装置刚投产，副牌批次稳定性不如成熟大厂，采购时多留安全库存。
第四，光伏链认证件走正牌。有组件认证和下游品牌客户要求的，必须用正牌或认证牌号。
科隆仓库现货｜国产POE检测单随货
科隆在宁波仓库常备国产POE副牌现货，主推品牌覆盖万华化学、中石化体系（茂名/天津）、京博石化三家国内头部企业。主要牌号涵盖光伏级、改性级、发泡级多个常用型号，包装分大包装与小包装两种，按牌号分批备货。
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POE副牌附原厂检测单，密度、熔指、辛烯配比三项关键指标随货同行；小包副牌和箱装副牌方便打样测透光和交联，大包料和吨包料适合批量切料，检测单与批号一一对应。
选型口诀与案例
国产POE副牌怎么选？记住四句话：密度熔指先测，原生回料分清，爬坡期多留库存，光伏认证件走正牌。
湖州一家做汽车内饰改性的厂，此前一直用进口POE做增韧剂，每吨成本压力大。今年改用科隆供的万华POE副牌改性级，随货检测单上密度和熔指都在配方接受范围内，先拿两吨小样做改性测试，内饰件冲击强度达标，批量切料后每吨原料成本降了两千多元。厂长说：做内饰增韧，副牌指标够，为什么要花进口正牌的钱？
Let me share something counterintuitive: When many people hear about POE sub-brands, their first reaction is, "Domestic POE has just broken through itself, so why is there a sub-brand?" "I remember that POE high-end elastomers, after only a few years of localization, the genuine brands are in short supply, so where would the sub-brands get into the market?" But anyone who's worked with photovoltaic film or automotive modification plants knows that once a domestic POE device is running, the starting and stopping materials, switching grades as transition materials, or batches with slight deviations in certain indicators will also flow out as sub-brands. Today, let's use the actual test data to speak for the sub-brands of three leading domestic POE companies: Wanhua Chemical, Sinopec System, and Jingbo Petrochemical.
Conclusion First: Domestic POE secondary brands can be used, but you must focus on density, melting index, and vinyl-octene ratio. If these three don't match, photovoltaic film light transmission and crosslinking won't pass. What is
POE? The key hurdle for localization is polyolefin elastomers
POE thermoplastic elastomers copolymerized with ethylene and α-olefin (mainly octyne), which are transparent, aging-resistant, tough, and compatible with polyolefins. They are widely used in photovoltaic encapsulation films, automotive modification (bumpers, interior toughening), foamed shoe materials, and wire and cable modification. POE has long been monopolized by foreign companies like Dow, Mitsui, and SK, and is a key bottleneck material for domestic photovoltaic films.
Domestic POE has just overcome key hurdles in recent years. Wanhua Chemical's Yantai base Phase I 200,000 tons/year unit is running at full capacity, Penglai Phase II 400,000 tons are under construction, ranking among the top domestic POE capacity companies; Sinopec's system follows a fully independent solution method: Maoming Petrochemical has 50,000 tons/year production already in commission, Tianjin Petrochemical 100,000 tons/year will enter joint trial operation in 2026, Zhenhai Refining & Chemical is building 100,000 tons/year; Private enterprises like Jingbo Petrochemical are also laying out POE strategies. Domestic POE is in a rapid capacity release phase.
POE sub-brand: density, melting index, and mixing ratio are the three key
POE sub-brands, which are batches with slight deviations in inspection indicators within the same grade system of the original factory. POE material tends to fluctuate in three key indicators: density fluctuations, melt index fluctuations, and ethylene/octene copolymer ratio deviation.
Why focus on these three factors? POE's performance is almost entirely determined by density and octene content. If density and ratio are biased, the film's light transmittance, crosslinking, and volume resistivity will also deviate. Fluctuations in the melting index affect the processability of injection molding and extrusion. POE for photovoltaic films has strict requirements for light transmission and crosslinking; even slight fluctuations in sub-brand indicators can affect the packaging yield of downstream modules.
Difference from re-feeding: POE re-material is the film and product crushed and pelletized, having undergone a thermal history, with significant decline in aging resistance and light transmission; POE's secondary brand is original polyolefin elastomer particles, with only slight deviations in some indicators. For photovoltaic film production, using sub-brands means "passing module tests for light transmission crosslinking," while using recycled materials means "dare to enter the photovoltaic chain."
Wanhua Chemical: Domestic POE capacity pioneer
Wanhua Chemical is a leading domestic POE production capacity. The first phase of the Yantai base operates at full capacity with a 200,000 tons/year plant, adopting proprietary metallocene catalysis and solution polymerization technology, rapidly scaling up products in photovoltaic film and automotive modification fields. After the Penglai phase II 400,000 tons/year production is commissioned, total capacity will further expand. Representative grades mainly photovoltaic-grade and modified-grade POE. Characteristics of
Secondary brand materials: large manufacturer system batch management standardized, density and melting index fluctuations relatively controllable; Photovoltaic-grade sub-brands are suitable for applications such as film inner layers with moderate light transmission requirements and automotive modification and toughening; Shandong production capacity, moderate transportation distances for customers in East and South China.
Applicable scenarios: photovoltaic film inner layers, automotive bumper toughening, interior modification, foam products, wire and cable modification.
Sinopec System: Fully independent national team for solution methods
Sinopec relies on Beihua Institute's proprietary metallocene catalyst and solution polymerization process; Maoming Petrochemical's 50,000 tons/year is the country's first fully independent solution method demonstration project; Tianjin Petrochemical's 100,000 tons/year equipment localization rate is high; Zhenhai Refining & Chemical's 100,000 tons/year is under construction. Sinopec's POE system follows a national team route, strong supply guarantee, and advantages in major client certification.
Features of sub-brand materials: A complete central enterprise system testing system, with complete sub-brand indicator records; Maoming base is located in South China, Tianjin base in North China, with regional customers nearby coverage; Suitable for scenarios with high acceptance of sub-brand materials, such as automotive modification, foaming, polyolefin toughening .
Applicable scenarios: automotive modification and toughening, foamed shoe materials, polyolefin toughening, wires and cables, general adhesive film products.
Jingbo Petrochemical: New Private Entrant
Jingbo Petrochemical is a private petrochemical enterprise in Shandong, leveraging its own olefin resources to lay out POE and is one of the new domestic POE entrants. Its products mainly target photovoltaic film and polyolefin modification, at the stage of capacity ramp-up and customer certification.
Features of sub-brand materials: flexible private mechanism, sub-brand prices competitive; Shandong capacity, close transportation distance to East China customers; Suitable for cost-sensitive and batch polyolefin toughening and modification scenarios; During the ramp-up phase of new plant capacity, be cautious of sub-brand batch fluctuations.
Applicable scenarios: polyolefin toughening, modified base material blending, general adhesive film products, foaming.
POE Sub-brand Pitfall Guide
First, density and melt index must be measured first. These two fluctuations in POE sub-brand directly affect film light transmission and crosslinking. Photovoltaic module-level customers should not gamble with sub-brand but first test light transmission and crosslinking in small samples.
Second, identify the secondary brand of native POE. There are sellers on the market selling EVA recycled material and polyolefin recycled material as POE secondary brands, which have lower POE density and more distinct octene content, so avoid being overpriced by the price range.
Third, reserve batch fluctuations during ramp-up periods. When new units are just starting production, sub-brand batches are less stable than established large manufacturers, so keep more safety stock when purchasing.
Fourth, use genuine certified photovoltaic chain components. If you have module certification or downstream brand customer requirements, you must use genuine or certified grades.
Cologne warehouse in-stock | Domestic POE inspection form with goods
Cologne maintains domestic POE sub-brand stock in the Ningbo warehouse, with main brands covering three leading domestic companies: Wanhua Chemical, Sinopec System (Maoming/Tianjin), and Jingbo Petrochemical. Main grades include photovoltaic grade, modified grade, and foam grade, with packaging divided into large and small packages, stocked in batches according to grade.
warehouse stock is usually around 4,000 tons: small sub-brand stock 600-900 tons, boxed sub-brand 250-450 tons, and large package/ton packaging 2,650-3,150 tons.
Supply assurance with inspection orders on delivery: Each batch of POE sub-brand comes with the original factory inspection report, with three key indicators—density, melting index, and octene ratio—carried with the goods; Small package sub-brand and boxed sub-brand make it easy for sampling to measure light transmission and crosslinking; large and ton packages are suitable for batch cutting, and the inspection sheet corresponds one-to-one with the batch number.
Selection tips and case studies
How to choose a domestic POE sub-brand? Remember these four points: first test the density melting index, distinguish native restock, keep inventory during ramp-up periods, and use the official brand for photovoltaic certified parts.
A factory in Huzhou specializing in automotive interior modification has previously used imported POE as a toughening agent, facing significant cost pressure per ton. This year, they switched to the modified Wanhua POE sub-brand supplied by Cologne. The density and melting index on the inspection report are within the formula's acceptable range. First, two tons of samples were used for modification testing. The impact strength of the interior parts met the standard, and after batch cutting, the cost of raw materials per ton dropped by more than 2,000 yuan. The factory director said: For interior toughening, the sub-brand indicators are sufficient, so why spend money on imported genuine brands?
