先甩一组数据：国内交联聚乙烯（XLPE）电缆料年出货几十万吨，行业集中度高，前几家占了大半市场。但市场上挂着"XLPE副牌"在卖的货，杂质含量超标的、交联度不够的，做进高压电缆绝缘层，运行半年就局部放电击穿。电缆这东西，绝缘层出问题就是停电事故，拿副牌省的那点钱，不够一次抢修的零头。今天把国产XLPE的门道说清楚。
结论先说：XLPE副牌能用，但杂质含量和交联度必须先测，中低压电缆可以挑副牌，高压和超高压绝缘层别碰副牌。今天把万马高分子、上海石化、中石油系这几家国产XLPE相关企业的副牌门道，一次讲透。
XLPE是什么？国产电缆料格局
XLPE是交联聚乙烯，聚乙烯经过化学或硅烷交联后，耐热等级从七十度提到九十度甚至一百零五度，绝缘性能和机械强度大幅提升，是中高压电力电缆绝缘层和护套的核心材料。它分超净绝缘料、屏蔽料、护套料，高压绝缘料长期被陶氏、北欧化工等外资主导，国产化这几年在突破。
国产XLPE分两条线：一条是电缆料配混线，万马高分子是国内专业电缆料龙头，自有超净XLPE绝缘料配方和后吸法工艺，是国内少有的能批量做高压、超高压超净绝缘料的企业，高分子材料产能几十万吨；另一条是PE电缆基料线，中石化体系的上海石化、扬子石化、茂名石化是国内PE电缆基料的重要供应方，上海石化在基料口径里居前。中石油体系的大庆、兰州石化也是PE基料的重要来源。金发科技、道恩股份在中低压电缆料配混上也有量。
XLPE副牌：杂质和交联度是高压线
XLPE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XLPE上，副牌最常见的差异点集中在四项：杂质含量偏高、交联度（交联度/凝胶含量）波动、介电性能下降、熔指偏移。
为什么这几项关键？电缆绝缘最怕杂质和气泡，杂质多了电场集中，局部放电击穿；交联度不够，电缆发热就变形、耐热等级掉档；介电性能差了，绝缘电阻和击穿强度不达标。做高压电缆，XLPE副牌不是"便宜点"的问题，是"敢不敢上电网"的问题。
和回料的区别：XLPE回料是报废电缆、护套破碎再造，已经交联老化过一次，绝缘性能不可逆下降；XLPE副牌是原厂原生配混料或基料，只是个别指标小幅偏离。做中低压护套，用副牌是"杂质够不够低"的问题，用回料是"能不能过电网检测"的问题。
万马高分子：国产电缆料专业龙头
万马高分子（万马股份旗下）是国内电线电缆材料领域的龙头企业，三十多年专业做电缆用高分子材料，建有临安、湖州、四川、清远多个基地，高分子材料产能几十万吨。它自主掌握超净XLPE绝缘料配方和后吸法工艺，高压、超高压超净绝缘料和抗水树料实现国产化突破，国内市场份额持续提升。
万马副牌料的特点是：专业电缆料企业，批次检测规范，杂质和介电数据齐全；中低压绝缘料和护套料量大；副牌以熔指和色相小幅偏离为主，适合中低压电缆护套、一般建筑布线。高压、超高压绝缘层仍建议正牌。
适用场景：中低压电缆护套、建筑布线、一般绝缘料、非认证电缆制品。
上海石化：中石化PE电缆基料重要基地
上海石化隶属中石化，是国内PE电缆基料的重要供应方，在PE基料口径里居前，依托中石化乙烯和聚乙烯一体化平台，为下游电缆料配混厂提供超净基料。
上海石化副牌料的特点是：央企一体化基料，品质稳定；华东区位，长三角电缆厂提货近；副牌基料以熔指和色相小幅偏离为主，适合中低压护套料和电缆料配混厂掺配。超高压绝缘基料仍建议正牌。
适用场景：PE电缆基料、中低压护套料、电缆料配混、一般绝缘制品。
中石油系PE基料：大庆兰州基地
中石油体系的大庆石化、兰州石化等基地，也是国内PE电缆基料的重要来源，依托中石油炼化一体化资源，为北方和西北电缆料市场提供PE基料。
中石油系副牌料的特点是：央企基料体系，批次管理规范；北方和西北客户采购便利；副牌基料以熔指和流动性小幅波动为主，适合北方电缆料配混厂做中低压护套和一般绝缘料。
适用场景：PE电缆基料、中低压护套料、电缆料配混、一般绝缘制品。
XLPE副牌避坑指南
第一，高压超高压绝缘层别用副牌。110kV及以上高压电缆绝缘层有严格的杂质和介电要求，必须用正牌超净绝缘料，副牌只用于中低压和护套。
第二，杂质含量必测。XLPE副牌先做杂质分析，杂质超标的别进电缆绝缘线，电场集中会击穿。
第三，交联度要核。凝胶含量不够的XLPE，电缆发热就变形，耐热等级达不到标称值。
第四，分清绝缘料和护套料。绝缘料要求超净，护套料要求耐候耐腐，别拿护套料副牌当绝缘料用。
科隆仓库现货｜国产XLPE电缆料分批备
科隆在宁波仓库常备国产XLPE副牌现货，主推品牌覆盖万马高分子、上海石化、中石油系PE基料等国内相关企业。主要牌号涵盖中低压绝缘级、护套级、基料级多个常用型号，包装分大包装与小包装两种，绝缘级和护套级分仓码放。
仓库现货通常在5000吨左右：小包副牌备货800-1000吨，箱装副牌备货300-500吨，大包料/吨包料备货3500-3900吨。
供应保障走先测后签：每批XLPE副牌料到货先抽测杂质含量、交联度、熔指三项关键指标，确认是中低压可用级别再签合同；电缆厂换料前科隆可先提供小样做介电和交联验证。
选型口诀与案例
国产XLPE副牌怎么选？记住四句话：高压绝缘不碰副牌，杂质含量必测，交联度要核，绝缘护套别混。
郑州一家做低压建筑布线电缆的线缆厂，原来一直用进口XLPE护套料正牌，每吨成本偏高。今年改用科隆供的万马高分子XLPE护套副牌，先拿小样测杂质和交联度在合格范围，批量挤出后电缆护套耐温和外观都达标，成品通过低压电缆检测，每吨原料成本降了近一千五百元。老板说：低压建筑布线护套又不是高压绝缘层，杂质够低、交联度稳，国产副牌完全够用。
First, here's some data: domestic cross-linked polyethylene (XLPE) cable material ships hundreds of thousands of tons annually, with high industry concentration, and the top few companies occupy most of the market. But products sold under the "XLPE sub-brand" label, with excessive impurity content and insufficient crosslinking, are made into high-voltage cable insulation layers, and after half a year of operation, partial discharge breakdown occurs. For cables, insulation failures cause power outages. The cost saved by using a secondary plate is less than a fraction of the cost for a single emergency repair. Today, I'll clearly explain the ins and outs of domestic XLPE.
Conclusion First: XLPE secondary brands can be used, but impurity content and crosslinking must be tested first. For medium and low voltage cables, choose secondary brands; avoid secondary brands for high-voltage and ultra-high voltage insulation layers. Today, let's thoroughly explain the sub-brand secrets of several domestic XLPE-related companies such as Wanma Polymer, Shanghai Petrochemical, and PetroChina. What is
XLPE? The domestic cable material landscape
XLPE cross-linked polyethylene. After chemical or silane cross-linking, polyethylene's heat resistance rating increases from 70 degrees to 90 degrees or even 105 degrees, greatly improving insulation performance and mechanical strength. It is the core material for insulation and sheathing for medium and high-voltage power cables. It is divided into ultra-clean insulation, shielding, and sheath materials. High-voltage insulation has long been dominated by foreign capital such as Dow and Nordic Chemicals, and localization has been breaking through in recent years.
Domestic XLPE is divided into two lines: one is the cable material mixing and mixing line. Wanma Polymer is the domestic leader in professional cable materials, owning its own ultra-clean XLPE insulation formula and post-suction process, making it one of the few domestic companies capable of mass-producing high-voltage, ultra-high-voltage ultra-clean insulation materials, with polymer material production capacity reaching hundreds of thousands of tons; The other is the PE cable base material line. Sinopec's Shanghai Petrochemical, Yangzi Petrochemical, and Maoming Petrochemical are major domestic suppliers of PE cable base materials, with Shanghai Petrochemical leading in base material specifications. PetroChina's Daqing and Lanzhou Petrochemical are also important sources of PE base materials. Kingfa Technology and Dawn Co., Ltd. also have volumes in medium and low-voltage cable material blending.
XLPE sub-brand: Impurities and crosslinking are secondary grades
XLPE high-voltage wires, and are batches with slight deviations in inspection indicators within the same original grade system. For XLPE, the most common differences in secondary brands are concentrated in four areas: high impurity content, fluctuation in crosslinking degree (crosslinking/gel content), dielectric performance decline, and melting index shift.
Why are these key points? Cable insulation is most vulnerable to impurities and bubbles; excess impurities concentrate the electric field, leading to partial discharge breakdown; If crosslinking is insufficient, the cable heats up and deforms and the heat resistance rating drops; If dielectric performance is poor, insulation resistance and breakdown strength do not meet standards. For high-voltage cables, XLPE sub-brands are not about being "cheaper," but about "whether you dare to put them on the grid." Difference between
and recycled materials: XLPE restocking is scrapped cables and sheaths that have been broken and remade, have already undergone cross-linking aging once, and their insulation performance has irreversibly degraded; XLPE sub-brands are original factory blends or base materials, with only slight deviations in certain indicators. For medium and low voltage sheaths, using sub-brands is a matter of "low impurity levels," while reusing recycled materials is a matter of "whether they can pass grid inspection."
Wanma Polymer: Leading domestic cable material specialist
Wanma Polymer (under Wanma Co., Ltd.) is a leading enterprise in the domestic wire and cable materials field, specializing in cable polymer materials for over thirty years, with multiple bases in Lin'an, Huzhou, Sichuan, and Qingyuan, and a polymer material production capacity of hundreds of thousands of tons. It independently masters ultra-clean XLPE insulation formulas and post-suction processes, achieving breakthroughs in domestic production of high-voltage, ultra-high-voltage ultra-clean insulation and water-resistant materials, with continuous growth in domestic market share. The characteristics of
Wanma sub-brand materials are: professional cable material enterprise with standardized batch testing and complete impurity and dielectric data; large quantities of medium and low voltage insulation and sheath materials; secondary brands mainly have melt fingers and slight color deviations, suitable for medium and low voltage cable sheaths and general building wiring. High-voltage and ultra-high voltage insulation layers are still recommended to be genuine brands.
Applicable scenarios: medium and low voltage cable sheaths, building wiring, general insulation materials, non-certified cable products.
Shanghai Petrochemical: An important base for Sinopec's PE cable base materials
Shanghai Petrochemical, a subsidiary of Sinopec, is a major domestic supplier of PE cable base materials, ranking among the top in PE base material specifications. Relying on Sinopec's integrated ethylene and polyethylene platforms, it supplies ultra-clean base materials for downstream cable material mixing plants.
Shanghai Petrochemical's sub-brand materials are characterized by: integrated base materials for central enterprises, stable quality; Located in East China, with close delivery to cable factories in the Yangtze River Delta; The sub-brand base material mainly has slight deviations in melt index and hue, suitable for mixing medium and low voltage sheath materials with cable material mixing plants. Ultra-high voltage insulation base materials are still recommended to be genuine brands.
Applicable scenarios: PE cable base material, medium and low voltage sheath material, cable material blending, general insulation products.
PetroChina PE base material: Daqing Lanzhou base
PetroChina system Daqing Petrochemical and Lanzhou Petrochemical bases, also an important domestic source of PE cable base material, relying on PetroChina's integrated refining and chemical resources to supply PE base material to the northern and northwest cable material markets.
PetroChina sub-brand material features include: central enterprise base material system with standardized batch management; convenient procurement for northern and northwest customers; The secondary base material mainly fluctuates slightly in melting index and flowability, suitable for northern cable material mixing factories for medium and low voltage sheaths and general insulation materials.
Applicable scenarios: PE cable base material, medium and low voltage sheath material, cable material mixing, general insulation products.
XLPE secondary brand pitfall avoidance guide
First, use secondary brand for high-voltage and ultra-high voltage insulation layers. Insulation layers for 110kV and above high-voltage cables have strict impurity and dielectric requirements, must use genuine ultra-clean insulation materials; secondary brands are only used for medium and low voltage and sheaths.
Second, impurity content must be tested. For XLPE secondary brands, first conduct impurity analysis; do not enter cable insulation wires with excessive impurities, as concentrated electric fields can cause breakdown.
Third, check crosslinking degree. XLPE with insufficient gel content will deform when heated, and the heat resistance rating will not meet the rated value.
Fourth, distinguish between insulation and sheath materials. Insulating materials must be ultra-clean, sheath materials must be weather-resistant and corrosion-resistant. Do not use the secondary label of sheath material as insulation material.
Cologne warehouse stock | Domestic XLPE cable material stocked in batches
Cologne maintains domestic XLPE sub-brand stock at the Ningbo warehouse, with main brands covering Wanma Polymer, Shanghai Petrochemical, PetroChina-based PE base materials, and other related domestic companies. Main grades cover common models for medium and low voltage insulation, sheath, and base material. Packaging is divided into large and small packaging, with insulation and sheath grades stacked separately.
Warehouse stock is usually around 5000 tons: small parcel sub-brand stock is 800-1000 tons, containerized sub-brand stock is 300-500 tons, and large bulk material per ton is 3500-3900 tons.
Supply assurance follows a first-test-then-sign approach: For each batch of XLPE sub-brand material, the three key indicators are first tested for impurity content, crosslinking degree, and melting index. Only after confirming it is at medium and low voltage usable levels is the contract signed; Before cable factories change materials, Cologne can provide samples for dielectric and cross-linking verification.
Selection tips and case studies
How to choose domestic XLPE sub-brands? Remember these four points: high-voltage insulation does not touch sub-brands, impurity content must be measured, crosslinking degree must be checked, and insulation sheaths should not be mixed in.
A cable factory in Zhengzhou that makes low-voltage building wiring cables used imported XLPE sheath material for the official brand, which had a relatively high cost per ton. This year, they switched to using Wanma Polymer XLPE sheath sub-brand supplied by Cologne. First, they tested impurities and crosslinking within the qualifying range with small samples, then after batch extrusion, the sheath met temperature resistance and appearance standards. The finished product passed low-voltage cable testing, reducing raw material cost per ton by nearly 1,500 yuan. The boss said: Low-voltage building wiring sheaths are not high-voltage insulation layers; impurities are low enough and crosslinking is stable. Domestic sub-brands are more than sufficient
