反常识说一句：很多人以为PPS副牌和PA副牌、PC副牌一样，都是"正牌差点指标"。其实PPS有个特殊之处——它最大的坑不是指标差一点，而是"树脂级不对路"。做玻纤增强电子连接器，你拿挤出级或涂料级PPS去掺，熔指和流动性根本对不上，打出来的连接器飞边多、强度差。PPS副牌能不能用，第一步先把品级搞对。
今天就把浙江新和成、金发科技、重庆聚狮这三家国内PPS头部企业的副牌门道，一次讲透。
PPS是什么？国内格局新和成一家独大
PPS是聚苯硫醚，耐高温长期两百度以上，阻燃、耐腐蚀、尺寸稳定，是电子电器（连接器、插座）、汽车（热管理部件）、环保（除尘滤料纤维）、涂料的主力工程塑料。它分树脂级和纤维级，树脂级又分注塑级、挤出级，纤维级用于除尘滤袋。
国内PPS头部企业里，浙江新和成是绝对龙头，PPS年产能约二点二万吨，国内居首、全球第三，也是国内少有的能同时稳定生产纤维级、注塑级、挤出级、涂料级四大级别PPS的企业；金发科技以改性PPS见长，玻纤增强PPS用在汽车电子；重庆聚狮是西南地区PPS树脂和纤维的重要产能方。此外，铜陵瑞嘉、滨化等也是国内PPS重要产能方。
PPS副牌：熔指和品级是两个硬指标
PPS副牌，是原厂同一牌号体系里指标小幅偏离的批次。落到PPS上，副牌最常见的差异点集中在四项：熔指（分子量）波动、金属杂质偏高、色相偏差、品级混用。
为什么这几项关键？PPS靠熔指定流动性和强度，熔指波动大，薄壁连接器充模和强度就不稳；金属杂质高了，做电子电器件会影响电性能；最要命的是品级混用——把涂料级或纤维级拿去注塑，工艺根本对不上。
和回料的区别：PPS回料是连接器、滤料破碎再造粒，已经受过热历史，分子量下降；PPS副牌是原厂原生树脂粒，只是个别指标小幅偏离。做电子连接器，用副牌是"熔指够不够"的问题，用回料是"能不能过安规"的问题。
浙江新和成：国产PPS全级别龙头
新和成在浙江绍兴，本来是精细化工巨头（维生素、蛋氨酸），PPS是它向下游新材料延伸的板块。它从二〇〇八年联合浙大研发，二〇一三年投产，PPS年产能做到约二点二万吨，国内居首、全球第三，是国内少有的四大级别全产企业，二〇二四年产能满产满销。
新和成副牌料的特点是：四级齐全，注塑级、挤出级、纤维级、涂料级都有，客户能按品级精准匹配；一体化生产，批次管理规范；副牌以熔指和色相小幅偏离为主，适合电子连接器、汽车部件、滤料等对品级要求明确的制品。高端认证电子件仍建议正牌。
适用场景：电子电器连接器、汽车热管理部件、除尘滤料纤维、涂层。
金发科技：改性PPS的汽车电子路线
金发科技在广州，改性塑料龙头，PPS是它在特种工程塑料方向的布局。它的PPS产品以改性粒料为主，玻纤增强、矿物增强PPS用于汽车发动机周边和电子电器部件，走国产替代路线。
金发副牌料的特点是：增强PPS配方成熟，汽车电子客户多；背靠金发改性平台，牌号选择面宽；副牌以增强比例和熔指小幅波动为主，适合汽车结构件、电子电器外壳等对成本敏感的国产替代场景。
适用场景：汽车发动机周边件、电子电器外壳、玻纤增强结构件。
重庆聚狮：西南PPS树脂与纤维
重庆聚狮新材料是西南地区PPS树脂和纤维的重要生产企业，PPS树脂和PPS滤料纤维都有产能，在环保除尘滤料方向有一定市场份额。
聚狮副牌料的特点是：树脂和纤维都有，环保滤料客户近；产品以熔指和强度小幅波动为主；适合除尘滤料、一般工业注塑件等对成本敏感、批量大的制品。
适用场景：除尘滤料纤维、工业注塑件、一般结构件。
PPS副牌避坑指南
第一，先对品级。注塑级、挤出级、纤维级、涂料级工艺完全不同，别拿涂料级去做连接器，先确认副牌是哪个级别。
第二，熔指必须和产品匹配。薄壁连接器要高流动，结构件要高强度，别拿错熔指的副牌上机。
第三，金属杂质要测。PPS做电子电器件，金属杂质高会影响绝缘，副牌要看检测单。
第四，安规认证件别用副牌。有UL安规认证的连接器，必须正牌；副牌用于非认证结构件、滤料和一般工业件。
科隆仓库现货｜国产PPS改性常备
科隆在宁波仓库常备国产PPS副牌现货，主推品牌覆盖浙江新和成、金发科技、重庆聚狮三家国内头部企业。主要牌号涵盖注塑级、挤出级、玻纤增强级、纤维级多个常用型号，包装分大包装与小包装两种，不同品级分仓码放。
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PPS副牌料随货附品级、熔指、金属杂质检测数据；不同品级分仓管理，客户报产品用途，科隆直接匹配对应品级的现货批次，避免拿错级。
选型口诀与案例
国产PPS副牌怎么选？记住四句话：先分品级，熔指对产品，金属杂质要测，安规件不碰副牌。
福州一家做汽车热管理结构件的注塑厂，原来一直用进口PPS正牌做玻纤增强部件，每吨成本偏高。今年改用科隆供的金发科技改性PPS副牌，先拿小样测熔指和玻纤含量在配方范围，批量上机后做出来的部件耐温和强度都满足装车要求，每吨原料成本降了近两千元。车间主管说：汽车热管理结构件又不是UL认证件，品级对、熔指稳，国产副牌完全顶得上。
Counterintuitive Tip: Many people think PPS secondary cards, like PA secondary cards or PC secondary brands, are all "genuine brand short-term indicators." Actually, PPS has a special feature—its biggest pitfall isn't a slight inferior indicator, but "resin grade mismatched." When making fiberglass reinforced electronic connectors, if you mix in extrusion or coating-grade PPS, the melt fingers and flow don't match, resulting in connectors with excessive flash and poor strength. Whether PPS secondary brands can be used depends on the first step: get the grade right.
Today, I'll thoroughly explain the side plate secrets of three leading domestic PPS companies: Zhejiang Xinhecheng, Kingfa Technology, and Chongqing Jushi. What is
PPS? Domestically
PPS Xinhecheng dominates the market, with polyphenylene sulfide (polyphenylene sulfide), which can withstand high temperatures above 200°C, is flame-retardant, corrosion-resistant, and dimensionally stable. It is the main engineering plastic for electronics and electrical appliances (connectors, sockets), automotive (thermal management components), environmental protection (dust filter fiber filters), and coatings. It is divided into resin and fiber grades; resin grades are further divided into injection molding and extrusion grades, with fiber grades used for dust filter bags.
Among leading domestic PPS companies, Zhejiang Xinhecheng is the absolute leader, with an annual PPS capacity of about 22,000 tons, ranking first domestically and third globally. It is also one of the few domestic companies capable of stably producing four major PPS grades: fiber, injection-molded, extrusion, and coating grade. Kingfa Technology specializes in modified PPS, with glass fiber reinforced PPS used in automotive electronics; Chongqing Jushi is an important producer of PPS resin and fiber in Southwest China. In addition, Tongling Ruijia and Binhua are also important domestic PPS producers.
PPS sub-brand: The melting index and grade are two hard indicators
PPS sub-brand, representing batches with slight deviations in the same original factory grade system. For PPS, the most common differences in sub-brands are four: melting index (molecular weight) fluctuations, high metal impurities, color deviation, and mixing grades.
Why are these key points? PPS relies on melting to specify flowability and strength; large fluctuation in the melting index makes the filling and strength of thin-walled connectors unstable; High metal impurities affect electrical performance when made into electronic and electrical devices; The most critical issue is mixing grades—applying coating or fiber grade for injection molding, with processes that simply don't match.
Difference from recycled materials: PPS recycled material is the connector and filter media crushed and re-pelletized, which have been overheated and have lost molecular weight; PPS sub-brand is original original resin pellets, with only slight deviations in certain indicators. For electronic connectors, using sub-brands is a matter of "melting finger is sufficient," while reusing recycled material is a matter of "whether it meets safety standards."
Zhejiang Xinhecheng: The leading domestic PPS in all classes
Xinhecheng is in Shaoxing, Zhejiang, originally a fine chemical giant (vitamins, methionine). PPS is its downstream segment into new materials. It began joint R&D with Zhejiang University in 2008 and started production in 2013. Its annual PPS capacity reaches about 22,000 tons, ranking first domestically and third globally. It is one of the few full-production enterprises among the four major tiers in China, with full production and sales expected in 2024. The characteristics of
Xinhecheng's sub-brand materials are: complete four grades, including injection molding, extrusion, fiber, and coating grades, allowing customers to precisely match by grade; Integrated production with standardized batch management; Sub-brands mainly feature slight deviations in melt fingers and hue, suitable for electronic connectors, automotive parts, filter media, and other products with clear grade requirements. High-end certified electronic components are still recommended to be genuine.
Applicable scenarios: electronic and electrical connectors, automotive thermal management components, dust filter media fibers, coatings.
Kingfa Technology: Modified PPS Automotive Electronics Route
Kingfa Technology is a leading manufacturer of modified plastics in Guangzhou, with PPS as its focus in specialty engineering plastics. Its PPS products mainly consist of modified pellets, with glass fiber reinforced and mineral-reinforced PPS used for automotive engine peripherals and electronic and electrical components, following a domestic substitution route. The characteristics of
Kingfa secondary brand materials are: mature reinforced PPS formulation and many automotive electronics customers; Backed by Kingfa's modified platform, it offers a wide range of grade selections; The secondary brand mainly uses reinforcement ratios and slight fluctuations in melting index, suitable for cost-sensitive domestic substitution scenarios such as automotive structural parts and electronic appliance housings.
Applicable Scenarios: automotive engine peripheral parts, electronic and electrical housings, fiberglass reinforced structural parts.
Chongqing Jushi: Southwest PPS resin and fiber
Chongqing Jushi New Materials is an important producer of PPS resin and fiber in Southwest China, with production capacity for both PPS resin and PPS filter material fibers, and holds a certain market share in the field of environmental dust filter materials. The characteristics of
Jushi sub-brand materials are: both resin and fiber, close to environmentally friendly filter material customers; Products mainly fluctuate slightly in melting index and strength; Suitable for dust filter media, general industrial injection molded parts, and other cost-sensitive and large-batch products.
Applicable scenarios: dust filter media fibers, industrial injection molded parts, general structural parts.
PPS sub-brand pitfall avoidance guide
First, first check the grade. Injection molding, extrusion, fiber, and coating grade processes are completely different. Do not use coating grade for connectors; first confirm which secondary label is used.
Second, the fusion fingers must match the product. Thin-walled connectors must have high flow, structural parts must have high strength, and do not use secondary plates with incorrect fusion fingers on the machine.
Third, metal impurities must be tested. PPS for electronic and electrical components has high metal impurities that affect insulation, so secondary brands should be checked according to the inspection report.
Fourth, do not use secondary brands for safety-certified parts. Connectors with UL safety certification must be genuine plates; secondary plates are used for non-certified structural parts, filter media, and general industrial parts.
Cologne Warehouse Stock | Domestic PPS Modified Regular Stock
Cologne maintains domestic PPS sub-brand stock at the Ningbo warehouse, with main brands covering three leading domestic companies: Zhejiang Xinhecheng, Kingfa Technology, and Chongqing Jushi. Main grades cover common models such as injection molding, extrusion, glass fiber reinforcement, and fiber grade. Packaging is divided into large and small packages, with different grades stored separately.
warehouse stock is usually around 4,000 tons: small sub-brand stock is 600-900 tons, sub-brand containerized stock is 250-450 tons, and large packages/ton are 2,650-3,150 tons.
Supply guarantee: inspection orders come with goods: each batch of PPS sub-brand material comes with grade grade, melting fingers, and metal impurity test data; Different grades are managed separately in warehouses; customers report product usage, and Cologne directly matches the corresponding grade to the spot batch, avoiding the wrong grade.
Selection tips and case studies
How to choose domestic PPS sub-brands? Remember these four points: first classify by grade, melt fingers match the product, metal impurities must be tested, and safety parts should not touch the sub-brand.
A Fuzhou injection molding factory specializing in automotive thermal management structural parts used imported PPS brand for glass fiber reinforced components, which had a relatively high cost per ton. This year, they switched to the modified PPS sub-brand supplied by Cologne. First, they used small samples to measure melting index and glass fiber content within the formula. After mass production, the components produced met the temperature resistance and strength requirements for vehicle loading, reducing raw material costs by nearly 2,000 yuan per ton. The workshop supervisor said: Automotive thermal management structural parts are not UL-certified; the grade is correct, the melting index is stable, and domestic sub-brands can fully compete
