国产PP副牌的鄙视链，到了成本面前都得低头
注塑厂老板圈子里一直有一条隐形的鄙视链：用进口副牌的，看不上用国产副牌的；用国产副牌的，又看不上用回料和再生料的。大家嘴上都这么说，可真到原料涨价、订单压价、利润被挤到墙角的时候，谁还顾得上这条链子。
PP（聚丙烯）是用量最大的通用塑料之一，家电内件、汽车配件、编织袋、无纺布，处处都有它。正牌一吨动辄几千块，行情一波动就是几百块的差价；回料和再生料虽然便宜，可上了主机一出银纹、一变色，整批产品报废，谁也不敢真把回料往关键件上堆。国产PP副牌，就卡在这中间。问题是货源那么杂，中石化、中石油、东华能源，到底哪一家的料更对你的路子？这篇把三家掰开讲清楚。
国产PP格局：两桶油打底，民营专用料抢位
PP是丙烯聚合出来的热塑性塑料，密度低、刚性好、耐化学，改性厂和注塑厂都绕不开。国内PP产能已经接近4000万吨/年，格局相当集中。
从企业梯队看，中石化PP产能约780万至930万吨/年，覆盖燕山、扬子、茂名、镇海等十余个大型炼化基地，牌号超过一百种，高熔指纤维料、薄壁注塑料、医用料都有积累；中石油PP产能约450万至760万吨/年，依托大庆、兰州、独山子等西北基地，原料成本有一定优势；民营阵营里，东华能源以PDH（丙烷脱氢）路线为特色，宁波、张家港、淮安三大基地PP产能约160万吨/年，是民营PP专用料的代表性企业。这三家，基本代表了国产PP副牌货源的主流方向。
PP副牌到底是什么，别和回料混为一谈
先把概念说透。PP副牌不是废塑料，也不是小厂调出来的杂牌。它是同一装置、同一牌号产品中，出厂检验时个别指标——常见的是熔指、灰分、色相——小幅偏离正牌技术指标的那一部分。来源主要有四类：装置开停车阶段的头尾料、牌号切换时的过渡料、工艺波动导致个别指标超标的批次、副线尾料。
它仍然是原厂原生聚合粒子，分子结构和正牌一致，只是个别指标小幅浮动。要分清四个层次：正牌全指标达标、批次稳定，适合高要求制品和认证件；副牌基材与正牌一致、个别指标略偏，适合内件、配色件、一般结构件；回料是加工边角料再造粒，已经受过一次热历史；再生料是废旧塑料回收造粒，性能波动较大。副牌价格通常低于同牌号正牌，做对了场景就是省钱，用错了场景就是翻车。
中石化PP：牌号最全，副牌货源跟着基地走
中石化是国内PP产能规模领先的企业之一，装置遍布全国。代表牌号覆盖很广：T30S是经典拉丝级，编织袋和打包带常用；K8303是抗冲共聚牌号，家电和汽车内件用得多；M2600R偏医用注塑；薄壁注塑、高熔指纤维也有专门牌号。
中石化PP副牌的特点，是跟着各炼化基地的装置走，牌号多、货源散。副牌主要来自各基地的过渡料和波动批次，指标偏离幅度通常不大，批次相对可预期。对下游来说，只要把熔指和外观要求对上，中石化副牌适合做配色件、一般注塑件、拉丝制品这类对熔指波动容忍度较高的场景。缺点是牌号太杂，采购时要认准具体牌号，不能笼统说"中石化PP"。
中石油PP：西北装置开车稳，成本有底子
中石油PP依托大庆、兰州、独山子等西北老化工基地，原料和能源成本有底子。代表牌号如EPS30R是老牌抗冲共聚料，HP500N是注塑级常用料，T30S拉丝料也有稳定供应。
中石油PP副牌的特点，是西北装置开车率相对稳，副牌货源以纤维料、注塑料的过渡批次为主。因为成本结构有优势，它的副牌价格带往往比较有竞争力。适合拉丝、编织、普通注塑这类对成本敏感、对外观要求不苛刻的场景。做出口袋、周转箱、普通日用品，中石油副牌往往是算账算得过来的那一档。
东华能源PP：PDH路线起家，专用料过渡料有看头
东华能源是国内PDH路线的代表企业，丙烷脱氢制丙烯、再聚合成PP，丙烯来源单一。宁波基地有两套60万吨PDH和三套40万吨PP，张家港、淮安也有配套，PP产能约160万吨/年。代表牌号如S2040是高熔指纤维/无纺布料，V30G是注塑级常用料。
东华PP副牌的特点，是集中在纤维料和专用料的过渡批次。民营机制灵活，牌号切换频繁，过渡料供应相对稳定。对做无纺布、注塑日用品、熔喷相关制品的下游，东华的副牌在专用料这条线上有自己的位置。它不像两桶油那样牌号铺得开，但在几个专用牌号上，货源响应快。
挑国产PP副牌，三件事先做在后头
一是先测熔指。PP副牌容易波动的就是熔指，熔指偏了，填充和薄壁制品的成型窗口就变了。进厂先打熔指，对照自己模具的工艺窗口。二是，看批次量。单批副牌量小，务必留样，别一个月的用量一次吃完，出了问题对不上样。三是，用途要匹配。做透明件别拿色相偏的料，做高强度结构件别拿熔指跑偏的抗冲料。验收顺序建议：先测熔指和灰分，再上机试模，试模过了再签合同。
科隆仓库现货｜国产PP货源直供
做国产PP副牌，货源稳不稳比价格低不低更要紧。科隆仓库常备国产PP现货，主推中石化、中石油、东华能源三家品牌。
• 主推品牌：中石化、中石油、东华能源
• 主要牌号：T30S、K8303、EPS30R、S2040、V30G等常用牌号
• 包装规格：大包装、小包装都有
• 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：原厂原包直采
大包料、吨包料适合集中生产的大厂，小包副牌和箱装副牌适合中小厂试机和补单，按需调度。
选型口诀加一个真实案例
国产PP副牌选型，记住三句话：熔指先测、批次留样、用途匹配。别光看报价单上的数字，把熔指和用途对上，省下来的才是真钱。
说个真实案例。台州一家做家电注塑内件的客户，之前一直用正牌PP，原料成本压得喘不过气；试过一批回料，上机就出银纹，良率掉到82%，报废率居高不下。后来改用中石化K8303副牌，熔指实测偏差在工艺窗口内，色相偏差也在配色件可接受范围，上机试模十模次，良率拉回到96%，单吨成本比正牌降了约600元。关键不是这料多神，而是把牌号和用途对上了。
The contempt chain for domestic PP sub-brands, even when it comes to cost, they have to bow their heads
Injection molding factory owners There has always been an invisible hierarchy of disdain: those who use imported sub-brands look down on those who use domestic sub-brands; Those who use domestic sub-brands look down on those that use recycled or recycled materials. Everyone says this, but when raw material prices rise, orders are pushed down, and profits are squeezed to the corner, who still cares about this chain?
PP (polypropylene) is one of the most widely used general-purpose plastics, found everywhere in home appliance parts, auto parts, woven bags, and non-woven fabrics. Genuine brands can easily cost several thousand yuan per ton, but with market fluctuations, the price difference can be several hundred yuan; Although recycled and recycled materials are cheap, once the main unit shows silver patterns and changes color, the whole batch of products is scrapped, and no one dares to really pile recycled materials on key components. The domestic PP secondary brand is stuck in this middle. The problem is that the supply sources are so diverse—Sinopec, PetroChina, Donghua Energy—which one is more suitable for your path? This article breaks down the three and explains them clearly.
Domestic PP Structure: Two major oil giants as a base, private companies compete for the position
PP thermoplastic polymerized from propylene, low density, good rigidity, chemical resistance, and indispensable for modification and injection molding plants. Domestic PP production capacity is already close to 40 million tons per year, making the layout quite concentrated.
Looking at the enterprise tier, Sinopec's PP capacity is about 7.8 to 9.3 million tons per year, covering more than ten large refining bases such as Yanshan, Yanzi, Maoming, and Zhenhai, with over a hundred grades, and has accumulated expertise in high-melt index fiber materials, thin-walled injection molding, and medical materials; PetroChina's PP capacity is about 4.5 million to 7.6 million tons per year, relying on bases in Daqing, Lanzhou, and Dushanzi in the northwest, giving it a certain advantage in raw material costs; Among private companies, Donghua Energy features the PDH (propane dehydrogenation) route, with Ningbo, Zhangjiagang, and Huai'an bases with about 1.6 million tons per year, representing private PP specialty materials. These three basically represent the mainstream direction of domestic PP sub-brand supply.
PP What exactly is a sub-brand? Don't confuse it with recycled materials
First, clarify the concept. PP sub-brand is not waste plastic, nor is it a small generic brand produced by a small factory. It refers to the part of the same unit and product grade that, during factory inspection—the indicators — commonly melt finger, ash content, hue — slightly deviate from the official technical specifications. The sources mainly fall into four categories: the starting and shutdown materials of the plant, transition materials during grade changes, batches where process fluctuations cause some indicators to exceed standards, and secondary line tailings.
They are still original original polymerized particles with molecular structure consistent with the genuine brand, with only slight fluctuations in some indicators. Four levels must be distinguished: genuine products meet all standards, batch stability is suitable, suitable for high-demand products and certified parts; The base material for the sub-brand is consistent with the genuine brand, with some indicators slightly off, suitable for internal parts, color-matched parts, and general structural parts; Remixed material is processed scraps re-pelletized, having undergone one heat history; Recycled material is recycled from waste plastic and pelletized, with significant performance fluctuations. Sub-brand prices are usually lower than genuine brands of the same grade; if used correctly, it saves money; if used incorrectly, it can cause a failure.
Sinopec PP: The most complete grade, sub-brand supply follows the base
Sinopec is one of the leading domestic PP production capacity enterprises, with facilities nationwide. Representative grades cover a wide range: T30S is classic brushed grade, commonly used for woven bags and strapping tape; K8303 is impact-resistant copolymer grade, widely used in home appliances and automotive interiors; M2600R is more medical-grade injection molding; Thin-walled injection molding and high-melt finger fiber fibers also have specialized grades. The characteristic of
Sinopec PP sub-brands is that they follow the equipment of each refining base, with many grades and scattered supply. Sub-brands mainly come from transition materials and fluctuating batches at each base, with usually small deviations and relatively predictable batches. For downstream users, as long as the melting fingers match appearance requirements, Sinopec's sub-brands are suitable for color parts, general injection molded parts, and brushed products, which have high tolerance for melting index fluctuations. The downside is that grades are too diverse, so it's important to identify specific grades when purchasing, rather than simply calling them "Sinopec PP."
PetroChina PP: Northwest units operate steadily, with solid costs
PetroChina PP relies on aging manufacturing bases in Daqing, Lanzhou, and Dushanzi in the northwest, with solid raw material and energy costs. Representative grades include EPS30R for long-established impact-resistant copolymers, HP500N for injection-grade commonly used materials, and T30S for brushed materials with stable supply. The characteristics of
PetroChina PP sub-brands are relatively stable operating rates for northwest units, with sub-brand supply mainly consisting of transitional batches of fiber materials and injection molding. Due to cost advantages, their sub-brand prices are often competitive. Suitable for scenarios like brushing, weaving, and ordinary injection molding, where cost is sensitive and appearance requirements are not demanding. When producing pockets, turnover boxes, and ordinary daily necessities, PetroChina's sub-brand is often the one where the accounts can be managed.
Donghua Energy PP: Started with PDH route, special-purpose transition materials are worth seeing .
Donghua Energy is a representative company in China for the PDH route, with propane dehydrogenation to propylene and repolymerization to PP, with a single propylene source. The Ningbo base has two sets of 600,000-ton PDH and three sets of 400,000-ton PP, with matching supplies in Zhangjiagang and Huai'an, with a PP capacity of about 1.6 million tons per year. Representative grades include S2040 for high-melt index fiber/nonwoven fabric, and V30G for injection-grade commonly used materials.
Donghua PP's sub-brand is characterized by concentrated transitional batches of fiber and specialty materials. The private sector operates flexibly, with frequent grade switching, and relatively stable supply of transition materials. For downstream products like nonwoven fabrics, injection-molded daily necessities, and meltblown products, Donghua's sub-brand has its own position in the specialized materials line. Unlike two barrels of oil, where grades are widely spread, it responds quickly to supply on several specialized grades.
Choose domestic PP sub-brand: do three things first
First, test the melt index. The melting index of PP secondary brand is prone to fluctuation; if the melt index is off, the molding window for fillers and thin-walled products changes. When entering the factory, first check the melting finger and compare it with your own mold's process window. Second, check the batch quantity. If the quantity of the sub-brand is small per batch, be sure to keep samples; don't use up all the monthly usage at once, or if there are problems, the samples won't match. Third, the usage must match. For transparent parts, avoid materials with color offset; for high-strength structural parts, avoid impact resistance materials with misaligned melt fingers. Acceptance order suggestion: first test melt index and ash content, then test the mold on the machine; after mold testing, sign the contract.
Cologne warehouse in-stock | Direct supply of domestic PP supply
Domestic PP sub-brand, stable supply is more important than whether the price is low. Cologne warehouse always stocks domestic PP stock, mainly promoting Sinopec, PetroChina, and Donghua Energy.
• Main Brands: Sinopec, PetroChina, Donghua Energy
• Main Grades: T30S, K8303, EPS30R, S2040, V30G and other commonly used grades
• Packaging Specifications: Both large and small packages available
• Warehouse Stock: Usually 3000-6000 tons
• Small sub-brand stock: 500-800 tons, Containerized sub-brand stock 200-400 tons, large package material/ton package material stock stock 2500-4800 tons
• Supply guarantee: Direct procurement from original factory
Large package material and ton package material suitable for large factories for centralized production; small package sub-brand and containerized sub-brand are suitable for small and medium factories to test machines and supplement orders, with scheduling as needed.
Selection Mnemonic plus a real case
Domestic PP sub-brand selection, remember these three points: melt finger testing first, batch sample retention, and use matching. Don't just look at the numbers on the quotation; match the melting finger with the intended use, and the real money saved is what you save.
Tell a real case. A customer in Taizhou specializing in injection-molded home appliance parts previously used genuine PP, and raw material costs were suffocating; After testing a batch of recycled materials, silver patterns appeared immediately upon installation, yield dropped to 82%, and scrap rates remained high. Later, they switched to Sinopec K8303 sub-brand. The melting index deviation was within the process window, and the hue deviation was within the acceptable range of color matching parts. Ten mold trials on the machine brought the yield back to 96%, and the cost per ton was about 600 yuan lower than the genuine brand. The key isn't that the material is too many, but that the grade and purpose are matched
