做材料这行，有个心照不宣的鄙视链：
做PEEK、LCP的，看不起做PC、PA的；做PC、PA的，又看不起做PP、PE的。理由也直白——PP便宜、技术门槛低，谁都能切两刀，做这行显不出身价。
但你猜怎么着？每年冬天在仓库里翻车翻得凶的，恰恰是这些"没身价"的PP。周转筐冻裂了，家电外壳翘得扣不上，一退就是一整车。老板骂采购，采购骂供应商，供应商回一句"你牌号没选对"。一圈绕下来，锅又扣回PP头上。
说白了，不是PP不行，是很多人只盯着正牌报价单，压根没搞懂PP还有个被妖魔化的中间选项——副牌。这篇就把PP这个品类、全球三家靠得住的国外大厂，以及它们的副牌到底能不能用，一次说透。
PP这东西，轻到能浮在水上
PP学名聚丙烯，丙烯单体聚合出来的结晶性通用塑料。密度0.90上下，比水还轻，是常用塑料里数得着的"瘦子"。耐得了沸水，扛得住酸碱，成型温度宽，设备不挑人，几乎是注塑厂的口粮料。
它的世界格局很集中。全球PP产能前几名里，挤掉中石化、中石油这些大陆厂商，海外阵营里常年排在前面的有这么几家：利安德巴塞尔（LyondellBasell，荷兰）、沙特基础工业SABIC、北欧化工Borealis（奥地利）、埃克森美孚ExxonMobil（美国）。不同研报口径略有出入——有的按产能、有的按市场份额，第二、第三名常来回换。但共识很一致：利安德巴塞尔稳坐头排，PP牌号体系和聚合技术输出给全球无数工厂，是这个圈子绕不开的名字。
正牌PP贵到压不下成本，副牌没试机就上机，冬天一柜周转筐全裂
先把概念掰扯清楚，这是用副牌的前提。
副牌，指的是同一厂家、同一牌号产品里，出厂检验没完全达到正牌技术指标的那部分。同一批聚合产物，指标全达标贴正牌标签，个别指标小幅没够着，就是副牌。它还是原厂原生粒子，分子结构跟正牌是一伙的，不是废旧料回炉再造粒。
它从哪来？主要四个口子：装置开停车时的不稳定料（头尾料）、牌号切换时的过渡料、工艺波动导致熔指或色相小幅偏离的批次、副线尾料。
这里有个边界必须分清，别拿副牌当回料坑自己：
| 类型 | 来源 | 品质 | 典型用途 |
|---|
| 正牌 | 原厂达标批次 | 全指标达标、批次稳定 | 高要求件、认证件 |
| 副牌 | 原厂未达标批次 | 个别指标小幅偏离，基材与正牌一致 | 内件、配色件、一般结构件 |
| 回料/水口料 | 制品加工边角料再造粒 | 已受过一次热历史 | 低要求件 |
| 再生料 | 废旧塑料回收造粒 | 性能波动大 | 低端件、填充 |
一句话：副牌的"出身"是原厂，回料的"出身"是废品堆。两者差着辈分。
利安德巴塞尔：Moplen一出手，行业都认
利安德巴塞尔总部在荷兰鹿特丹，聚烯烃领域的老牌劲旅，PP产能和技术输出常年排在全球前列，光欧洲PP产能就有两百多万吨一年。它家的招牌PP系列叫Moplen，做注塑、纤维、薄膜的人基本都听过这个名字。
它的副牌特点很鲜明：装置规模大、牌号切换频繁，过渡料和波动批次相对多，但因为聚合体系成熟，副牌粒子的基材稳定性在一众大厂里口碑靠前。Moplen的均聚、嵌段共聚牌号，副牌流出来常落在熔指、色相这种"看着不碍事"的指标上，拿去做配色外壳、非外观结构件，性价比很能打。适用场景：家电内壳、周转筐、日用品注塑。
埃克森美孚：Achieve这条线，走的是精细路子
埃克森美孚是美国能源化工巨头，PP业务藏在它的化工板块里。它家比较有特色的是茂金属催化的PP系列，牌号走Achieve这条线，普通注塑PP则直接用ExxonMobil PP品牌。
埃克森美孚的副牌，贵在原料一体化——上游炼化自己供丙烯，基材纯度高、灰分控制得稳。它流出的副牌常集中在高熔指薄壁料和透明料上，个别透光或光泽指标小幅没踩线。这种料拿去做对透明度要求不高、但对白度和表面有要求的餐具、收纳件、薄壁包装，是降本的好手。适用场景：薄壁注塑、透明日用品、包装容器。
北欧化工：Borflow系，管道和耐候是看家本领
北欧化工Borealis总部在奥地利维也纳，背靠北欧和中东的原料，PP技术以Borstar双峰工艺出名，管道料Borflow、医疗料Bormed都是圈子里的硬通货。
它的副牌特点是"料好但量少"。因为主打中高端，流出的副牌批次不大，但基材韧性和耐候性底子好，常落在低温冲击或熔指小幅浮动上。拿去做户外周转筐、汽车内饰基层、需要一定耐候的件，比一般副牌更扛造。适用场景：户外结构件、汽车基层、管材配件。
挑副牌，这几个坑别再踩
知道了谁出货，还得知道怎么挑。副牌这东西，同样叫"大厂PP副牌"，坑却不少。
一看批次稳定。副牌天然带波动属性，下单前先要小批量试机，熔指、灰分、缺口冲击这几项自己测一遍，别光看供应商给的检测报告。二看偏离方向。熔指偏高还是偏低、黄变还是透光差，要对着你产品的短板去匹配——你做外观件就别碰色相差的，你做结构件就别接熔指飘得离谱的。三看包装溯源。正规大厂副牌流出时，分大包装、小包装两种，袋子上的原厂标识和批次号要能对上，别买到挂羊头卖狗肉的贴牌货。
还有个常见的坑：把不同厂的副牌掺着用。两家副牌的波动方向不一样，混在一起就是"失稳叠buff"，良率掉得你怀疑人生。
科隆仓库现货｜PP货源
主推品牌：利安德巴塞尔、埃克森美孚、北欧化工
主要牌号：Moplen、Achieve、Borflow/Bormed
包装规格：大包装、小包装均有现货
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
慈溪那家做周转筐的，把这笔账算明白了
浙江慈溪有家做家电外壳和果蔬周转筐的厂，前两年一直纠结：正牌Moplen太贵，一吨压着成本；回料不敢上，怕客户验货翻船。
后来他们试着切了一批利安德巴塞尔的副牌嵌段共聚PP，专做周转筐这种非外观结构件。下料前先测熔指和低温冲击，确认偏离方向不影响使用，再上机。算下来，材料一吨省了小三百，而冬天周转筐的开裂率从原先的8%压到了1%出头，良率拉到95%以上。
这就是副牌的价值——不是让你拿它顶正牌的活，是让你在"不要求高指标"的件上，把钱省得明明白白。宁波市科隆新材料有限公司做进口大厂副牌料这些年，类似的案子每年处理不少，说白了就是帮你把"正牌贵、回料险"中间那段空档填上。
九句口诀，PP副牌怎么挑
1. 非外观结构件，才是副牌的主战场；
2. 外观件、认证件，老老实实上正牌；
3. 先认厂：利安德巴塞尔、埃克森美孚、北欧化工，原厂流出才踏实；
4. 熔指、色相小幅飘的副牌，配色件、内件随便用；
5. 怕低温开裂，挑嵌段共聚副牌，别碰均聚；
6. 小批量试机、自己测指标，别信一张嘴；
7. 包装看原厂标识，大包装小包装都要能溯源；
8. 不同厂副牌别混着用，波动方向会打架；
9. 留样备查，出问题能追到批次。
做注塑的、做采购的、做设计的，谁还没在PP上栽过？
是冬天裂了一柜周转筐？还是厚壁家电壳翘得扣不上？或者图便宜买了"副牌"，上机才发现是回料？
In the materials industry, there is an unspoken hierarchy of contempt:
Those who work with PEEK and LCP look down on those who work with PC and PA; those who work with PC and PA, in turn, look down on those who work with PP and PE. The reason is straightforward—PP is cheap and the technical threshold is low; anyone can make a few cuts, so working in this field doesn’t show one’s value.
But guess what? Every winter, the ones that get damaged the most in the warehouse are precisely these 'worthless' PP items. The turnover baskets crack from the cold, the appliance casings warp so the lids won't fit, and when returned, it's a whole truckload at a time. The boss yells at the buyers, the buyers yell at the suppliers, and the suppliers respond, 'You didn't choose the right grade.' After going around in a circle, the blame lands back on the PP.
To put it bluntly, it's not that PP is unusable; it's that many people only focus on the official price list and haven't really understood that PP also has a demonized middle option — the secondary brand. This article will fully explain the PP category, three reliable foreign manufacturers worldwide, and whether their secondary brands are actually usable.
PP is so light that it can float on water
PP, scientifically named polypropylene, is a crystalline general-purpose plastic polymerized from propylene monomers. Its density is around 0.90, lighter than water, making it a rare 'slim' plastic among commonly used plastics. It can withstand boiling water, resist acids and bases, has a wide forming temperature range, is not picky about equipment, and is almost the staple material of injection molding factories.
Its world landscape is very concentrated. Among the top global PP producers, when excluding mainland manufacturers like Sinopec and CNPC, the overseas players that have consistently ranked at the top include: LyondellBasell (Netherlands), Saudi Basic Industries SABIC, Nordic Chemicals Borealis (Austria), and ExxonMobil (USA). Different research reports vary slightly in their criteria—some by capacity, some by market share—so the second and third positions often exchange places. But the consensus is clear: LyondellBasell firmly holds the top spot, with its PP grade system and polymerization technology supplied to countless factories worldwide, making it an unavoidable name in this circle.
The main brand PP is so expensive that the cost can't be reduced, the sub-brand is used on the machine without testing, and in winter, a whole cabinet of turnover baskets all crack.
First, clarify the concept; this is the premise for using a side deck.
Second-grade products refer to the portion of products from the same manufacturer and the same brand that do not fully meet the technical specifications of the standard-grade products during factory inspection. Within the same batch of polymer products, those that fully meet the standards are labeled as standard-grade, while those that slightly fall short in certain specifications are considered second-grade. They are still original particles from the factory, with molecular structures consistent with the standard-grade products, and are not recycled materials that have been remade into pellets.
Where does it come from? Mainly from four sources: unstable material when the equipment starts or stops (head and tail material), transitional material during grade switching, batches with slight deviations in melt index or color tone caused by process fluctuations, and leftover material from secondary lines.
There is a boundary that must be clearly distinguished here; don’t use a side card as the main card and trap yourself.
| Type | Source | Quality | Typical uses |
|---|
| genuine brand | Original factory standard batch | All indicators meet the standards, batch stability | High-requirement parts, certified parts |
| Side deck | Original factory substandard batch | Individual indicators slightly deviate, but the base material is consistent with the genuine brand | Internal parts, color-matched parts, general structural parts |
| Recycled material / Sprue material | Regranulation of processing scraps | Has undergone one heat history | Low requirement part |
| Recycled material | Recycled Plastic Pelletizing | Performance fluctuates greatly | low-end components, fillers |
In a word: the 'origin' of the sub-brand is the original factory, while the 'origin' of recycled material is the scrap pile. There is a generational difference between the two.
LyondellBasell: Once Moplen is launched, the industry acknowledges it
LyondellBasell's headquarters is in Rotterdam, the Netherlands. It is a veteran in the polyolefin field, with PP production capacity and technology exports consistently ranking among the top in the world. In Europe alone, its PP production capacity exceeds two million tons per year. Its signature PP series is called Moplen, a name familiar to anyone working with injection molding, fibers, or films.
Its secondary grades have very distinctive characteristics: large-scale equipment, frequent grade switching, and relatively many transitional and fluctuating batches. However, because the polymerization system is mature, the substrate stability of the secondary grade particles is highly regarded among major manufacturers. The Moplen homopolymer and block copolymer grades often come out with secondary grades falling on indicators like melt index and color, which 'look harmless.' They are suitable for making colored housings and non-appearance structural parts, offering very good cost-performance. Applicable scenarios: appliance inner shells, storage baskets, and daily-use injection-molded products.
ExxonMobil: The Achieve line takes a precise approach
ExxonMobil is an American energy and chemical giant, and its PP business is tucked into its chemical sector. What is relatively distinctive about it is the metallocene-catalyzed PP series, with grades following the Achieve line, while regular injection molding PP directly uses the ExxonMobil PP brand.
ExxonMobil's secondary brand is valuable because of integrated raw materials—it supplies propylene from its own upstream refining and chemical processes, ensuring high purity and stable ash control of the base material. The secondary brand products are often concentrated in high melt index thin-wall materials and transparent materials, with only a few showing slight deviations in translucency or gloss. These materials are suitable for manufacturing tableware and storage products with high whiteness and surface requirements but not strict transparency requirements, as well as thin-wall packaging, making them a good option for cost reduction. Applicable scenarios: thin-wall injection molding, transparent daily necessities, packaging containers.
Nordic Chemicals: Borflow series, piping and weather resistance are its specialty
Borealis, the Nordic chemical company, is headquartered in Vienna, Austria, relying on raw materials from Northern Europe and the Middle East. Its PP technology is famous for the Borstar bimodal process, and its pipe materials Borflow and medical materials Bormed are hard currency in the industry.
Its secondary brand is characterized by 'good material but small quantity.' Because it mainly targets the mid-to-high-end market, the batches of the secondary brand released are not large, but the base material has good toughness and weather resistance, often only showing slight variations in low-temperature impact or melt index. It can be used for outdoor turnover baskets, automotive interior substrates, and parts requiring certain weather resistance, performing better than ordinary secondary brands. Suitable applications: outdoor structural parts, automotive substrates, pipe fittings.
Choosing a secondary brand, avoid these pitfalls
Knowing who supplies the goods is one thing, but you also need to know how to pick them. Sub-brands, even when called 'big factory PP sub-brands,' have quite a few pitfalls.
First, check batch stability. Secondary brands naturally have fluctuating properties, so before placing an order, you should first do a small-scale trial run. Measure melt index, ash content, and notch impact yourself; don’t just rely on the supplier’s test report. Second, check the deviation direction. Whether the melt index is too high or too low, or there’s yellowing or poor light transmission, it should match the weaknesses of your product—you shouldn’t use materials with color variations for appearance parts, nor materials with wildly fluctuating melt index for structural parts. Third, check packaging traceability. When secondary brands from reputable manufacturers are released, they come in large and small packages. The original manufacturer’s markings and batch numbers on the bags should match—don’t buy rebranded products pretending to be something they’re not.
There's another common pitfall: mixing sub-brands from different manufacturers. The fluctuation directions of the two sub-brands are different, and mixing them together is 'unstable stacked buffs,' causing the yield rate to drop to the point where you'll question your life.
Cologne Warehouse Spot｜PP Supply
Main recommended brands: LyondellBasell, ExxonMobil, Borealis
Main grades: Moplen, Achieve, Borflow/Bormed
Packaging specifications: both large and small packages are in stock
The warehouse usually has 3,000-6,000 tons of spot goods: 500-800 tons of small-pack secondary brand in stock, 200-400 tons of boxed secondary brand in stock, and 2,500-4,800 tons of large-pack/tonne-pack material in stock.
Supply Guarantee: Direct procurement from the original factory with original packaging
That company in Cixi that makes turnover baskets, settle this account clearly.
There is a factory in Cixi, Zhejiang that makes household appliance shells and fruit and vegetable turnover baskets. In the past two years, they were stuck: the branded Moplen was too expensive, costing a fortune per ton; they dared not use recycled material, fearing inspection failures by clients.
Later, they tried using a batch of Liande-BASF's secondary brand block copolymer PP, specifically for turnover baskets, which are non-appearance structural parts. Before molding, they first tested melt flow and low-temperature impact, confirming that deviations would not affect use, and then ran the machines. As a result, material costs were reduced by nearly 300 yuan per ton, and the cracking rate of turnover baskets in winter dropped from 8% to just above 1%, with yield going above 95%.
This is the value of secondary brands—not to replace branded material in high-spec jobs, but to clearly save money on parts that don't require high performance. Ningbo Cologne New Materials Co., Ltd. has been handling secondary-branded materials from major imported manufacturers for years. Similar cases are processed every year, essentially filling the gap between "branded material is expensive, recycled material is risky."
Nine Rules of Thumb: How to Choose PP Secondary Brands
1. Non-appearance structural parts are the main battlefield for secondary brands;
2. For appearance or certified parts, stick with the branded material;
3. First, recognize the factory: Liande-BASF, ExxonMobil, Borealis – only material directly from the original factory is reliable;
4. Secondary brands with slight deviations in melt flow and color can be used freely for colored or internal parts;
5. To avoid low-temperature cracking, choose block copolymer secondary brands; avoid homopolymers;
6. Test in small batches, measure properties yourself, don’t just take someone’s word;
7. Check packaging for original factory labels; both large and small packages should be traceable;
8. Do not mix secondary brands from different factories; fluctuations may conflict;
9. Keep samples for reference, so batches can be traced if issues arise.
Those who do injection molding, procurement, or design – who hasn’t encountered pitfalls with PP?
Was it cracking a whole batch of turnover baskets in winter? Or thick-walled appliance shells warping and not snapping together? Or buying a "secondary brand" to save money, only to find out it was recycled material once molding started?
