POP这个行当，水比你想的深。同样叫“聚烯烃塑性体”，一吨报价能差出一倍，性能能差出一个冬天。有人把POE当POP卖，有人把普通LLDPE混点东西冒充，还有人干脆把再生料印个洋牌子的袋子就敢上车增韧。
做改性的老板都懂，增韧剂选错一档，整批改性料的低温抗冲就崩。今天就把POP这潭水搅一搅。
一、POP是什么，谁在前三把交椅
POP，聚烯烃塑性体（Polyolefin Plastomer），用茂金属催化做出来的乙烯-α烯烃共聚物。它跟POE是亲戚，但密度比POE高一点、更偏塑料那一头，特点是软而韧、透明、跟聚烯烃相容好，做增韧剂和软包装膜都吃香。
全球做POP的国外玩家很集中，前三大加起来占全球销量六成以上。头一把交椅是陶氏（Dow），AFFINITY系列按产量份额占着全球三成多；第二是日本三井化学（Mitsui Chemicals），TAFMER系列在新加坡有大基地；第三是韩国LG化学。北欧化工、SK（通过SSNC）也有份。这个赛道国内还没实现商业化生产，全靠进口。
POP跟POE到底啥区别？一句话：都是茂金属做的乙烯-α烯烃共聚物，差别在密度和共聚单体比例。POP密度偏高一点、偏塑料那一头，模量和挺性好；POE更软更弹、密度更低。做增韧改性要的是“加点料就让PP/PE抗冲提上去”，POP和POE都能干，但牌号选错一档，加同样的份数效果能差出一大截。
二、POP副牌是什么，别跟普通茂金属料混
POP副牌上车增韧，先把密度卡到对应那一档、熔指对上挤出工艺、低温抗冲验完样再下单——别跳过打样直接上量产。它不是性能飘的便宜货，是陶氏、三井这些厂同一条茂金属聚合线上，出厂检验熔指或密度小幅偏离正牌的那一档原厂原生粒子。四大来源照旧：开停车头尾料、牌号切换过渡料、工艺波动批次、副线尾料。
关键要拎清：POP副牌分子结构和正牌同源，还是茂金属原生粒子，只是熔指、密度那项化验时飘了半格。回料是改性厂边角再造粒，已经吃过热历史；再生料更别提。POP这类料有小包装也有大包装。别把普通茂金属LLDPE当POP收——它俩密度和模量差着档次呢。
做增韧的老板最该记住一件事：增韧剂是改性配方里的“心脏”，心脏跳得稳不稳，直接决定整批料的低温抗冲。副牌POP常见的漂移就在熔指和密度，熔指差一点，挤出机喂料和分散全变；密度差一点，增韧效率跟着掉。所以上车之前，熔指密度必须对着你的改性配方复测，别光看袋子上的原厂标。
三、陶氏AFFINITY：茂金属的老玩家
主角陶氏AFFINITY。陶氏是茂金属聚烯烃的老玩家，INSITE催化技术是它家的看家本领，AFFINITY POP专门做软包装密封层和增韧。它在西班牙、美国、泰国有生产基地。
AFFINITY副牌的特点：因为产量大、牌号多，副牌来源稳。常见的是熔指或密度偏一档的料，做PP/PE增韧改性、软包装膜、封层完全够，做不了那种要求极低密度和超高透明的旗舰膜。
四、三井化学TAFMER：分子量分布窄
第二家日本三井化学。TAFMER是它家聚烯烃弹性体/塑性体的招牌，茂金属催化做得精细，在新加坡裕廊岛有大基地，还在扩产。TAFMER在汽车增韧和软触件上口碑扎实。
TAFMER副牌的特点是批次稳、分子量分布窄，适合做要求力学性能均匀的增韧改性和软质件。它的货量不如陶氏大，但性能一致性好。
五、LG化学：性价比路线
第三家韩国LG化学。LG在聚烯烃这块是全产业链打法，POP走的是性价比路线，做汽车改性和包装膜。它的特点是供货稳、价格比陶氏三井亲民。
LG副牌的特点是适合做对成本敏感的通用增韧和内件。但它在极端低温和超高透明这块的表现，跟陶氏AFFINITY还有距离。
六、买POP副牌上车增韧，坑在这三处
一是POP和POE别混。POP密度偏高偏塑料，POE更软更弹，增韧场景选错一档，低温抗冲就崩。
二是熔指密度对着改性配方测。副牌最容易飘的就是这两项，熔指差一点，挤出流动性全变。
三是分清原厂副牌和再生料。再生POP性能飘得没边，拉一拉、看切面、测熔指，心里就有数。建议：密度卡到对应档、熔指对上挤出工艺、低温抗冲打样验过再上量。
科隆仓库现货｜POP省内
主推品牌：陶氏、三井化学、LG化学。
主要牌号：AFFINITY、TAFMER、LG化学POP。
包装规格：小包副牌与箱装副牌走小包装，大包料/吨包料走吨袋，按车间用量分包装备货。
仓库现货：POP仓库现货通常在3000-6000吨，其中小包副牌备货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，批号随货。
七、选型口诀
1. POP副牌先分POP/POE，增韧场景别选错。
2. 密度卡档、熔指对工艺，低温抗冲打样再上。
3. 原厂副牌和再生料分清楚，性能飘的一上机就崩。
4. 陶氏三井LG是三家正主，别家洋牌子多留心。
5. 小包装大包装都有，按改性挤出线用量订。
八、写在最后
莆田有家做汽车改性料的客户，之前增韧剂一直用正牌POP，一吨压下来成本降不动，换过几批便宜货，结果改性PP的低温抗冲不过关，一批保险杠下饰件冬天装机就裂，退货率一度到9%。后来按陶氏AFFINITY副牌的熔指密度档重新对增韧配方，把低温悬臂梁冲击卡到合格线以上，装机合格率从原来的88%拉到99%，退货率压到0.3%，增韧剂这一项成本省了近两成。
这就是把熔指密度验准的账。宁波市科隆新材料有限公司做进口副牌多年，类似的汽车改性案子一年经手不少，说白了就是帮你把增韧那档在量产前测明白。
POP this industry, the water is deeper than you think. Even with the same name "polyolefin plasticizer," the price per ton can be twice as high, and its performance can last a whole winter. Some people sell POE as POP, some mix in ordinary LLDPE to pass off, and some even boldly add toughness to bags printed with foreign brands on recycled materials.
Every modifier knows that choosing the wrong toughening agent can cause the entire batch of modified material to collapse in low-temperature shock resistance. Today, let's stir up the POP pool.
1. What is POP, and who is in the top three?
POP Polyolefin Plastomer, an ethylene-α olefin copolymer made by metallocene catalysis. It is related to POE, but its density is slightly higher and more plastic-oriented. Its features are softness, toughness, transparency, and compatibility with polyolefins, making it popular as a toughening agent and flexible packaging film.
Foreign players in POP are highly concentrated globally, with the top three together accounting for over 60% of global sales. The top spot is Dow, with the AFFINITY series accounting for over 30% of global production; Second is Japan's Mitsui Chemicals, whose TAFMER series has a large base in Singapore; Third is South Korea's LG Chem. Nordic Chemicals and SK (via SSNC) also have a contribution. This track has not yet achieved commercial production domestically and relies entirely on imports. What exactly is the difference between
POP and POE? In short: both are ethylene-α olefin copolymers made of metallocene, differing in density and copolymer monomer ratio. The higher density, plastic-leaning end of POP has better modulus and stiffness; POE is softer, more elastic, and less dense. For toughening modification, the key is to "add some material and make PP/PE more resistant to impact lifting." Both POP and POE can do this, but if you choose the wrong grade, adding the same amount of parts can yield a significant difference.
2. What is POP sub-brand? Don't mix it with ordinary metallocene materials
POP sub-brand to build toughness. First, set the density to the corresponding level, align the melting fingers with the extrusion process, and test low-temperature flushing before ordering—don't skip prototyping and go straight to mass production. It's not a cheap product with high performance; it's the original factory virgin particle on the same metallocene polymer line from Dow and Mitsui, where the melting finger or density slightly deviates from the genuine grade at the factory. The four main sources remain the same: start-stop tail material, grade switching transition material, process fluctuation batch, and auxiliary line tail material.
The key is to understand: the molecular structure of the POP secondary brand is the same as the genuine brand, and it's still a metallocene primary particle. It's just that the melting finger and density tests showed a half-notch float. Remixed material is granulation from the corners of modified plants, which has a history of overheating; Recycled materials are even more so. POP materials come in both small and large packages. Don't treat ordinary metallocene LLDPE as POP—their density and modulus are on a different level.
Toughening bosses should remember one thing: toughening agents are the "heart" of the modified formula. Whether the heart beats steadily directly determines the low-temperature impact resistance of the entire batch. Common drift in secondary POP is in melting fingers and density. If the melting finger is weak, the extruder feed and dispersion completely change; If density is lower, toughening efficiency drops accordingly. So before getting on the car, melting finger density must be retested against your modified formula, not just by the original factory label on the bag.
3. Dow AFFINITY: A veteran player in metallocene
The protagonist Dow AFFINITY. Dow is a veteran player in metallocene polyolefins, with INSITE catalysis technology as its specialty. AFFINITY POP specializes in flexible packaging sealing and toughening layers. It has production bases in Spain, the United States, and Thailand.
AFFINITY characteristics of sub-brands: due to large output and many grades, sub-brands have stable sources. Common materials are melted fingers or densities in a certain range, fully sufficient for PP/PE toughening modification, flexible packaging films, and sealing layers, but cannot produce flagship films requiring extremely low density and ultra-high transparency.
4. Mitsui Chemicals TAFMER: narrow molecular weight distribution
Second is Mitsui Chemicals from Japan. TAFMER is their signature polyolefin elastomer/plastic body, with refined metallocene catalysis, a large base on Jurong Island, Singapore, and ongoing expansion. TAFMER has a solid reputation for automotive toughening and soft contact parts.
TAFMER sub-brand features stable batch size and narrow molecular weight distribution, suitable for toughening modification and soft parts requiring uniform mechanical properties. Its volume is not as large as Dow's, but its performance consistency is good.
5. LG Chem: Cost-performance route
Third Korean LG Chem. LG takes a full industry chain approach in polyolefins, while POP follows a cost-effective approach, specializing in automotive modification and packaging films. Its features are stable supply and more affordable prices than Dow Mitsui.
LG secondary brand is suitable for cost-sensitive general toughening and internal parts. But its performance in extreme low temperatures and ultra-high transparency still lags behind Dow AFFINITY.
6. Buying POP secondary brands to build toughness—these three pitfalls
First, don't mix POP and POE. POP has higher density and is more plastic, while POE is softer and more elastic. If you choose the wrong toughening level, low-temperature impact resistance will collapse.
Second, test the melting finger density against the modified formula. These are the two things that make secondary brands the most prone to floating; if the melting fingers are a bit weak, the flow when squeezed out completely changes.
Third, distinguish between original secondary brands and recycled materials. Regenerated POP performance is impressive; pull, inspect cross-section, and measure melt fingers, and you'll have a clear idea. Suggestion: Set density to the corresponding level, melt fingers align with extrusion process, low-temperature shock resistance sample testing before increasing volume.
Cologne warehouse in-stock | POP within the province
Main recommended brands: Dow, Mitsui Chemical, LG Chem.
Main grades: AFFINITY, TAFMER, LG Chem POP.
Packaging specifications: small sub-brand and boxed sub-brand use small packaging; large package/ton packaging is sold in ton bags, sorted by workshop usage for packaging.
Warehouse Stock: POP warehouse stock is usually 3000-6000 tons, with 500-800 tons for small sub-brands, 200-400 tons for boxed sub-labels, and 2500-4800 tons for large packages/tons.
Supply Guarantee: Direct procurement from the original factory and packaging, batch number follows the goods.
7. Model Selection Tips
1. POP sub-brands are first divided into POP/POE types; don't choose the wrong toughness scenario.
2. Density blocking and melting fingers match processes, then low-temperature anti-impact sample application.
3. Distinguish between original sub-brand and recycled materials; performance will break as soon as the machine is installed.
4. Dow Mitsui LG is the main brand among the three brands; other foreign brands should be cautious.
5. Both small and large packages are available, ordered according to the amount used on the modified extrusion line.
Eight, Final Thoughts
Putian, a customer specializing in automotive modified materials, previously used genuine POP for toughening agents, but the cost per ton couldn't be reduced. After switching to several batches of cheap parts, the low-temperature resistance of modified PP failed to meet standards. One batch of bumper lower trim cracked during winter assembly, with a return rate once reaching 9%. Later, the toughening formula was redesigned according to the melting finger density level of Dow AFFINITY's secondary brand, pushing the low-temperature cantilever beam impact above the qualification line. The installation pass rate was raised from 88% to 99%, and the return rate was reduced to 0.3%, saving nearly 20% of the toughening agent cost.
This is the account of verifying melting finger density. Ningbo Kelong New Materials Co., Ltd. has been doing imported sub-brand for many years and handles many similar automotive modification cases annually. In other words, they help you accurately test toughening before mass production
