PU这个行业，水比你想象的深。
同样叫“聚氨酯仿木料”，一吨从八千到三万都有。便宜的做出来三个月就粉化，贵的用十年还跟新的一样。中间差的是什么？不是配方，是原料的出处。
珠海有家做仿木家具部件的厂，前年图便宜拿了一批国产PU自结皮料，做出来的装饰线条冬天一扣就掉皮，客户退货率15%。去年咬咬牙上了进口正牌，一吨两万八，成本直接压不住。后来在圈子里打听才知道——进口PU副牌里，藏着一条别人不知道的成本路。
说白了，PU这行的乱象，不在PU本身，在你不知道自己买到的那桶A料、那一袋B料，是从哪个装置、哪个牌号、哪一炉出来的。
PU是什么？不是一种塑料，是一个家族
PU，全称聚氨酯（Polyurethane），是异氰酸酯和多元醇反应出来的一大类材料的统称。它不是一种塑料，是一个家族——硬泡做保温板和仿木家具，软泡做沙发和床垫，弹性体做滚轮和鞋底，涂料做木器漆，胶粘剂做复合板。
我们这篇讲的“PU副牌”，聚焦在做家具仿木部件用的那一类——硬质自结皮泡沫和PU仿木颗粒。这东西做出来像木头、能刨能钉、防水不腐，欧式家具的罗马柱、雕花线条、门套线，一大半都是PU仿木做的。
全球做PU原料和系统料的国外头部企业，按市场份额排：
巴斯夫（BASF，德国）：全球份额约22%，Elastopan/Elastollan/Elastoflex全系列；
科思创（Covestro，德国）：全球份额约16%-20%，Desmodur异氰酸酯、Desmopan热塑性聚氨酯、Desmophen多元醇；
陶氏（Dow，美国）：全球份额约12%-16%，VORANATE异氰酸酯、VORANOL多元醇。
亨斯迈（Huntsman）排第四，份额约8.7%。国内万华这两年在MDI领域追得很凶，但在家具仿木这个细分的系统料和特种多元醇上，话语权还在巴斯夫和科思创手里。
PU副牌：双组分体系里的原厂原生料
PU副牌这事，比其他塑料更绕——因为PU是双组分体系，A料（异氰酸酯）和B料（多元醇+催化剂+发泡剂）分开包装，现场混合发泡。
PU副牌的真身：原厂在装置开停车、牌号切换、工艺波动时，那批个别指标（比如NCO含量、羟值、黏度）小幅偏离正牌的A料或B料。分子结构和正牌一致，只是出厂检验时某一项没踩线。
四大来源：开停车头尾料、牌号切换过渡料、工艺波动批次、副线尾料。
边界画清楚：正牌PU系统料全指标达标，批次稳定，做高端仿木家具、出口级装饰线条；副牌PU系统料个别指标小幅浮动，做内销级仿木部件、非外露装饰件；回料PU已经过一次发泡或加工，性能无法复原，不能用于承重复合件；再生PU是废泡沫粉碎再黏合，只能做低端填充。
一句话：PU副牌是原厂原生A料或B料，不是回收料再造。
巴斯夫 BASF——PU家族的全能派
巴斯夫是PU这行产品线最全的——从MDI/TDI单体，到聚酯多元醇、聚醚多元醇，再到Elastopan（模塑泡沫）、Elastollan（TPU）、Elastoflex（软泡系统料），全链条自己做。
做仿木家具的厂对巴斯夫不陌生，它的硬质自结皮系统料在欧式装饰线条里渗透率极高。
副牌特点：巴斯夫副牌多从硬泡系统料的过渡料里出，NCO含量通常在±1%以内浮动，发泡倍率和正牌一致，只是表面结皮手感略粗。适合做内销级仿木罗马柱、门套线、非外露装饰件，不适合做出口级高光仿木家具。包装以大包装为主（A料吨桶、B料袋装），小包装也有流通。
科思创 Covestro——脱胎于拜耳的PU专精派
科思创2015年从拜耳材料科技独立出来，是PU这行的专精选手。Desmodur系列异氰酸酯、Desmophen系列多元醇、Desmopan系列TPU，在汽车和家具领域都是硬通货。科思创这两年还在推CO₂基多元醇（cardyon），是行业里的新故事。
副牌特点：科思创副牌常见的是黏度或羟值略飘，但反应活性和发泡工艺窗口不掉。做仿木家具的厂用科思创副牌，最大的好处是配方兼容性好——很多国产仿木料的配方，本来就是照着科思创系统料调的，换副牌不用大改配方。珠海那家仿木家具厂后来换的就是科思创副牌，配方几乎没动，表面结皮从粗糙调到细腻。
陶氏 Dow——多元醇和系统料的老牌劲旅
陶氏在PU领域主打VORANATE异氰酸酯和VORANOL多元醇，系统料在建筑保温和汽车内饰里用得很多。陶氏的特点是多元醇产品线全，聚醚多元醇的分子量分布控制得稳。
副牌特点：陶氏副牌的指标偏离幅度小，价格比巴斯夫和科思创略低一档，但家具仿木这个细分的货期在国内不如前两家稳。适合做对成本敏感、又需要进口多元醇基材的仿木家具内构件。
PU副牌这三个坑，家具厂踩一个就赔掉一批货
PU副牌用在家具仿木上，坑特别多。
第一坑：拿国产MDI副牌冒充进口巴斯夫/科思创副牌。MDI这东西，国产和进口的NCO含量看似差不多，但杂质含量和反应活性差一大截，做出来的仿木件表面发酥、三个月就粉化。分辨方法：看包装标签——原厂副牌有完整的批号、生产日期、产地代码；假冒副牌标签模糊、批号重号。
第二坑：A料和B料不是一个体系。PU发泡讲究A料B料配方匹配，你拿巴斯夫A料配陶氏B料，反应活性对不上，泡孔直接崩。副牌必须同厂同体系搭配。
第三坑：不分用途乱上。副牌表面结皮略粗，就别做高光外露件；发泡倍率略飘，就别做壁厚公差要求0.1mm的精密件。做内销级仿木线条和罗马柱，副牌刚好。
验收动作：进厂测三项——NCO含量（A料）、羟值（B料）、发泡倍率和表面结皮手感，留样封袋。PU是双组分体系，这三项一项都不能省。
科隆仓库现货｜PU调试
主推品牌：巴斯夫、科思创、陶氏
主要牌号：Elastopan/Elastollan/Elastoflex系列、Desmodur/Desmophen系列、VORANATE/VORANOL系列
包装规格：大包装/小包装均有备货
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
七条口诀，搞定PU副牌选型
1. 出口级高光仿木家具——上正牌；
2. 内销级仿木线条、罗马柱、门套——副牌够用；
3. 要产品线全、硬泡系统料稳——认巴斯夫Elastopan；
4. 要配方兼容、表面结皮细——认科思创Desmodur/Desmophen；
5. 要多元醇基材、成本敏感——认陶氏VORANATE/VORANOL；
6. 副牌进厂必测NCO、羟值、发泡倍率；
7. 副牌A料B料必须同厂同体系。
同牌号PU副牌硬度偏差常在±5 Shore A以内、密度公差±3%，它和正牌是同一套预聚体配方体系里出来的聚氨酯——只是NCO含量和羟值在出厂检验时多飘了半格。
珠海那家做仿木装饰线条的客户，前年用国产PU料，冬天一批线条表面掉皮，客户退货率15%；去年上进口正牌，一吨两万八，成本压不住。后来换了科思创Desmodur/Desmophen的副牌，配方几乎没动，表面掉皮率从15%压到1%以内，材料成本一吨省了八千多。一年下来光退货就少赔了四十多万。
这就是选副牌的价值——不是拿副牌去闯出口级高光家具，是在内销级仿木部件里，把PU的性能吃到八成、把成本砍掉三成。宁波市科隆新材料有限公司做进口PU副牌做了多年，巴斯夫、科思创、陶氏这三家的副牌料常年有货，家具仿木的案子每年处理几十起，说白了就是帮你把“掉不掉皮、发不发泡”这种问题，在量产之前就试清楚。
做仿木家具的、做装饰线条的、做欧式罗马柱的，谁还没被PU坑过？
是冬天一批线条掉皮？还是A料B料配错泡孔直接崩？或者国产料冒充进口副牌，三个月就粉化？
In the PU industry, the water is deeper than you think.
Also called 'polyurethane wood imitation material,' the price per ton ranges from eight thousand to thirty thousand. The cheap ones will powder after three months, while the expensive ones still look like new after ten years. What's the difference in between? It's not the formula, it's the source of the raw materials.
There is a factory in Zhuhai that makes imitation wood furniture components. Two years ago, trying to save money, they bought a batch of domestic self-skinning PU material. The decorative moldings made from it would peel off in the winter as soon as they were installed, resulting in a 15% return rate from customers. Last year, they reluctantly switched to a genuine imported brand, costing 28,000 yuan per ton, which directly squeezed the cost. Later, after asking around in the industry circle, they realized that among the imported PU sub-brands, there is a cost-saving approach that others don't know about.
To put it bluntly, the chaos in the PU industry doesn't lie in PU itself, but in the fact that you don't know which equipment, which grade, or which batch the bucket of A material or the bag of B material you bought came from.
What is PU? It is not a type of plastic, it is a family.
PU, short for Polyurethane, is a general term for a large class of materials produced by the reaction of isocyanates and polyols. It is not a type of plastic; it is a family — rigid foam is used for insulation boards and imitation wood furniture, soft foam is used for sofas and mattresses, elastomers are used for rollers and shoe soles, coatings are used for wood varnishes, and adhesives are used for composite boards.
The 'PU secondary brand' we talk about here focuses on the type used for making furniture imitation wood parts—rigid self-skinning foam and PU imitation wood particles. These materials, once made, look like wood, can be planed and nailed, are waterproof and rot-resistant. A large portion of European-style furniture's Roman columns, carved moldings, and door trims are made from PU imitation wood.
The leading foreign companies in producing PU raw materials and system materials, ranked by market share:
BASF (Germany): global market share approximately 22%, full range of Elastopan/Elastollan/Elastoflex;
Covestro (Germany): global market share approximately 16%-20%, Desmodur isocyanates, Desmopan thermoplastic polyurethane, Desmophen polyols;
Dow (USA): Global market share approximately 12%-16%, VORANATE isocyanates, VORANOL polyols.
Huntsman ranks fourth, with a market share of about 8.7%. In China, Wanhua has been aggressively pursuing the MDI field in the past two years, but in the niche areas of furniture imitation wood system materials and specialty polyols, the dominance still lies with BASF and Covestro.
PU Secondary Card: Original Factory Native Material in Two-Component System
The issue of PU secondary labels is more complicated than other plastics—because PU is a two-component system, component A (isocyanate) and component B (polyol, catalyst, foaming agent) are packaged separately and mixed on-site for foaming.
The true nature of PU sub-brands: When the original manufacturer installs the device, switches plate numbers, or experiences process fluctuations, that batch may have some individual indicators (such as NCO content, hydroxyl value, viscosity) slightly deviating from the regular A material or B material. The molecular structure is consistent with the regular brand; it's just that one item didn't meet the standard during factory inspection.
Four main sources: leftover material from starting and stopping the production line, transitional material from grade switching, batches with process fluctuations, and leftover material from secondary lines.
Clearly define the boundaries: Genuine PU system materials meet all indicators and are stable in batches, suitable for high-end imitation wood furniture and export-grade decorative moldings; secondary PU system materials have slight fluctuations in some indicators, suitable for domestic imitation wood components and non-exposed decorative parts; reclaimed PU has undergone foaming or processing once and its performance cannot be restored, and cannot be used in load-bearing composite parts; recycled PU is made by crushing and re-bonding waste foam, and can only be used for low-end filling.
In one sentence: PU sub-brands use original factory native A-grade or B-grade material, not recycled material remade.
BASF——The All-Rounder of the PU Family
BASF has the most complete product line in the PU industry—from MDI/TDI monomers to polyester polyols, polyether polyols, and then to Elastopan (molded foam), Elastollan (TPU), Elastoflex (soft foam system materials), the entire chain is made in-house.
Factories that make imitation wood furniture are not unfamiliar with BASF; its rigid self-skinning system material has a very high penetration in European-style decorative moldings.
Characteristics of secondary-grade products: BASF's secondary-grade products mostly come from transitional materials of the rigid foam system. NCO content usually fluctuates within ±1%, and the foaming ratio is the same as the primary grade, but the surface skin feels slightly rough. They are suitable for making domestic-grade imitation wood Roman columns, door frames, and non-exposed decorative parts, but not suitable for export-grade high-gloss imitation wood furniture. Packaging is mainly in large sizes (A material in ton barrels, B material in bags), though small packaging is also available.
Covestro — A PU Specialist Evolved from Bayer
Covestro became independent from Bayer MaterialScience in 2015 and is a top specialist in the PU industry. The Desmodur series of isocyanates, Desmophen series of polyols, and Desmopan series of TPU are hard currency in the automotive and furniture fields. In recent years, Covestro has also been promoting CO₂-based polyols (cardyon), which is a new story in the industry.
Characteristics of alternative brands: Common traits of Covestro alternative brands are slightly fluctuating viscosity or hydroxyl value, but their reactivity and foaming process window remain unaffected. The biggest advantage of using Covestro alternative brands in factories that make imitation wood furniture is good formula compatibility—many domestic imitation wood formulas were originally adjusted based on Covestro system materials, so switching to an alternative brand doesn't require major formula changes. The imitation wood furniture factory in Zhuhai later switched to a Covestro alternative brand, and the formula hardly changed; the surface skin texture was refined from coarse to fine.
Dow — A Veteran Leader in Polyols and System Materials
Dow mainly focuses on VORANATE isocyanates and VORANOL polyols in the PU field, and its system materials are widely used in building insulation and automotive interiors. Dow's characteristics are a complete polyol product line and well-controlled molecular weight distribution of polyether polyols.
Secondary Brand Features: The indicators of Dow's secondary brand have a small deviation, and the price is slightly lower than BASF and Covestro, but the delivery time for furniture wood-like products is less stable domestically compared to the first two. It is suitable for use in wood-like furniture inner components that are cost-sensitive yet require imported polyol-based materials.
For these three pitfalls of PU sub-brands, if a furniture factory steps on one, it will lose a batch of goods.
PU veneer is used on furniture that imitates wood, and it has a lot of pits.
Pitfall One: Using domestic MDI sub-brands to impersonate imported BASF/ Covestro sub-brands. With MDI, the domestic and imported versions might seem to have similar NCO content, but their impurity levels and reactivity are quite different. Products made from domestic MDI can result in wood-like pieces that become brittle and start powdering in just three months. How to distinguish: Look at the packaging label — genuine sub-brands from the original manufacturer have complete batch numbers, production dates, and origin codes; counterfeit sub-brands have fuzzy labels and duplicate batch numbers.
Pitfall two: Material A and Material B are not from the same system. PU foaming requires matching the formulas of Material A and Material B. If you use BASF Material A with Dow Material B, the reaction activity won't match, and the foam cells will collapse immediately. Generic brands must be paired from the same manufacturer and system.
Third pit: Using it indiscriminately regardless of purpose. If the surface of a secondary brand has slight skin formation and is a bit rough, don't use it for exposed high-gloss parts; if the foam expansion rate is a bit unstable, don't use it for precision parts with a wall thickness tolerance of 0.1mm. For domestic-grade imitation wood moldings and Roman columns, the secondary brand is just right.
Acceptance actions: Measure three items upon entering the factory — NCO content (Material A), hydroxyl value (Material B), foaming ratio, and surface skin feel, then sample and seal the bags. PU is a two-component system, and none of these three items can be omitted.
Cologne warehouse stock｜PU debugging
Main promoted brands: BASF, Covestro, Dow
Main brands: Elastopan/Elastollan/Elastoflex series, Desmodur/Desmophen series, VORANATE/VORANOL series
Packaging specifications: Both large and small packages are available in stock
Warehouse spot inventory is usually between 3,000 and 6,000 tons
Small package secondary brand stock 500-800 tons, box-packed secondary brand stock 200-400 tons, large package material/ton package material stock 2500-4800 tons
Supply Assurance: Direct sourcing from original factory packages
Seven tips to handle PU sub-brand selection
1. Export-grade high-gloss imitation wood furniture—genuine brand;
2. Domestic sales grade imitation wood molding, Roman columns, door frames—secondary brands are sufficient;
3. Complete product line and stable hard foam system materials — recognize BASF Elastopan;
4. Formula compatibility and fine surface crust — recognize Covestro Desmodur/Desmophen;
5. Polyol base materials and cost sensitivity — recognize Dow VORANATE/VORANOL;
6. Secondary brands must have NCO, hydroxyl value, and foaming ratio tested upon arrival;
7. Secondary brand A and B must be from the same factory and same system.
For PU of the same grade, secondary brand hardness deviation is often within ±5 Shore A, with a density tolerance of ±3%. It is polyurethane from the genuine brand in the same prepolymer formula system—only the NCO content and hydroxyl value are half a notch higher during factory inspection.
That Zhuhai client who does wood-like decorative moldings used domestic PU material two years ago. In winter, a batch of lines peeled on the surface, resulting in a 15% customer return rate; Last year, imported genuine brand was 28,000 yuan per ton, and costs couldn't be managed. Later, I switched to Covestro Desmodur/Desmophen sub-brands, with almost no changes in the formula. The surface peeling rate dropped from 15% to below 1%, saving over 8,000 yuan per ton in material costs. Over the course of a year, just returning goods saved me over 400,000 yuan.
This is the value of choosing a sub-brand—not to use the sub-brand to compete in export-grade high-gloss furniture, but to capture 80% of PU performance and cut costs by 30% in domestically sold imitation wood components. Ningbo Kelong New Materials Co., Ltd. has been making imported PU sub-brands for many years. BASF, Covestro, and Dow have sub-brand materials in stock year-round. They handle dozens of cases for imitation wood furniture annually. Basically, they help you test issues like "skin peeling or bubbling" before mass production.
Those who make imitation wood furniture, decorative lines, or European Roman columns—who hasn't been scammed by PU?
Is it a batch of lines peeling in winter? Or is it a batch of molds that peel off in winter? Or is it that material A and B are paired with the wrong bubbles and collapse? Or is it domestic materials passed off as imported sub-brands, and they pulverize in just three months?
