01 同一个牌号，报价能差出三成
PA610这个料，水比你想象的深。
你拿着同一个牌号去问三家，报价能差出三成。差价低的那一家，问他要质保书，今天发一份、明天换一份，批号对不上，检测报告像是套模板。你还不敢不要——刷丝、轴承这些工业件，尺寸飘一点，装上去就是废品。
更坑的是，有人拿PA66改、拿PA6掺，当PA610卖。外行看颗粒差不多，上机一吸水，尺寸全跑偏。工业件厂老板圈子里有句话：买PA610不怕贵，怕的是花了PA610的钱，买回去一堆PA6的身子。
这篇就把PA610这档料捋直：它和PA6、PA66差在哪，全球盘子握在谁手里，副牌又怎么挑才不踩雷。
02 PA610是什么，凭什么尺寸稳得住
PA610，学名聚酰胺610，由己二胺和癸二酸缩聚而成。癸二酸这东西，是从蓖麻油里一步步提炼出来的，所以PA610有六成多原料来自可再生资源，这在尼龙里不多见。
它和PA6、PA66的关键差别在吸水。长碳链让它的酰胺基密度更低，吸水率比PA6低一大截，吸湿后尺寸变化小、刚性保持好，还耐油、耐化学、韧性够。做工业刷丝、钓鱼线、滑雪靴、精密轴承、齿轮、油气管路，都找它。
这个市场不大，但门槛不低。据Dataintelo口径，PA610是集中度较高的细分市场，排在前面的三家国外大厂是：德国巴斯夫（BASF）、瑞士EMS-GRIVORY、美国杜邦Zytel系列（其高性能尼龙业务现归属塞拉尼斯Celanese）。DOMO的DOMAMID长碳链尼龙也在同一梯队。
03 副牌不是掺假，是吸水那条线在浮动
先把定义讲透。副牌，是同一厂家同一牌号里，出厂检验没完全达到正牌指标的那一部分。来源就四类：开停车头尾料、牌号切换过渡料、工艺波动致个别指标小幅超标的批次、副线尾料。
PA610副牌，浮动的多在熔指、粘度、含水率这几项。这里有一句痛点要记住：
正牌PA610贵到刷丝轴承舍不得用，回料PA610一吸水尺寸就飘，一上机公差全跑偏。
它和回料、再生料的界限必须拎清。回料是加工边角料再造粒，受过一次热历史，分子量已经降过；再生料是废旧尼龙回收造粒，吸水和尺寸稳定性都没谱。而原厂PA610副牌，还是原生聚合粒子，长碳链那套低吸水底子没动。工业件用回料，尺寸公差就是在赌。
04 巴斯夫：Ultramid长碳链的老牌玩家
德国巴斯夫，尼龙品牌叫Ultramid，产品线覆盖PA6、PA66以及PA610等长碳链尼龙。据Dataintelo口径，巴斯夫在PA610市场凭借一体化供应链和多基地产能，占据份额靠前的位置。
它的副牌特点是：粘度或熔指小幅浮动，但低吸水、耐油的基材性能没动。做工业结构件、油气管路、一般机械件，挑对副档，尺寸稳定性站得住。
05 EMS-GRIVORY：把蓖麻油路线走到底
瑞士EMS-GRIVORY，PA610牌号叫Grilamid 2S。据其官网，Grilamid 2S由己二胺和癸二酸缩聚而成，其中癸二酸来自蓖麻油，聚合物约六成二来自可再生原料，GreenLine系列就是它的主打。
它的副牌，常见情况是粘度或含水率在出厂边缘浮动。做对尺寸稳定性要求高的精密件、刷丝、轴承保持架，挑精选副档，低吸水这一项不打折。
06 杜邦Zytel：长碳链尼龙的技术源头
美国杜邦的Zytel系列，是尼龙界的老牌招牌；据Biesterfeld等渠道资料，其PA610、PA610/1010等长碳链牌号现归属塞拉尼斯Celanese运营，但Zytel牌号名仍在。杜邦在长碳链尼龙上的技术积累，业内公认。
它的副牌，往往是熔指或增强比例轻微偏离正牌。做玻纤增强结构件、耐油耐化学件，挑对副档，强度和尺寸都在线。
07 买PA610副牌，先分清你买的是610还是6
PA610副牌验收，抓三件事。
先验牌号和料源，测密度、测含水率、看DSC熔点，别让PA6、PA66改头换面混进来。再看粘度和熔指，长碳链尼龙对粘度敏感，粘度飘一截，拉丝和注塑都受影响。后看原厂原包，大包装小包装都行，但批号、质保书要对得上。
常见的坑是：拿PA6掺PA66当PA610卖，吸水后尺寸飘出公差；或者把含水率偏高的副牌直接上机，制品发泡、表面起泡。工业件拼的是尺寸稳定，吸水这一项，烘料和选材都省不得。
科隆仓库现货｜PA610旺季
主推品牌：巴斯夫、EMS-GRIVORY、杜邦Zytel
主要牌号：Ultramid系列、Grilamid 2S GreenLine、Zytel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
08 八句口诀，外加一个南昌的案子
给你一个能直接照做的选型口诀：
要低吸水、要尺寸稳——先看PA610，别硬上PA6；
工业件要求高——认准巴斯夫、EMS-GRIVORY、杜邦Zytel；
料源——测密度、测熔点，别让PA6/PA66混进来；
粘度熔指——拉丝注塑都看它；
含水率——上机前烘料，表面不起泡；
回料再生料——别当副牌买，分子量已降；
大包装小包装——原厂原包、批号可溯才签；
量产——先小样测尺寸，留样再放量。
南昌有家做工业刷丝和轴承的客户，之前图便宜买了来路不明的“PA610”，拉丝后一遇潮，刷丝直径公差飘出一大截，装机后噪音和磨损都超标，一批货返工率到15%。
后来改用进口大厂PA610的精选副牌，含水率和粘度实测与正牌偏差很小，吸湿后尺寸变化率控制在规格内，刷丝和轴承公差一次做稳，返工率压到0.5%以内，一吨料成本还下来一截。
01 The same grade, the price quote can differ by 30%
The PA610 material is deeper than you think.
If you go to three different suppliers with the same brand, the quotes can differ by 30%. For the one with the lower price, when you ask for a warranty certificate, they might issue one today and a different one tomorrow; the batch numbers don't match, and the test reports seem templated. Yet you still don't dare to refuse them—components like screws and bearings, if the dimensions are even slightly off, will render the assembled product useless.
What’s even worse is that some people modify PA66 or mix in PA6 and sell it as PA610. To outsiders, the pellets look similar, but once you put them in a machine and absorb water, the dimensions all go off. There’s a saying among industrial parts factory owners: buying PA610, you’re not afraid of it being expensive, you’re afraid of paying for PA610 and ending up with a bunch of PA6 material.
This article straightens out the material PA610: how it differs from PA6 and PA66, who holds the global market, and how to choose sub-brands without making mistakes.
02 What is PA610, and how can its size remain stable?
PA610, with the chemical name polyamide 610, is synthesized by the polycondensation of hexamethylenediamine and sebacic acid. Sebacic acid is gradually extracted from castor oil, so more than sixty percent of PA610's raw materials come from renewable resources, which is uncommon in nylon.
The key difference between it and PA6 and PA66 lies in water absorption. The long carbon chains make its amide group density lower, resulting in a much lower water absorption rate than PA6. After absorbing moisture, it shows minimal dimensional changes, maintains good rigidity, and is also oil-resistant, chemically resistant, and tough enough. It is used for industrial brush bristles, fishing lines, ski boots, precision bearings, gears, and oil and gas pipelines.
This market is not large, but the entry barriers are high. According to Dataintelo, PA610 is a highly concentrated niche market, with the top three foreign companies being: Germany's BASF, Switzerland's EMS-GRIVORY, and the U.S.'s DuPont Zytel series (its high-performance nylon business is now under Celanese). DOMO's DOMAMID long-chain nylon is also in the same tier.
03 The secondary plate is not adulterated; the water-absorbing line is fluctuating.
First, let's explain the definition thoroughly. 'Sub-standard products' are the portion from the same manufacturer and the same brand that did not fully meet the standards of the main product during factory inspection. There are four sources: leftover material from the start and end of production runs, transitional material during brand switching, batches where individual indicators slightly exceed the standards due to process fluctuations, and leftover material from secondary production lines.
PA610 secondary brand, the variations are mostly in melting point, viscosity, and moisture content. Here is a key pain point to remember:
The genuine PA610 is so expensive that I'm reluctant to use it for screw bearings. Recycled PA610 absorbs water and its dimensions drift, and once on the machine, all the tolerances go off.
The distinction between regrind, recycled material, and others must be clearly understood. Regrind is made by granulating processing scraps; it has undergone one thermal history, and its molecular weight has already decreased. Recycled material is granulated from waste nylon, and its water absorption and dimensional stability are unpredictable. As for a secondary brand of original PA610, it is still made from virgin polymer pellets, and the long carbon chain's low water absorption foundation remains intact. Using regrind in industrial parts means gambling with dimensional tolerances.
04 BASF: Ultramid, a veteran player in long-chain polymers
Germany's BASF has a nylon brand called Ultramid, with a product line covering long-chain nylons such as PA6, PA66, and PA610. According to Dataintelo, BASF holds a leading position in the PA610 market due to its integrated supply chain and multi-site production capacity.
Its secondary grade characteristics are: slight fluctuations in viscosity or melt index, but the base material's low water absorption and oil resistance remain unchanged. For making industrial structural parts, oil and gas pipelines, and general mechanical components, if you choose the right secondary grade, dimensional stability is reliable.
05 EMS-GRIVORY: Take the castor oil route to the end
Swiss EMS-GRIVORY, PA610 grade is called Grilamid 2S. According to its official website, Grilamid 2S is polymerized from hexamethylene diamine and sebacic acid, with the sebacic acid derived from castor oil. About 60% of the polymer comes from renewable raw materials, and the GreenLine series is its main product.
Its secondary grade, commonly, has viscosity or moisture content fluctuating at the factory's tolerance limit. For making precision parts that require high dimensional stability, bristles, and bearing cages, select carefully from the secondary grade; the low water absorption criterion is non-negotiable.
06 DuPont Zytel: The Technical Origin of Long-Chain Nylon
The Zytel series from DuPont in the United States is a long-established brand in the nylon industry; according to channel information from Biesterfeld and others, its long carbon chain grades such as PA610 and PA610/1010 are now operated by Celanese, but the Zytel brand name remains. DuPont's technological accumulation in long carbon chain nylons is widely recognized in the industry.
Its sub-brands often have slightly different melting points or reinforcement ratios compared to the main brand. When making fiberglass-reinforced structural parts or oil- and chemical-resistant components, selecting the right sub-grade ensures both strength and dimensions are within specifications.
07 Buying a PA610 side card, first figure out whether you are buying a 610 or a 6
PA610 sub-brand acceptance, focus on three things.
First, check the brand and source of the material, measure the density and moisture content, and look at the DSC melting point. Don’t let PA6 or PA66 sneak in disguised. Then check the viscosity and melt flow index. Long-chain nylons are sensitive to viscosity, and any fluctuation can affect both spinning and injection molding. Finally, check the original factory packaging. Both large and small packages are fine, but the batch number and certificate of quality must match.
Common pitfalls are: mixing PA6 with PA66 and selling it as PA610, resulting in dimensional deviations after water absorption; or directly using secondary brands with high moisture content on the machine, causing products to foam and surface blister. Industrial parts compete based on dimensional stability, and moisture absorption is something you can't save on, whether in drying the material or in material selection.
Cologne Warehouse Spot｜PA610 Peak Season
Main promoted brands: BASF, EMS-GRIVORY, DuPont Zytel
Main grades: Ultramid series, Grilamid 2S GreenLine, Zytel 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 Guarantee: Direct procurement from the original factory with original packaging
08 Eight-line mnemonic, plus a case from Nanchang
Here's a selection mnemonic that you can follow directly:
Want low water absorption and stable dimensions—look at PA610 first, don't rush to use PA6;
High requirements for industrial parts — choose BASF, EMS-GRIVORY, DuPont Zytel;
Material source — measure density and melting point, don't let PA6/PA66 mix in;
Viscosity melt index—both drawing and injection molding depend on it;
Moisture content — Dry the material before feeding into the machine, no bubbling on the surface;
Recycled material from scraps — don’t buy it as a secondary brand, the molecular weight has already decreased;
Large packaging and small packaging — only original factory packaging with traceable batch numbers can be signed;
Mass production — first test the size with a small sample, keep a sample, then increase the quantity.
There is a customer in Nanchang who manufactures industrial brush bristles and bearings. Previously, they bought an unknown source of 'PA610' to save money. After drawing, as soon as it encountered moisture, the bristle diameter tolerance deviated significantly. After installation, both noise and wear exceeded the standards, and the rework rate for a batch of goods reached 15%.
Later, we switched to the selected subsidiary brand of PA610 from a major imported manufacturer. The measured moisture content and viscosity deviated very little from the main brand. After moisture absorption, the dimensional change rate was kept within specifications. The tolerances for bristles and bearings were stabilized in one go, bringing the rework rate down to below 0.5%, and the cost per ton of material was also significantly reduced.
