苯乙烯系这个圈子，是有条心照不宣的鄙视链的。做PMMA亚克力的，觉得自己做的是光学料，看不起做MS的；做MS的，又觉得自己比做SAN的高级半档。毕竟SAN又硬又脆，透明不如亚克力，韧性比ABS差一截，怎么看都是苯乙烯系里那个“不上不下”的。
但有意思的是，每年车间里因为透明件发黄、开裂、被退货，翻车翻得格外凶的，恰恰就是被大家瞧不上的SAN。
说白了，不是SAN不行，是多数人把它当成了“便宜的透明PS”在用。这材料耐化学品、表面硬、尺寸稳，做化妆品盒、笔杆、打火机外壳是一把好手；可你拿它当耐冲击料、当低温件来做，那它翻脸比翻书还快。
今天不绕弯子，就把SAN这一家族里，真正值得用副牌的三家国外大厂扒清楚。看完你再决定，下次那柜便宜的SAN，要不要先看看它到底是哪家出来的。
SAN是什么，全球这盘到底谁说了算
SAN，学名苯乙烯-丙烯腈共聚物，行内也叫AS。苯乙烯给它透明和光泽，丙烯腈给它刚性、硬度和耐化学品。透明、硬、亮、耐油耐溶剂，这就是SAN的四件套。它和ABS的区别也一句话说清：ABS是SAN里掺了丁二烯橡胶来增韧，SAN本身没有那个“橡胶韧筋”，所以更硬更亮，但更脆。
全球SAN这盘生意，真正能打的国外大厂就那么几家。按产能和市场份额口径，综合行业研报与企业公开资料（2025—2026年）：
1. 英力士苯领 INEOS Styrolution（德国）：全球苯乙烯类树脂规模领先者，SAN品牌 Luran®，份额约18%上下；
2. LG化学（韩国）：ABS/SAN一体化大厂，ABS与SAN合计产能约235万吨/年，SAN份额约14%；
3. 奇美实业（中国台湾）：KIBISAN® SAN，份额口径在10%—22%之间浮动，综合看稳居头部梯队。
这三家加起来，把全球SAN大半江山攥在手里。剩下乐天、台化、锦湖这些，多在通用级里分一杯羹，做副牌选料，盯着这三家基本不会跑偏。
副牌不是次品，更不是回料
讲副牌之前，先把这事儿说透。
副牌，和正牌出自同一套聚合装置、同一批聚合产物：出厂检验全指标达标的，贴正牌标；个别指标——比如熔指、色相、透光、灰分——小幅没踩线的那部分，就是副牌。它的分子结构和正牌一模一样，是原厂原生粒子，不是废旧料回炉再造。
SAN副牌从哪来？四个口子：装置开停车的头尾料、切换牌号的过渡料、工艺波动导致单项指标小幅超标的批次、副线尾料。它身上常见的“小毛病”，无非就是色相略微偏黄、熔指略高或略低、透光雾度差一点点。
关键要把四类料分清楚：正牌全指标稳、批次一致；副牌基材同正牌、个别指标小幅浮动；回料/水口料是加工边角料再造粒，已经吃过一次热历史；再生料是废塑料回收造粒，性能波动大。做透明件、做化妆品盒的，把副牌和再生料搞混上机，黄的黄、雾的雾，一批就废。
至于包装，你只要认准大包装、小包装两种说法就行，别被流通商报出来的具体公斤数绕进去。
英力士苯领Luran®：均衡派的老牌劲旅
先看Luran®。德国英力士苯领，全球苯乙烯类树脂的老牌劲旅，生产基地遍布欧亚美。它家的SAN叫Luran®，走的是均衡高端路线。代表牌号像 Luran® 358N、368R、338L，透明、易流动、尺寸稳；耐热版本 Luran® High Heat（HH-120）偏耐热、耐化学。
Luran®的副牌，多为色相或熔指小幅偏离的批次。它的好处是配方成熟、批次稳，副牌拿来做普通透明内件、配色件、一般结构件，性能底子够用。但做食品接触、做高光泽外观件的，就别硬上副牌了，那不是它该干的活。
LG化学：量大货稳的通用派
再看LG化学。韩国头部化工企业之一，ABS和SAN在一个体系里打，ABS/SAN合计产能约235万吨/年，规模摆在那儿。LG的SAN走通用级到食品级、耐候级全覆盖，供应欧洲、北美和亚洲市场。
LG副牌的特点是量大、货源稳、牌号贴近通用注塑。适合对透明度要求中等、不做苛刻外观面的批量件。它的好处是常年有货，不会因为装置检修说断就断，中小改性厂、制品厂拿它当过渡料、当量产料都很顺手。
奇美KIBISAN®：流通量靠前，也是仿冒重灾区
再来看奇美。中国台湾的奇美实业，KIBISAN®就是它家的SAN牌子，PN-108L、PN-138H、D-168这些牌号在国内流通得极广，做化妆品盒、火机外壳、食品容器的都熟。奇美走连续式制程，透明、光泽、耐化学的口碑一直在线。
奇美副牌是国内市场流通量很大的SAN副牌来源之一。它的问题也在这儿——正因为量大，仿冒、混货也跟着多。你买到一袋“奇美副牌”，先别急着上机，验熔指、对色相、看原厂包装，三步一个都不能少。
SAN副牌怎么挑，避这三个坑
SAN副牌怎么挑？几条实打实的。一看厂，二看号，三测指标。厂，就是前面这三家的正出副，别买说不清来源的“杂牌副牌”；号，就是牌号要对得上你的产品，别拿高熔指副牌去做需要强度的件；指标，熔指、透光雾度、色相黄度，进厂先测，留样可溯。
常见的坑有三个：一是把再生料当副牌，便宜是真便宜，黄变也是真快；二是牌号对不上，流动太猛，薄壁件充模是爽了，大件却翘给你看；三是批次混用，今天这袋、明天那袋，良率忽高忽低，调机师傅天天头大。
记住一条：做透明外观件的，副牌只敢用在非外观面、内件或配色件上；做本色透明盒、食品容器的，老老实实走正牌，省那点料钱不值当。
科隆仓库现货｜SAN随货
主推品牌：英力士苯领、LG化学、奇美
主要牌号：Luran、LG SAN、KIBISAN
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
七条口诀，把SAN副牌用在刀刃上
给你一个能直接上手的选型口诀：
1. 透明外观件、食品级——正牌别省；
2. 内件、配色件、一般结构件——副牌可用；
3. 认厂：Luran、LG、KIBISAN，原厂出货再谈价；
4. 验三项：熔指、雾度、黄度，进厂先测；
5. 留样可溯，批次别混用；
6. 怕黄变、怕溶剂——别碰副牌；
7. 冬天脆裂高发——SAN本就偏脆，低温件换ABS或PC/ABS。
温州有家做透明办公文具的厂，笔杆、文件座、透明笔筒样样都做。之前图便宜进了一柜来路不明的“透明副牌”，结果夏天一放，黄的黄、雾的雾，外观件退货率一度冲到11%。后来我们给它配了奇美KIBISAN的精选副牌，只用于非外观面和内件，透明外观件仍走正牌，外观不良率从11%压到0.4%。一吨料的差价一年算下来，够覆盖两次车间技改。
Within the styrene-based circle, there is an unspoken hierarchy of disdain. Those who work with PMMA acrylic think they are dealing with optical materials and look down on those working with MS; those in MS consider themselves a step above SAN. After all, SAN is both hard and brittle, less transparent than acrylic, and not as tough as ABS, making it, in every way, the 'in-between' material in the styrene family.
But interestingly, every year, the material that suffers the most in the workshop due to yellowing, cracking, and being returned—getting trashed the hardest—is precisely SAN, the one everyone looks down on.
To put it bluntly, it’s not that SAN is incapable; it’s that most people treat it as a “cheap transparent PS.” This material is resistant to chemicals, has a hard surface, and maintains stable dimensions, making it great for cosmetic boxes, pen barrels, and lighter cases. But if you use it as an impact-resistant material or for low-temperature parts, it will turn against you faster than flipping a page.
Today, let's not beat around the bush and directly break down the three foreign big manufacturers in the SAN family that are truly worth using as a secondary brand. After reading this, you can decide whether next time, when you see a cheap SAN product, you should first check which company it actually comes from.
What is SAN, and who really calls the shots globally?
SAN, scientifically known as styrene-acrylonitrile copolymer, is also called AS in the industry. Styrene gives it transparency and gloss, while acrylonitrile provides rigidity, hardness, and chemical resistance. Transparent, hard, shiny, and resistant to oil and solvents—these are the four characteristics of SAN. The difference between it and ABS can also be summed up in one sentence: ABS is SAN with added butadiene rubber for toughening, whereas SAN itself does not have that 'rubbery reinforcement,' making it harder and shinier, but more brittle.
In the global SAN business, there are only a few truly competitive foreign companies. Based on production capacity and market share metrics, and by synthesizing industry research reports and publicly available company information (2025–2026):
1. INEOS Styrolution (Germany): A global leader in styrene-based resins, SAN brand Luran®, with a market share of around 18%;
2. LG Chem (South Korea): An integrated large manufacturer of ABS/SAN, with a total ABS and SAN production capacity of about 2.35 million tons per year, and SAN accounting for about 14%.
3. Chimei Industrial (Taiwan, China): KIBISAN® SAN, with a market share fluctuating between 10% and 22%, overall remains solidly in the leading tier.
Together, these three companies hold more than half of the global SAN market. The remaining ones like Lotte, Taihua, and Kumho mostly share a piece of the commodity-grade segment, producing secondary brand materials, and focusing on these three companies, they basically won't deviate.
Secondary cards are not defective products, let alone recycled materials.
Before talking about the副牌, let's make this matter clear first.
Sub-brand, and the main brand come from the same set of polymerization devices and the same batch of polymerization products: those that meet all the factory inspection indicators are labeled with the main brand; for those with slight deviations in individual indicators—such as melt index, color, transparency, ash content—that part is the sub-brand. Its molecular structure is exactly the same as the main brand, it is the original factory’s raw pellets, not recycled material remade.
Where does SAN by-product come from? Four sources: start and end materials from machine startup and shutdown, transition materials caused by switching grades, batches with slight exceedances in individual indicators due to process fluctuations, and leftover materials from secondary lines. The common 'minor issues' it exhibits are nothing more than slightly yellowish color, melt index slightly high or low, and slightly poorer light transmittance haze.
The key is to distinguish the four types of materials: Official brand meets all specifications and is stable, with consistent batches; Secondary brand has the same base material as the official brand, with slight fluctuations in individual specifications; Regrind/sprue material is from processing scraps and re-pelletized, having been through a heat history once; Recycled material is made from waste plastic and re-pelletized, with large performance variations. When making transparent parts or cosmetic boxes, if you mix secondary brand and recycled material, yellow stays yellow, cloudy stays cloudy, and the whole batch will be wasted.
As for packaging, you just need to know the terms 'large package' and 'small package,' and don't get confused by the specific weight in kilograms reported by distributors.
INEOS Phenol Luran®: A veteran powerhouse favored by the balanced camp
First, let's look at Luran®. A leading brand of styrene-based resins from INEOS Styrolution Germany, it is a veteran in the global styrenic resin market with production bases across Europe, Asia, and America. Their SAN is called Luran®, following a balanced high-end route. Representative grades include Luran® 358N, 368R, and 338L, which are transparent, easy-flowing, and dimensionally stable; the heat-resistant version, Luran® High Heat (HH-120), is more heat- and chemical-resistant.
Luran®'s secondary grade, mostly batches with slight deviations in color or melt index. Its advantage is a mature formula and stable batches. The secondary grade can be used for ordinary transparent interior parts, colored parts, and general structural components, as its performance is sufficient. But for food contact applications or high-gloss exterior parts, don't force the use of the secondary grade; that's not what it's meant for.
LG Chem: A Generalist Focusing on Large Volumes and Stable Goods
Now let's look at LG Chem. One of South Korea's leading chemical companies, it produces ABS and SAN in one system, with a total ABS/SAN capacity of about 2.35 million tons per year, the scale is obvious. LG's SAN covers everything from general grade to food grade and weather-resistant grade, supplying the European, North American, and Asian markets.
The characteristics of LG's sub-brand are large volume, stable supply, and grades close to general-purpose injection molding. It is suitable for mass-produced parts that require medium transparency and do not demand stringent surface appearance. Its advantage is that it is available year-round, and supply won't be interrupted due to equipment maintenance. Small and medium-sized compounding factories and product manufacturers find it very convenient to use as transitional material or for mass production.
Chimei KIBISAN®: High circulation, also a major area for counterfeiting
Next, let's look at Chi Mei. Chi Mei Industrial from Taiwan, China, KIBISAN® is its SAN brand. Grades like PN-108L, PN-138H, and D-168 are widely circulated domestically, and those making cosmetic cases, lighter shells, and food containers are all familiar with them. Chi Mei uses continuous processing, and its reputation for transparency, gloss, and chemical resistance has always been solid.
Chimei's sub-brand is one of the sources of SAN sub-brands with a large circulation in the domestic market. Its problem lies here too — precisely because the volume is large, counterfeiting and mixed goods are also common. If you buy a bag of 'Chimei sub-brand,' don't rush to use it on your machine; check the melt index, compare the color, and inspect the original packaging — none of these three steps can be skipped.
How to choose SAN sub-brands, avoid these three pitfalls
How to choose SAN sub-brands? A few solid tips. First, check the manufacturer; second, check the grade number; third, test the specifications. Manufacturer means choosing official sub-brands from the three companies mentioned earlier, and avoid buying 'miscellaneous sub-brands' of unclear origin. Grade number means it should match your product; don't use sub-brands with high flow index for parts that require strength. Specifications include flow index, light transmittance haze, and color hue/yellowness – test these when the material arrives at the factory and keep samples for traceability.
There are three common pitfalls: First, treating recycled material as a secondary option—it’s really cheap, but it also yellows really quickly; second, mismatched grades—flow is too strong, so filling thin-walled parts is easy, but large parts warp before your eyes; third, mixing batches—using one bag today and another bag tomorrow, causing yield to fluctuate, which gives the machine operators headaches every day.
Remember one thing: for making transparent exterior parts, sub-brands only dare to use on non-visible surfaces, internal parts, or colored components; for making natural-color transparent boxes or food containers, honestly go with the main brand, saving that little material cost is not worth it.
Cologne warehouse in stock | SAN shipped with goods
Main promoted brands: Ineos Phenyl leader, LG Chem, Chi Mei
Main grades: Luran, LG SAN, KIBISAN
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 Original Factory Packaging
Seven rules, use SAN secondary cards on the edge of the blade
Here's a selection mnemonic that you can use right away:
1. Transparent exterior parts, food-grade — genuine brand, don't skimp;
2. Internal parts, color-matched parts, general structural parts — secondary brand can be used;
3. Factory recognition: Luran, LG, KIBISAN, discuss the price after shipment from the original factory;
4. Check three items: melt flow, haze, and yellowness; test them before entering the factory;
5. Samples must be traceable; do not mix batches;
6. To avoid yellowing and solvent issues — do not touch substandard brands;
7. Brittle cracking is common in winter — SAN is naturally brittle, for low-temperature parts use ABS or PC/ABS instead.
There is a factory in Wenzhou that makes transparent office supplies, including pen barrels, file holders, and transparent pen cups. Previously, in an attempt to save costs, they imported a container of unknown 'transparent substandard brand' materials, which in summer turned yellow or hazy, causing the return rate of appearance parts to spike to 11%. Later, we supplied them with selected substandard material from Chi Mei KIBISAN, only for non-appearance surfaces and internal parts, while transparent appearance parts still used the standard brand. The defect rate of appearance parts dropped from 11% to 0.4%. The price difference for one ton of material in a year was enough to cover two workshop technical upgrades.
