化妆品包材用的透明共聚酯，全球一年就二十多万吨，PCTA只占其中不到一成。
但它做的膏霜罐、口红管，单价是普通PET的两三倍——因为它透明、耐化学、装膏体不串味。去年一个做化妆品包装的客户，为了省料钱换了便宜透明料，一批膏霜罐装进去俩月就串味、雾化，整批退货。
说白了，PCTA这东西，量小但金贵，用错位置就是砸化妆品客户的牌子。今天把它讲透。
一、PCTA是什么，国外大厂排在哪
PCTA是环己烷二甲醇（CHDM）改性的共聚酯，用对苯二甲酸、己二酸加多元醇共聚。它和PETG、PCTG是一家人：PETG用乙二醇加CHDM，PCTG主要用CHDM，PCTA则引入己二酸，柔韧性和耐化学更好，做化妆品容器特别合适。
全球PCTA这个小盘子，国外第一梯队很集中。伊士曼（Eastman）是龙头，Eastar PCTA系列，按不同口径它在非晶共聚酯里占两到四成份额，Tritan和Eastar两条线；韩国SK化学排第二，ECOTRAN和SKYGREEN系列；日本Unitika的A-ESTER是第三家做PCTA的。
说白了，PCTA国外就伊士曼、SK化学、Unitika这几家把着。买副牌，主要买Eastar和ECOTRAN体系里指标小幅浮动的原厂料。
二、PCTA副牌到底是什么来路
▍PCTA副牌对上化妆品包装容器的配方，透明不雾、装香膏不串味，脱模一次比一次利落。
先把定义说死：副牌，是同一厂家、同一牌号的产品里，出厂检验没完全达到正牌技术指标的那一部分。同一批共聚产物，检验全过贴正牌标签，个别指标差一点，就是副牌。
PCTA副牌的四大来源：装置开停车时的头尾料、牌号切换时的过渡料、透光率或雾度小幅超标的批次、副线尾料。
关键在于——它仍然是原厂原生共聚酯粒子，分子结构和正牌一致，只是透光率、雾度、色相这些指标小幅浮动。不是废旧料再造粒。
边界划清楚：
| 类型 | 来源 | 品质 | 典型用途 |
|---|
| 正牌 | 原厂达标批次 | 透光、雾度、析出全达标 | 高端膏霜罐、认证化妆品件 |
| 副牌 | 原厂未达标批次 | 个别指标小幅偏离，基材一致 | 化妆品内托、展示件、一般容器 |
| 回料/水口料 | 加工边角料再造粒 | 已吃过一次热历史 | 低要求制品 |
| 再生料 | 废旧塑料回收造粒 | 析出乱，易串味雾化 | 低端填充 |
PCTA做化妆品容器，直接接触皮肤和膏体，副牌也要看析出，不是便宜就上。
三、伊士曼：Eastar和Tritan两条线
头一家，伊士曼（Eastman），美国。Eastar 5000系列就是PCTA，做化妆品包装、工具手柄；Tritan是它无BPA的透明共聚酯招牌。
伊士曼的副牌主要浮动在透光率、雾度和色相上。透明膏霜罐要高透，副牌雾度高一点做内托、展示件刚好，做高光外瓶就差口气。
伊士曼副牌大包装小包装都有，原厂原包出来，批号可追。做化妆品内托、一般透明容器的厂，拿精选副牌替代正牌，成本下来一截，析出又不跑偏。
四、SK化学：ECOTRAN和SKYGREEN
第二家，韩国SK化学。
ECOTRAN PCTA和SKYGREEN系列，占两成上下份额。SK的PCTA走性价比路线，在亚太市场做3D打印丝、汽车件、消费电子。它的副牌析出低，做化妆品内托和展示件合适。
SK体系副牌流通量比伊士曼小，碰到了要认准是SK原厂，查批号、查产地。
五、Unitika：A-ESTER的日系精细
第三家，日本Unitika。
A-ESTER是它的PCTA牌号，做光学膜、泡罩包装、注塑件，走日系精细路线，量不大。
说白了，PCTA国外就伊士曼、SK、Unitika这三家把着。买之前先认体系，别拿PETG冒充PCTA糊弄过去——这俩外观都透明，耐化学差着一大截。
六、买PCTA副牌，四个坑先标出来
讲完格局，说几个真会踩的坑。
第一，别拿PETG冒充PCTA。两者都透明，但PCTA耐化学和柔韧更好，装膏体不串味；PETG装油基膏体容易应力开裂，一压就白。
第二，看透光率和雾度。膏霜罐要高透，副牌雾度高的做内托，别硬上高光外瓶。
第三，看析出和食品接触。化妆品直接接触皮肤，副牌析出要达标，别拿工业级凑化妆品级。
第四，脱模和壁厚。化妆品薄壁件多，副牌熔指要对上模具，不然充不满、脱模粘模。
科隆仓库现货｜PCTA整车
主推品牌：伊士曼、SK化学、Unitika。
主要牌号：Eastar（5000系列）/Tritan、ECOTRAN/SKYGREEN、A-ESTER。
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：PCTA仓库现货通常在5000吨左右，其中小包副牌备货800-1000吨、箱装副牌备货300-500吨、大包料/吨包料备货3500-3900吨。
供应保障：先测后签，小样过了再走大货。
七、选型口诀和一个茂名的案子
给你几句选型口诀：
一看区分——PCTA和PETG别混，装膏体用PCTA；
二看透光雾度——高透走正牌，内托用副牌；
三看析出——化妆品接触皮肤，析出要达标；
四看熔指——薄壁膏霜罐，熔指对上模具。
说个真事。茂名有家做化妆品包装容器的客户，之前图便宜拿了批透明PETG冒充PCTA做膏霜罐，装膏体俩月就串味雾化，退货率18%。后来换成伊士曼Eastar体系的原厂PCTA副牌，透光率和析出对上后，膏霜罐半年不串味不雾化，一次合格率从七成二拉到九成七。
Transparent copolyester used for cosmetic packaging amounts to just over 200,000 tons globally each year, of which PCTA accounts for less than one-tenth.
But the cream jars and lipstick tubes it makes are two to three times the price of ordinary PET — because they are transparent, chemically resistant, and prevent flavors from mixing in the cream. Last year, a cosmetic packaging client switched to cheaper transparent material to save on costs, and after two months, a batch of cream jars developed off-flavors and clouding, resulting in the whole batch being returned.
To put it bluntly, PCTA is something small but precious, and using it in the wrong place can ruin the reputation with cosmetic clients. Today, let's explain it thoroughly.
1. What is PCTA, and where do foreign big companies rank
PCTA is a copolyester modified with cyclohexanedimethanol (CHDM), copolymerized with terephthalic acid, adipic acid, and polyols. It is in the same family as PETG and PCTG: PETG uses ethylene glycol plus CHDM, PCTG mainly uses CHDM, while PCTA introduces adipic acid, offering better flexibility and chemical resistance, making it especially suitable for cosmetic containers.
The global PCTA market is a small segment, with the top tier overseas being very concentrated. Eastman is the leader; its Eastar PCTA series accounts for 20% to 40% of the amorphous copolyester market depending on the specifications, with the Tritan and Eastar lines. South Korea's SK Chemicals ranks second with the ECOTRAN and SKYGREEN series. Japan's Unitika's A-ESTER is the third company producing PCTA.
To put it plainly, abroad, PCTA is basically controlled by Eastman, SK Chemicals, and Unitika. When buying secondary brands, the main choice is Eastar and original materials in the ECOTRAN system with slightly fluctuating indicators.
2. What exactly is the origin of the PCTA sub-brand?
▍PCTA sub-brand matches the formulation of cosmetic packaging containers, keeping them clear without fogging, preventing fragrance creams from mixing odors, and making demolding smoother with each time.
Let's first settle the definition: a secondary brand refers to the portion of products from the same manufacturer and the same brand number that did not fully meet the technical specifications of the main brand during factory inspection. For the same batch of copolymers, if all tests pass and the main brand label is applied, but some individual specifications are slightly off, they are considered the secondary brand.
The four main sources of PCTA sub-brands: head and tail materials when the equipment starts and stops, transitional materials during grade switching, batches with slightly excessive light transmittance or haze, and tail materials from secondary production lines.
The key point is — it is still original factory native copolyester particles, with molecular structure identical to the genuine brand, only slight fluctuations in indicators like light transmittance, haze, and hue. It is not reprocessed from waste materials.
Clearly define the boundaries:
| Type | Source | Quality | Typical uses |
|---|
| genuine brand | Original factory standard batch | Transmittance, haze, and precipitation all meet the standards | High-end cream jars, certified cosmetic items |
| Side deck | Original factory substandard batch | Individual indicators slightly deviate, substrate is consistent | Inner packaging of cosmetics, display items, general containers |
| Recycled material / Sprue material | Processing scrap material into pellets | Have eaten hot history once | Low-demand products |
| Recycled material | Recycled Plastic Pelletizing | Precipitation is chaotic, easy to mix flavors when atomized | low-end filler |
PCTA makes cosmetic containers that come into direct contact with the skin and creams. Even secondary brands need to check for leaching; you shouldn't just go for the cheapest option.
3. Eastman: Eastar and Tritan lines
The first one, Eastman, United States. The Eastar 5000 series is PCTA, used for cosmetic packaging and tool handles; Tritan is its signature transparent copolyester without BPA.
Eastman's secondary brand mainly varies in light transmittance, haze, and hue. Transparent cream jars need to be highly transparent; the secondary brand with higher haze works well for inner packaging and display pieces, but is lacking for highlighting outer bottles.
Eastman sub-brand comes in both large and small packages, released with the original factory packaging, and the batch number can be tracked. For manufacturers making cosmetic inserts or general transparent containers, using carefully selected sub-brand as a substitute for the main brand significantly cuts costs, and the precipitation remains consistent.
4. SK Chemicals: ECOTRAN and SKYGREEN
The second one is SK Chemicals from South Korea.
ECOTRAN PCTA and the SKYGREEN series account for about 20% of the market share. SK's PCTA follows a cost-performance strategy, producing 3D printing filaments, automotive parts, and consumer electronics in the Asia-Pacific market. Its by-product yield is low, making it suitable for cosmetic inner trays and display parts.
The circulation volume of SK system sub-cards is smaller than that of Eastman, so when you encounter them, you need to make sure they are genuine SK products and check the batch number and place of origin.
5. Unitika: A-ESTER's Japanese Fine
The third one, Japan's Unitika.
A-ESTER is its PCTA grade, used for optical films, blister packaging, and injection-molded parts, following the Japanese-style fine route, with small quantities.
To be frank, abroad, it's just Eastman, SK, and Unitika that dominate PCTA. Before buying, first recognize the system—don't pass off PETG as PCTA to fool anyone—these two both look transparent, but their chemical resistance differs a lot.
6. When buying a PCTA secondary card, mark the four slots first
After talking about the big picture, let's go over a few pitfalls that people really fall into.
First, don't pass off PETG as PCTA. Both are transparent, but PCTA is more chemically resistant and flexible, and it doesn't transfer flavors when holding pastes; PETG tends to stress-crack when holding oil-based pastes and turns white when pressed.
Second, look at the light transmittance and haze. Cream jars should be highly transparent, while sub-brand jars with high haze should be used as inner containers; don't forcefully use high-gloss outer bottles.
Third, look at leaching and food contact. Cosmetics come into direct contact with the skin, so the leaching of by-products must meet standards; don't use industrial-grade substances to pass off as cosmetic-grade.
Fourth, demolding and wall thickness. Cosmetic thin-walled parts are common, and the secondary gate must align with the mold; otherwise, it won't fill completely or may stick during demolding.
Cologne Warehouse Spot | PCTA Complete Vehicle
Main promoted brands: Eastman, SK Chemicals, Unitika.
Main grades: Eastar (5000 series) / Tritan, ECOTRAN / SKYGREEN, A-ESTER.
Packaging specifications: Small-pack secondary brands and boxed secondary brands use small packaging, large-pack materials/ton bags use ton bags, and are packaged and stocked according to workshop usage.
Warehouse spot inventory: PCTA warehouse spot inventory is usually around 5,000 tons, including 800-1,000 tons of small bag secondary brand stock, 300-500 tons of boxed secondary brand stock, and 3,500-3,900 tons of large bag/ton bag material stock.
Supply guarantee: test first, sign later; proceed with bulk goods only after the sample passes.
7. Selection Mnemonics and a Case from Maoming
Here are a few selection mnemonics for you:
A quick distinction—don’t mix up PCTA and PETG; use PCTA for filling paste.
Second, check the light transmittance haze — use the main brand for high transparency, and use the secondary brand for the liner;
Three inspections for precipitation — When cosmetics come into contact with the skin, the precipitation must meet standards;
Four check molten fingers — thin-walled ointment and cream jars, align the molten fingers with the mold.
Let's talk about a true story. There is a client in Maoming that manufactures cosmetic packaging containers. Previously, to save money, they bought a batch of transparent PETG and pretended it was PCTA for making cream jars. After filling with cream, within two months there was flavor transfer and misting, with a return rate of 18%. Later, they switched to Eastar system's original PCTA sub-brand from Eastman. Once the light transmittance and extraction levels matched, the cream jars did not have flavor transfer or misting for half a year, and the first-pass yield increased from 72% to 97%.
