宁波一家做化妆品透明瓶的厂，去年从中间商手里拿了一批“PETG副牌”，注吹出来瓶子发雾、印刷层一擦就掉，最后送去检测，发现里面掺了近三成回收料。老板把货退了，才想明白一件事：PETG这种透明料，副牌靠不靠谱，先得看穿它的源头是哪家、CHDM单体是谁供的。国产PETG这条线，真正把单体和聚合捏到一起的，万华化学绕不开。
PETG是什么，国产格局
PETG是乙二醇改性的透明共聚酯，由PTA、EG和CHDM三种单体共聚而成，完全无定形、高透光、易着色、热封性好，化妆品瓶、食品容器、透明片材、3D打印线材、热收缩标签里大量用它。它的命门在CHDM——环己烷二甲醇这个关键共聚单体过去长期靠进口，单体被卡住，树脂就只能跟着进口价走。全球PETG原本由美国伊士曼、韩国SK化学等把持。国内这两年国产替代加速：万华化学在烟台自建CHDM工业化装置并配套PETG切片线，原年产6万吨PBAT柔性装置经技改可切换生产PETG，从单体到聚合一体化；万凯新材已投产数万吨级PETG，浙江万马高分子也实现量产。论CHDM自供和共聚一体化程度，万华化学是国内这条线上绕不开的一家。下游看，化妆品和日化包装占消费大头，食品容器、透明片材和3D打印是增量方向。
PETG副牌从哪来，和回收片怎么分
PETG副牌来自聚合装置开停车的头尾料、牌号切换的过渡料、工艺波动致透光率或色相小幅偏离的批次。它仍是原厂原生PETG粒子，无定形透明骨架与正牌一致，个别指标小幅浮动，不是回料再造粒。要把PETG副牌和回收片分清：回收片（透明瓶、片材边角压碎）已经历一次热历史，易发黄、带黑点和印刷残留，透光率和力学都不稳；原厂副牌是一次聚合产物。别拿回收透明片当PETG副牌，往化妆品瓶或食品接触件上凑。PETG副牌按透光率和熔融指数分档，透光率和雾度偏差直接影响瓶子外观，注吹前必须测透光和雾度。
头部企业深度分述：万华化学
万华化学总部在烟台，原本是聚氨酯巨头，这几年把新材料版图往高透明共聚酯上伸。它做PETG的底气在CHDM——自建CHDM工业化装置，把过去最卡脖子的共聚单体握在手里，再配套PETG切片聚合线，形成单体到树脂的一体化。其PETG产品面向化妆品包装、食品容器、透明片材和3D打印，主打高透光、易印刷、热封稳定。它的副牌多来自柔性装置牌号切换和开停车，透光率略飘、色相略深，但无定形透明骨架和加工窗口与正牌同体系。对一般化妆品瓶、非食品接触透明件、透明片材，副牌替代进口PETG的性价比明显。第二梯队里，万凯新材在瓶片和PETG方向放量，浙江万马高分子已量产PETG，道恩合复在共聚酯方向配套CHDM项目，这些多为树脂聚合或改性线，CHDM一体化深度不及万华，仅作行业背景。从价格看，CHDM自供让万华PETG在面对伊士曼、SK报价时多了一层成本缓冲，下游注吹厂对国产透明共聚酯的接受度这两年明显提高。
PETG副牌选购避坑
第一，认CHDM一体化来源。PETG单价不低，换包掺回收料风险大，要原厂原包带批号。第二，测透光率和雾度，透明瓶对外观敏感，每批核对透光、雾度和色相。第三，食品接触件必须正牌或有对应合规牌号，副牌用于一般包装和非食品件。第四，干燥，PETG吸潮，注塑注吹前充分干燥，含水粒子会银纹发雾。第五，批次留样可溯，每批留样，出料发雾或印刷脱落可回追。另外要警惕拿PMMA掺混料冒充PETG副牌——PMMA脆、热封性差，注吹瓶子容易开裂，用热封和跌落测试一测便知。
科隆仓库现货
科隆仓库现货主推品牌：万华化学PETG透明共聚酯副牌料。主要牌号：化妆品瓶、食品容器、透明片材、3D打印用无定形透明级专用料。包装规格：小包装与大包装（吨袋）均有备货。仓库现货通常在2000-5000吨，其中小包副牌备货300-600吨、箱装副牌备货150-300吨、大包料/吨包料备货1500-4100吨。供应保障：批次留样可溯，每批留样存档，出库附出厂检测数据，透光率、雾度、熔融指数与批号一一对应。化妆品包装、透明瓶、片材客户可报制品类型询价。
选型口诀与案例
国产PETG副牌选料三句话：CHDM一体化认厂，透光雾度每批测，回收片别当副。
A factory in Ningbo that makes transparent cosmetic bottles took a batch of "PETG sub-brands" from middlemen last year. The bottles fogged up, the printed layer peeled off when wiped, and after testing, nearly 30% recycled material was found inside. The boss returned the goods and realized one thing: for transparent PETG, whether the sub-brand is reliable or not, you first need to see which company is the source and who supplies the CHDM monomer. The domestic PETG line truly combines monomers and polymers with Wanhua Chemical. What is
PETG? The domestic market
PETG is ethylene glycol-modified transparent copolyester, copolymerized from PTA, EG, and CHDM monomers. It is completely amorphous, highly translucent, easy to color, and has good heat sealability. It is widely used in cosmetic bottles, food containers, transparent sheets, 3D printing filaments, and heat shrink labels. Its main weakness lies in CHDM—cyclohexanedimethanol, a key copolymer monomer that has long relied on imports. Once the monomer is blocked, resin has to follow import prices. Global PETG was originally dominated by Eastman (USA) and SK Chemical (Korea). In recent years, domestic substitution has accelerated: Wanhua Chemical has built its own CHDM industrial unit in Yantai and equipped with a PETG slicing line. The original 60,000-ton PBAT flexible unit has been switched to PETG production through technical upgrades, transitioning from monomer to polymerization; Wankai New Materials has already started producing tens of thousands of tons of PETG, and Zhejiang Wanma Polymer has also achieved mass production. In terms of the degree of CHDM self-supply and copolymerization, Wanhua Chemical is an indispensable player on this domestic line. Looking downstream, cosmetics and daily chemical packaging account for the majority of consumption, while food containers, transparent sheets, and 3D printing are incremental directions. Where do
PETG sub-brands come from, and how are they separated from recycled sheets
PETG sub-brands come from the start and end of the polymerization unit's start-up and shutdown, transition materials from grade switching, and batches with slight deviations in light transmittance or hue due to process fluctuations. They are still original PETG pellets from the original factory, with an amorphous transparent framework consistent with genuine products, with slight fluctuations in individual indicators, not recycled material for pelletizing. Distinguish between PETG sub-brands and recycled sheets: recycled sheets (transparent bottles, crushed edges of sheets) have undergone a hot history, are prone to yellowing, black spots, and printing residues, with unstable light transmittance and mechanics; Original sub-brands are polymerized products. Don't use recycled transparent sheets as PETG sub-brands to match cosmetic bottles or food contact parts. PETG sub-brands are classified by light transmittance and melt index; deviations in light transmittance and haze directly affect the bottle's appearance, so light transmittance and haze must be measured before injection.
In-depth Profile of Leading Companies: Wanhua Chemical
Wanhua Chemical is headquartered in Yantai and was originally a polyurethane giant. In recent years, it has expanded its new material territory toward high-transparency copolyester. Its confidence in making PETG lies in CHDM—a self-built CHDM industrialized facility, which holds the previously bottleneck-most copolymer monomer in hand, then pairs it with PETG slicing and polymerization lines to form an integrated monomer to resin. Its PETG products target cosmetic packaging, food containers, transparent sheets, and 3D printing, focusing on high light transmission, easy printing, and stable heat sealing. Its secondary brands mostly come from flexible device brand switching and start/stop. The light transmittance is slightly unstable and the hue is slightly deeper, but the amorphous transparent frame and processing window are the same system as the genuine brand. For general cosmetic bottles, non-food contact transparent parts, and transparent sheets, the secondary brand offers a clear cost-performance advantage over imported PETG. In the second tier, Wankai New Materials is ramping up in bottle flakes and PETG, Zhejiang Wanma Polymer has mass-produced PETG, and Daunhefu is supporting CHDM projects in copolyester, mostly resin polymerization or modified lines. CHDM integration is not as deep as Wanhua's and is only considered industry background. In terms of price, CHDM self-supply gives Wanhua PETG an extra cost buffer when facing Eastman and SK quotes, and downstream injection and blow-blow mills have significantly increased acceptance of domestic transparent copolyester in recent years.
PETG secondary brand selection pitfalls
First, recognize the source of CHDM integration. PETG unit price is not low, but repackaging carries high risks of mixing recycled materials, so original packaging must be accompanied by batch numbers. Second, measure light transmittance and haze; transparent bottles are sensitive to appearance, so each batch checks light transmission, haze, and hue. Third, food contact parts must be genuine or have corresponding compliant grades; secondary brands are used for general packaging and non-food parts. Fourth, drying: PETG absorbs moisture and is thoroughly dried before injection molding; aqueous particles may appear silvery or foggy. Fifth, batch samples are traceable; after each batch retained sample, discharge fogging or printing can be traced back. Additionally, be wary of using PMMA blends to pass off as PETG secondary brands—PMMA is brittle, has poor heat sealability, and blow-injection bottles are prone to cracking. Heat sealing and drop tests will reveal the difference.
Cologne Warehouse Stock
Cologne Warehouse Stock Main recommended brand: Wanhua Chemical PETG transparent copolyester sub-brand material. Main grades: cosmetic bottles, food containers, transparent sheets, amorphous transparent grade special materials for 3D printing. Packaging specifications: Both small and large packages (ton bags) are stocked. Warehouse stock is usually 2000-5000 tons, with small sub-brand stocks at 300-600 tons, boxed sub-brands at 150-300 tons, and large packages/ton at 1500-4100 tons. Supply guarantee: Batch samples are traceable, each batch is archived, factory inspection data is attached when outbound, and light transmittance, haze, and melting index are matched one-to-one with batch numbers. Customers for cosmetic packaging, transparent bottles, and sheets can request product type quotes.
Selection Mnemonics and Case Studies
Domestic PETG Sub-brand Material Selection Three Sentences: CHDM integrated factory recognition, light transmittance haze tested per batch, recycled sheets treated as duplicates
