先揭一个行业乱象：PET副牌市场上，拿 bottle级正牌的头尾料当副牌卖的、拿再生瓶片掺原生切片的、拿改性回料混进大包装的，三种货摆在同一堆里，外行根本分不出来。结果就是做片材的厂买回去，透明度不够、乙醛超标，挤出片材发雾；做打包带的厂买回去，拉伸强度忽高忽低。今天把万凯新材、华润材料、三房巷这三家国产PET头部企业的副牌货源，盘点清楚。
结论先说：PET副牌不是不能用，是得看粘度、看乙醛、看是不是原厂原生切片，三样对上了才敢切。
PET是什么？国内瓶片格局
PET是聚对苯二甲酸乙二醇酯，透明、阻隔性好、强度适中、易成型，大量用于饮料瓶、矿泉水瓶、片材、打包带、纤维、包装薄膜。瓶级PET（瓶片）是PET里量大面广的品种，中国是全球瓶片产能和出口大国。
国内瓶级PET产能高度集中，头部几家合计占了七八成。按名义产能口径，逸盛石化、三房巷、华润材料、万凯新材排在前列。本篇聚焦三家独立上市的头部企业：万凯新材瓶片年产能约300万吨，华润材料（常州加珠海）约330万吨，三房巷瓶片产能也在数百万吨级。行业集中度高，意味着副牌货源主要就从这几家大厂流出。
PET副牌：粘度和乙醛是两个命门
PET副牌，是原厂同一牌号体系里检验指标小幅偏离的批次。落到PET上，指标容易飘的集中在三项：特性粘度波动、乙醛含量偏高、色相（L值和b值）偏差。
为什么盯这三项？特性粘度决定PET的分子量，粘度波动直接影响瓶坯拉伸和片材厚度均匀性。乙醛含量关系到饮用水接触的口感和卫生指标。色相偏差影响透明和浅色制品外观。
和回料的区别：PET回料是矿泉水瓶、片材破碎再造粒，已经经过一次热历史，粘度下降、乙醛波动大、透明度差；PET副牌是原厂原生聚酯切片，只是个别指标小幅偏离。做饮料瓶，用副牌是“乙醛过不过检测”的问题，用回料是“能不能上吹瓶线”的问题。
万凯新材：瓶片出口龙头
万凯新材是国内瓶级PET头部生产企业，年产能约300万吨，产品覆盖水瓶级、碳酸瓶级、热灌装级和片材级，出口比例高，在东南亚和中东市场有稳定客户。代表牌号以水瓶级和碳酸级瓶片为主。
副牌料的特点：产能规模大、牌号体系全，批次管理规范；水瓶级副牌适合片材、打包带、非食品包装等对乙醛要求不极端的制品；浙江海宁产能，长三角客户就近提货方便。
适用场景：片材、打包带、非食品包装瓶、纤维、改性基料。
华润材料：双基地布局
华润材料依托华润集团，常州和珠海双基地，瓶片年产能约330万吨，产品覆盖水瓶级、碳酸级、热灌装级，在食品接触级瓶片领域有稳定客户体系。
副牌料的特点：央企背景，批次管理和检测体系规范；华南（珠海）和华东（常州）双基地，南北客户都能就近覆盖；片材级和打包带级副牌适合对成本敏感的通用包装制品。
适用场景：片材、打包带、包装瓶、纤维、改性基料掺混。
三房巷：民营瓶片大厂
三房巷是民营聚酯瓶片头部企业，瓶级PET年产能数百万吨，产品覆盖水瓶级、超薄碳酸瓶级，长期供应头部饮料客户，在轻量化瓶片上有积累。
副牌料的特点：民营大厂成本控制强，副牌价格竞争力突出；江苏江阴产能，长三角供应距离近；适合对成本敏感、批量大的片材和打包带制品。
适用场景：片材、打包带、包装瓶、纤维、日用包装制品。
PET副牌避坑指南
第一，特性粘度必须和制品匹配。吹瓶要对应瓶坯粘度区间，片材要对应挤出粘度区间，别拿高粘度副牌去打薄壁瓶。
第二，乙醛含量必须测。食品接触级和饮用水瓶，乙醛是硬指标，副牌再便宜也不能碰这一条线。
第三，分清原生副牌和再生回料。PET市场上再生瓶片量大，原生副牌是原厂切片，再生料是回收瓶再造粒，认准大厂原厂原包。
第四，色相影响浅色和透明制品。做透明片材，先看L值和b值，发雾发黄的副牌别用在外观件上。
科隆仓库现货｜国产PET先测后签
科隆在宁波仓库常备国产PET副牌现货，主推品牌覆盖万凯新材、华润材料、三房巷三家国内头部企业。主要牌号涵盖水瓶级、碳酸级、片材级、打包带级多个常用型号，包装分大包装与小包装两种，按牌号分批备货。
仓库现货通常在5000吨左右：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。
供应保障走先测后签：客户确认意向后，科隆先出小样做特性粘度、乙醛含量、色相三项检测，指标落在客户配方区间内再签单发货；小包副牌和箱装副牌方便试样，大包料和吨包料适合批量切料，测不过关不勉强切。
选型口诀与案例
国产PET副牌怎么选？记住四句话：粘度看制品，乙醛看用途，原生回料要分清，透明件先看色相。
嘉兴一家做包装片材的挤出厂，此前一直用进口PET切片做片材，每吨成本高。今年改用科隆供的万凯新材PET副牌片材级，科隆先出小样测了粘度和色相，落在配方区间，先签小单试产，片材透明度和厚度均匀性都达标，批量切料后每吨原料成本降了一千多元。厂长说：做非食品接触片材，副牌粘度够，为什么要花正牌的钱？
First, reveal an industry chaos: In the PET sub-brand market, some sell bottle-grade genuine first-and-tail materials as sub-brands, some mix recycled bottle chips with virgin chips, and some mix modified recycled materials into large packages—these three types are all in one pile, and outsiders can't tell them apart. The result is that when the factory that makes sheets buys it, the transparency is insufficient, acetaldehyde exceeds the standard, and the extruded sheets become foggy; The factory that makes strapping tape products has varying tensile strength. Today, let's take a clear look at the sub-brand supply sources of three leading domestic PET companies: Wankai New Materials, China Resources Materials, and Sanfangxiang.
Conclusion First: PET sub-brands aren't unusable; you have to check viscosity, acetaldehyde, and whether they're genuine factory chips. Only when these three match can you cut them. What is
PET? The domestic bottle-grade PET market
PET polyethylene terephthalate, which is transparent, has good barrier properties, moderate strength, and is easy to mold. It is widely used in beverage bottles, mineral water bottles, sheets, strapping tapes, fibers, and packaging films. Bottle-grade PET (bottle flakes) is a widely used and widely distributed type of PET, and China is a global producer and exporter of bottle flakes.
Domestic bottle-grade PET capacity is highly concentrated, with the top companies accounting for 70-80% combined. By nominal capacity threshold, Yisheng Petrochemical, Sanfangxiang, China Resources Materials, and Wankai New Materials rank at the top. This article focuses on three leading independently listed companies: Wankai New Materials has an annual capacity of about 3 million tons of bottle flakes, China Resources Materials (Changzhou plus Zhuhai) about 3.3 million tons, and Sanfangxiang bottle chip capacity is also in the millions of tons range. High industry concentration means that sub-brand supply mainly flows out from these major factories.
PET sub-brands: viscosity and acetaldehyde are two critical areas
PET sub-brands are batches with slight deviations in inspection indicators within the same original factory grade system. For PET, the indicators tend to fluctuate in three areas: fluctuations in intrinsic viscosity, elevated acetaldehyde content, and hue (L and b values) deviations.
Why focus on these three? Characteristic viscosity determines the molecular weight of PET; viscosity fluctuations directly affect preform stretch and sheet thickness uniformity. Acetaldehyde content affects the taste and hygiene indicators of drinking water. Hue deviation affects the appearance of transparent and light-colored products. Difference between
and recycled material: PET recycled material is recycled from mineral water bottles and sheets crushed and then granulated, having undergone a thermal cycle, resulting in decreased viscosity, large acetaldehyde fluctuations, and poor transparency; PET secondary brands are original original polyester chips, with only slight deviations in certain indicators. When making beverage bottles, using secondary brands is a matter of "acetaldehyde passing test," while returning materials are a matter of "whether it can be used on the blow molding line."
Wankai New Materials: Leading Exporter of Bottle Chips
Wankai New Materials is a leading domestic bottle-grade PET producer, with an annual capacity of about 3 million tons. Its products cover water bottle grade, carbonate bottle grade, hot-fill grade, and sheet grade, with a high export ratio and stable customers in Southeast Asia and the Middle East market. Representative grades mainly include water bottle grade and carbonated bottle flakes. Features of
Sub-brand Materials: Large production capacity, comprehensive grade system, standardized batch management; Water-bottle-grade sub-brand products suitable for sheets, strapping tapes, non-food packaging, and other products with moderate acetaldehyde requirements; Production capacity in Haining, Zhejiang, with convenient nearby pickup for customers in the Yangtze River Delta.
Applicable Scenarios: sheets, strapping tapes, non-food packaging bottles, fibers, modified base materials.
China Resources Materials: Dual-base layout
China Resources Materials relies on China Resources Group, with dual bases in Changzhou and Zhuhai, annual bottle chip production capacity of about 3.3 million tons, products covering water bottle grade, carbonate grade, and hot fill grade, with a stable customer system in the food contact grade bottle chip sector. Features of
sub-brand materials: Central enterprise background, standardized batch management and testing system; Dual bases in South China (Zhuhai) and East China (Changzhou), allowing customers from both the north and south to be locally covered; Sheet-level and strapping-grade sub-brands are suitable for cost-sensitive general packaging products.
Applicable scenarios: sheets, strapping tapes, packaging bottles, fibers, and modified base material blends.
Sanfangxiang: A major private bottle chip manufacturer
Sanfangxiang is a leading private polyester bottle chip company, with an annual bottle-grade PET production capacity of several million tons. Its products cover water bottle level and ultra-thin carbonate bottle level, supplying leading beverage customers long-term and accumulating experience in lightweight bottle chips.
Characteristics of sub-brand materials: strong cost control by large private manufacturers, with outstanding price competitiveness for sub-brands; Jiangyin, Jiangsu production capacity, and close supply distance in the Yangtze River Delta; Suitable for cost-sensitive and large-batch sheets and strapping products.
Applicable scenarios: sheets, strapping tapes, packaging bottles, fibers, daily-use packaging products.
PET Secondary Brand Pitfall Avoidance Guide
First, characteristic viscosity must match the product. Blow molding should match the viscosity range of the preform form, and the sheet should be extruded according to the viscosity range. Do not use high-viscosity secondary brands to make thin-walled bottles.
Second, acetaldehyde content must be measured. For food contact grade and drinking water bottles, acetaldehyde is a hard metric; no matter how cheap secondary brands are, don't cross this line.
Third, distinguish between original secondary brands and recycled materials. PET market has large volumes of recycled bottle flakes; original secondary brands are original factory slices, recycled materials are recycled bottles re-pelletized. Look for original packaging from major manufacturers.
Fourth, hue affects light-colored and transparent products. When making transparent sheets, first check the L and b values; avoid secondary brands that are foggy or yellowish on appearance parts.
Cologne Warehouse Stock | Domestic PET Tested Then Signed
Cologne maintains domestic PET sub-brand stock in the Ningbo warehouse, with main brands covering three leading domestic companies: Wankai New Materials, China Resources Materials, and Sanfangxiang. Main grades include water bottle grade, carbonate grade, sheet grade, and strapping tape grade, with packaging available in large and small packages, stocked in batches according to grade.
warehouse stock is usually around 5,000 tons: small sub-brand stock 800-1,000 tons, boxed sub-brand 300-500 tons, and large package/ton material stock 3,500-3,900 tons.
Supply assurance follows the test before signing: after the customer confirms their intention, Cologne first issues samples for characteristic viscosity, acetaldehyde content, and color testing. If the indicators fall within the customer's formula range, the order is signed and shipped; Small package sub-labels and boxed sub-labels facilitate sampling; large and ton-sized packages are suitable for batch cutting; if testing fails, don't force cutting.
Selection tips and case studies
How to choose domestic PET sub-brands? Remember these four points: viscosity depends on the product, acetaldehyde depends on its purpose, original return material must be distinguished, and transparent parts should be checked for color first.
Jiaxing is an extrusion factory specializing in packaging sheets, which previously used imported PET chips for sheets, resulting in high cost per ton. This year, they switched to Wankai New Material PET sub-brand sheets supplied by Cologne. Cologne first released samples to test viscosity and hue, which fell within the formula range. They signed small orders for trial production, and the sheet transparency and thickness uniformity met standards. After batch cutting, the cost per ton of raw material dropped by over 1,000 yuan. The factory director said: For non-food contact sheets, the sub-brand has sufficient viscosity, so why spend money on the genuine brand?
