很多人以为PPSU是塑料里“娇贵”的那种——透明、耐煮、做婴儿奶瓶，价格贵到一个壳要几十块，碰一下就怕花。真相恰恰相反：PPSU是聚砜家族里耐冲击、耐反复消毒那档，它不怕煮、不怕蒸汽、不怕伽马射线，脆的根本不是它。
真正让做奶瓶、做医疗器械的老板头疼的，是正牌贵到报价手抖，回料煮三回就发雾发黄，中间那档“又要便宜又要耐消毒”的料，到底去哪找。答案就在大厂副牌里。
PPSU：聚砜三兄弟里耐冲击耐消毒的那个
PPSU，聚苯砜，聚砜三兄弟里耐冲击和耐消毒的那个（另外两个是PSU和PES）。琥珀色透明，玻璃化转变两百二十度上下，能扛反复高压灭菌、伽马辐照、环氧乙烷，做婴儿奶瓶、医疗灭菌盘、牙科器械、饮水机龙头。它比PSU耐冲击、比PES韧性好，是医疗和婴童用品的心头好。
全球前三家国外企业，按产能份额排：比利时索尔维(现世索科Syensqo)的Radel R，全球份额约三到四成；德国巴斯夫(BASF)的Ultrason P，份额约两到三成；日本住友化学(Sumitomo Chemical)的Sumikaexcel系列。这三家是PPSU原树脂的第一梯队，后面才轮到改性厂和国内追赶。这是按产能份额排的梯队口径。
PPSU副牌：原厂原生粒，过不了认证的别硬上
PPSU副牌怎么来的？索尔维或巴斯夫同一牌号、同一聚合线下来的原生粒子，分子链一致，只是出厂检验时透明度、色差、熔指个别指标小幅偏出内控线，走副牌。四大来源：开停车头尾料、切牌号过渡料、工艺波动致色差或熔指飘移批次、副线尾料。
跟回料的边界在这行特别要讲透：PPSU做医疗和婴童用品，要的是耐反复消毒、不析出、不黄变。回料是已经过热历史的料，再经蒸煮就发雾发黄，还可能有析出；再生料波动更大，根本过不了食品接触和医疗认证。副牌是原厂原生粒，批次可追溯。要提醒：PPSU副牌适合一般灭菌件、非植入级医疗件、婴童用品内件；做植入级、做需要完整生物相容性认证的关键件，该用正牌还得用正牌。包装分大包装小包装。
索尔维Radel R：医疗认证厚，灭菌盘牙科件都认它
索尔维是这行的老大哥，Radel R是PPSU的标杆牌子，医疗级认证积累深，灭菌盘、牙科器械、骨科件都认它。它的副牌特点是耐消毒底子稳，做一般灭菌托盘、饮水机部件，副牌性价比出来了。
要注意：Radel R有医疗级和工业级两条线，副牌别硬往植入级医疗件上套，认证那张卡副牌没有。
巴斯夫Ultrason P：食品接触和婴童用品布局早
第二家德国巴斯夫的Ultrason P。巴斯夫在食品接触和婴童用品这块布局早，婴儿奶瓶、咖啡机部件、餐具都认它。它的副牌在婴童用品、食品接触件里流通不少。
巴斯夫的脾气是牌号按食品接触和耐水解分得细，做反复蒸煮的奶瓶就配耐水解档。
住友Sumikaexcel：电子高端，牌号偏特色应用
第三家日本住友化学的Sumikaexcel。住友在电子级薄膜、连接器结构件这块做得有特色，PPSU牌号偏高端应用。它的副牌在工业件、电子件里能见到。
三家对比：索尔维医疗认证厚、巴斯夫食品婴童强、住友电子高端。选PPSU副牌，先定你要医疗级、食品级还是工业级，再对牌号。
PPSU副牌三个坑：黄变、耐消毒、认证
一是黄变，做透明奶瓶、透明灭菌件的，副牌色差或黄度指数偏一点，客户验货就判发黄，做透明件先测黄度。二是耐反复消毒，副牌某档耐蒸汽次数不够，煮几十次就发雾，做灭菌件先做老化验证。
三是认证，食品接触和医疗级要合规证书，副牌有没有对应认证要看清，别拿工业级副牌去打婴童奶瓶。另外PPSU注塑温度高，烘干和控温不能省。大包装适合批量奶瓶和灭菌盘，小包装适合打样。
科隆仓库现货｜PPSU看货
主推品牌：索尔维/世索科、德国巴斯夫、日本住友化学
主要牌号：Radel R、Ultrason P、Sumikaexcel
包装规格：原厂原包，分大包装与小包装两种；小包副牌、箱装副牌、大包料/吨包料分档码放，按批量备货
仓库现货：PPSU副牌仓库现货通常在2000-5000吨
现货明细：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，每批进厂留底留样，批次台账可查
PPSU副牌选料口诀
一看等级，植入级和关键医疗件用正牌认证料；二测黄度色差，透明件先过黄度指数；三做耐消毒老化，灭菌件过反复蒸煮；四查食品接触认证，婴童件卡合规；五按工艺卡烘干，高温注塑不偷懒。
南阳有家做婴儿奶瓶和灭菌托盘的客户，之前非索尔维正牌Radel不用，一个奶瓶壳成本压不下来。后来把非直接进嘴的托盘件、二级壳体件换了同牌号副牌，耐蒸汽反复灭菌、透明度跟正牌对在一个区间，黄度指数验过，奶瓶壳成本下来一截，直接接触婴童口腔的关键件仍走正牌认证料。
这就是PPSU选副牌的分寸——耐消毒和透明的底子副牌没丢，认证和黄变才是分界线。正牌PPSU贵到一个奶瓶壳报价手都抖，回料PPSU煮三回就发雾发黄，大厂副牌PPSU把耐反复消毒和成本两头都接住。宁波市科隆新材料有限公司做进口PPSU副牌多年，索尔维、巴斯夫、住友的渠道都稳，医疗和婴童件选料的案子处理不少。
Many people think PPSU is the kind of 'delicate' plastic—transparent, boilable, used for baby bottles, and so expensive that a single piece costs dozens of yuan, and you worry it might get scratched with just a touch. The truth is quite the opposite: PPSU belongs to the polysulfone family and is impact-resistant and can withstand repeated sterilization. It is not afraid of boiling, steam, or gamma rays. The brittle one is not it at all.
What really gives bosses who make baby bottles and medical devices headaches is that the genuine brand is so expensive that quoting it makes your hands shake, the recycled material turns foggy and yellow after boiling three times, and the mid-range material that is supposed to be both cheap and resistant to sterilization – where exactly can you find it? The answer lies in the sub-brands of big manufacturers.
PPSU: The one among the three polysulfone brothers that is impact-resistant and disinfectant-resistant
PPSU, polyphenylsulfone, the one among the three polysulfones that is resistant to impact and sterilization (the other two are PSU and PES). Amber-colored and transparent, with a glass transition around 220°C, it can withstand repeated high-pressure sterilization, gamma radiation, and ethylene oxide, and is used for baby bottles, medical sterilization trays, dental instruments, and water dispenser taps. It is more impact-resistant than PSU and tougher than PES, making it a favorite for medical and baby products.
The top three foreign companies globally, ranked by production capacity share, are: Solvay (now Syensqo) of Belgium with Radel R, holding about 30-40% of the global market; BASF of Germany with Ultrason P, holding about 20-30%; and Sumitomo Chemical of Japan with the Sumikaexcel series. These three companies form the first tier for PPSU virgin resin, followed by modifier manufacturers and domestic competitors. This ranking is based on production capacity share.
PPSU sub-brand: original factory native granules, don't force it if it can't pass certification
How did PPSU secondary grades come about? They are native pellets from the same grade and same polymerization line of Solvay or BASF, with identical molecular chains. They are only classified as secondary grades when, during factory inspection, certain indicators like transparency, color difference, or melt index slightly fall outside the internal control limits. There are four main sources: start-and-stop tail materials, transitional materials between grades, batches with color differences or melt index deviations due to process fluctuations, and tail materials from secondary lines.
The boundary with recycled material needs to be clearly explained in this line: PPSU used for medical and baby products requires resistance to repeated sterilization, no leaching, and no yellowing. Recycled material has already been heat-processed; after further sterilization, it can become cloudy and yellow, and may also leach substances. Reprocessed material fluctuates even more and cannot pass food contact or medical certifications. The secondary brand uses original manufacturer virgin pellets, and batches are traceable. It should be noted: PPSU secondary brand is suitable for general sterilizable parts, non-implant medical parts, and internal parts of baby products; for implants or critical parts requiring full biocompatibility certification, the genuine brand must be used. Packaging is divided into large and small packages.
Solvay Radel R: Strong medical certification, sterilization trays and dental parts all recognize it
Solvay is the big brother in this field. Radel R is the benchmark brand for PPSU, with extensive medical-grade certification; it is recognized for sterilization trays, dental instruments, and orthopedic components. Its sub-brand is characterized by a strong foundation for sterilization resistance, used for general sterilization trays and water dispenser parts, making the sub-brand cost-effective.
Note: Radel R has both medical-grade and industrial-grade lines. Don't try to force the sub-brand onto implantable medical devices; the sub-brand doesn't have that certification.
BASF Ultrason P: Early layout for food contact and baby products
The second German company is BASF's Ultrason P. BASF has an early layout in food contact and baby products; it is recognized in baby bottles, coffee machine parts, and tableware. Its sub-brands are quite popular in baby products and food contact items.
BASF's grades are classified according to food contact and hydrolysis resistance. For baby bottles that undergo repeated boiling, the hydrolysis-resistant grade is suitable.
Sumitomo Sumika Excel: High-end electronics, grades geared towards specialized applications
The third one is Japan's Sumitomo Chemical Sumikaexcel. Sumitomo has distinctive work in electronic-grade films and connector components, with PPSU grades geared toward high-end applications. Its sub-brands can be seen in industrial parts and electronic components.
Comparison of three companies: Solvay is strong in medical certification, BASF is strong in food and baby products, and Sumitomo is strong in high-end electronics. When choosing a PPSU sub-brand, first decide whether you need medical grade, food grade, or industrial grade, and then choose the grade number.
Three pitfalls of PPSU sub-brands: yellowing, disinfectant resistance, certification
First is yellowing. For making transparent baby bottles or transparent sterilization parts, if a secondary brand has slight color differences or a slightly higher yellowness index, the customer will judge it as yellowed during inspection. For transparent parts, measure the yellowness first. Second is resistance to repeated disinfection. If a secondary brand cannot withstand enough steam cycles, it will become foggy after boiling dozens of times. For sterilization parts, perform aging verification first.
Third, certification: food contact and medical-grade products need compliant certificates. You need to check whether sub-brands have corresponding certifications; don't use industrial-grade sub-brands for baby bottles. In addition, PPSU has a high injection molding temperature, so drying and temperature control cannot be neglected. Large packaging is suitable for batch baby bottles and sterilization trays, while small packaging is suitable for sampling.
Cologne Warehouse Stock | PPSU Inspection
Main recommended brands: Solvay/Sesqucco, Germany BASF, Japan Sumitomo Chemical
Main grades: Radel R, Ultrason P, Sumikaexcel
Packaging specifications: Original factory packaging, available in large and small packs; small packs are sub-branded, boxed sub-branded, large pack materials/ton bags are sorted by grade and stacked, stocked according to batch quantity
Warehouse Spot: PPSU secondary brand warehouse stock is usually between 2,000-5,000 tons
Spot details: Small package secondary brand stock 300-600 tons, boxed secondary brand stock 150-300 tons, large package/material per ton stock 1500-4100 tons
Supply Assurance: Batch samples can be traced; each batch entering the factory is retained and sampled, and the batch ledger can be checked.
PPSU Sub-Brand Material Selection Mnemonic
First, check the grade; for implanted and critical medical parts, use genuine certified materials. Second, measure yellowness and color difference; transparent parts must first meet the yellowness index. Third, test resistance to disinfection and aging; sterilized parts should withstand repeated boiling. Fourth, check food contact certification; infant and child parts must comply according to the compliance checklist. Fifth, dry according to the process card and do not cut corners on high-temperature injection molding.
There is a client in Nanyang that makes baby bottles and sterilization trays. Previously, they did not use the genuine Solvay Radel, and the cost of a single bottle shell could not be reduced. Later, they replaced the parts of the trays that do not directly touch the mouth and the secondary shell parts with a same-grade generic brand. These parts can withstand repeated steam sterilization, and their transparency is in the same range as the genuine brand. The yellowness index has been tested, and the cost of the bottle shells has been reduced. The key parts that directly contact a baby’s mouth still use the certified genuine material.
This is the measure for choosing PPSU secondary brands — the secondary brand still retains a base that is resistant to disinfection and transparent; certification and yellowing are the dividing lines. Genuine PPSU is so expensive that quoting for a single bottle shell makes hands tremble, while recycled PPSU turns foggy and yellow after boiling three times. Large manufacturers' secondary brand PPSU manages to withstand repeated disinfection and control costs on both ends. Ningbo Kolon New Materials Co., Ltd. has been producing imported PPSU secondary brands for many years, with stable channels from Solvay, BASF, and Sumitomo, and has handled many cases of material selection for medical and baby products.
