COC多少钱一公斤？
这个问题一搜，从五十块一公斤到一百五十块一公斤，报价差得比环烯烃含量还多。有人说我买的五十的国产通用用得挺好，有人说我买的一百五十的进口高透明才叫高端。到底差在哪？
说实话，问COC多少钱一公斤的人，大概率还没搞懂COC这东西不是一个料——通用级、高透明级、高耐热级、医用级、光学级，每个分支价格都不一样。你拿通用级的价和光学级比，那不叫比价，叫被忽悠。
COC就是环烯烃共聚物，由环烯烃和乙烯共聚制得，高透明、高耐热、低吸湿，常用于光学镜片、医疗耗材、电子电器、包装、薄膜。
一、主流牌号报价（外企+中企）
先把市面上走量的牌号和参考价摆出来。以下为近期市场参考价，实时价格以当日询价为准。
进口COC（外企大厂）
通用级，参考价约80-110元/公斤。电子电器、包装、薄膜。
高透明级，参考价约100-130元/公斤。光学镜片、展示用品、高端包装。
医用级，参考价约120-150元/公斤。医疗耗材、药品包装、特殊应用。
国产COC（中企大厂）
通用级，参考价约50-75元/公斤。性价比高，电子电器、包装、薄膜。
高透明级，参考价约65-95元/公斤。光学镜片、展示用品、高端包装。
光学级，参考价约75-110元/公斤。高端光学、镜头、特殊应用。
一句话总结：国产通用50-75块，国产高透明/光学65-110块，进口通用80-110块，进口高透明/医用100-150块。你要的是啥环烯烃含量和性能，决定了你该在哪一档选。
二、同是COC，价差凭什么这么大
COC的价格差，主要藏在四个地方。
第一，环烯烃含量不同。低环烯烃便宜，高环烯烃贵。环烯烃含量越高，耐热性和透明度越好，但价格更高。
第二，透明等级不同。通用级便宜，高透明/光学级贵。高透明需要特殊工艺，价格更高。
第三，用途不同。通用级便宜，医用/光学级贵。特殊用途需要特殊认证，价格更高。
第四，品牌和产地。进口溢价高但批次稳定，国产性价比高但牌号少。同样是高透明级，进口比国产贵30-50%，贵的是品控和研发。
三、采购避坑：别让环烯烃含量骗了你
我见过太多采购，比价比到最后选了最便宜的五十的，然后做出来的制品透明差、有雾度、客户退货，一次损失够买半年的好料。
COC采购这行，水比你想的深。三个坑必须绕开：
第一，看透光率和热变形温度不看牌号。同一个牌号不同批次性能可能波动，拿到料先测透光率和热变形温度，和COA对得上再用。别听销售说"差不多"，差不多就是差很多。
第二，警惕以次充好。有些贸易商拿PMMA当COC卖，拿低环烯烃当高环烯烃卖。要COA、要环烯烃含量检测、要原厂包装，三证合一才敢用。
第三，别只比单价，算综合成本。A料单价50块，做出来制品次品率5%；B料单价75块，次品率1%。算到每件制品上，B料反而更便宜。
四、标准牌号满足不了？看看改性方案
如果你发现标准牌号怎么选都差点意思——比如要高透明又要高耐热、要低吸湿又要高流动、要低成本又要医用级——那不是COC的问题，是你需要的不是标准COC，是改性COC。
这时候可以看看宁波科隆新材目前在做的高性能改性COC方案，玻纤增强、阻燃、耐候、导电这些方向都有对应牌号在做。有特殊需求的可以私信要一份改性COC的报价参考，比自己买基料再加助剂调试，省的不只是钱，还有试错的时间。
说白了，标准料是大锅饭，改性料是定制菜。你的制品要求越高，越需要定制。
五、常用牌号，私信给你当日报价
上面的价格都是参考价，COC行情一天一个样，环烯烃、乙烯、催化剂、纯度提纯剂、汇率都在动。
如果你需要进口、国产这些品牌的具体牌号当日报价，私信我，发你一份实时价格表。不绕弯子，报实数。
写在最后
买COC这事儿，五十的和一百五十的，差的不是一百。
单价是门槛，选对环烯烃含量和性能才是底线。别让报价单上的数字迷惑了你——你买的不是一公斤塑料，是一公斤能做出高透明光学镜片的方案。把账算到每件制品上，再加上次品退货损失，你才知道谁真便宜谁真贵。
你在COC采购上踩过什么坑？是透明差还是有雾度？评论区聊聊，点赞最高的三位，送一份COC主流牌号选型对照表。
COC和PMMA有什么区别
COC环烯烃含量怎么选
COC和COP有什么区别
COC改性料厂家怎么选
COC注塑常见问题及解决
How much is COC per kilogram?
A quick search shows quotes ranging from CNY 50/kg to CNY 150/kg — a spread wider than the cyclo-olefin content itself. Some buyers say the CNY 50 domestic general-purpose grade works fine; others insist only the CNY 150 imported high-transparency grade counts as premium. Where does the difference really lie?
Honestly, anyone asking "how much is COC per kilo" probably has not yet understood that COC is not a single material — general-purpose, high-transparency, high-heat, medical and optical grades each carry a different price. Comparing a general-purpose quote with an optical grade is not price comparison; it is how you get fooled.
COC is cyclic olefin copolymer, made by copolymerizing cyclo-olefin with ethylene. It offers high transparency, high heat resistance and low moisture absorption, and is commonly used in optical lenses, medical consumables, electronics, packaging and film.
1. Mainstream grade quotes (imported + domestic)
Here are the high-volume grades and reference prices on the market. Figures below are recent market references; live prices are subject to same-day inquiry.
Imported COC (overseas majors)
General-purpose grade, approx. CNY 80-110/kg. Electronics, packaging, film.
High-transparency grade, approx. CNY 100-130/kg. Optical lenses, display products, premium packaging.
Medical grade, approx. CNY 120-150/kg. Medical consumables, pharmaceutical packaging, special applications.
Domestic COC (Chinese majors)
General-purpose grade, approx. CNY 50-75/kg. Cost-effective; electronics, packaging, film.
High-transparency grade, approx. CNY 65-95/kg. Optical lenses, display products, premium packaging.
Optical grade, approx. CNY 75-110/kg. Premium optics, lenses, special applications.
In short: domestic general-purpose CNY 50-75, domestic high-transparency/optical CNY 65-110, imported general-purpose CNY 80-110, imported high-transparency/medical CNY 100-150. The cyclo-olefin content and performance you need decide which tier you belong in.
2. Why do COC prices differ so much
The COC price gap mainly hides in four factors.
First, cyclo-olefin content. Low cyclo-olefin is cheap; high cyclo-olefin costs more. The higher the cyclo-olefin content, the better the heat resistance and transparency, but the higher the price.
Second, transparency grade. General-purpose is cheap; high-transparency/optical grades are expensive. High transparency needs special processing and costs more.
Third, application. General-purpose is cheap; medical/optical grades are expensive. Special applications need special certifications and cost more.
Fourth, brand and origin. Imports carry a premium but offer batch stability; domestic grades offer value but fewer options. For the same high-transparency grade, imported costs 30-50% more than domestic — you pay for quality control and R&D.
3. Procurement pitfalls: don't let the cyclo-olefin content fool you
I have seen too many buyers end up choosing the cheapest CNY 50 material after endless price comparison, only to have parts fail on transparency and haze, trigger customer returns — one loss enough to buy half a year of good material.
Procurement of COC is deeper water than you think. Three traps must be avoided:
First, test light transmittance and heat deflection temperature instead of trusting the grade name. Performance of the same grade can fluctuate between batches. Test against the COA before use. Don't listen to salespeople saying "close enough" — close enough is far apart.
Second, watch out for substitution fraud. Some traders sell PMMA as COC, or low-cyclo-olefin as high-cyclo-olefin. Demand the COA, a cyclo-olefin-content test and original packaging. Only accept material with all three.
Third, don't compare unit price alone — calculate total cost. Material A at CNY 50/kg yields a 5% defect rate; material B at CNY 75/kg yields 1%. Per finished part, B is actually cheaper.
4. Standard grades not enough? Consider modified compounds
If standard grades always fall short — you need high transparency AND high heat resistance, low moisture absorption AND high flow, or low cost AND medical grade — the problem is not COC itself; you don't need standard COC, you need modified COC.
Ningbo Kolong New Materials is developing high-performance modified COC solutions, with grades covering glass-fiber reinforcement, flame retardancy, weather resistance and conductivity. For special needs, message us for a modified COC quote reference — it saves not only money but also trial-and-error time compared with buying base resin and tuning additives yourself.
In plain terms: standard grades are a big pot of shared rice; modified compounds are a dish cooked to order. The higher your requirements, the more you need customization.
5. Popular grades — same-day quotes via message
All prices above are references. COC prices change daily — cyclo-olefin, ethylene, catalysts, purification agents and exchange rates all move.
If you need same-day quotes for specific imported or domestic grades, message us and we will send a live price sheet. No beating around the bush — real numbers.
Final words
For COC, the difference between CNY 50 and CNY 150 is not CNY 100.
Unit price is the threshold; choosing the right cyclo-olefin content and performance is the baseline. Don't let the quote sheet fool you — you are not buying one kilogram of plastic, you are buying a solution for making high-transparency optical lenses. Do the math per finished part, add in the loss from rejected goods, and you will know who is truly cheap and who is truly expensive.
What pitfalls have you hit when buying COC — poor transparency or haze? Share in the comments; the three most-liked readers will receive a COC grade selection guide.
