COP多少钱一公斤？
这个问题一搜，从六十块一公斤到两百块一公斤，报价差得比分子量还多。有人说我买的六十的国产通用用得挺好，有人说我买的两百的进口超高纯才叫高端。到底差在哪？
说实话，问COP多少钱一公斤的人，大概率还没搞懂COP这东西不是一个料——通用级、高透明级、超高纯级、医用级、光学级，每个分支价格都不一样。你拿通用级的价和超高纯比，那不叫比价，叫被忽悠。
COP就是环烯烃聚合物，由环烯烃开环易位聚合制得，超高透明、高耐热、低双折射，常用于高端光学镜片、医疗耗材、电子电器、薄膜、特殊应用。
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COP（外企大厂）
通用级，参考价约100-140元/公斤。电子电器、包装、薄膜。
高透明级，参考价约130-170元/公斤。高端光学镜片、展示用品、特殊应用。
超高纯级，参考价约160-200元/公斤。高端医疗、半导体、特殊应用。
国产COP（中企大厂）
通用级，参考价约60-90元/公斤。性价比高，电子电器、包装、薄膜。
高透明级，参考价约80-120元/公斤。高端光学镜片、展示用品、特殊应用。
光学级，参考价约95-140元/公斤。高端光学、镜头、特殊应用。
一句话总结：国产通用60-90块，国产高透明/光学80-140块，进口通用100-140块，进口高透明/超高纯130-200块。你要的是啥分子量和性能，决定了你该在哪一档选。
二、同是COP，价差凭什么这么大
COP的价格差，主要藏在四个地方。
第一，分子量不同。低分子量便宜，高分子量贵。分子量越高，耐热性和强度越好，但加工难度越大。
第二，纯度不同。通用级便宜，超高纯级贵。超高纯需要特殊提纯工艺，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：别让分子量骗了你
我见过太多采购，比价比到最后选了最便宜的六十的，然后做出来的制品透明差、双折射高、客户退货，一次损失够买半年的好料。
COP采购这行，水比你想的深。三个坑必须绕开：
第一，看透光率和双折射不看牌号。同一个牌号不同批次性能可能波动，拿到料先测透光率和双折射，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COC当COP卖，拿低分子量当高分子量卖。要COA、要分子量检测、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60块，做出来制品次品率5%；B料单价90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——比如要超高透明又要高耐热、要低双折射又要高流动、要低成本又要医用级——那不是COP的问题，是你需要的不是标准COP，是改性COP。
这时候可以看看宁波科隆新材目前在做的高性能改性COP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COP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，COP行情一天一个样，环烯烃、催化剂、分子量调节剂、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COP这事儿，六十的和两百的，差的不是一百四。
单价是门槛，选对分子量和性能才是底线。别让报价单上的数字迷惑了你——你买的不是一公斤塑料，是一公斤能做出超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COP采购上踩过什么坑？是透明差还是双折射高？评论区聊聊，点赞最高的三位，送一份COP主流牌号选型对照表。
COP和COC有什么区别
COP分子量怎么选
COP和PMMA有什么区别
COP改性料厂家怎么选
COP注塑常见问题及解决
How much is COP per kilogram?
A quick search shows quotes ranging from CNY 60/kg to CNY 200/kg — a spread wider than the molecular weight itself. Some buyers say the CNY 60 domestic general-purpose grade works fine; others insist only the CNY 200 imported ultra-high-purity grade counts as premium. Where does the difference really lie?
Honestly, anyone asking "how much is COP per kilo" probably has not yet understood that COP is not a single material — general-purpose, high-transparency, ultra-high-purity, medical and optical grades each carry a different price. Comparing a general-purpose quote with an ultra-high-purity one is not price comparison; it is how you get fooled.
COP is cyclic olefin polymer, produced by ring-opening metathesis polymerization of cyclo-olefin. It offers ultra-high transparency, high heat resistance and low birefringence, and is commonly used in premium optical lenses, medical consumables, electronics, film and special applications.
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 COP (overseas majors)
General-purpose grade, approx. CNY 100-140/kg. Electronics, packaging, film.
High-transparency grade, approx. CNY 130-170/kg. Premium optical lenses, display products, special applications.
Ultra-high-purity grade, approx. CNY 160-200/kg. Premium medical, semiconductors, special applications.
Domestic COP (Chinese majors)
General-purpose grade, approx. CNY 60-90/kg. Cost-effective; electronics, packaging, film.
High-transparency grade, approx. CNY 80-120/kg. Premium optical lenses, display products, special applications.
Optical grade, approx. CNY 95-140/kg. Premium optics, lenses, special applications.
In short: domestic general-purpose CNY 60-90, domestic high-transparency/optical CNY 80-140, imported general-purpose CNY 100-140, imported high-transparency/ultra-high-purity CNY 130-200. The molecular weight and performance you need decide which tier you belong in.
2. Why do COP prices differ so much
The COP price gap mainly hides in four factors.
First, molecular weight. Low molecular weight is cheap; high molecular weight costs more. The higher the molecular weight, the better the heat resistance and strength, but the harder the processing.
Second, purity. General-purpose is cheap; ultra-high-purity is expensive. Ultra-high purity needs special purification processes 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 molecular weight fool you
I have seen too many buyers end up choosing the cheapest CNY 60 material after endless price comparison, only to have parts fail on transparency and high birefringence, trigger customer returns — one loss enough to buy half a year of good material.
Procurement of COP is deeper water than you think. Three traps must be avoided:
First, test light transmittance and birefringence 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 COC as COP, or low-molecular-weight as high-molecular-weight. Demand the COA, a molecular-weight test and original packaging. Only accept material with all three.
Third, don't compare unit price alone — calculate total cost. Material A at CNY 60/kg yields a 5% defect rate; material B at CNY 90/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 ultra-high transparency AND high heat resistance, low birefringence AND high flow, or low cost AND medical grade — the problem is not COP itself; you don't need standard COP, you need modified COP.
Ningbo Kolong New Materials is developing high-performance modified COP solutions, with grades covering glass-fiber reinforcement, flame retardancy, weather resistance and conductivity. For special needs, message us for a modified COP 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. COP prices change daily — cyclo-olefin, catalysts, molecular-weight regulators, 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 COP, the difference between CNY 60 and CNY 200 is not CNY 140.
Unit price is the threshold; choosing the right molecular weight 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 ultra-transparent 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 COP — poor transparency or high birefringence? Share in the comments; the three most-liked readers will receive a COP grade selection guide.
