EVA多少钱一公斤？
这个问题一搜，从七块一公斤到二十五块一公斤，报价差得比VA含量还多。有人说我买的七块的中石化18J3用得挺好，有人说我买的二十五的日本三井EVA260才叫高端。到底差在哪？
说实话，问EVA多少钱一公斤的人，大概率还没搞懂EVA这东西不是一个料——发泡级、注塑级、挤出级、热熔胶级、光伏级，每个分支价格都不一样。你拿发泡级的价和光伏级比，那不叫比价，叫被忽悠。
EVA就是乙烯-醋酸乙烯酯共聚物，柔韧性好、耐低温、耐化学，常用于发泡鞋材、热熔胶、光伏胶膜、薄膜、电线电缆。
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。
中石化（中国）
18J3，VA含量18%通用级，参考价约7.4-9元/公斤。发泡、注塑、薄膜、通用应用。
560，VA含量14%发泡级，参考价约8-12元/公斤。发泡鞋材、注塑、薄膜。
扬子巴斯夫（中国）
V5110J，VA含量18%通用级，参考价约12.1元/公斤。透明级、注塑、挤出。
V4110J，VA含量14%发泡级，参考价约10-14元/公斤。发泡鞋材、注塑、薄膜。
台湾台塑（中国台湾）
7310M，VA含量6%发泡级，参考价约12元/公斤。发泡鞋材、注塑、薄膜。
7350M，VA含量18%通用级，参考价约13-17元/公斤。发泡、注塑、热熔胶。
7470M，VA含量26%热熔胶级，参考价约15-20元/公斤。热熔胶、光伏胶膜。
日本三井化学（Mitsui，日本）
EVAFLEX EVA260，VA含量28%热熔胶级，参考价约17元/公斤。热熔胶、光伏胶膜、高端应用。
EVAFLEX系列，通用级，参考价约14-22元/公斤。发泡、注塑、薄膜、热熔胶。
国产EVA（其他中企）
发泡级，参考价约8-14元/公斤。发泡鞋材、注塑、薄膜。
热熔胶级，参考价约12-18元/公斤。热熔胶、光伏胶膜。
光伏级，参考价约15-25元/公斤。光伏胶膜、高端应用。
一句话总结：国产发泡8-14块，国产热熔胶12-18块，国产光伏15-25块，进口通用12-22块，进口高端14-25块。你要的是啥VA含量和用途，决定了你该在哪一档选。
二、同是EVA，价差凭什么这么大
EVA的价格差，主要藏在四个地方。
第一，VA含量不同。VA含量6%左右便宜，含量28%以上柔韧性好但贵。VA含量越高，柔韧性和透明度越好，但耐热性越差。
第二，用途不同。发泡级便宜，热熔胶级适中，光伏级贵。光伏级需要超高纯度和特殊认证，价格更高。
第三，熔指不同。低熔指便宜，高熔指贵。高熔指需要特殊工艺，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多。同样是热熔胶级，日本三井比国产贵20-30%，贵的是品控和研发。
三、采购避坑：别让VA含量骗了你
我见过太多采购，比价比到最后选了最便宜的七块的，然后做出来的发泡鞋材弹性差、热熔胶粘不牢、客户退货，一次损失够买半年的好料。
EVA采购这行，水比你想的深。三个坑必须绕开：
第一，看VA含量和熔指不看牌号。同一个牌号不同批次性能可能波动，拿到料先测VA含量和熔指，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PE当EVA卖，拿低VA含量当高VA含量卖。要COA、要VA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7块，做出来发泡鞋材次品率5%；B料单价12块，次品率1%。算到每双鞋上，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VA又要高耐热、要光伏级又要低成本、要发泡级又要高弹性——那不是EVA的问题，是你需要的不是标准EVA，是改性EVA。
这时候可以看看宁波科隆新材目前在做的高性能改性EVA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EVA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，EVA行情一天一个样，乙烯、醋酸乙烯酯、汇率都在动。
如果你需要中石化、扬子巴斯夫、台湾台塑、日本三井、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EVA这事儿，七块的和二十五的，差的不是十八。
单价是门槛，选对VA含量和用途才是底线。别让报价单上的数字迷惑了你——你买的不是一公斤塑料，是一公斤能做出发泡鞋材或光伏胶膜的方案。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EVA采购上踩过什么坑？是VA含量不对还是粘不牢？评论区聊聊，点赞最高的三位，送一份EVA主流牌号选型对照表。
EVA和PE有什么区别
EVA VA含量怎么选
EVA和POE有什么区别
EVA改性料厂家怎么选
EVA发泡常见问题及解决
How much is EVA per kilogram?
Quotes range from CNY 7/kg to CNY 25/kg. EVA (ethylene-vinyl acetate copolymer) is not one material: foaming, injection, extrusion, hot-melt and photovoltaic grades each carry a different price. Comparing a foaming-grade quote with a photovoltaic one is not price comparison; it is how you get fooled.
EVA offers good flexibility, low-temperature resistance and chemical resistance, and is used in foamed shoe materials, hot-melt adhesives, photovoltaic encapsulant film, film and wire and cable.
1. Mainstream grade quotes (imported + domestic) — recent market references; live prices subject to same-day inquiry.
Sinopec (China)
18J3, VA 18%, general-purpose, approx. CNY 7.4-9/kg. Foaming, injection, film, general applications.
560, VA 14%, foaming grade, approx. CNY 8-12/kg. Foamed shoe materials, injection, film.
Yangzi BASF (China)
V5110J, VA 18%, general-purpose, approx. CNY 12.1/kg. Transparent grade; injection, extrusion.
V4110J, VA 14%, foaming grade, approx. CNY 10-14/kg. Foamed shoe materials, injection, film.
Formosa Plastics (Taiwan, China)
7310M, VA 6%, foaming grade, approx. CNY 12/kg. Foamed shoe materials, injection, film.
7350M, VA 18%, general-purpose, approx. CNY 13-17/kg. Foaming, injection, hot-melt adhesives.
7470M, VA 26%, hot-melt grade, approx. CNY 15-20/kg. Hot-melt adhesives, photovoltaic encapsulant film.
Mitsui Chemicals (Japan)
EVAFLEX EVA260, VA 28%, hot-melt grade, approx. CNY 17/kg. Hot-melt adhesives, photovoltaic film, premium applications.
EVAFLEX series, general-purpose, approx. CNY 14-22/kg. Foaming, injection, film, hot-melt adhesives.
Domestic EVA (other Chinese producers)
Foaming grade, approx. CNY 8-14/kg. Foamed shoe materials, injection, film.
Hot-melt grade, approx. CNY 12-18/kg. Hot-melt adhesives, photovoltaic film.
Photovoltaic grade, approx. CNY 15-25/kg. Photovoltaic encapsulant film, premium applications.
In short: domestic foaming CNY 8-14, domestic hot-melt CNY 12-18, domestic photovoltaic CNY 15-25, imported general-purpose CNY 12-22, imported premium CNY 14-25.
2. Why prices differ so much
Four factors: (1) VA content — around 6% is cheap; above 28% gives better flexibility and transparency but worse heat resistance, and costs more. (2) Application — foaming is cheap, hot-melt mid-range, photovoltaic expensive; photovoltaic grades need ultra-high purity and special certification. (3) Melt flow index — high MFI needs special processing and costs more. (4) Brand and origin — for the same hot-melt grade, Mitsui costs 20-30% more than domestic, paying for quality control and R&D.
3. Procurement pitfalls
The cheapest material often gives poor foam elasticity or weak hot-melt bonding, causing returns. Three traps to avoid:
First, test VA content and melt flow index against the COA instead of trusting the grade name. Second, watch for substitution: some traders sell PE as EVA or low-VA as high-VA; demand the COA, a VA-content test and original packaging. Third, calculate total cost per pair of shoes: A at CNY 7/kg with a 5% defect rate vs. B at CNY 12/kg with 1% — B is cheaper.
4. Standard grades not enough? Consider modified compounds
If you need high VA AND high heat resistance, photovoltaic grade AND low cost — you need modified EVA. Ningbo Kolong New Materials is developing high-performance modified EVA grades covering glass-fiber reinforcement, flame retardancy, weatherability and conductivity. Message us for a modified EVA quote reference.
In plain terms: standard grades are a big pot of shared rice; modified compounds are a dish cooked to order.
5. Same-day quotes via message
EVA prices change daily — ethylene, vinyl acetate and exchange rates all move. Message us for same-day quotes on specific grades from Sinopec, Yangzi BASF, Formosa, Mitsui or domestic producers; real numbers.
Final words
The gap between CNY 7 and CNY 25 is not CNY 18. Unit price is the threshold; choosing the right VA content and application is the baseline. You are buying a solution for making foamed shoe material or photovoltaic film. Do the math per finished part, add rejected-goods loss, and you will know who is truly cheap.
What pitfalls have you hit buying EVA — wrong VA content or weak bonding? The three most-liked comments will receive an EVA grade selection guide.
