LDPE多少钱一公斤?
这个问题一搜,从九块三一公斤到二十三块一公斤,报价差得比密度还多。有人说我买的九块三的兰州石化2426H用得挺好,有人说我买的二十三的陶氏DFDB-6005才叫高端。到底差在哪?
说实话,问LDPE多少钱一公斤的人,大概率还没搞懂LDPE这东西不是一个料——薄膜级、注塑级、涂覆级、电缆料、高透明级,每个分支价格都不一样。你拿通用薄膜的价和电缆料比,那不叫比价,叫被忽悠。
LDPE就是低密度聚乙烯,高压法生产,柔软、透明、耐低温,常用于薄膜、包装袋、涂层、电缆绝缘。
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。
陶氏(Dow,美国)
722,通用注塑级,参考价约15元/公斤。日用品、注塑制品。
4203,通用级,参考价约15元/公斤。薄膜、注塑。
DFDB-6005,电缆料级,参考价约23元/公斤。电缆绝缘、高端应用。
PG 7004,包装应用级,参考价约13-16元/公斤。包装薄膜、涂层。
埃克森美孚(ExxonMobil,美国)
LD 150BW,薄膜级购物袋冷冻膜,参考价约9.3元/公斤。通用薄膜、包装。
2022.AC(100AC),薄膜级,参考价约11.4元/公斤。通用薄膜、包装。
LD-402,注塑级,参考价约12-15元/公斤。日用品、注塑。
LG化学(韩国)
MB9500,注塑级,参考价约13.7元/公斤。日用品、注塑。
MB9400,注塑级,参考价约12-14元/公斤。通用注塑。
中石化/中石油(中企大厂)
兰州石化2426H,吹塑透明薄膜级,参考价约9.3元/公斤。包装薄膜、通用膜。
茂名石化2426K,薄膜级,参考价约11.37元/公斤。通用薄膜、包装。
茂名石化951-050,薄膜级,参考价约11.5元/公斤。通用薄膜。
燕山石化LD605/LD608,通用级,参考价约10-12元/公斤。通用注塑、薄膜。
上海石化LF2700/N220,薄膜级,参考价约10-13元/公斤。薄膜、涂层。
一句话总结:通用薄膜9-12块,注塑/涂覆12-15块,电缆料/高端15-23块。你要的是啥密度和用途,决定了你该在哪一档选。
二、同是LDPE,价差凭什么这么大
LDPE的价格差,主要藏在四个地方。
第一,密度不同。密度0.91-0.92是常规LDPE,密度0.92以上是高密度级价格略高。密度越低,越柔软,透明度越好。
第二,熔指不同。低熔指适合吹膜价格适中,高熔指适合注塑和涂覆价格略高。熔指决定加工方式。
第三,用途不同。通用薄膜便宜,注塑/涂覆适中,电缆料/医疗级贵。特殊用途需要特殊配方和认证。
第四,品牌和产地。进口溢价高但批次稳定,国产性价比高但质量参差。同样是薄膜级,陶氏比中石化贵30-50%,贵的是品控和研发。
三、采购避坑:别让密度骗了你
我见过太多采购,比价比到最后选了最便宜的九块三的,然后做出来的薄膜强度不够、雾度高、客户退货,一次损失够买半年的好料。
LDPE采购这行,水比你想的深。三个坑必须绕开:
第一,看熔指和密度不看牌号。同一个牌号不同批次性能可能波动,拿到料先测熔指和密度,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LLDPE当LDPE卖,拿回收料当新料卖。要COA、要密度检测、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9.3块,做出来薄膜次品率5%;B料单价12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——比如要阻燃又要高透明、要增强又要耐低温、要低成本又要食品级——那不是LDPE的问题,是你需要的不是标准LDPE,是改性LDPE。
这时候可以看看宁波科隆新材目前在做的高性能改性LDPE方案,玻纤增强、阻燃、抗静电、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LDPE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,LDPE行情一天一个样,乙烯、高压法成本、汇率都在动。
如果你需要陶氏、埃克森美孚、LG、中石化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LDPE这事儿,九块三的和二十三的,差的不是十三块七。
单价是门槛,选对密度和用途才是底线。别让报价单上的数字迷惑了你——你买的不是一公斤塑料,是一公斤能做出合格薄膜的方案。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LDPE采购上踩过什么坑?是薄膜强度不够还是雾度高?评论区聊聊,点赞最高的三位,送一份LDPE主流牌号选型对照表。
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LDPE吹膜常见问题及解决
How much is LDPE per kilogram?
Quotes range from CNY 9.3/kg to CNY 23/kg. LDPE (low-density polyethylene), made by the high-pressure process, is not one material: film, injection, coating, cable and high-transparency grades each carry a different price. Comparing a general film quote with a cable grade is not price comparison; it is how you get fooled.
LDPE is soft, transparent and low-temperature-resistant, and is used in film, bags, coatings and cable insulation.
1. Mainstream grade quotes (imported + domestic) — recent market references; live prices subject to same-day inquiry.
Dow (USA)
722, general injection grade, approx. CNY 15/kg. Daily products, injection parts.
4203, general-purpose, approx. CNY 15/kg. Film, injection.
DFDB-6005, cable grade, approx. CNY 23/kg. Cable insulation, premium applications.
PG 7004, packaging grade, approx. CNY 13-16/kg. Packaging film, coatings.
ExxonMobil (USA)
LD 150BW, film grade, shopping bags, freezer film, approx. CNY 9.3/kg. General film, packaging.
2022.AC (100AC), film grade, approx. CNY 11.4/kg. General film, packaging.
LD-402, injection grade, approx. CNY 12-15/kg. Daily products, injection.
LG Chem (South Korea)
MB9500, injection grade, approx. CNY 13.7/kg. Daily products, injection.
MB9400, injection grade, approx. CNY 12-14/kg. General injection.
Sinopec/PetroChina (Chinese majors)
Lanzhou 2426H, blown transparent film grade, approx. CNY 9.3/kg. Packaging film, general film.
Maoming 2426K, film grade, approx. CNY 11.37/kg. General film, packaging.
Maoming 951-050, film grade, approx. CNY 11.5/kg. General film.
Yanshan LD605/LD608, general-purpose, approx. CNY 10-12/kg. General injection, film.
Shanghai LF2700/N220, film grade, approx. CNY 10-13/kg. Film, coatings.
In short: general film CNY 9-12, injection/coating CNY 12-15, cable/premium CNY 15-23.
2. Why prices differ so much
Four factors: (1) Density — 0.91-0.92 is standard; lower density means softer and more transparent. (2) Melt flow index — low MFI suits blown film at mid-price; high MFI suits injection and coating at a slightly higher price. (3) Application — general film is cheap; cable/medical grades need special formulations and certification. (4) Brand and origin — for the same film grade, Dow costs 30-50% more than Sinopec, paying for quality control and R&D.
3. Procurement pitfalls
The cheapest material often gives weak film or high haze, causing returns. Three traps to avoid:
First, test MFI and density against the COA instead of trusting the grade name. Second, watch for substitution: some traders sell LLDPE as LDPE or recycled as virgin; demand the COA, a density test and original packaging. Third, calculate total cost: A at CNY 9.3/kg with a 5% defect rate vs. B at CNY 12/kg with 1% — B is cheaper per part.
4. Standard grades not enough? Consider modified compounds
If you need flame retardancy AND high transparency, reinforcement AND low-temperature resistance — you need modified LDPE. Ningbo Kolong New Materials is developing high-performance modified LDPE grades covering GF reinforcement, flame retardancy, antistatic and conductivity. Message us for a modified LDPE 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
LDPE prices change daily — ethylene, high-pressure process costs and exchange rates all move. Message us for same-day quotes on specific grades from Dow, ExxonMobil, LG or Sinopec; real numbers.
Final words
The gap between CNY 9.3 and CNY 23 is not CNY 13.7. Unit price is the threshold; choosing the right density and application is the baseline. Do the math per part, add rejected-goods loss, and you will know who is truly cheap.
What pitfalls have you hit buying LDPE — weak film or high haze? The three most-liked comments will receive an LDPE grade selection guide.