电子厂洁净车间里，一批IC托盘在封装工序中静电放电，打穿了数十颗芯片，损失六位数。品质经理连夜排查，发现托盘用的是普通PP，表面电阻10的16次方欧姆，静电根本导不出去——等于在芯片旁边放了个定时炸弹。
脱个毛衣噼里啪啦，塑料膜一扯就吸手指——静电这事儿，人人都被它电过，只是没人把它当回事。
本文由长期经营塑料原料及助剂的宁波市科隆新材料有限公司整理，牌号与批次信息以实际供货渠道为准。
抗静电剂速查总表：内加、外用、永久导电三条线
抗静电剂不是一种东西，而是三条路线：一条靠自己迁移到表面吸水，一条靠事后喷涂救急，一条干脆把导电填料织进塑料里。选哪条，取决于你要多低的电阻、能接受什么颜色、以及用多久。下面这张表把主流体系一页列清。
| 体系 | 代表品种 | 关键参数 | 典型制品 | 添加比例 |
|---|
| 内加迁移型 | 乙氧基胺、GMS甘油单酯、山梨醇酐酯 | 亲水亲油双端，靠吸湿迁移，依赖环境湿度 | 包装膜、周转箱、家电外壳 | 0.5%-2% |
| 外用涂布型 | 季铵盐类、乙氧基化胺涂液 | 喷涂擦拭即见效，短期有效 | 已成型件、现场应急 | 涂液0.1%-0.5% |
| 永久导电型 | 导电炭黑、碳纳米管、碳纤维 | 形成连续导电网络，不依赖湿度 | IC托盘、导电周转箱、防爆管 | 炭黑10%-20% |
| 本征导电涂层 | 聚噻吩类导电聚合物 | 可涂布、相对透明，电阻稳定 | 透明防静电包装、显示屏 | 涂布级 |
注：以上表面电阻为参考区间，实际效果受环境湿度影响，以官方TDS和实测为准。选型先定电阻目标和使用湿度，再谈路线，别反过来。
图1 抗静电剂——塑料表面的导电水膜与导电网路
内加外用两条路，选错了冬天就翻车
这位主角，专门对付看不见的静电。宁波市科隆新材料有限公司长期经营各类塑料助剂及改性原料，覆盖国内外多个品牌货源，在抗静电剂、着色剂、阻燃剂等常用助剂品类上有稳定供货渠道。而抗静电剂这个品类，本质上就是塑料的“去静电贴”——塑料分子链里没有自由电子，摩擦产生的电荷泄放不出去，就堆在表面；抗静电剂的任务，是给这些电荷修一条能走的路。
塑料表面那层看不见的水膜，才是静电真正的泄洪道——电阻能跨七个数量级，靠的从来不是玄学。
主流机理分两大类。一类是迁移型：抗静电剂分子一头亲水、一头亲油，亲油端扎进塑料内部，亲水端慢慢迁移到表面，吸附空气中的水分形成一层极薄的导电水膜，电荷顺着水膜泄放。另一类是导电型：直接往塑料里加炭黑、碳纳米管这类导电填料，它们在树脂里搭成连续通路，电子有路可走，电荷自然堆不起来。
内加型抗静电剂像定时出门的快递员，慢慢迁移到表面上岗；外用型像临时贴的创可贴，应急管用但不持久。
迁移型的软肋也很明显：它靠吸水工作，一旦环境湿度低于40%，水膜变薄甚至断掉，抗静电效果就打折；而且它会被摩擦、清洗、老化持续消耗，得靠内部不断迁移来补充，所以是“长效但非永久”。导电型则不太看湿度脸色，黑色件、高导电要求的场合非它莫属，代价是颜色发黑、填料量大、成本上去一截。
抗静电剂的悲哀：它一辈子都在往外跑，跑出去才有用，跑不出去就是一团粉。
逐品种速查：乙氧基胺通用，季铵盐救急，炭黑管永久
牌号看着多，抓住几个主力就能盖住八成应用。下面逐个讲定位、适用信号和注意事项。
做抗静电配方，别只盯着加了多少份，要盯着冬天干燥车间里那层水膜还在不在。
乙氧基胺类：内加迁移型的主力品种，与PP、PE、ABS相容性较好，迁移速度适中，表面电阻稳定在10的9到11次方区间，是通用包装膜、周转箱、家电外壳的常用选择。选它的信号：制品不透明或半透明、接受0.5%-2%添加量、使用环境有一定湿度。注意：它耐热一般，加工温度别长时间冲到260℃以上，否则容易分解。
供货提示：乙氧基胺内加型和季铵盐外用型抗静电剂科隆新材均有货源，炭黑导电母粒也可配套，每批附表面电阻数据，公斤级试样支持先测后用。
GMS甘油单硬脂酸酯、山梨醇酐酯类：非离子型迁移抗静电剂，毒性低、食品接触友好，常用于食品包装膜和薄膜制品。选它的信号：做食品接触包装、要求低析出、对成本敏感。注意：抗静电效果偏弱，单用只能到10的10到12次方，高要求场合要复配乙氧基胺。
季铵盐类外用涂液：配成水溶液或醇溶液，喷涂、擦拭到已成型制品表面，干燥后形成抗静电层，几小时内就能把表面电阻压下来。选它的信号：已成型件现场救急、临时防静电、不想改配方。注意：不耐摩擦和水洗，通常几周至几个月就衰减，属于“治标”。
炭黑在塑料里织成一张黑色的网，电子顺着网跑，静电无处堆积——这是用颜色换电导。
导电炭黑、碳纳米管、碳纤维：走永久导电路线。导电炭黑添加量通常10%-20%，成本可控，是IC托盘、导电周转箱、矿山输送管的主力；碳纳米管添加量低（母粒2%-5%即可）、可做薄件和浅色一点的导电件，但价格高、分散要求高。选它的信号：要求长期稳定导电、使用季节湿度波动大、接受深色。注意：炭黑会吸光着色、影响光泽，碳管要解决分散和粉尘防护。
做透明件就别选炭黑，做黑色件就别浪费钱上透明抗静电剂。
替代对照：进口抗静电体系能不能换？先看这张表
采购问得最多的还是那句：进口抗静电体系能不能用国产替代？可以，但抗静电剂的差异往往不在“能不能降电阻”，而在批次稳定性和迁移周期的一致性上。下面这张表列常见替代方向和切换前提。
| 原用进口方向 | 典型应用 | 可对标方案 | 切换前提 |
|---|
| 进口内加型乙氧基胺 | 包装膜/周转箱 | 国产乙氧基胺类 | 对比表面电阻随湿度曲线、迁移稳定周期、喷霜 |
| 进口外用季铵盐 | 现场涂布救急 | 国产季铵盐涂液 | 对比干湿环境电阻、擦拭保持时间、附着力 |
| 进口导电炭黑 | IC托盘/导电件 | 国产导电炭黑 | 对比体积电阻率、分散性、着色力波动 |
| 进口碳纳米管母粒 | 超薄导电膜 | 国产碳管母粒 | 对比添加量、透光率、电阻批次稳定性 |
表中所列只是方向参考，实际电阻曲线和批次稳定性仍要以平行测试为准。
抗静电剂替代要看表面电阻和持久性，科隆新材寄送公斤级试样时附表面电阻率参考数据，客户可以直接做高低湿环境下的电阻对比，验证通过再切换。
加了抗静电剂还吸灰？先看车间湿度是不是低于40%，吸湿型选手在干燥环境里直接罢工。
行业场景速查：电子厂和矿山要的根本不是一回事
同样叫抗静电，做电子IC托盘和做食品防尘膜，要求差着十万八千里。下面这张表按行业拆开。
| 行业 | 典型制品 | 客户最先问的参数 | 推荐体系 | 认证要求 |
|---|
| 电子电器 | IC托盘、周转箱、屏蔽包装袋 | 表面电阻10^8-10^11、静电衰减时间 | 导电炭黑/碳管永久型 | ESD S20.20、RoHS |
| 包装 | 防尘膜、食品包装内衬 | 透明度、低添加、不影响印刷 | 内加迁移型乙氧基胺 | FDA、GB 4806 |
| 矿山/防爆 | 输送管、风机叶轮、防静电地板 | 表面电阻<10^6、长期稳定 | 炭黑导电体系 | GB 3836、矿用认证 |
| 家电 | 吸尘风道、外壳、复印部件 | 抗吸尘、不影响外观颜色 | 内加型迁移体系 | RoHS、REACH |
| 纺织化纤 | 纺丝组件、地毯、无纺布 | 纺丝不飘丝、抗静电持久 | 纺丝级内加型 | OEKO-TEX |
举个具体场景：做电子周转箱，客户要求表面电阻10的8到11次方，且冬天干燥车间复测仍要达标。这种情况下单用内加迁移型风险大——低湿季节水膜断了电阻就飙；稳妥做法是直接上导电炭黑永久体系，电阻不受湿度影响，代价是做黑色。
电子车间怕的不是被电一下，是静电悄悄打穿芯片——看不见的损伤才是真贵。
添加量与搭配要点：三条配方底线
抗静电剂的添加量看着随意，其实有规律。下面三条配方是行业里验证过的通用方案。
防静电包装要10的8到11次方，IC托盘就选永久导电炭黑体系，别用迁移型赌低湿季节。
◆ 内加迁移型：乙氧基胺0.5%-2%，PP/PE通用包装与家电件；与润滑剂、爽滑剂注意“抢表面”，外润滑总量别压过抗静电剂。
◆ 永久导电型：导电炭黑10%-20%或碳纳米管母粒2%-5%，接受深色、做厚壁导电件；炭黑要做分散和冲击补偿。
◆ 外用涂布：季铵盐涂液0.1%-0.5%浓度，喷涂后静置干燥，适合已成型件应急，别指望它替内加。
搭配要点还有三条：一是内加型和润滑剂会竞争表面迁移位，外润滑过量会把抗静电剂按在内部出不来；二是外用涂布后若还要印刷或粘接，先做附着力和电晕测试；三是导电炭黑会降低表面光泽、增加密度，设计壁厚和配色时要预留余量。
静电：吸湿靠迁移，永久靠导电。
加工与合规红线：这三个坑会让抗静电白加
抗静电剂用不好，常常不是料不行，而是加工环节把它浪费了。下面这张表把关键参数和做错的后果列出来。
| 环节 | 参考值 | 做错的后果 |
|---|
| 预混分散 | 高速混合3-5min，导电炭黑/碳管需充分分散 | 分散不均→电阻局部超标、批次波动大 |
| 加工温度 | 迁移型耐热一般<230℃，避免长时间高剪切 | 温度过高/剪切过强→抗静电剂分解或提前消耗 |
| 与润滑协同 | 外润滑剂与抗静电剂竞争表面位，总量受控 | 润滑剂过量→抗静电剂出不来、表面电阻降不下来 |
| 电阻测试 | 成品在23℃/50%RH平衡后再测 | 未平衡就测→数据失真、误判配方 |
出口欧盟要核对REACH和RoHS清单，对应表面电阻检测报告随货归档。
你的制品要扛三个月的静电，还是三年？想清楚这个，内加迁移和永久导电就不用再纠结。
FAQ：采购和配方工程师最常问的五个问题
Q1：国产抗静电剂能不能替代进口料？
可以，但要分路线。内加迁移型（乙氧基胺体系）国产和进口差距已经很小，批次稳定的国产品牌做通用包装、家电件完全够用；外用季铵盐涂液国产选择也多。但在永久导电体系（高端导电炭黑、碳纳米管母粒）和低电阻一致性要求高的电子导电件上，进口在批次稳定性和分散性上仍有优势。替代的正确做法是先拿公斤级样品做表面电阻-湿度曲线平行测试，重点验证低湿条件和老化后的保持率，通过后再小批量放量。需要对照样品的，可以按公斤级索取，附批次数据一并比对。
Q2：为什么新做的件抗静电很好，放一个月就不行了？
迁移型抗静电剂需要时间“爬到”表面，新件刚脱模时效果可能还没起来，放几天到几周反而更好；但反过来，如果存放环境太干燥或表面被油污染、被反复擦拭，迁移层会被消耗而补不上来。解决办法是控制存放湿度、避免表面污染，必要时适当提高初始添加量。
Q3：低湿度环境（低于40%RH）该选哪种？
低湿环境下吸湿型迁移抗静电剂效果会明显衰减，这时别再指望加水膜，直接上导电型——导电炭黑或碳纳米管永久体系，电阻不依赖水分。如果成本敏感且接受黑色，导电炭黑是稳妥选择。
Q4：炭黑导电件还能不能做浅色或透明？
导电炭黑本身是黑色的，做不了浅色和透明。要浅色导电可以考虑碳纳米管母粒（添加量低、颜色浅一些）或本征导电聚合物涂层，但成本和工艺要求都更高；透明防静电目前更多走涂层路线，而非本体加炭黑。
Q5：外用喷涂和内加哪个更划算？
看场景。批量新件、要长期稳定，内加型一次解决，单公斤成本低；已成型件现场应急、批量小、要求短期，外用喷涂省改模和改配方的成本。别长期靠喷涂续命——人工和耗材累积下来并不便宜，且一致性难稳定。
选型三步清单：照着选不走弯路
◆ 第1步·定电阻目标：先明确要“防尘抗静电”（10的9到11次方）还是“导电泄放”（低于10的6次方），以及使用季节的湿度范围和寿命要求。
◆ 第2步·选路线：透明浅色短期用→内加迁移型；黑色高导电长期用→炭黑/碳管永久型；已成型件应急→外用涂布。
◆ 第3步·核认证与相容性：确认ESD、食品接触、矿用等认证，检查与润滑剂、阻燃剂、印刷粘接的相容性，先小试做电阻-湿度曲线平行测试再放量。
静电看不见，损失算得清
抗静电剂分迁移型（内加/外用）和永久型（炭黑/碳管/导电聚合物），选型取决于制品对电阻值和持久性的要求。科隆新材可提供不同体系的表面电阻参考数据和低VOC合规文件；电子包装和洁净车间场景推荐永久导电体系，公斤级试样支持先做表面电阻和静电衰减测试。
去年，一家做IC托盘的厂被客户投诉静电击穿芯片，赔了一大笔。科隆新材给他们推荐了炭黑导电母粒体系，添加量约20%，表面电阻控制在10的6到8次方欧姆。寄了公斤级样品后，客户做了静电衰减测试，从原来的大于30秒降到0.5秒以内。重新投产后没再出现静电击穿事故，客户的芯片厂订单从一家扩到了三家。
表面电阻测过吗？是10的几次方？
声明：本文涉及的品牌、商标及产品名称权归各自原厂所有。本文为第三方选材知识分享，文中提及的牌号、参数、价格、认证及应用案例仅供参考，具体以各生产企业官方最新资料及批次检测报告为准。本文不构成任何采购或投资建议，读者据此操作风险自担。
In the cleanroom of the electronics factory, a batch of IC trays discharged static electricity during the packaging process, destroying dozens of chips and causing six-figure losses. The quality manager investigated overnight and found that the trays were made of ordinary PP, with a surface resistance of 10^16 ohms, making it impossible for static electricity to dissipate—essentially placing a time bomb next to the chips.
Taking off a sweater makes crackling sounds, and pulling a plastic wrap sticks to your fingers—everyone has been shocked by static electricity, it's just that no one takes it seriously.
This article is compiled by Ningbo Kolong New Materials Co., Ltd., which has long been engaged in the business of plastic raw materials and additives. The grade and batch information are subject to the actual supply channels.
Quick Reference Table of Antistatic Agents: Internal Addition, External Use, Permanent Conductive Three Lines
Anti-static agents are not a single thing, but three approaches: one relies on migrating to the surface to absorb moisture on its own, one relies on spraying afterwards for emergency use, and one simply weaves conductive fillers into the plastic. Which one to choose depends on how low you want the resistance to be, what colors you can accept, and how long you plan to use it. The table below lists the mainstream systems on one page.
| system | Representative variety | Key parameters | Typical products | Add ratio |
|---|
| Internal and migratory type | Ethoxyamine, GMS (glycerol monostearate), sorbitan esters | Amphiphilic at both ends, relies on moisture absorption and migration, depends on environmental humidity | Packaging film, turnover boxes, home appliance shells | 0.5%-2% |
| For external use, topical type | Quaternary ammonium salts, ethoxylated amine coating | Spray and wipe for immediate effect, effective in the short term | Prefabricated parts, on-site emergency | Coating solution 0.1%-0.5% |
| Permanent conductive type | Conductive carbon black, carbon nanotubes, carbon fibers | Form a continuous conductive network, not dependent on humidity | IC trays, conductive turnover boxes, explosion-proof tubes | Carbon black 10%-20% |
| Intrinsic conductive coating | Polythiophene conductive polymers | Can be coated, relatively transparent, with stable resistance | Transparent anti-static packaging, display screen | Coating grade |
Note: The above surface resistance values are reference ranges. The actual effect is influenced by environmental humidity and should be based on the official TDS and actual measurements. When selecting a model, first determine the resistance target and operating humidity, then discuss the approach—do not do it the other way around.
Figure 1 Antistatic Agent — Conductive Water Film and Conductive Network on Plastic Surface
There are two ways: internal and external; if you choose the wrong one, you’ll fail in winter.
This protagonist specializes in dealing with invisible static electricity. Ningbo Cologne New Materials Co., Ltd. has long been engaged in the business of various plastic additives and modified raw materials, covering supply sources of multiple domestic and international brands. It has stable supply channels in commonly used additive categories such as antistatic agents, colorants, and flame retardants. As for the antistatic agent category, its essence is essentially the 'anti-static sticker' for plastics—plastic molecular chains lack free electrons, so the charges generated by friction cannot be released and accumulate on the surface. The task of an antistatic agent is to build a path for these charges to move.
The invisible water film on the surface of plastic is the real channel for static electricity to drain — the ability of resistance to span seven orders of magnitude has never relied on mysticism.
The mainstream mechanisms are divided into two categories. One type is the migratory type: antistatic agent molecules are hydrophilic at one end and lipophilic at the other. The lipophilic end embeds into the plastic, while the hydrophilic end slowly migrates to the surface, adsorbing moisture from the air to form a very thin conductive water film, allowing charge to dissipate along the water film. The other type is the conductive type: conductive fillers such as carbon black or carbon nanotubes are directly added into the plastic, forming continuous pathways within the resin, providing routes for electrons, so charges naturally cannot accumulate.
Internal antistatic agents are like couriers who leave on a schedule, gradually migrating to the surface to take effect; external ones are like temporary band-aids, useful in emergencies but not lasting.
The weak point of the migratory type is also obvious: it relies on water absorption, and once the humidity drops below 40%, the water film becomes thinner or even breaks, reducing its anti-static effect; Moreover, it is continuously consumed by friction, cleaning, and aging, so it must be replenished by internal migration, so it is "long-lasting but not permanent." The conductive type is less sensitive to humidity and conditions; it is the only choice for black parts and high conductivity requirements, but the trade-off is blacker color, larger filler content, and higher costs.
The sadness of antistatic agents: they spend their whole life running outwards; they are only useful when they run out, and if they can't get out, they are just a lump of powder.
Quick reference by type: Ethoxyamine is general-purpose, quaternary ammonium salts for emergency, carbon black tubes for permanent
There seem to be many grades, but by focusing on a few main ones, you can cover 80% of the applications. Below, we will go through the positioning, applicable signals, and precautions one by one.
When making anti-static formulas, don't just focus on how many parts are added; pay attention to whether the layer of water in the dry workshop in winter is still there.
Ethoxylated amines: A main product of the internal migration type, compatible with PP, PE, and ABS, with moderate migration speed and surface resistivity stable in the 10^9 to 10^11 range. They are commonly chosen for general packaging films, turnover boxes, and household appliance housings. Signals for selecting it: the product is opaque or semi-transparent, accepts 0.5%-2% addition, and is used in an environment with some humidity. Note: Its heat resistance is average, so processing temperature should not be maintained above 260°C for long periods, otherwise it may decompose.
Supply Notice: Cologne New Materials has stock of ethoxyamine internal type and quaternary ammonium salt external type antistatic agents. Carbon black conductive masterbatch can also be supplied. Surface resistance data is provided with each batch, and kilogram-level samples are available for testing before use.
GMS glycerol monostearate, sorbitan esters: non-ionic migration antistatic agents, low toxicity, food-contact friendly, commonly used in food packaging films and thin film products. Signals for choosing it: for food-contact packaging, requiring low migration, cost-sensitive. Note: the antistatic effect is relatively weak; used alone, it can only reach 10^10 to 10^12 times, high-demand situations require blending with ethoxylated amines.
Quaternary ammonium salt topical solution: Prepared as an aqueous or alcohol solution, it can be sprayed or wiped onto the surface of a finished product. After drying, it forms an antistatic layer that can reduce surface resistance within a few hours. Reasons to choose it: emergency on-site treatment for finished parts, temporary antistatic measure, do not want to change the formula. Note: Not resistant to friction and washing, usually degrades in a few weeks to a few months, considered a "temporary solution."
Carbon black weaves a black network inside the plastic, allowing electrons to move along the network so that static electricity has nowhere to accumulate—this is using color to achieve conductivity.
Conductive carbon black, carbon nanotubes, carbon fibers: pursue permanent conductivity. The typical addition of conductive carbon black is 10%-20%, cost is controllable, and it is the main choice for IC trays, conductive turnover boxes, and mining conveyor pipes; carbon nanotubes require a low addition (2%-5% masterbatch is sufficient), suitable for thin parts and slightly lighter-colored conductive parts, but they are expensive and require high dispersion. The signal for choosing them: requires long-term stable conductivity, experiences large seasonal humidity fluctuations, and accepts dark colors. Note: carbon black absorbs light and colors, affecting gloss, while carbon nanotubes require addressing dispersion and dust protection.
Don't choose carbon black for transparent parts, and don't waste money on transparent antistatic agents for black parts.
Alternative Comparison: Can the imported anti-static system be replaced? Let's first look at this table.
The most frequently asked question in procurement is still this: Can imported antistatic systems be replaced with domestic ones? Yes, but the differences in antistatic agents often lie not in 'whether the resistivity can be reduced,' but in batch stability and consistency of migration cycles. The table below lists common replacement directions and the prerequisites for switching.
| Original Import Direction | Typical Applications | Benchmark solution | Switch premise |
|---|
| Imported internal-added ethoxyamine | Packaging film / turnover box | Domestic ethoxylamine | Comparison of surface resistance versus humidity curve, migration stability period, and frosting |
| Imported topical quaternary ammonium salts | On-site emergency coating | Domestic quaternary ammonium salt coating solution | Comparison of resistance in dry and wet environments, wipe retention time, and adhesion |
| Imported conductive carbon black | IC Tray / Conductive Parts | Domestic conductive carbon black | Compare volume resistivity, dispersibility, and color strength fluctuations |
| Imported carbon nanotube masterbatch | Ultrathin conductive film | Domestic carbon tube masterbatch | Comparison of added amount, light transmittance, and batch stability of resistance |
The table only provides directional reference; the actual resistor curve and batch stability should still be based on parallel testing.
The replacement of antistatic agents depends on surface resistance and durability. When Cologne New Materials sends kilogram-scale samples, they include reference data for surface resistivity, allowing customers to directly compare resistance under high and low humidity conditions and switch only after verification.
Still attracting dust even with an antistatic agent? First, check if the workshop humidity is below 40%. Hygroscopic materials will stop working in a dry environment.
Quick industry check: What electronic factories and mines need is fundamentally not the same thing.
Although both are called anti-static, the requirements for making electronic IC trays and making dust-proof food films are vastly different. The table below separates them by industry.
| Industry | Typical products | The parameters the customer asked about first | Recommendation system | Certification requirements |
|---|
| Electronics and electrical appliances | IC trays, turnover boxes, shielded packaging bags | Surface resistance 10^8-10^11, static decay time | Conductive carbon black/carbon tube permanent type | ESD S20.20, RoHS |
| Packaging | Dust-proof film, food packaging liner | Transparency, low additives, does not affect printing | N-alkyl migratory ethoxyamine | FDA, GB 4806 |
| Mine/Explosion-Proof | Conveying pipe, fan impeller, anti-static floor | Surface resistance < 10^6, long-term stability | Carbon Black Conductive System | GB 3836, Mining Certification |
| Home appliances | Vacuum air duct, casing, copier components | Dust-resistant, does not affect the appearance color | Endogenous Migration System | RoHS, REACH |
| Textile and chemical fiber | Spinning components, carpets, non-woven fabrics | Spinning without floating fibers, long-lasting anti-static | Spinning-grade internal additive type | OEKO-TEX |
For a specific scenario: making electronic turnover boxes, the customer requires a surface resistance of 10^8 to 10^11 ohms, and the product must still meet the standard when re-tested in the dry workshop during winter. In this case, relying solely on internally added migration-type conductive agents is risky — in the low humidity season, if the water film breaks, the resistance will skyrocket. The safer approach is to use a permanent conductive carbon black system directly; the resistance will not be affected by humidity, but the trade-off is that it will be black.
What electronic workshops fear is not getting an electric shock, but static electricity quietly piercing the chip—the invisible damage is what really costs.
Dosage and Key Points of Combination: Three Formula Bottom Lines
The amount of antistatic agent added may look casual, but it actually follows a pattern. The following three formulas are industry-verified general solutions.
Anti-static packaging requires 10 to the power of 8 to 11, and for IC trays, choose a permanently conductive carbon black system. Do not use a migratory type in low humidity seasons.
◆ Internal migration type: ethoxylamine 0.5%-2%, PP/PE universal packaging and home appliance parts; When using lubricants and lubricating agents, pay attention to "surface protection," and do not exceed the total amount of external lubricating agent over antistatic agents.
◆ Permanent conductive type: 10%-20% conductive carbon black or 2%-5% carbon nanotube masterbatch, suitable for dark colors and making thick-walled conductive parts; the carbon black needs to be dispersed and impact compensated.
◆ External application: Quaternary ammonium salt solution at a concentration of 0.1%-0.5%, spray and let it dry, suitable for emergency use on finished products, don’t expect it to replace internal addition.
There are three more key points for formulation: First, internal additives and lubricants will compete for surface migration sites, and excessive external lubrication can trap antistatic agents inside, preventing them from coming out; second, if printing or bonding is required after external coating, adhesion and corona tests should be conducted first; third, conductive carbon black will reduce surface gloss and increase density, so allowances should be made when designing wall thickness and color matching.
Static electricity: Moisture absorption relies on migration, permanence relies on conductivity.
Processing and Compliance Red Lines: These Three Pitfalls Will Cause Increased Antistatic Issues
If antistatic agents are not used properly, it is often not because the material is bad, but because the processing stage wastes it. The table below lists the key parameters and the consequences of doing it wrong.
| link; segment; part | Reference value | The consequences of doing wrong |
|---|
| pre-mixed dispersion | High-speed mixing for 3-5 minutes, conductive carbon black/carbon nanotubes need to be fully dispersed | Uneven dispersion → local resistance exceeds the standard, large batch-to-batch variation |
| Processing temperature | Migration-type heat resistance is generally <230℃, avoid prolonged high shear | Excessive temperature/too strong shearing → antistatic agent decomposes or is prematurely consumed |
| Synergistic with lubrication | External lubricants compete with antistatic agents for surface sites, and the total amount is controlled | Excess lubricant → antistatic agent can't come out, surface resistance can't decrease |
| Resistance Test | Test the finished product after balancing at 23℃/50% RH | If not balanced, measurement → data distortion, misjudgment of the formula |
Exports to the EU need to verify the REACH and RoHS lists, and the corresponding surface resistance test reports should be filed with the goods.
Do your products need to withstand three months of static electricity, or three years? Think this through, and then you won't have to worry about adding migration and permanent conductivity.
FAQ: The Five Most Common Questions Asked by Purchasing and Formulation Engineers
Q1: Can domestically-produced antistatic agents replace imported materials?
It is possible, but it needs to be divided by type. For internal migration-type (ethoxyamine system), the gap between domestic and imported products is already very small. Domestic brands with stable batches are perfectly sufficient for general packaging and household appliance components. For external quaternary ammonium salt coatings, there are also many domestic options. However, for permanent conductive systems (high-end conductive carbon black, carbon nanotube masterbatches) and electronic conductive components that require high consistency of low resistance, imported products still have advantages in batch stability and dispersibility. The correct approach for replacement is to first test kilogram-level samples for surface resistance-humidity curve in parallel, focusing on verifying retention under low humidity conditions and after aging, and only after passing these tests can small-scale production be increased. If reference samples are needed, they can be requested at the kilogram level, with batch data provided for comparison.
Q2: Why does a newly made part have good anti-static properties, but they don't last after a month?
Migratory antistatic agents need time to 'migrate' to the surface. When a new part is just demolded, the effect may not have appeared yet; allowing it to sit for a few days to a few weeks can actually be better. However, conversely, if the storage environment is too dry or the surface is contaminated with oil or repeatedly wiped, the migration layer will be depleted and cannot be replenished. The solution is to control storage humidity, avoid surface contamination, and, if necessary, appropriately increase the initial addition amount.
Q3: Which one should be chosen for a low humidity environment (below 40% RH)?
In low-humidity environments, the effect of moisture-absorbing migrating antistatic agents will significantly decrease. At this point, don't rely on adding a water film; go directly for conductive types—carbon black or carbon nanotube permanent systems, whose resistance does not depend on moisture. If cost is sensitive and black color is acceptable, conductive carbon black is a reliable choice.
Q4: Can carbon black conductive components still be made in light colors or transparent?
Conductive carbon black itself is black and cannot be used for light colors or transparency. For light-colored conductivity, one could consider carbon nanotube masterbatches (low addition, lighter color) or intrinsic conductive polymer coatings, but the cost and process requirements are higher; for transparent antistatic properties, the approach is currently more focused on coatings rather than adding carbon black to the bulk material.
Q5: Which is more cost-effective, external spraying or adding internally?
Look at the scenario. For bulk new parts that require long-term stability, internal casting can solve it in one go, with a low cost per kilogram; for already formed parts needing on-site emergency, small batches, and short-term use, external spraying saves the cost of modifying molds and formulas. Don’t rely on spraying for long-term maintenance—the labor and consumables add up and aren’t cheap, and consistency is hard to maintain.
Three-step checklist for choosing: Follow it to avoid detours
◆ Step 1 · Set resistor target: First clarify whether you need "dustproof and antistatic" (10^9 to 10^11) or "conductive discharge" (below 10^6), as well as the humidity range for the season of use and lifespan requirements.
◆ Step 2 · Choose the route: Transparent light color for short-term use → add migration type inside; Black high conductivity for long-term use → carbon black/carbon tube permanent type; Emergency for already formed parts → apply externally.
◆ Step 3 · Certification and Compatibility: Verify certifications such as ESD, food contact, and mining, check compatibility with lubricants, flame retardants, and printing adhesives, and conduct a small-scale parallel test of the resistance-humidity curve before scaling up.
Static electricity is invisible, but its losses can be calculated.
Antistatic agents are categorized into migration type (internal/external) and permanent type (carbon black/carbon nanotubes/conductive polymers). The choice depends on the product's requirements for resistance value and durability. Cologne New Materials can provide reference data for surface resistance of different systems and low VOC compliance documents; for electronics packaging and cleanroom scenarios, a permanent conductive system is recommended. Kilogram-scale samples are available for preliminary surface resistance and static decay testing.
Last year, a factory producing IC trays was complained about by a customer for electrostatic breakdown of chips, resulting in a huge compensation payment. Kolon New Materials recommended a carbon black conductive masterbatch system to them, with an addition amount of about 20%, and surface resistance controlled between 10^6 and 10^8 ohms. After sending kilogram-level samples, the customer conducted electrostatic decay tests, and the decay time dropped from more than 30 seconds to within 0.5 seconds. After resuming production, no more electrostatic breakdown incidents occurred, and the customer's chip factory orders expanded from one to three.
Have you measured the surface resistance? Is it 10 to the power of what?
Statement: The brands, trademarks, and product names mentioned in this article are owned by their respective original manufacturers. This article is a third-party material selection knowledge sharing; the grades, parameters, prices, certifications, and application cases mentioned are for reference only. Specific information should be based on the latest official data and batch inspection reports from the respective manufacturers. This article does not constitute any procurement or investment advice, and readers bear the risks of any actions taken based on it.
