电子烟用塑胶材料汇总

电子烟作为一种模仿传统

卷烟的口吸式电子产品，

主要由电芯、

雾化器与塑胶部件等构成。

目前电子烟可大致分为两大类:

(1)烟油型电子烟,其主要成分是食用级或者医药级别的甘油、烟用香精、烟草提取物等。呈现烟草、水果、饮料味。通过雾化手段,将用料等变成蒸汽后,让用户吸食。烟油型电子烟又可分为封闭系统、开放系统。

(2)加热不燃烧烟草产品,即低温卷烟,其烟弹的用料是与传统香烟里的烟丝保持一致,只是通过非燃烧的方式,用低于温度350℃的电子控制的加热刀片加热,从而释放(含尼古丁)的烟雾供用户吸食。典型的产品有菲莫国际的IQOS,英美烟草的Glo及日本烟草的ploom tech。

电子烟通过雾化器将液体烟变成蒸汽，瞬间达到超高温，如果选用的材料不安全，反复加热的过程中会不断释放有毒物质。为此电子烟烟具与人体接触部位一般都要求用医疗食品级别材料。

食品级材料的要求

一般而言，与食物直接接触或与人体接触的制品在高温或恶劣环境下不会改变其特性，也不会分解和释放对人体有害的物质， 这种材料可称为食品级材料。

食品接触包装材料及制品，都需要按照检测标准进行检测认证，全球各个地区对于食品级材料的检测都有着不同的法规要求；

例如国内的GB 4806食品级检测

美国FDA食品级检测

法国DGCCRDF食品级检测

德国LFGB检测

欧盟食品级检测EU 1935/2004/EC

FDA是美国食品药物管理局（U.S. Food and Drug Administration）的英文缩写，是国际医疗审核权威机构，由美国国会即联邦政府授权，FDA是一个由医生、律师、药理学家促进和提高国民健康的政府卫生管制的监控机构，通过FDA认证的食品、药品、化妆品和医疗器具对人体是确保安全而有效的

FDA检测和注册的产品大概可以分为这几种：医疗器械,、药品、食品、化妆品、激光类产品和与食品接触材料测试（即食品级测试）对于所有与食品饮料直接接触，或者直接与人口舌接触的器皿，材料等，都必须通过FDA标准的检测认证，才能进入美国市场。

主流塑胶（PCTG、PPSU、PP、PC、PEEK、透明尼龙等）材料信息：

01.PCTG

PCTG was previously used in cosmetic packaging and plastic water cups due to its glass-like transparency and density, no bisphenol A, excellent food hygiene and flame retardancy, etc. It is currently used in most e-cigarette oil tanks, cigarette holders, cigarette rod shells, etc., and the demand is huge.

PET resin is a linear homopolymer formed by polycondensation of diol (ethylene glycol, EG) and dibasic acid (terephthalic acid, PTA), while copolyester is a polyester modified by alcohol or acid, including PETG, PCTG and PCTA as well as degradable copolyester. PCTG is a non-crystalline copolyester. In its production process, a certain amount of ethylene glycol is replaced by 1,4-cyclohexane dimethanol (CHDM), which can prevent crystallization and improve processing and transparency.

目前电子烟知名品牌都有在采用PCTG材料，主要应用在烟嘴，烟油仓甚至与外壳上。

02.PPSU

PPSU is a new type of non-crystalline thermoplastic engineering plastics, which is light, high-strength, good odor at high temperatures, does not contain bisphenol A, will not denature even after repeated heating, has good sterilizability, and can be in contact with water for a long time. And one of its typical applications is baby bottles, so it is also called "baby bottle material".

Polyphenylene sulfone PPSU is synthesized from 4,4'-biphenol and 4,4'-dichlorodiphenyl sulfone through salt formation, polycondensation and other steps. The molecular structure is as follows:

 PPSU树脂的结构式

图 IQOS上盖外壳采用PPSU改性材料（来源网络）

03.PEEK

PEEK is a thermoplastic special engineering plastic. Due to its good mechanical properties, high melting point, biocompatibility and non-toxicity, it meets FDA certification. Polyetheretherketone (PEEK) refers to a linear aromatic semi-crystalline polymer whose main chain consists of aromatic, ketone and ether bonds. It belongs to the polymer family of "aromatic polyketone".

图 PEEK 结构式

PEEK is currently used in the field of heat-not-burn electronic cigarettes for the shell of heat-not-burn electronic cigarettes, the base of the heating plate, the atomization chamber and other parts. In addition to the shell and heating base of IQOS, the QOQ of Yanwa Technology and the CIGRIG smoking parts also use PEEK materials.

 图 电子烟周边PEEK加热配件

04.透明尼龙

It has excellent transparency (even higher than PC and close to PMMA), and is superior to general transparent polymer materials (such as PS, PC, PMMA, etc.) in terms of environmental stress cracking resistance, oil solvent resistance, scratch resistance, and wear resistance. Common transparent nylon types include PA MACM12, PA 12/MACMI, PA 6I/X, etc.

PA12 结构式

05.PP

Polypropylene is a semi-crystalline thermoplastic. It has high impact resistance, strong mechanical properties, and is resistant to corrosion by many organic solvents and acids and alkalis. With good performance, PP is the only plastic that can be put into a microwave oven. It has high strength and flexural resistance (50,000 times) and will not break at -20°C.

06.PEI

PEI, scientific name of polyetherimide, is a non-crystalline thermoplastic with high mechanical strength and rigidity. It has very high creep resistance in a wide temperature range and long-term high working temperature. In addition, it has very good hydrolysis resistance and dimensional stability. The disadvantage is that the price is slightly higher.

PEI 结构式

PEI is mainly used in mid-to-high-end atomizer mouthpieces.

07.POM

Polyoxymethylene POM, commonly known as "super steel" or "saigang", has a smooth, shiny, hard and dense material with a light yellow or white appearance. It is an engineering plastic with excellent comprehensive performance after polyamide PI and one of the five general-purpose engineering plastics.

POM has good mechanical properties and rigidity, and can be combined with metal materials; POM has excellent fatigue resistance and creep resistance; good wear resistance, self-lubrication and friction resistance; it is currently widely used in electronic cigarette mouthpiece materials.

08.PC

PC material is transparent, has good impact resistance and good dimensional stability, and is used in electronic cigarette atomizers and mouthpieces. It is understood that the transparent mouthpiece of E-hose electronic hookah uses a PC plastic mouthpiece, and some electronic cigarette brands also use PC material for the shell of the cigarette cartridge.

09.硅胶

食品级硅胶是一种无毒，无味，高透明度和不黄变的; 柔软，有弹性，抗扭结和不可变形; 无开裂，使用寿命长，耐寒耐高温; 其撕裂强度和优异的电气性能; 它具有透明度高，无味，不黄变，无结霜等优点。

目前应用较多的为电子烟烟嘴硅胶套，密封件以及电子烟外壳。

除了以上介绍的医疗食品级塑胶材料，也还有很多正在开发的材料或将被应用在电子烟的烟嘴甚至雾化仓部位、加热底座等配件上。

电子烟产品从研发到生产，采用高度安全有保障的材料有利于产品健康有序的可持续性发展，随着电子烟品质管控的加强，行业将会进入一个新的发展阶段。

 The End