Many customers and friends want to find out the glue wrapping method of fully biodegradable modified particle TPEE, and the information about it is naturally clear to professional manufacturers. Let's take a look at it together.

1.真包胶:TPEE与塑料、金属等材料通过化学作用在两种材料的键合界面形成牢固的焊接或键合作用，如分子渗透、极性基团的反应性连接和键合或类似的氢键，而没有任何机械和物理作用。无需粘合剂，可通过注塑直接与金属结合。

1. True bonding: TPEE and plastics, metals and other materials form firm welding or bonding at the bonding interface of the two materials through chemical action, such as molecular penetration, reactive connection and bonding of polar groups or similar hydrogen bonds, without any mechanical and physical effects. Without adhesive, it can be directly combined with metal by injection molding.

在这种加工方法中，TPEE和金属零件一般是整体包胶的，TPE的硬度尽可能高(70~80A及以上)，这样可以达到一定的包胶效果，因为TPE和金属的包胶不具有真正意义上的附着力(化学和分子水平)，金属完全被TPE的强度所包胶。此外，金属零件表面有凹槽和孔(如螺母和刀柄)。

In this processing method, TPEE and metal parts are generally coated as a whole, and the hardness of TPE is as high as possible (70 ~ 80A and above), which can achieve a certain coating effect, because the coating of TPE and metal does not have real adhesion (chemical and molecular level), and the metal is completely coated by the strength of TPE. In addition, the surface of metal parts has grooves and holes (such as nuts and tool handles).

2.假包胶:TPEE与硬质材料(塑料、金属或其他材料)纯靠孔洞、凹槽等卡扣方式进行物理机械结合，而不是单纯依靠两种材料的化学结合。两种材料的结合面没有分子水平的直接渗透，也没有极性基团或类似氢键的反应链接键(范德华力)。用粘合剂粘合。

2. False glue wrapping: TPEE and hard materials (plastic, metal or other materials) are physically and mechanically combined by snap methods such as holes and grooves, rather than simply relying on the chemical combination of the two materials. The bonding surface of the two materials has no direct penetration at the molecular level, and there is no polar group or reaction link bond similar to hydrogen bond (van der Waals force). Bond with adhesive.

有时候对于一些特殊产品，橡胶只是部分覆盖了金属零件的相应位置，不利于TPEE与金属零件的牢固结合。在需要涂覆的金属表面涂覆一层粘合剂是一种常见的想法。但实际上，由于TPEE与橡胶的成型工艺不同，对橡胶零件与金属零件的粘接牢固度有重要影响。胶粘剂类型的选择对于这类金属制品的涂装至关重要。

Sometimes, for some special products, rubber only partially covers the corresponding positions of metal parts, which is not conducive to the firm combination of TPEE and metal parts. It is a common idea to apply a layer of adhesive to the metal surface to be coated. However, in fact, due to the different molding process between TPEE and rubber, it has an important impact on the bonding firmness between rubber parts and metal parts. The choice of adhesive type is very important for the coating of this kind of metal products.

3.整体包胶

3. Overall coating

整体包胶相当于注塑一个TPEE塑料件，其中硬件产品是包胶的，没有化学键合，所以包胶还是可行的。一般硬度较高的TPEE，硬度在80A以上的都可以包胶，但是包胶的五金件要整体镀膜，如果只镀膜一部分很难实现。

Overall coating is equivalent to injection molding a TPEE plastic part, in which the hardware product is coated without chemical bonding, so coating is still feasible. Generally, TPEE with high hardness and hardness above 80A can be coated with glue, but the hardware coated with glue should be coated as a whole. If only part of the coating is difficult to achieve.

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4.局部包胶

4. Local coating

部分灌封，硬度偏软，强度不足，不易粘接，通过五金的孔洞处理，可以加强TPEE与五金的物理机械结合，从而提高灌封牢固度。这种包胶是很多情况下硫化橡胶零件包胶五金件，但是橡胶是硫化的。如果使用注射成型，很难部分包胶TPEE和硬件。如果五金件穿孔，会在五金件产品中注入TPEE胶，这可能会提高包胶牢固度。另一个客户尝试预粘五金，然后注塑，效果不好。

For some potting, the hardness is soft, the strength is insufficient, and it is not easy to bond. Through the hole treatment of hardware, the physical and mechanical combination of TPEE and hardware can be strengthened, so as to improve the firmness of potting. This kind of rubber wrapping is usually vulcanized rubber parts and rubber wrapping hardware, but the rubber is vulcanized. If injection molding is used, it is difficult to partially coat TPEE and hardware. If the hardware is perforated, TPEE glue will be injected into the hardware products, which may improve the firmness of glue wrapping. Another customer tried pre gluing hardware and then injection molding, and the effect was not good.