Difference Between FKM and FFKM

Thekey difference与FKMFFKM is thatFKM offers a less degree of versatility compared to FFKM.

FKM stands forfluoroelastomerwhereas FFKM stands forperfluoroelastomer。FKM和FFKM是两种类型的弹性体materials. Therefore, these are two types of polymers having elastic properties.

内容

1.Overview and Key Difference
2.What is FKM
3.什么是ffkm
4.Side by Side Comparison – FKM vs FFKM in Tabular Form
5.概括

What is FKM?

The term FKM stands for fluoroelastomer. This type of material was developed during world war II as an antidote to the leaking nitrile seals that plagued the aircraft of the era. Fluorinated polymers that were developed as a solution for this matter contained chemically inert氟-carbon bonds that deliver a combination of temperature performance and a high chemical resistance. There are two major types of FKM as FKM type 1 and type 2. These grades were commercialized in the 1950s. The fluorine content, which ranges around 26.7% to 67%, of this material, offers increased chemical resistance.

There are different important advantages of using FKM material, and they include a wide temperature range it can withstand, excellent chemical resistance, excellent weather ability and ozone resistance, more resistance to burning than non-fluorinated hydrocarbons, high density and high-quality feel, good mechanical properties, etc.

However, there are some disadvantages of using this FKM material as well. These include the tendency to swell in fluorinated solvents, inability to use with molten or gaseous alkali metals, higher price compared to other non-fluorinatedhydrocarbons, rapid failure to choosing the wrong grade, etc. The applications of FKM material include the automotive industry, chemical processing, oil and gas production, heavy-duty machinery, and aerospace applications.

什么是ffkm?

FFKM代表perfluoroelastomer。这种材料是在发现FKM材料后左右开发的。生产这种材料的需求是由于需要更具化学性和加工的高温能力。目前，该材料已成为航空航天和汽车行业中的常规固定装置。

Figure 01: Structure of a Perfluorocarbon Compound

There are some important advantages of using FKM material; this includes the wide temperature range that it can withstand, excellent chemical resistance, excellent gas and liquid performance, excellent weather ability and ozone resistance, high density, self-extinguishing nature and non-flammability in air, etc.

也有一些缺点。它可以在氟化的溶剂中显着膨胀，不能与熔融或气态碱金属一起使用，与其他弹性体，费用等相比，它具有较大的热系数。

FKM和FFKM有什么区别？

The term FKM stands for fluoroelastomer whereas the term FFKM stands for perfluoroelastomer. The key difference between FKM and FFKM is that FKM offers a less degree of versatility compared to that of FFKM. FFKM can withstand comparatively high temperatures than FKM. Moreover, FKM is more resistant to burning than non-fluorinated hydrocarbon compounds while FFKM is self-extinguishing and non-flammable in air. Besides, application-wise, FKM is used in automotive, chemical processing, oil and gas production, heavy-duty machinery, aerospace applications, etc. while FFKM is useful as a regular fixture in aerospace and automotive industries.

The following infographic presents the differences between FKM and FFKM in tabular form.

概括– FKM vs FFKM

FKM and FFKM are elastomer materials containing fluorocarbon structures. they have slightly different chemical and physical properties. The key difference between FKM and FFKM is that FKM offers a less degree of versatility compared to that of FFKM.