Sliding Properties

Test Method

There are various evaluation test methods for sliding characteristics. The appropriate method depends on the application and situation. Devices for evaluating the basic sliding characteristics of resin include a Suzuki wear tester, Pin-on-Disk wear tester, and thrust wear tester (Amsler, etc.).

Limiting PV Value

カジノ シークレット キャッシュ バックing PV value (Load pressure × Velocity) represents カジノ シークレット キャッシュ バック at which the sliding surface of the material becomes deformed or melts due to frictional heat generation. Therefore, when conditions exceed カジノ シークレット キャッシュ バックing PV value, both friction and wear will increase significantly, making it unusable. カジノ シークレット キャッシュ バックing PV value increases as the resin heat resistance increases. It is necessary to use it at about 50 to 60% or lower than カジノ シークレット キャッシュ バックing PV value.

Frictional Properties

Frictional properties are indicated by the static friction coefficient (μS) and dynamic friction coefficient (μD). Fluororesin-based sliding materials are said to have the smallest friction coefficient.
The frictional resistance at startup is represented by μS. It is important that the μS be small and stable for applications where it repeatedly changes from static to movement. The μS immediately after molding and μS after initial wear are different.

Sliding Characteristics of Non-Reinforced Sliding Grades

Non-reinforced sliding grades that do not contain reinforcing fibers include SUMIPLOY カジノ シークレット キャッシュ バック and SUMIPLOY FS2200. These have a feature making it extremely difficult to damage the mating material in a dry state even when the mating material is a soft metal such as SUS or aluminum.

Limiting PV value

Figure 3-7-1 shows the velocity dependence of the limit PV values for カジノ シークレット キャッシュ バック and FS2200 compared with other engineering plastic sliding grades. This indicates that it has a limit PV value that is considerably higher than the compared sliding materials.

Figure 3-7-1 Velocity Dependence of Limiting PV Values for Non-Reinforced Sliding Grades

Figure 3-7-1 Velocity Dependence of Limiting PV Values for Non-Reinforced Sliding Grades

Frictional Properties

カジノ シークレット キャッシュ バック shows the smallest static friction coefficient in the dry state among sliding materials for injection molding. カジノ シークレット キャッシュ バック maintains its initial static friction coefficient even after wear and is stable over a long period of time.

Wear Properties

Table 3-7-1 shows the friction and wear properties of SUMIPLOY sliding grades in comparison with the sliding grades of other general-purpose engineering plastics. It shows stable wear resistance for low to high PV values. Figure 3-7-2 shows the relationship between the amount of wear and time for カジノ シークレット キャッシュ バック when P = 0.6MPa and V = 40m/min. The initial wear is smaller than that of fluororesins containing filler. It is also equivalent to fluororesins containing polyimide.

Table 3-7-1 カジノ シークレット キャッシュ バックr Properties of Non-Reinforced Sliding Grades (Thrust Type Testing Machine)

Measuring conditions Sample Dynamic
friction
coefficient μD
Cumulative
friction
amount ΔW (μ)
Wear
coefficient
K (mm/km-MPa)
Wear
of mating
material (mg)
Pressure P
(MPa)
Speed V
(m/min)
Mating material
1 10 SUS304 カジノ シークレット キャッシュ バック 0.16 3.5 1.2×10-6 Transfer
FS2200 0.12-0.30 11 3.8×10-6 0.27
PTFE-filled PC 0.12-0.31 95 33.3×10-6 0.13
PTFE-filled POM 0.13 8.7 3.0×10-6 0.10
0.6 40 SUS304 カジノ シークレット キャッシュ バック 0.18 11 1.6×10-6 0.01
FS2200 0.14-0.21 133 19.2×10-6 0.16
CF/PTFE filled PPS 0.40 132 19.2×10-6 13.6
PTFE-filled PC Above カジノ シークレット キャッシュ バックing PV value (melting within a few minutes)
PTFE-filled POM
0.1 100 SKH-2 カジノ シークレット キャッシュ バック 0.24 5.7 2.0×10-6 0.16
FS2200 0.29 85 29.5×10-6 0.14
CF/PTFE filled PPS 0.81 90 31.3×10-6 10.5
0.2 100 SKH-2 カジノ シークレット キャッシュ バック 0.22 5.4 0.9×10-6 0.24
CF/PTFE filled PPS 0.53 168 29.2×10-6 4.30

Figure 3-7-2 カジノ シークレット キャッシュ バックr Properties of Non-Reinforced Sliding Grades

P = 0.6MPa V = 40m/min Mating material: SUS304

Figure 3-7-2 カジノ シークレット キャッシュ バックr Properties of Non-Reinforced Sliding Grades

Sliding Characteristics of Fiber-Reinforced Sliding Grades

SUMIPLOY CS5220, CS5530, and CK3420 are reinforced grades with carbon fiber, inorganic filler, etc. These have excellent dimensional stability, mechanical strength and rigidity, a small coefficient of thermal expansion, and can even be used under harsh conditions with a high PV value. Although the friction coefficient is relatively large and has slight fluctuation, it can be used for various applications by using a mating metal material with high hardness, by applying a hardening treatment to the surface of the material, or by using it together with lubricating oil. However, keep in mind that these may damage soft metals such as SUS and aluminum.

Limit PV Values for SUMIPLOY Fiber-Reinforced Grades

Table 3-7-2 shows カジノ シークレット キャッシュ バックing PV values for SUMIPLOY CK3420, a fiber-reinforced grade.

Table 3-7-2 Limiting PV Values of Fiber-Reinforced Sliding Grades

Unit : MPa-m/min

CK3420
V=40m/min 160
V=100m/min 100

Mating material : SKH-2, room temperature-DRY

カジノ シークレット キャッシュ バックr Properties of SUMIPLOY fiber-Reinforced Grades

The following shows the PV value dependence of the dynamic friction coefficient μD when the velocity is V = 40 m/min, 100 m/min. Each grade shows a small value of 0.1 to 0.2 when the PV value is high (high load), but the friction coefficient is large when the PV value is low (low load). Therefore, it is a good sliding material for high loads and high speeds.
The wear resistance of these fiber reinforced grades is not good compared to non-reinforced sliding grades. Table 3-7-3 shows examples of カジノ シークレット キャッシュ バックr properties.

Table 3-7-3 カジノ シークレット キャッシュ バックr Properties of Fiber-Reinforced Sliding Grades

Sliding conditions Item CK3420
P = 0.6MPa
V = 40m/min

Room temperature-DRY
Friction coefficient
Wear coefficient
(mm/km/MPa)
Change in mating
material weight (mg)*
0.81
45×10-6

+1.9
P = 0.2MPa
V = 100m/min

Room temperature-DRY
Friction coefficient
Wear coefficient
(mm/km/MPa)
Change in mating
material weight (mg)*
1.00
36×10-6

+0.2

Mating material : SKH-2, sliding time : 48hr
* : + denotes transfer.

Figure 3-7-3 Relationship between Dynamic Friction Coefficient and PV

Figure 3-7-3 Relationship between Dynamic Friction Coefficient and PV
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