Flexible Fluorine (ETFE) Resin Tubing Black (Ultra Soft Type) [Model Number: E-SJUS-BK]

*If you are interested in non-standard, made-to-order size, please fill out the following form. (We can also produce a special size that is not listed on the table above. Please note that MOQ applies for made-to-order size.)

Cautions:

We do not have our original fittings for E-SJUS-4.3$\times$6.4-BK and E-SJUS-8$\times$10-BK.
We do not have our original fittings for E-SJUS-1/8″$\times$1/4″-BK and E-SJUS-1/4″$\times$3/8″-BK. If you need our technical support in selecting the suitable fittings for these sizes, please fill out this form.
In case you have to use your fittings other than our original fittings, due to the laminated structure tubing, please use the joints to seal an inner surface of the tubing. Please do not use the joints to seal an outer surface of the tubing. This may result in the bursting or coming off from the tubing.
When you use our products, please refer to “Precautions for Use.” (“The Precautions for Use” is also available at the product specifications of E-SJUS-BK, which can be downloadable from here.)
In terms of chemical resistance, please refer to “Chemical Resistance Data.”
Although the inner layer is made of ETFE fluorine, please make sure whether or not E-SJUS-BK is usable for high purity fluids before you use.
Although the inner layer is resistant to fluids, depending on working environments, the fluids would be permeated through the inner layer, resulting in the danger of swelling and degradation of the middle or outer layer.
White powder (Low Molecular Weight in Resin) might come out on the tubing during storage. This white powder conforms to the “Positive List System of the Revised Food Sanitation Law” (effective on June 1, 2020), so there is no safety problem. Please wipe it off before use.

Case Study

Situation: We look for a softer fluorine product like a fluorine rubber tubing.

An ink-jet printing manufacturer (called “Company A” hereinafter) was looking for a flexible fluorine tubing like a fluorine rubber tubing for better handling and confined-space installation. So far, Company A has adopted a fluorine rubber tubing, but due to the product supply shortage, Company A had to look for the alternative product.

HAKKO Solution:

HAKKO proposed E-SJUS-BK: Flexible Fluorine (ETFE) Resin Tubing Black (Ultra Soft Type) and provided a sample. Company A was surprised that E-SJUS-BK, a non-rubber fluorine tubing, is so soft. Company A conducted the ink matching test, and it turned out that the result of E-SJUS-BK is better than that of fluorine rubber tubing. They decided to use E-SJUS-BK for their ink-jet printing machine.

Frequently Asked Question

Question: E-SJUS-BK is a multi-layer tubing. Is it easier to peel off the layer?
Answer: No. Even though E-SJUS-BK consists of multi-layers, the inner layer and the outer layer are greatly adhered each other. Thus, you do not have to worry about delamination.

Technical Information

(A) Relationship Graph between Working Temperature and Maximum Working Pressure

Test Sample: E-SJUS-4$\times$6-BK
UV Penetration Range: 240nm to 800nm
Test Machine: Spectrophotometer U-4100 (Hitachi, Ltd)

(C) Flexibility, Minimum Bend Radius, Kink Resistance and Amount of Deflection Data

Test Sample	Bending Stress Data (N/50mm)	Minimum Bend Radius (mm)	Kink Resistance (mm)	Amount of Deflection (mm)
E-SJUS-4$\times$6-BK	0.8	50	20	30
E-SJ-4$\times$6-BK	3.5	25	11	17
Fluorine Tube I.D. 4 mm $\times$ O.D. 6mm (Produced by Other Company)	-	23	11	5

Results: “Bending Stress Value” is one indication of flexibility. Flexibility varies depending on hose (tubing). The smaller the value of bending stress is, the more flexible the hose (tubing) is. Thus, E-SJUS-BK is much more flexible than E-SJ-BK.

Background: Polyurethane resin has a feature of great abrasion resistance, but it has a feature of grip feeling. Thus, work efficiency becomes lower due to the adhesion of a tubing.

Testing Methods: Tie a tubing of E-SJ-BK and E-SJUS-BK, make its radius to 100mm, and then hold with an air chuck at both ends. After holding, measure the resistance value when the air chuck is pulled at the certain speed. Please see the picture below.

Results: The outer layer resistance value of E-SJUS-BK is about one-fifth smaller than that of E-SJ-BK. This indicates that E-SJUS-BK shows higher outer layer smoothness than E-SJ-BK, which greatly improves the work efficiency. This is due to the fact that an outer layer of E-SJUS-BK uses a soft, smooth grade of polyurethane.

Test Sample	Smoothness Data (N)
E-SJUS-4$\times$6-BK	2 - 2.5N
E-SJ-4$\times$6-BK	10 - 13N

Resins	Critical Surface Tension (dyne/cm)	Contact Angle for Water ($\theta$)
ETFE Fluorine	22	96
PVDF Fluorine	25	82
High Density Polyethylene	31	73
Hard Vinyl Chloride	39	68
PET	43	-
Nylon	46	54

Critical Surface Tension: The surface tension of the assumed fluid which has the contact angle of zero against solid.

Results: Since the lower value of “Critical Surface Tension” and higher value of “Contact Angle for Water” show higher non-adhesivenss, ETFE fluorine material shows the highest non-adhesiveness.

Model Number	Standard Length	I.D. $\times$ O.D.	Working Pressure	Working Pressure	Minimum Bend Radius
			20$^\circ$C	20$^\circ$C	20$^\circ$C
	m	mm	MPa	Bar	mm
E-SJUS-2$\times$4-BK	20	2$\times$4	0 - 0.5	0 - 5	30
	100
E-SJUS-3$\times$5-BK	20	3$\times$5	0 - 0.5	0 - 5	35
	100
E-SJUS-4$\times$6-BK	20	4$\times$6	0 - 0.4	0 - 4	50
	100
E-SJUS-4.3$\times$6.4-BK	20	4.3$\times$6.4	0 - 0.4	0 - 4	50
	100
E-SJUS-6$\times$8-BK	20	6$\times$8	0 - 0.3	0 - 3	75
	100
E-SJUS-8$\times$10-BK	20	8$\times$10	0 - 0.15	0 - 1.5	100
	100
E-SJUS-1/8"$\times$1/4"-BK	20	3.18$\times$6.35	0 - 0.5	0 - 5	50
	100
E-SJUS-1/4"$\times$3/8"-BK	20	6.35$\times$9.53	0 - 0.4	0 - 4	80
	100

Model Number	I.D. $\times$ O.D.	Working Pressure	Working Pressure	Minimum Bend Radius
	I.D. $\times$ O.D.	20$^\circ$C	20$^\circ$C	20$^\circ$C
	mm	MPa	Bar	mm
SJUS-1/16"$\times$1/8"-BK	1.58$\times$3.18	0 - 0.5	0 - 5	30
SJUS-2$\times$3-BK	2$\times$3	0 - 0.4	0 - 4	50
SJUS-2.5$\times$4-BK	2.5$\times$4	0 - 0.5	0 - 5	50

Product Name	Materials, Characteristics
Fittings for Multi-Layer Tubing [Model Number: E-FTS-F]]	Material: SUS316L (Body) and SUS304 (Nut) It is designed by HAKKO tubing products, so you do not have to worry about fluid leakages and coming off. Specify temperature range and working pressure for each product. It is excellent in corrosion resistance (Body: made of 316L Steel Use). Since it is made of stainless steel (Passivation Treatment), you can transfer a wide variety of fluids.

PEEK (Carbon Reinforced) Nut Type Fittings [Model Number: AL]]	Material: PEEK Lightweight…Fitting weight is less than one-fifth, compared to same-size SUS joints, leading to overall weight reduction of equipment. Great Heat Resistance…PEEK material has excellent heat resistance among resins. Chemical Resistance…PEEK material has excellent resistance to a wide range of chemicals including acids, alkalis and organic solvents. Mechanical Strength…Carbon fiber is added to the engineering plastic of PEEK, which is strong in tensile and impact resistance.

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