Flexible Fluorine (ETFE) Resin Tubing Black [Model Number: E-SJ-BK]

*If you are interested in 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-SJ-4.3$\times$6.4-BK and E-SJ-8$\times$10-BK.
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-SJ-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-SJ-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.

Case Study

Problem: A Single-Layer Teflon Tube is stiff and easy to break.

An UV ink-jet printing manufacturer (called “Company A” hereinafter) was looking for a flexible fluorine tubing for better handling and easy installation. The bending radius should be smaller and hard to break.

HAKKO Solution:

HAKKO proposed E-SJ-BK: Flexible Fluorine (ETFE) Resin Tubing Black and provided a sample. E-SJ-BK is made of three layers: the inner layer is made of ETFE fluorine, the middle layer is made of polyamide and the outer layer is made of polyurethane black. The inner layer shows higher levels of ink resistance. The outer layer is made of polyurethane black, which makes the tubing softer and more flexible. As a result, compared with a teflon tubing, E-SJ-BK is flexible and hard to break. Also, E-SJ-BK can cut the ultraviolet rays, so UV inks do not get harden. After Company A evaluates our E-SJ-BK, E-SJ-BK passed their criteria. Company A decided to use.

Frequently Asked Question

Question: E-SJ-BK is a multi-layer tubing. Is it easier to peel off the layer?
Answer: No. Even though E-SJ-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.

Question: E-SJ-BK is harder than I expected. I need a softer product.
Answer: If you have already known a teflon tube, you must have realized that E-SJ-BK is much softer than a teflon tube. Due to a multi-layer structure, E-SJ-BK is much more flexible than a teflon tube. However, if you still need a softer tubing than E-SJ-BK, we also have E-SJUS-BK: Flexible Fluorine (ETFE) Resin Tubing Black (Ultra Soft Type).

Technical Information

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

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

Test Sample	Minimum Bend Radius (mm)	Amount of Deflection (mm)
E-PD-4$\times$6	23 (Catalog Value: 25)	28
E-SJ-4$\times$6	23 (Catalog Value: 25)	31
PTFE Tubing (4$\times$6)	20	7
PFA Tubing (4$\times$6)	23	6

Results: “Amount of Deflection” is one indication of flexibility. Flexibility varies depending on hose (tubing). The larger the amount of deflection is, the more flexible the hose (tubing) is. The lower the minimum bend radius value is, the harder the hose (tubing) is. Thus, E-SJ and E-PD are much flexible than PTFE and PFA tubing.

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-SJ-2$\times$4-BK	20	2$\times$4	0 - 0.6	0 - 6	15
	100
E-SJ-3$\times$5-BK	20	3$\times$5			20
	100
E-SJ-4$\times$6-BK	20	4$\times$6			25
	100
E-SJ-4.3$\times$6.4-BK	20	4.3$\times$6.4			30
	100
E-SJ-5$\times$7-BK	20	5$\times$7	0 - 0.5	0 - 5	40
	100
E-SJ-6$\times$8-BK	20	6$\times$8	0 - 0.4	0 - 4	50
	100
E-SJ-8$\times$10-BK	20	8$\times$10	0 - 0.4	0 - 4	90
	100
E-SJ-8$\times$12-BK	20	8$\times$12	0 - 0.6	0 - 6	50
	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
SJ-1$\times$3-BK	1$\times$3	0 - 1.0	0 - 10	10
SJ-1.5$\times$3-BK	1.5$\times$3	0 - 0.6	0 - 6	10
SJ-2.5$\times$4-BK	2.5$\times$4	0 - 0.6	0 - 6	25
SJ-3$\times$4-BK	3$\times$4	0 - 0.6	0 - 6	30
SJ-5$\times$8-BK	5$\times$8	0 - 0.6	0 - 6	30
SJ-7$\times$10-BK	7$\times$10	0 - 0.4	0 - 4	50
SJ-9$\times$12-BK	9$\times$12	0 - 0.5	0 - 5	65

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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