Separators

Targray supplies Dry & Wet Stretched Polyolefin Separators, including Polypropylene (PP) and Polyethylene (PE) for use in the manufacture of secondary Lithium-ion batteries. This product contains micro and nano pores to provide excellent ion-transportation in the battery.

Polypropylene (PP) Separator

The evolution of Li-ion batteries from consumer electronic devices to large batteries for use in electric vehicles requires a superior battery Separator technology. Our advanced PP separator has a high shut down temperature and excellent mechanical strength suitable for use in EV batteries and other power cell applications.

Polypropylene Separator Key Features & Benefits:

• Higher shut down temperature and melting point for improved safety
• Homogenous pore size and distribution
• High puncture resistance
• Low shrinkage (<4% @ 105º)
• Excellent air permeability of 20-40 Gurley sec, Porosity >40

Property		PP16	PP20	PP25	PP32	PP40
Thickness		16 ± 2	20 ± 2	25 ± 2	32 ± 2	40 ± 2
Basis Weight (g/m²)		8 ± 2	10.3 ± 2	12.8 ± 2	16 ± 2	20.5 ± 2
Porosity (%)		42 ± 2	42 ± 2	42 ± 2	42 ± 2	42 ± 2
Permeability (s/100 cc)		250 ± 100	300 ± 100	400 ± 100	500 ± 150	650 ± 150
Break Strength (kgf/cm²)	MD	≥ 1100	≥ 1100	≥ 1100	≥ 1100	≥ 1100
	TD	≥ 100	/	/	≥ 100	≥ 100
Break Elongation (%)	MD	30-150	30-150	30-150	30-150	30-150
	TD	/	/	/	/	/
Puncture Strength (g)		≥ 200	≥ 300	≥ 300	≥ 450	≥ 600
Heat Shrinkage 105°C (%)	MD	≤ 3	≤ 3	≤ 3	≤ 3	≤ 3
	TD	≤ 1	≤ 1	≤ 1	≤ 1	≤ 1
Shut-Down Temperature (°C)		≤ 150	≤ 150	≤ 150	≤ 150	≤ 150

Polyethylene (PE) Separators – Dry Stretch

PE Dry-Stretch separators are used in the manufacture of secondary Li-ion batteries. This product contains micro and nano pores to provide excellent ion-transportation in the battery. The dry method produces a high quality Separator that offers several advantages to the customer as compared to Separators made by the wet stretch method.

Dry-Stretch Polyethylene Separators Key Features & Benefits:

• Uniform thickness
• Excellent chemical resistance, High electrolyte absorption, wettability
• Low cost due to dry stretch process
• Thermal shutdown control
• High MD tensile strength

Model Name	PE1116	PE1120	PE1125	PE1130	PE1140
Thickness (µm)	16	20	25	30	40
Porosity (%)	46
Air Permeability (Gurley Sec/100 ml)	150	180	220	250	290
Tensile Strength	MD:≥1600	MD:≥1400	MD:≥1400	MD:≥1500	MD:≥1300
Elongation (%)	MD:≥50	MD:≥70	MD:≥70	MD:≥70	MD:≥50
	TD:≥100	TD:≥150	TD:≥150	TD:≥150	TD:≥100
Shut Down Temperature (°C)	122.5
Heat Shrinkage (105°C, 1 hr)	MD: < 5%
	TD: = 0%

Polyethylene (PE) Separators – Wet Stretch

Targray’s line of Polyethylene separators are used widely for consumer electronics, high power and high energy batteries. Starting with Ultra-high Density Polyethylene our wet stretch process results in excellent porosity, homogenous nano-pore structure, and excellent strength characteristics.

Wet-Stretch Polyethylene Separators Key Features & Benefits of our:

• Uniform thickness
• Good ion penetration
• Excellent puncture resistance rate
• Good performance in high capacity batteries

Item		Unit	12A	16A	16B	16C	20A	20B	20C	22A
Width		mm	≤ User Spec ± 0.5	≤ User Spec ± 0.5	≤ User Spec ± 0.5	≤ User Spec ± 0.5	≤ User Spec ± 0.5	≤ User Spec ± 0.5	≤ User Spec ± 0.5	≤ User Spec ± 0.5
Thickness		µm	12 ± 2.0	16 ± 2.0	16 ± 2.0	16 ± 2.0	20 ± 2.0	20 ± 2.0	20 ± 2.0	22 ± 2.0
Length		mm	1000 + 10/-0	1000 + 10/-0	1000 + 10/-0	1000 + 10/-0	1000 + 10/-0	1000 + 10/-0	1000 + 10/-0	1000 + 10/-0
Permeability (Gurley Type)		Sec/ 100 ml	180 ± 50	180 ± 50	230 ± 50	270 ± 50	180 ± 50	230 ± 50	290 ± 50	230 ± 50
Porosity		%	40 ± 5	45 ± 5	45 ± 5	45 ± 5	45 ± 5	45 ± 5	45 ± 5	45 ± 5
Break Strength	MD	kgf/cm	≥1200	≥1200	≥1200	≥1200	≥1200	≥1200	≥1200	≥1200
	TD		≥1200	≥1200	≥1200	≥1200	≥1200	≥1200	≥1200	≥1200
Break Elongation	MD	%	≤150	≤150	≤150	≤150	≤150	≤150	≤150	≤150
	TD		≤150	≤150	≤150	≤150	≤150	≤150	≤150	≤150
Puncture Strength	gf	≥400	≥500	≥500	≥500	≥500	≥500	≥500	≥500	≥500
Heat Shrinkage	MD	%	≤5	≤5	≤5	≤5	≤5	≤5	≤5	≤5
	TD	%	≤5	≤3	≤3	≤3	≤3	≤3	≤3	≤3
Shut-down Temp (actual)	°C	150 ↓	150 ↓	150 ↓	150 ↓	150 ↓	150 ↓	150 ↓	150 ↓	150 ↓
Shut-down Temp (DSC)	°C	136 ~ 140	136 ~ 140	136 ~ 140	136 ~ 140	136 ~ 140	136 ~ 140	136 ~ 140	136 ~ 140	136 ~ 140

To review the Product Properties, please view our Product Data Sheets or contact Targray to help decipher which line of separators is best suited for your Lithium-ion battery production.