Can be processed by conventional plastic processing methods such as injection molding and extrusion molding

Chemicals/Elastomers/Rubber Other

EARNESTON™

General name: Thermoplastic elastomer compound

Sales format: Pellet

Examples

EARNESTON™ is high performance thermoplastic elastomer compound based on various kind of elastomers, such as SEPTON™, HYBRAR™ and KURARITY™, manufactured by Kuraray Co., Ltd. Various kinds of goods can be made with EARNESTON™ using conventional molding methods for thermoplastic resins (e.g., injection molding, extrusion and blow molding) without complicated vulcanizing process. It is possible to replace vulcanized rubber. This safe material is free from substances such as sulfur and chlorine. It is also environmentally friendly.

Applications

Medical equipment

Automotive parts

Home appliances/Electronic parts

Industrial parts/Building materials

Sporting goods

Daily necessities

Characteristics

Excellent rubber elasticity and tensile strength

Wide range of hardness (Shore A 0 to 95)

Cold resistance (up to minus 45ºC)

Low specific gravity (same specific gravity of polypropylene, 0.9; weight can be reduced by 30% to 40% compared with vulcanized rubber)

Excellent resistance to heat deterioration, weatherability and ozone resistance

Can be processed by conventional plastic processing methods such as injection molding and extrusion molding

Excellent colorability

Standard grades and properties

Injection molding grades: CJ Series
Item	Unit	Grade			Test method	Measurement conditions
Item	Unit	CJ001N	CJ002N	CJ003N	Test method	Measurement conditions
Specific gravity	－	0.90	0.90	0.90	JIS K7112	Water displacement method
Hardness	－	40	60	80	JIS K6253	Type A
MFR	g/10min.	2.0	15	15	JIS K7210	230ºC, 21.18N
Tensile stress: 100%	MPa	0.9	1.7	3.3	JIS K6251	Dumbbell shape No. 3 Tensile speed: 500mm/min.
Tensile stress: 300%	MPa	1.3	2.4	4.3
Tensile strength	MPa	10.0	13.3	17.2
Elongation at break	％	1000	930	850
Tear strength	N/mm	17	26	44	JIS K6252	Angle type without notch
Compression set	％	28	36	48	JIS K6262	70ºC×22hr
Permanent elongation	％	8	9	16		100% × 10min. － 10min.
Ozone resistance	－	No crack	No crack	No crack	JIS K6259	50pphm × 40ºC, 20% elongation × 500h
Mold shrinkage rate	％	1.5～2.0	1.5～2.0	1.5～2.0		Disc (120mm in diameter, 2mm thickness) injection molding
Brittle temperature	ºC	－60＞	－60＞	－60＞	JIS K6261
Color tone	－	Translucent	Translucent	Translucent	Visual
Food hygiene	－	Conformity^*	Conformity^*	Conformity^*	Ministry of Health, Labour and Welfare Notification No. 20, No. 370	*Excluding n-heptane extraction test

Extrusion molding grades: CE Series
Item	Unit	Grade			Test method	Measurement conditions
Item	Unit	CE001	CE002	CE003	Test method	Measurement conditions
Specific gravity	－	0.90	0.90	0.90	JIS K7112	Water displacement method
Hardness	－	40	60	80	JIS K6253	Type A
MFR	g/10min.	6.0	5.0	4.5	JIS K7210	230ºC, 49.03N
Tensile stress: 100%	MPa	0.9	1.8	3.5	JIS K6251	Dumbbell shape No. 3 Tensile speed: 500mm/min.
Tensile stress: 300%	MPa	1.5	2.8	4.8
Tensile strength	MPa	12.0	16.0	22.0
Elongation at break	％	940	920	810
Tear strength	N/mm	15.7	28.4	48.0	JIS K6252	Angle type without notch
Compression set	％	33	37	47	JIS K6262	70ºC×22hr
Permanent elongation	％	6	8	21		100% × 10min. － 10min.
Ozone resistance	－	No crack	No crack	No crack	JIS K6259	50pphm × 40ºC, 20% elongation × 500h
Mold shrinkage rate	％	1.5～2.0	1.5～2.0	1.5～2.0		Disc (120mm in diameter, 2mm thickness) injection molding
Brittle temperature	ºC	－60＞	－60＞	－60＞	JIS K6261
Color tone	－	Translucent	Translucent	Translucent	Visual
Food hygiene	－	Conformity^*	Conformity^*	Conformity^*	Ministry of Health, Labour and Welfare Notification No. 20, No. 370	*Excluding n-heptane extraction test

Special grades
Item	Unit	Transparent/high flow	High rubber elasticity	Soft	Ultra Soft	Transparent/oil-free	Test method	Measurement conditions
Item	Unit	CJ101	CJ102N	CJ103	JS20N	FY35N-01	Test method	Measurement conditions
Specific gravity	－	0.90	0.90	0.90	0.89	0.91	JIS K7112	Water displacement method
Hardness	－	40	40	15	1	90	JIS K6253	Type A
		－	－	－	－	35		Type D
		－	－	47	20	－		Type E
MFR	g/10min.	－	－	－	15	－	JIS K7210	190ºC, 21.18N
MFR	g/10min.	70	5.0	0.4	－	4.5	JIS K7210	230ºC, 21.18N
Tensile stress: 100%	MPa	0.7	1.0	0.3	0.1	6.8	JIS K6251	Dumbbell shape No. 3 Tensile speed: 500mm/min.
Tensile stress: 300%	MPa	1.4	2.0	0.5	0.2	8.6
Tensile strength	MPa	11.5	11.0	5.5	3.5	19.0
Elongation at break	％	800	750	1100	1100＜	800
Tear strength	N/mm	18.6	23.0	21.6	7.4	－	JIS K6252	Angle type without notch
Compression set	％	80＜	80＜	18	65	－	JIS K6262	70ºC×22hr 25ºC×22hr
Compression set	％	38	20	6	－	－		70ºC×22hr 25ºC×22hr
Permanent elongation	％	4	4	5	6	－		100% × 10min. － 10min.
Ozone resistance	－	No crack	No crack	No crack	－	－	JIS K6259	50pphm × 40ºC, 20% elongation × 500h
Mold shrinkage rate	％	1.0～2.0	1.0～2.0	1.0～2.0	1.0～2.0	0.7～1.6		Disc (120mm in diameter, 2mm thickness) injection molding
Brittle temperature	ºC	－60＞	－60＞	－60＞	－60＞	－5＞	JIS K6261
Color tone	－	Transparent	Translucent	Translucent	Transparent	Transparent	Visual
Food hygiene	－	Conformity^*	Conformity^*	Conformity^*	Conformity^*	Conformity^*	Ministry of Health, Labour and Welfare Notification No. 20, No. 370	*Excluding n-heptane extraction test

Related website

EARNESTON™ website

Contact us

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Compound Marketing and Sales Department, Compound Division Kuraray Plastics Co., Ltd.: Osaka
Osaka Umeda Twin Towers North, 8-1, Kakuda-cho, Kita-ku, Osaka 530-8611, Japan
Tel.: +81-6-7635-1521

Tokyo
Tokiwabashi Tower, 2-6-4, Otemachi, Chiyoda-ku, Tokyo, 100-0004, Japan
Tel.: +81-3-6701-2277

Nagoya
2-13-30, Higashisakura, Higashi-ku, Nagoya, Aichi 461-0005, Japan
Tel.: +81-52-935-7991

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