供应日本大坂OKP4光学镜头

Characteristics		Test method	Condition	Unit	OKP4	OKP4HT	(For reference)	(For reference)	PMMA
							PC (for optics)	COP	
Physical property	Specific gravity	Density method	—	g/cm3	1.22	1.26	1.2	1.01	1.19
	Water absorption	JIS K7209	—	%	0.2	0.2	0.2	< 0.01	0.3
	Glass transition temperature	DSC	—	℃	121	143	145	138	110
	Heat distortion temperature	JIS K7207	18.5kgf/cm2	℃	105	128	126	123	100
	Coefficient of thermal expansion	JIS K7197	30?120℃	10-5/K	7.2	6.9	7	7	6
Optical properties	Light transmittance	JIS K7105	700nm, 3mmT	%	90	90	89	92	93
	Refractive index (nd)	Abbe refractometer	589nm(20℃)	—	1.607	1.632	1.585	1.525	1.49
	Temperature dependence coefficient	Abbe refractometer	—	10-5/K	-13	-11	-12	-10	-10
	Abbe number	Abbe refractometer	—	—	27	23	29	56	58
Mechanical properties	Tensile strength	JIS K7113	—	MPa	71	65	52	59	73
	Tensile elongation	JIS K7113	—	%	9	10	110	40	5
	Flexural modulus	JIS K7203	—	MPa	2.7	2.5	2.4	2.1	3.3
	Flexural strength	JIS K7203	—	MPa	120	115	96	94	120
	Impact strength	ASTM D256	—	J/m	58	43	78	24	15.7
	Pencil hardness	JIS K5401	—	—	2H	H	B	H	2H
Moldability properties	MFR	JIS K6719	230℃,	g/10min	12	3	65 (300℃, 1.2kg)	21 (280℃, 2.16kg)	2 (230℃,
			2.16kg						3.8kg