Surface Ra of different plastic
molding	material		Ra index arrange μm
molding	material		0.012	0.025	0.05	0.1	0.2	0.4	0.8	1.6	3.2	6.3	12.5	25
inject	Thermoplastics	PMMA		0.025	0.05	0.1	0.2	0.4	0.8	1.6
		ABS		0.025	0.05	0.1	0.2	0.4	0.8	1.6
		AS		0.025	0.05	0.1	0.2	0.4	0.8	1.6
		PC			0.05	0.1	0.2	0.4	0.8	1.6
		PS			0.05	0.1	0.2	0.4	0.8	1.6	3.2
		PP				0.1	0.2	0.4	0.8	1.6
		PA				0.1	0.2	0.4	0.8	1.6
		PE				0.1	0.2	0.4	0.8	1.6	3.2	6.3
		POM			0.05	0.1	0.2	0.4	0.8	1.6	3.2
		PSU					0.2	0.4	0.8	1.6	3.2
		PVC					0.2	0.4	0.8	1.6	3.2
		PPO					0.2	0.4	0.8	1.6	3.2
		Chlorinated polyether					0.2	0.4	0.8	1.6	3.2
		PBT					0.2	0.4	0.8	1.6	3.2
	Thermosetting	Aminoplasts					0.2	0.4	0.8	1.6	3.2
		phenolics					0.2	0.4	0.8	1.6	3.2
		Silicone plastic					0.2	0.4	0.8	1.6	3.2
press		Aminoplasts					0.2	0.4	0.8	1.6	3.2
		phenolics					0.2	0.4	0.8	1.6	3.2
		Melamine				0.1	0.2	0.4	0.8
		Silicone plastic					0.2	0.4	0.8
		DAP						0.4	0.8	1.6	3.2
		Unsaturated polyester						0.4	0.8	1.6	3.2
		Epoxy plastic					0.2	0.4	0.8	1.6	3.2
		Plexiglass		0.025	0.05	0.1	0.2	0.4	0.8	1.6	3.2	6.3
		PA								1.6	3.2	6.3	12.5
		PTFE							0.8	1.6	3.2	6.3	12.5
		PVC								1.6	3.2	6.3	12.5
		Reinforced plastics								1.6	3.2	6.3	12.5	25

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