Shanghai Daoqin Plastics Co., Ltd.

plastics types type more, injection molding parts commonly used plastics main/primary has:PE, PP, PS, AS(SAN), BS, ABS, POM, PA, PC, PVC, ABS or AS＋ glass fiber reinforced material and other.

plastics separation structure, formed separation very complex, especially is copolymer, blending material and modified material and has various additives (如: filler, stabilizer, increase agent, flame retardant, mixed combined material and other) plastics 常常不 can use simple methods identification 出,需借助 chemical experiment/testing, testing device (light 谱仪) and other 手段才 can identification its formed formed 份.

different type type plastics need its type 别,实验室 usually is through precision analysis testing device identification ,如红 outer light degree 计, color 谱仪, color 质仪, magnetic 共振仪 and other. due to this testing device price non 常昂贵, generally parts production 厂家未必 has conditions 购置. 但实 use (experience property) plastics identification methods has very more, its in has types is most commonly used:《 specific gravity amount degree identification methods 》 and 《燃烧 features identification methods 》.

in has testing device analysis 化验室 情况 lower, can through density large small, phenomenon and appearance color, products property can different add separation; plastics color rear, very difficult use 肉眼直接看出 is types plastics, need use “看, 听, 闻, pressure, 摔, 咬” methods comprehensive identification. will various commonly used plastics features, products property can, identification methods and other simple introduction lower,供 large identification plastics material 时参考.

1, polypropylene (PP) (PP) 俗称百折胶

PP is most light types plastics, density is 0.9～0.91g/cm3, ratio water light, in water in can water 面. PP material 粒呈乳 white, semi transparent, wax material,燃烧时 speed degree slow,火焰 upper 端呈黄 color, in belt/tape 蓝, has 燃滴滴落 phenomenon,熄灭火焰 rear, has 一股石 wax odor. PP products light hard, heat resistant, corrosion resistant, fatigue resistance excellent 良, tough property good (can upper bending, 折迭),PP products easy aging.

备注:PP and PE(polyethylene (PE)) features versus 似,但PE density is 0.91～0.95g/cm3, density ratio PP稍 large, hardness ratio PP稍 low,鉴定PP时应 and PE need fine add separation 开.  

2, styrene (PS) hard 胶

pure PS is types hard 而脆 无 color transparent plastics, density is 1.05g/cm3,接近 water specific gravity. PS燃烧 speed degree slow,火焰黄亮, light, 冒黑烟,熄灭 rear has 一股特殊 煤 odor;PS products hardness high,脆 property large, easy and generate internal stress cracking phenomenon, use can 折断(脆 property bad);PS products surface gloss property good, resistant impact strong/high degree low.

3, acrylonitrile - styrene copolymer (AS or ASN) transparent large force 胶

AS pellets

SAN(AS) is PS modified rear types micro color transparent material, density is 1.08g/cm3, ratio water heavy.SAN slow speed 燃烧, 火焰闪 light, 黄亮, 冒黑烟,熄灭时 has 一股似PS刺激 property odor (腥味),SAN products tough property increase large, ratio PS products property has improvement.

4, acrylonitrile-butadiene-styrene (ABS) copolymer (ABS resin) ultra- 不碎胶

ABS is types general purpose engineering plastics, material 粒呈牙黄 color (象牙白), is transparent plastics, density is 1.06g/cm3, ratio water heavy. ABS can slow speed 燃烧, 火焰黄亮, light, 冒黑烟,熄灭 rear, has 一股似PS刺激 property 腥味. flame retardant ABS very flame resistant 烧,离火 rear self-extinguishing phenomenon.ABS glass fiber material coarse 糙,呈 shallow color, gloss property relatively 差.ABS products tool has “ tough, hard, rigid ” comprehensive property can, strong/high degree high, rigid property good, hardness, resistant impact property, products surface gloss property good.

5, polyoxymethylene (POM) (POM) 俗称赛钢

POM is types white transparent material, density very large, generally is 1.42g/cm3, ratio water heavy.

燃烧时火焰呈蓝 color,几乎无 color (不冒烟),熄灭 rear has strong/high 烈, property aldehyde odor (easy 流眼泪). POM products hardness high, rigid property good, wear resistant, strong/high degree high; products surface gloss property good,手模时 has types 油腻感,POM is types rigid property very high engineering plastics, and metal property can versus 似.

6, polycarbonate (PC) (PC) anti elastic 胶

PC is types comprehensive property can excellent engineering plastics, pure PC density is 1.20g/cm3, ratio water heavy. PC material micro 黄, transparent 状. PC燃烧时,火焰明亮,冒 a large amount of 黑烟, 起泡, 炭化,离火 rear has self-extinguishing phenomenon, has 一股略刺激 property 酚(香)味.PC products resistant impact strong/high degree high, resistant temperature property good (120℃), tough property good,且 has relatively high hardness, rigid property.PC products 常发生 internal stress cracking phenomenon.

7, polyamide (PA) (PA) nylon

PA product types more, Common has PA6, PA66, PA1010 and other. pure PA density in 1.051.15g/cm3 between,PA is types shallow color, semi transparent material 粒, appearance comparison coarse 糙(不 light slip). PA燃烧时火焰 upper lower 蓝,噼啪起滴 formed 纤,离火 rear can self-extinguishing (不冒黑烟), has 一股燃烧角质(指甲, 头发) odor.

8, polyvinyl chloride (PVC) (PVC)

PVC is types heat stabilized property relatively plastics, types type relatively more, separation is soft 质, semi hard 质, hard 质PVC三 types. PVC large more is white powder material or sheet/slice material, material and other. pure PVC is color transparent material 粒, density is 1.251.45g/cm3, ratio water heavy. slow,火焰 upper 黄, lower 绿, 冒黑烟,离火 rear can self-extinguishing, has 一股刺激 property (HCL↑)焦糊 odor. ｛检查 plastics in is has chlorine 元素, commonly used copper filament in 生灯(酒精灯) upper add hot color hot 状态, again a small amount of plastics,置于 copper filament upper add hot,火焰呈现蓝 green (CuCL2),则认 is plastics in has chlorine ｝, PVC products strong/high degree rigid property relatively low.

9, has machine 玻璃(PMMA)

has machine also add force, its material large more is color transparent (has is micro color), density is 1.20g/cm3 left right. products transparent property most good, and PS versus ratio tough easy 脆裂;但 and PC versus ratio its tough property / strong/high degree relatively low, surface hardness low, easy by hard material 划伤.

PMMA relatively easy 燃烧,火焰呈蓝 color (黄顶),不冒烟,燃烧 easy 出现起滴起泡 phenomenon;离火 rear still can 继续燃烧,并发出 strong/high 烈 花果臭味(similar 于榴莲 odor) or 腐烂 蔬菜臭味.