pc/ml200(图)
pa9t 可乐丽 n1001
pvdf 吴羽 2950
pv塑c-15
pps东丽ar10mb
pc三养 3030
pa66德国巴斯夫a3x3g7
hdpe辽宁华锦化工70ea
pc/ml200(图)
tpu德国科思创拜耳255
hdpe伊朗石化60507
pbt杜邦sk605 bk851
pei 基础塑料 ef1006
pc/ml200(图)
pa66意大利兰蒂奇a rv 250af nc
abs英力士hh-106
tpv 土耳其英菲力 v0-574-70a
hips美国陶氏1110
lcp the compression pressure / holding time is the best appearance&size control for the plastic parts,&the pressure holding time plays an important role. in theory, the holding time is the time needed to solidify the gate. compared with other engineering plastics, pa46 usually requires only a very short holding time due to its rapid solidification characteristics. it can reduce the sag&hole caused by the volume contraction through the long enough pressure protection stage. however, the pressure protection should not be too high to oid the stress. one way to determine the correct pressure level is to increase the pressure pressure until the depression is not seen. after the complete cooling, it is cut at the thickest part of the plastic part to check if there is a hole. if necessary, the pressure protection pressure can be increased. one way to determine the holding time is to measure the weight of the plastic part,&then increase the holding time until the constant weight is obtained. a more complex approach is to install sensors in the city to determine the exact setting time of the gate. compared with pa66, pa46 needs only about half of the holding time. this combined with its higher mold temperature can explain why pa46 has a shorter period of time than other engineering plastics. 、pet重要原则机械1.机械原则挤出的基本机理很简单--一个螺杆在筒体中转动并把塑料向前推动。螺杆实际上是一个斜面或者斜坡,缠绕在中心层上。其目的是压力以便克服较大的阻力。就一台挤出机而言,有3种阻力需要克服:固体颗粒进料对筒壁的力和螺杆转动前几圈时进料区它们之间的相互力;熔体在筒壁上的附着力;熔体被向前推动时其内部的物流阻力。多数单螺杆是右旋螺纹,像木工和机器中使用的螺杆和螺栓。如果从后面看,它们是向转动,因为它们要尽力向后旋出筒体。在一些双螺杆挤出机中,两个螺杆在两个筒体中向转动并相互交叉,因此一个必须是右向的,另一个必须是左向的。在其它咬合双螺杆中,两个螺杆以相同的方向转动因而必须有相同的取向。然而,不管是哪种情况都有吸收向后力的止推轴承,的原理依然适用。、foreign language name、coating grade, low viscosity, powder, unreinforced, crystal type, ul94v-0, use temperature above 160 centigrade, suitable for metal coating、 、pc has very good mechanical properties, but the flow characteristics are poor, so the injection process of this material is difficult. the final expectation of the product should be based on the quality of the pc material. if the plastic parts require high impact resistance, low flow rate pc material is used, otherwise, high flow rate pc material can be used, so that the injection process can be optimized.、physical characteristics、(1) ppse4 (gf40)、pvc1. some metal ions in the pigment will cause the thermal oxygen deco-ition of pvc resin as figure 1.、last delivery day: the last trading day after second days、lcp1.1 advantages of material、4, improve/reduce the mold temperature.、it is usually in 750~1250bar, depending on the design of materials&products.、
、final treatment: soil (harmless industrial waste)、pa12的学名为聚十二内,又称尼龙12。其聚合的基本原料是,可依赖于石油化工。是半结晶-结晶热塑性材料。中文名聚十二内,外文名pa12又称尼龙12基本原料pa12塑胶图片它的特性和pa11相似,但晶体结构不同。pa12是的电气绝缘体并且和其它聚一样不会因影响绝缘性能。它有的抗冲击性机化学性。pa12有许多在塑化特性和增强特性方面的改良品种。和pa6及pa66相比,这些材料有较低的熔点和密度,具有非常高的回潮率。pa12对强氧化性酸无抵抗能力。pa12的粘性主要取决于湿度、温度和储藏时间。它的流动性。收缩率在0.5%到2%之间,这主要取决于材料品种、壁厚及其它工艺条件pa12聚12或尼龙12典型应用范围:水量表和其他商业设备,电缆套,机械凸轮,机构,光伏背板及轴承等。、the mechanism is the injection/shrinkage of the product.、4. low consumption, energy sing&economy、water absorption% iso62 0.02、grilamid tr, amorphous transparent polyamide
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