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10秒装修报价 装修要花多少钱?获得精准报价,省钱30%
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1、PPR管品牌有:复大海科,中财、伟星、金德、菲时特、联塑、日丰等.
2、PPR管又称PPR水管,其中的PPR是其主要原料的英文缩写,英文全称:Polypropylen Random Copolymer
3、(三型无规共聚聚丙烯).PP(聚丙烯)是目前工业中广泛采用的塑料原料,主要分为均聚聚丙烯(PP-H)和共聚聚丙烯(PP-B和PP-R)两种.
4、PP-R管又叫三型聚丙烯管,采用无规共聚聚丙烯经挤出成为管材,注塑成为管件.是欧洲90年代初开发应用的新型塑料管道产品.PP-R是80年代末,采用气相共聚工艺使5%左右PE在PP的分子链中随机地均匀聚合(无规共聚)而成为新一代管道材料.它具有较好的抗冲击性能和长期蠕变性能.
希望我的回答能帮到您
你好,PPR管品牌有: 复大海科,中财、伟星、金德、菲时特、联塑、日丰等。 PPR管又称PPR水管,其中的PPR是其主要原料的英文缩写,英文全称:Polypropylen Random Copolymer (三型无规共聚聚丙烯)。
(1)挤出机 由于PP-R原料熔融黏度较大,熔化所需热量大,故对挤出设备有一定的特殊要求。螺杆直径一般有45mm、65mm、90mm等几种规格,长径比在30—33,按PP-R原料特性可设计两个特殊的混炼段,提高螺杆的塑化能力。在加料段应设计一个特殊的可控温冷却装置,用于控制物料进入机筒的温度。机筒各段及机头、模具均有可控温的加热段,各段温度范围为180—210℃。据资料介绍,国外的PP—R专用挤出机主电机的功率为100—140kW,螺杆转速最高可达到250r/min,根据挤出不同规格的管材其产量可达100—350kg/h。
(2)真空定径系统 PP-R管坯挤出后一般采用真空定径方式,在管坯进入定径套前设水环式冷却装置,防止温度较高、黏度较大的物料黏在定径套上。由于PP-R管材在冷却过程中放热量大,且管壁较厚,为了保证较高的挤出速度,一般冷却水箱长度在24m以上。另外管材对冷却水温有较高要求,通常在15—20℃,故应配备冷冻水循环系统以控制冷却水温度。
(3)辅助系统 PP-R管材挤出生产线自动化程度高,配有微机控制系统,能设定、记录及控制生产全过程。在加料口装有原料电子称量装置,能设定及精确控制挤出管材单位长度的质量,在真空定径箱后部设有红外线测厚装置,通过微机可设定、记录及自动控制管材的外径和壁厚。