日本三菱PC 7025C20批发
价格：26.00起
产品规格：
产品数量：
包装说明：
关 键 词：7025C20批发,日本三菱PC
行 业：塑料 通用/工程塑料 工程塑料
发布时间：2021-06-05
本公司建立了一套科学的市场供应系统,为广大客户提供服务和平价的产品。在竞争激烈的市场环境下，晶宏塑胶原料有限公司始终坚持以“市场”为导向，以“质量”为前提，不断开拓、发展自身的销售网络;以的产品、优惠的价格、竭诚的服务与广大新老客户精诚合作，共同发展，实现互惠互利的双赢目标。
Polycarbonate (PC) has good mechanical properties and good creep resistance, which is better than that of phthalamide and paraformaldehyde. Especially, PC modified by glass fiber has better creep resistance, so it can bear higher load at higher temperature and ensure dimensional stability. The main shortcomings of polycarbonate mechanical properties are easy to produce stress cracking, poor fatigue resistance, high notch sensitivity, no wear resistance and so on. PC has good high and low temperature resistance, good heat resistance at 120 ℃, and hot deformation temperature of 130 ~ 140 ℃. At the same time, it has good cold resistance, brittleness temperature is - 100 ℃, long-term service temperature is - 70 ~ 120 ℃. Moreover, its thermal conductivity and specific heat capacity are not high, its linear expansion coefficient is small, its flame retardancy is good, and it has self extinguishing property. As a weak polar polymer, PC has better electrical insulation although its electrical insulation is not as good as that of polyolefins. Because of its high glass transition temperature and low hygroscopicity, it can maintain good electrical properties under wide temperature and humidity conditions
PC与1953年由德国拜耳公司首先研究成功,并于1958年由拜耳公司首先实现了工业化生产, 至今已有四十多年历史。其制造工艺方法有溶液法、醋交换法、界面缩聚法和非法。PC，是一种无定型、无臭、无毒、高度透明的无色或微热塑性工程塑料，具有优良的物理机械性能，尤其是耐冲击性优异，拉伸强度、弯曲强度、压缩强度高; 蠕变性小，尺寸稳定; 具有良好的耐热性和耐低温性，在较宽的温度范围内具有稳定的力学性能，尺寸稳定性，电性能和阻燃性，可在－ 60 ～ 120 ℃下长期使用; 无明显熔点，在220 ～ 230 ℃呈熔融状态，由于分子链刚性大，树脂熔体黏度大; 吸水率小，收缩率小，尺寸精度高，尺寸稳定性好.
（PC）--工程塑料的简介
工程塑料一般是指可以作为结构材料承受机械应力，能在较宽的温度范围和较为苛刻的化学及物理环境中使用的塑料材料。
工程塑料可分为通用工程塑料和特种工程塑料两大类。
通用工程塑料通常是指已大规模工业化生产的、应用范围较广的5种塑料，
即：
聚酰胺（尼龙，PA）
聚碳酸酯（聚碳，PC）
聚（POM）
聚酯（主要是PBT，PET）
聚醚（PPO，或变性PPE）。
PC在工程上具有实用，其中产量，用途广而又早实现工业化生产的则是双A型PC，其特点是原料价格低廉，加工性能及制品性能超群，合成双A型PC有多种方法，但目前工业生产中采用的主要是法和酯交换法,纯PC树脂是一种无定形、无味、无臭、无毒、透明、呈微、白色或无色的刚而韧的热塑性聚合物；相对分子质量一般在2~7万；燃烧时慢燃，离火后慢熄，火焰呈，燃烧后熔融、起泡，发出的花果臭气味，PC综合性能优良，是重要的工程塑料.
Material ordering instructions:
1. Our company purchases goods through regular channels and can issue VAT invoice.
2.The customer shall be responsible for the defects of finished products caused by the processing of this batch of materials.
3. If there is any discrepancy between the quantity, price and quality ordered by customers, please contact our sales department in time.
4. The goods will be delivered within 24 hours after receiving your purchase order, and the goods can be delivered within 3 days outside Guangdong Province.
