请教大家PU（聚氨酯）做的压带轮和橡胶做的有什么区别？
本帖最后由 音乐风 于 2020-3-11 23:35 编辑请教大家PU（聚氨酯）美国ATHAN CORP 公司生产做的压带轮和橡胶做的有什么区别？
老外易趣链接上价格差不多的！
补充内容 (2020-3-12 18:46):
说错了，是美国安培公司生产。 摩擦系数不一样。弹性不一样。聚氨脂比一般橡胶要贵，理论上，搞老化，耐油性好，寿命更长。 1、性质不同
聚氨酯是高分子主链中含有氨基甲酸酯基团的聚合物，称为聚氨酯。聚氨酯分为聚酯型聚氨酯和聚醚型聚氨酯两大类。
橡胶是一种具有可逆变形的高弹性高分子材料，在室温下具有弹性，在较小的外力作用下可产生较大的变形，在消除外力后可恢复原状。橡胶是一种完全无定形的聚合物。它的玻璃化转变温度（T g）低，分子量往往很大，大于几十万。
2、成分不同
橡胶是由乳胶制成的。乳胶中的一些非橡胶成分残留在固体天然橡胶中。一般来说，天然橡胶中含有92%-95%的橡胶碳氢化合物，而非橡胶碳氢化合物占5%-8%。干胶含水率不大于1%。
聚氨酯的主要原料是有机多异氰酸酯和端羟基化合物。
3、特性不同
橡胶的特性：
（1）天然橡胶具有良好的耐磨性、高弹性、断裂强度和延伸率。
（2）丁苯橡胶是一种低成本的非耐油材料，具有良好的耐水性，70硬度下弹性好，高硬度下压缩性差。
（3）氢化丁腈橡胶具有优异的耐腐蚀、耐拉伸、抗撕裂和压缩性能。
聚氨酯的特性：
（1）较高的机械强度和氧化稳定性；
（2）它具有很高的灵活性和弹性。
（3）它具有优良的耐油、耐溶剂、耐水、耐火性能。
以上内容来自百度
以下内容是我的肤浅看法，仅供参考：
无论是卡座还是开盘机，压带轮都是隔着磁带的带基（也是一种酯类物质）作用于主导轴上产生匀速的牵引力，所以用酯类物质做比用橡胶好，大家对针式打印机有印象吧，针式打印机的辊轮（筒）就是酯类物质，还有同步马达的传送皮带也是某种酯类的混合物质而不是橡胶
但是作为传送皮带，橡胶又比酯类物质好，伸缩性和弹性可以控制很自由，所以我们很少能看到聚酯物质做的传送带
在当年，纯的聚酯类物质的生产加工成本较橡胶贵，而含有各种添加成分的聚酯混合物的生产成本接近橡胶的生产成本
因此，目前能在开盘机和卡座上见到的历经几十年仍然完好的压带轮不多，那些已经变质的压带轮和后期仿制的代用品都不是高品质的酯类，而是混合物甚至是橡胶做的
目前能看到的高品质酯类物质做的压带轮就是STUDER A80 开盘机上的（24轨A80机器除外）
本帖最后由 音乐风 于 2020-3-12 18:45 编辑
是美国安培公司生产的，基本上的开盘机他们都有这个配套供应，美国易趣上有销售 400多一个！
1、版主的意思是PU的压带轮 是更加适合我们开盘机的；当初不采用这个材料很有可能从成本上面考虑。
2、从网络上查到的材料看来，打印机确实是聚氨酯包胶制成的。
3、安培公司生产各款开盘机的压带轮，并且他们采用的是双轴承的结构，估计噪声会更加少。
详见易趣上对该款轮子的介绍：NEW PINCH ROLLER FOR 1/4" TEAC X-3, X-7R, X-10R, X-1000R and X-2000RTAPE MACHINEDUAL BEARING DESIGN BUILT BY ATHAN CORPAthan Pinch Rollers will improve WOW and flutter spec's on your tape machine!ATHAN P/N: ATH-X3-4P OEM P/N: 5014175100Key AdvantagesThe new design pinch roller core is made out of brass which will dampen vibration that comes through the Capstan motor and transport. Made with new top quality polyurethane material that is the result of years of innovative research and development by Athan Corporation.It should last 4-5x longer than the original. Specifically developed with a natural color polyurethane which ELIMINATES the black residue created by other black rubber pinch rollers while making it easier for clients to detect dirt build-up on the pinch roller.Having bearings instead of bushings means you will not have runout on the pinch roller.This is because the bushings sit loosely on the shaft which creates runout problems, where bearings sit snug which eliminates runout.NOTE: When purchasing Athan Pinch Rollers, Pucks or other polyurethane products you may also consider adding:Pinch Roller Cleaning Solution (8oz) eBay Item Number: 272162917491Athan P/N:ATH-500-CSOur cleaning solution is recommended for maintaining all of Athan’s polyurethane products.It’s the same cleaner we use in house. Some Benefits Include:Environmentally safe and odor freeHelps your parts last longer because it will not cause them to dry up, as compared to using isopropyl alcoholWill not leave any film or residue on the surface, even if the part is not completely dry~~~~~~~~~~~~~~~~~~~~~~~~~~~~THE LARGEST PINCH ROLLER MANUFACTURER FOR TAPE RECORDER MACHINES IN THE WORLDIntroduction to Athan CorporationAthan Corporation was established in 1976 as a company committed to excellence in delivering quality products and services to professionals in the fields of pro-audio and high technology. After 18 years of playing an integral role in research and development for Ampex, Athan Corporation's president set out to build his own business geared toward meeting the needs of various industries, from disk drives to tape recorders, vascular devices to magnetic imagery. The professionals at Athan Corporation go the extra mile to troubleshoot and offer on-site consultation to improve the performance of a product or machine.Over the years, Athan Corporation has acquired a reputation for taking on challenging projects that require high accuracy and precision, working together with its customers to achieve a common goal.Our MissionAthan Corporation is committed to excellence in customer support and assistance. We take pride in offering the highest quality products and services to pro-audio and pro-video professionals. With an eye toward the future, we continually work to better ourselves with technically precisioned products and services to meet your needs for the changing times.~~~~~~~~~~~~~~~~~~~~~~~~~Why use Brass over Aluminum?Brass dampens the vibration that comes through the Capstan motor transport. A huge benefit.Even though brass changes color if not plated, you can take a piece of sandpaper and make it look new. The change is only superficial. Aluminum corrodes faster, bubbles and becomes a white powder which can't easily be restored. The oxide goes deep into the surface with aluminum, unlike the brass. A reason manufacturers may not use brass is that it's very expensive, 4x to 5x more expensive.The only companies that use brass are Athan and Studer.~~~~~~~~~~~~~~~~~~~~~~~SHIPPING DETAILSPlease take the time to choose the appropriate shipping option for your needs. Once ordered, there is a 2-3 BUSINESS DAY handling time for most parts to leave our facility (unless otherwise notified).WE ARE NOT OPEN ON WEEKENDS OR HOLIDAYS so keep that in mind for your handling/ shipping time frame as well. The shipping option time frame you choose will be on top of that.Standard shipping is USPS which takes 2-10 business days. International Clients - If shipped via USPS, our standard is First Class Mail International and time frame will vary by location. Shipping is generally 2-3 weeks. An item may be held at customs for a period of time, delaying the arrival of your order, which is out of our control. Due to these delays, on occasion, we have seen international shipments take 6-8 weeks. If you instead would like expedited shipping with complete door-to-door tracking please contact us so we can adjust your order. The shipping cost for International USPS Priority Express is $45 on average.Each destination country charges customs and administrative fees on dutiable shipments. It is important to consider the effects of duties, taxes, port handling fees and other customs charges when determining your shipment's total shipping charges. 查看资料，说是受温度变化大，冬天显现刚性！ 没有用过不知究竟是否这样！ 前几天我还打算用pu优力胶做个开盘机惰轮皮圈，楼主这么一说我就放心了。 双木兄：加工的时候上车床 要用好的刀头切削，理想状态是有专门的机加工设备的吧？ 老板是曾经在安培公司工作 {:4_471:} https://gd1.alicdn.com/imgextra/i1/4089584239/O1CN01ygS4QW1hBVURmTGGn_!!4089584239.jpg
到本网上直接找外径尺寸相同即可。 y9949 发表于 2021-2-18 13:36
这上从那里找买？ 本帖最后由 y9949 于 2021-2-24 14:45 编辑
木又 发表于 2021-2-20 16:54
这上从那里找买？
TB
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