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Pneumatic tubing is often selected by outside diameter, pressure rating, color, and price.That may be the case for many standard airlines, but it ignores one critical characteristic that may be of great importance in the case of vacuum systems, high-voltage circuits, and low-flow instruments: air permeability. In other words, gas molecules are highly likely to flow through an untarnished polymer membrane, thus, reducing pressure on the designed side and degrading the system’s performance. The extent of permeation depends on the plastic material, wall thickness, temperature, pressure differential, and gas type. Therefore, permeability has to be considered along with the bending…

Polyurethane Pneumatic Tubing Rarely made from base resin only. A variety of stabilizers, processing aids, pigments, lubricants, and modifiers may be added to improve its resistance to heat, moisture, sunlight, chemicals, abrasion, flexing, or other factors. The challenge is that one additive may negate the effect of another, such as by making the material too hard or too flexible. A compound that adds flame resistance could also lower the tensile strength or cause problems like discoloration. Buyers considering multiple additives should ask how they complement each other and what testing was done on the final tubing. It is also important to…

  In choosing polyurethane pneumatic tubing for use in machinery, the consumer can get an engineering specification full of data regarding materials and numbers. Nonetheless, all this information is only important to the extent that it is relevant to the application. Working pressure, bend radius, temperature range, chemicals exposure, and fittings compatibility are some of the factors that determine how relevant the information will be. Pneumatic tubing datasheets serve the purpose of avoiding complications associated with choosing the wrong tubing. What information should engineers check first on a pneumatic tubing datasheet? A technical data sheet generally provides plenty of information, but…

  In pneumatic tubing manufacture, the preparation of material prior to extrusion is likely to have an impact on the uniformity and performance of the tubing itself. In cases where multi-material tubing is manufactured using multiple types of polymer material in the construction, the control of moisture levels prior to processing assumes importance for manufacturers. The selection of tubing manufacturers requires not only consideration of the final properties of the tubing but also the manner in which the materials used in the manufacture process are processed. Why does material drying matter in pneumatic tubing manufacturing? Before polymer materials enter the extrusion…

  Ao comprar tubos pneumáticos, diversos fatores são normalmente considerados. As dimensões do tubo, a pressão máxima de trabalho, a flexibilidade e o preço são considerações importantes para potenciais compradores. No entanto, existem outros fatores relacionados à produção de tubos pneumáticos que podem ter efeitos significativos na consistência dos produtos de um fornecedor e na experiência de serviço do comprador. Para tubos de poliuretano, um dos indicadores mais importantes dos materiais de que são feitos é o índice de fluidez (MFI) da resina de TPU utilizada na produção do tubo. O MFI de uma resina de TPU determina…

  Para o projetista de sistemas pneumáticos e o comprador industrial de tubos pneumáticos, a qualidade do tubo vai além da simples movimentação de ar. Tubos de qualidade inferior podem causar vazamentos, curvaturas inadequadas, rachaduras e falhas prematuras. Ao selecionar tubos pneumáticos de poliuretano, muitos clientes consideram o diâmetro, a cor e o preço. No entanto, o processo de fabricação do tubo é o fator mais importante para determinar sua qualidade. O processo de extrusão do TPU, a qualidade do material, o resfriamento e o controle de qualidade durante a inspeção final são fatores decisivos para os tubos pneumáticos usados ​​em equipamentos de automação e aplicações industriais. Por que o processo de extrusão é importante em tubos de poliuretano?