This research paper reports a study on thermal and sound insulation samples developed from recycled cotton/polyester (recycled cotton/PET) for construction industry applications. The waste recycled cotton and polyester fiber is a potential source of raw material that can be considered for thermal and sound insulation applications, but its quantities are limited. While the quantities are limited, waste recycled cotton fiber was mixed with recycled/PET fiber in 50/50 proportions in the form of two-layer nonwoven mats with a chemical bonding method. The samples such as cotton (color and white), polyester (color and white), and cotton-polyester blend (color and white) were prepared. All the samples were tested for thermal insulation, sound absorption, moisture absorption, and fiber properties as per the ASTM standard. Also, behaviors of six recycled cotton/polyester nonwoven samples under high humidity conditions were evaluated. The sound absorption coefficients were measured according to ASTM E 1050 by an impedance tube method, the sound absorption coefficient over six frequencies 125, 250, 500, 1000, 2000, and 4000 Hz were calculated. The result revealed that nonwoven mats that are prepared from recycled/PET/cotton waste have confirmed more than 70% of the sound absorption coefficient and the recycled nonwoven mats provided the best insulation, sound absorption, moisture absorption, and fiber properties. The recycled waste cotton/ polyester nonwoven mats have adequate moisture resistance at high humidity conditions without affecting the insulation and sound-absorbing properties.

中文翻译：

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再生棉/涤纶化学粘合非织造布的隔热隔音性能

本研究论文报告了一项关于由再生棉/聚酯（再生棉/PET）开发的建筑行业应用的隔热和隔音样品的研究。废再生棉和聚酯纤维是可考虑用于隔热和隔音应用的潜在原材料来源，但其数量有限。虽然数量有限，但废再生棉纤维与再生/PET 纤维以 50/50 的比例以两层无纺垫的形式通过化学粘合方法混合。准备了棉（彩色和白色）、涤纶（彩色和白色）、棉涤混纺（彩色和白色）等样品。所有样品均按照 ASTM 标准进行了隔热、吸音、吸湿和纤维性能测试。还，评估了六个再生棉/聚酯非织造布样品在高湿度条件下的行为。根据ASTM E 1050通过阻抗管法测量吸声系数，计算了六个频率125、250、500、1000、2000和4000Hz的吸声系数。结果表明，由回收/PET/棉废料制成的无纺垫已确认吸音系数超过70%，并且再生无纺垫提供了最佳的隔热、吸音、吸湿和纤维性能。回收的废棉/涤纶无纺垫在高湿度条件下具有足够的防潮性能，且不影响隔热和吸音性能。根据ASTM E 1050通过阻抗管法测量吸声系数，计算了六个频率125、250、500、1000、2000和4000Hz的吸声系数。结果表明，由回收/PET/棉废料制成的无纺垫已确认吸音系数超过70%，并且再生无纺垫提供了最佳的隔热、吸音、吸湿和纤维性能。回收的废棉/涤纶无纺垫在高湿度条件下具有足够的防潮性能，且不影响隔热和吸音性能。根据ASTM E 1050通过阻抗管法测量吸声系数，计算了六个频率125、250、500、1000、2000和4000Hz的吸声系数。结果表明，由回收/PET/棉废料制成的无纺垫已确认吸音系数超过70%，并且再生无纺垫提供了最佳的隔热、吸音、吸湿和纤维性能。回收的废棉/涤纶无纺垫在高湿度条件下具有足够的防潮性能，且不影响隔热和吸音性能。和 4000 Hz 的计算。结果表明，由回收/PET/棉废料制成的无纺垫已确认吸音系数超过70%，并且再生无纺垫提供了最佳的隔热、吸音、吸湿和纤维性能。回收的废棉/涤纶无纺垫在高湿度条件下具有足够的防潮性能，且不影响隔热和吸音性能。和 4000 Hz 的计算。结果表明，由回收/PET/棉废料制成的无纺垫已确认吸音系数超过70%，并且再生无纺垫提供了最佳的隔热、吸音、吸湿和纤维性能。回收的废棉/涤纶无纺垫在高湿度条件下具有足够的防潮性，同时不影响绝缘和吸音性能。