In view of the strength loss and dimension shrinkage of polyester nonwoven used for the sewage pipeline in the hot-pressing process, the response surface methodology was proposed to optimize the technological parameters of lining material. Select the temperature, time and pressure to enhance the hot-pressing process of lining material with the response value of the rate of dimensional change and tensile strength. The results showed that the temperature was 180°C, time was 3s, and pressure was 2.8MPa. Under this process, the rate of dimensional change was 4.23%, transverse tensile strength was 7.95MPa, and longitudinal tensile strength was 5.26MPa. It showed that the response surface methodology had practical application value, and provided a theoretical basis for the hot-pressing parameters of lining material with maximum tensile strength and minimum dimensional shrinkage. The paper also tested the adhesive strength, air permeability and water permeability of lining material under the optimal process, founding that the prepared material had excellent adhesive strength, air permeability, water permeability, and could meet the construction requirements of pipeline rehabilitation and the use requirements of conveying medium.

针对污水管道用涤纶无纺布在热压过程中的强度损失和尺寸收缩问题，提出响应面法优化衬里材料工艺参数。选择温度、时间和压力，以尺寸变化率和抗拉强度的响应值来增强内衬材料的热压过程。结果表明，温度为180℃，时间为3s，压力为2.8MPa。在此过程中，尺寸变化率为4.23%，横向拉伸强度为7.95MPa，纵向拉伸强度为5.26MPa。说明响应面法具有实际应用价值，为具有最大抗拉强度和最小尺寸收缩的衬里材料的热压参数提供了理论依据。并测试了优化工艺下衬里材料的粘合强度、透气性和透水性，发现制备的衬里材料具有优良的粘合强度、透气性、透水性，能够满足管道改造的施工要求和使用要求。的输送介质。