压差法中压力差的存在不会影响材料透气性-2
PET（25μm）
设定压力差 kPa | 透氧量1 | 实际上腔压力 kPa | 环境温度 ℃ | 环境湿度 ％RH | 试验时间 | P2（E-12） |
150 | 70.043 | 142.9 | 40.2 | 10.3 | 2007-3-23 | 2.666 |
150 | 68.683 | 147.3 | 40 | 10.9 | 2007-3-24 | 2.614 |
150 | 67.035 | 150.2 | 39.8 | 9.1 | 2007-3-24 | 2.552 |
130 | 69.159 | 130.3 | 39.7 | 8.5 | 2007-3-26 | 2.632 |
130 | 68.341 | 130.9 | 40 | 8.7 | 2007-3-26 | 2.601 |
130 | 71.781 | 130.1 | 40.2 | 9.4 | 2007-3-27 | 2.733 |
110 | 66.621 | 114.1 | 39.9 | 7.6 | 2007-3-27 | 2.536 |
110 | 68.801 | 110.8 | 39.9 | 8.3 | 2007-3-28 | 2.619 |
110 | 65.887 | 111.7 | 40.1 | 8 | 2007-3-29 | 2.509 |
90 | 66.866 | 88.6 | 40.1 | 6.7 | 2007-3-29 | 2.545 |
90 | 66.492 | 90.9 | 39.8 | 9.1 | 2007-3-30 | 2.531 |
90 | 68.481 | 89.2 | 40.1 | 10 | 2007-3-30 | 2.607 |
70 | 66.565 | 72.2 | 40.1 | 10 | 2007-3-31 | 2.533 |
70 | 68.352 | 69.3 | 39.9 | 9.1 | 2007-3-31 | 2.602 |
70 | 67.791 | 67.8 | 39.9 | 7.2 | 2007-4-3 | 2.58 |
50 | 66.962 | 53 | 40.1 | 5.5 | 2007-4-3 | 2.549 |
50 | 67.753 | 50.2 | 40 | 5.4 | 2007-4-4 | 2.578 |
50 | 68.495 | 51.7 | 40 | 5.6 | 2007-4-4 | 2.607 |
30 | 68.574 | 31.9 | 39.8 | 6 | 2007-4-5 | 2.611 |
30 | 67.818 | 31.9 | 40 | 6.8 | 2007-4-5 | 2.582 |
30 | 67.894 | 29.3 | 40 | 6.9 | 2007-4-6 | 2.585 |
1. 透氧量单位：cm3/m2·24h·0.1MPa
2. P 渗透系数单位：cm3·cm/cm2·s·cmHg
PET（70μm）
设定压力差kPa | 透氧量1 | 实际上腔压力kPa | 温度℃ | 环境湿度％RH | 试验时间 | P2（E-12） |
150 | 26.179 | 143.8 | 40 | 8.9 | 2007-5-31 | 2.791 |
150 | 26.283 | 146.8 | 40.1 | 9.4 | 2007-6-2 | 2.802 |
150 | 26.348 | 146 | 39.7 | 8.8 | 2007-6-4 | 2.808 |
130 | 26.337 | 129.9 | 40.1 | 8.5 | 2007-6-5 | 2.808 |
130 | 26.724 | 128.8 | 39.9 | 9.6 | 2007-6-6 | 2.849 |
130 | 25.982 | 127.4 | 40.1 | 9.1 | 2007-6-7 | 2.769 |
110 | 28.56 | 108.6 | 40 | 13.3 | 2007-6-9 | 3.044 |
110 | 26.116 | 108 | 40.1 | 8.4 | 2007-6-11 | 2.783 |
110 | 26.226 | 109.5 | 39.9 | 9.7 | 2007-6-26 | 2.795 |
90 | 26.28 | 89.2 | 40 | 9.7 | 2007-6-12 | 2.8 |
90 | 26.212 | 91.2 | 39.9 | 8.4 | 2007-6-13 | 2.794 |
90 | 26.309 | 88.4 | 40.1 | 8 | 2007-6-14 | 2.804 |
70 | 26.524 | 69.7 | 40.1 | 8.1 | 2007-6-15 | 2.826 |
70 | 25.778 | 70.2 | 39.9 | 7.8 | 2007-6-16 | 2.748 |
70 | 26.055 | 67.4 | 40.3 | 7.2 | 2007-6-18 | 2.777 |
50 | 26.305 | 50.8 | 39.8 | 8.1 | 2007-6-19 | 2.803 |
50 | 26.415 | 50.9 | 39.9 | 8.7 | 2007-6-20 | 2.815 |
50 | 26.341 | 50.7 | 39.8 | 8.9 | 2007-6-21 | 2.806 |
30 | 27.138 | 28.3 | 39.8 | 8.4 | 2007-6-22 | 2.893 |
30 | 29.179 | 28.5 | 39.9 | 14.2 | 2007-6-23 | 3.111 |
30 | 28.237 | 28.3 | 40 | 10.8 | 2007-6-25 | 3.01 |
1. 透氧量单位：cm3/m2·24h·0.1MPa
2. P 渗透系数单位：cm3·cm/cm2·s·cmHg
PA（35μm）
设定压力差 kPa | 透氧量1 | 实际上腔压力 kPa | 环境温度 ℃ | 环境湿度 ％RH | 试验时间 | P2（E-12） |
150 | 31.14 | 144.5 | 40 | 7 | 2007-4-25 | 1.66 |
150 | 30.293 | 144.2 | 39.9 | 6 | 2007-4-26 | 1.614 |
150 | 30.622 | 147.8 | 40.1 | 6.6 | 2007-4-26 | 1.632 |
130 | 31.08 | 129.1 | 39.9 | 6 | 2007-4-27 | 1.656 |
130 | 30.994 | 126.8 | 40.2 | 6.8 | 2007-4-27 | 1.651 |
130 | 30.179 | 127.4 | 40.1 | 5.7 | 2007-4-28 | 1.608 |
110 | 30.778 | 109 | 40.1 | 7.5 | 2007-4-28 | 1.64 |
110 | 28.373 | 112.4 | 39.8 | 6.4 | 2007-4-29 | 1.512 |
110 | 29.954 | 111.5 | 39.8 | 7 | 2007-4-29 | 1.596 |
90 | 29.7 | 89.8 | 40.1 | 6.3 | 2007-4-30 | 1.582 |
90 | 33.342 | 89.8 | 40 | 9 | 2007-5-8 | 1.776 |
90 | 32.449 | 87.7 | 39.9 | 7.9 | 2007-5-9 | 1.729 |
70 | 32.073 | 71.4 | 39.9 | 6.5 | 2007-5-10 | 1.709 |
70 | 32.13 | 70.8 | 39.8 | 7.6 | 2007-5-10 | 1.712 |
70 | 31.915 | 70.8 | 40.1 | 9 | 2007-5-11 | 1.701 |
50 | 32.355 | 47.9 | 39.9 | 8.4 | 2007-5-11 | 1.724 |
50 | 31.882 | 51 | 40 | 6.6 | 2007-5-12 | 1.699 |
50 | 32.414 | 51 | 40.2 | 6.1 | 2007-5-14 | 1.728 |
30 | 34.235 | 31.1 | 39.9 | 8 | 2007-5-15 | 1.825 |
30 | 32.741 | 28.2 | 39.9 | 8.8 | 2007-5-15 | 1.745 |
30 | 34.053 | 28.4 | 40 | 7.8 | 2007-5-16 | 1.815 |
1. 透氧量单位：cm3/m2·24h·0.1MPa
2. P 渗透系数单位：cm3·cm/cm2·s·cmHg
PE（40μm）
设定压力差 kPa | 透氧量1 | 实际上腔压力 kPa | 环境温度 ℃ | 环境湿度 ％RH | 试验时间 | P2（E-10） |
150 | 6839.503 | 147 | 40.3 | 7.7 | 2007-3-21 | 4.166 |
150 | 6375.467 | 147.3 | 40.2 | 7.1 | 2007-3-21 | 3.883 |
150 | 6624.777 | 152.2 | 40.2 | 8.4 | 2007-3-22 | 4.035 |
130 | 6479.419 | 134.5 | 40.1 | 6.6 | 2007-3-22 | 3.946 |
130 | 6910.986 | 125.9 | 40.6 | 9.8 | 2007-3-23 | 4.21 |
130 | 6849.957 | 129.2 | 40.3 | 10.6 | 2007-3-24 | 4.173 |
110 | 6542.002 | 115.9 | 40.3 | 8.2 | 2007-3-26 | 3.984 |
110 | 6642.656 | 109.5 | 40.3 | 9.5 | 2007-3-27 | 4.046 |
110 | 6367.305 | 110.2 | 40.2 | 7 | 2007-3-27 | 3.878 |
90 | 6740.132 | 92 | 40.2 | 7.1 | 2007-3-19 | 4.105 |
90 | 6660.778 | 89 | 40.4 | 7.7 | 2007-3-20 | 4.057 |
90 | 6555.234 | 94.3 | 40.3 | 7.9 | 2007-3-28 | 3.993 |
70 | 6261.578 | 72.3 | 40.2 | 7.4 | 2007-3-28 | 3.813 |
70 | 6183.373 | 68.9 | 40.2 | 7.8 | 2007-3-29 | 3.766 |
70 | 6365.943 | 71.8 | 40.1 | 7.1 | 2007-3-29 | 3.877 |
70 | 6283.765 | 70.1 | 40.3 | 8.7 | 2007-3-30 | 3.827 |
50 | 6307.62 | 50.3 | 40.2 | 9.6 | 2007-3-30 | 3.841 |
50 | 6317.998 | 50 | 40.3 | 9.9 | 2007-3-31 | 3.848 |
50 | 6301.076 | 50.1 | 40.2 | 8.6 | 2007-3-31 | 3.838 |
30 | 6253.406 | 28.6 | 40.1 | 7.2 | 2007-4-2 | 3.808 |
30 | 6231.984 | 31.4 | 40.1 | 6.4 | 2007-4-3 | 3.796 |
30 | 6268.955 | 31.4 | 40.1 | 5.5 | 2007-4-3 | 3.818 |
1. 透氧量单位：cm3/m2·24h·0.1MPa
2. P 渗透系数单位：cm3·cm/cm2·s·cmHg
CPP（40μm）
设定压力差 kPa | 透氧量1 | 实际上腔压力 kPa | 环境温度 ℃ | 环境湿度 ％RH | 试验时间 | P2（E-10） |
150 | 3517.144 | 146.8 | 40.2 | 7.1 | 2007-4-7 | 2.142 |
150 | 3359.836 | 146 | 40.3 | 7.9 | 2007-4-10 | 2.047 |
150 | 3520.87 | 148.1 | 40.2 | 6.7 | 2007-4-10 | 2.144 |
130 | 3377.844 | 128.2 | 40.2 | 7.1 | 2007-4-11 | 2.057 |
130 | 3395.334 | 130.6 | 40.1 | 7.6 | 2007-4-12 | 2.068 |
130 | 3479.875 | 130.7 | 40.2 | 9.3 | 2007-4-12 | 2.119 |
110 | 3358.835 | 110.2 | 40.3 | 8.8 | 2007-4-13 | 2.045 |
110 | 3246.123 | 111.3 | 40.2 | 8 | 2007-4-13 | 1.977 |
110 | 3250.58
| 40.1 | 7.8 | 2007-4-14 | 1.98 | |
90 | 3273.196 | 91.2 | 40.2 | 8.7 | 2007-4-17 | 1.993 |
90 | 3411.028 | 93.9 | 40.2 | 7.5 | 2007-4-17 | 2.078 |
90 | 3245.795 | 87.6 | 40.3 | 7.8 | 2007-4-18 | 1.977 |
70 | 3372.471 | 71.8 | 40.2 | 7.5 | 2007-4-18 | 2.054 |
70 | 3292.422 | 71.6 | 40.2 | 7.5 | 2007-4-19 | 2.006 |
70 | 3462.035 | 71.4 | 40.3 | 7.9 | 2007-4-19 | 2.108 |
50 | 3360.205 | 52.6 | 40.3 | 7.4 | 2007-4-20 | 2.046 |
50 | 3642.071 | 49.6 | 40.2 | 6.8 | 2007-4-20 | 2.218 |
50 | 3461.258 | 49.6 | 40.2 | 5.9 | 2007-4-21 | 2.107 |
30 | 3448.136 | 30.8 | 40.5 | 7.3 | 2007-4-24 | 2.1 |
30 | 3463.782 | 30.7 | 40.2 | 7.1 | 2007-4-24 | 2.11 |
30 | 3306.572 | 30.6 | 40.3 | 6.3 | 2007-4-25 | 2.014 |
1. 透氧量单位：cm3/m2·24h·0.1MPa
2. P 渗透系数单位：cm3·cm/cm2·s·cmHg
OPP（38μm）
设定压力差 kPa | 透氧量1 | 实际上腔压力 kPa | 环境温度 ℃ | 环境湿度 ％RH | 试验时间 | P2（E-10） |
150 | 1837.343 | 144.9 | 40.5 | 7.1 | 2007-5-19 | 1.063 |
150 | 1832.112 | 152.3 | 40.5 | 6.7 | 2007-5-21 | 1.06 |
150 | 1842.149 | 146.7 | 40.3 | 8.4 | 2007-5-21 | 1.065 |
130 | 1783.726 | 131.4 | 40.3 | 7.1 | 2007-5-22 | 1.032 |
130 | 1825.424 | 129.1 | 40.3 | 7.9 | 2007-5-22 | 1.056 |
130 | 1770.502 | 131.7 | 40.2 | 7.7 | 2007-5-23 | 1.024 |
110 | 1832.491 | 111.2 | 40.1 | 8.2 | 2007-5-23 | 1.06 |
110 | 1828.034 | 111.4 | 40.3 | 7.6 | 2007-5-24 | 1.057 |
110 | 1833.576 | 110.4 | 40.2 | 10 | 2007-5-24 | 1.061 |
90 | 1812.494 | 89.8 | 40.1 | 9.3 | 2007-5-25 | 1.049 |
90 | 1835.822 | 89.3 | 40.3 | 10.1 | 2007-5-25 | 1.062 |
90 | 1932.818 | 92.8 | 40.2 | 10.1 | 2007-5-26 | 1.117 |
70 | 1936.47 | 74.1 | 40.2 | 12.2 | 2007-5-28 | 1.121 |
70 | 1845.819 | 68 | 40.3 | 11 | 2007-5-29 | 1.068 |
70 | 1921.772 | 68 | 40.2 | 11.8 | 2007-5-29 | 1.112 |
50 | 1856.65 | 53.1 | 40.4 | 9.8 | 2007-5-30 | 1.074 |
50 | 1804.705 | 52.5 | 40.4 | 9.5 | 2007-5-30 | 1.044 |
50 | 1794.759 | 46.4 | 40.2 | 8.2 | 2007-5-31 | 1.039 |
30 | 1757.315 | 27.6 | 40.2 | 8.9 | 2007-5-31 | 1.017 |
30 | 1773.059 | 30.7 | 40.3 | 7.8 | 2007-6-1 | 1.026 |
30 | 1793.915 | 30.7 | 40.3 | 9.7 | 2007-6-1 | 1.038 |
1. 透氧量单位：cm3/m2·24h·0.1MPa
2. P 渗透系数单位：cm3·cm/cm2·s·cmHg
PE/EVOH/PE（55μm）
设定压力差kPa | 透氧量1 | 实际上腔压力kPa | 温度℃ | 环境湿度％RH | 试验时间 | P2（E-13） |
150 | 1.718 | 133.9 | 40.3 | 12.7 | 2007-4-14 | 1.439 |
150 | 1.631 | 142 | 40.3 | 12.4 | 2007-4-18 | 1.366 |
150 | 1.97 | 145.5 | 40.2 | 13.2 | 2007-4-19 | 1.65 |
130 | 1.685 | 126.5 | 40.3 | 14.3 | 2007-4-21 | 1.41 |
130 | 1.58 | 129.5 | 40.3 | 12.9 | 2007-4-24 | 1.323 |
130 | 1.489 | 128.8 | 40.3 | 12.7 | 2007-4-25 | 1.247 |
110 | 1.673 | 113.7 | 40.2 | 12.6 | 2007-4-26 | 1.4 |
110 | 1.556 | 111 | 40.2 | 12.9 | 2007-4-27 | 1.303 |
110 | 1.663 | 111.5 | 40.3 | 14.3 | 2007-4-28 | 1.392 |
90 | 1.744 | 91.7 | 40.2 | 14.1 | 2007-4-29 | 1.46 |
90 | 1.744 | 91.7 | 40.2 | 13.7 | 2007-4-30 | 1.46 |
90 | 1.813 | 88.2 | 40.2 | 16.4 | 2007-5-12 | 1.518 |
70 | 2.022 | 72.7 | 40.3 | 13.2 | 2007-5-15 | 1.693 |
70 | 1.921 | 69.9 | 40.3 | 12.5 | 2007-5-17 | 1.608 |
70 | 2.072 | 71 | 40.2 | 13 | 2007-5-18 | 1.734 |
1. 透氧量单位：cm3/m2·24h·0.1MPa
2. P 渗透系数单位：cm3·cm/cm2·s·cmHg
PA/PE（80μm）
设定压力差kPa | 透氧量1 | 实际上腔压力kPa | 温度℃ | 环境湿度％RH | 试验时间 | P2（E-11） |
150 | 103.799 | 145.6 | 40.3 | 8 | 2007-6-2 | 1.264 |
150 | 103.32 | 147.1 | 40.2 | 8.6 | 2007-6-2 | 1.258 |
150 | 98.856 | 147 | 40.3 | 7.9 | 2007-6-4 | 1.204 |
130 | 101.588 | 128.5 | 40.3 | 9.2 | 2007-6-4 | 1.237 |
130 | 99.593 | 128.6 | 40.3 | 8.4 | 2007-6-5 | 1.213 |
130 | 99.439 | 128.8 | 40.3 | 9.4 | 2007-6-5 | 1.211 |
110 | 96.492 | 111.7 | 40.2 | 8.5 | 2007-6-6 | 1.175 |
110 | 99.276 | 107.9 | 40.3 | 10.1 | 2007-6-6 | 1.209 |
110 | 97.638 | 111.5 | 40.3 | 9.1 | 2007-6-7 | 1.189 |
90 | 92.085 | 90.3 | 40.4 | 9.5 | 2007-6-8 | 1.121 |
90 | 103.866 | 89.4 | 40.3 | 13.5 | 2007-6-8 | 1.265 |
90 | 91.755 | 93.4 | 40.3 | 8.6 | 2007-6-9 | 1.118 |
70 | 93.954 | 71.7 | 40.3 | 8.8 | 2007-6-9 | 1.145 |
70 | 90.571 | 71.6 | 40.3 | 7.4 | 2007-6-11 | 1.103 |
70 | 92.123 | 71.5 | 40.3 | 8.7 | 2007-6-11 | 1.122 |
50 | 92.545 | 52.3 | 40.3 | 10.3 | 2007-6-12 | 1.127 |
50 | 95.411 | 52.3 | 40.3 | 9.2 | 2007-6-12 | 1.162 |
50 | 95.75 | 49.2 | 40.3 | 7.8 | 2007-6-13 | 1.166 |
30 | 93.949 | 27.6 | 40.5 | 8.5 | 2007-6-13 | 1.145 |
30 | 93.124 | 30.7 | 40.3 | 7.3 | 2007-6-14 | 1.135 |
30 | 95.837 | 30.6 | 40.3 | 8.2 | 2007-6-14 | 1.167 |
1. 透氧量单位：cm3/m2·24h·0.1MPa
2. P 渗透系数单位：cm3·cm/cm2·s·cmHg
本次试验获得的数据重复性还是很好的，但是个别材料由于试样厚度均匀性不好也造成了透气量的波动，例如PA（35μm）。分析试验数据可获得明确的结论，即压差法中压力差的存在并没有对材料的结构产生破坏，压力差的存在以及变化确实没有对试样的透气量和透气系数产生影响。
本次试验中对于不同厚度的同种材料也进行了数据对比，这里对PC（125μm）和PC（175μm）的透气量与试样两侧压力差之间的关系、以及PET（12μm）、PET（23μm）、PET（25μm）、PET（70μm）的渗透系数与试样两侧压力差之间的关系进行了对比，参见图1、图2。分析图1、图2也可以明显看出压差法中压力差的存在以及变化对于试样透气量以及渗透系数的检测没有影响。
图1
透氧量单位：cm3/m2·24h·0.1Mpa
图2
渗透系数单位：（E-12）cm3·cm/cm2·s·cmHg
3．总结
通过以上实测数据可知压力差的存在对试样的性能没有任何的影响。为了得到更科学、更全面的结论，目前兰光实验室还在进行更宽范围内的试验验证。
数据的稳定性与设备的精度、重复性、可靠性、试验条件、试样状态、试验操作水平等条件有着密切的关系，没有经过客观、科学、全面的试验就不能下结论。当然随意想象等压法没有压力差就不会影响试验数据，而压差法有压力差就一定影响试验数据的做法就显得更加荒谬了。
