Sound-absorbing material and its preparation method
A technology of sound-absorbing material and white material is applied in the field of sound-absorbing material in the field of sound-absorbing material design, which can solve the problems of general sound-absorbing effect, and achieve the effect of good sound-absorbing effect, convenient operation and better sound-absorbing effect.
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[0070] The steps of a method for preparing a sound-absorbing material are as follows:
[0071] 1. Mix 52 parts of polyether polyol 330N, 28 parts of polyether polyol 3630, 3.8 to 4.7 parts of deionized water, 1 to 2.7 parts of triethanolamine, 5 parts of fluorodichloroethane, 0.9 parts of catalyst A1 and Put 0.9 parts of silicone oil in a plastic cup and mix thoroughly, then stir with a rotary stirrer at a speed of 1200rpm for 60s;
[0072] 2. Add 28.8 parts of isocyanate MDI to the mixture obtained in step 1, and mix thoroughly again for 7-8 seconds;
[0073] 3. Quickly pour the mixture obtained in step 2 into 150×150×60mm 3 In the rectangular parallelepiped mould, perform closed mold foaming, put it in a 50°C constant temperature box, and cure for 2 hours;
[0074] 4. Continue curing at room temperature for 24 hours to obtain a sound-absorbing material.
Embodiment 1
[0077] The components and parts by mass of the sound-absorbing material are:
[0078] 52 parts of polyether polyol 330N, 28 parts of polyether polyol 3630, 28.8 parts of isocyanate MDI, 0.9 part of catalyst A1, 0.9 part of silicone oil, 1 part of triethanolamine and deionized water with different mass parts.
[0079]1. Take 4 groups of the same components and content, that is, each group is 28 parts of polyether polyol 3630, 52 parts of polyether polyol 330N, 0.9 part of catalyst A1, 0.9 part of silicone oil, and 1 part of triethanolamine, and place them in 4 plastics in sequence. Mix well in the cup;
[0080] 2. Take 3.8 parts, 4.1 parts, 4.4 parts, and 4.7 parts of deionized water respectively and add them to the 4 plastic cups in step 1 in turn, mix each fully and stir with a rotary mixer at 1200rpm for 60s;
[0081] 3. Add 28.8 parts of isocyanate MDI to 4 plastic cups respectively, stir the mixture evenly for 7-8 seconds and pour the volume into 150×150×60mm 3 In the cu...
Embodiment 2
[0087] The components and parts by mass of the sound-absorbing material are:
[0088] 52 parts of polyether polyol 330N, 28 parts of polyether polyol 3630, 0.9 part of catalyst A1, 0.9 part of silicone oil, 1 part of triethanolamine, 5 parts of 141.B foaming agent and deionized water with different mass parts.
[0089] 1. Take 4 groups of the same components and content, that is, each group is 52 parts of polyether polyol 330N, 28 parts of polyether polyol 3630, 0.9 part of catalyst, 0.9 part of silicone oil, 1 part of triethanolamine and 5 parts of 141.B in order Place in 4 plastic cups and mix well;
[0090] 2. Take 3.8 parts, 4.1 parts, 4.4 parts, and 4.7 parts of deionized water respectively and add them to the 4 plastic cups in step 1 in turn, mix each fully and stir with a rotary mixer at 1200rpm for 60s;
[0091] 3. Add 28.8 parts of isocyanate MDI to 4 plastic cups respectively, stir the mixture evenly for 7-8 seconds and pour the volume into 150×150×60mm 3 In the cu...
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