Automobile top cover plate
A technology of car roof and plastic layer, applied in vehicle parts, transportation and packaging, superstructure and other directions, can solve problems such as poor sound insulation, and achieve the effect of enhancing sound absorption and noise reduction and reducing noise
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Embodiment 1
[0020] The car roof cover plate of this embodiment comprises an outer plastic layer, a middle layer and an inner sound-absorbing layer;
[0021] The inner sound-absorbing layer is prepared from the following raw materials in parts by weight: 30 parts of polyurethane, 10 parts of polymethylene polyphenyl polyisocyanate, 5 parts of diatomaceous earth, 3 parts of medical stone fiber, 0.5 parts of wear-resistant agent, 0.5 part of oxidant and 1 part of crosslinking agent; wherein the viscosity of the polymethylene polyphenyl polyisocyanate is 1000mpa.s, and the content of medical stone micropowder in the medical stone fiber is 0.5%; the crosslinking The agent is hexahydrophthalic anhydride;
[0022] The preparation method of the inner sound-absorbing layer comprises the following steps:
[0023] A. Add polyurethane, polymethylene polyphenyl polyisocyanate, medical stone fiber, diatomaceous earth, wear-resistant agent, antioxidant and crosslinking agent into the reactor, and stir ...
Embodiment 2
[0031] The car roof cover plate of this embodiment comprises an outer plastic layer, a middle layer and an inner sound-absorbing layer;
[0032] The inner sound-absorbing layer is prepared from the following raw materials in parts by weight: 40 parts of polyurethane, 5 parts of polymethylene polyphenyl polyisocyanate, 8 parts of diatomaceous earth, 8 parts of medical stone fiber, 1 part of wear-resistant agent, 0.3 parts of oxidizing agent and 1.2 parts of crosslinking agent; wherein the viscosity of the polymethylene polyphenyl polyisocyanate is 1050mpa.s, and the content of medical stone micropowder in the medical stone fiber is 0.3%; the crosslinking The agent is hexahydrophthalic anhydride;
[0033] The preparation method of the inner sound-absorbing layer comprises the following steps:
[0034] A. Add polyurethane, polymethylene polyphenyl polyisocyanate, medical stone fiber, diatomaceous earth, wear-resistant agent, antioxidant and crosslinking agent into the reactor, a...
Embodiment 3
[0042] The car roof cover plate of this embodiment comprises an outer plastic layer, a middle layer and an inner sound-absorbing layer;
[0043] The inner sound-absorbing layer is prepared from the following raw materials in parts by weight: 50 parts of polyurethane, 7 parts of polymethylene polyphenyl polyisocyanate, 10 parts of diatomaceous earth, 5 parts of medical stone fiber, 0.7 parts of wear-resistant agent, 0.2 parts of oxidant and 1.5 parts of crosslinking agent; wherein the viscosity of the polymethylene polyphenyl polyisocyanate is 1100mpa.s, and the content of medical stone micropowder in the medical stone fiber is 0.2%; the crosslinking The agent is hexahydrophthalic anhydride;
[0044] The preparation method of the inner sound-absorbing layer comprises the following steps:
[0045] A. Add polyurethane, polymethylene polyphenyl polyisocyanate, medical stone fiber, diatomaceous earth, wear-resistant agent, antioxidant and crosslinking agent into the reactor, and s...
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Abstract
Description
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Application Information
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