A kind of foam pad and preparation method thereof
A foam pad and foam technology, which is applied in the high security field, can solve the problems such as the need for further improvement of sealing performance.
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Embodiment 1
[0069] A foam pad, the foam pad includes a base layer and a film layer covering the upper surface and the lower surface of the base layer, the base layer is a foam, and is a uniform pore-like body, the average diameter of the pores is is 1-30 μm; the film layer is a coating layer, and the film layer is uniform and dense; the thickness of the base layer is 0.5mm; the thickness of the film layer is 0.02mm;
[0070] The base layer is mainly prepared from the following raw materials in terms of mass percentage:
[0071]
[0072] The release agent is selected from oleic acid amide;
[0073] The nucleating agent is selected from masterbatches with sodium bicarbonate and citric acid as the main active ingredients and PE, PP or EVA as the carrier.
[0074] The film layer is mainly prepared from the following raw materials according to the mass percentage:
[0075]
[0076] The tackifier is selected from EEA (ethylene ethyl acrylate).
[0077] The release agent is selected fro...
Embodiment 2
[0083] A foam pad, the foam pad includes a base layer and a film layer covering the upper surface and the lower surface of the base layer, the base layer is a foam, and is a uniform pore-like body, the average diameter of the pores is 50-100 μm; the film layer is a coating layer, and the film layer is uniform and dense; the thickness of the base layer is 10.0mm; the thickness of the film layer is 0.15mm;
[0084] The base layer is mainly prepared from the following raw materials in terms of mass percentage:
[0085]
[0086] The release agent is selected from oleamide and erucamide.
[0087] Preferably, the nucleating agent is selected from masterbatches with sodium bicarbonate and citric acid as the main active ingredients and PE, PP or EVA as the carrier.
[0088] The film layer is mainly prepared from the following raw materials according to the mass percentage:
[0089]
[0090]
[0091] The tackifier is selected from EEA and polyester.
[0092] The mold releas...
Embodiment 3
[0098] A foam pad, the foam pad includes a base layer and a film layer covering the upper surface and the lower surface of the base layer, the base layer is a foam, and is a uniform pore-like body, the average diameter of the pores is 30-80 μm; the film layer is a coating layer, and the film layer is uniform and dense; the thickness of the base layer is 5.0mm; the thickness of the film layer is 0.10mm;
[0099] The base layer is mainly prepared from the following raw materials in terms of mass percentage:
[0100]
[0101]
[0102] The release agent is selected from erucamide.
[0103] Preferably, the nucleating agent is selected from masterbatches with sodium bicarbonate and citric acid as the main active ingredients and PE, PP or EVA as the carrier.
[0104] The film layer is mainly prepared from the following raw materials according to the mass percentage:
[0105]
[0106] The tackifier is selected from maleic anhydride grafted resins.
[0107] The mold release...
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Abstract
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