A kind of micro-nano filter layer and its preparation process that can effectively solve peculiar smell and voc

Abstract

The invention discloses a multi-layer composite micro-nano filter layer for automobile interior decoration, which is characterized in that: ① photocatalytic antibacterial layer, ② high-efficiency adsorption layer, ③ fiber bonding layer, ④ thermocatalytic Degradation layer, ⑤ fiber bonding layer, ⑥ high-efficiency adsorption layer and ⑦ surface bonding layer; ① photocatalytic antibacterial layer contains photocatalytic nano-materials; ② high-efficiency adsorption layer contains a mixture of high adsorption powder and polymer powder; ④ thermocatalytic The degradation layer contains a mixture of thermocatalytic degradation powder and polymer powder; the photocatalytic antibacterial layer, the fiber bonding layer and the surface bonding layer all comprise a single-layer fiber net formed by spinning. The invention automatically absorbs the peculiar smell and VOC in the car, avoids secondary pollution caused by desorption during long-term use, and the spinning fiber ensures smooth air flow, avoids the problem of dust pollution caused by activated carbon dusting, and reduces costs.

Description

Technical field [0001] The present invention relates to a micro-nano-filtration layer and a preparation process, and more particularly to a multilayer functional composite material that can effectively solve material odor and VOC problems in automotive interior and its preparation processes. Background technique [0002] In recent years, air quality problems in the car have raised extensive attention, including odor and volatile organic matter (VOC). "Car odor" has become the highest consumer response in the JDPower annual report for two consecutive years. According to the results of automotive testing of environmental experts, 90% of the air quality is unqualified, especially newly produced cars The quality is the worst, about 70% of the new cars exceeds poisonous and harmful volatile organic content, main pollutants are aldehyde, benzene, acetone and other small molecular materials. The narrow "VOC" said by the automotive industry refers to the eight organic volatiles specified...

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Problems solved by technology

For example, the patent CN201530422U proposes a car roof that can purify the air inside the car, which contains an activated carbon fiber adsorption layer, and the decorative surface and the mesh hot-melt adhesive layer are all breathable materials, which can efficiently absorb harmful gases such as formaldehyde and benzene series. However, the cost of activated carbon fiber is high, the adsorption of harmful gases is physical adsorption, there is a phenomenon of desorption at high temperature, and the molding strength is poor, so it is difficult to industrialize

In patents CN 104005112A, CN105059207A, CN104875692A, etc., an adsorption layer or negative ion adhesive layer is added to the structure. The adsorption materials are specifically diatomite, molecular sieve, tourmaline, titanium dioxide and (or) medical stone, etc. The pore size of the above adsorbents is uniform and Fixed, so the adsorption selectivity is strong, and only a small part of specific VOC and odor molecules can be partially removed. At the same time, the above adsorbents have strong water absorption, which affects the adsorption effect of harmful gases such as formaldehyde and benzene series, and is easy to Causes the material to become more hygroscopic, causing bacterial growth and musty odors

[0007] In addition to the ceiling, car interiors such as carpets, coat racks, and spare tire covers all have problems of odor and excessive VOC. Relatively speaking, adding activated carbon to the interior materials for adsorption has a better effect, but it also brings Some problems were identified: (1) The process of adding activated carbon is easy to produce a large amount of dust, which pollutes the workshop environment; (2) After the product is cut, the activated carbon will fall off and pollute the fabric due to weak bonding; (3) If the activated carbon is blown In the process of film or cast film preparation, the activated carbon film is introduced into the interlayer of automobile interior materials in the form of continuous unwinding composite, which can avoid the dust of activated carbon in the process of processing, but the disadvantage is that the pores of activated carbon are in the film. (4) Simple activated carbon can only play an adsorption role, and it is easy to desorb in a high temperature environment, causing secondary pollution

[0008] Therefore, in general, on the premise of taking into account the effect, efficiency and cost, the automotive industry currently does not have a very effective solution to the current automotive interior manufacturing process to effectively solve the problem of automotive interior odor and VOC

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