Pbt material for low emission automobile air conditioner air outlet blade and preparation method thereof

Abstract

The invention provides a low-emission automotive air conditioner air outlet blade PBT material and a preparation method thereof. The low-emission automotive air conditioner air outlet blade PBT material is composed of, by weight part, 100 parts of polybutylene terephthalate, 40-100 parts of glass fiber, 0-40 parts of polyethylene terephthalate, 2-5 parts of polyethyleneimine, 6-8 parts of cyclic butylene terephthalate and 1-2 parts of antioxygen. The preparation method of the low-emission automotive air conditioner air outlet blade PBT material comprises weighing out the raw materials by weight part above, mixing the raw materials inside a high-speed mixer and then extruding the raw materials through a double-screw extruder, passing the extruded materials through a head piece washing and drying device, and performing pelletizing through a pelletizer to obtain the low-emission automotive air conditioner air outlet blade PBT material. The low-emission automotive air conditioner air outlet blade PBT material is excellent in emission property and applicable to polyester materials for automotive air conditioner air outlet blades, and achieves an odor level up to 3.5 according to Volkswagen test PV3900 and TVOC (total volatile organic compound) emission lower than 20 according to Volkswagen test PV3341, which is far lower than that of common reinforcing PBT materials.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a PBT material for low-emission automobile air conditioner air outlet blades and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (English name Polybutylene Terephthalate, referred to as PBT) is milky white translucent to opaque, crystalline thermoplastic polyester. It has excellent electrical properties, high heat resistance, toughness, fatigue resistance, self-lubrication, low coefficient of friction, weather resistance, low water absorption, and maintains various physical properties (including electrical properties) in a humid environment. Good, so it is widely used as engineering plastics in automobiles, electronic and electrical components. [0003] However, in the prior art, there is no report on the PBT material with low emission. This is mainly because, at present, for low-emission resin materials, the method of adding solvents such...

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Problems solved by technology

For example, Chinese patents CN103709704B and CN103724799B add high-melt foaming jellyfish particles as an air stripping agent to improve the emission characteristics of PC / ABS alloy materials and PP; The emission characteristics of PC / ABS alloy; and the sensitivity of PBT to solvents such as water and alcohols due to its own ester group, after adding such substances, it is very easy to degrade, not only the performance of the material is significantly reduced, but also the content of small molecular substances is extremely high increased, the emission performance decreased significantly

Or by adding an adsorbent, the odor and small molecules of TVOC are adsorbed on the adsorbent, thereby reducing the emission level of the material. For example, Chinese patents CN101760010 B and CN105385152A respectively use hydrophobic odor adsorbent and clay or molecular sieves as adsorbents. Reduce the emission characteristics of polyamide, and reduce the emission characteristics of the material by adsorption. In the subsequent injection molding process of plastics, due to the high temperature and the strong shearing effect of the injection molding machine, it is very easy to make the adsorbed small molecules devolatilize, thus affecting The emission characteristics of the product have no practical application value

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