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Hollow blow-molded micro-foamed automobile air duct material and preparation method thereof

A micro-foaming and automotive technology, applied in the field of materials, can solve the problems of excessive toxic volatile organic compound VOC, unstable outer EVA foam size, high failure rate of assembly assembly, etc., achieve good long-term thermal aging performance, reduce VOC release amount and the effect of meeting the requirements of VOC standards

Inactive Publication Date: 2018-11-27
NANJING JULONG SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the air duct of automobile air conditioner, the air duct assembly currently on the market is mainly composed of two parts, the main body of the pipe blow-molded by high-density polyethylene and the outer adhesive layer of EVA foam cotton for thermal insulation. Composition, this kind of air conditioning air duct has the following technical problems: 1) the weight is large; 2) the toxic volatile organic compound VOC will seriously exceed the standard through glue bonding; 3) the sound insulation effect of the material is poor, especially when the air conditioner is working, the noise produced The noise is relatively large; 4) Due to the unstable size of the outer EVA foam, the failure rate of the assembly assembly is relatively high

Method used

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  • Hollow blow-molded micro-foamed automobile air duct material and preparation method thereof
  • Hollow blow-molded micro-foamed automobile air duct material and preparation method thereof
  • Hollow blow-molded micro-foamed automobile air duct material and preparation method thereof

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Effect test

Embodiment 1

[0037] A preparation method for hollow blow molding micro-foamed automobile air duct material, comprising the following steps:

[0038] Step 1: Mix 50 parts of high-density polyethylene, 1 part of tert-butyl peroxybenzoate, 10 parts of talcum powder, and 10100.2 parts of antioxidant in a mixer for 1-3 minutes according to certain parts by weight, and add them to the double In a screw extruder, granulate at a temperature of 160-200°C and a screw speed of 200-400r / min to obtain a polyethylene composite material;

[0039] Step 2: Fully mix 1.6 parts of OBSH and 6.4 parts of DPT in a high-mixer in advance, and then add them to the single-screw blow molding machine from the side feeding port; at the same time, the polyethylene composite material, PET Add 30 parts, 1 part of organically modified montmorillonite, 1 part of organic silicone oil, 1 part of EBS, and 2 parts of maleic anhydride graft-modified POE into the single-screw blow molding machine barrel; at a temperature of 150-...

Embodiment 2

[0041] A preparation method for hollow blow molding micro-foamed automobile air duct material, comprising the following steps:

[0042] Step 1: Mix 60 parts of high-density polyethylene, 20 parts of linear low-density polyethylene, 0.5 parts of lauroyl peroxide, 15 parts of calcium carbonate, and 0.5 parts of antioxidant 168 in a mixer for 1-3 minutes according to certain parts by weight , fed into a twin-screw extruder through a hopper, granulated at a temperature of 160-200°C, and a screw speed of 200-400r / min, to obtain a polyethylene composite material;

[0043] Step 2: Fully mix 1 part of OBSH and 9 parts of NTA in a high-mixer in advance, and then feed it into the single-screw blow molding machine from the side feeding port; at the same time, mix 1 part of polyethylene composite material and PET obtained in step 1 , 3 parts of nano-silica, 4 parts of silicone oil, 3 parts of EBS, and 5 parts of maleic anhydride graft-modified POE are added to the barrel of a single-screw...

Embodiment 3

[0045] A preparation method for hollow blow molding micro-foamed automobile air duct material, comprising the following steps:

[0046]Step 1: Mix 60 parts of high-density polyethylene, 0.2 parts of tert-butyl peroxy tert-butyl valerate, and 10100.3 parts of antioxidant in a mixer for 1-3 minutes, and add them to a twin-screw extruder through a hopper. Pelletizing at -200°C, with a screw speed of 200-400r / min, to obtain polyethylene composites;

[0047] Step 2: Fully mix 0.2 parts of p-toluenesulfonylhydrazide and 0.3 parts of NTA in a high-mixer in advance, and then add them to the single-screw blow molding machine from the side feed port; at the same time, the polyethylene composite material obtained in Step 1 , 10 parts of PBT, 2 parts of organically modified montmorillonite, 2 parts of polyethylene glycol ether, 1 part of stearic acid, and 4 parts of maleic anhydride grafted SEBS are added to the single-screw blow molding machine barrel; at 150-200 Blow molding at ℃ tempe...

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Abstract

The invention relates to an automobile air duct and a preparation method, especially to a hollow blow-molded micro-foamed automobile air duct material and a preparation method thereof. The material ofthe invention comprises the following components, by weight: 50-80 parts of polyethylene, 0-15 parts of mineral powder, 1-30 parts of polyester, 0.2-1 part of a tackifier, 0.5-10 parts of a foaming agent, 5-15 parts of a blowing promotor, 0.2-0.5 part of a lubricant, and 0.2-0.5 part of an antioxidant. The invention also discloses the preparation method of the material. The hollow blow-molded micro-foamed automobile air duct has the characteristics of high cell density and good apparent quality. An automobile engine hood product prepared by the material has the characteristics of light weight, good heat insulation effect, good dimensional stability, high yield and the like. Under the condition that the whole weight of the product is reduced by more than 40%, the normal assembly and use ofparts are not affected, and the purpose of lightweight is achieved.

Description

technical field [0001] The invention relates to an automobile air duct material and a preparation method thereof, in particular to a hollow blow molded micro-foaming automobile air duct material and a preparation method thereof, belonging to the field of material technology. Background technique [0002] Under the dual pressure of energy crisis and environmental pollution, lightweight has become an inevitable trend in the development of today's automobile industry. According to relevant research, for every 10% weight loss of a car, the fuel consumption can be reduced by 8% to 10%. However, at present, compared with foreign developed countries, the weight of Chinese cars is 8-10% higher than that of foreign developed countries, and the weight of commercial vehicles is 10-15% higher. To catch up with the world's advanced level, the weight of vehicles needs to be reduced by 25-30%. Therefore, my country's automobile lightweight task is very urgent. [0003] For the air duct o...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08L67/02C08K13/04C08K13/02C08K5/14C08J9/10B29C49/78B29C49/42B29L23/00
CPCB29C49/0015B29C49/42B29C49/786B29L2023/22C08J9/0023C08J9/0061C08J9/009C08J9/0095C08J9/102C08J9/105C08J9/107C08J2203/04C08J2203/18C08J2323/06C08J2423/08C08J2467/02
Inventor 王滨刘曙阳蒋顶军王峰
Owner NANJING JULONG SCI&TECH CO LTD
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