A method for preparing multi-wall weather-resistant plant fiber reinforced air duct

A plant fiber and plant fiber material technology, which is applied in the field of preparation of multi-wall weather-resistant plant fiber reinforced air ducts, can solve the problems of poor water resistance and easy dust accumulation, and achieve improved bonding performance, increased strength, and toughened strength Effect

Active Publication Date: 2021-11-16
INT CENT FOR BAMBOO & RATTAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the material has poor water resistance and is prone to dust accumulation, so the current market applications are gradually decreasing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of the multi-wall weather-resistant plant fiber reinforced air duct of the present embodiment is as follows:

[0029] S1. Preparation of modified plant fibers: After crushing plant fiber materials into plant fibers with a length of 0.5 mm to 2 mm, immerse them in an alkaline solution with a temperature of 38 ° C to 42 ° C and a mass fraction of 3% for 60 minutes, and then rinse with water After 5 times, dry at a temperature of 90°C so that the water content of the plant fiber is ≤10%, and then spray a coupling agent aqueous solution with a mass fraction of 5% on the plant fiber, disperse and dry, and obtain the water content ≤10% modified plant fiber; the alkaline solution is an aqueous calcium hydroxide solution; the mass ratio of the dried plant fiber to an aqueous coupling agent solution with a mass fraction of 5% is 1:1; the aqueous coupling agent solution The coupling agent in is silane coupling agent KH560; The plant fiber material is wood; ...

Embodiment 2

[0037] The preparation method of the multi-wall weather-resistant plant fiber reinforced air duct of the present embodiment is as follows:

[0038] S1. Preparation of modified plant fibers: After crushing plant fiber materials into plant fibers with a length of 2 mm to 5 mm, immerse them in an alkaline solution with a temperature of 38 ° C to 42 ° C and a mass fraction of 4% for 45 minutes, and then rinse with water for 3 After the second time, dry under the condition of temperature of 100 ℃, so that the water content of the plant fiber is ≤10%, and then spray a coupling agent aqueous solution with a mass fraction of 5% on the plant fiber, disperse and dry, and obtain a water content of ≤10%. 10% modified plant fiber; the alkali solution is an aqueous calcium hydroxide solution; the mass ratio of the dried plant fiber and the aqueous coupling agent solution with a mass fraction of 5% is 1:1.2; in the aqueous coupling agent solution The coupling agent is silane coupling agent K...

Embodiment 3

[0045] The preparation method of the multi-wall weather-resistant plant fiber reinforced air duct with mute function in this embodiment is as follows:

[0046] S1. Preparation of modified plant fibers: After crushing plant fiber materials into plant fibers with a length of 2 mm to 5 mm, immerse them in an alkaline solution with a temperature of 48 ° C to 52 ° C and a mass fraction of 2% for 60 minutes, and then rinse with water for 4 After the first time, dry it at a temperature of 95°C so that the water content of the plant fiber is ≤10%, and then spray an aqueous coupling agent solution with a mass fraction of 5% on the plant fiber, disperse and dry it, and obtain a water content of ≤10%. 10% modified plant fiber; the alkali solution is an aqueous solution of sodium hydroxide; the mass ratio of the dried plant fiber and the aqueous coupling agent solution with a mass fraction of 5% is 1:1.2; in the aqueous coupling agent solution The coupling agent is silane coupling agent K...

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Abstract

The invention provides a method for preparing a multi-wall weather-resistant plant fiber reinforced air duct. The method comprises: mixing and emulsifying different proportions of modified plant fibers and phenolic foaming materials to obtain surface and core fiber foaming materials, Layer-by-layer paving to obtain a plant fiber reinforced foam insulation layer; then pave the outer isolation layer, plant fiber reinforced foam insulation layer, moisture-proof layer, and sealing layer in sequence, and spray a coupling agent between layers during paving, Vinyl resin is then brushed, and then fiber-based plasticized adhesive is paved on the next layer, and finally a multi-wall weather-resistant plant fiber reinforced air duct is obtained; an additional insulation layer is added between the outer isolation layer and the plant fiber reinforced foam insulation layer. The mute buffer layer increases the mute performance; or a phase change layer is added between the plant fiber reinforced foam insulation layer and the moisture-proof layer to increase the energy-saving performance. The multi-wall weather-resistant plant fiber reinforced air duct prepared by the invention has good thermal insulation performance, light weight, good flame retardancy and good breakage resistance.

Description

technical field [0001] The invention belongs to the technical field of air ducts, and in particular relates to a preparation method of multi-wall weather-resistant plant fiber reinforced air ducts. Background technique [0002] At present, the air ducts used in high-rise buildings mainly include: galvanized thin steel air ducts, glass fiber reinforced plastic air ducts and composite thermal insulation air ducts. These three types of air ducts have different characteristics during use. Among them, the galvanized thin steel air duct has high mechanical strength and low cost, but the metal material has high density, high quality, and poor sound insulation effect. It needs to install a muffler. At the same time, the metal material has poor corrosion resistance, is easy to rust, and the construction process is relatively complicated. It has gradually been adopted. disuse. FRP air ducts are prefabricated by hand, connected by flanges, have high fire resistance and corrosion resis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/30B29C70/54C08L61/06C08L97/02C08J9/14C08J5/06C09J197/02C09J11/04C09J11/06
CPCB29C70/30B29C70/54C08J5/06C08J9/0085C08J9/009C08J9/141C08J2203/14C08J2203/182C08J2361/06C08J2497/02C08K2003/0806C08K2201/011C09J11/04C09J11/06C09J197/02C08K13/02C08K3/08C08K5/175
Inventor 程海涛张文福顾少华郑海军王戈
Owner INT CENT FOR BAMBOO & RATTAN
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