Wood fiber-coir fiber composite sound-absorbing material and preparation method thereof

A sound-absorbing material and wood fiber technology, applied in wood treatment, wood impregnation, impregnated wood, etc., can solve the problem that the sound absorption performance cannot meet the expected requirements, and achieve improved sound absorption effect, increased void ratio, and best sound absorption performance Effect

Active Publication Date: 2022-03-22
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To sum up, the present invention aims to propose a fiber sound-absorbing material and a preparation process that does not use polyester fiber at all and has good sound-absorbing performance, so as to solve the problem of completely replacing polyester fiber existing in the prior art. The technical problem that the sound absorption performance cannot meet the expected requirements

Method used

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  • Wood fiber-coir fiber composite sound-absorbing material and preparation method thereof
  • Wood fiber-coir fiber composite sound-absorbing material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] The embodiment of the present invention provides a method for preparing wood fiber-coconut fiber composite sound-absorbing material, comprising steps:

[0042] S101, taking wood fiber and coconut fiber, according to the mass ratio of wood fiber and coconut fiber is (1-9): 1 ratio, put wood fiber and coconut fiber into a mixer.

[0043] That is, 1 to 9 parts by mass of wood fiber corresponds to 1 part by mass of coconut fiber, and the quality of coconut fiber accounts for 10% to 50% of the total mass of coconut fiber and wood fiber.

[0044] S102, taking urea-formaldehyde resin glue, the amount of which is 5% to 12% of the sum of the mass of wood fiber and coconut fiber.

[0045] S103, adding a curing agent to the urea-formaldehyde resin glue, the amount of the curing agent added is 1% of the mass of the urea-formaldehyde resin glue.

[0046] S104, adding a foaming agent in an amount of 16% to 48% of the mass of the urea-formaldehyde resin glue to obtain a glue solution...

Embodiment 2

[0051] Embodiment 2 of the present invention is another embodiment of the preparation method of wood fiber-coir fiber composite sound-absorbing material, and this embodiment comprises steps:

[0052] S201, taking wood fiber and coconut fiber, according to the mass ratio of wood fiber and coconut fiber is 9:1, that is, the mass of coconut fiber accounts for 10%, put the wood fiber and coconut fiber into the mixer.

[0053] S202, get urea-formaldehyde resin glue, and the sizing amount is 5% of the sum of wood fiber and coconut fiber quality;

[0054] S203, adding a curing agent to the urea-formaldehyde resin glue, the amount of the curing agent added is 1% of the mass of the urea-formaldehyde resin glue.

[0055] Preferably, in this embodiment, the curing agent is ammonium chloride.

[0056] S204, then adding zinc oxide and azodicarbonamide as a foaming agent, adding the foaming agent, the amount of the foaming agent added is 16% to 48% of the quality of the urea-formaldehyde r...

Embodiment 3

[0061] Embodiment 3 of the present invention is another embodiment of the preparation method of wood fiber-coir fiber composite sound-absorbing material, and this embodiment comprises steps:

[0062] S301, the wood fiber is placed in a sodium hydroxide solution for alkali extraction treatment.

[0063] The concentration of sodium hydroxide is 0.5%-2%; the extraction temperature is 60°C-100°C; the extraction time is 30min-3h. Then put it into an oven for drying, the drying temperature is 120-130 degrees, and the drying time is 6-8 hours.

[0064] S302, putting the coconut fiber into an oven with a drying temperature of 100-110° C. to dry for 30-60 minutes. When the drying is completed and taken out, the fibers are relatively dispersed and there is no longer aggregation.

[0065] S303, taking wood fiber and coconut fiber, according to the ratio of the mass ratio of wood fiber and coconut fiber being 4:1, that is, the mass of coconut fiber accounts for 25%, put the wood fiber an...

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Abstract

The invention proposes a wood fiber-coir fiber composite sound-absorbing material and a preparation method thereof. The method comprises the steps of: taking wood fiber and coconut fiber and putting them into a mixer; taking urea-formaldehyde resin glue, adding a curing agent to the urea-formaldehyde resin glue, and then adding Foaming agent to obtain glue; add the glue to the mixer, and mix the wood fiber, coconut fiber and glue evenly by stirring; after mixing, put it into the mold for paving and pre-pressing, and then send it into the The hot press is hot pressed to obtain a composite material board with sound-absorbing properties. The composite sound-absorbing material includes evenly mixed wood fiber, coconut fiber, urea-formaldehyde resin glue, curing agent and foaming agent. The present invention uses natural coconut fiber and wood fiber to mix, and the raw materials are renewable materials, which are environmentally friendly and pollution-free; zinc oxide is used as a modifier to improve azodicarbonamide as a foaming agent, so that wood fiber-coir fiber is compounded The sound absorption performance of the material is improved.

Description

technical field [0001] The invention relates to the technical field of sound-absorbing materials, in particular to a wood fiber-coir fiber composite sound-absorbing material and a preparation method thereof. Background technique [0002] The use of sound-absorbing materials is an effective way to reduce noise. Fiber-based sound-absorbing materials are widely used in production and life because of their high porosity and wide sources. At present, fiber sound-absorbing materials are mostly processed by chemical synthetic fibers such as polyester fibers, with polyester fibers and other chemical synthetic fibers as the main raw materials, and polyester fibers are chemical synthetic materials extracted from petroleum, processing energy consumption and pollution larger. [0003] The paper "Preparation Process and Sound Absorption Performance of Wood Fiber / Polyester Fiber Composite Materials" proposed a plan to use wood fiber to replace part of polyester fiber. Although the use of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27N3/00B27N3/04B27N3/08B27N1/02B27N1/00B27K3/02B27K3/20B27K3/00C08J9/10C08L97/02C08L61/24C08K3/22
CPCC08J9/0066C08J9/103B27K3/005B27K3/02B27K3/20B27N1/00B27N1/0227B27N3/002B27N3/04B27N3/08C08J2461/24C08J2397/02C08J2203/04B27K2200/15B27K2240/15
Inventor 朱晓冬刘玉李玉杰王巍聪
Owner NORTHEAST FORESTRY UNIVERSITY
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