CN102876063A - Composite wood-based sound absorbing material, and production method thereof - Google Patents

Composite wood-based sound absorbing material, and production method thereof Download PDF

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Publication number
CN102876063A
CN102876063A CN2012103480020A CN201210348002A CN102876063A CN 102876063 A CN102876063 A CN 102876063A CN 2012103480020 A CN2012103480020 A CN 2012103480020A CN 201210348002 A CN201210348002 A CN 201210348002A CN 102876063 A CN102876063 A CN 102876063A
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China
Prior art keywords
wood
sound absorbent
composite wood
trevira
composite
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CN2012103480020A
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Chinese (zh)
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CN102876063B (en
Inventor
彭立民
傅峰
梁善庆
陈志林
卢克阳
林兰英
陆军
王军锋
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中国林业科学研究院木材工业研究所
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Priority to CN201210348002.0A priority Critical patent/CN102876063B/en
Publication of CN102876063A publication Critical patent/CN102876063A/en
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Publication of CN102876063B publication Critical patent/CN102876063B/en

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Abstract

The invention provides a composite wood-based sound absorbing material which comprises wood fiber and polyester fiber at weight ratio of 1:1-1:5, a foaming agent, and binder for bonding the wood fiber and polyester fiber. The material has density of 0.2-0.4 g/cubic centimeter, porosity of 0.6-0.85, thickness of 8-20 mm, sound absorbing coefficient of 0.8 or above) better than that of ordinary sound absorbing artificial board, and lower production cost than that of polyester fiber sound absorbing artificial board. Flame-retardant sound absorbing material can be obtained by adding flame retardant into the wood fiber. The invention also discloses a production method of the sound absorbing material.

Description

A kind of composite wood sound absorbent material and manufacture method thereof

Technical field

The present invention relates to a kind of sound absorbent material, particularly a kind of xylon-trevira composite sound-absorbing material.

Background technology

China's Wooden sound-absorbing material has obtained rapidly development in recent years, and according to statistics, the Wooden sound-absorbing material yield in our every year reaches 1,000 ten thousand m 2More than.Lightweight wood-fiber board and polyester fibre acoustic panel are two kinds of more common acoustic panels, the lightweight wood-fiber board is that density is at the fiberboard below 0.4 g/cc, low and the porous of this acoustic panel density, have good sound-absorbing and heat-proof quality, be mainly used in the sound-absorbing structure of senior building (such as theater etc.).The sound absorbing coefficient NRC of this type of acoustic panel can reach 0.5-0.7.But it is relatively poor that wood fibre board has moistureproofness, and intensity is low; And fiberboard glue amount is larger, not environmental protection.Polyester fibre acoustic panel is to be formed by the trevira mold pressing, polyester fibre acoustic panel is a kind of porous material, material internal has the hole of small in a large number connection, sound wave can go deep into material internal along these holes, with material generation rubbing effect acoustic energy is converted into heat energy, genus polyporus sound-absorbing material, sound absorption characteristics are that the sound absorption coefficient that increases along with frequency increases gradually.But the trevira price is higher, and belongs to Chemicals, is the product of non-reusable edible.

Summary of the invention

Problem for prior art exists the object of the present invention is to provide a kind of composite wood sound absorbent material of being made by xylon and trevira, and this kind attractive material lightweight, porous all have good assimilation effect to the high and low frequency sound wave.The invention also discloses the making method of above-mentioned compound attractive material.

For achieving the above object, a kind of composite wood sound absorbent material of the present invention comprises wood fibre, trevira, whipping agent and sizing agent; The ratio of described wood fibre and trevira is 1:1-1:5; Bonding compound by sizing agent; The density of described composite wood attractive material is 0.2g/cm3-0.4 g/cm3, and porosity is 0.6-0.85, and thickness is 8mm-20mm.

Further, described sizing agent is phenolic resin adhesive, is that 100 parts (weight) is calculated by wood fibre and trevira total amount, and described sizing agent is 8-12 parts (weight).

Further, the length of described trevira is 4mm-8mm, and diameter is 10um-40um, and cross-sectional shape is circle, trilateral or dendriform.

Further, described wood fiber bundle length 10mm-20mm, diameter is 250um-1000um.

Further, described whipping agent is Cellmic C 121, supercarbonate, the diisopropyl azodiformate of low temperature modification.

Further, also have fire retardant in the described wood composite sound absorbent material, described fire retardant is inorganic combustion inhibitor, organic fire-retardant or the mixture of the two.

The making method of above-mentioned composite wood sound absorbent material is characterized in that, concrete steps are:

1), wood fibre, trevira, whipping agent and sizing agent are put into mould by preset proportion, fully mixes in the mode of air mixed, make blank;

2), adopt to mix mould pressing technology the blank in the described step 1 carried out hot pressing, making density is 0.2g/cm3-0.4 g/cm3, porosity is 0.6-0.85, thickness is the sheet material of 8mm-20mm.

Further, the whipping agent that adds in the described step 1 is Cellmic C 121, supercarbonate diisopropyl azodiformate, and sizing agent is phenolic resin adhesive.

Further, the pressure of the hot pressing in the described step 2 is 1-3Mpa, and be 0.5-5min clamping time; Described Heating temperature is higher than the blowing temperature of the whipping agent that uses.

Further, also comprise the fire retardant that adds preset proportion in the step 1.

This composite wood sound absorbent material disclosed in this invention uses xylon to make with trevira is compound, increase in sound absorption qualities than common sound-absorbing wood-based plate, sound absorbing coefficient can reach 0.8 reach more than; And reduced cost of manufacture than trevira sound-absorbing wood-based plate; And can add fire retardant at xylon and make the sound absorbent material with flame retardant properties.In addition, the invention also discloses the making method of above-mentioned sound absorbent material, the method is simple, and is time saving and energy saving.

Embodiment

Composite wood sound absorbent material among the present invention is composited by wood fibre and the trevira ratio in 1:1-1:5.The length of trevira is 4mm-8mm, and diameter is 10um-40um, and cross-sectional shape is circle, trilateral, dendriform, and fibrous texture is solid or hollow; Wood fiber bundle length 10mm-20mm, diameter are 250um-1000um; The density range of composite wood sound absorbent material is 0.2 g/cc-0.4 g/cc, and porosity is 0.6-0.85, and thickness range is 8mm-20mm.

Adopt the making step of above-mentioned composite wood sound absorbent material to be:

1, wood fibre, trevira whipping agent and sizing agent are put into mould by preset proportion, fully mix in the mode of air mixed, make blank; Wherein, sizing agent can adopt phenolic resin adhesive, the glutinous agent of melamine resin adehsive or the agent of isocyanic ester gluing, the ratio of sizing agent adopts 8%-12%(in the relative bone dry fiber quality of solid resin quality) ratio carry out, ratio is the whipping agent of the 8%-12% Cellmic C 121 that can be low temperature modification, supercarbonate, diisopropyl azodiformate etc.Wherein, the Cellmic C 121 of low temperature modification decomposes peak temperature and is about 138 ℃; Supercarbonate, take sodium bicarbonate as example, decomposition temperature is 60 ℃-150 ℃; The diisopropyl azodiformate decomposition temperature is about 100 ℃.

2, adopt the mixing mould pressing technology that the blank in the step 1 is carried out hot pressing, making thickness is 8 mm-20mm acoustic panel.The pressure that hot pressing in this step is adopted, clamping time can be set according to making sheet metal thickness, are generally 1-3Mpa, and be 0.5-5min clamping time; And according to the whipping agent kind that adopts, set the hot pressing Heating temperature.For example, the whipping agent of selecting is the low temperature modification Cellmic C 121, and sizing agent is phenolic resin adhesive, and the unit pressure of compacting is 1.5Mpa, and be 1mm/min clamping time, and hot pressing temperature is 150 ℃.Compacting can adopt roll squeezer or other press to finish.

3, according to real needs to cutting out through the sheet material after the roll-in; Make the porousness sound absorbent material of all size.

Composite wood sound absorbent material among the present invention carries out the mensuration of sound absorbing coefficient by standing wave tube to sound absorbent material, and sound absorbing coefficient NRC can reach 0.8, and sound absorption qualities obviously is better than at present generally two kinds of sound absorbent materials of employing of institute.

In addition, the xylon in the composite wood sound absorbent material adds fire retardant and makes the sound absorbent material with flame retardant properties.The fire retardant that adds can be inorganic combustion inhibitor, organic fire-retardant or the mixture of the two, should be in step 1 and the other materials blend.Inorganic combustion inhibitor is: aluminium hydroxide, magnesium hydroxide, monoammonium phosphate, diammonium phosphate, ammonium chloride, borate etc., organic fire-retardant is: halogen system, phosphoric acid ester, halogenated phosphate etc.As add the melamine phosphate fire retardant, above-mentioned sound absorbent material can be made the sound-absorbing and flame-retardant material.

Claims (10)

1. a composite wood sound absorbent material is characterized in that, described composite wood sound absorbent material comprises wood fibre, trevira, whipping agent and sizing agent; The ratio of described wood fibre and trevira is 1:1-1:5(weight); Bonding compound by sizing agent; The density of described composite wood attractive material is 0.2g/cm 3-0.4 g/cm 3, porosity is 0.6-0.85, thickness is 8mm-20mm.
2. described composite wood sound absorbent material according to claim 1 is characterized in that described sizing agent is phenolic resin adhesive, is that 100 parts (weight) is calculated by wood fibre and trevira total amount, and described sizing agent is 8-12 parts (weight).
3. described composite wood sound absorbent material according to claim 1 is characterized in that the length of described trevira is 4mm-8mm, and diameter is 10um-40um, and cross-sectional shape is circular, trilateral or dendriform.
4. described composite wood sound absorbent material according to claim 1 is characterized in that, described wood fiber bundle length 10mm-20mm, and diameter is 250um-1000um.
5. described composite wood sound absorbent material according to claim 4 is characterized in that described whipping agent is Cellmic C 121, supercarbonate, the diisopropyl azodiformate of low temperature modification, and foaming agent consumption is 8%-12%.
6. described composite wood sound absorbent material according to claim 1 is characterized in that also having fire retardant in the described wood composite sound absorbent material, and described fire retardant is inorganic combustion inhibitor, organic fire-retardant or the mixture of the two.
7. the making method of described composite wood sound absorbent material according to claim 1 is characterized in that concrete steps are:
1), wood fibre, trevira, whipping agent and sizing agent are put into mould by preset proportion, fully mixes in the mode of air mixed, make blank;
2), adopt to mix mould pressing technology the blank in the described step 1 carried out hot pressing, making density is 0.2g/cm 3-0.4 g/cm 3, porosity is 0.6-0.85, thickness is the sheet material of 8mm-20mm.
8. described method according to claim 7 is characterized in that the whipping agent that adds in the described step 1 is Cellmic C 121, supercarbonate diisopropyl azodiformate, and sizing agent is phenolic resin adhesive.
9. described method according to claim 8 is characterized in that the pressure of the hot pressing in the described step 2 is 1-3Mpa, and be 0.5-5min clamping time; Described Heating temperature is higher than the blowing temperature of the whipping agent that uses.
10. described method according to claim 7 is characterized in that, also comprises the fire retardant that adds preset proportion in the step 1.
CN201210348002.0A 2012-09-19 2012-09-19 Composite wood-based sound absorbing material, and production method thereof CN102876063B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105237033A (en) * 2015-09-06 2016-01-13 歌尔声学股份有限公司 Preparation method of sound absorbing material, the sound absorbing material and filling method of same
CN105623200A (en) * 2016-02-17 2016-06-01 江苏瑞赛恩建材实业有限公司 Sound absorption plate with long service life
CN106497112A (en) * 2016-10-11 2017-03-15 常州市鼎升环保科技有限公司 A kind of preparation method of anti-corrosion moisture resistance Plant fiber's acoustic board
CN106867209A (en) * 2016-12-29 2017-06-20 安徽鸿润装饰材料有限公司 A kind of PET acoustic tiles and preparation method thereof
WO2017114304A1 (en) * 2015-12-30 2017-07-06 王丽萍 Durable construction fiberboard
CN107083074A (en) * 2017-06-04 2017-08-22 李家友 A kind of preparation method of the ageing-resistant acoustic tile based on alkali lignin base
CN108202376A (en) * 2018-01-03 2018-06-26 中山市大涌镇生产力促进中心 A kind of lighting solid wood profile and its manufacturing method
CN109732017A (en) * 2019-01-10 2019-05-10 中铁北京工程局集团有限公司 A kind of Noise Suppression Device in steel bar stretching

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110114414A1 (en) * 2009-06-12 2011-05-19 Precision Fabrics Group, Inc. Acoustically tunable sound absorption articles and methods of making same
CN202292954U (en) * 2011-10-27 2012-07-04 昆山吉美川纤维科技有限公司 System for preparing polyester fiber plant fiberboard

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110114414A1 (en) * 2009-06-12 2011-05-19 Precision Fabrics Group, Inc. Acoustically tunable sound absorption articles and methods of making same
CN202292954U (en) * 2011-10-27 2012-07-04 昆山吉美川纤维科技有限公司 System for preparing polyester fiber plant fiberboard

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105237033A (en) * 2015-09-06 2016-01-13 歌尔声学股份有限公司 Preparation method of sound absorbing material, the sound absorbing material and filling method of same
CN105237033B (en) * 2015-09-06 2018-11-30 歌尔股份有限公司 Sound-absorbing material preparation method, sound-absorbing material and its fill method
WO2017114304A1 (en) * 2015-12-30 2017-07-06 王丽萍 Durable construction fiberboard
CN105623200A (en) * 2016-02-17 2016-06-01 江苏瑞赛恩建材实业有限公司 Sound absorption plate with long service life
CN106497112A (en) * 2016-10-11 2017-03-15 常州市鼎升环保科技有限公司 A kind of preparation method of anti-corrosion moisture resistance Plant fiber's acoustic board
CN106867209A (en) * 2016-12-29 2017-06-20 安徽鸿润装饰材料有限公司 A kind of PET acoustic tiles and preparation method thereof
CN107083074A (en) * 2017-06-04 2017-08-22 李家友 A kind of preparation method of the ageing-resistant acoustic tile based on alkali lignin base
CN108202376A (en) * 2018-01-03 2018-06-26 中山市大涌镇生产力促进中心 A kind of lighting solid wood profile and its manufacturing method
CN109732017A (en) * 2019-01-10 2019-05-10 中铁北京工程局集团有限公司 A kind of Noise Suppression Device in steel bar stretching

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