CN102876063B - Composite wood-based sound absorbing material, and production method thereof - Google Patents
Composite wood-based sound absorbing material, and production method thereof Download PDFInfo
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- CN102876063B CN102876063B CN201210348002.0A CN201210348002A CN102876063B CN 102876063 B CN102876063 B CN 102876063B CN 201210348002 A CN201210348002 A CN 201210348002A CN 102876063 B CN102876063 B CN 102876063B
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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
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 obtains in recent years and develops rapidly, and according to statistics, we reach 1,000 ten thousand m by annual Wooden sound-absorbing material yield
2above.Beaver board and polyester fibre acoustic panel are two kinds of more common acoustic panels, beaver board is the fiberboard of density below 0.4 gram/cc, low and the porous of this acoustic panel density, there is good sound-absorbing and heat-proof quality, be mainly used in the sound-absorbing structure of senior building (as theater etc.).The sound absorbing coefficient NRC of this type of acoustic panel can reach 0.5-0.7.But it is poor that wood fibre board has moistureproofness, intensity is low; And fiberboard glue amount is comparatively large, not environmentally.Polyester fibre acoustic panel is formed by trevira mold pressing, polyester fibre acoustic panel is a kind of porous material, material internal has the hole of connection small in a large number, 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 along with the sound absorption coefficient that increases of frequency increases gradually.But trevira price is higher, and belongs to Chemicals, it is the product of non-reusable edible.
Summary of the invention
For prior art Problems existing, the object of the present invention is to provide a kind of composite wood sound absorbent material be made up of xylon and trevira, this kind of attractive material lightweight, porous, all have good assimilation effect to 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; By the bonding compound of 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, and be that 100 parts (weight) calculates by wood fibre and trevira total amount, 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 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), by wood fibre, trevira, whipping agent and sizing agent put into mould in setting ratio, fully mix in the mode of air mixed, make blank;
2), adopt mixing mould pressing technology to carry out hot pressing to the blank in described step 1, making density is 0.2g/cm3-0.4 g/cm3, and porosity is 0.6-0.85, and thickness is the sheet material of 8mm-20mm.
Further, the whipping agent added in 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 described step 2 is 1-3Mpa, and clamping time is 0.5-5min; Described Heating temperature is higher than the blowing temperature of used whipping agent.
Further, the fire retardant adding setting ratio is also comprised in step 1.
This composite wood sound absorbent material disclosed in this invention uses xylon and trevira compound to make, and increases in sound absorption qualities than common sound-absorbing wood-based plate, sound absorbing coefficient can reach 0.8 and more than; And comparatively trevira sound-absorbing wood-based plate reduces cost of manufacture; And fire retardant can be added make the sound absorbent material with flame retardant properties on xylon.In addition, the invention also discloses the making method of above-mentioned sound absorbent material, the method is simple, time saving and energy saving.
Embodiment
Composite wood sound absorbent material in the present invention is composited in the ratio of 1:1-1:5 by wood fibre and trevira.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 is 250um-1000um; The density range of composite wood sound absorbent material is 0.2 gram/cc-0.4 gram/cc, and porosity is 0.6-0.85, and thickness range is 8mm-20mm.
The making step of above-mentioned composite wood sound absorbent material is adopted to be:
1, wood fibre, trevira whipping agent and sizing agent are put into mould in setting ratio, fully mix in the mode of air mixed, make blank; Wherein, sizing agent can adopt phenolic resin adhesive, melamine resin adehsive sticks agent 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 Cellmic C 121, supercarbonate, diisopropyl azodiformate etc. that the whipping agent of 8%-12% can be low temperature modification.Wherein, the Cellmic C 121 of low temperature modification decomposes peak temperature and is about 138 DEG C; Supercarbonate, for sodium bicarbonate, decomposition temperature is 60 DEG C-150 DEG C; Diisopropyl azodiformate decomposition temperature is about 100 DEG C.
2, adopt mixing mould pressing technology to carry out hot pressing to the blank in step 1, making thickness is 8 mm-20mm acoustic panels.The pressure that hot pressing in this step adopts, clamping time can set according to making sheet metal thickness, and be generally 1-3Mpa, clamping time is 0.5-5min; And according to adopted whipping agent kind, setting hot pressing Heating temperature.Such as, the whipping agent selected is low temperature modification Cellmic C 121, and sizing agent is phenolic resin adhesive, and the unit pressure of compacting is 1.5Mpa, and clamping time is 1mm/min, and hot pressing temperature is 150 DEG C.Compacting can adopt roll squeezer or other press to complete.
3, according to real needs, the sheet material after roll-in is cut out; Make the porousness sound absorbent material of all size.
Composite wood sound absorbent material in the present invention carries out the mensuration of sound absorbing coefficient to sound absorbent material by standing wave tube, sound absorbing coefficient NRC can reach 0.8, and sound absorption qualities is obviously better than the two kinds of sound absorbent materials generally adopted at present.
In addition, the xylon in composite wood sound absorbent material adds fire retardant and make the sound absorbent material with flame retardant properties.The fire retardant added can be inorganic combustion inhibitor, organic fire-retardant or the mixture of the two, should be blended with other materials in step 1.Inorganic combustion inhibitor is: aluminium hydroxide, magnesium hydroxide, monoammonium phosphate, diammonium phosphate, ammonium chloride, borate etc., and organic fire-retardant is: halogen system, phosphoric acid ester, halogenated phosphate etc.As added melamine phosphate fire retardant, above-mentioned sound absorbent material can be made sound-absorbing and flame-retardant material.
Claims (1)
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 part by weight of described wood fibre and trevira is 1:1-1:5; By the bonding compound of sizing agent; Described sizing agent is phenolic resin adhesive, is 100 weight parts by wood fibre and trevira total amount, and described sizing agent is 8-12 weight; Described trevira is hollow structure, and the length of trevira is 4mm-8mm, and diameter is 10um-40um, and cross-sectional shape is circle, trilateral or dendriform; Described wood fiber bundle length 10mm-20mm, diameter is 250um-1000um; Described whipping agent is Cellmic C 121, supercarbonate, the diisopropyl azodiformate of low temperature modification, and foaming agent consumption is 8%-12%; Also have fire retardant in described wood composite sound absorbent material, described fire retardant is inorganic combustion inhibitor, organic fire-retardant or the mixture of the two; By wood fibre, trevira, whipping agent and sizing agent are put into mould in setting ratio, fully mix in the mode of air mixed, make blank; Carry out hot pressing to described blank, the pressure of hot pressing is 1-3Mpa, and clamping time is 0.5-5min, and described Heating temperature is higher than the blowing temperature of used whipping agent; Adopting mixing mould pressing technology to make density is 0.2g/cm3-0.4 g/cm3, and porosity is 0.6-0.85, and thickness is the sheet material of 8mm-20mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210348002.0A CN102876063B (en) | 2012-09-19 | 2012-09-19 | Composite wood-based sound absorbing material, and production method thereof |
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| CN201210348002.0A CN102876063B (en) | 2012-09-19 | 2012-09-19 | Composite wood-based sound absorbing material, and production method thereof |
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| CN102876063A CN102876063A (en) | 2013-01-16 |
| CN102876063B true CN102876063B (en) | 2015-06-17 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN105504189A (en) * | 2015-12-30 | 2016-04-20 | 王丽萍 | Durable fiber board for building |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8403108B2 (en) * | 2009-06-12 | 2013-03-26 | 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 |
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