CN102094513A - Sound insulating and vibration reducing plate and preparation method thereof - Google Patents
Sound insulating and vibration reducing plate and preparation method thereof Download PDFInfo
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- CN102094513A CN102094513A CN2009102603017A CN200910260301A CN102094513A CN 102094513 A CN102094513 A CN 102094513A CN 2009102603017 A CN2009102603017 A CN 2009102603017A CN 200910260301 A CN200910260301 A CN 200910260301A CN 102094513 A CN102094513 A CN 102094513A
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Abstract
The invention provides a sound insulating and vibration reducing plate and a preparation method thereof. The sound insulating and vibration reducing plate comprises rubber particles and an adhesive, wherein the particle size of the rubber particles is 0.5 mm to 8 mm, and the rubber particles are bonded into a whole by polyurethane glue. In the sound insulating and vibration reducing plate, because different particle sizes of rubber particles are adopted and bonded through the environmental-friendly non-toxic polyurethane glue, porous, compact and elastic rubber plates can be formed; an extremely good sound insulating and vibration damping effect can be achieved; the noise can be eliminated by 96 percent; and the level of weighting impact sound pressure of the floor slab of dwelling houses reaches 42db, is far lower than the national standard value (65db) and meets the 3A standards of the highest level of dwelling houses in the national standard, namely Residential Performance Assessment Technical Standards GB/T50362-2005.
Description
Technical field
The present invention relates to a kind of floor resilient flooring and preparation method thereof, particularly a kind of sound insulation vibration damping rubber tile and preparation method thereof.
Background technology
At present, the floor great majority are made for steel concrete, and soundproof effect is poor, and traditional method of sound insulation is shop glass wool or linoleum cloth, but the sound insulation damping block that is to use glass wool, is not accepted by market a little less than the effectiveness in vibration suppression because glass wool is not withstand voltage; The sound insulation damping block that uses linoleum cloth is because the wherein not environmental protection of pitch that adds, and poisonous, and the product soundproof effect of preparation is poor, can not obtain the approval in market, is difficult to promote.Along with people's living standard improves constantly, more and more higher to the requirement of and comfortable for living, certainly will high requirement be proposed to the sound isolation of floor performance, to satisfy people live privacy, comfortableness.
The ground sound insulation materials of floor use now is the crashproof material of a kind of damping, is mainly formed according to acoustic characteristic is refining by the high density polyethylene (HDPE) foaming.Elasticity by nanometer foam makes whole floor form floating building structure, has broken off the solid-borne sound transmission effect.And improved the coincidence effect on ground, upper strata, strengthen the acoustic resistance drag.Small hole by nanometer foam make people's ear sensitive frequency band acoustic energy produce cavity resonance, slacken the energy of sound, reach the purpose of isolated impact sound.Change the frequency of sound transmission by nanometer foam cavity resonance effects, reduce order of reflection, reach the purpose of secluding air sound.This sound insulation materials is the assembly unit material, easily forms overhead speaker, and the hard soundproof effect of material is undesirable and the hollowing sound is big.
Publication number is that the application for a patent for invention of CN1851195A discloses a kind of building and domestic finishing material, and this material adopts EVA rubber foam to manufacture wall brick, floor tile, ceiling, wall corner line, stringcourse, mural painting brick and sound insulation materials; EVA rubber foam is heated to pressurize after cutting out material and is put into mould extruding or blow molding; The artificial caoutchouc clamp time decides according to the thickness of product, can be between 5 seconds to 2 minutes; EVA rubber foam molding temperature is 120-300 ℃; EVA rubber foam molding pressure is the 2-30 ton; This preparation methods complexity, process conditions control difficulty, product quality is difficult to control, and this foam water imbibition height, and the decoration sound insulation materials of preparation is short application life, and soundproof effect is relatively poor.
Publication number is that the application for a patent for invention of CN101298379A discloses the functional environmental protection composite material of a kind of rubber-wood-cement, this material is raw material with waste tire rubber and waste rubber goods, wood materials and portland cement, isocyanate adhesive is put on the waste and old rubber particle surface, to dry after the wood materials immersion treatment, rubber grain after will handling again and wood materials and cement blend form the base material, through mat formation, compacting, maintenance obtain.But the raw material timber in this composite material easily suction rots, and cement is the good conductor of sound, and it forms numerous sound channels, and its soundproof effect is very poor.
Rubber is widely used in many fields as a kind of elastomeric material, mainly is that it is applied to play a part sealing, noise reduction and buffering on various types of automobiles, the train as vibration damping, separation layer as automobile-used packing.
Notice of authorization number discloses a kind of damping rubber product for the patent of invention of CN1176144C, by kilogram weight, it consists of: butyl rubber 3-20, terpene resin 0.08-4, white carbon 0.42-2.5, spray carbon black 0.5-5, high wear-resistant carbon black 0.5-7, polyisobutene 6.5-25, dioctyl ester 0.5-1.8, age resistor 0.1-0.4, light beggar or blanc fixe or lead powder or iron powder 1.8-50, potter's clay or blanc fixe or lead powder or iron powder 0.2-10 adopt the open type rubber mixing machine with rubber mixing machine bag roller on the butyl rubber raw material; Terpene resin and age resistor are pulverized, and 200 orders that sieve drop in the sizing material, stir gradually with white carbon, additive and tackifier, dioctyl ester to add, and treat all to add the back and adjust roll spacing; Thin-thick-thin-thick---; Look mixing even back rubber mixing machine down and cannot not be placed on stickingly on the paper, it is further mixing to advance Rubber Extruder, extrudes the specification product through the shape of the mouth as one speaks.
Notice of authorization number discloses a kind of shock-damping rubber pad and manufacture method thereof for the patent of invention of CN1128176C, this rubber crash roll is base-material with the synthetic rubber, with epoxy resin and curing compound thereof as modifier, be mixed with the automobile-used rubber pad of a kind of after cure type modification, it leans on self-adhesion performance installing and locating between vibrating elements, then through high temperature vulcanized setting.Though the effect of vibration and noise reduction of this rubber crash roll is good, strong adhesion after tack before the sulfuration and the sulfuration and installing and locating after cure setting, this crash roll can only be as shell, the vibration damping between the parts, noise reduction and the potted component of various vehicles.
Notification number is that the application for a patent for invention of CN1760253A discloses a kind of damping products made from foamed rubber and production method thereof, this rubber damping product is matrix material with the ethylene propylene diene rubber, the expanded material that adds filler, softening agent, vulcanizing system and foaming system and make, its prescription quality consists of: (a) ethylene propylene diene rubber is 100 parts; (b) filler 10-300 part; (c) softening agent 10-200 part, if use oil-filled type ethylene propylene diene rubber, its oil-filled umber metering is softening agent; (d) vulcanizing system 1-17 part; (e) foaming system 1-15.Adopt two step method moulded from foam forming method, at first carry out mixing processing, a sulfur foam moulding was carried out in sulfuration in 5-20 minute under 140-180 ℃ temperature then, and last the sulfuration under 120-180 ℃ temperature carried out post-cure typing processing in 10-30 minute, obtained damping products made from foamed rubber.This rubber damping product can only be used as the cushion blocking material of railroad track, heavy mechanical equipment etc.
Publication number is that the application for a patent for invention of CN101014659A discloses a kind of vibration damping and vibration isolation rubber composition, it comprises 100 mass parts have the C-C key in main chain rubber raw materials, 1-200 mass parts silica, with total amount consumption in silica be 2-40 quality % (wherein Y is acetoxyl group or the alkoxyl with 1-6 carbon atom with silane coupler that general formula (1) Y ↓ [3]-S ↓ [1]-Z-S-CO-R represents, Z is that alkylidene and R with 1-8 carbon atom are the alkyl with 1-18 carbon atom).
Publication number is that the application for a patent for invention of CN101260210A discloses a kind of foaming rubber vibration damping noise reduction products and production method thereof, this vibration damping noise reduction products is a matrix material with ethylene propylene diene rubber and natural rubber, the foaming product that is equipped with infill system, softening agent, accelerator, blowing agent and vulcanizing agent and makes, its prescription quality consists of: (a) ethylene propylene diene rubber is 50 parts; (b) natural rubber is 50 parts; (c) infill system 123-148 part; (d) softening agent 30-50 part; (e) accelerator 0.8-3 part; (f) blowing agent 1.5-3 part; (g) vulcanizing agent 1-3 part.Ethylene propylene diene rubber and natural rubber add above-mentioned additive down at 65-85 ℃ and carry out banburying behind over-mastication, obtain foaming rubber vibration damping noise reduction products of the present invention after the processing.This vibration damping noise reduction products is to being applicable to the vehicle inside enhancement of environment.
Above-mentioned elastomeric material is not suitable for using on floor, and the cementability of these materials and cement is poor, and product price is expensive, is difficult to be generalized to the floor building field.
Summary of the invention
The objective of the invention is at above prior art problems, a kind of sound insulation damping block that is used for sound isolation of floor that is made of rubber grain is provided, this sound insulation damping block is porous, densification and resilient plate, and the sound insulation vibration damping layer as floor can play good soundproof effect.
For realizing purpose of the present invention, one aspect of the present invention provides a kind of sound insulation vibration damper plate, comprises rubber grain and cementing agent, and the particle diameter that it is characterized in that described rubber grain is 0.5-8mm.
Wherein, the weight portion proportioning of described rubber grain and cementing agent is 5-12: 1, be preferably 7-10: 1.
Particularly, rubber grain comprises crude rubber particle, middle rubber grain and three kinds of size particles of thin rubbery granule, wherein crude rubber grain diameter＞middle rubber grain particle diameter＞thin rubbery granule at least.
Wherein, described crude rubber particle grain size is 3-8mm, and the particle diameter of described middle rubber grain is 2-2.5mm, and the particle diameter of described thin rubbery granule is 0.5-1.5mm.
Particularly, described rubber is selected butadiene-styrene rubber.
Wherein, described cementing agent is selected polyurethane adhesive;
Particularly, polyurethane adhesive is an one-component humid solidified type polyurethane adhesive.
Especially, described one-component humid solidified type polyurethane adhesive is selected toluene di-isocyanate(TDI) bonding adhesive (being the TDI type polyurethane adhesive) or 4,4`-methyl diphenylene diisocyanate bonding adhesive (being the MDI type polyurethane adhesive).
Particularly, the weight portion proportioning of described crude rubber particle, middle rubber grain, thin rubbery granule is 10-80: 20-50: 20-100, is preferably 10-50: 20-40: 20-70, optimum are 20: 30: 50.
The present invention provides a kind of preparation method of sound insulation damping block on the other hand, comprises following step in sequence:
1) mixes
Rubber grain and cementing agent are mixed, make particle mixture, wherein the weight portion proportioning of rubber grain and cementing agent is 5-12: 1;
2) base
Particle mixture is mated formation on floor, make slab, wherein the thickness of slab is 1.5-2.5 with the ratio of the thickness of finished product sound insulation damping block to be formed: 1;
3) compression moulding
Roll slab with the steel cylinder, leave standstill then to adhesive cures, form the dense layer sound insulating panel, wherein the weight of steel cylinder is 40-80Kg, and the time of rolling is 1-2 minute, and be 10-20 hour hardening time.
Wherein, the weight portion proportion optimization of rubber grain described in the step 1) and cementing agent is 7-10: 1.
Particularly, described rubber grain comprises crude rubber particle, middle rubber grain and thin rubbery granule, and described crude rubber particle grain size is 3-8mm, and the particle diameter of described middle rubber grain is 1.5-3mm, and the particle diameter of described thin rubbery granule is 0.5-1.5mm.
Wherein, the weight portion proportioning of described crude rubber particle, middle rubber grain, thin rubbery granule is 10-80: 20-50: 20-100, is preferably 10-50: 20-40: 20-70, optimum are 20: 30: 50.
Wherein, described cementing agent is selected polyurethane adhesive;
Particularly, polyurethane adhesive is an one-component humid solidified type polyurethane adhesive.
Especially, described one-component humid solidified type polyurethane adhesive is selected toluene di-isocyanate(TDI) bonding adhesive (being the TDI type polyurethane adhesive) or 4,4`-methyl diphenylene diisocyanate bonding adhesive (being the MDI type polyurethane adhesive).
Wherein, described rubber grain is chosen as the butadiene-styrene rubber particle.
Particularly, described rubber grain is pulverized by the sole leftover pieces of junked tire or Shoes Factory and is formed.
Wherein, the thickness of slab step 2) is 1.5-2.5 with the ratio of the thickness of finished product sound insulation damping block: 1.
Wherein, the weight of the cylinder of steel described in the step 3) is preferably 50-70Kg.
Sound insulation damping block of the present invention has following advantage:
1, sound insulation damping block of the present invention adopts the rubber grain of different-grain diameter and by environment-protecting asepsis polyurethane glue bonding, forms porous, densification and resilient rubber tile, and the void content of damping block is 10-20%.
2, the sound insulation effectiveness in vibration suppression of the rubber tile of the present invention's preparation is obvious, sound transmission loss is 30-80db, can eliminate 96% noise, the floor weighted impact sound of sound insulation damping block is arbitrarily downgraded and is reached 42db, the floor weighted impact sound of the dwelling house highest ranking 3A dwelling house 65db that arbitrarily downgrades in the national standard " dwelling house assessment of performance technical standard GB/T50362-2005 ", the soundproof effect dwelling house highest ranking 3A standard in " dwelling house assessment of performance technical standard GB/T50362-2005 " that is up to state standards.
3, the polyurethane glue of the material of sound insulation damping block of the present invention employing rubber grain and environment-protecting asepsis, so sound insulation damping block can not bring environmental issue without any toxicity, is suitable for the room and uses.
4, the preparation method of sound insulation damping block of the present invention is simple, manufacturing condition gentleness, controllable product quality and stable.
5, the employed raw material of sound insulation damping block of the present invention is pulverized the rubber grain of coming for the sole leftover pieces, the junked tire that utilize one factory, and raw material sources are extensive, inexpensive, and the cost of production of sound insulation damping block is low, is suitable for extensive popularization.
6, the present invention's rubber damping plate of utilizing the scrap feed material of natural degradation difficulty to make to have good soundproof effect is turned waste into wealth, and is the important breakthrough that waste material utilizes, and turns waste into wealth, and meets recycling economy, green economy industry that country carries out at present energetically.
Description of drawings
Fig. 1 is the schematic diagram of sound insulation damping block of the present invention.
Description of reference numerals: 1, sound insulation damping block; 2, thin rubbery granule; 3, middle rubber grain; 4, crude rubber particle.
The specific embodiment
Describe the specific embodiment of sound insulation damping block of the present invention in detail below with reference to Fig. 1.
Junked tire of the present invention, the employed rubber of sole leftover pieces are butadiene-styrene rubber.
1, preparation rubber grain
Junked tire is positioned over pulley type mill (the energy-saving tyre crusher of 560A that Xuzhou China Guan Xiangsujixiechang produces) to be pulverized, the sole leftover pieces place shredding machine (the X2-300 type fine crusher that Qingyang, Jiangyin rubber powder factory produces) chopping, obtain the crushing rubber particle, the crushing rubber particle is sieved, and being divided into particle diameter is the crude rubber grain of 3-8mm; Particle diameter is the middle rubber grain of 2-2.5mm; Particle diameter is the thin rubber grain of 0.5-1.5mm;
2, preparation rubber grain compound
Carse, medium and small rubber grain and one-component MDI (4, the 4`-methyl diphenylene diisocyanate) moisture cure urethanes adhesive are mixed, stir, wherein, the ratio of the weight of crude rubber grain, middle rubber grain and thin rubber grain is 20: 30: 50; The gross weight of crude rubber grain, middle rubber grain and thin rubber grain is 7: 1 with the ratio of the weight of one-component TDI polyurethane adhesive;
3, the base of mating formation
The rubber grain compound is mated formation on floor, make slab, the thickness of slab is 12mm, and the thickness of slab is 1.5: 1 with the ratio of the thickness of finished product sound insulation damping block;
4, compression moulding
Roll slab with the steel cylinder, leave standstill then to adhesive solidification, make moulding sound insulation damping block, wherein, the weight of steel cylinder is 50Kg, and the time of rolling is 1 minute, and be 20 hours hardening time, and the thickness of sound insulation damping block is 8mm.
Detect the porosity of the sound insulation damping block make according to Weighing method, the measurement result void content is 10%.
Embodiment 2
Except the bonding adhesive in the preparation rubber grain compound step is one pack system TDI (toluene di-isocyanate(TDI)) moisture cure urethanes adhesive, the ratio of the weight of crude rubber grain, middle rubber grain and thin rubber grain is 10: 20: 70; The gross weight of crude rubber grain, middle rubber grain and thin rubber grain is 10: 1 with the ratio of the weight of one-component TDI polyurethane adhesive; The base step of mating formation, the thickness of slab is 16mm, with the ratio of the thickness of finished product sound insulation damping block be 2: 1; Compression moulding step, the weight of steel cylinder are 70Kg, and the time of rolling is 1 minute, and be outside 10 hours hardening time, and all the other are identical with embodiment 1.
Detect the porosity of the sound insulation damping block that makes according to weighing, the measurement result porosity is 15%.
Embodiment 3
Except the bonding adhesive in the preparation rubber grain compound step is one pack system MDI (4, a 4`-methyl diphenylene diisocyanate) moisture cure urethanes adhesive, the ratio of the weight of crude rubber grain, middle rubber grain and thin rubber grain is 30: 30: 40; The gross weight of crude rubber grain, middle rubber grain and thin rubber grain is 12: 1 with the ratio of the weight of one-component MDI polyurethane adhesive; The base step of mating formation, the thickness of slab is 20mm, with the ratio of the thickness of finished product sound insulation damping block be 2.5: 1; Compression moulding step, the weight of steel cylinder are 60Kg, and the time of rolling is 2 minutes, and be outside 15 hours hardening time, and all the other are identical with embodiment 1.
Detect the porosity of the sound insulation damping block make according to Weighing method, the measurement result porosity is 20%.
Test example 1 floor bump sound insulation test
The door of building of the sound insulation damping block of embodiment 1-3 preparation will be equipped with, the window Close All, one of them is as the sounding chamber, the floor of sound insulation damping block is laid as the sound receiving room in adjacent with the sounding chamber interval, regulation according to " in-site measurement of floor impact sound sound insulation " of national standard " building sound insulation specifications of surveys " in (GBJ75-84) detects then, arbitrarily downgrade according to testing result normalized impact sound, wherein, detecting instrument is binary channels sound pressure measurement system (a BSWA VS302N USB type), sound level calibrator (ND9 type), tapping machine, impact sound sound insulation monodrome is evaluated according to GB/T50121-2005 (being Standard for assessment of building sound insulation).
Testing result is as shown in table 1:
The floor impact sound of the table 1 sound insulation damping block on-the-spot testing result that insulates against sound
Testing result shows:
The thickness of embodiment of the invention 1-3 preparation is that the floor weighted impact sound of the sound insulation damping block of 8mm is arbitrarily downgraded according to national standard " building sound insulation specifications of surveys " " in-site measurement of floor impact sound sound insulation " testing result in (GBJ75-84), the standardization impact sound that calculates is arbitrarily downgraded and is respectively 42db, 40db, 45db, the floor weighted impact sound of the dwelling house highest ranking 3A dwelling house 65db that arbitrarily downgrades in the national standard " dwelling house assessment of performance technical standard GB/T50362-2005 ", the damping effect dwelling house highest ranking 3A standard in " dwelling house assessment of performance technical standard GB/T50362-2005 " that is up to state standards.
Claims (10)
1. a sound insulation vibration damper plate comprises rubber grain and cementing agent, and the particle diameter that it is characterized in that described rubber grain is 0.5mm～8mm.
2. sound insulation vibration damper plate according to claim 1, the weight portion proportioning that it is characterized in that described rubber grain and cementing agent is 5-12: 1.
3. sound insulation vibration damper plate according to claim 1 and 2, it is characterized in that described rubber grain comprises crude rubber particle, middle rubber grain and three kinds of size particles of thin rubbery granule, wherein crude rubber grain diameter＞middle rubber grain particle diameter＞thin rubbery granule at least.
4. sound insulation damping block according to claim 3 is characterized in that described crude rubber particle grain size is 3-8mm, and the particle diameter of described middle rubber grain is 2-2.5mm, and the particle diameter of described thin rubbery granule is 0.5-1.5mm.
5. according to claim 3 or 4 described sound insulation damping blocks, the weight portion proportioning that it is characterized in that described crude rubber particle, middle rubber grain, thin rubbery granule is 10-80: 20-50: 20-100.
6. sound insulation vibration damper plate according to claim 1 and 2 is characterized in that described cementing agent selection polyurethane adhesive.
7. the preparation method of a sound insulation damping block comprises following step in sequence:
1) mixes
Rubber grain and cementing agent are mixed, make particle mixture, wherein the weight portion proportioning of rubber grain and cementing agent is 5-12: 1;
2) base
Particle mixture is mated formation on floor, make slab, wherein the thickness of slab is 1.5-2.5 with the ratio of the thickness of finished product sound insulation damping block to be formed: 1;
3) compression moulding
Roll slab with the steel cylinder, leave standstill then to adhesive cures, form the dense layer sound insulating panel, wherein the weight of steel cylinder is 40-80Kg, and the time of rolling is 1-2 minute, and be 10-20 hour hardening time.
8. preparation method according to claim 7, the weight portion proportion optimization that it is characterized in that rubber grain described in the step 1) and cementing agent is 7-10: 1.
9. according to claim 7 or 8 described preparation methods, it is characterized in that described rubber grain comprises crude rubber particle, middle rubber grain and thin rubbery granule, described crude rubber particle grain size is 3-8mm, the particle diameter of rubber grain is 2-2.5mm in described, and the particle diameter of described thin rubbery granule is 0.5-1.5mm.
10. according to claim 7 or 8 described preparation methods, it is characterized in that step 2) described in the ratio of thickness and the thickness of finished product sound insulation damping block of slab be 1.5-2.0: 1.
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| CN102966232A (en) * | 2012-11-22 | 2013-03-13 | 江苏永辉装饰工程有限公司 | Vibration-reducing and sound-insulating floor |
| CN103817844A (en) * | 2013-11-21 | 2014-05-28 | 江苏兆胜建材有限公司 | Opening structure and compound hole combined type flexible sound absorbing product |
| CN104343194A (en) * | 2014-10-09 | 2015-02-11 | 杨勇 | Rubber particle sound insulation coiled material and preparation method thereof |
| CN104552697A (en) * | 2015-01-23 | 2015-04-29 | 成都市新筑路桥机械股份有限公司 | Preparation method for denoising block |
| CN104775619A (en) * | 2014-01-09 | 2015-07-15 | 马明 | Method for manufacturing rubber sound-insulating heat-insulating floor slab at normal temperature and pressure |
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| CN105317897A (en) * | 2014-05-27 | 2016-02-10 | 江阴市人人达科技有限公司 | Polyurethane rubber sound and vibration insulation cushion and use method thereof |
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| CN102966232A (en) * | 2012-11-22 | 2013-03-13 | 江苏永辉装饰工程有限公司 | Vibration-reducing and sound-insulating floor |
| CN103817844A (en) * | 2013-11-21 | 2014-05-28 | 江苏兆胜建材有限公司 | Opening structure and compound hole combined type flexible sound absorbing product |
| CN104775619A (en) * | 2014-01-09 | 2015-07-15 | 马明 | Method for manufacturing rubber sound-insulating heat-insulating floor slab at normal temperature and pressure |
| CN105317897A (en) * | 2014-05-27 | 2016-02-10 | 江阴市人人达科技有限公司 | Polyurethane rubber sound and vibration insulation cushion and use method thereof |
| CN104343194A (en) * | 2014-10-09 | 2015-02-11 | 杨勇 | Rubber particle sound insulation coiled material and preparation method thereof |
| CN104552697A (en) * | 2015-01-23 | 2015-04-29 | 成都市新筑路桥机械股份有限公司 | Preparation method for denoising block |
| CN106150034A (en) * | 2015-04-28 | 2016-11-23 | 马明 | The foam-in-place at normal temperatures and pressures of a kind of polyurethane makes the preparation method of floor sound insulating layer |
| CN104999595A (en) * | 2015-07-23 | 2015-10-28 | 江苏新光环保工程有限公司 | Porous sound absorption material |
| CN105544419A (en) * | 2016-02-03 | 2016-05-04 | 江阴市人人达科技有限公司 | Expressway or high-speed rail sound insulation wall |
| CN106373548A (en) * | 2016-08-30 | 2017-02-01 | 太仓市方克乐器有限公司 | Intelligent practicing bass drum of drum set |
| CN106750700A (en) * | 2016-11-22 | 2017-05-31 | 深圳洛赛声学技术有限公司 | A kind of building floor preparation method of PU modified rubber particle cushion blockings |
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| CN108115876A (en) * | 2017-12-15 | 2018-06-05 | 南京志绿声学科技有限公司 | A kind of preparation method of floating build floor heat preservation and soundproof pad |
| CN110470824A (en) * | 2018-05-09 | 2019-11-19 | 江苏建筑职业技术学院 | A kind of configuration method of antinoise spectral re-growth consolidation rubber aggregate |
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| CN110640960B (en) * | 2019-09-20 | 2021-09-21 | 东莞泰康泡绵有限公司 | Process for preparing foamed cotton by recycling foamed cotton waste |
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Application publication date: 20110615 |