CN1309144A - Process for reclaiming waste polyurethane foam - Google Patents
Process for reclaiming waste polyurethane foam Download PDFInfo
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- CN1309144A CN1309144A CN00117336A CN00117336A CN1309144A CN 1309144 A CN1309144 A CN 1309144A CN 00117336 A CN00117336 A CN 00117336A CN 00117336 A CN00117336 A CN 00117336A CN 1309144 A CN1309144 A CN 1309144A
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- polyurethane foam
- adoption
- powder
- ppg
- discarded
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
A process for reclaiming the waste foamed polyurethane includes such steps as pulverizing, adding stannous octoate (T-9), toluene diisocyanate (TB1) and polypropylene glycol (PPG), mixing and foaming polymerization to produce new polyurethane foam. Its advantages are no pollution, high productivity, and high air permeability of products.
Description
The invention belongs to environmental protection technical field, refer more particularly to the recycling of discarded adoption of polyurethane foam.
Adoption of polyurethane foam is as well behaved damping sound absorbent material, and purposes is wide, consumption is big, and the discarded amount after the use is also big.Now make landfill or burning disposal, environmental pollution is serious more.The treatment process of being introduced as Chinese patent application numbers 96114486,6 and Application No. 4666646, the former will use the organic solvent dichloromethane of pollution, forms secondary pollution, and the latter needs 24 hours ability cropping of products cooling time, activity time is long, and efficient is low.
The recoverying and utilizing method that the purpose of this invention is to provide a kind of discarded adoption of polyurethane foam, its non-secondary pollution, production efficiency height.
The object of the present invention is achieved like this:
A kind of recoverying and utilizing method of discarded adoption of polyurethane foam is characterized in that: will discard adoption of polyurethane foam and (be distinguished according to color, density; Then) pulverizing obtains (granularity is suitable) powder; The raw material and the thorough mixing that in this powder, add stannous octoate (T-9), toluene diisocyanate (TB1), (having heated) polypropylene glycol adoption of polyurethane foam such as (PPG); The raw material generation polymerization foamable reaction of stannous octoate (T-9), toluene diisocyanate (TB1), (having heated) polypropylene glycol adoption of polyurethane foam such as (PPG) is wrapped in described " powder " among the newly-generated adoption of polyurethane foam product.
Specifically, be to discard the Polyurethane pulverizing to obtain powder, again to the powder damping, stir, add stannous octoate (T-9), toluene diisocyanate (TB1), (having heated) polypropylene glycol abundant polyreactions such as (PPG) with spray pattern when continuing to stir, mixed foaming becomes foamed material; Foamed material is pressed into mould, in die cavity, feeds steam, make moulding; The demoulding then, cut into product.
This method is filled in the adoption of polyurethane foam product of new synthetic foaming with the powder of discarded adoption of polyurethane foam, does not use the raw material methylene dichloride, has free of contaminationly handled discarded adoption of polyurethane foam; By using special toluene diisocyanate (TB1) and advancing steam heating, moulding and cut that (annotate: the special toluene diisocyanate that present method is used is TDI-90 rapidly, include 2-4TDC than high ingredient, reactive general T-80 is strong, make polyreaction at lower temperature and short period, and strengthen its toughness and pulling force.Following TDI-90 is called for short TB1); And the reconstituted product of gained has characteristics such as stronger ventilative, antibiotic, moisture absorption, snappiness, is as footwear material, warm pad of shoes and replaces other elastomeric preferred materials, is compared as follows with product E VA in the past:
| Unit of measure | Reconstituted product | EVA | Note | |
| Hardness | Degree | 20 | ?30 | It is better little to heal |
| Compression | ％ | 5 | ?15 | It is better little to heal |
| The unit surface bacterium grows ratio | ％ | ＜1％ | TBD | It is better little to heal |
| The moisture conduction | MG/SQ?CM/HR?? | 4.5 | ?0 | More better |
| Dry | Hour | 1 | ?1 | It is better little to heal |
| Shock-absorbing | " G " value | 13.5 | ?12.8 | It is better little to heal |
| The buffering factor | No unit | 4.4 | ?8.4 | It is better little to heal |
With regard to the foam product of equal volume (or weight), the raw material that it consumed is less, has reduced cost, is about to discarded adoption of polyurethane foam and has done valuable recycling.
Introduce the present invention in detail below in conjunction with accompanying drawing:
Fig. 1 is the production process figure of the embodiment of the invention.
Fig. 2 looks synoptic diagram with the master that pulverizer is pulverized.
Fig. 3 is that synoptic diagram is looked on the left side of Fig. 2.
Fig. 4 looks synoptic diagram with the master that damping machine carries out damping.
Fig. 5 is that synoptic diagram is looked on the left side of Fig. 4.
Fig. 6 looks synoptic diagram the master that foaming machine foams.
Fig. 7 is that synoptic diagram is looked on the left side of Fig. 6.
Fig. 8 is the synoptic diagram of moulding in shaper.
Among Fig. 1 " 100? " its implication is " granularity of powder 19 is enough thin? "
As shown in Figure 1, a kind of recoverying and utilizing method of discarded adoption of polyurethane foam is characterized in that: will discard adoption of polyurethane foam 00 and (be distinguished according to color, density; Then) pulverize 11 and obtain (granularity is suitable) powder 19; If the not enough detailed rules and regulations of powder size further pulverize 111 again; The raw material and the thorough mixing that in powder 19, add stannous octoate (T-9), toluene diisocyanate (TB1), (having heated 22) polypropylene glycol adoption of polyurethane foam such as (PPG); The raw material generation polymerization foamable reaction of stannous octoate (T-9), toluene diisocyanate (TB1), polypropylene glycol adoption of polyurethane foam such as (PPG) is wrapped in described " powder " among the newly-generated adoption of polyurethane foam product.
As shown in Figure 1, discarded adoption of polyurethane foam 00 (is distinguished according to color, density; Then) pulverize 11 and obtain (granularity is suitable) powder 19; Powder 19 is carried out damping and stirs 21,234 modes add stannous octoate (T-9), toluene diisocyanate (TB1), polypropylene glycol raw materials such as (PPG) to powder 19 to spray, stir powder 19 simultaneously and make and the raw material thorough mixing, become foamed material 39 through polymerization foamable reaction 31; Foamed material 39 is pressed into mould, in die cavity, feeds steam 05, make moulding 41; Carry out the demoulding 51 then, cut 52 and become product 99.
Specifically, comprise the following steps:
1. choose the useless Polyurethane bubble silk floss 00 of required pulverizing according to production requirement (as color, specification, density etc.), pick out sclerderm, impurity etc., distinguish useless Polyurethane and steep continuous color and density height; Require to finish changing the pulverizing filter screen according to thickness, the useless Polyurethane bubble of having selected is continuous broken 111 by second strong crusher fine powder again by first strong crusher coarse reduction earlier, and it is of uniform size irregular granular to make useless Polyurethane steep 19 one-tenth of continuous particles.
2. the useless Polyurethane of step 1 is steeped continuous particle 19 and carry out damping 21, it is suitable promptly to be transferred to humidity by damping machine, so that fully absorb the resin in the raw material during foaming.Take by weighing polypropylene glycol (PPG), toluene diisocyanate (TB1) and stannous octoate (T-9) by certain ratio simultaneously, and polypropylene glycol (PPG) is heated 22, promptly by steam heating jar heating polypropylene glycol (PPG).
3. the useless Polyurethane with step 2 damping steeps constantly stirring in the continuous particle input foaming machine, adds an amount of toner earlier and stirs, and adds the raw material that step 2 has been got ready by spray pattern again, compound is stirred and foam to obtain foamed material 39.Be called for short and carry out mixed foaming 31.
4. the foamed material 39 that step 3 is obtained is lowered in the reaction mould machine, by the successively alternately whole mechanical system that moves up and down of the upper and lower pressing plate of mould, in mould, compress the useless Polyurethane compound 39 of mixed foaming, and its integral body is done upper and lower moving, with the spatial distribution of even its density and hardness.
5. the logical steam 05 of useless Polyurethane compound that step 4 has been compressed makes it moulding at once.
6. the in type finished product of step 5 is split away off in mould.Promptly be carried out to the product demoulding 51.
7. the finished product that step 6 is split away off (passing through circle cutting machine) cuts into product 99.
As Fig. 2, shown in Figure 3, step 1 is to utilize strong crusher to make useless Polyurethane bubble continuous 201 be ground into of uniform size irregular granular.This strong crusher inner-wall surface and central rolling disc 202 are provided with most the stationary knifes of arranging 203, central authorities' rolling disc has filter screen 204, filter screen can be provided with size according to needing the thickness degree of pulverizing, screen specification is 2mm-18mm, place, stationary knife location is connecting water pump cooling duct 205, play the effect of cooling body during body work, a capaciting material groove 206 is arranged under the filter screen, connecting capaciting material groove has an exhaust blower 207 and leads to carrier pipe 208.The useless Polyurethane bubble of choosing continuous 201 is put into the hopper 209 of strong crusher, drive the central turn disc Polyurethane bubble silk floss that will give up and be broken into irregular granular by starting central rolling disc electric motor 210, becoming useless Polyurethane of uniform size to steep continuous particle 211 by strainer filtering again falls into capaciting material groove, by exhaust blower particle is delivered in the damping machine by carrier pipe.In order to save time and to improve pulverizing output, two strong crushers of general use, by setting to the filter screen thickness, carrying out thickness by first strong crusher earlier pulverizes, it is broken to carry out fine powder by second strong crusher again, also can use many pulverizers in case of necessity, repeatedly more fine powder is broken, by exhaust blower particle is delivered in the damping machine by carrier pipe at last.
As Fig. 4, shown in Figure 5, step 2 is that the useless Polyurethane with step 1 steeps continuous particle 211 to be transferred to humidity by damping machine suitable, so that fully absorb the resin in the raw material during foaming.Around this damping machine paddle 301 enclosed electrothermal tube 302 is arranged, top is installed into bin gate 303, and the bottom is close to material-conveying belt 304 bin gate 305 under the fluid pressure type, and one of material-conveying belt has a defeated hopper 307 that is connected with carrier pipe 306.The useless Polyurethane of step 1 steeps continuous particle 211 and is input in the damping machine by feeding gate, start variable speed turbine electric motor 308, setting the positive rotary speed of paddle is 50-80 rev/min, when needing oven dry, start electrothermal tube power, design temperature is about 60 ℃, (when needing humidification, spray water smoke) stir about 10 minutes of damping, start material-conveying belt, defeated hopper and carrier pipe, damping machine paddle speed is reduced to 10-20 rev/min, start bin gate hydropress 309 down, open down bin gate, the useless Polyurethane that damping is good is steeped continuous particle 310 stir out to drop on to deliver on the material-conveying belt in the defeated hopper and deliver in the stirrer that foams through carrier pipe.Meanwhile, take by weighing polypropylene glycol (PPG), toluene diisocyanate (TB1) and stannous octoate (T-9), and heat polypropylene glycol (PPG) to about 45 ℃, make its raw material dilution, atomize more during injection by the steam heating jar by certain ratio.
As Fig. 6, shown in Figure 7, step 3 is that the useless Polyurethane with step 2 damping steeps continuous particle 310 and stirs by foaming machine and toner, adds raw material by spray pattern again, mixes foaming.This foaming machine opening for feed 401 is connecting carrier pipe 306, opening for feed has covered two and has advanced raw material mouth 402, be provided with two paddles 403 in the machine, stir in order to compound, bin gate 404 under the semicircle air pressure type of two fans is housed under the body, several roll mutually and stir axle 406 side by side on the blanking student discharge bucket 405, and a blanking skewed slot 407 is arranged under the discharge bucket.The step 2 useless Polyurethane of damping is steeped continuous particle 310 by the opening for feed input, adds an amount of toner, starts variable speed turbine electric motor 408 and drives the two paddles of foaming, and its compound is stirred; Polypropylene glycol (PPG) that step 2 has been got ready and stannous octoate (T-9) mixing and stirring, filtration is poured in polypropylene glycol (PPG) the pumping jar, the toluene diisocyanate that step 2 has been got ready (TB1) filters and pours in toluene diisocyanate (TB1) the pumping jar, and its filtration is in case impurities in raw materials is stopped up gun slot; Regulating the two positive rotary speeds of paddle of foaming is 150 rev/mins; Polypropylene glycol (PPG) pumping spray gun 409 is inserted foaming machine to be advanced in the raw material mouth, add polypropylene glycol (PPG) and stannous octoate (T-9) compound earlier by spray pattern, sprayed in about 8 minutes, regulate the two paddles of foaming, forward and backward respectively stirred 1 minute, and mixture is stirred; Continue then in another advances the raw material mouth, to add toluene diisocyanate (TB1) with method by spray pattern, at this moment mixture generation chemical reaction and foaming in the foaming machine, sprayed toluene diisocyanate (TB1) after 4 minutes, blanking immediately: open down bin gate, start to roll mutually simultaneously and stir an electric motor 410, speed setting is 30 rev/mins, driving mutual roll-type revolving gear 411 allows the useless Polyurethane of hybrid reaction steep continuous particle 412 to stir axle and evenly roll over broken again by rolling mutually, fall into the blanking skewed slot by discharge bucket, in discharge port 413 flows into reaction mould machine.The amount of mixture can be by production requirement (as color among the present invention, specification, density etc.) decide, general useless Polyurethane steeps continuous particle and accounts for 80-85%, polypropylene glycol (PPG) accounts for 10-15%, toluene diisocyanate (TB1) accounts for 5-8%, stannous octoate (T-9) accounts for 0.04-0.12%, and useless Polyurethane steeps continuous particle, polypropylene glycol (PPG), the ideal weight ratio of toluene diisocyanate (TB1) and stannous octoate (T-9) is 81.4: 12: 6: 0.06, promptly when the useless Polyurethane of 190Kg steeps continuous particle, according to the ideal weight ratio of above-mentioned compound, 28Kg polypropylene glycol (PPG) must be arranged, 14Kg toluene diisocyanate (TB1) and 0.14Kg stannous octoate (T-9).
As shown in Figure 8, step 4 is that the useless Polyurethane compound 414 of step 3 mixed foaming is compressed in reaction mould machine mechanically.This reaction mould machine center is a circle mould 501, the circle mode diameter can reach 1.2m, on the circle mould, under be respectively equipped with the fluid pressure type pressing plate, its top board 502, press table 503 can integral body move up and down, can effectively control finished product levels density and hardness uniformity coefficient in the round mould, vapour pipe 504 is equipped with at the top board center, both can advance steam from the compound center, convenient again to the finished product central hole, outer ring, circle mould middle part is provided with 10 steam valves 505 in addition, be beneficial to compound and can fully accept steam heating, on the top board, have one to drive hydraulic stem moving up and down under the press table respectively by hydropress, there are 4 inductor blocks to be respectively inductor block 507 on the last hydraulic stem 506, inductor block 508, inductor block 509, inductor block 510, there are 3 inductor blocks to be respectively inductor block 512 on the following hydraulic stem 511, inductor block 513, inductor block 514, press table side have one by hydropress drive can before and after push away the side hydraulic stem 515 that contracts.The step 3 useless Polyurethane compound 414 of mixed foaming is lowered in the round mould, press table is playback inductor block 5 places earlier, the primer fluid press, when the height of piling up in the circle mould when useless Polyurethane compound is greater than or equal to the finished product height 70% of setting, press the decline switch of top board, top board is dropped to according to good inductor block 2 places of finished product height setting, compound is last, extruding forms cylindric between press table, set traveling time then, press moving switch, round mould top board is moved around at inductor block 2 and 3 of inductor blocks, round simultaneously die slide moves around at inductor block 5 and 6 of inductor blocks, when traveling time then, justify mould and stop automatically, the compound compression is finished, and closes hydropress.When the height of piling up in the circle mould when useless Polyurethane compound is lower than the finished product height 70% of setting, press the decline switch of top board, when making top board drop to according to good inductor block 2 places of finished product height setting, compound promptly compresses to be finished, and closes hydropress.
Promptly be: in upright mould, before the logical steam, alternately from upper and lower to compression foamed material 39, and on the whole, mobile foamed material 39 down, distribute with even its density and hardness.
As shown in Figure 8, step 5 is that the useless Polyurethane compound that continues in reaction mould machine step 4 have been compressed leads to steam, makes it moulding at once.Must earlier the moisture content in the steam-pipe be discharged before the logical steam, open vapour pipe 504 and outer ring, circle mould middle part steam governing valve 505 in the top board then simultaneously, be as the criterion into steam 3-5 minute to fall 1 pressure, the Polyurethane preheating of mixed material will give up earlier, then steam valve is all opened into heating in steam 5-7 minute, and the rapid reaction moulding, the steam off valve gets final product the demoulding.
Right cylinder foam after the demoulding becomes rolled sheet material through slicing successively.
Claims (6)
1. the recoverying and utilizing method of a discarded adoption of polyurethane foam is characterized in that: will discard adoption of polyurethane foam (00) and pulverize (11) and obtain powder (19); In powder (19), add stannous octoate (T-9), toluene diisocyanate (TB1), (raw material and the thorough mixing of polypropylene glycol adoption of polyurethane foam such as (PPG); The raw material generation polymerization foamable reaction of stannous octoate (T-9), toluene diisocyanate (TB1), polypropylene glycol adoption of polyurethane foam such as (PPG) is wrapped in described " powder " among the newly-generated adoption of polyurethane foam product.
2. the recoverying and utilizing method of discarded adoption of polyurethane foam according to claim 1, it is characterized in that: earlier powder (19) is carried out damping (21), in powder (19), add stannous octoate (T-9), toluene diisocyanate (TB1), (raw material and the thorough mixing of polypropylene glycol adoption of polyurethane foam such as (PPG) again.
3. the recoverying and utilizing method of discarded adoption of polyurethane foam according to claim 1 is characterized in that: add stannous octoate (T-9), toluene diisocyanate (TB1), polypropylene glycol raw materials such as (PPG) in spraying (234) mode to powder (19); And wherein stannous octoate (T-9) is carried out heating (22) in advance.
4. the recoverying and utilizing method of discarded adoption of polyurethane foam according to claim 3, it is characterized in that: described " raw material and the thorough mixing that add stannous octoate (T-9), toluene diisocyanate (TB1), polypropylene glycol adoption of polyurethane foam such as (PPG) in powder (19) ", its " mixing " realizes through two-way stirring in foaming machine.
5. the recoverying and utilizing method of discarded adoption of polyurethane foam according to claim 1 is characterized in that: powder (19) becomes foamed material (39) with the raw material thorough mixing and through polymerization foamable reaction (31); Foamed material (39) is pressed into mould, in die cavity, feeds steam (05), make rapid shaping (41).
6. the recoverying and utilizing method of discarded adoption of polyurethane foam according to claim 5 is characterized in that: in upright mould, before the logical steam, alternately from upper and lower to compression foamed material (39), and on the whole, mobile foamed material (39) down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00117336A CN1093548C (en) | 2000-08-17 | 2000-08-17 | Process for reclaiming waste polyurethane foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00117336A CN1093548C (en) | 2000-08-17 | 2000-08-17 | Process for reclaiming waste polyurethane foam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1309144A true CN1309144A (en) | 2001-08-22 |
| CN1093548C CN1093548C (en) | 2002-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00117336A Expired - Fee Related CN1093548C (en) | 2000-08-17 | 2000-08-17 | Process for reclaiming waste polyurethane foam |
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| Country | Link |
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| CN (1) | CN1093548C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101440171B (en) * | 2008-10-22 | 2011-07-13 | 无锡吉兴汽车部件有限公司 | Process for recovering polyurethane composite waste material for automobile roof liner |
| CN102912462A (en) * | 2012-11-08 | 2013-02-06 | 曾维民 | Vertical regenerated cotton device and production technology |
| CN103709725A (en) * | 2014-01-15 | 2014-04-09 | 何晋帆 | Foam and fabrication method thereof |
| WO2014138827A1 (en) * | 2013-03-11 | 2014-09-18 | Vivan Gilceu Antonio | Method for manufacturing road signs from pressed polyurethane waste |
| CN104420206A (en) * | 2013-08-22 | 2015-03-18 | 南通丝乡丝绸有限公司 | Cotton capable of preventing high temperature |
| CN105331086A (en) * | 2015-11-09 | 2016-02-17 | 重庆市宏立摩托车制造有限公司 | Waste polyurethane foam recycling method |
| CN107383305A (en) * | 2017-08-23 | 2017-11-24 | 北京家美科技有限公司 | Difficult degradation technical polyurethane product waste regenerated Application way and reconstituted product |
| CN108715679A (en) * | 2018-05-22 | 2018-10-30 | 广汉市新鸿海绵有限公司 | A kind of PU sponges of good permeability and preparation method thereof |
| CN110640960A (en) * | 2019-09-20 | 2020-01-03 | 东莞泰康泡绵有限公司 | Process for preparing foamed cotton by recycling foamed cotton waste |
| CN113087955A (en) * | 2021-04-07 | 2021-07-09 | 上海旗玺科技中心 | Environment-friendly dust-free foam and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4316190C1 (en) * | 1993-05-14 | 1994-12-08 | Hennecke Gmbh Maschf | Method and device for processing polyurethane foam waste, in particular flexible foam waste, for recycling as additives in the manufacture of polyurethane |
| CN1044485C (en) * | 1995-04-07 | 1999-08-04 | 张金炳 | Reproduction of foamed polyurethane |
-
2000
- 2000-08-17 CN CN00117336A patent/CN1093548C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101440171B (en) * | 2008-10-22 | 2011-07-13 | 无锡吉兴汽车部件有限公司 | Process for recovering polyurethane composite waste material for automobile roof liner |
| CN102912462A (en) * | 2012-11-08 | 2013-02-06 | 曾维民 | Vertical regenerated cotton device and production technology |
| WO2014138827A1 (en) * | 2013-03-11 | 2014-09-18 | Vivan Gilceu Antonio | Method for manufacturing road signs from pressed polyurethane waste |
| CN104420206A (en) * | 2013-08-22 | 2015-03-18 | 南通丝乡丝绸有限公司 | Cotton capable of preventing high temperature |
| CN103709725A (en) * | 2014-01-15 | 2014-04-09 | 何晋帆 | Foam and fabrication method thereof |
| CN105331086A (en) * | 2015-11-09 | 2016-02-17 | 重庆市宏立摩托车制造有限公司 | Waste polyurethane foam recycling method |
| CN105331086B (en) * | 2015-11-09 | 2017-12-12 | 重庆市宏立摩托车制造有限公司 | The recycling process method of waste polyurethane foam |
| CN107383305A (en) * | 2017-08-23 | 2017-11-24 | 北京家美科技有限公司 | Difficult degradation technical polyurethane product waste regenerated Application way and reconstituted product |
| CN108715679A (en) * | 2018-05-22 | 2018-10-30 | 广汉市新鸿海绵有限公司 | A kind of PU sponges of good permeability and preparation method thereof |
| CN110640960A (en) * | 2019-09-20 | 2020-01-03 | 东莞泰康泡绵有限公司 | Process for preparing foamed cotton by recycling foamed cotton waste |
| 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 |
| CN113087955A (en) * | 2021-04-07 | 2021-07-09 | 上海旗玺科技中心 | Environment-friendly dust-free foam and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1093548C (en) | 2002-10-30 |
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