CN104118075A - Method for recycling waste rigid polyurethane foam plastics and waste spandex filaments - Google Patents
Method for recycling waste rigid polyurethane foam plastics and waste spandex filaments Download PDFInfo
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- CN104118075A CN104118075A CN201310143668.7A CN201310143668A CN104118075A CN 104118075 A CN104118075 A CN 104118075A CN 201310143668 A CN201310143668 A CN 201310143668A CN 104118075 A CN104118075 A CN 104118075A
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- polyurethane foam
- waste
- polyurethane
- spandex thread
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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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Abstract
The invention provides a method for recycling waste rigid polyurethane foam plastics and waste spandex filaments. The method comprises the following steps: 1, respectively crushing waste rigid polyurethane foam plastics and waste spandex filaments to obtain polyurethane foam particles and short spandex filaments; 2, mixing raw materials to obtain a mixture at room temperature, and pre-pressing the mixture, wherein the raw materials comprise the polyurethane foam particles, the short spandex filaments, an adhesive and water; and 3, carrying out hot press molding on the pre-pressed mixture obtained in step 2 to prepare a polyurethane composite material. The method has the advantages of simple process, low cost, simultaneous recycling of the waste rigid polyurethane foam plastics and the waste spandex filaments, waste use benefiting and environmental protection benefiting. The polyurethane composite prepared by adopting the method has the advantages of no formaldehyde, good flame retardation property, and certain toughness and strength, and can replace middle density boards, particleboards and the like to be applied in all kinds of doors, windows, floors and table boards.
Description
Technical field
The present invention relates to a kind of method that junk is recycled, relate in particular to a kind of method that waste hard polyurethane foam and useless spandex thread are recycled.
Background technology
RPUF is a kind of heat-insulating material and structural material of function admirable.In the each based article of polyurethane, output is only second to flex foam.RPUF is a kind of highly cross-linked thermosets.Foam structure major part is obturator-type, and a small amount of open-celled structure hard bubbles for special occasions.The key property of RPUF is that it is firmly tough, in addition, due to the consumption of auxiliary agent and the differences of kind such as its fire retardant, blowing agent, catalyst, has also given hard polyurethane foam different performances.The premium properties such as it is expandable, toughness, lower temperature resistance, solvent resistance, resistance to biodeterioration make it be widely used in the fields such as refrigerating equipment, automobile, train, building, military affairs, basin pipe insulation, packaging, office appliance.Owing to using and also having caused the appearance (waste material and leftover pieces) of a large amount of discarded objects widely, pollute environment, therefore the recovery to hard polyurethane foam and be treated as problem in the urgent need to address.
Spandex (Spandex) (being commonly called as PU elastomer) is the fiber of a kind of tool high resiliency and retractility, all better than rubber on hot strength, tensile stress mar proof chemical proofing.Made textile by weaving dealer extensive use now.In the enterprise production process such as current textile of chemical fibre, there are producing the situations of a large amount of discarded corner zero material, how spandex waste silk is rationally recycled, become the problem that is related to that sustainable development is urgently to be resolved hurrily.
RPUF and spandex all belong to polyurethane type, there is similar characteristic group: amino methyl base and urea groups, and crosslinking degree is all higher, can not dissolve, can not melting, cannot secondary operations, in recent years, China's RPUF and spandex are all realized heavy industrialization, production capacity increases year by year, the waste hard polyurethane foam producing in production process and useless spandex thread have become serious problem, if directly adopt the method for burying and burning to process waste hard polyurethane foam and useless spandex thread, so only waste a large amount of industrial chemicals, also can cause land wastage and environmental pollution, do not meet the sustainable development of ecological environment.
CN102516595A discloses a kind of RPUF recoverying and utilizing method, hard polyaminoester and the nylon separated after crosslinked are mixed, finally by extrude or compressing be sheet material.The method need to be crosslinked by hard polyurethane esterlysis, and operation is too complicated.
CN102251316 discloses a kind of method of utilizing spandex waste silk remanufacture spandex thread, in stoste, adds spandex short fiber, adds DMAC, is deployed into spinning solution, makes spandex finished product.The method need to be prepared stoste, too complicated.
Due to RPUF and the special physicochemical properties of spandex, recycling of the prior art all needs to carry out some chemical treatments, operation is too complicated, and can only be separately by its processing, not yet there are the effective ways of a kind of while RPUF and spandex specially treated, those skilled in the art seek a kind of simple method that can simultaneously recycle waste hard polyurethane foam and useless spandex thread for a long time always, but do not make progress.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, a kind of method that provides waste hard polyurethane foam and useless spandex thread to recycle can be recycled waste hard polyurethane foam and useless spandex thread simultaneously, technique is simple, cost is low, has both been conducive to twice laid, is conducive to again environmental protection.
The invention provides a kind of method that waste hard polyurethane foam and useless spandex thread are recycled, comprise the following steps:
Step 1, by waste hard polyurethane foam and useless spandex thread pulverization process, obtains polyurethane foam particle and short spandex thread respectively;
Step 2, makes compound, normal temperature precompressed after raw material is mixed; Wherein raw material comprises described polyurethane foam particle, described short spandex thread, adhesive and water;
Step 3, by hot-forming the compound after step 2 precompressed, makes compound polyurethane material.
Preferably, the raw material in step 2, according to weight percent meter, comprising:
Polyurethane foam particle 80～100%(is preferably 80%～99.9%, as 85%～95%);
Short spandex thread 0～20%(is preferably 0.1%～20%, as 5%～15%);
Adhesive 5～15%;
Water 1～4%.
Preferably, step 2 Raw is made up of polyurethane foam particle, short spandex thread, adhesive and water.
Wherein, described adhesive can be one or more in natural adhesive and synthetic adhesive.
Natural adhesive comprises: starch based; Protein adhesive class, for example gelatine, hide glue, fish (fat) glue, blood glue, junket, rubber made from soybean cake, peanut glue; Natural rubber; Inorganic adhesive, such as sodium metasilicate, oxychloride magnesium, cement etc.
Synthetic adhesive comprises: thermosetting resin, such as epoxy resin, phenolic resins, Lauxite, melamine-formaldehyde resin, organic siliconresin, furane resins, unsaturated polyester (UP), acrylic resin, polyimides, polybenzimidazoles, phenolic aldehyde-Pioloform, polyvinyl acetal, phenolic aldehyde-polyamide, phenolic aldehyde-epoxy resin, epoxy-polyamide, resorcinol etc.; Thermoplasticity natural gum, such as cellulose esters, polyvinyl acetate, polyvinyl alcohol, chlorinated polyvinyl chloride, polyisobutene, a-cyanoacrylate, Pioloform, polyvinyl acetal, polyvinyl acetate, polyacrylate, alcohol phenol vinegar, polyvinyl alcohol etc.; Synthetic rubber class, such as neoprene, butadiene-styrene rubber, butyl rubber, acrylonitrile-butadiene rubber, buna, isoprene rubber, polysulfide rubber, polyurethane adhesive, chlorosulfonated polyethylene elastomer, silicon rubber etc.
Preferably, described adhesive is polyurethane adhesive.
Wherein, in step 3, hot-forming pressure is 60-200bar,, be preferably 60～150bar, be preferably 80～150bar, more preferably 90-140bar, more preferably 100-120bar.
Temperature hot-forming in step 3 is 80～180 DEG C, is preferably 100～180 DEG C, is preferably 120～160 DEG C, more preferably 130～150 DEG C.
Time hot-forming in step 3 is 1～30min, is preferably 5～25min, more preferably 10-15min.
The diameter of the polyurethane foam particle that preferably, step 1 obtains is 1～5mm.
Preferably, the short spandex thread length that step 1 obtains is 1～5cm.
Preferably, in step 2, the aspect ratio before compound precompressed and after precompressed is 3:1～4:1.
Preferably, the polyurethane foam particle that step 1 obtains and short spandex thread before carry out step 2, first separating and removing impurities.
Wherein, described compound polyurethane material can be sheet material, sheet material, tubing, film or profile shapes, is preferably sheet material or sheet material, more preferably sheet material, for example imitative plank.
Preferably, also comprise post-processing step: the compound polyurethane material making is carried out to sanding and/or cutting process.
The compound polyurethane material that the present invention also provides a kind of said method to make.
Wherein, described compound polyurethane material can be sheet material, sheet material, tubing, film or profile shapes, is preferably sheet material or sheet material, more preferably sheet material, for example imitative plank.
Technique of the present invention is simple, and cost is low, can reclaim waste hard polyurethane foam and useless spandex thread simultaneously, has both been conducive to twice laid, is conducive to again environmental protection.And the compound polyurethane material that adopts the inventive method to make is formaldehydeless, good flame resistance, there is the intensity of certain toughness, alternative medium-density plate, particieboards etc. are applied to all kinds of doors, window, floor, table top etc.
Brief description of the drawings
Fig. 1 is process chart of the present invention.
Detailed description of the invention
With reference to the accompanying drawings, the present invention is further illustrated in conjunction with specific embodiments, to understand better the present invention.
Embodiment 1
Waste hard polyurethane foam is pulverized and removed impurity, obtain being of a size of the foam beads of 1～5mm.Take 95kg;
Impurity is pulverized and removed to the spandex thread that will give up, and obtains being of a size of the short spandex thread of 1～5cm, takes 5kg;
Foam beads and short spandex thread are poured in mixer, fully stirred after adding 12kg polyurethane adhesive, in whipping process, with atomizers spray 1kg water;
To add adhesive and water, and pour in long 2.7 meters, wide 1.5 meters, the container of high 0.5 meter through well-beaten compound, after pressure roller, send in hot press, carry out hot-forming.Wherein hot-forming temperature is 150 DEG C, and pressure is 120bar, and the dwell time is 10min.
Unloading applied pressure, takes out the sheet material demoulding, obtains the thick embryo of polyurethane imitation plank, then passes through sanding, and the operations such as cutting, can be made into the polyurethane imitation plank sheet material of all size size shape.
Embodiment 2
Waste hard polyurethane foam is pulverized and removed impurity, obtain being of a size of the foam beads of 1～5mm.Take 90kg;
Impurity is pulverized and removed to the spandex thread that will give up, and obtains being of a size of the short spandex thread of 1～5cm, takes 10kg;
Foam beads and short spandex thread are poured in mixer, fully stirred after adding 10kg polyurethane adhesive, in whipping process, with atomizers spray 3kg water;
To add adhesive and water, and pour in long 2.7 meters, wide 1.5 meters, the container of high 0.5 meter through well-beaten compound, after pressure roller, send in hot press, carry out hot-forming.Wherein hot-forming temperature is 150 DEG C, and pressure is 130bar, and the dwell time is 10min.
Unloading applied pressure, takes out the sheet material demoulding, obtains the thick embryo of polyurethane imitation plank, then passes through sanding, and the operations such as cutting, can be made into the polyurethane imitation plank sheet material of all size size shape.
Embodiment 3
Waste hard polyurethane foam is pulverized and removed impurity, obtain being of a size of the foam beads of 1～5mm.Take 85kg;
Impurity is pulverized and removed to the spandex thread that will give up, and obtains being of a size of the short spandex thread of 1～5cm, takes 7kg;
Foam beads and short spandex thread are poured in mixer, fully stirred after adding 8kg polyurethane adhesive, in whipping process, with atomizers spray 3kg water;
To add adhesive and water, and pour in long 2.7 meters, wide 1.5 meters, the container of high 0.5 meter through well-beaten compound, after pressure roller, send in hot press, carry out hot-forming.Wherein hot-forming temperature is 150 DEG C, and pressure is 120bar, and the dwell time is 15min.
Unloading applied pressure, takes out the sheet material demoulding, obtains the thick embryo of polyurethane imitation plank, then passes through sanding, and the operations such as cutting, can be made into the polyurethane imitation plank sheet material of all size size shape.
The polyurethane imitation plank that embodiment 1,2 and 3 is made detects, and result is as shown in table 1, and gained polyurethane imitation plank is not containing formaldehyde, and methyl alcohol burst size meets national E0 grade standard; Moisture content is low, and alternative timber is for indoor floor, door, window, various table top, room partition panel etc.; In addition, gained polyurethane imitation plank also has good heat insulation and soundproof effect.
The testing result of table 1 gained polyurethane imitation of the present invention plank
The test of test specimen is with reference to GB/T17657-199 wood-based plate physicochemical property test method.Wherein, density measurement is with reference to 4.2 regulations, and measurement of water-content coefficient is with reference to 4.3 regulations, and burst size of methanal is measured with reference to 4.12 regulations, and 24h thickness swelling rate is with reference to 4.4 regulations.
Above specific embodiments of the invention be have been described in detail, but it is just as example, the present invention is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and alternative also all among category of the present invention.Therefore, equalization conversion and the amendment done without departing from the spirit and scope of the invention, all should contain within the scope of the invention.
Claims (10)
1. the method that waste hard polyurethane foam and useless spandex thread are recycled, other are characterised in that, comprise the following steps:
Step 1, by waste hard polyurethane foam and useless spandex thread pulverization process, obtains polyurethane foam particle and short spandex thread respectively;
Step 2, makes compound, normal temperature precompressed after raw material is mixed; Wherein raw material comprises described polyurethane foam particle, described short spandex thread, adhesive and water;
Step 3, by hot-forming the compound after step 2 precompressed, makes compound polyurethane material.
2. method according to claim 1, other are characterised in that, the raw material in step 2, according to weight percent meter, comprising:
Polyurethane foam particle 80～100%;
Short spandex thread 0～20%;
Adhesive 5～15%;
Water 1～4%.
3. method according to claim 1, other are characterised in that, described adhesive is polyurethane adhesive.
4. method according to claim 1, other are characterised in that, and process conditions hot-forming in step 3 are: pressure is 60～150bar, and temperature is 80～160 DEG C, and the time is 5～25min.
5. method according to claim 1, other are characterised in that, the diameter of the polyurethane foam particle that step 1 obtains is 1～5mm.
6. method according to claim 1, other are characterised in that, the short spandex thread length that step 1 obtains is 1～5cm.
7. method according to claim 1, other are characterised in that, in step 2, before compound precompressed and precompressed aspect ratio be afterwards 3:1～4:1.
8. method according to claim 1, other are characterised in that, described compound polyurethane material is sheet material, sheet material, tubing, film, profile shapes.
9. method according to claim 1, other are characterised in that, also comprise post-processing step: the compound polyurethane material making is carried out to sanding and/or cutting process.
10. the compound polyurethane material that described in claim 1, method makes, other are characterised in that, described compound polyurethane material is sheet material, sheet material, tubing, film, profile shapes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310143668.7A CN104118075A (en) | 2013-04-24 | 2013-04-24 | Method for recycling waste rigid polyurethane foam plastics and waste spandex filaments |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310143668.7A CN104118075A (en) | 2013-04-24 | 2013-04-24 | Method for recycling waste rigid polyurethane foam plastics and waste spandex filaments |
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| CN104118075A true CN104118075A (en) | 2014-10-29 |
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| CN201310143668.7A Pending CN104118075A (en) | 2013-04-24 | 2013-04-24 | Method for recycling waste rigid polyurethane foam plastics and waste spandex filaments |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106273074A (en) * | 2016-08-15 | 2017-01-04 | 浙江首想科技有限公司 | A kind of waste and old sponge reprocessing technique of band anion |
| CN108544692A (en) * | 2018-04-18 | 2018-09-18 | 北京星和众维科技股份有限公司 | A kind of method of recycling luggage leftover bits and pieces and prepared liner plate and application |
| CN109517363A (en) * | 2018-11-12 | 2019-03-26 | 金陵科技学院 | A kind of nylon fiber enhancing compound polyurethane material and preparation method thereof |
| CN111497054A (en) * | 2020-05-07 | 2020-08-07 | 安徽森泰木塑集团股份有限公司 | Production method of polyurethane foam powder solid waste particles |
| WO2021181227A1 (en) * | 2020-03-12 | 2021-09-16 | Rios Londono Juan Guillermo | Method and compacted product obtained from mixed polymer material |
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| CN102219888A (en) * | 2011-05-30 | 2011-10-19 | 上海联景高分子材料有限公司 | Process for manufacturing thermoplastic urethane (TPU) by utilizing waste spandex fiber |
| CN102229698A (en) * | 2011-05-12 | 2011-11-02 | 江苏久久防水保温隔热工程有限公司 | Method for making heat insulation board by using hard polyurethane foamed waste |
| CN102796279A (en) * | 2012-08-16 | 2012-11-28 | 上海翌能化工科技有限公司 | Method for recovery of polyurethane through alcoholysis |
| CN103012717A (en) * | 2012-11-28 | 2013-04-03 | 浙江华峰新材料股份有限公司 | Technology of producing decoration composite board by utilizing spandex fiber waste and polyurethane incubation waste |
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2013
- 2013-04-24 CN CN201310143668.7A patent/CN104118075A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102229698A (en) * | 2011-05-12 | 2011-11-02 | 江苏久久防水保温隔热工程有限公司 | Method for making heat insulation board by using hard polyurethane foamed waste |
| CN102219888A (en) * | 2011-05-30 | 2011-10-19 | 上海联景高分子材料有限公司 | Process for manufacturing thermoplastic urethane (TPU) by utilizing waste spandex fiber |
| CN102796279A (en) * | 2012-08-16 | 2012-11-28 | 上海翌能化工科技有限公司 | Method for recovery of polyurethane through alcoholysis |
| CN103012717A (en) * | 2012-11-28 | 2013-04-03 | 浙江华峰新材料股份有限公司 | Technology of producing decoration composite board by utilizing spandex fiber waste and polyurethane incubation waste |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106273074A (en) * | 2016-08-15 | 2017-01-04 | 浙江首想科技有限公司 | A kind of waste and old sponge reprocessing technique of band anion |
| CN108544692A (en) * | 2018-04-18 | 2018-09-18 | 北京星和众维科技股份有限公司 | A kind of method of recycling luggage leftover bits and pieces and prepared liner plate and application |
| CN109517363A (en) * | 2018-11-12 | 2019-03-26 | 金陵科技学院 | A kind of nylon fiber enhancing compound polyurethane material and preparation method thereof |
| WO2021181227A1 (en) * | 2020-03-12 | 2021-09-16 | Rios Londono Juan Guillermo | Method and compacted product obtained from mixed polymer material |
| CN111497054A (en) * | 2020-05-07 | 2020-08-07 | 安徽森泰木塑集团股份有限公司 | Production method of polyurethane foam powder solid waste particles |
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Application publication date: 20141029 |
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