CN101385921A - No-weaving filter composite material of feather fiber and preparation method thereof - Google Patents

No-weaving filter composite material of feather fiber and preparation method thereof Download PDF

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Publication number
CN101385921A
CN101385921A CNA2008100413545A CN200810041354A CN101385921A CN 101385921 A CN101385921 A CN 101385921A CN A2008100413545 A CNA2008100413545 A CN A2008100413545A CN 200810041354 A CN200810041354 A CN 200810041354A CN 101385921 A CN101385921 A CN 101385921A
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feather
woven
composite material
fiber
filter composite
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CNA2008100413545A
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俞镇慌
刘莲
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Donghua University
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Donghua University
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Abstract

The invention relates to a non-woven feather fiber filtering composite material and a preparation method thereof, comprising: a layer of non-woven feather fabric (3) and two layers of non-woven unbound fabric (4), which are all compounded by machine; and the preparation method comprises steps as follows: (1) feather fiber (1) and bi-component fiber (2) are mixed evenly according to a mass proportion of 1-2.5:1 and fed into a air-laid web-forming machine to obtain a non-woven feather fiber web (9) which is then directly fed into a needle machine to be reinforced by needling and a fiber web (21) is obtained; and (2) the fiber web (21) directly enters a hot-air oven to be reinforced by hot melting and a non-woven feather fabric (3) is obtained, and the non-woven feather fabric (3) is compounded up and down with a layer of non-woven unbound fabric (4) and then wound into shape by a winding device to obtain the non-woven filtering composite material (5). The non-woven filtering material has good uniformity, no fiber loosing, certain degree of tensile strength and tearing strength and good filtering performance, can adsorb heavy metals, dyes, oil stains, organic solvents and other harmful substances, and the preparation method is simple.

Description

Weaving filter composite material of a kind of feather fiber and preparation method thereof
Technical field
The invention belongs to non-woven composite and preparation field thereof, particularly relate to weaving filter composite material of a kind of feather fiber and preparation method thereof.
Background technology
China is the production and the big trading nation of eider down, feather and goods thereof, and eider down, feather resource are very abundant, and annual production reaches more than 60 ten thousand tons, and the domestic market scale that has formed 30,000,000,000 yuan accounts for 60% of Gross World Product.At present, be widely used as warming packing material though account for the eider down of total feather weight 20% greatly, remaining a large amount of feather fibers are used as offal treatment, have only utilizing of 3-5% at present, main as inserts, shuttlecock and handicraft, minority is extracted protein and is made fertilizer.Research and development to feather and goods thereof both at home and abroad also rest on the rough machined level of raw material.
Feather can be divided into front wing, down and filoplume by its form, function.Fibrous down is meant and is made of single pinnule, the pinnule of separating from the rhachis of the suede of down nuclear and fine hair is called as staple, staple softness, very thin, the rhachis root of feather also has many softnesses, very thin pinnule in addition, and this pinnule is also referred to as staple after rhachis separates; The pinnule thick and stiff than staple that the front wing workprint distributes is called as the plumage silk after rhachis separates, the plumage silk is straight not to curl, the external structure of staple and plumage silk is to be distributed with floss by the about 50mm in the every interval of the mobile jib of pinnule to be called the plumage sprig, and be distributed with tubercle and thorn on the plumage sprig, because these existence, make the difference of feather fiber and common textile fibers be that the surface is furnished with many ultra-fine, short fiber fine hair with the form of division again, make the pinnule surface have unique velvet, plumage silk and staple are fluffy diffusing state, and cohesive force is poor.Analyze from length and powerful elongation, plumage silk and staple have certain spinnability, but feather fiber has the configuration of surface that is different from the mammal wool fibre fully, do not have tangible scale layer, the texture that has only vertical arrangement of height fluctuating, thereby there is not the fulling milling phenomenon in feather fiber, is fluffy diffusing state, it is few to curl, the static height, these are unfavorable for the obvolvent of fiber, the difficulty of spinning cotton and weaving cloth is bigger.If become net with feather by nonwovens process merely, powerful low, to fall Mao Feimao serious, feasibility is very little.That feather is gathered into net is in blocks so improve nonwovens process, becomes utilizable non-woven material.
Concerning the character of feather own, feather can well adsorb metal ions such as the heavy metal ion, calcium magnesium of water and harmful dyestuff such as peacock green, indigo FCF; Down and Feather also can make the greasy dirt of absorption and the purpose that water-insoluble organic solvent moment gelation reaches removal.Feather nonwoven material is used for sewage and waste water filters, can well dispose harmful substance.
The CN1792833 patent disclosure purposes of a kind of eider down in the water-insoluble organic solvent prevention and cure of pollution, utilize eider down to make this suction of water-insoluble organic solvent moment gelation of absorption coagulate characteristic exactly, be applied to prepare the purification separation material that the control water-insoluble organic solvent pollutes usefulness.Eider down can be inhaled all kinds of water-insoluble organic solvents that coagulate 35~40 times of own wts, gelation process 2~10 seconds, and the separable recovery solvent in back is coagulated in saturated suction, scavenging material regeneration.China's eider down, feather aboundresources both can be administered the water body, water source or the mud that pollute or polluting after being processed into scavenging material, can be used as the strategic reserves goods and materials again, and the end treatment that organic solvent is polluted becomes the source prevention and control.
The CN1792834 patent disclosure purposes of a kind of eider down in greasy dirt control, utilize eider down to make all kinds of mineral oil of absorption and this suction of edible oil moment gelation coagulate characteristic, being applied to prepare control has useless exotic material.China's eider down, feather aboundresources both can be administered the water body, water source or the mud that pollute or polluting after being processed into scavenging material, can be used as the strategic reserves goods and materials again, and the end treatment that organic solvent is polluted becomes the source prevention and control.
The CN02115366 patent disclosure a kind of non-weaving cloth of making by the fibrous feather down that curls, this fibrous feather down is that pinnule mobile jib, the plumage sprig on the pinnule mobile jib, the tubercle on the plumage sprig and/or the thorn by its curling shape twines obvolvent each other or twine the bonding formation of obvolvent; The manufacture craft of curling shape eider down: fibrous feather down preparation → chemical tendering degenerative treatments and/or machinery are rubbed curling modification → squash type thermal finalization → typing crimped fibre shape feather down, are processed into the non-weaving cloth that curling fibrous feather down is made by nonwovens process then; The non-weaving cloth that feather down of the present invention is made has good springiness, good evenness, surfacing, water-fastly washes, do not fall hair, does not bore hair, heat-insulating property height, characteristics that tensile strength is big.
CN1570273 the invention provides a kind of technology of utilizing poultry feather to produce specialties, its main contents comprise that adopting feather fiber is primary raw material, join by certain proportion and plant fiber pulp and to copy, thereby produce the technological process that can be applied to multiduty specialties.Technology and the existing paper technology that utilizes poultry feather to produce specialties of the present invention compared, have into that the paper air permeability is better, filterability is better, both made full use of waste resource, turn waste into wealth, reduce environmental pollution, can save wood pulp again, reduce cost, can also reduce the timber felling, meet characteristics such as current environmental protection requirement, thereby, have good value for applications.
Different with patent of invention in the past is, feather of the present invention does not pass through specially treated, the direct exactly plumage silk that separates from feather, and sneaked into bicomponent fibre and become net together, the feather nonwoven cloth that obtains is each compound one deck non-weaving cloth up and down, makes the feather nonwoven filtering material that makes have good strainability and the property that is adsorbed with harmful substances.
Summary of the invention
Technical problem to be solved by this invention provides weaving filter composite material of a kind of feather fiber and preparation method thereof, this non-woven filter material good evenness, do not fall the hair, certain tensile strength is arranged and tears harmful substances such as brute force, good, the adsorbable heavy metal of strainability, dyestuff, greasy dirt and organic solvent, the preparation method is simple.
The weaving filter composite material of a kind of feather fiber of the present invention, its composition comprises: one deck feather nonwoven cloth (3) and two-layer spun-bonded non-woven (4), they are that machinery is compound.
Described weaving filter composite material is by one deck spun-bonded non-woven (4), one deck feather nonwoven cloth (3), and one deck spun-bonded non-woven (4) is made.
Described feather nonwoven cloth (3) grammes per square metre scope is 150-250g/m 2
Described spun-bonded non-woven (4) is selected polypropylene fibre, terylene spun-bonded or fusion spray cloth for use or is had certain brute force and permeability, can stop the non-weaving cloth of strainabilities such as impurity, purification medium.
The preparation method of the weaving filter composite material of a kind of feather fiber of the present invention comprises:
(1) feather fiber (1) and bicomponent fibre (2) evenly mix according to the mass ratio of 1~2.5:1, feeding Rando random web-laying equipment, air lay obtains feather nonwoven fibre web (9), directly enters needing machine again and carries out pinprick reinforcement, acupuncture road number is the 2-4 road, obtains fibre web (21);
(2) above-mentioned fibre web (21) directly enters hot-air oven, reinforced 5-10 minute at 120~130 ℃ of hot melts, obtain feather nonwoven cloth (3), up and down each compound one deck spun-bonded non-woven (4), with coiler device (23) coiling and molding, obtain weaving filter composite material (5).
Described step (1) mesoptile fiber (1) is the plumage silk that directly separates impurity elimination from chicken, duck, goose, peacock or ostrich poultry feather accessory pinna without specially treated.
Bicomponent fibre (2) is PET (PET) bicomponent fibre or polyethylene (PE)/polypropylene (PP) ES bicomponent fibre in the described step (1), and wherein, the fusing point of low-melting point PET fiber is at the 110-200 degree.
Compound in the described step (2) is that machinery is compound, and set composite (25) is a pair of pressure roller, and rolling of top and bottom rolls is vertical stripe all a little, and rolls a little corresponding.
Non-weaving cloth is consistent with the direction of feather nonwoven cloth, all identical with set composite (25) outbound course in the described step (2).
A kind of feather fiber of the present invention (1) mixes the feather nonwoven cloth (3) of bicomponent fibre (2), each compound one deck non-weaving cloth (4) up and down then, make weaving filter composite material (5), can do good filtering material after compound, can change the thickness and the density of fibre web in the turnover speed of Rando random web-laying equipment by changing fibre web, can also regulate the acupuncture performance that acupuncture road number, needling density, turnover net spee change fibre web.It is characterized in that: feather layer (3) in the middle of this non-woven material, the feather main body is plumage silk (1), it and bicomponent fibre (2) twine obvolvent by nonwovens process and are bonded together, and bicomponent fibre (2) supports feather layer (3), is the skeleton of this non-weaving cloth (3).Each compound one deck non-weaving cloth (4) up and down then, make weaving filter composite material (5), this material good evenness, do not fall the hair, certain tensile strength is arranged and tears brute force and good strainability, be weaving filter composite material with harmful substance properties such as adsorbable heavy metal, dyestuff, greasy dirt and organic solvents.
Fig. 3 is air lay of the present invention and needling process flow process.Feather fiber (1) and bicomponent fibre (2) are after shredding, removal of impurities, mixing, and feeding air-flow machine by the licker-in (7) of feeding roller (6) feeding high speed rotary, is further combed into ultimate fibre.Licker-in (7) centrifugal rely on oneself and the synergy of air-flow (8) under, fiber comes off from sawtooth, carries by air-flow, condenses upon on the lace curtaining (10), forms fibre web (9).Fibre web draws (12) and defeated lace curtaining (11) to grip feeding acupuncture district by pressing to enlist the services of.The acupuncture district is made up of stripping web plate (13), holder web plate (14) and needle plate (15) etc.Holder web plate (14) plays the effect of holding fibre web, bears the acupuncture power in the acupuncture course; Acupuncture is finished puncture and is processed when doing drawback movement, because frictional force can be with fibre web to move together, utilize stripping web plate (13) to block fibre web (9), acupuncture (16) is successfully withdrawed from from fibre web, so that fibre web is done feed motion, therefore shelling web plate (13) works to peel off fibre web.All have in holder web plate (14) and stripping web plate (13) and the corresponding eyelet in acupuncture (16) position so as acupuncture (16) pass through.In acupuncture course, the motion of fibre web is sent out by pulling roll (17).Fig. 4 is a plain net hot blast adhesion technology.Fibre web (21) enters hot blast adhesion, after heat exchanger (19) heating, the hot blast of heating (20) is blown into from baking oven top, is extracted out by the blower fan (18) of lower lateral after passing fibre web, enter baking oven again after heater via (19) heating then, hot-air is periodic duty.The abundant bonding reinforcing of fibre web obtains feather nonwoven cloth (3).Fig. 5 is the combination process production procedure.The spun-bonded non-woven (4) that take-off device (22) unwinding is got off at first passes through guide roller (24), and the effect of guide roller (7) is that the angle of feather nonwoven cloth (3) and spun-bonded non-woven (4) is diminished, thereby is more conducive to compound.Then, to carry out machinery at set composite (25) compound spinning feather nonwoven cloth (3) and spun-bonded non-woven (4), makes feather nonwoven filter composite material (5), by coiler device (23) coiling and molding.
Beneficial effect
(1) feather fiber and meldable fibre tangle by nonwovens process such as acupuncture, hot melt reinforcings and are bonded together, and form feather nonwoven material, have overcome feather and have been difficult for the shortcoming that obvolvent is difficult for weaving, the utilization that has strengthened feather;
(2) the compound feather nonwoven filter composite material that obtains of feather nonwoven material and spun-bonded non-woven, this material good evenness, do not fall the hair, certain tensile strength is arranged and tears brute force, have good strainability;
(3) compare with common chemical fiber filtering material, the feather material has the property of harmful substances such as metal ions such as adsorbable heavy metal, dyestuff, calcium, magnesium, greasy dirt and organic solvent.
Description of drawings
Fig. 1 forms schematic diagram for the structure that feather fiber mixes the feather nonwoven cloth of low-melting point PET bicomponent fibre preparation;
Fig. 2 is the schematic diagram of feather nonwoven cloth and the compound feather nonwoven filter composite material that obtains of spun-bonded non-woven;
Fig. 3 is air lay of the present invention and needling process flow chart;
Fig. 4 is a hot blast adhesion process chart of the present invention;
Fig. 5 is a combination process flow chart of the present invention.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
This feather nonwoven cloth is made of feather fiber (1) and low-melting point PET bicomponent fibre (2).Feather fiber (1) and low-melting point PET bicomponent fibre (2) tentatively mix with the mass ratio of 70:30, damping is also refueled and is removed static, again through shredding, impurity elimination, mixing, feed Rando air lay instrument then and form fibre web, regulate network access feeding roller (6) and go out net and become the speed change web density of lace curtaining (10) at 150-200g/m 2Between, as Fig. 3.Fibre web is sent into needing machine, and acupuncture road number is set at 2 roads, as Fig. 3.Insert hot air type baking oven such as Fig. 4 again, hot melting temperature is 120 degree, and the bonding time is 5 minutes.As Fig. 5, spun-bonded non-woven is consistent with the direction of feather nonwoven cloth in the set composite, and is all identical with the machine outbound course.
Embodiment 2
This feather nonwoven cloth is made of feather fiber (1) and low-melting point PET bicomponent fibre (2).Feather (1) and low-melting point PET bicomponent fibre (2) tentatively mix with the mass ratio of 60:40, damping is also refueled and is removed static, again through shredding, impurity elimination, mixing, feed Rando air lay instrument then and form fibre web, regulate network access feeding roller (6) and go out net and become the speed change web density of lace curtaining (10) at 150-220g/m 2Between, as Fig. 3.Fibre web is sent into needing machine, and acupuncture road number is set at 3 roads, as Fig. 3.Insert hot air type baking oven such as Fig. 4 again, hot melting temperature is 130 degree, and the bonding time is 5 minutes.As Fig. 5, spun-bonded non-woven is consistent with the direction of feather nonwoven cloth in the set composite, and is all identical with the machine outbound course.
Embodiment 3
This feather nonwoven cloth is made of feather fiber (1) and low-melting point PET bicomponent fibre (2).Feather (1) and low-melting point PET bicomponent fibre (2) tentatively mix with the mass ratio of 50:50, damping is also refueled and is removed static, again through shredding, impurity elimination, mixing, feed Rando air lay instrument then and form fibre web, regulate network access feeding roller (6) and go out net and become the speed change web density of lace curtaining (10) at 180-250g/m 2Between, as Fig. 3.Fibre web is sent into needing machine, and acupuncture road number is set at 4 roads, as Fig. 3.Insert hot air type baking oven such as Fig. 4 again, hot melting temperature is 130 degree, and the bonding time is 10 minutes.As Fig. 5, spun-bonded non-woven is consistent with the direction of feather nonwoven cloth in the set composite, and is all identical with the machine outbound course.
More than three feather nonwoven cloth (4) that example obtains, overall these three kinds of products relatively, the feather utilization rate of example 1 is the highest, the properties of product of example 3 are better, powerful maximum, net is the most even, it is minimum to fall hair, example 2 falls between.

Claims (9)

1. the weaving filter composite material of a feather fiber, its composition comprises: one deck feather nonwoven cloth (3) and two-layer spun-bonded non-woven (4), they are that machinery is compound.
2. the weaving filter composite material of feather fiber according to claim 1, it is characterized in that: described weaving filter composite material is by one deck spun-bonded non-woven (4), one deck feather nonwoven cloth (3), one deck spun-bonded non-woven (4) is made.
3. the weaving filter composite material of feather fiber according to claim 1 and 2, it is characterized in that: described feather nonwoven cloth (3) grammes per square metre scope is 150-250g/m 2
4. the weaving filter composite material of feather fiber according to claim 1 and 2, it is characterized in that: described spun-bonded non-woven (4) is selected polypropylene fibre, terylene spun-bonded or melt-blowing nonwoven for use.
5. the preparation method of the weaving filter composite material of a feather fiber comprises:
(1) feather fiber (1) and bicomponent fibre (2) evenly mix according to the mass ratio of 1~2.5:1, feeding Rando random web-laying equipment, air lay obtains feather nonwoven fibre web (9), directly enters needing machine again and carries out pinprick reinforcement, and acupuncture road number is the 2-4 road;
(2) above-mentioned fibre web (21) directly enters hot-air oven, reinforced 5-10 minute at 120~130 ℃ of hot melts, obtain feather nonwoven cloth (3), up and down each compound one deck spun-bonded non-woven (4), with coiler device (23) coiling and molding, obtain weaving filter composite material (5).
6. the preparation method of the weaving filter composite material of feather fiber according to claim 5, it is characterized in that: described step (1) mesoptile fiber (1) is the plumage silk that directly separates impurity elimination from chicken, duck, goose, peacock or ostrich poultry feather accessory pinna without specially treated.
7. the preparation method of the weaving filter composite material of feather fiber according to claim 5, it is characterized in that: bicomponent fibre (2) is PET (PET) bicomponent fibre or polyethylene (PE)/polypropylene (PP) ES bicomponent fibre in the described step (1), wherein, the fusing point of low-melting point PET fiber is at the 110-200 degree.
8. the preparation method of the weaving filter composite material of feather fiber according to claim 5, it is characterized in that: compound in the described step (2) for mechanical compound, set composite (25) is a pair of pressure roller, and rolling of top and bottom rolls is vertical stripe all a little, and rolls a little corresponding.
9. the preparation method of the weaving filter composite material of feather fiber according to claim 5 is characterized in that: non-weaving cloth is consistent with the direction of feather nonwoven cloth, all identical with set composite (25) outbound course in the described step (2).
CNA2008100413545A 2008-08-04 2008-08-04 No-weaving filter composite material of feather fiber and preparation method thereof Pending CN101385921A (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011082603A1 (en) * 2010-01-08 2011-07-14 安徽羽冠生态环境材料有限责任公司 Selective absorption material with composite structure
CN102173141A (en) * 2010-12-31 2011-09-07 江阴协统汽车附件有限公司 Nonwoven composite material for automobile interior trim and preparation method thereof
CN102582144A (en) * 2012-01-20 2012-07-18 东华大学 Composite melt-blown filter core material filled with feather fiber, and preparation device and method thereof
CN103298989A (en) * 2010-10-29 2013-09-11 安徽羽冠生态环境材料有限责任公司 Industrial production method for preparing oil absorption cloth with feather
CN103458987A (en) * 2011-03-30 2013-12-18 株式会社可乐丽 Filtering medium for filter, and water filtering apparatus provided with filtering medium
CN104246079A (en) * 2012-03-11 2014-12-24 俞镇慌 Feather oil absorbent boom structure and preparation method therefor
CN106474823A (en) * 2016-12-28 2017-03-08 怀宁县菲豹服饰有限公司 A kind of feather nonwoven composite acupuncture filtering material as height containing Treatment of Sludge and preparation method thereof
CN106621569A (en) * 2016-12-28 2017-05-10 怀宁县菲豹服饰有限公司 Feather non-woven composite needle-punched filter material used for sewage treatment and preparation method thereof
CN106731227A (en) * 2016-12-28 2017-05-31 怀宁县菲豹服饰有限公司 A kind of sewage disposal titanium dioxide/feather nonwoven composite acupuncture filtering material and preparation method thereof
CN107351472A (en) * 2017-06-24 2017-11-17 常州市雪宜物资有限公司 A kind of preparation method of non-woven geotextile
US20190060811A1 (en) * 2017-08-28 2019-02-28 Ronie Reuben Down feather filter medium
CN110325677A (en) * 2016-12-08 2019-10-11 罗尼·鲁本 Composite eiderdown sheet material with elastic adhesive net
CN114687063A (en) * 2020-12-30 2022-07-01 无锡市正龙无纺布有限公司 Preparation method of laminated range hood filter screen
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Cited By (22)

* Cited by examiner, † Cited by third party
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WO2012055264A1 (en) * 2010-01-08 2012-05-03 安徽羽冠生态环境材料有限责任公司 Industrial production method for preparing oil absorption cloth with feather
WO2011082603A1 (en) * 2010-01-08 2011-07-14 安徽羽冠生态环境材料有限责任公司 Selective absorption material with composite structure
CN103298989A (en) * 2010-10-29 2013-09-11 安徽羽冠生态环境材料有限责任公司 Industrial production method for preparing oil absorption cloth with feather
CN103298989B (en) * 2010-10-29 2015-06-10 俞镇慌 Industrial production method for preparing oil absorption cloth with feather
CN102173141B (en) * 2010-12-31 2013-10-16 江阴协统汽车附件有限公司 Nonwoven composite material for automobile interior trim and preparation method thereof
CN102173141A (en) * 2010-12-31 2011-09-07 江阴协统汽车附件有限公司 Nonwoven composite material for automobile interior trim and preparation method thereof
CN103458987A (en) * 2011-03-30 2013-12-18 株式会社可乐丽 Filtering medium for filter, and water filtering apparatus provided with filtering medium
CN103458987B (en) * 2011-03-30 2015-06-03 株式会社可乐丽 Filtering medium for filter, and water filtering apparatus provided with filtering medium
CN102582144A (en) * 2012-01-20 2012-07-18 东华大学 Composite melt-blown filter core material filled with feather fiber, and preparation device and method thereof
CN102582144B (en) * 2012-01-20 2015-05-13 东华大学 Composite melt-blown filter core material filled with feather fiber, and preparation device and method thereof
CN104246079A (en) * 2012-03-11 2014-12-24 俞镇慌 Feather oil absorbent boom structure and preparation method therefor
CN104246079B (en) * 2012-03-11 2016-01-20 俞镇慌 A kind of feather oil-absorption fence structure and preparation method thereof
CN110325677A (en) * 2016-12-08 2019-10-11 罗尼·鲁本 Composite eiderdown sheet material with elastic adhesive net
CN106621569A (en) * 2016-12-28 2017-05-10 怀宁县菲豹服饰有限公司 Feather non-woven composite needle-punched filter material used for sewage treatment and preparation method thereof
CN106731227A (en) * 2016-12-28 2017-05-31 怀宁县菲豹服饰有限公司 A kind of sewage disposal titanium dioxide/feather nonwoven composite acupuncture filtering material and preparation method thereof
CN106474823A (en) * 2016-12-28 2017-03-08 怀宁县菲豹服饰有限公司 A kind of feather nonwoven composite acupuncture filtering material as height containing Treatment of Sludge and preparation method thereof
CN107351472A (en) * 2017-06-24 2017-11-17 常州市雪宜物资有限公司 A kind of preparation method of non-woven geotextile
CN107351472B (en) * 2017-06-24 2019-12-17 仪征市众兴土工合成材料有限公司 Preparation method of non-woven geotextile
US20190060811A1 (en) * 2017-08-28 2019-02-28 Ronie Reuben Down feather filter medium
US10821384B2 (en) * 2017-08-28 2020-11-03 Ronie Reuben Down feather filter medium
CN114687063A (en) * 2020-12-30 2022-07-01 无锡市正龙无纺布有限公司 Preparation method of laminated range hood filter screen
WO2024047349A1 (en) 2022-08-31 2024-03-07 Aeropowder Limited Oil-absorbent materials

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