GB2629537A

GB2629537A - Down feather separation production process

Info

Publication number: GB2629537A
Application number: GB2410727.8A
Authority: GB
Inventors: Li Lingang; Yu Jingui; ZHU Yelong; Yu Xueyong; Qin Yu
Original assignee: Luan Fengyu Environmental Protection Tech Co Ltd; Sea Feather Ltd Co Of Luan; West Anhui University
Current assignee: Luan Fengyu Environmental Protection Tech Co Ltd; Sea Feather Ltd Co Of Luan; West Anhui University
Priority date: 2021-12-27
Filing date: 2022-12-22
Publication date: 2024-10-30
Also published as: CN114411269A; GB202410727D0; WO2023125218A1; ZA202405702B

Abstract

A down feather separation production method, and down feathers obtained thereby. The method comprises the following steps: S1, carrying out dust removal on a down feather raw material by using a first-stage dust removal device, so as to obtain a first-stage raw material after same has been subjected to dust removal; S2, feeding the first-stage raw material into a washing machine, washing same with a washing liquid at 30-40ºC until a filtrate is clear, washing same with water once more, and then feeding same into a water removal apparatus for water removal, so as to obtain a second-stage raw material; S3, feeding the second-stage raw material into a dryer for drying, so as to obtain a third-stage raw material; and S4, feeding the third-stage raw material into a second-stage dust removal device, so as to obtain a fourth-stage raw material after same has been subjected to dust removal, removing impurities from the fourth-stage raw material, and then feeding same into a feather separator for a feather separation treatment. The method overcomes the defects in the prior art; and the production method is thorough in terms of dust removal, and the washed down feathers are soft and highly fluffy, thereby effectively improving the quality of the down feathers.

Description

DOWN FEATHER SEPARATION PRODUCTION PROCESS

[0001] The present application claims the priority of Chinese Patent Application No. CN202111614028.0 filed with the China National Intellectual Property Administration on December 27, 2021, and entitled "Down feather separation production process", the entire content of which is incorporated by reference in the present application.

TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of down feather processing, in particular to a method for feather separation of down feathers.

BACKGROUND

[0003] Down feathers are mixture of feathers and down. Feathers are feather pieces, play a supporting role in the down feathers, and could make the down feathers rebound quickly. Down is down cluster, which is the noumenon and value of the down feathers. The down cluster is a three-dimensional ball with a flower-like structure consisting of a down core and many radial down fibers. Therefore, the down feathers are filled into duvets and down jackets as warm-keeping materials. However, from raw materials to filling quilts and clothes, the down feathers need to go through the processes of dust removal, washing, drying and feather separation. However, the filling power of the down feathers produced by the existing down feather separation processing technology is poor. In order to improve the filling power and quality, subsequent treatment is needed, leading to the increase of the production difficulty and cost.

SUMMARY

[0004] An object of the present disclosure is to provide a method for feather separation of down feathers, which overcomes the disadvantages in the prior art.

[0005] To solve the technical problem above, the present disclosure provides the following technical solution: [0006] A method for feather separation of down feathers, including the following steps: [0007] SI, subjecting a down feather raw material to dust removal by using a first-stage dust removal device to obtain a first-stage raw material; [0008] S2, feeding the first-stage raw material into a washing machine, cleaning the first-stage raw material with a washing liquid at a temperature of 30-40 °C until a filtrate is clear, and then washing the first-stage raw material with water one time; and feeding a resulting material into a dehydrating apparatus, and performing dehydrating to obtain a second-stage raw material; [0009] S3, feeding the second-stage raw material into a dryer, and drying the second-stage raw material to obtain a third-stage raw material; and 100101 S4, feeding the third-stage raw material into a second-stage dust removal device, and performing dust removal to obtain a fourth-stage raw material; and subjecting the fourth-stage raw material to impurity removal, and then feeding a resulting material into a feather separator and performing feather separation treatment.

[0011] In some embodiments, the impurity removal of the fourth-stage raw material is performed by attraction of a strong magnet to remove ferromagnetic impurities in the fourth-stage raw material.

[0012] In some embodiments, a mass ratio of the first-stage raw material to the washing liquid is in a range of 1: 800 to 1: 1200.

[0013] In some embodiments, the washing liquid is an aqueous solution containing 8-15 wt% of a detergent.

[0014] In some embodiments, the detergent is prepared from the following raw materials in parts by weight: 1-2 parts of octadecylamine polyoxyethylene ether, 3-4 parts of sodium methyl cocoyl taurate, 3-4 parts of sodium laurate, 2-3 parts of tridecafluorooctyltriethoxysilane, and 1-2 parts of polyethyleneglycol monooleate. Octadecylamine polyoxyethylene ether, sodium methyl cocoyl taurate, sodium laurate and polyethyleneglycol monooleate could play an effective role in emulsifying and surfactant, such that the dust on the surface of the down feathers could be well removed, and the number of washing times could be reduced. Meanwhile, the octadecylamine polyoxyethylene ether and the sodium methyl cocoyl taurate could effectively improve the softness of the down feathers and avoid the problem of hardness of the down feathers after washing. Tridecafluorooctyltriethoxysilane is hydrolyzed to form active silanol after being dissolved in water, and the active silanol is bonded with oxygen-containing functional groups on the surface of the down feathers to form fluorine-containing groups on the surface of the down feathers, thus changing the properties of the surface of the down feathers and improving the filling power of the down feathers.

[0015] In some embodiments, the second-stage dust removal device used in step S4 includes a box body 1, where a dust removal mechanism is installed in the box body 1, a control panel 7 is installed on the box body 1, a discharge box 11 is connected to a bottom of the box body 1, and an inside of the box body 1 is communicated with the discharge box 11. The dust removal mechanism includes a screen 5, where the screen 5 is enclosed around, and is internally provided with a dust removal space. The screen 5 is fixedly installed in the box body 1, and a dust removal cavity is formed between the screen 5 and an inner wall of the box body 1. A dust removal motor 2 is installed on a right side of the box body 1. The dust removal motor 2 is electrically connected to the control panel 7. A supporting rod 21 is connected to a rotating shaft of the dust removal motor 2, both ends of the supporting rod 21 are rotatably installed on the box body 1, and the supporting rod 21 penetrates through the screen 5. Multiple branch rods 22 are arranged on a surface of the supporting rod 21 in the screen 5. The branch rods 22 are free from making contact with the screen 5. A top of the box body 1 is provided with an induced draft fan 13 electrically connected to the control panel 7, and the induced draft fan 13 is communicated with the dust removal cavity. A left end of the screen 5 is provided with a discharge port, and the discharge port is connected to a discharge pipe 14 installed on the box body 1. An axial flow fan electrically connected to the control panel 7 is further installed on the discharge pipe 14. A right end of the screen 5 is provided with a feed port, and the feed port is connected to a feed pipe 12 installed on the box body 1.

[0016] A lower portion of a left side face of the box body 1 is provided with an air inlet 16, and the air inlet 16 is communicated with the inside of the screen 5. A cover plate is hinged to the air inlet 16, an electric push rod 4 is hinged to a front edge of the cover plate, a bottom of the electric push rod 4 is hinged to a left side surface of the box body 1, and the electric push rod 4 is electrically connected to the control panel 7.

[0017] The left end of the screen 5 is further provided with a collection port, and a connection pipe 15 is connected to the collection port. The collection pipe 15 is installed on the box body 1, and a globe valve is installed on the collection pipe 15.

[0018] The discharge pipe 14 is further provided with a connecting plate 31 penetrating through the discharge pipe 14, the connecting plate 31 is provided with a circular hole communicating with the discharge pipe 14 on both sides, and an inner diameter of the circular hole is equal to that of the discharge pipe 14. The connecting plate 31 is further provided with a slide hole 32 penetrating through the connecting plate 31, and a height of the slide hole 32 is not less than the inner diameter of the circular hole. An insert plate 33 capable of closing the circular hole is installed in the slide hole 32, and a top end of the insert plate 33 is provided with a circular opening 34. The opening 34 could be overlapped with the circular hole, such that when the insert plate 33 slides in the slide hole 32, the discharge pipe 14 on both sides of the circular hole could be opened and closed.

[0019] A telescopic mechanism 3 is connected to a rear portion of the insert plate 33, and the telescopic mechanism 3 is fixedly installed on a surface of the box body 1, and electrically connected to the control panel 7.

[0020] A screw conveying shaft 61 is rotatably installed in the discharge box 11, a left end of the screw conveying shaft 61 is connected to a discharge motor 6 installed on the discharge box 11, a bottom of the discharge box 11 at a right end of the screw conveying shaft 61 is provided with a dust removal port 18, and a cross section of the discharge box 11 is of an inverted conical structure, and the discharge motor 6 is electrically connected to the control panel 7.

[0021] The dust removal by using the second-stage dust removal device is performed by a process including the following steps: [0022] Sl. an insert plate 33 is pushed by a telescopic mechanism 3 through a control panel 7, such that the insert plate 33 can close a circular hole at a connecting plate 31, thus closing a discharge pipe 14. An induced draft fan 13 and a dust removal motor 2 are started at the same time to make the induced draft fan 13 start working, the suction generated by the induced draft fan 13 makes the air in the screen 5 enter a dust removal cavity and flow out from the induced draft fan 13, such that a negative pressure is generated at a feed pipe 12 to suck down feather raw materials into the screen 5 through the feed pipe 12, and the down feather raw materials entering the screen 5 are hit and stirred by rotating branch rods 22, and dust removal is performed; [0023] S2, dust falling off the down feather raw materials enters the dust removal cavity with the flow of the air in the screen 5. The dust with larger particles settles into a discharge box 11 and is fed to a dust removal port 18 by a screw conveying shaft 61 to be discharged. The dust with smaller particles is discharged from the induced draft fan 13 with the flow of the air in the dust removal cavity. Meanwhile, in the dust removal process, an electric push rod 4 is controlled by the control panel 7 to adjust the opening size of an air inlet 16, such that the air flow rate in the dust removal cavity can be controlled, thereby controlling the air flow rate of the air flowing from the screen 5 to the dust removal cavity; [0024] S3, after dust removal, the induced draft fan 13 is turned off by the control panel 7, and meanwhile, the insert plate 33 is pulled by the telescopic mechanism 3 to make an opening 34 on the insert plate 33 coincide with a circular hole at the connecting plate 31, thus opening the discharge pipe. Then, the air inlet 16 is opened and an axial flow fan is turned on, making the axial flow fan suck away down feather raw materials in the screen 5. After the down feather raw materials in the screen 5 are discharged, the insert plate 33 is pushed by the telescopic mechanism 3 through the control panel 7 to close the circular hole at the connecting plate 31, thus closing the discharge pipe 14. Meanwhile, the air inlet 16 is closed, and the axial flow fan is turned off. The dust removal operation can be continued by repeating above operation.

[0025] Where, step S4 further includes a step of opening a globe valve on the collection pipe to recover the escaped down feathers in the down feather packaging process through the collection pipe 15, and then the globe valve is closed after the recovery is completed.

[0026] Compared with the prior art, the present disclosure has the following implementation effects: [0027] The method according to the present disclosure could remove dust thoroughly, and the washed down feathers are soft and high in filling power, thus effectively improving the quality of the down feathers. Meanwhile, a second-stage dust removal device provided by the present disclosure could effectively separate and filter the dust remaining in the down feathers, and the opening size of the air inlet is adjusted through the control panel 7, thus controlling the air flow rate of the air from the screen 5 flowing into the dust removal cavity. Smaller down clusters are prevented from entering the dust removal cavity, which could avoid the blockage of the screen 5, and improve the amount of the down clusters after feather separation.

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1 is a front view of an embodiment of the present disclosure; [0029] FIG. 2 is a left view of an embodiment of the present disclosure; [0030] FIG. 3 is a schematic diagram of an internal structure of an embodiment of the present disclosure.

[0031] In the drawings: 1 represents a box body; 11 represents a discharge box; 12 represents a feed pipe; 13 represents an induced draft fan; 14 represents a discharge pipe; 15 represents a collection pipe; 16 represents an air inlet; 17 represents a box door; 18 represents a dust removal port; 2 represents a dust removal motor; 21 represents a supporting rod; 22 represents a branch rod; 3 represents a telescopic mechanism; 31 represents a connecting plate; 32 represents a slide hole; 33 represents an insert plate; 34 represents an opening; 4 represents an electric push rod; 5 represents a screen; 6 represents a discharge motor; 61 represents a screw conveying shaft; and 7 represents a control panel.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative efforts shall fall within the scope of the present disclosure.

[0033] In the description of the present disclosure, it needs to be understood that the orientation or positional relationship indicated by terms "upper", "lower", "front", "rear", "left", "right ", "vertical", "inside" and "outside" is based on the orientation or positional relationship shown in the drawings only for convenience of description of the present disclosure and simplification of description rather than indicating or implying that the apparatus or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus are not to be construed as limiting the present disclosure.

[0034] In the description of the present disclosure, unless expressly specified and limited otherwise, the terms "install", "connected" and "connection" should be understood broadly, e.g., may be either a fixed connection or a detachable connection, or an integrated connection; may be a mechanical connection or an electrical connection; may be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood on a case-by-case basis.

[0035] It needs to be noted that the down feather raw material used in the present disclosure is white duck down.

[0036] Example

[0037] A down feather raw material was subjected to dust removal by a first-stage dust removal device to obtain a first-stage raw material. The first-stage raw material was fed into a washing machine and washed with a washing liquid at 30 °C, where a mass ratio of the first-stage raw material to the washing liquid was 1: 1000, the washing liquid was an aqueous solution containing 10 wt% of a detergent, and the detergent was a commercially available detergent. A filtrate was clear after the first-stage raw material was washed six times, and then the first-stage raw material was washed with water once again and then fed to a dehydration apparatus, and subjected to dehydration to obtain a second-stage raw material. The second-stage raw material was fed into a dryer and dried at 60 °C to obtain a third-stage raw material. The third-grade raw material was fed to a second-stage dust removal device to obtain a fourth-stage raw material. Then, a strong magnet was used to attract to remove ferromagnetic impurities in the fourth-stage raw material. The fourth-stage raw material has a filling power of 573 (a filling power of 573 means that the space occupied by each ounce of down feathers was 573 cubic inches), and a good softness. Then, the fourth-stage raw material was fed into a feather separator, and subjected to feather separation to obtain a down cluster. The down cluster has a filling power of 728.

[0038] Example 2

[0039] A down feather raw material was subjected to dust removal by a first-stage dust removal device to obtain a first-stage raw material. The first-stage raw material was fed into a washing machine and washed with a washing liquid at 30 °C, where a mass ratio of the first-stage raw material to the washing liquid was 1: 1000, and the washing liquid was an aqueous solution containing 10 wt% of a detergent. A filtrate was clear after the first-stage raw material was washed five times, and then the first-stage raw material was washed with water once again and then fed to a dehydration apparatus, and subjected to dehydration to obtain a second-stage raw material. The second-stage raw material was fed into a dryer and dried at 60 °C to obtain a third-stage raw material. The third-grade raw material was fed to a second-stage dust removal device to obtain a fourth-stage raw material. Then, a strong magnet was used to attract to remove ferromagnetic impurities in the fourth-stage raw material. The fourth-stage raw material has a filling power of 627, and a good softness. Then, the fourth-stage raw material was fed into a feather separator, and subjected to feather separation to obtain a down cluster. The down cluster has a filling power of 813. The detergent was prepared from the following raw materials in parts by weight: 1 part of octadecylamine polyoxyethylene ether, 3 parts of sodium methyl cocoyl taurate, 3 parts of sodium laurate, 2 parts of tridecafluorooctyltriethoxysilane, and 1 part of polyethyleneglycol monooleate.

100401 Example 3

[0041] A down feather raw material was subjected to dust removal by a first-stage dust removal device to obtain a first-stage raw material. The first-stage raw material was fed into a washing machine and washed with a washing liquid at 40 °C, where a mass ratio of the first-stage raw material to the washing liquid was 1: 800, the washing liquid was an aqueous solution containing 8 wt% of a detergent. A filtrate was clear after the first-stage raw material was washed four times, and then the first-stage raw material was washed with water once again and then fed to a dehydration apparatus, and subjected to dehydration to obtain a second-stage raw material. The second-stage raw material was fed into a dryer and dried at 70 °C to obtain a third-stage raw material. The third-grade raw material was fed to a second-stage dust removal device to obtain a fourth-stage raw material. Then, a strong magnet was used to attract to remove ferromagnetic impurities in the fourth-stage raw material. The fourth-stage raw material has a filling power of 616, and a good softness. Then, the fourth-stage raw material was fed into a feather separator, and subjected to feather separation to obtain a down cluster. The down cluster has a filling power of 822. The detergent was prepared from the following raw materials in parts by weight: 1 part of octadecylamine polyoxyethylene ether, 4 parts of sodium methyl cocoyl taurate, 3 parts of sodium laurate, 2 parts of tridecafluorooctyltriethoxysilane, and 2 parts of polyethyleneglycol monooleate.

[0042] Example 4

[0043] A down feather raw material was subjected to dust removal by a first-stage dust removal device to obtain a first-stage raw material. The first-stage raw material was fed into a washing machine and washed with a washing liquid at 35 °C, where a mass ratio of the first-stage raw material to the washing liquid was 1: 1200, the washing liquid was an aqueous solution containing 15 wt% of a detergent. A filtrate was clear after the first-stage raw material was washed three times, and then the first-stage raw material was washed with water once again and then fed to a dehydration apparatus, and subjected to dehydration to obtain a second-stage raw material. The second-stage raw material was fed into a dryer and dried to obtain a third-stage raw material. The third-grade raw material was fed to a second-stage dust removal device to obtain a fourth-stage raw material after dust removal Then, a strong magnet was used to attract to remove ferromagnetic impurities in the fourth-stage raw material. The fourth-stage raw material has a filling power of 643, and a good softness. Then, the fourth-stage raw material was fed into a feather separator, and subjected to feather separation to obtain a down cluster. The down cluster has a filling power of 852. The detergent was prepared from the following raw materials in parts by weight: 2 parts of octadecylamine polyoxyethylene ether, 4 parts of sodium methyl cocoyl taurate, 3 parts of sodium laurate, 3 parts of tridecafluorooctyltriethoxysilane, and 1 part of polyethyleneglycol monooleate.

[0044] Example 5

10045] As a further technical solution of the present disclosure, the second-stage dust removal device used in Examples 1 to 4 was shown in FIG. 1 to FIG. 3, including a box body 1. A dust removal mechanism was installed in the box body 1, a control panel 7 was installed on the box body 1, a discharge box 11 was connected to the bottom of the box body 1, and the inside of the box body 1 was communicated with the discharge box 11. The dust removal mechanism included a screen 5, and a dust removal motor 2. The screen 5 was enclosed around, and a dust removal space was formed inside the screen 5. The screen 5 was fixedly installed in the box body 1, and a dust removal cavity was formed between the screen 5 and an inner wall of the box body 1. A left end of the screen 5 was provided with a discharge port, and the discharge port was connected to a discharge pipe 14 installed on the box body 1. An axial flow fan electrically connected to the control panel 7 was further installed on the discharge pipe 14. The axial flow fan was used to suck away down feather raw materials after dust removal in the screen 5. A right end of the screen 5 was provided with a feed port, and the feed port was connected to a feed pipe 12 installed on the box body 1. The down feather raw materials entered the screen 5 from the feed pipe 12 and were discharged from the discharge pipe 14 after dust removal.

10046] A lower portion of a left side face of the box body 1 was provided with an air inlet 16, and the air inlet 16 was communicated with the inside of the screen 5. A cover plate was hinged to the air inlet 16, an electric push rod 4 was hinged to a front edge of the cover plate, the bottom of the electric push rod 4 was hinged to a left side surface of the box body 1, and the electric push rod 4 was electrically connected to the control panel 7. By adjusting the size of the air inlet 16, the air flow rate in the dust removal cavity can be controlled, such that the air flow rate of air from the screen 5 to the dust removal cavity can be controlled, thereby avoiding the loss of down clusters and easy blockage of the screen 5.

[0047] The left end of the screen 5 was also provided with a collection port, and a connection pipe 15 was connected to the collection port. The collection pipe 15 was installed on the box body 1, and a globe valve was installed on the collection pipe 15. Under the suction of the induced draft fan 13, the down feathers escaped in the packaging process can be recovered through the collection pipe 15 and subjected to dust removal again, which could effectively improve the working efficiency and save resources.

[0048] The dust removal motor 2 was installed on a right side of the box body 1, and was electrically connected to the control panel 7. A supporting rod 21 was connected to a rotating shaft of the dust removal motor 2, both ends of the supporting rod 21 were rotatably installed on the box body 1, and the supporting rod 21 passed through the screen 5. Multiple branch rods 22 were arranged on a surface of the supporting rod 21 in the screen 5, and the branch rods 22 were free from making contact with the screen 5. When the dust removal motor 2 drived the supporting rod 21 to rotate, the branch rods 22 can be used to hit and stir the down feather raw materials in the box body 1, such that the dust on the down feather raw materials can be separated, filtered by the screen 5 and then deposited in the discharge box 11. The top of the box body 1 was provided with an induced draft fan 13 electrically connected to the control panel 7, and the induced draft fan 13 was communicated with the dust removal cavity. The induced draft fan 13 can suck out the dust in the dust removal cavity. Meanwhile, in order to facilitate cleaning the inside of the screen 5 and the box body 1, a front side face and a rear side face of the box body 1 were provided with multiple box doors 17.

[0049] The discharge pipe 14 between the axial flow fan and the box body 1 was also provided with a connecting plate 31 penetrating through the discharge pipe 14. The connecting plate 31 was provided with a circular hole communicating with the discharge pipe 14 on both sides, and an inner diameter of the circular hole was equal to that of the discharge pipe 14. The connecting plate 31 was also provided with a slide hole 32 penetrating through the connecting plate, and a height of the slide hole 32 was not less than the inner diameter of the circular hole. An insert plate 33 capable of closing the circular hole was installed in the slide hole 32, and a top end of the insert plate 33 was provided with a circular opening 34 which can coincide with the circular hole, and an inner diameter of the opening 34 was the same as that of the circular hole, such that the insert plate 33 can open and dose the discharge pipe 14 on both sides of the circular hole when sliding in the slide hole 32. A telescopic mechanism 3 was connected to a rear portion of the insert plate 33, and the telescopic mechanism 3 may employ an electrical servo push rod. The telescopic mechanism 3 was fixedly installed on a surface of the box body 1, and electrically connected to the control panel 7. By moving a position of the insert plate 33 in the slide hole 32, the opening 34 on the insert plate 33 was staggered from the circular hole, thus preventing the down feather raw materials from entering the discharge pipe 14 during dust removal. After dust removal, the insert plate 33 was pulled by the telescopic mechanism 3 to make the opening 34 coincide with the circular hole to connecting the discharge pipe 14 on both sides of the connecting plate, thus discharging the down feathers after dust removal through the discharge pipe 14.

100501 A screw conveying shaft 61 was rotatably installed in the discharge box 11. A left end of the screw conveying shaft 61 was connected to a discharge motor 6 installed on the discharge box 11, and the bottom of the discharge box 11 at a right end of the screw conveying shaft 61 was provided with a dust removal port 18. The cross section of the discharge box 11 was of an inverted conical structure, and the discharge motor 6 was electrically connected to the control panel 7. The screw conveying shaft 61 was driven to rotate when the discharge motor 6 rotates, the dust settled in the discharge box 11 was transported to the dust removal port 18 by the screw conveying shaft 61 and then discharged from the dust removal port 18.

100511 The dust removal using the second-stage dust removal device described above was performed by the following steps: 100521 The insert plate 33 was pushed by the telescopic mechanism 3 through the control panel 7, such that the insert plate 33 can close a circular hole at the connecting plate, thus closing a discharge pipe 14. An induced draft fan 13 and a dust removal motor 2 were started at the same time to make the induced draft fan 13 start working, the suction generated by the induced draft fan 13 made the air in the screen 5 enter a dust removal cavity and flow out from the induced draft fan 13, such that a negative pressure was generated at a feed pipe 12 to suck down feather raw materials into the screen 5 through the feed pipe 12, and the down feather raw materials entering the screen 5 were hit and stirred by rotating branch rods 22 for dust removal.

100531 Dust falling off the down feather raw materials entered the dust removal cavity with the flow of the air in the screen 5. The dust with larger particles settled into a discharge box 11 and was fed to a dust removal port 18 by a screw conveying shaft 61 to be discharged. The dust with smaller particles was discharged from the induced draft fan 13 with the flow of the air in the dust removal cavity. Meanwhile, in the dust removal process, an electric push rod 4 was controlled by the control panel 7 to adjust the opening size of an air inlet 16, such that the air flow rate in the dust removal cavity can be controlled, thereby controlling the air flow rate flowing from the screen 5 to the dust removal cavity. In addition, a globe valve on the collection pipe 15 was opened, the down feathers escaped in the down feather packaging process can be recovered by the collection pipe 15, and then the globe valve was closed after the recovery was completed. [0054] After dust removal, the induced draft fan 13 was turned off by the control panel 7, and meanwhile, the insert plate 33 was pulled by the telescopic mechanism 3 to make an opening 34 on the insert plate 33 coincide with a circular hole at the connecting plate 31, thus opening the discharge pipe. Then, the air inlet 16 was opened and an axial flow fan was turned on, making the axial flow fan suck away down feather raw materials in the screen 5. After the down feather raw materials in the screen 5 were discharged, the insert plate 33 is pushed by the telescopic mechanism 3 through the control panel 7 to close the circular hole at the connecting plate 31, thus closing the discharge pipe 14. Meanwhile, the air inlet 16 was closed, and the axial flow fan was turned off. The dust removal operation can be continued by repeating above operation.

[0055] Comparative example 1 [0056] Comparative example 1 was performed according to Example 4, expect that the addition amount of octadecylamine polyoxyethylene ether and sodium methyl cocoyl taurate was 0. The fourth-stage raw material has a filling power of 486, and an average softness. Then, the fourth-stage raw material was fed to a feather separator, and subjected to feather separation to obtain a down cluster. The down cluster has a filling power of 652.

[0057] Comparative example 2 [0058] Comparative example 2 was performed according to Example 4, expect that the addition amount of tridecafluorooctyltriethoxysilane was 0. The fourth-stage raw material has a filling power of 524, and a good softness. Then, the fourth-stage raw material was fed to a feather separator, and subjected to feather separation to obtain a down cluster. The down cluster has a filling power of 751.

[0059] Although the embodiments of the present disclosure have been shown and described, those skilled in the art should understand that many changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present disclosure, and the scope of the present disclosure is defined by the claims and their equivalents.

Claims

WHAT IS CLAIMED IS: 1. A method for feather separation of down feathers, comprising the following steps: Si, subjecting a down feather raw material to dust removal by using a first-stage dust removal device to obtain a first-stage raw material; S2, feeding the first-stage raw material into a washing machine, cleaning the first-stage raw material with a washing liquid at a temperature of 30-40 °C until a filtrate is clear, and then washing the first-stage raw material with water, and feeding a resulting material into a dehydrating apparatus, and performing dehydrating to obtain a second-stage raw material; S3, feeding the second-stage raw material into a dryer, and drying the second-stage raw material to obtain a third-stage raw material; and S4, feeding the third-stage raw material into a second-stage dust removal device, and performing dust removal to obtain a fourth-stage raw material; and subjecting the fourth-stage raw material to impurity removal, and then feeding a resulting material into a feather separator, and performing feather separation treatment.
2. The method for feather separation of down feathers of claim 1, wherein the impurity removal of the fourth-stage raw material is performed by attraction of a strong magnet to remove ferromagnetic impurities in the fourth-stage raw material.
3. The method for feather separation of down feathers of claim 1, wherein a mass ratio of the first-stage raw material to the washing liquid is in a range of 1: 800 to 1: 1200.
4. The method for feather separation of down feathers of claim 1 or 3, wherein the washing liquid is an aqueous solution containing 8-15 wt% of a detergent.
5. The method for feather separation of down feathers of claim 4, wherein the detergent is prepared from the following raw materials in parts by weight: 1-2 parts of octadecylamine polyoxyethylene ether, 3-4 parts of sodium methyl cocoyl taurate, 3-4 parts of sodium laurate, 2-3 parts of tridecafluorooctyltriethoxysilane, and 1-2 parts of polyethyleneglycol monooleate.
6. The method for feather separation of down feathers of claim 1, wherein the second-stage dust removal device used in step S4 comprises a box body (1), wherein a dust removal mechanism is installed in the box body (1), a control panel (7) is installed on the box body (1), a discharge box (11) is connected to a bottom of the box body (1), and an inside of the box body (1) is communicated with the discharge box (11); the dust removal mechanism comprises a screen (5), wherein the screen (5) is enclosed around, and is internally provided with a dust removal space; the screen (5) is fixedly installed in the box body (1), and a dust removal cavity is formed between the screen (5) and an inner wall of the box body (1); a dust removal motor (2) is installed on a right side of the box body (1); the dust removal motor (2) is electrically connected to the control panel (7); a supporting rod (21) is connected to a rotating shaft of the dust removal motor (2), both ends of the supporting rod (21) are rotatably installed on the box body (1), and the supporting rod (21) penetrates through the screen (5); a plurality of branch rods (22) are arranged on a surface of the supporting rod (21) in the screen (5); the branch rods (22) are free from making contact with the screen (5); a top of the box body (1) is provided with an induced draft fan (13) electrically connected to the control panel (7), and the induced draft fan (13) is communicated with the dust removal cavity; a left end of the screen (5) is provided with a discharge port, and the discharge port is connected to a discharge pipe (14) installed on the box body (1); an axial flow fan electrically connected to the control panel (7) is further installed on the discharge pipe (14); a right end of the screen (5) is provided with a feed port, and the feed port is connected to a feed pipe (12) installed on the box body (1); a lower portion of a left side face of the box body (1) is provided with an air inlet (16), and the air inlet (16) is communicated with the inside of the screen (5); a cover plate is hinged to the air inlet (16), an electric push rod (4) is hinged to a front edge of the cover plate, a bottom of the electric push rod (4) is hinged to a left side surface of the box body (1), and the electric push rod (4) is electrically connected to the control panel (7).
7. The method for feather separation of down feathers of claim 6, wherein the left end of the screen (5) is further provided with a collection port, and a connection pipe (15) is connected to the collection port; the collection pipe (15) is installed on the box body (1), and a globe valve is installed on the collection pipe (15).
8. The method for feather separation of down feathers of claim 6, wherein the discharge pipe (14) is further provided with a connecting plate (31) penetrating through the discharge pipe (14), the connecting plate (31) is provided with a circular hole communicating with the discharge pipe (14) on both sides, and an inner diameter of the circular hole is equal to that of the discharge pipe (14); the connecting plate (31) is further provided with a slide hole (32) penetrating through the connecting plate (31), and a height of the slide hole (32) is not less than the inner diameter of the circular hole; an insert plate (33) capable of closing the circular hole is installed in the slide hole (32), and a top end of the insert plate (33) is provided with a circular opening (34); and the opening (34) is able to be overlapped with the circular hole, such that when the insert plate (33) slides in the slide hole (32), the discharge pipe (14) on both sides of the circular hole is able to be opened and closed.
9. The method for feather separation of down feathers of claim 8, wherein a telescopic mechanism (3) is connected to a rear portion of the insert plate (33), and the telescopic mechanism (3) is fixedly installed on a surface of the box body (1), and electrically connected to the control panel (7).
10. The method for feather separation of down feathers of claim 6, wherein a screw conveying shaft (61) is rotatably installed in the discharge box (11), a left end of the screw conveying shaft (61) is connected to a discharge motor (6) installed on the discharge box (11), a bottom of the discharge box (11) at a right end of the screw conveying shaft (61) is provided with a dust removal port (18), and a cross section of the discharge box (11) is of an inverted conical structure, and the discharge motor (6) is electrically connected to the control panel (7).
11. Down feathers obtained by the method for feather separation of down feathers of claim 5, wherein fluorine-containing groups are formed on a surface of the down feathers.