Preparation method of fluoride-free waterproof down, waterproof down and application
By immersing and curing the down twice, the combination of paraffin, acrylic waterproofing agent and surfactant is used to solve the problem of lowering the warmth performance of down in wet environments, and the durability and environmental friendliness of fluorine-free waterproofing performance are achieved. Waterproof effect.
Patent Information
- Application Number
- CN202411249492.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2024-12-27
AI Technical Summary
Natural down has greatly reduced warming performance after being wet, and traditional waterproof chemicals are harmful to the environment and organisms, making it difficult to provide effective and long-lasting waterproofing solutions.
Using two impregnation and curing treatments, the down is impregnated and cured using the first waterproofing agent and the second waterproofing agent respectively. The waterproofing performance of the down is enhanced by the combination of paraffin, acrylic waterproofing agent and surfactant, and the waterproofing performance of the down is enhanced by the low temperature. It enhances the bonding effect with high temperature drying.
It achieves the long-lasting waterproof performance of down, avoids environmental pollution from traditional fluoride, and ensures that down maintains good waterproof and warmth for a long time.
Smart Images
Figure BDA0005031851370000111
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of down preparation, and in particular to a method for preparing fluorine-free waterproof down, waterproof down and applications. Background Art
[0002] Down is the best natural thermal insulation material due to its excellent thermal insulation performance. It is lightweight and has strong thermal insulation ability, but it is relatively afraid of water. Once soaked, its fluffiness is greatly reduced and its thermal insulation performance is relatively weakened. With the growing demand for functional down products, in order to solve the problem that down will clump and harden when it encounters wet, cold, rain and snow, and to achieve a lightweight outdoor lifestyle, it is necessary to provide a fluorine-free waterproof down and its preparation method to solve the above technical problems.
[0003] The outer layer of natural down is covered with oil, which is highly water-repellent. During the processing, the oil is removed for reasons such as cleanliness and safety. Degreased down is very sensitive to water vapor, and due to its unique structure, the down quilt is very slow to dry after water vapor intrusion, and the fluffiness is reduced, resulting in a decrease in warmth. Once the down quilt is soaked in water, it is difficult to restore the original warmth effect.
[0004] Traditionally, chemicals containing fluorinated compounds such as PFOS (perfluorooctane sulfonate) or PFOA (perfluorooctanoic acid) are often used to provide textiles with water repellency. However, these substances are considered to be persistent pollutants to the environment and may have cumulative effects on organisms. Summary of the invention
[0005] In order to solve at least one of the above technical problems, a fluorine-free waterproof down with good and long-lasting waterproof performance is developed. The present application provides a preparation method of fluorine-free waterproof down, waterproof down and application.
[0006] On the one hand, the present application provides a method for preparing fluorine-free waterproof velvet, comprising the following steps:
[0007] S1. Preprocessing
[0008] Wash and dry the down until there is no obvious impurities and grease residue on the surface;
[0009] S2, one-time impregnation
[0010] dipping the treated down in a first waterproofing agent;
[0011] S3, one-step curing
[0012] The down impregnated with the first waterproofing agent in S2 is subjected to a drying process;
[0013] S4, secondary impregnation
[0014] Dipping the dried down in a second waterproofing agent and drying after dipping;
[0015] S5. Secondary curing treatment
[0016] The down impregnated with the second waterproofing agent in S4 is subjected to a secondary drying treatment;
[0017] Wherein, the first waterproofing agent comprises the following components by weight percentage:
[0018] Paraffin: 10wt%;
[0019] Acrylic waterproofing agent: 80wt%;
[0020] Water: 5wt%;
[0021] Surfactant: 5wt%;
[0022] The second waterproofing agent comprises the following components by weight percentage:
[0023] Paraffin: 20wt%;
[0024] Acrylic waterproofing agent: 70wt%;
[0025] Water: 5wt%;
[0026] Surfactant: 5wt%.
[0027] Optionally, in S2, the immersion time is 0.5 to 1 hour.
[0028] Optionally, in S3, the drying temperature is 110-150° C. and the drying time is 0.5-1 h. Optionally, in S4, the immersion time is 1-1.5 h.
[0029] Optionally, in S5, the drying temperature is 150-180° C., and the drying time is 0.5-1 h.
[0030] Optionally, the surfactant is sodium dodecylbenzene sulfonate.
[0031] In a second aspect, the present application provides a waterproof fleece prepared by the above-mentioned fluorine-free waterproof fleece preparation method.
[0032] In a third aspect, the present application provides the application of the above-mentioned waterproof down in the field of warm down.
[0033] In summary, the present invention includes at least one of the following beneficial technical effects:
[0034] 1. The down is impregnated with the first waterproof agent and the second waterproof agent in turn. The first waterproof agent with less paraffin can bond more closely with the down, and the second waterproof agent with more wax can make the down have a better waterproof effect;
[0035] 2. Dry the down impregnated with the first waterproofing agent at low temperature through the first curing treatment to enhance the bonding effect between the first waterproofing agent and the down;
[0036] 3. The down impregnated with the second waterproofing agent is dried at high temperature through a second curing treatment to further strengthen the bonding strength between the down and the first waterproofing agent and between the first waterproofing agent and the second waterproofing agent. DETAILED DESCRIPTION
[0037] The present application is further described in detail below with reference to the embodiments.
[0038] In the following examples of the present application, unless otherwise specified, the main components involved were purchased from commercially available products.
[0039] Example 1
[0040] This embodiment is used to prepare fluorine-free waterproof fleece, comprising the following steps:
[0041] S1. Preprocessing
[0042] Wash and dry the down until there is no obvious impurities and grease residue on the surface;
[0043] S2, one-time impregnation
[0044] dipping the treated down in a first waterproofing agent;
[0045] S3, one-step curing
[0046] The down impregnated with the first waterproofing agent in S2 is subjected to a drying process;
[0047] S4, secondary impregnation
[0048] Dipping the dried down in a second waterproofing agent and drying after dipping;
[0049] S5. Secondary curing treatment
[0050] The down impregnated with the second waterproofing agent in S4 is subjected to a secondary drying treatment.
[0051] The immersion time for one immersion is exemplarily adjusted to 0.5 h.
[0052] The drying temperature in the primary curing treatment is exemplarily adjusted to 110° C. and the drying time is 0.5 h. The immersion time in the secondary immersion is exemplarily adjusted to 1 h.
[0053] The drying temperature in the secondary curing treatment is exemplarily adjusted to 150° C., and the drying time is 0.5 h.
[0054] The first waterproofing agent includes the following components by weight percentage:
[0055] Paraffin: 10wt%;
[0056] Acrylic waterproofing agent: 80wt%;
[0057] Water: 5wt%;
[0058] Surfactant: 5wt%.
[0059] The second waterproofing agent includes the following components by weight percentage:
[0060] Paraffin: 20wt%;
[0061] Acrylic waterproofing agent: 70wt%;
[0062] Water: 5wt%;
[0063] Surfactant: 5wt%.
[0064] The surfactant in the first water repellent and the second water repellent is exemplified by sodium dodecylbenzene sulfonate.
[0065] Comparative Example 1
[0066] This comparative example is used to prepare fluorine-free waterproof velvet, comprising the following steps:
[0067] S1. Preprocessing
[0068] Wash and dry the down until there is no obvious impurities and grease residue on the surface;
[0069] S2. Impregnation
[0070] The treated down is immersed in a waterproofing agent; the immersion time is exemplarily set to 1.5 hours.
[0071] S3. Curing treatment
[0072] The down impregnated with the waterproofing agent in S2 is dried; the drying process is as follows:
[0073] First adjust the drying temperature to 110℃ and the drying time to 0.5h.
[0074] Then adjust the drying temperature to 150℃ and the drying time to 0.5h.
[0075] The waterproofing agent includes the following components by weight percentage:
[0076] Paraffin: 20wt%;
[0077] Acrylic waterproofing agent: 80wt%;
[0078] Water: 5wt%;
[0079] Surfactant: 5wt%.
[0080] As the surfactant, sodium dodecylbenzenesulfonate is exemplified.
[0081] Comparative Example 2
[0082] This comparative example is used to prepare fluorine-free waterproof velvet, comprising the following steps:
[0083] S1. Preprocessing
[0084] Wash and dry the down until there is no obvious impurities and grease residue on the surface;
[0085] S2. Impregnation
[0086] The treated down is immersed in a waterproofing agent; the immersion time is exemplarily set to 1.5 hours.
[0087] S3. Curing treatment
[0088] The down impregnated with the waterproofing agent in S2 is dried; the drying process is as follows:
[0089] First adjust the drying temperature to 110℃ and the drying time to 0.5h.
[0090] Then adjust the drying temperature to 150℃ and the drying time to 0.5h.
[0091] The waterproofing agent includes the following components by weight percentage:
[0092] Paraffin: 10wt%;
[0093] Acrylic waterproofing agent: 80wt%;
[0094] Water: 5wt%;
[0095] Surfactant: 5wt%.
[0096] As the surfactant, sodium dodecylbenzenesulfonate is exemplified.
[0097] Comparative Example 3
[0098] This comparative example is used to prepare fluorine-free waterproof velvet, comprising the following steps:
[0099] S1. Preprocessing
[0100] Wash and dry the down until there is no obvious impurities and grease residue on the surface;
[0101] S2, one-time impregnation
[0102] dipping the treated down in a first waterproofing agent;
[0103] S3, one-step curing
[0104] The down impregnated with the first waterproofing agent in S2 is subjected to a drying process;
[0105] S4, secondary impregnation
[0106] Dipping the dried down in a second waterproofing agent and drying after dipping;
[0107] S5. Secondary curing treatment
[0108] The down impregnated with the second waterproofing agent in S4 is subjected to a secondary drying treatment.
[0109] The immersion time for one immersion is exemplarily adjusted to 0.5 h.
[0110] The drying temperature in the primary curing treatment is exemplarily adjusted to 110° C., and the drying time is 0.5 h.
[0111] The immersion time of the secondary immersion is exemplarily adjusted to 1 hour.
[0112] The drying temperature in the secondary curing treatment is exemplarily adjusted to 150° C., and the drying time is 0.5 h.
[0113] The first waterproofing agent includes the following components by weight percentage:
[0114] Paraffin: 10wt%;
[0115] Acrylic waterproofing agent: 80wt%;
[0116] Water: 5wt%;
[0117] Surfactant: 5wt%.
[0118] The second waterproofing agent includes the following components by weight percentage:
[0119] Paraffin: 10wt%;
[0120] Acrylic waterproofing agent: 70wt%;
[0121] Water: 5wt%;
[0122] Surfactant: 5wt%.
[0123] The surfactant in the first water repellent and the second water repellent is exemplified by sodium dodecylbenzene sulfonate.
[0124] Comparative Example 4
[0125] This comparative example is used to prepare fluorine-free waterproof velvet, comprising the following steps:
[0126] S1. Preprocessing
[0127] Wash and dry the down until there is no obvious impurities and grease residue on the surface;
[0128] S2, one-time impregnation
[0129] dipping the treated down in a first waterproofing agent;
[0130] S3, one-step curing
[0131] The down impregnated with the first waterproofing agent in S2 is subjected to a drying process;
[0132] S4, secondary impregnation
[0133] Dipping the dried down in a second waterproofing agent and drying after dipping;
[0134] S5. Secondary curing treatment
[0135] The down impregnated with the second waterproofing agent in S4 is subjected to a secondary drying treatment.
[0136] The immersion time for one immersion is exemplarily adjusted to 0.5 h.
[0137] The drying temperature in the primary curing treatment is exemplarily adjusted to 110° C. and the drying time is 0.5 h. The immersion time in the secondary immersion is exemplarily adjusted to 1 h.
[0138] The drying temperature in the secondary curing treatment is exemplarily adjusted to 150° C., and the drying time is 0.5 h.
[0139] The first waterproofing agent includes the following components by weight percentage:
[0140] Paraffin: 20wt%;
[0141] Acrylic waterproofing agent: 80wt%;
[0142] Water: 5wt%;
[0143] Surfactant: 5wt%.
[0144] The second waterproofing agent includes the following components by weight percentage:
[0145] Paraffin: 20wt%;
[0146] Acrylic waterproofing agent: 70wt%;
[0147] Water: 5wt%;
[0148] Surfactant: 5wt%.
[0149] The surfactant in the first water repellent and the second water repellent is exemplified by sodium dodecylbenzene sulfonate.
[0150] Comparative Example 5
[0151] This comparative example is used to prepare fluorine-free waterproof velvet, comprising the following steps:
[0152] S1. Preprocessing
[0153] Wash and dry the down until there is no obvious impurities and grease residue on the surface;
[0154] S2, one-time impregnation
[0155] dipping the treated down in a first waterproofing agent;
[0156] S3, one-step curing
[0157] The down impregnated with the first waterproofing agent in S2 is subjected to a drying process;
[0158] S4, secondary impregnation
[0159] Dipping the dried down in a second waterproofing agent and drying after dipping;
[0160] S5. Secondary curing treatment
[0161] The down impregnated with the second waterproofing agent in S4 is subjected to a secondary drying treatment.
[0162] The immersion time for one immersion is exemplarily adjusted to 0.5 h.
[0163] The drying temperature in the primary curing treatment is exemplarily adjusted to 110° C., and the drying time is 0.5 h.
[0164] The immersion time of the secondary immersion is exemplarily adjusted to 1 hour.
[0165] The drying temperature in the secondary curing treatment is exemplarily adjusted to 110° C., and the drying time is 0.5 h.
[0166] The first waterproofing agent includes the following components by weight percentage:
[0167] Paraffin: 10wt%;
[0168] Acrylic waterproofing agent: 80wt%;
[0169] Water: 5wt%;
[0170] Surfactant: 5wt%.
[0171] The second waterproofing agent includes the following components by weight percentage:
[0172] Paraffin: 20wt%;
[0173] Acrylic waterproofing agent: 70wt%;
[0174] Water: 5wt%;
[0175] Surfactant: 5wt%.
[0176] The surfactant in the first water repellent and the second water repellent is exemplified by sodium dodecylbenzene sulfonate.
[0177] Example 1
[0178] This embodiment is used to prepare fluorine-free waterproof fleece, comprising the following steps:
[0179] S1. Preprocessing
[0180] Wash and dry the down until there is no obvious impurities and grease residue on the surface;
[0181] S2, one-time impregnation
[0182] dipping the treated down in a first waterproofing agent;
[0183] S3, one-step curing
[0184] The down impregnated with the first waterproofing agent in S2 is subjected to a drying process;
[0185] S4, secondary impregnation
[0186] Dipping the dried down in a second waterproofing agent and drying after dipping;
[0187] S5. Secondary curing treatment
[0188] The down impregnated with the second waterproofing agent in S4 is subjected to a secondary drying treatment.
[0189] The immersion time for one immersion is exemplarily adjusted to 0.5 h.
[0190] The drying temperature in the primary curing treatment is exemplarily adjusted to 150° C., and the drying time is 0.5 h.
[0191] The immersion time of the secondary immersion is exemplarily adjusted to 1 hour.
[0192] The drying temperature in the secondary curing treatment is exemplarily adjusted to 150° C., and the drying time is 0.5 h.
[0193] The first waterproofing agent includes the following components by weight percentage:
[0194] Paraffin: 10wt%;
[0195] Acrylic waterproofing agent: 80wt%;
[0196] Water: 5wt%;
[0197] Surfactant: 5wt%.
[0198] The second waterproofing agent includes the following components by weight percentage:
[0199] Paraffin: 20wt%;
[0200] Acrylic waterproofing agent: 70wt%;
[0201] Water: 5wt%;
[0202] Surfactant: 5wt%.
[0203] The surfactant in the first water repellent and the second water repellent is exemplified by sodium dodecylbenzene sulfonate.
[0204] The waterproof down prepared in the above-mentioned embodiment and comparative examples 1 to 6 was subjected to waterproof test according to the American standard. There are three kinds of test results: all the down floats, the down is suspended, and the down sinks to the bottom. The test results after 1h, 3h and 5h are shown in Table 1.
[0205] Table 1
[0206]
[0207]
[0208] It can be seen from the embodiment, comparative example 1, comparative example 2 and Table 1 that if it is immersed only once, no matter whether it is the first waterproof agent with low wax or the second waterproof agent with high wax, the waterproof test effect is not good, especially the waterproof performance after 3 hours. After 5 hours, the waterproof performance of some down is almost completely lost and sinks to the bottom.
[0209] It can be seen from the embodiment, comparative example 3, comparative example 4 and Table 1 that if the down is impregnated twice, but both times are impregnated with the first waterproof agent with low wax or the second waterproof agent with high wax, the waterproof performance of the prepared down is poor, and in the waterproof test of 3h or more, the waterproof performance of some down is almost completely lost and sinks to the bottom.
[0210] It can be seen from the embodiment, comparative example 5, comparative example 6 and Table 1 that the primary curing treatment after the first dipping in the technical solution of the present application adopts a lower temperature, and the secondary curing treatment after the second dipping adopts a higher temperature. This allows the waterproofing agent of the first dipping to be more firmly bonded to the down, and the outer surface layer formed by the second waterproofing agent can effectively resist water washing, thereby improving the durability of the waterproof performance of the waterproof down.
[0211] In Comparative Example 5, both the primary curing treatment and the secondary curing treatment were performed at low temperatures, resulting in good waterproof performance of the waterproof down before the 3h waterproof test. However, after 3h, in the 5h waterproof test, the waterproof performance of some down was reduced, causing some of the down to float.
[0212] In Comparative Example 6, relatively high temperatures were used in both the previous and subsequent curing treatments, which would cause the waterproof layer formed by one immersion to be easily damaged, resulting in a decrease in the waterproof performance of some down and suspension in the 3h waterproof test, and a loss of waterproof performance of some down and sinking to the bottom in the 5h waterproof test.
[0213] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A method for preparing fluorine-free waterproof velvet, characterized in that: The following steps are involved: S1. Preprocessing Wash and dry the down until there is no obvious impurities and grease residue on the surface; S2, one-time impregnation dipping the treated down in a first waterproofing agent; S3, one-step curing The down impregnated with the first waterproofing agent in S2 is subjected to a drying process; S4, secondary impregnation Dipping the dried down in a second waterproofing agent and drying after dipping; S5. Secondary curing treatment The down impregnated with the second waterproofing agent in S4 is subjected to a secondary drying treatment; Wherein, the first waterproofing agent comprises the following components by weight percentage: Paraffin: 10wt%; Acrylic waterproofing agent: 80wt%; Water: 5wt%; Surfactant: 5wt%; The second waterproofing agent comprises the following components by weight percentage: Paraffin: 20wt%; Acrylic waterproofing agent: 70wt%; Water: 5wt%; Surfactant: 5wt%.
2. The method for preparing fluorine-free waterproof velvet according to claim 1, characterized in that: In the S2, the immersion time is 0.5 to 1 hour.
3. The method for preparing fluorine-free waterproof velvet according to claim 1, characterized in that: In S3, the drying temperature is 110-150° C., and the drying time is 0.5-1 h.
4. The method for preparing fluorine-free waterproof velvet according to claim 1, characterized in that: In the step S4, the immersion time is 1 to 1.5 hours.
5. The method for preparing fluorine-free waterproof velvet according to claim 1, characterized in that: In S5, the drying temperature is 150-180° C., and the drying time is 0.5-1 h.
6. The method for preparing fluorine-free waterproof velvet according to claim 1, characterized in that: The surfactant is sodium dodecylbenzene sulfonate.
7. A waterproof fleece, characterized in that: The fluorine-free waterproof fleece is prepared by the preparation method of claim 1.
8. Use of the waterproof down according to claim 7 in the field of warm down.