Light and thin down-filled lining pur bonding composite fabric and processing technology thereof

Abstract

The application relates to a light and thin down inner lining PUR bonding composite fabric and a processing technology thereof. The light and thin down inner lining PUR bonding composite fabric sequentially comprises a lower fabric, a glue bonding down layer and an upper fabric. The glue bonding down layer is bonded by using PUR glue. The PUR glue comprises the following components in mass fraction: modified polyether polycarbonate polyol 30-40 parts, amino-terminated crosslinking agent 10-20 parts, fluorinated modified isocyanate 20-30 parts, water-resistant modified chain extender 5-8 parts and catalyst 0.1-0.2 parts. The processing technology adopts the following steps: preparing the PUR glue, uniformly laying the down pieces on the lower fabric, applying glue to the lower fabric after laying the down pieces, obtaining the glue bonding down layer, hot-pressing and adhering the upper fabric to the glue bonding down layer, and obtaining the light and thin down inner lining PUR bonding composite fabric. The PUR glue has good adhesive performance and water washing resistance. The bonded composite fabric has good moisture permeability, and can maintain good bonding effect after multiple water washing.

Description

Technical Field

[0001] This application relates to the field of composite fabrics, and in particular to a lightweight down-lined PUR bonded composite fabric and its processing technology. Background Technology

[0002] Down jackets are garments made by sewing animal feathers into clothing for warmth in winter, and they are widely loved for their excellent warmth retention. However, because down is fluffy, down jackets are relatively bulky and can make the wearer appear cumbersome. Furthermore, in the milder temperatures of central and southern regions, the warmth provided by down jackets often exceeds actual needs. Therefore, manufacturers have made down jackets lighter and thinner so that they can be worn as inner linings. Conventional down products, after prolonged use, may experience issues such as down feathers escaping from the garment or clumping after washing. Over time, the amount of down inside the garment decreases or becomes less fluffy.

[0003] The lightweight down-lined composite fabric uses adhesive to bond down fragments between two layers of fabric through hot pressing, effectively reducing down leakage and ensuring even distribution of down within the fabric. PUR adhesive is a one-component, moisture-curing polyurethane hot melt adhesive, possessing the initial bonding speed of hot melt adhesives and the bonding strength of structural adhesives. After cooling, it continues to cure for several hours to several days under ambient humidity conditions, continuously increasing its strength. However, the fabric undergoes several washes and cleanings, making the composite fabric prone to interlayer delamination, affecting its lifespan; therefore, improvements are needed. Summary of the Invention

[0004] To improve the water resistance of PUR adhesive, this application provides a lightweight down-lined PUR bonded composite fabric and its processing technology.

[0005] The technical solution for the lightweight down-lined PUR bonded composite fabric and its processing technology provided in this application is as follows:

[0006] In a first aspect, this application provides a lightweight down-lined PUR-bonded composite fabric, which adopts the following technical solution: a lightweight down-lined PUR-bonded composite fabric, wherein the lightweight down-lined PUR-bonded composite fabric comprises, in sequence, a lower fabric, an adhesive-bonded down layer, and an upper fabric, wherein the adhesive-bonded down layer is bonded using PUR adhesive, and the PUR adhesive comprises the following components in parts by weight:

[0007] 30-40 parts of modified polyether polycarbonate polyol

[0008] 10-20 parts of amino-terminated crosslinking agent

[0009] 20-30 parts of fluorinated modified isocyanate

[0010] 5-8 parts of water-resistant modified chain extender

[0011] Catalyst 0.1-0.2 parts.

[0012] Modified polyether polycarbonate polyols, through modification treatment, exhibit excellent adhesion and water-wash resistance. Amino-terminated crosslinking agents possess good reactivity, forming a crosslinked network through crosslinking polymerization with the PUR adhesive molecular backbone, thereby enhancing the stability of the polymer molecules and thus improving its water-wash resistance. Fluorinated isocyanates introduce fluorine, which improves the stability and hydrophobicity of PUR adhesives, thus enhancing their water-wash resistance. Water-resistant chain extenders synergistically work with amino-terminated crosslinking agents to further strengthen the crosslinked structure of the PUR adhesive molecular backbone, improving its stability and water-wash resistance.

[0013] Preferably, the raw materials for preparing the modified polyether polycarbonate polyol include carbon dioxide, maleic anhydride, and propylene oxide.

[0014] Preferably, the raw materials for preparing the maleic anhydride include maleic anhydride and rosin.

[0015] Gum rosin has abundant active groups. Maleic anhydride, obtained by reacting with maleic anhydride, has good reactivity and adhesion properties. Introducing maleic anhydride as a functional monomer into the synthesis of polyether polycarbonate can effectively improve the adhesion and reactivity of modified polyether polycarbonate polyol, reduce the adsorption of water by PUR adhesive, improve hydrophobicity, thereby reducing the performance degradation caused by water erosion and improving its stability and water washability.

[0016] Preferably, the raw materials for preparing the terminal amino crosslinking agent include 1,3-propanediamine and methylguanidine.

[0017] The terminal amino crosslinking agent generated by the reaction of methylguanidine and 1,3-propylenediamine has high reactivity and active amino groups at both ends of the molecule. It can be effectively grafted onto the molecular backbone of PUR adhesive to form an ordered and controllable branched structure. This improves the wash resistance of the composite fabric while allowing the adhesive to bond the down layer to retain a good pore structure. As a result, the composite fabric can maintain good wash resistance and good moisture permeability, thus improving the comfort of wearing the fabric.

[0018] Preferably, the raw materials for preparing the fluorinated modified isocyanate include isocyanate and fluorinated grafting agent.

[0019] Preferably, the fluorinated grafting agent comprises 3-(aminomethyl)-5-fluorophenol.

[0020] 3-(aminomethyl)-5-fluorophenol introduces a benzene ring structure and fluorine atoms into the isocyanate molecule, improving the hydrophobicity and stability of the isocyanate, reducing its surface energy, and thus improving its washability. 3-(aminomethyl)-5-fluorophenol introduces more active groups into the isocyanate molecule, which can form various chemical bonds such as hydrogen bonds between the layers of the composite fabric, thereby giving the composite fabric a strong bonding force and enhancing its adhesion.

[0021] Preferably, the mass ratio of the isocyanate to the fluorinated grafting agent is 1:(0.6-0.8).

[0022] The fluorinated modified isocyanate prepared according to the above mass ratio can improve the bonding performance and water resistance of PUR adhesive.

[0023] Preferably, the water-resistant modified chain extender comprises tannic acid and 1,10-diaminodecane.

[0024] Tannic acid molecules possess abundant catechol structures, which can enhance the adhesion properties of adhesives. A water-resistant modified chain extender obtained by reacting tannic acid with 1,10-diaminodecane can successfully introduce tannic acid into the side chains of PUR adhesive molecules, reducing the influence of steric hindrance on the reaction and transforming simple blending into graft copolymerization. The phenolic hydroxyl groups of tannic acid molecules can also react with fluorinated modified isocyanates, thus the water-resistant modified chain extender and the terminal amino crosslinking agent work synergistically to construct a stable polymer network. The structure of tannic acid can also effectively control the occurrence of chain extension reactions, thereby regulating the pore structure and enabling the composite fabric to maintain good moisture permeability.

[0025] Preferably, the mass ratio of the tannic acid to 1,10-diaminodecane is 1:(0.2-0.3).

[0026] The water-resistant modified chain extender prepared according to the above mass ratio has good reactivity, which can improve the adhesion of the adhesive and enhance the water resistance and moisture permeability of the composite fabric.

[0027] Secondly, this application provides a processing technology for a lightweight down-lined PUR bonded composite fabric, employing the following technical solution:

[0028] A processing technology for PUR bonded composite fabrics used in lightweight down linings comprises the following steps:

[0029] Modified polyether polycarbonate polyol, fluorinated modified isocyanate, water-resistant modified chain extender and catalyst are mixed and dispersed to obtain a prepolymer mixture. The prepolymer mixture is heated to react. A terminal amino crosslinking agent is added to the reacted prepolymer mixture, and the reaction is continued. After cooling, PUR adhesive is obtained. Down fragments are evenly laid on the lower fabric. Adhesive is applied to the lower fabric after the down is laid to obtain an adhesive-bonded down layer. The upper fabric is hot-pressed to the adhesive-bonded down layer to obtain a lightweight down-lined PUR adhesive composite fabric.

[0030] The composite fabric prepared according to the above steps has good water resistance, stability and moisture permeability.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. Modified polyether polycarbonate polyols, through modification treatment, exhibit excellent adhesion and water-wash resistance; terminal amino crosslinking agents possess good reactivity, forming a crosslinked network through crosslinking polymerization with the PUR adhesive molecular backbone, thereby enhancing the stability of the polymer molecules and thus improving its water-wash resistance; fluorinated modified isocyanates introduce fluorine, which can improve the stability and hydrophobicity of PUR adhesives, thereby enhancing their water-wash resistance; water-resistant modified chain extenders can synergistically work with terminal amino crosslinking agents to further strengthen the crosslinked structure of the PUR adhesive molecular backbone, improving its stability and water-wash resistance.

[0033] 2. The terminal amino crosslinking agent generated by the reaction of methylguanidine and 1,3-propylenediamine has high reactivity. With active amino groups at both ends of the molecule, it can be effectively grafted onto the molecular backbone of PUR adhesive to form an ordered and controllable branched structure. This improves the wash resistance of the composite fabric while ensuring that the adhesive-bonded down layer retains a good porous structure. As a result, the composite fabric has good wash resistance and good moisture permeability, thus improving the comfort of wearing the fabric.

[0034] 3. Tannic acid molecules possess abundant catechol structures, which can enhance the adhesion properties of adhesives. A water-resistant modified chain extender obtained by reacting tannic acid with 1,10-diaminodecane can successfully introduce tannic acid into the side chains of PUR adhesive molecules, reducing the influence of steric hindrance on the reaction and transforming simple blending into graft copolymerization. The phenolic hydroxyl groups of tannic acid molecules can also react with fluorinated modified isocyanates, thus the water-resistant modified chain extender and the terminal amino crosslinking agent work synergistically to construct a stable polymer network. The structure of tannic acid can also effectively control the occurrence of chain extension reactions, thereby regulating the pore structure and enabling the composite fabric to maintain good moisture permeability. Attached Figure Description

[0035] Figure 1This is a cross-sectional view of a lightweight down-lined PUR bonded composite fabric in an embodiment of this application.

[0036] Explanation of reference numerals in the attached diagram: 1. Upper fabric; 2. Down layer bonded with adhesive; 3. Lower fabric. Detailed Implementation

[0037] This application discloses a lightweight down-lined PUR bonded composite fabric and its processing technology. Unless otherwise specified, all raw materials used in this application are commercially available. The following detailed description, in conjunction with embodiments, further illustrates this application: Raw material description: rosin (CAS No.: 8050-09-7), maleic anhydride (CAS No.: 108-31-6), dibutyltin dilaurate (CAS No.: 77-58-7), turpentine (CAS No.: 8006-64-2), propylene oxide (CAS No.: 75-56-9), bis(triphenylphosphine)ammonium chloride (CAS No.: 21050-13-5), triethylboron (CAS No.: 97-94-9), 1,3-propanediamine (CAS No.: 1... 09-76-2), methylguanidine (CAS No.: 542-02-9), isocyanate is isophorone diisocyanate (CAS No.: 4098-71-9), fluorinated grafting agent is 3-(aminomethyl)-5-fluorophenol (CAS No.: 1243285-06-4), tannic acid (CAS No.: 1401-55-4), 1,10-diaminodecane (CAS No.: 646-25-3), catalyst is dibutyltin dilaurate, fluorinated polyol is pentafluoro-1-propanol (CAS No.: 422-05-9), ethylenediamine (CAS No.: 107-15-3), polyether polyol (CAS No.: 9003-11-6), aziridine (CAS No.: 151-56-4).

[0038] Example 1

[0039] Preparation of modified polyether polycarbonate polyols

[0040] 15.1 kg of rosin, 2.88 kg of maleic anhydride, and 0.3 kg of dibutyltin dilaurate were mixed and dispersed. Ammonia gas was introduced for 15 min, and the mixture was heated until it melted. Then, the mixture was stirred at 200 rpm and heated to 180 °C. After reacting at 180 °C for 4 h, the mixture was cooled to 110 °C and the product was poured into turpentine oil. The mixture was crystallized at room temperature. The crystals were washed three times with ethanol by vacuum filtration. The washed crystals were dried in a vacuum oven at 60 °C to obtain maleic anhydride.

[0041] 4.5 kg of maleic anhydride and 45 kg of propylene oxide were mixed and dispersed in a dry environment. 15 g of bis(triphenylphosphine)ammonium chloride and 36 g of triethylboron were added to obtain a mixed reaction system. The mixed reaction system was heated to 70 °C and reacted for 2.5 h. The mixed reaction system was then cooled in water at 20 °C for 5 min. 3 g of triethylboron was added to the mixed reaction system, and carbon dioxide was introduced to maintain the pressure at 4 MPa. The mixed reaction system was reacted at 50 °C for 7 h, cooled in an ice-water bath, and the reaction was quenched by adding 1 mol / L hydrochloric acid to obtain a crude product. The crude product was dissolved in dichloromethane and precipitated in ethanol. The precipitate was dried in a vacuum oven at 80 °C to obtain modified polyether polycarbonate polyol, which was stored in a dry environment for later use.

[0042] Preparation of amino-terminated crosslinking agents

[0043] 11.25 kg of 1,3-propanediamine and 18.75 kg of methylguanidine were mixed and dispersed in 50 L of acetone. 1 kg of ammonium chloride was added to obtain a crosslinking agent reaction solution. The crosslinking agent reaction solution was heated to 80 °C and reacted for 2 h. After rotary evaporation, it was washed with deionized water and dried in an oven at 60 °C to obtain an amino-terminated crosslinking agent.

[0044] Preparation of fluorinated modified isocyanates

[0045] 31.25 kg of isocyanate was dispersed in 50 L of ethyl acetate to obtain an isocyanate solution. 18.75 kg of fluorinated grafting agent was dispersed in 30 L of ethyl acetate to obtain a grafting agent solution. Using 0.1 kg of dibutyltin dilaurate as a catalyst, the grafting agent solution was added to the isocyanate solution within 30 min. The reaction was carried out under a nitrogen atmosphere and at 40 °C for 2 h with a stirring speed of 200 rpm. After vacuum distillation and cooling to below 30 °C, fluorinated modified isocyanate was obtained.

[0046] Preparation of hydrophobic modified chain extenders

[0047] 8.33 kg of tannic acid and 20 L of 0.01 mol / L hydrochloric acid were mixed and stirred to obtain a tannic acid solution. 1.67 kg of 1,10-diaminodecane was mixed and dispersed in ethanol to obtain an ammonia solution. The ammonia solution was added to the tannic acid solution, and the mixture was stirred at 200 rpm in an 80 °C water bath for 4 h. After rotary evaporation, the mixture was dried in an oven at 60 °C to obtain a hydrophobic modified chain extender.

[0048] Preparation of lightweight down-lined PUR bonded composite fabric

[0049] 30 kg of modified polyether polycarbonate polyol, 20 kg of fluorinated modified isocyanate, 5 kg of water-resistant modified chain extender, and 0.1 kg of catalyst were mixed and dispersed to obtain a prepolymer mixture. The prepolymer mixture was heated to 80°C and reacted for 6 hours. 10 kg of terminal amino crosslinking agent was added to the reacted prepolymer mixture, and the reaction was continued at 80°C for 2 hours. After cooling to 30°C, PUR adhesive was obtained. Down fragments were evenly laid on the lower fabric layer, and adhesive was applied to the lower fabric layer after the down was laid to obtain an adhesive-bonded down layer. The upper fabric layer was bonded to the adhesive-bonded down layer and hot-pressed at 90°C. After being placed under 50% humidity for 3 days, a lightweight down-lined PUR bonded composite fabric was obtained.

[0050] Example 2

[0051] Preparation of modified polyether polycarbonate polyols

[0052] 15.1 kg of rosin, 2.88 kg of maleic anhydride, and 0.3 kg of dibutyltin dilaurate were mixed and dispersed. Ammonia gas was introduced for 15 min, and the mixture was heated until it melted. Then, the mixture was stirred at 200 rpm and heated to 180 °C. After reacting at 180 °C for 4 h, the mixture was cooled to 110 °C and the product was poured into turpentine oil. The mixture was crystallized at room temperature. The crystals were washed three times with ethanol by vacuum filtration. The washed crystals were dried in a vacuum oven at 60 °C to obtain maleic anhydride.

[0053] 4.5 kg of maleic anhydride and 45 kg of propylene oxide were mixed and dispersed in a dry environment. 15 g of bis(triphenylphosphine)ammonium chloride and 36 g of triethylboron were added to obtain a mixed reaction system. The mixed reaction system was heated to 70 °C and reacted for 2.5 h. The mixed reaction system was then cooled in water at 20 °C for 5 min. 3 g of triethylboron was added to the mixed reaction system, and carbon dioxide was introduced to maintain the pressure at 4 MPa. The mixed reaction system was reacted at 50 °C for 7 h, cooled in an ice-water bath, and the reaction was quenched by adding 1 mol / L hydrochloric acid to obtain a crude product. The crude product was dissolved in dichloromethane and precipitated in ethanol. The precipitate was dried in a vacuum oven at 80 °C to obtain modified polyether polycarbonate polyol, which was stored in a dry environment for later use.

[0054] Preparation of amino-terminated crosslinking agents

[0055] 11.25 kg of 1,3-propanediamine and 18.75 kg of methylguanidine were mixed and dispersed in 50 L of acetone. 1 kg of ammonium chloride was added to obtain a crosslinking agent reaction solution. The crosslinking agent reaction solution was heated to 80 °C and reacted for 2 h. After rotary evaporation, it was washed with deionized water and dried in an oven at 60 °C to obtain an amino-terminated crosslinking agent.

[0056] Preparation of fluorinated modified isocyanates

[0057] 27.78 kg of isocyanate was dispersed in 50 L of ethyl acetate to obtain an isocyanate solution. 22.22 kg of fluorinated grafting agent was dispersed in 30 L of ethyl acetate to obtain a grafting agent solution. Using 0.1 kg of dibutyltin dilaurate as a catalyst, the grafting agent solution was added to the isocyanate solution within 30 min. The reaction was carried out under a nitrogen atmosphere and at 40 °C for 2 h with a stirring speed of 200 rpm. After vacuum distillation, the mixture was cooled to below 30 °C to obtain fluorinated modified isocyanate.

[0058] Preparation of hydrophobic modified chain extenders

[0059] 7.69 kg of tannic acid and 20 L of 0.01 mol / L hydrochloric acid were mixed and stirred to obtain a tannic acid solution. 2.31 kg of 1,10-diaminodecane was mixed and dispersed in ethanol to obtain an ammonia solution. The ammonia solution was added to the tannic acid solution, and the mixture was stirred at 200 rpm in an 80 °C water bath for 4 h. After rotary evaporation, the mixture was dried in an oven at 60 °C to obtain a hydrophobic modified chain extender.

[0060] Preparation of lightweight down-lined PUR bonded composite fabric

[0061] 40 kg of modified polyether polycarbonate polyol, 30 kg of fluorinated modified isocyanate, 8 kg of water-resistant modified chain extender, and 0.2 kg of catalyst were mixed and dispersed to obtain a prepolymer mixture. The prepolymer mixture was heated to 80°C and reacted for 6 hours. 20 kg of terminal amino crosslinking agent was added to the reacted prepolymer mixture, and the reaction was continued at 80°C for 2 hours. After cooling to 30°C, PUR adhesive was obtained. Down fragments were evenly laid on the lower fabric layer, and adhesive was applied to the lower fabric layer after the down was laid to obtain an adhesive-bonded down layer. The upper fabric layer was bonded to the adhesive-bonded down layer and hot-pressed at 90°C. After being placed under 50% humidity for 3 days, a lightweight down-lined PUR bonded composite fabric was obtained.

[0062] Example 3

[0063] Preparation of modified polyether polycarbonate polyols

[0064] 15.1 kg of rosin, 2.88 kg of maleic anhydride, and 0.3 kg of dibutyltin dilaurate were mixed and dispersed. Ammonia gas was introduced for 15 min, and the mixture was heated until it melted. Then, the mixture was stirred at 200 rpm and heated to 180 °C. After reacting at 180 °C for 4 h, the mixture was cooled to 110 °C and the product was poured into turpentine oil. The mixture was crystallized at room temperature. The crystals were washed three times with ethanol by vacuum filtration. The washed crystals were dried in a vacuum oven at 60 °C to obtain maleic anhydride.

[0065] 4.5 kg of maleic anhydride and 45 kg of propylene oxide were mixed and dispersed in a dry environment. 15 g of bis(triphenylphosphine)ammonium chloride and 36 g of triethylboron were added to obtain a mixed reaction system. The mixed reaction system was heated to 70 °C and reacted for 2.5 h. The mixed reaction system was then cooled in water at 20 °C for 5 min. 3 g of triethylboron was added to the mixed reaction system, and carbon dioxide was introduced to maintain the pressure at 4 MPa. The mixed reaction system was reacted at 50 °C for 7 h, cooled in an ice-water bath, and the reaction was quenched by adding 1 mol / L hydrochloric acid to obtain a crude product. The crude product was dissolved in dichloromethane and precipitated in ethanol. The precipitate was dried in a vacuum oven at 80 °C to obtain modified polyether polycarbonate polyol, which was stored in a dry environment for later use.

[0066] Preparation of amino-terminated crosslinking agents

[0067] 11.25 kg of 1,3-propanediamine and 18.75 kg of methylguanidine were mixed and dispersed in 50 L of acetone. 1 kg of ammonium chloride was added to obtain a crosslinking agent reaction solution. The crosslinking agent reaction solution was heated to 80 °C and reacted for 2 h. After rotary evaporation, it was washed with deionized water and dried in an oven at 60 °C to obtain an amino-terminated crosslinking agent.

[0068] Preparation of fluorinated modified isocyanates

[0069] 29.41 kg of isocyanate was dispersed in 50 L of ethyl acetate to obtain an isocyanate solution. 20.59 kg of fluorinated grafting agent was dispersed in 30 L of ethyl acetate to obtain a grafting agent solution. Using 0.1 kg of dibutyltin dilaurate as a catalyst, the grafting agent solution was added to the isocyanate solution within 30 min. The reaction was carried out under a nitrogen atmosphere and at 40 °C for 2 h with stirring speed of 200 rpm. After vacuum distillation, the mixture was cooled to below 30 °C to obtain fluorinated modified isocyanate.

[0070] Preparation of hydrophobic modified chain extenders

[0071] 8 kg of tannic acid and 20 L of 0.01 mol / L hydrochloric acid were mixed and stirred to obtain a tannic acid solution. 2 kg of 1,10-diaminodecane was mixed and dispersed in ethanol to obtain an ammonia solution. The ammonia solution was added to the tannic acid solution, and the mixture was stirred at 200 rpm in an 80 °C water bath for 4 h. After rotary evaporation, the mixture was dried in an oven at 60 °C to obtain a hydrophobic modified chain extender.

[0072] Preparation of lightweight down-lined PUR bonded composite fabric

[0073] 35 kg of modified polyether polycarbonate polyol, 25 kg of fluorinated modified isocyanate, 6.5 kg of water-resistant modified chain extender, and 0.15 kg of catalyst were mixed and dispersed to obtain a prepolymer mixture. The prepolymer mixture was heated to 80°C and reacted for 6 hours. 15 kg of terminal amino crosslinking agent was added to the reacted prepolymer mixture, and the reaction was continued at 80°C for 2 hours. After cooling to 30°C, PUR adhesive was obtained. Down fragments were evenly laid on the lower fabric layer, and adhesive was applied to the lower fabric layer after laying down to obtain an adhesive-bonded down layer. The upper fabric layer was then bonded to the adhesive-bonded down layer and hot-pressed at 90°C. After being placed under 50% humidity for 3 days, a lightweight down-lined PUR bonded composite fabric was obtained.

[0074] Example 4

[0075] Example 4 is based on Example 3. The only difference between Example 4 and Example 3 is that maleic anhydride was replaced with maleic anhydride when preparing the modified polyether polycarbonate polyol in Example 4.

[0076] Example 5

[0077] Example 5 is based on Example 3. The only difference between Example 5 and Example 3 is that in Example 5, the fluorinated grafting agent is replaced with a fluorinated polyol when preparing the fluorinated modified isocyanate.

[0078] Example 6

[0079] Example 6 is based on Example 3. The only difference between Example 6 and Example 3 is that the amount of isocyanate used in Example 6 is 33.33 kg and the amount of fluorinated grafting agent used is 16.67 kg.

[0080] Example 7

[0081] Example 7 is based on Example 3. The only difference between Example 7 and Example 3 is that the amount of isocyanate used in Example 7 is 26.32 kg and the amount of fluorinated grafting agent used is 23.68 kg.

[0082] Example 8

[0083] Example 8 is based on Example 3. The only difference between Example 8 and Example 3 is that 1,10-diaminosilane is replaced with ethylenediamine when preparing the water-resistant modified chain extender in Example 8.

[0084] Example 9

[0085] Example 9 is based on Example 3. The only difference between Example 9 and Example 3 is that the amount of tannic acid used in Example 9 is 8.7 kg and the amount of 1,10-diaminodecane used is 1.3 kg.

[0086] Example 10

[0087] Example 10 is based on Example 3. The only difference between Example 10 and Example 3 is that the amount of tannic acid used in Example 10 is 7.41 kg and the amount of 1,10-diaminodecane used is 2.59 kg.

[0088] Comparative Example 1

[0089] Comparative Example 1 is based on Example 3. The only difference between Comparative Example 1 and Example 3 is that the modified polyether polycarbonate polyol is replaced with polyether polyol in Comparative Example 1.

[0090] Comparative Example 2

[0091] Comparative Example 2 is based on Example 3. The only difference between Comparative Example 2 and Example 3 is that the terminal amino crosslinking agent in Comparative Example 2 is replaced with aziridine.

[0092] Comparative Example 3

[0093] Comparative Example 3 is based on Example 3. The only difference between Comparative Example 3 and Example 3 is that the fluorinated modified isocyanate is replaced with isophorone diisocyanate in Comparative Example 3.

[0094] Comparative Example 4

[0095] Comparative Example 4 is based on Example 3. The only difference between Comparative Example 4 and Example 3 is that the water-resistant modified chain extender is replaced with tannic acid in Comparative Example 4.

[0096] Comparative Example 5

[0097] Comparative Example 5 is based on Example 3. The only difference between Comparative Example 5 and Example 3 is that the water-resistant modified chain extender in Comparative Example 5 is replaced with 1,10-diaminodecane.

[0098] Performance testing

[0099] (1) The standard GB / T2792-2014 Test Method for Peel Strength of Adhesive Tape was selected. The peel strength of the composite fabric was tested using a benchtop tensile testing machine. The peel strength was tested before washing and after 30 washes. Three samples were prepared for each sample. The average value was taken after measurement and the results were recorded in Table 1.

[0100] (2) Select GB / T12704.2-2009 Textiles - Test Method for Moisture Permeability of Fabrics - Part 2: Evaporation Method as the standard. Cut three samples with a diameter of 70 cm from the composite fabric. Under the conditions of 38℃ temperature and 50% humidity, calculate the moisture permeability of the samples using the inverted cup method. After measurement, take the average value of the three samples and fill in the measurement results in Table 1.

[0101] Table 1. Test results of bonding performance, washability, and moisture permeability of composite fabrics.

[0102]

[0103] As shown in Table 1, the peel strength of Examples 1-3 before washing was greater than 24.7 N / 25 mm, the peel strength after washing was greater than 22.3 N / 25 mm, and the moisture permeability was greater than 8314 g / (m³). 2 •24h), thus it can be seen that the composite fabric prepared in this application has good adhesion, water resistance and moisture permeability.

[0104] As shown in Table 1, the only difference between Example 4 and Example 3 is that in Example 4, maleic anhydride was replaced with maleic anhydride when preparing the modified polyether polycarbonate polyol. Compared with Example 3, the adhesion, washability, and moisture permeability of Example 4 all decreased. This is because replacing maleic anhydride with maleic anhydride lacks the modification treatment of rosin, reduces the active groups of maleic anhydride, decreases reactivity and adhesion, and reduces hydrophobicity, thus weakening the ability to resist water erosion. As a result, the adhesion, washability, and moisture permeability of the composite fabric all decreased.

[0105] As shown in Table 1, the only difference between Example 5 and Example 3 is that in Example 5, the fluorinated grafting agent was replaced with a fluorinated polyol when preparing the fluorinated modified isocyanate. Compared with Example 3, the adhesion and washability of Example 5 both decreased. This is because replacing the grafting agent with a fluorinated polyol reduces the number of active groups in the fluorinated polyol, weakens its ability to form chemical bonds, and thus reduces the interlayer bonding of the composite fabric. In addition, the lack of benzene ring structure also reduces stability and hydrophobicity, resulting in a decrease in both adhesion and washability.

[0106] As shown in Table 1, the only difference between Examples 6 and 7 and Example 3 is that the mass ratio of isocyanate to fluorinated grafting agent in Example 6 is 1:0.5, and the mass ratio of isocyanate to fluorinated grafting agent in Example 7 is 1:0.9. Compared with Example 3, the adhesion and water-washing resistance of Examples 6 and 7 are reduced. This is because the mass ratio of isocyanate to fluorinated grafting agent is not within the specified range. Too much or too little fluorinated grafting agent will affect the reaction performance and overall chemical bonding of the fluorinated modified isocyanate, thus reducing the adhesion and water-washing resistance.

[0107] As shown in Table 1, the only difference between Example 8 and Example 3 is that 1,10-diaminosilane was replaced with ethylenediamine when preparing the water-resistant modified chain extender in Example 8. Compared with Example 3, the adhesion, washability, and moisture permeability of Example 8 all decreased. This is because replacing 1,10-diaminosilane with ethylenediamine results in a shorter chain structure and greater steric hindrance between tannic acid molecules. This reduces the reactivity of the chain extender obtained by reacting with ethylenediamine, thereby affecting the crosslinking performance of the water-resistant modified chain extender. The synergistic effect between the water-resistant modified chain extender and the terminal amino crosslinker is weakened, resulting in a decrease in adhesion, washability, and moisture permeability.

[0108] As shown in Table 1, the only difference between Examples 9 and 10 and Example 3 is that the mass ratio of tannic acid to 1,10-diaminodecane in Example 9 is 1:0.15, and the mass ratio of tannic acid to 1,10-diaminodecane in Example 10 is 1:0.35. Compared with Example 3, the adhesion, washability, and moisture permeability of Examples 9 and 10 are all reduced. This is because the mass ratio of tannic acid to 1,10-diaminosilane is not within the specified range. Too much or too little 1,10-diaminodecane will affect the reaction performance and structure of the modified water-resistant chain extender, thereby affecting the morphology and stability of the polymer network, resulting in a decrease in adhesion, washability, and moisture permeability.

[0109] As shown in Table 1, the only difference between Comparative Example 1 and Example 3 is that the modified polyether polycarbonate polyol in Comparative Example 1 was replaced with polyether polyol. Compared with Example 3, the adhesion performance, water washability, and moisture permeability of Comparative Example 1 were significantly reduced. This is because the polyether polyol lacks the polycarbonate structure and the introduction of maleic pine anhydride, resulting in a decrease in adhesion and hydrophobicity, reduced reactivity, and weakened resistance to water erosion. As a result, the adhesion performance, water washability, and moisture permeability were all significantly reduced.

[0110] As shown in Table 1, the only difference between Comparative Example 2 and Example 3 is that the terminal amino crosslinking agent in Comparative Example 2 was replaced with aziridine. Compared with Example 3, the adhesion performance, water resistance, and moisture permeability of Comparative Example 2 all decreased significantly. This is because replacing the terminal amino crosslinking agent with aziridine results in weaker reactivity of aziridine, a reduced effect on pore structure regulation, and decreased stability of the PUR adhesive, thus leading to a significant decrease in adhesion performance, water resistance, and moisture permeability.

[0111] As shown in Table 1, the only difference between Comparative Example 3 and Example 3 is that the fluorinated modified isocyanate in Comparative Example 3 was replaced with isophorone diisocyanate. Compared with Example 3, the adhesion performance, water resistance, and moisture permeability of Comparative Example 3 were significantly reduced. This is because the lack of modification treatment with 3-(aminomethyl)-5-fluorophenol increased the surface energy of the adhesive molecules, reduced the hydrophobicity, weakened the stability, and reduced the chemical bonding due to the lack of introduction of active groups, thus resulting in a significant decrease in adhesion performance, water resistance, and moisture permeability.

[0112] As shown in Table 1, the only difference between Comparative Examples 4 and 5 and Example 3 is that the water-resistant modified chain extender in Comparative Example 4 was replaced with tannic acid, and the water-resistant modified chain extender in Comparative Example 5 was replaced with 1,10-diaminodecane. Compared with Example 3, the adhesion, washability, and moisture permeability of Comparative Examples 4 and 5 were significantly reduced. This is because replacing the water-resistant modified chain extender with tannic acid or 1,10-diaminodecane resulted in a decrease in the reactivity of tannic acid due to the lack of diamine modification, and a decrease in the adhesion of 1,10-diaminodecane due to the lack of catechol structure. The control over the chain extension reaction was weakened, and the pore structure was reduced, thus resulting in a significant decrease in the adhesion, washability, and moisture permeability.

[0113] This specific embodiment is merely an explanation of this application and is not intended to limit it. Based on the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this application. The technical scope of this application is not limited to the contents of the specification but must be determined according to the scope of the claims.

Claims

1. A lightweight down-lined PUR bonded composite fabric, characterized in that: The lightweight down lining PUR bonded composite fabric comprises, in sequence, a lower fabric, an adhesive-bonded down layer, and an upper fabric. The adhesive-bonded down layer is bonded using PUR adhesive, which comprises the following components in parts by weight: 30-40 parts of modified polyether polycarbonate polyol 10-20 parts of amino-terminated crosslinking agent 20-30 parts of fluorinated modified isocyanate 5-8 parts of water-resistant modified chain extender Catalyst 0.1-0.2 parts; The raw materials for preparing the modified polyether polycarbonate polyol include carbon dioxide, maleic anhydride, and propylene oxide. The raw materials for preparing maleic anhydride include maleic anhydride and rosin. The raw materials for preparing the terminal amino crosslinking agent include 1,3-propanediamine and methylguanidine; The raw materials for preparing the fluorinated modified isocyanate include isocyanate and fluorinated grafting agent. The fluorinated grafting agent includes 3-(aminomethyl)-5-fluorophenol; The water-resistant modified chain extender includes tannic acid and 1,10-diaminodecane.

2. The lightweight down-lined PUR bonded composite fabric according to claim 1, characterized in that: The mass ratio of the isocyanate to the fluorinated grafting agent is 1:(0.6-0.8).

3. The lightweight down-lined PUR bonded composite fabric according to claim 1, characterized in that: The mass ratio of the tannic acid to 1,10-diaminodecane is 1:(0.2-0.3).

4. A processing method for the lightweight down lining PUR bonded composite fabric as described in claim 1, characterized in that: The following steps are used: Modified polyether polycarbonate polyol, fluorinated modified isocyanate, water-resistant modified chain extender and catalyst are mixed and dispersed to obtain a prepolymer mixture. The prepolymer mixture is heated to react. A terminal amino crosslinking agent is added to the reacted prepolymer mixture, and the reaction is continued. After cooling, PUR adhesive is obtained. Down fragments are evenly laid on the lower fabric. Adhesive is applied to the lower fabric after the down is laid to obtain an adhesive-bonded down layer. The upper fabric is hot-pressed to the adhesive-bonded down layer to obtain a lightweight down-lined PUR adhesive composite fabric.

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