A warm, waterproof and moisture-permeable functional composite fabric

Abstract

The application discloses a warm-keeping, waterproof and moisture-permeable functional composite fabric, which comprises an outer fabric, an inner fabric, a functional film, a waterproof layer applied on the surface of the outer fabric, and a bonding layer for bonding the outer fabric, the inner fabric and the functional film; the waterproof layer is made of a mixture of organic silicon modified acrylate emulsion and silica sol. When the fabric is prepared, a waterproof finishing liquid is prepared according to a process prescription; the outer fabric is immersed in the waterproof finishing liquid, and is subjected to liquid padding, pre-drying and baking to form the waterproof layer; the bonding layer is arranged on the surface of the outer fabric and the functional film, and is flatly stacked together, and then is moved to a pressing and ironing machine to be pressed and ironed to complete hot-pressing and film laminating; the bonding layer is arranged on the surface of the inner fabric and the other side of the functional film, and is flatly stacked together, and then is moved to the pressing and ironing machine to be pressed and ironed to complete hot-pressing and film laminating, so as to obtain the warm-keeping, waterproof and moisture-permeable functional composite fabric. The composite fabric has good functions of warm-keeping, waterproofing, moisture permeability, flame resistance and the like.

Description

Technical Field

[0001] This invention relates to a composite fabric with heat insulation, waterproof and breathable functions, belonging to the field of functional textile fabrics. Background Technology

[0002] Waterproof and breathable composite fabrics are made by bonding one or more layers of woven fabric to a polymer film using adhesives, forming a multi-functional fabric. This type of fabric can meet the needs of people in harsh environments such as extreme cold, rain, snow, and strong winds, and has broad application prospects. On the other hand, due to their distinctive characteristics, waterproof and breathable fabrics are also developing towards personalization and optimization. For example, they are used to make lighter, more comfortable, and multifunctional winter outdoor clothing. Laminated fabrics, as traditional winter clothing materials, possess excellent waterproof and breathable properties, greatly improving windproof and warmth retention capabilities. This reduces the amount of insulation material needed, effectively reducing the weight of winter clothing and improving its functionality and comfort. Summary of the Invention

[0003] The purpose of this invention is to provide a composite fabric with thermal insulation, waterproofing, and breathability. By applying waterproofing treatments to the fabric and combining it with a functional film, the fabric acquires functions such as waterproofing, breathability, and thermal insulation.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] A thermally insulating, waterproof, and breathable composite fabric includes an outer fabric, an inner fabric, a functional film, a waterproof layer applied to the surface of the outer fabric, and an adhesive layer that bonds the outer fabric, the inner fabric, and the functional film.

[0006] The waterproof layer is composed of a mixture of silicone-modified acrylate emulsion and silica sol;

[0007] The preparation method of the organosilicon-modified acrylate emulsion is as follows:

[0008] Add 26 parts butyl acrylate, 10 parts methyl methacrylate, 8 parts styrene, 1 part acrylic acid, 1.2 parts sodium dodecyl sulfate, 0.6 parts AEO-9, 0.4 parts OS-15, 5 parts KH570, and 270 parts water to a stirrer, stir, and emulsify for 0.5 hours to form a pre-emulsion; dissolve 0.5 parts potassium persulfate in 10 parts water to form an initiator aqueous solution.

[0009] Take 1 / 3 of the pre-emulsion and place it in the reactor. Heat it in a water bath. When the temperature rises to 70°C, add 1 / 3 of the initiator aqueous solution. After the emulsion turns blue, keep it at the temperature for 0.5 hours.

[0010] Add the remaining 2 / 3 of the pre-emulsion, 20 parts of the vinylsiloxane emulsion, and 2 / 3 of the initiator aqueous solution dropwise;

[0011] When 1 / 3 of the pre-emulsion remains, slowly and evenly add 12 parts of phosphorus-PDMS.

[0012] After the addition was complete, the temperature was raised to 80°C and the reaction was maintained for 0.5 hours. Then the temperature was lowered and the mixture was filtered to obtain an organosilicon-modified acrylate emulsion.

[0013] The method for preparing the silica sol is as follows:

[0014] In a reactor, 200 parts of deionized water, 0.4 parts of AEO3, 0.6 parts of AEO9, 1.2 parts of sodium dodecyl sulfate, and 1.2 parts of NaOH solution (10% by mass) were added and stirred at a constant speed to disperse the solution evenly. Then, 40 parts of methyltrimethoxysilane were added over 2 hours. 6 parts of phosphorus-containing siloxane were added. The mixture was reacted at room temperature and hydrolyzed and condensed for 24 hours to obtain a silica sol emulsion.

[0015] The outer fabric is a 100D fully matte mechanical polyester elastic fabric.

[0016] The inner layer fabric is 100D / 144F polyester fleece.

[0017] The functional film is a PU film with a thickness of 15μm.

[0018] The adhesive layer is a polyurethane hot melt adhesive.

[0019] Preparation method of composite fabric with heat insulation, waterproof and breathable functions:

[0020] Step a: Prepare the waterproof finishing solution according to the process formula;

[0021] Step b: Immerse the outer fabric in a waterproof finishing solution, then roll it in, pre-dry, and bake it to form a waterproof layer;

[0022] Step c: Apply an adhesive layer to the surface of the outer fabric and the functional film, stack them flat together, and then transfer them to a heat press machine for heat pressing to complete the hot pressing lamination.

[0023] Step d: Apply an adhesive layer to the surface of the inner fabric and the other side of the functional film, stack them flat together, and then transfer them to a heat press machine for heat pressing to complete the hot pressing and lamination, thus obtaining a warm, waterproof and breathable functional composite fabric.

[0024] The present invention relates to a composite fabric with thermal insulation, waterproof and breathable properties. Its waterproof layer is made of a mixture of silicone-modified acrylic emulsion and silica sol. It can form a low surface energy film on the fabric surface and change the roughness of the fabric surface, thereby synergistically enhancing the water repellency of the fabric surface.

[0025] Organosilicon side chains form a comb-like polymer on the acrylate polymer backbone. The side-branched organosilicon molecular chains endow the acrylate with good water resistance. The long, comb-like organosilicon side chains have high mobility and low surface tension, allowing the organosilicon to migrate to the air interface during film formation, forming a hydrophobic protective layer on the film surface.

[0026] Acrylic emulsions possess excellent film-forming properties, adhesion, weather resistance, and compatibility with both polar and non-polar polymers. When combined with silicone, they can overcome the shortcomings of single-component silicone emulsions, such as poor film-forming strength and washability on fabric surfaces. Therefore, modifying nano-silicone emulsions with acrylic emulsions can enhance the waterproof performance of fabrics.

[0027] PU film is a non-porous hydrophilic film. Because the film itself has no pores, it provides excellent waterproofing while also making the fabric windproof and warm. Fabrics laminated with PU film exhibit good waterproof, windproof, and cold-resistant properties.

[0028] The inner fabric plays a crucial protective role in the composite fabric that combines warmth, water resistance, and breathability. It sits between the skin and the PU film, creating a space that retains still air, thus achieving windproof and warmth-keeping effects.

[0029] Phosphorus-containing PDMS and phosphorus-containing siloxanes belong to organic-inorganic hybrids, including hydrolyzable and condensable reactive inorganic siloxane groups and phosphorus-containing organic flame-retardant groups. These compounds have good thermal stability and readily form an inorganic oxygen-barrier thermal insulation protective layer containing Si-O-Si or Si-C at high temperatures, thereby achieving flame retardancy. Phosphorus-containing siloxanes are hydrolyzed and condensed with methyltrimethoxysilane to form a sol, which is applied to fabrics and dried to form a Si-O-Si network structure on the fiber surface, increasing the thermal stability of the fibers. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the fabric structure in Example 1.

[0031] Figure 2 This is a SEM image of the fabric from Example 1.

[0032] Figure 3 This is a static contact angle diagram of the fabric in Example 1. Detailed Implementation

[0033] Unless otherwise specified, the term "parts" in this invention refers to "parts by mass".

[0034] This invention discloses a thermal, waterproof and breathable composite fabric, comprising an outer fabric, an inner fabric, a functional film, a waterproof layer applied to the surface of the outer fabric, and an adhesive layer for bonding the outer fabric, the inner fabric and the functional film.

[0035] The waterproof layer is composed of silicone-modified acrylate emulsion and silica sol mixed in a mass ratio of 7:3.

[0036] The method for preparing the silica sol is as follows:

[0037] In a reactor, 200 parts of deionized water, 0.4 parts of AEO3, 0.6 parts of AEO9, 1.2 parts of sodium dodecyl sulfate, and 1.2 parts of NaOH solution (10% by mass) were added and stirred at a constant speed to disperse the solution evenly. Then, 40 parts of methyltrimethoxysilane were added over 2 hours. 6 parts of phosphorus-containing siloxane were added. The mixture was reacted at room temperature and hydrolyzed and condensed for 24 hours to obtain a silica sol emulsion.

[0038] The preparation method of the phosphorus-containing siloxane is as follows:

[0039] 0.15 mol of diethyl chlorophosphonate and 50 mL of tetrahydrofuran were added to a clean three-necked flask. The mixture was then protected with nitrogen under ice bath conditions. 0.15 mol of N-methylethanolamine and 0.15 mol of triethylamine were added, and the mixture was stirred for 4 h under ice bath conditions. After filtration, tetrahydrofuran was removed by vacuum distillation to obtain the intermediate.

[0040] In a four-necked flask equipped with a stirrer, thermometer, and condenser, 0.1 mol of the intermediate and 150 ml of DMF (N,N-dimethylformamide) were added. The mixture was heated to 90 °C with stirring and activated for 30 min. Under nitrogen protection, 0.1 mol of KH560 was added, and the temperature was raised to 80 °C. The reaction was maintained at this temperature for 24 hours. The mixture was filtered, and the DMF in the filtrate was removed by rotary evaporation. Ethyl acetate was added to dissolve the DMF, and the solution was washed three times each with dilute hydrochloric acid, 10% NaOH solution, and saturated NaCl solution. Finally, the solvent was removed by rotary evaporation to obtain the product, i.e., the phosphorus-containing siloxane. The reaction process is as follows:

[0041] As shown in Equations 1 and 2.

[0042]

[0043] The preparation method of the organosilicon-modified acrylate emulsion is as follows:

[0044] Add 26 parts butyl acrylate, 10 parts methyl methacrylate, 8 parts styrene, 1 part acrylic acid, 1.2 parts sodium dodecyl sulfate, 0.6 parts AEO-9, 0.4 parts OS-15, 5 parts KH570, and 270 parts water to a stirrer, stir, and emulsify for 0.5 hours to form a pre-emulsion; dissolve 0.5 parts potassium persulfate in 10 parts water to form an initiator aqueous solution.

[0045] Take 1 / 3 of the pre-emulsion and place it in the reactor. Heat it in a water bath. When the temperature rises to 70°C, add 1 / 3 of the initiator aqueous solution. After the emulsion turns blue, keep it at the temperature for 0.5 hours.

[0046] Add the remaining 2 / 3 of the pre-emulsion, 20 parts of the vinylsiloxane emulsion, and 2 / 3 of the initiator aqueous solution dropwise;

[0047] When 1 / 3 of the pre-emulsion remains, add 12 parts of phosphorus-PDMS.

[0048] After the addition was complete, the temperature was raised to 80°C and the reaction was maintained for 0.5 hours. Then the temperature was lowered and the mixture was filtered to obtain an organosilicon-modified acrylate emulsion.

[0049] The vinylsiloxane emulsion is composed of D4 (octamethylcyclotetrasiloxane) and D4 Vi It is prepared by reacting tetramethyltetravinylcyclotetrasiloxane, emulsifier, catalyst, and water. The specific steps are as follows: 20 parts of D4 and 3 parts of D4 Vi 1 part sodium dodecylbenzenesulfonate, 0.5 parts AEO-9, 0.5 parts AEO-3, 1 part dodecylbenzenesulfonic acid, and 80 parts water were added to the reactor and stirred and emulsified for 1 hour. Then the temperature was raised to 83-85℃ in a water bath and kept at this temperature for 5 hours. After cooling and filtration, a vinylsiloxane emulsion was obtained.

[0050] KH-570, γ-methacryloyloxypropyl, a commercially available product.

[0051] The phosphorus-containing PDMS is prepared by the following method:

[0052] A measured amount of phosphorus-containing siloxane and IPDI (isophorone diisocyanate) were loaded into a reactor under nitrogen protection. A small amount of dibutyltin dilaurate was added to catalyze the reaction, and the temperature was slowly raised to 70°C. The reaction was carried out for about 2 hours until the isocyanate value reached the theoretical content. A measured amount of monohydroxy-terminated dimethicone (Mn = 1000) was added, and the reaction continued until the isocyanate value reached the new theoretical content, yielding the product phosphorus-containing PDMS. The molar ratio of phosphorus-containing siloxane, IPDI, and monohydroxy-terminated dimethicone was 1:1:1. The reaction process is shown in reaction formula 3.

[0053]

[0054] The outer fabric is a 100D fully matte mechanical polyester elastic fabric, and its composition is 100% polyester.

[0055] Specifications: 100D / 72F×100D / 72F; Warp and weft density: 45*32 (threads / cm).

[0056] The inner layer fabric is 100D / 144F polyester fleece.

[0057] The functional film is a PU film with a thickness of 15μm, a commercially available product, and has a moisture-permeable function.

[0058] The adhesive layer is a commercially available polyurethane hot melt adhesive.

[0059] Before being laminated with the functional film, the inner layer fabric undergoes a hydrophilic treatment:

[0060] Phosphorus-containing siloxanes, DP-9992 (hydrophilic agent) is mixed with water to prepare hydrophilic finishing solutions with contents of 15g / L and 20g / L respectively. The inner layer fabric is dipped and rolled once (with a roll-off rate of 60-70%), pre-dried at 100℃, and then set and dried at 170℃.

[0061] Preparation method of composite fabric with heat insulation, waterproof and breathable functions:

[0062] Step a: Prepare the waterproof finishing solution according to the process formula;

[0063] Step b: Immerse the outer fabric in a waterproof finishing solution, then roll it in, pre-dry, and bake it to form a waterproof layer;

[0064] Step c: Apply an adhesive layer to the surface of the outer fabric and the functional film, stack them flat together, and then transfer them to a heat press machine for heat pressing to complete the hot pressing lamination.

[0065] Step d: The inner layer fabric undergoes hydrophilic finishing; an adhesive layer is set on the surface of the inner layer fabric and the surface on the other side of the functional film, and the layers are stacked flat together. Then, they are moved to a heat press machine for heat pressing to complete the hot pressing and lamination, thus obtaining a thermally insulating, waterproof and breathable composite fabric.

[0066] Example 1:

[0067] A thermal, waterproof and breathable composite fabric includes an outer fabric, an inner fabric, a functional film, a waterproof layer applied to the surface of the outer fabric, and an adhesive layer for bonding the outer fabric, the inner fabric and the functional film; the outer fabric is a 100D fully matte mechanical polyester elastic fabric and the inner fabric is a 100D / 144F polyester fleece.

[0068] The preparation method of the composite fabric with heat insulation, waterproof and breathable functions is as follows:

[0069] Step a: Mix the silicone-modified acrylate emulsion and silica sol at a mass ratio of 7:3, and prepare a waterproof finishing solution with a mass concentration of 100g / L with water.

[0070] Step b: Immerse the outer fabric in a waterproof finishing solution, dip and roll (residual rate 60-70%), dry at 100℃, and bake at 160℃ to form a waterproof layer on the fabric surface.

[0071] Step c: Apply an adhesive layer to the surface of the outer fabric and the functional film, stack them flat together, and then transfer them to a heat press for heat pressing and lamination.

[0072] Step d: The inner layer fabric undergoes hydrophilic finishing; an adhesive layer is set on the surface of the inner layer fabric and the surface on the other side of the functional film, and the layers are stacked flat together. Then, they are moved to a heat press machine for heat pressing to complete the hot pressing and lamination, thus obtaining a thermally insulating, waterproof and breathable composite fabric.

[0073] The adhesive layer (adhesive dots) covers 30% of the surface of the fabric and film. The composite pressing pressure is 4 kg, the temperature is 110℃, the hot pressing time is 30 s, and the speed is 5 m / min.

[0074] The preparation method of the organosilicon-modified acrylate emulsion is as follows:

[0075] Add 26 parts butyl acrylate, 10 parts methyl methacrylate, 8 parts styrene, 1 part acrylic acid, 1.2 parts sodium dodecyl sulfate, 0.6 parts AEO-9, 0.4 parts OS-15, 5 parts KH570, and 270 parts water to a stirrer, stir, and emulsify for 0.5 hours to form a pre-emulsion; dissolve 0.5 parts potassium persulfate in 10 parts water to form an initiator aqueous solution.

[0076] Take 1 / 3 of the pre-emulsion and place it in the reactor. Heat it in a water bath. When the temperature rises to 70°C, add 1 / 3 of the initiator aqueous solution. After the emulsion turns blue, keep it at the temperature for 0.5 hours.

[0077] Add the remaining 2 / 3 of the pre-emulsion, 20 parts of the vinylsiloxane emulsion, and 2 / 3 of the initiator aqueous solution dropwise;

[0078] When 1 / 3 of the pre-emulsion remains, slowly and evenly add 12 parts of phosphorus-PDMS.

[0079] After the addition was complete, the temperature was raised to 80°C and the reaction was maintained for 0.5 hours. Then the temperature was lowered and the mixture was filtered to obtain an organosilicon-modified acrylate emulsion.

[0080] The method for preparing the silica sol is as follows:

[0081] In a reactor, 200 parts of deionized water, 0.4 parts of AEO3, 0.6 parts of AEO9, 1.2 parts of sodium dodecyl sulfate, and 1.2 parts of NaOH solution (10% by mass) were added and stirred at a constant speed to disperse the solution evenly. Then, 40 parts of methyltrimethoxysilane were added over 2 hours. 6 parts of phosphorus-containing siloxane were added. The mixture was reacted at room temperature and hydrolyzed and condensed for 24 hours to obtain a silica sol emulsion.

[0082] The performance test results of the composite fabric with thermal insulation, waterproof and breathable functions are as follows:

[0083] Water-repellent performance: 100 points.

[0084] Moisture permeability: 13247g / m 2 24h

[0085] Flame retardant performance: afterflame time 0s, smoldering time 0s, damage length 13.3cm.

[0086] Static contact angle: 128°.

[0087] Water repellency performance is tested according to AATCC-22.

[0088] The moisture permeability test was performed according to JIS L 1099:2012; Method B-1.

[0089] Flame retardant properties were tested according to GB / T 5455—2014 "Vertical Method for Testing the Burning Performance of Textiles".

[0090] The contact angle was measured using a contact angle measuring instrument.

Claims

1. A thermally insulating, waterproof, and breathable composite fabric, comprising an outer fabric, an inner fabric, a functional film, a waterproof layer applied to the surface of the outer fabric, and an adhesive layer for bonding the outer fabric, the inner fabric, and the functional film. The waterproof layer is composed of a mixture of silicone-modified acrylate emulsion and silica sol; The preparation method of the organosilicon-modified acrylate emulsion is as follows: Add 26 parts butyl acrylate, 10 parts methyl methacrylate, 8 parts styrene, 1 part acrylic acid, 1.2 parts sodium dodecyl sulfate, 0.6 parts AEO-9, 0.4 parts OS-15, 5 parts KH570, and 270 parts water to a stirrer, stir, and emulsify for 0.5 hours to form a pre-emulsion; dissolve 0.5 parts potassium persulfate in 10 parts water to form an initiator aqueous solution. Take 1 / 3 of the pre-emulsion and place it in the reactor. Heat it in a water bath. When the temperature rises to 70°C, add 1 / 3 of the initiator aqueous solution. After the emulsion turns blue, keep it at the temperature for 0.5 hours. Add the remaining 2 / 3 of the pre-emulsion, 20 parts of the vinylsiloxane emulsion, and 2 / 3 of the initiator aqueous solution dropwise; When 1 / 3 of the pre-emulsion remains, slowly and evenly add 12 parts of phosphorus-PDMS. After the addition was complete, the temperature was raised to 80°C and the reaction was maintained at this temperature for 0.5 hours. Then the temperature was lowered and the mixture was filtered to obtain the modified acrylic emulsion. The method for preparing the silica sol is as follows: In a reactor, 200 parts of deionized water, 0.4 parts of AEO3, 0.6 parts of AEO9, 1.2 parts of sodium dodecyl sulfate, and 1.2 parts of NaOH solution were added and stirred at a constant speed to disperse the mixture evenly. Then, 40 parts of methyltrimethoxysilane were added over 2 hours. Next, 6 parts of phosphorus-containing siloxane were added. The mixture was reacted at room temperature and hydrolyzed and condensed for 24 hours to obtain a modified silica sol emulsion.

2. The composite fabric with heat insulation, waterproof and breathable properties as described in claim 1, characterized in that: The outer fabric is a 100D fully matte mechanical polyester elastic fabric.

3. The composite fabric with heat insulation, waterproof and breathable properties as described in claim 1, characterized in that: The inner layer fabric is 100D / 144F polyester fleece.

4. The composite fabric with heat insulation, waterproof and breathable properties as described in claim 1, characterized in that: The functional film is a PU film with a thickness of 15μm.

5. The composite fabric with heat insulation, waterproof and breathable properties as described in claim 1, characterized in that: The adhesive layer is a polyurethane hot melt adhesive.

6. A method for preparing a thermally insulating, waterproof, and breathable composite fabric as described in claim 1, comprising the following steps: Step a: Prepare the waterproof finishing solution according to the process formula; Step b: Immerse the outer fabric in a waterproof finishing solution, then roll it in, pre-dry, and bake it to form a waterproof layer; Step c: Apply an adhesive layer to the surface of the outer fabric and the functional film, stack them flat together, and then transfer them to a heat press for heat pressing and lamination. Step d: The inner layer fabric undergoes hydrophilic finishing; an adhesive layer is set on the surface of the inner layer fabric and the surface on the other side of the functional film, and the layers are stacked flat together. Then, they are moved to a heat press machine for heat pressing to complete the hot pressing and lamination, thus obtaining a thermally insulating, waterproof and breathable composite fabric.

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