A bio-based nylon three-layer patch fabric and its preparation method and application

Abstract

The present invention discloses a bio-based nylon three-layer fabric, its preparation method, and application. The fabric comprises a bio-based nylon face fabric, a bio-based membrane, and a base fabric bonded sequentially. The bio-based membrane contains bio-based polyurethane (PU) and polydimethylsiloxane (PDMS). The side of the bio-based membrane bonded to the bio-based nylon face fabric is deposited with bio-based PU / PDMS microspheres. The side of the bio-based membrane bonded to the base fabric is deposited with a PDMS film layer modified by organosilane cross-linking, doped with polyallylamine hydrochloride, and grafted with polyhexamethyleneguanidine hydrochloride on the surface of the PDMS film layer. Made of bio-based nylon, the fabric is environmentally friendly and exhibits excellent waterproof, moisture permeability, and washability.

Description

Technical Field

[0001] The invention relates to a bio-based nylon three-layer pasting fabric and a preparation method and application thereof, belonging to the technical field of textile clothing. Background Art

[0002] Globally, over 9 million tons of nylon are produced annually, with China accounting for over 30% of global nylon consumption. Nylon production is overly dependent on petrochemical raw materials, resulting in serious resource and environmental challenges. Addressing these issues is currently a major concern. Therefore, developing new sustainable development technologies and replacing traditional petroleum products with advanced renewable energy technologies is crucial. Research results indicate that bio-based nylon 56 has a relatively concentrated degree of polymerization (DP) distribution, a low molecular weight, and is easier to process. Pentamethylenediamine is considered an effective alternative, reacting with adipic acid to form a novel organic carbon complex. This can be synthesized using microorganisms, enabling efficient resource recycling. Bio-based nylon 56 offers excellent heat resistance and environmental friendliness, not only meeting the specific properties of nylon 66 but also offering a sustainable alternative to traditional petroleum-based nylon, demonstrating promising application prospects.

[0003] As a high-consumption industry, the apparel industry has an unshirkable responsibility for the research and development and use of renewable and sustainable materials. With the growing enthusiasm for outdoor sports, the use of outdoor jacket fabrics is steadily increasing. However, most jackets currently on the market are made of ordinary petroleum-based polyester and petroleum-based nylon, which is not environmentally friendly. Furthermore, their waterproofness, moisture permeability, and washability still need to be improved. Summary of the Invention

[0004] The purpose of the present invention is to provide a bio-based nylon three-layer pasting fabric and its preparation method and application. The fabric uses bio-based nylon material, is environmentally friendly, and has excellent waterproof and breathable properties and washability.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A bio-based nylon three-layer fabric comprises a bio-based nylon face fabric, a bio-based film, and a base fabric bonded in sequence, wherein the bio-based film contains bio-based PU and PDMS, and the mass ratio of the bio-based PU to the PDMS is (1-3):1;

[0007] Bio-based PU / PDMS microspheres are deposited on one side of the bio-based membrane bonded to the bio-based nylon face cloth, wherein the mass ratio of bio-based PU to PDMS in the bio-based PU / PDMS microspheres is (1-5):1;

[0008] A PDMS film layer modified by cross-linking with an organic silane is deposited on one side of the bio-based membrane bonded to the base fabric, polyallylamine hydrochloride is doped in the PDMS film layer, and polyhexamethyleneguanidine hydrochloride is grafted on the surface of the PDMS film layer; in the PDMS film layer, the mass ratio of PDMS, organic silane, polyallylamine hydrochloride and polyhexamethyleneguanidine hydrochloride is (20-30):(1-4):(1-2):(1-2).

[0009] Preferably, the yarn of the bio-based nylon face fabric is: bio-based PA56 yarn, 20D / 24F DTY FD, 26-40 mesh points;

[0010] The base fabric is nylon cot fabric.

[0011] Preferably, the preparation method of the bio-based membrane is:

[0012] S1, dissolving bio-based PU and PDMS in a first mixed solvent of DMF and TMF to prepare a first spinning solution, and then forming the first spinning solution into a PU / PDMS membrane by electrospinning;

[0013] S2, dissolving the bio-based PU and PDMS in a second mixed solvent of DMF and TMF to prepare a second spinning solution, and then spraying the second spinning solution onto one side of the PU / PDMS membrane by electrostatic spraying, followed by vacuum drying;

[0014] S3, dispersing PDMS, organosilane, and polyallylamine hydrochloride in n-heptane, then dropwise adding dibutyltin dilaurate, stirring, and then standing for degassing to obtain a film-forming solution; dissolving polyhexamethyleneguanidine hydrochloride in ethanol to obtain a coating solution;

[0015] S4. First, spray the membrane-forming liquid on the other side of the PU / PDMS membrane to form a membrane layer after deposition, then dip-coat the coating liquid onto the surface of the membrane layer, and vacuum dry to obtain the bio-based membrane.

[0016] Preferably, in step S1, in the first mixed solvent, the mass ratio of DMF to TMF is (1-2):1, and the mass fraction of bio-based PU and PDMS in the mixed solvent is 20-25%.

[0017] Preferably, in step S2, in the second mixed solvent, the mass ratio of DMF to TMF is (1-2):1, and the mass fraction of bio-based PU and PDMS in the mixed solvent is 8-15%.

[0018] Preferably, in step S2, the vacuum drying conditions are: 50-60° C., 5-8 h.

[0019] Preferably, in step S3, the concentration of the PDMS, organosilane and polyallylamine hydrochloride in n-heptane is 20-30%, and the amount of dibutyltin dilaurate added is 2-5% of the mass of PDMS.

[0020] Preferably, in step S3, the organosilane is γ-glycidyloxypropyltrimethoxysilane;

[0021] The vacuum drying conditions are: 50-80°C, 6-10h.

[0022] The preparation method of any of the above-mentioned bio-based nylon three-layer pasted fabrics specifically comprises the following steps: firstly weaving a bio-based nylon face fabric and performing dyeing, finishing, waterproofing and shaping treatments; then bonding the bio-based nylon face fabric to a bio-based membrane and then bonding a third layer of base fabric; and finally trimming and finishing to obtain the fabric.

[0023] Use of any of the above-mentioned bio-based nylon three-layer patch fabrics in the preparation of jackets.

[0024] The beneficial effects of the present invention are:

[0025] 1. Unlike unsustainable traditional petroleum-based nylon materials, the face fabric of this invention uses bio-based polymer materials, the second membrane layer uses a bio-based PU highly waterproof and breathable membrane, and the third base fabric uses recyclable nylon cot. These can effectively alleviate the resource pressure brought by petroleum-based polyamides and provide an effective solution to environmental problems such as resource depletion and global warming.

[0026] 2. The bio-based membrane layer achieves a hydrophobic effect by depositing PU / PDMS microspheres on the surface bonded to the bio-based nylon face fabric, and deposits an organosilane cross-linked modified PDMS membrane layer on the surface bonded to the base fabric to further enhance the hydrophobic effect, thereby enabling the bio-based membrane layer to achieve a waterproof effect. At the same time, by waterproofing the face fabric, the overall waterproof effect of the fabric is further enhanced.

[0027] 3. By doping polyallylamine hydrochloride into the PDMS film layer and grafting polyhexamethyleneguanidine hydrochloride on the surface of the film layer, on the one hand, the hydrophilicity of polyhexamethyleneguanidine hydrochloride can be utilized to absorb gaseous moisture or liquid sweat secreted from the surface of human skin, thereby keeping the base fabric dry and improving wearing comfort. On the other hand, polyhexamethyleneguanidine hydrochloride can also be used to improve the antibacterial effect; at the same time, by utilizing the amine hydrochloride groups of the polyallylamine hydrochloride dispersed in the film layer and the ionic dipole effect of water molecules, the mass transfer rate of water molecules is promoted, so that water vapor can be discharged faster.

[0028] 4. The organosilane cross-linked modified PDMS can better combine with the PU and PDMS of the bio-based membrane. At the same time, polyallylamine hydrochloride and polyhexamethyleneguanidine hydrochloride can be grafted onto γ-glycidyloxypropyltrimethoxysilane through the ring-opening reaction of amino and epoxy groups, thereby improving the water resistance of the fabric. After multiple washings, it can still ensure excellent waterproof and moisture permeability. DETAILED DESCRIPTION

[0029] The present invention will be specifically described below with reference to the embodiments.

[0030] Example 1

[0031] The preparation method of the bio-based membrane is as follows:

[0032] S1. Dissolve bio-based PU and PDMS in a first mixed solvent of DMF and TMF (DMF, TMF mass ratio 1:1) in a mass ratio of 2:1 to prepare a first spinning solution, and the mass fraction of bio-based PU and PDMS in the mixed solvent is 20%; then use electrospinning (extrusion rate 0.5 mL / h, drum speed 800 r / min, voltage 15 kV, receiving distance 15 cm) to prepare the first spinning solution into a PU / PDMS membrane.

[0033] S2. Dissolve the bio-based PU and PDMS in a second mixed solvent of DMF and TMF (DMF, TMF mass ratio 1:1) in a mass ratio of 2:1 to prepare a second spinning solution, and the mass fraction of bio-based PU and PDMS in the mixed solvent is 10%; then use electrostatic spraying (extrusion rate 0.5 mL / h, drum speed 800 r / min, voltage 15 kV, receiving distance 15 cm) to spray the second spinning solution onto one side of the PU / PDMS membrane, and then dry it in a vacuum drying oven at 50°C for 6 hours.

[0034] S3. After dispersing PDMS, γ-glycidyloxypropyltrimethoxysilane and polyallylamine hydrochloride in n-heptane at a mass ratio of 25:3:1, the mass fraction of PDMS, γ-glycidyloxypropyltrimethoxysilane and polyallylamine hydrochloride in n-heptane is 45%, dibutyltin dilaurate (mass is 3% of the amount of PDMS added) is added dropwise, stirred for 2 hours and then allowed to stand for degassing to obtain a film-forming solution; polyhexamethyleneguanidine hydrochloride (mass ratio to PDMS is 1:25) is dissolved in ethanol to obtain a coating solution.

[0035] S4. First, spray the membrane-forming liquid on the other side of the PU / PDMS membrane, and expose it to the sun at room temperature to form a membrane layer. Then, dip-coat the coating liquid onto the surface of the membrane layer, and dry it in a vacuum drying oven at 80° C. for 8 h to obtain the bio-based membrane.

[0036] A method for preparing a bio-based nylon three-layer jacket fabric comprises the following steps:

[0037] Jingwei Raw Materials uses the key technology of bio-based preparation of 1,5-pentanediamine independently developed in my country. It uses bio-based 1,5-pentanediamine and petroleum-based adipic acid to successfully develop bio-based PA56 with a bio-based content of up to 47%. Compared with pure petroleum-based chemical fibers, the uniformity of PA56 raw materials is lower than that of petroleum-based ones.

[0038] The present invention also trial-produced yarns of the same specification with different network points, and the results were as follows:

[0039] PA56 20D / 24F DTY FD has no network processing, and the yarn is poorly formed after winding, easily broken and loose, causing troubles in subsequent weaving.

[0040] PA56 20D / 24F DTY FD light interlaced processing, the yarn is well formed after winding, with less yarn breakage but loose fibers. Weaving can be completed, but the efficiency is less than 85%, and many defects appear on the grey fabric surface.

[0041] PA56 20D / 24F DTY FD is processed in a medium interlaced manner. The yarn is well wound and formed, with very little yarn breakage or loose fibers. The weaving efficiency is 93%, and the fabric surface is good.

[0042] Therefore, the present invention adopts fine-denier bio-based PA56 low-stretch yarn 20D / 24F DTY FD, increases its network points from the conventional 17-20 to about 28, an increase of about 40%. This not only ensures the stretch yarn style of DTY, but also enhances the bonding between its monofilaments, optimizes its spinning technology, and is conducive to improving weaving efficiency.

[0043] In weaving, PA56 20D / 24F DTY FD of the same specification is used, and two roots are threaded through the same heald to form the warp grid lines. In the weft direction, two roots of PA56 20D / 24F DTY FD are used and sprayed to form the weft grid lines. A fine square checkered texture is formed on the overall surface of the fabric. The size of the warp and weft checkered patterns is 1mm*1mm, which ensures the weaving stability of the fabric and increases the fabric recognition.

[0044] The warp and weft density used is 240 / int in the warp direction and 204t / int in the weft direction. The woven weight is 49g / m 2 The woven texture is plain weave. The woven appearance can vary in size and checkered texture, depending on the texture design.

[0045] The prepared warp beam is threaded through the heddle and reed, then brought to the loom. The weft yarn is prepared and weaving is done using a water jet loom. The workshop temperature and humidity are required to be 20-25°C and 65%±5% respectively. The loom speed is set to 530r / min and the upper tension is 1500N.

[0046] Dyeing, finishing and shaping: After the grey cloth is completed, the fabric will be pre-shrunk in open width - cold piled - pre-shaped - overflow dyeing - drying - waterproofing treatment - high temperature shaping - out of the vat.

[0047] The waterproofing treatment uses a fluorine-free water repellent, Barrier ECO-DRY, at a 4% concentration, and a crosslinker, Effect PAX, at a 0.8% concentration. The setting machine is set at a speed of 20 m / min, a temperature of 170°C, and a high-temperature setting time of 60 seconds. This high-temperature setting time must be maintained at approximately 60 seconds to allow the fluorine-free water repellent to more firmly bond with the fabric and form a reinforced crosslink at high temperatures, ensuring a waterproofing effect.

[0048] A bio-based membrane was selected for compounding. The side of the bio-based membrane deposited with PU / PDMS microspheres was bonded to the inner surface of the face fabric. After compounding, the glue was completely cured and bonded under constant temperature and humidity for 24 hours. Then, the third layer of base fabric 10D recycled nylon was compounded. After compounding, the bonding was done in the same way as the middle layer of bio-based membrane, and then the glue was cured and bonded under constant temperature and humidity for 24 hours.

[0049] After gluing is completed, the edges and corners are trimmed to obtain the bio-based nylon three-layer jacket fabric.

[0050] Comparative Example 1

[0051] The process is basically the same as Example 1, except that, when preparing the bio-based membrane, in step S3, γ-glycidyloxypropyltrimethoxysilane is not added.

[0052] Specifically, the preparation method of the bio-based membrane is as follows:

[0053] S1. Dissolve bio-based PU and PDMS in a first mixed solvent of DMF and TMF (DMF, TMF mass ratio 1:1) in a mass ratio of 2:1 to prepare a first spinning solution, and the mass fraction of bio-based PU and PDMS in the mixed solvent is 20%; then use electrospinning (extrusion rate 0.5 mL / h, drum speed 800 r / min, voltage 15 kV, receiving distance 15 cm) to prepare the first spinning solution into a PU / PDMS membrane.

[0054] S2. Dissolve the bio-based PU and PDMS in a second mixed solvent of DMF and TMF (DMF, TMF mass ratio 1:1) in a mass ratio of 2:1 to prepare a second spinning solution, and the mass fraction of bio-based PU and PDMS in the mixed solvent is 10%; then use electrostatic spraying (extrusion rate 0.5 mL / h, drum speed 800 r / min, voltage 15 kV, receiving distance 15 cm) to spray the second spinning solution onto one side of the PU / PDMS membrane, and then dry it in a vacuum drying oven at 50°C for 6 hours.

[0055] S3. After dispersing PDMS and polyallylamine hydrochloride in n-heptane at a mass ratio of 25:1, the mass fraction of PDMS and polyallylamine hydrochloride in n-heptane is 45%, dibutyltin dilaurate (the mass is 3% of the amount of PDMS added) is added dropwise, stirred for 2 hours and then allowed to stand for degassing to obtain a membrane-forming solution; polyhexamethyleneguanidine hydrochloride (with a mass ratio of 1:25 to PDMS) is dissolved in ethanol to obtain a coating solution.

[0056] S4. First, spray the membrane-forming liquid on the other side of the PU / PDMS membrane, and expose it to the sun at room temperature to form a membrane layer. Then, dip-coat the coating liquid onto the surface of the membrane layer, and dry it in a vacuum drying oven at 80° C. for 8 h to obtain the bio-based membrane.

[0057] A method for preparing a bio-based nylon three-layer jacket fabric comprises the following steps:

[0058] Using fine-denier bio-based PA56 low-stretch yarn 20D / 24F DTY FD, the network points are increased from the conventional 17-20 to about 28, an increase of about 40%. This not only ensures the stretch style of DTY, but also enhances the bonding between its monofilaments, optimizes its spinning technology, and is conducive to improving weaving efficiency.

[0059] In weaving, PA56 20D / 24F DTY FD of the same specification is used, and two roots are threaded through the same heald to form the warp grid lines. In the weft direction, two roots of PA56 20D / 24F DTY FD are used and sprayed to form the weft grid lines. A fine square checkered texture is formed on the overall surface of the fabric. The size of the warp and weft checkered patterns is 1mm*1mm, which ensures the weaving stability of the fabric and increases the fabric recognition.

[0060] The warp and weft density used is 240 / int in the warp direction and 204t / int in the weft direction. The woven weight is 49g / m 2 The woven texture is plain weave. The woven appearance can vary in size and checkered texture, depending on the texture design.

[0061] The prepared warp beam is threaded through the heddle and reed, then brought to the loom. The weft yarn is prepared and weaving is done using a water jet loom. The workshop temperature and humidity are required to be 20-25°C and 65%±5% respectively. The loom speed is set to 530r / min and the upper tension is 1500N.

[0062] Dyeing, finishing and shaping: After the grey cloth is completed, the fabric will be pre-shrunk in open width - cold piled - pre-shaped - overflow dyeing - drying - waterproofing treatment - high temperature shaping - out of the vat.

[0063] The waterproofing treatment uses a fluorine-free water repellent, Barrier ECO-DRY, at a 4% concentration, and a crosslinker, Effect PAX, at a 0.8% concentration. The setting machine is set at a speed of 20 m / min, a temperature of 170°C, and a high-temperature setting time of 60 seconds. This high-temperature setting time must be maintained at approximately 60 seconds to allow the fluorine-free water repellent to more firmly bond with the fabric and form a reinforced crosslink at high temperatures, ensuring a waterproofing effect.

[0064] A bio-based membrane was selected for compounding. The side of the bio-based membrane deposited with PU / PDMS microspheres was bonded to the inner surface of the face fabric. After compounding, the glue was completely cured and bonded under constant temperature and humidity for 24 hours. Then, the third layer of base fabric 10D recycled nylon was compounded. After compounding, the bonding was done in the same way as the middle layer of bio-based membrane, and then the glue was cured and bonded under constant temperature and humidity for 24 hours.

[0065] After gluing is completed, the edges and corners are trimmed to obtain the bio-based nylon three-layer jacket fabric.

[0066] Comparative Example 2

[0067] The process is basically the same as Example 1, except that, when preparing the bio-based membrane, polyallylamine hydrochloride is not added in step S3.

[0068] Specifically, the preparation method of the bio-based membrane is as follows:

[0069] S1. Dissolve bio-based PU and PDMS in a first mixed solvent of DMF and TMF (DMF, TMF mass ratio 1:1) in a mass ratio of 2:1 to prepare a first spinning solution, and the mass fraction of bio-based PU and PDMS in the mixed solvent is 20%; then use electrospinning (extrusion rate 0.5 mL / h, drum speed 800 r / min, voltage 15 kV, receiving distance 15 cm) to prepare the first spinning solution into a PU / PDMS membrane.

[0070] S2. Dissolve the bio-based PU and PDMS in a second mixed solvent of DMF and TMF (DMF, TMF mass ratio 1:1) in a mass ratio of 2:1 to prepare a second spinning solution, and the mass fraction of bio-based PU and PDMS in the mixed solvent is 10%; then use electrostatic spraying (extrusion rate 0.5 mL / h, drum speed 800 r / min, voltage 15 kV, receiving distance 15 cm) to spray the second spinning solution onto one side of the PU / PDMS membrane, and then dry it in a vacuum drying oven at 50°C for 6 hours.

[0071] S3. After dispersing PDMS and γ-glycidyloxypropyltrimethoxysilane in n-heptane at a mass ratio of 25:3, the mass fraction of PDMS and γ-glycidyloxypropyltrimethoxysilane in n-heptane is 45%, dibutyltin dilaurate (the mass is 3% of the amount of PDMS added) is added dropwise, stirred for 2 hours and then allowed to stand for degassing to obtain a film-forming solution; polyhexamethyleneguanidine hydrochloride (with a mass ratio of 1:25 to PDMS) is dissolved in ethanol to obtain a coating solution.

[0072] S4. First, spray the membrane-forming liquid on the other side of the PU / PDMS membrane, and expose it to the sun at room temperature to form a membrane layer. Then, dip-coat the coating liquid onto the surface of the membrane layer, and dry it in a vacuum drying oven at 80° C. for 8 h to obtain the bio-based membrane.

[0073] A method for preparing a bio-based nylon three-layer jacket fabric comprises the following steps:

[0074] Using fine-denier bio-based PA56 low-stretch yarn 20D / 24F DTY FD, the network points are increased from the conventional 17-20 to about 28, an increase of about 40%. This not only ensures the stretch style of DTY, but also enhances the bonding between its monofilaments, optimizes its spinning technology, and is conducive to improving weaving efficiency.

[0075] In weaving, PA56 20D / 24F DTY FD of the same specification is used, and two roots are threaded through the same heald to form the warp grid lines. In the weft direction, two roots of PA56 20D / 24F DTY FD are used and sprayed to form the weft grid lines. A fine square checkered texture is formed on the overall surface of the fabric. The size of the warp and weft checkered patterns is 1mm*1mm, which ensures the weaving stability of the fabric and increases the fabric recognition.

[0076] The warp and weft density used is 240 / int in the warp direction and 204t / int in the weft direction. The woven weight is 49g / m 2 The woven texture is plain weave. The woven appearance can vary in size and checkered texture, depending on the texture design.

[0077] The prepared warp beam is threaded through the heddle and reed, then brought to the loom. The weft yarn is prepared and weaving is done using a water jet loom. The workshop temperature and humidity are required to be 20-25°C and 65%±5% respectively. The loom speed is set to 530r / min and the upper tension is 1500N.

[0078] Dyeing, finishing and shaping: After the grey cloth is completed, the fabric will be pre-shrunk in open width - cold piled - pre-shaped - overflow dyeing - drying - waterproofing treatment - high temperature shaping - out of the vat.

[0079] The waterproofing treatment uses a fluorine-free water repellent, Barrier ECO-DRY, at a 4% concentration, and a crosslinker, Effect PAX, at a 0.8% concentration. The setting machine is set at a speed of 20 m / min, a temperature of 170°C, and a high-temperature setting time of 60 seconds. This high-temperature setting time must be maintained at approximately 60 seconds to allow the fluorine-free water repellent to more firmly bond with the fabric and form a reinforced crosslink at high temperatures, ensuring a waterproofing effect.

[0080] Select bio-based membrane for compounding, and after compounding, keep constant temperature and humidity for 24 hours until the glue is completely cured and bonded, and then compound the third layer of base fabric 10D recycled nylon Kote. After compounding, it is the same as the middle layer of bio-based membrane, and then keep constant temperature and humidity for 24 hours to cure and bond.

[0081] After gluing is completed, the edges and corners are trimmed to obtain the bio-based nylon three-layer jacket fabric.

[0082] Comparative Example 3

[0083] The method is basically the same as Example 1, except that, when preparing the bio-based membrane, in step S3, a coating liquid is prepared, and in step S4, the surface of the membrane layer is not immersed in the coating liquid.

[0084] Specifically, the preparation method of the bio-based membrane is as follows:

[0085] S1. Dissolve bio-based PU and PDMS in a first mixed solvent of DMF and TMF (DMF, TMF mass ratio 1:1) in a mass ratio of 2:1 to prepare a first spinning solution, and the mass fraction of bio-based PU and PDMS in the mixed solvent is 20%; then use electrospinning (extrusion rate 0.5 mL / h, drum speed 800 r / min, voltage 15 kV, receiving distance 15 cm) to prepare the first spinning solution into a PU / PDMS membrane.

[0086] S2. Dissolve the bio-based PU and PDMS in a second mixed solvent of DMF and TMF (DMF, TMF mass ratio 1:1) in a mass ratio of 2:1 to prepare a second spinning solution, and the mass fraction of bio-based PU and PDMS in the mixed solvent is 10%; then use electrostatic spraying (extrusion rate 0.5 mL / h, drum speed 800 r / min, voltage 15 kV, receiving distance 15 cm) to spray the second spinning solution onto one side of the PU / PDMS membrane, and then dry it in a vacuum drying oven at 50°C for 6 hours.

[0087] S3. After dispersing PDMS, γ-glycidyloxypropyltrimethoxysilane and polyallylamine hydrochloride in n-heptane at a mass ratio of 25:3:1, the mass fraction of PDMS, γ-glycidyloxypropyltrimethoxysilane and polyallylamine hydrochloride in n-heptane is 45%, dibutyltin dilaurate (the mass is 3% of the amount of PDMS added) is added dropwise, stirred for 2 hours and then allowed to stand for degassing to obtain a membrane-forming solution.

[0088] S4. Spray the membrane-forming liquid onto the other side of the PU / PDMS membrane, expose it to the sun at room temperature to form a membrane layer, and then dry it in a vacuum drying oven at 80° C. for 8 h to obtain the bio-based membrane.

[0089] A method for preparing a bio-based nylon three-layer jacket fabric comprises the following steps:

[0090] Using fine-denier bio-based PA56 low-stretch yarn 20D / 24F DTY FD, the network points are increased from the conventional 17-20 to about 28, an increase of about 40%. This not only ensures the stretch style of DTY, but also enhances the bonding between its monofilaments, optimizes its spinning technology, and is conducive to improving weaving efficiency.

[0091] In weaving, PA56 20D / 24F DTY FD of the same specification is used, and two roots are threaded through the same heald to form the warp grid lines. In the weft direction, two roots of PA56 20D / 24F DTY FD are used and sprayed to form the weft grid lines. A fine square checkered texture is formed on the overall surface of the fabric. The size of the warp and weft checkered patterns is 1mm*1mm, which ensures the weaving stability of the fabric and increases the fabric recognition.

[0092] The warp and weft density used is 240 / int in the warp direction and 204t / int in the weft direction. The woven weight is 49g / m 2 The woven texture is plain weave. The woven appearance can vary in size and checkered texture, depending on the texture design.

[0093] The prepared warp beam is threaded through the heddle and reed, then brought to the loom. The weft yarn is prepared and weaving is done using a water jet loom. The workshop temperature and humidity are required to be 20-25°C and 65%±5% respectively. The loom speed is set to 530r / min and the upper tension is 1500N.

[0094] Dyeing, finishing and shaping: After the grey cloth is completed, the fabric will be pre-shrunk in open width - cold piled - pre-shaped - overflow dyeing - drying - waterproofing treatment - high temperature shaping - out of the vat.

[0095] The waterproofing treatment uses a fluorine-free water repellent, Barrier ECO-DRY, at a 4% concentration, and a crosslinker, Effect PAX, at a 0.8% concentration. The setting machine is set at a speed of 20 m / min, a temperature of 170°C, and a high-temperature setting time of 60 seconds. This high-temperature setting time must be maintained at approximately 60 seconds to allow the fluorine-free water repellent to more firmly bond with the fabric and form a reinforced crosslink at high temperatures, ensuring a waterproofing effect.

[0096] Select bio-based membrane for compounding, and after compounding, keep constant temperature and humidity for 24 hours until the glue is completely cured and bonded, and then compound the third layer of base fabric 10D recycled nylon Kote. After compounding, it is the same as the middle layer of bio-based membrane, and then keep constant temperature and humidity for 24 hours to cure and bond.

[0097] After gluing is completed, the edges and corners are trimmed to obtain the bio-based nylon three-layer jacket fabric.

[0098] Comparative Example 4

[0099] The process is basically the same as Example 1, except that step S2 is omitted when preparing the bio-based membrane.

[0100] Specifically, the preparation method of the bio-based membrane is as follows:

[0101] S1. Dissolve bio-based PU and PDMS in a first mixed solvent of DMF and TMF (DMF, TMF mass ratio 1:1) in a mass ratio of 2:1 to prepare a first spinning solution, and the mass fraction of bio-based PU and PDMS in the mixed solvent is 20%; then use electrospinning (extrusion rate 0.5 mL / h, drum speed 800 r / min, voltage 15 kV, receiving distance 15 cm) to prepare the first spinning solution into a PU / PDMS membrane.

[0102] S2. Dissolve the bio-based PU and PDMS in a second mixed solvent of DMF and TMF (DMF, TMF mass ratio 1:1) in a mass ratio of 2:1 to prepare a second spinning solution, and the mass fraction of bio-based PU and PDMS in the mixed solvent is 10%; then use electrostatic spraying (extrusion rate 0.5 mL / h, drum speed 800 r / min, voltage 15 kV, receiving distance 15 cm) to spray the second spinning solution onto one side of the PU / PDMS membrane, and then dry it in a vacuum drying oven at 50°C for 6 hours.

[0103] S3. After dispersing PDMS, γ-glycidyloxypropyltrimethoxysilane and polyallylamine hydrochloride in n-heptane at a mass ratio of 25:3:1, the mass fraction of PDMS, γ-glycidyloxypropyltrimethoxysilane and polyallylamine hydrochloride in n-heptane is 45%, dibutyltin dilaurate (mass is 3% of the amount of PDMS added) is added dropwise, stirred for 2 hours and then allowed to stand for degassing to obtain a film-forming solution; polyhexamethyleneguanidine hydrochloride (mass ratio to PDMS is 1:25) is dissolved in ethanol to obtain a coating solution.

[0104] S4. First, spray the membrane-forming liquid onto one side of the PU / PDMS membrane, and expose it to the sun at room temperature to form a membrane layer. Then, dip-coat the coating liquid onto the surface of the membrane layer, and dry it in a vacuum drying oven at 80° C. for 8 h to obtain the bio-based membrane.

[0105] A method for preparing a bio-based nylon three-layer jacket fabric comprises the following steps:

[0106] Using fine-denier bio-based PA56 low-stretch yarn 20D / 24F DTY FD, the network points are increased from the conventional 17-20 to about 28, an increase of about 40%. This not only ensures the stretch style of DTY, but also enhances the bonding between its monofilaments, optimizes its spinning technology, and is conducive to improving weaving efficiency.

[0107] In weaving, PA56 20D / 24F DTY FD of the same specification is used, and two roots are threaded through the same heald to form the warp grid lines. In the weft direction, two roots of PA56 20D / 24F DTY FD are used and sprayed to form the weft grid lines. A fine square checkered texture is formed on the overall surface of the fabric. The size of the warp and weft checkered patterns is 1mm*1mm, which ensures the weaving stability of the fabric and increases the fabric recognition.

[0108] The warp and weft density used is 240 / int in the warp direction and 204t / int in the weft direction. The woven weight is 49g / m 2 The woven texture is plain weave. The woven appearance can vary in size and checkered texture, depending on the texture design.

[0109] The prepared warp beam is threaded through the heddle and reed, then brought to the loom. The weft yarn is prepared and weaving is done using a water jet loom. The workshop temperature and humidity are required to be 20-25°C and 65%±5% respectively. The loom speed is set to 530r / min and the upper tension is 1500N.

[0110] Dyeing, finishing and shaping: After the grey cloth is completed, the fabric will be pre-shrunk in open width - cold piled - pre-shaped - overflow dyeing - drying - waterproofing treatment - high temperature shaping - out of the vat.

[0111] The waterproofing treatment uses a fluorine-free water repellent, Barrier ECO-DRY, at a 4% concentration, and a crosslinker, Effect PAX, at a 0.8% concentration. The setting machine is set at a speed of 20 m / min, a temperature of 170°C, and a high-temperature setting time of 60 seconds. This high-temperature setting time must be maintained at approximately 60 seconds to allow the fluorine-free water repellent to more firmly bond with the fabric and form a reinforced crosslink at high temperatures, ensuring a waterproofing effect.

[0112] Select bio-based membrane for lamination, and the uncoated side of the bio-based membrane is bonded to the inner surface of the face fabric. After lamination, the glue is completely cured and bonded under constant temperature and humidity for 24 hours, and then the third layer of base fabric 10D recycled nylon is laminated. After lamination, it is bonded in the same way as the middle layer of bio-based membrane, and then cured and bonded under constant temperature and humidity for 24 hours.

[0113] After gluing is completed, the edges and corners are trimmed to obtain the bio-based nylon three-layer jacket fabric.

[0114] The pore size was analyzed using a desktop scanning electron microscope (SEM, JSM-IT300, JEOL Ltd.). The pore size distribution of the membranes in Example 1 and Comparative Examples 1-4 was between 0.2 and 0.8 μm. The performance of the bio-based membranes obtained in Example 1 and Comparative Examples 1-4 was tested under standard conditions. The hydrostatic pressure test standard was GB / T 4744-2013 "Testing and evaluating the waterproof performance of textiles - Hydrostatic pressure method"; the water vapor permeability flux test standard was GB / T 32614-2016 "Outdoor sportswear jackets"; and the contact angle was measured using a contact angle goniometer DSA100 to measure the water contact angle (WCA) of the fiber membrane (the water contact angle was tested on the side of the bio-based membrane that was bonded to the interior).

[0115] The test results are shown in Table 1.

[0116] Table 1 Test results

[0117] Test items Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Contact angle / ° 166.6 163.5 164.2 164.1 138.5 Hydrostatic pressure / KPa 110 101 108 107 95 <![CDATA[Water vapor permeability / kg / m 2 / d]]> 8.57 8.21 6.75 6.34 8.62 Contact angle after 50 wear cycles / ° 161.5 159.7 160.3 159.5 112.7 Hydrostatic pressure after 30 washes / KPa 107 90 104 102 88 <![CDATA[Water vapor permeability after 30 washes / kg / m 2 / d]]> 8.32 7.54 6.41 6.15 8.37

[0118] As can be seen from Table 1, the bio-based membrane provided by the present invention has a large surface water contact angle, high hydrostatic pressure, and good moisture permeability, indicating that it has excellent waterproof and moisture permeability. After abrasion cycles and water washing, the advantages of a large surface water contact angle, high hydrostatic pressure, and good moisture permeability are still retained, so that the bio-based membrane can improve the waterproof and moisture permeability and water washability of the fabric after being used as an intermediate layer of the fabric.

[0119] As can be seen from Table 1, when γ-glycidyloxypropyltrimethoxysilane is not added (Comparative Example 1), the hydrostatic pressure test and moisture permeability test data of the obtained bio-based membrane after water washing show a significant decrease, while the corresponding results in Example 1 and Comparative Examples 2-4 show a smaller decrease, indicating that the PDMS cross-linked and modified by γ-glycidyloxypropyltrimethoxysilane is better bonded to the bio-based membrane, and the polyallylamine hydrochloride and polyhexamethyleneguanidine hydrochloride grafted on γ-glycidyloxypropyltrimethoxysilane are not easily washed off, thereby maintaining excellent waterproof and moisture permeability.

[0120] It can be further found that when polyallylamine hydrochloride (Comparative Example 2) or polyhexamethyleneguanidine hydrochloride (Comparative Example 3) is not added, the moisture permeability of the bio-based membrane is relatively poor, while the moisture permeability of the bio-based membrane with the addition of polyallylamine hydrochloride and polyhexamethyleneguanidine hydrochloride (Example 1, Comparative Examples 1 and 4) is better. The reason is that the hydrophilicity of polyhexamethyleneguanidine hydrochloride can absorb water vapor, and the amine hydrochloride groups carried by the polyallylamine hydrochloride dispersed in the membrane layer can promote the mass transfer rate of water molecules through the action of ions and dipoles of water molecules, so that water vapor can be discharged faster, thereby showing better moisture permeability.

[0121] The above is only a preferred embodiment of the patent of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the patent of the present invention. These improvements and modifications should also be regarded as the scope of protection of the patent of the present invention.

Claims

1. A bio-based nylon three-layer patch fabric, characterized in that: The invention comprises a bio-based nylon face fabric, a bio-based membrane and a base fabric bonded in sequence, wherein the bio-based membrane contains bio-based PU and PDMS, and the mass ratio of the bio-based PU to the PDMS is (1-3):1; Bio-based PU / PDMS microspheres are deposited on one side of the bio-based membrane bonded to the bio-based nylon face cloth, wherein the mass ratio of bio-based PU to PDMS in the bio-based PU / PDMS microspheres is (1-5):1; A PDMS film layer modified by cross-linking with an organic silane is deposited on one side of the bio-based membrane bonded to the base fabric, polyallylamine hydrochloride is doped in the PDMS film layer, and polyhexamethyleneguanidine hydrochloride is grafted on the surface of the PDMS film layer; in the PDMS film layer, the mass ratio of PDMS, organic silane, polyallylamine hydrochloride and polyhexamethyleneguanidine hydrochloride is (20-30):(1-4):(1-2):(1-2); and the organic silane is γ-glycidyloxypropyltrimethoxysilane.

2. The bio-based nylon three-layer pasting fabric according to claim 1, characterized in that: The yarn of the bio-based nylon face fabric is: bio-based PA56 yarn, 20D / 24F DTY FD, 26-40 mesh points; The base fabric is nylon cot fabric.

3. The bio-based nylon three-layer pasting fabric according to claim 1, characterized in that: The preparation method of the bio-based membrane is: S1, dissolving bio-based PU and PDMS in a first mixed solvent of DMF and TMF to prepare a first spinning solution, and then forming the first spinning solution into a PU / PDMS membrane by electrospinning; S2, dissolving the bio-based PU and PDMS in a second mixed solvent of DMF and TMF to prepare a second spinning solution, and then spraying the second spinning solution onto one side of the PU / PDMS membrane by electrostatic spraying, followed by vacuum drying; S3, dispersing PDMS, organosilane, and polyallylamine hydrochloride in n-heptane, then dropwise adding dibutyltin dilaurate, stirring, and then standing for degassing to obtain a film-forming solution; dissolving polyhexamethyleneguanidine hydrochloride in ethanol to obtain a coating solution; S4. First, spray the membrane-forming liquid onto the other side of the PU / PDMS membrane to form a membrane layer after deposition, then dip-coat the coating liquid onto the surface of the membrane layer, and vacuum dry to obtain the bio-based membrane.

4. The bio-based nylon three-layer pasting fabric according to claim 3, characterized in that: In step S1, in the first mixed solvent, the mass ratio of DMF to TMF is (1-2):1, and the mass fraction of bio-based PU and PDMS in the mixed solvent is 20-25%.

5. The bio-based nylon three-layer pasting fabric according to claim 3, characterized in that: In step S2, in the second mixed solvent, the mass ratio of DMF to TMF is (1-2):1, and the mass fraction of bio-based PU and PDMS in the mixed solvent is 8-15%.

6. The bio-based nylon three-layer pasting fabric according to claim 3, characterized in that: In step S2, the vacuum drying conditions are: 50-60° C., 5-8 h.

7. The bio-based nylon three-layer pasting fabric according to claim 3, characterized in that: In step S3, the concentration of the PDMS, organosilane and polyallylamine hydrochloride in n-heptane is 20-30%, and the amount of dibutyltin dilaurate added is 2-5% of the mass of PDMS.

8. The bio-based nylon three-layer pasting fabric according to claim 3, characterized in that: In step S3, the vacuum drying conditions are: 50-80° C., 6-10 h.

9. The method for preparing the bio-based nylon three-layer pasting fabric according to any one of claims 1 to 8, characterized in that: Specifically, the bio-based nylon surface fabric is first woven and dyed, finished, waterproofed and shaped; the bio-based nylon surface fabric is then bonded to the bio-based film and then bonded to the third layer of base fabric; and finally the edges are trimmed and finished to obtain the fabric.

10. Use of the bio-based nylon three-layer patch fabric according to any one of claims 1 to 8 in the preparation of a jacket.