Nylon high hydrostatic pressure coating fabric and preparation method thereof

Abstract

The invention discloses a nylon high hydrostatic pressure coating fabric and a preparation method thereof, and belongs to the technical field of fabric preparation. The preparation method comprises the following steps: (1) turning grey cloth, boiling off, mercerizing, shaping, dyeing the bottom and printing; (2) drying and baking after printing, and then carrying out ageing and drying treatment; (3) soaping, color fixing and waterproof treatment are carried out after treatment in the step (2); (4) carrying out high-temperature and high-pressure double-rolling-point twice calendaring treatment on the material treated in the step (3); and (5) after the treatment in the step (4), carrying out reverse side gluing under a stepped baking temperature condition. The waterproof treatment is firstly carried out, then the back face calendaring treatment is carried out, air-jet texturing yarns of the fabric are fully rolled to be flat, gaps among fibers are closed, finally, coating finishing is carried out on the back face, the gaps among the fibers are completely closed, and therefore the high hydrostatic pressure is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of fabric preparation, and particularly relates to a nylon high hydrostatic pressure coated fabric and a preparation method thereof. Background Art

[0002] Coating is to cover a layer of polymer on the fabric to form a composite of fabric and polymer. This composite not only has the original function of the fabric, but also adds the function of the covering layer. The purpose of coating is to enhance the use value and added value of the fabric, create more styles and functional fabrics for the textile industry, broaden the use of textiles, and meet the requirements of fashion, individuality and novelty in the modern clothing industry.

[0003] Water Proofness (abbreviated as WP): The outdoor fabric industry usually calls it water resistance, and the unit is mmh 2 O or KPa, refers to the water pressure strength per unit area. Under standard laboratory conditions, the fabric withstands the pressure of distilled water spraying upwards, and the maximum water pressure is recorded, such as water pressure resistance of 5000mmh 2 O, that is, the unit area can withstand a maximum pressure of 5m without leakage. When nylon fabrics have hydrostatic pressure requirements, they can generally reach 1000-3000mmh 2 O, with the increasingly fierce market competition, the requirements for hydrostatic pressure are getting higher and higher, often requiring 3000-5000mmh 2 O, even up to 10000mmh 2 O, 15000mmh 2 O.

[0004] Coating technology is an important means in fabric finishing. In the existing technology, there are many ways of high hydrostatic pressure coating, such as multi-knife coating, glue stacking, etc. However, due to the characteristics of nylon fabric itself, such as poor water absorption, good self-lubrication and low friction coefficient, it is easy to have low adhesion when setting waterproof coating on it. At the same time, it will also cause rubber particles and rubber strips on the fabric surface due to multi-knife coating, and the fabric surface is rough, and the process flow is extremely complicated. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the present invention provides a nylon high hydrostatic pressure coated fabric and a preparation method thereof, which can effectively improve the hydrostatic pressure of nylon fabric.

[0006] To achieve the above purpose, the technical solution adopted by the present invention to solve the technical problem is:

[0007] One of the purposes of the present invention is to provide a method for preparing a nylon high hydrostatic pressure coated fabric, comprising the following steps:

[0008] (1) Turning, scouring, mercerizing, shaping, dyeing and printing of grey cloth;

[0009] (2) After printing, it is dried and baked, and then steamed and dried;

[0010] (3) after the treatment in step (2), soap washing, color fixing and waterproofing are performed;

[0011] (4) subjecting the material treated in step (3) to a high temperature and high pressure double-point calendering treatment;

[0012] (5) After being processed in step (4), the back side is coated with glue under a stepped baking temperature condition.

[0013] Furthermore, in step (1), the scouring is performed by five immersions and five paddings, followed by steaming; the auxiliary agents of the padding solution include a refining and desizing agent SCOUTEX AWR with a concentration of 4-8 g / L; a refining agent JG-130 with a concentration of 3-5 g / L, caustic soda with a concentration of 8-12 g / L, and a multifunctional finishing agent Hydroperm DH new liq with a concentration of 18-22 g / L; the steaming speed is 50-60 m / min, the temperature is 95-97° C., and the liquid carrying rate of the padding solution is 50-70%.

[0014] Furthermore, in step (1), the concentration of caustic soda used in mercerizing is 200-250 g / L, the vehicle speed is 50-60 m / min, and the steamer temperature is 96-98°C.

[0015] Furthermore, during shaping, a machine speed of 50 m / min was used, the temperature was 140-150°C, the expansion width was maintained at 157 cm, the cloth drop width reached 155 cm, and the overfeed speed difference was 0 m / min.

[0016] Furthermore, in step (1), an acid dye and an anti-migration agent ST-200A are used to prepare a dye liquor for bottom dyeing treatment, wherein the acid dyes and the addition amounts in the dye liquor are: acid yellow FS-G: 6.75 g / L, acid red S-2B: 0.58 g / L, acid blue SR: 3.2 g / L, and the addition amount of the anti-migration agent ST-200A is 8 to 12 g / L. The specific process is: the shaped grey cloth is sequentially subjected to padding dye liquor, pre-baking, and drying operations, the liquid carrying rate after padding dye liquor is 45 to 60%, the pre-baking temperature is 100 to 120° C., and the drying temperature is 120 to 140° C.

[0017] Furthermore, in step (1), a printing paste mixed with a printing acid paste and an acid dye is used for printing, and a total of 3 sets of colors are printed. The printing paste DM5261 of the first set of colors is added in an amount of 6.5%, and the acid dyes and the addition amounts are: acid black LD: 3.6%, acid yellow S-RL: 2.1%, and acid red S-2B: 0.2%. The printing paste DM5261 of the second set of colors is added in an amount of 3.8%, and the acid dyes and the addition amounts are: acid yellow S-RL: 1.55%, acid red S-2B: 0.56%, and acid blue SR: 0.15%. The printing paste DM5261 of the third set of colors is added in an amount of 4.2%, and the acid dyes and the addition amounts are: acid yellow S-RL: 1.9%, acid red S-2B: 0.08%, and acid blue SR: 0.33%. The viscosity of the printing slurry is controlled at 40dPa·s, the magnetic force of the scraper on the printing machine is 50Kpa, and the machine speed is 50-60m / min.

[0018] Furthermore, the drying conditions in step (2) are: vehicle speed of 60 m / min and temperature of 120-130°C.

[0019] The beneficial effects of adopting the above technical solution are:

[0020] Through the operation of the above process, the preliminary treatment of nylon fabric can be effectively strengthened, providing a good foundation for the subsequent color fixing treatment and waterproof finishing as well as reverse calendering and gluing operations.

[0021] Furthermore, in step (3), soaping agent NS-405 is used for soaping, the soaping temperature is 70-80°C, and the vehicle speed is 60m / min; color fixing agent PA-66 is used for color fixing, the color fixing temperature is 70-80°C, and the vehicle speed is 60m / min.

[0022] Furthermore, the waterproofing process in step (3) is as follows:

[0023] The method comprises the following steps: impregnating with a waterproof finishing liquid, and then baking and stretching; wherein the waterproof finishing liquid comprises a waterproofing agent with a concentration of 30 to 40 g / L and a pH neutralizing agent with a concentration of 1 to 5 g / L; the vehicle speed during drying and stretching is 70 to 90 m / min, and the temperature during drying and stretching is 160 to 180°C.

[0024] Furthermore, the waterproofing agent is waterproofing agent 6040N.

[0025] Further, the pH neutralizer is NaOH and / or HCl.

[0026] Furthermore, the processing conditions for the high temperature and high pressure double-nip calendering treatment in step (4) are:

[0027] The temperature is set at 150-180°C, and the upper and lower nip points are calendered synchronously, i.e., double nip point calendering, wherein the upper nip point pressure is 7-9KPa, the lower nip point pressure is 8-10KPa, and the vehicle speed is 10-20m / min. The above calendering process is repeated once.

[0028] Furthermore, the specific process of back-side gluing under the step-by-step baking temperature condition in step (5) is as follows:

[0029] The scraper gluing process is adopted, and the gluing is carried out under the conditions of a vehicle speed of 20-30 m / min and step baking temperatures of 100-110° C., 120-130° C., and 140-150° C. respectively.

[0030] Furthermore, the scraper specification is 2mm, the distance between the scraper and the roller is 6mm, and the downward pressure distance of the scraper mouth is 2mm; polyurethane oily glue JYT-4355 + melamine type bridging agent SA-55 + melamine resin accelerator SA-10 are selected, and finally toluene is used to adjust the viscosity so that the viscosity is controlled at 20000-23000mpa.s.

[0031] The beneficial effects of adopting the above technical solution are:

[0032] The present invention first performs waterproofing treatment, then performs back calendering treatment, fully flattens the air-changing fibers of the fabric, closes the gaps between the fibers, and finally performs coating treatment on the back to completely close the gaps between the fibers, thereby achieving a higher hydrostatic pressure. Moreover, through the above-mentioned calendering treatment and optimization of the glue coating process, not only the hydrostatic pressure performance of the fabric is greatly improved, but also the adhesion firmness between the fabric and the oily PU film can be effectively increased, thereby improving the durability.

[0033] The present invention provides a method that can significantly and effectively improve the hydrostatic pressure of nylon fabrics, that is, a high-temperature and high-pressure double-rolling point double-calendering method is used to fully flatten the air-changing yarns on the surface of the fabric, and then the polyurethane oily PU is evenly coated on the calendered surface of the fabric through a stepped medium-low temperature baking temperature. The present invention can easily reach a hydrostatic pressure of 20,000 mmh by multiple optimization of coating glue, calendering and baking process conditions. 2 O.

[0034] The second object of the present invention is to provide a nylon high hydrostatic pressure coated fabric prepared by the above method.

[0035] Beneficial effects of the present invention:

[0036] The product of the present invention has the functions of waterproof, rainproof, high hydrostatic pressure, etc., and is a high-tech product involving polymer material science. The quality of the product of the present invention meets the military camouflage fabric standards provided by the United Kingdom, the United States, Europe and other countries and the EU Oeko-Tex100 standard and ISO series standards. The development of the present invention will definitely further improve the innovation ability of enterprises and enhance the core competitiveness of enterprises; it will play a role in promoting the structural adjustment of textile printing and dyeing enterprise products and the textile industry technology of our province; it is more conducive to improving the manufacturing technology level of our country's military equipment. DETAILED DESCRIPTION

[0037] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0038] Example 1

[0039] A method for preparing nylon high hydrostatic pressure coated fabric, the process flow of which is: grey cloth → turning cloth → scouring → mercerizing → shaping → base dyeing → printing → baking → steaming → soaping → color fixing treatment → waterproof stentering → calendering → reverse side gluing stentering → inspection → finished product. The specific process is as follows:

[0040] (1) Scouring: First, the treatment is carried out by five immersions and five paddings, and then steaming. The additives of the padding solution include 4 g / L refining and desizing agent SCOUTEX AWR, 3 g / L refining agent JG-130, 8 g / L caustic soda, and 18 g / L multifunctional finishing agent Hydroperm DH new liq. The steaming speed is 60 m / min, the temperature is 97 ° C, and the liquid rate of the padding solution is 70%.

[0041] (2) Mercerizing: The caustic soda concentration used is 250g / L, the machine speed is 60m / min, and the steamer temperature is 98℃.

[0042] (3) Shaping: The machine speed is 50 m / min, the temperature is 150 °C, the expansion width is maintained at 157 cm, the cloth width reaches 155 cm, and the overfeed speed difference is 0 m / min.

[0043] (4) Dyeing: Acid dye and anti-migration agent are used to make dyeing solution for dyeing, and the amount of anti-migration agent added in the dyeing solution is 8-12 g / L; the acid dyes and the amount of acid dye added in the dyeing solution are: acid yellow FS-G: 6.75 g / L, acid red S-2B: 0.58 g / L, acid blue SR: 3.2 g / L, and the amount of anti-migration agent ST-200A is 8-12 g / L. The shaped grey cloth is sequentially dipped in dyeing solution, pre-dried, and dried. The liquid rate after dipping in dyeing solution is 45-60%, the pre-dried temperature is 120°C, and the drying temperature is 140°C.

[0044] (5) Printing: Printing was performed using a printing paste mixed with a printing acid paste and an acid dye, with a total of 3 sets of colors printed. The amount of printing paste DM5261 added to the first set of colors was 6.5%, and the acid dyes and their addition amounts were: acid black LD: 3.6%, acid yellow S-RL: 2.1%, and acid red S-2B: 0.2%. The amount of printing paste DM5261 added to the second set of colors was 3.8%, and the acid dyes and their addition amounts were: acid yellow S-RL: 1.55%, acid red S-2B: 0.56%, and acid blue SR: 0.15%. The amount of printing paste DM5261 added to the third set of colors was 4.2%, and the acid dyes and their addition amounts were: acid yellow S-RL: 1.9%, acid red S-2B: 0.08%, and acid blue SR: 0.33%. The viscosity of the printing slurry is controlled at 40dPa·s, the magnetic force of the scraper on the printing machine is 50Kpa, and the machine speed is 50-60m / min.

[0045] (6) Drying: speed 60 m / min, temperature 130 °C.

[0046] (7) Baking: the vehicle speed is 50 m / min and the baking temperature is 160°C.

[0047] (8) Steaming and drying: During steaming, the vehicle speed is 15 m / min and the temperature is 103°C; after steaming, it is dried at 120°C.

[0048] (9) Soap washing: soap washing was performed using soap washing agent NS-405, with a dosage of 3.0 g / L, a soap washing temperature of 80°C, and a vehicle speed of 60 m / min.

[0049] (10) Color fixation: Use color fixative PA-66 at a dosage of 4 g / L, a color fixation temperature of 80°C, and a vehicle speed of 60 m / min.

[0050] (11) Waterproof tentering: firstly, dip into the waterproof finishing liquid, and then bake the tentering. The proportion of the waterproof finishing liquid is: waterproofing agent 6040N: 40g / L + pH neutralizer: 2g / L. The pH of the waterproof finishing liquid is adjusted to 6-7 by the pH neutralizer. The pH neutralizer includes NaOH and / or HCl. The vehicle speed during drying the tentering is 70-90m / min, and the temperature during drying the tentering is 160-180℃.

[0051] (12) Calendering: Calendering conditions are: temperature is set at 180°C, upper and lower nip points are calendered simultaneously, i.e. double nip calendering, where the upper nip pressure is 7-9 KPa, the lower nip pressure is 8-10 KPa, and the vehicle speed is 20 m / min. The above calendering process is repeated once.

[0052] (13) Gluing: A coating scraper is used for gluing. The glue used is the oil-based glue JYT-4355 of Zhejiang Jianyang Group, and is used in combination with melamine-type bridging agent SA-55 + melamine resin accelerator SA-10. The glue viscosity during gluing is 20000-23000mpa.s, the step temperature setting is 1-2# oven: 110℃, 3-4# oven: 130℃, 5-9# oven: 150℃, and the vehicle speed is 20m / min; the scraper specification is 2mm, the distance between the scraper and the roller is 6mm, the scraper mouth downward pressure distance is 2mm, and the tension pressure is 15-25Kpa.

[0053] (14) Finally, Dandong Star’s water-based PU DM-5171 topcoat was used to solve the problem of stickiness on the coating surface.

[0054] Example 2

[0055] The difference between this embodiment and embodiment 1 is that the calendering process in step (12) of this embodiment is changed to a single calendering point, and the specific settings are as follows:

[0056] The calendering conditions are: temperature 180°C, pressure 9KPa, single calendering point, two calendering processes, and vehicle speed 20m / min.

[0057] Example 3

[0058] The difference between this embodiment and embodiment 1 is that in step (13) of this embodiment, the manufacturer of the oil-based glue is changed, and the specific settings are as follows:

[0059] In this embodiment, Chengdu Demei oil-based glue DM-5500B + bridging agent 897 + accelerator 899 is used for glue coating, and finally toluene is used to adjust the viscosity, so that the viscosity is controlled at 20000-23000mpa.s.

[0060] Example 4

[0061] The difference between this embodiment and embodiment 1 is that the temperature in step (13) of this embodiment is set to the same temperature, which is specifically set as follows: the temperature is set to oven #1-9: 170°C.

[0062] Example 5

[0063] The difference between this embodiment and embodiment 1 is that in step (13) of this embodiment, the vehicle speed is increased, and the specific settings are as follows:

[0064] The parameters of the coating scraper are: scraper thickness 2mm, blade distance 6mm, downward pressure distance 2mm, cloth feeding tension pressure 15-25Kpa, and vehicle speed 40m / min.

[0065] Example 6

[0066] A method for preparing nylon high hydrostatic pressure coated fabric, the process flow of which is: grey cloth → turning cloth → scouring → mercerizing → shaping → base dyeing → printing → baking → steaming → soaping → color fixing treatment → waterproof stentering → calendering → reverse side gluing stentering → inspection → finished product. The specific process is as follows:

[0067] (1) Scouring: First, the treatment is carried out by five immersions and five paddings, and then steaming is performed; the additives of the padding solution include 8 g / L of a refining and desizing agent SCOUTEX AWR, 5 g / L of a refining agent JG-130, 12 g / L of caustic soda, and 22 g / L of a multifunctional finishing agent Hydroperm DH new liq; the steaming speed is 60 m / min, the temperature is 97 ° C, and the liquid rate of the padding solution is 70%.

[0068] (2) Mercerizing: The caustic soda concentration used is 200 g / L, the machine speed is 50 m / min, and the steamer temperature is 96 °C.

[0069] (3) Shaping: The machine speed is 50 m / min, the temperature is 140 °C, the expansion width is maintained at 157 cm, the cloth width reaches 155 cm, and the overfeed speed difference is 0 m / min.

[0070] (4) Dyeing: Acid dye and anti-migration agent are used to make dyeing solution for dyeing, and the amount of anti-migration agent added in the dyeing solution is 8g / L; the acid dyes and the amount of acid dye added in the dyeing solution are: acid yellow FS-G: 6.75g / L, acid red S-2B: 0.58g / L, acid blue SR: 3.2g / L, and the amount of anti-migration agent ST-200A added is 12g / L. The shaped grey cloth is sequentially dipped in dyeing solution, pre-dried, and dried. The liquid rate after dipping in dyeing solution is 45-60%, the pre-dried temperature is 120°C, and the drying temperature is 140°C.

[0071] (5) Printing: Printing was performed using a printing paste mixed with a printing acid paste and an acid dye, with a total of 3 sets of colors printed. The amount of printing paste DM5261 added to the first set of colors was 6.5%, and the acid dyes and their addition amounts were: acid black LD: 3.6%, acid yellow S-RL: 2.1%, and acid red S-2B: 0.2%. The amount of printing paste DM5261 added to the second set of colors was 3.8%, and the acid dyes and their addition amounts were: acid yellow S-RL: 1.55%, acid red S-2B: 0.56%, and acid blue SR: 0.15%. The amount of printing paste DM5261 added to the third set of colors was 4.2%, and the acid dyes and their addition amounts were: acid yellow S-RL: 1.9%, acid red S-2B: 0.08%, and acid blue SR: 0.33%. The viscosity of the printing slurry is controlled at 40dPa·s, the magnetic force of the scraper on the printing machine is 50Kpa, and the machine speed is 50-60m / min.

[0072] (6) Drying: speed 60 m / min, temperature 120°C.

[0073] (7) Baking: the vehicle speed is 50 m / min and the baking temperature is 160°C.

[0074] (8) Steaming and drying: During steaming, the vehicle speed is 15-18 m / min and the temperature is 101°C; after steaming, it is dried at 110-120°C.

[0075] (9) Soap washing: soap washing was performed using soap washing agent NS-405, with a dosage of 3.0 g / L, a soap washing temperature of 80°C, and a vehicle speed of 60 m / min.

[0076] (10) Color fixation: Use color fixative PA-66 at a dosage of 4 g / L, a color fixation temperature of 80°C, and a vehicle speed of 60 m / min.

[0077] (11) Waterproof tentering: firstly, the waterproof finishing liquid is dipped and then the tentering is baked. The proportion of the waterproof finishing liquid is: waterproofing agent 6040N: 40g / L + pH neutralizer: 2g / L. The pH of the waterproof finishing liquid is adjusted to 6-7 by the pH neutralizer. The pH neutralizer includes NaOH and / or HCl. The vehicle speed during drying the tentering is 70-90m / min, and the temperature during drying the tentering is 160℃.

[0078] (12) Calendering: Calendering conditions are: temperature is set at 180°C, upper and lower nip points are calendered synchronously, i.e. double nip point calendering, wherein the upper nip point pressure is 7-9 KPa, the lower nip point pressure is 8-10 KPa, and the vehicle speed is 10-20 m / min. The above calendering process is repeated once.

[0079] (13) Gluing: A coating scraper is used for gluing. The glue used is the oil-based glue JYT-4355 of Zhejiang Jianyang Group, and is used in combination with melamine-type bridging agent SA-55 + melamine resin accelerator SA-10. The glue viscosity during gluing is 20000-23000mpa.s, the step temperature setting is 1-2# oven: 110℃, 3-4# oven: 130℃, 5-9# oven: 150℃, and the vehicle speed is 20m / min; the scraper specification is 2mm, the distance between the scraper and the roller is 6mm, the scraper mouth downward pressure distance is 2mm, and the tension pressure is 15-25Kpa.

[0080] (14) Finally, Dandong Star’s water-based PU DM-5171 topcoat was used to solve the problem of stickiness on the coating surface.

[0081] Example 7

[0082] A method for preparing nylon high hydrostatic pressure coated fabric, the process flow of which is: grey cloth → turning cloth → scouring → mercerizing → shaping → base dyeing → printing → baking → steaming → soaping → color fixing treatment → waterproof stentering → calendering → reverse side gluing stentering → inspection → finished product. The specific process is as follows:

[0083] (1) Scouring: First, the steel was treated by five dips and five rolls, and then steaming was performed. The additives in the padding solution included 6 g / L of a refining and desizing agent SCOUTEX AWR, 3 g / L of a refining agent JG-130, 10 g / L of caustic soda, and 19 g / L of a multifunctional finishing agent Hydroperm DH new liq. The steaming speed was 50 m / min, the temperature was 97 °C, and the liquid rate of the padding solution was 50%.

[0084] (2) Mercerizing: The caustic soda concentration used is 220 g / L, the machine speed is 60 m / min, and the steamer temperature is 98 °C.

[0085] (3) Shaping: The machine speed is 50 m / min, the temperature is 150 °C, the expansion width is maintained at 157 cm, the cloth width reaches 155 cm, and the overfeed speed difference is 0 m / min.

[0086] (4) Dyeing: Acid dye and anti-migration agent are used to make dyeing solution for dyeing, and the amount of anti-migration agent added in the dyeing solution is 12g / L; the acid dyes and the amount of acid dye added in the dyeing solution are: acid yellow FS-G: 6.75g / L, acid red S-2B: 0.58g / L, acid blue SR: 3.2g / L, and the amount of anti-migration agent ST-200A added is 12g / L. The shaped grey cloth is sequentially dipped in dyeing solution, pre-dried, and dried. The liquid carrying rate after dipping in dyeing solution is 45-60%, the pre-dried temperature is 120℃, and the drying temperature is 120℃.

[0087] (5) Printing: Printing was performed using a printing paste mixed with a printing acid paste and an acid dye, with a total of 3 sets of colors printed. The amount of printing paste DM5261 added to the first set of colors was 6.5%, and the acid dyes and their addition amounts were: acid black LD: 3.6%, acid yellow S-RL: 2.1%, and acid red S-2B: 0.2%. The amount of printing paste DM5261 added to the second set of colors was 3.8%, and the acid dyes and their addition amounts were: acid yellow S-RL: 1.55%, acid red S-2B: 0.56%, and acid blue SR: 0.15%. The amount of printing paste DM5261 added to the third set of colors was 4.2%, and the acid dyes and their addition amounts were: acid yellow S-RL: 1.9%, acid red S-2B: 0.08%, and acid blue SR: 0.33%. The viscosity of the printing slurry is controlled at 40dPa·s, the magnetic force of the scraper on the printing machine is 50Kpa, and the machine speed is 50-60m / min.

[0088] (6) Drying: speed 60 m / min, temperature 130 °C.

[0089] (7) Baking: the vehicle speed is 50 m / min and the baking temperature is 160°C.

[0090] (8) Steaming and drying: During steaming, the vehicle speed is 15-18 m / min and the temperature is 101°C; after steaming, it is dried at 110°C.

[0091] (9) Soap washing: soap washing was performed using soap washing agent NS-405, with a dosage of 3.0 g / L, a soap washing temperature of 80°C, and a vehicle speed of 60 m / min.

[0092] (10) Color fixation: The color fixation agent PA-66 was used at a dosage of 4 g / L, a color fixation temperature of 80°C, and a vehicle speed of 60 m / min.

[0093] (11) Waterproof tentering: firstly, the waterproof finishing liquid is dipped and then the tentering is baked. The proportion of the waterproof finishing liquid is: waterproofing agent 6040N: 40g / L + pH neutralizer: 2g / L. The pH of the waterproof finishing liquid is adjusted to 6-7 by the pH neutralizer. The pH neutralizer includes NaOH and / or HCl. The vehicle speed during drying the tentering is 70-90m / min, and the temperature during drying the tentering is 160℃.

[0094] (12) Calendering: Calendering conditions are: temperature is set at 180°C, upper and lower nip points are calendered synchronously, i.e. double nip point calendering, wherein the upper nip point pressure is 7-9 KPa, the lower nip point pressure is 8-10 KPa, and the vehicle speed is 10-20 m / min. The above calendering process is repeated once.

[0095] (13) Gluing: A coating scraper is used for gluing. The glue used is the oil-based glue JYT-4355 of Zhejiang Jianyang Group, and is used in combination with melamine-type bridging agent SA-55 + melamine resin accelerator SA-10. The glue viscosity during gluing is 20000-23000mpa.s, the step temperature setting is 1-2# oven: 110℃, 3-4# oven: 130℃, 5-9# oven: 150℃, and the vehicle speed is 20m / min; the scraper specification is 2mm, the distance between the scraper and the roller is 6mm, the scraper mouth downward pressure distance is 2mm, and the tension pressure is 15-25Kpa.

[0096] (14) Finally, Dandong Star’s water-based PU DM-5171 topcoat was used to solve the problem of stickiness on the coating surface.

[0097] The finished products prepared in Examples 1 to 5 were tested, and the test results are shown in Table 1.

[0098] Table 1 Product performance index test data

[0099]

[0100] The present invention improves the calendering process conditions and optimizes the coating process points, including the step-by-step baking temperature, the selection of high-quality glue, the optimization of the scraper and the blade distance, and the final confirmation of the vehicle speed, so as to fully flatten the air-deformed yarns in the nylon fabric, not only making the hydrostatic pressure reach 20000mmh 2 O, and also ensures that the coating surface is dry and not rough, and is more comfortable.

[0101] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A method for preparing a nylon high hydrostatic pressure coated fabric, characterized in that: The following steps are involved: (1) Turning, scouring, mercerizing, shaping, dyeing and printing of grey cloth; (2) After printing, it is dried and baked, and then steamed and dried; (3) after the treatment in step (2), soap washing, color fixing and waterproofing are performed; (4) subjecting the material treated in step (3) to a high temperature and high pressure double-point calendering treatment; (5) After being processed in step (4), the back side is coated with glue under a stepped baking temperature condition.

2. The preparation method according to claim 1, characterized in that: During the scouring in step (1), the method of five immersions and five rollings is first used, and then steaming is performed; during the scouring in step (1), the method of five immersions and five rollings is used, and then steaming is performed; the auxiliary agents of the padding solution include a refining desizing agent with a concentration of 4-8 g / L, a refining agent with a concentration of 3-5 g / L, a caustic soda with a concentration of 8-12 g / L, and a multifunctional finishing agent with a concentration of 18-22 g / L; The steaming speed is 50-60 m / min, the temperature is 95-97° C., and the liquid rate of the padding liquid is 50-70%.

3. The preparation method according to claim 1, characterized in that: The concentration of caustic soda used in mercerizing in step (1) is 200-250 g / L, the vehicle speed is 50-60 m / min, and the steamer temperature is 96-98° C.

4. The preparation method according to claim 1, characterized in that: In step (1), an acid dye and an anti-migration agent are used to prepare a dye solution for bottom dyeing treatment; the specific process is: the shaped grey cloth is sequentially subjected to padding dye solution, pre-baking and drying operations, the liquid rate after padding dye solution is 45-60%, the pre-baking temperature is 100-120°C, and the drying temperature is 120-140°C.

5. The preparation method according to claim 1, characterized in that: In step (1), printing is performed using a printing paste mixed with a printing acid paste and an acid dye, the viscosity of the printing paste is controlled at 40 dPa·s, the magnetic force of the scraper on the printing machine is 50 KPa, and the machine speed is 50-60 m / min.

6. The preparation method according to claim 1, characterized in that: In step (3), soaping agent NS-405 is used for soaping, the soaping temperature is 70-80° C., and the vehicle speed is 60 m / min; color fixing agent PA-66 is used for color fixing, the color fixing temperature is 70-80° C., and the vehicle speed is 60 m / min.

7. The preparation method according to claim 1, characterized in that: The waterproofing process in step (3) is as follows: The method comprises the following steps: impregnating with a waterproof finishing liquid, and then baking and stretching; wherein the waterproof finishing liquid comprises a waterproofing agent with a concentration of 30 to 40 g / L and a pH neutralizing agent with a concentration of 1 to 5 g / L; the vehicle speed during drying and stretching is 70 to 90 m / min, and the temperature during drying and stretching is 160 to 180°C.

8. The preparation method according to claim 1, characterized in that: The processing conditions of the high temperature and high pressure double-nip calendering treatment in step (4) are: The temperature is 150-180℃, the pressure is 5-10KPa, double rolling points, two calendering processes, and the speed is 10-20m / min.

9. The preparation method according to claim 1, characterized in that: The specific process of back-side gluing under the step-by-step baking temperature condition in step (5) is as follows: The glue coating is carried out by using a scraper gluing process at a vehicle speed of 20-30 m / min and step baking temperatures of 100-110° C., 120-130° C., and 140-150° C.

10. Nylon high hydrostatic pressure coated fabric prepared by the method according to any one of claims 1 to 9.

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