A water-washed low-shrinkage sandwich production process

Abstract

This application relates to the field of warp-knitted spacer fabrics and specifically discloses a process for producing a low-shrinkage sandwich fabric. This process comprises the following steps: using polyester 75D / FDY for the surface and base, and 30D polyester monofilament for the middle, forming a chain weave on the surface to create a diamond-shaped fabric; overfeeding the diamond-shaped fabric, maintaining positive overfeed, and then pre-setting, dyeing, and forming the resulting sandwich fabric. This process has the advantage of reducing the shrinkage of the sandwich fabric from greater than 6% to no more than 3%.

Description

Technical Field

[0001] The present application relates to the field of warp-knitted spacer fabrics, and more particularly, to a process for producing water-washed low-shrinkage sandwich fabrics. Background Art

[0002] Sandwich fabrics consist of three surfaces: top, middle, and bottom. The top surface is typically a mesh design, while the middle surface is made of MOLO yarn connecting the top and bottom surfaces. The bottom surface is typically a densely woven flat surface, commonly known as the "sandwich." Sandwich fabrics are made of high-molecular synthetic fibers woven in a single pass on precision machines. They are durable and are considered a premium quality among warp-knitted fabrics.

[0003] The three-dimensional mesh structure of sandwich fabric makes it known as breathable mesh. Compared with other flat fabrics, sandwich fabric is more breathable and maintains a comfortable and dry surface through air circulation.

[0004] The above sandwich fabrics are usually woven using ordinary polyester yarns, and their structure is unstable during washing, resulting in a large shrinkage rate. Summary of the Invention

[0005] In order to reduce the washing shrinkage of sandwich fabrics, the present application provides a washing low-shrinkage sandwich production process.

[0006] Firstly, the water-washed low-shrinkage sandwich production process adopts the following technical solutions:

[0007] A water-washed low-shrinkage sandwich production process comprises the following steps: selecting polyester 75D / FDY as raw material for the surface and bottom, selecting 30D polyester monofilament as raw material for the middle, making a chain weave on the surface, and weaving into diamond-shaped grey fabric; overfeeding the diamond-shaped grey fabric, maintaining positive overfeed, and then pre-drying, dyeing, and forming to obtain the sandwich fabric.

[0008] By adopting the above technical solution, the chain link structure is added to the front mesh surface, so that the structure of the grey cloth is more stable, and the structure of the sandwich fabric is stable during the washing process, which effectively reduces the washing shrinkage of the polyester three-dimensional spacer fabric, and reduces the washing shrinkage of the polyester three-dimensional spacer fabric from more than 6% to less than 3%, thus overcoming the problem of large washing shrinkage of warp-knitted spacer fabrics using ordinary polyester yarns.

[0009] Preferably, the overfeeding is +5 to +8.

[0010] By adopting the above technical solution, overfeeding is adjusted so that the grey cloth has no longitudinal tension during the shaping process, thereby making the structure of the grey cloth more stable during the washing process and reducing its washing shrinkage.

[0011] Preferably, the vehicle speed is 30-35 m / min.

[0012] By adopting the above technical solution, the vehicle speed is limited, so that the grey cloth is free of longitudinal tension during the shaping process, thereby making the structure of the grey cloth more stable during the washing process and reducing its washing shrinkage.

[0013] Preferably, the setting temperature is 190°C.

[0014] By adopting the above technical solution and adjusting the setting temperature, the molecular structure of the fibers is transformed at high temperature, forming a tighter arrangement and connection, thereby further improving the stability of the fabric structure during the washing process and reducing the washing shrinkage.

[0015] Preferably, the polyester 75D / FDY is spun from three 25D polyester monofilaments, and the 25D polyester monofilament is prepared from the following raw materials in parts by weight: 80 to 100 parts of polyester masterbatch and 9 to 15 parts of modifier. The modifier includes a densifier, a curing agent and an accelerator, and the weight ratio of the densifier, curing agent and accelerator is 5 to 9:2 to 4:2.

[0016] By adopting the above technical solution, polyester is modified with a densifier and a curing agent, so that the density and waterproofness of the fiber are improved, the water shrinkage of the fiber is reduced, and the structural stability of the fiber is improved. The accelerator promotes the curing of the curing agent, thereby improving the stability of the densifier in the fiber, improving the water washing resistance of the fiber, and reducing the water washing shrinkage of the fabric.

[0017] Preferably, the densifier is long-chain fatty acid modified nanoborate.

[0018] By adopting the above technical solution, after the nano borate is modified by long-chain fatty acids, the modified nano borate improves the fiber density while effectively improving the fiber's waterproof performance, and improves the structural stability of the grey cloth during the shaping process, thereby reducing the washing shrinkage of the grey cloth.

[0019] Preferably, the curing agent comprises an aliphatic hydrocarbon resin.

[0020] By adopting the above technical solution, since the nano borate is modified by long-chain fatty acids, the aliphatic hydrocarbon resin will first contact and combine with the long-chain fatty acids, and then increase the connection strength between the curing agent and the densifier, further increase the fiber density, and improve the fiber waterproofness.

[0021] Preferably, the promoter is nano-barium titanate.

[0022] By adopting the above technical solution, since the aliphatic hydrocarbon resin is first combined with the long-chain fatty acid, the nano-barium titanate is used to promote the solidification and crystallization of the aliphatic hydrocarbon resin, thereby solidifying the nano-borate, effectively improving the fiber density and waterproofness.

[0023] Preferably, the 25D polyester monofilament is prepared by the following steps: polyester masterbatch, flame retardant masterbatch, densifier, curing agent and accelerator are melt-blended and spun to prepare the 25D polyester monofilament.

[0024] By adopting the above technical solution, in the actual production process, the required fibers can be produced by blending the raw materials and melt spinning them, which is simple and convenient to operate.

[0025] In a second aspect, the present application discloses a water-washed low-shrinkage sandwich, which is produced by the above process and has a water-washing shrinkage of ≤3%.

[0026] In summary, this application has the following beneficial effects:

[0027] 1. Since the present application adds a chain weave structure on the front side, the stability of the structure of the grey fabric during the washing process is improved, and the shaping temperature, machine speed and overfeed are adjusted, so that the grey fabric is longitudinally tension-free during the shaping process, and the fabric surface appears wavy during the shaping process without generating any tension, thereby effectively reducing the washing shrinkage of the fabric.

[0028] 2. In this application, the densifier and the curing agent are tightly combined by combining the densifier, the curing agent and the accelerator. At this time, the accelerator promotes the crystallization and solidification of the curing agent, thereby tightly fixing the densifier and the accelerator in the fiber, thereby effectively improving the waterproofness of the fiber.

[0029] 3. In this application, long-chain fatty acids are used to modify nano-borates. Long-chain fatty acids are attached to the surface of nano-borates. At this time, long-chain fatty acids can combine with hydroxyl groups in aliphatic hydrocarbon resins, thereby combining the densifier with the curing agent. Barium titanate as a promoter promotes the crystallization of the curing agent, effectively promoting fiber density. DETAILED DESCRIPTION

[0030] The polyester masterbatch in this application is an injection molding grade PET masterbatch; the nanoborate is nano calcium borate and nano zinc borate, both with a particle size of 30 nm; the long-chain fatty acids include oleic acid and linoleic acid, which are purchased from the market; the aliphatic hydrocarbon resin is purchased from the market; and the nano barium titanate is a powder with a particle size of 20 nm.

[0031] The present application is further described in detail below with reference to the embodiments.

[0032] Preparation Example - Long-chain fatty acid modified nanoborate

[0033] Preparation Example 1

[0034] This preparation example discloses a long-chain fatty acid-modified nanoborate, which is prepared by the following steps: mixing 2.5 kg of oleic acid and 1.5 kg of linoleic acid, then adding 0.5 kg of nano-calcium borate and 0.5 kg of nano-zinc borate, stirring and mixing at 60°C for 6 hours at a stirring speed of 60 r / min, and then centrifuging. The precipitate is dried at 80°C for 24 hours to prepare a long-chain fatty acid-modified nanoborate.

[0035] Preparation Example 2

[0036] This preparation example discloses a long-chain fatty acid-modified nanoborate, which is prepared by the following steps: adding 0.5 kg of nano-calcium borate and 0.5 kg of nano-zinc borate to 4 kg of oleic acid, stirring and mixing at 60°C for 6 hours at a stirring speed of 60 r / min, and then centrifuging. The precipitate is dried at 80°C for 24 hours to obtain a long-chain fatty acid-modified nanoborate.

[0037] Preparation Example 3

[0038] This preparation example discloses a long-chain fatty acid-modified nanoborate, which is prepared by the following steps: adding 0.5 kg of nano-calcium borate and 0.5 kg of nano-zinc borate to 4 kg of linoleic acid, stirring and mixing at 60°C for 6 hours at a stirring speed of 60 r / min, and then centrifuging. The precipitate is dried at 80°C for 24 hours to obtain a long-chain fatty acid-modified nanoborate.

[0039] Preparation Example 4

[0040] This preparation example discloses a long-chain fatty acid-modified nanoborate, which is prepared by the following steps: mixing 2.5 kg of oleic acid and 1.5 kg of linoleic acid, then adding 1 kg of nano-calcium borate, stirring and mixing at 60°C for 6 hours at a stirring speed of 60 r / min, and then centrifuging. The precipitate is dried at 80°C for 24 hours to obtain a long-chain fatty acid-modified nanoborate.

[0041] Preparation Example 5

[0042] This preparation example discloses a long-chain fatty acid-modified nanoborate, which is prepared by the following steps: mixing 2.5 kg of oleic acid and 1.5 kg of linoleic acid, adding 1 kg of nano-zinc borate, stirring and mixing at 60°C for 6 hours at a stirring speed of 60 r / min, and then centrifuging. The precipitate is dried at 80°C for 24 hours to obtain a long-chain fatty acid-modified nanoborate.

[0043] Example

[0044] Example 1

[0045] This embodiment provides a polyester monofilament, which is prepared by the following steps:

[0046] S1, 80 kg of polyester masterbatch, 5 kg of long-chain fatty acid-modified nano borate prepared in Preparation Example 1 as a densifying agent, 2 kg of aliphatic hydrocarbon resin as a curing agent, and 2 kg of nano barium titanate as an accelerator were mixed, and heated at 280° C. to prepare a mixed polyester melt;

[0047] S2. Add the polyester melt into the spinning machine for spinning. The spinning temperature is set to 290° C., the FDY assembly pressure is set to 10 MPa, and during the spinning cooling, the air temperature is 22° C., the air humidity is 90%, and the wind speed is 1.55 m / s;

[0048] S3. Winding and stretching the polyester monofilament in S2 to control the final polyester monofilament thickness to be 25D.

[0049] Example 2

[0050] This embodiment provides a polyester monofilament, which is prepared by the following steps:

[0051] S1, 90 kg of polyester masterbatch, 7 kg of long-chain fatty acid-modified nano-borate prepared in Preparation Example 1 as a densifying agent, 3 kg of aliphatic hydrocarbon resin as a curing agent, and 2 kg of nano-barium titanate as an accelerator were mixed, and heated at 280° C. to prepare a mixed polyester melt;

[0052] S2. Add the polyester melt into the spinning machine for spinning. The spinning temperature is set to 290° C., the FDY assembly pressure is set to 10 MPa, and during the spinning cooling, the air temperature is 22° C., the air humidity is 90%, and the wind speed is 1.55 m / s;

[0053] S3. Winding and stretching the polyester monofilament in S2 to control the final polyester monofilament thickness to be 25D.

[0054] Example 3

[0055] This embodiment provides a polyester monofilament, which is prepared by the following steps:

[0056] S1, mixing 100 kg of polyester masterbatch, 9 kg of the long-chain fatty acid-modified nano borate prepared in Preparation Example 1 as a densifying agent, 4 kg of an aliphatic hydrocarbon resin as a curing agent, and 2 kg of nano barium titanate as an accelerator, and heating at 280° C. to prepare a mixed polyester melt;

[0057] S2. Add the polyester melt into the spinning machine for spinning. The spinning temperature is set to 290° C., the FDY assembly pressure is set to 10 MPa, and during the spinning cooling, the air temperature is 22° C., the air humidity is 90%, and the wind speed is 1.55 m / s;

[0058] S3. Winding and stretching the polyester monofilament in S2 to control the final polyester monofilament thickness to be 25D.

[0059] Example 4

[0060] This embodiment provides a polyester monofilament, which is prepared by the following steps:

[0061] S1, 90 kg of polyester masterbatch, 7 kg of long-chain fatty acid-modified nano borate prepared in Preparation Example 2 as a densifying agent, 3 kg of aliphatic hydrocarbon resin as a curing agent, and 2 kg of nano barium titanate as an accelerator were mixed, and heated at 280° C. to prepare a mixed polyester melt;

[0062] S2. Add the polyester melt into the spinning machine for spinning. The spinning temperature is set to 290° C., the FDY assembly pressure is set to 10 MPa, and during the spinning cooling, the air temperature is 22° C., the air humidity is 90%, and the wind speed is 1.55 m / s;

[0063] S3. Winding and stretching the polyester monofilament in S2 to control the final polyester monofilament thickness to be 25D.

[0064] Example 5

[0065] This embodiment provides a polyester monofilament, which is prepared by the following steps:

[0066] S1, 90 kg of polyester masterbatch, 7 kg of long-chain fatty acid-modified nano borate prepared in Preparation Example 3 as a densifying agent, 3 kg of aliphatic hydrocarbon resin as a curing agent, and 2 kg of nano barium titanate as an accelerator were mixed, and heated at 280° C. to prepare a mixed polyester melt;

[0067] S2. Add the polyester melt into the spinning machine for spinning. The spinning temperature is set to 290° C., the FDY assembly pressure is set to 10 MPa, and during the spinning cooling, the air temperature is 22° C., the air humidity is 90%, and the wind speed is 1.55 m / s;

[0068] S3. Winding and stretching the polyester monofilament in S2 to control the final polyester monofilament thickness to be 25D.

[0069] Example 6

[0070] This embodiment provides a polyester monofilament, which is prepared by the following steps:

[0071] S1, 90 kg of polyester masterbatch, 7 kg of long-chain fatty acid-modified nano borate prepared in Preparation Example 4 as a densifying agent, 3 kg of aliphatic hydrocarbon resin as a curing agent, and 2 kg of nano barium titanate as an accelerator were mixed, and heated at 280° C. to prepare a mixed polyester melt;

[0072] S2. Add the polyester melt into the spinning machine for spinning. The spinning temperature is set to 290° C., the FDY assembly pressure is set to 10 MPa, and during the spinning cooling, the air temperature is 22° C., the air humidity is 90%, and the wind speed is 1.55 m / s;

[0073] S3. Winding and stretching the polyester monofilament in S2 to control the final polyester monofilament thickness to be 25D.

[0074] Example 7

[0075] This embodiment provides a polyester monofilament, which is prepared by the following steps:

[0076] S1, 90 kg of polyester masterbatch, 7 kg of long-chain fatty acid-modified nano borate prepared in Preparation Example 5 as a densifying agent, 3 kg of aliphatic hydrocarbon resin as a curing agent, and 2 kg of nano barium titanate as an accelerator were mixed, and heated at 280° C. to prepare a mixed polyester melt;

[0077] S2. Add the polyester melt into the spinning machine for spinning. The spinning temperature is set to 290° C., the FDY assembly pressure is set to 10 MPa, and during the spinning cooling, the air temperature is 22° C., the air humidity is 90%, and the wind speed is 1.55 m / s;

[0078] S3. Winding and stretching the polyester monofilament in S2 to control the final polyester monofilament thickness to be 25D.

[0079] Comparative Example

[0080] Comparative Example 1

[0081] This comparative example provides a polyester monofilament, which is prepared by the following steps:

[0082] S1, 90 kg of polyester masterbatch, 7 kg of long-chain fatty acid-modified nano borate prepared in Preparation Example 1, and 3 kg of aliphatic hydrocarbon resin were mixed and heated at 280° C. to prepare a mixed polyester melt;

[0083] S2. Add the polyester melt into the spinning machine for spinning. The spinning temperature is set to 290° C., the FDY assembly pressure is set to 10 MPa, and during the spinning cooling, the air temperature is 22° C., the air humidity is 90%, and the wind speed is 1.55 m / s;

[0084] S3. Winding and stretching the polyester monofilament in S2 to control the final polyester monofilament thickness to be 25D.

[0085] Comparative Example 2

[0086] This comparative example provides a polyester monofilament, which is prepared by the following steps:

[0087] S1, 90 kg of polyester masterbatch, 7 kg of long-chain fatty acid-modified nano-borate prepared in Preparation Example 1, and 2 kg of nano-barium titanate were mixed, and heated at 280° C. to prepare a mixed polyester melt;

[0088] S2. Add the polyester melt into the spinning machine for spinning. The spinning temperature is set to 290° C., the FDY assembly pressure is set to 10 MPa, and during the spinning cooling, the air temperature is 22° C., the air humidity is 90%, and the wind speed is 1.55 m / s;

[0089] S3. Winding and stretching the polyester monofilament in S2 to control the final polyester monofilament thickness to be 25D.

[0090] Comparative Example 3

[0091] This comparative example provides a polyester monofilament, which is prepared by the following steps:

[0092] S1, 97 kg of polyester masterbatch, 3 kg of aliphatic hydrocarbon resin and 2 kg of nano-barium titanate were mixed and heated at 280° C. to prepare a mixed polyester melt;

[0093] S2. Add the polyester melt into the spinning machine for spinning. The spinning temperature is set to 290° C., the FDY assembly pressure is set to 10 MPa, and during the spinning cooling, the air temperature is 22° C., the air humidity is 90%, and the wind speed is 1.55 m / s;

[0094] S3. Winding and stretching the polyester monofilament in S2 to control the final polyester monofilament thickness to be 25D.

[0095] Comparative Example 4

[0096] This comparative example provides a polyester monofilament, which is prepared by the following steps:

[0097] S1, mixing 95 kg of polyester masterbatch and 7 kg of the long-chain fatty acid-modified nano borate prepared in Preparation Example 1, and heating at 280° C. to prepare a mixed polyester melt;

[0098] S2. Add the polyester melt into the spinning machine for spinning. The spinning temperature is set to 290° C., the FDY assembly pressure is set to 10 MPa, and during the spinning cooling, the air temperature is 22° C., the air humidity is 90%, and the wind speed is 1.55 m / s;

[0099] S3. Winding and stretching the polyester monofilament in S2 to control the final polyester monofilament thickness to be 25D.

[0100] Comparative Example 5

[0101] This comparative example provides a polyester monofilament, which is prepared by the following steps:

[0102] S1, mixing 99 kg of polyester masterbatch and 3 kg of aliphatic hydrocarbon resin, and heating at 280° C. to prepare a mixed polyester melt;

[0103] S2. Add the polyester melt into the spinning machine for spinning. The spinning temperature is set to 290° C., the FDY assembly pressure is set to 10 MPa, and during the spinning cooling, the air temperature is 22° C., the air humidity is 90%, and the wind speed is 1.55 m / s;

[0104] S3. Winding and stretching the polyester monofilament in S2 to control the final polyester monofilament thickness to be 25D.

[0105] Comparative Example 6

[0106] This comparative example provides a polyester monofilament, which is prepared by the following steps:

[0107] S1, mixing 100 kg of polyester masterbatch and 2 kg of nano-barium titanate, and heating at 280° C. to prepare a mixed polyester melt;

[0108] S2. Add the polyester melt into the spinning machine for spinning. The spinning temperature is set to 290° C., the FDY assembly pressure is set to 10 MPa, and during the spinning cooling, the air temperature is 22° C., the air humidity is 90%, and the wind speed is 1.55 m / s;

[0109] S3. Winding and stretching the polyester monofilament in S2 to control the final polyester monofilament thickness to be 25D.

[0110] Comparative Example 7

[0111] This comparative example provides a polyester monofilament, which is prepared by the following steps:

[0112] S1. Heating 100 kg of polyester masterbatch at 280° C. to prepare a polyester melt;

[0113] S2. Add the polyester melt into the spinning machine for spinning. The spinning temperature is set to 290° C., the FDY assembly pressure is set to 10 MPa, and during the spinning cooling, the air temperature is 22° C., the air humidity is 90%, and the wind speed is 1.55 m / s;

[0114] S3. Winding and stretching the polyester monofilament in S2 to control the final polyester monofilament thickness to be 25D.

[0115] Performance testing

[0116] Application example-sandwich fabric

[0117] Application Example 1

[0118] This application example discloses a sandwich fabric production process, comprising the following steps:

[0119] S1. Weaving: The surface and bottom are made of polyester 75D / FDY, which is spun from three 25D polyester monofilaments obtained in Comparative Example 7. The middle filament is made of 30D polyester monofilament, and the surface is made into a chain weave to form a diamond-shaped fabric.

[0120] S2, overfeeding: overfeed the diamond-shaped fabric and maintain positive overfeeding, wherein the upper overfeeding is +10 and the lower overfeeding is +5;

[0121] S3. Presetting: The grey fabric is fed into the setting machine for presetting, wherein the presetting temperature is 190°C, the upper and lower blowing speed is 1200r / min, the machine speed is 30m / min, and the setting time is 60s;

[0122] S4, dyeing: the predetermined grey fabric is placed in a dyeing vat and dyed with disperse dyes at a dyeing temperature of 130°C and a pressure of 0.6 MPa. The dyed grey fabric is subjected to a stretching and dehydration treatment;

[0123] S5. Setting: The dyed grey cloth is sent to a setting machine for setting, wherein the setting temperature is 190°C, the upper and lower blowing speed is 1400r / min, the machine speed is 30m / min, and the setting time is 60s to produce a sandwich fabric.

[0124] Application Example 2

[0125] S1. Weaving: The surface and bottom are made of polyester 75D / FDY, which is spun from three 25D polyester monofilaments obtained in Comparative Example 7. The middle filament is made of 30D polyester monofilament, and the surface is made into a chain weave to form a diamond-shaped fabric.

[0126] S2, overfeeding: overfeed the diamond-shaped fabric and maintain positive overfeeding, wherein the upper overfeeding is +8 and the lower overfeeding is +5;

[0127] S3. Presetting: The grey fabric is fed into the setting machine for presetting, wherein the presetting temperature is 190°C, the upper and lower blowing speed is 1200r / min, the machine speed is 30m / min, and the setting time is 60s;

[0128] S4, dyeing: the predetermined grey fabric is placed in a dyeing vat and dyed with disperse dyes at a dyeing temperature of 130°C and a pressure of 0.6 MPa. The dyed grey fabric is subjected to a stretching and dehydration treatment;

[0129] S5. Setting: The dyed grey cloth is sent to a setting machine for setting, wherein the setting temperature is 190°C, the upper and lower blowing speed is 1400r / min, the machine speed is 30m / min, and the setting time is 60s to produce a sandwich fabric.

[0130] Application Example 3

[0131] S1. Weaving: The surface and bottom are made of polyester 75D / FDY, which is spun from three 25D polyester monofilaments obtained in Comparative Example 7. The middle filament is made of 30D polyester monofilament, and the surface is made into a chain weave to form a diamond-shaped fabric.

[0132] S2, overfeeding: overfeed the diamond-shaped fabric and maintain positive overfeeding, wherein the upper overfeeding is +10 and the lower overfeeding is +5;

[0133] S3. Presetting: The grey fabric is fed into the setting machine for presetting, wherein the presetting temperature is 190°C, the upper and lower blowing speed is 1200r / min, the machine speed is 35m / min, and the setting time is 60s;

[0134] S4, dyeing: the predetermined grey fabric is placed in a dyeing vat and dyed with disperse dyes at a dyeing temperature of 130°C and a pressure of 0.6 MPa. The dyed grey fabric is subjected to a stretching and dehydration treatment;

[0135] S5. Setting: The dyed grey cloth is sent to a setting machine for setting, wherein the setting temperature is 190°C, the upper and lower blowing speed is 1400r / min, the machine speed is 35m / min, and the setting time is 60s to produce a sandwich fabric.

[0136] Application Example 4

[0137] S1. Weaving: The surface and bottom are made of polyester 75D / FDY, which is spun from three 25D polyester monofilaments prepared in Example 1. The middle part is made of 30D polyester monofilament, and the surface is made into a chain weave to form a diamond-shaped fabric.

[0138] S2, overfeeding: overfeed the diamond-shaped fabric and maintain positive overfeeding, wherein the upper overfeeding is +8 and the lower overfeeding is +5;

[0139] S3. Presetting: The grey fabric is fed into the setting machine for presetting, wherein the presetting temperature is 190°C, the upper and lower blowing speed is 1200r / min, the machine speed is 30m / min, and the setting time is 60s;

[0140] S4, dyeing: the predetermined grey fabric is placed in a dyeing vat and dyed with disperse dyes at a dyeing temperature of 130°C and a pressure of 0.6 MPa. The dyed grey fabric is subjected to a stretching and dehydration treatment;

[0141] S5. Setting: The dyed grey cloth is sent to a setting machine for setting, wherein the setting temperature is 190°C, the upper and lower blowing speed is 1400r / min, the machine speed is 30m / min, and the setting time is 60s to produce a sandwich fabric.

[0142] Application Example 5

[0143] S1. Weaving: The surface and bottom are made of polyester 75D / FDY, which is spun from three 25D polyester monofilaments prepared in Example 2. The middle part is made of 30D polyester monofilament, and the surface is made into a chain weave to form a diamond-shaped fabric.

[0144] S2, overfeeding: overfeed the diamond-shaped fabric and maintain positive overfeeding, wherein the upper overfeeding is +8 and the lower overfeeding is +5;

[0145] S3. Presetting: The grey fabric is fed into the setting machine for presetting, wherein the presetting temperature is 190°C, the upper and lower blowing speed is 1200r / min, the machine speed is 30m / min, and the setting time is 60s;

[0146] S4, dyeing: the predetermined grey fabric is placed in a dyeing vat and dyed with disperse dyes at a dyeing temperature of 130°C and a pressure of 0.6 MPa. The dyed grey fabric is subjected to a stretching and dehydration treatment;

[0147] S5. Setting: The dyed grey cloth is sent to a setting machine for setting, wherein the setting temperature is 190°C, the upper and lower blowing speed is 1400r / min, the machine speed is 30m / min, and the setting time is 60s to produce a sandwich fabric.

[0148] Application Example 6

[0149] S1. Weaving: The surface and bottom are made of polyester 75D / FDY, which is spun from three 25D polyester monofilaments prepared in Example 3. The middle part is made of 30D polyester monofilament, and the surface is made into a chain weave to form a diamond-shaped fabric.

[0150] S2, overfeeding: overfeed the diamond-shaped fabric and maintain positive overfeeding, wherein the upper overfeeding is +8 and the lower overfeeding is +5;

[0151] S3. Presetting: The grey fabric is fed into the setting machine for presetting, wherein the presetting temperature is 190°C, the upper and lower blowing speed is 1200r / min, the machine speed is 30m / min, and the setting time is 60s;

[0152] S4, dyeing: the predetermined grey fabric is placed in a dyeing vat and dyed with disperse dyes at a dyeing temperature of 130°C and a pressure of 0.6 MPa. The dyed grey fabric is subjected to a stretching and dehydration treatment;

[0153] S5. Setting: The dyed grey cloth is sent to a setting machine for setting, wherein the setting temperature is 190°C, the upper and lower blowing speed is 1400r / min, the machine speed is 30m / min, and the setting time is 60s to produce a sandwich fabric.

[0154] Application Example 7

[0155] S1. Weaving: The surface and bottom are made of polyester 75D / FDY, which is spun from three 25D polyester monofilaments prepared in Example 4. The middle part is made of 30D polyester monofilament, and the surface is made into a chain weave to form a diamond-shaped fabric.

[0156] S2, overfeeding: overfeed the diamond-shaped fabric and maintain positive overfeeding, wherein the upper overfeeding is +8 and the lower overfeeding is +5;

[0157] S3. Presetting: The grey fabric is fed into the setting machine for presetting, wherein the presetting temperature is 190°C, the upper and lower blowing speed is 1200r / min, the machine speed is 30m / min, and the setting time is 60s;

[0158] S4, dyeing: the predetermined grey fabric is placed in a dyeing vat and dyed with disperse dyes at a dyeing temperature of 130°C and a pressure of 0.6 MPa. The dyed grey fabric is subjected to a stretching and dehydration treatment;

[0159] S5. Setting: The dyed grey cloth is sent to a setting machine for setting, wherein the setting temperature is 190°C, the upper and lower blowing speed is 1400r / min, the machine speed is 30m / min, and the setting time is 60s to produce a sandwich fabric.

[0160] Application Example 8

[0161] S1. Weaving: The surface and bottom are made of polyester 75D / FDY, which is spun from three 25D polyester monofilaments prepared in Example 5. The middle part is made of 30D polyester monofilament, and the surface is made into a chain weave to form a diamond-shaped fabric.

[0162] S2, overfeeding: overfeed the diamond-shaped fabric and maintain positive overfeeding, wherein the upper overfeeding is +8 and the lower overfeeding is +5;

[0163] S3. Presetting: The grey fabric is fed into the setting machine for presetting, wherein the presetting temperature is 190°C, the upper and lower blowing speed is 1200r / min, the machine speed is 30m / min, and the setting time is 60s;

[0164] S4, dyeing: the predetermined grey fabric is placed in a dyeing vat and dyed with disperse dyes at a dyeing temperature of 130°C and a pressure of 0.6 MPa. The dyed grey fabric is subjected to a stretching and dehydration treatment;

[0165] S5. Setting: The dyed grey cloth is sent to a setting machine for setting, wherein the setting temperature is 190°C, the upper and lower blowing speed is 1400r / min, the machine speed is 30m / min, and the setting time is 60s to produce a sandwich fabric.

[0166] Application Example 9

[0167] S1. Weaving: The surface and bottom are made of polyester 75D / FDY, which is spun from three 25D polyester monofilaments prepared in Example 6. The middle part is made of 30D polyester monofilament, and the surface is made into a chain weave to form a diamond-shaped fabric.

[0168] S2, overfeeding: overfeed the diamond-shaped fabric and maintain positive overfeeding, wherein the upper overfeeding is +8 and the lower overfeeding is +5;

[0169] S3. Presetting: The grey fabric is fed into the setting machine for presetting, wherein the presetting temperature is 190°C, the upper and lower blowing speed is 1200r / min, the machine speed is 30m / min, and the setting time is 60s;

[0170] S4, dyeing: the predetermined grey fabric is placed in a dyeing vat and dyed with disperse dyes at a dyeing temperature of 130°C and a pressure of 0.6 MPa. The dyed grey fabric is subjected to a stretching and dehydration treatment;

[0171] S5. Setting: The dyed grey cloth is sent to a setting machine for setting, wherein the setting temperature is 190°C, the upper and lower blowing speed is 1400r / min, the machine speed is 30m / min, and the setting time is 60s to produce a sandwich fabric.

[0172] Application Example 10

[0173] S1. Weaving: The surface and bottom are made of polyester 75D / FDY, which is spun from three 25D polyester monofilaments prepared in Example 7. The middle part is made of 30D polyester monofilament, and the surface is made into a chain weave to form a diamond-shaped fabric.

[0174] S2, overfeeding: overfeed the diamond-shaped fabric and maintain positive overfeeding, wherein the upper overfeeding is +8 and the lower overfeeding is +5;

[0175] S3. Presetting: The grey fabric is fed into the setting machine for presetting, wherein the presetting temperature is 190°C, the upper and lower blowing speed is 1200r / min, the machine speed is 30m / min, and the setting time is 60s;

[0176] S4, dyeing: the predetermined grey fabric is placed in a dyeing vat and dyed with disperse dyes at a dyeing temperature of 130°C and a pressure of 0.6 MPa. The dyed grey fabric is subjected to a stretching and dehydration treatment;

[0177] S5. Setting: The dyed grey cloth is sent to a setting machine for setting, wherein the setting temperature is 190°C, the upper and lower blowing speed is 1400r / min, the machine speed is 30m / min, and the setting time is 60s to produce a sandwich fabric.

[0178] Application Example 11

[0179] S1. Weaving: The surface and bottom are made of polyester 75D / FDY, which is spun from three 25D polyester monofilaments obtained in Comparative Example 1. The middle part is made of 30D polyester monofilament, and the surface is made into a chain weave to form a diamond-shaped fabric.

[0180] S2, overfeeding: overfeed the diamond-shaped fabric and maintain positive overfeeding, wherein the upper overfeeding is +8 and the lower overfeeding is +5;

[0181] S3. Presetting: The grey fabric is fed into the setting machine for presetting, wherein the presetting temperature is 190°C, the upper and lower blowing speed is 1200r / min, the machine speed is 30m / min, and the setting time is 60s;

[0182] S4, dyeing: the predetermined grey fabric is placed in a dyeing vat and dyed with disperse dyes at a dyeing temperature of 130°C and a pressure of 0.6 MPa. The dyed grey fabric is subjected to a stretching and dehydration treatment;

[0183] S5. Setting: The dyed grey cloth is sent to a setting machine for setting, wherein the setting temperature is 190°C, the upper and lower blowing speed is 1400r / min, the machine speed is 30m / min, and the setting time is 60s to produce a sandwich fabric.

[0184] Application Example 12

[0185] S1. Weaving: The surface and bottom are made of polyester 75D / FDY, which is spun from three 25D polyester monofilaments obtained in Comparative Example 2. The middle part is made of 30D polyester monofilament, and the surface is made into a chain weave to form a diamond-shaped fabric.

[0186] S2, overfeeding: overfeed the diamond-shaped fabric and maintain positive overfeeding, wherein the upper overfeeding is +8 and the lower overfeeding is +5;

[0187] S3. Presetting: The grey fabric is fed into the setting machine for presetting, wherein the presetting temperature is 190°C, the upper and lower blowing speed is 1200r / min, the machine speed is 30m / min, and the setting time is 60s;

[0188] S4, dyeing: the predetermined grey fabric is placed in a dyeing vat and dyed with disperse dyes at a dyeing temperature of 130°C and a pressure of 0.6 MPa. The dyed grey fabric is subjected to a stretching and dehydration treatment;

[0189] S5. Setting: The dyed grey cloth is sent to a setting machine for setting, wherein the setting temperature is 190°C, the upper and lower blowing speed is 1400r / min, the machine speed is 30m / min, and the setting time is 60s to produce a sandwich fabric.

[0190] Application Example 13

[0191] S1. Weaving: The surface and bottom are made of polyester 75D / FDY, which is spun from three 25D polyester monofilaments obtained in Comparative Example 3. The middle part is made of 30D polyester monofilament, and the surface is made into a chain weave to form a diamond-shaped fabric.

[0192] S2, overfeeding: overfeed the diamond-shaped fabric and maintain positive overfeeding, wherein the upper overfeeding is +8 and the lower overfeeding is +5;

[0193] S3. Presetting: The grey fabric is fed into the setting machine for presetting, wherein the presetting temperature is 190°C, the upper and lower blowing speed is 1200r / min, the machine speed is 30m / min, and the setting time is 60s;

[0194] S4, dyeing: the predetermined grey fabric is placed in a dyeing vat and dyed with disperse dyes at a dyeing temperature of 130°C and a pressure of 0.6 MPa. The dyed grey fabric is subjected to a stretching and dehydration treatment;

[0195] S5. Setting: The dyed grey cloth is sent to a setting machine for setting, wherein the setting temperature is 190°C, the upper and lower blowing speed is 1400r / min, the machine speed is 30m / min, and the setting time is 60s to produce a sandwich fabric.

[0196] Application Example 14

[0197] S1. Weaving: The surface and bottom are made of polyester 75D / FDY, which is spun from three 25D polyester monofilaments obtained in Comparative Example 4. The middle part is made of 30D polyester monofilament, and the surface is made into a chain weave to form a diamond-shaped fabric.

[0198] S2, overfeeding: overfeed the diamond-shaped fabric and maintain positive overfeeding, wherein the upper overfeeding is +8 and the lower overfeeding is +5;

[0199] S3. Presetting: The grey fabric is fed into the setting machine for presetting, wherein the presetting temperature is 190°C, the upper and lower blowing speed is 1200r / min, the machine speed is 30m / min, and the setting time is 60s;

[0200] S4, dyeing: the predetermined grey fabric is placed in a dyeing vat and dyed with disperse dyes at a dyeing temperature of 130°C and a pressure of 0.6 MPa. The dyed grey fabric is subjected to a stretching and dehydration treatment;

[0201] S5. Setting: The dyed grey cloth is sent to a setting machine for setting, wherein the setting temperature is 190°C, the upper and lower blowing speed is 1400r / min, the machine speed is 30m / min, and the setting time is 60s to produce a sandwich fabric.

[0202] Application Example 15

[0203] S1. Weaving: The surface and bottom are made of polyester 75D / FDY, which is spun from three 25D polyester monofilaments obtained in Comparative Example 5. The middle part is made of 30D polyester monofilament, and the surface is made into a chain weave to form a diamond-shaped fabric.

[0204] S2, overfeeding: overfeed the diamond-shaped fabric and maintain positive overfeeding, wherein the upper overfeeding is +8 and the lower overfeeding is +5;

[0205] S3. Presetting: The grey fabric is fed into the setting machine for presetting, wherein the presetting temperature is 190°C, the upper and lower blowing speed is 1200r / min, the machine speed is 30m / min, and the setting time is 60s;

[0206] S4, dyeing: the predetermined grey fabric is placed in a dyeing vat and dyed with disperse dyes at a dyeing temperature of 130°C and a pressure of 0.6 MPa. The dyed grey fabric is subjected to a stretching and dehydration treatment;

[0207] S5. Setting: The dyed grey cloth is sent to a setting machine for setting, wherein the setting temperature is 190°C, the upper and lower blowing speed is 1400r / min, the machine speed is 30m / min, and the setting time is 60s to produce a sandwich fabric.

[0208] Application Example 16

[0209] S1. Weaving: The surface and bottom are made of polyester 75D / FDY, which is spun from three 25D polyester monofilaments obtained in Comparative Example 6. The middle part is made of 30D polyester monofilament, and the surface is made into a chain weave to form a diamond-shaped fabric.

[0210] S2, overfeeding: overfeed the diamond-shaped fabric and maintain positive overfeeding, wherein the upper overfeeding is +8 and the lower overfeeding is +5;

[0211] S3. Presetting: The grey fabric is fed into the setting machine for presetting, wherein the presetting temperature is 190°C, the upper and lower blowing speed is 1200r / min, the machine speed is 30m / min, and the setting time is 60s;

[0212] S4, dyeing: the predetermined grey fabric is placed in a dyeing vat and dyed with disperse dyes at a dyeing temperature of 130°C and a pressure of 0.6 MPa. The dyed grey fabric is subjected to a stretching and dehydration treatment;

[0213] S5. Setting: The dyed grey cloth is sent to a setting machine for setting, wherein the setting temperature is 190°C, the upper and lower blowing speed is 1400r / min, the machine speed is 30m / min, and the setting time is 60s to produce a sandwich fabric.

[0214] Application Example 17

[0215] S1. Weaving: The surface and bottom are made of polyester 75D / FDY as the raw material, and the middle is made of 30D polyester monofilament as the raw material. The surface is made of warp plain weave and woven into diamond-shaped fabric;

[0216] S2, overfeeding: overfeed the diamond-shaped fabric and maintain positive overfeeding, wherein the upper overfeeding is +8 and the lower overfeeding is +5;

[0217] S3. Presetting: The grey fabric is fed into the setting machine for presetting, wherein the presetting temperature is 190°C, the upper and lower blowing speed is 1200r / min, the machine speed is 30m / min, and the setting time is 60s;

[0218] S4, dyeing: the predetermined grey fabric is placed in a dyeing vat and dyed with disperse dyes at a dyeing temperature of 130°C and a pressure of 0.6 MPa. The dyed grey fabric is subjected to a stretching and dehydration treatment;

[0219] S5. Setting: The dyed grey cloth is sent to a setting machine for setting, wherein the setting temperature is 190°C, the upper and lower blowing speed is 1400r / min, the machine speed is 30m / min, and the setting time is 60s to produce a sandwich fabric.

[0220] Detection method

[0221] The sandwich fabrics prepared in Examples 1-17 were washed and tested for shrinkage according to GB / T 8629-2017, "Textile Testing - Household Washing and Drying Procedures." A Type A standard washing machine was used, with Standard Detergent 2 as the detergent. The drying cycle was Program A - Hang Dry, and the laundry was Type III as specified in Appendix H.

[0222] With reference to GB / T 8630-2013 “Textiles — Determination of dimensional changes after washing and drying”, the samples were tested after washing and drying five times, with each wash lasting 30 minutes.

[0223] The shrinkage rate is calculated as (original size in the corresponding direction - size in the corresponding direction after washing) / original size in the corresponding direction * 100%.

[0224] Table 1 Shrinkage of sandwich fabrics

[0225] Transverse shrinkage (%) Longitudinal shrinkage (%) Application Example 1 -3 +3 Application Example 2 -2.8 +2.8 Application Example 3 -3 +3 Application Example 4 -2 +1.8 Application Example 5 -1.8 +1.6 Application Example 6 -2 +1.8 Application Example 7 -2.4 +2.4 Application Example 8 -2.4 +2.4 Application Example 9 -2.4 +2.4 Application Example 10 -2.4 +2.4 Application Example 11 -2.2 +2.2 Application Example 12 -2.2 +2.2 Application Example 13 -2.2 +2.2 Application Example 14 -2.6 +2.6 Application Example 15 -2.6 +2.6 Application Example 16 -2.6 +2.6 Application Example 17 -6.2 +6.4

[0226] Combining Application Example 2 and Application Example 17 with Table 1, it can be seen that by adding chain stitch to the sandwich fabric, the washing shrinkage of the sandwich fabric when using ordinary polyester yarn can be effectively reduced.

[0227] From Application Example 2, Application Example 5, and Application Examples 11-16 and Table 1, it can be seen that by modifying polyester with a densifier and a curing agent, the density and waterproofness of the fiber are improved, the water shrinkage of the fiber is reduced, and the structural stability of the fiber is improved. The accelerator promotes the curing of the curing agent, thereby improving the stability of the densifier in the fiber, improving the water washing resistance of the fiber, and reducing the water washing shrinkage of the fabric.

[0228] Combining Application Examples 5, 7, and 8 with Table 1, it can be seen that using a mixture of oleic acid and linoleic acid as long-chain fatty acids to modify nanoborate has a better modification effect than using oleic acid or linoleic acid alone.

[0229] Combining Application Example 5, Application Example 9 and Application Example 10 and Table 1, it can be seen that nano calcium borate and nano zinc borate are modified by long-chain fatty acids. By mixing the two, the loading amount of long-chain fatty acids on the nano borate is increased, which is more conducive to the combination of the densifier and the curing agent, thereby improving the overall stability.

[0230] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A water-washed low-shrinkage sandwich production process, characterized in that: The following steps are involved: The surface and bottom are made of polyester 75D / FDY, and the middle is made of 30D polyester monofilament. The surface is made into a chain structure and woven into a diamond-shaped grey cloth. The diamond-shaped grey cloth is overfed and maintained in positive overfeed, and then pre-drying, dyeing and customization are performed to obtain a sandwich fabric, and the washing shrinkage of the sandwich fabric is ≤3%; the polyester 75D / FDY is spun from three 25D polyester monofilaments, and the 25D polyester monofilament is prepared from the following raw materials in parts by weight: 80-100 parts of polyester masterbatch, 8-10 parts of flame retardant masterbatch, and 9-15 parts of modifier. The modifier includes a densifier, a curing agent and an accelerator, and the weight ratio of the densifier, curing agent and accelerator is 5-9:2-4:2; the densifier is a long-chain fatty acid modified nano-borate, and the nano-borate is nano-calcium borate and nano-zinc borate, and the particle size is 30nm; the curing agent includes an aliphatic hydrocarbon resin.

2. The water-washed low-shrinkage sandwich production process according to claim 1, characterized in that: The overfeeding is +5 to +8.

3. The water-washed low-shrinkage sandwich production process according to claim 2, characterized in that: The vehicle speed during the reservation process is 30-35m / min.

4. The water-washed low-shrinkage sandwich production process according to claim 2, characterized in that: The setting temperature during the setting process is 190℃.

5. The water-washed low-shrinkage sandwich production process according to claim 1, characterized in that: The accelerator is nano-barium titanate.

6. The water-washed low-shrinkage sandwich production process according to claim 1, characterized in that: The 25D polyester monofilament is prepared by the following steps: polyester masterbatch, flame retardant masterbatch, densifier, curing agent and accelerator are melt-blended and spun to prepare the 25D polyester monofilament.