Functional plant fiber fabric and manufacturing process thereof

Abstract

The invention relates to the technical field of fabrics, and discloses a functional plant fiber fabric and a manufacturing process thereof.The functional plant fiber fabric is manufactured by weaving cotton fibers and polyester fibers as raw materials and then conducting padding finishing through flame-retardant finishing liquid; the flame-retardant finishing liquid is prepared from the following raw materials: a composite flame-retardant additive, an inorganic modified filler, an antioxidant 1010, sodium dodecyl benzene sulfonate and water; wherein the composite flame-retardant additive is prepared by introducing a nitrogen-phosphorus flame retardant into the structure of bletilla striata polysaccharide; according to the flame-retardant and smoke-suppressing plant fiber fabric, hydrotalcite and ferrocene methanol are chemically connected through covalent grafting of the inorganic modified filler, the efficient charring flame-retardant performance of the composite flame-retardant additive and the unique flame-retardant and smoke-suppressing performance of the inorganic modified filler are combined, and the flame-retardant and smoke-suppressing performance of the plant fiber fabric is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of fabrics, and in particular to a functional plant fiber fabric and a manufacturing process thereof. Background Art

[0002] Fabrics are mainly used to make clothing, home textiles and medical textiles, and are an indispensable part of human life. Fabrics can be divided into chemical fibers and natural fibers according to the source of their ingredients. Chemical fibers include polyester fibers, nylon fibers and polypropylene fibers, and natural fibers include cotton fibers, bamboo fibers and ramie fibers. Among them, fabrics made of polyester fibers have the advantages of high strength, good elasticity, good wrinkle resistance, and not easy to deform, but have problems with poor moisture absorption and air permeability. Fabrics made of cotton fibers have the advantages of good moisture absorption, air permeability, softness, and warmth retention, but have disadvantages such as easy wrinkling and easy deformation. Therefore, polyester fibers and cotton fibers are blended to combine the respective advantages of the two fibers to produce a new type of fabric with superior comprehensive performance.

[0003] With the improvement of people's quality of life and the development of material technology, the functionality of fabrics has received more and more attention. Among them, fabrics with flame retardant effects are especially important for some special industry personnel, such as firefighters, steel workers, etc. However, polyester-cotton blended fabrics have poor flame retardancy and will produce a lot of heat and smoke during the combustion process. These heat and smoke not only pose a threat to personnel safety, but also pollute the environment. Therefore, improving the flame retardant and smoke suppression properties of polyester-cotton blended fabrics is of great practical significance.

[0004] In the prior art, the flame retardant properties of fabrics are mostly improved by immersing the fabrics in a finishing liquid with flame retardant properties for treatment, thereby giving the fabrics good flame retardant properties. For example, the invention patent with publication number CN115418849B discloses a flame retardant fabric and a preparation method thereof. The invention prepares the flame retardant fabric by ultrasonic cleaning of the woven fabric with NaHCO3 aqueous solution, microwave plasma treatment, two finishing liquid treatments, and a cleaning and finishing process. The flame retardant properties of the fabric are improved by preparing a finishing liquid with flame retardant properties. However, the invention does not make improvements in smoke suppression, and the application field of the fabric is limited to certain extent. Summary of the invention

[0005] The purpose of the present invention is to provide a functional plant fiber fabric and a production process thereof, which solves the following technical problems:

[0006] (1) Solved the problem of poor flame retardancy of ordinary fabrics;

[0007] (2) The problem of poor smoke suppression performance of ordinary fabrics has been solved.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] A process for producing a functional plant fiber fabric comprises the following steps:

[0010] (i) Weaving 60 to 80 cotton fibers and 40 to 60 polyester fibers into yarns through a spinning machine to obtain cotton fiber yarns and polyester fiber yarns;

[0011] (ii) 80-100D cotton fiber yarn and 40-60D polyester fiber yarn are firstly network compounded, and then twisted under the condition of twisting degree of 450-550T / M and S direction, and then warped by slitting, the warping speed is 150-250r / min, and the warp is transmitted to form warp yarn;

[0012] (III) 120-160D cotton fiber yarn and 80-100D polyester fiber yarn are firstly network compounded and then twisted under the condition of twisting degree of 540-620T / M and S direction, and then warped by slitting, the warping speed is 200-240r / min, and the heald is transmitted to form the weft yarn;

[0013] (IV): placing the warp yarn and the weft yarn on a jet machine for weaving, sending the woven fabric into a dryer for drying and shaping, and setting the drying temperature to 70-90° C. to obtain the dried and shaped fabric;

[0014] (V): Add 5 to 7 parts by weight of a composite flame retardant additive, 4 to 8 parts of an inorganic modified filler, 1 to 2 parts of an antioxidant 1010, 2 to 4 parts of sodium dodecylbenzene sulfonate and 40 to 60 parts of water into a mixer, raise the temperature to 35 to 45° C., and stir at a stirring rate of 200 to 400 r / min for 1 to 2 hours to obtain a flame retardant finishing liquid;

[0015] (Six): Place the dried and shaped fabric in a flame retardant finishing liquid, according to a bath ratio of 1:30-40, and pad and finish at 40-50°C for 30-50 minutes, and then dry at 60-80°C for 5-10 hours to obtain a plant fiber fabric.

[0016] Furthermore, the preparation process of the composite flame retardant additive comprises the following steps:

[0017] A1: Mechanically stir the solution of Bletilla striata polysaccharide, 6-chloronicotinic acid and dimethyl sulfoxide evenly, add an acid binding agent, raise the temperature to 70-80°C, keep the temperature for 3-5 hours, and discharge the material to obtain modified Bletilla striata polysaccharide;

[0018] A2: Under the action of an esterification catalyst, the modified Bletilla striata polysaccharide, hydroxyethylidene diphosphonic acid and N,N-dimethylformamide are stirred and mixed, and heating is turned on. After the system temperature reaches 100-110°C, stirring is carried out at a constant temperature for 2-6 hours, and the material is discharged after cooling to room temperature to obtain a composite flame retardant additive.

[0019] Furthermore, in step A1, the mass ratio of the bletilla striata polysaccharide to 6-chloronicotinic acid is 1:0.05-0.2.

[0020] Furthermore, in step A1, the acid binding agent is any one of triethylamine or pyridine.

[0021] Furthermore, in step A2, the esterification catalyst is a complex of N-hydroxysuccinimide and dicyclohexylcarbodiimide, with a mass ratio of 0.2 to 0.5:1.

[0022] Furthermore, the preparation process of the inorganic modified filler comprises the following steps:

[0023] AA1: Under the action of a promoter, hydrotalcite and chloromethyldichloromethylsilane are placed in a mixed solution of ethanol and deionized water, and ultrasonicated to form a uniform mixed solution. The system temperature is raised to 60-70°C under stirring conditions and kept warm for 4-6 hours to obtain modified hydrotalcite;

[0024] AA2: Add modified hydrotalcite, ferrocene methanol and toluene into a reaction kettle, stir evenly, then add potassium hydroxide, keep warm and stir at 70-80°C for 4-8h to obtain an inorganic modified filler.

[0025] Furthermore, in step AA1, the average particle size of the hydrotalcite is 2 μm.

[0026] Furthermore, in step AA1, the volume ratio of the ethanol to the deionized water is 1:0.5-1.5.

[0027] Furthermore, in step AA1, the accelerator is any one of sodium carbonate, potassium carbonate or sodium bicarbonate.

[0028] A functional plant fiber fabric is made by adopting the above-mentioned production process.

[0029] Beneficial effects of the present invention:

[0030] (1) The present invention introduces a nitrogen-phosphorus flame retardant into the structure of Bletilla striata polysaccharide to prepare a composite flame retardant additive. During the combustion process, the composite flame retardant additive can form a continuous and dense carbon layer structure to produce an expanding flame retardant effect, which is beneficial to form an effective heat insulation barrier in the event of a fire, isolating the entry of heat and oxygen, preventing further combustion of the internal substrate, and making it difficult for the combustion to continue, thereby effectively improving the flame retardant properties of the plant fiber fabric, reducing the destructiveness of the fire and the risk of casualties, and broadening the application range of the plant fiber fabric.

[0031] (2) The present invention uses hydrotalcite as a matrix to prepare an inorganic modified filler. After the surface of the hydrotalcite is organically modified, its dispersibility in the matrix can be improved, making it less likely to agglomerate during use. In addition, due to its special lamellar structure, it can form a physical barrier layer in the matrix after uniform dispersion, producing a barrier effect, thereby hindering the transfer of heat and effectively isolating oxygen, thereby slowing down the thermal decomposition rate, improving the flame retardant properties of the fabric, and reducing the release of smoke. The silicon-containing compound grafted on the surface of the hydrotalcite can play a synergistic role with the composite flame retardant additive to further improve the flame retardant properties of the fabric. In addition, the ferrocene on the surface of the hydrotalcite can play a smoke suppression role during combustion, so that the prepared plant fiber fabric has good smoke suppression performance and avoids the generation of a large amount of smoke and harmful gases during the combustion process. The composite flame retardant additive and the inorganic modified filler can form an organic-inorganic dual synergistic flame retardant effect, so that the flame retardant and smoke suppression properties of the plant fiber fabric can be effectively improved with a relatively small addition amount.

[0032] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0034] Figure 1 It is an infrared spectrum test chart of the bletilla striata polysaccharide, the modified bletilla striata polysaccharide and the composite flame retardant additive of the present invention.

[0035] Figure 2 This is an infrared spectrum test chart of the inorganic modified filler of the present invention. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The preparation process of the composite flame retardant additive and inorganic modified filler in the following examples and comparative examples of the present invention is as follows:

[0038] 1. Preparation of composite flame retardant additives

[0039] A1: Add 6g of Bletilla striata polysaccharide and dimethyl sulfoxide solution into the reactor, stir at room temperature for 20min, pass nitrogen protection, then add 1g of 6-chloronicotinic acid and 0.05g of triethylamine, stir evenly with magnetic force, keep warm at 75℃ for 4h, wait for the material to cool naturally, discharge the material, and obtain modified Bletilla striata polysaccharide;

[0040] A2: 6g of modified Bletilla striata polysaccharide and N,N-dimethylformamide were stirred and mixed, nitrogen was passed through, and after the air was exhausted, 1.2g of hydroxyethylidene diphosphonic acid was added and stirred evenly, and then 0.1g of N-hydroxysuccinimide and 0.4g of dicyclohexylcarbodiimide were added. After the addition was completed, heating was turned on. After the system temperature reached 105°C, constant temperature stirring was performed for 4h, and heating was stopped and nitrogen was removed. After cooling to room temperature, the material was discharged to obtain a composite flame retardant additive.

[0041] Bruker TENSOR-II Fourier transform infrared spectrometer was used to analyze the Bletilla striata polysaccharide, modified Bletilla striata polysaccharide and composite flame retardant additive by infrared spectroscopy. Figure 1 As shown by Figure 1 It can be seen that in the infrared spectrum of Bletilla striata polysaccharide, 3281cm -1 The absorption peak of hydroxyl group OH appears at 1006cm -1 The absorption peak of ether bond COC appears at 1673 cm -1 The absorption peak of C=N appeared at 1359cm -1 The absorption peak of CN appeared at 1030cm -1 The absorption peak of ether bond COC appears at 1741 cm -1 The absorption peak of the carboxyl group C=O appears at 1661cm -1 The absorption peak of C=N appeared at 1380cm -1 The absorption peak of CN appeared at 1279 cm -1The absorption peak of P=O appeared at 1050cm -1 The absorption peak of ether bond COC appears at 1758 cm -1 The absorption peak of the ester group C=O appears at , and the absorption peak of the carboxyl group disappears.

[0042] It can be inferred that the principle of the above scheme is: the structure of Bletilla striata polysaccharide contains hydroxyl groups, which can react with the halogen functional groups in the structure of 6-chloronicotinic acid under the action of triethylamine, and introduce carboxyl groups into the structure of Bletilla striata polysaccharide to obtain modified Bletilla striata polysaccharide, and use the carboxyl groups in its structure as active sites. Under the action of N-hydroxysuccinimide and dicyclohexylcarbodiimide, the carboxyl groups can react with the hydroxyl groups in the structure of hydroxyethylidene diphosphonic acid, and hydroxyethylidene diphosphonic acid is introduced into the structure of Bletilla striata polysaccharide to obtain a composite flame retardant additive.

[0043] 2. Preparation of Inorganic Modified Fillers

[0044] AA1: Under continuous nitrogen conditions, 5 g of hydrotalcite with an average particle size of 2 μm and 1.4 g of chloromethyldichloromethylsilane were added to a mixed solution of ethanol and deionized water in a volume ratio of 1:1, and ultrasonication was performed to form a uniform mixed solution. Then, 0.08 g of sodium carbonate was added to the mixed solution. The system temperature was raised to 65°C under stirring conditions and kept warm for 5 h. The solid material was separated by filtration, and the modified hydrotalcite was obtained after washing and vacuum drying.

[0045] AA2: Add 5g of modified hydrotalcite and toluene to a nitrogen-protected reactor, stir evenly, then add 1.8g of ferrocene methanol and 0.1g of potassium hydroxide to the system. After the addition is complete, turn on the heating until the temperature in the reactor reaches 75°C. After keeping warm and stirring for 6h, separate the solid material by centrifugation, wash with water, and dry to obtain an inorganic modified filler.

[0046] The inorganic modified filler was analyzed by infrared spectroscopy using a Bruker TENSOR-II Fourier transform infrared spectrometer. Figure 2 As shown by Figure 2 It can be seen that in the infrared spectrum of inorganic modified fillers, 1269cm -1 The absorption peak of C-Si appears at 1055cm -1 The absorption peak of ether bond COC appears at 1026 cm -1 The absorption peak of Si-O appears at 3080cm -1 The absorption peak of CH on the cyclopentadienyl ring appears at 1198 cm -1 The absorption peak that appears at is the characteristic absorption peak of monosubstituted ferrocenyl.

[0047] It can be inferred that the principle of the above scheme is: the surface of hydrotalcite contains a large number of hydroxyl groups. After modification with chloromethyldichloromethylsilane, a modified hydrotalcite containing halogen functional groups on the surface is obtained. Under the action of potassium hydroxide, the halogen functional groups can further react with the hydroxyl groups in the ferrocenylmethanol structure, thereby modifying the ferrocenylmethanol on the surface of the hydrotalcite to obtain an inorganic modified filler.

[0048] Example 1

[0049] Production of plant fiber fabrics

[0050] (i) Weaving 60 cotton fibers and 40 polyester fibers into yarns through a spinning machine to obtain cotton fiber yarns and polyester fiber yarns respectively;

[0051] (ii) 80D cotton fiber yarn and 40D polyester fiber yarn are firstly network compounded, and then twisted under the condition of twisting degree of 450T / M and S direction, and then warped by slitting, the warping speed is 150r / min, and the warp yarn is formed;

[0052] (III): 120D cotton fiber yarn and 80D polyester fiber yarn are first network compounded and then twisted under the condition of twist degree of 540T / M and S direction, and then warped by slitting, the warping speed is 200r / min, and the heald is transferred to form the weft yarn;

[0053] (IV): placing the warp yarn and the weft yarn on a jet machine for weaving, sending the woven fabric into a dryer for drying and shaping, and setting the drying temperature to 70°C to obtain the dried and shaped fabric;

[0054] (V): 5 g of composite flame retardant additive, 4 g of inorganic modified filler, 1 g of antioxidant 1010, 2 g of sodium dodecylbenzene sulfonate and 40 g of water were added into a blender, the temperature was raised to 35° C., and the mixture was stirred at a stirring rate of 200 r / min for 1 h to obtain a flame retardant finishing liquid;

[0055] (VI): The dried and shaped fabric is placed in a flame retardant finishing liquid, with a bath ratio of 1:30, and is padded and finished at 40°C for 30 minutes, and then dried at 60°C for 5 hours to obtain a plant fiber fabric.

[0056] Example 2

[0057] Production of plant fiber fabrics

[0058] (i) Weaving 70 cotton fibers and 50 polyester fibers into yarns through a spinning machine to obtain cotton fiber yarns and polyester fiber yarns respectively;

[0059] (ii) 90D cotton fiber yarn and 50D polyester fiber yarn are firstly network compounded, and then twisted under the condition of twist degree of 500T / M and S direction, and then warped by slitting, the warping speed is 200r / min, and the warp is formed;

[0060] (III): 140D cotton fiber yarn and 90D polyester fiber yarn are first network compounded and then twisted under the condition of twisting degree of 580T / M and S direction, and then warped by slitting, the warping speed is 220r / min, and the heald is transferred to form the weft yarn;

[0061] (IV): placing the warp yarn and the weft yarn on a jet machine for weaving, sending the woven fabric into a dryer for drying and shaping, and setting the drying temperature to 80°C to obtain the dried and shaped fabric;

[0062] (V): 6 g of composite flame retardant additive, 6 g of inorganic modified filler, 1.5 g of antioxidant 1010, 3 g of sodium dodecylbenzene sulfonate and 50 g of water were added into a blender, the temperature was raised to 40° C., and the mixture was stirred at a stirring rate of 300 r / min for 1.5 h to obtain a flame retardant finishing liquid;

[0063] (VI): The dried and shaped fabric is placed in a flame retardant finishing liquid, with a bath ratio of 1:35, and is padded and finished at 45°C for 40 minutes, and then dried at 70°C for 8 hours to obtain a plant fiber fabric.

[0064] Example 3

[0065] Production of plant fiber fabrics

[0066] (i) Weaving 80 cotton fibers and 60 polyester fibers into yarns through a spinning machine to obtain cotton fiber yarns and polyester fiber yarns respectively;

[0067] (ii) 100D cotton fiber yarn and 60D polyester fiber yarn are firstly network compounded, and then twisted under the condition of twist degree of 550T / M and S direction, and then warped by slitting, the warping speed is 250r / min, and the warp is formed;

[0068] (III): 160D cotton fiber yarn and 100D polyester fiber yarn are first network compounded and then twisted under the condition of twisting degree of 620T / M and S direction, and then warped by slitting, the warping speed is 240r / min, and the heald is transferred to form the weft yarn;

[0069] (IV): placing the warp yarn and the weft yarn on a jet machine for weaving, sending the woven fabric into a dryer for drying and shaping, and setting the drying temperature to 90° C. to obtain the dried and shaped fabric;

[0070] (V): 7 g of composite flame retardant additive, 8 g of inorganic modified filler, 2 g of antioxidant 1010, 4 g of sodium dodecylbenzene sulfonate and 60 g of water were added into a blender, the temperature was raised to 45° C., and the mixture was stirred at a stirring rate of 400 r / min for 2 h to obtain a flame retardant finishing liquid;

[0071] (VI): The dried and shaped fabric is placed in a flame retardant finishing liquid at a bath ratio of 1:40, and is padded and finished at 50°C for 50 minutes, and then dried at 80°C for 10 hours to obtain a plant fiber fabric.

[0072] Comparative Example 1

[0073] Production of plant fiber fabrics

[0074] (i) Weaving 70 cotton fibers and 50 polyester fibers into yarns through a spinning machine to obtain cotton fiber yarns and polyester fiber yarns respectively;

[0075] (ii) 90D cotton fiber yarn and 50D polyester fiber yarn are firstly network compounded, and then twisted under the condition of twist degree of 500T / M and S direction, and then warped by slitting, the warping speed is 200r / min, and the warp is formed;

[0076] (III): 140D cotton fiber yarn and 90D polyester fiber yarn are first network compounded and then twisted under the condition of twisting degree of 580T / M and S direction, and then warped by slitting, the warping speed is 220r / min, and the heald is transferred to form the weft yarn;

[0077] (IV): placing the warp yarn and the weft yarn on a jet machine for weaving, sending the woven fabric into a dryer for drying and shaping, and setting the drying temperature to 80°C to obtain the dried and shaped fabric;

[0078] (V): 6 g of composite flame retardant additive, 1.5 g of antioxidant 1010, 3 g of sodium dodecylbenzene sulfonate and 50 g of water were added into a blender, the temperature was raised to 40° C., and the mixture was stirred at a stirring rate of 300 r / min for 1.5 h to obtain a flame retardant finishing liquid;

[0079] (VI): The dried and shaped fabric is placed in a flame retardant finishing liquid, with a bath ratio of 1:35, and is padded and finished at 45°C for 40 minutes, and then dried at 70°C for 8 hours to obtain a plant fiber fabric.

[0080] Comparative Example 2

[0081] Production of plant fiber fabrics

[0082] (i) Weaving 70 cotton fibers and 50 polyester fibers into yarns through a spinning machine to obtain cotton fiber yarns and polyester fiber yarns respectively;

[0083] (ii) 90D cotton fiber yarn and 50D polyester fiber yarn are firstly network compounded, and then twisted under the condition of twist degree of 500T / M and S direction, and then warped by slitting, the warping speed is 200r / min, and the warp is formed;

[0084] (III): 140D cotton fiber yarn and 90D polyester fiber yarn are first network compounded and then twisted under the condition of twisting degree of 580T / M and S direction, and then warped by slitting, the warping speed is 220r / min, and the heald is transferred to form the weft yarn;

[0085] (IV): placing the warp yarn and the weft yarn on a jet machine for weaving, sending the woven fabric into a dryer for drying and shaping, and setting the drying temperature to 80°C to obtain the dried and shaped fabric;

[0086] (V): 6 g of inorganic modified filler, 1.5 g of antioxidant 1010, 3 g of sodium dodecylbenzene sulfonate and 50 g of water were added into a blender, the temperature was raised to 40° C., and the mixture was stirred at a stirring rate of 300 r / min for 1.5 h to obtain a flame retardant finishing liquid;

[0087] (VI): The dried and shaped fabric is placed in a flame retardant finishing liquid, with a bath ratio of 1:35, and is padded and finished at 45°C for 40 minutes, and then dried at 70°C for 8 hours to obtain a plant fiber fabric.

[0088] Comparative Example 3

[0089] Production of plant fiber fabrics

[0090] (i) Weaving 70 cotton fibers and 50 polyester fibers into yarns through a spinning machine to obtain cotton fiber yarns and polyester fiber yarns respectively;

[0091] (ii) 90D cotton fiber yarn and 50D polyester fiber yarn are firstly network compounded, and then twisted under the condition of twist degree of 500T / M and S direction, and then warped by slitting, the warping speed is 200r / min, and the warp is formed;

[0092] (III): 140D cotton fiber yarn and 90D polyester fiber yarn are first network compounded and then twisted under the condition of twisting degree of 580T / M and S direction, and then warped by slitting, the warping speed is 220r / min, and the heald is transferred to form the weft yarn;

[0093] (IV): placing the warp yarn and the weft yarn on a jet machine for weaving, sending the woven fabric into a dryer for drying and shaping, and setting the drying temperature to 80°C to obtain the dried and shaped fabric;

[0094] (V): 6 g of composite flame retardant additive, 4 g of hydrotalcite, 2 g of ferrocene methanol, 1.5 g of antioxidant 1010, 3 g of sodium dodecylbenzene sulfonate and 50 g of water were added into a blender, the temperature was raised to 40° C., and the mixture was stirred at a stirring rate of 300 r / min for 1.5 h to obtain a flame retardant finishing liquid;

[0095] (VI): The dried and shaped fabric is placed in a flame retardant finishing liquid, with a bath ratio of 1:35, and is padded and finished at 45°C for 40 minutes, and then dried at 70°C for 8 hours to obtain a plant fiber fabric.

[0096] Comparative Example 4

[0097] Production of plant fiber fabrics

[0098] (i) Weaving 70 cotton fibers and 50 polyester fibers into yarns through a spinning machine to obtain cotton fiber yarns and polyester fiber yarns respectively;

[0099] (ii) 90D cotton fiber yarn and 50D polyester fiber yarn are firstly network compounded, and then twisted under the condition of twist degree of 500T / M and S direction, and then warped by slitting, the warping speed is 200r / min, and the warp is formed;

[0100] (III): 140D cotton fiber yarn and 90D polyester fiber yarn are first network compounded and then twisted under the condition of twisting degree of 580T / M and S direction, and then warped by slitting, the warping speed is 220r / min, and the heald is transferred to form the weft yarn;

[0101] (IV) placing the warp yarn and the weft yarn on a jet machine for weaving, sending the woven fabric into a dryer for drying and shaping, and setting the drying temperature to 80° C. to obtain a plant fiber fabric.

[0102] Performance Testing

[0103] ① According to GB / T 5454-1997 "Textile Combustion Performance Test Oxygen Index Method", the combustion performance of the plant fiber fabrics prepared in Examples 1 to 3 of the present invention and Comparative Examples 1 to 4 was tested. The specific test results are shown in the following table:

[0104] Limiting oxygen index (%) Example 1 32.6 Example 2 33.8 Example 3 32.4 Comparative Example 1 26.7 Comparative Example 2 25.9 Comparative Example 3 28.3 Comparative Example 4 20.5

[0105] From the test results in the above table, it can be seen that the limiting oxygen index of the plant fiber fabrics prepared in Examples 1 to 3 is greater than 32%, and has excellent flame retardant properties; the plant fiber fabric prepared in Comparative Example 1 is added with a composite flame retardant additive, which can produce an intumescent flame retardant effect, but no inorganic modified filler is added, and the organic-inorganic dual synergistic flame retardant effect cannot be exerted, so the flame retardant performance is not as good as that of the embodiment; the plant fiber fabric prepared in Comparative Example 2 is only added with an inorganic modified filler, and no composite flame retardant additive is added. Therefore, the plant fiber fabric cannot form a continuous and dense carbon layer structure during the combustion process, and cannot It can produce an expanding flame retardant effect, so the flame retardant performance of the plant fiber fabric is average; the plant fiber fabric prepared in Comparative Example 3 is added with a composite flame retardant additive, hydrotalcite and ferrocene methanol. Compared with the embodiment, the flame retardant performance of the fabric is average. It is speculated that this may be because the hydrotalcite has not been organically modified, and it has agglomerated in the matrix, and ferrocene methanol may have migrated in the matrix, resulting in a decrease in the flame retardant performance of the fabric; the plant fiber fabric prepared in Comparative Example 4 has neither a composite flame retardant additive nor an inorganic modified filler added, so the flame retardant performance of the fabric is the worst.

[0106] ② The plant fiber fabrics prepared in Examples 1 to 3 of the present invention and Comparative Examples 1 to 4 were made into samples with a specification of 10 cm × 10 cm × 0.5 mm. A low oxygen standard cone calorimeter produced by FTT of the United Kingdom was used. The ISO-5660-1 experimental standard was adopted. The samples were wrapped in aluminum foil boxes. The thermal radiation power was 35 kW / m 2 , the total smoke volume of the test sample, the specific test results are shown in the following table:

[0107]

[0108] From the test results in the above table, it can be seen that the total smoke generation of the plant fiber fabrics prepared in Examples 1 to 3 is small and has excellent smoke suppression performance; the plant fiber fabric prepared in Comparative Example 1 does not add inorganic modified fillers, and can only use composite flame retardant additives for smoke suppression, so the total smoke generation is high, and the smoke suppression performance is not as good as the embodiment; the plant fiber fabric prepared in Comparative Example 2 only adds inorganic modified fillers, which can play a certain smoke suppression role during combustion, but does not add composite flame retardant additives, and cannot play an organic-inorganic dual synergistic flame retardant role. Compared with the embodiment, the smoke suppression performance of the fabric is average; the plant fiber fabric prepared in Comparative Example 3 adds composite flame retardant additives, hydrotalcite and ferrocene methanol. Compared with the embodiment, the smoke suppression performance of the fabric is average. It is speculated that this may be because the hydrotalcite agglomerates in the matrix and the ferrocene methanol migrates in the matrix, resulting in a decrease in the smoke suppression performance of the fabric; the plant fiber fabric prepared in Comparative Example 4 does not add composite flame retardant additives and inorganic modified fillers, and the total smoke generation of the fabric is the highest, so the smoke suppression performance of the fabric is the worst.

[0109] The above contents are merely examples and explanations of the concept of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A production process of functional plant fiber fabrics, It is characterized in that The following steps are involved: (i) Weaving 60 to 80 cotton fibers and 40 to 60 polyester fibers into yarns through a spinning machine to obtain cotton fiber yarns and polyester fiber yarns; (ii) 80-100D cotton fiber yarn and 40-60D polyester fiber yarn are firstly network compounded, and then twisted under the condition of twisting degree of 450-550T / M and S direction, and then warped by slitting, the warping speed is 150-250r / min, and the warp is transmitted to form warp yarn; (III) 120-160D cotton fiber yarn and 80-100D polyester fiber yarn are firstly network compounded and then twisted under the condition of twisting degree of 540-620T / M and S direction, and then warped by slitting, the warping speed is 200-240r / min, and the heald is transmitted to form the weft yarn; (IV): placing the warp yarn and the weft yarn on a jet machine for weaving, sending the woven fabric into a dryer for drying and shaping, and setting the drying temperature to 70-90° C. to obtain the dried and shaped fabric; (V): Add 5 to 7 parts by weight of a composite flame retardant additive, 4 to 8 parts of an inorganic modified filler, 1 to 2 parts of an antioxidant 1010, 2 to 4 parts of sodium dodecylbenzene sulfonate and 40 to 60 parts of water into a mixer, raise the temperature to 35 to 45° C., and stir at a stirring rate of 200 to 400 r / min for 1 to 2 hours to obtain a flame retardant finishing liquid; (Six): Place the dried and shaped fabric in a flame retardant finishing liquid, according to a bath ratio of 1:30-40, and pad and finish at 40-50°C for 30-50 minutes, and then dry at 60-80°C for 5-10 hours to obtain a plant fiber fabric.

2. A process for producing a functional plant fiber fabric according to claim 1, It is characterized in that The preparation process of the composite flame retardant additive comprises the following steps: A1: Mechanically stir the solution of Bletilla striata polysaccharide, 6-chloronicotinic acid and dimethyl sulfoxide evenly, add an acid binding agent, raise the temperature to 70-80°C, keep the temperature for 3-5 hours, and discharge the material to obtain modified Bletilla striata polysaccharide; A2: Under the action of an esterification catalyst, the modified Bletilla striata polysaccharide, hydroxyethylidene diphosphonic acid and N,N-dimethylformamide are stirred and mixed, and heating is turned on. After the system temperature reaches 100-110°C, stirring is carried out at a constant temperature for 2-6 hours, and the material is discharged after cooling to room temperature to obtain a composite flame retardant additive.

3. A process for producing a functional plant fiber fabric according to claim 2, It is characterized in that In step A1, the mass ratio of the bletilla striata polysaccharide to 6-chloronicotinic acid is 1:0.05-0.

2.

4. A process for producing a functional plant fiber fabric according to claim 2, It is characterized in that In step A1, the acid binding agent is any one of triethylamine or pyridine.

5. A process for producing a functional plant fiber fabric according to claim 2, It is characterized in that In step A2, the esterification catalyst is a complex of N-hydroxysuccinimide and dicyclohexylcarbodiimide, with a mass ratio of 0.2 to 0.5:

1.

6. The process for producing a functional plant fiber fabric according to claim 1, It is characterized in that The preparation process of the inorganic modified filler comprises the following steps: AA1: Under the action of a promoter, hydrotalcite and chloromethyldichloromethylsilane are placed in a mixed solution of ethanol and deionized water, and ultrasonicated to form a uniform mixed solution. The system temperature is raised to 60-70°C under stirring conditions and kept warm for 4-6 hours to obtain modified hydrotalcite; AA2: Add modified hydrotalcite, ferrocene methanol and toluene into a reaction kettle, stir evenly, then add potassium hydroxide, keep warm and stir at 70-80°C for 4-8h to obtain an inorganic modified filler.

7. A process for producing a functional plant fiber fabric according to claim 6, It is characterized in that In step AA1, the average particle size of the hydrotalcite is 2 μm.

8. A process for producing a functional plant fiber fabric according to claim 6, It is characterized in that In step AA1, the volume ratio of ethanol to deionized water is 1:0.5-1.

5.

9. The process for producing a functional plant fiber fabric according to claim 6, It is characterized in that In step AA1, the accelerator is any one of sodium carbonate, potassium carbonate or sodium bicarbonate.

10. A functional plant fiber fabric, It is characterized in that The method is manufactured by the manufacturing process as claimed in claim 1.

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