CN114790586A - Modified nylon double-layer flannelette and preparation method thereof - Google Patents
Modified nylon double-layer flannelette and preparation method thereof Download PDFInfo
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- CN114790586A CN114790586A CN202210373693.3A CN202210373693A CN114790586A CN 114790586 A CN114790586 A CN 114790586A CN 202210373693 A CN202210373693 A CN 202210373693A CN 114790586 A CN114790586 A CN 114790586A
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/90—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyamides
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
Abstract
The application relates to the technical field of nylon fabric manufacturing, and particularly discloses modified nylon double-layer down-filled cloth and a preparation method thereof. The flannelette is obtained by sequentially performing spooling, warping, slashing, weaving and dyeing and finishing on modified nylon fibers, wherein the modified nylon fibers are prepared from nylon raw materials through a melt spinning process, and the nylon raw materials comprise the following components in parts by weight: 60-80 parts of caprolactam, 16-20 parts of activator carrier particles and 2-4 parts of a cocatalyst, wherein the activator carrier particles are adsorbent particles adsorbing caprolactam sodium. The caprolactam sodium of this application has formed the transition layer between the fuse-element of activator carrier particle and caprolactam to increased the compatibility between activator carrier particle and the nylon fiber base member, reduced the inside crack quantity that produces under high temperature environment of nylon fiber, improved the mechanical properties of filling the cotton flannel under high temperature environment.
Description
Technical Field
The application relates to the technical field of nylon fabric manufacturing, in particular to modified nylon double-layer down-filled cloth and a preparation method thereof.
Background
A fleece is a fabric having a plush surface and generally comprises two or more fabric plies. In order to make the flocked fabric more durable, the fibers used to weave the flocked fabric often contain a certain proportion of filler.
In the related technology, nylon double-layer flannelette is obtained by nylon fiber through spinning, spooling, warping, slashing, weaving and dyeing and finishing in sequence, and the preparation method of the nylon fiber comprises the following steps: (1) mixing caprolactam and a filler uniformly, heating the mixture to be molten, adding a hot sodium hydroxide solution into the melt, continuing stirring and vacuumizing the mixture until the mixture is boiled, adding a cocatalyst into the boiling system, and fully cooling the mixture to obtain a nylon matrix; in the step, the filler is fly ash, and the cocatalyst is polyisocyanate; (2) and (3) spinning and forming by taking a nylon matrix as a raw material to obtain the nylon fiber.
In view of the above related technologies, the inventor believes that, in the related technologies, the fly ash is added to the nylon fiber as the filler, which improves the mechanical property of the down-filled fabric and improves the durability of the nylon fiber at normal temperature, but the thermal deformation performance of the matrix of the nylon fiber and the fly ash is greatly different, resulting in poor compatibility of the matrix of the nylon fiber and the fly ash. When the environmental temperature rises, the number of defects between the matrix of the nylon fiber and the fly ash particles is increased, and the mechanical property of the down-filled cloth is influenced.
Disclosure of Invention
In the related art, when the environmental temperature rises, the number of defects between the nylon fiber matrix and the fly ash is increased, and the mechanical property of the flannelette is influenced. In order to overcome the defect, the application provides a modified nylon double-layer suede cloth and a preparation method thereof.
In a first aspect, the application provides a modified nylon double-layer down-filled cloth, which adopts the following technical scheme:
the modified nylon double-layer flannelette is obtained by sequentially performing spooling, warping, slashing, weaving and dyeing and finishing on modified nylon fibers, wherein the modified nylon fibers are prepared from a nylon raw material through a melt spinning process, and the nylon raw material comprises the following components in parts by weight: 60-80 parts of caprolactam, 16-20 parts of activator carrier particles and 2-4 parts of a cocatalyst, wherein the activator carrier particles are adsorbent particles adsorbing caprolactam sodium.
By adopting the technical scheme, the activator carrier particles are used for replacing the filler in the related technology, the activator carrier particles can release sodium caprolactam in the melt of the nylon raw material, the sodium caprolactam forms a transition layer between the activator carrier particles and the melt of the caprolactam, and the transition layer is formed together with the melt of the nylon raw material, so that the modified nylon fiber is finally obtained. The transition layer formed by the sodium caprolactam improves the compatibility between the activator carrier particles and the nylon fiber matrix, reduces the number of defects generated in the temperature rise process of the nylon fiber, and is beneficial to improving the mechanical property of the flocked fabric in a high-temperature environment.
Preferably, the nylon raw material comprises the following components in parts by weight: 65-75 parts of caprolactam, 17-19 parts of activator carrier particles and 2.5-3.5 parts of cocatalyst.
By adopting the technical scheme, the raw material proportion of the nylon raw material is optimized, and the mechanical property of the cotton flannel in a high-temperature environment is improved.
Preferably, the modified nylon fiber is prepared by the following method:
(1) uniformly mixing caprolactam and activator carrier particles, and heating to melt to obtain a prefabricated melt;
(2) carrying out heat preservation and vacuum pumping on the prefabricated melt, then uniformly mixing the prefabricated melt and a cocatalyst, and uniformly stirring the mixture in a nitrogen atmosphere to obtain a nylon raw material;
(3) the modified nylon fiber is obtained by spinning and molding the nylon raw material.
By adopting the technical scheme, the caprolactam and the activator carrier particles are mixed firstly, so that the activator carrier particles are fully heated in the melt of the caprolactam, and the activator carrier particles are favorable for releasing sodium caprolactam. After the prefabricated melt is obtained, the cocatalyst is added into the prefabricated melt, the nylon raw material is obtained with the assistance of the cocatalyst, and finally the modified nylon fiber is obtained through spinning molding.
Preferably, the activator-support particles are prepared as follows:
(1) dissolving caprolactam and sodium hydroxide in ethanol, and heating and mixing the obtained product under the water bath heating condition for a period of time to obtain a caprolactam sodium ethanol solution;
(2) uniformly mixing a caprolactam sodium ethanol solution and an adsorbent dispersion solution, standing the mixture for a period of time, and then performing reduced pressure evaporation to obtain a solid product, namely an activating agent carrier particle; in this step, the adsorbent dispersion liquid is a dispersion liquid of adsorbent particles in ethanol.
By adopting the technical scheme, the caprolactam is firstly reacted with the sodium hydroxide in the ethanol system to obtain the sodium caprolactam ethanol solution, then the sodium caprolactam ethanol solution is uniformly mixed with the adsorbent dispersion liquid, and the ethanol is removed by reduced pressure evaporation, so that the sodium caprolactam permeates into the surfaces of the adsorbent particles to obtain the activator carrier particles.
Preferably, in the step (1) of preparing the activator-support particles, the temperature of the water bath is 40 to 50 ℃.
By adopting the technical scheme, the caprolactam and the sodium hydroxide are both solid at normal temperature, the caprolactam and the sodium hydroxide are not easy to directly react, and even if the caprolactam is melted, the caprolactam and the sodium hydroxide are difficult to fully contact in a short time, the caprolactam still belongs to heterogeneous reaction, and the reaction rate is slow. According to the method, the ethanol is used as a solvent of caprolactam and sodium hydroxide, and heterogeneous reaction between the caprolactam and the sodium hydroxide is converted into homogeneous reaction, so that the caprolactam and the sodium hydroxide can be fully contacted, and the ethanol also has a protection effect on newly generated caprolactam sodium, so that the oxidation loss of the caprolactam sodium is reduced. On the basis, the temperature is set below the melting point of caprolactam, and is preferably 40-50 ℃, so that the energy consumption for preparing sodium caprolactam is reduced, and the cost for producing modified nylon fibers and flannelette is saved.
Preferably, in the step (1) of preparing the activator-support particles, the heating time in the water bath is 6-8 min.
By adopting the technical scheme, the heating time is further optimized under the condition that the temperature is 40-50 ℃, and the reduction of energy consumption for preparing caprolactam sodium is facilitated.
Preferably, the adsorbent dispersion is prepared as follows:
(1) performing steam curing on the silicate mixed powder, and then uniformly mixing the silicate mixed powder subjected to steam curing, ethanol and a suspension aid to obtain a silicate powder suspension; in the step, the silicate mixed powder comprises silicate cement and fly ash;
(2) and (3) freeze-drying the silicate powder suspension to obtain the adsorbent dispersion liquid.
By adopting the technical scheme, steam curing is carried out on the mixture of the portland cement and the fly ash, the surface of the fly ash is modified by utilizing the alkalinity of the portland cement and the pozzolanic reaction, the roughness of the surface of the fly ash is improved, and the number of attachment sites on the surface of the fly ash is increased. After the fly ash is mixed with cement and steamed, a silicate hydrate film is generated on the surface of the fly ash. In the freeze drying process, the water in the silicate hydrate film is absorbed by ethanol or is directly sublimated into gas state, so that a silicate porous layer is formed on the surface of the fly ash, and the adsorption performance of the fly ash is further improved.
Preferably, the weight ratio of the portland cement to the fly ash in the silicate mixed powder is 1: (4.2-4.6).
By adopting the technical scheme, the proportion of the portland cement and the fly ash is optimized, and when the content of the portland cement is too high, the cohesiveness of a silicate hydrate film on the surface of the fly ash is improved, so that the silicate mixed powder is agglomerated and solidified, and the adsorption effect of the adsorbent particles on the caprolactam sodium is influenced. When the content of the portland cement is too low, the surface roughness of the fly ash is insufficient, it is difficult to generate sufficient adsorption effect on a portland cement film, formation of a porous layer of the portland cement is not facilitated,
preferably, the silicate mixed powder further comprises zeolite powder.
By adopting the technical scheme, the zeolite powder has a pore structure, so that a product of a reaction of the portland cement and water can be adsorbed to the inside. Under the combined action of ethanol and freeze drying, cement hydration products absorbed by zeolite powder lose moisture and form a new porous silicate structure in the zeolite, and the new porous silicate structure further refines the original pores of the zeolite and is beneficial to absorbing and storing caprolactam sodium.
In a second aspect, the application provides a preparation method of a modified nylon double-layer suede cloth, which adopts the following technical scheme.
A preparation method of modified nylon double-layer suede cloth comprises the following steps:
(1) and (3) spooling: winding the modified nylon fiber by using winding equipment;
(2) warping: warping the modified nylon fiber subjected to the spooling treatment by using warping equipment to obtain warp and weft;
(3) sizing: sizing the warp yarns and the weft yarns in a sizing material;
(4) weaving: weaving by using the warp and weft after sizing as raw materials to obtain grey cloth;
(5) dyeing and finishing: and dyeing, drying by hot air, baking and shaping, soaping, washing and drying for the second time are sequentially carried out on the grey cloth, so that the modified nylon double-layer cotton flannel is obtained.
By adopting the technical scheme, the method disclosed by the application prepares the modified nylon fiber into the nylon double-layer velvet filling fabric through multiple processes of spooling, warping, slashing, weaving, dyeing and finishing and the like in sequence.
In summary, the present application has the following beneficial effects:
1. the activator support particles of the present application, while acting as sodium caprolactam support, also act as a filler. The caprolactam sodium plays a role in activation and simultaneously forms a transition layer between the activator carrier particles and the nylon fiber matrix, so that the compatibility between the activator carrier particles and the nylon fiber matrix is improved, the number of defects generated in the temperature rise process of the nylon fiber is reduced, and the mechanical property of the flocked fabric in a high-temperature environment is improved.
2. In the application, ethanol solution of sodium caprolactam and adsorbent dispersion liquid are preferably used as raw material liquid for preparing the activating agent carrier particles, sodium caprolactam is deposited on the surfaces of the adsorbent particles through the adsorption effect of the adsorbent particles on the sodium caprolactam, and then the adsorbent carrier particles are obtained through reduced pressure evaporation.
3. According to the method, the modified nylon fiber containing the activator carrier particles is prepared into the modified nylon double-layer cotton flannel filling fabric through multiple processes of spooling, warping, slashing, weaving, dyeing and finishing and the like in sequence, and compared with the related technology, the mechanical property of the cotton flannel filling fabric in a high-temperature environment is further improved.
Detailed Description
The present application will be described in further detail with reference to examples, preparations and comparative examples, and all of the starting materials of the present application are commercially available.
Preparation example of modified Nylon fiber
Preparation example 1 is described below as an example.
Preparation example 1
The preparation example provides a preparation method of modified nylon fibers, which comprises the following steps:
(1) uniformly mixing 60kg of caprolactam and 16kg of activator carrier particles, and heating the mixture to be molten under the condition of a water bath at 85 ℃ to obtain a prefabricated melt;
(2) carrying out heat preservation and vacuum pumping on the prefabricated melt, then uniformly mixing the prefabricated melt with 2kg of cocatalyst, and stirring the mixture for 15min in a nitrogen atmosphere to obtain a nylon raw material;
(3) the modified nylon fiber is obtained by taking a nylon raw material as a raw material and carrying out spinning forming in melt spinning equipment.
In this preparation example, the activator-support particles were prepared as follows:
(1) dissolving 20kg of caprolactam and 4.8kg of sodium hydroxide in 30kg of ethanol, heating and mixing the obtained product for 5min under the water bath heating condition of 35 ℃, and filtering out solid residues to obtain a caprolactam sodium ethanol solution;
(2) and (2) uniformly mixing the caprolactam sodium ethanol solution and 25kg of adsorbent dispersion liquid, standing the mixture for 2 hours, and then performing reduced pressure evaporation to obtain a solid product, namely the activator carrier particle.
In this preparation example, the adsorbent dispersion was prepared as follows:
(1) steam curing 40kg of silicate mixed powder by using water vapor with the temperature of 80 ℃ and the pressure of 0.8MPa, taking out the silicate mixed powder subjected to steam curing from a steam curing environment after 3h, and uniformly mixing the silicate mixed powder with 60kg of ethanol and 5kg of suspension auxiliary agent to obtain silicate powder suspension; in the step, the weight ratio of the portland cement to the fly ash in the silicate mixed powder is 1: 4.0, the suspension auxiliary agent is methyl cellulose;
(2) freeze-drying the silicate powder suspension at-40 deg.C, and removing water to obtain adsorbent dispersion.
As shown in Table 1, the preparation examples 1 to 5 are different in the raw material ratio of the modified nylon fiber.
TABLE 1
| Sample(s) | Caprolactam/kg | Activator support particles/kg | Cocatalyst per kg |
| Preparation example 1 | 60 | 16 | 2 |
| Preparation example 2 | 65 | 17 | 2.5 |
| Preparation example 3 | 70 | 18 | 3 |
| Preparation example 4 | 75 | 19 | 3.5 |
| Preparation example 5 | 80 | 20 | 4 |
Preparation examples 6 to 9
As shown in table 2, preparations 6 to 9 differ from preparation 3 in that the temperature of water bath heating is different in the step (1) of preparing the activator-support particles.
TABLE 2
| Sample(s) | Preparation example 3 | Preparation example 6 | Preparation example 7 | Preparation example 8 | Preparation example 9 |
| Temperature/. degree.C | 35 | 40 | 45 | 50 | 55 |
Preparation examples 10 to 13
As shown in Table 3, preparations 10 to 13 were different from preparation 7 in that the time of heating in a water bath was different in the step (1) of preparing the activator-supporting particles.
TABLE 3
| Sample(s) | Preparation example 7 | Preparation example 10 | Preparation example 11 | Preparation example 12 | Preparation example 13 |
| Heating time/min | 5 | 6 | 7 | 8 | 9 |
Preparation examples 14 to 17
As shown in Table 4, production examples 14 to 17 were different from production example 11 in the weight ratio of portland cement to fly ash in the portland mixed powder.
TABLE 3
| Sample(s) | Preparation example 11 | Preparation example 14 | Preparation example 15 | Preparation example 16 | Preparation example 17 |
| Portland cement: fly ash | 1:4.0 | 1:4.2 | 1:4.4 | 1:4.6 | 1:4.8 |
Preparation example 18
The difference between the preparation example and the preparation example 15 is that the silicate mixed powder is prepared by mixing silicate cement, fly ash and zeolite powder according to the weight ratio of 1:4.4: 1.
Examples
Examples 1 to 5
The following description will be given by taking example 1 as an example.
Example 1
The modified nylon double-layer flannelette is prepared according to the following steps:
(1) spooling: placing the modified nylon fiber yarn roll on a winding machine for winding processing; in the step, the winding speed is 350m/min, the mass of a tension ring is 10g, the winding density of a bobbin is 0.4g/cm3, and the winding temperature is 20 ℃;
(2) warping: warping the modified nylon fiber subjected to the spooling treatment by using warping equipment to obtain warp and weft; in the step, the warping speed is 250m/min, and the winding density is 0.55g/cm 3;
(3) sizing: sizing the warp yarns and the weft yarns in a sizing material; in the step, the slashing speed is 80m/min, and the temperature of a size box is 60 ℃;
(4) weaving: weaving by using the warp and weft after sizing as raw materials to obtain grey cloth; in the step, the speed of the loom is 500r/min, and the upper machine tension is 1800N;
(5) dyeing and finishing: dyeing, hot air drying, baking and shaping, soaping, washing and secondary drying are sequentially carried out on the grey cloth to obtain modified nylon double-layer cotton flannel; in the step, the dyeing temperature is 100 ℃, the dyeing time is 80min, the drying temperature is 70 ℃, the drying time is 5min, the baking and shaping temperature is 150 ℃, the baking and shaping time is 90s, the soaping temperature is 70 ℃, and the secondary drying temperature is 70 ℃.
As shown in Table 5, examples 1 to 18 differ mainly in the preparation examples of the modified nylon fibers
TABLE 5
Comparative example
Comparative example 1
The nylon double-layer flannelette is prepared by the following steps:
(1) and (3) spooling: placing the yarn roll of the nylon fiber on a winding machine for winding processing; in the step, the winding speed is 350m/min, the mass of the tension ring is 10g, the winding density of the bobbin is 0.4g/cm3, and the winding temperature is 20 ℃;
(2) warping: warping the modified nylon fiber subjected to spooling treatment by using warping equipment to obtain warp and weft; in the step, the warping speed is 250m/min, and the winding density is 0.55g/cm 3;
(3) sizing: sizing the warp yarns and the weft yarns in a sizing material; in the step, the slashing speed is 80m/min, and the temperature of a size box is 60 ℃;
(4) weaving: weaving by using the warp yarns and the weft yarns after sizing as raw materials to obtain grey cloth; in the step, the speed of the loom is 500r/min, and the upper machine tension is 1800N;
(5) dyeing and finishing: dyeing, hot air drying, baking and shaping, soaping, washing and secondary drying are sequentially carried out on the grey cloth to obtain modified nylon double-layer cotton flannel; in the step, the dyeing temperature is 100 ℃, the dyeing time is 80min, the drying temperature is 70 ℃, the drying time is 5min, the baking and shaping temperature is 150 ℃, the baking and shaping time is 90s, the soaping temperature is 70 ℃, and the secondary drying temperature is 70 ℃.
The nylon fiber of this comparative example was prepared as follows:
(1) uniformly mixing 60kg of caprolactam and 15kg of fly ash, heating until the caprolactam is molten, adding 4kg of hot sodium hydroxide solution with the temperature of 65kg into the melt, continuously stirring and vacuumizing until the mixture is boiled, adding a cocatalyst into the boiling system, and fully cooling to obtain a nylon matrix; in the step, the filler is fly ash, the cocatalyst is polyisocyanate with the average molecular weight of 650, and the mass fraction of sodium hydroxide in the hot sodium hydroxide solution is 8%;
(2) and carrying out melt spinning by taking a nylon matrix as a raw material to obtain the nylon fiber.
Comparative example 2
This comparative example differs from example 3 in that the activator-support particles in the raw material from which the modified nylon fiber was made were replaced with the same weight of fly ash.
Performance detection test method
The flannelette in each embodiment and the preparation example of the application is subjected to steam ironing by referring to GB/T38006-2019 so as to simulate the use condition of the flannelette in a high-temperature environment. During testing, the steam temperature is set to 180 ℃, the steam pressure is adjusted to 0.5MPa, the ironing plate pressure is adjusted to 40kPa, and the ironing time is set to 180 s.
After the steam ironing is finished, the breaking strength of the down-filled cloth is tested within 5min, the test method refers to GB/T3923.2-2013, and the test results are shown in Table 6.
TABLE 6
| Sample(s) | Breaking strength/N | Sample(s) | Breaking strength/N |
| Example 1 | 146.8 | Example 11 | 154.8 |
| Example 2 | 147.2 | Example 12 | 153.6 |
| Example 3 | 147.5 | Example 13 | 152.1 |
| Example 4 | 147.3 | Example 14 | 155.7 |
| Example 5 | 147.0 | Example 15 | 159.2 |
| Example 6 | 149.2 | Example 16 | 158.3 |
| Example 7 | 151.3 | Example 17 | 157.6 |
| Example 8 | 150.4 | Example 18 | 161.3 |
| Example 9 | 148.5 | Comparative example 1 | 86.8 |
| Example 10 | 152.2 | Comparative example 2 | 62.4 |
As can be seen by combining examples 1-5 and comparative example 1 and table 6, the breaking strength measured in examples 1-5 is higher than that measured in comparative example 1, which indicates that the sodium caprolactam released by the activator carrier particles forms a transition layer between the activator carrier particles and the melt of caprolactam while the activator carrier particles of the present application are used as a filler, thereby increasing the compatibility between the activator carrier particles and the nylon fiber matrix, reducing the number of cracks generated in the nylon fiber under high temperature environment, and increasing the breaking strength of the fleece-filled fabric.
Combining example 3 and comparative example 2 with table 6, it can be seen that example 3 measured a higher breaking strength than comparative example 2, indicating that comparative example 2 had poorer mechanical properties than example 3 because the formulated system did not contain ingredients capable of functioning as a filler when no activator support particles were added.
As can be seen by combining example 3 with examples 6-9, and by combining Table 6, the breaking strength measured in examples 6-8 is relatively high, indicating that heating a mixture of caprolactam and sodium hydroxide at 40-50 deg.C is more conducive to improving the mechanical properties of modified nylon fibers and flocked fabrics.
It can be seen by combining example 7 with examples 10-13 and table 6 that the breaking strength measured in examples 10-12 is relatively high, which indicates that heating a mixture of caprolactam and sodium hydroxide at 40-50 ℃ for 6-8min is more helpful to improve the mechanical properties of modified nylon fibers and flocked fabrics.
As can be seen by combining example 11 with examples 14-17 and Table 6, the fracture strength measured in examples 14-16 is relatively high, indicating that the weight ratio of portland cement to fly ash in the portland mixed powder is 1: (4.2-4.6), the mechanical properties of the modified nylon fiber and the flannelette are improved.
It can be seen from the combination of example 15 and example 18 and table 6 that the fracture strength measured in example 18 is higher than that in example 15, which indicates that a new porous silicate structure is formed inside the zeolite powder, and the new porous silicate structure further refines the original pores of the zeolite, and helps to absorb and store sodium caprolactam, so that the compatibility between the activator carrier particles and the nylon fiber matrix is increased, and the mechanical properties of the modified nylon fiber and the filled cloth are improved.
The specific embodiments are only for explaining the present application and are not limiting to the present application, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. The modified nylon double-layer cotton flannel is characterized in that the cotton flannel is obtained by sequentially performing spooling, warping, slashing, weaving and dyeing and finishing on modified nylon fibers, wherein the modified nylon fibers are prepared from nylon raw materials through a melt spinning process, and the nylon raw materials comprise the following components in parts by weight: 60-80 parts of caprolactam, 16-20 parts of activator carrier particles and 2-4 parts of a cocatalyst, wherein the activator carrier particles are adsorbent particles adsorbed with sodium caprolactam.
2. The modified nylon double-layer suede fabric as claimed in claim 1, wherein the nylon raw material comprises the following components in parts by weight: 65-75 parts of caprolactam, 17-19 parts of activator carrier particles and 2.5-3.5 parts of cocatalyst.
3. The modified nylon double-layer suede fabric as claimed in claim 1, wherein the modified nylon fiber is prepared according to the following method:
(1) uniformly mixing caprolactam and activator carrier particles, and heating to melt to obtain a prefabricated melt;
(2) carrying out heat preservation and vacuum pumping on the prefabricated melt, then uniformly mixing the prefabricated melt and a cocatalyst, and uniformly stirring the mixture in a nitrogen atmosphere to obtain a nylon raw material;
(3) the modified nylon fiber is obtained by spinning and molding the nylon raw material.
4. The modified nylon double-layer suede fabric of claim 1, wherein the activator support particles are prepared by the following method:
(1) dissolving caprolactam and sodium hydroxide in ethanol, and heating and mixing the obtained product under the water bath heating condition for a period of time to obtain a caprolactam sodium ethanol solution;
(2) uniformly mixing a caprolactam sodium ethanol solution and an adsorbent dispersion liquid, standing a mixture for a period of time, and then performing reduced pressure evaporation to obtain a solid product, namely an activator carrier particle; in this step, the adsorbent dispersion liquid is a dispersion liquid of adsorbent particles in ethanol.
5. The modified nylon double-layered suede fabric according to claim 4, wherein in the step (1) of preparing the activator support particles, the temperature of water bath heating is 40-50 ℃.
6. The modified nylon double-layer suede fabric as claimed in claim 5, wherein in the step (1) of preparing the activator support particles, the heating time in water bath is 6-8 min.
7. The modified nylon double-layer suede cloth according to claim 4, wherein the adsorbent dispersion liquid is prepared according to the following method:
(1) performing steam curing on the silicate mixed powder, and then uniformly mixing the silicate mixed powder subjected to steam curing, ethanol and a suspension auxiliary agent to obtain a silicate powder suspension; in the step, the silicate mixed powder comprises silicate cement and fly ash;
(2) and (4) freeze-drying the silicate powder suspension to obtain the adsorbent dispersion liquid.
8. The modified nylon double-layer suede cloth of claim 7, wherein the weight ratio of portland cement to fly ash in the silicate mixed powder is 1: (4.2-4.6).
9. The modified nylon double-layer suede-filled cloth of claim 8, wherein the silicate mixed powder further comprises zeolite powder.
10. The method for preparing the modified nylon double-layer suede cloth according to any one of claims 1-9, which is characterized by comprising the following steps:
(1) and (3) spooling: carrying out spooling processing on the modified nylon fiber by using spooling equipment;
(2) warping: warping the modified nylon fiber subjected to spooling treatment by using warping equipment to obtain warp and weft;
(3) sizing: sizing the warp yarns and the weft yarns in a sizing material;
(4) weaving: weaving by using the warp yarns and the weft yarns after sizing as raw materials to obtain grey cloth;
(5) dyeing and finishing: and dyeing, drying by hot air, baking and shaping, soaping, washing and drying for the second time are sequentially carried out on the grey cloth, so that the modified nylon double-layer cotton flannel is obtained.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210373693.3A CN114790586A (en) | 2022-04-11 | 2022-04-11 | Modified nylon double-layer flannelette and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210373693.3A CN114790586A (en) | 2022-04-11 | 2022-04-11 | Modified nylon double-layer flannelette and preparation method thereof |
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| CN114790586A true CN114790586A (en) | 2022-07-26 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332297A (en) * | 2015-10-26 | 2016-02-17 | 江苏悦达纺织集团有限公司 | Functional nylon 66 shell fabric and manufacturing method thereof |
| CN106587816A (en) * | 2016-12-02 | 2017-04-26 | 湖北工业大学 | Method for preparing steam-curing building block through wet-milling waste glass |
| CN109400066A (en) * | 2018-11-22 | 2019-03-01 | 盐城欣昌新型建材有限公司 | A kind of photovoltaic High Strength Regenerated Concrete tubular pole and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332297A (en) * | 2015-10-26 | 2016-02-17 | 江苏悦达纺织集团有限公司 | Functional nylon 66 shell fabric and manufacturing method thereof |
| CN106587816A (en) * | 2016-12-02 | 2017-04-26 | 湖北工业大学 | Method for preparing steam-curing building block through wet-milling waste glass |
| CN109400066A (en) * | 2018-11-22 | 2019-03-01 | 盐城欣昌新型建材有限公司 | A kind of photovoltaic High Strength Regenerated Concrete tubular pole and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张士华;崔崇;陈光;: "粉煤灰增强MC尼龙复合材料制备与性能研究" * |
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