High-strength short fiber production process based on silkworm cocoon shells

Abstract

The invention creatively discloses a high-strength short fiber production process based on silkworm cocoon shells, relates to the technical field of short fiber production processes, and solves the technical problems that an existing technical scheme is easy to shrink and poor in compatibility with other fibers, and the high-strength short fiber production process comprises the following steps: step 1, cocoon shell pretreatment: putting tussah cocoons into a husking machine for shell and cocoon separation, the separated cocoon shells are flattened by the aerostatic press and then input into the slicing machine to be cut into cocoon slices with the length of 2-3.5 cm. According to the cocoon shell separating and cutting device, through combined use of the husking machine, the aerostatic press, the slicing machine and other equipment, rapid separation and accurate cutting of the cocoon shells are achieved, and the problems of low efficiency and impurity residues of traditional manual treatment are solved; a cleaning mode of combining warm water soaking and mechanical stirring is adopted, and 0.1-0.3% of biological enzyme is added, so that the cleaning effect is further improved, the use of a chemical cleaning agent is avoided, the environmental pollution is reduced, and the green and environment-friendly concept is met.

Description

Technical Field

[0001] The present invention relates to the technical field of short fiber production processes, and specifically to a high-strength short fiber production process based on silkworm cocoonshells. Background Art

[0002] In the technical field related to the present invention, the high-strength short fiber production process based on silkworm cocoonshells has achieved a significant improvement in fiber properties through the application and innovation of modern technologies. This process uses advanced equipment and innovative processes to efficiently remove impurities in the silkworm cocoonshells, and through the synergistic treatment of high-pressure water jets and ultrasonic waves, the fibers are evenly separated and oriented. Through digital control technology and low-temperature plasma surface modification, this short fiber has high strength and good moisture absorption, and is suitable for cotton textile machines. Compared with traditional spun silk processes, its products are not only soft but also durable, successfully solving the historical problems of tussah fibers being prone to shrinkage and poor compatibility, thus realizing diversified applications of fibers.

[0003] The birth of this process is of great significance. It not only increases the added value of silkworm cocoonshells and injects new economic vitality into the tussah industry, but also promotes the transformation of the fiber industry towards green and modern directions. This process adopts environmental protection measures such as recycled water and low-temperature energy conservation in fiber production, which helps to reduce resource waste and environmental pollution and conforms to the concept of sustainable development. At the same time, the high-performance short fibers produced are suitable for the fields of clothing manufacturing, home textiles, and industrial fabrics, broadening the application scope and creating more market value, thus promoting the traditional fiber industry to enter a new stage of modern industrialization.

[0004] The existing technical solutions have technical problems such as being prone to shrinkage and poor compatibility with other fibers. Content of the Invention

[0005] In view of the deficiencies of the existing technology, the present invention provides a high-strength short fiber production process based on silkworm cocoonshells, which solves the technical problems of the existing technical solutions being prone to shrinkage and poor compatibility with other fibers.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A high-strength short fiber production process based on silkworm cocoon shells, comprising the following steps: Step (1) Pretreatment of cocoon shells: Tussah cocoons are put into a shelling machine for shell-cocoon separation. After separation, the cocoon shells are flattened by a pneumatic press and then input into a slicing machine to be cut into cocoon slices with a length of 2 - 3.5 cm. The shell-cocoon separation achieved by the shelling machine can quickly and efficiently extract cocoon shells, avoiding the low efficiency and impurity residue problems of traditional manual methods. Flattening and cutting the separated cocoon shells into 2 - 3.5 cm cocoon slices helps the uniform separation of fibers in the subsequent processing. Preferably, the slicing machine blade is made of high-hardness alloy material, and the cutting error is controlled within ±0.2 cm to ensure the consistency of the cocoon slice length, thereby improving the accuracy of fiber processing and the quality of the final product.

[0007] Step (2) Cleaning treatment: The cut cocoon slices are put into a cleaning machine, and a combination of warm water soaking and mechanical stirring is used to remove surface impurities and residues. The soaking time is controlled within 30 - 45 minutes, and the water temperature is maintained at 40 - 60 °C. By combining warm water soaking and mechanical stirring, the impurities and residues on the surface of the cocoon slices are removed, providing a clean raw material for subsequent processing. Preferably, adding 0.1 - 0.3% of biological enzymes can further improve the cleaning effect, decompose the organic impurities in the cocoon slices, and at the same time avoid the use of chemical cleaning agents, meeting the requirements of green and environmental protection production. This step can effectively protect the fiber structure and lay a foundation for high-quality fiber production.

[0008] Step (3) Physical treatment: The cocoon slices are subjected to a combined treatment of high-pressure water jet impact and ultrasonic waves. The treatment parameters are water pressure of 20 - 50 MPa, ultrasonic frequency of 28 - 40 kHz, and treatment time of 30 - 60 minutes. The combined technology of high-pressure water jet impact and ultrasonic waves can efficiently separate the fibers in the cocoon slices while maintaining the integrity of the fibers. The fan-shaped nozzle array of the high-pressure water jet and the preferred nozzle spacing, jet angle, and impact distance can ensure the uniformity and stability of fiber separation. The addition of ultrasonic waves further enhances the treatment effect and reduces fiber damage. Through this physical treatment step, the purity and strength of the fibers can be significantly improved.

[0009] Step (4) Rinsing and dehydration: The cocoon slices after physical treatment are rinsed with pure water, and the number of rinsing times is not less than 3 times. Subsequently, a vacuum dehydration device is used for dehydration, and the dehydration time is controlled within 10 - 20 minutes. Rinsing the cocoon slices after physical treatment with pure water more than 3 times can thoroughly remove residual impurities and ensure the cleanliness of the fibers. The use of a vacuum dehydration device can quickly and evenly remove moisture, preventing the fibers from being damaged due to uneven moisture during the subsequent drying process. Controlling the dehydration time within 10 - 20 minutes helps to maintain the softness and integrity of the fibers and provides a good foundation for the subsequent drying process.

[0010] Step (5) Drying treatment: The dewatered cocoon pieces are subjected to slack drying in sequence. The drying temperature is controlled at 60 - 80°C, and the humidity is maintained at 40 - 60% RH. The microwave-hot air combined drying method is adopted, with a microwave power density of 0.5 - 1.2 W / g and a hot air flow rate of 2 - 4 m / s. Through the slack drying method and in combination with the microwave-hot air combined drying technology, the fibers can be dried quickly and evenly, while avoiding excessive shrinkage or damage of the fibers. The preferred microwave power density and hot air flow rate parameters ensure the efficiency and stability of the drying process. The hot air drying equipment equipped with humidity sensors and temperature sensors can monitor and adjust the drying conditions in real time, further improving the drying quality and ensuring the softness and strength of the fibers.

[0011] Step (6) Fiber carding: Three-stage carding is carried out using a flat carding machine. The speed ratio of the first-stage carding roller is 1:1.2 - 1.5, the second stage is 1:1.8 - 2.2, and the third stage is 1:2.5 - 3.0. During the carding process, a digital control system is used to monitor and adjust the carding intensity in real time, so that the fiber damage rate is controlled within the range of 1.5 - 2.8%. Carrying out three-stage carding using a flat carding machine can effectively separate the fibers and remove impurities, ensuring the uniformity and purity of the fibers. The preferred carding roller speed ratio and digital control system can monitor and adjust the carding intensity in real time, control the fiber damage rate within the range of 1.5 - 2.8%, thereby improving the integrity and quality of the fibers. The equipped intelligent tension adjustment device can further optimize the fiber uniformity and ensure the high performance of the final product.

[0012] Step (7) Fiber surface modification treatment: The carded short fibers are subjected to a low-temperature plasma treatment process with a treatment power of 300 - 500 W and a treatment time of 2 - 5 minutes, thereby improving the fiber surface properties. By modifying the fiber surface through the low-temperature plasma treatment process, the hygroscopicity, durability, and blending performance with other fibers of the fibers can be significantly improved. Preferably, nitrogen is used as the working gas, and the gas flow rate is 50 - 100 mL / min, which can effectively avoid fiber surface oxidation and further enhance the fiber surface properties. This step provides the possibility for the diversified application of the fibers and broadens its market demand.

[0013] Step (8) Performance testing: The modified short fibers are subjected to performance testing to ensure that their linear density is 1.2 - 2.5 dtex, the breaking strength is ≥ 3.5 cN / dtex, and the moisture regain is maintained within the range of 8 - 12%. Through the performance testing link, it is ensured that the linear density, breaking strength, and moisture regain of the fibers reach the established standards (such as a linear density of 1.2 - 2.5 dtex, a breaking strength of ≥ 3.5 cN / dtex, and a moisture regain of 8 - 12%). This step can effectively screen out high-quality fibers, ensure the consistency and stability of the products, and provide customers with high-quality fiber materials.

[0014] Step (9) Packaging and Storage: Classify and package the qualified short fibers according to specifications. The packaging material uses special fiber packaging bags that are moisture-proof and anti-static. The storage environment temperature is controlled at 15 - 25°C, and the humidity is maintained at 40 - 60%. Classifying and packaging the qualified short fibers according to specifications and using special fiber packaging bags that are moisture-proof and anti-static can effectively prevent the fibers from getting damp or damaged during transportation and storage. Preferably, a desiccant is added inside the packaging bag to further enhance the moisture-proof effect during storage. By controlling the temperature and humidity of the storage environment (15 - 25°C, humidity 40 - 60%), the storage period of the fibers can be extended, ensuring that the fibers still maintain excellent performance before use.

[0015] Preferably, in step (1), the cutting blade of the slicing machine is made of high-hardness alloy material, the blade thickness is 0.5 - 1 mm, and the cutting error does not exceed ±0.2 cm.

[0016] Preferably, 0.1 - 0.3% of bio-enzyme is added to the warm water soaking liquid in step (2) to further improve the cleaning effect.

[0017] Preferably, in step (3), the high-pressure water jet impact uses a fan-shaped nozzle array, the nozzle spacing is 10 - 15 mm, the jet angle is 15 - 30°, and the impact distance is 50 - 80 mm.

[0018] Preferably, the hot air drying equipment in step (5) is equipped with a humidity sensor and a temperature sensor to monitor and adjust the drying parameters in real time.

[0019] Preferably, the carding machine in step (6) is equipped with an intelligent tension adjustment device to ensure the uniformity and continuity of the fibers.

[0020] Preferably, in step (7), nitrogen is used as the working gas for the low-temperature plasma treatment, and the gas flow rate is 50 - 100 mL / min.

[0021] Preferably, a desiccant is added inside the packaging bag in step (9) to prevent the fibers from getting damp during storage.

[0022] Beneficial Effects

[0023] The present invention provides a production process for high-strength short fibers based on silkworm cocoons. By combining the use of equipment such as a shelling machine, a pneumatic press, and a slicing machine, the invention realizes the rapid separation and precise cutting of cocoon shells, avoiding the low efficiency and impurity residue problems of traditional manual processing; adopts a cleaning method combining warm water soaking and mechanical stirring, and further improves the cleaning effect by adding 0.1-0.3% of biological enzymes, avoiding the use of chemical cleaning agents and reducing environmental pollution, which conforms to the concept of green environmental protection. In the physical treatment stage, through the synergistic treatment technology of high-pressure water jet and ultrasonic wave, the efficient separation and uniform arrangement of fibers are ensured, while maintaining the integrity of the fibers and reducing fiber damage; the slack drying combined with the microwave-hot air combined drying technology can quickly and uniformly dry the fibers, avoiding the influence of fiber over-contraction or damage on the quality; through performance detection, it is ensured that the linear density (1.2-2.5 dtex), breaking strength (≥3.5 cN / dtex), and moisture regain (8-12%) of the fibers all reach high standards, ensuring the consistency and high performance of the products; the high-strength short fibers produced are not only applicable to traditional spun silk processes but also compatible with cotton textile machines, solving the problems of easy shrinkage and poor compatibility of traditional tussah fibers, expanding the application fields, including clothing manufacturing, home textiles, and industrial fabrics, etc. Detailed implementation mode

[0024] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following will combine 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 a part of the embodiments of the present invention, rather than all the embodiments. The detailed description is as follows.

[0025] The present invention provides a technical solution: a production process for high-strength short fibers based on silkworm cocoons, including the following steps: Step (1) Pretreatment of cocoon shells: Put tussah cocoons into a shelling machine for shell-cocoon separation. After separation, the cocoon shells are flattened by a pneumatic press and then input into a slicing machine to be cut into cocoon slices with a length of 2-3.5 cm; the shell-cocoon separation is realized by the shelling machine, which can quickly and efficiently extract cocoon shells, avoiding the low efficiency and impurity residue problems of traditional manual methods. Flattening and cutting the separated cocoon shells into 2-3.5 cm cocoon slices helps the uniform separation of fibers in the subsequent processing. Preferably, the slicing machine blade is made of high-hardness alloy material, and the cutting error is controlled within ±0.2 cm to ensure the consistency of the cocoon slice length, thereby improving the accuracy of fiber processing and the quality of the final product.

[0026] Step (2) Cleaning treatment: Put the cut cocoon pieces into a washing machine and use a combination of warm water soaking and mechanical stirring to remove surface impurities and residues. The soaking time is controlled within 30 - 45 minutes, and the water temperature is maintained at 40 - 60°C. By combining warm water soaking and mechanical stirring, the impurities and residues on the surface of the cocoon pieces are removed, providing a clean raw material for subsequent processing. Preferably, adding 0.1 - 0.3% of bio - enzyme can further improve the cleaning effect, decompose the organic impurities in the cocoon pieces, and at the same time avoid the use of chemical cleaning agents, meeting the requirements of green and environmental - friendly production. This step can effectively protect the fiber structure and lay a foundation for high - quality fiber production.

[0027] Step (3) Physical treatment: Subject the cocoon pieces to a combined treatment of high - pressure water jet impact and ultrasonic wave. The treatment parameters are water pressure of 20 - 50 MPa, ultrasonic frequency of 28 - 40 kHz, and treatment time of 30 - 60 minutes. By using the combined technology of high - pressure water jet impact and ultrasonic wave, the fibers in the cocoon pieces can be efficiently separated while maintaining the integrity of the fibers. The fan - shaped nozzle array of the high - pressure water jet and the preferred nozzle spacing, jet angle, and impact distance can ensure the uniformity and stability of fiber separation. The addition of ultrasonic waves further enhances the treatment effect and reduces fiber damage. Through this physical treatment step, the purity and strength of the fibers can be significantly improved.

[0028] Step (4) Rinsing and dehydration: The cocoon pieces after physical treatment are rinsed with pure water for no less than 3 times, and then dehydrated using a vacuum dehydration device. The dehydration time is controlled within 10 - 20 minutes. Rinsing the cocoon pieces after physical treatment with pure water more than 3 times can thoroughly remove residual impurities and ensure the cleanliness of the fibers. The use of a vacuum dehydration device can quickly and evenly remove moisture, preventing fiber damage due to uneven moisture during subsequent drying. Controlling the dehydration time within 10 - 20 minutes helps to maintain the softness and integrity of the fibers and provides a good foundation for the subsequent drying process.

[0029] Step (5) Drying treatment: The dehydrated cocoon pieces are subjected to slack - drying in sequence. The drying temperature is controlled at 60 - 80°C, and the humidity is maintained at 40 - 60% RH. A combined microwave - hot air drying method is used, with a microwave power density of 0.5 - 1.2 W / g and a hot air flow rate of 2 - 4 m / s. By using the slack - drying method and combining the microwave - hot air drying technology, the fibers can be quickly and evenly dried while avoiding excessive shrinkage or damage of the fibers. The preferred microwave power density and hot air flow rate parameters ensure the efficiency and stability of the drying process. The hot air drying equipment equipped with humidity sensors and temperature sensors can monitor and adjust the drying conditions in real - time, further improving the drying quality and ensuring the softness and strength of the fibers.

[0030] Step (6) Fiber carding: Three - stage carding is carried out using a flat carding machine. The roller speed ratio of the first stage is 1:1.2 - 1.5, the second stage is 1:1.8 - 2.2, and the third stage is 1:2.5 - 3.0. During the carding process, a digital control system is used to monitor and adjust the carding intensity in real - time, so that the fiber damage rate is controlled within the range of 1.5 - 2.8%. Carrying out three - stage carding using a flat carding machine can effectively separate fibers and remove impurities, ensuring the uniformity and purity of the fibers. The preferred roller speed ratio and digital control system can monitor and adjust the carding intensity in real - time, control the fiber damage rate within the range of 1.5 - 2.8%, thereby improving the integrity and quality of the fibers. Equipping with an intelligent tension adjustment device can further optimize the fiber uniformity and ensure the high performance of the final product.

[0031] Step (7) Fiber surface modification treatment: The carded short fibers are subjected to a low - temperature plasma treatment process with a treatment power of 300 - 500W and a treatment time of 2 - 5 minutes, thereby improving the fiber surface properties. Modifying the fiber surface through the low - temperature plasma treatment process can significantly enhance the hygroscopicity, durability, and blending performance with other fibers of the fibers. Preferably, nitrogen is used as the working gas with a gas flow rate of 50 - 100 mL / min, which can effectively avoid fiber surface oxidation and further enhance the surface properties of the fibers. This step provides the possibility for the diversified application of fibers and broadens its market demand.

[0032] Step (8) Performance detection: The modified short fibers are subjected to performance detection to ensure that their linear density is 1.2 - 2.5 dtex, the breaking strength is ≥3.5 cN / dtex, and the moisture regain is maintained within the range of 8 - 12%. Through the performance detection link, it is ensured that the linear density, breaking strength, and moisture regain of the fibers meet the established standards (such as linear density 1.2 - 2.5 dtex, breaking strength ≥3.5 cN / dtex, moisture regain 8 - 12%). This step can effectively screen out high - quality fibers, ensure the consistency and stability of the products, and provide customers with high - quality fiber materials.

[0033] Step (9) Packaging and storage: The qualified short fibers are classified and packaged according to specifications. The packaging material uses a special fiber packaging bag that is moisture - proof and anti - static. The storage environment temperature is controlled at 15 - 25°C, and the humidity is maintained at 40 - 60%. Classifying and packaging the qualified short fibers according to specifications and using a special fiber packaging bag that is moisture - proof and anti - static can effectively prevent the fibers from being affected by moisture or damaged during transportation and storage. Preferably, a desiccant is added inside the packaging bag to further enhance the moisture - proof effect during storage. By controlling the temperature and humidity of the storage environment (15 - 25°C, humidity 40 - 60%), the storage period of the fibers can be extended, ensuring that the fibers still maintain excellent performance before use.

[0034] This embodiment is further configured such that in step (1), the cutting blade of the slicing machine is made of a high-hardness alloy material, the blade thickness is 0.5 - 1 mm, and the cutting error does not exceed ±0.2 cm.

[0035] This embodiment is further configured such that in step (2), 0.1 - 0.3% of bio-enzyme is added to the warm water soaking liquid to further improve the cleaning effect.

[0036] This embodiment is further configured such that in step (3), the high-pressure water jet impact uses a fan-shaped nozzle array, the nozzle spacing is 10 - 15 mm, the jet angle is 15 - 30°, and the impact distance is 50 - 80 mm.

[0037] This embodiment is further configured such that in step (5), the hot air drying equipment is equipped with a humidity sensor and a temperature sensor to monitor and adjust the drying parameters in real time.

[0038] This embodiment is further configured such that in step (6), the carding machine is equipped with an intelligent tension adjustment device to ensure the uniformity and continuity of the fibers.

[0039] This embodiment is further configured such that in step (7), the low-temperature plasma treatment uses nitrogen as the working gas, and the gas flow rate is 50 - 100 mL / min.

[0040] This embodiment is further configured such that in step (9), a desiccant is added inside the packaging bag to prevent the fibers from getting damp during storage.

[0041] The detailed connection means are well-known techniques in the art; high-quality tussah silkworm cocoons are selected as raw materials. The cocoon shells are preliminarily selected to remove obvious impurities to ensure the cleanliness and purity of the cocoon shells.

[0042] Step (1): Pretreatment of cocoon shells

[0043] The selected tussah silkworm cocoons are put into a shelling machine for shell-cocoon separation, and the separated cocoon shells are sent to a pneumatic press for flattening. Subsequently, the flattened cocoon shells enter a slicing machine and are cut into cocoon slices with a length of 2.5 - 3.0 cm.

[0044] Preferred conditions: The blade thickness of the slicing machine is 1 mm, and the cutting error is controlled within ±0.2 cm to ensure uniform cocoon slice specifications.

[0045] Step (2): Cleaning treatment

[0046] The cut cocoon slices are put into a cleaning machine, warm water is added for soaking, the water temperature is controlled at 50°C, and mechanical stirring cleaning is carried out. To enhance the cleaning effect, 0.2% of bio-enzyme is added to the water, and the soaking time is set to 40 minutes to thoroughly remove the impurities and organic residues on the surface of the cocoon slices.

[0047] Cleaning effect: After using bio-enzyme, the impurity removal rate reaches 99%, while maintaining no damage to the fiber structure.

[0048] Step (3): Physical treatment

[0049] The cleaned cocoon pieces are subjected to the combined treatment of high-pressure water jet impact and ultrasonic wave.

[0050] High-pressure water jet treatment: A fan-shaped nozzle array with a nozzle spacing of 15 mm is adopted, the jet angle is set at 25°, the impact distance is 60 mm, and the water pressure is controlled at 40 MPa.

[0051] Ultrasonic wave treatment: The frequency is controlled at 35 kHz, and the treatment time is set at 40 minutes.

[0052] Treatment effect: The fibers are evenly separated, the purity is greatly improved, while the fiber damage is minimized, and the final purity reaches over 98%.

[0053] Step (4): Rinsing and dehydration

[0054] The cocoon pieces after physical treatment are rinsed with pure water for 3 times, 10 minutes each time, to ensure complete removal of residual impurities. Subsequently, the rinsed cocoon pieces are dehydrated by a vacuum dehydration device, and the dehydration time is set at 15 minutes to reduce the moisture content to an appropriate value and avoid the risk of damage during the subsequent drying process.

[0055] Step (5): Drying treatment

[0056] The dehydrated cocoon pieces are successively fed into a drying device for relaxed drying.

[0057] Microwave drying power density: Controlled at 1 W / g;

[0058] Hot air drying flow rate: Controlled at 3 m / s;

[0059] Drying temperature: Set at 70 °C;

[0060] Drying humidity: Maintained at 50% RH;

[0061] Equipment features: Use a drying device equipped with humidity and temperature sensors to monitor the drying conditions in real time to ensure that the fiber softness and strength are completely ideal.

[0062] Step (6): Fiber carding

[0063] The dried cocoon pieces are fed into a flat carding machine for three-stage carding:

[0064] The speed ratio of the first-stage carding roller is set at 1:1.4;

[0065] The speed ratio of the second-stage carding roller is set at 1:2.0;

[0066] The speed ratio of the third-stage carding roller is set to 1:2.8;

[0067] The carding machine is equipped with a digital real-time control system and an intelligent tension adjustment device to automatically adjust the carding intensity and control the fiber damage rate within 1.6%. After carding, the fiber length consistency is significantly improved, and the evenness reaches the leading level in the industry.

[0068] Step (7): Fiber surface modification treatment

[0069] The carded short fibers are put into a low-temperature plasma treatment device. Nitrogen is used as the working gas. The gas flow rate is set to 80 mL / min, the equipment power is controlled at 400 W, and the treatment time is set to 3 minutes.

[0070] Modification effect: The hygroscopicity of the fiber is increased by 25%, the durability is significantly enhanced, and the blendability with other fibers is significantly improved.

[0071] Step (8): Performance testing

[0072] The processed short fibers are tested. The specific test indicators and results are as follows:

[0073] Linear density: 2.3 dtex;

[0074] Breaking strength: 3.8 cN / dtex;

[0075] Moisture regain: 10.5%;

[0076] Test result: All indicators meet the standards of high-strength short fibers and are high-quality grade products.

[0077] Step (9): Packaging and storage

[0078] The qualified short fibers are classified according to specifications and packaged with special moisture-proof and anti-static fiber packaging bags. A desiccant is placed inside each bag to ensure that moisture is avoided during transportation. The storage environment temperature is strictly controlled at 20 °C, and the humidity is maintained at 50% RH. After 6 months of storage, the performance of the short fibers remains intact without change.

[0079] Implementation results

[0080] Through the above process, a total of 500 kg of silkworm cocoon shells were processed, and 350 kg of high-quality short fiber products were obtained (yield 70%). The short fibers showed excellent blendability in subsequent experiments. The textiles made by blending with fibers such as cotton and polyester have high strength, softness and hygroscopicity, and have been successfully applied in the fields of clothing manufacturing and home textiles, receiving wide acclaim in the market.

[0081] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0082] As mentioned above, the above are only preferred embodiments of the present invention, and there is no restriction on the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A high-strength short fiber production process based on silkworm cocoon shells, characterized in that: The method comprises the following steps: Step (1) cocoon shell pretreatment: placing tussah cocoons into a shelling machine to separate the shells and cocoons, and the separated cocoon shells are flattened by an air compressor and then placed into a slicer to be cut into cocoon slices with a length of 2-3.5 cm; Step (2) cleaning: placing the cut cocoon pieces into a cleaning machine, using a combination of warm water immersion and mechanical stirring to remove surface impurities and residues, the immersion time is controlled to be 30-45 minutes, and the water temperature is maintained at 40-60° C.; Step (3) physical treatment: subjecting the cocoon sheets to high-pressure water jet impact and ultrasonic synergistic treatment, with the treatment parameters being water pressure 20-50 MPa, ultrasonic frequency 28-40 kHz, and treatment time 30-60 minutes; Step (4) rinsing and dehydrating: the cocoon sheets after physical treatment are rinsed with pure water for no less than 3 times, and then dehydrated with a vacuum dehydration device, and the dehydration time is controlled within 10-20 minutes; Step (5) drying: the dehydrated cocoon pieces are dried in a loose manner, the drying temperature is controlled at 60-80° C., the humidity is maintained at 40-60% RH, a microwave-hot air combined drying method is adopted, the microwave power density is 0.5-1.2 W / g, and the hot air flow rate is 2-4 m / s; Step (6) fiber combing: a flat-type combing machine is used for three-stage combing, with a first-stage combing roller speed ratio of 1:1.2-1.5, a second-stage combing roller speed ratio of 1:1.8-2.2, and a third-stage combing roller speed ratio of 1:2.5-3.

0. During the combing process, a digital control system is used to monitor and adjust the combing intensity in real time to control the fiber damage rate within the range of 1.5-2.8%; Step (7) Fiber surface modification: The combed short fibers are subjected to a low-temperature plasma treatment process with a treatment power of 300-500 W and a treatment time of 2-5 minutes, thereby improving the fiber surface properties; Step (8) Performance testing: The modified staple fibers are subjected to performance testing to ensure that the linear density is 1.2-2.5 dtex, the breaking strength is ≥3.5 cN / dtex, and the moisture regain is maintained within the range of 8-12%; Step (9) Packaging and storage: The qualified short fibers are packaged according to specifications, and the packaging materials are moisture-proof and anti-static special fiber packaging bags. The storage environment temperature is controlled at 15-25°C and the humidity is maintained at 40-60%.

2. A high-strength short fiber production process based on silkworm cocoon shells according to claim 1, characterized in that In step (1), the cutting blade of the slicer is made of high-hardness alloy material, the blade thickness is 0.5-1mm, and the cutting error does not exceed ±0.2cm.

3. The high-strength short fiber production process based on silkworm cocoon shells according to claim 1 is characterized in that , 0.1-0.3% of biological enzyme is added to the warm water soaking liquid in step (2) to further improve the cleaning effect.

4. The high-strength short fiber production process based on silkworm cocoon shells according to claim 1 is characterized in that In step (3), the high-pressure water jet impact adopts a fan-shaped nozzle array with a nozzle spacing of 10-15mm, a jet angle of 15-30°, and an impact distance of 50-80mm.

5. The high-strength short fiber production process based on silkworm cocoon shells according to claim 1 is characterized in that ,The hot air drying equipment in step (5) is equipped with a humidity sensor and a temperature sensor to ,monitor and adjust the drying parameters in real time.

6. The high-strength short fiber production process based on silkworm cocoon shells according to claim 1, characterized in that ,The carding machine in step (6) is equipped with an intelligent tension adjustment device to ensure the uniformity and continuity of the fibers.

7. The process for producing high-strength short fibers based on silkworm cocoon shells according to claim 1, characterized in that ,The low-temperature plasma treatment in step (7) uses nitrogen as the working gas, and the gas flow rate is 50-100mL / min.

8. The process for producing high-strength short fibers based on silkworm cocoon shells according to claim 1, characterized in that ,Desiccant is added to the packaging bag in step (9) to prevent the fiber from getting wet during storage.