Tussah silk environment-friendly low-sensitization degumming treatment device and process

Abstract

The invention discloses a tussah silk environment-friendly low-sensitization degumming treatment device and process, and particularly relates to the technical field of tussah silk production equipment.The tussah silk environment-friendly low-sensitization degumming treatment device comprises a mounting frame, filtering devices are arranged on the two sides of the outer surface of a reaction cylinder, and flow guiding pieces are arranged at the lower ends of the two filtering devices; the upper end of the anchor type stirring rod extends to the upper portion of the sealing cover, and the upper portion of the outer surface of the sealing cover is fixedly connected with the output end of an output device. According to the environment-friendly low-sensitization tussah silk degumming treatment device, the filtering device is arranged, in the process that tussah silk and degumming liquid in the inner cavity of the inner container are stirred through an anchor type stirring rod by the output device, a hydraulic cylinder can drive an extraction mechanism to move up and down, and under cooperation of a flow limiting mechanism, the tussah silk and the degumming liquid are extracted; the degumming liquid in the inner cavity of the reaction cylinder can be sucked into the inner cavity of the arc-shaped mounting frame, and impurities carried in the degumming liquid can be filtered through the filtering piece, so that the stability of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tussah silk production equipment, and in particular to an environmentally friendly low-allergenic degumming treatment device for tussah silk. Background Art

[0002] With the improvement of people's living standards, people are increasingly advocating a return to nature. Pure natural silk quilts have health benefits for human skin and cardiovascular system, can prevent rheumatism, arthritis and skin diseases, and are deeply loved by consumers at home and abroad for their lightness, softness, good thermal insulation and elasticity. Silk can be divided into tussah silk and mulberry silk. Compared with mulberry silk, tussah silk feeds on the leaves of oak trees and is mainly distributed in the north. The original color of tussah silk is mostly gray-brown or gray-green, and its diameter is thicker than mulberry silk.

[0003] Chinese patent public number CN118186751A discloses an environmentally friendly low-allergenic treatment process for tussah silk floss, comprising the following steps: S1 degumming and unwinding tussah cocoons, S2 tussah cocoon flossing, S3 boiling tussah silk floss, S4 gentle washing, and S5 drying. In S1, the tussah cocoons are immersed in a degumming treatment solution and sealed; after being taken out, the tussah cocoons are placed in a high-temperature and high-pressure tank, sealed and passed with steam, the steam pressure is maintained, and the heat is kept, and the high-temperature and high-pressure tank is opened after the temperature is lowered, and the tussah cocoons are taken out and rinsed with soft water at room temperature; the tussah used in the refining and boiling is The silk treating agent does not contain APEO components, so that no APEO components are detected in the treated tussah silk floss during testing, and the prepared tussah silk floss is more environmentally friendly. The process uses high temperature and high pressure for processing, making the tussah silk softer and fluffier, and the porosity of the tussah silk is increased by about 16%, which improves the warmth retention effect of the prepared silk quilt. The soft water used reduces the impact of water quality on the softness of the tussah silk floss, but in actual use, the process cannot filter the degumming liquid during the degumming process of the tussah silk. Summary of the invention

[0004] The main purpose of the present invention is to provide an environmentally friendly and low-allergenic degumming treatment device and process for tussah silk, which can effectively solve the problem that the degumming liquid cannot be filtered during the degumming treatment of tussah silk.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] An environmentally friendly low-allergenic degumming treatment device for tussah silk comprises a mounting frame, a reaction cylinder is arranged in the middle of the mounting frame, a sealing cover is arranged on the upper part of the reaction cylinder, an output device is arranged in the middle of the outer surface of the sealing cover, filtering devices are arranged on both sides of the outer surface of the reaction cylinder, a guide piece is arranged at the lower end of the two filtering devices, the inner cavity of the guide piece is communicated with the inner cavity of the reaction cylinder, an anchor stirring rod is arranged in the middle of the inner cavity of the reaction cylinder, the upper end of the anchor stirring rod extends to the upper part of the sealing cover, and the upper part of the outer surface of the sealing cover is fixedly connected to the output end of the output device;

[0007] The reaction cylinder comprises a mounting cylinder, which is fixedly mounted in the middle of a mounting frame, and an inner liner is arranged in the middle of an inner cavity of the mounting cylinder.

[0008] Preferably, the guide member includes a sheep horn tube, and guide tubes are arranged on both sides of the outer surface of the sheep horn tube. A filter plate 2 is arranged at the connection between the two guide tubes and the sheep horn tube. The filter plate 2 is obliquely installed in the inner cavity of the guide tube, and the inner cavities of the two guide tubes and the sheep horn tube are communicated with the inner cavity of the inner tank, and the inner cavities of the two guide tubes are communicated with the inner cavity of the filtering device.

[0009] Preferably, the filtering device includes an arc-shaped mounting frame, which is fixedly mounted on the upper end of the mounting frame, the inner cavities of the multiple arc-shaped mounting frames are communicated with the inner cavities of the two guide pipes, a hydraulic cylinder is arranged in the middle of the outer arc-shaped surface of the arc-shaped mounting frame, two protective covers are arranged on the upper part of the arc-shaped mounting frame, and the middle parts of the upper ends of the two protective covers are both provided with discharge pipes, a limiting flow mechanism is arranged in the lower part of the inner cavity of the arc-shaped mounting frame, an extraction mechanism is arranged on the lower side of the middle part of the inner cavity of the arc-shaped mounting frame, a cleaning piece is arranged on the upper side of the middle part of the inner cavity of the arc-shaped mounting frame, and filtering elements are arranged on both sides of the upper part of the inner cavity of the arc-shaped mounting frame.

[0010] Preferably, the current limiting mechanism includes an arc plate, which is fixedly mounted on the lower part of the inner cavity of the arc-shaped mounting frame. A plurality of mounting holes are provided in the middle of the arc plate, and two baffles are rotatably mounted on the upper part of the inner cavity of the plurality of mounting holes. The lower ends of the plurality of baffles are provided with elastic ropes fixedly connected to the lower end of the arc plate.

[0011] Preferably, the extraction mechanism includes an arc plate 2, which is slidably mounted in the middle of the inner cavity of the arc mounting frame, a pull rod is provided in the middle of the arc plate 2, the upper end of the pull rod extends to the upper part of the arc mounting frame, and the upper end of the pull rod is fixedly connected to the output end of the hydraulic cylinder, a plurality of mounting plates are provided on both sides of the upper end of the arc plate 2, a mounting hole 2 is provided in the middle of the arc plate 2, and a plug plate is provided in the upper part of the inner cavity of the plurality of mounting holes 2, and the plurality of plug plates are respectively slidably mounted on the lower end of the mounting plate, and the upper ends of the plurality of plug plates are respectively provided with springs 1 fixedly mounted on the lower ends of the plurality of mounting plates.

[0012] Preferably, the cleaning member includes an arc-shaped frame, which is fixedly installed in the middle of the inner cavity of the arc-shaped mounting frame, and the middle part of the arc-shaped frame is slidably connected to the outer surface of the pull rod, and filter plates are provided on both sides of the middle part of the arc-shaped frame, and cleaning members are slidably installed on both sides of the lower part of the inner cavity of the arc-shaped frame, and filter frames are provided on one side of the outer surface of the two cleaning members, and the two filter frames are slidably installed on the inner wall of the arc-shaped mounting frame, and a filter screen is provided on the upper part of the filter frame, and the filter screen is located on the upper part of the filter plate, and a push rod is rotatably installed in the middle part of the lower end of the two cleaning members, and the lower parts of the two push rods are rotatably installed on the outer surface of the pull rod.

[0013] Preferably, the cleaning part includes a cleaning frame, which is slidably installed in the lower part of the inner cavity of the arc-shaped frame, and two cleaning plates are arranged in the middle part of the inner cavity of the cleaning frame, and the two cleaning plates are adapted for use with a filter plate, and a guide frame is arranged on one side of the lower part of the cleaning frame close to the filter frame, and the guide frame is connected to the corresponding filter frame through a telescopic connecting pipe.

[0014] Preferably, the filter element comprises a placement frame, and a second filter screen is arranged in the middle of the inner cavity of the placement frame.

[0015] The present invention also discloses a production process for producing the above-mentioned environmentally friendly low-allergenic degumming treatment of tussah silk, and the specific steps are as follows:

[0016] Step 1: Raw material preparation

[0017] 1. Tussah silk screening: Select tussah silk raw materials with good quality and no obvious impurities and pests and diseases. Preliminary screening can be carried out based on the thickness uniformity, color, feel and other indicators of the silk. For the raw materials of silkworm cocoons, the integrity and thickness of the cocoon layer need to be checked to ensure the consistency of the subsequent degumming process.

[0018] 2. Pretreatment: Simply clean the selected tussah silk to remove dust, debris and other impurities on the surface. Gentle water washing can be used, and the water temperature is controlled at 30-40℃ to avoid excessive water temperature damaging the silk fibers. After washing, dry it naturally or dry it at low temperature (temperature not exceeding 50℃) to make the moisture content of the tussah silk reach the appropriate range, generally 10% to 15%.

[0019] Step 2: Preparation of degumming solution

[0020] 1. Biological enzyme selection: Choose biological enzymes that have a high efficiency in decomposing sericin, such as protease, lipase, etc. Protease can specifically decompose the protein components in sericin, and lipase can act on the fat substances in sericin. The activity and purity of the enzyme must be strictly controlled to ensure its effectiveness in the degumming process.

[0021] 2. Addition of environmentally friendly additives: Add appropriate amounts of environmentally friendly additives, such as biodegradable surfactants, buffers, etc. Surfactants can enhance the penetration of the degumming solution and make it easier for the enzyme to contact the sericin. Alkyl glycoside surfactants are commonly used. Buffers are used to maintain the pH value of the degumming solution stable. Generally, the pH value is controlled between 6-8 to ensure the best active environment for the biological enzyme.

[0022] 3. Degumming liquid proportion: According to the weight of tussah silk and degumming requirements, accurately adjust the proportion of biological enzyme and auxiliary agent in the degumming liquid. Usually the content of biological enzyme is 0.5% to 2% (mass fraction), the content of auxiliary agent is 1% to 5% (mass fraction), and the rest is water. Stir fully during the preparation process to ensure that all ingredients are evenly mixed.

[0023] Step 3: Degumming

[0024] 1. Reactor preparation: Check whether all equipment of the reactor is operating normally, such as the stirring device, heating system, temperature sensor, etc. Ensure that the inside of the reactor is clean and free of residual impurities. Add an appropriate amount of degumming liquid into the reactor, and the amount of degumming liquid should be able to completely immerse the tussah silk.

[0025] 2. Degumming process: Put the pretreated tussah silk into the reactor, turn on the stirring device, and fully disperse the tussah silk in the degumming liquid. Set up a heating system to control the reaction temperature at 60-80℃. Too high a temperature may cause damage to the silk fibroin, and too low a temperature will affect the degumming efficiency. The stirring speed is controlled at 60-100 rpm to ensure that the degumming liquid is in full contact with the tussah silk. The degumming time depends on the variety, thickness and degumming requirements of the tussah silk, generally 1-3 hours. During this process, samples can be taken regularly to observe the degumming effect, such as observing the degree of sericin removal through a microscope, and touching the silk with your hands to feel the softness.

[0026] 3. Circulation filtration: During the degumming process, the circulation filtration system is started to continuously extract the degumming liquid in the reactor, remove the sericin fragments and impurities through the filtration device, and then return it to the reactor. The filtration device can use a multi-layer filter screen, and the filter screen aperture is selected between 5-100 microns according to the size of the impurities to ensure the cleanliness of the degumming liquid and improve the degumming quality.

[0027] Step 4: Cleaning and Neutralization

[0028] 1. Cleaning: After degumming is completed, the tussah silk is taken out of the reactor and placed in the cleaning equipment for cleaning. The residual degumming liquid and sericin decomposition products are removed by multiple water washing. The water temperature of each washing can be gradually reduced, starting from about 50°C and finally to room temperature. The cleaning time is 10 to 15 minutes each time, and the number of washings is generally 3 to 5 times, until the washing water is clear.

[0029] 2. Neutralization: After cleaning, the tussah silk may still have a certain acidity or alkalinity, and needs to be neutralized. You can use a weak alkaline or weak acid neutralizer, such as sodium bicarbonate solution (pH value is about 8-9) or citric acid solution (pH value is about 3-4), soak the tussah silk in the neutralizer for 5 to 10 minutes to make the pH value of the tussah silk close to neutral (pH value is 6.5-7.5). After neutralization, rinse with clean water 1-2 times to remove the residual neutralizer.

[0030] Step 5: Drying and finishing

[0031] 1. Drying: Dry the neutralized and cleaned tussah silk. It can be dried naturally or at low temperature. When drying naturally, choose a well-ventilated place without direct sunlight to prevent the silk from turning yellow and brittle due to exposure to the sun. When drying at low temperature, the temperature is controlled at 50-60℃. The drying time depends on the moisture content and quantity of the silk, generally 2-4 hours. During the drying process, pay attention to turning the tussah silk to make it dry evenly.

[0032] 2. Finishing: After drying, the tussah silk may be tangled or uneven, and needs to be sorted. You can use manual or mechanical combing to comb the tussah silk neatly and make the fibers straight. For some products with special requirements, you can also perform finishing processes such as softening treatment and antistatic treatment to improve the quality and performance of the tussah silk.

[0033] Step 6: Quality Inspection

[0034] 1. Appearance inspection: Observe whether the color of the tussah silk is uniform and white, and whether there are defects such as yellow spots and black spots. Check whether the surface of the silk is smooth and whether there are obvious fiber breaks or entanglements.

[0035] 2. Physical performance testing: Testing the strength, elongation, moisture regain and other physical indicators of tussah silk. Strength and elongation can be tested by a universal material testing machine, while moisture regain can be measured by an oven method or resistance method. All physical performance indicators should meet relevant standards or customer requirements.

[0036] 3. Chemical property testing: Detect the content of residual biological enzymes, additives, heavy metals and other chemical substances in tussah silk, and use analytical methods such as high performance liquid chromatography and atomic absorption spectroscopy to ensure that the residual chemical substances are lower than the prescribed safety standards to ensure the environmental protection and low allergenicity of the product.

[0037] 4. Allergenicity testing: The allergenicity of tussah silk products is tested through animal experiments or human patch tests. The processed tussah silk samples are brought into contact with experimental animals or human skin to observe whether allergic reactions such as redness, swelling, itching, etc. occur. Only products that pass the allergenicity test can be sold on the market.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. In the present invention, by providing a flow guide, when the filter device sucks the degumming liquid in the inner cavity of the reaction cylinder into its inner cavity, a large part of the tussah silk can be prevented from entering the inner cavity of the filter device through the filter plate 2, thereby improving the reliability of the device.

[0040] 2. In the present invention, by providing a filtering device, when the output device stirs the tussah silk and degumming liquid in the inner cavity of the inner tank through the anchor stirring rod, the hydraulic cylinder will drive the extraction mechanism to move up and down. With the cooperation of the current limiting mechanism, the degumming liquid in the inner cavity of the reaction cylinder can be sucked into the inner cavity of the arc-shaped mounting frame. The impurities contained in the degumming liquid can be filtered through the filter element, thereby improving the stability of the device.

[0041] 3. In the present invention, by providing a cleaning piece, when the filter device sucks the degumming liquid in the inner cavity of the liner into its inner cavity, a part of the tussah silk will be sucked into the inner cavity of the arc-shaped mounting frame. The cleaning piece can be used to clean this part of the tussah silk, thereby preventing the device from running for a period of time, resulting in a large amount of tussah silk in the inner cavity of the arc-shaped mounting frame, which affects the normal movement of the extraction mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0043] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0044] Figure 3It is a schematic diagram of the reaction tube structure of the present invention;

[0045] Figure 4 It is a schematic diagram of the structure of the flow guide member of the present invention;

[0046] Figure 5 The structure of the filter device of the present invention is shown in FIG. Figure 1 ;

[0047] Figure 6 The structure of the filter device of the present invention is shown in FIG. Figure 2 ;

[0048] Figure 7 It is a schematic diagram of the structure of the current limiting mechanism of the present invention;

[0049] Figure 8 It is a schematic diagram of the structure of the extraction mechanism of the present invention;

[0050] Fig. 9 The cleaning member structure of the present invention is schematically shown in FIG. Figure 1 ;

[0051] Fig.10 The cleaning member structure of the present invention is schematically shown in FIG. Figure 2 ;

[0052] Fig.11 It is a schematic diagram of the structure of the cleaning piece of the present invention;

[0053] Fig.12 It is a schematic diagram of the filter structure of the present invention.

[0054] In the figure: 1, mounting frame; 2, reaction cylinder; 21, mounting cylinder; 22, liner; 3, sealing cover; 4, output device; 5, filtering device; 51, arc-shaped mounting frame; 52, hydraulic cylinder; 53, protective cover; 54, discharge pipe; 55, current limiting mechanism; 551, arc-shaped plate 1; 552, baffle; 553, elastic rope; 56, extraction mechanism; 561, arc-shaped plate 2; 562, pull rod; 563, mounting plate; 564 , plug plate; 565, spring one; 57, cleaning piece; 571, arc frame; 572, filter plate one; 573, cleaning piece; 5731, cleaning frame; 5732, cleaning plate; 5733, guide frame; 574, filter frame; 575, push rod; 58, filter element; 581, placement frame; 582, filter screen two; 6, anchor stirring rod; 7, guide piece; 71, sheep horn tube; 72, guide tube; 73, filter plate two. DETAILED DESCRIPTION

[0055] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0056] Embodiment 1, as Figure 1— Figure 3 As shown, the present embodiment discloses an environmentally friendly low-allergenic degumming treatment device for tussah silk, comprising a mounting frame 1, a reaction cylinder 2 is arranged in the middle of the mounting frame 1, a sealing cover 3 is arranged on the upper part of the reaction cylinder 2, an output device 4 is arranged in the middle of the outer surface of the sealing cover 3, filtering devices 5 are arranged on both sides of the outer surface of the reaction cylinder 2, a guide member 7 is arranged at the lower end of the two filtering devices 5, the inner cavity of the guide member 7 is communicated with the inner cavity of the reaction cylinder 2, an anchor stirring rod 6 is arranged in the middle of the inner cavity of the reaction cylinder 2, the upper end of the anchor stirring rod 6 extends to the upper part of the sealing cover 3, and the upper part of the outer surface of the sealing cover 3 is fixedly connected to the output end of the output device 4.

[0057] Furthermore, the reaction tube 2 comprises a mounting tube 21 , which is fixedly mounted in the middle of the mounting frame 1 , and an inner liner 22 is disposed in the middle of the inner cavity of the mounting tube 21 .

[0058] Specifically, before desensitizing the tussah silk, the staff needs to introduce the tussah silk and the corresponding degumming liquid into the inner cavity of the inner liner 22 through different feed pipes on the upper part of the sealing cover 3, and then the staff can start the output device 4 to drive the anchor stirring rod 6 to rotate, so that the anchor stirring rod 6 stirs the tussah silk and the degumming liquid in the inner cavity of the inner liner 22 so that the two can fully react. At the same time, the filter device 5 can draw the degumming liquid in the lower part of the inner cavity of the inner liner 22 into its inner cavity through the guide member 7 for filtration, and the filtered degumming liquid enters the lower part of the inner cavity of the inner liner 22 again from the upper part of the filter device 5.

[0059] Furthermore, a heating component is provided between the mounting tube 21 and the inner container 22 to accelerate the reaction rate of the tussah silk and the degumming solution.

[0060] In order to connect the inner tank 22 and the inner cavity of the filter device 5, and at the same time, prevent most of the tussah silk from entering the inner cavity of the filter device 5, as shown in FIG. Figure 4 As shown, the guide member 7 includes a sheep horn tube 71, and guide tubes 72 are arranged on both sides of the outer surface of the sheep horn tube 71. A filter plate 2 73 is arranged at the connection between the two guide tubes 72 and the sheep horn tube 71. The filter plate 2 73 is obliquely installed in the inner cavity of the guide tube 72. The inner cavities of the two guide tubes 72 and the sheep horn tube 71 are communicated with the inner cavity of the inner tank 22, and the inner cavities of the two guide tubes 72 are communicated with the inner cavity of the filter device 5.

[0061] Specifically, in the process that the filter device 5 sucks the degumming liquid in the inner cavity of the reaction cylinder 2 into its inner cavity, the filter device 5 sucks the degumming liquid in the inner cavity of the inner tank 22 into its inner cavity through two guide tubes 72. In this process, most of the tussah silk can be prevented from entering the inner cavity of the filter device 5 through the filter plate 2 73.

[0062] Furthermore, in the process of the filter device 5 introducing the degumming liquid into its inner cavity through the two guide tubes 72, since the filter plate 2 73 is installed obliquely in the inner cavity of the guide tube 72, a part of the degumming liquid may be guided into the inner cavity of the sheep horn tube 71 by the filter plate 2 73, so that a part of the tussah silk blocked by the filter plate 2 73 will enter the inner cavity of the sheep horn tube 71 under the action of this part of the degumming liquid, and then enter the inner cavity of the inner tank 22 again, avoiding blockage of the inner cavity of the two guide tubes 72.

[0063] When the tussah silk is degummed in the inner cavity of the inner liner 22, some impurities will be entrained in the degumming liquid, so it is necessary to filter the degumming liquid in the inner cavity of the inner liner 22. Figure 5 and Figure 6 As shown, the filtering device 5 includes an arc-shaped mounting frame 51, which is fixedly mounted on the upper end of the mounting frame 1, the inner cavities of the multiple arc-shaped mounting frames 51 are communicated with the inner cavities of the two guide tubes 72, a hydraulic cylinder 52 is arranged in the middle of the outer arc-shaped surface of the arc-shaped mounting frame 51, two protective covers 53 are arranged on the upper part of the arc-shaped mounting frame 51, and the middle parts of the upper ends of the two protective covers 53 are both provided with discharge pipes 54, a limiting flow mechanism 55 is arranged in the lower part of the inner cavity of the arc-shaped mounting frame 51, an extraction mechanism 56 is arranged on the lower side of the middle part of the inner cavity of the arc-shaped mounting frame 51, and filter elements 58 are arranged on both sides of the upper part of the inner cavity of the arc-shaped mounting frame 51.

[0064] Specifically, when the output device 4 stirs the tussah silk and degumming liquid in the inner cavity of the liner 22 through the anchor stirring rod 6, the hydraulic cylinder 52 drives the extraction mechanism 56 to move up and down. During the upward movement of the extraction mechanism 56, the pressure between the flow limiting mechanism 55 and the extraction mechanism 56 decreases, so the relevant components on the flow limiting mechanism 55 are opened, and the degumming liquid in the lower part of the inner cavity of the arc-shaped mounting frame 51 is sucked into the middle part of the inner cavity of the arc-shaped mounting frame 51. In this process, the degumming liquid in the inner cavity of the liner 22 will enter the inner cavity of the arc-shaped mounting frame 51 under the action of pressure. In the process, when the extraction mechanism 56 moves downward, the pressure between the flow limiting mechanism 55 and the extraction mechanism 56 will become stronger. At this time, the flow limiting mechanism 55 will be in a closed state, but the relevant components on the extraction mechanism 56 will open under the action of pressure, so that the degumming liquid between the extraction mechanism 56 and the flow limiting mechanism 55 is introduced into the upper part of the extraction mechanism 56. Then, when the extraction mechanism 56 moves up and down, the extraction mechanism 56 will push this part of the degumming liquid into the filter element 58 for filtration, and the filtered degumming liquid enters the upper part of the inner cavity of the reaction cylinder 2 through the two discharge pipes 54.

[0065] In order to draw the degumming liquid in the inner cavity of the liner 22 into the inner cavity of the arc-shaped mounting frame 51, as shown in FIG. Figure 7As shown, the current limiting mechanism 55 includes an arc plate 551, which is fixedly mounted on the lower part of the inner cavity of the arc mounting frame 51. A plurality of mounting holes 1 are provided in the middle of the arc plate 551. Two baffles 552 are rotatably mounted on the upper part of the inner cavity of the plurality of mounting holes 1. The lower ends of the plurality of baffles 552 are provided with elastic ropes 553 fixedly connected to the lower end of the arc plate 551.

[0066] Further, such as Figure 8 As shown, the extraction mechanism 56 includes an arc plate 561, which is slidably installed in the middle of the inner cavity of the arc mounting frame 51, and a pull rod 562 is provided in the middle of the arc plate 561. The upper end of the pull rod 562 extends to the upper part of the arc mounting frame 51, and the upper end of the pull rod 562 is fixedly connected to the output end of the hydraulic cylinder 52. A plurality of mounting plates 563 are provided on both sides of the upper end of the arc plate 561, and a mounting hole 2 is provided in the middle of the arc plate 561. A plug plate 564 is provided in the upper part of the inner cavity of the plurality of mounting holes 2. The plurality of plug plates 564 are respectively slidably installed on the lower end of the mounting plate 563, and the upper ends of the plurality of plug plates 564 are respectively provided with springs 565 fixedly installed on the lower ends of the plurality of mounting plates 563.

[0067] In order to filter the degumming solution, Fig.12 As shown, the filter element 58 includes a placement frame 581 , and a filter screen 582 is arranged in the middle of the inner cavity of the placement frame 581 .

[0068] Specifically, in the process that the hydraulic cylinder 52 drives the arc plate 2 561 to move upward through the pull rod 562, the plug plate 564 in the second mounting hole in the middle of the arc plate 2 561 will have a force to move downward under the action of pressure, but the plug plate 564 cannot move downward at this time, thereby reducing the pressure between the arc plate 2 561 and the arc plate 1 551. At this time, the two baffles 552 in the first mounting hole in the middle of the arc plate 1 551 will rotate under the action of pressure, so that the degumming liquid can enter between the arc plate 1 551 and the arc plate 2 561 through the mounting hole. At the same time, the elastic rope 553 connected to the baffle 552 will be stretched by force.

[0069] Furthermore, when the arc plate 2 561 moves downward, the space between the arc plate 1 551 and the arc plate 2 561 is filled with degumming liquid, and the baffle 552 of the first mounting hole in the middle of the arc plate 1 551 will return to its initial state under the action of the elastic rope 553. At this time, when the arc plate 2 561 moves downward, the pressure in the space between the arc plate 2 561 and the arc plate 1 551 will increase, causing the degumming liquid between the arc plate 1 551 and the arc plate 2 561 to push the plug plate 564 in the middle mounting hole of the arc plate 2 561 upward, so that the degumming liquid between the arc plate 2 561 and the arc plate 1 551 enters the upper part of the arc plate 2 561. During this process, the spring 1 565 at the upper end of the plug plate 564 will be compressed by force, and this reciprocating movement will occur.

[0070] Furthermore, the second filter screen 582 can filter the impurities in the degumming liquid. The second filter screen 582 is a prior art and will not be described in detail in this specification.

[0071] Furthermore, after the filter screen 582 has been used for a period of time, the staff can open the protective cover 53 and then take out the filter screen 582 for cleaning or replacement.

[0072] Embodiment 2: This embodiment further improves the cleaning member 57 based on the embodiment 1. Figure 1 - Figure 3 As shown, a cleaning member 57 is provided on the upper side of the middle portion of the inner cavity of the arc-shaped installation frame 51 .

[0073] In order to process a small amount of tussah silk entering the inner cavity of the arc-shaped installation frame 51, Fig. 9 and Fig.10 As shown, the cleaning member 57 includes an arc frame 571, which is fixedly installed in the middle of the inner cavity of the arc-shaped mounting frame 51, and the middle part of the arc frame 571 is slidably connected to the outer surface of the pull rod 562. Filter plates 572 are arranged on both sides of the middle part of the arc frame 571, and cleaning members 573 are slidably installed on both sides of the lower part of the inner cavity of the arc frame 571. Filter frames 574 are arranged on one side of the outer surface of the two cleaning members 573. The two filter frames 574 are slidably installed on the inner wall of the arc-shaped mounting frame 51, and a filter screen 1 is arranged on the upper part of the filter frame 574. The filter screen 1 is located on the upper part of the filter plate 572, and a push rod 575 is rotatably installed in the middle part of the lower end of the two cleaning members 573, and the lower parts of the two push rods 575 are rotatably installed on the outer surface of the pull rod 562.

[0074] Further, such as Fig.11 As shown, the cleaning member 573 includes a cleaning frame 5731, which is slidably installed in the lower part of the inner cavity of the arc frame 571. Two cleaning plates 5732 are arranged in the middle part of the inner cavity of the cleaning frame 5731. The two cleaning plates 5732 are adapted for use with the filter plate 572. A guide frame 5733 is arranged on the lower part of the cleaning frame 5731 close to the filter frame 574. The guide frame 5733 is connected to the corresponding filter frame 574 through a telescopic connecting pipe.

[0075] Specifically, in the process that the filtering device 5 absorbs the degumming liquid in the inner cavity of the inner liner 22 into its inner cavity, a part of the tussah silk will be absorbed into the inner cavity of the arc-shaped mounting frame 51. If there are no other components to clean this part of the tussah silk, after the device has been running for a period of time, it may cause a large amount of tussah silk to exist in the inner cavity of the arc-shaped mounting frame 51, affecting the normal movement of the extraction mechanism 56.

[0076] Furthermore, in order to avoid the above situation, a cleaning member 57 is provided between the arc plate 2 561 and the placement frame 581, and the degumming liquid can be filtered through the filter plate 1 572. At the same time, in the process of the pull rod 562 driving the arc plate 2 561 to move up and down, the pull rod 562 drives the cleaning frames 5731 on both sides to reciprocate through the push rod 575. During this process, the cleaning plate 5732 in the cleaning frame 5731 can clean the surface of the filter plate 1 572 to avoid the phenomenon of tussah silk clogging the filter plate 1 572.

[0077] Furthermore, the connection mechanism between the cleaning frame 5731 and the pull rod 562 can be both rotatable and slidable.

[0078] Furthermore, the tussah silk cleaned by the cleaning plate 5732 will enter the inner cavity of the cleaning frame 5731, and then during the upward movement of the extraction mechanism 56, the degumming liquid will carry this part of the tussah silk through the guide frame 5733 into the inner cavity of the filter frame 574, and then the degumming liquid will pass through the filter mesh 1 at the top of the filter frame 574 and enter the upper part of the filter plate 1 572, and then the degumming liquid will be filtered through the filter mesh 2 582 and enter the inner cavity of the reaction cylinder 2.

[0079] Furthermore, after the device has been running for a period of time, the staff can remove the filter frame 574 to process the tussah silk in the inner cavity of the filter frame 574 .

[0080] Embodiment 3, the present application also discloses a production process of environmentally friendly low-allergenic degumming of tussah silk, the specific steps of which are:

[0081] Step 1: Raw material preparation

[0082] 1. Screening of tussah silk: Select tussah silk raw materials with good quality and no obvious impurities and pests and diseases. Preliminary screening can be carried out based on the thickness uniformity, color, feel and other indicators of the silk. For the cocoon raw materials, it is necessary to check the integrity and thickness of the cocoon layer to ensure the consistency of the subsequent degumming treatment.

[0083] 2. Pretreatment: Simply clean the selected tussah silk to remove dust, debris and other impurities on the surface. Use gentle water washing and control the water temperature at 30-40°C to avoid excessive water temperature damaging the silk fibers. After washing, dry it naturally or dry it at low temperature (the temperature does not exceed 50°C) to make the moisture content of the tussah silk reach the appropriate range, generally 10% to 15%.

[0084] Step 2: Preparation of degumming solution

[0085] 1. Biological enzyme selection: Choose biological enzymes that have a high efficiency in decomposing sericin, such as protease and lipase. Protease can specifically decompose the protein components in sericin, and lipase can act on the fat substances in sericin. The activity and purity of the enzyme must be strictly controlled to ensure its effectiveness in the degumming process.

[0086] 2. Addition of environmentally friendly additives: Add appropriate amounts of environmentally friendly additives, such as biodegradable surfactants, buffers, etc. Surfactants can enhance the penetration of the degumming solution and make it easier for the enzyme to contact the sericin. Commonly used surfactants are alkyl glycosides. Buffers are used to maintain the pH value of the degumming solution stable. Generally, the pH value is controlled between 6-8 to ensure the best active environment for the biological enzyme.

[0087] 3. Proportion preparation of degumming liquid: According to the weight of tussah silk and degumming requirements, accurately prepare the ratio of biological enzyme and auxiliary agent in the degumming liquid. Usually the content of biological enzyme is 0.5%~2% (mass fraction), the content of auxiliary agent is 1%~5% (mass fraction), and the rest is water. During the preparation process, it is necessary to stir fully to ensure that all ingredients are evenly mixed.

[0088] Step 3: Degumming

[0089] 1. Reactor preparation: Check whether all equipment of the reactor is operating normally, such as the stirring device, heating system, temperature sensor, etc., ensure that the inside of the reactor is clean and free of residual impurities, and add an appropriate amount of degumming liquid into the reactor. The amount of degumming liquid should be able to completely immerse the tussah silk.

[0090] 2. Degumming process: put the pretreated tussah silk into the reactor, turn on the stirring device to fully disperse the tussah silk in the degumming liquid, set up the heating system, and control the reaction temperature at 60-80℃. Too high temperature may cause damage to the silk fibroin, and too low temperature will affect the degumming efficiency. The stirring speed is controlled at 60-100 rpm to ensure that the degumming liquid is in full contact with the tussah silk. The degumming time depends on the variety, thickness and degumming requirements of the tussah silk, generally 1-3 hours. During this process, samples can be taken regularly to observe the degumming effect, such as observing the degree of sericin removal through a microscope, and feeling the softness of the silk by hand.

[0091] 3. Circulation filtration: During the degumming process, the circulation filtration system is started to continuously extract the degumming liquid in the reactor, remove the sericin fragments, impurities, etc. through the filtration device, and then return it to the reactor. The filtration device can use a multi-layer filter screen, and the filter screen aperture is selected between 5-100 microns according to the size of the impurities to ensure the cleanliness of the degumming liquid and improve the degumming quality.

[0092] Step 4: Cleaning and Neutralization

[0093] 1. Cleaning: After degumming is completed, the tussah silk is taken out of the reactor and placed in the cleaning equipment for cleaning. The residual degumming liquid and sericin decomposition products are removed by multiple water washings. The water temperature of each washing can be gradually reduced, starting from about 50°C and finally dropping to room temperature. The cleaning time is 10 to 15 minutes each time, and the number of washings is generally 3 to 5 times, until the washing water is clear.

[0094] 2. Neutralization: After cleaning, the tussah silk may still have a certain acidity or alkalinity and needs to be neutralized. You can use a weak alkaline or weak acid neutralizer, such as sodium bicarbonate solution (pH value is about 8-9) or citric acid solution (pH value is about 3-4). Soak the tussah silk in the neutralizer for 5 to 10 minutes to make the pH value of the tussah silk close to neutral (pH value is 6.5-7.5). After neutralization, rinse with clean water 1-2 times to remove the residual neutralizer.

[0095] Step 5: Drying and finishing

[0096] 1. Drying: Dry the neutralized and cleaned tussah silk. It can be dried naturally or at low temperature. When drying naturally, choose a well-ventilated place without direct sunlight to prevent the silk from turning yellow and brittle due to exposure to the sun. When drying at low temperature, the temperature is controlled at 50-60℃. The drying time depends on the moisture content and quantity of the silk, generally 2-4 hours. During the drying process, pay attention to turning the tussah silk to make it dry evenly.

[0097] 2. Finishing: After drying, the tussah silk may become tangled or uneven and needs to be sorted. It can be combed manually or mechanically to make the tussah silk neat and straight. For some products with special requirements, softening treatment, antistatic treatment and other post-finishing processes can also be performed to improve the quality and performance of the tussah silk.

[0098] Step 6: Quality Inspection

[0099] 1. Appearance inspection: Observe whether the color of the tussah silk is uniform and white, whether there are defects such as yellow spots and black spots, check whether the surface of the silk is smooth, and whether there are obvious fiber breaks or entanglements.

[0100] 2. Physical property testing: Test the strength, elongation, moisture regain and other physical indicators of tussah silk. The strength and elongation can be tested by a universal material testing machine, while the moisture regain can be measured by an oven method or a resistance method. Each physical property indicator should comply with relevant standards or customer requirements.

[0101] 3. Chemical property testing: Detect the content of residual biological enzymes, additives, heavy metals and other chemical substances in tussah silk, and use analytical methods such as high performance liquid chromatography and atomic absorption spectroscopy to ensure that the residual chemical substances are lower than the prescribed safety standards to ensure the environmental protection and low allergenicity of the product.

[0102] 4. Allergenicity testing: The allergenicity of tussah silk products is tested through animal experiments or human patch tests. The processed tussah silk samples are brought into contact with experimental animals or human skin to observe whether allergic reactions such as redness, swelling, itching, etc. occur. Only products that pass the allergenicity test can be sold on the market.

[0103] It should be noted that the specific installation method, circuit arrangement and connection method of the output device (4) and the hydraulic cylinder (52) used in the above-mentioned embodiment 1 and their control method are all conventional designs in the prior art and will not be elaborated in detail in the present invention.

[0104] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An environmentally friendly hypoallergenic degumming treatment device for tussah silk, comprising a mounting frame (1), characterized in that: A reaction cylinder (2) is arranged in the middle of the mounting frame (1), a sealing cover (3) is arranged on the upper part of the reaction cylinder (2), an output device (4) is arranged in the middle of the outer surface of the sealing cover (3), filtering devices (5) are arranged on both sides of the outer surface of the reaction cylinder (2), a flow guide (7) is arranged at the lower end of the two filtering devices (5), the inner cavity of the flow guide (7) is communicated with the inner cavity of the reaction cylinder (2), an anchor stirring rod (6) is arranged in the middle of the inner cavity of the reaction cylinder (2), the upper end of the anchor stirring rod (6) extends to the upper part of the sealing cover (3), and the upper part of the outer surface of the sealing cover (3) is fixedly connected to the output end of the output device (4); The reaction cylinder (2) comprises a mounting cylinder (21), wherein the mounting cylinder (21) is fixedly mounted in the middle of the mounting frame (1), and an inner liner (22) is arranged in the middle of the inner cavity of the mounting cylinder (21).

2. The environmentally friendly low-allergenic degumming treatment device for tussah silk according to claim 1, characterized in that: The flow guide (7) comprises a horn tube (71), flow guide tubes (72) are arranged on both sides of the outer surface of the horn tube (71), a second filter plate (73) is arranged at the connection between the two flow guide tubes (72) and the horn tube (71), and the second filter plate (73) is installed obliquely in the inner cavity of the flow guide tube (72), the inner cavities of the two flow guide tubes (72) and the horn tube (71) are communicated with the inner cavity of the inner tank (22), and the inner cavities of the two flow guide tubes (72) are communicated with the inner cavity of the filter device (5).

3. The environmentally friendly low-allergenic degumming treatment device for tussah silk according to claim 2, characterized in that: The filtering device (5) comprises an arc-shaped mounting frame (51), wherein the arc-shaped mounting frame (51) is fixedly mounted on the upper end of the mounting frame (1), the inner cavities of the plurality of arc-shaped mounting frames (51) are in communication with the inner cavities of the two flow guide pipes (72), a hydraulic cylinder (52) is arranged in the middle of the outer arc-shaped surface of the arc-shaped mounting frame (51), two protective covers (53) are arranged on the upper part of the arc-shaped mounting frame (51), and a discharge pipe (54) is arranged in the middle of the upper ends of the two protective covers (53), a flow limiting mechanism (55) is arranged in the lower part of the inner cavity of the arc-shaped mounting frame (51), an extraction mechanism (56) is arranged on the lower side of the middle part of the inner cavity of the arc-shaped mounting frame (51), a cleaning member (57) is arranged on the upper side of the middle part of the inner cavity of the arc-shaped mounting frame (51), and filtering members (58) are arranged on both sides of the upper part of the inner cavity of the arc-shaped mounting frame (51).

4. The environmentally friendly low-allergenic degumming treatment device for tussah silk according to claim 3, characterized in that: The current limiting mechanism (55) comprises an arc-shaped plate (551), the arc-shaped plate (551) being fixedly mounted on the lower part of the inner cavity of the arc-shaped mounting frame (51), a plurality of mounting holes (551) being provided in the middle part thereof, two baffles (552) being rotatably mounted on the upper parts of the inner cavities of the plurality of mounting holes (551), and the lower ends of the plurality of baffles (552) being provided with elastic ropes (553) fixedly connected to the lower end of the arc-shaped plate (551).

5. The environmentally friendly low-allergenic degumming treatment device for tussah silk according to claim 3, characterized in that: The extraction mechanism (56) includes an arc plate 2 (561), which is slidably installed in the middle of the inner cavity of the arc-shaped mounting frame (51), and a pull rod (562) is provided in the middle of the arc plate 2 (561). The upper end of the pull rod (562) extends to the upper part of the arc-shaped mounting frame (51), and the upper end of the pull rod (562) is fixedly connected to the output end of the hydraulic cylinder (52). A plurality of mounting plates (563) are provided on both sides of the upper end of the arc plate 2 (561), and a mounting hole 2 is provided in the middle of the arc plate 2 (561). A plug plate (564) is provided in the upper part of the inner cavity of the plurality of mounting holes 2. The plurality of plug plates (564) are respectively slidably installed on the lower end of the mounting plate (563), and the upper ends of the plurality of plug plates (564) are respectively provided with a spring 1 (565) fixedly installed on the lower end of the plurality of mounting plates (563).

6. The environmentally friendly low-allergenic degumming treatment device for tussah silk according to claim 5, characterized in that: The cleaning member (57) comprises an arc frame (571), the arc frame (571) is fixedly mounted in the middle of the inner cavity of the arc mounting frame (51), the middle of the arc frame (571) is slidably connected to the outer surface of the pull rod (562), filter plates (572) are arranged on both sides of the middle of the arc frame (571), cleaning members (573) are slidably mounted on both sides of the lower part of the inner cavity of the arc frame (571), and the two cleaning members (573) are connected to the inner cavity of the arc frame (571). A filter frame (574) is provided on one side of the outer surface. The two filter frames (574) are slidably installed on the inner wall of the arc-shaped installation frame (51). A filter screen 1 is provided on the upper part of the filter frame (574). The filter screen 1 is located on the upper part of the filter plate 1 (572). A push rod (575) is rotatably installed in the middle part of the lower end of the two cleaning parts (573). The lower parts of the two push rods (575) are rotatably installed on the outer surface of the pull rod (562).

7. The environmentally friendly and hypoallergenic degumming treatment device for tussah silk according to claim 6, characterized in that: The cleaning member (573) comprises a cleaning frame (5731), wherein the cleaning frame (5731) is slidably mounted on the lower part of the inner cavity of the arc-shaped frame (571), wherein two cleaning plates (5732) are arranged in the middle part of the inner cavity of the cleaning frame (5731), wherein the two cleaning plates (5732) are adapted for use with the filter plate 1 (572), and a guide frame (5733) is arranged on one side of the lower part of the cleaning frame (5731) close to the filter frame (574), wherein the guide frame (5733) is connected to the corresponding filter frame (574) via a telescopic connecting pipe.

8. The environmentally friendly low-allergenic degumming treatment device for tussah silk according to claim 3, characterized in that: The filter element (58) comprises a placement frame (581), and a second filter screen (582) is arranged in the middle of the inner cavity of the placement frame (581).

9. A production process for producing an environmentally friendly low-allergenic degumming of tussah silk as claimed in any one of claims 1 to 8, characterized in that: The specific steps are as follows: Step 1: Raw material preparation 1. Screening of tussah silk: Select tussah silk raw materials with good quality and no obvious impurities and pests and diseases. Preliminary screening can be carried out based on the thickness uniformity, color, feel and other indicators of the silk. For the cocoon raw materials, it is necessary to check the integrity and thickness of the cocoon layer to ensure the consistency of the subsequent degumming treatment.

2. Pretreatment: Simply clean the selected tussah silk to remove dust, debris and other impurities on the surface. Use gentle water washing and control the water temperature at 30-40°C to avoid excessive water temperature damaging the silk fibers. After washing, dry it naturally or dry it at low temperature (the temperature does not exceed 50°C) to make the moisture content of the tussah silk reach the appropriate range, generally 10% to 15%. Step 2: Preparation of degumming solution 1. Biological enzyme selection: Choose biological enzymes that have a high efficiency in decomposing sericin, such as protease and lipase. Protease can specifically decompose the protein components in sericin, and lipase can act on the fat substances in sericin. The activity and purity of the enzyme must be strictly controlled to ensure its effectiveness in the degumming process.

2. Addition of environmentally friendly additives: Add appropriate amounts of environmentally friendly additives, such as biodegradable surfactants, buffers, etc. Surfactants can enhance the penetration of the degumming solution and make it easier for the enzyme to contact the sericin. Commonly used surfactants are alkyl glycosides. Buffers are used to maintain the pH value of the degumming solution stable. Generally, the pH value is controlled between 6-8 to ensure the best active environment for the biological enzyme.

3. Proportion preparation of degumming liquid: According to the weight of tussah silk and degumming requirements, accurately prepare the ratio of biological enzyme and auxiliary agent in the degumming liquid. Usually the content of biological enzyme is 0.5%~2% (mass fraction), the content of auxiliary agent is 1%~5% (mass fraction), and the rest is water. During the preparation process, it is necessary to stir fully to ensure that all ingredients are evenly mixed. Step 3: Degumming 1. Reactor preparation: Check whether all equipment of the reactor is operating normally, such as the stirring device, heating system, temperature sensor, etc., to ensure that the inside of the reactor is clean and free of residual impurities. Add an appropriate amount of degumming liquid into the reactor, and the amount of degumming liquid should be able to completely immerse the tussah silk.

2. Degumming process: put the pretreated tussah silk into the reactor, turn on the stirring device to fully disperse the tussah silk in the degumming liquid, set up the heating system, and control the reaction temperature at 60-80℃. Too high temperature may cause damage to the silk fibroin, and too low temperature will affect the degumming efficiency. The stirring speed is controlled at 60-100 rpm to ensure that the degumming liquid is in full contact with the tussah silk. The degumming time depends on the variety, thickness and degumming requirements of the tussah silk, generally 1-3 hours. During this process, samples can be taken regularly to observe the degumming effect, such as observing the degree of sericin removal through a microscope, and feeling the softness of the silk by hand.

3. Circulation filtration: During the degumming process, the circulation filtration system is started to continuously extract the degumming liquid in the reactor, remove the sericin fragments, impurities, etc. through the filtration device, and then return it to the reactor. The filtration device can use a multi-layer filter screen, and the filter screen aperture is selected between 5-100 microns according to the size of the impurities to ensure the cleanliness of the degumming liquid and improve the degumming quality. Step 4: Cleaning and Neutralization 1. Cleaning: After degumming, take the tussah silk out of the reactor and put it into the cleaning equipment for cleaning. Use multiple water washing methods to remove the residual degumming liquid and sericin decomposition products. The water temperature can be gradually reduced each time, starting from about 50°C and finally dropping to room temperature. The cleaning time is 10 to 15 minutes each time, and the number of cleaning times is generally 3 to 5 times, until the cleaning water is clear.

2. Neutralization: After cleaning, the tussah silk may still have a certain acidity or alkalinity and needs to be neutralized. You can use a weak alkaline or weak acid neutralizer, such as sodium bicarbonate solution (pH value is about 8-9) or citric acid solution (pH value is about 3-4). Soak the tussah silk in the neutralizer for 5 to 10 minutes to make the pH value of the tussah silk close to neutral (pH value is 6.5-7.5). After neutralization, rinse with clean water 1-2 times to remove the residual neutralizer. Step 5: Drying and finishing 1. Drying: Dry the neutralized and cleaned tussah silk. It can be dried naturally or at low temperature. When drying naturally, choose a well-ventilated place without direct sunlight to prevent the silk from turning yellow and brittle due to exposure to the sun. When drying at low temperature, the temperature is controlled at 50-60℃. The drying time depends on the moisture content and quantity of the silk, generally 2-4 hours. During the drying process, pay attention to turning the tussah silk to make it dry evenly.

2. Finishing: After drying, the tussah silk may become tangled or uneven and needs to be sorted. It can be combed manually or mechanically to make the tussah silk neat and straight. For some products with special requirements, softening treatment, antistatic treatment and other post-finishing processes can also be performed to improve the quality and performance of the tussah silk. Step 6: Quality Inspection 1. Appearance inspection: Observe whether the color of the tussah silk is uniform and white, whether there are defects such as yellow spots and black spots, check whether the surface of the silk is smooth, and whether there are obvious fiber breaks or entanglements.

2. Physical property testing: Test the strength, elongation, moisture regain and other physical indicators of tussah silk. The strength and elongation can be tested by a universal material testing machine, while the moisture regain can be measured by an oven method or a resistance method. Each physical property indicator should comply with relevant standards or customer requirements.

3. Chemical property testing: Detect the content of residual biological enzymes, additives, heavy metals and other chemical substances in tussah silk, and use analytical methods such as high performance liquid chromatography and atomic absorption spectroscopy to ensure that the residual chemical substances are lower than the prescribed safety standards to ensure the environmental protection and low allergenicity of the product.

4. Allergenicity testing: The allergenicity of tussah silk products is tested through animal experiments or human patch tests. The processed tussah silk samples are brought into contact with experimental animals or human skin to observe whether allergic reactions such as redness, swelling, itching, etc. occur. Only products that pass the allergenicity test can be sold on the market.

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