High-density knitted fabric and preparation method thereof
By using sweet almond oil, bridge oil, and red pine nut oil combined with modified liquid to modify bamboo fiber yarn, high-density knitted fabrics are prepared and plant dyed, the problem of low color fastness of plant dye dye fabrics is solved. , achieving high color fastness and durability of the fabric.
Patent Information
- Application Number
- CN202411809073.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-02-14
AI Technical Summary
The color fastness of the fabric dyed with plant dyes is low, resulting in a decrease in the durability of the fabric and is difficult to meet consumer needs.
The bamboo fiber yarn is modified using a modified liquid made of sweet almond oil, bridge oil and red pine nut oil to prepare high-density knitted fabrics and dyed them with plant dyes.
It significantly improves the color fastness of the fabrics dyed by plant dyes, making the fabrics more durable, have high economic value, and are more friendly to the human body and the environment.
Smart Images
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Abstract
Description
Technical Field
[0001] The invention relates to the field of textile fabrics, in particular to a high-density knitted fabric and a preparation method thereof. Background Art
[0002] Fabric is one of the main raw materials for making clothes. Clothes made from dyed fabrics are more beautiful and more popular with consumers.
[0003] Dyes are needed for dyeing, which are mainly divided into chemical dyes and plant dyes. Chemical dyes have the advantage of high color fastness, but chemical dyes contain a large amount of chemical solvents, which leads to chemical residues in the fabric, which is not friendly to the human body or the environment. Plant dyes are natural ingredients with low environmental pollution and are more friendly to the human body. Therefore, the proportion of plant dyes used is increasing.
[0004] Although plant dyes are more friendly to the human body, their color fastness is low. Fabrics dyed with plant dyes are more likely to fade, resulting in reduced durability of the fabrics, making it difficult to meet the needs of consumers. Therefore, there is still room for improvement. Summary of the invention
[0005] In order to improve the color fastness of fabrics after being dyed with plant dyes, the present application provides a high-density knitted fabric and a preparation method thereof.
[0006] In a first aspect, the present application provides a method for preparing a high-density knitted fabric, using the following technical solution: A method for preparing a high-density knitted fabric comprises the following steps: Step 1), modifying the bamboo fiber yarn with a modifying liquid to obtain modified bamboo fiber yarn; Step 2), weaving the modified bamboo fiber yarn to form a prefabricated fabric; Step 3), pre-shrinking and shaping the prefabricated fabric to obtain a pre-treated fabric; Step 4), dyeing the pretreated fabric with plant dyes, and obtaining a high-density knitted fabric after drying; The modified liquid is a compound of solvent, sweet almond oil, brich fruit oil and red pine nut oil.
[0007] By adopting the above technical scheme, the bamboo fiber yarn is modified by using a modifying liquid compounded with sweet almond oil, bridge fruit oil and red pine nut oil, so that the fabric made of the modified bamboo fiber yarn has better color fixing ability for plant dyes, and the color fastness of the high-density knitted fabric is significantly improved, so that the fabric can be more friendly to the human body and the environment, and at the same time have higher color fastness, thereby making the fabric more durable and having higher economic value.
[0008] Preferably, the mass ratio of the solvent, sweet almond oil, bridge fruit oil and red pine nut oil is 100:3-4:1-2:2-3.
[0009] By adopting the above technical scheme, by specifically selecting the mass ratio of the solvent, sweet almond oil, bridge fruit oil and red pine nut oil, the various ingredients are matched in a specific ratio to produce a better synergistic effect, and the modification effect on the bamboo fiber yarn is better, so that the high-density knitted fabric has higher color fastness after being dyed with plant dyes.
[0010] Preferably, the solvent is ethanol.
[0011] By adopting the above technical solution and specifically selecting ethanol as the solvent, the pollution to the environment can be reduced and at the same time a better modification effect can be ensured.
[0012] Preferably, in the step 1), the bamboo fiber yarn is put into the modification liquid, kept at a constant temperature of 60-70° C., soaked for 40-45 hours, filtered and dried to obtain the modified bamboo fiber yarn.
[0013] By adopting the above technical solution, by specifically selecting a constant temperature of 60-70°C and soaking for 40-45 hours, the modification effect is better, and the obtained high-density knitted fabric has higher color fastness after being dyed with plant dyes.
[0014] Preferably, in step 1), the mass ratio of the bamboo fiber yarn to the modified liquid is 1:1-2.
[0015] By adopting the above technical scheme and specifically selecting the mass ratio of bamboo fiber yarn and modifying liquid, the modification effect is better, while the waste of modifying liquid is reduced, the cost is effectively controlled, and the economic value is higher.
[0016] Preferably, in step 2), a knitting process is used to weave the prefabricated fabric.
[0017] By adopting the above technical solution and specifically selecting the knitting process, the high-density knitted fabric woven is more beautiful and has higher structural stability.
[0018] Preferably, the modified bamboo fiber yarn has a specification of 32 counts.
[0019] By adopting the above technical solution and specifically selecting the modified bamboo fiber yarn with a specification of 32 counts, the strength of the high-density knitted fabric can be better improved, making the high-density knitted fabric less prone to damage and more durable.
[0020] In a second aspect, the present application provides a high-density knitted fabric, which adopts the following technical solution: A high-density knitted fabric is prepared by the above-mentioned preparation method of the high-density knitted fabric.
[0021] By adopting the above technical scheme, the high-density knitted fabric can have higher color fastness after being dyed with plant dyes, and the high-density knitted fabric has a stable structure and high strength, so that the high-density knitted fabric is very durable and has high economic value.
[0022] In summary, this application has the following beneficial effects: 1. Since the present application uses a modifying liquid compounded from sweet almond oil, bridge fruit oil and red pine nut oil to modify the bamboo fiber yarn, the fabric made from the modified bamboo fiber yarn has better color fixation ability for plant dyes, and the color fastness of the high-density knitted fabric is significantly improved, making the fabric more friendly to the human body and the environment, and at the same time having higher color fastness, thereby making the fabric more durable and having higher economic value.
[0023] 2. In the present application, it is preferred to specifically select the mass ratio of the solvent, sweet almond oil, bridge fruit oil, and red pine nut oil so that the various ingredients are matched in a specific ratio to produce a better synergistic effect, thereby achieving a better modification effect on the bamboo fiber yarn, thereby making the high-density knitted fabric have higher color fastness after being dyed with plant dyes.
[0024] 3. In the present application, it is preferred to specifically select a constant temperature of 60-70°C and soak for 40-45 hours to achieve a better modification effect, and the obtained high-density knitted fabric has higher color fastness after being dyed with plant dyes. DETAILED DESCRIPTION
[0025] The present application is further described in detail below in conjunction with embodiments.
[0026] Example 1 A method for preparing a high-density knitted fabric comprises the following steps: Step 1), 10kg ethanol, 0.3kg sweet almond oil, 0.1kg bridge fruit oil, and 0.2kg red pine nut oil are mixed evenly to obtain a modified liquid, and then 1kg bamboo fiber yarn is put into 1kg of the modified liquid, kept at a constant temperature of 60°C, soaked for 40h, the bamboo fiber yarn is filtered out through a filter cloth, and dried in the shade to obtain a modified bamboo fiber yarn.
[0027] Step 2), the modified bamboo fiber yarn is woven through a knitting process to form a prefabricated fabric.
[0028] Step 3), soaking the prefabricated fabric in clean water for 3 hours for pre-shrinkage treatment, and then performing low-temperature shaping at 120° C. to obtain the pretreated fabric.
[0029] Step 4), the pretreated fabric cooled to room temperature is immersed in the plant dye for 1 hour for dyeing, and after dyeing, it is placed in a drying room and dried at 80°C, and then washed with clean water until the washing water is colorless, and rolled up after drying at 80°C to obtain a high-density knitted fabric.
[0030] Ethanol is commercially available, CAS No.: 64-17-5, concentration: 75%.
[0031] Sweet almond oil was purchased from the Hongxing Natural Medicinal Spice Oil Factory in Jishui County and was physically cold-pressed.
[0032] Bridge fruit oil was purchased from Jining Tangyi Chemical Co., Ltd. and is physically cold-pressed.
[0033] Red pine nut oil was purchased from Ji'an Huatianbao Chinese Herbal Medicine Biological Products Factory and is physically cold-pressed.
[0034] The bamboo fiber yarn was purchased from Qingdao Huixin Jiye Textile Co., Ltd. with a specification of 32 counts.
[0035] The plant dye is an aqueous solution of curcumin, and the curcumin was purchased from Shaanxi Chenming Biotechnology Co., Ltd.
[0036] The mass ratio of curcumin to water is 1:10. The curcumin and water are evenly mixed in proportion to obtain the plant dye.
[0037] Example 2 A method for preparing a high-density knitted fabric comprises the following steps: Step 1), 10kg ethanol, 0.35kg sweet almond oil, 0.15kg bridge fruit oil, and 0.25kg red pine nut oil are mixed evenly to obtain a modified liquid, and then 1kg bamboo fiber yarn is put into 1.5kg modified liquid, kept at a constant temperature of 65°C, soaked for 42.5h, the bamboo fiber yarn is filtered out through a filter cloth, and dried in the shade to obtain a modified bamboo fiber yarn.
[0038] Step 2), the modified bamboo fiber yarn is woven through a knitting process to form a prefabricated fabric.
[0039] Step 3), soaking the prefabricated fabric in clean water for 3 hours for pre-shrinkage treatment, and then performing low-temperature shaping at 120° C. to obtain the pretreated fabric.
[0040] Step 4), the pretreated fabric cooled to room temperature is put into plant dyes for dyeing, and after dyeing, it is put into a drying room and dried at 80°C, and then washed with clean water until the washing water is colorless, and rolled up after drying at 80°C to obtain a high-density knitted fabric.
[0041] Ethanol is commercially available, CAS No.: 64-17-5, concentration: 75%.
[0042] Sweet almond oil was purchased from the Hongxing Natural Medicinal Spice Oil Factory in Jishui County and was physically cold-pressed.
[0043] Bridge fruit oil was purchased from Jining Tangyi Chemical Co., Ltd. and is physically cold-pressed.
[0044] Red pine nut oil was purchased from Ji'an Huatianbao Chinese Herbal Medicine Biological Products Factory and is physically cold-pressed.
[0045] The bamboo fiber yarn was purchased from Qingdao Huixin Jiye Textile Co., Ltd. with a specification of 32 counts.
[0046] The plant dye is butterfly pea pollen aqueous solution, and the butterfly pea pollen was purchased from Xi'an Green Biotechnology Co., Ltd.
[0047] The mass ratio of butterfly pea pollen to water is 1:10. The butterfly pea pollen and water are evenly mixed according to the proportion to obtain the plant dye.
[0048] Example 3 A method for preparing a high-density knitted fabric comprises the following steps: Step 1), 10kg ethanol, 0.4kg sweet almond oil, 0.2kg bridge fruit oil, and 0.3kg red pine nut oil are mixed evenly to obtain a modified liquid, and then 1kg bamboo fiber yarn is put into 2kg of the modified liquid, kept at a constant temperature of 70°C, soaked for 45h, the bamboo fiber yarn is filtered out through a filter cloth, and dried in the shade to obtain a modified bamboo fiber yarn.
[0049] Step 2), the modified bamboo fiber yarn is woven through a knitting process to form a prefabricated fabric.
[0050] Step 3), soaking the prefabricated fabric in clean water for 3 hours for pre-shrinkage treatment, and then performing low-temperature shaping at 120° C. to obtain the pretreated fabric.
[0051] Step 4), the pretreated fabric cooled to room temperature is put into plant dyes for dyeing, and after dyeing, it is put into a drying room and dried at 80°C, and then washed with clean water until the washing water is colorless, and rolled up after drying at 80°C to obtain a high-density knitted fabric.
[0052] Ethanol is commercially available, CAS No.: 64-17-5, concentration: 75%.
[0053] Sweet almond oil was purchased from the Hongxing Natural Medicinal Spice Oil Factory in Jishui County and was physically cold-pressed.
[0054] Bridge fruit oil was purchased from Jining Tangyi Chemical Co., Ltd. and is physically cold-pressed.
[0055] Red pine nut oil was purchased from Ji'an Huatianbao Chinese Herbal Medicine Biological Products Factory and is physically cold-pressed.
[0056] The bamboo fiber yarn was purchased from Qingdao Huixin Jiye Textile Co., Ltd. with a specification of 32 counts.
[0057] The plant dye is an aqueous solution of mulberry red pigment, and the mulberry red pigment was purchased from Nanjing Tongying Biotechnology Co., Ltd.
[0058] The mass ratio of mulberry red pigment to water is 1:10. Mix the mulberry red pigment and water evenly in proportion to obtain the plant dye.
[0059] Comparative Example 1 A method for preparing a high-density knitted fabric comprises the following steps: Step 1), 10kg ethanol, 0.35kg safflower seed oil, 0.15kg bridge fruit oil, and 0.25kg red pine nut oil are mixed evenly to obtain a modified liquid, and then 1kg bamboo fiber yarn is put into 1.5kg modified liquid, kept at a constant temperature of 65°C, soaked for 42.5h, the bamboo fiber yarn is filtered out through a filter cloth, and dried in the shade to obtain a modified bamboo fiber yarn.
[0060] Step 2), the modified bamboo fiber yarn is woven through a knitting process to form a prefabricated fabric.
[0061] Step 3), soaking the prefabricated fabric in clean water for 3 hours for pre-shrinkage treatment, and then performing low-temperature shaping at 120° C. to obtain the pretreated fabric.
[0062] Step 4), the pretreated fabric cooled to room temperature is put into plant dyes for dyeing, and after dyeing, it is put into a drying room and dried at 80°C, and then washed with clean water until the washing water is colorless, and rolled up after drying at 80°C to obtain a high-density knitted fabric.
[0063] Ethanol is commercially available, CAS No.: 64-17-5, concentration: 75%.
[0064] Safflower seed oil was purchased from Ji'an Zhongda Natural Plant Spice Co., Ltd. and is physically cold-pressed.
[0065] Bridge fruit oil was purchased from Jining Tangyi Chemical Co., Ltd. and is physically cold-pressed.
[0066] Red pine nut oil was purchased from Ji'an Huatianbao Chinese Herbal Medicine Biological Products Factory and is physically cold-pressed.
[0067] The bamboo fiber yarn was purchased from Qingdao Huixin Jiye Textile Co., Ltd. with a specification of 32 counts.
[0068] The plant dye is butterfly pea pollen aqueous solution, and the butterfly pea pollen was purchased from Xi'an Green Biotechnology Co., Ltd.
[0069] The mass ratio of butterfly pea pollen to water is 1:10. The butterfly pea pollen and water are evenly mixed according to the proportion to obtain the plant dye.
[0070] Comparative Example 2 A method for preparing a high-density knitted fabric comprises the following steps: Step 1), 10kg ethanol, 0.35kg sweet almond oil, 0.15kg camellia oil, and 0.25kg red pine nut oil are mixed evenly to obtain a modified liquid, and then 1kg bamboo fiber yarn is put into 1.5kg modified liquid, kept at a constant temperature of 65°C, soaked for 42.5h, the bamboo fiber yarn is filtered out through a filter cloth, and dried in the shade to obtain a modified bamboo fiber yarn.
[0071] Step 2), the modified bamboo fiber yarn is woven through a knitting process to form a prefabricated fabric.
[0072] Step 3), soaking the prefabricated fabric in clean water for 3 hours for pre-shrinkage treatment, and then performing low-temperature shaping at 120° C. to obtain the pretreated fabric.
[0073] Step 4), the pretreated fabric cooled to room temperature is put into plant dyes for dyeing, and after dyeing, it is put into a drying room and dried at 80°C, and then washed with clean water until the washing water is colorless, and rolled up after drying at 80°C to obtain a high-density knitted fabric.
[0074] Ethanol is commercially available, CAS No.: 64-17-5, concentration: 75%.
[0075] Sweet almond oil was purchased from the Hongxing Natural Medicinal Spice Oil Factory in Jishui County and was physically cold-pressed.
[0076] Camellia oil is purchased from Hangzhou Luhao Technology Co., Ltd. and is physically cold-pressed.
[0077] Red pine nut oil was purchased from Ji'an Huatianbao Chinese Herbal Medicine Biological Products Factory and is physically cold-pressed.
[0078] The bamboo fiber yarn was purchased from Qingdao Huixin Jiye Textile Co., Ltd. with a specification of 32 counts.
[0079] The plant dye is butterfly pea pollen aqueous solution, and the butterfly pea pollen was purchased from Xi'an Green Biotechnology Co., Ltd.
[0080] The mass ratio of butterfly pea pollen to water is 1:10. The butterfly pea pollen and water are evenly mixed according to the proportion to obtain the plant dye.
[0081] Comparative Example 3 A method for preparing a high-density knitted fabric comprises the following steps: Step 1), 10kg ethanol, 0.35kg sweet almond oil, 0.15kg bridge fruit oil, and 0.25kg linseed oil are mixed evenly to obtain a modified liquid, and then 1kg bamboo fiber yarn is put into 1.5kg modified liquid, kept at a constant temperature of 65°C, soaked for 42.5h, the bamboo fiber yarn is filtered out through a filter cloth, and dried in the shade to obtain a modified bamboo fiber yarn.
[0082] Step 2), the modified bamboo fiber yarn is woven through a knitting process to form a prefabricated fabric.
[0083] Step 3), soaking the prefabricated fabric in clean water for 3 hours for pre-shrinkage treatment, and then performing low-temperature shaping at 120° C. to obtain the pretreated fabric.
[0084] Step 4), the pretreated fabric cooled to room temperature is put into plant dyes for dyeing, and after dyeing, it is put into a drying room and dried at 80°C, and then washed with clean water until the washing water is colorless, and rolled up after drying at 80°C to obtain a high-density knitted fabric.
[0085] Ethanol is commercially available, CAS No.: 64-17-5, concentration: 75%.
[0086] Sweet almond oil was purchased from the Hongxing Natural Medicinal Spice Oil Factory in Jishui County and was physically cold-pressed.
[0087] Bridge fruit oil was purchased from Jining Tangyi Chemical Co., Ltd. and is physically cold-pressed.
[0088] Flaxseed oil was purchased from Jianmin Natural Spice Oil Factory in Jishui County and was physically cold-pressed.
[0089] The bamboo fiber yarn was purchased from Qingdao Huixin Jiye Textile Co., Ltd. with a specification of 32 counts.
[0090] The plant dye is butterfly pea pollen aqueous solution, and the butterfly pea pollen was purchased from Xi'an Green Biotechnology Co., Ltd.
[0091] The mass ratio of butterfly pea pollen to water is 1:10. The butterfly pea pollen and water are evenly mixed according to the proportion to obtain the plant dye.
[0092] Comparative Example 4 A method for preparing a high-density knitted fabric comprises the following steps: Step 1), 10kg ethanol, 0.35kg safflower oil, 0.15kg camellia oil, and 0.25kg linseed oil are mixed evenly to obtain a modified liquid, and then 1kg bamboo fiber yarn is put into 1.5kg modified liquid, kept at a constant temperature of 65°C, soaked for 42.5h, the bamboo fiber yarn is filtered out through a filter cloth, and dried in the shade to obtain a modified bamboo fiber yarn.
[0093] Step 2), the modified bamboo fiber yarn is woven through a knitting process to form a prefabricated fabric.
[0094] Step 3), soaking the prefabricated fabric in clean water for 3 hours for pre-shrinkage treatment, and then performing low-temperature shaping at 120° C. to obtain the pretreated fabric.
[0095] Step 4), the pretreated fabric cooled to room temperature is put into plant dyes for dyeing, and after dyeing, it is put into a drying room and dried at 80°C, and then washed with clean water until the washing water is colorless, and rolled up after drying at 80°C to obtain a high-density knitted fabric.
[0096] Ethanol is commercially available, CAS No.: 64-17-5, concentration: 75%.
[0097] Safflower seed oil was purchased from Ji'an Zhongda Natural Plant Spice Co., Ltd. and is physically cold-pressed.
[0098] Camellia oil is purchased from Hangzhou Luhao Technology Co., Ltd. and is physically cold-pressed.
[0099] Flaxseed oil was purchased from Jianmin Natural Spice Oil Factory in Jishui County and was physically cold-pressed.
[0100] The bamboo fiber yarn was purchased from Qingdao Huixin Jiye Textile Co., Ltd. with a specification of 32 counts.
[0101] The plant dye is butterfly pea pollen aqueous solution, and the butterfly pea pollen was purchased from Xi'an Green Biotechnology Co., Ltd.
[0102] The mass ratio of butterfly pea pollen to water is 1:10. The butterfly pea pollen and water are evenly mixed according to the proportion to obtain the plant dye.
[0103] Comparative Example 5 A method for preparing a high-density knitted fabric comprises the following steps: Step 1), the modified bamboo fiber yarn is woven through a knitting process to form a prefabricated fabric.
[0104] Step 2), soaking the prefabricated fabric in clean water for 3 hours for pre-shrinkage treatment, and then performing low-temperature shaping at 120° C. to obtain the pretreated fabric.
[0105] Step 3), the pretreated fabric cooled to room temperature is put into plant dyes for dyeing, and after dyeing, it is put into a drying room and dried at 80°C, and then washed with clean water until the washing water is colorless, and rolled up after drying at 80°C to obtain a high-density knitted fabric.
[0106] The bamboo fiber yarn was purchased from Qingdao Huixin Jiye Textile Co., Ltd. with a specification of 32 counts.
[0107] The plant dye is butterfly pea pollen aqueous solution, and the butterfly pea pollen was purchased from Xi'an Green Biotechnology Co., Ltd.
[0108] The mass ratio of butterfly pea pollen to water is 1:10. The butterfly pea pollen and water are evenly mixed according to the proportion to obtain the plant dye.
[0109] Experiment 1 The high-density knitted fabrics prepared in the embodiments and comparative examples were cut into test samples, and the water color fastness and perspiration color fastness of the test samples were tested.
[0110] The testing standards are as follows: GB / T5713-2013 "Textiles - Tests for Colour Fastness to Water" uses the grey scale for colour change assessment to evaluate the colour change grade. The grey scale for colour change assessment complies with the provisions of GB / T250-2008 "Textiles - Tests for Colour Fastness - Grey Scale for Colour Change Assessment".
[0111] According to GB / T3922-2013 "Textiles - Tests for Color Fastness - Color Fastness to Perspiration", the gray scale for evaluating color change is used to evaluate the color change grade. The gray scale for evaluating color change complies with the provisions of GB / T250-2008 "Textiles - Tests for Color Fastness - Gray Scale for Assessing Color Change".
[0112] The specific test data of Experiment 1 are shown in Table 1.
[0113] Table 1 According to the data comparison of each embodiment and the comparative example in Table 1, it can be obtained that the water fastness and sweat fastness of each embodiment are significantly higher than those of the comparative examples. It can be seen that after the bamboo fiber is modified by the modified liquid prepared by the sweet almond oil, bridge fruit oil and red pine nut oil, the color fastness of the fabric dyed with plant dyes can be significantly improved, so that the fabric is not easy to fade, durable, and has higher economic value.
[0114] In Comparative Examples 1-4, other vegetable oils are used to replace the sweet almond oil, bridge fruit oil, and red pine nut oil in each embodiment alone or in whole, and the color fastness is significantly reduced. Although the color fastness is better than that of Comparative Example 5, it is proved that it has a certain effect of improving the color fastness, but the improvement effect is far less than that of each embodiment. It can be seen that the special compound of sweet almond oil, bridge fruit oil, and red pine nut oil has a significant effect on improving the color fastness of fabrics dyed with plant dyes.
[0115] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.
Claims
1. A method for preparing a high-density knitted fabric, characterized in that: The following steps are involved: Step 1), modifying the bamboo fiber yarn with a modifying liquid to obtain modified bamboo fiber yarn; Step 2), weaving the modified bamboo fiber yarn into a prefabricated fabric; Step 3), pre-shrinking and shaping the prefabricated fabric to obtain the pre-treated fabric; Step 4), dyeing the pretreated fabric with plant dyes, and obtaining a high-density knitted fabric after drying; The modified liquid is a compound of solvent, sweet almond oil, brich fruit oil and red pine nut oil.
2. The method for preparing a high-density knitted fabric according to claim 1, characterized in that: The mass ratio of the solvent, sweet almond oil, bridge fruit oil and red pine nut oil is 100:3-4:1-2:2-3.
3. The method for preparing a high-density knitted fabric according to claim 2, characterized in that: The solvent is ethanol.
4. The method for preparing a high-density knitted fabric according to claim 3, characterized in that: In the step 1), the bamboo fiber yarn is put into the modification liquid, kept at a constant temperature of 60-70° C., soaked for 40-45 hours, filtered and dried to obtain the modified bamboo fiber yarn.
5. The method for preparing a high-density knitted fabric according to claim 4, characterized in that: In the step 1), the mass ratio of the bamboo fiber yarn to the modified liquid is 1:1-2.
6. The method for preparing a high-density knitted fabric according to claim 1, characterized in that: In the step 2), a knitting process is adopted to form the prefabricated fabric.
7. The method for preparing a high-density knitted fabric according to claim 6, characterized in that: The modified bamboo fiber yarn has a specification of 32 counts.
8. A high-density knitted fabric, characterized in that: The high-density knitted fabric is prepared by the preparation method of any one of claims 1 to 7.