A biodegradable bio-based fabric material and its preparation method

Abstract

This invention discloses a biodegradable bio-based fabric material and its preparation method. The biodegradable bio-based fabric material comprises a surface layer woven from mycelial composite yarn and a bottom layer woven from polylactic acid (PLA) yarn. The mycelial composite yarn consists of mycelial yarn with a ply ratio of 2-4:1 and bio-based nylon 56 yarn, with a denier of 100D-500D, and is formed by S-twist. The PLA yarn consists of 70-90% PLA and 10-30% bio-based PET, and the PLA yarn has a denier of 100D-500D. The mycelial composite yarn and PLA yarn are formed by S-twist using a warp knitting machine to create the biodegradable bio-based fabric. The surface layer and the bottom layer are connected by a traction thread. This invention's biodegradable bio-based fabric material is biodegradable, reducing the use of non-renewable resources. This invention applies renewable mycelial materials to automotive fabrics to meet the needs of automobile use.

Description

Technical Field

[0001] This invention belongs to the field of textile technology, and in particular relates to a biodegradable bio-based fabric material and its preparation method. Background Technology

[0002] With the strengthening of green and healthy development concepts and the requirements of dual-carbon policies, the automotive industry has an increasing demand for biodegradable and recyclable materials. Mycelial materials, as one of the currently popular biodegradable materials, have enormous application prospects. Current applications are mainly in packaging materials, environmentally friendly building materials, and display products, with limited use in the automotive industry. However, due to their low cost, mycelial materials can replace non-renewable resources such as petroleum-based materials.

[0003] Chinese patent application CN 105365145 A discloses a method for preparing molded parts, which includes forming a liquid aggregate from a mixture of ground aggregate and a fluid. A fungal inoculum and the liquid aggregate are injected into a first mold cavity. The first mold cavity is then sealed against a second mold cavity. Live mycelium grows from the fungal inoculum, filling both the first and second mold cavities. The live mycelium is then cured to terminate further growth and become the shaped matrix. However, this patent does not mention the application of the mycelium to fabrics.

[0004] Chinese patent application CN 114127278 A discloses a composite mycelial material comprising: a. a cultivated mycelial material containing one or more clumps of branched mycelium, wherein the clumps of branched mycelium are disrupted; and b. an adhesive. This patented technology applies the mycelium using pressure or adhesive methods, but it is not applied to fabrics.

[0005] Chinese patent application CN 114901902 A discloses a fabric composition of filamentous fungi, and also discloses methods for manufacturing and using such a fabric composition. Various embodiments of this fabric composition typically include at least one plasticizer, polymer, and crosslinking agent in addition to the filamentous fungi. The disclosed fabric composition is particularly effective against analogues or alternatives to conventional fabric compositions, including but not limited to leather, but the fabric is not recyclable.

[0006] Therefore, there is a need to further develop a fabric that combines mycelium with natural and bio-based fibers, applied to textiles to enhance product strength and stability. Furthermore, the materials used are naturally derived and biodegradable, reducing the use of non-renewable resources and aligning with the low-carbon development requirements of the automotive industry. Summary of the Invention

[0007] The first technical problem to be solved by the present invention is to provide a biodegradable bio-based fabric material; the biodegradable bio-based fabric material of the present invention is biodegradable, which reduces the use of non-renewable resources.

[0008] The second technical problem to be solved by the present invention is to provide a method for preparing a biodegradable bio-based fabric material;

[0009] To solve the first technical problem mentioned above, the invention adopts the following technical solution. :

[0010] A biodegradable bio-based fabric material, comprising a surface layer woven from mycelial composite yarns and a bottom layer woven from polylactic acid yarns;

[0011] The mycelium composite yarn is composed of mycelium yarn and bio-based nylon 56 yarn with a ply ratio of 2-4:1. The mycelium yarn and bio-based nylon 56 yarn are both 100D-500D and are made by S-twist.

[0012] The polylactic acid yarn is composed of 70-90% polylactic acid and 10-30% bio-based PET, and the polylactic acid yarn has a density of 100D-500D.

[0013] The mycelium composite yarn and polylactic acid yarn are twisted together by a warp knitting machine to form a biodegradable bio-based fabric.

[0014] The top layer and the bottom layer are connected by a traction line.

[0015] To solve the second technical problem mentioned above, the invention adopts the following technical solution. :

[0016] A method for preparing a biodegradable bio-based fabric material includes the following steps:

[0017] 1) Preparation of mycelium composite yarn

[0018] Mycelium is obtained through fermentation culture of microorganisms. Natural fiber is added during the fermentation process of mycelium, along with one or more of gelatin, natural latex, collagen, cellulose ethers, cellulose esters, and tannin gum.

[0019] Then, the mycelium obtained after fermentation is combed, cleaned, drawn into strips, and twisted to make mycelium yarn;

[0020] Then, the mycelium yarn and bio-based nylon 56 yarn (100D-500D) are twisted together by S-twist to form mycelium composite yarn.

[0021] 2) Preparation of polylactic acid yarn

[0022] The polylactic acid yarn is composed of 70-90% polylactic acid and 10-30% bio-based PET, and the yarn has a density of 100D-500D; the polylactic acid yarn is produced by conventional spinning methods.

[0023] 3) Fabric weaving

[0024] Mycelium composite yarn and polylactic acid yarn are mixed and woven together. The fabric is divided into a face layer, a bottom layer and a middle layer. The face layer is made of mycelium composite yarn and the bottom layer is made of polylactic acid yarn. The fabric is woven using a warp knitting machine. The middle layer is composed of traction lines connecting the face layer and the bottom layer. The warp knitting machine has at least 3 guide bars to obtain a biodegradable bio-based fabric material.

[0025] In one implementation, in step 1), the strain is one or more of the following: oyster mushroom, shiitake mushroom, enoki mushroom, king oyster mushroom, reishi mushroom, and lion's mane mushroom.

[0026] In one implementation, in step 1), the nutrient source for the fermentation culture of the strain is one or more of starch, corn, beans, pectin, glycerol, protein, and dairy products.

[0027] In one embodiment, in step 1), the weight ratio of mycelium to natural fiber is 1-5:0.2-0.5; the natural fiber is one or more of cotton fiber, hemp fiber, bamboo fiber, and soybean fiber.

[0028] In one embodiment, during the preparation of the mycelial yarn in step 1), the cylinder speed is 350-470 r / min, the licker-in speed is 500-750 r / min, and the doffer speed is 27-35 r / min.

[0029] In one implementation method, in step 1), the mycelium is fermented in a dark place at room temperature for 2-10 days, then washed and dried, and then the fermented mycelium is combed, cleaned, drawn into strips, and twisted to make mycelium yarn.

[0030] As one implementation, step 3) also includes a water washing step of the biodegradable bio-based fabric material: the water washing step is carried out in a water washing machine at a water washing temperature of 90-100℃.

[0031] As one implementation method, step 3) also includes a first shaping step for the water-washed biodegradable bio-based fabric material: the first shaping step is carried out in a shaping machine at a temperature of 100-115℃ and a shaping speed of 15-25m / min.

[0032] As one implementation method, step 3) also includes a dyeing step after washing: The dyeing steps are as follows: Dye according to the color requirements, first keep warm at 50-80℃ for 15-40 minutes, then cool down to 40-60℃ and keep warm for 10-20 minutes, and finally cool down to room temperature, wash and dry.

[0033] In one implementation, step 3) also includes a secondary shaping step: the secondary shaping is carried out in a shaping machine at a temperature of 100-115℃ and a shaping speed of 15-25m / min.

[0034] Any range described in this invention includes the endpoint, any value between the endpoints, and any subrange consisting of the endpoint or any value between the endpoints.

[0035] Unless otherwise specified, all raw materials used in this invention can be obtained commercially, and the equipment used in this invention can be conventional equipment in the relevant field or refer to existing technology in the relevant field.

[0036] Compared with the prior art, the present invention has the following beneficial effects. :

[0037] 1. The biodegradable bio-based fabric material of this invention is biodegradable, which reduces the use of non-renewable resources.

[0038] 2. This invention applies renewable mycelium to automotive fabrics to meet the needs of automobiles. Attached Figure Description

[0039] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] Figure 1 This is a schematic diagram of the mycelium composite yarn structure.

[0041] Figure 2 This is a cross-sectional view of the connection structure of the biodegradable bio-based fabric material of the present invention. Detailed Implementation

[0042] To more clearly illustrate the present invention, the following description, in conjunction with preferred embodiments, further clarifies the invention. Those skilled in the art should understand that the specific descriptions below are illustrative rather than restrictive, and should not be construed as limiting the scope of protection of the present invention.

[0043] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0044] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] See Figure 1 and Figure 2 As shown, as one aspect of the present invention, the present invention provides a biodegradable bio-based fabric material 100, comprising a surface layer woven from mycelial composite yarn 10 and a bottom layer woven from polylactic acid yarn 20.

[0047] The mycelium composite yarn 10 is composed of mycelium yarn 11 with a ply ratio of 2-4:1 and bio-based nylon 56 yarn 12, with a ply ratio of 100D-500D, and is made by S-twist.

[0048] The polylactic acid yarn is composed of 70-90% polylactic acid and 10-30% bio-based PET, and the yarn has a density of 100D-500D.

[0049] The mycelium composite yarn and polylactic acid yarn are twisted together by a warp knitting machine to form a biodegradable bio-based fabric.

[0050] The top layer and the bottom layer are connected by a traction line 30.

[0051] In another aspect, the present invention provides a method for preparing a biodegradable bio-based fabric material, comprising the following steps:

[0052] 1) Preparation of mycelium composite yarn

[0053] Mycelium is obtained through fermentation culture of microorganisms. Natural fiber is added during the fermentation process of mycelium, along with one or more of gelatin, natural latex, collagen, cellulose ethers, cellulose esters, and tannin gum.

[0054] Then, the mycelium obtained after fermentation is combed, cleaned, drawn into strips, and twisted to make mycelium yarn;

[0055] Then, the mycelium yarn and bio-based nylon 56 yarn (100D-500D) are twisted together by S-twist to form mycelium composite yarn.

[0056] 2) Preparation of polylactic acid yarn

[0057] The polylactic acid yarn is composed of 70-90% polylactic acid and 10-30% bio-based PET, and the yarn has a density of 100D-500D; the polylactic acid yarn is produced by conventional spinning methods.

[0058] 3) Fabric weaving

[0059] Mycelium composite yarn and polylactic acid yarn are mixed and woven together. The fabric is divided into a face layer, a bottom layer and a middle layer. The face layer is made of mycelium composite yarn and the bottom layer is made of polylactic acid yarn. The fabric is woven using a warp knitting machine. The middle layer is composed of traction lines connecting the face layer and the bottom layer. The warp knitting machine has at least 3 guide bars to obtain a biodegradable bio-based fabric material.

[0060] In some embodiments, in step 1), the strain is one or more of oyster mushrooms, shiitake mushrooms, enoki mushrooms, king oyster mushrooms, reishi mushrooms, and lion's mane mushrooms.

[0061] In some embodiments, in step 1), the nutrient source for the fermentation culture of the strain is one or more of starch, corn, beans, pectin, glycerol, protein, and dairy products.

[0062] In some embodiments, in step 1), the weight ratio of mycelium to natural fiber is 1-5:0.2-0.5; the natural fiber is one or more of cotton fiber, hemp fiber, bamboo fiber, and soybean fiber.

[0063] In some embodiments, during step 1), the cylinder speed is 350-470 r / min, the licker-in speed is 500-750 r / min, and the doffer speed is 27-35 r / min. The mycelial yarn prepared at these speeds is uniform, dense, and has good plyability; the fabric made from the mycelial yarn is smooth, dense, and uniform.

[0064] In some embodiments, in step 1), the mycelium is fermented in a dark place at room temperature for 2-10 days, then washed and dried, and then the fermented mycelium is combed, cleaned, drawn into strips, and twisted to make mycelium yarn.

[0065] In some embodiments, step 3) further includes a water washing step of the biodegradable bio-based fabric material: the water washing step is carried out in a water washing machine at a water washing temperature of 90-100°C.

[0066] In some embodiments, step 3) further includes a first shaping step for the washed biodegradable bio-based fabric material: the first shaping step is carried out in a shaping machine at a temperature of 100-115℃ and a shaping speed of 15-25m / min.

[0067] In some embodiments, step 3) further includes a dyeing step after washing: The dyeing steps are as follows: Dye according to the color requirements, first keep warm at 50-80℃ for 15-40 minutes, then cool down to 40-60℃ and keep warm for 10-20 minutes, and finally cool down to room temperature, wash and dry.

[0068] In some embodiments, step 3) further includes a secondary shaping step: the secondary shaping is carried out in a shaping machine at a temperature of 100-115℃ and a shaping speed of 15-25m / min.

[0069] Example 1

[0070] A biodegradable bio-based fabric material 100 includes a surface layer woven from mycelial composite yarn 10 and a bottom layer woven from polylactic acid yarn 20.

[0071] The mycelium composite yarn 10 is composed of mycelium yarn 11 and bio-based nylon 56 yarn 12 with a ply ratio of 3:1. Both mycelium yarn 11 and bio-based nylon 56 yarn are 100D and are made by S-twist.

[0072] The polylactic acid yarn is composed of 70% polylactic acid and 30% bio-based PET, and the polylactic acid yarn is 100D;

[0073] The mycelium composite yarn 10 and polylactic acid yarn 20 are twisted together by a warp knitting machine to form a biodegradable bio-based fabric 100.

[0074] The top layer and the bottom layer are connected by a traction line 30.

[0075] The preparation method of the above-mentioned biodegradable bio-based fabric material includes the following steps:

[0076] 1) Preparation of mycelium composite yarn

[0077] Mycelium is obtained through fermentation culture of microorganisms. Natural fiber is added during the fermentation process of mycelium, along with gelatin and natural latex.

[0078] Then, the mycelium obtained after fermentation is combed, cleaned, drawn into strips, and twisted to make mycelium yarn;

[0079] Then, the mycelium yarn and bio-based nylon 56 yarn, 100D, are twisted together by S twist to form mycelium composite yarn;

[0080] In step 1), the strains are derived from two sources: oyster mushrooms and shiitake mushrooms.

[0081] In step 1), the nutrient source for the fermentation culture of the strain is starch and corn;

[0082] In step 1), the weight ratio of mycelium to natural fiber is 1:0.2; the natural fiber is cotton fiber.

[0083] In step 1), during the preparation of the mycelial yarn, the cylinder speed is 350 r / min, the licker-in speed is 500 r / min, and the doffer speed is 27 r / min.

[0084] In step 1), the mycelium is fermented in a dark place at room temperature for 2-10 days, then washed and dried. The fermented mycelium is then combed, cleaned, rolled, and twisted to make mycelium yarn.

[0085] 2) Preparation of polylactic acid yarn

[0086] The polylactic acid yarn is composed of 70% polylactic acid and 30% bio-based PET, and the yarn density is 100D. The polylactic acid yarn is produced by conventional spinning methods.

[0087] 3) Fabric weaving

[0088] Mycelium composite yarn and polylactic acid yarn are mixed and woven together. The fabric is divided into a face layer, a bottom layer and a middle layer. The face layer is made of mycelium composite yarn and the bottom layer is made of polylactic acid yarn. The fabric is woven using a warp knitting machine. The middle layer is composed of traction lines connecting the face layer and the bottom layer. The warp knitting machine has at least 3 guide bars to obtain a biodegradable bio-based fabric material.

[0089] Step 3) also includes a step of washing the biodegradable bio-based fabric material: the washing step is carried out in a washing machine at a temperature of 90°C.

[0090] Step 3) also includes the first shaping step of the water-washed biodegradable bio-based fabric material: the first shaping step is carried out in a shaping machine at a temperature of 100℃ and a shaping speed of 15m / min.

[0091] Step 3) also includes a dyeing step after washing: The dyeing steps are as follows: Dye according to the color requirements. First, keep warm at 50℃ for 15 minutes, then cool down to 40℃ and keep warm for 10 minutes. Finally, cool down to room temperature, wash with water and dry.

[0092] Step 3) also includes a secondary shaping step: the secondary shaping is carried out in a shaping machine at a temperature of 100℃ and a shaping speed of 15m / min.

[0093] Tests showed that the biodegradable bio-based fabric material degraded by 60-85% under composting conditions for 6-12 months, as detailed in Table 1 below.

[0094] Example 2

[0095] A biodegradable bio-based fabric material 100 includes a surface layer woven from mycelial composite yarn 10 and a bottom layer woven from polylactic acid yarn 20.

[0096] The mycelium composite yarn 10 is composed of mycelium yarn 11 with a ply ratio of 2-4:1 and bio-based nylon 56 yarn 12, with a density of 500D, and is made by S-twist.

[0097] The mycelium composite yarn 10 and polylactic acid yarn 20 are twisted together by a warp knitting machine to form a biodegradable bio-based fabric 100.

[0098] The polylactic acid yarn is composed of 90% polylactic acid and 10% bio-based PET, and the yarn is 500D.

[0099] The top layer and the bottom layer are connected by a traction line 30.

[0100] The preparation method of the above-mentioned biodegradable bio-based fabric material includes the following steps:

[0101] 1) Preparation of mycelium composite yarn

[0102] Mycelium is obtained through fermentation culture of microorganisms. Natural fiber, collagen and cellulose ether are added during the fermentation process.

[0103] Then, the mycelium obtained after fermentation is combed, cleaned, drawn into strips, and twisted to make mycelium yarn;

[0104] Then, the mycelium yarn and bio-based nylon 56 yarn, 500D, are twisted together by S-twist to form mycelium composite yarn;

[0105] In step 1), the strains are derived from enoki mushrooms and king oyster mushrooms;

[0106] In step 1), the nutrient source for the fermentation culture of the strain is legumes and pectin.

[0107] In step 1), the weight ratio of mycelium to natural fiber is 3:0.35; the natural fiber is hemp fiber.

[0108] In step 1), during the preparation of the mycelial yarn, the cylinder speed is 470 r / min, the licker-in speed is 750 r / min, and the doffer speed is 35 r / min.

[0109] In step 1), the mycelium is fermented in a dark place at room temperature for 10 days, then washed and dried. The fermented mycelium is then combed, cleaned, drawn into strips, and twisted to make mycelium yarn.

[0110] 2) Preparation of polylactic acid yarn

[0111] The polylactic acid yarn is composed of 90% polylactic acid and 10% bio-based PET, and the yarn density is 500D. The polylactic acid yarn is produced by conventional methods.

[0112] 3) Fabric weaving

[0113] Mycelium composite yarn and polylactic acid yarn are mixed and woven together. The fabric is divided into a face layer, a bottom layer and a middle layer. The face layer is made of mycelium composite yarn and the bottom layer is made of polylactic acid yarn. The fabric is woven using a warp knitting machine. The middle layer is composed of traction lines connecting the face layer and the bottom layer. The warp knitting machine has at least 3 guide bars to obtain a biodegradable bio-based fabric material.

[0114] Step 3) also includes a step of washing the biodegradable bio-based fabric material: the washing step is carried out in a washing machine at a temperature of 100°C.

[0115] Step 3) also includes the first shaping step of the water-washed biodegradable bio-based fabric material: the first shaping step is carried out in a shaping machine at a temperature of 115℃ and a shaping speed of 25m / min.

[0116] Step 3) also includes a dyeing step after washing: The dyeing steps are as follows: Dye according to the color requirements. First, keep warm at 80℃ for 40 minutes, then cool down to 60℃ and keep warm for 20 minutes. Finally, cool down to room temperature, wash with water and dry.

[0117] Step 3) also includes a secondary shaping step: the secondary shaping is carried out in a shaping machine at a temperature of 115℃ and a shaping speed of 25m / min.

[0118] Tests showed that the biodegradable bio-based fabric material degraded by 60-85% under composting conditions for 6-12 months, as detailed in Table 1 below.

[0119] Example 3

[0120] A biodegradable bio-based fabric material 100 includes a surface layer woven from mycelial composite yarn 10 and a bottom layer woven from polylactic acid yarn 20.

[0121] The mycelium composite yarn 10 is composed of mycelium yarn 11 with a ply ratio of 4:1 and bio-based nylon 56 yarn 12, with a density of 300D, and is made by S-twist.

[0122] The mycelium composite yarn 10 and polylactic acid yarn 20 are twisted together by a warp knitting machine to form a biodegradable bio-based fabric 100.

[0123] The polylactic acid yarn is composed of 80% polylactic acid and 20% bio-based PET, and the yarn is 300D.

[0124] The top layer and the bottom layer are connected by a traction line 30.

[0125] The preparation method of the above-mentioned biodegradable bio-based fabric material includes the following steps:

[0126] 1) Preparation of mycelium composite yarn

[0127] Mycelium is obtained through fermentation culture of microorganisms. Natural fiber is added during the fermentation process of mycelium, along with one or more of gelatin, natural latex, collagen, cellulose ethers, cellulose esters, and tannin gum.

[0128] Then, the mycelium obtained after fermentation is combed, cleaned, drawn into strips, and twisted to make mycelium yarn;

[0129] Then, the mycelium yarn and bio-based nylon 56 yarn, 300D, are twisted together by S-twist to form mycelium composite yarn;

[0130] In step 1), the strains are derived from Ganoderma lucidum and Hericium erinaceus;

[0131] In step 1), the nutrient source for the fermentation culture of the strain is glycerol and protein;

[0132] In step 1), the weight ratio of mycelium to natural fiber is 4:0.5; the natural fiber is bamboo fiber and soybean fiber.

[0133] In step 1), during the preparation of the mycelial yarn, the cylinder speed is 400 r / min, the licker-in speed is 650 r / min, and the doffer speed is 30 r / min.

[0134] In step 1), the mycelium is fermented in a dark place at room temperature for 6 days, then washed and dried. The fermented mycelium is then combed, cleaned, drawn into strips, and twisted to make mycelium yarn.

[0135] 2) Preparation of polylactic acid yarn

[0136] The polylactic acid yarn is composed of 80% polylactic acid and 20% bio-based PET, and the yarn density is 300D. The polylactic acid yarn is produced by conventional spinning methods.

[0137] 3) Fabric weaving

[0138] Mycelium composite yarn and polylactic acid yarn are mixed and woven together. The fabric is divided into a face layer, a bottom layer and a middle layer. The face layer is made of mycelium composite yarn and the bottom layer is made of polylactic acid yarn. The fabric is woven using a warp knitting machine. The middle layer is composed of traction lines connecting the face layer and the bottom layer. The warp knitting machine has at least 3 guide bars to obtain a biodegradable bio-based fabric material.

[0139] Step 3) also includes a step of washing the biodegradable bio-based fabric material: the washing step is carried out in a washing machine at a temperature of 95°C.

[0140] Step 3) also includes the first shaping step of the water-washed biodegradable bio-based fabric material: the first shaping step is carried out in a shaping machine at a temperature of 105℃ and a shaping speed of 20m / min;

[0141] Step 3) also includes a dyeing step after washing: The dyeing steps are as follows: Dye according to the color requirements. First, keep warm at 65℃ for 30 minutes, then cool down to 50℃ and keep warm for 15 minutes. Finally, cool down to room temperature, wash with water and dry.

[0142] Step 3) also includes a secondary shaping step: the secondary shaping is carried out in a shaping machine at a temperature of 105℃ and a shaping speed of 20m / min.

[0143] Tests showed that the biodegradable bio-based fabric material degraded by 60-85% under composting conditions for 6-12 months, as detailed in Table 1 below.

[0144] Table 1

[0145] Sample Tensile strength Degradation level over 12 months Example 1 260N / 50mm 72％ Example 2 248N / 50mm 82％ Example 3 226N / 50mm 76％

[0146] This invention is not limited to the above-described embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of this invention shall be considered equivalent substitutions and shall be included within the scope of protection of this invention.

[0147] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is impossible to exhaustively list all embodiments here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A biodegradable bio-based fabric material, characterized in that: It includes a top layer made of mycelial composite yarn and a bottom layer made of polylactic acid yarn; The mycelium composite yarn is composed of mycelium yarn with a ply ratio of 2-4:1 and bio-based nylon 56 yarn, with a density of 100D-500D, and is made by S-twist. The polylactic acid yarn is composed of 70-90% polylactic acid and 10-30% bio-based PET, and the polylactic acid yarn has a density of 100D-500D. The mycelium composite yarn and polylactic acid yarn are twisted together by a warp knitting machine to form a biodegradable bio-based fabric. The top layer and the bottom layer are connected by a traction line; The preparation method of the biodegradable bio-based fabric material includes the following steps: 1) Preparation of mycelium composite yarn Mycelium is obtained through fermentation culture of microorganisms. Natural fiber is added during the fermentation process of mycelium, along with one or more of gelatin, natural latex, collagen, cellulose ethers, cellulose esters, and tannin gum. Then, the mycelium obtained after fermentation is combed, cleaned, drawn into strips, and twisted to make mycelium yarn; Then, three strands of mycelial yarn and one strand of bio-based nylon 56 yarn (100D-500D) are twisted together using an S-twist technique to create a mycelial composite yarn. 2) Preparation of polylactic acid yarn Polylactic acid yarn is composed of 80% polylactic acid and 20% bio-based PET, with a yarn size of 100D-500D; polylactic acid yarn is produced by conventional spinning methods. 3) Fabric weaving Mycelium composite yarn and polylactic acid yarn are mixed and woven together. The fabric is divided into a face layer, a bottom layer and a middle layer. The face layer is made of mycelium composite yarn and the bottom layer is made of polylactic acid yarn. The fabric is woven using a warp knitting machine. The middle layer is composed of traction lines connecting the face layer and the bottom layer. The warp knitting machine has at least 3 guide bars to obtain a biodegradable bio-based fabric material. In step 1), the source of the fungal strain is one or more of the following: oyster mushroom, shiitake mushroom, enoki mushroom, king oyster mushroom, reishi mushroom, and lion's mane mushroom; In step 1), the weight ratio of mycelium to natural fiber is 1-5:0.2-0.5; the natural fiber is one or more of cotton fiber, hemp fiber, bamboo fiber, and soybean fiber.

2. The biodegradable bio-based fabric material according to claim 1, characterized in that: In step 1), the nutrient source for the fermentation culture of the strain is one or more of starch, corn, beans, pectin, glycerol, protein, and dairy products.

3. The biodegradable bio-based fabric material according to claim 1, characterized in that: In step 1), when preparing the mycelial yarn, the cylinder speed is 350-470 r / min, the licker-in speed is 500-750 r / min, and the doffer speed is 27-35 r / min.

4. The biodegradable bio-based fabric material according to claim 1, characterized in that: In step 1), the mycelium is fermented in a dark place at room temperature for 2-10 days, then washed and dried. The fermented mycelium is then combed, cleaned, rolled, and twisted to make mycelium yarn.

5. The biodegradable bio-based fabric material according to claim 1, characterized in that: Step 3) also includes a step of washing the biodegradable bio-based fabric material: the washing step is carried out in a washing machine at a temperature of 90-100℃.

6. The biodegradable bio-based fabric material according to claim 5, characterized in that: Step 3) also includes the first setting step of the biodegradable bio-based fabric material after washing: the first setting step is carried out in a setting machine at a temperature of 100-115℃ and a setting speed of 15-25m / min.

7. The biodegradable bio-based fabric material according to claim 6, characterized in that: Step 3) also includes a dyeing step after washing: The dyeing steps are as follows: Dye according to the color requirements. First, keep warm at 50-80℃ for 15-40 minutes, then cool down to 40-60℃ and keep warm for 10-20 minutes. Finally, cool down to room temperature, wash with water and dry.

8. The biodegradable bio-based fabric material according to claim 6, characterized in that: Step 3) also includes a secondary shaping step: the secondary shaping is carried out in a shaping machine at a temperature of 100-115℃ and a shaping speed of 15-25m / min.

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