Breathable low-carbon full-bamboo raw fiber shoes and preparation process thereof

Abstract

The invention discloses a breathable low-carbon full-bamboo raw fiber shoe and a preparation process thereof, and particularly relates to the technical field of environment-friendly shoe product preparation, the structure and the preparation process of a vamp, an insole, a shoe insole and a shoe outsole are designed, the vamp is formed by weaving bamboo raw fiber yarn, and the insole is formed by weaving bamboo raw fiber yarn. The insole comprises a natural bamboo fiber cloth layer, a natural bamboo fiber and TPU foaming layer, a natural bamboo fiber thick silk sheet layer and a bottom net which are sequentially arranged from top to bottom, the insole is formed by weaving and bonding natural bamboo fiber precursors, and the outsole is prepared from natural bamboo fiber powder and natural rubber. According to the full-bamboo raw fiber shoe, low carbon and environmental protection are achieved, and meanwhile healthy comfort of antibiosis, deodorization, radiation protection, moisture absorption and breathability is further achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of preparation of environmentally friendly shoe products, and in particular relates to a breathable low-carbon all-bamboo fiber shoe and a preparation process thereof. Background Art

[0002] Bamboo fiber is a natural plant fiber extracted from bamboo, which has various forms, including thick filaments, fine filaments, velvet (spinnable fiber), powder and extracts. These different forms of bamboo fiber have a wide range of applications in many fields due to their unique physical and chemical properties. Thick filaments, fine filaments, velvet (spinnable fiber): These forms of bamboo fiber are mainly used in the textile industry. Thick filaments and fine filaments can be used to develop different types of textiles according to their fiber diameters. Velvet or spinnable fibers are finer and softer, suitable for making high-quality textiles such as clothing, bedding, etc. Powder: Bamboo fiber powder may come from the mechanical or chemical treatment process of bamboo. This form of fiber can be used in a variety of industrial applications, such as reinforcing materials for composite materials or as additives to other materials to improve the performance of products. Extracts: The extracts of bamboo fiber may refer to the chemical components obtained in the process of extracting fibers, such as cellulose, hemicellulose, lignin, etc., which can be used in the chemical industry or as raw materials for other products.

[0003] The physical structure of bamboo fiber is special. It has transverse sections in the longitudinal direction, uneven thickness distribution, and countless fine grooves on the surface. In the transverse direction, bamboo fiber is irregularly oval or round, with a central cavity inside, and the cross section is full of gaps and edge cracks. These structures make bamboo fiber have capillary-like properties, which can quickly absorb and evaporate water, so it is known as "breathing fiber".

[0004] The antibacterial properties of bamboo fiber are very significant. Studies have shown that it has strong antibacterial and bactericidal effects, which are not inferior to other fibers such as flax and ramie. Its antibacterial effect is natural, environmentally friendly, and has a spectral effect. The sodium copper chlorophyll contained in bamboo fiber makes it have a good deodorizing effect. Experiments show that the deodorizing rate of bamboo fiber fabrics for ammonia is 70% to 72%, and the deodorizing efficiency for acid odor is as high as 93% to 95%. At the same time, bamboo fiber fabrics also have a good UV protection effect.

[0005] As people pursue ecological, healthy and environmental protection concepts, bamboo fiber is widely used in clothing fabrics, knitted fabrics, bedding, socks, bath towels and other products, but no shoes made of all bamboo fiber have been manufactured. Therefore, based on the above, the present invention provides a breathable low-carbon all-bamboo fiber shoe and a preparation process thereof, which effectively solves the shortcomings and defects of the prior art by designing the structure and preparation process of the upper, insole, midsole and outsole. Summary of the invention

[0006] The purpose of the present invention is to provide a breathable and low-carbon all-bamboo fiber shoe and a preparation process thereof. By designing the structure and preparation process of the upper, insole, midsole and outsole, while achieving low-carbon and environmental protection, it also further achieves antibacterial and deodorizing, radiation protection, moisture absorption and breathable health and comfort, thereby effectively solving the shortcomings and defects of the prior art.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A breathable low-carbon all-bamboo fiber shoe comprises an upper, an insole, a midsole and an outsole which are arranged in sequence from top to bottom; the insole comprises a bamboo fiber cloth layer, a bamboo fiber and TPU foaming layer, a bamboo fiber coarse wire sheet layer and a bottom net which are arranged in sequence from top to bottom; the midsole is made of bamboo fiber raw silk woven and bonded together; and the outsole is made of bamboo fiber powder and natural rubber.

[0009] Furthermore, the bamboo fiber cloth layer in the insole is 16-count bamboo fiber cloth; the bamboo fiber and TPU foaming layer is made of 30% bamboo fiber powder and 70% TPU foaming elastomer sheet, with a thickness of 3mm; the bamboo fiber coarse silk sheet layer is 5mm thick, and the bottom net is ordinary gauze.

[0010] Furthermore, the shoe upper and the shoe midsole, as well as the shoe midsole and the shoe outsole are sewn and connected using bamboo fiber yarn, and the insole is naturally attached to the shoe midsole.

[0011] A preparation process of breathable low-carbon all-bamboo fiber shoes, comprising the following preparation steps:

[0012] Step 1: Upper preparation:

[0013] According to the upper pattern and process requirements, bamboo fiber yarn is put on the yarn mouth of the flat knitting machine, and the knitting program is introduced into the flat knitting machine;

[0014] The flat knitting machine knits the semi-finished upper body according to the knitting program;

[0015] The semi-finished upper body is placed in a computer embroidery machine, and the computer embroidery machine processes the shoe holes of the semi-finished upper body according to a set program to obtain the upper body;

[0016] Cut off the excess thread on the shoe holes in the upper body;

[0017] Inspect the woven shoe holes until the product becomes a qualified finished product;

[0018] Step 2: Insole preparation:

[0019] Raw material preparation: prepare bamboo fiber cloth, bamboo fiber powder and TPU foamed elastomer sheet, bamboo fiber velvet fiber bundle and low melting point polyurethane fiber adhesive;

[0020] Model design: Design the shape and size of the insole according to the actual needs of the insole and the materials used, using manual drawing or computer-aided design software for design;

[0021] Mold making: convert the shape and size of the insole into a digital CAD file, and make the insole mold according to the CAD file;

[0022] The above four materials are heated and finely bonded, without the need for other glue;

[0023] Material cutting: according to the designed size and the shape made by the mold, cut the bamboo fiber velvet material and fabric into the shape of the insole mold;

[0024] Compression molding: The cut material is placed inside the insole mold for compression molding;

[0025] Drying and shaping: Place the pressed insoles in an oven for drying and shaping to improve the quality and stability of the insoles and effectively avoid deformation of the insoles;

[0026] Step 3: Preparation of midsole:

[0027] Cleaning and drying of raw bamboo fiber;

[0028] Initial extrusion molding;

[0029] Cut to a shape that fits the mold;

[0030] Soak the bamboo fiber raw silk into the prepared polyurethane adhesive container;

[0031] Put it into the mold and heat press it to shape;

[0032] Open mold;

[0033] Passing through the freezer assembly line;

[0034] Inspect the packaging for later use;

[0035] Step 4: Preparation of the outsole:

[0036] Preparation: Mix bamboo fiber powder and natural rubber into sheets;

[0037] Filling: Put the cut sheets into the mold and enter the operation procedure;

[0038] Pressing: After the material fills the mold, the material is made to reach the required hardness, density and strength;

[0039] Demoulding: Remove the molded shoe outsole from the mould.

[0040] Furthermore, in the step 1, the fineness of the bamboo fiber yarn in the preparation of the shoe upper is 2-3dtex, the linear density is ≤2.5tex, the linear density variation coefficient is ≤20.0%, the breaking strength is ≥2.0cN / dtex, the strength variation coefficient is ≤15.0%, the moisture content is ≤10.0%, the oil content is ≤5.0%; the residual rubber rate is ≤5.0%, the appearance and impurities are uniform in color, without stains, metal foreign matter, and foreign fibers.

[0041] Furthermore, in the preparation of the insole in step 2, the bamboo fiber cloth is spinnable bamboo fiber yarn; the bamboo fiber powder is a superfine powder of 200-300 mesh; the molding temperature is 100-120°C, the pressure is 60-90kg, and the mold storage time is 120s; the insole adhesive is a low-melting point polyurethane fiber bundle; the usage of the bamboo fiber and the adhesive low-melting point polyurethane fiber bundle is 95%-92% and 5-8% respectively.

[0042] Furthermore, in the step three, the bamboo fiber raw silk in the preparation of the shoe midsole is a combination of one or more of bamboo fiber thick silk, bamboo fiber thin silk, bamboo fiber velvet, bamboo fiber powder, and bamboo fiber extract; the mass length of the bamboo fiber thick silk is 20-120 mm, the fineness is 4-8 dtex, the coefficient of variation is 15%, the breaking strength is 1.5 cN / dtex, and the coefficient of variation is 20%.

[0043] Furthermore, the soaking time of the bamboo fiber raw silk is 4 to 6 minutes; the hot pressing molding time is 160s to 200s, the temperature is 130 to 180°C, and the pressure is 90 to 120kg; the mold opening time is 240s; the temperature of the freezer assembly line is 8 to 10°C, and the time is 120s.

[0044] Furthermore, in the fourth step of preparing the outsole of the shoe, the particle size of the bamboo fiber ultrafine powder is 150-200 meshes, the bamboo fiber accounts for 30%, the natural rubber accounts for 70%, and the rubber is mixed and stirred; the pressing time is 250s, and the pressure is 15-25kg / cm 2 , the temperature is 180-250℃; the demoulding waiting time is 4-6h.

[0045] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0046] 1. The breathable and low-carbon all-bamboo fiber shoes of the present invention make innovative use of bamboo fiber materials. Bamboo fiber is cellulose fiber extracted from natural bamboo, which is a renewable resource and is biodegradable. Therefore, bamboo fiber is a very environmentally friendly and low-carbon textile material, making the all-bamboo fiber shoes not only environmentally friendly and low-carbon but also having high strength and wear resistance.

[0047] 2. The breathable low-carbon all-bamboo fiber shoes of the present invention have good moisture absorption and air permeability, can help regulate humidity and temperature, are comfortable to wear, and also contain bamboo quinone components. The natural bamboo quinone antibacterial rate reaches 99.8%, and has strong antibacterial and deodorizing effects. In addition, the ultraviolet transmittance of bamboo fiber is less than 0.6%, and has good radiation protection properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0049] Figure 1 A schematic structural diagram of an environmentally friendly shoe provided by an embodiment of the present invention;

[0050] Wherein, the reference numerals are:

[0051] 1: Upper; 2: Insole; 3: Midsole; 4: Outsole. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] Example 1

[0054] This embodiment provides a breathable low-carbon all-bamboo fiber shoe, which includes Figure 1 As shown, a shoe upper 1, an insole 2, a shoe midsole 3, and a shoe outsole 4 are arranged in sequence from top to bottom.

[0055] The upper 1 is woven with bamboo fiber yarn, the insole 2 includes a bamboo fiber cloth layer of 16 bamboo fiber cloths, a bamboo fiber and TPU foaming layer, which are arranged from top to bottom in sequence, using 30% bamboo fiber and 70% TPU foaming layer with a thickness of 3mm, a bamboo fiber coarse silk sheet layer with a thickness of 5mm, and a bottom mesh of ordinary gauze. The midsole 3 is woven and bonded with bamboo fiber raw silk, and the outsole 4 is prepared with bamboo fiber powder and natural rubber. The upper 1 and the midsole 3, as well as the midsole 3 and the outsole 4 are sewn and connected with bamboo fiber yarn, and the insole naturally fits on the midsole.

[0056] This embodiment also provides a preparation process for breathable low-carbon all-bamboo fiber shoes, comprising the following preparation steps:

[0057] Step 1: Upper preparation:

[0058] According to the upper pattern and process requirements, bamboo fiber yarn is put on the yarn mouth of the flat knitting machine, and the knitting program is introduced into the flat knitting machine. The fineness of the bamboo fiber yarn is 2-3dtex, the linear density is ≤2.5tex, the linear density variation coefficient is ≤20.0%, the breaking strength is ≥2.0cN / dtex, the strength variation coefficient is ≤15.0%, the moisture content is ≤10.0%, the oil content is ≤5.0%, the residual glue rate is ≤5.0%, the appearance and impurities are uniform in color, without stains, metal foreign matter, and foreign fibers;

[0059] The flat knitting machine knits the semi-finished upper body according to the knitting program;

[0060] The semi-finished upper body is placed in a computer embroidery machine, and the computer embroidery machine processes the shoe holes of the semi-finished upper body according to a set program to obtain the upper body;

[0061] Cut off the excess thread on the shoe holes in the upper body;

[0062] Inspect the woven shoe holes until the product becomes a qualified finished product;

[0063] Step 2: Insole preparation:

[0064] Raw material preparation: prepare spinnable bamboo fiber yarn, 300 mesh extra-fine bamboo fiber powder and TPU foamed elastomer sheet, bamboo fiber velvet fiber bundle and low-melting-point polyurethane fiber adhesive;

[0065] Model design: Design the shape and size of the insole according to the actual needs of the insole and the materials used, using manual drawing or computer-aided design software for design;

[0066] Mold making: convert the shape and size of the insole into a digital CAD file, and make the insole mold according to the CAD file;

[0067] The above four materials are heated and finely bonded, without the need for other glue;

[0068] Material cutting: according to the designed size and the shape made by the mold, cut the bamboo fiber velvet material and fabric into the shape of the insole mold;

[0069] Compression molding: Place the cut material inside the insole mold at a temperature of 120°C, a pressure of 90kg, and a mold storage time of 120s for compression molding;

[0070] Drying and shaping: Place the pressed insoles in an oven for drying and shaping to improve the quality and stability of the insoles and effectively avoid deformation of the insoles;

[0071] Step 3: Preparation of midsole:

[0072] The bamboo fiber velvet is washed and dried, the mass length of the bamboo fiber velvet is 15-50 mm, the linear density variation coefficient is ≤20.0%, the breaking strength is ≥2.0 cN / dtex, and the strength variation coefficient is ≤15.0%;

[0073] Initial extrusion molding;

[0074] Cut to a shape that fits the mold;

[0075] Soak the bamboo fiber filaments in the prepared polyurethane adhesive container for 6 minutes;

[0076] Put the mold into hot pressing and shaping, the hot pressing time is 200s, the temperature is 180℃, the pressure is 120kg; the mold opening time is 240s;

[0077] Open mold;

[0078] Pass through the freezer assembly line, the freezer assembly line temperature is 10℃, and the duration is 120s. ;

[0079] Inspect the packaging for later use;

[0080] Step 4: Preparation of the outsole:

[0081] Preparation: Mix 200-mesh bamboo fiber powder and natural rubber into sheets, with bamboo fiber accounting for 30% and natural rubber accounting for 70%, and stir and mix them;

[0082] Filling: Put the cut sheets into the mold and enter the operation procedure;

[0083] Pressing: After the material fills the mold, the pressing time is 250s and the pressure is 25kg / cm 2 , the temperature is 250℃, and the pressing is performed;

[0084] Demoulding: Waiting time is 6 hours, and then remove the molded shoe outsole from the mould.

[0085] Example 2

[0086] This embodiment provides a breathable low-carbon all-bamboo fiber shoe, which includes Figure 1 As shown, a shoe upper 1, an insole 2, a shoe midsole 3, and a shoe outsole 4 are arranged in sequence from top to bottom.

[0087] The upper 1 is woven with bamboo fiber yarn, the insole 2 includes a bamboo fiber cloth layer of 16 bamboo fiber cloths, a bamboo fiber and TPU foaming layer, which are arranged from top to bottom in sequence, using 30% bamboo fiber and 70% TPU foaming layer with a thickness of 3mm, a bamboo fiber coarse silk sheet layer with a thickness of 5mm, and a bottom mesh of ordinary gauze. The midsole 3 is woven and bonded with bamboo fiber raw silk, and the outsole 4 is prepared with bamboo fiber powder and natural rubber. The upper 1 and the midsole 3, as well as the midsole 3 and the outsole 4 are sewn and connected with bamboo fiber yarn, and the insole naturally fits on the midsole.

[0088] This embodiment also provides a preparation process for breathable low-carbon all-bamboo fiber shoes, comprising the following preparation steps:

[0089] Step 1: Upper preparation:

[0090] According to the upper pattern and process requirements, bamboo fiber yarn is put on the yarn mouth of the flat knitting machine, and the knitting program is introduced into the flat knitting machine. The fineness of the bamboo fiber yarn is 2-3dtex, the linear density is ≤2.5tex, the linear density variation coefficient is ≤20.0%, the breaking strength is ≥2.0cN / dtex, the strength variation coefficient is ≤15.0%, the moisture content is ≤10.0%, the oil content is ≤5.0%, the residual glue rate is ≤5.0%, the appearance and impurities are uniform in color, without stains, metal foreign matter, and foreign fibers;

[0091] The flat knitting machine knits the semi-finished upper body according to the knitting program;

[0092] The semi-finished upper body is placed in a computer embroidery machine, and the computer embroidery machine processes the shoe holes of the semi-finished upper body according to a set program to obtain the upper body;

[0093] Cut off the excess thread on the shoe holes in the upper body;

[0094] Inspect the woven shoe holes until the product becomes a qualified finished product;

[0095] Step 2: Insole preparation:

[0096] Raw material preparation: prepare spinnable bamboo fiber yarn, 200 mesh extra-fine bamboo fiber powder and TPU foamed elastomer sheet, bamboo fiber velvet fiber bundle and low-melting-point polyurethane fiber adhesive;

[0097] Model design: Design the shape and size of the insole according to the actual needs of the insole and the materials used, using manual drawing or computer-aided design software for design;

[0098] Mold making: convert the shape and size of the insole into a digital CAD file, and make the insole mold according to the CAD file;

[0099] The above four materials are heated and finely bonded, without the need for other glue;

[0100] Material cutting: according to the designed size and the shape made by the mold, cut the bamboo fiber velvet material and fabric into the shape of the insole mold;

[0101] Compression molding: Place the cut material inside the insole mold at a temperature of 100°C, a pressure of 60kg, and a mold storage time of 120s for compression molding;

[0102] Drying and shaping: Place the pressed insoles in an oven for drying and shaping to improve the quality and stability of the insoles and effectively avoid deformation of the insoles;

[0103] Step 3: Preparation of midsole:

[0104] The bamboo fiber raw yarn is washed and dried, wherein the bamboo fiber raw yarn has a mass length of 20 to 120 mm, a fineness of 4 to 8 dtex, a coefficient of variation of 15%, a breaking strength of 1.5 cN / dtex, and a coefficient of variation of 20%;

[0105] Initial extrusion molding;

[0106] Cut to a shape that fits the mold;

[0107] Soak the bamboo fiber filaments in the prepared polyurethane adhesive container for 4 minutes;

[0108] Put the mold into hot pressing and shaping, the hot pressing time is 160s, the temperature is 130℃, the pressure is 90kg; the mold opening time is 240s;

[0109] Open mold;

[0110] Pass through the freezer assembly line, the freezer assembly line temperature is 8℃, and the duration is 120s. ;

[0111] Inspect the packaging for later use;

[0112] Step 4: Preparation of the outsole:

[0113] Preparation: Mix 150 mesh bamboo fiber powder and natural rubber into sheets, with bamboo fiber accounting for 30% and natural rubber accounting for 70%, and stir and mix them;

[0114] Filling: Put the cut sheets into the mold and enter the operation procedure;

[0115] Pressing: After the material fills the mold, the pressing time is 250s and the pressure is 15kg / cm 2 , the temperature is 180℃, and the pressing is performed;

[0116] Demoulding: Waiting time is 4 hours, and then remove the molded shoe outsole from the mould.

[0117] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0118] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A breathable low-carbon all-bamboo fiber shoe, characterized in that: It comprises an upper, an insole, a midsole and an outsole which are arranged in sequence from top to bottom; the insole comprises a bamboo fiber cloth layer, a bamboo fiber and TPU foaming layer, a bamboo fiber coarse silk sheet layer and a bottom mesh which are arranged in sequence from top to bottom; the midsole is made of bamboo fiber raw silk after weaving and bonding; the outsole is made of bamboo fiber powder and natural rubber.

2. The breathable low-carbon all-bamboo fiber shoes according to claim 1, characterized in that: The bamboo fiber fabric layer in the insole is 16-count bamboo fiber fabric; the bamboo fiber and TPU foaming layer is made of 30% bamboo fiber powder and 70% TPU foaming elastomer sheet, with a thickness of 3mm; the bamboo fiber coarse silk sheet layer is 5mm thick, and the bottom net is ordinary gauze.

3. The breathable low-carbon all-bamboo fiber shoes according to claim 1, characterized in that: The upper and the midsole, as well as the midsole and the outsole are sewn together using bamboo fiber yarn, and the insole fits naturally on the midsole.

4. A preparation process of breathable low-carbon all-bamboo fiber shoes, characterized in that: The method comprises the following preparation steps: Step 1: Upper preparation: According to the upper pattern and process requirements, bamboo fiber yarn is put on the yarn mouth of the flat knitting machine, and the knitting program is introduced into the flat knitting machine; The flat knitting machine knits the semi-finished upper body according to the knitting program; The semi-finished upper body is placed in a computer embroidery machine, and the computer embroidery machine processes the shoe holes of the semi-finished upper body according to a set program to obtain the upper body; Cut off the excess thread on the shoe holes in the upper body; Inspect the woven shoe holes until the product becomes a qualified finished product; Step 2: Insole preparation: Raw material preparation: prepare bamboo fiber cloth, bamboo fiber powder, TPU foamed elastomer sheet, bamboo fiber velvet fiber bundle and low melting point polyurethane fiber adhesive; Model design: Design the shape and size of the insole according to the actual needs of the insole and the materials used, using manual drawing or computer-aided design software for design; Mold making: convert the shape and size of the insole into a digital CAD file, and make the insole mold according to the CAD file; The above four materials are heated and finely bonded, without the need for other glue; Material cutting: according to the designed size and the shape made by the mold, cut the bamboo fiber velvet material and fabric into the shape of the insole mold; Compression molding: The cut material is placed inside the insole mold for compression molding; Drying and shaping: Place the pressed insoles in an oven for drying and shaping to improve the quality and stability of the insoles and effectively avoid deformation of the insoles; Step 3: Preparation of midsole: Cleaning and drying of raw bamboo fiber; Initial extrusion molding; Cut to a shape that fits the mold; Soak the bamboo fiber raw silk into the prepared polyurethane adhesive container; Put it into the mold and heat press it to shape; Open mold; Passing through the freezer assembly line; Inspect the packaging for later use; Step 4: Preparation of the outsole: Preparation: Mix bamboo fiber powder and natural rubber into sheets; Filling: Put the cut sheets into the mold and enter the operation procedure; Pressing: After the material fills the mold, the material is made to reach the required hardness, density and strength; Demoulding: Remove the molded shoe outsole from the mould.

5. The preparation process of a breathable low-carbon all-bamboo fiber shoe according to claim 4, characterized in that: In the step 1, the fineness of the bamboo fiber yarn in the preparation of the shoe upper is 2-3dtex, the linear density is ≤2.5tex, the linear density variation coefficient is ≤20.0%, the breaking strength is ≥2.0cN / dtex, the strength variation coefficient is ≤15.0%, the moisture content is ≤10.0%, the oil content is ≤5.0%, the residual glue rate is ≤5.0%, the appearance and impurities are uniform in color, without stains, metal foreign matter, and foreign fibers.

6. The preparation process of a breathable low-carbon all-bamboo fiber shoe according to claim 4, characterized in that: In step 2, the bamboo fiber fabric in the insole preparation is spinnable bamboo fiber yarn; the bamboo fiber powder is a 200-300 mesh ultra-fine powder; the molding temperature is 100-120° C., the pressure is 60-90 kg, and the mold storage time is 120 s; the insole adhesive is a low-melting point polyurethane fiber bundle; the usage of the bamboo fiber and the adhesive low-melting point polyurethane fiber bundle is 95%-92% and 5-8% respectively.

7. The preparation process of a breathable low-carbon all-bamboo fiber shoe according to claim 4, characterized in that: In step 3, the bamboo fiber raw silk in the preparation of the shoe midsole is a combination of one or more of bamboo fiber thick silk, bamboo fiber thin silk, spinnable bamboo fiber, bamboo fiber powder, and bamboo fiber extract; the mass length of the bamboo fiber thick silk is 20-120 mm, the fineness is 4-8 dtex, the coefficient of variation is 15%, the breaking strength is 1.5 cN / dtex, and the coefficient of variation is 20%.

8. The process for preparing the breathable low-carbon all-bamboo fiber shoes according to claim 4, characterized in that: In step 3, in the preparation of the midsole of the shoe, the soaking time of the bamboo fiber raw silk is 4 to 6 minutes; the hot pressing time is 160s to 200s, the temperature is 130 to 180°C, and the pressure is 90 to 120kg; the mold opening time is 240s; the temperature of the freezer assembly line is 8 to 10°C, and the time is 120s.

9. The preparation process of the breathable low-carbon all-bamboo fiber shoes according to claim 4, characterized in that: Step 4: In the preparation of the outsole, the particle size of the bamboo fiber ultra-fine powder is 150-200 mesh, the bamboo fiber accounts for 30%, and the natural rubber accounts for 70%. Stir and mix the rubber; the pressing time is 250s, and the pressure is 15-25kg / cm 2 , the temperature is 180-250℃; the demoulding waiting time is 4-6h.

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