CN109662356B

CN109662356B - Natural corn cotton cup

Info

Publication number: CN109662356B
Application number: CN201811543818.2A
Authority: CN
Inventors: 黄福开; 杨恬; 林壮丰; 郑燕玉; 孟雄飞; 邱锦钊; 翁创杰
Original assignee: Hongjie Underwear Co ltd
Current assignee: Hongjie Underwear Co ltd
Priority date: 2018-12-17
Filing date: 2018-12-17
Publication date: 2021-03-26
Anticipated expiration: 2038-12-17
Also published as: CN109662356A

Abstract

The invention relates to the technical field of bra underwear, in particular to a natural corn cotton cup, which comprises two symmetrically arranged cups, wherein each cup comprises a first cotton cloth layer, a first corn cotton layer, a second corn cotton layer, an adhesive net layer, a third corn cotton layer and a second cotton cloth layer which are sequentially connected from outside to inside; the first corn cotton layer, the second corn cotton layer and the third corn cotton layer are all made of corn fibers by spinning; one side of the cup, which is far away from the heart of the chicken, is provided with a hand-pushing part, and the hand-pushing part is formed by compression molding of a third corn cotton layer. The corn cotton cup is breathable and comfortable, has better support property, flexibility and antibacterial property, is prepared by processing natural corn, has high material degradation rate, is buried in soil for degradation, directly enters soil organic matters or is absorbed by plants due to carbon dioxide and water generated by degradation, is beneficial to fertilization and nutrient supply of the plants, promotes photosynthesis, does not discharge to the air to cause greenhouse effect, and is environment-friendly and harmless.

Description

Natural corn cotton cup

Technical Field

The invention relates to the technical field of bra underwear, in particular to a natural corn cotton cup.

Background

Most of clothes and underwear in the market at present are cotton cloth or chemical fiber (such as polyurethane, polyether and the like), the degradation rate is low, and if the cotton cloth or the chemical fiber is treated, the treatment mode of burning and cremating is still adopted at present, so that a large amount of greenhouse gas is discharged into the air, and the environment pollution is caused; meanwhile, the underwear bra belongs to close-fitting clothes worn daily, is long in wearing time, is damaged to health when a human body wears the underwear bra made of polyurethane, polyether and other fiber materials for a long time, is easy to induce mastitis, breast cancer and other breast diseases for a long time, and is not beneficial to human health.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the natural corn cotton cup which is breathable, comfortable, good in support, flexibility and antibacterial property, is prepared by processing natural corn, has high material degradation rate, is buried in soil for degradation, directly enters soil organic matters or is absorbed by plants through carbon dioxide and water generated by degradation, is beneficial to fertilization and nutrient supply of the plants and promotion of photosynthesis, is used as one of materials for plant growth again, has good reproducibility, cannot be discharged into the air to cause a greenhouse effect, and is environment-friendly and harmless.

The purpose of the invention is realized by the following technical scheme: a natural corn cotton cup comprises two symmetrically arranged cups, wherein each cup comprises a first cotton cloth layer, a first corn cotton layer, a second corn cotton layer, a rubber net layer, a third corn cotton layer and a second cotton cloth layer which are sequentially connected from outside to inside; the first corn cotton layer, the second corn cotton layer and the third corn cotton layer are all made of corn fibers by spinning; one side of the cup, which is far away from the heart of the chicken, is provided with a hand-pushing part, and the hand-pushing part is formed by compression molding of a third corn cotton layer.

The corn cotton cup is breathable and comfortable, has better support property, flexibility and antibacterial property, is made by weaving corn fibers prepared by processing natural corns, and has better characteristics of breathability, oxygen permeability, dioxygen-carbon permeability, odor isolation, bacterial inhibition, mildew resistance and the like, so that the cotton cup prepared by the corn fibers has good breathability, does not generate stuffy feeling, has good bacterial inhibition and mildew resistance, and is not easy to breed bacterial viruses; in addition, the pH value of the corn fiber is close to that of human skin, so that the corn fiber is harmless to the skin, has no toxic or side effect on the human body, is safe and environment-friendly, has high biodegradation rate of the material, and finally generates carbon dioxide and water; if the corn fiber is buried in soil for degradation, under the decomposition action of microorganisms, carbon dioxide and water are generated, can directly enter the soil to be organic or absorbed by plants, are not discharged into the air, do not cause greenhouse effect, are beneficial to the fertilization and nutrient supply of the plants, promote photosynthesis, are used as photosynthesis raw materials of vegetation, can be regenerated into starch serving as an initial raw material, and realize the renewability of the corn fiber raw material; and if the polylactic acid material is a product for burning, toxic gases such as nitride, sulfide and the like are not released, so the polylactic acid material is environment-friendly and harmless. In addition, the hand-push part is arranged to gather and gather the fat outside the chest, so that the supporting and gathering function and the massaging function of the cotton cup on the outside of the chest are improved, and the practicability is high.

Preferably, the thickness of the first corn cotton layer is 3.5-4.5mm, the thickness of the second corn cotton layer is 17-19mm, the thickness of the third corn cotton layer is 7.5-8.5mm, the thickness of the first cotton cloth layer and the thickness of the second cotton cloth layer are both 0.8-1.2mm, the thickness of the rubber net layer is 1-2mm, and the mesh density of the rubber net layer is 28-32 pieces/cm²。

The thickness of each layer is strictly controlled, wherein the thickness of the second corn cotton layer reaches 17-19mm, the thicker and heavier corn cotton layer is positioned at the outer side of the cup, and the gravity of the cotton cup can be outward when the cotton cup is worn due to the action of gravity, so that the breast simulation of the cotton cup is improved, the cotton cup has better softness and authenticity, and the wearing comfort of the cotton cup is improved. The cotton cup can be supported and shaped by strictly controlling the thickness and the mesh density of the rubber net layer, and if the thickness of the rubber net layer is thinner or the mesh density is smaller, the supporting performance and the stability of the rubber net layer to the cotton cup are reduced; if the thickness of the rubber net layer is thicker or the mesh density is larger, the softness and the air permeability of the rubber net layer are reduced, and the wearing comfort of the cotton cup is reduced.

Preferably, the thickness of the first layer of corn cotton is 3.5mm, 3.8mm, 4.0mm, 4.3mm or 4.5 mm; the thickness of the second corn cotton layer is 17mm, 17.5mm, 18mm, 18.5mm or 19 m; the thickness of the third corn cotton layer is 7.5mm, 7.8mm, 8.0mm, 8.3mm or 8.5 mm; the thicknesses of the first cotton cloth layer and the second cotton cloth layer are 0.8mm, 0.9mm, 1.0mm, 1.1mm or 1.2 mm; the thickness of the rubber net layer is 1mm, 1.2mm, 1.5mm, 1.8mm or 2 mm; the mesh density of the rubber mesh layer is 28/cm²29 pieces/cm²30 pieces/cm ²31 pieces/cm²Or 32/cm²。

Preferably, the inner surface of one cup close to the chicken heart is provided with an adjusting piece forming a plurality of adjusting holes with the inner surface of the cup, the inner surface of the other cup close to the chicken heart is provided with a connecting strip, and the tail end of the connecting strip is provided with a clasp connected with the adjusting holes in a buckled mode.

According to the invention, through arranging the adjusting piece and the clasp, the clasp can be buckled in the corresponding adjusting hole for adjustment according to the actual breast shape, so that the cup can be suitable for more breast shapes such as an external expanding breast shape or a gathering breast shape, is convenient to adjust, improves the wearing convenience of the cotton cup, and has high practicability. Preferably, the connecting strip is an elastic connecting strip, such as a rubber band, and the adaptability of the cotton cup to various breast shapes can be realized by utilizing the elasticity of the elastic connecting strip.

Preferably, the corn fiber is prepared from polylactic acid master batches, and the polylactic acid master batches comprise the following raw materials in parts by weight:

the corn fiber is prepared by adopting polylactic acid, has no toxic or side effect on human body, can ensure that the prepared corn fiber has no harm to human body, has a pH value close to that of human skin, has no harm to the skin, is safe and environment-friendly, has soft hand feeling, better strength, elasticity, hydrophilicity, yellowing resistance and water diffusivity, can disperse sweat and sterilize, has good biodegradability, and finally generates carbon dioxide and water; the corn fiber prepared by polylactic acid has the characteristics of better air permeability, oxygen permeability, dioxygen-carbon permeability, odor isolation, antibacterial property, mildew resistance and the like, so that the cotton cup prepared by the corn fiber has good air permeability, does not generate stuffy feeling, has good antibacterial and mildew resistance, and is not easy to breed bacteria and viruses.

The inorganic filler adopted by the invention can effectively improve the dispersibility of each material, improve the adhesion between the materials by utilizing the powder property of the inorganic filler, further improve the interaction efficiency of the materials, improve the mechanical strength of polylactic acid, improve the wear resistance, the breaking strength, the tearing strength and the like of the prepared corn fiber, reduce the shrinkage rate of the corn fiber and improve the use stability of the corn fiber; by adopting the antistatic agent, the antistatic effect of the polylactic acid master batch can be improved, so that the prepared corn fiber has excellent antistatic performance, the electrostatic effect generated by the fiber can be avoided, and the spinning interference and influence caused by static electricity in the subsequent fiber spinning preparation process can also be avoided; by adopting the antioxidant, the stability of the prepared corn fiber can be effectively improved, the hydrolysis resistance, the aging resistance, the yellowing resistance and other performances of the corn fiber are improved, the corn fiber is not deformed or the fiber structure is broken and damaged under a high-temperature humid environment, after sweat absorption and multiple times of water washing, and the stability is high; by adopting the surfactant, the dispersibility and the mixing uniformity of the raw materials in the preparation process of the polylactic acid master batch can be effectively improved, so that the prepared polylactic acid master batch has stable performance, and the stable corn fiber is prepared.

By adopting the coupling agent, the interaction of the raw materials can be promoted, the modification of the polylactic acid by the antistatic agent and the antioxidant is promoted, and the antistatic property and the oxidation resistance of the corn fiber are improved; and the dispersion stabilizer is adopted, so that the phenomena of agglomeration and precipitation in the mixing process of the inorganic filler powder and other raw materials can be prevented, the raw materials in the polylactic acid master batch are prevented from being unevenly distributed, and the raw material dispersion uniformity of a polylactic acid master batch system is improved.

Preferably, the inorganic filler comprises 5-6 parts of mica powder, 1-3 parts of aluminum oxide, 1-2 parts of calcium carbonate and 2-3 parts of cordierite powder; the antistatic agent is a mixture of polyoxyethylene alkylamide, alkyl dicarboxymethylammonium glycolide and alkyl bis (alpha-hydroxyethylamine phosphate) in a weight ratio of 2-3:1: 1.8-2.4.

By adopting the inorganic filler, the invention can effectively promote the adhesiveness among materials by utilizing the powder characteristics of the inorganic filler, improve the dispersibility and mixing uniformity among the materials, promote the interaction of the materials, effectively improve the mechanical strength of polylactic acid, improve the performances of wear resistance, breaking strength, tearing strength and the like of the prepared corn fiber, reduce the shrinkage rate of the corn fiber and improve the stability of the corn fiber; the mica powder has active groups on the surface, is easy to combine with molecular chains and twine, can improve the polymerizability of inorganic filler and polylactic acid, and can be polymerized with the polylactic acid to form a compact layer network structure, thereby improving the stability and the comprehensive mechanical property of the polylactic acid; in the adopted cordierite powder, six-membered rings forming the structure of the cordierite powder are arranged along the C axis direction to form a channel along the C axis, a larger space is arranged in the channel, the space can be mixed with a large amount of transition metals (aluminum oxide), the compatibility and the dispersibility of the inorganic filler and the polylactic acid are improved, the polylactic acid and other materials are promoted to be uniformly mixed and dispersed, the adopted aluminum oxide and silicon dioxide can promote alkoxy in the siloxane coupling agent of the invention to react with hydroxyl on the surface of the filler to form a coupled monomolecular film, so that long-chain alkyl and polylactic acid molecular chains are intertwined, thereby effectively improving the properties of the polylactic acid such as strength, tear strength and the like, improving the mechanical strength of the corn fiber, and the melt viscosity of the polylactic acid can be effectively reduced, the processability of the polylactic acid in the subsequent melt spinning process is improved, and the slender and uniform corn fiber is prepared.

The antistatic agent has no effect on skin, is mild and safe, can ensure that the prepared corn fiber does not irritate the skin, has good antistatic effect and good thermal stability, can prevent the polylactic acid master batch from aging of polymers caused by high temperature of melt extrusion in the subsequent process, has higher adhesive force by adopting alkyl dicarboxymethyl ammonium lactone as an amphoteric antistatic agent to be matched with an anionic antistatic agent (polyoxyethylene alkylamide), is easy to absorb and react with polylactic acid, improves the antistatic effect of the corn fiber, can avoid the electrostatic effect generated by the fiber, and can also avoid spinning interference and influence of static electricity on the subsequent fiber spinning preparation process.

Preferably, the antioxidant is a mixture of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester and tris (nonylphenyl) phosphite in a weight ratio of 2-3: 1; the surfactant is a mixture of fatty acid polyoxyethylene ester and alkylphenol polyoxyethylene ether in a weight ratio of 3-4: 1.

By adopting the antioxidant, the antioxidant can improve the oxidation resistance and stability of the corn fiber and the hydrolysis resistance of the corn fiber, and the corn fiber is not deformed or the fiber structure is broken and damaged in a high-temperature and humid environment, after sweat absorption and multiple times of water washing, and has high stability; the adopted beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate has high oxidation resistance, no toxicity and no pollution, has excellent compatibility with polylactic acid, has better functions of preventing deterioration and damage caused by photo-heat, can effectively improve the heat resistance and the water resistance of the polylactic acid, improves the weather resistance of the corn fiber, and has high stability and no breakage and no damage of the fiber structure after high temperature, high humidity and multiple times of washing; the adopted tris (nonylphenyl) phosphite ester has higher thermo-oxidative stability, can inhibit the gelation phenomenon and viscosity increase of a polylactic acid master batch system, so that the polylactic acid master batch has better fluidity in the subsequent melt spinning process and is used for spinning, the spinning effect is long, thin and uniform, the polylactic acid master batch is matched with beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, the antioxidant effect is obviously improved, and the heat resistance and the antioxidant property of the polylactic acid are effectively improved.

By adopting the surfactant, the dispersibility and mixing uniformity of the raw materials in a polylactic acid raw material system can be improved, so that the prepared polylactic acid master batch has stable performance, and stable corn fiber is prepared; the adopted alkylphenol ethoxylates has excellent dispersibility and antistatic property, and can effectively improve the raw material dispersibility of the polylactic acid master batch and the antistatic property of the corn fiber.

Preferably, the coupling agent is at least one of vinyltriethoxysilane, aniline methyl triethoxysilane, pyrophosphate titanate and vinyltris (beta-methoxyethoxy) silane; the dispersion stabilizer is at least one of 2, 5-di-tert-butyl hydroquinone, p-hydroxyanisole, hydroquinone and 2-tert-butyl hydroquinone; the solvent is prepared from ethyl acetate, ethanol and water in a weight ratio of 1-1.5: 2-3:1, in a mixture of the components.

The invention can promote the interaction of all raw materials by adding the coupling agent, promote the antistatic agent and the antioxidant to modify the polylactic acid, and improve the antistatic property and the oxidation resistance of the corn fiber, and by adopting the coupling agent, the inorganic phase of the coupling agent and the polylactic acid master batch are utilized to carry out surface group reaction to form a molecular film to wrap around the powder particles of the inorganic filler, thereby preventing the mutual agglomeration of the powder particles of the inorganic filler, and simultaneously, the organic phase of the coupling agent and the polylactic acid mixture are utilized to carry out reaction, thereby reducing the interfacial tension between the powder particles of the inorganic filler and the polymer, and improving the dispersibility and the compatibility of the polylactic acid master batch.

The dispersion stabilizer has high antioxidant efficiency, high stability and good dispersibility and compatibility, can effectively prevent the agglomeration and precipitation of powder particles of the inorganic filler in the raw material mixing process, avoids the uneven distribution of the raw materials in the polylactic acid master batch, further promotes the even dispersion of the raw materials in the subsequent melt spinning process of the polylactic acid master batch, and if the agglomeration and other phenomena exist, influences the fluidity of the polylactic acid master batch in a molten state, causes the uneven extrusion during spinning, further influences the uneven spinning, and the uniformity and stability of the corn fiber.

According to the invention, the raw materials can be fully and uniformly dissolved by adopting the above types as the solvents, the recovery is easy, and the solvents are harmless to human bodies, while the solvents such as methane chloride, dichloromethane, toluene and the like are adopted for dissolution in the prior art, the conventional solvents are toxic and difficult to recover, and residues are harmful to human bodies; in addition, the solvent adopted is easy to evaporate and remove before the subsequent melt spinning, the processing formability of the spinning is improved, and the melt spinning is easy to carry out.

Preferably, the polylactic acid is prepared by fermenting corn with microorganisms, and the method comprises the following specific steps:

step (1): crushing corn stalks and corn stalks to obtain a corn raw material, adding distilled water and a culture solution, and controlling the mixing ratio of the corn raw material to the distilled water to the culture solution in parts by weight to be 1: 2-3: 0.4-1.2, preparing a corn mixed material;

step (2): taking rhizopus oryzae spores, adding distilled water, and controlling the material-liquid ratio to be 1: 8-10, preparing rhizopus oryzae spore suspension;

and (3): fixing the rhizopus oryzae spore suspension prepared in the step (2) on an immobilized carrier to obtain immobilized rhizopus oryzae seeds; adding immobilized rhizopus oryzae seeds into the corn mixed material prepared in the step (1), adding a fermentation culture material, controlling the mixing ratio of the immobilized rhizopus oryzae seeds to the corn mixed material to be 1:15-20:1.5-2.0 in parts by weight, performing immobilized fermentation, and fermenting at 25-40 ℃ for 3-5 days to prepare a lactate-containing fermented product;

and (4): adding 15-25% of sulfuric acid into the lactate-containing fermented product prepared in the step (3), controlling the mixing ratio of the sulfuric acid to the lactate-containing fermented product to be 1:65-80 by weight, stirring at 55-70 ℃ for 20-30min, and then filtering to obtain a mixed solution containing lactic acid;

and (5): adding chitosan into the mixed solution containing lactic acid prepared in the step (4), adjusting the pH value to 6-7, and controlling the mixing ratio of the chitosan to the mixed solution containing lactic acid to be 2-4: keeping the temperature at 25-35 deg.C for 2-3h at 50-60 deg.C, stirring while flocculating, standing for 2-2.5h after flocculation, centrifuging the supernatant, and removing precipitate to obtain centrifugate;

and (6): and (5) extracting the centrifugate prepared in the step (5), filtering by using activated carbon, and performing ion exchange to obtain the polylactic acid.

According to the invention, the polylactic acid is prepared through the steps, the lactic acid is prepared by adopting a microbial fermentation mode, and the L-lactic acid and the D-lactic acid can be completely absorbed by a human body, so that the polylactic acid is nontoxic and free of side effects on the human body, the prepared polylactic acid raw material is harmless to the human body, and the further prepared polylactic acid master batch and the corn fiber are harmless to the human body, safe and environment-friendly and have good biodegradability; the rhizopus oryzae spores are high in activity, starch contained in the crushed corn can be converted into glucose by using the amylodiastase secreted by the rhizopus oryzae spores, the fermentation efficiency is high, the purity of lactic acid obtained by fermentation is high, and the fermentation yield and the yield of polylactic acid are improved; the generated lactic acid contains L-lactic acid and D-lactic acid, and the two lactic acids exist in a blending mode, so that the high-crystallinity stereopolylactic acid can be prepared, the dissolving temperature and the mechanical strength are better, the prepared corn fiber has higher mechanical strength such as tensile strength, elasticity, elongation at break and the like, and the prepared corn cotton cup is good in durability and water resistance and cannot deform after being worn and washed for many times.

The added sulfuric acid can convert lactate contained in the fermentation product to directly convert the lactate to obtain lactic acid, and the low-concentration sulfuric acid is used as a catalyst to generate polylactic acid through esterification reaction and hydrolysis reaction (wherein the hydrolysis reaction can be carried out by water vapor generated under the medium-high temperature environment), so that the yield of the polylactic acid is high; the filtration after the sulfuric acid is added can remove the calcium sulfate dihydrate which is a crystallized by-product in the lactic acid generation process, so that the purity of the polylactic acid is improved, (the removed calcium sulfate dihydrate can act as ground perfusion gypsum and is used as a raw material in the fields of dry walls, cement and agriculture, so that the resource utilization rate of the by-product generated in the polylactic acid preparation process is improved, and the method is environment-friendly); the chitosan is adopted, and the pH value and the stirring temperature and time in the mixed solution are strictly controlled, so that rhizopus oryzae spores still remaining in the mixed solution can be flocculated, floccules are removed in a centrifugal precipitation mode, and the rhizopus oryzae spore cells are removed; and finally, extracting, filtering by active carbon and performing ion exchange on the centrifugate on the upper layer of the centrifugation, and separating and removing residual sugar, residual culture medium and fermentation byproducts in the lactic acid solution, thereby effectively improving the purity of the polylactic acid.

Preferably, the extraction in the step (6) is to heat the centrifugate to 75-90 ℃, then add 25-30% of sulfuric acid by mass fraction to acidify, and then filter to remove acidified precipitates; then using active carbon to further filter, decolorizing, and removing impurities such as heavy metal ions, calcium ions and amino acids by ion exchange to obtain high-purity polylactic acid, wherein the ion exchange adopts macroporous strong-acid styrene cation exchange resin containing sulfonate, and uses hydrogen ion exchange resin to exchange encountered cations (such as Na in centrifugate)⁺、Ca²⁺、Al³⁺) And anion in the centrifugate is exchanged by adopting macroporous strong-acid styrene anion exchange resin containing quaternary amino groups, and the two kinds of exchange resin are macroporous resin, which can adsorb and remove macromolecular substances of amino acids, thereby improving the concentration of polylactic acid.

Preferably, the corn fiber is prepared by the following steps:

stirring polylactic acid, inorganic filler, coupling agent, dispersion stabilizer and solvent according to the weight parts, adding antistatic agent, antioxidant and surfactant after uniformly stirring, and preparing a mixture after uniformly stirring again; and then evaporating the prepared mixture to remove the solvent, performing melt spinning at the temperature of 155-165 ℃, and cooling and forming after spinning to prepare the corn fiber.

The melting point of the polylactic acid is lower than the thermal decomposition temperature, so that the corn fiber is prepared by adopting a melt spinning mode, and the spun corn fiber is uniform, slender, high in strength, good in elasticity and good in softness; the polylactic acid, the inorganic filler, the coupling agent, the dispersion stabilizer and the solvent are stirred, the inorganic filler is utilized to improve the compatibility between the polylactic acid and other raw materials, the dispersibility, the crosslinking property and the compatibility between the raw materials can be improved, the dispersion stabilizer is utilized to prevent powder particles of the inorganic filler from mutually agglomerating, then the antistatic agent, the antioxidant and the surfactant are added, the antistatic property of the corn fiber is effectively improved, the electrostatic influence on the subsequent spinning process is avoided, the aging of polymers caused by the high temperature of polylactic acid master batches in the subsequent melting process can be avoided through the surfactant, and the strength, the elasticity and the flexibility of the corn fiber are improved.

The melt viscosity of the polylactic acid is high and is sensitive to the temperature, so that the mixed material of the polylactic acid and other raw materials has better fluidity by strictly controlling the melt spinning temperature to be 155-165 ℃, the spinning is easy to carry out, the prepared corn fiber is slender and uniform and has high strength, and if the melt spinning temperature is too high, the polylactic acid raw material is easy to decompose at high temperature, and the quality of the corn fiber is influenced; if the temperature that the fuse-element was spouted is crossed is low excessively, then because polylactic acid's viscosity is great, can make the mobility of compounding lower, be difficult for carrying on the fuse-element and spout the silk, spun fibre silk thread is long and thin even, and intensity is high, and elasticity is good, and the compliance is good. And the fineness of the corn fiber after melt spinning is 5.0-6.0D.

Preferably, the natural corn cotton cup is prepared by the following steps:

step A: sequentially stacking a first corn cotton layer, a second corn cotton layer, a rubber net layer and a third corn cotton layer, carrying out hot die pressing for 115-125s at the pressure of 5-6 atmospheric pressures and the temperature of 160-170 ℃, cooling, and then carrying out cold die pressing for 50-60s at the pressure of 5-6 atmospheric pressures and the temperature of 14-18 ℃ to prepare a composite layer, wherein the thickness of the composite layer is 26-30 mm;

and B: b, coating a first cotton cloth layer on the outer surface of the composite layer prepared in the step A, coating a second cotton cloth layer on the inner surface of the composite layer prepared in the step A, and performing hot pressing to obtain the cup;

and C: and D, cutting and sewing the cup manufactured in the step B to manufacture the natural corn cotton cup.

The corn cotton cup is prepared through the steps, the operation and the control are convenient, the quality is stable, the production efficiency is high, the first corn cotton layer, the second corn cotton layer, the rubber net layer and the third corn cotton layer are subjected to high-temperature hot die pressing, the corn fibers in the corn cotton layers can be preliminarily melted, the corn fibers are easily bonded and connected with other layers, the interlayer stability of the cotton cup is improved, and the interlayer separation phenomenon is not easy to occur; then carrying out low-temperature die pressing, cooling the raw materials of each layer after heating, and simultaneously pressing a film to improve the formability of the composite layer; then the first surface layer and the second cotton cloth layer are compounded on the two sides of the composite layer, so that the protection of the composite layer is improved, and the flexibility and the air permeability of the cotton cup are improved; the temperature, time and pressure in the whole mould pressing preparation process are strictly controlled, the structure and performance of the corn fiber or the polylactic acid are not damaged, and the prepared cotton cup has better air permeability, support property, softness and antibacterial property.

The invention has the beneficial effects that: the corn cotton cup is breathable and comfortable, has better air permeability, support property, flexibility and antibacterial property, is made by weaving corn fibers prepared by processing natural corns, and has the characteristics of better air permeability, oxygen permeability, dioxygen-permeable dicarbon property, odor isolation, antibacterial property, mildew resistance and the like, so that the cotton cup prepared by utilizing the corn fibers has good air permeability, does not generate stuffy feeling, has good antibacterial and mildew resistance, and is not easy to breed bacteria and viruses; in addition, the pH value of the corn fiber is close to that of human skin, so that the corn fiber is harmless to the skin, has no toxic or side effect on the human body, is safe and environment-friendly, has high biodegradation rate of the material, and finally generates carbon dioxide and water; if the corn fiber is buried in soil for degradation, under the decomposition action of microorganisms, carbon dioxide and water are generated, can directly enter the soil to be organic or absorbed by plants, are not discharged into the air, do not cause greenhouse effect, are beneficial to the fertilization and nutrient supply of the plants, promote photosynthesis, are used as photosynthesis raw materials of vegetation, can be regenerated into starch serving as an initial raw material, and realize the renewability of the corn fiber raw material; and if the polylactic acid material is a product which is burnt, toxic gases such as nitride, sulfide and the like can not be released, and the polylactic acid material is environment-friendly and harmless. And through setting up the hand pushing part, take in and gather together the fat in the chest outside, improved the support of cotton cup outside to the chest and gathered together effect and massage effect, the practicality is high.

Drawings

FIG. 1 is a schematic view of the inner surface structure of the cup of the present invention;

FIG. 2 is an enlarged schematic view of part A of the present invention;

fig. 3 is a schematic cross-sectional structure of the cup of the present invention.

The reference signs are: 1-cup, 11-first cotton layer, 12-first cotton layer of maize, 13-second cotton layer of maize, 14-glued membrane layer, 15-third cotton layer of maize, 16-second cotton layer, 17-hand pushing portion, 2-regulation hole, 3-connecting strip, 31-clip.

Detailed Description

For the understanding of those skilled in the art, the present invention will be further described with reference to the following examples and accompanying drawings 1 to 3, and the content of the embodiments is not intended to limit the present invention.

Example 1

Referring to fig. 1-3, a natural corn cotton cup comprises two cups 1 which are symmetrically arranged, wherein each cup 1 comprises a first cotton cloth layer 11, a first corn cotton layer 12, a second corn cotton layer 13, an adhesive net layer 14, a third corn cotton layer 15 and a second cotton cloth layer 16 which are sequentially connected from outside to inside; the first corn cotton layer 12, the second corn cotton layer 13 and the third corn cotton layer 15 are all made of corn fibers by weaving; one side of the cup 1 far away from the heart of the chicken is provided with a hand-push part 17, and the hand-push part 17 is formed by compression molding of a third corn cotton layer 15.

The thickness of the first corn cotton layer 12 is 3.5-4.5mm, the thickness of the second corn cotton layer 13 is 17-19mm, the thickness of the third corn cotton layer 15 is 7.5-8.5mm, the thickness of the first cotton cloth layer 11 and the thickness of the second cotton cloth layer 16 are both 0.8-1.2mm, the thickness of the rubber net layer 14 is 1-2mm, and the mesh density of the rubber net layer 14 is 28-32/cm²。

The internal surface that a cup 1 is close to the heart is equipped with the regulating part that forms a plurality of regulation hole 2 with cup 1 internal surface, and another cup 1 is close to the internal surface of heart and is provided with connecting strip 3, the end of connecting strip 3 be equipped with be used for with the clip 31 that 2 locks of regulation hole are connected.

Example 2

This embodiment differs from embodiment 1 described above in that:

the corn fiber is prepared from polylactic acid master batches, wherein the polylactic acid master batches comprise the following raw materials in parts by weight:

the inorganic filler comprises 5 parts of mica powder, 1 part of aluminum oxide, 1 part of calcium carbonate and 2 parts of cordierite powder; the antistatic agent is a mixture of polyoxyethylene alkylamide, alkyl dicarboxymethylammonium glycolide and alkyl bis (alpha-hydroxyethylamine phosphate) in a weight ratio of 2:1: 1.8.

The antioxidant is a mixture of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester and tris (nonylphenyl) phosphite ester in a weight ratio of 2: 1; the surfactant is a mixture of fatty acid polyoxyethylene ester and alkylphenol polyoxyethylene ether in a weight ratio of 3: 1.

The coupling agent is vinyl triethoxysilane; the dispersion stabilizer is p-hydroxyanisole; the solvent is prepared from ethyl acetate, ethanol and water in a weight ratio of 1.5: 2:1, in a mixture of the components.

The polylactic acid is prepared by fermenting corn with microorganisms, and comprises the following specific steps:

step (1): crushing corn stalks and corn stalks to obtain a corn raw material, adding distilled water and a culture solution, and controlling the mixing ratio of the corn raw material to the distilled water to the culture solution in parts by weight to be 1: 2: 0.4, preparing a corn mixed material;

step (2): taking rhizopus oryzae spores, adding distilled water, and controlling the material-liquid ratio to be 1:8, preparing a rhizopus oryzae spore suspension;

and (3): fixing the rhizopus oryzae spore suspension prepared in the step (2) on an immobilized carrier to obtain immobilized rhizopus oryzae seeds; adding immobilized rhizopus oryzae seeds into the corn mixed material prepared in the step (1), adding a fermentation culture material, controlling the mixing ratio of the immobilized rhizopus oryzae seeds to the corn mixed material to the fermentation culture material to be 1:15:1.5 in parts by weight, performing immobilized fermentation, and fermenting for 5 days at 25 ℃ to prepare a lactate-containing fermented product;

and (4): adding 15% by mass of sulfuric acid into the lactate-containing fermented product obtained in the step (3), controlling the mixing ratio of the sulfuric acid to the lactate-containing fermented product to be 1:65, stirring at 55 ℃ for 30min, and filtering to obtain a mixed solution containing lactic acid;

and (5): adding chitosan into the mixed solution containing lactic acid prepared in the step (4), adjusting the pH value to 6, and controlling the mixing ratio of the chitosan to the mixed solution containing lactic acid in parts by weight to be 2: keeping the temperature at 50 and 25 ℃ for 3h, stirring while flocculating, standing for 2h after flocculation, taking supernatant, centrifuging, and removing precipitate to obtain centrifugate;

The corn fiber is prepared by the following steps:

stirring polylactic acid, inorganic filler, coupling agent, dispersion stabilizer and solvent according to the weight parts, adding antistatic agent, antioxidant and surfactant after uniformly stirring, and preparing a mixture after uniformly stirring again; and then evaporating the prepared mixture to remove the solvent, performing melt spinning at the temperature of 165 ℃, and cooling and forming after spinning to obtain the corn fiber.

The natural corn cotton cup is prepared by the following steps:

step A: sequentially stacking a first corn cotton layer 12, a second corn cotton layer 13, a rubber net layer 14 and a third corn cotton layer 15, carrying out hot die pressing for 125s at the temperature of 160 ℃ under the pressure of 5 atmospheres, cooling, and carrying out cold die pressing for 60s at the temperature of 14 ℃ under the pressure of 5 atmospheres to prepare a composite layer, wherein the thickness of the composite layer is 26 mm;

and B: coating a first cotton cloth layer 11 on the outer surface of the composite layer prepared in the step A, coating a second cotton cloth layer 16 on the inner surface of the composite layer prepared in the step A, and performing hot pressing to obtain the cup;

Example 3

This embodiment differs from embodiment 1 described above in that:

the inorganic filler comprises 5.2 parts of mica powder, 1.5 parts of aluminum oxide, 1.2 parts of calcium carbonate and 2.2 parts of cordierite powder; the antistatic agent is a mixture of polyoxyethylene alkylamide, alkyl dicarboxymethylammonium glycolide and alkyl bis (alpha-hydroxyethylamine phosphate) in a weight ratio of 2.2:1: 2.0.

The antioxidant is a mixture of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester and tris (nonylphenyl) phosphite ester in a weight ratio of 2.2: 1; the surfactant is a mixture of fatty acid polyoxyethylene ester and alkylphenol polyoxyethylene ether in a weight ratio of 3.2: 1.

The coupling agent is pyrophosphate titanate; the dispersion stabilizer is 2, 5-di-tert-butyl hydroquinone; the solvent is a mixture of ethyl acetate, ethanol and water in a weight ratio of 1.5:2.2: 1.

step (1): crushing corn stalks and corn stalks to obtain a corn raw material, adding distilled water and a culture solution, and controlling the mixing ratio of the corn raw material to the distilled water to the culture solution in parts by weight to be 1: 2.2: 0.6, preparing a corn mixed material;

step (2): taking rhizopus oryzae spores, adding distilled water, and controlling the material-liquid ratio to be 1: 8.5, preparing a rhizopus oryzae spore suspension;

and (3): fixing the rhizopus oryzae spore suspension prepared in the step (2) on an immobilized carrier to obtain immobilized rhizopus oryzae seeds; adding immobilized rhizopus oryzae seeds into the corn mixed material prepared in the step (1), adding a fermentation culture material, controlling the mixing ratio of the immobilized rhizopus oryzae seeds to the corn mixed material to the fermentation culture material to be 1:16:1.6 in parts by weight, performing immobilized fermentation, and fermenting at 28 ℃ for 4.5 days to prepare a lactate-containing fermented product;

and (4): adding 18% by weight of sulfuric acid into the lactate-containing fermented product obtained in step (3), controlling the mixing ratio of the sulfuric acid to the lactate-containing fermented product to be 1:68, stirring at 55 ℃ for 28min, and filtering to obtain a mixed solution containing lactic acid;

and (5): adding chitosan into the mixed solution containing lactic acid prepared in the step (4), adjusting the pH value to 6.2, and controlling the mixing ratio of the chitosan to the mixed solution containing lactic acid to be 2.5: preserving heat at 52 and 28 ℃ for 2.8h, stirring while flocculating, standing for 2.1h after flocculation is finished, taking supernate, centrifuging, and removing precipitate to obtain centrifugate;

The corn fiber is prepared by the following steps:

stirring polylactic acid, inorganic filler, coupling agent, dispersion stabilizer and solvent according to the weight parts, adding antistatic agent, antioxidant and surfactant after uniformly stirring, and preparing a mixture after uniformly stirring again; and then evaporating the prepared mixture to remove the solvent, performing melt spinning at the temperature of 163 ℃, and cooling and forming to obtain the corn fiber.

The natural corn cotton cup is prepared by the following steps:

step A: sequentially stacking a first corn cotton layer 12, a second corn cotton layer 13, a rubber net layer 14 and a third corn cotton layer 15, carrying out hot die pressing for 123s at the temperature of 162 ℃ under the pressure of 5.2 atmospheres, cooling, and then carrying out cold die pressing for 58s at the temperature of 15 ℃ under the pressure of 5.2 atmospheres to prepare a composite layer, wherein the thickness of the composite layer is 27 mm;

Example 4

This embodiment differs from embodiment 1 described above in that:

the inorganic filler comprises 5.5 parts of mica powder, 2 parts of aluminum oxide, 1.5 parts of calcium carbonate and 2.5 parts of cordierite powder; the antistatic agent is a mixture of polyoxyethylene alkylamide, alkyl dicarboxymethylammonium glycolide and alkyl bis (alpha-hydroxyethylamine phosphate) in a weight ratio of 2.5: 1: 2.1.

The antioxidant is a mixture of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester and tris (nonylphenyl) phosphite ester in a weight ratio of 2.5: 1; the surfactant is a mixture of fatty acid polyoxyethylene ester and alkylphenol polyoxyethylene ether in a weight ratio of 3.5: 1.

The coupling agent is aniline methyl triethoxysilane; the dispersion stabilizer is 2, 5-di-tert-butyl hydroquinone; the solvent is a mixture of ethyl acetate, ethanol and water in a weight ratio of 1.3:2.5: 1.

step (1): crushing corn stalks and corn stalks to obtain a corn raw material, adding distilled water and a culture solution, and controlling the mixing ratio of the corn raw material to the distilled water to the culture solution in parts by weight to be 1: 2.5: 0.8, preparing a corn mixed material;

step (2): taking rhizopus oryzae spores, adding distilled water, and controlling the material-liquid ratio to be 1: 9, preparing a rhizopus oryzae spore suspension;

and (3): fixing the rhizopus oryzae spore suspension prepared in the step (2) on an immobilized carrier to obtain immobilized rhizopus oryzae seeds; adding immobilized rhizopus oryzae seeds into the corn mixed material prepared in the step (1), adding a fermentation culture material, controlling the mixing ratio of the immobilized rhizopus oryzae seeds to the corn mixed material to be 1:18:1.8 in parts by weight, performing immobilized fermentation, and fermenting at 33 ℃ for 4 days to prepare a lactate-containing fermented product;

and (4): adding 20% by weight of sulfuric acid into the lactate-containing fermented product obtained in the step (3), controlling the mixing ratio of the sulfuric acid to the lactate-containing fermented product to be 1:72, stirring at 63 ℃ for 25min, and filtering to obtain a mixed solution containing lactic acid;

and (5): adding chitosan into the mixed solution containing lactic acid prepared in the step (4), adjusting the pH value to 6.5, and controlling the mixing ratio of the chitosan to the mixed solution containing lactic acid in parts by weight to be 3: preserving heat at the temperature of 55 ℃ and 30 ℃ for 2.5h, stirring while flocculating, standing for 2.2h after flocculation is finished, taking supernate, centrifuging, and removing precipitate to obtain centrifugate;

The corn fiber is prepared by the following steps:

stirring polylactic acid, inorganic filler, coupling agent, dispersion stabilizer and solvent according to the weight parts, adding antistatic agent, antioxidant and surfactant after uniformly stirring, and preparing a mixture after uniformly stirring again; and then evaporating the prepared mixture to remove the solvent, performing melt spinning at the temperature of 160 ℃, and cooling and forming after spinning to obtain the corn fiber.

The natural corn cotton cup is prepared by the following steps:

step A: sequentially stacking a first corn cotton layer 12, a second corn cotton layer 13, a rubber net layer 14 and a third corn cotton layer 15, carrying out hot die pressing for 120s at the temperature of 165 ℃ under the pressure of 5.5 atmospheres, cooling, and then carrying out cold die pressing for 55s at the temperature of 16 ℃ under the pressure of 5.5 atmospheres to prepare a composite layer, wherein the thickness of the composite layer is 28 mm;

Example 5

This embodiment differs from embodiment 1 described above in that:

the inorganic filler comprises 5.8 parts of mica powder, 2.5 parts of aluminum oxide, 1.8 parts of calcium carbonate and 2.8 parts of cordierite powder; the antistatic agent is a mixture of polyoxyethylene alkylamide, alkyl dicarboxymethylammonium glycolide and alkyl bis (alpha-hydroxyethylamine phosphate) in a weight ratio of 2.8:1: 2.2.

The antioxidant is a mixture of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester and tris (nonylphenyl) phosphite ester in a weight ratio of 2.8: 1; the surfactant is a mixture of fatty acid polyoxyethylene ester and alkylphenol polyoxyethylene ether in a weight ratio of 3.8: 1.

The coupling agent is vinyl tri (beta-methoxyethoxy) silane; the dispersion stabilizer is 2-tert-butyl hydroquinone; the solvent is a mixture of ethyl acetate, ethanol and water in a weight ratio of 1.2:2.8: 1.

step (1): crushing corn stalks and corn stalks to obtain a corn raw material, adding distilled water and a culture solution, and controlling the mixing ratio of the corn raw material to the distilled water to the culture solution in parts by weight to be 1: 2.8:1, preparing a corn mixed material;

step (2): taking rhizopus oryzae spores, adding distilled water, and controlling the material-liquid ratio to be 1: 9.5, preparing rhizopus oryzae spore suspension;

and (3): fixing the rhizopus oryzae spore suspension prepared in the step (2) on an immobilized carrier to obtain immobilized rhizopus oryzae seeds; adding immobilized rhizopus oryzae seeds into the corn mixed material prepared in the step (1), adding a fermentation culture material, controlling the mixing ratio of the immobilized rhizopus oryzae seeds to the corn mixed material to the fermentation culture material to be 1:19:1.9 in parts by weight, performing immobilized fermentation, and fermenting at 37 ℃ for 3.5 days to prepare a lactate-containing fermented product;

and (4): adding 23% by weight of sulfuric acid into the lactate-containing fermented product obtained in the step (3), controlling the mixing ratio of the sulfuric acid to the lactate-containing fermented product to be 1:76, stirring at 66 ℃ for 22min, and filtering to obtain a mixed solution containing lactic acid;

and (5): adding chitosan into the mixed solution containing lactic acid prepared in the step (4), adjusting the pH value to 6.8, and controlling the mixing ratio of the chitosan to the mixed solution containing lactic acid to be 3.5: preserving heat at the temperature of 58 ℃ and 32 ℃ for 2.2h, stirring while flocculating, standing for 2.4h after flocculation is finished, taking supernate, centrifuging, and removing precipitate to obtain centrifugate;

The corn fiber is prepared by the following steps:

stirring polylactic acid, inorganic filler, coupling agent, dispersion stabilizer and solvent according to the weight parts, adding antistatic agent, antioxidant and surfactant after uniformly stirring, and preparing a mixture after uniformly stirring again; and then evaporating the prepared mixture to remove the solvent, performing melt spinning at the temperature of 158 ℃, and cooling and forming after spinning to obtain the corn fiber.

The natural corn cotton cup is prepared by the following steps:

step A: sequentially stacking a first corn cotton layer 12, a second corn cotton layer 13, a rubber net layer 14 and a third corn cotton layer 15, carrying out hot die pressing for 118s at the pressure of 5.8 atmospheres and the temperature of 168 ℃, cooling, and then carrying out cold die pressing for 52s at the pressure of 5.8 atmospheres and the temperature of 147 ℃ to prepare a composite layer, wherein the thickness of the composite layer is 29 mm;

Example 6

This embodiment differs from embodiment 1 described above in that:

the inorganic filler comprises 6 parts of mica powder, 3 parts of aluminum oxide, 2 parts of calcium carbonate and 3 parts of cordierite powder; the antistatic agent is a mixture of polyoxyethylene alkylamide, alkyl dicarboxymethylammonium glycolide and alkyl bis (alpha-hydroxyethylamine phosphate) in a weight ratio of 3:1: 2.4.

The antioxidant is a mixture of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester and tris (nonylphenyl) phosphite ester in a weight ratio of 3: 1; the surfactant is a mixture of fatty acid polyoxyethylene ester and alkylphenol polyoxyethylene ether in a weight ratio of 4: 1.

The coupling agent is pyrophosphate titanate; the dispersion stabilizer is hydroquinone; the solvent is a mixture of ethyl acetate, ethanol and water in a weight ratio of 1:3: 1.

step (1): crushing corn stalks and corn stalks to obtain a corn raw material, adding distilled water and a culture solution, and controlling the mixing ratio of the corn raw material to the distilled water to the culture solution in parts by weight to be 1:3: 1.2, preparing a corn mixed material;

and (3): fixing the rhizopus oryzae spore suspension prepared in the step (2) on an immobilized carrier to obtain immobilized rhizopus oryzae seeds; adding immobilized rhizopus oryzae seeds into the corn mixed material prepared in the step (1), adding a fermentation culture material, controlling the mixing ratio of the immobilized rhizopus oryzae seeds to the corn mixed material to be 1:20:2.0 in parts by weight, performing immobilized fermentation, and fermenting at 40 ℃ for 3 days to prepare a lactate-containing fermented product;

and (4): adding 25% by weight of sulfuric acid into the lactate-containing fermented product obtained in the step (3), controlling the mixing ratio of the sulfuric acid to the lactate-containing fermented product to be 1:80, stirring at 70 ℃ for 20min, and filtering to obtain a mixed solution containing lactic acid;

and (5): adding chitosan into the mixed solution containing lactic acid prepared in the step (4), adjusting the pH value to 7, and controlling the mixing ratio of the chitosan to the mixed solution containing lactic acid in parts by weight to be 4: keeping the temperature at 60 and 35 ℃ for 2h, stirring while flocculating, standing for 2.5h after flocculation, taking supernatant, centrifuging, and removing precipitate to obtain centrifugate;

The corn fiber is prepared by the following steps:

stirring polylactic acid, inorganic filler, coupling agent, dispersion stabilizer and solvent according to the weight parts, adding antistatic agent, antioxidant and surfactant after uniformly stirring, and preparing a mixture after uniformly stirring again; and then evaporating the prepared mixture to remove the solvent, performing melt spinning at the temperature of 155 ℃, and cooling and forming after spinning to obtain the corn fiber.

The natural corn cotton cup is prepared by the following steps:

step A: sequentially stacking a first corn cotton layer 12, a second corn cotton layer 13, a rubber net layer 14 and a third corn cotton layer 15, carrying out hot die pressing for 115s at the temperature of 170 ℃ under the pressure of 6 atmospheres, cooling, and carrying out cold die pressing for 50s at the temperature of 18 ℃ under the pressure of 6 atmospheres to prepare a composite layer, wherein the thickness of the composite layer is 30 mm;

Comparative example 1

This comparative example differs from example 1 above in that:

a natural corn cotton cup comprises two symmetrically arranged cups, wherein each cup comprises a first cotton cloth layer, a first corn cotton layer, a second corn cotton layer, a third corn cotton layer and a second cotton cloth layer which are sequentially connected from outside to inside; the first corn cotton layer, the second corn cotton layer and the third corn cotton layer are all made of corn fibers by spinning; one side of the cup, which is far away from the heart of the chicken, is provided with a hand-pushing part, and the hand-pushing part is formed by compression molding of a third corn cotton layer.

The thickness of the first corn cotton layer is 3.5-4.5mm, the thickness of the second corn cotton layer is 17-19mm, the thickness of the third corn cotton layer is 7.5-8.5mm, and the thicknesses of the first cotton cloth layer and the second cotton cloth layer are both 0.8-1.2 mm.

The internal surface that a cup is close to the heart is equipped with the regulating part that forms a plurality of regulation hole with the cup internal surface, and another cup is close to the internal surface of heart and is provided with the connecting strip, the end of connecting strip be equipped with be used for with the clip that the regulation hole lock is connected.

Comparative example 2

This comparative example differs from example 4 above in that:

the natural corn cotton cup is prepared by the following steps:

step (1): sequentially stacking a first corn cotton layer, a second corn cotton layer, a rubber net layer and a third corn cotton layer, carrying out hot die pressing for 120s at the pressure of 5.5 atmospheres and the temperature of 165 ℃, and cooling to obtain a composite layer, wherein the thickness of the composite layer is 28 mm;

step (2): coating a first cotton cloth layer on the outer surface of the composite layer prepared in the step (1), coating a second cotton cloth layer on the inner surface of the composite layer prepared in the step (1), and performing hot pressing to obtain the cup;

and (3): and (3) cutting and sewing the cup prepared in the step (2) to obtain the natural corn cotton cup.

Comparative example 3

This comparative example differs from example 4 above in that:

the corn fiber is made from a commercially available polylactic acid masterbatch, such as the 4032D type polylactic acid sold by NatureWorks, USA.

Comparative example 4

This comparative example differs from example 4 above in that:

the corn fiber is prepared by the following steps:

stirring polylactic acid, inorganic filler, coupling agent, dispersion stabilizer and solvent according to the weight parts, adding antistatic agent, antioxidant and surfactant after uniformly stirring, and preparing a mixture after uniformly stirring again; and then evaporating the prepared mixture to remove the solvent, performing melt spinning at the temperature of 180 ℃, and cooling and forming after spinning to obtain the corn fiber.

The corn cotton cups obtained in examples 2 to 6 and comparative examples 1 to 2 were tested for air permeability, softness, support, washing resistance, etc., and the test methods and results are as follows:

(1) air permeability test

The test method comprises the following steps: the inner side of the cotton cup is downward, steam is continuously sprayed to the inner side of the cotton cup (the temperature of the steam at the inner side of the cotton cup is 115 ℃), the speed of water vapor or water drops permeating from the outer side of the cotton cup is observed, and the temperature of the steam at the outer side of the cotton cup is measured.

(2) Softness test

The test method comprises the following steps: the cotton cups obtained in examples 2 to 6 and comparative examples 1 to 2 were subjected to softness test using an M508 swing type fabric softness tester, and the cotton cups were clamped to a sample holder having a sample bar capable of swinging sufficiently in the tester, and the sample was bent by increasing the weight of a pendulum preventing the sample bar from swinging until the sample left the pendulum, and the force applied when the sample left the pendulum was measured.

(3) Support test

The test method comprises the following steps: the cotton cups obtained in examples 2 to 6 and comparative examples 1 to 2 were subjected to a support test using an LLY-01 type electronic stiffness meter, and the flexural modulus at the time of flexural deformation was measured using the longitudinal connecting line of the cotton cup as a cantilever beam.

(4) Wash resistance test

The test method comprises the following steps: soaking the cotton cup in warm water at 35-40 deg.C for 20-30min, adding laundry detergent with pH of 7.5-8.5, machine-washing for 10-15min, and naturally air drying to obtain a machine-washing process; and (4) repeatedly carrying out the machine washing process for 20-60 times on the cotton cup, and then inspecting the deformation condition of the cotton cup after being washed by water for multiple times.

(5) Test results

From the data, the cotton cups prepared in the examples 2 to 6 and the comparative example 1 can clearly see that the water vapor rapidly escapes from the outer side of the cotton cup, and the temperature difference is less than 6 ℃, which shows that the cotton cups prepared in the examples 2 to 6 and the comparative example 1 have good air permeability, do not generate stuffy feeling when worn under the body temperature of a human body, and are breathable and comfortable; the steam temperature difference between the two sides of the cotton cup prepared in the comparative example 2 is close to 20 ℃, which shows that the air permeability of the cotton cup prepared in the comparative example 2 is relatively weak, and further shows that the cotton cup prepared in the invention adopts the process of hot die pressing and then cold die pressing, so that the prepared cotton cup has high stability, the internal air-permeable micropore structure is stable, and the air permeability and the wearing comfort of the cotton cup are improved.

In the aspects of softness and support, the cotton cups prepared in the embodiments 2 to 6 have soft handfeel, better support for the chest when worn, and better supporting and gathering effects; the cotton cup prepared in the comparative example 1 is softer than those prepared in the examples 2-6, has relatively higher softness, but has lower support property and is easy to deform, and the supporting and gathering effects on the chest are not ideal when the cotton cup is worn, so that the rubber net layer adopted by the invention has little influence on the softness of the cotton cup, is soft and comfortable, can effectively improve the support property of the cotton cup, and is not easy to deform or collapse; compared with the corn cotton cup prepared by hot pressing in the comparative example 2, the softness and the flexural modulus of elasticity of the corn cotton cup prepared by hot pressing are obviously reduced compared with those of the examples 2-6, which shows that the cotton cup provided by the invention can improve the stability and the support property of the cotton cup by adopting the process of hot die pressing and then cold die pressing, and simultaneously improves the softness, the wearing comfort and the supporting and bearing effect of the cotton cup.

In the aspect of water washing resistance, the cotton cups prepared in examples 2 to 6 still do not deform under the condition of 50 times of machine washing, while the cotton cups in comparative examples 1 to 2 deform and break after 12 times of water washing and 15 times of water washing, which shows that the water resistance of the cotton cups in comparative examples 1 to 2 is poor, further shows that the cotton cups can improve the support property of the cotton cups on the one hand and remarkably improve the water washing resistance of the cotton cups on the other hand, and are not easy to deform and break after multiple water washing.

The corn fibers obtained in the above examples 2 to 6 and comparative examples 3 to 4 were subjected to tests of properties such as fiber strength, elongation at break, strength at break, abrasion resistance, boiling water shrinkage, and the test methods and results are as follows:

(1) abrasion resistance test

The fibers were held in a fixture on a fixed support and mounted on a disk of the material to be tested. The other end of the fiber was suspended by a weight of 8g, the disc was rotated at a speed of 75m/min, and the portion of the fiber yarn in contact with the disc was abraded and the surface was continuously abraded until the fiber was abraded and broken, and the time from the abrasion start to the breakage of the fiber was recorded.

(2) Shrinkage in boiling water

And (3) placing the fiber in boiling water to boil for 30min, testing the length of the fiber before and after boiling water treatment, and calculating to obtain the boiling water shrinkage.

(3) Test results

From the data, the corn fibers prepared in the examples 2 to 6 have better fiber strength, elongation at break, breaking strength, wear resistance and other properties, and the shrinkage rate in boiling water is low, and the fiber shrinkage phenomenon after boiling water treatment is not obvious, which shows that the corn fibers prepared by the invention have high strength, good stability and are not easy to break and shrink.

Compared with the embodiment 4, the corn fiber of the comparative example 1 adopts the common commercially available polylactic acid raw material, the prepared corn fiber has obviously lower strength, the elongation at break, the breaking strength and the wear resistance are also obviously reduced, the boiling water shrinkage rate is higher, and the fiber is easy to break and damage after the boiling water treatment.

Compared with the embodiment 5, the melt spinning temperature in the melt spinning process of the comparative example 2 is 180 ℃, the fiber strength, elongation at break, strength at break and wear resistance of the prepared corn fiber are remarkably low, and the boiling water shrinkage is high, which shows that the melt spinning temperature of the comparative example 2 is too high, so that the polylactic acid raw material is decomposed at high temperature, the mechanical strength and performance of the corn fiber are reduced, the mechanical performance of the prepared corn fiber is low, and the fiber is easy to break and damage after the boiling water treatment.

The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.

Claims

1. The utility model provides a cotton cup of natural maize, includes two cups that the symmetry set up, its characterized in that: the bra cup comprises a first cotton cloth layer, a first corn cotton layer, a second corn cotton layer, a rubber net layer, a third corn cotton layer and a second cotton cloth layer which are sequentially connected from outside to inside; the first corn cotton layer, the second corn cotton layer and the third corn cotton layer are all made of corn fibers by spinning; a hand-pushing part is arranged on one side of the cup away from the heart, and the hand-pushing part is formed by compression molding of a third corn cotton layer;

35-50 parts of polylactic acid

15-20 parts of inorganic filler

0.5-1.5 parts of antistatic agent

1-2 parts of antioxidant

2-4 parts of surfactant

1.5-2 parts of coupling agent

0.2 to 0.4 portion of dispersion stabilizer

30-40 parts of a solvent;

the inorganic filler comprises 5-6 parts of mica powder, 1-3 parts of aluminum oxide, 1-2 parts of calcium carbonate and 2-3 parts of cordierite powder;

the antistatic agent is a mixture of polyoxyethylene alkylamide, alkyl dicarboxymethylammonium glycolide and alkyl bis (alpha-hydroxyethylamine phosphate) in a weight ratio of 2-3:1: 1.8-2.4;

the antioxidant is a mixture of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester and tris (nonylphenyl) phosphite ester in a weight ratio of 2-3: 1;

the surfactant is a mixture of fatty acid polyoxyethylene ester and alkylphenol polyoxyethylene ether in a weight ratio of 3-4: 1;

the corn fiber is prepared by the following steps:

2. The natural corn wool cup as claimed in claim 1, wherein: the thickness of the first corn cotton layer is 3.5-4.5mm, the thickness of the second corn cotton layer is 17-19mm, the thickness of the third corn cotton layer is 7.5-8.5mm, the thickness of the first cotton cloth layer and the thickness of the second cotton cloth layer are both 0.8-1.2mm, the thickness of the rubber net layer is 1-2mm, and the mesh density of the rubber net layer is 28-32 pieces/cm²。

3. The natural corn wool cup as claimed in claim 1, wherein: the internal surface that a cup is close to the heart is equipped with the regulating part that forms a plurality of regulation hole with the cup internal surface, and another cup is close to the internal surface of heart and is provided with the connecting strip, the end of connecting strip be equipped with be used for with the clip that the regulation hole lock is connected.

4. The natural corn wool cup as claimed in claim 1, wherein: the coupling agent is at least one of vinyltriethoxysilane, aniline methyl triethoxysilane, pyrophosphate titanate and vinyltris (beta-methoxyethoxy) silane; the dispersion stabilizer is at least one of 2, 5-di-tert-butyl hydroquinone, p-hydroxyanisole, hydroquinone and 2-tert-butyl hydroquinone; the solvent is prepared from ethyl acetate, ethanol and water in a weight ratio of 1-1.5: 2-3:1, in a mixture of the components.

5. The natural corn wool cup as claimed in claim 1, wherein: the polylactic acid is prepared by fermenting corn with microorganisms, and comprises the following specific steps:

6. The natural corn wool cup as claimed in claim 1, wherein: the method is characterized in that: the natural corn cotton cup is prepared by the following steps: