Preparation method of antibacterial polyester-cotton blended fabric and product

Abstract

The invention discloses an antibacterial polyester-cotton blended fabric preparation method and a product, and relates to the technical field of antibacterial fabrics, and the antibacterial polyester-cotton blended fabric preparation method comprises the following steps: mixing 18-23 wt% of talcum powder, 25-35 wt% of titanium dioxide and 45-55 wt% of silicate minerals in proportion, adding a copper ion solution with the mass being two times of the total mass of the mixture and the concentration being 0.8-1.2 mol / L, and stirring and mixing; drying under the condition of 100-120 DEG C to obtain a dried precursor; placing the dried precursor in an air atmosphere, and roasting at 500-700 DEG C for 2-4 hours to form a compound containing copper oxide; crushing the roasted product, screening and collecting particles with the particle size section of 50-100nm to obtain antibacterial powder; uniformly mixing the antibacterial powder and polyester powder according to a mass ratio of 1: (8-10); preparing the mixed powder into antibacterial master batches through granulation equipment; the antibacterial master batch is spun into antibacterial polyester silk through a spinning machine, the antibacterial polyester silk and cotton silk are blended, and the antibacterial polyester-cotton blended fabric is prepared. According to the antibacterial polyester-cotton blended fabric preparation method and the product, the utilization rate of effective components of the antibacterial agent is high, and long-acting antibacterial effect can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of antibacterial fabrics, and particularly to a preparation method and product of an antibacterial polyester-cotton blended fabric. Background Art

[0002] The multi-porous fabric structure is prone to retaining human metabolites (such as sebum, sweat, etc.), providing favorable conditions for the growth of microorganisms. If such biological contamination is not effectively inhibited, it may cause health risks such as skin inflammation. The current antibacterial modification of textiles mainly uses two methods, namely the preparation of antibacterial fibers and the post-treatment of fabrics, to perform antibacterial treatment on fabrics. The fabric post-treatment method is to process and finish the non-antibacterial fabric in the later stage. Generally, the finishing agent and the antibacterial agent are mixed and covered on the fabric surface. This method has low cost and simple operation. However, since the antibacterial agent only adheres to the fiber surface, it is easy to fall off after friction or washing, and the persistence is poor.

[0003] The traditional preparation process of antibacterial fibers is to directly blend various antibacterial agents such as inorganic / organic / natural into the spinning solution, and form antibacterial fibers through melt spinning or solution spinning processes. However, in this blending spinning method, the antibacterial agent is prone to agglomeration in the fiber matrix, resulting in an "explosive" characteristic of the initial release. This not only causes the utilization rate of the active ingredient to be less than 40%, but also the sudden increase in the concentration of free antibacterial agent may cause irritation reactions at the contact site.

[0004] Therefore, it is necessary to propose a preparation method and product of an antibacterial polyester-cotton blended fabric to solve the above problems. Summary of the Invention

[0005] (I) Technical Problems to be Solved The purpose of the present invention is to provide a preparation method and product of an antibacterial polyester-cotton blended fabric to solve the problems raised in the above background art.

[0006] (II) Technical Solutions To achieve the above objectives, the present invention is realized through the following technical solutions: A preparation method of an antibacterial polyester-cotton blended fabric includes the following steps: S1. Mix 18-23 wt% of talcum powder, 25-35 wt% of titanium dioxide, and 45-55 wt% of silicate mineral in proportion, add a copper ion solution twice the mass of their total mixture, and the concentration of the copper ion solution is 0.8-1.2 mol / L, and stir and mix; S2. Dry at 100-120 °C to obtain a dry precursor; S3. Place the dry precursor in an air atmosphere and calcine at 500-700 °C for 2-4 hours to form a copper oxide-containing composite; S4. Crush the calcined product, screen and collect particles in the particle size range of 50-100 nm to obtain an antibacterial powder; S5. Mix the antibacterial powder and polyester powder evenly at a mass ratio of 1:8 - 10. S6. Make the mixed powder into antibacterial masterbatch through granulation equipment. S7. Spin the antibacterial masterbatch into antibacterial polyester filaments through a spinning machine, and blend the antibacterial polyester filaments with cotton filaments to obtain antibacterial polyester-cotton blended fabric.

[0007] Preferably, the ratio of antibacterial polyester filaments to cotton filaments in the antibacterial polyester-cotton blended fabric is 60 - 70wt%:30 - 40wt%.

[0008] Preferably, the silicate mineral is selected from one or more of palygorskite, montmorillonite, and illite.

[0009] Preferably, the copper ion solution is prepared from one or more of copper sulfate, copper nitrate, and copper chloride.

[0010] Preferably, the antibacterial polyester filament has a skin-core composite structure and is composed of a polyester skin layer and an antibacterial core layer; the thickness of the polyester skin layer is 15 - 30% of the diameter of the antibacterial polyester filament, and the polyester skin layer has a microporous structure with a porosity of 15 - 25%.

[0011] Preferably, the antibacterial polyester filament is prepared by the following steps: a. Mix the polyester powder and sodium chloride powder evenly at a mass ratio of 7:2 - 3 to prepare a polyester skin layer masterbatch. b. After melting the polyester skin layer masterbatch and the core layer masterbatch respectively, spin them through a skin-core composite spinning machine to obtain skin-core composite structure fibers. c. Wash the skin-core composite structure fibers to dissolve the sodium chloride particles in the skin layer, form a through microporous structure, and then dry them to obtain antibacterial polyester filaments.

[0012] Provide an antibacterial polyester-cotton blended fabric prepared by the above preparation method.

[0013] (III) Beneficial effects Compared with the prior art, the present invention provides a preparation method and product of an antibacterial polyester-cotton blended fabric, having the following beneficial effects: 1. For the preparation method and product of the antibacterial polyester-cotton blended fabric, the layered structure of talc is used to optimize the spinning lubrication performance, reduce the friction coefficient, reduce the spinning breakage rate, and at the same time improve the rheology of printing and dyeing slurries, enhancing the color yield and color light purity; the nano-particle characteristics of titanium dioxide are utilized to enhance the fiber strength, form physical cross-linking points, improve the breaking strength, and endow the fabric with anti-ultraviolet performance; with the high specific surface area characteristics of silicate minerals, the antibacterial agent loading amount is increased, and at the same time, the agglomeration of antibacterial agents can be avoided, synergistically improving the antibacterial property and durability of the fabric.

[0014] 2. The preparation method and product of the antibacterial polyester-cotton blended fabric adopt a core-sheath composite structure. Through the protection of the cortex and the microporous design, the slow release rate of the antibacterial components in the core layer is controlled, avoiding the waste of active ingredients and the risk of skin irritation caused by excessive initial release, and ensuring long-term antibacterial performance. Detailed implementation mode

[0015] Next, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0016] Example 1 Weigh 20wt% of talcum powder, 30wt% of titanium dioxide, 30wt% of palygorskite, and 20wt% of montmorillonite and stir them evenly; add a 1.0mol / L copper sulfate solution twice the mass of the total mixture, maintain the solution temperature at 50°C and stir mechanically for 2h to complete the interlayer replacement and surface adsorption of copper ions; transfer the slurry to a vacuum drying oven and dry it at a temperature of 100 - 120°C and -0.09MPa for 2 hours to obtain a precursor with a water content of ≤0.5%; place the dried precursor in an air atmosphere and calcine it at 600°C for 3 hours to obtain a copper oxide composite; crush the calcined product and screen and collect particles in the particle size range of 50 - 100nm to obtain antibacterial powder; put the antibacterial powder and polyester powder into a mixer at a mass ratio of 1:9, and melt and blend them at 265°C and 80rpm for 15 minutes; make the mixed powder into antibacterial masterbatch through a granulating device; spin the antibacterial masterbatch into antibacterial polyester filaments through a spinning machine, and blend 65wt% of the antibacterial polyester filaments with 35wt% of cotton filaments to obtain the antibacterial polyester-cotton blended fabric.

[0017] Example 2 Weigh 18wt% of talcum powder, 27wt% of titanium dioxide, 30wt% of palygorskite, and 25wt% of montmorillonite and stir them evenly; add a 1.2mol / L copper nitrate solution twice the mass of the total mixture, maintain the solution temperature at 50°C and stir mechanically for 2h to complete the interlayer replacement and surface adsorption of copper ions; transfer the slurry to a vacuum drying oven and dry it at a temperature of 100 - 120°C and -0.09MPa for 2 hours to obtain a precursor with a water content of ≤0.5%; place the dried precursor in an air atmosphere and calcine it at 700°C for 2 hours to obtain a copper oxide composite; crush the calcined product and screen and collect particles in the particle size range of 50 - 100nm to obtain antibacterial powder; put the antibacterial powder and polyester powder into a mixer at a mass ratio of 1:10, and melt and blend them at 265°C and 80rpm for 15 minutes; make the mixed powder into antibacterial masterbatch through a granulating device; spin the antibacterial masterbatch into antibacterial polyester filaments through a spinning machine, and blend 60wt% of the antibacterial polyester filaments with 40wt% of cotton filaments to obtain the antibacterial polyester-cotton blended fabric.

[0018] Example 3 Weigh 23 wt% of talcum powder, 32 wt% of titanium dioxide, 30 wt% of palygorskite, and 15 wt% of illite, and stir and mix them; add 0.8 mol / L copper chloride solution twice the mass of their total mixture, maintain the solution temperature at 50 °C, and mechanically stir for 2 h to complete the interlayer replacement and surface adsorption of copper ions; transfer the slurry to a vacuum drying oven, and dry it for 2 hours under the conditions of maintaining the temperature at 100 - 120 °C and -0.09 MPa to obtain a precursor with a moisture content of ≤0.5%; place the dried precursor in an air atmosphere and calcine it at 500 °C for 4 hours to obtain a copper oxide composite; crush the calcined product, screen and collect particles in the particle size range of 50 - 100 nm to obtain antibacterial powder; put the antibacterial powder and polyester powder into a mixer in a mass ratio of 1:8, and melt and blend them at 265 °C and 80 rpm for 15 minutes; make the mixed powder into antibacterial masterbatch through granulation equipment; spin the antibacterial masterbatch into antibacterial polyester filaments through a spinning machine, and blend 70 wt% of the antibacterial polyester filaments with 30 wt% of cotton filaments to obtain antibacterial polyester-cotton blended fabric.

[0019] Talcum powder realizes lubrication and friction reduction between fibers through its layered structure, significantly reducing the spinning friction coefficient and the breakage rate, and at the same time optimizing the rheological properties of printing and dyeing slurries to improve the color yield and color light purity. Titanium dioxide realizes the extinction and whitening effects by regulating the refractive index and covering power, forms physical cross-linking points in the fibers to increase the breaking strength by 15%, its nano-particle infrared reflection characteristic reduces the thermal shrinkage rate by 20%, and endows the fabric with UPF50+ anti-ultraviolet performance and photocatalytic antibacterial function. Silicate minerals such as palygorskite and montmorillonite, relying on their high specific surface area characteristics, act as copper ion carriers to increase the antibacterial agent loading amount.

[0020] Example 4 The difference from Example 1 is that the antibacterial polyester filament has a skin-core composite structure, which consists of a polyester skin layer and an antibacterial core layer. The antibacterial polyester filament with a skin-core composite structure is prepared by the following steps: Mix 70 wt% of polyester powder and 30 wt% of sodium chloride evenly and melt-extrude to obtain a polyester skin layer masterbatch; spin the skin layer masterbatch and the core layer antibacterial masterbatch through a skin-core type composite spinning machine; immerse the nascent fiber in water to remove sodium chloride, and then dry it with hot air to obtain an antibacterial polyester filament with a porosity of 25%. Among them, the sodium chloride content in the skin layer masterbatch is proportional to the porosity, the skin layer thickness is proportional to the slow-release period of the core layer antibacterial component, and the porosity is inversely proportional to the slow-release period of the core layer antibacterial component.

[0021] The skin layer, as a protective layer, can control the release rate of the core layer antibacterial component, avoiding the waste of active ingredients and the risk of skin irritation caused by the initial explosive release; the core layer is concentrated with a high content of antibacterial agent to ensure long-term antibacterial performance.

[0022] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A preparation method of an antibacterial polyester-cotton blended fabric, characterized in that , including the following steps: S1. Mix 18 - 23 wt% of talcum powder, 25 - 35 wt% of titanium dioxide, and 45 - 55 wt% of silicate mineral in proportion, add a copper ion solution twice the mass of their total mixture, with the concentration of the copper ion solution being 0.8 - 1.2 mol / L, and stir to mix; S2. Dry at 100 - 120 °C to obtain a dry precursor; S3. Place the dry precursor in an air atmosphere and calcine at 500 - 700 °C for 2 - 4 hours to form a copper oxide-containing composite; S4. Crush the calcined product, screen and collect particles in the 50 - 100 nm particle size range to obtain an antibacterial powder; S5. Mix the antibacterial powder and polyester powder evenly at a mass ratio of 1:8 - 10; S6. Make the mixed powder into an antibacterial masterbatch through a granulating device; S7. Spin the antibacterial masterbatch into antibacterial polyester filaments through a spinning machine, and blend the antibacterial polyester filaments with cotton filaments to obtain an antibacterial polyester-cotton blended fabric.

2. The preparation method of an antibacterial polyester-cotton blended fabric according to claim 1, wherein: In the antibacterial polyester-cotton blended fabric, the mass ratio of antibacterial polyester filaments to cotton filaments is 60 - 70:30 - 40.

3. The preparation method of an antibacterial polyester-cotton blended fabric according to claim 1, characterized in that: The silicate mineral is selected from one or more of palygorskite, montmorillonite, and illite.

4. The preparation method of an antibacterial polyester-cotton blended fabric according to claim 1, characterized in that: The copper ion solution is prepared from one or more of copper sulfate, copper nitrate, and copper chloride.

5. The preparation method of an antibacterial polyester-cotton blended fabric according to claim 1, characterized in that: The antibacterial polyester filament has a core-sheath composite structure and is composed of a polyester cortex and an antibacterial core layer; the thickness of the polyester cortex is 15 - 30% of the diameter of the antibacterial polyester filament, and the polyester cortex has a microporous structure with a porosity of 15 - 25%.

6. The preparation method of an antibacterial polyester-cotton blended fabric according to claim 5, characterized in that: The antibacterial polyester filament is prepared by the following steps: a. Mix polyester powder and sodium chloride powder evenly at a mass ratio of 7:2 - 3 to prepare a polyester cortex masterbatch; b. Melt the polyester cortex masterbatch and the core layer masterbatch respectively, and then spin them through a core-sheath type composite spinning machine to obtain core-sheath composite structure fibers; c. Wash the core-sheath composite structure fibers to dissolve the sodium chloride particles in the cortex to form a through microporous structure, and then dry to obtain antibacterial polyester filaments.

7. An antibacterial polyester-cotton blended fabric prepared by the method for preparing an antibacterial polyester-cotton blended fabric according to any one of claims 1 - 6.