High-efficiency antibacterial mildew-proof PLA (poly lactic acid) fiber with skin-core structure and preparation method thereof

An antibacterial and antifungal, skin-core structure technology, applied in fiber treatment, fiber chemical characteristics, melt spinning, etc., can solve the problems of uneven physical and chemical properties of products, difficult process control, long production process, etc., and achieve broad-spectrum antibacterial Antibacterial and antifungal effects, improved antibacterial and antifungal properties, and low-cost effects

Inactive Publication Date: 2011-10-12
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The twin-screw method and the sea-island composite method have long production processes, complicated procedures, difficult process control, and uneven physical an

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) 100 parts by weight of PLA resin, 1.5 parts by weight of antibacterial agent zinc-containing inorganic ultrafine antibacterial powder, and 1.5 parts by weight of antifungal agent Thiabendazole are mixed uniformly; melt blending with a twin-screw extruder, Extrusion granulation, the extrusion temperature is 170 ° C, the screw speed is 100 rpm, and the plasticizer dibutyl phthalate (DBP) 2 parts by weight, the compatibilizer vinyltrimethoxysilane are added through the metering pump during extrusion (A-171) 2 parts by weight, and 2 parts by weight of sodium lauryl sulfate as a dispersant to prepare blend slices.

[0030](2) Then the blend slices are dried to make the moisture content reach 100-150ppm, the dried blend slices are used as the cortex, and the dried PLA resin is used as the core layer, and the skin-core volume ratio is 2:8. The antibacterial and mildew-proof fiber is prepared by the skin-core composite spinning machine, the spinning temperature is 210-220°C...

Embodiment 2

[0033] (1) 100 parts by weight of PLA resin, 4.5 parts by weight of antibacterial agent silver-containing inorganic ultrafine antibacterial powder, antifungal agent chlorothalonil (2,4,5,6-tetrachloro-1,3-dicyanobenzene ) 4.5 parts by weight, the raw materials of the composition are mixed evenly; melt blending, extruding and granulating with a twin-screw extruder, the extrusion temperature is 200 ° C, the screw speed is 150 rpm, and the plasticizer o-phthalic acid is added through a metering pump during extrusion 2 parts by weight of dioctyl diformate (DOP), 2 parts by weight of vinyltriethoxysilane (A-151) as a compatibilizer, and 2 parts by weight of sodium tripolyphosphate as a dispersant, to prepare blend slices.

[0034] (2) Then the blend slices are dried to make the moisture content reach 150-200ppm, the dried blend slices are used as the cortex, the dried PLA resin is used as the core layer, and the skin-core volume ratio is 3: 7. The antibacterial and mildew-proof fib...

Embodiment 3

[0037] (1) 100 parts by weight of PLA resin, 7.5 parts by weight of antibacterial agent copper-containing inorganic ultrafine antibacterial powder, 7.5 parts by weight of antifungal agent carbendazim (N-(2-benzoimidazolyl)-methyl carbamate) , the raw materials of composition are mixed evenly; Use twin-screw extruder melt blending, extrusion granulation, extrusion temperature is 220 ℃, screw speed is 250rpm, adds plasticizer epoxy soybean oil 3 weight by metering pump during extrusion 3.5 parts by weight of the compatibilizer γ-aminopropyltriethylsiloxane (KH-550), and 5 parts by weight of the dispersant sodium hexametaphosphate to prepare blend slices.

[0038] (2) Then the blend slices are dried to make the moisture content reach 300-400ppm, the dried blend slices are used as the cortex, the dried PLA resin is used as the core layer, and the skin-core volume ratio is 4: 6. The antibacterial and mildew-proof fiber is prepared by the sheath-core composite spinning machine, the ...

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Abstract

The invention relates to a high-efficiency antibacterial mildew-proof PLA (poly lactic acid) fiber which is a skin-core structure and a preparation method thereof. The PLA fiber comprises a skin layer and a core layer, wherein the skin layer comprises PLA resin, an antibacterial agent, a mildew preventive, a plasticizer, a compatilizer and a dispersing agent; and the core layer comprises PLA resin. The preparation method of the high-efficiency antibacterial mildew-proof PLA fiber comprises the steps of: (1) mixing the PLA resin, the antibacterial agent, the mildew preventive, the plasticizer, the compatilizer and the dispersing agent, and then melting and blending the mixture to obtain dried blend chips; and (2) using the dried blend chips as the skin layer, using the PLA resin as the core layer, and obtaining the high-efficiency antibacterial mildew-proof PLA fiber through melting spinning, winding, drafting. The PLA fiber disclosed by the invention has high strength, good flexibility and obvious antibacterial and mildew-proof effect, can be biodegraded, and has broad application prospect; and the preparation method disclosed by the invention is simple, has low cost and low requirement on the equipment, and is suitable for mass production.

Description

technical field [0001] The invention belongs to the field of modified polylactic acid fiber material and its preparation, in particular to a preparation method of high-efficiency antibacterial and mildew-proof PLA fiber with a skin-core structure. Background technique [0002] Polylactic acid (PLA) is a kind of polymer material with a wide range of sources and is fully biodegradable. Because it can replace the increasingly depleted petroleum resources, it has attracted widespread attention at home and abroad in recent years. [0003] PLA fiber combines the advantages of natural fibers and synthetic fibers, and has unique properties in terms of moisture absorption and perspiration, flame retardancy, and UV resistance. It is widely used in clothing, non-woven fabrics, and indoor products; The mold performance is not good. When it is used as a material for automotive interior parts (such as carpets and rear trunk floors) for a long time, mold will gradually grow on the surface ...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01F1/10D01D5/08D01D5/34
Inventor 余木火孟涛杨淳徐晓倩潘礼存尤伟韩克清
Owner DONGHUA UNIV
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