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An environmental protective wet towel and preparation method

A technology for wet wipes and environmental protection, applied in the direction of melt spinning, cardboard products, etc., can solve the problems of complex production process, difficult recycling, difficult decomposition, etc., and achieve the effect of low price, no irritation to the skin, and low cost

Inactive Publication Date: 2007-12-26
JIANGXI NAT BRIDGE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the two are beneficial to a wide range, the production process is complicated, the cost is high, the energy consumption is large, a large amount of water pollution is easy to be generated, and it is not easy to recycle and decompose.
Wet towels are mainly made of cotton yarn. Although the pollution is not large and the recycling rate is high, the bleaching and dyeing process in the production process will also produce a lot of water pollution.

Method used

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  • An environmental protective wet towel and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Using poly-L-lactic acid with a melt index of about 30 and no moisture as raw material, first dry the air with a dew point lower than -30°C in an environment of 80°C to a temperature higher than 0.015m 3 / min flow rate for drying for 6 hours, until the moisture content is below 50ppm, and then conveying;

[0044] A screw extruder with a length-to-diameter ratio of 24 and a compression ratio of 3 is used. The spinning screw adopts four-stage heating, and the temperature of each stage is as follows: feeding section 25°C, zone 1 200°C, zone 2 220°C, zone 3 230°C, four zones 235°C, spinning pump temperature 235°C;

[0045] After the polylactic acid resin is extruded and melted, remove impurities; the degree of pre-filtration for removing impurities should reach 20 microns, and the filter screen of the fine filter should be 400-mesh filter screen;

[0046] During spinning, the aperture of the spinneret is 0.2mm, the aspect ratio is 2, and the temperature of the spinning hea...

Embodiment 2

[0054] Using poly-L-lactic acid with a melt index of about 30 and no moisture as raw material, first dry the air with a dew point below minus 30°C in an environment of 80°C to a temperature higher than 0.015m 3 / min flow rate for drying for 6 hours, until the moisture content is below 50ppm, and then conveying;

[0055] A screw extruder with a length-to-diameter ratio of 28 and a compression ratio of 3 is used. The spinning screw adopts four-stage heating, and the temperature of each stage is as follows: feeding section 25°C, zone 1 195°C, zone 2 215°C, zone 3 225°C, 230°C in the fourth zone, 235°C spinning pump temperature;

[0056] After the polylactic acid resin is extruded and melted, remove impurities; the degree of pre-filtration for removing impurities should reach 20 microns, and the filter screen of the fine filter should be 300-mesh filter screen;

[0057] During spinning, the aperture of the spinneret is 0.35mm, the aspect ratio is 2, and the temperature of the spi...

Embodiment 3

[0066] Using poly L-lactic acid with a melt index of about 30 as the raw material, first dry the air with a dew point below minus 30°C in an environment of 85°C at a temperature of 0.03m 3 / min flow rate for drying for 6 hours, until the moisture content is below 50ppm, and then conveying;

[0067] A screw extruder with a length-to-diameter ratio of 26 and a compression ratio of 3 is used. The spinning screw adopts four-stage heating, and the temperature of each stage is as follows: feeding section 25°C, zone 1 200°C, zone 2 225°C, zone 3 235°C, four zones 235°C, spinning pump temperature 237°C;

[0068] After the polylactic acid resin is extruded and melted, remove impurities; the degree of pre-filtration for removing impurities should reach 20 microns, and the filter screen of the fine filter should be 300-mesh filter screen;

[0069] During spinning, the aperture of the spinneret is 0.25 mm, the aspect ratio is 2, and the temperature of the spinning head is 237°C, which is...

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Abstract

The invention relates to an environment protection wet cloth and the manufacture method. The cloth is made from spinning stick non-woven fabrics that is produced from poly lactic acid resin. The method includes the following steps: drying poly lactic acid resin raw material to water content under 50ppm, heating, extruding and melting, removing impurity; taking spinning under 250deg.C, cooling to form poly lactic acid original filament, taking flow drafting to the filament to form poly lactic acid filament and spreading to net, solidifying to form non-woven fabrics, and cutting and dipping. The product has wide raw material resources, soft handle, etc. The process has low energy consumption and almost no waste water and waste gas.

Description

technical field [0001] The invention relates to an environment-friendly wet wipe and a preparation method thereof, in particular to a wet wipe using non-woven fabric as the main raw material and a preparation method thereof. Background technique [0002] With the development of social economy and the improvement of people's living standards, wet wipes have become one of the necessities of people's life, and the consumption is also increasing. At present, wet wipes mainly include wet paper towels and wet towels. In addition to disinfectant, the raw materials used to make wet wipes mainly include paper towels and spunlace non-woven fabrics. The main raw material for tissue paper production is wood pulp, but there are also a small number of enterprises that produce tissue paper from mixed waste paper pulp, white edge paper, rice straw pulp, bagasse pulp, papermaking tail pulp, and waste cotton pulp that have been simply deinked and bleached; The spunlace non-woven fabric main...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B31D1/04D01D5/08
Inventor 杨自然计建中张闯
Owner JIANGXI NAT BRIDGE IND
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