Preparation method of marine corrosion-preventing non-woven fabric

A technology of non-woven fabrics and non-woven materials, applied in the field of functional non-woven materials, can solve environmental stress (sensitive to chemical and mechanical effects, not used in the field of anti-seawater corrosion, poor heat aging resistance, etc., to achieve low cost, Low water absorption and high fatigue strength

Inactive Publication Date: 2014-12-17
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN102408800A provides a heavy-duty anti-corrosion metal paint, which has a good anti-corrosion effect on metals, but it has not been used in the field of anti-corrosion in seawater, so it needs to further verify its anti-corrosion protection effect on seawater
Chinese patent CN102604191A uses a kind of anti-corrosion PE material, which has good corrosion resistance and insulation. However, polyethylene resin is very sensitive to environmental stress (chemical and mechanical effects), and has poor heat aging resistance, so it has a long service life. subject to certain restrictions
Chinese patent CN102876192A added neoprene, polytetrafluoroethylene, and polyvinyl acetate to the anti-corrosion layer. Although the high polymer materials added improved the anti-corrosion performance of the product, the impermeability of the product was poor
[0008] There are also some other patented technologies or literatures that mention the use of polyoxymethylene (POM) materials, but they are not used in the anti-corrosion protective layer

Method used

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Polyoxymethylene (POM) fibers with a length of 30 mm and a fiber fineness of 1.3 dtex were opened, carded into a web, and cross-laid to form a multi-layer fiber web, and then sent to an acupuncture machine for acupuncture reinforcement. The reinforced non-woven material is hot-rolled by a hot rolling mill. The pre-hot rolling temperature is 70°C, the hot-rolling pressure is 5MPa, and the output speed is 2.5m / min; forming hot-rolling means that the upper and lower rollers are heated at different temperatures , the heating temperature of the roller in contact with one side of the nonwoven material is 155°C, while the roller in contact with the other side is at room temperature, the hot rolling pressure is 15MPa, and the output speed is 1.4m / min, that is, the anti-seawater erosion nonwoven cloth.

[0031] After testing, the dense layer thickness accounts for 7% of the total thickness in the seawater erosion-proof nonwoven fabric of the present invention, the tensile breaki...

Embodiment 2

[0033] Polyoxymethylene (POM) fibers with a length of 38 mm and a fiber fineness of 2.1 dtex were opened, carded into a web, and cross-laid to form a multi-layer fiber web, and then sent to an acupuncture machine for acupuncture reinforcement. The reinforced non-woven material is hot-rolled by a hot-rolling machine, the pre-hot-rolling temperature is 70°C, the hot-rolling pressure is 6.5MPa, and the output speed is 3.0m / min; The heating temperature of the roller is 150°C, while the roller in contact with the other side is at normal temperature, the hot rolling pressure is 10MPa, and the output speed is 1.0m / min, that is, the seawater erosion-resistant nonwoven fabric is obtained.

[0034] After testing, the dense layer thickness accounts for 10% of the total thickness in the seawater erosion-proof nonwoven fabric of the present invention, the tensile breaking strength is 50.2MPa, the tensile breaking elongation is 61.1%, and the water pressure resistance is 6×10 4 Pa, the loss...

Embodiment 3

[0036] Polyoxymethylene (POM) fibers with a length of 43 mm and a fiber fineness of 2.9 dtex were opened, carded into a web, and cross-laid to form a multi-layer fiber web, and then sent to an acupuncture machine for acupuncture reinforcement. The reinforced non-woven material is hot-rolled by a hot-rolling machine, the pre-hot-rolling temperature is 90°C, the hot-rolling pressure is 7.5MPa, and the output speed is 4.0m / min; The heating temperature of the roller is 160° C., while the roller in contact with the other side is at normal temperature, that is, a seawater erosion-proof nonwoven fabric is obtained.

[0037] After testing, the dense layer thickness accounts for 15% of the total thickness in the seawater erosion-proof nonwoven fabric of the present invention, the tensile breaking strength is 58.7MPa, the tensile breaking elongation is 56.7%, and the water pressure resistance is 7.5×10 4 Pa, the loss rate of tensile breaking strength after 24 months of exposure to seawa...

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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Abstract

The invention provides a preparation method of marine corrosion-preventing non-woven fabric, which belongs to the technical field of function non-woven materials. The marine corrosion-preventing non-woven fabric is prepared by the flowing steps of opening and scotching polyformaldehyde (POM) fiber, carding to form a web, mechanical laying, needling reinforcement, and hot rolling. One side is a smooth and clean surface (a compact layer), the other side is a rough surface (an adhesive layer), and the thickness of the compact layer is 5 percent and 25 percent of the thickness of the whole non-woven protective layer; the smooth and clean surface (the compact layer) is in direct contact with sea water, so that the sea water can be prevented from permeating; the rough surface (the adhesive layer) is in direct contact with the protected part, and is tightly attached with the protected part. The marine corrosion-preventing non-woven fabric is strong in seawater corrosion resistance, has excellent water-repellency performance and flexibility, and can meet the requirement of practical application.

Description

technical field [0001] The invention relates to a preparation method of seawater erosion-resistant nonwoven fabric, which belongs to the technical field of functional nonwoven materials. Background technique [0002] The ocean can provide human beings with material resources, space resources and energy for survival and development. my country is a large ocean country, with a coastline of more than 18,000 kilometers, more than 6,500 coastal islands, and a sea area of ​​more than 3 million square kilometers under its jurisdiction. my country has abundant marine resources and a thriving marine industry, but the marine environment is very harsh and seawater is highly corrosive and rich in various microorganisms. Therefore, marine corrosion and protection is an urgent problem to be solved in my country's economic development. [0003] Polyoxymethylene (POM) is a linear polymer with a density of 1.43g / cm 3 , the melting point is between 153 and 170 ° C, and the crystallinity is ...

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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IPC IPC(8): D04H1/4326D04H1/48
Inventor 焦晓宁柯鹏严姣程博闻王桦
Owner TIANJIN POLYTECHNIC UNIV
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