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Method for preparing needle-punched geotextile for bituminous waterproof sheet materials with polyester bottle chips as raw materials

A technology of asphalt waterproof membrane and polyester bottle flakes, which is applied in non-woven fabrics, melt spinning, filament forming treatment, etc., can solve the problems of wasting resources, polluting the environment, and high costs, and achieve energy saving and production cost reduction , The effect of reducing production costs

Active Publication Date: 2016-07-27
DALIAN HUAYANG NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it is a one-time use, not only waste resources, pollute the environment, but also the cost is higher
[0003] Polyester bottle flakes are used as raw materials to produce filament POY and FDY. Some special requirements for polyester spunbonded needle-punched nonwoven fabrics for tire base. With the current production methods and processes, polyester bottle flakes cannot be used as raw materials to produce needle-punched geotextiles for asphalt waterproof membranes.

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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  • Method for preparing needle-punched geotextile for bituminous waterproof sheet materials with polyester bottle chips as raw materials

Examples

Experimental program
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Effect test

Embodiment 1

[0017] The recovered polyester bottle flakes are pre-crystallized at 170°C in a pre-crystallizer with a drying capacity of 600Kg / h and dried at 160°C, so that the moisture content of the dry bottle flakes is controlled at 48PPM. After pre-crystallization and drying, the polyester bottle flakes enter the screw extruder for melt extrusion. The temperature of each zone of the screw extruder: 276°C, 281°C, 284°C, 285°C, 285°C, 285°C, and then enter the filter. Its filtration accuracy is 50μ. The recycled material melt filtered by the filter is mixed in the pipeline and enters the reactor together. The melt goes through processes such as hydrolysis, alcoholysis, homogenization, impurity removal and repolymerization, and finally obtains a polyester melt whose viscosity is adjusted to 0.72±0.01dl / g, and then is boosted by a booster pump and filtered through a filter into the spinning Silk machine, its filtration precision is 25μ. Metered by the metering pump, sprayed into filaments...

Embodiment 2

[0019] Using polyester bottle flakes as raw material, the process is the same as Example 1, the specific parameters are as follows: drying capacity: 600Kg / h, pre-crystallization temperature: 171°C, drying temperature: 164°C, moisture content of bottle flakes after drying: 45ppm, screw The temperature of each zone of the extruder: 276°C, 281°C, 284°C, 286°C, 286°C, 286°C, and then enter the filter with a filtration accuracy of 50μ. The recycled material melt filtered by the filter is mixed in the pipeline and enters the reactor together. The melt goes through processes such as hydrolysis, alcoholysis, homogenization, impurity removal and repolymerization, and the final viscosity is adjusted to 0.75±0.01dl / g polyester melt, which is then pressurized by a booster pump and filtered into the spinning Silk machine, its filtration precision is 25μ. Metered by the metering pump, sprayed into filaments from the spinneret, spinning temperature: 287°C, component pressure: 14Mpa, side bl...

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

A method for preparing needle-punched geotextile for bituminous waterproof sheet materials with polyester bottle chips as raw materials is characterized by comprising the steps that polyester bottle chips are pre-crystallized and dried, and then enter an extruder to be extruded, reclaimed material melt filtered through a filter is mixed in a pipeline, and then the mixture enters a reactor together; the melt is subjected to processes such as hydrolysis, alcoholysis, homogenization and impurity removing re-aggregation, and finally polyester melt with the viscosity homogenized and stabilized is obtained; the polyester melt is pressurized through a booster pump and filtered through a filter, then enters a spinning machine, and is metered and sprayed out of a spinneret plate to form filaments, the filaments are cooled with side-blowing air, drafted with tubular air flow, split and arranged, and form a uniform fiber net on a netting machine, the fiber net is conveyed out to a needling machine for needle-punched consolidation, slitting and winding, and the needle-punched geotextile for bituminous waterproof sheet materials is obtained. According to the method, the waste polyester bottle chips serve as the raw materials, and thus the waste polyester bottle chips can be recycled; besides, energy saving is promoted, and the production cost of the needle-punched geotextile for bituminous waterproof sheet materials is reduced.

Description

technical field [0001] The invention relates to a preparation method of a chemical fiber nonwoven product, in particular to a preparation method of a needle-punched geotextile for producing asphalt waterproof coiled material. Background technique [0002] The asphalt waterproof membrane tire base cloth currently used in my country is mainly based on short-fiber polyester tires. It is made into non-woven fabric by stretching and needle-punching consolidation, and then it is made by shaping, dipping and drying. However, due to its many performance defects, foreign developed countries basically do not use or seldom use it as the base of modified bitumen waterproof membrane. With the advancement of technology, in recent years, my country has also developed a bitumen waterproof membrane using polyester filament tire base cloth as the base tire, and its raw material is polyester chips. However, it is a one-time use, which not only wastes resources and pollutes the environment, bu...

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): D04H3/011D04H3/105D01D1/00D01D1/10D01D5/08
Inventor 智来宽史敬月吴昊
Owner DALIAN HUAYANG NEW MATERIALS TECH CO LTD