Preparation method of biodegradable regenerated polyester staple fibers

Abstract

The invention discloses a preparation method of biodegradable regenerated polyester staple fibers, which is characterized by comprising the steps of drying spinning materials by a vacuum drum, mixing with biodegradable master batch dried by a master batch drying system at the feed inlet of a screw extruder; preparing primary fibers after mixing and fusing by the screw extruder and extruding by a spinneret plate; cooling primary fibers by an annular blowing device; successively carrying out winding, falling, bundling and time balancing on the primary fibers in a constant temperature and constant-humidity room; stretching the primary fibers in oil bath and stream respectively; performing curling, relaxation heat setting, cutting and packaging to obtain biodegradable regenerated polyester staple fibers, wherein physical properties and mechanical properties of the biodegradable regenerated polyester staple fibers produced by the method do not change, and therefore, the subsequent processing and usage are not influenced; after being used, the fibers can be decomposed into inert humus, carbon dioxide and water in a microorganism-enriching environments such as refuse landfill or composting site, thereby returning to nature and achieving real biodegradation.

Description

technical field

[0001] The invention relates to a preparation method of regenerated polyester fiber, in particular to a preparation method of biodegradable regenerated polyester staple fiber. Background technique

[0002] Aromatic polyesters represented by PET have been widely used in chemical fiber and packaging industries due to their excellent chemical stability, good mechanical properties, hygienic properties, and transparency. However, PET polyester waste is difficult to degrade naturally in nature. Polyester bottles exist in an environment with a humidity of 45%-100% and a temperature of 20°C for 30-40 years, and their performance is only 50% lost; the same conditions Under normal circumstances, polyester film can exist for 90-100 years, so a large amount of polyester waste will bring huge pressure to the environment.

[0003] The recycling of polyester waste can not only solve the problem of environmental pollution, but also realize the full utilization of resources,...

Examples

Embodiment 1

[0031] A kind of preparation method of biodegradable recycled polyester staple fiber of the present invention, realizes by following steps:

[0032] 1. 2150.4 kg of waste PET bottle flakes, 75 kg of friction material, 75 kg of foam material, 75 kg of plastic sheet and 0.6 kg of fluorescent whitening agent are used as raw materials for spinning; the melting point of waste PET bottle flakes is 260°C, and the viscosity is 0.72 dl / g, PVC content is 0.020wt%; friction material melting point is 255°C, viscosity is 0.64dl / g, PVC content is 0.028wt%; bubble material melting point is 253°C, viscosity is 0.60dl / g, PVC content is 0.025wt%; the melting point of the blister sheet is 258°C, the viscosity is 0.65dl / g, and the PVC content is 0.032wt%;

[0033] Among them, chemical fiber friction materials, foam materials and blister sheets can come from various PET wastes, such as polyester filament waste, staple fiber waste, polyester syringe waste, X-ray film waste, film waste, and melt fil...

Embodiment 2

[0042] A kind of preparation method of biodegradable recycled polyester staple fiber of the present invention, realizes by following steps:

[0043] 1. 1901.4 kg of waste PET bottle flakes, 150 kg of friction material, 150 kg of foam material, 150 kg of plastic sheet and 0.6 kg of fluorescent whitening agent are used as raw materials for spinning; the melting point of waste PET bottle flakes is 262°C and the viscosity is 0.75 dl / g, PVC content is 0.024wt%; friction material melting point is 255°C, viscosity is 0.65dl / g, PVC content is 0.026wt%; bubble material melting point is 254°C, viscosity is 0.62dl / g, PVC content is 0.020wt%; the melting point of the blister sheet is 260°C, the viscosity is 0.62dl / g, and the PVC content is 0.040wt%;

[0044] Among them, chemical fiber friction materials, foam materials, and blister sheets come from various PET wastes, including polyester filament waste, short fiber waste, polyester syringe waste, X-ray film waste, film waste, and melt fil...

Embodiment 3

[0053] A kind of preparation method of biodegradable recycled polyester staple fiber of the present invention, realizes by following steps:

[0054] 1. 1727.4 kg of waste PET bottle flakes, 200 kg of friction material, 200 kg of foam material, 200 kg of plastic sheet and 0.6 kg of fluorescent whitening agent are used as raw materials for spinning; the melting point of waste and old PET bottle flakes is 265°C and the viscosity is 0.78 dl / g, PVC content is 0.010wt%; friction material melting point is 255°C, viscosity is 0.62dl / g, PVC content is 0.025wt%; bubble material melting point is 256°C, viscosity is 0.65dl / g, PVC content is 0.020wt%; the melting point of the blister sheet is 260°C, the viscosity is 0.58dl / g, and the PVC content is 0.025wt%;

[0055] Among them, chemical fiber friction materials, foam materials, and blister sheets come from various PET wastes, such as polyester filament waste, staple fiber waste, polyester syringe waste, X-ray film waste, film waste, and m...

technical field

[0001] The invention relates to a preparation method of regenerated polyester fiber, in particular to a preparation method of biodegradable regenerated polyester staple fiber. Background technique

[0002] Aromatic polyesters represented by PET have been widely used in chemical fiber and packaging industries due to their excellent chemical stability, good mechanical properties, hygienic properties, and transparency. However, PET polyester waste is difficult to degrade naturally in nature. Polyester bottles exist in an environment with a humidity of 45%-100% and a temperature of 20°C for 30-40 years, and their performance is only 50% lost; the same conditions Under normal circumstances, polyester film can exist for 90-100 years, so a large amount of polyester waste will bring huge pressure to the environment.

[0003] The recycling of polyester waste can not only solve the problem of environmental pollution, but also realize the full utilization of resources,...

Examples

Embodiment 1

[0031] A kind of preparation method of biodegradable recycled polyester staple fiber of the present invention, realizes by following steps:

[0032] 1. 2150.4 kg of waste PET bottle flakes, 75 kg of friction material, 75 kg of foam material, 75 kg of plastic sheet and 0.6 kg of fluorescent whitening agent are used as raw materials for spinning; the melting point of waste PET bottle flakes is 260°C, and the viscosity is 0.72 dl / g, PVC content is 0.020wt%; friction material melting point is 255°C, viscosity is 0.64dl / g, PVC content is 0.028wt%; bubble material melting point is 253°C, viscosity is 0.60dl / g, PVC content is 0.025wt%; the melting point of the blister sheet is 258°C, the viscosity is 0.65dl / g, and the PVC content is 0.032wt%;

[0033] Among them, chemical fiber friction materials, foam materials and blister sheets can come from various PET wastes, such as polyester filament waste, staple fiber waste, polyester syringe waste, X-ray film waste, film waste, and melt fil...

Embodiment 2

[0042] A kind of preparation method of biodegradable recycled polyester staple fiber of the present invention, realizes by following steps:

[0043] 1. 1901.4 kg of waste PET bottle flakes, 150 kg of friction material, 150 kg of foam material, 150 kg of plastic sheet and 0.6 kg of fluorescent whitening agent are used as raw materials for spinning; the melting point of waste PET bottle flakes is 262°C and the viscosity is 0.75 dl / g, PVC content is 0.024wt%; friction material melting point is 255°C, viscosity is 0.65dl / g, PVC content is 0.026wt%; bubble material melting point is 254°C, viscosity is 0.62dl / g, PVC content is 0.020wt%; the melting point of the blister sheet is 260°C, the viscosity is 0.62dl / g, and the PVC content is 0.040wt%;

[0044] Among them, chemical fiber friction materials, foam materials, and blister sheets come from various PET wastes, including polyester filament waste, short fiber waste, polyester syringe waste, X-ray film waste, film waste, and melt fil...

Embodiment 3

[0053] A kind of preparation method of biodegradable recycled polyester staple fiber of the present invention, realizes by following steps:

[0054] 1. 1727.4 kg of waste PET bottle flakes, 200 kg of friction material, 200 kg of foam material, 200 kg of plastic sheet and 0.6 kg of fluorescent whitening agent are used as raw materials for spinning; the melting point of waste and old PET bottle flakes is 265°C and the viscosity is 0.78 dl / g, PVC content is 0.010wt%; friction material melting point is 255°C, viscosity is 0.62dl / g, PVC content is 0.025wt%; bubble material melting point is 256°C, viscosity is 0.65dl / g, PVC content is 0.020wt%; the melting point of the blister sheet is 260°C, the viscosity is 0.58dl / g, and the PVC content is 0.025wt%;

[0055] Among them, chemical fiber friction materials, foam materials, and blister sheets come from various PET wastes, such as polyester filament waste, staple fiber waste, polyester syringe waste, X-ray film waste, film waste, and m...

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