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Full-degradation lactic acid polymer spun-bonded continuous yarn non-woven fabrics and preparation method thereof

A technology of lactic acid polymer and filament non-woven fabric, which is applied in the direction of single-component polyester artificial filament, filament molding treatment, and melting of filament raw materials, which can solve the problem of high cost, impossible preparation of polylactic acid fiber, Inability to adapt to issues such as affordability

Inactive Publication Date: 2008-02-13
豆丁乐园(南京)婴儿用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] ZL200410017776.0 of Donghua University discloses a kind of superfine polylactic acid fiber nonwoven fabric, may be due to being suitable for the reason of medicine (special requirement of blood filtration), it does not carry out transformation to existing nonwoven fabric equipment and directly Using the existing non-woven fabric technology, this method that does not fully consider the characteristics of polylactic acid is basically impossible to prepare conventional polylactic acid fibers, but can only be made into ultrafine polylactic acid fibers as much as possible on the basis of increasing the temperature to prepare Non-woven fabrics, but the thickness of non-woven fabrics is 0.6-1.4mm and basically offsets the benefits of using ultra-fine fibers
In addition, it cannot adapt to large-scale industrial production in terms of temperature control and wire output speed.
As a result, the cost is high and cannot meet the price affordability of the market

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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  • Full-degradation lactic acid polymer spun-bonded continuous yarn non-woven fabrics and preparation method thereof
  • Full-degradation lactic acid polymer spun-bonded continuous yarn non-woven fabrics and preparation method thereof
  • Full-degradation lactic acid polymer spun-bonded continuous yarn non-woven fabrics and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]Polylactic acid (PLA) slices (molecular weight of 100,000, melt index of 20-25, melting point of 180°C, thermal cracking temperature of 300°C) are fully dried through continuous drying equipment, and the slices are sucked from the trough to the The pre-spinning hopper, the feeding process is intermittent automatic feeding. Chips fall from the pre-spinning hopper into the screw extruder by its own weight, and the sleeve of the extruder is heated in different regions. The slices are extruded and melted in the extruder, then enter the continuous pre-filter, and then enter the spinning box. The melt enters the spinning head through the metering pump, and is accurately metered by the metering pump, and the melt is quantitatively transported to the spinneret, and forms a continuous melt stream through the 0.2mm spinneret hole, that is, the primary fiber. The screw extrusion temperature is 180°C, the box temperature is 160-220°C, the spinning speed is 800m / min, and the as-spun...

Embodiment 2

[0042] Fully dry polylactic acid (PLA) slices (molecular weight 130,000, melt index 20-25, melting point 170°C, thermal cracking temperature 280°C) through continuous drying equipment, and the slices are sucked from the trough to the The pre-spinning hopper, the feeding process is intermittent automatic feeding. Chips fall from the pre-spinning hopper into the screw extruder by its own weight, and the sleeve of the extruder is heated in different regions. The slices are extruded and melted in the extruder, then enter the continuous pre-filter, and then enter the spinning box. The melt enters the spinning head through the metering pump, and is accurately metered by the metering pump, and the melt is quantitatively transported to the spinneret, and forms a continuous stream of melt through the 1mm spinneret hole, that is, the primary fiber. The extrusion temperature of the screw is 150°C, the temperature of the box is 160-220°C, the spinning speed is 550m / min, and the as-spun f...

Embodiment 3

[0044] Polylactic acid (PLA) slices (molecular weight 80,000, melt index 20-25, melting point 200°C, thermal cracking temperature 350°C) are fully dried through continuous drying equipment, and the slices are sucked from the trough to the spinning machine by a fan. The front hopper, the feeding process is intermittent automatic feeding. Chips fall from the pre-spinning hopper into the screw extruder by its own weight, and the sleeve of the extruder is heated in different regions. The slices are extruded and melted in the extruder, then enter the continuous pre-filter, and then enter the spinning box. The melt enters the spinning head through the metering pump, and is accurately metered by the metering pump, and the melt is quantitatively transported to the spinneret, and forms a continuous stream of melt through the 0.3mm spinneret hole, that is, the primary fiber. The extrusion temperature of the screw is 200°C, the temperature of the box is 160-220°C, the spinning speed is ...

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 discloses a complete degradation poly (lactic acid) spun-bond filament non-woven cloth, which is rolled and bonded by a fiber web which is paved with PLA fiber with average fiber fineness of 0.12 to 1mm. The mass per area of the cloth is 25 to 100g / m2, the thickness is 0.1 to 0.5mm, the longitudinal extensibility is 12 to 16percent and the lateral extensibility is 15 to 21percent. The invention also discloses a method of preparing the complete degradation poly (lactic acid) spun-bond filament non-woven cloth. The invention has good biological degradability and biological composing capability, and the physical mechanical performance is based on the traditional PET; the chips within the used molecular weight range are stable during the filament spinning process, have low sensitivity to the temperature changes, and the spinning continuity and stability are good; the invention is applicable in industrial operation.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and in particular relates to a fully degradable lactic acid polymer non-woven fabric obtained by using polylactic acid as a raw material by a filament spunbonding method and a preparation method thereof. Background technique [0002] With the strengthening of social environmental awareness, the development and application of biodegradable polymers has attracted great attention. Polylactic acid (PLA) is a representative of chemically synthesized biodegradable lipopolyester. It has good biocompatibility and safety, is non-toxic and harmless to the human body, and gradually degrades in the body and in the natural environment, and finally becomes carbon dioxide and water. In addition, the monomer of polylactic acid is lactic acid, which is fermented from renewable resource starch (extracted from corn, wheat and potatoes), and the source of raw materials is very rich. [0003] Polylactic acid...

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): D04H3/14D01F6/62D01D1/04D01D1/10
Inventor 柳铭
Owner 豆丁乐园(南京)婴儿用品有限公司
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