Polylactic acid self-curled and self-bonded composite cigarette tow and preparation method thereof

A self-crimping, polylactic acid technology, applied in the direction of conjugated synthetic polymer rayon, rayon manufacturing, application, etc., can solve the problem of low rod out rate of polylactic acid fiber, reducing the crystallinity of cortex resin, polylactic acid fiber Specific gravity and other problems, to achieve good biodegradation performance, reduce production costs, permanent fluffy and elastic satisfaction effects

Inactive Publication Date: 2018-10-12
CHANGSHU GOLD SPRING CHEM FIBERS & KNITTINGS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polylactic acid fibers have the following problems in the tobacco tow processing technology and filter rod forming process: polylactic acid fibers lack safe and effective binders such as glycerol triacetate, so in order to meet the filter rod suction resistance, hardness and appearance and other requirements, more tows must be filled, resulting in a low yield of polylactic acid fiber tows. At the same time, compared with cellulose acetate and polypropylene fibers, the specificity of polylactic acid fibers is large, which will also cause a significant increase in cost.
However, it is necessary to increase the content of dextrorotary units in the cortex resin or use lactide and glycolide or caprolactone copolymerization, thereby reducing the crystallinity of the cortex resin, and at the same time, strictly control the content of polylactic acid dextrorotary units in the core resin or Adding a crystallization accelerator to improve the crystallinity of the core resin, therefore, this patent has higher requirements on raw materials and stricter production process

Method used

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  • Polylactic acid self-curled and self-bonded composite cigarette tow and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Fiber-grade polylactic acid LX130U produced by Corbion Company in the Netherlands is preferably used, with a melting temperature of 155° C. and a melt index of 3 g / 10 min (190° C., 2.16 kg). Before spinning, drying treatment was carried out at a drying temperature of 100° C. for 5 hours using drum drying equipment, and the moisture content was controlled to be below 200 ppm.

[0032] Spinning, the mass percentage that the polylactic acid resin is used is 0.5% antioxidant, 0.5% antifungal agent and 0.5% antistatic agent and other spinning aids are added in the described polylactic acid resin through quantitative feeding device, through The single-screw extruder is melted and plasticized at 200°C to obtain the above conventional polylactic acid resin (conventional polylactic acid resin refers to polylactic acid resin without plasticizer, the same below) melt, and the corresponding mass percentage is 0.5% polyethylene glycol and its copolyester, 0.5% citric acid ester as a...

Embodiment 2

[0036] Fiber-grade polylactic acid LX130U produced by Corbion Company in the Netherlands is preferably used, with a melting temperature of 155° C. and a melt index of 3 g / 10 min (190° C., 2.16 kg). Before spinning, drying treatment was carried out at a drying temperature of 100° C. for 5 hours using drum drying equipment, and the moisture content was controlled to be below 200 ppm.

[0037] For spinning, the spinning aids such as 0.5% antioxidant, 0.5% fungicide and 0.5% antistatic agent used in the polylactic acid resin are added to the polylactic acid resin through a quantitative feeding device, and passed through a single screw. The extruder is melted and plasticized at 200°C to obtain the above-mentioned conventional polylactic acid resin melt, and correspondingly, 0.5% by mass of polyethylene glycol and its copolyester, and 0.5% of citric acid ester are used as plasticizers. Spinning aids and the same proportion of spinning aids are metered into the polylactic acid resin ...

Embodiment 3

[0041] Fiber-grade polylactic acid LX130U produced by Corbion Company in the Netherlands is preferably used, with a melting temperature of 155° C. and a melt index of 3 g / 10 min (190° C., 2.16 kg). Before spinning, drying treatment was carried out at a drying temperature of 100° C. for 5 hours using drum drying equipment, and the moisture content was controlled to be below 200 ppm.

[0042]For spinning, the spinning aids such as 0.5% antioxidant, 0.5% fungicide and 0.5% antistatic agent used in the polylactic acid resin are added to the polylactic acid resin through a quantitative feeding device, and passed through a single screw. The extruder is melted and plasticized at 200°C to obtain the above-mentioned conventional polylactic acid resin melt, and the corresponding mass percentage is 0.5% of aliphatic dibasic acid glycol ester oligomer and 0.5% of glyceride as The plasticizer and the spinning aid in the same proportion are metered into the polylactic acid resin through a q...

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Abstract

The invention discloses a polylactic acid self-curled and self-bonded composite cigarette tow and a preparation method thereof. The preparation method comprises the following steps: drying polylacticresin; adding a spinning assistant for the polylactic resin into conventional polylactic resin, adding the spinning assistant to polylactic resin containing a plasticizer, and performing melting plasticization to obtain a polylactic resin melt; spraying the melt from a spinneret hole to form single composite fibers; cooling a polylactic acid two-component cigarette tow; oiling the two-component tow, and carrying out drafting and tension heat setting to obtain the polylactic acid self-curled and self-bonded composite cigarette tow. The single fibers in the tow is one of a side-by-side, orange-slice, sheath-core and sea-island composite structures, one of the components of the side-by-side type or the orange-slice type structure is the polylactic resin containing the plasticizer, and the remaining component is the conventional polylactic resin and a composition thereof. The preparation method has the advantages of simplification of the production process, avoiding of mechanical and thermal damages, increase of the rod yield of the polylactic fiber tow, and reduction of the production cost; and the polylactic acid self-curled and self-bonded composite cigarette tow has a good biodegradability.

Description

technical field [0001] The invention belongs to the technical field of tobacco tow and its preparation, in particular to a polylactic acid self-crimping and self-adhesive composite tobacco tow, and also relates to a preparation method thereof. Background technique [0002] Cigarette tow is an important part of cigarette filter rods. Through direct interception, inertial compaction and diffusion and precipitation, it can effectively reduce the smoke, tar and suspended particles produced during smoking, improve the taste and improve the quality of cigarettes. . At present, the tobacco tow materials on the market are mainly cellulose acetate tow, and a small amount of polypropylene fiber tow is used. The filter rod produced by cellulose acetate tow has excellent comprehensive performance and is mainly used for middle and high-end cigarettes. However, cellulose acetate tow is made of high-quality wood, and it undergoes a series of processes such as pulping, activation, acetylat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01F1/10A24D3/08D01D5/08D01D5/28D01D5/16D01D10/02D01D1/00D01D5/088
CPCA24D3/08D01D1/00D01D5/08D01D5/088D01D5/16D01D5/28D01D10/02D01F1/10D01F8/14
Inventor 王宁杨新华刘薇李文俊樊海彬
Owner CHANGSHU GOLD SPRING CHEM FIBERS & KNITTINGS
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