阅读说明：本技术 一种蓬松锦纶长丝及其制备方法 (Fluffy nylon filament and preparation method thereof ) 是由 廉志军 于 2020-12-14 设计创作，主要内容包括：本发明公开了一种蓬松锦纶长丝及其制备方法,该蓬松锦纶长丝由两种或两种以上不同干热收缩率的锦纶长丝加工而成,所述锦纶长丝之间的干热收缩率差值不低于10％。该蓬松锦纶长丝与传统使用常规的锦纶FDY或POY直接进行空气变形制造有一定蓬松效果的锦纶长丝相比,本发明的蓬松锦纶长丝将不同热收缩率锦纶加捻并合,加网络后预缩,再进行空气变形加工制作蓬松性锦纶长丝的,其有益效果为所制作的蓬松性锦纶长丝线径更加均匀、蓬松性更好,而且长毛圈少,所制作的织物产品手感更加丰满。(The invention discloses a fluffy nylon filament and a preparation method thereof, the fluffy nylon filament is processed by two or more nylon filaments with different dry heat shrinkage rates, and the difference value of the dry heat shrinkage rates of the nylon filaments is not less than 10%. Compared with the traditional method for manufacturing the nylon filament with a certain fluffy effect by directly carrying out air deformation on the conventional nylon FDY or POY, the fluffy nylon filament provided by the invention has the beneficial effects that the yarns of the manufactured fluffy nylon filament are more uniform in diameter, better in fluffy property, less in long looped pile and more plump in hand feeling of the manufactured fabric product.)

1. The fluffy nylon filament is characterized by being processed by two or more nylon filaments with different dry heat shrinkage rates, and the difference value of the dry heat shrinkage rates of the nylon filaments is not less than 10%.

2. A bulky nylon filament according to claim 1, characterized in that the difference in dry heat shrinkage between the nylon filaments is 20 to 150%.

3. A bulky nylon filament according to claim 1 or 2, characterized in that said process comprises in sequence: combining and twisting the nylon filaments with different dry heat shrinkage rates; adding a network at a network nozzle; treating with a first hot box to generate shrinkage; blowing the powder by an air deformation nozzle; heat setting in a second hot box; after being oiled by an oiling yarn guide, the yarn is wound on a bobbin.

4. The fluffy nylon filament of claim 3, wherein two or more nylon filaments with different dry heat shrinkage rates are twisted, so that the low shrinkage nylon is spirally wrapped with the high shrinkage nylon.

5. A fluffy nylon filament according to claim 3, characterized in that the twisted nylon filament is added with a network by using a network nozzle, wherein the number of network nodes per meter is 20-200.

6. A fluffy nylon filament according to claim 3, characterized in that the networked nylon filament is overfed and fed into a first hot box for preshrinking, wherein the temperature of the first hot box is 60-250 ℃.

7. A bulky nylon filament according to claim 3, characterized in that the pre-shrunk nylon filament is overfed to an air texturing nozzle for blowing.

8. The fluffy nylon filament yarn of claim 3, wherein the nylon filament yarn subjected to air texturing is sent into a second hot box for shaping under certain tension, wherein the temperature of the second hot box is 90-210 ℃, and the shaping time is 1-120 s.

9. The preparation method of the fluffy nylon filament is characterized by comprising the following steps:

s1, combining and twisting two or more nylon filaments with different dry heat shrinkage rates, wherein the dry heat shrinkage rate difference between the nylon filaments is not less than 10%;

s2, adding a network at the network nozzle;

s3, shrinking through the first hot box treatment;

s4, blowing away through an air deformation nozzle;

s5, performing heat setting through a second hot box;

and S6, oiling by an oiling yarn guide, and winding the yarn on a bobbin.

10. The method for preparing fluffy nylon filaments according to claim 9, wherein the difference of dry heat shrinkage rates between the nylon filaments is 20-150%.

Technical Field

The invention relates to the technical field of textile chemical fibers, in particular to fluffy nylon filaments and a preparation method thereof.

Background

The chemical fiber filament yarns have various types, the manufacturing method is complex and various, common products comprise pre-oriented yarns (POY), drawn yarns (FDY), Drawn Textured Yarns (DTY), Air Textured Yarns (ATY) and the like, fibers are endowed with certain characteristics through various modes such as drawing, twisting, elasticizing, deformation and the like, the requirements of different fields and different products are met, the product types are more and more, the largest variety of the chemical fiber filament yarns is the polyester filament yarns at present, and the nylon filament yarns have certain difference in performance, wherein the polyester filament yarns have high modulus and good resilience, certain fluffiness is achieved after the elastic deformation, the modulus of the nylon filament yarns is low, the resilience is poor, and the fluffiness of the fibers is much lower than that of the polyester yarns only through the elastic deformation.

The fluffy nylon filament yarn is processed mainly by texturing through a texturing machine and a false twister or by air texturing equipment, the yarn is blown away by air flow, a looped pile is formed on the surface of the yarn, the fluffiness of the Air Textured Yarn (ATY) is better than that of low-stretch yarn (DTY), but the air textured yarn is influenced by low modulus and poor resilience of nylon fiber, and the conventional fluffy nylon filament yarn still has larger improvement and lifting space.

Disclosure of Invention

The invention aims to provide a fluffy nylon filament and a preparation method thereof, and solves one or more of the problems in the prior art.

On one hand, the fluffy nylon filament yarn is processed by two or more nylon filaments with different dry heat shrinkage rates, and the dry heat shrinkage rate difference between the nylon filaments is not lower than 10%. Wherein, the chinlon with different dry heat shrinkage rates can be obtained by the change of a drafting process or chinlon with different chemical compositions.

In some embodiments, the difference in dry heat shrinkage between the nylon filaments is from 20% to 150%.

In some embodiments, the process comprises, in order: combining and twisting the nylon filaments with different dry heat shrinkage rates; adding a network at a network nozzle; treating with a first hot box to generate shrinkage; blowing the powder by an air deformation nozzle; heat setting in a second hot box; after being oiled by an oiling yarn guide, the yarn is wound on a bobbin.

In some embodiments, two or more nylon filaments of different dry heat shrinkage are twisted such that the low shrinkage nylon helically wraps the high shrinkage nylon. The twisting aims to wrap nylon filaments with different dry heat shrinkage rates, in the subsequent heat shrinkage process, the nylon with high shrinkage rate shrinks to form a core, and the nylon with low shrinkage rate wraps the nylon filament component with high shrinkage rate in a certain spiral shape.

In some embodiments, the twisted nylon filaments are networked using a network nozzle, wherein the number of nodes per meter of network is 20 to 200. By the design, the combined and twisted nylon filaments form regular network points at intervals, the network points are used for fixing two ends of the nylon filaments with certain lengths relatively, a regulation and control means is provided for subsequent preshrinking, the arching form of the nylon filaments with low thermal shrinkage is controllable, the yarn uniformity is improved, and overlong looped piles formed by subsequent air deformation processing are reduced.

In some embodiments, the networked nylon filaments are overfed into a first hot box for preshrinking, wherein the temperature of the first hot box is 60 ℃ to 250 ℃. Wherein the first hot box temperature is preferably 110 ℃ to 200 ℃. Wherein, overfeeding is carried out by controlling the rotating speed of the wire feeding roller in the pre-shrinking process, the overfeeding amount is 20-200 percent, and the overfeeding amount can be adjusted according to the thermal shrinkage rate of the high-thermal shrinkage chinlon.

Under the action of the pre-shrinking box, the nylon filament begins to shrink, and as the tows contain at least 2 kinds of nylon fibers with different heat shrinkage rates, the lengths of the nylon fibers among network nodes are different, and the nylon fibers with larger lengths and low heat shrinkage rates are bent and arched.

In some embodiments, the pre-shrunk nylon filaments are overfed into an air texturing nozzle for blowing. By the design, the fluffed nylon yarns are blown away under the action of high-speed airflow, so that the fluffiness of the nylon yarns is further improved.

In some embodiments, the nylon filament subjected to air texturing is fed into a second hot box under certain tension for shaping, wherein the temperature of the second hot box is 90-210 ℃, and the shaping time is 1-120 s. By the design, the state of the tows after air deformation is more stable.

On the other hand, the preparation method of the fluffy nylon filament yarn comprises the following steps:

s1, combining and twisting two or more nylon filaments with different dry heat shrinkage rates, wherein the dry heat shrinkage rate difference between the nylon filaments is not less than 10%;

s2, adding a network at the network nozzle;

s3, shrinking through the first hot box treatment;

s4, blowing away through an air deformation nozzle;

s5, performing heat setting through a second hot box;

and S6, oiling by an oiling yarn guide, and winding the yarn on a bobbin.

In some embodiments, the difference in dry heat shrinkage between the nylon filaments is from 20% to 150%

Has the advantages that: compared with the traditional method for manufacturing the nylon filament with a certain fluffy effect by directly carrying out air deformation on the conventional nylon FDY or POY, the fluffy nylon filament obtained by the preparation method has the advantages that the nylon with different heat shrinkage rates is twisted and combined, pre-shrunk after being meshed, and then air deformation processing is carried out to manufacture the fluffy nylon filament, and the manufactured fluffy nylon filament has the advantages of more uniform thread diameter, better fluffy property, less long looped pile and fuller hand feeling of manufactured fabric products.

Drawings

FIG. 1 is a schematic structural diagram of a fluffy nylon filament preparation device of the invention;

wherein: 1. a nylon yarn cylinder; 2. a first wire feed roller; 3. a twister; 4. a network nozzle; 5. a second wire feed roller; 6. a first hot box; 7. a third wire feed roller; 8. an air texturing nozzle; 9. a fourth wire feed roller; 10. a second oven; 11. oiling a thread guide; 12. and (4) winding the bobbin.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawing 1.

As shown in fig. 1, a preparation method of fluffy nylon filament yarn comprises the following steps:

s1, conveying two or more nylon filaments with different dry heat shrinkage rates from a nylon filament barrel 1 to a twister 3 through a first filament feeding roller 2 for twisting, and wrapping the nylon filaments with different dry heat shrinkage rates together to enable the nylon with low shrinkage rate to wrap the nylon with high shrinkage rate in a spiral manner, wherein the dry heat shrinkage rate difference between the nylon filaments is not less than 10%;

s2, adding a net to the twisted nylon filament yarn through a net nozzle 4 to fix two ends of the nylon filament yarn with a certain length relatively, wherein the number of net nodes per meter is 20-200;

s3, conveying the netted nylon filament to a first hot box 6 for treatment through a second filament feeding roller 5, and overfeeding by controlling the rotating speed of the second filament feeding roller 5, wherein the overfeeding amount is 20% -200%, the temperature of the first hot box 6 is 60-250 ℃, the twisted and netted nylon filament contracts in the first hot box 6, and as at least 2 nylon fibers with different heat shrinkage rates are arranged in a tow, the length of the nylon fiber between each network node is different, and the nylon fiber with large length and low heat shrinkage rate bends and arches;

in the thermal shrinkage process, the high-shrinkage chinlon shrinks to form a core, and the low-shrinkage chinlon wraps the high-shrinkage chinlon filament component in a certain spiral shape;

s4, blowing off the fluffed nylon filaments by the pre-contracted nylon filaments through the air deformation nozzle 8 under the action of high-speed airflow by the third filament feeding roller 7, further improving the fluffiness of the nylon filaments, and performing overfeeding by controlling the rotating speed of the third filament feeding roller 7;

s5, sending the nylon filament subjected to air deformation processing into a second hot box 10 for shaping under certain tension by a fourth filament feeding roller 9, so that the state of the filament bundle after air deformation is more stable, the temperature of the hot shaping box is 90-210 ℃, and the shaping time is 1-120S;

and S6, oiling the yarn by the oiling yarn guide 11, and winding the yarn onto a winding drum 12.

Example 1:

1. the nylon raw material A and the raw material B are combined and twisted, the number of 10cm twists is 30, wherein the nylon raw material A is 150D/72f PA6 FDY (the dry heat shrinkage rate is 5%), and the nylon raw material B is 30D/12f PA6 FDY (the dry heat shrinkage rate is 40%);

2. feeding the twisted nylon filaments to a network nozzle for adding a network, wherein the number of network nodes per meter is 100;

3. feeding the netted nylon filament into a first hot box for pre-shrinking at the temperature of 170 ℃ for 5-10s by 40 percent of overfeeding;

4. deforming the pre-shrunk nylon filament by an overfeed 20% air supply deformation nozzle with the air pressure of 0.8 MPa;

5. sending the nylon filament after air deformation to a second hot box for shaping at the temperature of 150 ℃ for 60 s;

6. oiling by an oiling yarn guide, and keeping low tension in the oiling process;

7. and winding the oiled nylon filament into a bobbin.

Compared with the traditional method for manufacturing the nylon filament with a certain fluffy effect by directly carrying out air deformation on the conventional nylon FDY or POY, the fluffy nylon filament obtained by the preparation method provided by the embodiment of the invention is prepared by twisting and combining the nylon with different heat shrinkage rates, pre-shrinking after net netting and then carrying out air deformation processing.

The above is only a preferred mode of the invention, and it should be noted that, for a person skilled in the art, several similar variations and modifications can be made without departing from the inventive concept of the present invention, which should also be considered as within the scope of the present invention.