阅读说明：本技术 一种低导热阻燃涤纶低弹丝的加工工艺 (Processing technology of low-heat-conduction flame-retardant polyester low-stretch yarn ) 是由 徐健毅 于 2020-11-30 设计创作，主要内容包括：本发明公开了一种低导热阻燃涤纶低弹丝的加工工艺,包括以下步骤：步骤1、将磁选后的聚酯切片干燥后送入混料机中与阻燃母粒和色母粒和一起共混均匀；步骤2、将步骤1中混合后的聚酯切片送入双螺杆挤出机中加热熔融后挤入纺丝箱中通过喷丝板纺丝后环吹风冷成型；步骤3、对风冷成型后的聚酯纤维丝表面上油,冷却后形成涤纶长丝；步骤4.将涤纶长丝依次经网络喷嘴、导丝器、第一对牵引罗拉牵神、诱导加热罗拉加热去应力,第二对牵引罗拉牵伸,热箱加热去应力,冷却后引入假捻机假捻,然后卷绕得到阻燃涤纶低弹丝。通过上述方式,本发明能够得到阻燃隔热性能良好的低弹丝,而且制造工艺成熟,纤维性能稳定均一,手感柔软,具有良好的可纺性。(The invention discloses a processing technology of low-heat-conduction flame-retardant polyester low-stretch yarns, which comprises the following steps of: step 1, drying the polyester slices subjected to magnetic separation, and then sending the polyester slices into a mixer to be uniformly blended with the flame-retardant master batch and the master batch; step 2, feeding the polyester chips mixed in the step 1 into a double-screw extruder, heating and melting the polyester chips, extruding the polyester chips into a spinning box, spinning the polyester chips through a spinneret plate, and then performing circular blowing air cooling forming; step 3, oiling the surface of the polyester fiber yarn subjected to air cooling forming, and cooling to form polyester filament yarn; and 4, sequentially passing the polyester filament yarn through a network nozzle, a yarn guide, a first pair of traction rollers and an induction heating roller for heating and destressing, a second pair of traction rollers for drafting, a hot box for heating and destressing, cooling, introducing into a false twisting machine for false twisting, and then winding to obtain the flame-retardant polyester low-stretch yarn. By the mode, the low-stretch yarn with good flame-retardant and heat-insulating properties can be obtained, the manufacturing process is mature, the fiber performance is stable and uniform, the hand feeling is soft, and the spinnability is good.)

1. The processing technology of the low-heat-conduction flame-retardant polyester low-stretch yarn is characterized by comprising the following steps of:

step 1, drying the polyester slices subjected to magnetic separation, and then sending the polyester slices into a mixer to be uniformly blended with the flame-retardant master batch and the master batch;

step 2, feeding the polyester chips mixed in the step 1 into a double-screw extruder, heating and melting the polyester chips, extruding the polyester chips into a spinning box, spinning the polyester chips through a spinneret plate, and then performing circular blowing air cooling forming;

step 3, oiling the surface of the polyester fiber yarn subjected to air cooling forming, and cooling to form polyester filament yarn;

and 4, heating and destressing the polyester filament yarn by a network nozzle, a yarn guide, a first pair of traction rollers and an induction heating roller, drafting by a second pair of traction rollers, heating and destressing by a hot box, cooling, introducing into a false twisting machine for false twisting, and winding to obtain the flame-retardant polyester low-stretch yarn.

2. The processing technology of the low-heat-conduction flame-retardant polyester low stretch yarn as claimed in claim 1, wherein the mixing ratio of the polyester chip to the flame-retardant master batch and the color master batch in the step 1 is as follows: 100: 10-20: 1 to 3.

3. The processing technology of the low-heat-conduction flame-retardant polyester drawn textured yarn as claimed in claim 1, wherein the flame-retardant master batch comprises the following components in parts by mass: 10-20% of tributyl phosphate, 8-10% of magnesium hydroxide, 8-10% of fumed silica, 5-10% of montmorillonite, 1-3% of coupling agent and the balance of amorphous polyester chips.

4. The processing technology of the low thermal conductive flame retardant polyester low stretch yarn as claimed in claim 1, wherein the base material of the color master batch is also amorphous polyester.

5. The processing technology of the low thermal conductivity flame retardant polyester low stretch yarn according to claim 1, wherein the oiling agent used in the oiling in the step 3 is epoxidized soybean oil.

6. The processing technology of the low thermal conductive flame retardant polyester low stretch yarn as claimed in claim 1, wherein 5% of alkyl phosphate is mixed in the epoxidized soybean oil.

7. The processing technology of the low-heat-conduction flame-retardant polyester low-stretch yarn as claimed in claim 1, wherein the draw ratio of the first pair of drawing rollers in the step 4 is 1.1-1.3

The processing technology of the low heat-conduction flame-retardant polyester low stretch yarn as claimed in claim 1, wherein the draw ratio of the second pair of drawing rollers in the step 4 is 1.6-1.8

The processing technology of the low-heat-conduction flame-retardant polyester low-stretch yarn as claimed in claim 1, wherein the temperature of the induction heating roller in the step 4 is 165-185 ℃.

8. The processing technology of the low-heat-conduction flame-retardant polyester low-stretch yarn as claimed in claim 1, wherein the heating temperature of the hot box in the step 4 is 120-130 ℃.

Technical Field

The invention relates to the field of polyester spinning, in particular to a processing technology of low-heat-conduction flame-retardant polyester low-stretch yarns.

Background

The terylene low stretch yarn is a common raw material for knitting or weaving processing, is generally used as a raw material for household textiles such as curtain cloth, sofa cloth, quilt cover, bedspread, suit, shirt and the like, and has a wide application range, so that the technology of the low stretch yarn production in China is mature and the quality is stable at present, but the terylene low stretch yarn in the market has poor flame retardant property although the physical property is stable at present, and cannot meet the requirements of some textiles used in special scenes.

Disclosure of Invention

The invention mainly solves the technical problem of providing a processing technology of the polyester low-stretch yarns, which can improve the flame retardant property of the polyester low-stretch yarns.

In order to solve the technical problems, the invention adopts a technical scheme that: the processing technology of the low-heat-conduction flame-retardant polyester low-stretch yarn comprises the following steps:

step 1, drying the polyester slices subjected to magnetic separation, and then sending the polyester slices into a mixer to be uniformly blended with the flame-retardant master batch and the master batch;

step 2, feeding the polyester chips mixed in the step 1 into a double-screw extruder, heating and melting the polyester chips, extruding the polyester chips into a spinning box, spinning the polyester chips through a spinneret plate, and then performing circular blowing air cooling forming;

step 3, oiling the surface of the polyester fiber yarn subjected to air cooling forming, and cooling to form polyester filament yarn;

and 4, heating and destressing the polyester filament yarn by a network nozzle, a yarn guide, a first pair of traction rollers and an induction heating roller, drafting by a second pair of traction rollers, heating and destressing by a hot box, cooling, introducing into a false twisting machine for false twisting, and winding to obtain the flame-retardant polyester low-stretch yarn.

In a preferred embodiment of the present invention, the mixing ratio of the polyester chip, the flame-retardant masterbatch and the color masterbatch in step 1 is: 100: 10-20: 1 to 3.

In a preferred embodiment of the invention, the flame-retardant master batch comprises the following components in parts by mass: 10-20% of tributyl phosphate, 8-10% of magnesium hydroxide, 8-10% of fumed silica, 5-10% of montmorillonite, 1-3% of coupling agent and the balance of amorphous polyester chips.

In a preferred embodiment of the invention, the base of the masterbatch is also a non-crystalline polyester.

In a preferred embodiment of the present invention, the oiling agent used in the step 3 is epoxidized soybean oil mixed with 5% of alkyl phosphate.

In a preferred embodiment of the present invention, the draw ratio of the first pair of draw rolls in step 4 is 1.1-1.3

In a preferred embodiment of the invention, the draw ratio of the second pair of counter-traction rollers in step 4 is 1.6 · 1.8.

In a preferred embodiment of the present invention, the temperature of the induction heating roller in step 4 is 165-185 ℃, and the temperature of the hot box is 120-130 ℃.

The invention has the beneficial effects that: the technical scheme of the invention is to reform the spinning formula of the polyester filament yarn on the basis of the prior art, directly add the prepared flame retardant during spinning to fundamentally improve the flame retardant property of the polyester low stretch yarn, and simultaneously reduce the resilience of the polyester filament yarn through multiple stretching orientations, thereby finally obtaining the product with good flame retardant and heat insulation properties. The invention has the advantages of mature weaving process, stable and uniform fiber performance, soft hand feeling and good spinning adaptability, and can be applied to various scenes.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.

The embodiment of the invention comprises the following steps:

example 1

The flame-retardant polyester low-stretch yarn is prepared from the following raw materials in percentage by weight:

the mixing ratio of the polyester chip to the flame-retardant master batch to the color master batch is as follows: 100:10: 1 to 3.

The flame-retardant master batch comprises the following components in parts by mass: 20% of tributyl phosphate, 10% of magnesium hydroxide, 10% of fumed silica, 10% of montmorillonite, 3% of coupling agent and the balance of non-crystalline polyester chips, wherein the base material of the color master batch is also non-crystalline polyester.

The flame-retardant master batch adopts the proportion because tributyl phosphate has good flame-retardant effect, magnesium hydroxide and tributyl phosphate have excellent synergistic effect, the flame-retardant property of the tributyl phosphate can be improved, the using amount of the tributyl phosphate can be obviously reduced, fumed silica not only has certain flame-retardant effect, but also has good heat insulation function, the porous adsorption property of montmorillonite can be used as a carrier of a flame retardant to be dispersed in the whole polyester system, the uniformity of the system is improved, local accumulation is prevented, the compatibility between the inorganic material and the polyester can be improved by using a coupling agent, and the montmorillonite can be dispersed more uniformly in processing.

Example 2

The flame-retardant polyester low-stretch yarn is prepared from the following raw materials in percentage by weight:

the mixing ratio of the polyester chip to the flame-retardant master batch to the color master batch is as follows: 100: 20: 1 to 3.

The flame-retardant master batch comprises the following components in parts by mass: 10% of tributyl phosphate, 8% of magnesium hydroxide, 8% of fumed silica, 5% of montmorillonite, 1% of coupling agent and the balance of non-crystalline polyester chips, wherein the base material of the color master batch is also non-crystalline polyester.

The flame-retardant master batch adopts the proportion because tributyl phosphate has good flame-retardant effect, magnesium hydroxide and tributyl phosphate have excellent synergistic effect, the flame-retardant property of the tributyl phosphate can be improved, the using amount of the tributyl phosphate can be obviously reduced, fumed silica not only has certain flame-retardant effect, but also has good heat insulation function, the porous adsorption property of montmorillonite can be used as a carrier of a flame retardant to be dispersed in the whole polyester system, the uniformity of the system is improved, local accumulation is prevented, the compatibility between the inorganic material and the polyester can be improved by using a coupling agent, and the montmorillonite can be dispersed more uniformly in processing.

Example 3

The flame-retardant polyester low-stretch yarn is prepared from the following raw materials in percentage by weight:

the mixing ratio of the polyester chip to the flame-retardant master batch to the color master batch is as follows: 100:15: 1 to 3.

The flame-retardant master batch comprises the following components in parts by mass: 15% of tributyl phosphate, 10% of magnesium hydroxide, 10% of fumed silica, 10% of montmorillonite, 3% of coupling agent and the balance of non-crystalline polyester chips, wherein the base material of the color master batch is also non-crystalline polyester.

The flame-retardant master batch adopts the proportion because tributyl phosphate has good flame-retardant effect, magnesium hydroxide and tributyl phosphate have excellent synergistic effect, the flame-retardant property of the tributyl phosphate can be improved, the using amount of the tributyl phosphate can be obviously reduced, fumed silica not only has certain flame-retardant effect, but also has good heat insulation function, the porous adsorption property of montmorillonite can be used as a carrier of a flame retardant to be dispersed in the whole polyester system, the uniformity of the system is improved, local accumulation is prevented, the compatibility between the inorganic material and the polyester can be improved by using a coupling agent, and the montmorillonite can be dispersed more uniformly in processing.

The flame retardant is processed according to the following processing steps after being sequentially mixed according to the above embodiments 1-3:

step 1, drying the magnetically-separated polyester chips, and then feeding the polyester chips into a mixer to be uniformly mixed with flame-retardant master batches and color master batches according to the proportion of the process requirement;

step 2, feeding the polyester chips mixed in the step 1 into a double-screw extruder, heating and melting the polyester chips, extruding the polyester chips into a spinning box, spinning the polyester chips through a spinneret plate, and then performing circular blowing air cooling forming;

step 3, mixing epoxidized soybean oil with alkyl phosphate on the surface of the polyester fiber yarn subjected to air cooling forming, cooling the polyester fiber yarn to form polyester filament yarn, wherein the alkyl phosphate is added into the epoxidized soybean oil to further reduce the combustion characteristic of the surface of the polyester filament yarn;

and 4, heating the polyester filament yarn to 165-185% through a network nozzle, a yarn guide, a first pair of traction rollers and an induction heating roller in sequence, drafting through a second pair of traction rollers, heating through a hot box (120-140%), cooling, introducing into a false twister for false twisting, and winding to obtain the flame-retardant polyester low-stretch yarn.

The stretching ratio of the first pair of traction rollers in the step 4 is 1.1-1.3, the stretching ratio of the second pair of traction rollers in the step 4 is 1.6-1.8, the surface temperature of the induction heating roller in the step 4 is 140-150 ℃, and the heating temperature of the hot box is 120-130 ℃. The reason why the second stretch ratio is larger than the first stretch ratio is that the first stretch is cold stretch, the stretch breaking is easily caused when the stretch ratio is too large, the temperature is relatively high during the second stretch after the internal stress is eliminated by heating, so the stretch ratio is large, after the internal stress is eliminated by twice stretches, the fibers in the polyester yarn are forced to be oriented along the stretch direction, the overall elasticity is naturally reduced, and the processing standard of the low-elasticity yarn is reached. The reason that the surface temperature of the induction heating roller is higher is that the winding time of the polyester filament on the roller is shorter, the actual temperature is lower, and the stress elimination degree is lower than that of the heating box.

The actual measurement results of the flame retardant properties of the above examples 1 to 3 are shown in the following table:

the above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.