阅读说明：本技术 阻燃涤纶化纤 (Flame-retardant polyester chemical fiber ) 是由 徐育权 于 2018-07-09 设计创作，主要内容包括：本发明公开了一种阻燃涤纶化纤,其原料包括有机磷和PET切片,其加工步骤包括：(1)制备母粒：先将有机磷和PET切片放入高速搅拌机中搅拌,搅拌好的有机磷和PET切片混合物放入造粒机中进行造粒,再对造粒进行分切得到母粒,(2)生产化纤流程：制造好的母粒进行烘干后进入螺杆挤压,在烘干机和螺杆挤压机之间设置有定量加料装置,所述PET切片从烘干机直接进入螺杆挤压机中,所述母粒从定量加料装置进入螺杆挤压机中,此时母粒与PET切片在螺旋挤压机中混合,纺丝,得到化纤成品,之后分切,本发明的阻燃涤纶化纤的氧指数可以达32以上,具有很好的阻燃性能,同时降低成本。(The invention discloses a flame-retardant polyester chemical fiber, which comprises the following raw materials of organic phosphorus and PET slices, and comprises the following processing steps: (1) preparing master batch: firstly, putting organic phosphorus and PET slices into a high-speed stirrer for stirring, putting a stirred mixture of the organic phosphorus and the PET slices into a granulator for granulation, and then slitting the granulation to obtain master batches, (2) producing chemical fibers: the prepared master batch is dried and then enters a screw to be extruded, a quantitative feeding device is arranged between a dryer and a screw extruder, the PET slices directly enter the screw extruder from the dryer, the master batch enters the screw extruder from the quantitative feeding device, the master batch and the PET slices are mixed and spun in the screw extruder to obtain a chemical fiber finished product, and then the chemical fiber finished product is cut.)

1. The flame-retardant polyester chemical fiber is characterized in that: the raw materials comprise organic phosphorus and PET slices.

2. The preparation method of the flame-retardant polyester chemical fiber is characterized by comprising the following steps: the method comprises the following steps:

(1) preparing master batch: firstly, putting organic phosphorus and PET slices into a high-speed stirrer for stirring, putting a stirred mixture of the organic phosphorus and the PET slices into a granulator for granulation, and then cutting the granulation to obtain master batches;

(2) chemical fiber production: the manufactured master batch is dried and then enters a screw extruder for extrusion, a quantitative feeding device is arranged between the dryer and the screw extruder, the PET slices directly enter the screw extruder from the dryer, the master batch enters the screw extruder from the quantitative feeding device, the master batch and the PET slices are mixed in the screw extruder at the moment, and the chemical fiber finished product is obtained through spinning, water cooling, drying, sizing and slitting.

3. The method for preparing flame retardant terylene chemical fiber according to claim 2, characterized in that: the master batch comprises the following components in percentage by mass, wherein the mass fraction of organic phosphorus is 40-60%, and the mass fraction of the PET slice is 40-60%.

4. The method for preparing flame retardant polyester chemical fiber according to claim 3, characterized in that: the master batch comprises the following components in percentage by mass, wherein the percentage by mass of organic phosphorus is 50%, and the percentage by mass of the PET slices is 50%.

5. The flame retardant polyester chemical fiber according to claim 1, characterized in that: the melting point of the organic phosphorus is 230-250 ℃.

6. The method for preparing flame retardant terylene chemical fiber according to claim 2, characterized in that: the raw materials in the step (2) comprise, by mass, 2-96% of master batch and 4-98% of PET slices.

7. The method for preparing flame-retardant polyester chemical fiber according to claim 2, wherein the raw materials in the step (2) comprise, by mass, 5% of master batch and 95% of PET chips.

8. The method for preparing flame retardant terylene chemical fiber according to claim 2, characterized in that: in the step (1), the granulator adopts double screws, the granulation temperature is between 250 ℃ and 255 ℃, and the size of the granulated and cut particles is consistent with that of the PET slices.

9. The method for preparing flame retardant terylene chemical fiber according to claim 2, characterized in that: the drying temperature of the dryer in the step (2) is 150-180 ℃, and the drying time is 4 hours.

10. The method for preparing flame retardant terylene chemical fiber according to claim 2, characterized in that: and (3) drying in the step (2), and then feeding into a screw extruder, wherein the screw temperature is 265-270 ℃.

Technical Field

The invention relates to the field of chemical fibers, in particular to flame-retardant polyester chemical fibers.

Background

The flame-retardant chemical fiber refers to a fiber which has a material or has a flame spread obviously delayed after being treated. With the progress of society, the living standard of people is increasingly improved, and the demand of flame retardant chemical fibers is more and more. The research on the flame-retardant chemical fibers is also a new direction for preventing and treating fire in all countries in the world. The most advanced companies for flame-retardant chemical fibers at present comprise German Kelaine and Chinese petrifaction, but the flame-retardant polyester chemical fibers produced by the two companies are both composite, and the original flame-retardant polyester chemical fibers can only be made by the petrifaction company, but the cost is high, the process is complex, the flame-retardant polyester chemical fibers manufactured by the petrifaction company are manufactured in batches, sometimes, the flexibility is not available, the requirements of different customers cannot be met, and the cost is high under the same flame-retardant effect.

Disclosure of Invention

Aiming at the problems in the background art, the invention provides flame-retardant polyester chemical fiber, and aims to provide flame-retardant polyester chemical fiber, which has an oxygen index of more than 32, a good flame-retardant effect and reduced cost.

In order to achieve the purpose, the invention provides the following technical scheme: the flame-retardant polyester chemical fiber comprises raw materials of organic phosphorus and PET slices.

As a preferred technical scheme of the invention, the melting point of the organic phosphorus is 230-250 ℃.

The method for preparing the flame-retardant polyester chemical fiber comprises the following steps:

(1) preparing master batch: firstly, putting organic phosphorus and PET slices into a high-speed stirrer for stirring, putting a stirred mixture of the organic phosphorus and the PET slices into a granulator for granulation, and then cutting the granulation to obtain master batches.

(2) The chemical fiber production process comprises the following steps: the manufactured master batch is dried and then enters a screw rod to be extruded, a quantitative feeding device is arranged between a dryer and a screw rod extruder, the PET slices directly enter the screw rod extruder from the dryer, the master batch enters the screw rod extruder from the quantitative feeding device, and the master batch and the PET slices are mixed in the screw rod extruder at the moment to be spun to obtain a chemical fiber finished product and then are cut.

According to a preferable technical scheme, the mass fraction of the organic phosphorus in the master batch is between 40 and 60 percent, and the mass fraction of the PET slices is between 40 and 60 percent.

According to a preferable technical scheme of the invention, the mass fraction of the organic phosphorus in the master batch is 50%, and the mass fraction of the PET chips is 50%.

As a preferable technical scheme of the invention, the raw materials in the step (2) comprise, by mass, 2-96% of master batch and 4-98% of PET.

As a preferable technical scheme of the present invention, the raw materials in the step (2) are, by mass, 5% of the master batch, and 95% of the PET.

As a preferable technical scheme of the invention, the granulator in the step (1) adopts double screws, the granulation temperature is between 250 ℃ and 255 ℃, and the particle size of the granulation and cutting is consistent with that of the PET slices.

As a preferable technical scheme of the invention, the drying temperature of the dryer in the step (2) is 150-180 ℃, and the drying time is 4 hours.

As a preferred technical scheme of the invention, the dried product in the step (2) enters a screw extruder, and the screw temperature is 265-270 ℃.

Compared with the prior art, the invention has the beneficial effects that: at present, the manufacturing method of flame-retardant polyester chemical fibers prepared by crude petrochemical companies is changed in an adding mode, organic phosphorus and PET slices are mixed to prepare master batches, a set of feeding device with proper amount is added on a chemical fiber manufacturing production line, and the flame-retardant master batches are added in the mode. The flame-retardant effect can be achieved by the production in the way, and more and less flame-retardant effects can be added according to the requirements of customers. In this way it has three major advantages: compared with the flame-retardant slice of a petrochemical company, the flame-retardant slice has the same flame-retardant effect and the cost is reduced by about 15 percent. The flame-retardant slice has the advantages of flexibility, simple process flow and capability of being processed into the oxygen index meeting the requirement according to the requirement of a customer, and overcomes the defect that the oxygen index of the conventional flame-retardant slice cannot be changed.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.