阅读说明：本技术 一种peek/pps皮芯复合单丝、制备方法及用途 (Peek/pps sheath-core composite monofilament, preparation method and application ) 是由 钱琦渊 汪一飞 邹叶飞 丁天 于 2021-10-13 设计创作，主要内容包括：本发明提供的一种peek/pps皮芯复合单丝,涉及复合单丝技术领域,包括材质为聚苯硫醚的芯层和材质为聚醚醚酮的皮层；所述皮层包裹所述芯层。本发明提供的peek/pps皮芯符合单丝具有耐高温、阻燃性好、耐辐射性,能够在285～315℃或者极限氧指数≥35％的环境下长期使用,适合作为湿态、液态、干固态、气态的综合工装条件下的单丝过滤网布的材料；尤其是作为高温环境下的单丝网布过滤网布材料,可以在高温下保持均匀稳定,保证长效的过滤精度。(The invention provides a peek/pps sheath-core composite monofilament, which relates to the technical field of composite monofilaments and comprises a core layer made of polyphenylene sulfide and a sheath layer made of polyether-ether-ketone; the skin layer wraps the core layer. The peek/pps sheath-core provided by the invention meets the requirements of high temperature resistance, good flame retardance and radiation resistance of monofilaments, can be used for a long time in an environment with the temperature of 285-315 ℃ or the limiting oxygen index of more than or equal to 35%, and is suitable for being used as a material of monofilament filter screen cloth under the comprehensive tool conditions of wet state, liquid state, dry solid state and gas state; especially, the single-wire cloth filter screen cloth material can be kept uniform and stable at high temperature and ensure long-acting filter precision.)

1. The peek/pps sheath-core composite monofilament is characterized by comprising a core layer made of polyphenylene sulfide and a sheath layer made of polyether-ether-ketone; the skin layer wraps the core layer.

2. A method of making the peek/pps sheath-core composite monofilament of claim 1, comprising the steps of:

melting and extruding the polyphenylene sulfide material through a screw extruder A to prepare a uniform polyphenylene sulfide melt, and melting and extruding the polyether-ether-ketone material through a screw extruder B to prepare a uniform polyether-ether-ketone melt;

respectively conveying the polyphenylene sulfide melt and the polyether-ether-ketone melt to a composite spinning manifold, and respectively distributing the polyphenylene sulfide melt and the polyether-ether-ketone melt to a composite spinning assembly;

extruding two components in the composite spinning assembly, and performing pre-stretching treatment to obtain pre-drawn yarns;

and (3) performing a drafting and shaping process on the pre-drawn yarns through a heating zone to carry out shaping processing to obtain the peek/pps sheath-core composite monofilament.

3. The method for preparing the peek/pps sheath-core composite monofilament as claimed in claim 2, wherein the melting temperature of the polyphenylene sulfide material is 315-365 ℃; the melting temperature of the polyether-ether-ketone is 365-435 ℃.

4. The method for preparing the peek/pps sheath-core composite monofilament as claimed in claim 2, wherein the temperature in the composite spinning box is 335-425 ℃.

5. The method of preparing a peek/pps sheath-core composite monofilament as claimed in claim 2, wherein the temperature of the heating zone is 285-365 ℃.

6. The method for preparing the peek/pps sheath-core composite monofilament as claimed in claim 2, wherein the temperature of a hot plate in the drawing and sizing process is 280-310 ℃, and the temperature of the hot plate is 305-385 ℃; the drawing ratio is 3.5-5.5, and the drawing speed is 200-350 m/min.

7. The method of preparing a peek/pps sheath-core composite monofilament as claimed in claim 2, wherein the spinning speed of the pre-drawn yarn is 560 to 1250 m/min.

8. Use of the peek/pps sheath-core composite monofilament according to claim 1 in a monofilament filter screen cloth material in an environment with a temperature of 285-315 ℃ or a limiting oxygen index of greater than or equal to 35%.

Technical Field

The invention relates to the technical field of composite monofilaments, in particular to a peek/pps sheath-core composite monofilament, a preparation method and application.

Background

As a composite fiber material, the composite monofilament has the advantages of smooth surface, gorgeous color, water resistance, oil resistance, ultraviolet resistance, flame retardance, coolness, wear resistance, long service life and the like, so that the composite monofilament is widely applied to various products such as outdoor leisure articles, furniture decoration, beach chairs, hammocks, curtains, automobile cushion foot pads, door mats, decoration articles, filter screen cloth framework materials and the like.

However, the existing composite monofilament loses stability when used in a high-temperature environment for a long time, so that the single-wire mesh cloth using the composite monofilament as a framework material has poor filtering precision and cannot play a long-acting filtering role.

Disclosure of Invention

Aiming at the technical problems, the invention provides the peek/pps sheath-core composite monofilament, the preparation method and the application, and the problems of low stability and incapability of being used in a high-temperature environment for a long time in the prior art are effectively solved.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the invention provides a peek/pps sheath-core composite monofilament, which comprises a core layer made of polyphenylene sulfide and a sheath layer made of polyether-ether-ketone; the skin layer wraps the core layer.

The invention provides a preparation method for preparing the peek/pps sheath-core composite monofilament as described in claim 1, which comprises the following steps:

melting and extruding the polyphenylene sulfide material through a screw extruder A to prepare a uniform polyphenylene sulfide melt, and melting and extruding the polyether-ether-ketone material through a screw extruder B to prepare a uniform polyether-ether-ketone melt;

respectively conveying the polyphenylene sulfide melt and the polyether-ether-ketone melt to a composite spinning manifold, and respectively distributing the polyphenylene sulfide melt and the polyether-ether-ketone melt to a composite spinning assembly;

extruding two components in the composite spinning assembly, and performing pre-stretching treatment to obtain pre-drawn yarns;

and (3) performing a drafting and shaping process on the pre-drawn yarns through a heating zone to carry out shaping processing to obtain the peek/pps sheath-core composite monofilament.

According to the preparation method of the peek/pps sheath-core composite monofilament, the melting temperature of the polyphenylene sulfide material is 315-365 ℃; the melting temperature of the polyether-ether-ketone is 365-435 ℃.

The preparation method of the peek/pps sheath-core composite monofilament provided by the invention has the advantage that the temperature in the composite spinning box body is 335-425 ℃.

The preparation method of the peek/pps sheath-core composite monofilament provided by the invention has the advantage that the temperature of the heating zone is 285-365 ℃.

According to the preparation method of the peek/pps sheath-core composite monofilament, the temperature of a hot plate in a drafting and shaping process is 280-310 ℃, and the temperature of a hot plate is 305-385 ℃; the drawing ratio is 3.5-5.5, and the drawing speed is 200-350 m/min.

According to the preparation method of the peek/pps sheath-core composite monofilament, the spinning speed of the pre-drawn yarn is 560-1250 m/min.

The invention provides application of the peek/pps sheath-core composite monofilament as defined in claim 1 to a monofilament filter screen cloth material in an environment with the temperature of 285-315 ℃ or the limiting oxygen index of more than or equal to 35%.

The technical scheme has the following advantages or beneficial effects:

the invention provides a peek/pps sheath-core composite monofilament, which comprises a core layer made of polyphenylene sulfide and a sheath layer made of polyether-ether-ketone; the skin layer wraps the core layer. The peek/pps sheath-core provided by the invention meets the requirements of high temperature resistance, good flame retardance and radiation resistance of monofilaments, can be used for a long time in an environment with the temperature of 285-315 ℃ or the limiting oxygen index of more than or equal to 35%, and is suitable for being used as a material of monofilament filter screen cloth under the comprehensive tool conditions of wet state, liquid state, dry solid state and gas state; especially, the single-wire cloth filter screen cloth material can be kept uniform and stable at high temperature and ensure long-acting filter precision.

Detailed Description

The technical solutions in the embodiments of the present invention are 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. Thus, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the invention without making creative efforts, belong to the protection scope of the invention.

Example 1:

the invention provides a peek/pps sheath-core composite monofilament, which comprises a core layer made of polyphenylene sulfide and a sheath layer made of polyether-ether-ketone; the skin layer wraps the core layer. The peek/pps sheath-core provided by the invention meets the requirements of high temperature resistance, good flame retardance and radiation resistance of monofilaments, can be used for a long time in an environment with the temperature of 285-315 ℃ or the limiting oxygen index of more than or equal to 35%, and is suitable for being used as a material of monofilament filter screen cloth under the comprehensive tool conditions of wet state, liquid state, dry solid state and gas state; especially, the single-wire cloth filter screen cloth material can be kept uniform and stable at high temperature and ensure long-acting filter precision.

Example 2:

the method for preparing the peek/pps sheath-core composite monofilament provided in the embodiment 1 comprises the following steps:

s101: melting and extruding the polyphenylene sulfide material through a screw extruder A to prepare a uniform polyphenylene sulfide melt, and melting and extruding the polyether-ether-ketone material through a screw extruder B to prepare a uniform polyether-ether-ketone melt; the melting temperature of the polyphenylene sulfide material is 315-365 ℃; the melting temperature of the polyether-ether-ketone is 365-435 ℃;

s102: conveying the polyphenylene sulfide melt and the polyether-ether-ketone melt into a composite spinning box respectively, wherein the temperature in the composite spinning box is 335-425 ℃, and distributing the polyphenylene sulfide melt and the polyether-ether-ketone melt into composite spinning components respectively;

s103: extruding two components in the composite spinning assembly, and performing pre-stretching treatment to obtain pre-drawn yarns, wherein the spinning speed of the pre-drawn yarns is 560-1250 m/min;

s104: the pre-drawn yarns are subjected to a drafting and shaping process through a heating zone at 285-365 ℃ to obtain peek/pps sheath-core composite monofilaments; the temperature of a hot plate in the drafting and shaping process is 280-310 ℃, and the temperature of a hot plate is 305-385 ℃; the drawing ratio is 3.5-5.5, and the drawing speed is 200-350 m/min.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification or other related technical fields can be directly or indirectly applied thereto, and the same shall be included in the scope of the present invention.