阅读说明：本技术 一种阻燃耐油污的tpe纱线的生产方法 (Production method of flame-retardant and oil-stain-resistant TPE (thermoplastic elastomer) yarn ) 是由 张斌良 龚明 于 2019-10-12 设计创作，主要内容包括：本发明公开了一种阻燃耐油污的TPE纱线的生产方法,属于高分子弹性体材料加工技术领域。本发明创新地使用了化学反应接枝改性的方法,直接对生产原料进行调整,使得生产出来的TPE纱线具有表面光滑、防水、防油、无毒的性能。(The invention discloses a production method of flame-retardant and oil-stain-resistant TPE (thermoplastic elastomer) yarns, belonging to the technical field of processing of high-molecular elastomer materials. The invention innovatively uses a chemical reaction grafting modification method, and directly adjusts the production raw materials, so that the produced TPE yarn has the properties of smooth surface, water resistance, oil resistance and no toxicity.)

1. The production method of the flame-retardant and oil-stain-resistant TPE yarn is characterized by comprising the following steps of: 1) preparing materials and matching colors: adding the following components in parts by weight into a stirrer for fully mixing, and uniformly mixing to obtain a master batch:

10-20 parts of SEBS (styrene-ethylene-butylene-styrene copolymer),

40-60 Parts of Polypropylene (PP),

10-20 parts of TPU (thermoplastic polyurethane),

5-10 parts of a TPU compatilizer,

10 to 20 portions of paraffin base (straight chain),

30-40 parts of a flame retardant;

2) extruding and preparing filaments: adding the master batch obtained after uniform mixing into an extrusion system of an extruder to plasticize into a uniform molten body, extruding the molten body through a screw continuous extruder head of the extruder, and cooling through a cooling water tank to form TPE yarns;

wherein: the TPU compatilizer in the step 1) is a Maleic Anhydride (MAH) grafted elastomer, the elastomer is prepared from a POP and EVM rubber blend with the blending weight ratio of 1: 1-1: 3, and the flame retardant is aluminum hypophosphite.

2. The method for producing the flame-retardant and oil-resistant TPE yarn as claimed in claim 1, wherein the method for producing the TPU compatibilizer comprises the following steps:

1) firstly, weighing the raw material formula according to the weight part ratio, and then drying the POP and the EVM rubber at the temperature of 70-90 ℃ for 2-5 hours;

2) adding the dried and pretreated POP and EVM rubber into a high-speed mixer, and uniformly mixing, wherein the rotating speed of a paddle of the high-speed mixer is 50-200 rpm (revolutions per minute), and the mixing temperature is 50-60 ℃, so as to ensure that the POP can be uniformly distributed on the EVM rubber;

3) reducing the rotating speed of the high-speed mixer to 30-50 rpm (revolutions per minute), adding a crosslinking agent dissolved by butanone, and uniformly mixing to obtain a mixed material;

4) granulating the mixed material by a double-screw extruder to obtain the TPU compatilizer, wherein the process temperature of a conveying section of the double-screw extruder is 120-160 ℃, the process temperature of a melting shearing section is 160-180 ℃, the process temperature of a compression mixing section is 160-200 ℃, the process temperature of a metering homogenizing section is 170-190 ℃, the length-diameter ratio of a screw is 40-48: 1, and the rotation speed of the screw is 100-200 rpm (revolutions per minute).

3. The production method of the flame-retardant and oil-stain-resistant TPE yarn according to claim 2, characterized in that the drying pretreatment time in the step 1) is 2-4 hours; the mixing time in the step 2) is 2-5 minutes, and the mixing time in the step 3) is 1-2 minutes.

4. The production method of the flame-retardant and oil-stain-resistant TPE yarn according to claim 2 is characterized in that: the weight ratio of POP to EVM rubber blend is 1: 2.

5. The production method of the flame-retardant and oil-stain-resistant TPE yarn according to claim 1, characterized in that the components in the step 1) are as follows in parts by weight: 15 parts of SEBS, 60 parts of polypropylene PP, 20 parts of TPU, 5 parts of TPU compatilizer, 20 parts of paraffin-based white oil and 35 parts of flame retardant.

Technical Field

The invention belongs to the technical field of processing of high polymer elastomer materials, and particularly relates to a production method of flame-retardant and oil-stain-resistant TPE (thermoplastic elastomer) yarns.

Background

The TPE screen cloth is mainly woven by the yarn coated with TPE materials (thermoplastic elastomers), the yarn core body is made of high-strength polyester industrial filaments, the skin layer is coated with anti-aging and anti-ultraviolet radiation materials, the polyester filaments are stretched and coated, and the polyester filaments are drawn and cooled to form a composite wire with smooth, waterproof, oil-proof, non-toxic and cool surfaces. Although the common TPE solves the problem of no halogen, the flame retardant and oil stain resistance are greatly reduced.

In the prior art, when TPE yarns are prepared, the surface smoothness of products is improved by improving the content of polypropylene, and the flame-retardant and oil stain-resistant performances are ensured. In order to solve this problem, there is a method of improving the extrusion speed by adding an external lubricant, but this method has a significant disadvantage that the appearance of the yarn is affected by a long production time since the external lubricant is easily eluted.

Disclosure of Invention

The invention aims to provide a preparation method of flame-retardant and oil-stain-resistant TPE (thermoplastic elastomer) yarns.

The technical scheme of the invention is as follows: a production method of flame-retardant and oil-stain-resistant TPE yarn comprises the following steps: 1) preparing materials and matching colors: adding the following components in parts by weight into a stirrer for fully mixing, and uniformly mixing to obtain a master batch:

10-20 parts of SEBS (styrene-ethylene-butylene-styrene copolymer),

40-60 Parts of Polypropylene (PP),

10-20 parts of TPU (thermoplastic polyurethane),

5-10 parts of a TPU compatilizer,

10 to 20 portions of paraffin base (straight chain),

30-40 parts of a flame retardant;

2) extruding and preparing filaments: adding the master batch obtained after uniform mixing into an extrusion system of an extruder to plasticize into a uniform molten body, extruding the molten body through a screw continuous extruder head of the extruder, and cooling through a cooling water tank to form TPE yarns;

wherein: the TPU compatilizer in the step 1) is a Maleic Anhydride (MAH) grafted elastomer, the elastomer is prepared from a POP and EVM rubber blend with the blending weight ratio of 1: 1-1: 3, and the flame retardant is aluminum hypophosphite.

Further, a method for producing the TPU compatibilizer comprises the following steps:

1) firstly, weighing the raw material formula according to the weight part ratio, and then drying the POP and the EVM rubber at the temperature of 70-90 ℃ for 2-5 hours;

2) adding the dried and pretreated POP and EVM rubber into a high-speed mixer, and uniformly mixing, wherein the rotating speed of a paddle of the high-speed mixer is 50-200 rpm (revolutions per minute), and the mixing temperature is 50-60 ℃, so as to ensure that the POP can be uniformly distributed on the EVM rubber;

3) reducing the rotating speed of the high-speed mixer to 30-50 rpm (revolutions per minute), adding a crosslinking agent dissolved by butanone, and uniformly mixing to obtain a mixed material;

4) granulating the mixed material by a double-screw extruder to obtain the TPU compatilizer, wherein the process temperature of a conveying section of the double-screw extruder is 120-160 ℃, the process temperature of a melting shearing section is 160-180 ℃, the process temperature of a compression mixing section is 160-200 ℃, the process temperature of a metering homogenizing section is 170-190 ℃, the length-diameter ratio of a screw is 40-48: 1, and the rotation speed of the screw is 100-200 rpm (revolutions per minute).

Further, the drying pretreatment time in the step 1) of the production method of the TPU compatilizer is 2-4 hours; the mixing time in the step 2) is 2-5 minutes, and the mixing time in the step 3) is 1-2 minutes.

Further, the weight ratio of the POP to the EVM rubber blend is 1: 2.

Further, the weight parts of the components in the step 1) are as follows: 15 parts of SEBS, 60 parts of polypropylene PP, 20 parts of TPU, 5 parts of TPU compatilizer, 20 parts of paraffin-based white oil and 35 parts of flame retardant.

The invention has the beneficial effects that:

according to the invention, the SEBS is used as a raw material to prepare the TPE yarn, the SEBS is one of TPE elastic plastic elastomers, and the TPE yarn is in a white powder state, but the TPE yarn is difficult to directly process and mold due to high viscosity. In addition, due to the addition of the TPU resin, the flame-retardant char-forming groups are added, and the flame-retardant performance of the TPE yarns is effectively improved.

Detailed Description

The invention will be further illustrated and understood by the following non-limiting examples.

The invention relates to a production method of flame-retardant and oil-stain-resistant TPE (thermoplastic elastomer) yarns, which comprises the following steps:

1) preparing materials and matching colors: adding the following components in parts by weight into a stirrer for fully mixing, and uniformly mixing to obtain a master batch:

10-20 parts of SEBS (styrene-ethylene-butylene-styrene copolymer),

40-60 Parts of Polypropylene (PP),

10-20 parts of TPU (thermoplastic polyurethane),

5-10 parts of a TPU compatilizer,

10-20 parts of paraffin base (straight chain),

30-40 parts of a flame retardant;

2) extruding and preparing filaments: adding the master batch obtained after uniform mixing into an extrusion system of an extruder to plasticize into a uniform molten body, extruding the molten body through a screw continuous extruder head of the extruder, and cooling through a cooling water tank to form TPE yarns;

wherein: the flame retardant is aluminum hypophosphite which can be selected, inorganic aluminum hypophosphite, organic aluminum hypophosphite, ammonium polyphosphate, polyphosphoric piperazine and the like, and organic water resistance defects are detected by practice for a long time, so that the inorganic aluminum hypophosphite is only used;

the TPU compatilizer in the step 1) is a Maleic Anhydride (MAH) grafted elastomer, the elastomer is prepared from a POP and EVM rubber blend with the blending weight ratio of 1: 1-1: 3, and the production method of the TPU compatilizer comprises the following steps:

1) firstly, weighing the raw material formula according to the weight part ratio, and then drying the POP and the EVM rubber at the temperature of 70-90 ℃ for 2-5 hours;

2) adding the dried and pretreated POP and EVM rubber into a high-speed mixer, and uniformly mixing, wherein the rotating speed of a paddle of the high-speed mixer is 50-200 rpm (revolutions per minute), the mixing time is 2-5 minutes, and the mixing temperature is 50-60 ℃ so as to ensure that the POP can be uniformly distributed on the EVM rubber;

3) after the rotating speed of the high-speed mixer is reduced to 30-50 rpm (revolutions per minute), adding a crosslinking agent dissolved by butanone, mixing for 1-2 minutes, and uniformly mixing to obtain a mixed material;

4) granulating the mixed material by a double-screw extruder to obtain the TPU compatilizer, wherein the process temperature of a conveying section of the double-screw extruder is 120-160 ℃, the process temperature of a melting shearing section is 160-180 ℃, the process temperature of a compression mixing section is 160-200 ℃, the process temperature of a metering homogenizing section is 170-190 ℃, the length-diameter ratio of a screw is 40-48: 1, and the rotation speed of the screw is 100-200 rpm (revolutions per minute).

The POP is a polyolefin elastomer POP, the polyolefin plastomer POP is one of products produced by the Dow chemical company by adopting INSITE technology, good bonding strength can be provided for different components, and the low crystallinity of the POP is utilized to reduce the surface adsorption capacity to water molecules;

the present invention will be further described with reference to the following examples.