阅读说明：本技术 低收缩率二次定型无纺布制备工艺 (Preparation process of low-shrinkage secondary setting non-woven fabric ) 是由 花荣继 于 2021-08-09 设计创作，主要内容包括：本发明提供低收缩率二次定型无纺布制备工艺,涉及无纺布技术领域,所述低收缩率二次定型无纺布是由聚丙烯颗粒、钛白粉、色母颗粒、偶联剂和分散剂构成。本发明,通过对聚丙烯颗粒、钛白粉、色母颗粒、偶联剂和分散剂进行混合搅拌,然后对原料进行加热形成熔体并进行过滤,形成过滤熔体,然通过气流牵伸将滤熔体均匀喷涂在成网输送带上,并对形成的纤维网进行光辊热轧,使纤维网得到第一次定型,形成平整网布,然后再次将过滤熔体均匀喷涂在平整网布上,并对形成的复合网布进行花辊热轧处理,使复合网布得到二次定型,使成型布有更高的强度,从而得到低收缩率的成品无纺布,以便达到较好的使用效果。(The invention provides a preparation process of a low-shrinkage secondary forming non-woven fabric, and relates to the technical field of non-woven fabrics. According to the invention, polypropylene particles, titanium dioxide, color master particles, a coupling agent and a dispersing agent are mixed and stirred, then raw materials are heated to form a melt and are filtered to form a filter melt, the filter melt is uniformly sprayed on a net-forming conveyor belt through air draft, and smooth roll hot rolling is carried out on a formed fiber net, so that the fiber net is shaped for the first time to form a flat net cloth, then the filter melt is uniformly sprayed on the flat net cloth again, and the formed composite net cloth is subjected to roller hot rolling treatment, so that the composite net cloth is shaped for the second time, and the formed net cloth has higher strength, thereby obtaining a finished non-woven fabric with low shrinkage rate, and achieving a better using effect.)

1. The low-shrinkage secondary setting non-woven fabric is characterized in that: the low-shrinkage secondary sizing non-woven fabric is composed of polypropylene particles, titanium dioxide, color master particles, a coupling agent and a dispersing agent, and the components of the materials are as follows: 84-92% of polypropylene particles, 4-8% of titanium dioxide, 0.4-1.5% of color master batch particles, 1.5-4% of coupling agent and 1.2-3% of dispersing agent.

2. The low shrinkage secondary-set nonwoven fabric of claim 1, wherein: the polypropylene particles are colorless particles, and the diameter of the particles is less than 8 mm.

3. The low shrinkage secondary-set nonwoven fabric of claim 1, wherein: the coupling agent is one or a mixture of more of dodecafluoroheptyl methacrylate, butyl titanate, hexafluorobutyl methacrylate and isopropyl titanate in any proportion.

4. The low shrinkage secondary-set nonwoven fabric of claim 1, wherein: the dispersing agent is one or a mixture of more than one of methyl amyl alcohol, fatty acid polyglycol ester, triethyl hexyl phosphoric acid and polyacrylamide in any proportion.

5. The low shrinkage secondary-set nonwoven fabric of claim 1, wherein: the components of each material are as follows: 89% of polypropylene particles, 6% of titanium dioxide, 1.4% of color master batch particles, 2.2% of coupling agent and 1.4% of dispersing agent.

6. The low shrinkage secondary-set nonwoven fabric of claim 1, wherein: the components of each material are as follows: 87% of polypropylene particles, 7% of titanium dioxide, 1.2% of color master batch particles, 2.4% of coupling agent and 2.4% of dispersing agent.

7. The low shrinkage secondary-set nonwoven fabric of claim 1, wherein: the components of each material are as follows: 84% of polypropylene particles, 8% of titanium dioxide, 1.1% of color master batch particles, 3.9% of coupling agent and 3% of dispersing agent.

8. The preparation process of the low-shrinkage secondary forming non-woven fabric according to claim 1, characterized in that: the method comprises the following steps:

s1: putting the polypropylene particles, the titanium dioxide, the color master particles, the coupling agent and the dispersing agent into a stirrer together, stirring at the stirring speed of 120-;

s2: pouring the mixture obtained in the step S1 into a screw extruder, and carrying out hot melting on the mixture by the screw extruder at the heating temperature of 180 ℃ and 200 ℃ to form a melt;

s3: introducing the melt obtained in the step S2 into a filter, and filtering and removing impurities in the melt to obtain a filtered melt;

s4: introducing the filtered melt obtained in the step S3 into a spinning machine, drafting by air flow, wherein the air pressure of the air flow is 4-6Kpa, the air temperature is 50-60 ℃, and spraying the filtered melt from a spinning nozzle to be uniformly sprayed on a web forming conveyor belt to form a fiber web;

s5: hot rolling the fiber net on the conveying belt in the S4 by using a smooth roller, wherein the hot rolling temperature is 145-152 ℃, and the hot rolling pressure is 75-80daN/cm, so that a smooth net cloth is formed;

s6: through air flow drafting, the air pressure of air flow is 4-6Kpa, the air flow temperature is 50-60 ℃, the filtering melt is sprayed out from a spinning nozzle and evenly sprayed on the smooth screen cloth in S5, and a composite screen cloth is formed;

s7: hot rolling the composite mesh cloth in the S6 by using a flower roller, wherein the hot rolling temperature is 155-164 ℃, and the hot rolling pressure is 85-95daN/cm, so as to obtain the forming cloth;

s8: and (4) carrying out air cooling treatment on the formed cloth in the S7, wherein the air cooling temperature is 18-22 ℃, after the formed cloth is cooled to room temperature, carrying out rolling treatment on the formed cloth, and cutting the rolled formed cloth after rolling, thereby obtaining the finished low-shrinkage secondary formed non-woven fabric.

Technical Field

The invention relates to the technical field of non-woven fabrics, in particular to a preparation process of a low-shrinkage secondary forming non-woven fabric.

Background

Present non-woven fabrics is in the course of working, and the shaping becomes cloth through a hot rolling mostly, and this leads to off-the-shelf non-woven fabrics in the use, and the phenomenon of dispersion can appear easily in the fibre on non-woven fabrics surface, and then influences the holistic shrinkage factor of non-woven fabrics, and then influences the result of use of whole non-woven fabrics.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a preparation process of a low-shrinkage secondary forming non-woven fabric.

In order to achieve the purpose, the invention adopts the following technical scheme: the low-shrinkage secondary forming non-woven fabric is composed of polypropylene particles, titanium dioxide, color master particles, a coupling agent and a dispersing agent, and the components of the materials are as follows: 84-92% of polypropylene particles, 4-8% of titanium dioxide, 0.4-1.5% of color master batch particles, 1.5-4% of coupling agent and 1.2-3% of dispersing agent.

In order to adjust the color conveniently, the invention improves that the polypropylene particles are colorless particles, and the diameter of the particles is less than 8 mm.

In order to achieve better finished product effect, the invention improves that the coupling agent is one or a mixture of more than one of dodecafluoroheptyl methacrylate, butyl titanate, hexafluorobutyl methacrylate and isopropyl titanate in any proportion.

In order to uniformly disperse the raw materials, the improvement of the invention is that the dispersant is one or a mixture of more of methyl amyl alcohol, fatty acid polyglycol ester, triethyl hexyl phosphoric acid and polyacrylamide in any proportion.

In order to achieve different effects, the invention has the improvement that the components of each material are as follows: 89% of polypropylene particles, 6% of titanium dioxide, 1.4% of color master batch particles, 2.2% of coupling agent and 1.4% of dispersing agent.

In order to achieve different effects, the invention has the improvement that the components of each material are as follows: 87% of polypropylene particles, 7% of titanium dioxide, 1.2% of color master batch particles, 2.4% of coupling agent and 2.4% of dispersing agent.

In order to achieve different effects, the invention has the improvement that the components of each material are as follows: 84% of polypropylene particles, 8% of titanium dioxide, 1.1% of color master batch particles, 3.9% of coupling agent and 3% of dispersing agent.

The preparation process of the low-shrinkage secondary forming non-woven fabric comprises the following steps:

s1: putting the polypropylene particles, the titanium dioxide, the color master particles, the coupling agent and the dispersing agent into a stirrer together, stirring at the stirring speed of 120-;

s2: pouring the mixture obtained in the step S1 into a screw extruder, and carrying out hot melting on the mixture by the screw extruder at the heating temperature of 180 ℃ and 200 ℃ to form a melt;

s3: introducing the melt obtained in the step S2 into a filter, and filtering and removing impurities in the melt to obtain a filtered melt;

s4: introducing the filtered melt obtained in the step S3 into a spinning machine, drafting by air flow, wherein the air pressure of the air flow is 4-6Kpa, the air temperature is 50-60 ℃, and spraying the filtered melt from a spinning nozzle to be uniformly sprayed on a web forming conveyor belt to form a fiber web;

s5: hot rolling the fiber net on the conveying belt in the S4 by using a smooth roller, wherein the hot rolling temperature is 145-152 ℃, and the hot rolling pressure is 75-80daN/cm, so that a smooth net cloth is formed;

s6: through air flow drafting, the air pressure of air flow is 4-6Kpa, the air flow temperature is 50-60 ℃, the filtering melt is sprayed out from a spinning nozzle and evenly sprayed on the smooth screen cloth in S5, and a composite screen cloth is formed;

s7: hot rolling the composite mesh cloth in the S6 by using a flower roller, wherein the hot rolling temperature is 155-164 ℃, and the hot rolling pressure is 85-95daN/cm, so as to obtain the forming cloth;

s8: and (4) carrying out air cooling treatment on the formed cloth in the S7, wherein the air cooling temperature is 18-22 ℃, after the formed cloth is cooled to room temperature, carrying out rolling treatment on the formed cloth, and cutting the rolled formed cloth after rolling, thereby obtaining the finished low-shrinkage secondary formed non-woven fabric.

Compared with the prior art, the invention has the advantages and positive effects that,

according to the invention, polypropylene particles, titanium dioxide, color master particles, a coupling agent and a dispersing agent are mixed and stirred, then raw materials are heated to form a melt and are filtered to form a filtered melt, the filtered melt is uniformly sprayed on a net-forming conveyor belt through air drafting to form a fiber net, the fiber net is subjected to smooth roll hot rolling to obtain first shaping of the fiber net to form a flat net cloth, then the filtered melt is uniformly sprayed on the flat net cloth again to form a composite net cloth, and the composite net cloth is subjected to roller hot rolling to obtain second shaping, so that the formed net cloth has higher strength, the surface fibers of the finished non-woven cloth are prevented from being dispersed in the using process, and the finished non-woven cloth with low shrinkage is obtained, thereby achieving better using effect.

Drawings

FIG. 1 is a flow chart of a preparation process of a low-shrinkage secondary-setting non-woven fabric provided by the invention.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.

Referring to fig. 1, the present invention provides a low shrinkage secondary setting nonwoven fabric, which is composed of polypropylene particles, titanium dioxide, color master particles, a coupling agent and a dispersing agent, and the components of each material are as follows: 84-92% of polypropylene particles, 4-8% of titanium dioxide, 0.4-1.5% of color master batch particles, 1.5-4% of coupling agent and 1.2-3% of dispersing agent.

The polypropylene particles are colorless particles and the diameter of the particles is less than 8 mm.

The coupling agent is one or a mixture of more than one of methacrylic acid dodecafluoroheptyl ester, butyl titanate, methacrylic acid hexafluorobutyl ester and titanium isopropyl ester in any proportion.

The dispersing agent is one or a mixture of more of methyl amyl alcohol, fatty acid polyglycol ester, triethyl hexyl phosphoric acid and polyacrylamide in any proportion.

Example one

The components of each material are as follows: 89% of polypropylene particles, 6% of titanium dioxide, 1.4% of color master batch particles, 2.2% of coupling agent and 1.4% of dispersing agent.

The preparation process of the low-shrinkage secondary forming non-woven fabric comprises the following steps:

s1: putting the polypropylene particles, the titanium dioxide, the color master particles, the coupling agent and the dispersing agent into a stirrer together, stirring at the stirring speed of 120 revolutions per minute for 40 minutes to obtain a mixture after stirring;

s2: pouring the mixture obtained in the step S1 into a screw extruder, and carrying out hot melting on the mixture by the screw extruder at the heating temperature of 180 ℃ to form a melt;

s3: introducing the melt obtained in the step S2 into a filter, and filtering and removing impurities in the melt to obtain a filtered melt;

s4: introducing the filtered melt obtained in the step S3 into a spinning machine, and spraying the filtered melt out of a spinning nozzle through air flow drafting, wherein the air flow pressure is 4Kpa and the air flow temperature is 50 ℃, and uniformly spraying the filtered melt on a web forming conveyor belt to form a fiber web;

s5: hot rolling the fiber web on the conveyor belt in the S4 by using a smooth roll, wherein the hot rolling temperature is 148 ℃ and the hot rolling pressure is 80daN/cm, so that a smooth mesh fabric is formed;

s6: spraying the filtering melt out of a spinning nozzle by air flow drafting with the air flow pressure of 4Kpa and the air flow temperature of 50 ℃, and uniformly spraying the filtering melt on the smooth screen cloth in S5 to form a composite screen cloth;

s7: hot rolling the composite mesh cloth in the S6 by using a patterned roller, wherein the hot rolling temperature is 157 ℃, and the hot rolling pressure is 90daN/cm, so as to obtain a formed cloth;

s8: and (4) carrying out air cooling treatment on the formed cloth in the S7, wherein the air cooling temperature is 20 ℃, after the formed cloth is cooled to room temperature, carrying out rolling treatment on the formed cloth, and cutting the rolled formed cloth after rolling, thereby obtaining the finished product of the secondary forming non-woven fabric with low shrinkage rate.

Example two

The components of each material are as follows: 87% of polypropylene particles, 7% of titanium dioxide, 1.2% of color master batch particles, 2.4% of coupling agent and 2.4% of dispersing agent.

The preparation process of the low-shrinkage secondary forming non-woven fabric comprises the following steps:

s1: putting the polypropylene particles, the titanium dioxide, the color master particles, the coupling agent and the dispersing agent into a stirrer together, stirring at the stirring speed of 180 revolutions per minute for 30 minutes, and obtaining a mixture after stirring;

s2: pouring the mixture obtained in the step S1 into a screw extruder, and carrying out hot melting on the mixture by the screw extruder at the heating temperature of 184 ℃ to form a melt;

s3: introducing the melt obtained in the step S2 into a filter, and filtering and removing impurities in the melt to obtain a filtered melt;

s4: introducing the filtered melt obtained in the step S3 into a spinning machine, and spraying the filtered melt out of a spinning nozzle through air flow drafting with the air flow pressure of 5Kpa and the air flow temperature of 50 ℃ to form a fiber web;

s5: hot rolling the fiber web on the conveyor belt in the S4 by using a smooth roll, wherein the hot rolling temperature is 150 ℃, and the hot rolling pressure is 80daN/cm, so that a smooth mesh fabric is formed;

s6: spraying the filtering melt out of a spinning nozzle by air flow drafting, wherein the air flow pressure is 56Kpa and the air flow temperature is 50 ℃, and uniformly spraying the filtering melt on the smooth screen cloth in S5 to form a composite screen cloth;

s7: hot rolling the composite mesh cloth in the S6 by using a patterned roller, wherein the hot rolling temperature is 160 ℃, and the hot rolling pressure is 90daN/cm, so as to obtain the formed cloth;

s8: and (4) carrying out air cooling treatment on the formed cloth in the S7, wherein the air cooling temperature is 20 ℃, after the formed cloth is cooled to room temperature, carrying out rolling treatment on the formed cloth, and cutting the rolled formed cloth after rolling, thereby obtaining the finished product of the secondary forming non-woven fabric with low shrinkage rate.

EXAMPLE III

The components of each material are as follows: 84% of polypropylene particles, 8% of titanium dioxide, 1.1% of color master batch particles, 3.9% of coupling agent and 3% of dispersing agent.

The preparation process of the low-shrinkage secondary forming non-woven fabric comprises the following steps:

s1: putting the polypropylene particles, the titanium dioxide, the color master particles, the coupling agent and the dispersing agent into a stirrer together, stirring at the stirring speed of 180 revolutions per minute for 40 minutes to obtain a mixture after stirring;

s2: pouring the mixture obtained in the step S1 into a screw extruder, and carrying out hot melting on the mixture by the screw extruder at the heating temperature of 186 ℃ to form a melt;

s3: introducing the melt obtained in the step S2 into a filter, and filtering and removing impurities in the melt to obtain a filtered melt;

s4: introducing the filtered melt obtained in the step S3 into a spinning machine, and spraying the filtered melt out of a spinning nozzle through air flow drafting with the air flow pressure of 5Kpa and the air flow temperature of 60 ℃ to form a fiber web;

s5: hot rolling the fiber web on the conveyor belt in the S4 by using a smooth roll, wherein the hot rolling temperature is 152 ℃, and the hot rolling pressure is 80daN/cm, so as to form a smooth mesh fabric;

s6: spraying the filtering melt out of a spinning nozzle by air flow drafting with the air flow pressure of 5Kpa and the air flow temperature of 60 ℃, and uniformly spraying the filtering melt on the smooth screen cloth in S5 to form a composite screen cloth;

s7: hot rolling the composite mesh cloth in the S6 by using a patterned roller, wherein the hot rolling temperature is 162 ℃, and the hot rolling pressure is 90daN/cm, so as to obtain a formed cloth;

s8: and (4) carrying out air cooling treatment on the formed cloth in the S7, wherein the air cooling temperature is 22 ℃, after the formed cloth is cooled to room temperature, carrying out rolling treatment on the formed cloth, and cutting the rolled formed cloth after rolling, thereby obtaining the finished product of the secondary forming non-woven fabric with low shrinkage rate.

Polypropylene particles, titanium dioxide, color master particles, a coupling agent and a dispersing agent are mixed and stirred, then raw materials are heated to form a melt and are filtered to form a filtering melt, then the filtering melt is uniformly sprayed on a net-forming conveyor belt through air drafting to form a fiber net, the fiber net is subjected to smooth roll hot rolling to obtain first shaping of the fiber net and form a smooth net cloth, then the filtering melt is uniformly sprayed on the smooth net cloth again to form a composite net cloth, and the composite net cloth is subjected to roller hot rolling treatment to obtain second shaping of the composite net cloth, so that the forming cloth has higher strength, the dispersion of surface fibers of the finished non-woven cloth in the using process is prevented, and the finished non-woven cloth with low shrinkage is obtained, and a better using effect is achieved.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes by using the technical contents disclosed in the above description to other fields, but any simple modification, equivalent change and change made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.