TW201821663A - Thermal spraying nonwoven fabric and method and composition for forming the same - Google Patents

Abstract

A thermal spraying nonwoven fabric and method and composition for forming the same are provided. The method includes performing mixing and dispersing process to the composition, so as to form the powder. Afterwards, performing thermal spraying process to the powder, so as to form the thermal spraying nonwoven fabric. The composition includes PPS thermal spraying material and PEI additive agent, wherein the additive amount of the PEI additive is smaller than 10 wt% based on the total weight of the composition.

Description

Meltblown nonwoven fabric and method and composition for forming the same

The present invention relates to a melt-blown nonwoven fabric and a method and composition for forming the same, and more particularly, to a melt-blown nonwoven fabric having good heat shrinkage resistance under high temperature conditions and a method and composition for forming the same. .

Polyphenylene Sulfide (PPS) meltblown non-woven fabric has ultra-fine fibers and tiny pores, which can enhance the filtration of suspended particles by the pin-rolled filter bag, improve the dust removal efficiency and service life of the filter bag, and improve the previous high-temperature filter. The disadvantage of the bag is not ideal for trapping tiny suspended particles. In addition, no solvent that can dissolve polyphenylene sulfide below 200 ° C has been found. Its resistance to inorganic acids, bases, and salts is extremely strong. Therefore, it can be used as a preferred material for solvent filtration.

Based on the high temperature resistance characteristics of polyphenylene sulfide meltblown cloth, the use environment is often in a high temperature state, but it has a heat shrinkage phenomenon at high temperatures. In the conventional technique of styling polyphenylene sulfide nonwovens, heat setting is mainly used to eliminate internal stress, improve the ability to recover from deformation, and maintain the state during sizing. However, since the heat setting method must be melt blown before heat setting, an extra procedure is required and the tensile strength of the non-woven fabric may be reduced. Therefore, it has the disadvantages of complicated procedures and high manufacturing costs, and the heat shrinkage resistance is not as expected good.

Based on the above, a method that can effectively prevent the thermal shrinkage of polyphenylene sulfide meltblown nonwovens under high temperature conditions, while improving the disadvantages of the tedious process in the prior art, thereby achieving the simplification of the manufacturing process and the cost savings, is currently required Important topics for research.

The invention provides a meltblown nonwoven fabric and a method and composition for forming the same. The method can effectively prevent the polyphenylene sulfide meltblown nonwoven fabric from thermal contraction under high temperature conditions, so that the formed meltblown nonwoven fabric has good heat resistance. Shrinkage, while improving the disadvantages of the tedious process in the prior art, thereby achieving the effect of simplified process.

The composition for forming a meltblown nonwoven fabric of the present invention includes a polyphenylene sulfide meltblown raw material and a polyether sulfide imine additive, wherein the polyether sulfide imide additive is based on the total weight of the composition used to form the meltblown nonwoven fabric. The added amount is 10 wt% or less.

In an embodiment of the present invention, the particle size of the powder of the polyphenylene sulfide meltblown raw material is, for example, 0.1 μm to 100 μm, and the particle size of the powder of the polyethersulfonimide additive is, for example, 0.1 μm to 100 μm.

The method for forming a melt-blown nonwoven fabric of the present invention includes the following steps. The above-mentioned composition for forming a melt-blown nonwoven fabric is subjected to a mixing and dispersion process to form a powder. Then, the powder is subjected to a melt-blown process to form a melt-blown nonwoven fabric.

In an embodiment of the present invention, the rotation speed of the mixing and dispersing process is, for example, 2500 rpm, and the mixing and dispersing time is, for example, 15 minutes.

In an embodiment of the present invention, the granulation process is performed at a temperature of 260 ° C. to 270 ° C. and a rotation speed of 100 rpm, for example, and the yield is 10 kg / hr.

In one embodiment of the present invention, the melt-blowing process is performed at a temperature of 250 ° C. to 350 ° C., for example.

In an embodiment of the present invention, after the powder is formed, the powder is subjected to a granulation process to form a mother particle, and the mother particle is subjected to a melt-blown process to form a melt-blown nonwoven fabric.

The melt-blown nonwoven fabric of the present invention is made by using the above method for forming a melt-blown nonwoven fabric, wherein the heat-blown ratio of the melt-blown nonwoven fabric after standing at a temperature of 100 ° C for 24 hours is 23% or less, and standing at a temperature of 190 ° C The heat shrinkage ratio after 24 hours is 30% or less.

In one embodiment of the present invention, the basis weight of the meltblown nonwoven fabric is, for example, 100 g / m ² .

Based on the above, the present invention proposes a method for forming a meltblown non-woven fabric, in which a small amount of sterically hindered and amorphous polyethersulfonimide additive is added to the polyphenylene sulfide meltblown raw material to replace the conventional technology The tedious process of heat setting prevents the heat shrinkage of the polyphenylene sulfide meltblown nonwoven fabric caused by pi-pi stacking under high temperature conditions, so that the formed meltblown nonwoven fabric has good resistance. Heat shrinkability.

In order to make the above features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail below.

The invention provides a method for forming a melt-blown nonwoven fabric, which includes the following steps. First, a composition for forming a melt-blown nonwoven fabric is subjected to a mixing and dispersion process to form a powder. Then, the powder is subjected to a melt-blown process to form a melt-blown nonwoven fabric. In addition, after the powder is formed, the powder may be subjected to a granulation process to form a mother particle, and then the mother particle may be subjected to a melt-blown process to form a melt-blown nonwoven fabric. That is, the powder formed by the composition for forming the melt-blown nonwoven fabric may be directly subjected to the melt-blowing process, or the mother particles formed from the powder may be subjected to the melt-blowing process. Hereinafter, each detail in the method for forming a melt-blown nonwoven fabric of the present invention will be described in detail. < Composition for forming melt-blown nonwoven fabric >

In this embodiment, the composition for forming the meltblown nonwoven fabric may include a polyphenylene sulfide meltblown raw material and a polyetherimide (PEI) additive. Polyether sulfide imide additives have three-dimensional obstacles and are amorphous. The processing temperature of meltblown and granulation is also very close to that of polyphenylene sulfide. Therefore, it can replace the tedious heat setting method in the conventional technology. Prevent the thermal shrinkage of polyphenylene sulfide meltblown nonwoven fabric caused by pi-pi stacking under high temperature conditions.

More specifically, the amount of the polyether sulfonium imide additive is, for example, 10% by weight or less based on the total weight of the composition for forming the meltblown nonwoven fabric. Due to the heat-resistant effect of the polyetherimide polymer, if it is added in excess (addition amount exceeds 10 wt%), it may be difficult to heat meltblown. Therefore, when the addition amount of the polyetherimide additive is less than 10 wt%, Only at the same time can have the effect of preventing heat shrinkage and make the melt-blown progress smoothly.

In this embodiment, the powder particle diameter of the polyphenylene sulfide meltblown raw material is, for example, 0.1 μm to 100 μm, and the powder particle diameter of the polyether sulfide imine additive is, for example, 0.1 μm to 100 μm. ＜ Mixed dispersion process ＞

In this embodiment, a composition for forming a meltblown nonwoven fabric is subjected to a mixing and dispersion process to form a powder. The rotation speed of the mixing and dispersion process is, for example, 2500 rpm, and the mixing and dispersion time is, for example, 15 minutes. More specifically, the mixed dispersion process is performed at room temperature, for example. The mixed dispersion process can be performed using, for example, a model FC-25 model manufactured by Qiaolong Machinery Co., but the present invention is not limited thereto. ＜ Granulation process after mixing and dispersing ＞

In this embodiment, a granulation process is performed on the powder to form a master batch. More specifically, the granulation process is performed, for example, at a temperature of 260 ° C to 270 ° C and a rotation speed of 100 rpm, and the yield is, for example, 10 kg / hr. ＜ Melt Blowing Process ＞

In this embodiment, a melt-blown process is performed on the above-mentioned powder or the mother particles formed by the granulation process to form a melt-blown nonwoven fabric. More specifically, the melt-blowing process is performed at, for example, a temperature of 250 ° C to 350 ° C. ＜ Meltblown Nonwovens ＞

By using the method for forming a meltblown nonwoven fabric proposed by the present invention, a meltblown nonwoven fabric having good heat shrinkage resistance under high temperature conditions can be produced. The heat shrinkage of the meltblown nonwoven fabric after standing for 24 hours at a temperature of 100 ° C The ratio is, for example, 23% or less, and the heat shrinkage ratio after standing at a temperature of 190 ° C for 24 hours is, for example, 30% or less. The temperatures of 100 ° C and 190 ° C are the high temperature ranges commonly used for polyphenylene sulfide meltblown nonwovens. Therefore, compared with the meltblown nonwovens manufactured by the conventional heat setting method, the polyphenylene sulfide meltblown nonwovens of the present invention are used at high temperatures. Has more excellent heat shrinkage resistance. In this embodiment, the basis weight of the melt-blown nonwoven fabric is, for example, 100 g / m ² .

Hereinafter, the melt-blown nonwoven fabric made by the forming method proposed in the above-mentioned embodiment will be described in detail through experimental examples. However, the following experimental examples are not intended to limit the present invention. Experimental example

In order to prove that the method for forming a melt-blown nonwoven fabric proposed by the present invention can produce a melt-blown nonwoven fabric having good heat shrinkage resistance under high temperature conditions, this experimental example is specifically made below.

It must be noted that, since the method for forming the meltblown nonwoven fabric has been described in detail above, the preparation of the meltblown nonwoven fabric is omitted below for the sake of convenience. Preparation of Meltblown Nonwovens and Evaluation of Thermal Shrinkage

According to the method for forming a melt-blown nonwoven fabric of the present invention, the melt-blown nonwoven fabrics of Examples 1 to 4 and Comparative Examples were prepared according to the composition conditions listed in Table 1 below, and Examples 1 to 4 and Comparative Examples were measured. The heat-shrinkage ratio and the limiting oxygen index (LOI, Limiting Oxygen Index) of the melt-blown nonwoven fabric of the example after standing at a temperature of 100 ° C and 190 ° C for 24 hours.

The heat shrinkage ratio is measured by first cutting the meltblown nonwoven into squares with a width of 10 cm each, and then estimating it with the following formula: Table 1

As shown in Table 1 above, compared to the comparative example using pure polyphenylene sulfide, Examples 1 to 4 prepared using the composition of the present invention and formed by the forming method of the present invention at temperatures of 100 ° C and 190 ° C It has better heat shrinkage resistance after standing for 24 hours. In more detail, when the amount of the polyether sulfide imide additive is 10 wt% or less based on the total weight of the composition for forming the meltblown nonwoven fabric, the meltblown nonwoven fabric produced by using the forming method of the present invention The heat shrinkage ratio after standing at a temperature of 100 ° C for 24 hours is 23% or less, and the heat shrinkage ratio after standing at a temperature of 190 ° C for 24 hours is 30% or less. Therefore, by the composition and the formation method provided by the present invention, the melt-blown nonwoven fabric can be effectively prevented from thermal shrinkage under the high temperature environment generally used.

In addition, according to the forming method of the present invention, the powder formed by the composition for forming a melt-blown nonwoven fabric can be directly subjected to a melt-blowing process, or the mother particles formed by the aforementioned powder granulation can be subjected to a melt-blowing process. As shown in Table 1 above, it can be known that the non-woven fabric made by using the masterbatch for the meltblown process has better heat shrinkage resistance after standing at 100 ° C and 190 ° C for 24 hours, and the content of PEI is 3% by weight. In the above case, the effect of no heat shrinkage can be achieved. TGA Thermal Quality Measurement of Meltblown Nonwovens

TGA thermal mass measurement was performed on the master batches of measurement examples 1 to 4 and comparative examples, and the thermal cracking temperatures are listed in Table 2 below. Table 2

As can be seen from Table 2 above, compared to the comparative example without the polyether sulfonium imine additive, the thermal cracking temperature in Examples 1 to 4 in which polyether sulfonium imide additives were added at less than 10% by weight, respectively, was not observed. The change is too great. Therefore, it can be known that the method for forming a non-woven fabric by adding a polyetherimine additive to prevent heat shrinkage in the present invention does not affect the heat resistance of the product (for example, thermal cracking).

In summary, the present invention proposes a method for forming a meltblown nonwoven fabric, in which a small amount of sterically hindered and amorphous polyether sulfonimide additive is added to the polyphenylene sulfide meltblown raw material to replace the conventional The relatively complicated process of heat setting in the technology prevents the heat shrinkage of the polyphenylene sulfide meltblown nonwoven fabric caused by pi-pi stacking under high temperature conditions, so that the formed meltblown nonwoven fabric has Good heat shrinkage resistance, at the same time, it has the advantages of simplifying the manufacturing process and reducing the manufacturing cost. In addition, compared with the conventional heat setting method, the melt-blown nonwoven fabric produced by using the forming method of the present invention has more excellent heat shrinkage resistance.

Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.

no

no

Claims (9)

A composition for forming a meltblown nonwoven fabric, comprising: a polyphenylene sulfide meltblown raw material; and a polyether sulfide imine additive, wherein the polymer is based on the total weight of the composition for forming the meltblown nonwoven fabric. The addition amount of the ether sulfonium imine additive is 10 wt% or less. The composition for forming a meltblown non-woven fabric according to item 1 of the scope of patent application, wherein the powder particle size of the polyphenylene sulfide meltblown raw material is 0.1 μm to 100 μm, and the polyethersulfonimide additive The powder has a particle size of 0.1 μm to 100 μm. A method for forming a melt-blown nonwoven fabric, comprising: performing a mixing and dispersion process on the composition for forming a melt-blown nonwoven fabric as described in item 1 of the scope of patent application to form a powder; and melting the powder. Spraying process to form a meltblown nonwoven. The method for forming a melt-blown nonwoven fabric according to item 3 of the scope of the patent application, wherein the speed of the mixing and dispersing process is 2500 rpm, and the mixing and dispersing time is 15 minutes. The method for forming a melt-blown nonwoven fabric according to item 3 of the scope of patent application, wherein the granulation process is performed at a temperature of 260 ° C to 270 ° C and a rotation speed of 100 rpm, and the output is 10 kg / hr. The method for forming a melt-blown nonwoven fabric according to item 3 of the scope of application for a patent, wherein the melt-blown process is performed at a temperature of 250 ° C to 350 ° C. The method for forming a melt-blown nonwoven fabric as described in item 3 of the scope of patent application, further comprising, after forming the powder, performing a granulation process on the powder to form a master batch, and performing the master batch Meltblown process to form a meltblown nonwoven. A meltblown nonwoven fabric made by using the method for forming a meltblown nonwoven fabric as described in claims 3 to 7 of the scope of application for a patent, wherein the meltblown nonwoven fabric is heated at a temperature of 100 ° C for 24 hours after being left to stand. The shrinkage ratio is 23% or less, and the heat shrinkage ratio after standing at a temperature of 190 ° C for 24 hours is 30% or less. The melt-blown nonwoven fabric according to item 8 of the scope of patent application, wherein the basis weight of the melt-blown nonwoven fabric is 100 g / m ² .