CN106551423A - A kind of anion melt-blown micro fibre cigarette filter tip material and preparation method thereof - Google Patents

Abstract

The present invention relates to a kind of anion melt-blown superfine fiber cigarette filter material and preparation method thereof, the negative ion melt-blown superfine fiber cigarette filter material of the present invention is the melt-blown superfine fiber of diameter 1-5 μm; The melt-blown superfine fiber The fine fibers are made of 94-99 parts by weight of polypropylene slices and 1-6 parts by weight of nano-tourmaline masterbatch; the nano-tourmaline masterbatch is made by mixing nano-scale tourmaline powder with polypropylene slices, And the content of tourmaline is 20-40% of the mass of nano-tourmaline masterbatch; the melt-blown superfine fiber has undergone electret treatment. The present invention improves the conventional melt-blown method, and changes the traditional one-time fabric forming into direct preparation of ultra-fine fiber bundles, and the fiber fineness is uniform. The negative ion melt-blown ultra-fine fiber cigarette filter material of the present invention has a small pressure drop, The advantages of good air permeability and the generation of negative ions to freshen the air can significantly improve the filtering effect of harmful substances in the flue gas, and can avoid environmental pollution problems in the production of cellulose acetate.

Description

A kind of negative ion melt-blown superfine fiber cigarette filter material and preparation method thereof

technical field

The invention relates to the field of cigarette filter material and the non-woven field, in particular to an anion melt-blown superfine fiber cigarette filter material and a preparation method thereof.

Background technique

Cigarette smoke contains particles, commonly known as tar. Tar contains a large number of chemical components, 4000 to 5000 kinds, all of which are products of incomplete combustion of tobacco. Cigarette filters are used to filter tar and other harmful substances in tobacco. Now the commonly used cigarette filter material is cellulose acetate cigarette filter, and cellulose acetate is made by wet spinning, the production process is long, and the solvent used in the spinning process is harmful to the environment and pollutes the three wastes. In addition, the effect of cellulose acetate fiber in filtering harmful carcinogens (such as polycyclic aromatic hydrocarbons and aldehydes) in mainstream cigarette smoke is not very satisfactory, and only about 40% of polycyclic aromatic hydrocarbons are removed.

Cigarette filters can filter smoke components to reduce the inhalation of tar and nicotine. However, after the cigarette is equipped with a cigarette filter, the suction resistance is greatly increased, and there are more toxic substances. For example, carbon monoxide, benzopyrene, etc. are all produced by the incomplete combustion of organic substances contained in tobacco during the smoking process. The greater the resistance during smoking, the less sufficient the oxygen supply, the more incomplete the combustion, and the lower the amount of toxic substances produced. more. The finer the fibers, the better the filtration performance. The three main functions of cigarette cigarette filters include direct interception, inertial compaction, and diffusion sedimentation, the most common being direct interception of cigarette filters. Filtration is a complex process, which means that after the tar droplets are separated from the smoke, they adhere to the surface of the cigarette filter material when they reach it. The finer the fiber, the higher the filtration efficiency of the cigarette filter. The diameter of acetate fiber used in conventional filters is between 7 and 20 μm.

Contents of the invention

In order to solve the problem of low filtration efficiency of cigarette filter materials in the prior art, the present invention provides an anion melt-blown ultra-fine fiber cigarette filter material and a preparation method thereof.

The technical scheme that the present invention solves the problems of the technologies described above is as follows:

A negative ion melt-blown superfine fiber cigarette filter material, the diameter of the melt-blown superfine fiber is 1-5 μm.

Further, the melt-blown microfiber is made of 94-99 parts by weight of polypropylene material and 1-6 parts by weight of nano-tourmaline masterbatch.

Further, the melt-blown ultrafine fibers have been subjected to electret treatment.

A kind of preparation method of negative ion melt-blown superfine fiber cigarette filter tip material is characterized in that, specifically comprises the following steps:

Step S1, uniformly mixing 94-99 parts by weight of polypropylene material and 1-6 parts by weight of nano-tourmaline masterbatch to obtain a mixture;

Step S2, the melt-blown device uses the mixture to prepare melt-blown ultrafine fibers;

Step S3, the cooling and clustering device cools and clusters the melt-blown ultrafine fibers ejected from the melt-blown device;

Step S4, the collecting device conducts electret treatment and collection on the melt-blown ultrafine fiber to obtain electret ultrafine fiber cigarette filter material.

Further, the nano-tourmaline masterbatch in the step S1 is made by mixing nano-scale tourmaline material and polypropylene material, and the content of tourmaline is 20-40% of the mass of the nano-tourmaline masterbatch.

Further, the cooling and converging device in the step S3 includes a cold air box and a screen receiving device; the step S3 is specifically: the cold air box cools the melt-blown ultrafine fibers, and the cooled melt-blown ultrafine fibers are sequentially dropped along the On the curtain receiving device driven in the width direction of the melt blown die head in the melt blowing device, the curtain receiving device bundles the melt blown ultrafine fibers to obtain ultrafine fiber bundles.

Further, the cooling and clustering device in step S3 includes a cold air box and a first clustering device; the step S3 specifically includes: the cold air box cools the melt-blown ultrafine fibers ejected from the melt-blowing device, and the first A clustering device bundles the cooled melt-blown ultrafine fibers; and the width of the first clustering device along the width direction is not smaller than the width of the melt-blown die head in the melt-blowing device along the width direction.

Further, after the melt-blown ultra-fine fibers are cooled and bundled by the cooling and bundling device, they are also subjected to electret treatment by an electret processing device.

Further, the electret voltage of the electret processing device is 5-20kV, the electret interval is 20-60mm, and the electret time is 5-10s.

The beneficial effects of the present invention are: the finer the fiber, the higher the filter efficiency of the cigarette filter. The diameter of the acetate fiber used in the conventional filter is between 7 and 20 μm. The fiber non-woven fabric is obtained, and the conventional melt-blown method is improved in the present invention, and the cooling of the melt-blown fibers is accelerated by increasing the cold side air blowing, so that the fibers are collected under complete cooling, avoiding the bonding between the melt-blown fibers, and also It can prevent the fiber from de-orientation at a higher temperature, the superfine fiber retains a certain degree of orientation, and the fiber strength is improved. At the same time, changing the screen mesh from the traditional non-woven fabric to move perpendicular to the web width direction to move along the web width direction, can directly produce ultra-fine fiber bundles with a diameter of 1-5 μm. By adopting the technical solution of the invention, fibers with smaller diameters can be prepared, thereby increasing the filtering effect of the fibers. The present invention also adopts tourmaline as a manufacturing raw material, and tourmaline can continuously release negative ions. Negative ions, known as vitamins in the air, are inhaled into the human body, can regulate the excitement of the nerve center, improve the ventilation function of the lungs, improve blood circulation, promote metabolism, and enhance human immunity.

The negative ion melt-blown ultrafine fiber filter material of the present invention has the advantages of small pressure drop, good air permeability, generation of negative ions to freshen the air, and obvious improvement in the filtering effect of harmful substances in the flue gas, and can avoid environmental pollution in the production of cellulose acetate pollution problem. And the cigarette filter material that the present invention adopts is thermoplastic material, and source is abundant, and price is cheap, and adopts melt-blown method to produce superfine fiber cigarette filter material, and production process is simple, pollution-free, and production efficiency is high, and the superfine fiber that obtains The diameter is between 1 and 5 μm and the uniform diameter change is small, so the filtering effect is high. At the same time, the tourmaline mineral evenly embedded in the microfiber can continuously release high-concentration negative ions, and the cigarettes with negative ion melt-blown superfine fiber cigarette filters can be discarded from the time the cigarette is manufactured and packed into the box until it is used up , has been under the action of negative ions. The result of the long-term effect is to reduce the content of tar and nicotine harmful substances, and play a certain role in freshness preservation and anti-mildew, so that the irritation of cigarettes is weakened and the taste is soft. During the smoking process of cigarettes, the smoke after burning collides violently with high-concentration negative ions when passing through the filter with the help of suction, and the harmful components of tobacco tar, nicotine, carbon monoxide, etc. are further decomposed. Due to the limited length of the filter, most of the negative ions are sucked into the mouth together with the smoke before they can play a role, but the decomposition of the negative ions on the harmful components in the smoke is in the mouth, trachea, and lung lobes, and even when the smoker spits it out. Continue in the residual flue gas until it is completely exhausted. After electret treatment, the electret charge storage performance is good, and the charge retention rate can reach more than 2 years.

Description of drawings

Fig. 1 is a schematic structural diagram of the preparation device when the cooling cluster device adopts the first embodiment;

Fig. 2 is a schematic structural diagram of the preparation device when the cooling cluster device adopts the second embodiment.

In the accompanying drawings, the parts list represented by each label is as follows:

1. Melt-blown device; 2. Cold air box; 3. Curtain net receiving device; 4. First clustering device; 5. Collecting device; 6. Melt-blown ultrafine fiber; 7. Electret processing device; 9. Oil tanker; 10. Second cluster device

detailed description

The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

A negative ion melt-blown superfine fiber cigarette filter material is a melt-blown superfine fiber with a diameter of 1-5 μm.

The melt-blown superfine fiber is made of 94-99 parts by weight of polypropylene material and 1-6 parts by weight of nano tourmaline master batch.

The melt-blown ultra-fine fibers have undergone electret treatment.

A preparation method for negative ion melt-blown ultra-fine fiber cigarette filter material, specifically comprising the following steps:

Step S1, uniformly mixing 94-99 parts by weight of polypropylene material and 1-6 parts by weight of nano-tourmaline masterbatch to obtain a mixture;

Step S2, the melt-blown device 1 prepares melt-blown ultrafine fibers 6 using the mixture;

Step S3, the cooling and bundling device cools and bundles the melt-blown ultrafine fibers 6 ejected from the melt-blown device 1;

Step S4, the collection device 5 performs electret treatment and collection on the melt-blown ultrafine fibers 6 to obtain the electret ultrafine fiber cigarette filter material.

The nano tourmaline master batch in the step S1 is made by mixing nano-scale tourmaline material and polypropylene material, and the content of tourmaline is 20-40% of the mass of the nano tourmaline master batch.

In the first embodiment of the cooling and clustering device, the cooling and clustering device in the step S3 includes a cold air box 2 and a screen receiving device 3; the step S3 is specifically: the cold air box 3 cools the melt-blown ultrafine fiber 6, The cooled melt-blown ultrafine fibers 6 sequentially fall on the curtain receiving device 3 driven along the width direction of the melt-blown die in the melt-blown device 1, and the melt-blown ultrafine fibers 6 are bundled to obtain ultrafine fiber bundles.

The melt-blown ultrafine fibers 6 are bundled by the screen receiving device 3 , then electret-treated by the electret processing device 7 , further bundled by the second bundler 10 , and then enter the collecting device 5 .

In the second embodiment of the cooling cluster device, the cooling cluster device in the step S3 includes the cold air box 2 and the first cluster device 4; Spray microfibers 6 to cool, and the first clustering device 4 bundles the cooled melt-blown ultrafine fibers 6; and the width of the first clustering device 4 along the width direction is not less than the melted The width of the injection die head along the width direction.

The melt-blown ultrafine fibers 6 are bundled by the first bundler 4 , then electret-treated by the electret processing device 7 , and then enter the collection device 5 .

The electret voltage of the electret processing device is 5-20kV, the electret interval is 20-60mm, and the electret time is 5-10s.

As shown in Fig. 1 and Fig. 2, it is a kind of preparation device of anion melt-blown superfine fiber cigarette filter tip material, comprises melt-blown device 1, cooling cluster device, electret treatment device and collecting device;

The melt-blowing device 1 is used to prepare the melt-blown superfine fiber 6, and the melt-blown superfine fiber 6 is delivered to the cooling cluster device;

The cooling and clustering device is arranged below the melt-blowing device 1, and is used to cool and bundle the melt-blown ultrafine fibers 6 ejected from the melt-blown device 1 to obtain ultrafine fiber bundles;

The electret treatment device is used for electret treatment of ultrafine fiber bundles;

The collecting device is used for processing and collecting the superfine fiber bundles to obtain the electret superfine fiber cigarette filter material.

The collecting device 5 is a cutting machine. After the oil tanker 9 oils the melt-blown ultrafine fibers 6, the guide wire device guides the melt-blown ultrafine fibers into the cutting machine, and the cutter cuts the melt-blown ultrafine fibers 6 into uniform small sections. As an anion melt-blown microfiber cigarette filter material.

As shown in Figure 1, it is the first embodiment of the cooling cluster device, which includes a cold air box 2 and a screen receiving device 3;

The cold air box 2 is arranged under the melt-blown die head in the melt-blown device 1 for cooling the melt-blown ultrafine fibers 6 ejected from the melt-blown device 1, and the curtain receiving device 3 is arranged in the cold air box 2 Below, it is used to bundle the cooled melt-blown ultra-fine fibers 6; the curtain receiving device 3 is along the width direction of the melt-blown die head in the melt-blown device 1, from one end away from the electret processing device 7, Drive to one end close to the electret processing device 7.

The screen receiving device 3 is provided with a suction device for sucking the melt blown microfiber 6 onto the upper surface of the screen receiving device 3 .

When cooling the first embodiment of the bundling device, a second bundling device 10 is provided between the electret processing device and the collecting device 5 for further bundling the ultrafine fiber bundles.

As shown in Figure 2, it is a second embodiment of the cooling cluster device, which includes a cold air box 2 and a first cluster device 4; the cold air box 2 is arranged below the melt blown die head in the melt blown device 1, It is used to cool the melt-blown ultrafine fibers 6 ejected from the melt-blown device 1, and the first clustering device 4 is arranged below the cold air box 2, and is used to bundle the cooled melt-blown ultrafine fibers 6 to obtain superfine fibers. Fine fiber bundles: the superfine fiber bundles are transported to the electret processing device 7 through the fiber channel 8, and the superfine fibers enter the collecting device after electret treatment for cutting and collection. The function of the fiber channel 8 is to support and guide the fiber bundles, which can be in the form of a pallet or the like. The width of the first clustering device 4 along the width direction is not less than the width of the melt-blown die head in the melt-blowing device 1 along the width direction, so all ultrafine fibers ejected from the melt-blowing device can enter the clustering device 4 for clustering .

Both the first converging device 4 and the second converging device 10 can be horn-mouth concentrators. The second clustering device 10, the wire guide device and the cutting machine can be fixed by brackets or the like.

Example 1

A method for negative ion melt-blown superfine fiber cigarette filter material, comprising the following steps:

Step S1, crushing the tourmaline into nanoscale and mixing it with polypropylene slices to make nano-tourmaline masterbatch, the content of tourmaline in the nano-tourmaline masterbatch is 20% of the mass of tourmaline masterbatch;

Step S2, taking 96 parts by weight of polypropylene pellets and 4 parts by weight of nano-tourmaline masterbatch and mixing them uniformly to obtain a mixture;

Step S3, set the temperature of the four regions of the preparation device for negative ion melt-blown ultra-fine fiber cigarette filter material at 260°C, 260°C, 270°C, and 270°C, and feed the mixture obtained in step S2 into the screw extruder The silo is used to form the melt through the screw melting extruder;

Step S4, the melt is sprayed out through the spinneret after passing the metering pump, and drawn under 220°C and 0.4MPa hot air to obtain melt-blown ultra-fine fibers. After the melt-blown ultra-fine fibers are cooled, they are bundled with a curtain collection device or a clustering device ;

Step S5, performing electret treatment on the melt-blown ultrafine fibers obtained in step S4 by means of high-voltage corona discharge, the electret voltage is 20kV, the electret interval is 20mm, and the electret time is 10s;

Step S6, the electret-treated melt-blown ultrafine fibers are sequentially collected into bundles, glued, shaped and cut to obtain negative ion melt-blown ultrafine fiber cigarette filter materials.

The anion meltblown ultrafine fiber cigarette filter material produced in this embodiment has an average diameter of ultrafine fibers of 4 μm, which can increase the concentration of negative ions in the air by 800/cm ³ , and the filtration efficiency reaches 95%.

Example 2

Step S1, crushing the tourmaline into nanoscale and mixing it with polypropylene slices to make nano tourmaline master batches, the content of tourmaline in the nano tourmaline master batches is 30% of the mass of the tourmaline master batches;

Step S2, taking 95 parts by weight of polypropylene pellets and 5 parts by weight of nano-tourmaline masterbatch and mixing them uniformly to obtain a mixture;

Step S3, set the temperature in the four regions of the negative ion melt-blown ultra-fine fiber cigarette filter material preparation device at 260°C, 260°C, 270°C, and 270°C, and feed the mixture obtained in step S2 into the screw extruder. bin, forming a melt through a screw melting extruder;

Step S4, the melt is sprayed out through the spinneret after passing the metering pump, and drawn under 220°C and 0.4MPa hot air to obtain melt-blown ultra-fine fibers. After the melt-blown ultra-fine fibers are cooled, they are bundled with a curtain collection device or a clustering device ;

Step S5, performing electret treatment on the melt-blown ultrafine fibers obtained in step S4 by means of high-voltage corona discharge, the electret voltage is 20kV, the electret interval is 20mm, and the electret time is 10s;

Step S6, the electret-treated melt-blown ultrafine fibers are sequentially collected into bundles, glued, shaped and cut to obtain negative ion melt-blown ultrafine fiber cigarette filter materials.

The anion meltblown ultrafine fiber cigarette filter material produced in this embodiment has an average ultrafine fiber diameter of 2 μm, can increase the concentration of negative ions in the air by 1200/cm ³ , and have a filtration efficiency of 98%.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (9)

1. a kind of anion melt-blown micro fibre cigarette filter tip material, it is characterised in that melt-blown micro fibre is a diameter of 1-5 μm.

2. anion melt-blown micro fibre cigarette filter tip material according to claim 1, it is characterised in that described melt-blown super Fine fibre is made up of the nano-tourmaline master batch of the polypropylene material and 1-6 weight portions of 94-99 weight portions.

3. anion melt-blown micro fibre cigarette filter tip material according to claim 1, it is characterised in that described melt-blown super Fine fibre have passed through electret process.

4. a kind of preparation method of anion melt-blown micro fibre cigarette filter tip material, it is characterised in that specifically include following step Suddenly：

Step S1, the nano-tourmaline master batch of the polypropylene material of 94-99 weight portions and 1-6 weight portions is uniformly mixed, obtained Compound；

Step S2, device for melt blowing (1) prepare melt-blown micro fibre (6) using compound；

Step S3, cooling beaming device are cooled down and boundling to the melt-blown micro fibre (6) that device for melt blowing (1) sprays；

Step S4, collection device (5) are processed and are collected to melt-blown micro fibre (6), obtain the filter of electret superfine fibre medicated cigarette Mouth material.

5. the preparation method of anion melt-blown micro fibre cigarette filter tip material according to claim 4, it is characterised in that The nano-tourmaline master batch of step S1 is mixed with polypropylene material by nano level electric stone material, and tourmaline Content for nano-tourmaline master batch quality 20-40%.

6. anion melt-blown micro fibre cigarette filter tip material according to claim 4, it is characterised in that step S3 Cooling beaming device include packaged air conditioner (2) and curtain net reception device (3)；Step S3 is specially：Packaged air conditioner (3) is to melt-blown Superfine fibre (6) is cooled down, and the melt-blown micro fibre (6) after cooling falls along meltblown beam in device for melt blowing (1) successively Fabric width direction transmission curtain net reception device (3) on, curtain net reception device (3) is surpassed to melt-blown micro fibre (6) boundling Fine fibre beam.

7. anion melt-blown micro fibre cigarette filter tip material according to claim 4, it is characterised in that step S3 Cooling beaming device include packaged air conditioner (2) and the first beaming device (4)；Step S3 is specially：The packaged air conditioner is to molten The melt-blown micro fibre (6) of the ejection of spray apparatus (1) is cooled down, first beaming device (4) to cooling after it is melt-blown super Fine fibre (6) carries out boundling；And width of first beaming device (4) along fabric width direction is melted not less than in device for melt blowing (1) Width of the jet mould head along fabric width direction.

8. the anion melt-blown micro fibre cigarette filter tip material according to claim 4-7, it is characterised in that described melt-blown Superfine fibre (6) also carries out electret process through electret processing meanss (4) Jing after the cooling of cooling beaming device and boundling.

9. the preparation method of the anion melt-blown micro fibre cigarette filter tip material according to claims 8, its feature exist In the electret voltage of, electret processing meanss (4) be 5-20kV, electret interval 20-60mm, electret time 5-10s.