Background technology
Containing several thousand kinds of chemical compositions in the smog produced during cigarette combustion, comprising solid phase and gaseous substance, the overwhelming majority is harmful.Multiple carcinogen and the short cancer materials such as phenol, fumaric acid such as the BaP contained in the tar of special generation, nitrosamine, heavy metal.American Cancer Society points out: the probability that the smoker that smoking every day is less than 10 suffers from lung cancer is 5 times of non-smoker, if smoking every day is more than 2 bags, is then 20 times.Lung cancer person is died from every year up to 1,000,000 people in the whole world, and wherein 90% is directly caused by smoking.Therefore, the cigarette of development low tar content, reduces the harm of cigarette to human body and becomes the task of top priority.
The sixties in 20th century cigarette with filter tip appearance, effectively reduce cigarette tar oil mass.The large portion of current cigarette is with filter tip, but major part all adopts the fibre bundle of single layer structure to form.Applying more is acetate fiber and polypropylene fibre tow.Such cigarette filter only relies on physical barriers effect to be filtered by tar etc., and the tar content that actual filtration is fallen is less.In order to improve the filter efficiency of harmful substance in smog, occurred in filter tip, add specific area in a large number in recent years large, the sorbing material of high adsorption capacity carries out the technology of adsorbing.Such as add the adsorbent etc. that the sorbing materials such as diatomite, active carbon, pomelo peel and other harmful substances that can produce with cigarette are reacted, these materials can improve the filter efficiency of filter tip, but, there is processed complex, affect cigarette flavor taste, produce the shortcoming such as dust harzard and secondary pollution in the composite filter tip adopting these sorbing materials to produce.It is add in original filter tip material by fiber-like higher for tar adsorption amount, stationery, film material that an other class filter tip is improved one's methods, composition multilayer adsorption structure.The such as patent No. is a kind of processing method of microporous barrier and the application on cigarette filter thereof disclosed in CN103521085A, and it is added in filter tip body by the microporous barrier of preparation, utilizes microcellular structure tar and some large molecular gas to be filtered.The microporous barrier adopted in the method because a large amount of tar and particle adhere to film surface, easily causes blockage of the micro orifice situation in filtered tar process, and is difficult to join in filter tip body by film separately in actual production process, and difficulty is produced in industrialization.
Along with improving constantly of health of people consciousness, will be more and more higher to the requirement of filter tip function, filter tip will face the process of a long-term development.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of cigarette filter and preparation method thereof is provided.This filter tip section comprises four layers of filtering adsorbing material, by adsorption filtration effect step by step, reduces the tar, particulate solid and other pernicious gases that produce when smoking.The preparation method of this cigarette filter can realize the combination with existing cigarette production technology, without the need to changing process equipment.
The technical scheme that the present invention solves described cigarette filter is, designs a kind of cigarette filter.The feature of this cigarette filter is that it is made up of porous PET support, electret PP melt spraying non-woven fabrics, micropore PET film and PET skeleton non-woven fabrics and acetate fiber section; Wherein, porous PET support, electret PP melt spraying non-woven fabrics, micropore PET film and PET skeleton non-woven fabrics constitute the fillter section of cigarette filter; Described acetate fiber section is two sections, is positioned at the both sides of described fillter section, is respectively and connects tobacco section and cigarette suction head portion.
The stacked composite sequence of described fillter section is: ground floor is porous PET support, the second layer is electret PP melt spraying non-woven fabrics, third layer is micropore PET film, the 4th layer for PET skeleton non-woven fabrics.During smoking cigarettes, the trend of flue gas is from ground floor to the 4th layer.
The described acetate fiber section near porous PET support is for connecting tobacco section, and the acetate fiber section of described connection PET skeleton non-woven fabrics is cigarette suction head portion.
Described electret PP melt spraying non-woven fabrics is modified Nano tourmaline powder with PP carry out mixing melt-blown, and by the efficient low-resistance non-woven fabrics of preparation after electrostatic electret.Its grammes per square metre is 10-50g/m
2, thickness is 0.1-1mm, and resistance is 0.5-10Pa.
Described porous PET support has high Air permenbility, grammes per square metre 100-180g/m after special drilling technology
2, thickness is 4-10mm.
Described micropore PET film is through high-energy particle bombardment PET film that heavy ion avcceleration produces, is then prepared from through alkali lye or acid solution etching, and pore density is the microporous barrier of 100,000 to several ten million every square centimeter, thickness is 15-50 μm.
Described PET skeleton non-woven fabrics is have good stiffness and ultralow windage, grammes per square metre are 30-120g/m
2, thickness is the wet laid nonwovens of 0.2-1mm.
The integral thickness scope of described fillter section is 5-10mm.
The technical scheme that the present invention solves described cigarette filter preparation method is, designs a kind of cigarette filter preparation method, it is characterized in that adopting above-mentioned cigarette filter to prepare material and following technique:
(1) obtained fillter section after porous PET support, electret PP melt spraying non-woven fabrics, micropore PET film and PET skeleton non-woven fabrics four kinds of materials being carried out stacked compound.
(2) prepared fillter section and two sections of acetate fiber sections are combined, two sections of acetate fiber sections are positioned at the both sides of fillter section, obtain the cigarette filter of three-stage structure.
Due to the enforcement of above technical scheme, the present invention compared with prior art tool has the following advantages:
(1) the electret PP melt-blown material that the present invention adopts overcomes the single physics interception function of traditional filtering material, and this material also relies on electrostatic adsorption, the tar in more effective adsorbing smoke and all kinds of solid particle thing;
(2) the micropore PET film that the present invention adopts has flourishing microcellular structure, and can according to the size of various pernicious gas composition and particulate solid, and the microporous barrier of design different pore size, can play good buffer action;
(3) design of multilayer adsorption structure, can tar adsorption step by step, when tar adsorbs at material surface, can as the carrier of solid particulate matter or other pernicious gases, thus reach the effect that constantly accumulation filters;
(4) material that the present invention uses all has the micropore of different size, and reduces step by step, the particle of the various particle size produced effectively can be tackled, and can prevent the gathering of a large amount of tar from causing film to block on a pet film.
Detailed description of the invention
Below by embodiment, the specific embodiment of the present invention is further illustrated.
Cigarette filter of the present invention, is characterized in that being made up of porous PET support, electret PP melt spraying non-woven fabrics, micropore PET film and PET skeleton non-woven fabrics and acetate fiber section; Wherein, porous PET support, electret PP melt spraying non-woven fabrics, micropore PET film and PET skeleton non-woven fabrics constitute the fillter section of cigarette filter; Described acetate fiber section is two sections, is positioned at the both sides of described fillter section, is respectively and connects tobacco section and cigarette suction head portion.
The stacked composite sequence of described fillter section is: ground floor is porous PET support, the second layer is electret PP melt spraying non-woven fabrics, third layer is micropore PET film, the 4th layer for PET skeleton non-woven fabrics.During smoking cigarettes, the trend of flue gas is from ground floor to the 4th layer.
The described acetate fiber section near porous PET support is for connecting tobacco section, and the acetate fiber section of described connection PET skeleton non-woven fabrics is cigarette suction head portion.
Described electret PP melt spraying non-woven fabrics is modified Nano tourmaline powder with PP carry out mixing melt-blown, and by the efficient low-resistance non-woven fabrics of preparation after electrostatic electret.Its grammes per square metre is 10-50g/m
2, thickness is 0.1-1mm, and resistance is 0.5-10Pa.
Described porous PET support has high Air permenbility, grammes per square metre 100-180g/m after special drilling technology
2, thickness is 4-10mm.
Described micropore PET film is through high-energy particle bombardment PET film that heavy ion avcceleration produces, is then prepared from through alkali lye or acid solution etching, and pore density is the microporous barrier of 100,000 to several ten million every square centimeter, thickness is 15-50 μm.
Described PET skeleton non-woven fabrics is have good stiffness and ultralow windage, and grammes per square metre is 30-120g/m
2, thickness is the wet laid nonwovens of 0.2-1mm.
The integral thickness scope of described fillter section is 5-10mm.
Cigarette filter preparation method of the present invention, is characterized in that adopting above-mentioned cigarette filter to prepare material and following technique:
(1) obtained fillter section after porous PET support, electret PP melt spraying non-woven fabrics, micropore PET film and PET skeleton non-woven fabrics four kinds of materials being carried out stacked compound.
(2) prepared fillter section and two sections of acetate fiber sections are combined, two sections of acetate fiber sections lay respectively at the both sides of fillter section, obtain the cigarette filter of three-stage structure.
Described stacked complex method is the one during hot pressing laminating or adhesive bond.
Embodiment 1
The present embodiment provides a kind of cigarette filter and preparation method thereof, and preparation process is as follows:
(1) be 5mm by thickness, grammes per square metre is 150g/m
2porous PET support, thickness is 0.3mm, resistance 3Pa, 12g/m
2electret PP melt spraying non-woven fabrics, thickness is the micropore PET film of 30 μm, and thickness is 0.5mm, 50g/m
2pET skeleton non-woven fabrics hot pressing mode carries out stacked compound successively and obtains fillter section.
(2) prepared fillter section and two sections of acetate fiber sections are combined, two sections of acetate fiber sections lay respectively at the both sides of fillter section, obtain the cigarette filter of three-stage structure.
Embodiment 2
The present embodiment provides a kind of cigarette filter and preparation method thereof, and preparation process is as follows:
(1) be 8mm by thickness, grammes per square metre is 180g/m
2porous PET support, thickness is 0.5mm, resistance 4Pa, 20g/m
2electret PP melt spraying non-woven fabrics, thickness is the micropore PET film of 25 μm, and thickness is 0.6mm, 60g/m
2pET skeleton non-woven fabrics hot pressing mode carries out stacked compound successively and obtains fillter section.
(2) prepared fillter section and two sections of acetate fiber sections are combined, two sections of acetate fiber sections lay respectively at the both sides of fillter section, obtain the cigarette filter of three-stage structure.
Embodiment 3
The present embodiment provides a kind of cigarette filter and preparation method thereof, and preparation process is as follows:
(1) be 7mm by thickness, grammes per square metre is 160g/m
2porous PET support, thickness is 0.5mm, resistance 4Pa, 20g/m
2electret PP melt spraying non-woven fabrics, thickness is the micropore PET film of 30 μm, and thickness is 0.8mm, 70g/m
2the mode of PET skeleton non-woven fabrics PUR laminating is carried out stacked compound successively and is obtained fillter section.
(2) prepared fillter section and two sections of acetate fiber sections are combined, two sections of acetate fiber sections lay respectively at the both sides of fillter section, obtain the cigarette filter of three-stage structure.
Embodiment 4
The present embodiment provides a kind of cigarette filter and preparation method thereof, and preparation process is as follows:
(1) be 10mm by thickness, grammes per square metre is 180g/m
2porous PET support, thickness is 0.6mm, resistance 6Pa, 30g/m
2electret PP melt spraying non-woven fabrics, thickness is the micropore PET film of 40 μm, and thickness is 0.9mm, 100g/m
2pET skeleton non-woven fabrics hot pressing mode carries out stacked compound successively and obtains fillter section.
(2) prepared fillter section and two sections of acetate fiber sections are combined, two sections of acetate fiber sections lay respectively at the both sides of fillter section, obtain the cigarette filter of three-stage structure.
Embodiment 5
The present embodiment provides a kind of cigarette filter and preparation method thereof, and preparation process is as follows:
(1) be 10mm by thickness, grammes per square metre is 180g/m
2porous PET support, thickness is the micropore PET film of 40 μm, and thickness is 0.6mm, resistance 6Pa, 30g/m
2electret PP melt spraying non-woven fabrics, thickness is 0.9mm, 100g/m
2pET skeleton non-woven fabrics hot pressing mode carries out stacked compound successively and obtains fillter section.
(2) prepared fillter section and two sections of acetate fiber sections are combined, two sections of acetate fiber sections lay respectively at the both sides of fillter section, obtain the cigarette filter of three-stage structure.
Cigarette containing the cigarette filter prepared by embodiment 1-5 is tested, and makes reference with certain brand cigarette, the Tar reduction of cigarette of test containing cigarette filter of the present invention, draw resistance and often prop up the recruitment of cigarette combustion required time.
Table 1 cigarette performance test results
Cigarette performance test results shows, and adopt the cigarette of cigarette filter of the present invention, its tar reduced rate reaches about 40%, effectively reduces tar transit dose, and resistance recruitment almost can be ignored.But after exchanging the lamination order of micropore PET film and electret PP melt spraying non-woven fabrics, tar reduced rate decreases and resistance recruitment increases to some extent, illustrates that the lamination order of the composite of the fillter section of cigarette filter has a certain impact to its filter effect.
Adopt cigarette filter of the present invention, greatly reduce tar and contact with the direct of cigarette smoker, there is very large actual application value.
Be only preferred embodiment of the present invention in sum, be not used for limiting practical range of the present invention, the present invention does not address part and is applicable to prior art.