TW449549B - Method for producing static-carrying composite nonwoven cloth - Google Patents

Abstract

The present invention provides a method for producing a static-carrying composite nonwoven cloth, which comprises using a fibrous nonwoven cloth, that has or has not been subjected to a degreasing treatment, particularly a nonwoven cloth made of staple fibers or meltblown fibers, as a raw material; and performing the steps of lamination, needle pressing, static-carrying, etc. Alternatively, a meltblown nonwoven cloth can be added in the needle pressing process of a nonwoven cloth for lamination, or a polymer is meltblown into a fiber and sprayed on a needle pressed nonwoven cloth of staple fibers that has been subjected to degreasing treatment, in order to make the two nonwoven clothes into a composite. The static-carrying composite nonwoven cloth according to the present invention has a good filtration effect and can be used for air filtration.

Description

4495 II > V. Description of the invention (1) Since the non-woven fabric with static electricity can use its electrostatic property to adsorb particles in the air ... 'In recent years, the non-woven fabric with static electricity has been widely used for air filtration. In the Republic of China Patent No. 297062, a partially or totally denatured non-polar polymer film is opened to make a nonwoven fabric. Since the modified polymer is used for this purpose, it is not easy to obtain raw materials. In the Republic of China Patent No. 3 1 1096, "the use of a scrim to reinforce a non-woven fabric with static electricity" is to superimpose the reinforced fabric with an electrostatic nonwoven fabric and then needle-roll. Reinforcement fabrics are also not easily available. In U.S. Patent No. 5,350,620 ', a composite fiber web is formed of unblown meltblown fibers and charged short fibers simultaneously. The actual process is not easy to control. In addition, the biggest problem of traditionally using needle-rolled non-woven fabrics to make non-woven fabrics with electrostatic air filtration is that the fibers themselves contain oil agents, so during the process of static electricity, the charged charge cannot be improved, so the filtration efficiency is low, and it cannot meet the actual needs. Filtration efficiency. Therefore, an object of the present invention is to provide a method for manufacturing a composite non-woven fabric with static electricity by making it easy to obtain raw materials and simple in order to solve the above-mentioned problems. The obtained composite nonwoven has the advantages of stable quality and good filtering effect. In order to achieve the purpose of the present invention, the present invention uses a non-degreased or non-degreased fibrous nonwoven fabric and a spray-blown nonwoven fabric as raw materials to obtain a composite static-charged composite nonwoven fabric through the steps of lamination, needle rolling, and static electricity. According to the first feature of the present invention, a composite non-woven fabric

4 4 9 5 4 V. Description of the invention ¢ 2) The method includes: (a) laminating the fiber-removed or non-oil-removed fibrous non-woven fabric and the meltblown non-woven fabric with each other; (b) laminating the laminated non-woven fabric with a needle Rolling composite treatment; and (c) electrifying the non-woven fabric after needle rolling composite treatment, wherein the meltblown nonwoven fabric may be static or non-static, when the meltblown nonwoven fabric or the fiber nonwoven fabric which has been degreased or not degreased When it is charged, step (c) can be omitted. According to a second feature of the present invention, a method for manufacturing a static-charged composite nonwoven fabric includes: (a) carding and laminating fibers to form a cotton web; (b) meltblown nonwoven fabric and the cotton web obtained in step (a) Laminate together, and then perform needle-rolling composite treatment; and (c) electrify the non-woven fabric after needle-rolling composite treatment, where the meltblown nonwoven can be static or non-static, and can be omitted when the meltblown nonwoven is static. Step (c). According to a third feature of the present invention, a method for manufacturing a composite non-woven fabric with static electricity includes: (a) forming a polymer into fibers by melt-blown and spraying on a non-degreasing or non-degreasing fiber non-woven fabric, and directly forming a double Layer non-woven fabric; (b) needle-rolled double-layer non-woven fabric; and (c) electrify the non-woven fabric after needle-rolling. When the fiber non-woven fabric that has been degreased or not degreased is charged with static electricity, step (c) may be omitted. .

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V. Description of the invention (3) Since the fiber nonwoven fabric is not easy to be charged with static electricity, the present invention contemplates using a melt-blown nonwoven fabric and a fiber nonwoven fabric that are easily charged together to solve the problem of non-chargeability. '' The fibrous nonwoven fabric that can be used in the present invention can be a needle-punched nonwoven fabric, a spun nonwoven fabric, a hot-air cotton nonwoven fabric, or a spunbonded nonwoven fabric. The fiber nonwoven fabric is preferably a short fiber nonwoven fabric 'having a fiber fineness of 0.5 to 15 denier, and more preferably j 6 denier. In order to make the effect more effective, the example is easier to charge. For example, according to the cloth and the fused book, the non-woven degreased or non-clothed charge is not used in order to get more raped and degreased. The concept of making the non-woven fabric to make the non-woven fiber non-woven is based on the concept of degreasing or non-overlapping. When the composite is made of the non-woven fabric, the method of spraying bright mouth on degreasing or non-woven is the three methods. Yes ’will be directly laminated after degreasing, and further, because the fiber of the non-woven fabric itself may be subjected to a subsequent electrostatic treatment, the composite non-woven fabric is improved, resulting in poor filtering effect. Therefore, the non-woven fabric used in the present invention is preferably treated with a non-ionic surfactant in advance and also charged. According to the present invention, it can be treated with electric seals such as using a high voltage corona of 10 to 50 kV. : The present invention uses non-degreased or non-degreased non-woven fabric as the raw material, and combines the two together. It is implemented in three ways. The first method is a type in which the processed fiber nonwoven fabric and meltblown nonwoven fabric are directly made of nonwoven fabric. The second way is to add a fusion nozzle non-woven fabric to the fiber. The third formula :: composite material is melt-blown to form the i-dimensional :: woven fabric. The following is a detailed description of a method for manufacturing a composite non-woven fabric with static electricity.

^ 4 ^ 549 V. Description of the Invention (4) ~-Perform needle rolling 'to fully combine the two types of non-woven fabrics. Next, the composite nonwoven fabric is further subjected to a charging treatment such as corona to charge the composite nonwoven fabric. As the raw material, the meltblown non-woven fabric can be charged with static electricity or without static electricity. After being degreased, the fiber non-woven fabric without degreasing treatment can also be charged in advance. If one of the raw materials is charged, that is, if the melt-blown nonwoven is electrostatically charged or the fiber nonwoven has been charged, the last principle of the composite nonwoven may be omitted. & According to the present invention, the second method for manufacturing a composite non-woven fabric with static electricity is to form a cotton web by carding and stacking fibers. Next, the melt-blown nonwoven fabric was laminated with the obtained cotton web, and then needle-rolled. Finally, the composite nonwoven fabric is further subjected to a charging treatment such as corona to charge the composite nonwoven fabric. _ $ 样 地 ’meltblown nonwoven fabric can be static or static = ° When the meltblown nonwoven is electrostatically charged, the final step of charging the composite nonwoven can be omitted. According to the present invention, a degreasing or non-woven fabric is sprayed as a glare spray. It will then be charged. The third method of manufacturing a polymer non-woven fiber non-woven fabric with an electrostatic nonwoven fabric is a needle-rolled composite nonwoven fabric which is melt-blown and directly formed into a fiber. Finally, the composite nonwoven fabric is similarly used as The original coarse woven fabric can be pre-charged with a degreasing or non-degreasing fiber non-woven fabric charging step. In this case, the composite is finally omitted. Fiber used in the present invention The fiber woven fabric used in the present invention can be made by a carding method. Polyolefin fiber, polyester fiber, polyamide fiber

4495 4 ^ V. Description of the invention (5) dimension, or a mixture thereof. Specific examples are polyethylene fibers and polypropylene fibers. The melt-blown nonwoven fabric used in the present invention may be made of polyolefin fibers, polyester fibers, polyurethane fibers, or a mixture of fibers thereof. Specific examples may be made of polyethylene fibers or polypropylene fibers. . The fiber diameter of the solution-blown non-woven fabric may be 10 micrometers. The basis weight may be 5-30 g / m2, preferably 10-20 g / m2 or less. The present invention will be described with examples to illustrate the methods, features, and advantages of the present invention. 'But it is not intended to limit the scope of the present invention, and the scope of the present invention shall be subject to the scope of patent applications appended later. The needle-punched nonwoven fabric used in the following examples is a short-fiber needle-punched nonwoven fabric with a basis weight of 100 g / m2. Polypropylene staple fibers (purchased from Fuju Company) with a length of 50 mm and a fineness of 3 deniers were used. The melt-blown nonwoven fabric with static electricity used is polypropylene melt-blown nonwoven fabric. The method of charging static electricity is to use a corona discharge device to make the non-woven fabric with a permanent electrostatic charge at a voltage of 30 KV. Example 1 A short-fiber needle-rolled non-woven fabric and a spray-weave nonwoven fabric with a basis weight of 10 g / m2 (fiber fineness of 1.5 to 3 # m) were laminated together, and then tangled and compounded by a needle rolling mill. The needle rolling density was 200 needles / cm2 with a porosity of 94%. The obtained composite nonwoven fabric was subjected to a permanent electrostatic charge using a corona discharge device. Example 2 The steps are the same as in Example 1, but the short-fiber needle-rolled nonwoven fabric used was degreased with 2% non-ionic surfactant, and then charged.

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The needle-rolled nonwoven fabric is processed by 2% non-ionic surfactant, and then the treated needle-rolled nonwoven fabric is arranged in a meltblown line to remove the oil from the conveyor belt, and polypropylene raw materials are passed through the meltblown machine to become 1.5 The forming machine of ~ 2 feeds the fibers directly to the needle-rolled nonwoven fabric to form a composite ultra-fine composite nonwoven fabric without M m. The corrugated discharge equipment is used to make the composite nonwoven fabric. Will all the charge. ’Permanent static test method and result of tape The needles that have not been degreased are rolled into a non-woven fabric and degreased. The processed needle-rolled nonwoven fabric, electrostatically-blown meltblown nonwoven fabric, electrostatically-added △, and the composite nonwoven fabric obtained in Examples 1 to 3 were prepared using the following test methods. TSI Co. 8130 Model instrument was used to make the vaporized sodium solution. (The average weight of the particles is 0.26 vm). The flow rate of 5.4 cm / sec was passed through the nonwoven fabric to be tested to measure the filtration efficiency, pressure drop, and thickness of the nonwoven fabric. The results are shown in Table 1. The definition of filtration efficiency and pressure difference is as follows. CB: Concentration of particulates before passing (c / c. C.) CA: Concentration of particulates after passing (c / c, c.) Pressure difference = PA-PB (mmH20)

Pa: Air pressure after filtering PB: Air pressure before filtering

44S V. Description of the invention (7) Table 1 Product filtration efficiency 0) Pressure drop Thickness (_ Needle-rolled nonwoven fabric without degreasing treatment (commercially available) 4% 0.3 1.62 After degreasing and electric treatment Needle-rolled nonwoven fabric 65% 0.3 1.65 Meltblown nonwoven fabric 1 with static electricity (commercially available) 60% 1.0 0.12 Composite nonwoven fabric of Example 1 54% 0.6 1.60 Composite nonwoven fabric of Example 2 85% 0.6 1.62 of Example 3 Composite non-woven fabric 80% 0.4 1.64 From the results in Table 1, it can be seen that the composite non-woven fabric obtained according to the method of the present invention has a fairly good filtration efficiency. As for the pressure difference, it means that the air resistance of the air flow filter material in the filtration is light. Under the filtration efficiency, the smaller the difference, the less energy consumption. U ^ As for the method in Example 3, the polymer raw material was melted into a superfine fiber through a melt blown machine, and the method was directly formed on the needle-rolled nonwoven fabric. The melt-blown nonwoven fabric was directly used in Example 2. Although the basis weight of the composite nonwoven fabric obtained in Example 3 was increased (15 g / m2), the melt-blown nonwoven fabric can be formed into a structure with a σ needle-dried iron fabric. Loose composite structure makes pressure difference Decrease. Although the present invention has been disclosed in the preferred embodiment as above, it also limits the present invention. Anyone skilled in the art will not depart from: the iodine of the invention

Page 10 4495 4 V. Description of the invention (8) Within the scope of God and God, when it can be modified and retouched ', the scope of protection of the present invention shall be determined by the scope of the attached patent application.

Claims (1)

449〇 4 6. Scope of Patent Application: A method for manufacturing a composite non-woven fabric with static electricity includes: (a) superimposing a degreased or non-degreased fibrous non-woven fabric and a solution-blown non-woven fabric on each other; (b) superimposing the Non-woven fabrics are subjected to needle-rolling composite treatment; and (C) electrifying the non-woven fabrics after needle-rolling composite treatment, wherein the meltblown non-woven fabric can be static or non-static. When the non-woven fabric is sprayed or degreased or degreased, When one of the fiber nonwoven fabrics is charged, step (C) may be omitted. 2 · —A method for manufacturing a composite non-woven fabric with static electricity 'includes: (a) Combing and laminating fibers to form a cotton web; (b) Laminating the melt-blown nonwoven fabric with the cotton web obtained in step (a) 'The needle-rolled composite treatment is performed again; and (c) the nonwoven fabric after the needle-rolled composite treatment is charged, wherein the melt-blown nonwoven fabric may be static or non-static, and when the melt-blown nonwoven is static-charged, step (c ). 3. A method of manufacturing a composite non-woven fabric with static electricity, comprising: (a) forming a polymer by melt-blown into fibers and spraying it on a degreased or non-degreased fiber non-woven fabric, and directly forming a double-layer non-woven fabric; (b) Needle-rolled double-layer non-woven fabric; and (c) Charge the non-woven fabric after needle-rolling. When the fiber is not degreased or non-degreased, skip step Cc). In the case of static electricity, the step can be omitted (c 4. The method described in item 1 or 3 of the scope of patent application. The nonwoven fabric is needle-rolled nonwoven fabric, water-rolled nonwoven fabric, and thermal fiber. 6. Scope of patent application Non-woven fabric. 5. The non-woven fabric described in item 1 or 3 of the scope of patent application is short-fiber non-woven fabric. 6. The method according to item 5 of the scope of patent application. The fiber fineness of the non-woven fabric is 0.5 to 15 denier. 7. The fineness of the non-woven fabric according to item 6 of the scope of patent application is 1 to 6 deniers. 8. The method according to item 5 of the scope of patent application, wherein the fiber, wherein the short fiber, wherein the short fiber, wherein the short fiber nonwoven fabric is a short fiber needle-punched nonwoven fabric. Bundle method, in which the fiber 9_ as described in the scope of application for the scope of the patent application i or 3 _ degreasing treatment of non-woven fabric using non-ionic plow interface agent, / 10. The method described in item 2. The fiber non-woven fabric is made of fibers selected from the group consisting of polyolefin fibers, polyester fibers, Λ 'dimension, and mixtures thereof. 11. The method according to claim 10, wherein the fibrous nonwoven fabric is made of polyethylene fibers or polypropylene fibers. 12 'The method according to item 1 or 2 of the scope of patent application, wherein the dazzle mouth nonwoven fabric is made of fibers selected from the group consisting of polyolefin fibers, polyester fibers, polyurethane fibers, and mixtures thereof of. 13. The method according to item 12 of the scope of patent application, wherein the meltblown nonwoven fabric is made of polyethylene fibers or polypropylene fibers. 14. The method according to any one of claims 1 to 3 in the scope of patent application, wherein step (c) is to use a corona treatment to statically charge the nonwoven fabric. '15. The method according to item 14 of the scope of patent application, wherein the corona Page 13 449549 VI. Scope of patent application The treatment is performed by using a corona of 10 to 50 kv. 16. The method according to item 1 or 2 of the scope of patent application, which makes the fiber diameter of the melt-blown nonwoven fabric be 10 microns and the basis weight is 5-30 g / m2. 17. The method according to item 16 of the scope of patent application, wherein the basis weight of the meltblown nonwoven is 10-20 g / m2. Page 14