阅读说明：本技术 非织造无胶棉过滤材料及其制备方法 (Non-woven non-collodion cotton filter material and preparation method thereof ) 是由 潘跃进 姜晓烽 徐洪海 于 2019-08-15 设计创作，主要内容包括：一种非织造无胶棉过滤材料,包括：高熔点阻燃涤纶短纤维和低熔点阻燃涤纶短纤维；其中,所述高熔点阻燃涤纶短纤维与所述低熔点阻燃涤纶短纤维混合质量百分比比例为(30～90％)：(10～70％)。(A nonwoven non-collodion filter material comprising: high-melting-point flame-retardant polyester staple fibers and low-melting-point flame-retardant polyester staple fibers; the flame-retardant polyester staple fiber with the high melting point and the flame-retardant polyester staple fiber with the low melting point are mixed according to the mass percentage ratio of (30-90%): (10-70%).)

1. A nonwoven non-collodion filter material, wherein the nonwoven non-collodion filter material comprises: high-melting-point flame-retardant polyester staple fibers and low-melting-point flame-retardant polyester staple fibers; the flame-retardant polyester staple fiber with the high melting point and the flame-retardant polyester staple fiber with the low melting point are mixed according to the mass percentage ratio of (30-90%): (10-70%).

2. The non-woven non-collodion cotton filter material of claim 1, wherein the high-melting-point flame-retardant polyester staple fiber has a melting point temperature of 245-255 ℃.

3. The non-woven non-collodion cotton filter material of claim 1, wherein the low-melting flame-retardant polyester staple fiber has a melting point temperature of 105-115 ℃.

4. The non-woven non-collodion cotton filter material of claim 1, wherein the fiber fineness of the high-melting-point flame-retardant polyester staple fiber is 0.9-18D; the fiber fineness of the low-melting-point flame-retardant polyester staple fiber is 1.5-12D.

5. The non-woven non-collodion filter material of claim 4, wherein the high-melting flame-retardant polyester staple fibers have a fiber fineness of 0.9D, 5D, 12D, 15D, 18D, each 20%.

6. The non-woven non-collodion filter material of claim 4, wherein the low-melting flame-retardant polyester staple fibers have a fiber fineness of 1.5D, 3D, 6D, 10D, 12D, each 20%.

7. The non-woven non-collodion cotton filter material of claim 1, wherein the cross-section of the high-melting-point flame-retardant polyester staple fiber and the cross-section of the low-melting-point flame-retardant polyester staple fiber are shaped as a special hollow.

8. The nonwoven collodion-free filtration material of claim 7, wherein the cross-section of the fibers of the high-melting-point flame-retardant polyester staple fibers and the cross-section of the fibers of the low-melting-point flame-retardant polyester staple fibers are square, circular or triangular.

9. A method of making the nonwoven non-collodion filter of claim 1, comprising:

mixing raw materials: the high-melting-point flame-retardant polyester staple fiber and the low-melting-point flame-retardant polyester staple fiber are mixed according to the mass percentage ratio of (30-90%): (10-70%) are uniformly mixed;

obtaining the non-glue cotton: opening, carding and lapping the mixed raw materials, and then carrying out hot melting and shaping to obtain non-collodion cotton; wherein the temperature of hot melt shaping is 185-210 ℃; and the number of the first and second groups,

hot-melt spraying finishing: uniformly spraying a three-proofing finishing agent on the non-collodion cotton according to the mass percentage of 3-10%, and then baking and shaping to obtain the non-woven non-collodion cotton filtering material; wherein the baking and shaping temperature is 150-180 ℃.

10. The method of claim 11, wherein the melting point temperature of the high-melting-point flame-retardant polyester staple fiber is 245-255 ℃; the melting point temperature of the low-melting-point flame-retardant polyester staple fiber is 105-115 ℃.

Technical Field

The invention relates to the field of preparation of filter materials, in particular to a non-woven non-collodion filter material and a preparation method thereof.

Background

With the enhancement of environmental protection consciousness all over the world, various enterprises in China continuously develop new and more effective environmental protection materials. Wherein the filtration efficiency and the service life of the filter material are of the greatest concern for the respective manufacturer and user.

Nonwoven fabrics are currently not only used in more filtration applications, but also differ in product properties. The wet-process non-woven fabric is commonly used in the field of filtration of liquid, automobiles and the like, has better filtration efficiency and dust holding capacity, is beneficial to adding some functional fibers with high melting point and high temperature resistance, such as aramid, in the production process, can be used in special filtration environments, but has lower strength and stronger texture.

The needle-punched non-woven fabric is a filter material which is most popular in the field of filtering air dust and the like at present, has excellent dust holding capacity and better strength, can be directly prepared from polyimide, aromatic polyamide, polyphenylene sulfide, inorganic fiber and the like, has wide processing adaptability, but can only present a general better level on the filtering efficiency because the needle-punched process mainly adopts carding web formation and is difficult to adopt structural characteristics and specific factors determined by superfine fiber processing and consolidation modes below 1d, and after finishing or compositing is needed to improve the efficiency.

The non-woven fabric of the spray melting method is one of materials with the finest fibers (generally 1-4 mu m) in the non-woven fabric and uniform net formation, and has high shielding performance and filtering performance on tiny dust and bacteria. The higher quality melt-blown material can reach 97% -99% of the filtration efficiency of 0.3um dust, only has poor strength, and is difficult to be used alone in occasions with larger external force.

The spunbonded nonwoven fabric has superior strength performance compared with any other nonwoven fabric, even is close to woven fabric, has inferior net forming uniformity compared with other products, has a structure close to a two-dimensional state, and therefore, has poor filtering effect and dust holding capacity.

Therefore, there is a need for a new nonwoven non-collodion filter material and method of manufacture that overcomes the above-mentioned deficiencies.

Disclosure of Invention

The invention aims to provide a novel non-woven non-collodion cotton filter material with economic, flame-retardant, waterproof, oil-repellent, soil-release and other functions and a manufacturing method thereof.

In order to achieve the above object, according to an aspect of the present invention, there is provided a nonwoven non-collodion filter material comprising: high-melting-point flame-retardant polyester staple fibers and low-melting-point flame-retardant polyester staple fibers; the flame-retardant polyester staple fiber with the high melting point and the flame-retardant polyester staple fiber with the low melting point are mixed according to the mass percentage ratio of (30-90%): (10-70%).

In one embodiment of the invention, the melting point temperature of the high-melting-point flame-retardant polyester staple fiber is 245-255 ℃.

In one embodiment of the invention, the melting point temperature of the low-melting-point flame-retardant polyester staple fiber is 105-115 ℃.

In one embodiment of the invention, the fiber fineness of the high-melting-point flame-retardant polyester staple fiber is 0.9-18D; the fiber fineness of the low-melting-point flame-retardant polyester staple fiber is 1.5-12D.

In one embodiment of the invention, the fiber fineness of the high-melting-point flame-retardant polyester staple fiber is 0.9D, 5D, 12D, 15D and 18D, and 20% of each fiber fineness is adopted. That is, in the high melting point flame retardant polyester staple fibers, fibers having fiber finenesses of 0.9D, 5D, 12D, 15D, and 18D each account for 20% of the total amount of the high melting point flame retardant polyester staple fibers.

In one embodiment of the invention, the fiber fineness of the low-melting-point flame-retardant polyester staple fiber is 1.5D, 3D, 6D, 10D and 12D, and each fiber fineness is 20%. That is, in the low melting point flame retardant polyester staple fiber, the fibers having the fiber fineness of 1.5D, 3D, 6D, 10D, 12D each account for 20% of the total amount of the low melting point flame retardant polyester staple fiber.

In an embodiment of the present invention, the cross-sections of the high melting point flame-retardant polyester staple fiber and the low melting point flame-retardant polyester staple fiber are shaped as a special hollow.

In an embodiment of the present invention, the cross-sections of the high melting point flame-retardant polyester staple fiber and the low melting point flame-retardant polyester staple fiber are square, circular or triangular.

According to another aspect of the present invention, there is provided a method of making the above nonwoven non-collodion filter material, comprising:

mixing raw materials: the high-melting-point flame-retardant polyester staple fiber and the low-melting-point flame-retardant polyester staple fiber are mixed according to the mass percentage ratio of (30-90%): (10-70%) are uniformly mixed;

obtaining the non-glue cotton: opening, carding and lapping the mixed raw materials, and then carrying out hot melting and shaping to obtain non-collodion cotton; wherein the temperature of hot melt shaping is 185-210 ℃; and the number of the first and second groups,

hot-melt spraying finishing: uniformly spraying a three-proofing finishing agent on the non-collodion cotton according to the mass percentage of 3-10%, and then baking and shaping to obtain the non-woven non-collodion cotton filtering material; wherein the baking and shaping temperature is 150-180 ℃.

In one embodiment of the invention, the melting point temperature of the high-melting-point flame-retardant polyester staple fiber is 245-255 ℃; the melting point temperature of the low-melting-point flame-retardant polyester staple fiber is 105-115 ℃.

It will be understood by those skilled in the art that each of the reagents described herein is commercially available, unless otherwise specified. For example, the high-melting-point flame-retardant polyester staple fiber and the low-melting-point flame-retardant polyester staple fiber used in the invention are sold and can be obtained through the following methods: the flame-retardant polyester chips prepared by copolycondensation reaction of phosphorus-based copolymerization flame retardants, purified terephthalic acid and ethylene glycol are prepared into high-melting-point flame-retardant polyester staple fibers and low-melting-point flame-retardant polyester staple fibers by a chemical fiber spinning process. The raw material is characterized in that the flame-retardant group segments are polymerized on a fiber molecular chain, the flame-retardant fiber is different from post-finishing type flame-retardant fibers, is not afraid of washing, has permanent and stable flame-retardant function, is nontoxic and odorless, does not generate toxic or harmful gas during combustion, and does not cause environmental pollution. In addition, the three-proofing finishing agent is a conventional agent known in the field, and any finishing agent capable of enabling the fibers to have the functions of flame retardance, water resistance, oil resistance and the like is a suitable three-proofing finishing agent.

Because the non-woven non-collodion cotton filter material of the invention adopts two kinds of fibers with different melting points, in the preparation method of the invention, the low-melting-point flame-retardant polyester staple fiber is firstly melted in the step of obtaining the non-collodion cotton and is completely melted or integrated with the high-melting-point flame-retardant polyester staple fiber. Therefore, the preparation method of the invention completely does not need glue adhesion and has no formaldehyde.

The invention provides a non-glue filter cotton prepared from flame-retardant polyester staple fibers with different melting points by a non-woven non-glue hot melting process, and the obtained non-glue filter cotton has a good flame-retardant function, is stable and durable in flame-retardant performance and reaches the standard of national standard (GB/T17591-2006). Therefore, the non-collodion cotton filter material has the advantages of no formaldehyde, no peculiar smell, no toxicity and the like, and is safe and environment-friendly to use. Meanwhile, the three-proofing finishing agent is utilized to enable the filtering material to have the functions of water resistance, oil repellency, easy decontamination and the like, the surface cleanliness of the material can be effectively improved, stains are reduced, the ventilation and air permeability are good, the filtering material is easy to clean and durable, and the service life of the product is greatly prolonged. Therefore, the filter material has wide application, and can be used as a primary air filter material for household appliances, chemical industry, medicine, food, grain and oil, and vehicles such as airplanes, trains, motor cars and high-speed rails.

Detailed Description

Hereinafter, the technique of the present invention will be described in detail with reference to specific embodiments. It should be understood that the following detailed description is only for the purpose of assisting those skilled in the art in understanding the present invention, and is not intended to limit the present invention.