CN105200603A - Aromatic polyamide fiber chenille yarn - Google Patents

Abstract

The invention discloses an aromatic polyamide fiber chenille yarn, which comprises two parts: a core thread and a feather yarn. Glass fiber, aluminum silicate fiber, polyamideimide fiber, polyether ether ketone fiber, polyphenylene sulfide fiber, polysulfone-based amide fiber, polyparaphenylene benzobisoxazole fiber, polybenzimidazole fiber, A mixed yarn of one or more of polytetrafluoroethylene fiber, polyimide fiber, and aramid fiber; the core wire is two strands, and the feather yarn is sandwiched between the two core wires after the core wire is twisted . The invention has the following advantages: aramid fiber is a kind of pure inorganic fiber, which has high temperature resistance, high strength, good heat dissipation and air permeability, mildew and moth resistance, no static electricity, and unique ability to inhibit bacterial growth and efficiently block ultraviolet rays. transparent characteristics.

Description

A kind of aramid fiber chenille yarn

technical field

The patent of the present invention relates to a yarn for air purification, in particular to an aramid fiber chenille yarn.

Background technique

The core thread of the chenille yarn in the prior art is twisted with acrylic yarn as a raw material, and the feather yarn is cut into short feathers with viscose yarn as a raw material, which are widely used in the fields of home textiles and knitted garments. The fabric that adopts common chenille yarn to weave generally gets its decorative effect more, and its comfortableness aspect is relatively poor. Rarely used for air filtration purposes.

After China experienced the "soot-type pollution" brought about by the industrial revolution in the 18th century and the "photochemical smog pollution" brought about by the petroleum and automobile industries in the 19th century, modern people are experiencing "severe PM2.5-type smog" with Chinese characteristics. The third pollution period marked by "smog air pollution". Now people's living environment is getting worse and worse. The endless industrial exhaust gas and the ubiquitous automobile exhaust have led to increasingly serious air pollution. Hazy weather and PM2.5 have warned people of the serious impact of air pollution. The process of industrialization has increasingly stringent requirements for air filters, such as clean workshops, clean workshops, laboratories, and clean rooms for medical, hygiene, food, chemical, and electronics, or dust-proof for electronic, mechanical, and communication equipment.

Air filters are generally divided into primary-efficiency air filters, medium-efficiency air filters, high-efficiency air filters, and sub-high-efficiency air filters. Filter materials include non-woven fabrics, nylon mesh, activated carbon filter cotton, metal hole mesh, etc., and protective meshes include double-sided plastic-sprayed wire mesh and double-sided galvanized wire mesh. Inexpensive, light in weight, good in versatility and compact in structure. The selection of filter materials generally takes into account the resistance and use of the air filter to prevent airborne particles from affecting the clean area and ensure the service life of the filter.

Airborne particulate matter removal technologies mainly include mechanical filtration, adsorption, electrostatic dust removal, anion and plasma methods, and electrostatic electret filtration. Mechanical filtration generally captures particles through the following three methods: direct interception, inertial collision, and Brownian diffusion mechanism. It has a good collection effect on fine particles but has a large wind resistance. In order to obtain high purification efficiency, the filter element needs to be dense and replaced regularly. Adsorption is to use the large surface area and porous structure of the material to capture particle pollutants, which are easy to block, and the effect of removing gas pollutants is more significant; electrostatic dust removal is to use a high-voltage electrostatic field to ionize the gas so that the dust particles are charged and adsorbed to the electrode. The dust method, although its wind resistance is small, has a poor effect on the collection of larger particles and fibers, which will cause discharge, and the cleaning is troublesome and time-consuming, and it is easy to generate ozone and form secondary pollution. Negative ions and plasma methods work similarly to remove indoor particulate pollutants. They both charge the particulates in the air and coalesce to form larger particles that settle. However, the particulates are not actually removed, but only attached to nearby surfaces. , easily lead to dust again. Electrostatic electret filtration is represented by 3M "high-efficiency electrostatic air filter", which adopts breakthrough permanent electrostatic filter material to effectively block particulate pollutants larger than 0.1 micron in the air, such as dust, dander, pollen, bacteria, etc. Low impedance ensures the stable operation and cooling effect of the air conditioner. In addition, the deep dust holding design ensures a longer service life. It is widely used in home and car air conditioners (such as SAIC, Volkswagen, GM and other well-known brand best-selling models) and some commercial buildings (such as Bird's Nest, Beijing Hotel, Capital Airport Phase III). Conventional standard filter media are very effective at removing particles above 10 microns. When the particle size of the particles is reduced to the range of 5 microns, 2 microns or even sub-microns, the high-efficiency mechanical filtration system will become more expensive, and the wind resistance will increase significantly. Filtered by electrostatic electret air filter material, it can achieve high capture efficiency with low energy consumption, and at the same time has the advantages of low wind resistance of electrostatic dust removal, but it does not need to connect tens of thousands of volts, so it will not generate ozone, and because Its composition is made of polypropylene, which is easy to dispose of. This type of filter material is more useful for low-temperature polluted air. Due to the limitation of the fiber material itself, this type of material cannot be used in a polluted air environment higher than 130 degrees.

Polyester needle felt is a filter material with advanced functions and high-efficiency materials. Generally, the temperature of the flue gas is not higher than 150°C, and flexible filter materials such as polyester needle-punched non-woven fabrics can be used, but the industrial temperature is higher than 150°C, such as chemical industry, carbon black tail gas, ironmaking blast furnace gas, and cement plant vertical cellar tail gas , Calcium carbide factory pit furnace exhaust gas, foundry, steelmaking flue gas, asphalt concrete mixing asphalt flue gas, coking flue gas, smelting flue gas, etc., use aramid fiber filter bags. One is that these flue gas dusts are not suitable for ESP collection due to the limitation of specific resistance, and can only be collected by cloth bags; second, if the temperature of the dust-laden flue gas needs to be lowered below 150°C, the investment is high or limited by the site; The third is because the temperature of the dust flue gas contains sulfur components and has an acid dew point, and the dust-containing flue gas can only be filtered and separated at a higher temperature above the acid dew point.

Glass fiber needle felt can be widely used in high temperature flue gas filtration of chemical industry, steel, metallurgy, carbon black, power generation, cement and other industrial furnaces. It is suitable for various bag-type dust collectors such as pulse cleaning and relatively high-speed back-blowing dust cleaning. Glass fiber needle felt is a high temperature resistant filter material with reasonable structure and good performance. It not only has the advantages of high temperature resistance, corrosion resistance, stable size, extremely small elongation and shrinkage, and high strength of glass fiber fabrics, but also has a single-fiber, three-dimensional microporous structure, high porosity, and low resistance to gas filtration. It is a high-speed, high-efficiency high-temperature filter material. Compared with other high temperature resistant chemical fiber felts, it has special advantages such as low price and higher temperature resistance. However, its running resistance is higher than that of ordinary chemical fiber high-temperature filter materials, and its filtration accuracy is slightly lower.

For high-temperature polluted air, "microporous thin composite filter material" is currently the most practical air filter material in specific environments. "Microporous thin composite filter material" is made of polytetrafluoroethylene as a raw material, which is expanded into a microporous film, and this film is compounded on various fabrics or paper substrates by a special process. It has become a new type of "microporous thin composite filter material". This is an ideal filter material, which has the inherent properties of PTFE, excellent chemical stability, extremely smooth surface, extremely low friction coefficient, high and low temperature resistance, no aging, and durable consumer goods. And it is also microporous, breathable and hydrophobic. However, due to the problems of the material itself, this kind of filter material has huge air resistance and high price, which limits its popularization and application.

Contents of the invention

Aiming at the problems existing in the prior art, the invention provides an aramid fiber chenille yarn, which has both high-temperature air filtration and purification performance and decorative properties.

In order to realize the above-mentioned purpose of the invention, the present invention adopts the following technical solutions:

A kind of aromatic polyamide fiber chenille yarn, comprises core thread and feather yarn two parts, and the material of described feather yarn is aramid fiber or aromatic polyamide fiber and quartz glass fiber, high silica glass fiber, silicon Alumina fiber, polyamideimide fiber, polyether ether ketone fiber, polyphenylene sulfide fiber, polysulfone amide fiber, polyparaphenylene benzobisoxazole fiber, polybenzimidazole fiber, polytetrafluoroethylene Fiber, polyimide fiber, aramid fiber or one or more mixed yarns; the core wire is two strands, and the feather yarn is sandwiched between the two core wires after the core wire is twisted.

The material of the core wire is quartz glass fiber, high silica glass fiber, aluminum silicate fiber, polyamideimide fiber, polyether ether ketone fiber, polyphenylene sulfide fiber, polysulfone-based amide fiber, polyparaphenylene A mixture of one or more of benzobisoxazole fibers, polybenzimidazole fibers, polytetrafluoroethylene fibers, polyimide fibers, aramid fibers and basalt fibers.

The cross-section of the single fiber of the core wire is circular, star-shaped, or segmental-orange-shaped.

The core wire is made of aramid fiber.

The surface of the feather yarn and/or the core wire is coated with thermoplastic and thermosetting melt glue.

The fineness of the core wire is 0.01-100Nm.

The fineness of the feather yarn is 0.01-100Nm.

The twist degree of the core wire is 10-1000 twists/meter.

The axial density of the feather yarns is 10-10000/cm.

Compared with the prior art, the present invention has the following advantages: ① Aramid fiber is a pure inorganic fiber, which has high temperature resistance, high strength, good heat dissipation and air permeability, mildew and moth resistance, no static electricity, and unique The characteristics of inhibiting bacterial growth and effectively blocking ultraviolet penetration; ②Aramid fiber fibers act as feather yarns to make aramid fiber chenille yarns with uniform dryness, good spinnability, and soft hand feeling. The velvet fabric and decorative fabric made of it are flame retardant and have good air permeability; ③Compared with the needle punched filter cloth and filter bag of the same density, it is light in weight, high in filtration efficiency and low in resistance. Air filter materials made of raw materials are unmatched.

Detailed ways

Example 1

The aramid fiber chenille yarn of the present embodiment comprises two parts of a core thread and a feather yarn, the material of the feather yarn is aramid fiber, and the fineness of the feather yarn is 21Nm; the core thread is two strands The fineness of each strand is 24Nm. The material of the core wire is aramid fiber. After the core wire is twisted, the feather yarn is sandwiched between the two core wires. The twisting twist of the core wire is 590 twists/meter. The axial density of the feather yarn is 390/cm.

In this embodiment, the surface of the core wire is coated with a coating of thermosetting polyimide melt adhesive.

Example 2

The present embodiment aramid fiber chenille yarn comprises core thread and feather yarn two parts, and the material of feather yarn is 100Nm aramid fiber yarn; Core thread is two 0.01Nm aramid fiber strands, core Add 10 twists/meter to the thread and sandwich 10000/cm feather yarn between two core threads.

In this embodiment, the surface of the core wire is coated with a coating of thermoplastic polyethylene melt.

Example 3

The present embodiment aromatic polyamide fiber chenille yarn comprises core thread and feather yarn two parts, and the material of feather yarn is 100Nm aramid fiber yarn; Core thread is two 100Nm aromatic polyamide fiber strands, and core thread Add 1000 twist/meter to clamp 10000/cm feather yarn between two core wires.

The surface of the core wire in this embodiment is coated with a thermoplastic polypropylene melt adhesive coating.

Example 4

The aramid fiber chenille yarn of this embodiment comprises two parts of a core thread and a feather yarn, and the material of the feather yarn is a mixed yarn of aramid fiber, high silica glass fiber and aluminum silicate fiber. The fineness of the wire is 10Nm, and the fineness of the core wire is 5Nm. The core wire is two strands composed of polysulfone-based amide fiber and poly-p-phenylene benzobisoxazole fiber. After the core wire is twisted, the The feather yarn is sandwiched between two core wires, the twisting degree of the core wire is 600 twists/meter, and the axial density of the feather yarn is 800 strands/cm.

In this embodiment, the surfaces of the core wire and the feather yarn are coated with a coating of thermosetting polyimide melt adhesive.

Example 5

The aramid fiber chenille yarn of this embodiment comprises two parts of a core thread and a feather yarn, and the material of the feather yarn is a mixed yarn composed of aramid fiber and polytetrafluoroethylene fiber, and the fineness of the mixed yarn is It is 0.01Nm, and the fineness of described core wire is 0.01Nm, and this core wire is two poly-p-phenylene benzobisoxazole fiber strands, and the cross section of this core wire is circular, and after the core wire is twisted, feather yarn Sandwiched between two core wires, the twisting degree of the core wire is 10 twists/m, and the axial density of the feather yarn is 10 strands/cm.

In this embodiment, the surfaces of the core wire and the feather yarn are coated with a coating of thermosetting polyimide melt adhesive.

In addition, it should be noted that those skilled in the technical field to which the patent of the present invention belongs can make various modifications or supplements to the described specific embodiments or replace them in similar ways, as long as they do not deviate from the structure of the patent of the present invention or exceed The scope defined in the claims shall belong to the protection scope of the patent of the present invention.

Claims (9)

1. an aramid fibre chenille yarn, comprise heart yearn and camlet two parts, it is characterized in that: the material of described camlet is one or more the mixed yarn in aramid fibre or aramid fibre and quartz glass fibre, resurrection glass fibre, alumina silicate fibre, polyamide-imide fiber, polyetheretherketonefiber fiber, polyphenylene sulfide fibre, polysulfones base nylon, polyparaphenylene's benzo-dioxazole fiber, polybenzimidazole fiber, polytetrafluoroethylene fibre, polyimide fiber, aramid fiber; Described heart yearn is two strands, is clipped in the middle of two heart yearns by camlet after heart yearn twisting.

2. aramid fibre chenille yarn according to claim 1, is characterized in that: the material of described heart yearn is one or more the mixing in quartz glass fibre, resurrection glass fibre, alumina silicate fibre, polyamide-imide fiber, polyetheretherketonefiber fiber, polyphenylene sulfide fibre, polysulfones base nylon, polyparaphenylene's benzo-dioxazole fiber, polybenzimidazole fiber, polytetrafluoroethylene fibre, polyimide fiber, aramid fiber and basalt fibre.

3. aramid fibre chenille yarn according to claim 1, is characterized in that: the filament cross section of described heart yearn is circle, star, tangerine lobe shape.

4. aramid fibre chenille yarn according to claim 1, is characterized in that: the material of described heart yearn is aramid fibre.

5. aramid fibre chenille yarn according to claim 1, is characterized in that: the surface of described camlet and/or heart yearn has the coating of thermoplasticity, thermosetting melten gel.

6. aramid fibre chenille yarn according to claim 1, is characterized in that: the fineness of described heart yearn is 0.01-100Nm.

7. aramid fibre chenille yarn according to claim 1, is characterized in that: the fineness of described camlet is 0.01-100Nm.

8. aramid fibre chenille yarn according to claim 1, is characterized in that: the twisting twist of described heart yearn is 10-1000 twist/m.

9., according to the arbitrary described aramid fibre chenille yarn of claim 1-8, it is characterized in that: the axial density of described camlet is 10-10000 root/cm.