KR100704383B1 - Tricot permeate channel for reverse osmosis membrane filter - Google Patents

Abstract

The present invention is directed to a reverse osmosis membrane filter made of a thermoplastic cardiac composite fiber using a high melting point resin as a core component and a low melting point resin as a core component so as to secure necessary hardness even without a conventional impregnation process of an epoxy resin. Provided is a tricoat filtrate to be used and a method for producing the same. Through this, the tricot filtration water used in the reverse osmosis membrane filter does not contain harmful components such as amine or bisphenol A, which is very beneficial and has a high filtration efficiency.

Reverse Osmosis Filtration System, Tricot Filtration Furnace, Low Melting Resin, Thermoplastic Echo Composite Fiber

Description

TRICOT PERMEATE CHANNEL FOR REVERSE OSMOSIS MEMBRANE FILTER}

1 is a schematic cross-sectional view of a membrane filter of a reverse osmosis method including a tricot filtration channel.

2 is a schematic cross-sectional view of a thermoplastic cardiac composite fiber used in the tricot filtration channel of the present invention.

3 is a cross-sectional view showing a state before and after heating of the thermoplastic heart sheath composite fiber of the present invention.

<Description of the symbols for the main parts of the drawings>

11: mesh 12: filtration membrane

13: tricot filtration water 14: filtration membrane

20: upper floor

21: deep

The present invention relates to a tricoat filtration channel used in the reverse osmosis membrane filter made of thermoplastic ergot composite fiber, and more particularly to a high melting point resin that can secure the necessary hardness without the impregnation process of epoxy resin The present invention relates to a tricoat filtered water reactor made of a thermoplastic heart sheath composite fiber composed of a core component and a low melting point resin.

The filter used in the reverse osmosis method comprises a mesh 11, filtration membranes 12 and 14, and a tricot filtration water passage 13, as shown in FIG. 1, of which tricot filtration water is purified through a filtration membrane. It will make a space for water to flow out. The fabric tissue line to the tricot filtrate must move the right amount of water without blocking the water between the lines while withstanding the pressure generated during the filter. Thus, the tricot filtrate must have sufficient strength to withstand water pressure. For this reason, the existing tricot filtrate is knitted from a general polyester having a fineness of 30 to 150 deniers using a warp knitted tricot facility, and then impregnated with a thermosetting resin epoxy resin to be processed at a high temperature of 180 ° C. or higher. Has secured its strength. For example, in Korean Patent Application Nos. 1999-8714 and 2000-1493, a tricot fabric was impregnated with an epoxy resin to prepare a filtered water channel. However, epoxy resins have amines and bisphenol A as main components, which are harmful to the human body, and have a disadvantage in that the harmful substances are dissolved when subjected to high temperature after processing. Normally, water input to a water purification facility is not enough to cause serious problems because it is input at room temperature and not at high temperature, but even below the standard value, the harmful components of the human body still remain in purified water.

The present invention has been made to overcome the above-mentioned problems, an object of the present invention is to use a thermoplastic melting vinegar type using a high melting point resin as a core component and a low melting point resin as a primary component without going through the existing epoxy resin impregnation process It is to provide a tricot filtration channel used in the membrane filter of the reverse osmosis method using a composite fiber to minimize the generation of harmful components.

Another object of the present invention is to use a membrane filter of the reverse osmosis method to minimize the generation of harmful components by using a thermoplastic heart sheath composite fiber composed of a high melting point resin as a core component and a low melting point resin as a primary component It is to provide a method for producing tricoat filtered water.

The present invention provides a tricot permeate channel made of a thermoplastic heart sheath composite fiber using a high melting point resin as a core component and a low melting point resin as a core component.

The difference between the melting point of the high melting point resin and the low melting point resin is preferably 30 ~ 100 ℃.

It is preferable that the diameter ratio of the thermoplastic heart sheath composite fiber and the core component is 1: 0.79 to 1: 0.87.

The high melting point resin is any one selected from the group consisting of polypropylene, polyethylene, poly-4-methylpentene, crystalline copolymers of propylene and αolefin, polyethylene terephthalate, polybutylene terephthalate, polyamide and polycarbonate At least one, and the low melting point resin is preferably a low melting point polyester modified by copolymerizing polyethylene terephthalate resin with a single or mixture of nylon, polypropylene.

The tricot filtration water to 150 ~ 200 ℃ the thermoplastic sheath type composite fiber

It is preferably prepared by heating, and the thermoplastic core sheath-type composite fiber is made by combining 25 to 43 parts by weight of the low melting point resin with respect to 100 parts by weight of the high melting point resin.

Using a high melting point resin as a core component and a low melting point resin as a primary component to produce a yarn by complex spinning in a deep sea type method; Shaping the yarn in a warp tricot to produce a fabric; Removing impurities through the prepared fabric through a pretreatment process; And it provides a method for producing a tricot filtration water used in the reverse osmosis membrane filter is a step of heating to 150 ~ 200 ℃.

Hereinafter, the present invention will be described in more detail.

The present invention relates to a tricot filtrate (tricoat filtrate, permeate channel) made of a thermoplastic core sheath composite fiber using a high melting point resin as a core component and a low melting point resin as a primary component.

The thermoplastic heart sheath composite fiber used in the present invention is divided into a core component and a super component as shown in FIG. 2, and a high melting point resin is used for the core component, and a low melting point resin is used for the initial component.

The high melting point resin constituting the core component may be any thermoplastic resin that can be melt spun, but is preferably crystalline of polypropylene, polyethylene, poly-4-methylpentene, propylene, and αolefin. Any one or more resins selected from the group consisting of a copolymer, polyethylene terephthalate, polybutylene terephthalate, polyamide and polycarbonate may be sufficient, and more preferably polyethylene terephthalate is mainly used.

The low melting point resin constituting the sheath component of the present invention is sufficient if the melting point is lower than the high melting point resin, preferably modified by copolymerizing a low melting point components such as nylon and polypropylene to polyethylene terephthalate resin Low melting polyester (LMP: Low Melting Poly Ethylene Terephthalate) is used. More specifically, 20 to 50 parts by weight of the resin having a low melting point is copolymerized to 100 parts by weight of polyethylene terephthalate resin, and in general, the higher the copolymerization rate of the component having the lower melting point, the lower the melting point of the copolymerized polymer material, It can be thermally bonded at lower temperatures. However, when the content of the low melting point component exceeds 50 parts by weight, a large amount of stretched yarn is generated in the high-speed spinning process peculiar to long fibers, so that a uniform product cannot be obtained. When the content is less than 20 parts by weight, the melting point lowering effect due to the copolymerization effect is achieved. Since it appears below 8 degreeC, the low temperature heat bonding effect cannot fully be acquired.

On the other hand, it is preferable that the difference of melting | fusing point of the said high melting point resin and low melting point resin is 30-100 degreeC. Since the melting point of conventional polyester yarn is about 230 ~ 250 degrees, if the difference is less than 30 degrees, manufacturing is difficult due to equipment problems, and if the difference is more than 100 degrees

Deformation of low melting resin becomes easy to come.

The diameter ratio of the thermoplastic cardiac composite fiber and the core component of the present invention is preferably 1: 0.79 to 1: 0.87. This is because the ratio of high melting point resin to low melting point resin 7: 3 ~ 8: 2 is the most stable value for spinning.

The tricot filtration water to 150 ~ 200 ℃ the thermoplastic sheath type composite fiber

Prepare by heating. If it is heated below 150 ° C., the melting of the low melting point resin does not occur, and if it is heated above 200 ° C., it becomes too hard and also comes with equipment problems.

Preferably, the heating temperature is a temperature below the melting point of the high melting point resin while exceeding the melting point of the low melting point resin. In this case, only the low melting point resin melts and the high melting point resin maintains its shape and may have the effect of the present invention.

The low melting point resin is melted at the second part of the surface when heated at high temperature, the single filament of several strands are entangled with each other to have a sufficient hardness after cooling to produce a tricoat filtered water passage of the reverse osmosis filtering apparatus. Since the filtered water is dissolved in a high temperature heat of 150 ° C. or higher without a separate resin impregnation process as in the conventional manufacturing process and cooled, a required level of hardness is secured, and thus various human harmful components generated by epoxy resin treatment are caused. Not at all.

It is important to keep the core component and the sheath component of the thermoplastic cardiac composite fiber of the present invention at a constant ratio. That is, it is preferable to combine 25-43 weight part of said low melting resins with respect to 100 weight part of said high melting point resins. If the low-melting resin exceeds 43 parts by weight, the thermoplastic filament-type composite fiber does not exhibit adequate filament strength, so that the overall strength of the filtered water is lowered. If the low-melting resin is less than 25 parts by weight, the first component is uniform. There is a problem that the heat adhesion is not made sufficiently because it is not disposed around the core component. Therefore, it is important to maintain the proper content ratio of the core component and the supercomponent as well as to maintain uniform cross-sectional formation, as well as to maintain filament properties and overall nonwoven fabric properties.

The process for producing the thermoplastic heart sheath composite fiber of the present invention can be applied to any of the processes for producing a conventional heart sheath composite fiber, but preferably using a high melting point resin as a core component and a low melting point resin Producing a yarn by complex spinning in an echocardiography manner; Shaping the yarn in a warp tricot to produce a fabric; Removing impurities through the prepared fabric through a pretreatment process; And heating to 150 to 200 ° C. is effective to produce a filtered water reactor having appropriate hardness and physical properties while minimizing the content of impurities.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a cross-sectional view of the thermoplastic heart sheath composite fiber used in the tricot filtrate of the present invention, the heath side (2) is a low melting point (Tm) low melting point PET (Low-Melting Poly Ethylene Terephthalate) resin Core side (1) is made of a normal PET (Normal Poly Ethylene Terephthalate) resin. The core sheath-type composite fiber is solidified again when the superlayer portion is dissolved after cooling if heat is applied below the melting point of the high melting point material and above the melting point of the low melting point material.

3 is a cross-sectional view showing a state before and after heating of the thermoplastic heart sheath composite fiber. When the low melting point polyethylene terephthalate of 75d / 24f is used in the superlayer, all 24 filaments are separated because the outer layer is not melted before applying the heat of 180 ° C or higher, but after the heat is applied, the outside of each of the 24 filaments As the layers melt and solidify and stick together, they have the same properties as when they were single stranded. Therefore, when the 24 strands of the non-rigid fabric becomes 1 strand and has the desired hardness. The melting point of the melting of the outer layer is determined by the properties of the low melting point polyethylene terephthalate used in the outer layer, and the melting temperature can be changed to low or high by changing the raw material of the chip used for spinning the yarn. In general, the melting temperature may be varied from 150 ° C to 200 ° C on a dry heat basis according to the raw material, and it is necessary to determine the melting temperature according to the purpose of each product. The heating time varies depending on the melting temperature, but is preferably about 30 seconds to 3 minutes.

Hereinafter, the present invention will be described in detail by way of examples. The following examples are merely illustrative of the present invention, but the scope of the present invention is not limited to the following examples.

< Example  1>

70 parts by weight of polyethylene terephthalate (PET) and 30 parts by weight of polypropylene were added to a polymerization reactor, followed by polymerization and spinning. Using low-melting copolymer fibers prepared at 75 d / f as a supercomponent, 100 parts by weight of a conventional polyester (PET) fiber having an intrinsic viscosity of 0.655 was used as a core component to obtain a dough by a conventional method. The dough was pretreated at 100 ° C. for 30 minutes with a batch pretreatment to remove impurities, and then at 190 ° C. and 20 m / m at a heat tenter. Through a heat treatment, a tricoat filtered water passage of a reverse osmosis filtration apparatus was prepared.

< Comparative example  1>

When manufacturing low melting point copolymer, 100 parts by weight of polyethylene terephthalate is added without polypropylene, and 50d / 24f of copolymer fiber is used as a super ingredient. After pretreatment, the first heat treatment is a heat tenter. ) Proceed to 170 ℃, 40 m / m to dry the wet fabric, and the second heat treatment was carried out in the same manner as in Example 1 except that impregnated with epoxy resin while proceeding to 200 ℃, 20 m / m A tricot filtered water passage of a reverse osmosis filtration apparatus was prepared.

TOC (ppm) Example 1 6.5 Comparative Example 1 177

However, TOC is a measure of the amount of organic matter dissolved in 1Kg of solution through a TOC meter.

As confirmed in Table 1, it can be seen that the tricot filtrate made of the vinegar-type biconic-type composite fiber of the present invention contains only significantly less harmful substances than the conventional filtrate.

In the method of producing a tricot filtration channel by impregnating with the existing epoxy resin, human harmful organic substances including amine and bisphenol-A must be contained, but the composite spinning of the high melting point resin and the low melting point resin of the present invention in the form of a deep seaweed Fiber is a very useful invention in the chemical industry having the advantage of high filtration efficiency because it does not have the harmful components.

Although the present invention has been described in detail only with respect to the embodiments described, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical spirit of the present invention, and such modifications and variations belong to the appended claims. .

Claims (8)

delete delete delete delete delete delete delete Manufactured using high melting point resin as a core component and low melting point resin as a super ingredient, the difference between the melting point of the high melting point resin and the low melting point resin is a reverse osmosis membrane filter composed of a thermoplastic heart type composite fiber having a temperature of 30 to 100 ° C. In the method for producing tricoat filtrate to be used, At least one high melting point resin selected from the group consisting of polypropylene, polyethylene, poly-4-methylpentene, crystalline copolymers of propylene and αolefin, polyethylene terephthalate, polybutylene terephthalate, polyamide and polycarbonate Is used as a core component, copolymerized polyethylene terephthalate resin and nylon, polypropylene alone or a mixture of the low-melting resin modified by the super-component composite spinning in the vinegar type method, Diameter ratio is 1: 0.79 ~ 1: 0.87, the thermoplastic heart sheath composite fiber is a step of producing a yarn by combining 25 to 43 parts by weight of the low melting point resin with respect to 100 parts by weight of the high melting point resin; Shaping the yarn in a warp tricot to produce a fabric; Removing impurities through the prepared fabric through a pretreatment process; And Method for producing a tricoat filtrate to be used in the reverse osmosis membrane filter, characterized in that the step of heating to 150 ~ 200 ℃.

Images