KR101953334B1 - A method for fabricating a gasket pad for drum sealing and a gasket pad for drum sealing using the fabric - Google Patents

Abstract

The present invention relates to a method of manufacturing a fabric for a gasket pad for drum sealing, and a gasket pad for drum sealing using the fabric. The gasket pad for drum sealing using the fabric is installed at one end and the other end of the drum of a dryer for drying laundry to reduce the friction coefficient by rotation when the drum is rotated to dry the laundry, as well as to enhance durability, abrasion resistance, and heat resistance. The method of manufacturing a fabric of a gasket pad mounted around the one end and the other end of the drum (D) to prevent leakage of hot air in the dryer equipped with the drum (D) comprises: a step a) of forming a natural fiber fabric layer (12) after spraying and laminating natural fibers mixed with one, two or more of wool, cotton, and hemp in a cotton form by using a molding machine; a step b) of forming a reinforcing fiber fabric layer (16) after spraying and laminating reinforcing fibers mixed with silicone in the gel state and a lead core in a cotton form by using the molding machine; a step c) of overlapping the natural fiber fabric layer (12) in the step a) and the reinforcing fiber fabric layer (16) in the step b), needle-punching the same with a needle punching machine (20) to be evenly tangled and mixed, and manufacturing felt fiber fabric (10); and a step d) of passing the felt fiber fabric (10) in the step c) through a heat treatment device (30), in which a heating roll (32) heated at 150 to 300°C and a pressing roll (34) above the heating roll (32) are installed, and heat-treating and compressing one surface of the felt fiber fabric (10) by the heating roll (32).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for fabricating a drum-sealing gasket pad and a gasket pad for drum sealing using the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for manufacturing a fabric applied to a gasket pad for drum sealing and a gasket pad for drum sealing using the fabric. More particularly, To a method of manufacturing a raw material gasket pad for a drum sealing, in which a friction coefficient due to the rotation is reduced and durability, abrasion resistance and heat resistance are enhanced when the drum is rotated, and a gasket pad for drum sealing using the raw material .

Generally, a dryer for drying laundry is provided with a drum therein, and hot air for drying the laundry is supplied to the inside of the drum to dry the laundry. At this time, hot air supplied to the drum is discharged to the outside A gasket pad for sealing is provided at one end and the other end of the drum.

The apparatus includes a drum rotatable in a main body of a dryer, a driving device for rotating the drum, and a drying device for closing the front and back of the drum to dry A front supporter and a rear supporter which form a space and support a front end and a rear end of the drum, and a heater which generates a hot air which is hot and dry, to automatically dry the laundry.

Between the front supporter, the drum, the rear supporter and the drum of the laundry dryer having the above-described structure, a felt gasket pad for preventing leakage of hot air and enhancing durability is provided.

Generally, such a gasket pad is installed by being adhered with an adhesive while surrounding the outer periphery of the front end and the rear end of the drum. At this time, if the gasket pad is affected by hot air for a long time, separation from the drum or loss of elasticity may occur.

Accordingly, as a technique for solving such conventional problems, Korean Patent No. 10-1010001 discloses a thermoplastic elastomer and a gasket for a drum washing machine manufactured by the same.

The above techniques include a multifunctional acrylate-based monomer having a molecular weight of 150 - 2,000 g / mol; A propylene-ethylene random copolymer having a melt flow index of 5 to 50 g / 10 min and an ethylene content of 1 to 7%; And an oil-added ethylene-propylene-non-conjugated diene terpolymer having a Mooney viscosity of 40 to 60 ML (1 + 4) 125 ° C. and a thermoplastic elastomer prepared therefrom, - 60 < / RTI >

However, the above-described technique can maintain the hardness of the gasket pad to some extent. However, if the gasket pad is used for a long period of time, the gasket pad needs to be replaced at regular intervals due to thermal deformation or deterioration of the sealing force. There is a problem that the performance of the gasket pad is deteriorated as well as the power consumption is drastically increased.

Korean Registered Patent No. 10-1010001 (Registered on January 14, 2011) Korean Registered Patent No. 10-0373146 (registered on Feb. 10, 2003) Korean Registered Patent No. 10-1292092 (Registered on July 26, 2013)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a gasket pad sealing and sealing a line / rear end of a drum, A method for fabricating a gasket pad for sealing a drum, which can reduce the coefficient of friction, extend the service life of the gasket pad, and reduce the power consumption by improving the power saving performance, and And a gasket pad for drum sealing using this fabric.

In order to accomplish the above object, the present invention provides a method of manufacturing a raw material gasket pad for drum sealing and a gasket pad for sealing a drum using the raw material, wherein the drum (D) A) a step of spraying a natural fiber, which is a mixture of one or more of wool, cotton, and hemp, in a cotton form using a molding machine; Laminating to form a natural fiber monolayer (12); b) spraying and laminating the reinforcing fibers mixed with the silicone in the gel state and the ventilation core in the form of a cotton using a molding machine to form a reinforcing fiber raw layer 16; c) The natural fiber monolayer 12 of step a) and the reinforcing fiber monolayer 16 of step b) are overlapped and needle punched by a needle punching machine 20 so that they are evenly mixed. Fabricating the fabric (10); And d) a step of heating the felt fiber fabric 10 of step c) to a heating roll 32 heated to 150-300 ° C and a heating roll 32 provided with a pressing roll 34 on the heating roll 32 30), and heat-treating and compressing one surface of the felt fiber fabric (10) by the heating roll (32).

In addition, the reinforcing fibers mixed with the gel of the gel state in the step b) and the green fiber are sprayed and laminated in the form of a cotton using a molding machine, and then one side of the reinforcing fiber is coated with teflon, and the teflon is coated with tetrafluoroethylene tetra fluoroethylene and polytetrafluoroethylene obtained by addition polymerization, and the reinforcing fiber of step (b) is a natural fiber obtained by mixing any one or two or more of natural fibers, 60 wt% of silicon, 10 - 60 wt% of silicon, and 10 - 60 wt% of uncured silicon.

10 to 50 parts by weight of polyphenylene sulphide may be further added to 100 parts by weight of the reinforcing fiber in the step b), and the natural fibers of the natural fiber raw material layer 12 in the step c) The mixing ratio of the reinforcing fibers of the fibrous monolayer 16 is preferably 1: 0.1-0.6 (wt / wt).

Meanwhile, in order to develop hue on the reinforcing fiber of step (b), one or both fibers of black fiber or blue fiber may be mixed, and the fiber of step (b) An inner layer formed by mixing any one or both of a general resin, a hard resin and a soft resin, and a soft resin or a soft resin foam which is wound around the outer circumferential surface of the inner layer at a predetermined interval Wherein resin fibers in which any one or more of polyethylene, polyester and nylon are mixed after the step a) or after the step b) To form the resin fiber monolayer 14 and the natural fiber monolayer 12 of the step a) and the reinforcing fiber monolayer 16 of the step b) Overlapping And the needle punching is performed by the needle punching machine 20 so that the felt fiber cloth 10 is uniformly mixed.

A method for manufacturing a raw fabric of a gasket pad for sealing a drum according to the present invention and a gasket pad for drum sealing using the raw fabric,

First, by fabricating the fiber fabric of the gasket pad by mixing the natural fiber and the reinforcing fiber, the friction coefficient is lowered, the abrasion resistance and the heat resistance are imparted to prolong the service life of the gasket pad and the power consumption can be remarkably reduced,

Second, the natural fiber and the reinforcing fiber are overlapped, then needle punching and heat treatment are performed to uniformly mix the fibers, and the mixed natural fibers and the reinforcing fibers can be stably maintained and the occurrence of lint can be prevented,

Thirdly, the manufacturing process of the gasket pad is made efficient, thereby improving the productivity.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a manufacturing process diagram showing a fabricating method of a gasket pad for sealing a drum according to a preferred embodiment of the present invention; FIG.
FIG. 2 is a side view showing a needle punching state of the felt fiber fabric of FIG. 1 according to a preferred embodiment of the present invention; FIG.
Figure 3 is a side view of a needle punching a felt fabric in accordance with a further preferred embodiment of the present invention.
FIG. 4 is a side view showing a state where the felt fiber fabric of FIG. 1 is heat-treated according to a preferred embodiment of the present invention; FIG.
5 is a perspective view illustrating a state in which a felt fiber fabric fabricated according to a preferred embodiment of the present invention is applied to a drum of a gasket pad.

A method for fabricating a drum-sealing gasket pad according to the present invention comprises the steps of:

A method of manufacturing a fabric for a gasket pad, which is mounted around the one end and the other end edge of the drum (D) to prevent leakage of hot air in a dryer equipped with the drum (D)

a) forming a natural fiber monolayer 12 by spraying and laminating natural fibers mixed with one or more of hairs, cotton, and hemp in a cotton form using a molding machine;

b) spraying and laminating the reinforcing fibers mixed with the silicone in the gel state and the ventilation core in the form of a cotton using a molding machine to form a reinforcing fiber raw layer 16;

c) The natural fiber monolayer 12 of step a) and the reinforcing fiber monolayer 16 of step b) are overlapped and needle punched by a needle punching machine 20 so that they are evenly mixed. Fabricating the fabric (10); And

d) a step of heating the felt fiber fabric 10 in step c) to a heating roll 32 heated to 150-300 ° C and a heat treatment apparatus 30 provided with a pressing roll 34 on the heating roll 32 ), And heat-treating and compressing one surface of the felt fiber fabric (10) by the heating roll (32), wherein the fabric of the gasket pad is produced by mixing natural fiber and reinforcing fiber The friction coefficient is lowered and wear resistance and heat resistance are imparted to prolong the service life of the gasket pad and at the same time reduce the power consumption significantly. The natural fiber and the reinforcing fiber are superimposed on each other, and then needle punching and heat treatment are performed. And the mixed natural fiber and the reinforcing fiber can be stably maintained.

Hereinafter, the method for fabricating the drum-sealing gasket pad according to the present invention will be described in detail.

a) Step

Natural fibers having one, two or more of natural fibers, cotton fibers, and hemp fibers are mixed and sprayed in a cotton form using a molding machine or the like to form a natural fiber monolayer 12.

The natural fibers are already in a fibrous state in an intact state and can be used as fibers by a relatively simple physical manipulation. On the other hand, the above-mentioned natural fibers exhibit functions such as suppressing generation of static electricity as well as improvement in heat resistance.

b) Step

The reinforcing fiber mixed with the gel state silicon and the ventilating fiber is sprayed and laminated using a molding machine or the like to form a reinforcing fiber raw layer 16.

The silicone is a material that is easily heat-resistant, flame-retardant, and processable. Silicone-like silicone is widely used in general textile products. Its properties include heat resistance with little change with temperature, oxidation resistance without being oxidized, Resistance to water, water repellency and water resistance, and is applied to the processing of textile products.

Meanwhile, in the present invention, in order to reduce the coefficient of friction and to reduce the power consumption of the dryer in accordance therewith, silicon in gel state is contained. The silicone can be used in both one-component type and two-component type, It is preferable to use one-component silicon because the porosity becomes large, which may result in problems on the product.

The soft core may include one or more inner layers formed in a cylindrical shape by a general resin, a hard resin or a thin flexible resin film, and a soft resin or soft resin foam which is wound around the outer circumferential surface of the inner layer It is an integrated type of mind. In addition, the above-mentioned mandrel can be made of an empty core in the form of an empty core, and has a characteristic of strengthening durability and abrasion resistance and strengthening the binding force with the mixed fabric.

In this case, in the present invention, the mandrel is composed of an inner layer formed by mixing any one of a general resin, a hard resin and a soft resin or a mixture of two or more of them, and a soft resin or soft resin Or a mixture of any two or all of the foams may be used.

A preferable mixing ratio of the materials constituting the reinforcing fiber may be 40 wt% to 60 wt% of gel state silicon, and 40 wt% to 60 wt% of the raw fiber.

At this time, when the silicon is mixed in more than 60 wt% with respect to the total wt%, the function of lowering the coefficient of friction and the property of increasing heat resistance and flame retardancy are excellent, but it is not economical because it is added more than necessary, When mixed at less than 40 wt.% based on wt. That is, the heat resistance and the flame retardancy and the function of lowering the friction coefficient may be remarkably deteriorated.

In addition, when the above-mentioned ingot is mixed with more than 60 wt% with respect to the total wt%, the binding force with other fabric becomes very strong, which causes inconveniences in a subsequent process such as needle punching, %, The durability and abrasion resistance of the fiber as well as the lowering of the binding force with other fabrics may be significantly lowered.

As a further example, the reinforcing fibers may comprise 10wt% to 60wt% of natural fibers mixed with one or more of wool, cotton and hemp, 10wt% to 60wt% silicon in gel state, 10wt% to 60wt% Or may be mixed.

The reinforcing fibers formed by mixing the silicon and the drawn core are sprayed and laminated in the form of a cotton using a molding machine or the like, and then the frictional coefficient is improved and the heat resistance is enhanced. When the drum is applied to the drum, Teflon may be coated on one surface of the reinforcing fiber sprayed in a cotton-like manner through a molding machine to prevent discoloration of the reinforcing fiber.

Here, the Teflon corresponds to a trade name and is a generic name of synthetic polymers containing fluorine atoms in the molecule. Polytetrafluoroethylene (PTFT), perflouakoxy plastic (PEA), polyethylene tetrafluoroethylene (ETFE), polyvinylidene fluoride (PVDF), poly And polychlorotrifluoro ethylene (PCTFE) copolymers. These various resins are widely used in various fields.

Meanwhile, the Teflon in the present invention is preferably polytetrafluoroethylene obtained by addition polymerization of tetrafluoroethylene. It is preferable to coat Teflon with the reinforcing fiber monolayer 16 There is an advantage that the properties such as improvement in the number of friction, heat resistance and chemical resistance can be improved.

As a further example, 10 to 50 parts by weight of polyphenylene sulfide (PPS) may be further added to 100 parts by weight of the reinforcing fiber.

The polyphenylene sulfide is one of thermoplastic resins which is excellent in strength, heat resistance, flame retardancy and processability and can be produced by polyphenylene sulfide resin having various flow properties through controlling the molecular weight and molecular weight distribution in the polymerization process .

In the present invention, by further including the polyphenylene sulfide, in manufacturing the gasket pad using the final fabric, there is an advantage that the friction coefficient can be reduced and the power consumption of the dryer can be reduced accordingly.

On the other hand, when the amount of the polyphenylene sulfide is more than 50 parts by weight, strength, heat resistance, flame retardancy and the like may be improved. However, the polyphenylene sulfide is not economical because it is added more than necessary. When the polyphenylene sulfide is less than 10 parts by weight, , The function of lowering the friction coefficient as well as the lowering of the function such as flame retardancy becomes small.

As another further embodiment, one or both fibers of black fiber or blue fiber may be mixed and added to develop color in the reinforcing fibers.

As another further embodiment, resin fibers in which any one or two or more of polyethylene, polyester, and nylon are mixed may be sprayed and laminated in a cotton form using a molding machine or the like, The single layer 14 can be formed.

The resin fibers are made of fibers by preparing organic synthetic materials that are not natural in nature by using small molecules such as petroleum, coal, limestone, and chlorine in a net chemical fashion, and then making them into elongated polymeric compounds in the form of fibers. It is also called "synthetic fiber" because it is made by chemically synthesizing molecules, and the above-mentioned resin fibers have excellent properties of elasticity and abrasion resistance.

The resin fiber monolayer 14 can be formed regardless of the order of forming each fiber layer in the fabric manufacturing method according to the present invention. The resin fiber monolayer 14 and the natural fiber monolayer 12 Or mixing the resin fiber monolayer 14 and the reinforcing fiber monolayer 16 or mixing both the resin fiber monolayer 14 and the natural fiber monolayer 12 and the reinforcing fiber monolayer 16 can do.

c) Step

A felt fiber fabric 10 is formed by needle punching a needle puncher 20 to be mixed with a natural fiber monolayer 12 and a reinforcing fiber monolayer 16 of step b) .

The preferred mixing ratio of the natural fiber monolayer 12 and the reinforcing fiber monolayer 16 is 0.1 to 0.6 wt% of the reinforcing fiber monolayer based on 1 wt of the natural fiber monolayer. If the reinforcing fiber monolayer is added in an amount exceeding 0.6 wt%, it is uneconomical because it is added more than necessary, and when the reinforcing fiber monolayer is added in an amount less than 0.1 wt%, the friction coefficient decrease, wear resistance and heat resistance do not meet the expected values .

As a preferred embodiment of producing the felt fibers by mixing the above-mentioned fibers, the natural fibers and the reinforcing fibers are pulverized in the form of a cotton using a fiber fabricating machine such as a sowing machine, A natural fiber monolayer and a reinforcing fiber monolayer are provided, and then these are superimposed on each other, and needle punching is performed by a needle punching machine 20 so that each of the overlapped fabrics is tangled together to integrate them.

As a further example, resin fibers in which one or more of polyethylene, polyester, and nylon are blended are sprayed and laminated using a molding machine to form a resin fiber monolayer Then, the above-mentioned resin fiber monolayer, the natural fiber monolayer of the step a) and the reinforcing fiber monolayer of the step b) are overlapped and needle-punched by the needle punching machine 20 so as to be evenly mixed to produce a felt fiber cloth It is possible.

d) Step

As shown in FIG. 4, the felt fabric 10 is heated by a heating roll 32 heated to 150 to 300 ° C and a heating roll 32 provided with a pressing roll 34 on the heating roll 32 (30), and heat-treating and compressing one surface of the felt fiber fabric (10) by the heating roll (32).

One end of the felt fabric 10 fabricated through the above steps can be cut along the length direction so as to have a width for manufacturing a gasket pad after thermally processing and compressing one surface of the felt. A heating roll 32 heated to 150 to 300 캜 and a heat treatment apparatus 30 provided with a pressing roll 34 at the upper portion of the heating roll 32 are used to heat the felt fabric 10 It is possible to pass between the heating roll 32 and the pressing roll 34.

The surface of one side of the felt fiber cloth 10 is heat treated by using the heating roll 32 so that no lint is generated on one side surface of the felt fiber cloth 10, The surface of one side of the felt fiber fabric 10 is directly heated to heat-shrink the reinforcing fiber and secure the safety of the felt fiber fabric 10 due to the generation of a strong entanglement force between the natural fiber and the reinforcing fiber, There is an advantage to be able to.

At this time, the pressing roll 34 presses the felt fiber fabric 10 toward the heating roll 32 to increase the heat transfer efficiency of the heating roll 32 to the felt fiber fabric 10, As well as compressing the felt fabric 10.

In other words, when one surface of the felt fabric 10 advances in surface contact with the heating roll 32, one surface of the surface-contacted felt fabric 10 is thermally shrunk by the heating roll 32 The surface becomes beautiful.

Hereinafter, a preferred embodiment of producing a gasket pad for sealing a drum using the felt fabric fabric manufactured through the above steps will be described.

After the one surface of the felt fiber fabric is heat treated and compressed, it may further be cut along the length to have a width for application to the drum of the gasket pad.

Preferably, the cut felt fabric is used to sew a stretch band along the lengthwise direction of one side of the heat treated surface, and a stretch band protective member adhered to the back surface of the stretch band. This is because the material of the stretching band is elastic. That is, it may be made of any one of rubber, synthetic resin, and silicone having elasticity. Such materials having elasticity are mostly weak in durability, so that the elasticity of the elastic band is added.

In addition, when the elastic band protection member is not attached to the back surface of the stretch band, the stretch band is heated and cooled, and the stretchability of the band is lowered, and cracks are generated or cut Therefore, in order to prevent this, it is preferable to use a member having a stretch band protecting member adhered to the back surface of the stretch band. Preferably, the stretchable band protecting member is formed of mesh-like fibers having high durability due to the nature of the structure.

At this time, the reason why the stretching band is used is the sealing part of the drum. That is, when the drum is sealed by wrapping around the outer periphery of the drum, the felt fiber fabric is provided with firmness, and the outer peripheral sealing performance of the drum is improved due to the elasticity of the stretching band. On the other hand, when sewing the stretchable band, it is preferable to sew both side edges of the stretchable band.

When a stretch band is sewn along one side surface edge of the felt fiber fabric along the longitudinal direction of the felt fiber fabric as described above, a portion of the other side edge of the felt fabric not yet sewn by the stretch band is not heat- Folded along the longitudinal direction of the back side of the drum, and the reason for this is that the felt fiber fabric is overlapped and sewed to increase the firmness of the felt fiber fabric, and the periphery of the dryer, which is in surface contact with the line / Device. That is, the surface contact force between the front supporter and the rear supporter is improved.

When the other side edge is folded and sewn as described above, the sewed felt fiber cloth is cut so as to have a length comparable to the outer diameter of the drum, both ends of the both ends of the cut felt fiber are brought into mutual butt contact, Tie them together and integrate them.

In one end sewing method of the mutually butt-contacted felt fabric, in one embodiment, the edge is sewed by repeatedly sewing a certain number of times in the direction of the succession of sewing seams folded and sewed, and thereafter sewing along the butt- The reason for repeating the sewing by repeating the sewing line several times in the direction of the sewing line several times is to prevent the sewing line from being loosened because the sewing lines at the both ends cut off can be loosened.

The reason why the cut ends are brought into butt contact and which is sewn in the zigzag direction along the butt contact line is to make the both ends sewn flat without a step. For example, if a step is formed at both ends, the sealing force due to the step may be lowered.

After the sewing is completed in the zigzag direction along the butt contact line, the stretch band is then folded along the longitudinal direction in the direction of the back which is not heat treated, and from the seam to the edge of the edge folded, And is formed as an extension part surrounding the outer diameter.

The reason for forming the extended portion is to firmly surround the outer diameter of the drum to maintain airtightness. However, it is preferable that the inner surface of the extended portion and the outer diameter of the drum are adhesively fixed using an adhesive.

Hereinafter, the present invention will be described in more detail with reference to examples and test examples.

[Example 1]

The same amount of mixed fibers, yarns and yarns were sprayed and laminated in a cotton form to form a natural fiber monolayer. The reinforcing fibers, which were obtained by mixing the gel-state silicon and the green fiber, were spray- To form a reinforcing fiber monolayer.

70wt% of the natural fiber monolayer and 30wt% of the reinforcing fiber monolayer were mixed and overlapped and needle punched with a needle punching machine so as to be evenly mixed to produce a felt fiber cloth.

The felt fiber fabric thus prepared was subjected to a heat treatment and a compression process, and was cut into a size of about 10 cm in width and about 10 cm in length.

[Example 2]

And the mixture was sprayed and laminated in a cotton-like form using a mortar molding machine to form a natural fiber monolayer, and polyethylene, polyester, and nylon were mixed and sprayed in a cotton form using a molding machine, Thereby forming a monolayer.

Next, reinforcing fibers prepared by mixing polyphenylene sulfide (polyphenylene sulphide), silicone in a gel state and a green fiber are laminated in a cotton form using a molding machine, and then teflon is coated on one surface thereof, .

30wt% of the natural fiber monolayer, 30wt% of the resin fiber monolayer, and 40wt% of the reinforcing fiber monolayer were mixed and overlapped and then kneaded by a needle punching machine so as to be evenly mixed.

The felt fiber fabric thus prepared was subjected to a heat treatment and a compression process, and was cut into a size of about 10 cm in width and about 10 cm in length.

[Example 3]

A natural fiber monolayer was formed by spraying in a cotton form using a mortar molding machine, and a resin fiber monolayer was formed by spraying and laminating a polyester using a molding machine.

The natural fiber monolayer and the resin fiber monolayer were mixed at the same ratio, and then the mixture was kneaded and kneaded by a needle punching machine to prepare a felt fiber cloth.

The felt fabric prepared as described above was subjected to a heat treatment and a compression process and cut to a size of about 10 cm in width and about 10 cm in length.

[Comparative Example]

As a control group for comparison with the experimental group prepared in the examples, the fabric (containing 100% of the resin fiber) of the gasket pad for sealing the drum, which is sold in the market, was obtained and cut to a size of about 10 cm in width and about 10 cm in length.

[Test Example]

Table 1 below shows the test result values obtained from the tests through Examples and Comparative Examples. On the other hand, the test conditions and the test method were carried out in accordance with the following conditions.

1) Tensile strength test: JIS-K-6301

2) Coefficient of friction: KS R4024

division Composition ratio (wt%) Example 1 Example 2 Example 3 Comparative Example Natural fiber mother 25 30 50 - if 25 - - - hemp 25 - - - Resin fiber Polyethylene - 10 - - Polyester - 10 50 100 nylon - 10 - - Reinforcing fiber PPS 6.25 10 - - silicon 6.25 10 - - Ambition 6.25 10 - - Teflon 6.25 10 - - Tensile Strength (MPa) 15.24 14.23 12.57 9.12 Coefficient of friction 0.42 0.50 0.48 0.55

Example 1 will now be described with reference to Table 1. In the present invention, it is assumed that natural fibers such as hops, cotton, hemp, polyphenylene sulfide (PPS) constituting reinforcing fibers, silicone, It is confirmed that the tensile strength and the coefficient of friction are superior to those of the other Examples and Comparative Examples.

Example 2 is a test result of containing natural fiber wool, polyethylene resin, polyester, nylon, and polyphenylene sulfide, silicone, green fiber and Teflon constituting reinforcing fiber, But it is confirmed that the tensile strength and the coefficient of friction are somewhat inferior to those of Example 1 made of natural fibers and reinforcing fibers.

Example 3 is a test result in which the natural fiber, mohair, is contained only as a polyester resin, and is superior in the tensile strength and the friction coefficient in comparison with the comparative example. However, the tensile strength and the frictional coefficient are higher than those in Examples 1 and 2 It can be confirmed that the coefficient is inferior.

As a result of the test, it can be concluded that when composed of natural fibers and reinforcing fibers, the coefficient of friction is lowered and the tensile strength is higher.

D: Drum 20: Needle punching machine
10: felt fabric 30: heat treatment apparatus
12: natural fiber monolayer 32: heating roll
14: resin fiber monolayer 34: pressure roll
16: reinforced fiber origin layer

Claims (9)

A method of manufacturing a fabric for a gasket pad, which is mounted around the one end and the other end edge of the drum (D) to prevent leakage of hot air in a dryer equipped with the drum (D)
a) forming a natural fiber monolayer 12 by spraying and laminating natural fibers mixed with one or more of hairs, cotton, and hemp in a cotton form using a molding machine;
b) a reinforcing fiber mixed with natural fiber, silicon in a gel state and a green fiber is laminated in a cotton form using a molding machine, and then teflon is coated on one surface thereof to form a reinforcing fiber raw layer (16) step;
c) The natural fiber monolayer 12 of step a) and the reinforcing fiber monolayer 16 of step b) are overlapped and needle punched by a needle punching machine 20 so that they are evenly mixed. Fabricating the fabric (10); And
d) a step of heating the felt fiber fabric 10 in step c) to a heating roll 32 heated to 150-300 ° C and a heat treatment apparatus 30 provided with a pressing roll 34 on the heating roll 32 ), And heat-treating and compressing one surface of the felt fiber fabric (10) by the heating roll (32)
The Teflon is polytetrafluoroethylene obtained by the addition polymerization of tetrafluoroethylene,
Wherein the reinforcing fiber is a mixture of 10-60wt% of natural fibers, 10-60wt% of gel state silicon and 10-60wt% of raw fibers mixed with any one or more of wool, cotton, and hemp A method of fabricating a gasket pad. delete delete The method according to claim 1,
Further comprising 10 to 50 parts by weight of polyphenylene sulphide based on 100 parts by weight of the reinforcing fiber of step b). The method according to claim 1,
Wherein the mixing ratio of the natural fibers of the natural fiber clay layer 12 and the reinforcing fiber of the reinforcing fiber clay layer 16 in the step c) is 1: 0.1-0.6 (wt / wt) A method for fabricating a pad.
The method according to claim 1,
A method of manufacturing a gasket pad for drum sealing according to any one of the preceding claims, wherein either one or both of black fiber or blue fiber is mixed with the reinforcing fiber of step b) Way. The method according to claim 1,
In the step b), an inner layer formed by mixing one or more of a general resin, a hard resin and a soft resin, and a soft resin or soft resin foam which is wound around the outer circumferential surface of the inner layer at a predetermined interval Wherein the gasket pad is formed by mixing one or both of the two or more materials. delete A gasket pad for sealing a drum, produced using a felt fabric (10) made by the method of any one of claims 1 to 7.

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