KR101892185B1 - Manufacturing Equipment For Aramid Structure And Aramid Composite Manufactured By The Same - Google Patents

Abstract

The present invention relates to an apparatus for manufacturing an aramid structure, comprising: 1) a pair of upper and lower supply rollers provided opposite to each other at a constant distance to supply upper and lower portions of an aramid structure; 2) A pair of core feed rollers for feeding the material of the core portion, 3) a pair of heating and pressing plates for heating and pressing to easily deform the core portion supplied from the core portion feed rollers, 4) A pair of compression rollers vertically pressing the upper and lower portions of the received aramid structure and the corrugated core portion deformed by the heating and pressing plate to bind to the upper and lower inner surfaces; And 5) a pair of heat treatment plates for fixing the aramid structure which is firmly bonded to the compression roller.

Description

Technical Field [0001] The present invention relates to an apparatus for manufacturing an aramid structure and an aramid structure produced thereby.

The present invention relates to an apparatus for manufacturing an aramid structure and an aramid structure produced thereby. More particularly, the present invention relates to a manufacturing apparatus for producing a corrugated corrugated structure of a para-aramid-based high-strength fiber fabric and an aramid structure produced thereby.

Generally, polyamide-based synthetic resins are classified into aliphatic polyamides and aromatic polyamides. Aliphatic polyamides are commonly known under the trade name Nylon and aromatic polyamides are known under the trade name Aramid.

Aromatic polyamides, developed in the 1960s, have been developed to improve the heat resistance of nylon, an aliphatic polyamide, and are well known for their trade names such as Nomex, Kevlar, and these aromatic polyamides are known as flame- , Tire cord and the like, and has high heat resistance and high tensile strength.

A typical aliphatic polyamide is a synthetic resin having an aliphatic hydrocarbon bonded between amide groups, and an aramid is a synthetic resin having an amide bond having 85% of benzene groups bonded to two aromatic rings between amide groups.

The aliphatic hydrocarbon of the aliphatic polyamide easily undergoes molecular motion when heat is applied, whereas the benzene ring of the aromatic polyamide is stable to heat and has a high elastic modulus because the molecular chain is rigid and molecules do not easily move even when heat is applied. And there are many differences in characteristics.

The aromatic polyamide is classified into a para-aramid and a meta-aramid. The para-aramid is represented by Kevlar developed by DuPont. The para-aramid is the benzene ring bound to the amide group at the para position.

 Aramid fibers may be used alone in the form of yarns, staples, pulp, cords, fabrics, etc., or may be used as reinforcements in other polymeric or cement composite materials. As a substitute for asbestos, which is regulated for use in various automobiles and industrial belts, carcinogenic problems, as well as body armor and bulletproof helmets protecting the lives of police officers and soldiers, large automobiles and aircraft brakes, tires for special tractors and racing cars, aircraft tires, And ship ropes, gloves and clothing to protect the body from sharp objects. Composite materials using aramid fiber are used in the production of airplane structures, marine boats, tennis racquets, fishing rods, and sporting goods such as skis.

If a stronger structure is required depending on the use purpose, the corrugated structure may be used as a core which is an intermediate material. The corrugated wrinkle structure of the core, which is an intermediate material, has a strength higher than its weight and has an advantage of low cost.

Generally, a method of generating a wrinkle structure is a method in which a fabric is directly passed between gears and vertically upward and downward pressure is applied to the fabric by gears to generate a wrinkle structure. In this case, material damage or difficulty in preserving the form is difficult.

Korean Patent No. 1424102 relates to a method for manufacturing a shatterproof material for a vehicle using a concave-convex roller, and is a method of applying a direct vertical pressure of a concave-convex roller to a fabric,

Korean Patent Registration No. 0957131 also uses the vertical pressure of the rollers as a device for producing a laminated sheet in which a corrugated loop is formed.

Korean Patent Laid-Open Publication No. 2013-0141435 discloses an apparatus and a method for manufacturing a corrugated product, which discloses a method of forming a corrugation due to a difference in the moving speed of an intermediate member due to a difference in rotation ratio between a supply roller and a discharge roller, There is a difference in that the vertical pressure by the direct roller of the intermediate member is not used.

The present invention is an apparatus for manufacturing a structure including a corrugated intermediate member without damaging easily and easily.

It is an object of the present invention to provide a manufacturing apparatus for forming a structure with only heat and pressure in a supply apparatus for manufacturing a para-aramid fabric structure.

It is also an object of the present invention to provide a structure in which a wrinkled shape in which pressure is applied to a para-aramid fabric is fixed by heat.

It is another object of the present invention to control the bending rate of a desired core by using the speed and pressure of the para aramid fabric supplied through the upper and lower rollers.

In addition, the present invention aims at providing the temperature of the core portion pressure plate to give flexibility to the raw material to be fed, and to control the shape thereof.

Another object of the present invention is to adjust the size of the core portion by adjusting the interval of the core portion pressure plate.

In order to solve the above problems, the present invention provides an apparatus for manufacturing an aramid structure, comprising: 1) a pair of upper and lower supply rollers provided opposite to each other at a constant distance to supply upper and lower portions of the aramid structure; 2) 3) a pair of heating and pressing plates for heating and pressing so as to facilitate the deformation of corrugation shape supplied from the core part feeding roller 4; A pair of compression rollers vertically pressing the upper and lower portions of the aramid structure provided from the pair of upper and lower feed rollers and the corrugated core portion deformed by the heating and pressing plate to bind to the upper and lower inner surfaces; And 5) a pair of heat treatment plates for fixing the aramid structure that is firmly bonded to the compression roller.

Further, the present invention provides an apparatus for manufacturing an aramid structure, characterized in that the upper and lower portions can be additionally formed with adhesive portions on facing surfaces in order to adhere to the core portion.

Further, the present invention provides an apparatus for producing an aramid structure which is characterized in that the applied pressure is 5.5 to 7.5 (kg / cm ² ) to the heating and pressing plate of the core portion by the rotation speed (rpm) of the core portion feed roller at 20 to 30 minutes do.

Further, the present invention is characterized in that the length (d) of the heating and pressing plate is 30 to 50 cm, the inlet port width (a) is 10 to 25 cm, the inlet port to outlet port width ratio is 0.4 to 0.8 and the temperature is 120 to 170 ° C An apparatus for manufacturing an aramid structure is provided.

Further, the present invention provides an apparatus for manufacturing an aramid structure, characterized in that the heat treatment plate is heated at 60 to 90 캜.

The present invention also provides an aramid structure produced by any one of the apparatuses for producing an aramid structure.

Also, the present invention provides an aramid structure characterized in that the core portion bending ratio of the aramid structure is 0.3 to 0.6.

The present invention is characterized in that a pleated structure is simply formed by applying heat and pressure to a parametric fabric supplying device.

Further, the present invention is characterized in that a desired core bending rate can be controlled by using the speed and pressure of the para aramid fabric supplied through the upper and lower rollers.

Further, the present invention is characterized in that the core portion pressure plate is heated to provide a temperature, thereby imparting flexibility to the raw material to be supplied and controlling the shape of the wrinkle structure.

Further, the present invention is characterized in that the size of the core portion can be adjusted by adjusting the interval ratio of the core-portion heat-pressing plate.

1 is a conceptual diagram of an apparatus for manufacturing an aramid structure according to the present invention.
2 is a detailed view of a heating and pressing plate of an apparatus for manufacturing an aramid structure according to the present invention.
3 is a sectional view of an aramid structure manufactured by the apparatus for manufacturing an aramid structure according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

As used herein, the terms " about, " " substantially, " " etc. ", when used to refer to a manufacturing or material tolerance inherent in the stated sense, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.

 1 is a conceptual diagram of an apparatus 1 for manufacturing an aramid structure according to the present invention. The present invention relates to an apparatus for manufacturing an aramid structure, comprising: 1) a pair of upper and lower supply rollers (30) provided opposite to each other at a predetermined distance to supply upper and lower portions of an aramid structure; 2) a pair of core part feed rollers 10 positioned between the pair of upper and lower feed rollers 30 and supplying the material of the core part 80 between the upper and lower parts of the aramid structure 100; 3) a pair of heating and pressing plates 20 to be heated and pressed so as to facilitate the deformation of the corrugated shape of the core portion supplied from the core portion feed roller 10; 4) Upper and lower portions of the aramid structure provided from the pair of upper and lower supply rollers 30 and a pair of corrugated core portions 80 deformed by the heating and pressing plate 20 are vertically pressed to be adhered to the upper and lower inner surfaces A compression roller 40; And 5) a pair of heat treatment plates 50 for fixing the aramid structure 100 that is firmly bonded to the compression roller 40.

The upper and lower supply rollers 30 supply the aramid fabric to the compression roller 40 at a constant speed. An adhesive portion composed of an adhesive may be additionally applied to the facing surface in order to bond the core portion 80 to the inside of the aramid fabric supplied by the upper and lower supply rollers 30. [

The adhesive is preferably in the form of a commonly used hot melt film, and uses ethylene vinyl acetate (EVA), polyamide, polyester, acrylic, etc. as the main raw material.

The core part feed roller 10 maintains the feed pressure to 5.5 to 7.5 (kg / cm ² ) to the heating and pressing plate 20 of the core part by the revolution per minute (rpm) at 20 to 30 minutes. The core feed roller 10 can adjust the distance by the thickness of the aramid fabric of the core portion and is fed into the heating and pressing plate 20 by the rotation of the feed roller of the core portion.

At this time, under the condition of the input pressure of 5.5 to 7.5 (kg / cm ² ), the width of the discharge to the outside of the heating and pressing plate is smaller than the width of the inlet port, and the aramid fabric of the core portion is deformed into a corrugated shape due to pressure from the inlet port to the outlet port. If the inlet pressure is higher than 7.5 kg / cm ² , the fabric may be bent and the waveform may become irregular due to a large pressure. Conversely 5.55.kg/cm ² The pressure may not be so high as to cause the fabric to have a waveform.

2 is a detailed view of a heating and pressing plate of an apparatus for manufacturing an aramid structure according to the present invention. More specifically, it is preferable that the inlet width (a) is 10 to 25 cm and the interval ratio of the inlet to outlet width ratio is 0.4 to 0.8 under the above-mentioned inlet pressure based on the aramid fabric. If the pressure input port width (a) is less than 10 cm, there is a problem that the width of the inlet port and the outlet port is small and sufficient waveform can not be generated when the interval ratio of the inlet port to the outlet port width is taken as a reference.

On the other hand, if the width of the inlet port (a) is 25 cm or more, a pressure may not be generated on the fabric so as to cause wrinkles on the fabric of the paramater because the interval between the inlet and outlet of the heat-

The temperature of the heating and pressing plate 20 is preferably 120 to 170 ° C. In order to facilitate the deformation from the equilibrium to the corrugated shape in terms of the characteristics of the para-aramid fabric used in the present invention, thermal energy is supplied to the fabric so as to improve the degree of freedom of the para-aramid, When the temperature exceeds 170 ° C, the molecular structure of the para-aramid may be deformed.

Further, the heating and pressing plate 20 can supply sufficient heat energy considering the moving speed of the parametric fabric from the inlet to the outlet at a length (d) of 30 to 50 cm.

The pressing roller 40 presses the upper and lower portions supplied from the upper and lower feed rollers 30 in the vertical direction in the coupled state for bonding the corrugated corrugated core portion passing through the core portion feed roller and the heat pressing plate. At this time, an adhesive may be additionally provided on the facing surface in order to facilitate the adhesion, and it is proper to heat the adhesive up to the melting temperature of the adhesive for adhesion in the molten state.

In addition, the compression roller 40 is 0.5 ~ ² kg / cm 2 . And the pressure for adhesion in the range where the molten adhesive is not deformed in the corrugated shape of the core portion.

The heat treatment plate 50 may be maintained at 60 to 90 ° C in order to prevent deformation due to abrupt cooling in the state where the upper and lower portions and the core portion are adhered, followed by cooling at room temperature.

The cooled aramid structure is discharged at a speed of 5 to 10 m / min. At a speed of 10 m / min or more, the movement is not performed before the waveform is formed, so that a desired curvature is difficult to be generated. This is because the discharge can not be discharged and the outlet can be clogged.

As shown in FIG. 3, the aramid structure manufactured by the apparatus for producing an aramid has corrugated corrugated portions formed by the core portion 80. At this time, the bending rate of the core portion 80 corresponds to 0.3 to 0.6. The oyster lock ratio corresponds to the reciprocal of the radius of the circle based on the circular shape formed at the curve of the corrugation. Therefore, if the radius is small, the bending rate is large. When the bending rate is more than 0.6, the number of corrugated waves per unit length is high. This means that there is no space between the corrugations and the weight of the aramid structure is increased. Conversely, if the bending rate is less than 0.3, the number of corrugated wave forms per unit length is small, which may be structurally vulnerable to vertical pressure.

Hereinafter, the present invention will be described in more detail with reference to examples. It is to be understood, however, that these examples are provided so as to understand the scope of the present invention, and are not to be construed as limiting the scope of the present invention.

Example  One

A polyparaphenylene terephthalamide composition containing 20% by weight of a polyparaphenylene terephthalamide composition using sulfuric acid (SA) as a solvent Dope.

Polyparaphenylene terephthalamide aramid dope extracts dope sulfuric acid using dilute sulfuric acid to produce polyparaphenylene terephthalamide aramid yarn.

The woven fabric is converted into a woven form, and the woven fabric is put into the apparatus for manufacturing an aramid structure.

At this time, the heating press plate length is 30 cm, the heating press plate inlet width (a) (cm) is 10 cm, the interval ratio is 0.6, the core part feed pressure is 7.5 kg / cm ² , and the feed roller speed is 20 RPM .

2. Examples 2 to 3 and Comparative Examples 1 to 2

The conditions of the heating pressurizing plate length, the heating pressurizing plate inlet width (a), the interval ratio, the number of revolutions per minute of the feed roller and the core inlet pressure are as shown in Table 1 below.

division Heating pressure
Plate length (d) (cm) Heating pressure
plate
Width of inlet (a) (cm) Heating pressure plate interval ratio (b / a) Core portion
Input pressure
(kg / cm ² ) Core portion
Feed roller
Revolutions per minute
(RPM) Core portion
Flexion rate Example One 30 10 0.6 7.5 20 0.35 2 40 10 0.6 6 30 0.42 3 50 15 0.5 5.5 30 0.58
Comparative Example One 30 10 0.5 12 60 4.3 2 35 12 0.2 10.5 18 2.8 3 10 10 0.6 8.5 20 1.6 4 30 25 0.6 3.5 20 0.15 5 80 15 0.7 2.8 20 0.08

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be clear to those who have knowledge of.

1: aramid structure manufacturing apparatus 10: core part feeding roller 20: heating and pressing plate 30: upper and lower feed rollers 40: compression roller 50: heat treatment plate 60: upper part 70: lower part 80: core part 100: aramid structure
d: length of heating and pressing plate a: inlet port width
b: outlet width

Claims (7)

An apparatus for manufacturing an aramid structure,
1) a pair of upper and lower supply rollers provided opposite to each other at a constant distance to supply upper and lower portions of the aramid structure;
2) a pair of core part feed rollers located between the pair of upper and lower feed rollers and supplying the material of the core part between the upper and lower parts of the aramid structure;
3) a pair of heating and pressing plates which are heated and pressed so as to facilitate deformation of corrugation shape of the core portion supplied from the core portion feed roller;
4) a pair of compression rollers vertically pressing the upper and lower portions of the aramid structure provided from the pair of upper and lower feed rollers and the corrugated core portion deformed by the heating and pressing plate to bind to the upper and lower inner surfaces; And
5) a pair of heat treatment plates for fixing the aramid structure bonded by the compression roller,
Characterized in that the heating and pressing plate has a length (d) of 30 to 50 cm, a width of the inlet (a) of 10 to 25 cm, a spacing ratio of the inlet to outlet width ratio of 0.4 to 0.8 and a temperature of 120 to 170 ° C. .
The method according to claim 1,
Wherein the upper and lower portions are characterized in that an adhesive portion can be additionally formed on the facing surface in order to adhere to the core portion.
The method according to claim 1,
Wherein the pressure applied to the heating pressurizing plate of the core portion by the rotation speed (rpm) of the core portion feed roller at 20 to 30 minutes is 5.5 to 7.5 (kg / cm ² ).
delete The method according to claim 1,
Wherein the heat treatment plate is characterized by applying heat at 60 to 90 占 폚.
An aramid structure produced by an apparatus for producing an aramid structure according to any one of claims 1 to 3 or 5.
The method according to claim 6,
Wherein the core portion bending ratio of the aramid structure is 0.3 to 0.6.

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