KR101855874B1

KR101855874B1 - Pressure vessel

Info

Publication number: KR101855874B1
Application number: KR1020150056965A
Authority: KR
Inventors: 허석봉; 김도연
Original assignee: 일진복합소재 주식회사
Priority date: 2014-04-25
Filing date: 2015-04-23
Publication date: 2018-06-01
Also published as: KR20150123733A

Abstract

A pressure vessel according to a first embodiment of the present invention includes: a liner of a thermoplastic resin capable of filling and discharging a fluid and having a strain determined based on a first thermal expansion coefficient; A reinforcing layer formed on the outside of the liner by reinforcing fibers impregnated in the first synthetic resin; And an adhesive layer provided between the liner and the reinforcing layer by a second synthetic resin, wherein the adhesive layer is adhered to the liner and the reinforcing layer, and the actual strain of the liner at a temperature change due to filling and discharging of the fluid is And the reinforcing layer is made smaller than the strain of the liner based on the first thermal expansion coefficient.

Description

[0001]

The present invention relates to a pressure vessel, and more particularly to a pressure vessel for blocking inflow of fluid between layers during filling and discharging of the fluid.

BACKGROUND ART A pressure vessel is a vessel used for storing various fluids such as oxygen, natural gas, nitrogen, hydrogen, and the like. Conventionally, a nozzle boss and a liner are made of a metallic material, and carbon fiber, glass fiber Of reinforcing fibers.

However, the conventional pressure vessel made of a metallic liner has a problem that the weight of the pressure vessel is heavy due to the nature of the metal, is extremely weak in corrosion, and the manufacturing cost is high.

In order to solve this problem, plastic liner made of synthetic resin was manufactured. Due to the nature of plastic, it was possible to lighten weight and improve corrosion resistance compared with metal material.

However, even in the case of manufacturing a pressure vessel using a plastic liner, it is manufactured by winding or laminating reinforcing fibers such as carbon fiber or glass fiber on the outside of the plastic liner. In this case, the liner and the reinforcing fiber are not completely bonded A phenomenon occurs.

That is, the gap between the liner and the reinforcing fiber changes in size due to a temperature change generated during discharging and filling various fluids such as oxygen, natural gas, nitrogen, and hydrogen, and the gap is filled with the fluid And the inflow fluid is temporarily collected.

The fluid that has flowed into the gap and is trapped is temporarily discharged to the outside due to the contraction and expansion of the liner, thereby causing an unpleasant odor and possibly explosion.

Therefore, it is urgent to develop a pressure vessel in which the gap between the liner and the reinforcing fiber is blocked.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pressure vessel that prevents the trapping of fluid between the liner and the reinforcing fiber beforehand to prevent the occurrence of an unpleasant odor and to minimize the possibility of explosion.

The second thermal expansion coefficient of the reinforcing layer of the pressure vessel according to the first embodiment of the present invention is smaller than the first thermal expansion coefficient.

The third thermal expansion coefficient of the second synthetic resin of the pressure vessel according to the first embodiment of the present invention may be smaller than the first thermal expansion coefficient.

The first coefficient of thermal expansion of the pressure vessel according to the first embodiment of the present invention may be characterized in that the coefficient of thermal expansion of at least two of the liner, the adhesive layer, and the reinforcing layer is greater than the average.

The first synthetic resin and the second synthetic resin of the pressure vessel according to the first embodiment of the present invention may be characterized by being an epoxy resin whose thermal expansion coefficients are different from each other.

The fourth thermal expansion coefficient of the first synthetic resin of the pressure vessel according to the first embodiment of the present invention is smaller than the third thermal expansion coefficient of the second synthetic resin.

The adhesive layer of the pressure vessel according to the first embodiment of the present invention may be subjected to a surface treatment to form irregularities on the outer surface of the liner in order to improve the adhesion with the liner, 2 layer formed by applying a synthetic resin.

The adhesive layer of the pressure vessel according to the first embodiment of the present invention may be characterized in that at least a part of the second synthetic resin is embedded in a recessed portion of the concavity and convexity.

The surface treatment of the pressure vessel according to the first embodiment of the present invention may be characterized by using at least one treatment method selected from the group consisting of plasma treatment, sand blast treatment, chemical treatment and physical treatment.

A pressure vessel according to a second embodiment of the present invention comprises: a liner of a thermoplastic resin capable of filling and discharging fluid; A reinforcing layer formed on the outer side of the liner by winding of reinforcing fibers impregnated in the first synthetic resin; Wherein the adhesive layer is adhered to the liner and the reinforcing layer and is formed by an external force in a direction different from that of the wrapping line formed by winding the reinforcing fibers, wherein the adhesive layer is provided between the liner and the reinforcing layer by a second synthetic resin, And the second synthetic resin having an elongation higher than that of the first synthetic resin so as to prevent the liner from being broken due to fracture of the hardened first synthetic resin.

The elongation percentage of the second synthetic resin of the pressure vessel according to the second embodiment of the present invention may be an elongation ratio with respect to a direction corresponding to an external force in a direction different from that of the winding line formed by winding the reinforcing fiber .

The first synthetic resin and the second synthetic resin of the pressure vessel according to the second embodiment of the present invention may be characterized by being an epoxy resin having different elongation ratios.

The adhesive layer of the pressure vessel according to the second embodiment of the present invention may be subjected to a surface treatment to form irregularities on the outer surface of the liner in order to improve the adhesion with the liner, 2 layer formed by applying a synthetic resin.

The adhesive layer of the pressure vessel according to the second embodiment of the present invention may be characterized in that at least a part of the second synthetic resin is embedded in a recessed portion of the concavity and convexity.

The surface treatment of the pressure vessel according to the second embodiment of the present invention may be characterized in that at least one treatment method selected from the group consisting of plasma treatment, sandblast treatment, chemical treatment and physical treatment is used.

A pressure vessel according to a third embodiment of the present invention comprises: a liner of a thermoplastic resin capable of filling and discharging fluid; A reinforcing layer formed on the outer side of the liner by winding of reinforcing fibers impregnated in the first synthetic resin; Wherein the adhesive layer is adhered to the liner and the reinforcing layer and is formed by an external force in a direction different from that of the wrapping line formed by winding the reinforcing fibers, wherein the adhesive layer is provided between the liner and the reinforcing layer by a second synthetic resin, And the second synthetic resin having a density smaller than that of the first synthetic resin so as to prevent the liner from being broken due to fracture of the hardened first synthetic resin to be generated.

The first synthetic resin and the second synthetic resin of the pressure vessel according to the third embodiment of the present invention may be characterized in that they are epoxy resins having different densities.

The adhesive layer of the pressure vessel according to the third embodiment of the present invention may be subjected to a surface treatment for forming irregularities on the outer surface of the liner in order to improve the adhesion with the liner, 2 layer formed by applying a synthetic resin.

The adhesive layer of the pressure vessel according to the third embodiment of the present invention may be characterized in that at least a part of the second synthetic resin is embedded in a recessed portion of the concave and the convex.

It is possible to use at least one processing method selected from the group consisting of plasma processing, sandblasting, chemical processing and physical processing of the pressure vessel according to the third embodiment of the present invention.

A pressure vessel according to a fourth embodiment of the present invention comprises: a liner of a thermoplastic resin capable of filling and discharging fluid; A reinforcing layer formed on the outer side of the liner by winding of reinforcing fibers impregnated in the first synthetic resin; And an adhesive layer provided between the liner and the reinforcing layer by a second synthetic resin, wherein the adhesive layer is adhered to the liner and the reinforcing layer, and is adhered to the liner by the external force in a direction different from the winding line formed by winding the reinforcing fiber At least a part of the gap between the reinforcing fibers is buried by the second synthetic resin so as to prevent the liner from being broken by the fracture of the hardened first synthetic resin generated by the first synthetic resin.

At least a part of the boundary between the first synthetic resin and the second synthetic resin of the pressure vessel according to the fourth embodiment of the present invention is formed between the reinforcing fibers.

At least a part of the boundary between the adhesive layer and the reinforcing layer of the pressure vessel according to the fourth embodiment of the present invention is defined by the outer surface of the reinforcing fiber.

The adhesive layer of the pressure vessel according to the fourth embodiment of the present invention may be subjected to surface treatment to form irregularities on the outer surface of the liner in order to improve adhesion with the liner, 2 layer formed by applying a synthetic resin.

The adhesive layer of the pressure vessel according to the fourth embodiment of the present invention may be characterized in that at least a part of the second synthetic resin is embedded in a recessed portion of the concave and the convex.

The surface treatment of the pressure vessel according to the fourth embodiment of the present invention may be characterized in that at least one treatment method selected from the group consisting of plasma treatment, sandblast treatment, chemical treatment and physical treatment is used.

A pressure vessel according to a fifth embodiment of the present invention comprises: a liner of a non-polar thermoplastic resin capable of filling and discharging fluid; A reinforcing layer formed on the outside of the liner by reinforcing fibers impregnated in the first synthetic resin of polarity; And a polarizer applied to the outer surface of the liner to bond the first and second synthetic resins to each other to mediate adhesion between the liner and the reinforcing layer to prevent non-adhesion between the liner and the first synthetic resin due to a difference in polarity, 2 < / RTI > synthetic resin.

A pressure vessel according to a sixth embodiment of the present invention comprises: a liner of a non-polar thermoplastic resin capable of filling and discharging fluid; A reinforcing layer formed on the outside of the liner by reinforcing fibers impregnated in the first synthetic resin of polarity; And an adhesive layer provided between the liner and the reinforcing layer by a second synthetic resin having a polarity, wherein the adhesive layer is provided between the liner and the first synthetic resin to prevent non-adhesion between the liner and the first synthetic resin, (COOH) functional group, a carbonyl group (CO) functional group or both functional groups on the surface so as to mediate adhesion of the reinforcing layer.

The pressure vessel according to the present invention can prevent the fluid from collecting between the liner and the reinforcing fiber in advance.

In addition, it is possible to prevent the unpleasant odor caused by the fluid from occurring.

In addition, it is possible to prevent the liner from being broken by an external force.

Further, it is possible to secure sufficient strength to withstand the high pressure by the fluid.

In addition, the possibility of explosion by the fluid can be reduced to zero.

1 is a schematic perspective view of a pressure vessel according to a first embodiment of the present invention.
2 is a schematic perspective view showing a pressure vessel according to a second embodiment and a third embodiment of the present invention.
Fig. 3 is a schematic enlarged cross-sectional view of a portion A in Fig. 2, illustrating fracture of the reinforcing layer. Fig.
4 is another schematic enlarged cross-sectional view of part A of Fig.
5 is a graph of the theoretical rate of change of the liner with temperature change.
6 is a graph showing the range of elongation of the first synthetic resin.
7 is a graph showing the range of elongation of the second synthetic resin.
FIG. 8 is a photograph showing that the liner material is broken when only the first synthetic resin is formed on the liner.
9 is a photograph showing whether breakage occurs when a second synthetic resin is formed between the liner and the first synthetic resin.
FIG. 10 is a photograph of a first synthetic resin-reinforced layer broken when a second synthetic resin is formed between the liner and the first synthetic resin;
11 is a photograph showing that a part of the second synthetic resin as the adhesive layer is impregnated in the irregularities formed on the outer surface of the liner 210. Fig.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. 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 inventive concept. Other embodiments falling within the scope of the inventive concept may readily be suggested, but are also considered to be within the scope of the present invention.

The same reference numerals are used to designate the same components in the same reference numerals in the drawings of the embodiments.

[First Embodiment]

1 is a schematic perspective view of a pressure vessel according to a first embodiment of the present invention.

Referring to FIG. 1, the pressure vessel 100 according to the first embodiment of the present invention is a container used for storing various fluids such as oxygen, natural gas, nitrogen, hydrogen, etc., Charging and discharging are realized.

The pressure vessel 100 is provided with a liner 110 capable of filling and discharging fluid, a reinforcing layer 130 formed on the outer side of the liner 110, and a reinforcing layer 130 provided between the liner 110 and the reinforcing layer 130 The adhesive layer 120 may be formed of a metal.

Specifically, the liner 110 is made of metallic steel or non-metallic aluminum or plastic, and a nozzle boss 140, which is a passage for filling and discharging fluid, is formed from an upper mold and an injection mold The synthetic resin may be inserted into the inner space and then the synthetic resin may be introduced into the injection mold. The synthetic resin used as the material of the liner 110 may be high density polyethylene (HDPE).

The high-density polyethylene which is a material of the liner 110 is a kind of polyethylene having a low branching and high crystallinity, which is a thermoplastic resin and can have a certain range of thermal expansion coefficient.

Hereinafter, the thermal expansion coefficient of the liner 110 made of the high-density polyethylene is defined as a first thermal expansion coefficient.

The liner 110 may itself determine the strain on the basis of the first coefficient of thermal expansion, and the first coefficient of thermal expansion may be within the following range.

&Lt; Range of first thermal expansion coefficient &

11 × 10 ^-5 / ° C. to 18 × 10 ^-5 / ° C.

In the pressure vessel 100 according to the first embodiment of the present invention, when the fluid is filled, the temperature rises to about 80 ° C., and when the fluid is rapidly discharged, the pressure rises to about -40 ° C., The volume of the inner space of the liner 110 itself changes from A to B theoretically by the first thermal expansion coefficient as follows.

5 is a graph showing the theoretical strains of the liner according to the cases of -40 ° C, 23 ° C and 80 ° C. In the case of high temperature of 80 ℃, it is deformed by low stress, and the lower the temperature is, the higher the stress is applied, the liner is deformed.

However, the liner 110 may vary in strain by a reinforcing layer 130 formed on the outer side of the liner 110 and an adhesive layer 120 provided between the liner 110 and the reinforcing layer 130 , And a detailed description will be given below.

The reinforcing layer 130 may be formed of reinforcing fibers impregnated into the first synthetic resin, and the reinforcing fibers may be carbon fibers, glass fibers, synthetic polyamide fibers, or the like.

Here, the first synthetic resin may be an epoxy resin, and the reinforcing layer 130 may be formed to have a predetermined thickness by winding or laminating the reinforcing fibers impregnated in the first synthetic resin to the outside of the liner 110 have.

Meanwhile, an adhesive layer 120 may be provided between the liner 110 and the reinforcing layer 130, and the adhesive layer 120 may be formed by a second synthetic resin.

The second synthetic resin may be an epoxy resin of the same series as the first synthetic resin, but may have different thermal expansion coefficients and may be cured.

The adhesive layer 120 may be adhered to the liner 110 and the reinforcing layer 130 and the actual strain of the liner 110 may be increased by the reinforcing layer 130 Can be made smaller than the strain of the liner (110) based on the first thermal expansion coefficient.

Here, the second thermal expansion coefficient, which is the thermal expansion coefficient of the reinforcing layer 130, may be smaller than the first thermal expansion coefficient, which is the thermal expansion coefficient of the liner 110, and the third thermal expansion coefficient of the second synthetic resin, The coefficient may be smaller than the first coefficient of thermal expansion.

The fourth thermal expansion coefficient, which is the thermal expansion coefficient of the first synthetic resin, may be smaller than the third thermal expansion coefficient.

The first thermal expansion coefficient may be greater than an average of at least two thermal expansion coefficients of the liner 110, the adhesive layer 120, and the reinforcing layer 130.

The ranges of the second to fourth thermal expansion coefficients are as follows.

&Lt; Range of Second Thermal Expansion Coefficient >

4 × 10 ^-5 / ° C. to 7 × 10 ^-5 / ° C.

&Lt; Range of the third thermal expansion coefficient &

5 × 10 ^-5 / ° C. to 10 × 10 ^-5 / ° C.

&Lt; Range of Fourth Thermal Expansion Coefficient >

3 × 10 ^-5 / ° C. to 5 × 10 ^-5 / ° C.

As described above, the adhesive layer 120 formed of the second synthetic resin is bonded to the liner 110 and the reinforcing layer 130 to mediate adhesion between the liner 110 and the reinforcing layer 130, The strain of the liner 110 according to the temperature change can be minimized when the temperature changes due to the filling and discharge of the fluid.

In other words, upon filling and discharging the fluid, the liner 110 tends to expand and contract based on the first coefficient of thermal expansion, but with the actual deformation < RTI ID = 0.0 > The liner 110 and the reinforcing layer 130 can be realized by the adhesive layer 120 adhered to the liner 110 and the reinforcing layer 130, respectively.

In addition, the adhesive layer 120 may minimize the strain of the liner 110 by the reinforcing layer 130, and reduce the degree of deformation of the liner 110 itself.

This is because when the liner 110 is to be deformed based on the first thermal expansion coefficient, the third thermal expansion coefficient which is the thermal expansion coefficient of the second synthetic resin constituting the adhesive layer 120 is smaller than the first thermal expansion coefficient, (110).

The adhesive layer 120 may be subjected to a surface treatment to form concavities and convexities 112 on the outer surface of the liner 110 to improve adhesion with the liner 110, And a layer formed by coating the second synthetic resin on the outer surface.

Here, the surface treatment may use any one or more treatment methods selected from the group consisting of plasma treatment, sandblast treatment, chemical treatment, and physical treatment. Hereinafter, the plasma treatment will be described as an example.

The outer surface of the liner 110 may be heat treated with plasma to maximize the bonding force with the applied second synthetic resin. When the outer surface of the liner 110 is heat-treated using oxygen plasma, Oxygen radicals and atomic molecules are irradiated with high energy and become activated and charged.

The outer surface of the charged liner 110 can be easily combined with the second synthetic resin so that the reinforcing fibers impregnated in the liner 110, the second synthetic resin, and the first synthetic resin can be integrated It is.

At least a part of the outer surface of the liner 110 subjected to the plasma heat treatment may have unevenness 112 and at least a part of the second synthetic resin may be embedded in the recessed portion of the unevenness 112, And a layer formed thereon.

As described above, since the adhesive layer 120 is adhered to the liner 110 and the reinforcing layer 130, the pressure vessel 100 according to the first embodiment of the present invention is bonded between the liner 110 and the reinforcing layer 130 The gap can be blocked in advance, thereby preventing the fluid from being trapped between the liner 110 and the reinforcing layer 130, thereby preventing an unpleasant smell from being caused by the fluid.

Also, the stiffness is improved due to an increase in adhesion between the reinforcing layer 130 and the liner 110, and sufficient strength sufficient to withstand the high pressure by the fluid can be ensured.

[Second Embodiment]

FIG. 2 is a schematic perspective view showing a pressure vessel according to a second embodiment and a third embodiment of the present invention. FIG. 3 is a schematic enlarged cross-sectional view of part A of FIG. FIG.

2 and 3, the pressure vessel 200 according to the second embodiment of the present invention includes a liner 210 capable of filling and discharging a fluid, and a liner 210, through which the reinforcing fibers impregnated into the first synthetic resin are wound, A reinforcing layer 230 formed on the outer side of the reinforcing layer 210 and an adhesive layer 220 provided between the liner 210 and the reinforcing layer 230 by a second synthetic resin.

The first synthetic resin and the second synthetic resin may be epoxy-based resins having different elongation ratios.

The adhesive layer 220 may be adhered to the liner 210 and the reinforcing layer 230. The adhesive layer 220 may be adhered to the liner 210 and the reinforcing layer 230, The second synthetic resin having an elongation greater than that of the first synthetic resin so that the liner 210 is prevented from being broken by the fracture P of the first synthetic resin.

Here, the elongation percentage of the second synthetic resin may be an elongation ratio with respect to a direction corresponding to the external force F in a direction different from the winding line L formed by winding the reinforcing fibers.

In the pressure vessel 200 according to the second embodiment of the present invention, the stiffness is improved by the reinforcing layer 230 formed by winding the reinforcing fibers impregnated into the first synthetic resin. However, It is relatively inferior to the external force F of FIG.

The external force F is transmitted to the liner 210 through the adhesive layer 220. When the external force F is applied to the liner 210 in a direction different from the direction in which the first synthetic resin is cured, The pressure vessel according to the second embodiment prevents the liner 210 from being broken by the adhesive layer 220.

Specifically, when the external force exceeding the range of the elongation of the cured first synthetic resin is applied, the cured first synthetic resin is broken (P), but the second synthetic resin having an elongation higher than that of the first synthetic resin, The rupture does not occur.

That is, even if an external force for breaking the cured first synthetic resin is applied to the pressure vessel 200, the external force is within the range of the elongation of the second synthetic resin, so that the liner 210 is not broken.

Here, the elongation ratios of the first synthetic resin and the second synthetic resin are the same as those of the graphs of FIGS. 6 and 7, specifically, the elongation of the first synthetic resin is 3 to 5% and the elongation of the second synthetic resin is 5 to 15%.

The liner containing high density polyethylene (HDPE) has an elongation of 600% and a maximum elongation in the tank of less than 1 to 2% of the working pressure. Figs. 8 to 10 are photographs showing results of fatigue tests at low temperature (-50 DEG C) for the first synthetic resin formed outside the liner material and the second synthetic resin formed between the liner material and the first synthetic resin. In the case of Fig. 7 in which only the first synthetic resin is formed outside the liner material, the liner material is broken due to the low elongation of the first synthetic resin, but the second synthetic resin is formed as the reinforcing layer between the liner material and the first synthetic resin. 9, the liner material did not fracture in Fig. 8, and only the reinforcing layer of the first synthetic resin broke in Fig. That is, the second synthetic resin is bonded to the liner until the liner is stretched, so that the liner can be prevented from being broken.

The adhesive layer 220 may be subjected to a surface treatment to form irregularities on the outer surface of the liner 210 in order to improve adhesion with the liner 210, And a layer formed by applying a second synthetic resin, and the surface treatment may use at least one of a plasma treatment, a sandblast treatment, a chemical treatment, and a physical treatment.

The adhesive layer 220 may include a layer formed by embedding at least a part of the second synthetic resin in the recessed portion of the concavity and convexity 212.

The detailed description will be replaced with the first embodiment.

[Third Embodiment]

2 and 3, the pressure vessel 200 according to the third embodiment of the present invention includes a liner 210 of a thermoplastic resin capable of filling and discharging a fluid, A reinforcing layer 230 formed on the outer side of the liner and an adhesive layer 220 provided between the liner 210 and the reinforcing layer 230 by a second synthetic resin.

The first synthetic resin and the second synthetic resin may be epoxy resins having different densities.

The adhesive layer 220 may be adhered to the liner 210 and the reinforcing layer 230. The adhesive layer 220 may be adhered to the liner 210 and the reinforcing layer 230, The second synthetic resin having a density smaller than that of the first synthetic resin to prevent the liner 210 from being broken by the fracture P of the first synthetic resin.

Here, the density ranges of the first synthetic resin and the second synthetic resin are as follows.

&Lt; Density range of first synthetic resin &

1.2 to 1.25 g / cm < ³ >

&Lt; Density range of second synthetic resin &

1.1 to 1.2 g / cm < ³ >

As described above, since the density of the second synthetic resin composing the adhesive layer 220 is smaller than that of the first synthetic resin used for the reinforcing layer 230, the external force F for breaking the cured first synthetic resin is applied to the pressure vessel 200, The rupture of the liner 210 does not occur due to the external force.

The adhesive layer 220 may be subjected to a surface treatment to form irregularities on the outer surface of the liner 210 in order to improve adhesion with the liner 210, And a layer formed by applying a second synthetic resin. The surface treatment may use at least one treatment method selected from the group consisting of plasma treatment, sandblast treatment, chemical treatment and physical treatment.

The detailed description will be replaced with the first embodiment.

[Fourth Embodiment]

4 is another schematic enlarged cross-sectional view of part A of Fig.

2 and 4, a pressure vessel according to a fourth embodiment of the present invention includes a liner 310 made of a thermoplastic resin capable of filling and discharging a fluid, A reinforcing layer 330 formed on the outer side of the reinforcing layer 330 and a bonding layer 320 provided between the liner 310 and the reinforcing layer 330 by the second synthetic resin.

The first synthetic resin and the second synthetic resin may be an epoxy resin having at least one of elongation and density being different from each other.

The adhesive layer 320 may be adhered to the liner 310 and the reinforcing layer 330. The adhesive layer 320 may be adhered to the liner 310 and the reinforcing layer 330, At least a part of the gap between the reinforcing fibers may be filled with the second synthetic resin so as to prevent the liner from being broken by the fracture (P) of the first synthetic resin.

The adhesive layer 320 may be subjected to a surface treatment to form irregularities on the outer surface of the liner 210 in order to improve adhesion with the liner 210, And the surface treatment may use at least one treatment method selected from the group consisting of plasma treatment, sandblast treatment, chemical treatment and physical treatment. When the application of the second synthetic resin is completed, the reinforcing layer 330 is formed by winding the reinforcing fibers impregnated into the first synthetic resin.

Here, when the reinforcing fibers impregnated into the first synthetic resin are wound, the second synthetic resin applied to the outer surface of the liner 310 is introduced into at least a part of the gap between the reinforcing fibers by the pressing force by the winding, And becomes hardened.

At least a part of the boundary between the adhesive layer 320 and the reinforcing layer 330 may be formed between the reinforcing fibers 330 and the reinforcing fibers 330. [ As shown in FIG.

Therefore, even when the first synthetic resin which is hardened by the external force in the direction different from the winding line formed by the winding of the reinforcing fibers due to the second synthetic resin embedded in at least a part of the gap between the reinforcing fibers is broken, The rupture of the substrate 310 does not occur.

11, the adhesive layer 320 may include a layer formed by embedding at least a part of the second synthetic resin in a recessed portion of the concavity and convexity 312.

The detailed description will be replaced with the first embodiment.

[Fifth Embodiment]

In describing the fifth embodiment of the present invention, the description will be made with reference to Fig.

The pressure vessel 100 according to the fifth embodiment of the present invention includes a liner 110 made of a non-polar thermoplastic resin capable of filling and discharging a fluid, a reinforcing fiber impregnated in a first polar synthetic resin, The liner 110 and the reinforcing layer 130 are adhered to the first synthetic resin having a polarity so as to prevent non-adhesion between the liner 110 and the first synthetic resin due to the difference in polarity, And an adhesive layer 120 formed of a second synthetic resin having a polarity applied to an outer surface of the liner 110 to mediate adhesion of the liner 130.

The adhesive layer 120 may be subjected to a surface treatment to form irregularities on the outer surface of the liner 210 in order to improve adhesion with the liner 210, And the surface treatment may use at least one treatment method selected from the group consisting of plasma treatment, sandblast treatment, chemical treatment and physical treatment. For example, the outer surface of the liner 110 may be heat treated with a plasma to maximize the bonding force with the applied second synthetic resin. When the outer surface of the liner 110 is heat- The oxygen radicals or atomic molecules are irradiated with a high energy so that the polar functional group is introduced to the outer surface of the liner 110. [

In other words, the activated electric charge formed on the outer surface of the liner 110 may cause the outer surface of the liner 110 to have a polarity, so that the polarity second synthetic resin coated on the outer surface of the liner 110, Can be maximized.

The reinforcing fibers impregnated into the liner 110, the second synthetic resin, and the first synthetic resin are bonded to each other through the adhesive force of the first synthetic resin and the second synthetic resin, Can be maximized and integrated.

The adhesive layer 120 may include a layer formed by applying the second synthetic resin to a portion of the outer surface of the liner 110 that is thermally treated with plasma and may be formed on the outer surface of the liner 110 subjected to the plasma heat treatment At least a part of which may have irregularities.

The adhesive layer 120 may include a layer formed by embedding at least a part of the second synthetic resin in a recessed portion of the concavity and convexity.

Polymer type permittivity Liner HDPE (High Density Polyethylene) 2.3 PA6 (polyamide 6) 3 The first synthetic resin Bisphenol-A Type 4.2 The second synthetic resin Bisphenol-F type 4.5

The dielectric constant of the polymer itself is 2.3 and 3 (PA6), and the dielectric constant of the polymer itself is shown in Table 1. The dielectric constant of the liner, the first synthetic resin, and the second synthetic resin are shown in Table 1, and the high molecular polyethylene (HDPE) But it is polarized by the plasma heat treatment and the adhesive strength can be maximized by the first synthetic resin and the second synthetic resin having polarity.

The detailed description will be replaced with the first embodiment.

[Sixth Embodiment]

In describing the sixth embodiment of the present invention, the description will be made with reference to Fig.

The pressure vessel 100 according to the sixth embodiment of the present invention includes a liner 110 made of a non-polar thermoplastic resin capable of filling and discharging fluid, a reinforcing fiber impregnated in the first synthetic resin having a polarity, And a bonding layer 120 provided between the liner 110 and the reinforcing layer 130 by a second synthetic resin having a polarity.

The adhesive layer 120 is formed on the surface of the liner 110 so as to mediate adhesion between the liner 110 and the reinforcing layer 130 to prevent adhesion between the liner 110 and the first synthetic resin due to a difference in polarity, (COOH) functional group, a carbonyl group (CO) functional group, or both functional groups.

At least one of the carboxyl group (COOH) functional group and the carbonyl group (CO) functional group may be formed on one side of the adhesive layer 120 that is in contact with the liner 110.

A polar functional group is introduced into the outer surface of the liner 110 by a plasma heat treatment and the surface of the adhesive layer 120 contains a carboxyl group (COOH) group, a carbonyl group (CO) group or both functional groups, The polarity effect of the polar functional group introduced into the outer surface of the adhesive layer and the polarity effect of the carboxyl group and the carbonyl group contained in the surface of the adhesive layer improve the adhesion.

The adhesive layer 120 may include a layer formed by applying the second synthetic resin to a portion of the outer surface of the liner 110 that is thermally treated with plasma and may be formed on the outer surface of the liner 110 subjected to the plasma heat treatment At least a part of which can be provided with concave and convex portions 112.

The adhesive layer 120 may include a layer formed by embedding at least a part of the second synthetic resin in a recessed portion of the concavity and convexity. As described above, since the adhesive layer is embedded in the recessed portion of the concavity and convexity 112, the adhesive force is improved as compared with the case where there is no unevenness on the outer surface of the liner.

The detailed description will be replaced with the first embodiment.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be apparent to those skilled in the art that changes or modifications may fall within the scope of the appended claims.

100: pressure vessel
110: Liner
120: adhesive layer
130: reinforced layer

Claims

A liner of a thermoplastic resin capable of filling and discharging the fluid and having a strain determined based on the first thermal expansion coefficient;
A reinforcing layer formed on the outside of the liner by reinforcing fibers impregnated in the first synthetic resin; And
And an adhesive layer provided between the liner and the reinforcing layer by a second synthetic resin,
The outer surface of the liner is provided with concavities and convexities by surface treatment to improve the adhesive strength,
The adhesive layer
Wherein a strain of the liner adhered to the liner and the reinforcing layer is smaller than a strain of the liner based on the first coefficient of thermal expansion by the reinforcing layer at a temperature change due to filling and discharging of the fluid,
The first thermal expansion coefficient of the liner is in the range of 11 10 ^-5 / ° C to 18 10 ^-5 /
The second thermal expansion coefficient of the reinforcing layer is in the range of 4 x 10 ^-5 / ° C to 7 x 10 ^-5 /
The third thermal expansion coefficient of the second synthetic resin is in the range of 5 x 10 ^-5 / ° C to 10 x 10 ^-5 /
And a fourth thermal expansion coefficient of the first synthetic resin is in the range of 3 × 10 ^-5 / ° C. to 5 × 10 ^-5 / ° C.

delete

The method according to claim 1,
Wherein the first thermal expansion coefficient is larger than an average of thermal expansion coefficients of at least two of the liner, the adhesive layer, and the reinforcing layer.

The method according to claim 1,
Wherein the first synthetic resin and the second synthetic resin are epoxy resins.

delete

The method according to claim 1,
Wherein the adhesive layer comprises a layer formed by applying the second synthetic resin to an outer surface of the surface-treated liner.

8. The method of claim 7,
Wherein the adhesive layer comprises a layer in which at least a part of the second synthetic resin is embedded in the recessed portion of the concave and the convex.

9. The method according to claim 7 or 8,
Wherein the surface treatment uses at least one treatment method selected from the group consisting of a plasma treatment, a sand blast treatment and a chemical treatment.

A liner of thermoplastic resin capable of filling and discharging fluid;
A reinforcing layer formed on the outer side of the liner by winding of reinforcing fibers impregnated in the first synthetic resin; And
And an adhesive layer provided between the liner and the reinforcing layer by a second synthetic resin,
The outer surface of the liner is provided with concavities and convexities by surface treatment to improve the adhesive strength,
The adhesive layer
And the first liner is bonded to the liner and the reinforcing layer, and the liner is cut by the fracture of the hardened first synthetic resin generated by an external force in a direction different from the winding line formed by winding of the reinforcing fiber, The second synthetic resin having an elongation greater than that of the synthetic resin,
Wherein the elongation of the first synthetic resin is 3 to 5% and the elongation of the second synthetic resin is 5 to 15%.

11. The method of claim 10,
Wherein the elongation percentage of the second synthetic resin is an elongation ratio in a direction corresponding to an external force in a direction different from that of the winding line formed by winding the reinforcing fiber.

11. The method of claim 10,
Wherein the first synthetic resin and the second synthetic resin are epoxy resins.

11. The method of claim 10,
Wherein the adhesive layer comprises a layer formed by applying the second synthetic resin to an outer surface of the surface-treated liner.

14. The method of claim 13,
Wherein the adhesive layer comprises a layer in which at least a part of the second synthetic resin is embedded in the recessed portion of the concave and the convex.

The method according to claim 13 or 14,
Wherein the surface treatment uses at least one treatment method selected from the group consisting of a plasma treatment, a sand blast treatment and a chemical treatment.

A liner of thermoplastic resin capable of filling and discharging fluid;
A reinforcing layer formed on the outer side of the liner by winding of reinforcing fibers impregnated in the first synthetic resin; And
And an adhesive layer provided between the liner and the reinforcing layer by a second synthetic resin,
The outer surface of the liner is provided with concavities and convexities by surface treatment to improve the adhesive strength,
The adhesive layer
And the first liner is bonded to the liner and the reinforcing layer, and the liner is cut by the fracture of the hardened first synthetic resin generated by an external force in a direction different from the winding line formed by winding of the reinforcing fiber, The second synthetic resin having a density smaller than that of the synthetic resin,
Wherein the density of the first synthetic resin is in the range of 1.2 to 1.25 g / cm 3, and the density of the second synthetic resin is in the range of 1.1 to 1.2 g / cm 3.

17. The method of claim 16,
Wherein the first synthetic resin and the second synthetic resin are epoxy resins.

17. The method of claim 16,
Wherein the adhesive layer comprises a layer formed by applying the second synthetic resin to an outer surface of the surface-treated liner.

19. The method of claim 18,
Wherein the adhesive layer comprises a layer in which at least a part of the second synthetic resin is embedded in the recessed portion of the concave and the convex.

20. The method according to claim 18 or 19,
Wherein the surface treatment uses at least one treatment method selected from the group consisting of a plasma treatment, a sand blast treatment and a chemical treatment.

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