Movable flexible oil bag and preparation method thereof

Abstract

The application provides a movable flexible oil bag, comprising a bag body; the bag body comprises an outer bag and an inner bag arranged in sequence; the outer bag comprises a seawater-resistant layer, a first adhesive layer, a first load-bearing fabric layer and a first heat-seal coating layer arranged in sequence from outside to inside; and the inner bag comprises a second heat-seal coating layer, a second load-bearing fabric layer, a second adhesive layer and an oil-resistant layer arranged in sequence from outside to inside. Compared with the prior art, the bag body has good oil resistance, seawater resistance and chemical corrosion resistance, and also has the characteristics of light weight, high strength, puncture resistance, wear resistance and easy welding forming, so that the movable flexible oil bag made of the bag body can effectively solve the defects of the current fixed oil depot, such as poor seawater corrosion resistance, easy attack, high requirement for terrain, high construction cost and inability to move, and greatly improves the navy's ocean oil supply capacity and island oil logistics support capacity.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of oil and gas exploitation, and particularly relates to a movable flexible oil bag and a preparation method thereof. BACKGROUND

[0002] The movable flexible oil bag is a brand-new oil / water storage and supply equipment, which has multiple functions such as oil filling, oil transportation, oil storage, oil supply, water storage, water supply and mobile transfer, and fully plays the mobile and convenient role of combination of peace and war. When used in underwater environment, compared with onshore and offshore oil storage, the movable flexible oil bag can save the expensive platform construction cost, and has unlimited storage capacity and great oil storage capacity. The underwater oil storage has good safety and sealing, and because the bag body is located below the water surface, the oil and gas loss is small, the oil and gas is isolated from fire and lightning, is not easy to catch fire, and the storage is safe, so that the fire and explosion accidents can be avoided, and the movable flexible oil bag is very suitable for the changeable marine environment. Furthermore, because the bag body is located underwater, the influence of wave flow on the bag body can be effectively avoided, and the wave force is small. In addition, the ocean current is flat on the seabed, and the stress on the bag body structure is small, so that the installation and construction are convenient, and the huge pile of the platform is not needed. When the transfer is needed, air is introduced into the bag body, the bag body can be integrally transferred, and the safe transfer of the bag body is easily realized, so that the mobility, concealment and anti-attack of the oil storage bag body are fully realized.

[0003] However, there are many problems in the marine oil and gas exploitation and fuel oil storage, such as that the seabed oil tank is easily corroded by seawater, the construction cost is extremely expensive, and the requirements for the marine depth and seabed flatness are extremely high. How to quickly and systematically solve the problems of oil supply and storage becomes a difficult problem of offshore engineering. If a non-metallic flexible material is used to preform a foldable and integrally transportable oil storage system on the shore, and the oil storage system can be quickly installed on the sea, the ocean supply capacity can be greatly improved.

[0004] The current oil field development is developing towards deep sea and far sea, and the underwater oil storage technology can greatly simplify the development engineering system. The underwater oil storage mode can be applied to the construction of the national crude oil strategic reserve base due to its great oil storage capacity. Therefore, the research and design of the underwater oil storage bag body have important practical significance for the national defense construction and national power development of China. SUMMARY

[0005] Therefore, the present application aims to solve the technical problem, and provides a movable flexible oil bag and a preparation method thereof. The movable flexible oil bag has good oil resistance, seawater resistance and chemical resistance, and also has the characteristics of light weight, high strength, puncture resistance, wear resistance and easy welding forming, effectively solves the defects of the current fixed oil depot such as seawater corrosion resistance, easy attack, high requirement for terrain, high construction cost and immobility, and greatly improves the ocean oil supply capacity of the navy and the island oil logistics support capacity.

[0006] The application provides a movable flexible oil bag, comprising a bag body;

[0007] The bag body comprises an outer bag and an inner bag arranged in sequence;

[0008] The outer bag comprises, from outside to inside, a seawater-resistant layer, a first adhesive layer, a first load-bearing fabric layer and a first heat-seal coating layer arranged in sequence;

[0009] The inner bag comprises, from outside to inside, a second heat-seal coating layer, a second load-bearing fabric layer, a second adhesive layer and an oil-resistant layer.

[0010] Preferably, the thickness of the seawater-resistant layer is 0.2-0.3 mm;

[0011] The thickness of the first adhesive layer and the second adhesive layer is independently 0.04-0.06 mm;

[0012] The thickness of the first load-bearing fabric layer and the second load-bearing fabric layer is independently 1.0-1.5 mm;

[0013] The thickness of the first heat-seal coating layer and the second heat-seal coating layer is independently 0.08-0.10 mm;

[0014] The thickness of the oil-resistant layer is 0.1-0.25 mm.

[0015] Preferably, the seawater-resistant layer is one or more of a polyether polyurethane layer, a polyvinyl fluoride layer and a polyvinylidene fluoride layer; the areal density of the seawater-resistant layer is 20-30 g / m 2 ;

[0016] The oil-resistant layer is a polyvinyl fluoride layer and / or a polyvinylidene fluoride layer; the areal density of the oil-resistant layer is 10-25 g / m 2 .

[0017] Preferably, the first adhesive layer and the second adhesive layer are independently a two-component polyurethane adhesive layer; the two-component polyurethane adhesive layer is formed by a two-component polyurethane adhesive; the two-component polyurethane adhesive comprises a main agent and a curing agent; the mass ratio of the main agent to the curing agent is (1-10):1.

[0018] Preferably, the first load-bearing fabric layer and the second load-bearing fabric layer are aramid fiber fabric layers; the areal density of the aramid fiber fabric layer is 100-150 g / m 2 ; the tensile strength of the aramid fiber used in the aramid fiber fabric layer is greater than or equal to 1000 N / cm.

[0019] Preferably, the first heat-seal coating layer and the second heat-seal coating layer are independently selected from a polyurethane coating layer; the viscosity of the polyurethane coating layer is 200-300 mPa·s.

[0020] Preferably, a separation support layer is arranged between the outer bag and the inner bag; the separation support layer is a porous thermoplastic elastomer layer.

[0021] Preferably, the areal density of the bag body is 300-480 g / m 2 ;

[0022] The oil and gas permeation amount of the bag body is less than or equal to 10 g / m 2 ·24h;

[0023] The peeling strength between the inner bag and the outer bag of the bag body is greater than or equal to 2.0 kN / m;

[0024] The burst strength of the bag body is greater than or equal to 6000 N;

[0025] The tensile strength of the bag body at room temperature is greater than or equal to 1000 N / cm;

[0026] The tensile strength of the bag body at -30℃ and 80℃ is greater than or equal to 900 N / cm;

[0027] The tensile strength of the bag body after salt spray corrosion for 200h is greater than or equal to 800 N / cm.

[0028] The application also provides a preparation method of the movable flexible oil bag, comprising the following steps:

[0029] S1) coating a two-component polyurethane adhesive on the surface of the seawater-resistant layer, then laminating the first load-bearing fabric layer, and then coating a polyurethane coating on the surface of the first load-bearing fabric layer to obtain an outer bag;

[0030] coating a two-component polyurethane adhesive on the surface of the oil-resistant layer, then laminating the second load-bearing fabric layer, and then coating a polyurethane coating on the surface of the second load-bearing fabric layer to obtain an inner bag;

[0031] S2) laminating and hot pressing the polyurethane coating of the outer bag and the polyurethane coating of the inner bag to obtain a movable flexible oil bag.

[0032] Preferably, the step S2) is specifically: laminating and hot pressing the polyurethane coating of the outer bag and the polyurethane coating of the inner bag with the two sides of the separation support layer respectively to obtain a movable flexible oil bag; the separation support layer is a porous thermoplastic elastomer layer;

[0033] The lamination temperature during the preparation of the outer bag is 100-200℃; the pressure is 0.5-2 MPa;

[0034] The lamination temperature during the preparation of the inner bag is 100-150℃; the pressure is 0.5-2 MPa;

[0035] The temperature of the hot pressing is 100-180 DEG C, the pressure of the hot pressing is 0.1-0.5 MPa, and the time of the hot pressing is 10-20 s.

[0036] The present application provides a kind of movable flexible oil bag, including bag body;The bag body includes outer bag and inner bag sequentially;The outer bag includes seawater resistant layer, first adhesive layer, first load-bearing fabric layer and first heat-seal coating layer sequentially from outside to inside;The inner bag includes second heat-seal coating layer, second load-bearing fabric layer, second adhesive layer and oil resistant layer sequentially from outside to inside.Compared with prior art, the bag body provided by the present application has good oil resistance, seawater resistance and chemical corrosion resistance, and also has the characteristics of lightweight, high strength, puncture resistance, wear resistance and easy welding molding.The movable flexible oil bag made of the oil bag body can effectively solve the defects of current fixed oil depot, such as not resistant to seawater corrosion, vulnerable to attack, high terrain requirement, high construction cost and inability to maneuver, greatly improving the navy's ocean oil supply capacity and island oil logistics support capacity. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 The design drawing of the underwater oil storage bag body provided by the present application is provided;

[0038] Figure 2 The bag body dissection drawing provided by the present application is provided;

[0039] Figure 3 The structure schematic diagram of the outer bag provided by the present application is provided;

[0040] Figure 4 The structure schematic diagram of the inner bag provided by the present application is provided;

[0041] Figure 5 The structure schematic diagram of the bag body provided by the present application is provided. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below, obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0043] The present application provides a kind of movable flexible oil bag, including bag body;The bag body includes outer bag and inner bag sequentially;The outer bag includes seawater resistant layer, first adhesive layer, first load-bearing fabric layer and first heat-seal coating layer sequentially from outside to inside;The inner bag includes second heat-seal coating layer, second load-bearing fabric layer, second adhesive layer and oil resistant layer sequentially from outside to inside.

[0044] ReferenceFigures 1-5 , Figure 1 is a design drawing of the underwater oil storage bag body; Figure 2 is a bag body anatomical drawing; Figure 3 is a structural schematic view of the outer bag provided by the present application; Figure 4 is a structural schematic view of the inner bag provided by the present application; Figure 5 is a structural schematic view of the bag body provided by the present application.

[0045] The movable flexible oil bag provided by the present application is divided into two layers, and the outer bag and the inner bag are arranged from outside to inside.

[0046] The outer bag comprises, from outside to inside, a seawater-resistant layer, a first adhesive layer, a first load-bearing fabric layer and a first heat-seal coating layer arranged in sequence; the thickness of the seawater-resistant layer is preferably 0.2-0.3 mm, more preferably 0.2-0.25 mm; the seawater-resistant layer is preferably one or more of a polyether polyurethane layer, a polyvinyl fluoride layer and a polyvinylidene fluoride layer; the areal density of the seawater-resistant layer is preferably 20-30 g / m 2 , more preferably 20-25 g / m 2 ; in the embodiments provided by the present application, the areal density of the seawater-resistant layer is specifically 25 g / m 2 , 30 g / m 2 , 20 g / m 2 ; the thickness of the first adhesive layer is preferably 0.04-0.06 mm, more preferably 0.04-0.05 mm; the first adhesive layer is preferably a two-component polyurethane adhesive layer; the two-component polyurethane adhesive layer is formed by a two-component polyurethane adhesive; the two-component polyurethane adhesive preferably comprises a main agent and a curing agent; the mass ratio of the main agent to the curing agent is preferably (1-10):1, more preferably (1-8):1, and more preferably (1-5):1; in the embodiments provided by the present application, the mass ratio of the main agent to the curing agent is specifically 5:1, 6:1, 3:1, 10:1 or 1:1; the thickness of the first load-bearing fabric layer is preferably 1.0-1.5 mm; the first load-bearing fabric layer is preferably an aramid fiber fabric layer; the areal density of the aramid fiber fabric layer is preferably 100-150 g / m 2 ; in the embodiments provided by the present application, the areal density of the aramid fiber fabric layer is preferably 100 g / m 2 , 135 g / m 2 , 125 g / m 2 , 135 g / m 2 or 150 g / m 2; the tensile strength of the aramid fiber used in the aramid fiber fabric layer is preferably greater than or equal to 1000 N / cm; the thickness of the first heat-seal coating layer is preferably 0.08-0.10 mm; the first heat-seal coating layer is preferably a polyurethane coating layer; the viscosity of the polyurethane coating layer is preferably 200-300 mPa·s; in the embodiments provided in the present application, the viscosity of the polyurethane coating layer is specifically 240 mPa·s, 260 mPa·s, 200 mPa·s, or 300 mPa·s.

[0047] The inner capsule comprises, from outside to inside, a second heat-seal coating layer, a second load-bearing fabric layer, a second adhesive layer, and an oil-resistant layer arranged in sequence; the thickness of the second heat-seal coating layer is preferably 0.08-0.10 mm; the second heat-seal coating layer is preferably a polyurethane coating layer; the polyurethane coating layer is formed of polyurethane; the number average molecular weight of the polyurethane is preferably 35,000-50,000, more preferably 40,000-50,000, and still more preferably 45,000; the viscosity of the polyurethane is preferably 200-300 mPa·s; in the embodiments provided in the present application, the viscosity of the polyurethane is preferably 220 mPa·s, 240 mPa·s, 300 mPa·s, 280 mPa·s, or 200 mPa·s; the thickness of the second load-bearing fabric layer is preferably 1.0-1.5 mm; the second load-bearing fabric layer is preferably an aramid fiber fabric layer; the areal density of the aramid fiber fabric layer is preferably 100-150 g / m 2 ; in the embodiments provided in the present application, the areal density of the aramid fiber fabric layer is specifically 130 g / m 2 , 135 g / m 2 , 150 g / m 2 , 100 g / m 2 ; the tensile strength of the aramid fiber used in the aramid fiber fabric layer is preferably greater than or equal to 1000 N / cm; the thickness of the second adhesive layer is preferably 0.04-0.06 mm, and more preferably 0.04-0.05 mm; the second adhesive layer is preferably a bicomponent polyurethane adhesive layer; the bicomponent polyurethane adhesive layer is formed of a bicomponent polyurethane adhesive; the bicomponent polyurethane adhesive preferably comprises a main agent and a curing agent; the mass ratio of the main agent to the curing agent is preferably (1-10):1, more preferably (1-8):1, and still more preferably (1-5):1; in the embodiments provided in the present application, the mass ratio of the main agent to the curing agent is preferably 5:1, 6:1, 8:1, 1:1, or 10:1; the thickness of the oil-resistant layer is preferably 0.1-0.25 mm; the oil-resistant layer is preferably a polyvinyl fluoride layer and / or a polyvinylidene fluoride layer; the areal density of the oil-resistant layer is preferably 10-30 g / m 2 , and more preferably 20-25 g / m 2In the embodiments provided in the present application, the area density of the oil-resistant layer is specifically 15 g / m 2 , 18 g / m 2 , 10 g / m 2 , 30 g / m 2 .

[0048] In the present application, the isolation support layer is further arranged between the outer capsule and the inner capsule; the isolation support layer can realize the spatial separation between the inner capsule and the outer capsule, has a simple structure and is easy to disassemble; the thickness of the isolation support layer is preferably 0.5-3.0 mm, more preferably 1-3 mm, and more preferably 1.5-3 mm; the isolation support layer is preferably a porous thermoplastic elastomer layer, and more preferably a porous thermoplastic polyurethane elastomer layer; the number average molecular weight of the porous thermoplastic elastomer is preferably 20,000-70,000, more preferably 30,000-70,000, more preferably 40,000-60,000, and most preferably 48,000-60,000; in the present application, the isolation support layer can be a complete layer, a block structure, or a hollow structure.

[0049] In the present application, the area density of the capsule body is preferably 300-480 g / m 2 ; the oil and gas permeation amount of the capsule body is preferably less than or equal to 10 g / m 2 ·24 h; the peeling strength between the inner capsule and the outer capsule of the capsule body is preferably greater than or equal to 2.0 kN / m; the burst strength of the capsule body is preferably greater than or equal to 6,000 N; the tensile strength of the capsule body at room temperature is preferably greater than or equal to 1,000 N / cm; the tensile strength of the capsule body at-30℃ and 80℃ is preferably greater than or equal to 900 N / cm; and the tensile strength of the capsule body after salt spray corrosion for 200 h is preferably greater than or equal to 800 N / cm.

[0050] The capsule body provided in the present application has good oil resistance, seawater resistance and chemical corrosion resistance, and also has the characteristics of light weight, high strength, puncture resistance, wear resistance and easy welding and molding. The movable flexible oil capsule made of the oil capsule body can effectively solve the defects of the current fixed oil depot, such as poor seawater corrosion resistance, easy to be attacked, high requirement for terrain, high construction cost and inability to move, and greatly improves the ocean oil supply capacity of the navy and the island oil logistics support capacity.

[0051] The application further provides a preparation method of the movable flexible oil bag, comprising the following steps: S1) coating a two-component polyurethane adhesive on the surface of the seawater-resistant layer, then laminating the first load-bearing fabric layer, and then coating a polyurethane coating on the surface of the first load-bearing fabric layer to obtain an outer bag; coating a two-component polyurethane adhesive on the surface of the oil-resistant layer, then laminating the second load-bearing fabric layer, and then coating a polyurethane coating on the surface of the second load-bearing fabric layer to obtain an inner bag; S2) laminating and hot-pressing the polyurethane coating of the outer bag and the polyurethane coating of the inner bag to obtain the movable flexible oil bag.

[0052] In the application, all raw materials are commercially available without special restrictions; the seawater-resistant layer, the two-component polyurethane adhesive, the first load-bearing fabric layer, the polyurethane coating, the oil-resistant layer and the second load-bearing fabric layer are the same as described above, and will not be described here.

[0053] In the application, the seawater-resistant layer is formed by one or more of polyether polyurethane, polyvinyl fluoride and polyvinylidene fluoride; the polyether polyurethane is well known to those skilled in the art and is not subject to special restrictions, and the number average molecular weight of the polyether polyurethane is preferably 50000-60000, more preferably 50000; in the examples provided by the application, the polyether polyurethane preferably uses polytetrahydrofuran ether diol as a soft segment, 4,4-diphenyl methane diisocyanate monomer as a hard segment, and diol as a chain extender; the n(OH):n(NCO) ratio of the soft segment and the hard segment in the preparation of the polyether polyurethane is preferably (1.5-3):1, more preferably 2:1; the soft segment and the hard segment are preferably first reacted in a protective atmosphere to obtain a polyurethane prepolymer, and then a chain extender is added for continued reaction to obtain the polyether polyurethane; the chain extender is preferably butanediol, more preferably 1,4-butanediol; the molar ratio of NCO in the polyurethane prepolymer to the chain extender is preferably (1-2.5):1, more preferably (1-2):1, more preferably (1-1.5):1, and most preferably (1.01-1.12):1; the reaction temperature is preferably 60-80°C; the reaction time is preferably 2-5h, more preferably 3-4h; the continued reaction temperature is preferably 90-110°C, more preferably 100°C; the continued reaction time is preferably 1-3h, more preferably 2h; the number average molecular weight of the polyvinyl fluoride is preferably 40000-50000, more preferably 45000; and the number average molecular weight of the polyvinylidene fluoride is more preferably 40000-50000, more preferably 45000. In the examples provided by the application, the seawater-resistant layer is obtained by film blowing of the above-mentioned resin.

[0054] Then the surface of the seawater resistant layer is preferably subjected to corona treatment, and then coated with a two-component polyurethane adhesive; the discharge power of the corona treatment is preferably 0.3-1.3 kW; in the embodiments provided in the present application, the discharge power of the corona treatment is preferably 0.8 kW, 1 kW, 1.2 kW, 1 kW, 0.3 kW, 1.3 kW; the time of the corona treatment is preferably 0.5-1.5 s; in the embodiments provided in the present application, the time of the corona treatment is preferably 1 s, 0.8 s, 1.5 s; in the embodiments provided in the present application, the main agent of the two-component polyurethane adhesive is preferably a blocked polyether polyol, and the auxiliary agent is preferably a polyisocyanate; the mass ratio of the main agent to the auxiliary agent is preferably (3-10) : 1; the coating amount of the two-component polyurethane adhesive is preferably 10-20 g / m 2 ; in the embodiments provided in the present application, the coating amount of the two-component polyurethane adhesive is preferably 15 g / m 2 , 18 g / m 2 , 10 g / m 2 , 20 g / m 2 .

[0055] The side of the first load-bearing fabric layer that is attached to the two-component polyurethane adhesive is preferably subjected to corona treatment first and then laminated on the surface of the two-component polyurethane adhesive; the discharge power of the corona treatment is preferably 1-2 kW; in the embodiments provided in the present application, the discharge power of the corona treatment is preferably 1.2 kW, 1.5 kW, 1.8 kW, 1.0 kW, 2.0 kW; the time of the corona treatment is preferably 0.5-1.5 s; in the embodiments provided in the present application, the time of the corona treatment is preferably 1.5 s, 1 s, 0.8 s, 1.3 s, 0.5 s; the temperature of the lamination is preferably 100℃-200℃; in the embodiments provided in the present application, the temperature of the lamination is specifically 140℃, 160℃, 100℃, 200℃; the pressure is preferably 0.5-2 MPa; in the embodiments provided in the present application, the pressure is specifically 1.5 MPa, 0.5 MPa, 2 MPa.

[0056] After lamination, a polyurethane coating layer is coated on the surface of the first load-bearing fabric layer, i.e. the surface not in contact with the two-component polyurethane adhesive; the areal density of the polyurethane coating layer is preferably 20-40 g / m 2 ; in the embodiments provided in the present application, the areal density of the polyurethane coating layer is specifically 25 g / m 2 , 28 g / m 2 , 20 g / m 2 , 40 g / m 2 .

[0057] After coating the polyurethane coating, preferably drying, to obtain the outer capsule; the temperature of the drying is preferably 90-150℃; in the embodiments provided by the present application, the temperature of the drying is specifically 90℃, 140℃, 120℃ or 150℃; the time of the drying is preferably 12-24h.

[0058] In the present application, the surface of the oil-resistant layer is preferably subjected to corona treatment, and then coated with two-component polyurethane adhesive; the discharge power of the corona treatment is preferably 0.5-1.5kW; in the embodiments provided by the present application, the discharge power of the corona treatment is specifically 0.6kW, 0.7kW, 1.5kW, 1.2kW, 0.5kW; the time of the corona treatment is preferably 0.5-1.5s; in the embodiments provided by the present application, the time of the corona treatment is specifically 1.2s, 1.1s, 0.5s, 1.5s; the coating amount of the two-component polyurethane adhesive is preferably 10-20g / m 2 ; in the embodiments provided by the present application, the coating amount of the two-component polyurethane adhesive is specifically 15g / m 2 , 18g / m 2 , 10g / m 2 , 20g / m 2 .

[0059] The side of the second load-bearing fabric layer adhered to the two-component polyurethane adhesive is preferably first subjected to corona treatment and then laminated on the surface of the two-component polyurethane adhesive; the discharge power of the corona treatment is preferably 1-2kW; in the embodiments provided by the present application, the discharge power of the corona treatment is specifically 1.5kW, 1.2kW, 1.4kW, 1.0kW, 2.0kW; the time of the corona treatment is preferably 0.5-1.5s; in the embodiments provided by the present application, the time of the corona treatment is specifically 0.8s, 1s, 1.2s, 1.5s; the temperature of the lamination is preferably 100-150℃; in the embodiments provided by the present application, the temperature of the lamination is specifically 150℃, 130℃, 100℃; the pressure is preferably 0.5-2MPa; in the embodiments provided by the present application, the pressure of the lamination is specifically 1.8MPa, 1.5MPa, 1MPa, 2MPa.

[0060] After lamination, a polyurethane coating is coated on the surface of the second load-bearing fabric layer, i.e. the surface not in contact with the two-component polyurethane adhesive; the areal density of the polyurethane coating is preferably 20-40g / m 2 ; the areal density of the polyurethane coating is specifically 30g / m 2 , 25g / m 2 , 20g / m 2 , 40g / m 2 .

[0061] After coating the polyurethane coating, preferably drying, to obtain the inner capsule; the temperature of the drying is preferably 90-150℃; in the embodiments provided by the present application, the temperature of the drying is specifically 120℃, 150℃; the time of the drying is preferably 12-24h.

[0062] The polyurethane coating of the outer capsule is adhered to the polyurethane coating of the inner capsule for hot pressing; in the present application, the polyurethane coating of the outer capsule and the polyurethane coating of the inner capsule are respectively adhered to the two sides of the isolation support layer for hot pressing to obtain the movable flexible oil capsule; the isolation support layer is a porous thermoplastic elastomer layer; the isolation support layer is as described above, which is not repeated here; the temperature of the hot pressing is preferably 100-180℃, more preferably 120-180℃; in the embodiments provided by the present application, the temperature of the hot pressing is specifically 120℃, 150℃, 160℃, 100℃, 180℃; the pressure of the hot pressing is preferably 0.1-0.5MPa, more preferably 0.2-0.5MPa; in the embodiments provided by the present application, the pressure of the hot pressing is specifically 0.3MPa, 0.5MPa, 0.1MPa; the time of the hot pressing is preferably 10-20s, more preferably 12-20s; in the embodiments provided by the present application, the time of the hot pressing is specifically 12s, 15s, 10s, 20s.

[0063] The flexible oil storage capsule provided by the present application includes an inner layer and an outer layer. The inner layer is continuously immersed in oil, so the inner layer is generally made of oil corrosion resistant material. The outer layer is immersed in seawater, so the outer layer is generally made of seawater corrosion resistant material. The inner and outer layers are bonded by hot pressing of thermoplastic polyurethane elastic porous material. The structure is simple and easy to disassemble. With the underwater oil storage capsule system, a "sea oil station" network can be established in a specific sea area and cruise route, which has important significance in future oil mobilization, island oil logistics support, etc.

[0064] In order to further illustrate the present application, the following embodiments describe in detail a movable flexible oil capsule and a preparation method thereof.

[0065] The reagents used in the following examples are commercially available.

[0066] In the embodiments of the present application, the self-made polyether polyurethane TPU is prepared according to the following method. By changing the molar ratio of chain extender to prepolymer, polymers with different number average molecular weights (Mn) can be obtained:

[0067] The soft segment of the PU resin is polytetrahydrofuran ether dihydric alcohol (PTMG), the hard segment is 4,4-diphenyl methane diisocyanate (MDI) monomer, the chain extender is 1,4-butanediol (BDO), and the PSU resin is prepared by using the prepolymer synthesis and chain extension two-step polymerization reaction, and the specific reaction process is as shown below:

[0068] 1) Put the PTMG and MDI which have been dehydrated in advance into a three-necked flask provided with mechanical stirring, nitrogen protection and constant pressure dropping funnel, control n(OH):n(NCO)=2:1, and react at 80°C for 3h under the protection of N2 atmosphere to obtain polyurethane prepolymer.

[0069] 2) After the prepolymerization is completed, the NCO% titration is carried out by using di-n-butylamine method, then the BDO with a metering ratio is added, and the temperature of the system is gradually increased to 100°C, and the reaction is stopped after 2h to obtain polyether type polyurethane TPU.

[0070] Example 1

[0071] In this example, the outer capsule structure is sequentially from outside to inside as follows: seawater resistant layer→adhesion layer→load bearing fabric layer→heat sealing coating layer, and the thickness of each layer is 0.2mm, 0.04mm, 1.0mm and 0.08mm respectively, and the selection of the materials of each functional layer is as follows:

[0072] (1) The seawater resistant layer is selected from the self-made polyether type polyurethane TPU, the molar ratio of the chain extender to the prepolymer is 1:1.01, and Mn=55000. The prepared polyurethane resin is blown into a TPU film by using a film blowing machine, and the areal density is 25g / m 2 .

[0073] (2) The adhesion layer is selected from the morning sunshine brand hot adhesion type two-component polyurethane adhesive, the main agent is a capped polyether polyol, the auxiliary agent is a polyisocyanate, and the ratio of the main agent to the auxiliary agent is 5:1;

[0074] (3) The load bearing layer is selected from STARAMID F-2 type aramid fiber, and the areal density is 120g / m 2 ;

[0075] (4) The heat sealing coating layer is a self-made polyether type polyurethane TPU coating layer, the molar ratio of the chain extender to the prepolymer is 1:1.04, Mn=45000, and the viscosity is 240mPa·s;

[0076] The outer capsule material is prepared by using the laminated composite method, and the specific steps are as follows:

[0077] (1) The seawater resistant layer film material is placed in the first unwinding position of the laminated composite machine, first passes through the single-sided corona device, the corona discharge power is 0.8kW, and the corona time is 1.0s; then uniformly coats the two-component polyurethane adhesive on the corona surface, and the coating amount is 15g / m2 ;

[0078] (2) The load-bearing fabric layer material is placed in the second unwinding position of the laminating compound machine, and first passes through a single-sided corona device, with a corona discharge power of 1.2 kW and a corona time of 1.5 s;

[0079] (3) The sea water resistant layer film material and the load-bearing fabric layer material are compounded together using a laminating compound device, with a laminating temperature of 140°C and a laminating pressure of 1.5 MPa;

[0080] (4) A polyurethane coating is uniformly coated on the back of the load-bearing fabric layer using a coating device, with a coating area density of 25 g / m 2 ;

[0081] (5) After the coating is completed, the outer capsule material is placed in a 120°C oven for 24 h, and the outer capsule material is obtained.

[0082] In this embodiment, the inner capsule structure is sequentially arranged from the outside to the inside as a heat-sealing coating layer, a load-bearing fabric layer, an adhesive layer, and an oil-resistant layer, with thicknesses of 0.08 mm, 1.2 mm, 0.04 mm, and 0.1 mm, respectively. The materials for the functional layers are selected as follows:

[0083] (1) The heat-sealing coating layer is a self-made polyether type polyurethane TPU coating, with a chain extender to prepolymer molar ratio of 1:1.08, an Mn of 40,000, and a viscosity of 220 mPa·s;

[0084] (2) The load-bearing layer is selected from STARAMID F-2 aramid fibers, with an area density of 130 g / m 2 ;

[0085] (3) The adhesive layer is selected from a hot-adhesive type two-component polyurethane adhesive of the Chenxiang brand, with a main agent to auxiliary agent ratio of 5:1;

[0086] (4) The oil-resistant layer is selected from a PVF film, with a number average molecular weight of 40,000 and an area density of 15 g / m 2 ;

[0087] The inner capsule material is prepared using a laminating compound method, with the specific steps as follows:

[0088] (1) The oil-resistant layer film material is placed in the first unwinding position of the laminating compound machine, and first passes through a single-sided corona device, with a corona discharge power of 0.6 kW and a corona time of 1.2 s; then a two-component polyurethane adhesive is uniformly coated on the corona surface, with a coating amount of 15 g / m 2 ;

[0089] (2) The load-bearing fabric layer material is placed in the second unwinding position of the laminating compound machine, and first passes through a single-sided corona device, with a corona discharge power of 1.5 kW and a corona time of 0.8 s;

[0090] (3) The oil-resistant layer film material and the load-bearing fabric layer material are compounded together by using a laminating composite device, the laminating temperature is 150°C, and the laminating pressure is 1.8 MPa;

[0091] (4) A polyurethane coating layer is uniformly coated on the back of the load-bearing fabric layer by using a coating device, the coating area density is 30 g / m 2 ;

[0092] (5) After the coating is completed, the outer capsule material is placed in a 120°C oven for 24 hours, and the inner capsule material is obtained.

[0093] The support blocks are designed to separate the space between the two layers of the capsule, and the support block material is designed as a thermoplastic polyurethane elastic porous material with a number average molecular weight of 50,000, a thickness of 1 mm, a width of 4 mm, a distance between adjacent support blocks of 1 mm, a hot pressing temperature of 120°C, a hot pressing pressure of 0.3 MPa, and a hot pressing time of 12 s.

[0094] Example 2

[0095] In this embodiment, the outer capsule structure is sequentially from outside to inside: sea water-resistant layer → adhesive layer → load-bearing fabric layer → heat-sealing coating layer, the thickness of each layer is 0.21 mm, 0.05 mm, 1.1 mm, and 0.09 mm, respectively, and the selection of the material of each functional layer is as follows:

[0096] (1) The sea water-resistant layer is selected from a PVF film with a number average molecular weight of 46,000 and an area density of 25 g / m 2 ;

[0097] (2) The adhesive layer is selected from a two-component polyurethane adhesive, which is a hot-adhesive two-component polyurethane adhesive from Chenxiang brand, the main agent is a capped polyether polyol, the auxiliary agent is a polyisocyanate, and the ratio of the main agent to the auxiliary agent is 4:1;

[0098] (3) The load-bearing layer is selected from STARAMID F-2 aramid fiber with an area density of 125 g / m 2 ;

[0099] (4) The heat-sealing coating layer is a self-made polyether type polyurethane TPU coating layer with Mn = 48,000, a molar ratio of chain extender to prepolymer of 1:1.03, and a viscosity of 260 mPa·s;

[0100] The outer capsule material is prepared by using a laminating composite method, and the specific steps are as follows:

[0101] (1) The sea water-resistant layer film material is placed in the first unwinding position of the laminating composite machine, and first passes through a single-sided corona device with a corona discharge power of 1.0 kW and a corona time of 1.0 s; then a two-component polyurethane adhesive is uniformly coated on the corona surface, and the coating amount is 15 g / m2 ;

[0102] (2) The load-bearing fabric layer material is placed in the second unwinding position of the laminating compound machine, and first passes through a single-sided corona device, with a corona discharge power of 1.5 kW and a corona time of 1.0 s;

[0103] (3) The sea water resistant layer film material and the load-bearing fabric layer material are compounded together using a laminating compound device, with a laminating temperature of 160°C and a laminating pressure of 1.5 MPa;

[0104] (4) A polyurethane coating is uniformly coated on the back of the load-bearing fabric layer using a coating device, with a coating area density of 28 g / m 2 ;

[0105] (5) After the coating is completed, the outer capsule material is placed in a 120°C oven for 24 h, and the outer capsule material is obtained.

[0106] In this embodiment, the inner capsule structure is sequentially from the outside to the inside: heat-sealing coating layer → load-bearing fabric layer → adhesive layer → oil-resistant layer, with thicknesses of 0.085 mm, 1.2 mm, 0.045 mm, and 0.15 mm, respectively, and the selection of the materials for each functional layer is as follows:

[0107] (1) The heat-sealing coating layer is a self-made polyether type polyurethane TPU coating, with Mn = 45000, a molar ratio of chain extender to prepolymer of 1:1.04, and a viscosity of 240 mPa·s;

[0108] (2) The load-bearing layer is selected from STARAMID F-2 aramid fibers, with an area density of 135 g / m 2 ;

[0109] (3) The adhesive layer is selected from a hot-adhesive type two-component polyurethane adhesive of the Chenxiang brand, with a ratio of main agent to auxiliary agent of 6:1;

[0110] (4) The oil-resistant layer is selected from a PVF film, with a number average molecular weight of 45000 and an area density of 15 g / m 2 ;

[0111] The inner capsule material is prepared using a laminating compound method, and the specific steps are as follows:

[0112] (1) The oil-resistant layer film material is placed in the first unwinding position of the laminating compound machine, and first passes through a single-sided corona device, with a corona discharge power of 0.7 kW and a corona time of 1.1 s; then a two-component polyurethane adhesive is uniformly coated on the corona surface, with a coating amount of 18 g / m 2 ;

[0113] (2) The load-bearing fabric layer material is placed in the second unwinding position of the laminating compound machine, and first passes through a single-sided corona device, with a corona discharge power of 1.5 kW and a corona time of 1.0 s;

[0114] (3) The oil-resistant layer film material and the load-bearing fabric layer material are compounded together by using a laminating composite device, the laminating temperature is 130°C, and the laminating pressure is 1.5 MPa;

[0115] (4) A polyurethane coating layer is uniformly coated on the back of the load-bearing fabric layer by using a coating device, the coating area density is 25 g / m 2 ;

[0116] (5) After the coating is completed, the outer capsule material is placed in a 120°C oven for 24 hours, and the inner capsule material is obtained.

[0117] The support blocks are designed to separate the space between the two layers of the capsule, and the support block material is designed as a thermoplastic polyurethane elastic porous material with a number average molecular weight of 55,000, a thickness of 2.5 mm, a width of 4 mm, a distance between adjacent support blocks of 1 mm, a hot pressing temperature of 150°C, a hot pressing pressure of 0.5 MPa, and a hot pressing time of 15 s.

[0118] Example 3

[0119] In this embodiment, the outer capsule structure is sequentially from outside to inside: a seawater-resistant layer → an adhesive layer → a load-bearing fabric layer → a heat-sealing coating layer, and the thicknesses of the layers are 0.22 mm, 0.04 mm, 1.3 mm, and 0.10 mm, respectively. The selection of the materials of the functional layers is as follows:

[0120] (1) The seawater-resistant layer is selected to be a PVDF film with a number average molecular weight of 50,000 and an area density of 25 g / m 2 ;

[0121] (2) The adhesive layer is selected to be a hot-adhesive type two-component polyurethane adhesive of the Chenxiang brand, the main agent is a blocked polyether polyol, the auxiliary agent is a polyisocyanate, and the ratio of the main agent to the auxiliary agent is 3:1;

[0122] (3) The load-bearing layer is selected to be STARAMID F-2 type aramid fiber with an area density of 135 g / m 2 ;

[0123] (4) The heat-sealing coating layer is a self-made polyether type polyurethane TPU coating layer with Mn = 45,000, a molar ratio of the chain extender to the prepolymer of 1:1.04, and a viscosity of 240 mPa·s;

[0124] The outer capsule material is prepared by using a laminating composite method, and the specific steps are as follows:

[0125] (1) The seawater-resistant layer film material is placed in the first unwinding position of the laminating composite machine, first passes through a single-sided corona device with a corona discharge power of 1.2 kW and a corona time of 0.8 s; then a two-component polyurethane adhesive is uniformly coated on the corona surface, and the coating amount is 18 g / m2 ;

[0126] (2) The load-bearing fabric layer material is placed in the second unwinding position of the laminating compound machine, and first passes through a single-sided corona device, with a corona discharge power of 1.8 kW and a corona time of 0.8 s;

[0127] (3) The sea water resistant layer film material and the load-bearing fabric layer material are compounded together using a laminating compound device, with a laminating temperature of 140°C and a laminating pressure of 1.5 MPa;

[0128] (4) A polyurethane coating is uniformly coated on the back of the load-bearing fabric layer using a coating device, with a coating area density of 28 g / m 2 ;

[0129] (5) After the coating is completed, the outer capsule material is placed in a 120°C oven for 24 h, and the outer capsule material is obtained.

[0130] In this embodiment, the inner capsule structure is sequentially arranged from the outside to the inside as a heat-sealing coating layer → a load-bearing fabric layer → an adhesive layer → an oil-resistant layer, with thicknesses of 0.10 mm, 1.4 mm, 0.045 mm, and 0.18 mm, respectively, and the selection of the materials of the functional layers is as follows:

[0131] (1) The heat-sealing coating layer is a self-made polyether type polyurethane TPU coating layer, with Mn = 51000, a molar ratio of chain extender to prepolymer of 1:1.01, and a viscosity of 300 mPa·s;

[0132] (2) The load-bearing layer is selected from STARAMID F-2 aramid fibers, with an area density of 150 g / m 2 ;

[0133] (3) The adhesive layer is selected from a hot-adhesive type two-component polyurethane adhesive of the Chenxiang brand, with a ratio of main agent to auxiliary agent of 8:1;

[0134] (4) The oil-resistant layer is selected from a PVDF film, with a number average molecular weight of 45000 and an area density of 18 g / m 2 ;

[0135] The inner capsule material is prepared by a laminating compound method, and the specific steps are as follows:

[0136] (1) The oil-resistant layer film material is placed in the first unwinding position of the laminating compound machine, and first passes through a single-sided corona device, with a corona discharge power of 1.5 kW and a corona time of 0.5 s; then a two-component polyurethane adhesive is uniformly coated on the corona surface, with a coating amount of 15 g / m 2 ;

[0137] (2) The load-bearing fabric layer material is placed in the second unwinding position of the laminating compound machine, and first passes through a single-sided corona device, with a corona discharge power of 1.2 kW and a corona time of 1.2 s;

[0138] (3) The oil-resistant layer film material and the load-bearing fabric layer material are compounded together by using a laminating composite device, the laminating temperature is 150°C, and the laminating pressure is 1.0 MPa;

[0139] (4) A polyurethane coating layer is uniformly coated on the back of the load-bearing fabric layer by using a coating device, the coating area density is 30 g / m 2 ;

[0140] (5) After the coating is completed, the outer capsule material is placed in a 120°C oven for 20h, and the inner capsule material is obtained.

[0141] The support blocks are designed to separate the space between the two layers of the capsule, and the support block material is designed as a thermoplastic polyurethane elastic porous material with a number average molecular weight of 48000, a thickness of 3mm, a width of 4mm, a distance between adjacent support blocks of 1mm, a hot pressing temperature of 150°C, a hot pressing pressure of 0.5MPa, and a hot pressing time of 15s.

[0142] Example 4

[0143] In this embodiment, the outer capsule structure is sequentially from outside to inside as follows: sea water-resistant layer → adhesive layer → load-bearing fabric layer → heat-sealing coating layer, and the thickness of each layer is 0.24mm, 0.04mm, 1.5mm, and 0.09mm, respectively. The selection of the material of each functional layer is as follows:

[0144] (1) The sea water-resistant layer is selected as a PVDF film with a number average molecular weight of 45000 and an area density of 30 g / m 2 ;

[0145] (2) The adhesive layer is selected as a hot-adhesive type two-component polyurethane adhesive of Chenxiang brand, the main agent is a blocked polyether polyol, the auxiliary agent is a polyisocyanate, and the ratio of the main agent to the auxiliary agent is 10:1;

[0146] (3) The load-bearing layer is selected as STARAMID F-2 type aramid fiber with an area density of 120 g / m 2 ;

[0147] (4) The heat-sealing coating layer is a self-made thermoplastic polyurethane TPU coating layer with Mn = 45000, the molar ratio of the chain extender to the prepolymer is 1:1.04, and the viscosity is 240 mPa·s;

[0148] The outer capsule material is prepared by using a laminating composite method, and the specific steps are as follows:

[0149] (1) The sea water-resistant layer film material is placed in the first unwinding position of the laminating composite machine, and first passes through a single-sided corona device with a corona discharge power of 1.0 kW and a corona time of 1.5s; then a two-component polyurethane adhesive is uniformly coated on the corona surface, and the coating amount is 15 g / m2 ;

[0150] (2)The load-bearing fabric layer material is placed in the second unwinding position of the laminating compound machine, and first passes through a single-sided corona device, with a corona discharge power of 1.5 kW and a corona time of 1.3 s;

[0151] (3) The sea water resistant layer film material and the load-bearing fabric layer material are compounded together using a laminating compound device, with a laminating temperature of 140°C and a laminating pressure of 1.5 MPa;

[0152] (4) A polyurethane coating layer is uniformly coated on the back of the load-bearing fabric layer using a coating device, with a coating area density of 20 g / m 2 ;

[0153] (5) After the coating is completed, the outer capsule material is placed in a 140°C oven for 12 h, and the outer capsule material is obtained.

[0154] In this embodiment, the inner capsule structure is sequentially from the outside to the inside: heat sealing coating layer → load-bearing fabric layer → adhesive layer → oil resistant layer, and the thickness of each layer is 0.085 mm, 1.5 mm, 0.045 mm, and 0.2 mm, respectively. The selection of the materials of each functional layer is as follows:

[0155] (1) The heat sealing coating layer is a self-made polyether type polyurethane TPU coating layer with Mn = 50000, a molar ratio of chain extender to prepolymer of 1:1.02, and a viscosity of 280 mPa·s; the heat sealing coating layer is selected to be polyurethane with a viscosity of 280 mPa·s;

[0156] (2) The load-bearing layer is selected to be STARAMID F-2 type aramid fiber with an area density of 130 g / m 2 ;

[0157] (3) The adhesive layer is selected to be a hot-adhesive type two-component polyurethane adhesive of the Chenxiang brand, with a ratio of main agent to auxiliary agent of 5:1;

[0158] (4) The oil resistant layer is selected to be a PVDF film with a data molecular weight of 50000 and an area density of 18 g / m 2 ;

[0159] The inner capsule material is prepared by a laminating compound method, and the specific steps are as follows:

[0160] (1) The oil resistant layer film material is placed in the first unwinding position of the laminating compound machine, and first passes through a single-sided corona device, with a corona discharge power of 1.2 kW and a corona time of 1.2 s; then a two-component polyurethane adhesive is uniformly coated on the corona surface, with a coating amount of 15 g / m 2 ;

[0161] (2) The load-bearing fabric layer material is placed in the second unwinding position of the laminating compound machine, and first passes through the single-sided corona device, with a corona discharge power of 1.4 kW and a corona time of 1.2 s;

[0162] (3) The oil-resistant layer film material and the load-bearing fabric layer material are compounded together using the laminating compound device, with a laminating temperature of 150°C and a laminating pressure of 1.0 MPa;

[0163] (4) A layer of polyurethane coating is uniformly coated on the back of the load-bearing fabric layer using a coating device, with a coating area density of 25 g / m 2 ;

[0164] (5) After the coating is completed, the outer capsule material is placed in a 150°C oven for 10 h, and the inner capsule material is obtained.

[0165] A support block is designed between the oil capsule and the inner and outer capsules to separate the space between the two capsule bodies. The support block material is designed as a thermoplastic polyurethane elastic porous material with a number average molecular weight of 60,000, a thickness of 1.5 mm, a width of 4 mm, a distance between adjacent support blocks of 1 mm, a hot pressing temperature of 160°C, a hot pressing pressure of 0.5 MPa, and a hot pressing time of 12 s.

[0166] Example 5

[0167] In this embodiment, the outer capsule structure is sequentially from the outside to the inside: a seawater-resistant layer → an adhesive layer → a load-bearing fabric layer → a heat-sealing coating layer, with thicknesses of 0.2 mm, 0.05 mm, 1.5 mm, and 0.10 mm, respectively. The selection of the materials for each functional layer is as follows:

[0168] (1) The seawater-resistant layer is selected to be a PVF film with a number average molecular weight of 45,000 and an area density of 20 g / m 2 ;

[0169] (2) The adhesive layer is selected to be a Zhenxiang brand hot-adhesive type two-component polyurethane adhesive, with a capped polyether polyol as the main agent and a polyisocyanate as the auxiliary agent, with a ratio of 1:1;

[0170] (3) The load-bearing layer is selected to be a STARAMID F-2 type aramid fiber with an area density of 100 g / m 2 ;

[0171] (4) The heat-sealing coating layer is a self-made polyether type polyurethane TPU coating with Mn = 35,000, a molar ratio of chain extender to prepolymer of 1:1.12, and a viscosity of 200 mPa·s;

[0172] The outer capsule material is prepared using a laminating compound method, and the specific steps are as follows:

[0173] (1) The sea water resistant layer film material is placed in the first unwinding position of the laminating compound machine, firstly passes through the single-sided corona device, the corona discharge power is 0.3 kW, and the corona time is 1.5 s; then a double-component polyurethane adhesive is uniformly coated on the corona surface, and the coating amount is 10 g / m 2 ;

[0174] (2) The load-bearing fabric layer material is placed in the second unwinding position of the laminating compound machine, firstly passes through the single-sided corona device, the corona discharge power is 1.0 kW, and the corona time is 0.5 s;

[0175] (3) The sea water resistant layer film material and the load-bearing fabric layer material are compounded together by using the laminating compound device, the laminating temperature is 100°C, and the laminating pressure is 0.5 MPa;

[0176] (4) A polyurethane coating layer is uniformly coated on the back of the load-bearing fabric layer by using a coating device, and the coating surface density is 20 g / m 2 ;

[0177] (5) After the coating is completed, the outer capsule material is placed in a 90°C oven for 24 h, and the outer capsule material is obtained.

[0178] In the embodiment, the inner capsule structure is sequentially arranged from outside to inside as a heat-sealing coating layer, a load-bearing fabric layer, an adhesive layer and an oil-resistant layer, and the thicknesses of the layers are 0.08 mm, 1.5 mm, 0.045 mm and 0.25 mm, respectively. The selection of the materials of the functional layers is as follows:

[0179] (1) The heat-sealing coating layer is a self-made polyether type polyurethane TPU coating layer, Mn is 35000, the molar ratio of the chain extender to the prepolymer is 1:1.12, and the viscosity is 200 mPa·s;

[0180] (2) The load-bearing layer selects STARAMID F-2 type aramid fiber, and the surface density is 100 g / m 2 ;

[0181] (3) The adhesive layer selects a hot-adhesive type double-component polyurethane adhesive of Chenxiang brand, and the ratio of the main agent to the auxiliary agent is 1:1;

[0182] (4) The oil-resistant layer selects a PVF film, the number average molecular weight is 50000, and the surface density is 10 g / m 2 ;

[0183] The inner capsule material is prepared by using a laminating compound method, and the specific steps are as follows:

[0184] (1) The oil-resistant layer film material is placed in the first unwinding position of the laminating compound machine, firstly passes through the single-sided corona device, the corona discharge power is 0.5 kW, and the corona time is 1.5 s; then a double-component polyurethane adhesive is uniformly coated on the corona surface, and the coating amount is 10 g / m 2 ;

[0185] (2) The load-bearing fabric layer material is placed in the second unwinding position of the laminating compound machine, and first passes through a single-sided corona device, with a corona discharge power of 1.0 kW and a corona time of 1.5 s;

[0186] (3) The oil-resistant layer film material and the load-bearing fabric layer material are compounded together using a laminating compound device, with a laminating temperature of 100°C and a laminating pressure of 2.0 MPa;

[0187] (4) A layer of polyurethane coating is uniformly coated on the back of the load-bearing fabric layer using a coating device, with a coating area density of 20 g / m 2 ;

[0188] (5) After the coating is completed, the outer capsule material is placed in a 90°C oven for 24 h, and the inner capsule material is obtained.

[0189] A support block is designed to separate the space between the oil capsule and the inner and outer capsules. The support block material is designed as a thermoplastic polyurethane elastic porous material with a number average molecular weight of 50,000, a thickness of 2.5 mm, a width of 4 mm, a distance between adjacent support blocks of 1 mm, a hot pressing temperature of 100°C, a hot pressing pressure of 0.1 MPa, and a hot pressing time of 10 s.

[0190] Example 6

[0191] In this embodiment, the outer capsule structure is composed of, from the outside to the inside, a seawater-resistant layer, an adhesive layer, a load-bearing fabric layer, and a heat-sealing coating layer, with thicknesses of 0.22 mm, 0.05 mm, 1.5 mm, and 0.09 mm, respectively. The materials for each functional layer are selected as follows:

[0192] (1) The seawater-resistant layer is selected as a PVF film with a number average molecular weight of 45,000 and an area density of 30 g / m 2 ;

[0193] (2) The adhesive layer is selected as a hot-adhesive type two-component polyurethane adhesive of the Chenxiang brand, with a capped polyether polyol as the main agent and a polyisocyanate as the auxiliary agent, with a ratio of 10:1 between the main agent and the auxiliary agent;

[0194] (3) The load-bearing layer is selected as STARAMID F-2 aramid fiber with an area density of 150 g / m 2 ;

[0195] (4) The heat-sealing coating layer is a self-made polyether type polyurethane TPU coating with Mn = 51,000, a molar ratio of chain extender to prepolymer of 1:1.01, and a viscosity of 300 mPa·s;

[0196] The outer capsule material is prepared using a laminating compound method, with the following specific steps:

[0197] (1) The sea water resistant layer film material is placed in the first unwinding position of the laminating compound machine, firstly passed through the single-sided corona device, the corona discharge power is 1.3 kW, and the corona time is 1.5 s; then a double-component polyurethane adhesive is uniformly coated on the corona surface, and the adhesive amount is 20 g / m 2 ;

[0198] (2) The load-bearing fabric layer material is placed in the second unwinding position of the laminating compound machine, firstly passed through the single-sided corona device, the corona discharge power is 2.0 kW, and the corona time is 1.5 s;

[0199] (3) The sea water resistant layer film material and the load-bearing fabric layer material are compounded together by using the laminating compound device, the laminating temperature is 200 ℃, and the laminating pressure is 2.0 MPa;

[0200] (4) A polyurethane coating is uniformly coated on the back of the load-bearing fabric layer by using a coating device, and the coating surface density is 40 g / m 2 ;

[0201] (5) After the coating is completed, the outer capsule material is placed in a 150 ℃ oven for 12 h, and the outer capsule material is obtained.

[0202] In the embodiment, the inner capsule structure is in turn, from outside to inside, heat-sealing coating layer → load-bearing fabric layer → adhesive layer → oil-resistant layer, and the thicknesses of the layers are in turn 0.085 mm, 1.3 mm, 0.045 mm and 0.20 mm. The selection of the materials of the functional layers is as follows:

[0203] (1) The heat-sealing coating layer is a self-made polyether type polyurethane TPU coating layer, Mn = 51000, the molar ratio of the chain extender to the prepolymer is 1:1.01, and the viscosity is 300 mPa·s;

[0204] (2) The load-bearing layer selects STARAMID F-2 type aramid fiber, and the surface density is 150 g / m 2 ;

[0205] (3) The adhesive layer selects the hot-adhesive type double-component polyurethane adhesive of Chenxiang brand, and the ratio of the main agent to the auxiliary agent is 10:1;

[0206] (4) The oil-resistant layer selects PVF film, the number average molecular weight is 50000, and the surface density is 30 g / m 2 ;

[0207] The inner capsule material is prepared by using the laminating compound method, and the specific steps are as follows:

[0208] (1) The oil-resistant layer film material is placed in the first unwinding position of the laminating compound machine, firstly passed through the single-sided corona device, the corona discharge power is 1.5 kW, and the corona time is 1.5 s; then a double-component polyurethane adhesive is uniformly coated on the corona surface, and the adhesive amount is 20 g / m 2 ;

[0209] (2) The load-bearing fabric layer material is placed in the second unwinding position of the laminating compound machine, and first passes through the single-sided corona device, with a corona discharge power of 2.0 kW and a corona time of 1.5 s;

[0210] (3) The oil-resistant layer film material and the load-bearing fabric layer material are compounded together by using the laminating compound device, with a laminating temperature of 150℃ and a laminating pressure of 2.0 MPa;

[0211] (4) A polyurethane coating is uniformly coated on the back of the load-bearing fabric layer by using a coating device, with a coating area density of 40 g / m 2 ;

[0212] (5) After the coating is completed, the outer capsule material is placed in a 150℃ oven for 12 h, and the inner capsule material is obtained.

[0213] The support blocks are designed to separate the space between the two layers of the capsule, and the support block material is designed as a thermoplastic polyurethane elastic porous material with a number average molecular weight of 55,000, a thickness of 2 mm, a width of 4 mm, a distance between adjacent support blocks of 1 mm, a hot pressing temperature of 180℃, a hot pressing pressure of 0.5 MPa, and a hot pressing time of 20 s.

[0214] In order to verify the technical effects obtained by the present application, the surface density, oil and gas permeation amount, interlayer peeling strength, bursting strength, tensile strength, aging resistance and other performance tests of the movable flexible oil capsule body materials prepared in Examples 1-6 were carried out, and the results are shown in Table 1.

[0215] Table 1 Test results of the movable flexible oil capsule body materials obtained in Examples 1-6

[0216]

Claims

1. A movable flexible oil bladder, characterized in that, Including the cyst body; The capsule comprises an outer capsule and an inner capsule arranged sequentially. The outer bladder comprises, from the outside to the inside, a seawater-resistant layer, a first adhesive layer, a first load-bearing fabric layer, and a first heat-sealing coating layer arranged sequentially. The inner bladder comprises, from the outside to the inside, a second heat-sealing coating, a second load-bearing fabric layer, a second adhesive layer, and an oil-resistant layer arranged sequentially. An isolation support layer is also provided between the outer capsule and the inner capsule; the isolation support layer is a thermoplastic polyurethane elastic porous material layer; the thickness of the isolation support layer is 0.5-3.0 mm; The seawater-resistant layer is a polyether-type polyurethane layer; the areal density of the seawater-resistant layer is 20-30 g / m³. 2 ; The oil-resistant layer is a polyvinylidene fluoride (PVC) layer and / or a polyvinylidene fluoride (PVDF) layer; the areal density of the oil-resistant layer is 10–25 g / m³. 2 ; The first adhesive layer and the second adhesive layer are each independently a two-component polyurethane adhesive layer; the two-component polyurethane adhesive layer is formed by a two-component polyurethane adhesive; the two-component polyurethane adhesive includes a main agent and a curing agent; the mass ratio of the main agent to the curing agent is (1~10):1; The first load-bearing fabric layer and the second load-bearing fabric layer are aramid fiber fabric layers; The areal density of the aramid fiber fabric layer is 100-150 g / m³. 2 ; The tensile strength of the aramid fiber used in the aramid fiber fabric layer is greater than or equal to 1000 N / cm; The first heat-sealing coating and the second heat-sealing coating are each independently selected from polyurethane coatings; the viscosity of the polyurethane coating is 200-300 mPa·s; The polyether polyurethane in the polyether polyurethane layer is prepared by the following method: 1) PTMG and MDI, which have been dehydrated beforehand, are placed in a three-necked flask equipped with mechanical stirring, nitrogen protection, and a constant pressure dropping funnel. The ratio of n(OH):n(NCO) is controlled to be 2:

1. The reaction is carried out at 80°C for 3 hours under N2 atmosphere protection to obtain polyurethane prepolymer; 2) After the prepolymerization is completed, NCO% is titrated using the di-n-butylamine method. Then, a stoichiometric amount of BDO is added, and the system temperature is gradually increased to 100°C. The reaction is stopped after 2 hours to obtain polyether polyurethane. The thickness of the seawater resistant layer is 0.2–0.3 mm; The thickness of the first adhesive layer and the second adhesive layer are each independently 0.04 to 0.06 mm; The thickness of the first load-bearing fabric layer and the second load-bearing fabric layer are each independently 1.0 to 1.5 mm; The thickness of the first heat-sealing coating and the second heat-sealing coating are each independently 0.08–0.10 mm; The thickness of the oil-resistant layer is 0.1 to 0.25 mm.

2. The movable flexible oil bladder according to claim 1, characterized in that, The areal density of the capsule is 300–480 g / m³ 2 ; The oil and gas permeation rate of the capsule is less than or equal to 10 g / m³. 2 ·24h; The peel strength between the inner and outer capsules of the capsule is greater than or equal to 2.0 kN / m; The bursting strength of the capsule is greater than or equal to 6000N; The tensile strength of the capsule at room temperature is greater than or equal to 1000 N / cm; The tensile strength of the capsule at both -30℃ and 80℃ is greater than or equal to 900 N / cm; The tensile strength of the capsule after 200 hours of salt spray corrosion is greater than or equal to 800 N / cm.

3. A method for preparing the movable flexible oil bladder according to claim 1, characterized in that, Includes the following steps: S1) A two-component polyurethane adhesive is coated on the surface of the seawater resistant layer, and then the first load-bearing fabric layer is laminated together. A polyurethane coating is then applied to the surface of the first load-bearing fabric layer to obtain the outer bladder. A two-component polyurethane adhesive is coated on the surface of the oil-resistant layer, and then the second load-bearing fabric layer is laminated together. Finally, a polyurethane coating is applied to the surface of the second load-bearing fabric layer to obtain the inner bladder. S2) The polyurethane coating of the outer bladder and the polyurethane coating of the inner bladder are bonded together by hot pressing to obtain a movable flexible oil bladder. Step S2) specifically involves: hot-pressing the polyurethane coating of the outer bladder and the polyurethane coating of the inner bladder to both sides of the isolation support layer to obtain a movable flexible oil bladder; the isolation support layer is a porous thermoplastic elastic polymer material layer. The lamination temperature during outer capsule preparation is 100℃~200℃; the pressure is 0.5~2MPa. The lamination temperature during inner capsule preparation is 100℃~150℃; the pressure is 0.5~2MPa. The hot pressing temperature is 100℃~180℃; the hot pressing pressure is 0.1~0.5MPa; and the hot pressing time is 10~20s.

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