KR100993635B1 - Fishing net manufacturing method of using biodegradable resin composition - Google Patents

Abstract

The present invention is to provide a method for manufacturing a fishing net using a biodegradable resin composition that is decomposed by microorganisms for the purpose of eco-friendly fishing, more specifically, polybutylene succinate (PBS: poly butylene) Polybutylene adipate-co-terephthalate (PBAT) resin, which has lower structural strength but higher flexibility than succinate resin and PBS resin, was polymerized in a ratio and then spun as a single fiber. By manufacturing the net yarn and by using the net yarn to manufacture the fishing net, while applying a material that can be decomposed naturally in the seawater, while securing a catch level of the performance equivalent to the existing non-degradable nylon fishing nets In order to minimize the damage of coastal waters and ghost fishing by waste fishing gear, The present invention relates to a method for manufacturing a fishing net using a biodegradable resin composition which simultaneously satisfies the strength, flexibility, and elongation recovery required for the fishing net.

Description

Fishing net manufacturing method of using biodegradable resin composition

The present invention is a polybutylene succinate (PBS: excellent strength but low elongation) to maintain the fishing performance comparable to the existing hardly decomposable nylon fishing net even if the fishing net is made of biodegradable resin that is decomposed by microorganisms (PBS: Manufacture of a fishing net using a poly butylene succinate resin and a mixed resin of polybutylene adipate-co-terephthalate (PBAT) resin having lower structural strength but excellent elongation compared to the PBS resin By applying materials that can decompose naturally in the seawater to fishing nets, it is possible to minimize the pollution of coastal waters and damage of ghost fishing by waste fishing, while the strength, flexibility and elongation required for fishing nets. The present invention relates to a manufacturing method of a fishing net using a biodegradable resin composition to ensure a recovery degree at the same time.

In general, fish are caught using fishing nets and fishing, and fishing nets include fishing nets, traps, trolls, low nets, eye nets, and wire nets. It is produced as a fishing gear.

Among the various fishing gears described above, the magnetic net fishing gear is attached to the upper part of the fishing net, and the lower part of the fishing net is attached with a needle made of lead to place the fishing gear on the upper or the middle of the water surface or the bottom of the seabed. The fishing nets must be flowered or entangled and caught, so the flexibility of fishing nets should be good.

In addition, in the case of catch fishing gear, a cylindrical or conical frame is made of wire, and the fishing net is surrounded by a fishing net and laid on the bottom of the seabed and then lifted up to the ship. As a result, wing nets and sacks nets are used to tow fishing gear into vessels so that the target organisms enter the sacks nets. The fishing nets used for such fishing gears must have good impact resistance.

As shown in Figure 2, the net fishing gear is a fishing net (3) having a square or diamond-shaped mesh () 目) is the main body of the net 8, the upper end side for developing the fishing net (3) to the top Moxibustion 5 is connected, and a needle 6 is connected to the lower end side of the fishing net 3 to hang down.

When the fishing net (8) is put into the sea, the fishing net (3) is expanded up and down by buoyancy of the moxibustion (5) and the sedimentation force of the acupuncture (6), it is possible to capture the target organism, The depth at which 8) is placed is adjusted to the length of the buoy (2) connecting the buoy (1) which floats on the sea surface to the magnetic net (8) to indicate the laying position of the fishing gear.

In addition, the trapped fishing gear is made of a cylindrical or conical frame (7) using a wire or the like, as shown in Figs. 5 and 6, to cover the fishing net (3) thereon to produce the trap 9 The conventional fishing net 3 used for fishing gear, such as the magnetic net 8 and the trap 9, consists mostly of the hard-decomposable aromatic polymer synthetic resin material.

Since the fishing net 8 and the trap 9 are put into the sea for about 1 to 15 days and then lifted up, the buoy wire 2 is cut by a fishing boat operating with rough sea fishing or fishing. As a result, a situation in which the fishing net 3 applied to the magnetic net 8 or the trap 9 is lost along with the phrase is frequently generated.

When the above situation occurs, the existing fishing net (3) is made of a non-degradable aromatic polymer synthetic resin that does not biodegrade, so that the fishery entangled or captured fishery fish in the lost fishing is repeatedly repeated In addition to the large loss of resources, there was a problem that fishing gear on the bottom of the sea contaminated the spawning ground and the habitat of the aquatic life.

In order to prevent the above problems, recently, to produce various fishing nets (3) using a biodegradable resin that can be biologically decomposed in seawater, as a representative example of the Republic of Korea registered patent application The biodegradable aliphatic polyester resin composition of Claim 10-415812, the phrase using the same, and its manufacturing method are mentioned.

However, when manufacturing the fishing net (3) using aliphatic polyester resin as the conventional biodegradable resin as described above, by applying a material capable of naturally degrading in seawater to the fishing net (3), discarded in the sea Although it was possible to minimize the pollution of the coastal waters and the damage of ghost fishing by the coastal waters, the flexibility and elasticity recovery required for the fishing nets 3 were inferior. Therefore, the fishing performance was lowered compared to the conventional nylon fishing nets. The problem that the fishing net 3 is easily broken occurs.

In other words, the fishing net (8) makes the fish easily plugged into the mesh of the fishing net (3), and when the fish are removed, the fishing net (3) must return to its original state. Therefore, the fish should easily enter into the trap 9, in the case of the fishing net (3) made of a biodegradable aliphatic polyester-based resin composition having a low flexibility and elastic recovery degree is that the fishing performance is lowered and the practical value is lowered.

In addition, when the net yarn for the fishing net (3) using an aliphatic polyester resin is spun at a draw ratio of 5.0 to 6.0, the spinning net yarn is broken and then the fishing net (3) is manufactured by conventional hot air method, Since the strength, flexibility and elasticity required for the fishing net 3 are simultaneously lowered, not only the fishing performance is lowered but also the fishing net 3 is easily broken, thereby causing a problem that the practical value as a fishing gear is greatly reduced.

As described above, due to the lack of strength, flexibility, and elasticity that the fishing net 3 should have, the economical efficiency of the fishing using the fishing net 3 is deteriorated, and it is also an adverse effect on the improvement of the management balance due to fishing. In addition, due to these problems, further research and experiment on the material of the fishing net (3) as well as the manufacturing process of the fishing net (3) is in progress.

The present invention has been made to solve the above conventional problems, to prepare a fishing net polymerized in a certain ratio of polybutylene succinate and polybutylene adipate terephthalate resin, which is an aliphatic polyester-based natural decomposition in seawater. In order to minimize the pollution of the coastal waters and the damage of ghost fishing by waste fishing, it is possible to secure enough strength, flexibility and elasticity recovery for fishing nets. The technical task is to improve the convenience and economics of fishing using fishing nets, and to contribute greatly to the improvement of management balance due to fishing.

Biodegradable resin composition for fishing nets used in the present invention as a means for solving the above technical problem, polybutylene succinate (PBS: 85 to 95 wt%) as an aliphatic polyester resin, poly Butylene adipate terephthalate (PBAT: poly butylene adipate-co-terephthalate) characterized in that the mixed resin of 5 to 15 wt% resin, the mixed resin of the PBS resin and PBAT resin to 100wt%, oxidation An additive comprising an inhibitor, a UV stabilizer, and a dispersant is additionally mixed in an amount of 1 to 5 wt%.

In addition, the method for producing a fishing net using the biodegradable resin composition according to the present invention includes 85 to 95 wt% of a polybutylene succinate (PBS) resin as the aliphatic polyester resin, and a polybutylene adidiate. A resin mixing step of mixing 5 to 15 wt% of a polybutylene adipate-co-terephthalate (PBAT) resin in a mixer; Compounding step of producing a resin compound by heating the resin mixed through the resin mixing step to a temperature of 130 ~ 150 ℃; A pellet molding step of extruding the resin compound prepared through the compounding step into pellets; A dehumidifying drying step of removing moisture from the resin pellets prepared through the pellet molding step under a temperature condition of 70 to 90 ° C .; A spinning step of spinning the resin pellets subjected to the dehumidifying and drying step into a spinning machine to radiate fishing net meshes with an elongation ratio of 6.0 to 7.0; Using the net yarn manufactured through the spinning step is characterized in that the fishing net, then heat-treating it in a wet method.

According to the present invention as described above, by applying a material capable of natural decomposition in seawater fishing nets to minimize the damage of coastal waters and ghost fishing by waste fishing, while PBS and PBAT resin By using different physical properties, the branch has the effect of providing sufficient flexibility and elasticity of the fishing net while ensuring sufficient structural strength for the fishing net.

As a result, it is possible to prevent the reduction of catches and the breakage of fishing nets even in catch fishing nets that catch fish in the mesh and catch trapping fish to enter the fishing nets along with manned traps. Not only can provide a very good fishing net with a practical value, but also has a very useful effect, such as improving the convenience and economics of fishing to contribute to improving the management balance of fishing.

1 is a process block diagram showing a manufacturing method of a fishing net according to the present invention,
2 is an operation diagram of the fishing net;
3 is an enlarged front view of the magnetic net portion,
4 is a front view showing an extract of the fishing net in Figure 3,
5 is an operation of fishing fish
6 is an enlarged perspective view of the trap part.

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

First, the biodegradable resin composition for fishing nets used in the present invention is 85 to 95 wt% of a polybutylene succinate (PBS) resin as an aliphatic polyester resin, and a polybutylene adipate terephthalate (PBAT). : Poly butylene adipate-co-terephthalate) The resin is based on a mixed resin of 5 to 15 wt%, and each of the above resins is a product produced under the trade name EnPol.

In general, aliphatic polyester is polymerized by polycondensation of aliphatic dicarboxylic acids and aliphatic glycols, and thus, products having various physical properties and melting points can be obtained as the type and content of raw materials are changed. As the aliphatic polyester resin used in the present invention, the molecular structures and characteristics of the PBS resin and the PBAT resin, which are homopolyesters, are shown in the following table.

Basic Structure of Aliphatic Polyester EnPol

The PBS resin used in the present invention is based on esterification reaction using butanediol (1,4-butanediol) as aliphatic glycols and succinic acid as aliphatic dicarboxylic acids as raw materials. It becomes a polymer obtained through a polycondensation reaction, and it is excellent in structural strength, but it has the characteristic that it has high crystallinity and low elongation rate.

Meanwhile, the PBAT resin used in the present invention is butanediol (1,4-butanediol) as aliphatic glycols, adipic acid as an aliphatic component as dicarboxylic acids, and aromatic It becomes an aliphatic / aromatic copolyester (DM) using dimethyl terephthalate (DMT) as a raw material.

The PBAT resin has the properties of an elastomer (elastomer) due to the presence of a large amount of amorphous regions in the crystal structure due to cocrystallization according to the combination of multicomponents, resulting in an elongation rate. In addition to excellent characteristics, it exhibits a lower strength and a lower solidification rate than the homopolymer PBS resin.

By using the different physical properties of the PBS resin and PBAT resin as described above, to ensure the structural strength required for the fishing net, while providing flexibility and elastic recovery and impact resistance based on the same For this purpose, the mixing ratio of the PBS resin is within the range of 85 to 95 wt%, while the mixing ratio of the PBAT resin is within the range of 5 to 15 wt%.

In other words, the PBS resin is mixed with PBS resin as the main resin, and the content of PBS resin is added to PBAT so that the structural strength of the fishing net can be secured with the highest priority. It is set higher than the resin, and the mixing ratio described above is the optimum ratio that can be applied to the present invention, and it is clear that the content of PBS resin may be adjusted up to 98 wt% if necessary.

As the aliphatic polyester constituting the biodegradable resin composition according to the present invention, a reactor used for synthesizing PBS resin and PBAT resin usually includes an esterification reaction device equipped with a stirring device, a condenser and a cooler, and high vacuum required for a condensation polymerization reaction. Each consists of a condensation polymerization reactor equipped with a vacuum system for maintenance.

The polymerization test was based on the results of the polymerization test using a B / T (polymerization reactor) and a lab-scale synthesis facility (3 kg), and the size of the semi-commercial 100L P / P or commercial scale was By performing a scale-up test with a dimension (commercial 5 m 3), various problems occurring in the polymerization process are solved, and polymerization conditions suitable for these resins are selected.

In order to polymerize the PBS resin, the molar ratio of succinic acid, which is an aliphatic dicarboxylic acid, and 1,4-butanediol, which is an aliphatic glycol, is 1: 1.5, and the temperature is raised in a nitrogen stream, and the temperature is increased to 2 to 3 under a temperature condition of 200 to 220 ° C. By carrying out the esterification reaction for a period of time, the theoretical amount of water is allowed to flow out, and then, the catalyst is added, the temperature is raised to 240 to 250 ° C, and the condensation polymerization is performed under high vacuum conditions of 1 Torr or less.

The condensation polymerization reaction is performed about 3 to 4 hours under the conditions, and the end point of the condensation polymerization reaction is determined by observing the torque of the stirrer included in the reactor, such a series of PBS resin polymerization The process is outlined in Scheme 1 below.

Reaction Table 1. Polymerization Process of PBS Resin

On the other hand, the PBAT resin is a mixture ratio of adipic acid and DMT in the dicarboxylic acid component is 50:50, the molar ratio of the total dicarboxylic acid and 1,4-butanediol which is aliphatic glycol is 1: 1.5, aliphatic dica Unlike PBS resin, which uses only succinic acid as the carboxylic acid, PBAT resin is a two-step reaction because the reaction product is water and methanol.

First, the temperature is raised in a nitrogen stream and DMT and 1,4-butanediol are added as raw materials, and the theoretical amount of methanol (CH ₃ OH) is distilled out by performing a transesterification reaction for about 2 hours under a temperature condition of 180 ° C. When the amount of methanol reached the theoretical value, the temperature was raised to 200-220 ° C., followed by additional adipic acid, followed by esterification for about 2 to 3 hours, thereby forming oligomers. While the theoretical amount of water flows out.

Subsequently, when the catalyst is added and the temperature is increased to about 240 to 250 ° C. and the polycondensation reaction is performed for about 3 to 4 hours under high vacuum conditions of 1 Torr or less, aliphatic / aromatic co-polyester ), And the end point of the condensation polymerization reaction is determined by observing the torque of the stirrer included in the reactor as in the PBS polymerization process. Shown.

Scheme 2. Polymerization Process of PBAT Resin

When manufacturing the fishing net 3 using the resin composition of the present invention consisting of a mixed resin of PBS resin and PBAT resin as described above, PBS can be further improved to improve the physical properties imparted to the fishing net 3. It is most preferable to use the mixed resin of the resin and the PBAT resin in an amount of 1 wt% to 5 wt% with an additive including an antioxidant, a UV stabilizer, and a dispersant.

The antioxidant is a compound which is added to a substance such as synthetic resin or rubber and is added to inhibit the automatic oxidation, which is a process of combining these substances with oxygen in the air at room temperature, and is usually organic such as aromatic amines, phenols, aminophenols, etc. Compounds are used as antioxidants and representative examples include butylated hydroxytoluene (BHT) or butylated hydroxyanisol (BHA).

The UV stabilizer, while the fish net (3) made of the biodegradable resin composition of the present invention has a stability against degradation or discoloration, such as mechanical properties, even if exposed to ultraviolet light for a long time, the same as the strength of the fishing net (3) It is added for the purpose of improving physical properties, and typical examples thereof include high molecular HALS and benzotriazole.

HALS: Hindered Amino Light Stabilizer

In addition, the dispersing agent is also commonly referred to as a surfactant, and when the biodegradable resin composition of the present invention is mixed to spun the netting thread for fishing nets 3, the interfacial resistance between the resin components is reduced to improve the flexibility of the netting thread. It is preferably used for the purpose and to use a polymeric nonionic surfactant such as polyethylene glycol and polyvinyl alcohol.

As described above, when an additive including an antioxidant, a UV stabilizer, and a dispersant is added at less than 1wt% based on a mixed resin of PBS resin and PBAT resin, the unique function of each additive cannot be properly exhibited. When the mixing amount of the additive exceeds 5wt%, it is uneconomical to compare the improvement of the physical properties by each additive and the amount of the additive used at the same time.

In addition, when it is based on the total amount of the additive, it is most preferable that the mixing ratio of the antioxidant, UV stabilizer and dispersant is 1: 1: 1, respectively, but based on the mixed resin of PBS resin and PBAT resin Since the amount of addition is very small, some additives may be further mixed by a ratio of about 1.5, and the content of the additives can be appropriately adjusted within a range that does not lower the physical properties of the resin.

The process according to the present invention for producing a fishing net (3) using the biodegradable resin composition as described above, as shown in the process block diagram of Figure 1, the resin mixing step of mixing the PBS resin and PBAT resin (S1) ), The compounding step (S2) of the mixed resin, the pellet forming step (S3) for pelletizing the resin compound, the dehumidification drying step (S4) for drying the pellets, and the mesh thread using the resin pellets It comprises a spinning step (S5), the netting step (S6) of the fishing net using the spinning net yarn, and the heat treatment step (S7) of the netted fishing net.

The resin mixing step (S1) is a polybutylene succinate (PBS: poly butylene succinate) resin as aliphatic polyester resin, polybutylene adipate terephthalate (PBAT: poly butylene adipate-co 5-15 wt% of terephthalate) resin in a mixer.

Mixer (Mixer) used in the resin mixing step (S1) is a representative example of a device equipped with a stirring blade inside the mixing tank, it is usually cut each resin component radiated in the form of a thread to a short length, respectively It is prepared by spinning the resin component in the form of short fibers, or each resin component is produced in the form of small chips, and then it is subjected to a process of mixing evenly in the mixing tank.

While mixing each resin evenly inside the mixing tank as described above, on the basis of 100wt% of the mixed resin of PBS resin and PBAT resin, an additive including an antioxidant, UV stabilizer and dispersant is added to the mixing tank. By adding 1 to 5wt% in the interior, each additive is to be mixed evenly with the resin component, the function and type of the additive and the reason for limitation on the addition amount and mixing ratio is as described above.

After the resin mixing step (S1) as described above, by heating the mixed resin of PBS resin and PBAT resin or a mixed resin containing additives to a temperature of 130 ~ 150 ℃, each resin component is one lump The compounding step (S2) to produce a resin compound (resin compound) united in the form.

The compound used in the compounding step (S2) is a typical example of a melting tank equipped with a heating means such as a burner or heating wire, the heating temperature of the mixed resin is 130 ℃ higher than the melting point (125 ℃) of PBAT resin The minimum heating temperature, but the maximum heating temperature is preferably adjusted to 150 ℃ or less to prevent changes in the physical properties of the resin and waste of energy.

After the compounding step (S2) as described above, a pellet molding step (S3) for molding the resin compound into a pellet (pellet) or chip (chip) for spinning processing by inserting the resin compound into an extruder When the resin compound is formed into pellets or chips of small particles, the resin compound is secondarily uniformly mixed during the spinning process of the mesh thread for the fishing net (3). Can contribute to the improvement of quality.

The extruder used in the pellet forming step (S3), the resin compound can be pulled out at a constant pressure, while the resin compound is condensed through the outlet to a certain size by a rotary cutter or the like as a representative example The smaller the size of the pellets or chips formed by the resin compound is advantageous, but the size of about 5mm is sufficient.

It is necessary to go through the dehumidification drying step (S4) to dehumidify and dry the resin pellets or resin chips molded into small particles through the pellet molding step (S3) as described above under a temperature condition of 70 ~ 90 ℃, resin pellets or resin When the chip is cooled by the water cooling method, the dehumidification drying step (S4) must go through essentially.

As described above, if the moisture existing on the surface of the resin pellet or the resin chip is removed through the dehumidification drying step (S4), it may provide more advantageous advantages in the workability and the degree of crystallization of the mesh thread in the spinning step (S5). have.

On the other hand, the temperature required for dehumidification and drying should be at least 70 ℃ for quick drying of resin pellets or resin chips, but the maximum temperature is 90 ℃ or less to prevent aggregation of resin pellets or resin chips and waste of energy. It is preferable to adjust to, and the drying method using a hot air may be applied as a drying method, a drying method using only a temperature may be applied.

After the pellet forming step (S3) and the dehumidification drying step (S4) as described above, the resin pellets or resin chips are put into the spinning machine, and the draw ratio of 6.0 to 7.0 after the multi-stage drawing under the cylinder temperature condition of 180 ~ 230 ℃. Spinning step (S5) for producing a mesh for fishing nets having a (3) and the net yarn manufactured through the spinning step (S5) in a double knot or single knot in a knitting machine (編 網 機: net weaving machine) Through the step S6 of manufacturing a fishing net (3) having a square or diamond mesh.

Although the spinning machine used in the spinning step (S5) and the knitting machine used in the sewing machine step (S6) is a rather complicated mechanism, since it is commonly used in the manufacture of the fishing net (3), a detailed description thereof will be omitted. In addition, the spinning process of the spinning machine and the mesh thread using the spinning step (S5) is also described in the technical information that the applicant has been filed as a patent application No. 10-942258 in 2009 patent application No. 10919.

In the spinning step (S5) the most important part in manufacturing the mesh for fishing nets (3) is that the spinning yarn to be a draw ratio of 6.0 ~ 7.0, the reason for limiting the draw ratio of the net yarn to 6.0 ~ 7.0 in this way When the draw ratio is less than 6.0, the elongation of the mesh thread for the fishing net 3 can be increased, but the strength becomes weak. When the draw ratio exceeds 7.0, the mesh thread is cut during spinning and the workability is deteriorated. to be.

In addition, the reason for limiting the cylinder temperature of the spinning machine to the range of 180 ~ 230 ℃, while ensuring sufficient fluidity of the resin extruded through the spinneret to improve the workability according to the manufacture of the mesh thread, due to excessive heating This is because it is the optimum range to prevent the oxidation of the resin component and perform economical work, and because the extrusion temperature may vary for each spinning machine, some error may occur based on the temperature range.

It is possible to manufacture the fishing net (3) just by passing through the spinning step (S5) and the knitting step (S6) as described above, but more preferably manufactured through a double knot or a single knot through the knitting step (S6). Heat treatment step of heat-treating the fishing net (3) in a wet method for about 10 to 20 minutes by immersing the fishing net (3) in a wet tank of 80 ~ 90 ℃ to further strengthen the net knot of the fishing net (3) (S7 ) To go through.

The reason for limiting the temperature range of 80 to 90 ℃ and the time range of 10 to 20 minutes as the heat treatment conditions of the fishing net 3 in the heat treatment step (S7) as described above, because the melting temperature of the resin is 115 ℃, weak to heat This is because it is an optimal range to prevent the strength deterioration of the fishing net (3) due to excessive heating and economical operation, and the treatment temperature and time may be different for each heat treatment unit. Of course, the degree of error may occur.

As a representative example of the phrase that can be applied to the fishing net (3) manufactured through a series of processes according to the present invention as described above, the fishing net 8 phrase shown in Figures 3 and 4 or shown in Figures 5 and 6 The trap 9 becomes a phrase.

As shown in FIG. 3, the fishing net 8 has a protective net 3a, 3b having a width of about 0.5 to 1 nose at the upper and lower ends of the fishing net 3 in a knitting process, and these protective nets 3a ( Heat treatment with the nose strings 4a and 4b attached to the upper and lower portions of 3b), and the moxibustion 5 and the needle 6 on the nose strings 4a and 4b during the assembly of the fishing gear. Will be connected.

In the case of the trap 9 is also shown in Figure 4 in the process of sewn in the top and bottom of the fishing net (3) is attached to the nose rope 4a (4b) is heat treated, as shown in Figure 6 In the process of assembling the fishing gear (3) is to be fitted along the frame (7) by cutting the fishing net (3) to fit.

Since the protective net (3a) (3b) is to protect the fishing net (3), may be prepared using a conventionally applied hardly decomposable aromatic polymer synthetic resin, if necessary, the biodegradable resin composition of the present invention It is also possible to know that it is possible.

When the fishing net 3 is manufactured using the biodegradable resin composition according to the present invention as described above, it is possible to apply different physical properties of the PBS resin and PBAT resin at the same time, the structural While sufficient strength is secured, the flexibility and elongation recovery required for the fishing net 3 can be simultaneously provided.

Therefore, when the fishing net 3 is applied to the fishing net 8 fishing gear that catches the fish in the mesh and the trap 9 trapping the fish to enter the fishing net 3 along the attraction trap, It is possible to prevent the reduction and damage of the fishing net (3) in advance, which can not only provide a fishing net (3) with a very high practical value, but also improve the convenience and economic efficiency of the fishing industry. It will also contribute to the improvement.

After spinning the biodegradable fishing nets with a diameter of 0.284 mm by the above manufacturing method, a magnetic net 8 having a mesh length of 51 mm was manufactured, and developed by the present invention and the existing nylon mesh net for reference groups at sea. Table 1 shows the results of the comparison of the catch performance per biodegradable net by the biodegradable net, and there was no difference in the catch performance between the two. Also, the biodegradable net was not broken in the process of manpower and machine. Practicality was shown to be high.

Number of catches of reference group by nylon and biodegradable net Full length (cm) Nylon mesh Biodegradable net 15-18 0 One 19-21 15 17 22-24 15 19 25-27 One 0 Total catch 31 37 Total catch (g) 3,070 3,152

Example 1: 95 wt% of PBS resin, 5 wt% of PBAT resin, and 2 wt% of an additive mixed with an antioxidant, a UV stabilizer, and a dispersant in a 1: 1: 1 ratio were mixed in a mixer, and then the mixed resin was 130 The resin compound was prepared by heating to a temperature of ℃, the resin compound was molded into a resin pellet of 5mm size, the resin pellet was dehumidified and dried at a temperature of 80 ℃, the resin pellet was introduced into a spinning machine 6.5: After spinning a wire of 0.284mm diameter at an elongation of 1, using a wire netted double-knotted with a knitting machine so that the size of the mesh is 51mm, and then heat-treated the fishing net for 16 minutes in a wet bath at 86 ℃ to produce a fishing net .

Example 2: 95 wt% of PBS resin, 5 wt% of PBAT resin, and 2 wt% of an additive mixed with an antioxidant, a UV stabilizer, and a dispersant in a 1: 1: 1 ratio were mixed in a mixer, and then the mixed resin was 130 The resin compound was prepared by heating to a temperature of ℃, the resin compound was molded into a resin pellet of 5mm size, the resin pellet was dehumidified and dried at a temperature of 80 ℃, the resin pellet was put into a spinning machine 6.7: After spinning the net yarn of 0.403mm diameter at an elongation of 1, using the net yarn was double-knotted with a twine so that the size of the mesh is 240mm, and the fishing net was heat-treated for 18 minutes in a wet bath at 84 ℃. .

Example 3: 95 wt% of PBS resin, 5 wt% of PBAT resin, and 2 wt% of an additive mixed with an antioxidant, a UV stabilizer, and a dispersant in a 1: 1: 1 ratio were mixed in a mixer, and then the mixture was 130 The resin compound was prepared by heating to a temperature of ℃, the resin compound was molded into a resin pellet of 5mm size, the resin pellet was dehumidified and dried at a temperature of 80 ℃, the resin pellet was introduced into a spinning machine 6.2: After spinning a mesh of 0.2 mm diameter at an elongation of 1, the yarns were twisted with 12 strands of wire mesh and knotted with a knitting machine so that the size of the mesh was 22 mm. Produced.

1: buoy 2: buoy line 3: fishing net
3a, 3b: Protection net 4a, 4b: Nose rope 5: Moxibustion
6: acupuncture 7: frame 8: net
9: outbreak

Claims (7)

delete delete In the manufacturing method of the fishing net using a biodegradable resin composition,
85 to 95 wt% of polybutylene succinate (PBS) resin and 5 to 15 wt% of polybutylene adipate-co-terephthalate (PBAT) as aliphatic polyester resin Resin mixing step of mixing in a mixer (S1),
Compounding step (S2) for producing a resin compound by heating the resin mixed through the resin mixing step (S1) to a temperature of 130 ~ 150 ℃,
Pellet molding step (S3) for extruding the resin compound prepared through the compounding step (S2) in the form of pellets (pellet),
Spinning the resin pellets prepared through the pellet forming step (S3) into a spinning machine, spinning the cylinder temperature of the spinning machine to 180 ~ 230 ℃ and multi-stretching at a draw ratio of 6.0 ~ 7.0 spinning yarn for fishing nets ( S5),
Method for producing a fishing net using a biodegradable resin composition, characterized in that consisting of the netting step (S6) of the fishing net using the net yarn obtained through the spinning step (S5). [4] The biodegradable resin composition according to claim 3, wherein the biodegradable resin composition further comprises a heat treatment step (S7) of heat-treating the netted fish net in a wet bath at 80 to 90 ° C after passing through the hatching step (S6). Manufacturing method of used fishing net. The method of claim 3 or 4, wherein in the resin mixing step (S1), a mixed resin of 85 to 95 wt% of PBS resin and 5 to 15 wt% of PBAT resin is 100wt%, and an antioxidant, a UV stabilizer and a dispersant are used. A method of manufacturing a fishing net using a biodegradable resin composition, characterized in that the additive further comprises 1 to 5wt%. According to claim 3 or 4, Between the pellet forming step (S3) and spinning step (S5) includes a dehumidification drying step (S4) for dehumidifying and drying the resin pellets under a temperature condition of 70 ~ 90 ℃ Method for producing a fishing net using a biodegradable resin composition, characterized in that. According to claim 5, Between the pellet forming step (S3) and spinning step (S5) characterized in that the dehumidification drying step (S4) for dehumidifying and drying the resin pellets under a temperature condition of 70 ~ 90 ℃ Method for producing fishing net using biodegradable resin composition.

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