JP6898462B2 - Resin structure and manufacturing method of resin structure - Google Patents

Description

The present invention relates to a resin structure and a method for producing the resin structure.

Separate the oil from household wastewater that is drained when cooking at home, the oil that is collected in grease traps installed in commercial kitchens, and the oil that spills into the ocean, harbors, rivers, etc. from water. It is required to collect it.

For example, Patent Document 1 describes an oil filter in which a filter material in which a non-woven fabric composed of polypropylene long fibers is bundled in a cylindrical shape is filled in a spiral shape in a body of a container.

Further, Patent Document 2 describes an oily substance adsorbent obtained by fixing a part of a bundle of a plurality of fibers or ribbons to a rope-shaped member. Patent Document 2 describes that the fiber or ribbon-like material may be made of a thermoplastic resin such as polypropylene as a raw material. Further, Patent Document 2 describes that a bundle of fibers or ribbons is fixed to a rope-shaped member by thermal binding or the like.

Japanese Unexamined Patent Publication No. 49-115090 Japanese Unexamined Patent Publication No. 2001-10703

As described in Patent Document 1 and Patent Document 2, a method of selectively collecting oil using a resin having an affinity for oil is known. However, the oil filter described in Patent Document 1 does not have a very high oil collection efficiency, and the oily substance adsorbent described in Patent Document 2 can be used in a limited range of situations such as the sea and rivers. It could only be used in place.

In view of the above problems, it is an object of the present invention to provide a resin structure having high oil collecting efficiency and capable of collecting oil in a wide range of situations, and a method for producing the resin structure.

The resin structure according to one aspect of the present invention for solving the above problems is a resin structure including a film folding body in which a resin film is folded in one direction, and the film folding body is the said folding body. This is a resin structure in which a liquid intake surface is formed by partially adhering ends of the resin film in a direction orthogonal to the folded direction. When the liquid containing oil is brought into contact with the liquid intake surface, the resin structure allows the liquid to enter the inside of the resin structure and collects the oil.

Further, in the method for manufacturing a resin structure according to one aspect of the present invention for solving the above problems, the step of folding the resin film in one direction and the folding direction of the folded resin film are orthogonal to each other. It includes a step of cutting in the direction of cutting and a step of adhering the ends of the resin film in the direction orthogonal to the folded direction in the same resin film in the cross section generated by the cutting.

According to the present invention, there is provided a resin structure having high oil collecting efficiency and capable of collecting oil in a wide range of situations, and a method for producing the resin structure.

FIG. 1 is a schematic view showing a resin structure according to the first embodiment of the present invention. FIG. 2 is a schematic view showing a state in which the resin film is passed through a ring and the resin film is folded in the method for manufacturing a resin structure according to the first embodiment of the present invention. FIG. 3 is a schematic view showing a state in which a plurality of film-folded precursors are bundled in the method for producing a resin structure according to the first embodiment of the present invention. FIG. 4 is a schematic view showing a heating cutter used in the method for manufacturing a resin structure according to the first embodiment of the present invention. FIG. 5 is a schematic view showing a state of cutting a resin structure precursor in the method for producing a resin structure according to the first embodiment of the present invention. FIG. 6 is a photograph showing a state in which a plurality of resin structures are bundled into a flower shape or the like. FIG. 7 is a schematic view showing an embodiment in which a plurality of resin structures are used as oil-water separation membranes in the second tank of the grease trap. FIG. 8 is a schematic view showing a resin structure according to a second embodiment of the present invention. FIG. 9 is a schematic view showing a resin structure according to a third embodiment of the present invention. 10 (a), 10 (b) and 10 (c) show that in the method for producing a resin structure according to a third embodiment of the present invention, a resin film is pulled out from the original film by a predetermined length. It is a schematic diagram which shows the state of folding from an end part. 11 (a) and 11 (b) are schematic views showing a film-folded precursor obtained in the method for producing a resin structure according to a third embodiment of the present invention. FIG. 12 (a) is a photograph of the resin structure before being rotated by the rotating machine in Example 3 of the present invention, and FIG. 12 (b) is a photograph of the resin structure before being rotated by the rotating machine in Example 3 of the present invention. It is a photograph of the resin structure after the rotation. FIG. 13 is a graph in which the relationship between the film filling rate obtained in Example 5 of the present invention and the amount of oil collected per 1 g of the resin film is plotted, and each plot is connected for each height of the resin structure. is there. FIG. 14 is a diagram showing a situation in which the shape holding force is measured using a measuring device in the sixth embodiment of the present invention.

Hereinafter, a plurality of embodiments relating to the resin structure of the present invention will be described with reference to the drawings.

[First Embodiment]
(Resin structure)
FIG. 1 is a schematic view showing a resin structure according to the first embodiment. As shown in FIG. 1, the resin structure 2 according to the present embodiment includes a film folding body 4 in which a resin film is folded in one direction. In FIG. 1, the resin structure 2 is composed of a plurality of film folding bodies 4, but may be composed of one film folding body 4.

The film folding body 4 is formed by folding a resin film in one direction. The folding method of the resin film is not particularly limited, and the resin film may be folded regularly or irregularly. At this time, it is not necessary to form a folding line. Although the folded resin films partially come into contact with each other, the resin films are shrunk in one direction to the extent that the surfaces of the same resin film do not come into excessive contact with each other, and wrinkles are formed. It should be folded to the extent.

In the film folding body 4, the resin film folded in one direction is cut in a direction substantially parallel to the folding direction (see FIG. 5), and the folding direction generated by the cutting is the same as the folding direction. The ends in the orthogonal directions are partially adhered to each other in the same resin film. As a result, in the film folding body 4, a surface (liquid intake surface 5) in which the end portions are partially adhered to each other is formed at the end portion generated by the cutting.

The liquid intake surface 5 is imparted with strength by the above-mentioned partial adhesion. As a result, the film folding body 4 can maintain the folded shape even without a binding member or the like. Further, the liquid intake surface 5 has a plurality of openings formed in a portion where the ends of the resin film are not partially adhered to each other. As a result, the film folding body 4 can allow the liquid to penetrate into the film folding body 4 through the plurality of openings of the liquid taking-in surface 5.

The adhesion may be such that a plurality of openings for allowing the liquid to enter are formed in a part of the liquid intake surface 5 while imparting a predetermined strength to the liquid intake surface 5. Examples of the above-mentioned adhesion include fusion of the ends of the resin film by heat, adhesion of the ends of the resin film by application of an adhesive, and the like.

Further, in the film folding body 4, inside the liquid taking-in surface 5, the wall 4a made of the folded resin film extends in a direction substantially perpendicular to the liquid taking-in surface 5, and is between the walls 4a. , A plurality of voids are formed which are open to the liquid intake surface 5 and whose side wall is a resin film. The plurality of voids can be spaces (flow paths) through which the liquid can enter through the opening of the liquid intake surface 5 extending in a direction substantially perpendicular to the liquid intake surface 5. It is preferable that each of the voids has a substantially constant diameter with respect to the passage direction of the liquid.

On the other hand, in the film folding body 4, since the side wall of the gap is generally formed of a resin film having low liquid permeability, the gap can be reached from the direction of the side surface when the liquid intake surface 5 is the upper surface. Limit the ingress of liquids.

The resin structure 2 having such a structure allows the liquid to enter the inside of the resin structure 2 from the liquid intake surface 5 when the liquid containing oil is brought into contact with the liquid intake surface 5. The oil contained in the liquid can be collected inside the resin structure 2. The liquid containing the oil may be a liquid consisting only of oil or a mixed liquid containing oil and water. When the liquid is a mixed liquid containing oil and water, the resin structure 2 allows the mixed liquid to enter the inside of the resin structure 2 from the liquid intake surface 5 and causes the oil to enter the inside of the resin structure 2. Can be selectively collected internally. It is considered that the above-mentioned oil collection is due to the high affinity of the resin film for the oil. In particular, since the affinity of the resin film for the oil is higher than the affinity of the resin film for water, it is considered that the resin structure 2 can selectively collect the oil from the mixed liquid containing the oil and water. ..

In addition, in the resin structure 2, solid oil, oil contained in dust and indoor / outdoor dirt, etc., for example, the liquid intake surface 5 of the resin structure 2 is brought into contact with the dust and dirt, and the like. By rubbing and liquefying these oils by frictional heat, they can penetrate into the resin structure 2 and be collected.

When the resin structure 2 is actually used, the liquid oil or the mixed liquid may be poured onto the liquid intake surface 5 and applied, but the resin structure 2 is added to the liquid containing the oil. It may be immersed or the liquid intake surface 5 may be simply brought into contact with the oil or the mixed solution spread in the form of a thin film. The resin structure 2 can allow the liquid containing the oil to enter the inside of the resin structure 2 through the plurality of openings, probably due to the capillary phenomenon, without applying pressure or the like.

The height of the film folding body 4 (thickness: the length of the film folding body 4 in a direction substantially orthogonal to the folding direction) is 0.3 cm or more from the viewpoint of facilitating the production of the film folding body 4. It is preferable, and at the same time, from the viewpoint of further enhancing the oil collection efficiency, it is preferably 0.3 cm or more and less than 3.0 cm, more preferably 0.3 cm or more and less than 2.0 cm, and 0.3 cm or more 1 It is more preferably less than .2 cm, and even more preferably 0.5 cm or more and less than 1.2 cm. It should be noted that the height of 0.3 cm or more and less than 3.0 cm is preferable from the viewpoint of making the resin structure 2 a compact size. On the other hand, since the end portion of the resin film is partially adhered to the film folding body 4, the film folding body 4 can be folded even at a height of less than 3.0 cm even without a binding member or the like. It is possible to maintain the shape of the film.

The thickness of the resin film constituting the film folding body 4 is preferably 5 μm or more and 40 μm or less.

In FIG. 1, a plurality of film folding bodies 4 having substantially the same shape are assembled to form a resin structure 2. In the present embodiment, in the plurality of film folding bodies 4, the liquid intake surfaces 5 of the respective film folding bodies 4 are located on the same plane, and the walls of the respective film folding bodies 4 due to the folded resin film. 4a is arranged so as to extend in substantially the same direction. In FIG. 1, the plurality of film folding bodies 4 are arranged in contact with each other while maintaining their respective shapes (substantially cylindrical shapes), but the resin films constituting the plurality of film folding bodies 4 are denser. It is not necessary that the plurality of film folds 4 can be individually separated and discriminated from the appearance.

Further, the ends of the plurality of film folding bodies 4 in a direction orthogonal to the folding direction are partially adhered to each other even between the plurality of film folding bodies 4. As a result, the resin structure 2 can maintain a predetermined shape (substantially cylindrical in FIG. 1) even without a binding member or the like. The partial adhesion between the plurality of film folding bodies 4 may be performed over the entire end surface of the resin structure 2 formed by aggregating the plurality of liquid intake surfaces 5, or may be partially adhered to the plurality of film folding bodies 4. It may be performed (for example, only on the peripheral edge of the end face of the resin structure 2).

Further, the resin structure 2 may have the liquid intake surface 5 to which the above-mentioned partial adhesion is performed only on one end portion, or the above-mentioned partial adhesion is performed to both ends. It may have a liquid intake surface 5.

The filling ratio of the resin film with respect to the total volume of the resin structure 2 is preferably larger than 1.7 vol% and less than 22.3 vol%, and is 2.2 vol% or more from the viewpoint of further improving the oil collection efficiency. It is more preferably 13.4 vol% or less, and further preferably 3.1 vol% or more and 8.9 vol% or less from the viewpoint of improving the shape retention while further increasing the oil collection efficiency.

For example, when a plurality of film folding bodies 4 are assembled to form a substantially columnar resin structure 2 as shown in FIG. 1, the filling rate of the resin film may be calculated by the following formula. ..
Film filling rate = {[Thickness (cm) x Width (cm) x Length (cm) of resin film] x Number of film folds 4] / [Radius (cm) ² x pi of resin structure 2] π x height (cm)]} x 100

Alternatively, the specific gravity of the resin composition constituting the resin film is obtained by melting and resolidifying the resin film constituting the resin structure 2, and the resin composition is molded into a bulk shape in the shape of the resin structure 2. The film filling ratio may be the ratio of the mass calculated from the specific gravity at that time to the actual mass of the resin structure 2.

(Resin film)
The resin film may be formed by molding a resin composition containing a resin and optionally added additives into a film shape.

The type of the resin is not particularly limited, but it is preferably a polyvinylidene chloride-based resin (hereinafter, also simply referred to as “PVDC resin”), a polyvinylidene chloride, a polyester, a polyolefin, or the like. Examples of the polyolefins include polyethylene, polypropylene and the like. The resin composition may contain only one of these resins, or may contain two or more of these resins.

Of these resins, polyvinylidene chloride-based resins, polyethylene, and polyvinyl chloride are preferable because they have self-adhesiveness and have shape-retaining power and elastic recovery power after folding. Polyvinylidene chloride resin is more preferable because of its high self-adhesiveness.

The polyvinylidene chloride-based resin (PVDC resin) is preferably a copolymer of vinylidene chloride and a comonomer copolymerizable with vinylidene chloride.

The content of vinylidene chloride in the PVDC resin is preferably 60% by mass or more and 98% by mass or less, more preferably 65% by mass or more and 97% by mass or less, and 70% by mass or more and 95% by mass or less. It is more preferable, and it is particularly preferable that it is 75% by mass or more and 90% by mass or less. On the other hand, the content of the comonomer in the PVDC resin is preferably 2% by mass or more and 40% by mass or less, more preferably 3% by mass or more and 35% by mass or less, and 5% by mass or more and 30% by mass or less. % Or less is more preferable, and 10% by mass or more and 25% by mass or less is particularly preferable. When the content of the comonomer is 2% by mass or more, the PVDC resin can be more sufficiently internally plasticized, and the melt processability of the PVDC resin can be further improved. When the content of the comonomer is 40% by mass or less, the gas barrier property and the water vapor barrier property of the resin film can be further enhanced.

Examples of the comonomer include vinyl chloride (VC), methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, stearyl acrylate, and the like, and the alkyl group has one or more carbon atoms. An alkyl group containing 18 or less alkyl acrylate compounds, methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, stearyl methacrylate, etc. has 1 or more and 18 or less carbon atoms. A certain methacrylic acid alkyl ester compound, acrylonitrile, a vinyl cyanide compound containing methacrylic acid and the like, an aromatic vinyl compound containing styrene and the like, and a vinyl aliphatic carboxylic acid containing vinyl acetate and the like and having 1 or more and 18 or less carbon atoms. Ester compounds, alkyl vinyl ether compounds with an alkyl group having 1 or more and 18 or less carbon atoms, vinyl polymerizable unsaturated carboxylic acids including acrylic acid, methacrylic acid, maleic acid, fumaric acid, and itaconic acid, maleic acid, fumaric acid, etc. , And an alkyl ester of a vinyl polymerizable unsaturated dicarboxylic acid (including a partial ester) including itaconic acid, glycidyl acrylate, and a diene containing an epoxy group-containing vinyl monomer including glycidyl methacrylate, butadiene, and isoprene. Includes based monomers, chlorinated diene monomers containing chloroprene and the like, divinylbenzene, ethylene glycol diacrylate, and polyfunctional monomers having two or more polymerizable double bonds in the molecule containing ethylene glycol methacrylate and the like. .. These comonomer may be used alone or in combination of two or more. Among these comonomer, vinyl chloride (VC), methyl acrylate, ethyl acrylate, butyl acrylate, and lauryl acrylate are preferable, and vinyl chloride (VC) is more preferable.

The resin film may be a commercial or household wrap film or a food wrap film. The wrap film may be an unrolled wrap film, or may be a wrap film wound in a cylindrical shape or the like. Further, it may be a laminated body of wrap films formed by laminating a plurality of wrap films.

Examples of the additives include plasticizers, stabilizers, pressure-sensitive adhesives, tackifiers, pigments, lubricants, antioxidants, fillers, surfactants and the like.

The resin structure 2 may be formed by assembling a plurality of film folding bodies 4 made of the same resin composition, or may be a film folding body 4 made of partially different resin compositions. It may include.

(Manufacturing method of resin structure)
The resin structure 2 includes a step of folding the resin film in one direction (first step) and a step of cutting the folded resin film in a direction orthogonal to the folded direction (second step). Manufactured by a method having a step (third step) of adhering ends of the resin film in a direction orthogonal to the folded direction in the same resin film in the cross section generated by the cutting. can do.

In the first step, the resin film is folded in one direction. The resin film may be produced by molding the above-mentioned resin composition into a film by a known method so that the thickness is, for example, 5 μm or more and 40 μm or less. Further, the above resin film may be prepared by purchasing a commercially available resin film or the like.

The above folding method is not particularly limited, but from the viewpoint of suppressing the collapse of voids due to the surfaces of the same resin film coming into close contact with each other when the resin film having high self-adhesiveness is folded, it is more than the width of the resin film. A method is preferable in which the resin film is narrowed and passed through a ring or the like having a small opening diameter, and the resin film is formed into a string shape.

FIG. 2 is a schematic view showing a state in which the resin film is passed through the ring and the resin film is folded. First, a film raw fabric 10 and a ring 12 in which a resin film is wound in a roll shape are prepared. In the present embodiment, the film raw fabric 10 is a commercially available resin film having a width of about 30 cm. Further, the ring 12 is a tubular metal ring having an inner diameter of 15 mm and an opening 12a having an inner diameter of 14 mm in the center.

As shown in FIG. 2, the resin film 14 is drawn out from the original film 10 and narrowed, and the resin film 14 is passed through the opening 12a of the ring 12 to be formed into a string shape. Then, the resin film 16 formed into a string shape is cut to a predetermined length to prepare a film fold precursor 4'. By repeating this operation, a plurality of film fold precursor precursors 4'are obtained.

In the second step, the film folding precursor 4'is cut to the height of the film folding body 4. When producing the resin structure 2 in which a plurality of film folds 4 are assembled, it is preferable to bundle the plurality of film fold precursors 4'and cut them at the same time. FIG. 3 is a schematic view showing a state in which a plurality of film folding precursors 4'are bundled. In FIG. 3, a plurality of film-folded precursors 4'are bundled to form a resin structure precursor 2', and the resin structure precursor 2'is filled in a pipe 6 such as a vinyl chloride pipe. In this way, it becomes easy to feed out the plurality of film-folded precursors 4'from the tube 6 and cut them at the same time. When the resin structure 2 is produced from one film-folded precursor 4', one film-folded precursor 4'may be used as it is as the resin structure precursor 2'.

In the third step, the stepped portion of the cut film fold precursor 4'is adhered. At this time, the ends of the film folding precursor 4'are adhered in the same resin film. When producing a resin structure 2 in which a plurality of film folds 4 are assembled, the plurality of ends of the assembled film fold precursor 4'in a direction orthogonal to the fold direction are formed. Adhere between the film fold precursors 4'.

The above-mentioned adhesion may be fusion by heat or adhesion by an adhesive. In the present embodiment, it is preferable that the second step and the third step are performed at the same time by cutting the film fold precursor 4'with a heating cutter in the second step. At this time, by blowing air from the end side in the direction orthogonal to the folding direction of the resin film to the film folding precursor 4', the cut ends are partially adhered (fused). Moreover, it is possible to form a plurality of openings that do not partially adhere (fuse).

FIG. 4 is a schematic view showing a heating cutter used in the present embodiment. The heating cutter 8 is a table 15 on which a tube 6 filled with the resin structure precursor 2'to be cut is placed, a cutting line 18 for cutting the resin structure precursor 2', and a temperature for heating the cutting line 18. A temperature control unit 13 for adjusting the temperature and a blower unit 19 for blowing air to the resin structure precursor 2'being cut are provided. The cutting wire 18 may be a nichrome wire generally used for cutting while heating Styrofoam, an iron chrome wire, a stainless steel wire, and an electric wire such as an iron / chrome / aluminum alloy. It may be a heat ray.

A worker who manufactures the resin structure 2 using the heating cutter 8 turns on the power of the heating cutter 8 and then heats the cutting line 18 by the temperature control unit 13 (heating step). The heating may be performed so that the temperature of the cutting line 18 becomes 120 ° C. or higher and 250 ° C. or lower, although it depends on the melting point of the resin composition and the like.

Next, the operator activates the blower unit 19 by a switch (not shown) to blow air from the blower unit 19 in the direction of the cutting line 18 (direction of arrow A in the figure). The wind speed of the air to be sent is preferably 6 m / s or more and 12 m / s or less, and more preferably 7 m or more and 11 m or less per second.

In this state, the operator causes one end of the resin structure precursor 2'protruding from the pipe 6 as shown in FIG. Then, the pipe 6 is arranged on the table 15 so that the end portion of the resin structure precursor 2'on the protruding side faces the cutting line 18 side. Next, after the side surface of the resin structure precursor 2'is brought into contact with the heated cutting line 18, the tube 6 is placed in a direction substantially orthogonal to the direction in which the resin film is folded (direction of arrow B in the figure). Move to cut the resin structure precursor 2'. In the above cutting, it is preferable to move the pipe 6 so that the moving speed of the resin structure precursor 2'with respect to the cutting line 18 is in the range of 0.3 cm per second or more and 1.0 cm or less per second, and 0.4 cm or more per second per second. It is more preferable to move the tube 6 so that the range is 0.8 cm or less.

By the blowing air, the cut end portion of the resin structure precursor 2'is cooled at the same time as cutting. Therefore, the entire surface of the cut end portion due to the excessive dissolution of the resin film is not fused, and the sealing of the opening by the fusion of the resin film is limited. Further, since the end portion of the resin film after being cut is immediately cooled by the above-mentioned ventilation, fusion of the end portions of the resin film after cutting is also suppressed. As a result, the end portion formed by the above-mentioned cutting of the produced resin structure 2 has a plurality of openings in which the end portions of the resin film partially adhere to each other and do not partially adhere to each other, and the liquid is taken in. The surface 5 is formed.

By appropriately controlling the temperature of the cutting line 18, the wind speed, the moving speed of the pipe 6, and the like at this time, the size of the opening of the liquid intake surface 5 is changed, and the liquid infiltrates due to the capillary phenomenon. It is also possible to change the ease of use, the efficiency of collecting oil, the strength of the resin structure 2, and the like. According to the findings of the present inventors, if the air is not blown at the time of cutting by the cutting line 18, the wider area of the cut end portion of the resin film is fused, and the liquid easily penetrates. And the oil collection efficiency is also reduced.

In this way, while feeding out the film folding precursor 4', cutting by the heated cutting line 18 while blowing air is repeated, so that the liquid take-in in which the above-mentioned partial adhesion is performed to both ends is performed. A resin structure 2 having a surface 5 is obtained. On the other hand, while feeding out the film folding precursor 4', cutting by the heated cutting line 18 and cutting by the unheated cutting line 18 are alternately performed, so that the above-mentioned partial adhesion is performed only to one end portion. A resin structure 2 having a liquid intake surface 5 is obtained.

At this time, instead of air, an inert gas such as nitrogen gas or argon gas may be sprayed.

(Use)
The resin structure 2 can be used as an oil collector for collecting oil in home kitchens, commercial kitchens, oceans, harbors, rivers, and the like.

When used in a home kitchen, a resin structure 2 as an oil collector may be placed inside a triangular corner to absorb oil from household wastewater, and the oil collector may be inside the kitchen or other drainage pipe. The resin structure 2 may be arranged to collect the oil in the wastewater. Since the resin structure 2 is easily deformed according to the cross-sectional shape of the drain pipe, it is easy to arrange and take out the resin structure 2 at the triangular corner or the drain pipe.

Also, even if the resin structure 2 is used to wipe off oil adhering to cooking utensils such as frying pans, tableware, top plates of IH heaters, grilled fish, gas stoves, stainless steel work tables, sinks, tiles, etc. Good. When wiping off the oil, if the resin structure 2 is impregnated with a small amount of water, the oil can be efficiently floated and wiped off. At this time, as shown in FIG. 6, a plurality of resin structures 2 may be bundled into a predetermined shape such as a flower shape. The flower-shaped resin structure 200 has a good workability for the operator because a finger is inserted between the petals and a fit is generated when the resin structure 200 is gripped. On the other hand, since the resin structure 2 has appropriate flexibility and shape stability, water and oil can be easily removed from the resin structure 200 by a worker squeezing the resin structure 200 by hand, and then the oil. It is easy to restore the collector 200 to its original shape. In FIG. 6, the resin structure in which a plurality of film folding bodies are wound by a winding body is bundled to form an oil collector 200 as in the second embodiment described later, but as in the first embodiment. A resin structure that does not use a wound body may be bundled to form an oil collector.

Further, the resin structure 2 may be arranged on the grease trap of the commercial kitchen to absorb the oil contained in the waste liquid accumulated in the grease trap. It is difficult to see how much oil has accumulated in the grease trap, and it is often the case that a specialist is asked to recover the oil. However, simply by spraying the resin structure 2 on the grease trap, it accumulates easily and at low cost. It is also possible to recover the grease trap.

Further, by spraying a large number of resin structures 2 on the water surface of the ocean, harbor, river, etc., the oil content that has flowed out to these water surfaces can be recovered.

Alternatively, the resin structure 2 can also be used as an oil-water separation membrane. FIG. 7 is a schematic view showing an embodiment in which a plurality of resin structures 2 are used as oil-water separation membranes in the second tank of the grease trap.

As shown in FIG. 7, a general grease trap 70 collects the first tank 71 into which drainage from a kitchen or the like is input, the second tank 72 that separates oil and water, and the water separated from the oil. It has a third tank 73 to be used. The first tank 71 and the second tank 72 communicate with each other on the bottom side, and the second tank 72 and the third tank 73 communicate with each other on the liquid level side. In FIG. 7, the flow direction of the treated wastewater is indicated by an arrow.

The first tank 71 has an inlet 74 into which drainage is input and a mesh basket 75. The drainage discharged from the inlet 74 removes leftover food, vegetable waste, and the like contained in the drainage charged in the basket 75, and moves to the bottom side where the first tank 71 and the second tank 72 communicate with each other. At the bottom, solids such as sludge settle, and the liquid containing water and oil moves to the liquid surface side of the second tank 72.

In the second tank 72, oil having a smaller specific density is floated on the liquid surface side to separate the oil and water. At this time, the oil having a smaller specific density stays on the liquid surface side of the second tank 72 to form an oil layer 77, and the water having a larger specific density forms a water layer 78 on the bottom side of the oil layer 77, and then the water layer 78 is formed. It moves from the bottom side of the second tank 72 to the third tank 73.

The third tank 73 further separates the solids and oil from the water. Even at the bottom where the second tank 72 and the third tank 73 communicate with each other, solid matter such as sludge precipitates, and the liquid containing water and oil moves to the liquid surface side of the third tank 73. After that, in the third tank 73, the oil having a smaller specific density floats to the liquid surface side, the oil and the water are separated, and only the water is discharged from the trap pipe 76 to the sewer or the like.

In the second tank 72, oil is periodically added to prevent the generation of offensive odor due to the oxidation of the oil separated on the liquid surface side, the generation of clogging due to the oil, and the decrease in the trapping efficiency due to the accumulation of oil on the liquid surface side. It is required to collect it. However, when trying to recover oil with a bucket or a cassotte, for example, even if the second tank 72 is observed from the liquid level side, it is difficult to visually determine the amount (depth) of the accumulated oil, so to what extent. It is difficult to judge whether to scoop up the oil.

Here, the resin constituting the resin structure 2 has a specific gravity higher than that of oil. For example, a film made of a resin composition containing a polyvinylidene chloride resin has a specific density of about 1.7, and a general oil such as edible oil or heavy oil has a specific density of 0.9. Further, since the resin structure 2 has a large volume of voids inside the resin structure 2, a larger amount of oil than the resin can be allowed to enter the inside of the resin structure 2 and be collected. The resin structure 2 in which a sufficient amount of oil is collected inside the voids has an apparent specific gravity (average specific density of the resin structure 2 and the collected oil) larger than that of oil and larger than that of water. It becomes smaller.

Therefore, when the resin structure 2 is put into the second tank 72, the resin structure 2 that collects the oil stays at the interface between the oil layer 77 and the water layer 78 and acts as an oil-water separation membrane that separates them. Therefore, when the oil is put into the second tank 72 from the liquid level side, the resin structure 2 as the oil-water separation membrane acts as a barrier, so that the depth at which the bucket or the cassotte is inserted can be easily determined, and only the oil can be efficiently recovered. Becomes easier.

At this time, the resin structure 2 produced from the resin composition containing the above-mentioned resin is good as an oil-water separation membrane because the apparent specific gravity after collecting the oil is larger than that of oil and smaller than that of water. Can be used for. From the viewpoint of making it easier to stay at the interface between the oil layer and the water layer as an oil-water separation membrane, the specific gravity of the resin constituting the resin composition is preferably 1.2 or more and 1.8 or less, and 1.3 or more and 1.7. The following is more preferable. Examples of resins having such a specific density include PVDC resins, polyvinylidene chlorides, polyesters and the like.

Further, at this time, the resin structure 2 may be colored from the viewpoint of making it easy to visually distinguish the resin structure 2 that remains at the interface between the oil layer and the water layer.

Further, the resin structure 2 as the oil-water separation membrane is used not only in the second tank of the grease trap but also in a known liquid tank in which a liquid containing oil and water stays to form an oil layer and an aqueous layer. It can be used to separate the oil layer and the water layer.

[Second Embodiment]
(Resin structure)
FIG. 8 is a schematic view showing a resin structure according to the second embodiment. As shown in FIG. 8, the resin structure 22 according to the present embodiment includes a plurality of film folding bodies 4 in which a resin film is folded in one direction, and a winding body 7 for winding the plurality of film folding bodies 4. And have. The structure of the film folding body 4 is the same as that of the first embodiment. Other parts that overlap with the first embodiment will not be described.

By winding the plurality of film folding bodies 4, the winding body 7 suppresses the resin films of the film folding bodies 4 from separating from each other during use, and further enhances the strength of the resin structure 2. The winding body 7 may be wound without being adhered to the film folding body 4, or the liquid intake surface 5 of the film folding body 4 and the end portion of the winding body 7 may be fused to each other. , May be adhered to the film folding body 4.

The material of the winding body 7 is not particularly limited, and may be a resin film, a metal formed into a tubular shape, a string, paper, or the like, but from the viewpoint of facilitating production, a resin film is preferable. ..

In particular, when trying to increase the size of the water injection surface 5 of the resin structure 22 in the plane direction, the shape retention of the resin structure 22 is maintained by increasing the strength of the resin structure 22 by the winding body 7. Etc. can be further enhanced.

The film filling rate of the resin structure having the wound body is a value obtained without including the volume of the resin film constituting the wound body.

(Manufacturing method of resin structure)
The resin structure 22 having the winding body 7 can be manufactured by winding the outer periphery of the resin structure with the winding body 7 after producing the resin structure in the same manner as in the first embodiment.

[Third Embodiment]
(Resin structure)
FIG. 9 is a schematic view showing a resin structure according to a third embodiment. As shown in FIG. 9, the resin structure 23 according to the present embodiment includes a plurality of film folding bodies 4 in which a resin film is folded in one direction, and a winding body 7 for winding the plurality of film folding bodies 4. 'And have. The structure of the film folding body 4 is the same as that of the first embodiment. Other parts that overlap with the first embodiment or the second embodiment will not be described.

The winding body 7'is made of a resin film of the same type as the resin film constituting the film folding body 4. The winding body 7'is a resin film that extends continuously from the end portion of the resin film constituting the film folding body 4, and is formed by winding the outer periphery of the film folding body 4. The winding body 7'may be wound separately from the film folding body 4, or the liquid intake surface 5 of the film folding body 4 and the end portion of the winding body 7'are fused. It may be adhered to the film folding body 4.

In FIG. 9, the film folding body 4 and the winding body 7'are formed from one resin film, and the resin structure 23 is formed from one resin film. As in the second embodiment, the resin structure 23 may be formed by using a plurality of film folding bodies 4. At this time, the resin film extending continuously from the end of the resin film constituting one of the plurality of film folding bodies 4 is wound around the outer periphery of the plurality of film folding bodies 4. It may be a round body 7'.

Further, although the folded resin films are arranged in a spiral shape in FIG. 9, the resin films may be more closely entangled and the arrangement of the resin films may not be discernible from the outside.

(Manufacturing method of resin structure)
Similar to the first embodiment, the resin structure 23 cuts the resin film in one direction (first step) and the folded resin film in a direction orthogonal to the folded direction. Step (second step) and the step of adhering the ends of the resin film in the direction orthogonal to the folded direction in the same resin film in the cross section generated by the cutting (third step). ), And can be manufactured by the method having.

10 and 11 are schematic views showing how the resin film is folded in the first step in the present embodiment. First, as shown in FIG. 10A, the resin film 14 is pulled out by a predetermined length from the film raw fabric 10 in which the resin film is wound in a roll shape, and the drawn resin film 14 is pulled out in the MD direction (in the figure). Fold it in the α direction) from the end. For example, the resin film 14 having a length of 1 m before folding is folded so that the length is about 10 cm.

After that, as shown in FIGS. 10 (b) and 10 (c), the folded resin film is wound in the MD direction. Then, by cutting the resin film at the unfolded portion, as shown in FIG. 11A, the unfolded resin film 14 extends continuously from the end portion of the film foldable precursor 4 'Is obtained.

Next, by winding the unfolded resin film 14 around the film-folded precursor 4', a bundle-shaped resin structure precursor 23'as shown in FIG. 11B can be obtained. When the resin structure 23 having the plurality of film folds 4 is manufactured, the plurality of film folds 4 may be wound around the unfolded resin film 14 at this time. At this time, since the resin film 14 adheres to the film folding precursor 4'due to its self-adhesive force and does not peel off, the predetermined diameter of the resin structure precursor 23'can be maintained even without a binding member or the like. it can.

After that, by performing the second step and the third step in the same manner as in the first embodiment, the resin structure 23 having the liquid intake surface 5 at the end can be manufactured.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the scope of the present invention is not limited to the description of Examples.

[Example 1]
1. 1. Preparation of resin structure 1-1. Resin structure 1 (see first embodiment)
A raw film wrapped with a commercially available resin film made of a resin composition containing a PVDC resin was prepared. The width of the resin film was 30 cm and the thickness was 10.5 μm.

A resin film is drawn out from the original film to be narrowed, and a tubular metal ring having an inner diameter of 15 mm and a length of 14 mm is passed through the opening to form a string. It was cut to the length of (see Fig. 2). Ten string-shaped resin films (film-folded precursors) folded in this way were bundled and filled in a vinyl chloride pipe having an inner diameter of 3 cm (see FIG. 2).

After that, the bundled 10 string-shaped resin films are drawn out 1.5 cm from the end of the tube, and the tube is moved in the B direction in FIG. 5 while blowing air using the heating cutter shown in FIG. 4, and heated. The bundled 10 string-shaped resin films were cut at the same time by the cut lines. Air was blown from the blower at a wind speed of 7 m / s. The moving speed of the tube with respect to the cutting line was 0.6 cm per second.

As a result, a columnar resin structure 1 having a diameter of 3.0 cm and a height of 1.5 cm, in which one end was fused, was obtained. The film filling rate of the resin structure 1 obtained by dividing the volume of the resin film used by the volume of the resin structure 1 was 4.5 vol%.

1-2. Resin structure 2 (see second embodiment)
The outer circumference of the resin structure produced in the same manner as the resin structure 1 was wound around the same resin film to obtain the resin structure 2. The film filling rate of the resin structure 2 obtained by dividing the volume of the resin film used (excluding the resin film used for winding) by the volume of the resin structure 2 was 4.5 vol%.

1-3. Resin structure 3 (see third embodiment)
A resin film having a length of 300 cm was pulled out from the raw film, and the drawn resin film was folded from the end in the MD direction. The folded resin film was wound in the MD direction, and the unfolded resin film was pulled out and cut to a length of 30 cm from the folded portion. Then, the folded resin film was wound into a circle having a diameter of 3 cm, and the outer circumference thereof was further wound with the unfolded resin film to fill the inside of a vinyl chloride pipe having an inner diameter of 3 cm.

Then, it was cut in the same manner as the resin structure 1 to obtain a columnar resin structure 3 having a diameter of 3.0 cm and a height of 1.5 cm. The film filling rate of the resin structure 3 obtained by dividing the volume of the resin film used by the volume of the resin structure 3 was 4.5 vol%.

1-4. Comparative oil collecting material Ten commercially available resin films made of a resin composition containing PVDC resin were stacked, and a crusher (Horai crusher UO-360F, mesh diameter φ7.5 mm) was used to determine the crushing rotation speed. It was set to 645 rpm and pulverized. Weigh 20 ± 0.5 g of the crushed product of the obtained wrap film, and weigh 20 ± 0.5 g, and it is a bag-shaped body with an opening at one end. "Dustman combined use" (size: width 100 mm, length 215 mm, material: polyester) The opening was focused and tied. As a result, a comparative oil collecting material was obtained.

2. Measurement of oil collection amount 2-1. Measurement of Oil Collection Amount of Resin Structures 1 to Resin Structures 3 The weights of the obtained resin structures 1 to 3 were measured.

Then, the resin structures 1 to 3 were immersed in salad oil (edible blended oil manufactured by Nisshin Oillio Group Co., Ltd.) so that the whole was completely submerged. After 24 hours, the resin structures 1 to 3 were taken out, left to stand on a wire mesh for 0.5 hours to drain oil, and then the weights of the resin structures 1 to 3 were measured.

All of these were performed in an environment of 23 ° C.

By subtracting each of the weights of the resin structures 1 to 3 before being immersed in the salad oil from the weights of the resin structures 1 to 3 after the oil draining, the resin structures 1 to 1 The amount of oil collected for each weight of the resin structure 3 was determined. Further, the calculated weight of the resin structures 1 to 3 obtained by multiplying the oil collection amount by the volume of the resin film using the resin structures 1 to 3 and the density of the resin film. By dividing by, the amount of oil collected per 1 g of the resin film of each of the resin structures 1 to 3 was obtained.

2-2. Measurement of Oil Collection Amount of Comparative Oil Collection Material The comparative oil collection material was submerged in 200 mL of salad oil filled in a beaker and left to stand for 30 minutes. Similarly, "Dustman combined use" containing no synthetic resin powder was immersed in 200 mL of salad oil filled in a beaker and left for 30 minutes. After that, the comparative oil collecting material was withdrawn from the salad oil and left in a suspended state for 30 minutes, and then the rotating surface became perpendicular to the ground for 1 minute at 120 rpm using a three-one motor BLh-600 manufactured by Shinto Kagaku Co., Ltd. The oil was drained by rotating it in this way. Similarly, the "dustman combined use" containing no synthetic resin powder was withdrawn from the salad oil, left in a suspended state, and then oil-drained.

Obtain the weight of the comparative oil collecting material after oil draining and the "dustman combined use" that does not contain the powdered synthetic resin, and subtract the weight of the latter from the weight of the former to obtain the comparative oil collecting material. The weight of the collected oil was calculated. The weight of the oil collected by the comparative oil collecting material was divided by the weight of the first weighed synthetic resin powder to obtain the amount of oil collected per 1 g of the synthetic resin powder.

Table 1 shows the presence / absence of a wound body, the diameter and height of the columnar shape, the resin film filling rate, and the amount of oil collected per 1 g of the resin film for the resin structures 1 to 3 (Table 1). Then, it is simply expressed as "oil collection amount").

The oil collection amount of the comparative oil collection material is 0.4 g / g. As shown in Table 1, all of the resin structures 1 to 3 had a higher oil collection amount than the comparative oil collection material.

[Example 2]
Resin structures 4 to 23 were produced in the same manner as the resin structure 3. At this time, the length of the resin film pulled out and folded and the length of the resin film not folded for winding are changed to change the diameter of the columnar shape (6 cm or 3 cm) and the filling rate of the resin film. It was changed for each resin structure.

At this time, an attempt was made to produce a resin structure having a film filling rate of 1.1 vol%, but the amount of the resin film was too small to produce the resin structure.

For the resin structures 4 to 23, the amount of oil collected was determined in the same manner as in Example 1. Further, the density of the salad oil (0.91 g / cm) using the value obtained by subtracting the weight of the resin structure before immersion in the salad oil from the weight of the resin structure after the oil draining (weight of the collected oil). oil volume trapped by dividing by ³⁾ (unit: sought cm ^3).

^{The total volume of voids (unit: cm 3} ) was obtained by subtracting the volume of the resin film used for producing the resin structure from the volume of the resin structure. The volume of collected oil was divided by the total volume of the voids to obtain the oil collection efficiency for each resin structure.

Tables 2 and 3 show the diameter and height of the columnar shape, the resin film filling rate, and the amount of oil collected per 1 g of the resin film for the resin structures 4 to 23 (in Tables 2 and 3). It is simply referred to as "oil collection amount"), the volume of collected oil, the total volume of voids, and the oil collection efficiency.

As shown in Tables 2 and 3, the larger the film filling rate, the higher the oil collection efficiency of the resin structure. When the film filling rate was set to 22.3 vol%, the size of the opening on the liquid intake surface was probably too small, and the oil could not sufficiently penetrate into the resin structure from the liquid intake surface, so that the oil was trapped. The collection efficiency has decreased.

[Example 3]
Similar to the resin structure 1, a columnar resin structure 24 having a diameter of 8.0 cm and a height of 2.0 cm was obtained. The film filling rate of the resin structure 24 obtained by dividing the volume of the resin film used by the volume of the resin structure 24 was 4.5 vol%.

Similar to the resin structure 2, a columnar resin structure 25 having a diameter of 8.0 cm and a height of 2.0 cm was obtained. The film filling rate of the resin structure 25 obtained by dividing the volume of the resin film used by the volume of the resin structure 25 was 4.5 vol%.

The resin structure 24 and the resin structure 25 were put into a hexagonal rotary machine and rotated at room temperature at a rotation speed of 30 rpm for 30 minutes.

FIG. 12 shows photographs of the resin structure 24 and the resin structure 25 before and after rotation. Sample 1'in FIG. 12 (a) is a photograph of the resin structure 24 before rotation, and sample 2'in FIG. 12 (a) is a photograph of the resin structure 25 before rotation. Sample 1'in FIG. 12B is a photograph of the resin structure 24 after rotation, and sample 2'in FIG. 12B is a photograph of the resin structure 25 after rotation.

The resin structure 25 whose outer circumference is wound with a wound body has less fraying after rotation than the resin structure 24 having no wound body, has high durability, and is excellent in shape retention.

[Example 4]
A columnar resin structure having a diameter of 3.0 cm was obtained in the same manner as in the resin structure 1. At this time, the film filling rate is 3.6 vol% by changing the number of string-shaped resin films (film-folded precursors) used for producing the resin structure and the length of the resin film drawn out from the tube at the time of cutting. Alternatively, resin structures 26 to 31 having a height of 4.5 vol% and a height of 1.5 cm, 1.0 cm or 0.5 cm were obtained.

Further, seven resin structures 26 to 31 were assembled in a flower shape and bundled (see FIG. 6) to obtain resin structures 32 to 37.

The oil collection amount and the oil collection efficiency per 1 g of the resin film of the resin structures 26 to 37 were determined in the same manner as in Examples 1 and 2.

Tables 4 and 5 show the diameter and height of the columnar shape, the resin film filling rate, and the amount of oil collected per 1 g of the resin film for the resin structures 26 to 37 (in Tables 4 and 5). It is simply expressed as "oil collection amount"), and also indicates the oil collection efficiency.

As is clear from Tables 4 and 5, when the height (thickness) is 0.3 cm or more and 1.2 cm or less, both the oil collection amount per 1 g of the resin film and the oil collection efficiency are high. Was there.

Further, as is clear from Table 5, even if a plurality of resin structures were assembled to increase the size, the oil collection amount per 1 g of the resin film and the oil collection efficiency were both high.

[Example 5]
A columnar resin structure having a diameter of 3.0 cm was obtained in the same manner as in the resin structure 1. At this time, the film filling rate is 3.1 vol% by changing the number of string-shaped resin films (film-folded precursors) used for producing the resin structure and the length of the resin film drawn out from the tube at the time of cutting. Eight resin structures having a height of 3.6 vol%, 4.0 vol%, or 4.5 vol% and a height of 0.5 cm or 1.5 cm, and a film filling rate of 3.1 vol%, 3. Four resin structures having 3 vol%, 4.0 vol%, 4.5 vol% and a height of 1.5 cm, and a film filling rate of 4.5 vol and a height of 0.3 cm. , 3.0 cm, or 6.0 cm, and three resin structures were made.

Seven of these resin structures were assembled into a flower shape and bundled (see FIG. 6) for use in the experiment.

For these 15 resin structures, the amount of oil collected per 1 g of the resin film was determined in the same manner as in Example 1.

FIG. 13 is a graph in which the relationship between the film filling rate obtained in this example and the amount of oil collected per 1 g of the resin film is plotted, and each plot is connected for each height of the resin structure. The film filling rate shown in FIG. 13 is the film filling rate per cylindrical resin structure having a diameter of 3.0 cm.

As is clear from FIG. 13, the film filling rate and the amount of oil collected per 1 g of the resin film have the same relationship at any height, and in particular, the height (thickness) is 0.5 cm or more. When it was 2 cm or less, the amount of oil collected per 1 g of the resin film was high.

[Example 6]
The resin structure 1 and the resin structure 3 produced in Example 1, and the comparative resin structure 1 in which the resin film is cut with a cutter knife that is not heated during the production of the resin structure 1, and the resin structure 3 are heated during production. For the comparative resin structure 2 in which the resin film was cut with a utility knife, the surface hardness (shape holding force at the time of pressurization) of the liquid intake surface was measured.

FIG. 14 is a diagram showing a situation in which the shape holding force is measured using a measuring device. As shown in FIG. 14, the measuring device 30 which is a texture analyzer drives the table portion 32 on which the sample (resin structure or comparative resin structure) is placed, the measuring rod-shaped tool 34, and the measuring rod-shaped tool 34 up and down. It includes a drive unit (not shown) and a spherical portion 36 attached to the lower end of the measuring rod-shaped tool 34. The spherical portion 36 weighed 5 g.

As shown in FIG. 14, a columnar holder 40 is placed directly under the spherical portion 36 of the table portion 32, and a sample is placed on the holder 40 so that the liquid intake surface faces the holder 40 and the spherical portion 36. It was placed like this. Next, the spherical portion 36 was lowered at a speed of 1.7 mm / min, and the spherical portion 36 was pushed into the liquid intake surface of the sample by 5 mm.

The maximum surface hardness of the resin structure 1 measured at this time was about 170 g, and the maximum surface hardness of the resin structure 3 was about 250 g. The measured maximum surface hardness of the comparative resin structure 1 was about 70 g, and the maximum surface hardness of the comparative resin structure 2 was about 130 g.

Further, in the resin structure 1 and the resin structure 3, the resin film did not come off when the spherical portion 36 was pushed in, but the comparative resin structure 1 and the comparative resin structure 2 pushed in the spherical portion 36. Occasionally, the resin film came off.

From these results, by adhering (fusing) the ends of the resin film to each other to form a liquid intake surface, the resin structure has sufficient strength even in a thin shape (height 1.5 cm). It was found that it has a high shape retention force.

[Example 7]
Similar to the resin structure 2, a columnar resin structure 38 having a diameter of 6.0 cm and a height of 1.5 cm was obtained. Air was blown from the blower at a wind speed of 12 m / s. The moving speed of the tube with respect to the cutting line was 0.3 cm per second. The film filling rate of the resin structure 38 obtained by dividing the volume of the resin film used by the volume of the resin structure 38 was 4.5 vol%.

A columnar resin structure 39 having a diameter of 6.0 cm, a height of 1.5 cm, and a film filling rate of 4.5 vol% was formed in the same manner as the resin structure 38 except that the air velocity of the air blown from the blower was set to 7 m. Obtained.

A columnar resin structure 40 having a diameter of 6.0 cm, a height of 1.5 cm, and a film filling rate of 4.5 vol% was obtained in the same manner as the resin structure 38 except that air was not blown from the blower portion.

A columnar resin structure having a diameter of 6.0 cm, a height of 1.5 cm, and a film filling rate of 4.5 vol%, similar to the resin structure 38, except that the moving speed of the pipe with respect to the cutting line was set to 0.6 cm per second. I got 41.

Similar to the resin structure 38, the diameter is 6.0 cm, the height is 1.5 cm, and the film is filled, except that the moving speed of the pipe with respect to the cutting line is 0.6 cm per second and the air velocity of the air blown from the blower is 7 m. A columnar resin structure 42 having a ratio of 4.5 vol% was obtained.

The moving speed of the pipe with respect to the cutting line was 0.6 cm per second, and the diameter was 6.0 cm, the height was 1.5 cm, and the film filling rate was 4.5 vol. % Columnar resin structure 43 was obtained.

Table 6 shows the diameter and height of the columnar shape, the resin film filling rate, and the amount of oil collected per 1 g of the resin film for the resin structures 38 to 43 (in Table 6, simply "oil collection amount". ”), As well as the efficiency of oil collection.

As is clear from Table 6, when the resin film was blown during cutting by the heated cutting line, both the oil collection amount and the oil collection efficiency per 1 g of the resin film were high. It is considered that this is because a sufficient size and number of openings are formed on the liquid intake surface, which makes it easier for the liquid to enter the voids.

This application is an application claiming priority based on Japanese application No. 2017-20194 filed on October 16, 2017, and the contents described in the specification, claims and drawings of the application are the present. Incorporated in the application.

Since the resin structure of the present invention has higher oil collection efficiency and can be made into various shapes, it can be used for a wide range of applications in which oil collection is required.

2, 22, 23, 200 Resin structure 2', 23' Resin structure precursor 4 Film folding body 4'Film folding body precursor 4a Wall 5 Liquid intake surface 6 Tube 7 Winding body 7'Winding body 8 Heating cutter 10 Film raw fabric 12 Ring 12a Opening 13 Temperature control part 14 Resin film 15 Table 16 Resin film formed into a string 18 Cutting line 19 Blower 30 Measuring device 32 Table part 34 Measuring rod-shaped tool 36 Spherical part 40 Holder 70 Grease trap 71 1st tank 72 2nd tank 73 3rd tank 74 Input port 75 Basket 76 Trap pipe 77 Oil layer 78 Water layer

Claims (15)

A resin structure including a film folding body in which a resin film is folded in one direction.
The film folding body has a liquid intake surface formed by partially adhering the ends of the folded resin film in a direction orthogonal to the folding direction.
The resin structure, when brought into contact with a liquid comprising oil to the liquid capture surface, the liquid is entering the inside of the resin structure, and collecting the oil,
It has a winding body around which a plurality of the film folding bodies are wound around the outer peripheral portion of the resin structure.
Resin structure. The film folding body has a plurality of voids that are open to the liquid intake surface and have the resin film as a side wall.
The resin structure according to claim 1. The resin structure according to claim 2 , wherein the film folding body allows the liquid to enter the gap from the liquid intake surface and restricts the liquid from entering the gap from the side wall. The resin structure according to any one of claims 1 to 3, wherein the wound body is made of a resin film. The resin structure according to claim 4 , wherein the wound body is a resin film that extends continuously from an end portion of the resin film constituting the film folding body. The resin structure according to any one of claims 1 to 5 , wherein the edges of the folded resin film are bonded by heat fusion. The resin structure according to any one of claims 1 to 6 , wherein the space filling rate of the resin structure is more than 1.7 vol% and 22.3 vol% or less. The resin structure according to any one of claims 1 to 7 , wherein the folded resin film is a film made of a resin composition having lipophilic hydrophobicity. The resin structure according to claim 8 , wherein the folded resin film is a film made of a resin composition containing polyvinylidene chloride resin. The resin structure according to any one of claims 1 to 9 , wherein the folded resin film is a film having a thickness of 5 μm or more and 40 μm or less. The resin structure according to any one of claims 1 to 10 , which is an oil collector. The resin structure according to any one of claims 1 to 10 , which is an oil-water separation membrane. The process of folding the resin film in one direction and
A step of cutting the folded resin film in a direction orthogonal to the folded direction, and
The cross section generated by the cutting includes a step of adhering the ends of the resin film in a direction orthogonal to the folded direction in the same resin film.
A method for manufacturing a resin structure. It has a step of assembling the folded resin film, and has a step of assembling.
The cutting step is a step of cutting the assembled resin film at the same time.
The bonding step is a step of bonding the ends of the assembled resin film in a direction orthogonal to the folded direction between the plurality of film folded bodies.
The method for producing a resin structure according to claim 13. The cutting step and the bonding step are steps of cutting the resin film with a heating cutter and at the same time heat-welding the ends to each other.
At the same time as the cutting and heat welding, air is blown to the resin film from the end side in the direction orthogonal to the folded direction of the resin film.
The method for producing a resin structure according to claim 13 or 14.

Images