EP1403406B1 - Netzwerkstruktur aus Papiergarn - Google Patents

Netzwerkstruktur aus Papiergarn Download PDF

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Publication number
EP1403406B1
EP1403406B1 EP20030021491 EP03021491A EP1403406B1 EP 1403406 B1 EP1403406 B1 EP 1403406B1 EP 20030021491 EP20030021491 EP 20030021491 EP 03021491 A EP03021491 A EP 03021491A EP 1403406 B1 EP1403406 B1 EP 1403406B1
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EP
European Patent Office
Prior art keywords
paper
net
reticulated structure
string
paper string
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP20030021491
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English (en)
French (fr)
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EP1403406A1 (de
Inventor
Motoshi Okugawa
Toshiaki Yano
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Tomoegawa Co Ltd
Original Assignee
Tomoegawa Paper Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2002280667A external-priority patent/JP3749511B2/ja
Priority claimed from JP2002343193A external-priority patent/JP2004173886A/ja
Priority claimed from JP2002343186A external-priority patent/JP2004173568A/ja
Priority claimed from JP2002354676A external-priority patent/JP2004183417A/ja
Application filed by Tomoegawa Paper Co Ltd filed Critical Tomoegawa Paper Co Ltd
Publication of EP1403406A1 publication Critical patent/EP1403406A1/de
Application granted granted Critical
Publication of EP1403406B1 publication Critical patent/EP1403406B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • D02G3/08—Paper yarns or threads
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
    • Y10T442/102—Woven scrim
    • Y10T442/155—Including a paper layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
    • Y10T442/184—Nonwoven scrim

Definitions

  • the present invention relates to a paper string reticulated structure according to the preamble of claim 1, and in particular, relates to a paper string reticulated structure which is applied to a vegetation sheet efficiently used for transplantation, land formation, mountain surfaces, or revetment; an agricultural net efficiently used for birdproof nets, insectproof nets, weedproof nets, windbreak nets, shading nets, or animalproof nets; a construction net arranged on outer planes of temporary structures such as scaffolding at construction sites; or an article container such as a cloth basket, a vegetable storage basket, or a shopping bag.
  • cords or strings made of natural fibers such as hemp or straw, or made of synthetic fiber such as polyethylene, nylon, or polyester, are used as a raw material for reticulated objects.
  • natural fibers such as hemp or straw are combustible and easily decomposed in the soil, although the produced amount of raw material is low these days.
  • synthetic fibers harmful gas may be generated if it is burned, and it cannot be decomposed in the soil.
  • metallic wire gauze As a conventional vegetation reticulated body, metallic wire gauze is well known. Furthermore, a reticulated body in which the string objects comprising double layer water absorbing acrylic resin is used in at least a part of the warp and/or woof obtained by single or mix spinning of synthetic resin such as polyethylene, polypropylene, nylon, polyester, or acryl; cotton; hemp; palm resin; and animal fiber is disclosed in Japanese Unexamined Patent Application Publication No. 21087/2002.
  • synthetic resin such as polyethylene, polypropylene, nylon, polyester, or acryl
  • cotton hemp
  • palm resin and animal fiber
  • metallic wire gauze is bulky when it is collected, and harmful gas may be generated when synthetic resin is burned. Furthermore, they are difficult to decomposed in the soil.
  • a vegetation sheet in which soft reinforcement consisting of a decomposition component and film forming component adheres on an upper surface of the sheet object knitted by decomposable fibers comprising plant material such as straw, hemp, or palm is suggested in Japanese Unexamined Patent Application Publication No. 153118/2002.
  • the adhering process of the soft reinforcement is complicated and the cost is high.
  • germinating and growing of plants may be impeded since the area of the opening part of the mesh is difficult to control.
  • a vegetation reticulated body composed of a material in which antibacterial treatment is performed on a reticulated object comprising a plastic fiber such as nylon to be reformed into decomposable is disclosed in Japanese Unexamined Patent Application Publication No. 185062/94(Hei 6).
  • harmful gas may be generated when it is burned since plastic fiber is used in the reticulated body, and it is difficult to decompose in the soil.
  • water absorptivity and water retentivity which are required for vegetation is not sufficient.
  • a reticulated object composed of cords or strings of natural fiber or synthetic fiber is used in the conventional agricultural net.
  • the natural fiber is combustible and is easily decomposed in the soil, although the amount of the raw material produced is low recently.
  • harmful gas may be generated if it is burned, and it cannot be decomposed in the soil.
  • biodegradable net which is formed with lactone resin alone or with biodegradable resin comprising lactone resin and other biodegradable resin is disclosed in Japanese Unexamined Patent Application Publication No. 275987/99(Hei 11); however, it is expensive since the lactone resin, which is one type of special resin, is used.
  • a composite paper which is prepared by mixing biodegradable thermoplastic synthetic short fibers and vegetable fibers for paper at specific ratios, or which is prepared by forming a biodegradable thermoplastic synthetic short fiber layer on one side of a layer not including biodegradable thermoplastic synthetic short fibers in Japanese Unexamined Patent Application Publication No.
  • either the warps or woofs are formed into flat yarn to form a lattice mesh, and the warps and woofs are composed of polylactic acid containing starch as a raw material.
  • These agricultural nets are hygroscopic and expensive since polylactic acid containing starch as a raw material is used.
  • Disposable plastic bags are widely used at supermarkets or the like. However, in the case in which a customer prepares his/her own shopping bag, a service corresponding to saving of plastic bags can be given from the viewpoints of saving resources and reducing trash.
  • a cloth basket or the like a basket formed with bamboo or natural creeper, or a basket formed into mesh structure using vinyl chloride resin or the like is widely used.
  • a refrigerator can be used, although vegetables are stored in a plastic bag alone or stored in a plastic bag in a basket.
  • a basket or a bag having characteristics as follows is required in recent years: the appearance is stylish for shopping, storage of vegetables or cloths; it can be comfortably used; it can be folded if necessary; it is combustible when disposed; it can be naturally decomposed in the soil.
  • a shopping basket which can be carried easily, can be kept box-shape in the case of construction is disclosed in Japanese Unexamined Patent Application Publication No. 300913/2002, although the raw material is not identified in particular.
  • a shopping bag which is light and compact to carry, and which can be carried on a person's back is disclosed in Japanese Unexamined Patent Application Publication No. 87415/2002. This shopping bag is formed with net yarn knitted with cotton or synthetic fiber.
  • a basket which is knitted with natural bamboo or creeper, a basket which is knitted with silk gut shaped string of vinyl resin or the like, and a basket in which gaps similar to mesh are formed by forming machine are well known.
  • a basket in which plural baskets are combined is also suggested.
  • a basket in which raw material and structure of mesh are devised has not been disclosed yet.
  • the basket composed of bamboo or creeper is expensive, so a substitute of synthetic fiber, plastic gut, or bulk molded product is used in the present situation. These plastic products cannot be decomposed in the soil and harmful gas may be generated by burning.
  • biodegradable sheets are suggested in recent years.
  • a sheet which is arranged on outer planes of temporary structures at construction sites is disclosed in Japanese Unexamined Patent Application Publication No. 182052/99(Hei 11).
  • the mesh part which accounts for most of the mesh sheet and a margin to sew up are composed of vegetable fibers, so dioxin is not generated if it is burned, and it can be decomposed by bacteria in the soil.
  • Japanese Unexamined Patent Application Publication No. 80799/2000 a construction mesh sheet in which acrylic resin is coated on the surface of polyolefin mesh fabric is disclosed. This construction mesh sheet is strong, and harmful gas is not generated if it is burned, and cold resistance and antifouling property are satisfactory.
  • Japanese Unexamined Patent Application Publication No. 303387/2001 a biodegradable construction sheet in which biodegradable polymer compound is added to one surface of polylactic acid fiber fabric is disclosed.
  • Japanese Unexamined Patent Application Publication No. 303388/2001 a biodegradable construction sheet composed of polylactic acid fiber fabric in which part of the polylactic acid fiber is fire resistant polylactic fiber is disclosed.
  • a construction sheet knitted with biodegradable polyester resin composed of two kinds of polyester resin whose difference in melting point is not less than 10°C is disclosed.
  • Japanese Unexamined Patent Application Publication No. 275761/2002 a construction mesh sheet in which water-based acrylic denatured polyester base polyurethane resin is coated on a mesh sheet using synthetic fiber filament yarn is disclosed.
  • the disclosed sheets are not biodegradable or are a combination of polylactic acid fiber fabric and biodegradable polymer compound.
  • a part of polylactic acid fiber is processed to be fireproofing, or polyester fiber or the like is contained. Producing cost of these sheets is very high.
  • Japanese Unexamined Patent Application Publication No. 10-001166 discloses a paper string reticulated structure according to the preamble of claim 1 including a paper cushion material produced by knitting twisted paper strings so as to form a net.
  • the paper strings are made from base papers having the ratio of soft wood kraft pulp of 0 or 25% (Examples 1 and 2).
  • the aspect ratio of tensile strength that is, the ratio of tensile strength of a longitudinal direction (machine direction) (MD) to tensile strength of a cross direction (CD) is 1.5 to 2.5 when it was made by a fourdrinier paper machine and the ratio of MD and CD is 3.0 to 4.0 when it was made by a cylinder paper machine.
  • the present invention is completed in consideration of the situation described above, and an object of the present invention is to provide a paper string reticulated structure having characteristics as follows: harmful gas is not generated if burned; sufficient assimilation in the soil is exhibited if buried; it is widely applicable to various uses by controlling thickness of paper strings or size of mesh; water absorptivity, water retentivity, and mechanical strength can be increased if necessary; and the cost is low.
  • the present invention is completed as a result of research to solve the problems described above by the features of claim 1.
  • a first aspect of the invention is a paper string reticulated structure comprising a paper string made from a base paper, in which at least 70% of raw material of the base paper is soft wood kraft pulp and the aspect ratio of tensile strength of the base paper measured by Japanese Industrial Standard P 8113 is in a range from 5 to 15.
  • a second aspect of the invention is a paper string reticulated structure according to the first aspect, wherein the basic weight of the base paper is in a range from 20 to 80 g/m 2 .
  • a third aspect of the invention is a paper string reticulated structure according to the first or second aspect, wherein the base paper is prepared by a cylinder paper machine.
  • a fourth aspect of the invention is a paper string reticulated structure according to one of the aspects of first to third, wherein the paper string reticulated structure comprises knotless net.
  • a fifth aspect of the invention is a paper string reticulated structure according to one of the aspects first to fourth, wherein the base paper contains wet paper strength enhancing agent.
  • a sixth aspect of the invention is a paper string reticulated structure according to one of the aspects first to fifth, wherein the wet paper strength enhancing agent comprises at least one kind selected from polyamide epichlorohydrin resin, epoxy based resin, melamine based resin, urea based resin, dialdehyde starch, polyacrylamide, or polyethyleneimine.
  • a seventh aspect of the invention is a paper string reticulated structure according to the first aspect, wherein the paper string reticulated structure is for a vegetation net.
  • An eighth aspect of the invention is a paper string reticulated structure according to the first aspect, wherein the paper string reticulated structure is for an agricultural net.
  • a ninth aspect of the invention is a paper string reticulated structure according to the first aspect, wherein the paper string reticulated structure is for an article container.
  • a tenth aspect of the invention is a paper string reticulated structure according to the first aspect, wherein the paper string reticulated structure is for a construction net.
  • a base paper used in the present invention contains soft wood kraft pulp as a main raw material.
  • soft wood kraft pulp As the kraft pulp, ether bleached kraft pulp (NBKP) or unbleached kraft pulp (NUKP) can be used.
  • NNKP ether bleached kraft pulp
  • NUKP unbleached kraft pulp
  • Required tensile strength of the paper string of the present invention can be maintained by containing soft wood pulp at least not less than 70% of the entire raw material of pulp.
  • wood pulp such as hard wood pulp
  • non-wood pulp such as Manila hemp pulp, sisal pulp, flax pulp, or kenaf pulp
  • waste paper pulp as long as strength of the paper is not lost, can be added.
  • Beating process is performed on these pulps by a beater or the like to prepare raw material of base papers.
  • the degree of beating process is determined depending on the use the of paper string reticulated structure. In the case in which strong paper string is required, the beating process must be increased. In this case, the strength of the paper string can be increased as the contained ratio of Manila hemp pulp is increased.
  • wet paper strength enhancing agent kinds of filler, sizing agent, or yield improving agent can be added to the base paper of the present invention, if necessary.
  • wet paper strength enhancing agent is effective to prevent deterioration of strength (particularly by rain water) for a certain period.
  • the kind of wet paper strength enhancing agent is not limited in particular, at least one kind selected from polyamide epichlorohydrin resin, epoxy based resin, melamine based resin, urea based resin, dialdehyde starch, polyacrylamide, or polyethyleneimine can be desirably used in the present invention.
  • sizing agent such as rosin based, alkylketene dimer, alkenyl succinic acid anhydrate; or surface sizing agent such as kinds of synthetic polymer type can be used.
  • the yield improving agent is added to reduce loss of pulp and filler, to improve yield of paper.
  • organic polymer electrolyte such as polyacrylamide or inorganic salts such as aluminum sulfate can be applied to the base paper of the present invention.
  • the raw materials mentioned above are mixed to form a slurry of the paper material, and then the slurry is processed by a wet paper machine.
  • the wet paper machine for producing the base paper of the present invention is not particularly limited, and generally used paper machines such as a fourdrinier paper machine or a cylinder paper machine can be selected, although the cylinder paper machine is desirable to obtain tensile strength required for the paper string reticulated structure.
  • the basic weight of the base paper of the present invention is desirably in a range from 20 to 80 g/m 2 , and more desirably from 30 to 50 g/m 2 .
  • the basic weight is less than 20 g/m 2
  • the paper may be easily torn when twisted
  • the basic weight is more than 80 g/m 2
  • the rigidity is increased and the paper becomes difficult to twist.
  • a base paper of the present invention As a base paper of the present invention, a monolayer paper comprising 100% soft wood kraft pulp or comprising mixed paper of above-mentioned pulp components can be applied. Alternatively, a double or triple layer paper can be also applied.
  • the aspect ratio of tensile strength of the base paper of the present invention in an ordinary state measured by Japanese Industrial Standard P 8113 is desirably in a range from 5 to 15. In the case in which the aspect ratio of tensile strength is less than 5, the paper may be broken when the paper is slit from paper roll into a tape-shape during paper string producing processing. On the other hand, in the case in which the aspect ratio of tensile strength is more than 15, the paper may be torn along the longitudinal direction when the paper is slit into a tape-shape.
  • the base paper obtained in the process described above is slit to have a tape-shape having dimensions of width 5 to 50 mm and length about 500 m, then the tape is twisted by a yarn twisting machine to produce paper string.
  • the paper string of the present invention is desirably used one by one, although a string in which several strings are knitted or twisted can be used. Thickness of the string is not limited in particular, but it is desirable in a range from about 1 to 10 mm by the diameter from the viewpoint of handling.
  • the paper string mentioned above is processed to be a knotted net or knotless net by using a net machine of ordinary net producing technique.
  • a knotless net is desirable.
  • a knotless net is light and is not bulky since it has no knots and has plane connections. Therefore, workability of pasting paper in which seeds and fertilizer are attached is improved in the case of a vegetation net. Furthermore, appearance is good if the vegetation net is applied to a slope face since the mesh of the net is uniform. In the case of an agricultural net, especially when the net is used for nurture from sowing, paper or the like in which fertilizer is attached can be pasted, the workability is improved. In addition, the appearance of the agricultural net is also good. Furthermore, in the case of the vegetation net and agricultural net, assimilation by the soil is facilitated since the connection part of the knotless net is easily broken compared to that of the knotted net.
  • the paper string reticulated structure of the present invention is supplied as a knot net, it is desirable that the paper string be lubricated by adding oil beforehand.
  • a knotless net is desirable.
  • a knotless net is light and is not bulky since it has no knots and has plane connections, and it is easy to carry. Shopping can be done without wasting disposable shopping bags.
  • the shape of the shopping bag of the present invention can be changed depending on the amount of the article contained, and it is very useful. Furthermore, ordinary articles do not fall from the mesh of the bag if the mesh is sufficiently small. If necessary, a cloth can be spread on the inner surface of the bag to prevent small articles from falling through.
  • the paper string of the present invention is strengthened, or thickened in the case of twisted state. Furthermore, paper strength enhancing agent or water soluble resin such as soluble starch or polyvinylalcohol can be added or coated on the paper string.
  • the paper string reticulated structure of the present invention is applied to a construction net
  • the paper string is processed to be a knotted net or a knotless net by using a net machine using ordinary net producing techniques.
  • a mesh structure of the net plain weave, twill weave, imitation gauze weave, leno weave, or leno-fabric weave can be performed.
  • the mesh structure of the net is large, and porosity which indicates mesh opening is desirably in a range of from 10 to 60%, and the weight per square meter of the mesh sheet is desirably in a range of from 60 to 600 g/m 2 .
  • the paper string reticulated structure of the present invention is advantageous from the viewpoint of ecology and the environment. Furthermore, a reticulated structure having various size openings can be freely produced by controlling thickness of warp, woof, or oblique strings of the reticulated structure, physical strength, or knitted space. Flowing amounts of air (including windbreaks), light penetration rate, and humidity can be controlled depending on the porosity of the mesh.
  • the paper string reticulated structure of the present invention is applied to a vegetation net
  • wet paper strength enhancing agent to the base paper
  • water resistance can be maintained even if the vegetation net is exposed to rain water for a long time.
  • rain water is stably kept in the net owing to the water absorptivity of wooden pulp used as a raw material of the base paper. Therefore, germinating and growing of plants can be promoted, and a slope face can be greened and strengthened.
  • the paper string reticulated structure of the present invention is applied to an agricultural net
  • herbicide or repellents of insects and animals can be impregnated to meet such requirements.
  • the net can be buried with weeds and stumps of vegetable at the site.
  • the net is decomposed in the soil after a certain period and harmful gas is not generated at all.
  • the present invention can supply an agricultural net which is superior in handling.
  • an article container such as soft shopping bag, hard shopping basket, cloth basket, or green vegetable basket can be made freely and easily by controlling the thickness of paper string, strength, and knitted space. Furthermore, coloring processes can also be performed easily since the raw material is wood pulp. Commercial value can be increased by adding designs.
  • the present invention can provide a construction net having appropriate porosity for each purpose by controlling the thickness of the paper string and the knitted space. Also in this case, coloring can be performed easily.
  • the construction net is strong, can be used repeatedly, and has a wide range of applications since the net is composed of special paper string as is shown in the Figures.
  • Figs. 1 to 7 Examples of the knotless net which can be applied to the paper string reticulated structure of the present invention are shown in Figs. 1 to 7. That is, Fig. 1 shows a lead-through type having a structure in which each yarn of two net yarns are mutually crossed and extend straight passing through the joint part of the net yarn, Fig. 2 shows a zigzag type having a structure in which each yarn of two net yarns are mutually crossed 2 to 3 times and the net yarn extends in a zigzag shape, Fig. 3 shows a hexagonal type having structure in which each yarn of two net yarns are mutually crossed 3 to 4 times and the net yarn extend straight via a joint part, Fig. 4 shows a Russell net having structure that is called "a lace net", Fig.
  • Fig. 5 is a gauze net (ordinary gauze net) having a structure in which woof crosses through a space of twisted warps to form a net
  • Fig. 6 is a gauze net (improved gauze net) having a structure in which the woofs mentioned above are twisted to reduce sliding of mesh
  • Fig. 7 is a fabric net having a structure in which yarns are simply crossed in fabric net.
  • the present invention has broad applicability by controlling the thickness of the paper string and size of the mesh.
  • the resin component can be coated or impregnated on the paper string reticulated structure to improve water resistance and physical strength.
  • impregnation or addition of the resin component can be performed in a process before the reticulated structure is formed, that is, at the steps of the paper string or the base paper.
  • the paper string reticulated structure mentioned above may be used to fix a vegetation mat on a slope face by itself, soil dressing which contains seeds or fertilizer is blown on the paper string reticulated structure which is provided on a slope face, seeds or fertilizer is directly attached to the reticulated structure beforehand, or paper or the like in which seeds or fertilizer is attached is provided on the reticulated structure. Furthermore, by providing the paper string reticulated structure of the present invention on soil or on the surface of fields for agriculture or gardening, germinating and growing of seeds can be promoted since the paper string absorbs rain water and swells, and the rain water is stably held in the paper string.
  • the agricultural net of the present invention can be provided by covering over crops with half cylinders. After the crops are harvested, the agricultural net is collected and buried in the soil of the predetermined place. In the case in which the net is used as a bird net at a fruit farm, the net can be expanded by props.
  • the net In the case in which agricultural net having herbicide impregnated beforehand is used, the net is provided at a part near the root of crops where weeds must be removed. In this case, herbicidal action is maintained as long as the structure of the agricultural net remains. After a certain term has passed, the net may be decomposed in the soil.
  • the net can be applied as a gardening net by expanding over vegetables or flowers.
  • a rectangle shape net which is formed from the reticulated structure shown in Figs. 1 to 7 is prepared as a body part 11, and as shown in Fig. 8, the lower edge of the rectangle is collected and joined by a natural fiber yarn such as a cotton to form the bottom part (collected part 13), opening part 14 in which an article is taken in and out is provided at the opposite upper edge of the rectangle by paper string or the like, and holding part 12 is composed of reticulated tape or cloth of natural fiber yarn shown in Figs. 1 to 7 by connecting with the opening part 14.
  • a rectangular reticulated structure shown in Figs. 1 to 7 is prepared as a body part 21, four edges are bent and raised to a certain height, to form bottom part 21a and side part 21b. If the flexibility of the mesh is not utilized, bending overlap parts 21c are required at four corners of the side part. As shown in Fig. 10, the bending part is formed by the bending overlap part 21c formed at the side part 21b and the corner of 21b.
  • An edge 21d of the opening part is required for taking in and out, it is desirable that the edge be nicely formed by knitting or joining with paper string.
  • a structure having vertical wrinkles on the side part that is, the structure in which stitches are thinly formed along the vertical direction and are wavy along cross direction can provide a basket having a soft texture.
  • the opening part when the side parts are bent, the opening part can be formed into a rectangle or circle as shown in Fig. 9, a wall in the longitudinal direction can be formed.
  • the opening part may be bound with natural fiber or may be joined with a degradable resin.
  • Combination junctions can be formed at the opening part by using paper string similar to the twisted string forming the reticulated structure.
  • cellulose-based such as acetic cellulose, or starch-based is desirably used since they are easily decomposed in the soil.
  • the present invention can provide article containers such as shopping bags (including baskets) having good texture since the article container is composed of a reticulated structure formed by the paper string shown in Figs. 1 to 7.
  • coloring process can also be performed easily to provide a shopping bag having a nice texture since the bag is a paper product.
  • the article container of the present invention is useful as a cloth basket or vegetable basket, and it is compact since it can be folded when not used. Furthermore, coloring process can also be performed easily to provide patterns since it is a paper production. In addition, harmful gas is not generated if it is burned, and it is easily decayed in the soil after a certain term has passed.
  • the paper string reticulated structure of the present invention can be applied to a construction net.
  • the construction net of the present invention includes a low dwelling net and a high dwelling net.
  • a low dwelling net is a construction net arranged on an outer plane of a temporary structure such as scaffolding at a construction site of a low dwelling. This net prevents a person, trash, dust, or small articles for construction from falling or scattering from the scaffolding, and includes a scattering preventing net.
  • a low dwelling is a building such as a wooden house or a light-weight steel house having a height of eaves of not more than 10 m.
  • a high-rise building net is a net which is used for high-rise building of reinforcing steel or steel frame structure. The high-rise building net differs from the low dwelling net, but the purpose and the function of the high-rise building net is similar to that of the low dwelling net.
  • red phosphorus based flame retarder, nitrogen based flame retarder, aluminum hydroxide, magnesium hydroxide, silica, calcium hydroxide or the like is added at the paper producing process.
  • they are impregnated after paper, string, or reticulated structure is formed.
  • the construction net of the present invention is used outside and exposed to sunlight for a long time, high weather resistance is required. Therefore, it is desirable that UV absorbent or light stabilizer, explained below, be added to the net.
  • these agents can be mixed with the pulp which is the raw material of the base paper, or they can be coated or impregnated on the surface of the base paper, or they can be impregnated to the twisted paper string or reticulated structure.
  • cyanoacrylate based UV absorbent such as 2-ethylhexyl-2-cyano-3,3'-diphenylacrylate, ethyl-2-cyano-3,3'-diphenylacrylate, or octyl-2-cyano-3,3'-diphenylacrylate
  • benzophenone based UV absorbent such as 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, or 2-hydroxy-4-octoxybenzophenone
  • benzotriazole based UV absorber such as 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, or 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole
  • benzoate based UV absorbent such as resorcinolmonobenzoate, 2,4-di-t-butylphenyl-3',5'-di-t-butyl-4'-hydroxybenzoate
  • hindered amine light stabilizer bis (2,2,6,6-tetramethyl-4-piperigil) sebacate, tetrakis (2,2,6,6-tetramethyl-4-piperidil)-1,2,3,4-butanetetracarboxylate, bis (1,2,2,6,6-pentamethyl-4-piperidil) ⁇ di(tridecyl)-1,2,3,4-butanetetracarboxylate, or condensate of 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperidinol and diethyl succinate can be used.
  • particles having a specific gravity of not less than 3 comprising metal or a compound of the metal is added to the base paper or the paper string as a sound proofing agent.
  • Sound which is generated at a construction site is generally of low frequency, and the sound disturbs the neighborhood. Therefore, a heavy net is desirable since the net can absorb the noise.
  • a metal or a compound of the metal having such a property titanium, iron, copper, zinc, silver, barium, zirconium, manganese, antimony, tungsten or oxides of these metals can be used in the present invention.
  • the construction net obtained as described above can be easily decomposed in the soil. In the case of disposal, harmful gas is not generated even if it is burned.
  • paper string reticulated structure of the present invention can also be applied to a wrapping material such as storage bag, a room interior material, a window blind, a desk lamp shade, a fishing net, or the like.
  • NUKP domestic soft wood unbleached kraft pulp
  • wet paper strength enhancing agent (trade name: polyfix301, produced by SHOWA HIGH POLYMER CO., LTD.) comprising polyamide epichlorohydrin resin was added into this water slurry, to account for 2% of the water slurry to prepare raw material for paper.
  • the raw material was processed into a base paper having a basic weight of 30 g/m 2 by a cylinder paper machine.
  • Tensile strength of this obtained basic paper was measured by the method according to Japanese Industrial Standard P 8113, the tensile strength is 8.6 kg/15 mm for longitudinal direction, 1.6 kg/15 mm for cross direction, and the aspect ratio is 5.4.
  • this base paper was slit into thin tape shapes having a width of 40 mm by bobbin winder, this tape was twisted 28 times/ 30 cm by a paper twisting machine to produce paper string having diameter of 3 mm.
  • the strength of this paper string was 15 kg measured by Japanese Industrial Standard Z 1518.
  • This paper string was processed by a commercial net machine to produce a knotless net of the lead-through type shown in Fig. 1.
  • an ordinary vegetation based material that is, a thin paper on which seeds, fertilizer, and soil improving agent were held by PVA adhesive, was attached to prepare a vegetation net.
  • This vegetation net is provided on a slope face of a hillside which is formed by road works, and is fixed by anchor pins.
  • roots of plants in the vegetation base material of the net extended and become fixed over several years, and the slope face will not be broken even if the ground was loosened artificially or naturally.
  • the paper string reticulated structure of the present invention was homogenized with the soil in few years and further helped the growth of plants.
  • This paper string was processed by a commercial net machine, to produce a knotless net of the lead-through type shown in Fig. 1 having low opening ratio.
  • Herbicide was impregnated into the obtained knotless net, and this net was provided to parts near the roots of crops where weeds were not desired.
  • herbicidal effect was maintained as long as the structure of the net was maintained, and after a certain period, the agricultural net was decomposed in the soil.
  • a bag having an opening part on an upper part of the structure was formed by the paper string mentioned above, and a holding part was provided to the bag, and thus the shopping bag of the present invention could be produced as shown in Fig. 8.
  • the paper string mentioned above was processed in a commercial net machine, to produce a biodegradable construction net having a structure of an ordinary gauze net shown in Fig. 5.
  • a narrow mesh structure can also be adopted.
  • base paper was prepared under the same conditions as in Example 1.
  • Tensile strength of this obtained basic paper was measured by the method according to Japanese Industrial Standard P 8113, the tensile strength was 11.8 kg/15 mm in the longitudinal direction, 2.1 kg/15 mm in the cross direction, and the aspect ratio was 5.6.
  • Example 2 In the same conditions as in Example 1, the paper string and the paper string reticulated structure were produced by using this base paper, and a vegetation net was also produced in a manner similar to that of Example 1.
  • This vegetation net was provided on a slope face of a hillside which is formed by road works, fixed by anchor pins. As a result, roots of plants in the vegetation base material of the net extended and became fixed over several years, and the slope face will not be broken even if the ground is loosened artificially or naturally.
  • the paper string reticulated structure of the present invention was homogenized with the soil in few years and further aided the growth of plants.
  • An agricultural net comprising the paper string reticulated structure of the present invention was produced using the base paper mentioned above in the same conditions as in Example 1.
  • the obtained agricultural net covered fields of Chinese cabbage to form half cylinders and was fixed by anchor pins.
  • the Chinese cabbage grew and was harvested without being eaten by harmful insects.
  • the net was disposed of at a certain place, and after a certain period, the agricultural net was decomposed in the soil.
  • Example 1 the base paper was processed to form the paper string and the paper string reticulated structure in the same conditions as in Example 1, and a shopping bag could be produced under the same conditions as in Example 1.
  • the paper string obtained under the same conditions as in Example 1 using the base paper mentioned above was processed to a commercial fabric machine, to produce a biodegradable construction net having a reticulated structure of a knotless net comprising the fabric net shown in Fig. 7.
  • a narrow mesh structure can also be adopted.
  • NUKP domestic soft wood unbleached kraft pulp
  • wet paper strength enhancing agent (trade name: polyfix301, produced by SHOWA HIGH POLYMER CO., LTD.) comprising polyamide epichlorohydrin resin was added into this water slurry, to account for 2.5% of the water slurry to prepare a raw material for paper.
  • the raw material was processed to a base paper having a basic weight of 41.5 g/m 2 by a cylinder paper machine.
  • Tensile strength of this obtained basic paper was measured by the method according to Japanese Industrial Standard P 8113, the tensile strength was 13.1 kg/15 mm in the longitudinal direction, 1.9 kg/15 mm in the cross direction, and the aspect ratio was 6.8.
  • Example 2 In the same conditions as in Example 1, the paper string and the paper string reticulated structure were produced by using this base paper, and a vegetation net was also produced in a manner similar to that of Example 1.
  • This vegetation net was provided on a slope face of a hillside which was formed by road works, fixed by anchor pins. As a result, roots of plants in the vegetation base material of the net extended and become fixed over several years, and the slope face will not be broken even if the ground is loosened artificially or naturally.
  • the paper string reticulated structure of the present invention was homogenized with the soil in few years and further aided the growth of plants.
  • the paper string was made by the base paper mentioned above under the same conditions as in Example 1, and an agricultural net having higher opening ratio than Example 1 was produced by the paper string.
  • the obtained agricultural net was expanded on the ceiling surface of a cultivation house of flowering plants, and appropriate heat retaining property, high permeability, and insectproofing property were exhibited and the flowering plants grew well. After harvesting the flowering plants, the agricultural net was disposed of and decomposed in the soil.
  • the base paper was processed to form the paper string and the paper string reticulated structure in the same conditions as in Example 1, and a cloth basket shown in Fig. 9 could be produced.
  • the paper string obtained under the same conditions as in Example 1 using the base paper mentioned above was processed to produce a biodegradable construction net having a structure shown in Fig. 1. In this case, spaces of mesh can be freely selected depending on use.
  • NUKP domestic soft wood unbleached kraft pulp
  • wet paper strength enhancing agent (trade name: polyfix301, produced by SHOWA HIGH POLYMER CO., LTD.) comprising polyamide epichlorohydrin resin was added into this water slurry, to account for 2.5% of the water slurry to prepare raw material for paper.
  • the raw material was processed to a base paper having a basic weight of 42 g/m 2 by a cylinder paper machine.
  • Tensile strength of this obtained basic paper was measured by the method according to Japanese Industrial Standard P 8113, the tensile strength was 13.1 kg/15 mm in the longitudinal direction, 1.9 kg/15 mm in the cross direction, and the aspect ratio was 6.8.
  • the paper string was made by the base paper mentioned above in the same conditions as in Example 1, and an agricultural net having lower opening ratio than Example 1 was produced by the paper string.
  • the obtained agricultural net is covered over the field of komatsuna (a kind of green vegetable) to form a half cylinder and, the net was used as an insectproof net.
  • the komatsuna was harvested and the weight and presence of harmful insects were measured. Sufficient insectproofing effect was confirmed and the komatsuna grew properly. After using the insectproof net, the net was disposed of and decomposed in the soil.
  • Tensile strength of this obtained basic paper was measured by the method according to Japanese Industrial Standard P 8113, the tensile strength was 5.1 kg/15 mm in the longitudinal direction, 1.7 kg/15 mm in the cross direction, and the aspect ratio was 3.0.
  • this base paper was slit into thin tapes having a width of 40 mm by a bobbin winder, this tape is twisted 28 times/ 30 cm by a paper twisting machine to produce a paper string having a diameter of 3 mm.
  • the paper was often torn, and it was difficult to form paper string.
  • it was also difficult to form a vegetation net, agricultural net, biodegradable construction net, and types of article container.
  • the construction net of the present invention obtained in Examples 1 to 3 and the net of Comparative Example 1 were used as low dwelling nets practically. In the case of the nets of Examples 1 to 3, no net broke during the entire construction period and sufficient strength was confirmed. However, in the case of the net of Comparative Example 1 in which soft wood pulp was not contained as a main component, the net was broken merely by the falling of a piece of wood. Furthermore, the nets of Examples 1 to 3 were buried after use and were monitored. After several years, the structure of these nets were not maintained any longer and they were dispersed in the soil.
  • a net which was produced by single vinylon spun yarn of yarn number count No. 20 (trade name: #CREMONA 300, produced by KURARAY CO., LTD.) was prepared, and the net was used to cover a field of komatsuna to form a half cylinder in the same conditions as in Example 4 for use as an insectproof net.
  • Example 4 Similar insectproofing effect was exhibited as in Example 4, although the net could not be decomposed in the soil, and the net remained in the field.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
  • Biological Depolymerization Polymers (AREA)

Claims (10)

  1. Netzartige Papierschnurstruktur, die eine Papierschnur umfasst, die aus einem Basispapier gefertigt ist, das Weichholz-Kraftzellstoff als Rohmaterial enthält, dadurch gekennzeichnet, dass wenigstens 70 % des Rohmaterials Weichholz-Kraftzellstoff ist und die Zugfestigkeitsstreckung des Basispapiers gemessen mittels der japanischen Industrienorm P8113 im Bereich von 5 bis 15 liegt.
  2. Netzartige Papierschnurstruktur nach Anspruch 1, wobei das Basisgericht des Basispapiers im Bereich von 20 bis 80 g/m2 liegt.
  3. Netzartige Papierschnurstruktur nach Anspruch 1 oder 2, wobei das Basispapier mittels einer Zylinderpapiermaschine gefertigt ist.
  4. Netzartige Papierschnurstruktur nach irgendeinem der Ansprüche 1 bis 3, wobei die netzartige Papierschnurstruktur ein knotenloses Netz umfasst.
  5. Netzartige Papierschnurstruktur nach irgendeinem der Ansprüche 1 bis 4, wobei das Basispapier ein Nasspapier-Festigkeitssteigerungsmittel enthält.
  6. Netzartige Papierschnurstruktur nach Anspruch 5, wobei das Nasspapier-Festigkeitssteigerungsmittel wenigstens eine Art umfasst, die ausgewählt ist aus Polyamid-Epichlorhydrin-Kunstharz, Kunstharz auf Epoxidbasis, Kunstharz auf Melaminbasis, Kunstharz auf Harnstoffbasis, Dialdehydstärke, Polyacrylamid oder Polyethylenimin.
  7. Netzartige Papierschnurstruktur nach Anspruch 1, wobei die netzartige Papierschnurstruktur für ein Vegetationsnetz verwendet wird.
  8. Netzartige Papierschnurstruktur nach Anspruch 1, wobei die netzartige Papierschnurstruktur für ein landwirtschaftliches Netz verwendet wird.
  9. Netzartige Papierschnurstruktur nach Anspruch 1, wobei die netzartige Papierschnurstruktur für einen Artikelbehälter verwendet wird.
  10. Netzartige Papierschnurstruktur nach Anspruch 1, wobei die netzartige Papierschnurstruktur für ein Konstruktionsnetz verwendet wird.
EP20030021491 2002-09-26 2003-09-23 Netzwerkstruktur aus Papiergarn Expired - Fee Related EP1403406B1 (de)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP2002280667A JP3749511B2 (ja) 2002-09-26 2002-09-26 紙ひも網状体及び植生用紙ひも網状体
JP2002280667 2002-09-26
JP2002343193A JP2004173886A (ja) 2002-11-27 2002-11-27 網目を有する収納体
JP2002343186 2002-11-27
JP2002343193 2002-11-27
JP2002343186A JP2004173568A (ja) 2002-11-27 2002-11-27 農業用ネット
JP2002354676A JP2004183417A (ja) 2002-12-06 2002-12-06 建築工事用ネット
JP2002354676 2002-12-06

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EP1403406B1 true EP1403406B1 (de) 2006-06-21

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Publication number Priority date Publication date Assignee Title
EP1854346A1 (de) 2004-11-16 2007-11-14 Mimcord S.A. Biologisch abbaubares textil
ES2261085B1 (es) * 2005-04-27 2007-11-16 Mimcord, S.A. Elemento laminar para la cubricion de invernaderos, carpas y similares.
ES2282021B1 (es) * 2005-07-12 2008-07-01 Mimcord, S.A. Tutor reciclable para cultivos verticales.
DE202008000100U1 (de) 2008-07-25 2008-10-30 Ludwig, Martin Textiles Flächengebilde aus Papiergarn
KR101008186B1 (ko) * 2010-10-14 2011-01-14 신진수 고강도 종이끈 및 이를 이용한 쇼핑백
US20160073592A1 (en) * 2013-05-01 2016-03-17 Nine Ip Limited Crop protection netting
CN104433061B (zh) * 2013-09-17 2016-08-17 凯晖科技股份有限公司 手工包的串接工艺
US10309061B2 (en) 2015-06-03 2019-06-04 Enterprises International, Inc. Methods for making repulpable paper strings and straps through pultrusion process and related devices for the same
ES1221442Y (es) * 2018-10-03 2019-02-26 Gold Fiber Europe S L Envase biodegradable para alimentos
US20220307168A1 (en) * 2021-03-29 2022-09-29 Hornwood, Inc. Mesh fabric and mesh fabric garment

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US1969095A (en) * 1931-11-04 1934-08-07 Brown Co Pulp yarn or twine
GB496744A (en) * 1936-03-04 1938-12-02 John Carleton Sherman Improvements in or relating to the manufacture of pulp rovings, yarns and twines
GB1282879A (en) * 1968-12-05 1972-07-26 Courtaulds Ltd A process for making paper yarns
US3905863A (en) * 1973-06-08 1975-09-16 Procter & Gamble Process for forming absorbent paper by imprinting a semi-twill fabric knuckle pattern thereon prior to final drying and paper thereof
US4225382A (en) * 1979-05-24 1980-09-30 The Procter & Gamble Company Method of making ply-separable paper
US6136146A (en) * 1991-06-28 2000-10-24 The Procter & Gamble Company Non-through air dried paper web having different basis weights and densities
JP2908318B2 (ja) * 1996-06-18 1999-06-21 京王製紙株式会社 紙製緩衝材
FI103417B1 (fi) * 1997-09-16 1999-06-30 Metsae Serla Oyj Paperiraina ja menetelmä sen valmistamiseksi

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DE60306284T2 (de) 2006-10-12
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US20040197538A1 (en) 2004-10-07

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