JP2012125212A - Agricultural film support member and method for testing characteristic thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce damage caused by contact with various films set in/out of an agricultural greenhouse.SOLUTION: The agricultural film support member can reduce damage caused by contact with a film because the friction resistance in a contact part in contact with the film is low. It is important for various equipment used in the agricultural greenhouse to prevent impairment of sunlight conditions caused by setting the equipment, and also for the agricultural film support member, it is desirable that the area of projection of the agricultural film support member when the agricultural film support member is set is as small as possible. Accordingly, the outer diameter (diameter) of the agricultural film support member is desired to be as narrow as possible. However, the narrower the diameter of the agricultural film support member is, the greater the damage to the film caused by local breaking is. As the friction resistance in the contact part is small, the degree of damage to the film caused by the local breaking can be reduced even if the outer diameter is narrow. By using a narrower agricultural film support member, the sunlight conditions can be further improved.

Description

  The present invention relates to an agricultural film support member for supporting a film installed inside and outside an agricultural greenhouse and a method for testing the characteristics thereof.

  Agricultural greenhouses include a jacket film stretched around the framework of the greenhouse, a film that opens and closes windows on the face and side of the greenhouse, and a greenhouse that can be opened and closed inside the greenhouse and provides light-shielding and heat-retaining functions. Various films, such as a film used as a curtain for an automobile, are used. In the case of these films, for example, a covering film or a film that opens and closes a window portion, a pressing member (resin-coated flat wire) is disposed on the outer surface (see Patent Document 2). This pressing member (resin-coated flat wire) is positioned as a film support member that performs the function of preventing the film from flapping by wind or the like. In the case of a greenhouse curtain, the greenhouse curtain is opened and closed along the shelf line. A shelf line functions as a film support member arrange | positioned so that the lower surface of a greenhouse curtain may be contact | connected (refer patent document 1).

JP-A-11-168994 Japanese Patent Publication No.59-6786

  As shown in FIG. 4 of Patent Document 1, when a greenhouse curtain is operated in a closing direction on a shelf line that is in contact with the lower surface of the greenhouse curtain, a tip pipe attached to the tip of the greenhouse curtain. When it moves in the opening direction, it is pushed by the tip pipe and collected. As the shelf line, a metal or resin wire (wire) is used, but since it is a thin wire having a diameter (outer diameter) of 10 mm or less (usually 2 to 8 mm), it is locally generated when it is rubbed during opening and closing operations. Damage is caused by friction. In particular, the wire placed on the surface side of the greenhouse has a problem that the greenhouse curtain is also hung down on the side of the surface of the greenhouse, so that the local damage at the contact portion is greater due to the load of the greenhouse curtain. is there.

  In Patent Document 1, as shown in FIG. 1 and the like, in order to reduce such local damage when a wire having an outer diameter of 10 mm or less is used, a metal made of a metal having an outer diameter of more than 10 mm is used instead of the wire. Alternatively, it has been proposed to use a resin pipe. By increasing the outer diameter, the curvature of the greenhouse curtain at the contact portion with the pipe becomes larger than that of the wire, and the degree of damage due to the load of the greenhouse curtain is reduced. However, even when such a pipe having a large outer diameter is used, it is of course desirable that the degree of damage to the greenhouse curtain is further reduced.

  On the other hand, in consideration of the cost, in practice, it is still more common to use a wire having an outer diameter of 10 mm or less than the conventional pipe rather than using such a pipe. In particular, polyethylene and polypropylene resins, polyester resins, and polyamide resin resin wires that are stretched to an outer diameter of about 2 mm to increase the strength are often used as intermediate lines other than the vicinity of both ends. However, the frictional resistance of these resins is relatively large, and the curtain is damaged due to constant contact friction, and no countermeasure has been taken.

  In addition, many coat films using vinyl chloride resin and polyolefin resin are mounted on the outer surface of the greenhouse, and a resin-coated flat wire material having a width of about 10 mm to 100 mm and a thickness of about 1 mm to 2 mm is used as a supporting (pressing) member for the film. Many are stretched at regular intervals. For example, as shown in Patent Document 2, the resin-coated flat wire material rubs around a polyethylene resin, a polypropylene resin, a polyester resin, a polyamide resin and a copolymer resin that are stretched to a core material to increase the strength. The structure is coated with a polyethylene resin, a polypropylene resin, or a soft vinyl chloride resin material that has less resistance and is relatively flexible compared to the core material. However, in order to prevent damage to the film, the low friction characteristics on the contact surface including the case where it is set to be wide in experience is not sufficient (see Comparative Example 10 described later), and when supporting as a greenhouse top surface film holder. In order to reduce the open / close resistance, the film may be damaged due to frictional resistance when it is supported as a shoulder film presser from the side of a greenhouse that requires continuous opening and closing. Even when installation with a gap between the film and a gap is not allowed, the film must be loosely attached, causing fluttering of the film due to wind, and an improvement is desired.

  The present invention has been made in view of the above, and provides an agricultural film support member capable of reducing damage due to contact with a film and a method for testing the characteristics thereof when supporting various films installed inside and outside an agricultural greenhouse. This is the issue.

In order to solve the above problems, the agricultural film support member of the present invention is an agricultural film support member that supports a film installed inside and outside an agricultural greenhouse, and at least the frictional resistance of the contact portion with the film is The following conditions: A low density polyethylene standard bag having a width of 90 mm (a friction coefficient μ of 0.1 to 0.35 according to ASTM-D-1894 between low density polyethylene standard bags) so that the weight is 150 g ± 5 g. A sine of the inclination angle at the time when the low-density polyethylene standard bag starts to slide when the film support member is suspended and supported by a film support member stretched with a tension of 98 N, and the film support member is inclined ( sin θ) satisfies 1/3 or less.
The agricultural film support member is preferably a wire having an outer diameter of 10 mm or less. The film is a greenhouse curtain that is opened and closed by being placed in a greenhouse, and the wire is preferably used as a shelf line that is stretched so as to be in contact with and support the greenhouse curtain. ing.
Moreover, it is preferable that at least the contact portion contains polytetrafluoroethylene (PTFE) or ultrahigh molecular weight polyethylene. Moreover, it is preferable that at least the contact portion is formed by blending a lubricant. The lubricant is preferably a silicone oil lubricant, a paraffin wax lubricant, a metal soap lubricant, talc or PTFE, or a mixture of two or more thereof. As the lubricant, a mixture of a lubricant having a relatively high antifriction effect and a lubricant having a relatively low lubrication effect is used. It is preferable that the blending ratio with the lubricant having a slow effect is in the range of 1: 4 to 4: 1.
In addition, the method for testing the characteristics of an agricultural film support member of the present invention is a method for testing the characteristics of an agricultural film support member that supports a film installed inside and outside an agricultural greenhouse. A film in which a load is applied so that the weight is 150 g ± 5 g and the tension is 98 N with a tension coefficient of ASTM-D-1894 between density polyethylene standard bags between ASTM-D-1894) The sine (sin θ) of the tilt angle at the time of sliding out of the low density polyethylene standard bag when the film support member is suspended and supported by the support member and tilted is measured, and the value is determined as the frictional resistance of the film. It is characterized in that it is obtained as a value for a characteristic.

Since the agricultural film support member of the present invention has low frictional resistance at the contact portion with the film, damage due to contact can be reduced. In particular, it is important that various equipment used for the greenhouse for agriculture does not lower the sunshine conditions due to the installation, and it is desirable that the projection area for the agricultural film support member be as small as possible. Therefore, while it is desired that the agricultural film support member has an outer diameter (diameter) as thin as possible, the thinner the film, the greater the degree of damage due to local folding on the film as described above. According to the present invention, since the frictional resistance at the contact portion is low, the degree of damage due to local folding of the film can be reduced even if the outer diameter is reduced. Therefore, sunshine conditions can be improved by using a thinner agricultural film support member.
In addition, by using the characteristic test method of the present invention, it is possible to obtain a frictional resistance characteristic that matches the actual operating conditions of the film and the support member.

It is a figure for demonstrating the method of a frictional resistance test. It is a figure for demonstrating the method of an operation test.

  Hereinafter, although the embodiment of the agricultural film support member of the present invention is described, the present invention is not limited to the following embodiment.

  The agricultural film support member of the present invention is a film installed inside or outside an agricultural greenhouse, such as a film forming a jacket of a greenhouse (such as a ceiling surface or a side surface), or a greenhouse curtain disposed in the greenhouse. The frictional resistance of the contact portion is not more than a predetermined value. Specifically, the frictional resistance of the contact portion is as follows: low density polyethylene standard bag having a width of 90 mm (friction coefficient μ = 0.15 to 0.35 according to ASTM-D-1894 between low density polyethylene standard bags) The low-density polyethylene when the load is applied so that the weight is 150 g ± 5 g, suspended by a film support member stretched with a tension of 98 N, and the film support member is inclined. The sine (sin θ) of the inclination angle when the standard bag starts to slide is 1/3 (0.333) or less (inclination angle of less than 20 degrees, if expressed as a friction coefficient, μ = tangent (tan θ) is 0.354 or less) And satisfying the above.

  As a typical example of such a low density polyethylene standard bag, for example, J. Film Co., Ltd. No. It is a 4-red label LDPE standard bag, and the friction coefficient between standard bags can be μ = 0.25 (manufacturer test value according to ASTM-D-1894). As long as the friction coefficients of the LDPE standard bags are the same, those manufactured by other companies may be used.

  Here, for example, a greenhouse curtain has a so-called flat tension method that is stretched almost horizontally in the greenhouse, but a so-called tilt that is tilted in a range of an inclination angle of about 5 to 15 degrees. A method of tension is also often used. The shelf line as an agricultural film support member that is disposed below the greenhouse curtain and supports the greenhouse curtain is also disposed at substantially the same inclination angle as the greenhouse curtain, and usually the tip of the greenhouse curtain is When moving to the upper side of the slope, the curtains are integrated and set to the open position of the curtain, and when moved to the lower side, the closed position is set to expand the curtain.

  When considering contact with the film (greenhouse curtain) in the inclined state as described above, it is desirable that the frictional resistance suitable for the agricultural film support member is also a predetermined value or less in the inclined state. As shown in the test examples to be described later, various materials were subjected to friction by the above-described frictional resistance test defined in the present invention and a general frictional resistance test on a plane shown in ASTM-D-1894 and the like. As a result of examining the resistance, it was found that the order of the magnitudes of the respective frictional resistance values does not always coincide between the two. Regarding the relationship between the contact area and the frictional force, the phenomenon that the frictional force depends on the friction coefficient and the load is the same. However, with regard to the friction coefficient, PTFE fluororesin having the minimum static friction coefficient μ = 0.05 and the dynamic friction coefficient μ = 0.10 among the resin materials confirmed by the existing planar test method is used. However, in the test method of the present invention, the sine of the inclination angle (sin θ) was 0.323, and μ = 0.34 when converted to the friction coefficient. In addition, as a reference, no. 4 Red label LDPE standard bag (width 90mm) is replaced with PTFE fluororesin film and set to PTFE fluororesin, sine (sin θ) is 0.219, and when converted to friction coefficient, μ = 0.22 Although the minimum of the products was recorded, it was confirmed that the frictional resistance was very large in the inclined state, which was significantly different from the known frictional resistance test. From these facts, it can be seen that the frictional resistance required for the agricultural film support member of the present invention is preferably obtained by measurement under conditions close to the actual operating conditions of the film and the support member.

  As an agricultural film support member of the present invention, a member that supports various films used inside and outside an agricultural greenhouse, for example, a pipe material that supports a film that forms a jacket in a greenhouse, and a film that forms a jacket are pressed. Examples include a pressing member (flat wire), a shelf line that supports a film constituting a greenhouse curtain disposed in a greenhouse.

  In the agricultural film support member of the present invention, since the frictional resistance under the above-described measurement conditions is not more than a predetermined value, the damage at the contact portion of the film in the actual operation situation is reduced. Therefore, it is possible to use a thinner one than the conventional one. In particular, when supporting a greenhouse curtain, the greenhouse curtain hangs down on the side of the wife, but as described in Patent Document 1, the outer surface is made of a metal having an outer diameter of 10 mm that is thicker than a normal shelf line. Alternatively, a resin pipe material may be used. However, according to the present invention, even when a thin wire rod having an outer diameter of 10 mm or less (usually a wire rod having an outer diameter of 2 to 8 mm) is used, the frictional resistance is small. Damage can be reduced as compared with the prior art. That is, it is not necessary to use a thicker agricultural film support member (pipe material, etc.) with a larger diameter in order to reduce damage due to local bending and frictional resistance. The area of the generated shadow can be reduced, and damage can be reduced even when the wire diameter is the same as that of a wire rod used conventionally as a shelf line.

  In order to achieve the above frictional resistance condition, the agricultural film support member of the present invention includes at least a contact portion with the agricultural film support member containing polytetrafluoroethylene (PTFE), ultrahigh molecular weight polyethylene, or a mixture thereof. It is preferable that In the case where the agricultural film support member is, for example, a pipe material, since it is a part that contacts the film, this part is formed from the material described above as a contact portion. Alternatively, in the case of a wire rod having an outer diameter of 10 mm or less (usually 2 to 8 mm) such as a shelf wire, the portion in contact with the film is the entire circumferential surface of the wire rod, and thus the entire circumferential surface is the contact portion. When the entire peripheral surface is a contact portion, the wire itself can be formed from the above-described material, or the peripheral surface of the wire can be coated with a film formed from the above-described material. Details of how to form the contact portion will be described later.

  In order to achieve the above-described friction resistance condition, the agricultural film support member of the present invention is replaced with the above-described means formed by PTFE, ultrahigh molecular weight polyethylene or the like, or in addition to these means, at least an agricultural film It is also preferable to mold the contact portion with the support member by blending a lubricant with the base resin constituting the contact portion.

  As the base resin in the case of blending a lubricant, polyethylene resin, vinyl chloride resin, polyacetal resin (homo, copoly), polyamide resin (6, 66, 11, 12), polyester resin (PET, PBT), polycarbonate resin , ABS resin and polyamide, polyester elastomer, and the like, but not limited thereto, polyester resin having high heat resistance, chemical resistance, and weather resistance when used as a supporting member (shelf line) for a greenhouse curtain (PET, PBT) or polycarbonate resin is preferably used, and is flexible when used as a support member (pressing member or the like) of a cover film (including a side window or a skylight forming part) provided outside the greenhouse. High vinyl chloride resin or ultrahigh molecular weight polyethylene resin is preferably usedIt can also be blended with an unsaturated polyester resin, an acrylic resin or the like and used as a paint-like resin as a resin coating. Moreover, you may mix | blend with PTFE and ultra high molecular weight polyethylene resin for the further improvement of friction resistance. Surprisingly, the resin modified by blending a general resin with a lubricant according to the present invention has a friction characteristic in the frictional resistance test rather than using PTFE alone in which the friction coefficient in the resin is minimized. It was confirmed that it was excellent (see the following test example).

  The lubricant to be blended is a silicone oil lubricant, a paraffin wax lubricant, a metal soap lubricant, talc or PTFE resin having excellent long-term stability such as chemical resistance and weather resistance. The blending amount only needs to satisfy the frictional resistance described above, but also depends on the frictional characteristics of the base resin. For example, 2% by weight or more is preferable when using a silicone oil-based lubricant having a high lubricating effect, and 4% by weight or more is preferable when using a metal soap-based lubricant. When using, 5 weight% or more is preferable, and when using talc and PTFE resin, 10 weight% or more is preferable. When PTFE fluororesin and ultrahigh molecular weight polyethylene resin are used as the base resin, an appropriate amount of the lubricant can be blended so as to obtain a predetermined frictional resistance regardless of the blending amount.

  The lubricant can be mixed with the base resin by a known method. A method of dry blending with a mixer such as a mixer or blender and supplying the mixture to an extruder, a Banbury mixer, a kneader, or a roll machine and melt-kneading may be used. However, mixing that also serves as kneading by an extruder during extrusion molding may be used.

  A silicone oil lubricant, a paraffin wax lubricant, a metal soap lubricant, talc, and PTFE fluororesin as lubricants can be used as a mixture. When these are mixed, a silicone oil lubricant and a metal soap lubricant, which are lubricants having a high antifriction effect, a talc, a PTFE fluororesin, and a paraffin wax lubricant with a relatively slow lubrication effect Lubricant with relatively high anti-friction effect (one kind of silicone oil-based lubricant or metal soap-based lubricant or a mixture thereof): lubricant with relatively slow lubricating effect (talc (Talc), PTFE fluororesin or paraffin wax-based lubricant, or a mixture of two or more thereof) = 1: 4 to 4: 1.

  The resin used in the present invention includes known antioxidants such as hinted phenols, phosphites, thioethers, aromatic amines, benzophenones, triazines, benzotriazoles as long as the object of the present invention is not impaired. In addition, various additives such as a light-proofing agent such as a hinted amine, an antistatic agent, a hydrolysis resistance improving agent, a metal deterioration preventing agent, and a coloring agent can be blended in appropriate amounts.

  The agricultural film support member of the present invention is made of the above-mentioned PTFE or ultrahigh molecular weight polyethylene on the peripheral surface of a metal or resin wire (single wire), or a metal or resin rope made by combining metal or resin fine wires. Alternatively, the resin blended with the above-mentioned lubricant in the base resin may be directly extruded and coated, but it may be extruded into a tube shape or extruded as a cover shape with grooves in the longitudinal direction. Or after being formed into a sheet (film) shape, this can be retrofitted to a metal or resin wire (single wire), or a metal or resin rope made by combining metal or resin fine wires. I do not care. As long as the resin is in contact with a portion in contact with a greenhouse curtain or the like, the other portion may be composed of other resin or metal material. In the case of a resin wire, direct molding may be performed using PTFE, ultrahigh molecular weight polyethylene, or a resin in which the above-described lubricant is blended with a base resin. Furthermore, it is also possible to use it by coating and impregnating the above-mentioned member or cloth-like sheet as a paint-like resin.

(Test example)
(Friction resistance test)
The frictional resistance test is a frictional resistance test close to the actual operating conditions of the greenhouse curtain and the exterior film, as shown in FIG. 4 Put an iron weight in a red label LDPE standard bag (width 90mm) so that the weight is 145g, and loosely hold it on the film support member so that the bag can hold the bag width 90mm. Sine of the tilt angle when the standard bag to which the load is applied slides out of the guide member (when the static friction resistance is exceeded) when one end of the film support member is lifted and tilted (sin θ) Asked. The film support member was stretched with a tension of 98N. The measurement was performed at room temperature of 23 ° C.

(Operation test)
As shown in FIG. 2, the “curtain and film operation test” was carried out on the two film support members held horizontally, CAI Kasei Bi-Metallic Silver 0.1, Bowtech, GA (thickness 0. 0). 1mm) and Ai Kasei Co., Ltd. Agricultural PO Sky Coat Textile 5 (thickness 0.15mm) two films are installed separately, one end is pushed and operated, and the friction in the convergence state and the operation feeling when visually observed The case where resistance was extremely good was judged as ◎, the case where it was good as ○, the case where it was slightly bad as Δ, and the case where it was poor as x. In addition, it implements about the said 2 film in both an Example and a comparative example, and the determination of an operation condition is comprehensive evaluation about 2 films.

(Test results)
In the resin composition and the frictional resistance, film support members that satisfy the conditions of the present invention are shown as Examples 1 to 12, and any film support members that do not satisfy the conditions of the present invention are shown as Comparative Examples 1 to 30. Reference Examples 1 to 5 show reference data for frictional resistance. The details of Examples, Comparative Examples and Reference Examples are as follows, and the results are shown in Tables 1 and 2.

  In Examples 1 to 12, the curtain and the film were in very good or good operating conditions, but in Comparative Examples 1 to 30, good results were not obtained. In addition, even if PTFE fluororesin having a minimum static friction coefficient μ = 0.05 and a dynamic friction coefficient μ = 0.10 among the resin materials confirmed by the existing planar test method is used, In the test method of the invention, the sine of the tilt angle (sin θ) was 0.323, and μ = 0.34 when converted to the friction coefficient (Example 12). In addition, as a reference, no. 4 Red label LDPE standard bag (width 90mm) is replaced with PTFE fluororesin film and set to PTFE fluororesin, sine (sin θ) is 0.219, and when converted to friction coefficient, μ = 0.22 Although the minimum of the products was recorded, it was confirmed that the frictional resistance was very large in the inclined state (reference example 1), which was greatly different from the known frictional resistance test. For the other existing general resins measured, the sine of the inclination angle (sin θ) is 0.354 (PP) of the minimum in Comparative Example 13, μ = 0.38 when converted to the friction coefficient, and the maximum is 0.00 of the Comparative Example 16. 521 (ETFE), converted to a friction coefficient, μ = 0.61. PVC (Comparative Examples 7 to 10) and ABS (Comparative Example 19), which are considered to have a high friction coefficient, have a sine (sin θ) of 0.365 to 0. .417, when converted to a friction coefficient, μ = 0.39 to 0.46, which was a relatively low value. In this frictional resistance test, which is close to the actual operating condition, it is difficult to obtain friction characteristics exceeding a certain standard and improve the friction characteristics of greenhouse curtains and film support members. In addition, the sine (sin θ) of the tilt angle when using a red label LDPE standard bag made by J Film Co., Ltd. as the support member and being made between LDPE resins was 0.385, and μ = 0.42 when converted to a friction coefficient ( Reference example 4).

(Detailed conditions of Examples, Test Examples, Reference Examples)
Example 1
Mitsubishi engineering plastics polybutylene terephthalate resin Novaduran 5010R3-2 55% by weight, Toray DuPont polyester elastomer, Hytrel 7277 30% by weight A resin composition prepared by mixing 30% by weight of silicone masterbatch BY27-009 manufactured by Toray Dow Corning Co., Ltd. containing 50% by weight of silicone with butylene terephthalate resin (containing 15% by weight of silicone as a resin composition) has an outer diameter of 4.2 mm. Coating directly.

Example 2
Toray Dow Corning Co., Ltd. containing 85% by weight of polybutylene terephthalate resin Novaduran 5010R3-2 made by Mitsubishi Engineering Plastics and 50% by weight of silicone in polybutylene terephthalate resin in a 7 x 7 wire rope made of steel wire with an outer diameter of 3.0 mm A resin composition prepared by mixing 10% by weight of silicone master batch BY27-009 and 5% by weight of paraffin wax 135 manufactured by Nippon Wax Co., Ltd. (containing 5% by weight of silicone and 5% by weight of paraffin wax as a resin composition) Direct coating to 2 mm.

Example 3
Toray Dow Corning Co., Ltd. containing 90% by weight of polybutylene terephthalate resin Novaduran 5010R3-2 made by Mitsubishi Engineering Plastics and 50% by weight of silicone in polybutylene terephthalate resin in a 7 x 7 wire rope made of steel wire with an outer diameter of 3.0 mm A resin composition in which 10% by weight of silicone master batch BY27-009 (containing 5% by weight of silicone as a resin composition) was mixed was directly coated so as to have an outer diameter of 4.2 mm.

Example 4
Toray Dow Corning Co., Ltd. containing 90% by weight of polybutylene terephthalate resin Novaduran 5010R3-2 made by Mitsubishi Engineering Plastics and 50% by weight of silicone in polybutylene terephthalate resin in a 7 x 7 wire rope made of steel wire with an outer diameter of 3.0 mm A resin composition in which 5% by weight of silicone master batch BY27-009 (containing 2.5% by weight of silicone as a resin composition) was mixed was directly coated so as to have an outer diameter of 4.2 mm.

Example 5
Resin composition comprising 90% by weight of polybutylene terephthalate resin Novaduran 5010R3-2 manufactured by Mitsubishi Engineering Plastics and 5% by weight of paraffin wax 135 manufactured by Nippon Wax Co. The object was directly coated to an outer diameter of 4.2 mm.

Example 6
95% by weight of a resin obtained by pulverizing a water pipe HW pipe VW / VP13 (outer diameter 18 mm) made by CI Kasei Co., Ltd. on a round bar made of vinyl chloride resin having an outer diameter of 12.5 mm, calcium stearate made by NOF Corporation, A resin composition in which 5% by weight of calcium stearate was mixed was pressed to prepare a film having a thickness of 0.15 mm and mounted (outer diameter after mounting 12.8 mm).

-Example 7
79.5 wire rope made of steel wire having an outer diameter of 3.0 mm, 99.5% by weight of ultra high molecular weight polyethylene resin Lübmer L5000 manufactured by Mitsui Chemicals, and triazine-based UV absorber tinuvin 1577 manufactured by BASF as the UV absorber are set to 0.005. The resin composition mixed by 5% by weight was directly coated so as to have an outer diameter of 4.2 mm.

Example 8
A tube having an inner diameter of 12 mm and an outer diameter of 14 mm was prepared and attached to a 1 × 7 wire rope made of steel wire having an outer diameter of 3.6 mm using an ultra-high molecular weight polyethylene resin Lübmer L5000 manufactured by Mitsui Chemicals.

Example 9
A resin composition in which 90% by weight of polypropylene resin Sumitomo Nobrene AH561 manufactured by Sumitomo Chemical Co., Ltd. and 10% by weight of general-purpose talc SSS manufactured by Nippon Talc Co., Ltd. is pressed into a resin wire made of polyethylene terephthalate resin having an outer diameter of 2 mm to have a thickness of 0.25 mm. A film was prepared and mounted (outer diameter 2.5 mm after mounting).

Example 10
A U-shaped extrudate with an inner diameter of 4 mm and an outer diameter of 5 mm was prepared on a 1 × 7 wire rope made of steel wire with an outer diameter of 3.6 mm using a polycarbonate resin Iupilon LS-2030 containing 15% by weight of PTFE made by Mitsubishi Engineering Plastics. Installed.

Example 11
A 1x7 wire rope made of steel wire with an outer diameter of 3.6 mm was pressed with APEX-AF0010N containing 10% by weight of PTFE made by Apex Japan, and a film having a thickness of 0.3 mm was prepared and attached (outer diameter after attachment) 4.2 mm).

Example 12
A PTFE film manufactured by NICHIAS Corporation and Naflon tape 9001 (thickness 0.1 mm) were attached to a 1 × 19 wire rope made of SUS304 having an outer diameter of 5 mm (outer diameter after attachment: 5.2 mm).

Comparative example 1
A commercially available extruded round bar made of polybutylene terephthalate resin having an outer diameter of 10 mm and used for physics or industrial machining applications (unknown manufacturer, etc.) was directly used.

Comparative example 2
A commercially available extruded round bar made of polybutylene terephthalate resin having an outer diameter of 20 mm used for physics or industrial machining applications (unknown manufacturer, etc.) was directly used.

Comparative example 3
A resin wire made of polyethylene terephthalate resin (support member commercial product) manufactured by Dainichi Steel Co., Ltd. having an outer diameter of 2 mm was directly used.

Comparative example 4
A polyethylene terephthalate resin resin wire (support member commercial product) manufactured by Dainichi Steel Co., Ltd. having an outer diameter of 4 mm was directly used.

Comparative example 5
90% by weight of polybutylene terephthalate resin Novaduran 5010R3-2 manufactured by Mitsubishi Engineering Plastics Co., Ltd., molybdenum disulfide, Mori powder PA, PB, PS manufactured by Mitsubishi Engineering Plastics Co., Ltd. A resin composition in which 10% by weight was mixed was pressed to produce a film having a thickness of 0.3 mm and mounted (outer diameter after mounting: 4.2 mm).

Comparative Example 6
A 7 × 7 wire rope made of steel wire having an outer diameter of 1.5 mm was directly coated with a polyester elastomer, Hytrel 7277, manufactured by Toray DuPont, so as to have an outer diameter of 2.8 mm.

Comparative example 7
A commercial product of vinyl chloride resin-coated iron wire having an outer diameter of 0.9 mm (# 20, manufacturer name unknown) was directly used.

Comparative Example 8
A commercially available extruded round bar made of vinyl chloride resin having an outer diameter of 12.5 mm used for physics or industrial machining applications (unknown manufacturer, etc.) was directly used.

Comparative Example 9
A water pipe Hama pipe VW / VP13 made of vinyl chloride resin having an outer diameter of 18 mm and used as a support member was directly used.

Comparative Example 10
A 1 × 7 wire rope made of steel wire having an outer diameter of 3.6 mm, a product sold by Watanabe Pipe Co., Ltd. having an outer diameter of 19.4 mm, and a vinyl chloride resin film holding member long holder (for φ19) were attached.

Comparative Example 11
A 7 × 7 wire rope made of steel wire having an outer diameter of 2.5 mm was directly coated with a high-density polyethylene resin, Novatec HD, HJ560 manufactured by Nippon Polyethylene Co., Ltd. so as to have an outer diameter of 4.2 mm.

Comparative Example 12
A product sold by Koyama Shoji Co., Ltd., a low-density polyethylene resin-coated support member, and a linear band 2-10-40S (width 10 mm, thickness 1 mm) were directly used.

Comparative Example 13
A 7 × 7 wire rope made of steel wire having an outer diameter of 1.5 mm was directly covered with a polypropylene resin Sumitomo Nobrene AH561 made by Sumitomo Chemical Co., Ltd. so as to have an outer diameter of 2.8 mm.

Comparative Example 14
A commercial product made of polycarbonate resin pipe with an outer diameter of 8 mm used for physics or industrial machining applications (unknown manufacturer, etc.) was used directly.

Comparative Example 15
A SUS304 1 × 19 wire rope having an outer diameter of 5 mm was equipped with a Daikin Industries PFA film and a NEOFLON PFA film AF-0100 (thickness 0.1 mm) (outer diameter 5.2 mm after mounting).

Comparative Example 16
A 7 × 7 wire rope made of steel wire having an outer diameter of 1.5 mm was directly coated with ETFE fluororesin, Fullon C88-AP manufactured by Asahi Glass Co., Ltd. so as to have an outer diameter of 2.8 mm.

Comparative Example 17
A commercially available extruded round bar made of polyacetal resin with an outer diameter of 8 mm used for physics or industrial machining applications (unknown manufacturer, etc.) was directly used.

Comparative Example 18
A commercially available extruded round bar made of polyacetal resin having an outer diameter of 25 mm used for physics or industrial machining applications (unknown manufacturer, etc.) was directly used.

Comparative Example 19
A commercially available extruded round bar made of ABS resin having an outer diameter of 5 mm used for physics or industrial machining applications (unknown manufacturer, etc.) was directly used.

Comparative Example 20
A product made by Seiwa Co., Ltd. having an outer diameter of 10 mm and a polyamide 12 resin tube used as a supporting member was attached to a 1 × 7 wire rope made of steel wire having an outer diameter of 3.6 mm.

Comparative Example 21
Resin coated with 0.5 wt.% Silicone oil-containing polyamide 12 resin (SL nylon) on a 7 x 7 wire rope made of steel wire with an outer diameter of 2.5 mm sold by Toyoflex Co., Ltd. so as to have an outer diameter of 3.6 mm A commercially available coated wire rope was used.

Comparative Example 22
A 1 × 7 wire rope made of steel wire with an outer diameter of 3.6 mm was fitted with a product sold by Seiwa Co., Ltd. with an outer diameter of 22 mm used as a support member, and a U-shaped product made of aluminum (surface silver anodized sealed product). .

Comparative Example 23
A SUS304 hard wire commercial product (# 14, unknown manufacturer, etc.) having an outer diameter of 2.0 mm used as a support member was directly used.

Comparative Example 24
A commercially available SUS304 hard wire having an outer diameter of 4.0 mm used as a supporting member (# 8, unknown manufacturer, etc.) was directly used.

Comparative Example 25
A commercially available SUS304 steel pipe product (manufacturer unknown) is attached to a 1 × 7 wire rope made of steel wire having an outer diameter of 3.6 mm.

Comparative Example 26
A product sold by Asano Metal Industry Co., Ltd. used as a support member, and a 1 × 19 wire rope made of SUS304 having an outer diameter of 4.0 mm was directly used.

Comparative Example 27
A new steel 1 × 7 wire rope having an outer diameter of 3.6 mm manufactured directly by J-Wytex Co., Ltd., which is used as a supporting member, was directly used.

Comparative Example 28
The oil used in the manufacturing process adhering to a new steel 1 × 7 wire rope made by J-Wythex, which is used as a support member, and having an outer diameter of 3.6 mm was degreased with a solvent and used directly.

Comparative Example 29
A 5 × year installation in a greenhouse for agriculture was directly used with a steel 1 × 7 wire rope manufactured by J-Wytex Co., Ltd., which is used as a support member and having an outer diameter of 3.6 mm.

Comparative Example 30
An eight-strand rope made of polyester fiber having an outer diameter of 3.5 mm (a reverse slope), which is used as a greenhouse curtain device driving member and a supporting member, was directly used.

・ Reference Example 1
Nichias PTFE film, Naflon tape 9001 (thickness 0.1 mm), 90 mm wide J Film Co., Ltd. No. 4 A red label LDPE standard bag equivalent product is prepared, and a PTFE film made of Nichias and Naflon tape 9001 (thickness: 0.1 mm) are attached to a 1 × 19 wire rope made of SUS304 having an outer diameter of 5 mm (outer diameter after installation is 5. 2 mm), and set so that the PTFE films contact each other.

・ Reference Example 2
GUNZE, manufactured by Seiwa Co., Ltd., sold on PET resin fiber non-woven paper Luton (thickness 0.1 mm), coated with calcium stearate and calcium stearate made by NOF Corporation. A polyethylene terephthalate resin resin wire (a commercially available support member) was attached.

・ Reference Example 3
Non-woven paper Luton (thickness: 0.1 mm) made of PET resin fiber sold by Gunze Co., Ltd. and coated with paraffin wax 135 made by Nippon Wax Co., Ltd., polyethylene terephthalate made by Dainippon Steel Co., Ltd. It attached to the resin-made resin wire (support member commercial item).

Reference example 4
No. made by J Film Co., Ltd. 15 Using a red label LDPE standard bag (thickness 0.03 mm), attach it to an extruded round bar made of PBT resin with an outer diameter of 10 mm (outer diameter 10.1 mm after mounting), and use it as a red label standard bag made by J Film Co., Ltd. It set so that the used LDPE resin might contact.

Reference example 5
A 1 ml measuring pipette made of borosilicate glass with an outer diameter of 7 mm sold by Shibata Kagakusha was used directly.

Claims (8)

An agricultural film support member for supporting a film installed inside and outside an agricultural greenhouse,
At least the frictional resistance of the contact portion with the film has the following condition:
A load is applied to a low density polyethylene standard bag with a width of 90 mm (friction coefficient μ of 0.1 to 0.35 according to ASTM-D-1894 between low density polyethylene standard bags) so that the weight is 150 g ± 5 g. The sine (sin θ) of the inclination angle at the time of sliding out of the low density polyethylene standard bag when the film support member is suspended and supported by a tension of 98 N and the film support member is inclined is 1 / 3 or less,
An agricultural film support member characterized by satisfying the above.   The agricultural film support member according to claim 1, wherein the film has an outer diameter of 10 mm or less.   The agricultural film support according to claim 2, wherein the film is a greenhouse curtain that is disposed in a greenhouse and opened and closed, and the wire is a shelf line that is stretched so as to be in contact with and support the greenhouse curtain. Element.   The agricultural film support member according to any one of claims 1 to 3, wherein at least the contact portion contains polytetrafluoroethylene (PTFE) or ultrahigh molecular weight polyethylene.   The agricultural film support member according to claim 1, wherein at least the contact portion is formed by blending a lubricant.   The agriculture according to claim 5, wherein the lubricant is a silicone oil lubricant, a paraffin wax lubricant, a metal soap lubricant, talc or PTFE, or a mixture of two or more thereof. Film support member.   As the lubricant, a mixture of a lubricant having a relatively high antifriction effect and a lubricant having a relatively low lubrication effect is used. The agricultural film support member according to claim 6, wherein a blending ratio with a lubricant having a slow effect is in a range of 1: 4 to 4: 1. A method for testing characteristics of an agricultural film support member for supporting a film installed inside and outside an agricultural greenhouse,
A load is applied to a low density polyethylene standard bag with a width of 90 mm (friction coefficient μ of 0.1 to 0.35 according to ASTM-D-1894 between low density polyethylene standard bags) so that the weight is 150 g ± 5 g. Then, suspended and supported by a film support member stretched with a tension of 98 N, and measured the sine (sin θ) of the inclination angle when the low-density polyethylene standard bag starts to slide when the film support member is inclined. And the characteristic test method of the agricultural film support member which calculates | requires the value as a value about the frictional resistance characteristic of the said film.

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