JP5264669B2 - FRUIT PROTECTION COATING AND METHOD - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fruit protection cover which causes no fuzz and the opening of which can be reliably blocked. <P>SOLUTION: The cover 1 is made of a cylindrical knit fabric formed by weaving a monofilament of 1-33 dtex, is set in such a condition that loops forming the cylindrical knit fabric are elongated and the monofilament F is arranged in a warp direction, and has a maximum elongation in a weft direction of not less than 10% and a fabric weight of 10-100 g/m<SP>2</SP>. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a fruit-protecting covering for preventing damage caused by wind and rain of fruits and pest damage, and a method for producing the same.

  Fruits cultivated in the open field are easily damaged by natural disasters such as wind and rain and pests. Therefore, measures are taken to prevent such damage by covering the whole fruit with a bag. The work of putting the bag on the fruit takes time, and the paper bag has poor durability. Therefore, a fruit bag using a tubular knitted fabric has been proposed.

For example, in Patent Document 1, a fruit composed of a cylindrical knitted fabric of hydrophobic fibers having a stretchability of 10% or more in the lateral direction of the knitted fabric and a basis weight of 60 to 250 g / m ² . A protective and growth promoting bag is described. In Patent Document 2, a chemical fiber yarn having a single fiber thickness of 1 to 10 denier is false twisted, knitted into a tubular knitted fabric bag using a stretched yarn, and then the tubular knitted fabric A bag for overwintering of mid-night citrus fruits with heat treatment by twisting 1 to 40 times per meter in the longitudinal direction and water repellent treatment on the ground bag, and having many wrinkles and water repellency on the knitted fabric Is described.

Japanese Utility Model Publication No. 57-19993 Japanese Patent No. 4019340

  In the above-described prior art, the tubular knitted fabric is made stretchable so that the fit to the fruit is good and the efficiency of the attachment work is improved, but multifilaments are used as yarns used for the tubular knitted fabric. When used, there is a drawback that fluff is likely to occur during knitting. When the state where the surface of the fuzzy knitted fabric is in contact with the fruit continues for a long time, the fruit surface may be adversely affected. Moreover, when attaching a bag to a fruit, there exists a fault which a knitted fabric is caught in the skin of a fruit, a bark, or a worker's hand skin, and it is difficult to handle and it is easy to tear.

  Further, when knitting a tubular knitted fabric, there is a limit to knitting in a narrow width, and when the knitted fabric is covered as it is, the opening may not be sufficiently closed. In Patent Document 2, the tubular knitted fabric is twisted and heat-treated to give wrinkles. However, it cannot be surely blocked, and the yarn is loaded with a twist and is likely to become fluffy. There is a fear.

  Then, an object of this invention is to provide the covering body for fruit protection which an opening part can obstruct | occlude reliably without fuzzing.

The covering for fruit protection according to the present invention is a tubular knitted fabric knitted with monofilaments of 1 decitex to 33 decitex, and the monofilament is bent by stretching the loop constituting the tubular knitted fabric. is set to a state of being arranged in the warp direction, the maximum elongation of the weft direction and wherein the basis weight of 10% or more is ^{10g / m 2 ~100g / m 2} . Furthermore, the monofilament is a monofilament obtained by dividing a bulky processed yarn having elasticity. Furthermore, the cylindrical knitted fabric is characterized by having a circumferential length of 20 mm to 150 mm.

The method for producing a fruit protecting covering according to the present invention uses a monofilament of 1 decitex to 33 decitex obtained by splitting a bulky processed yarn having elasticity, and has a basis weight of 10 g / m ^{2 to} 150 g / m ^2. In a state where the tubular knitted fabric is knitted, and a tensile force in the warp direction is applied to the knitted tubular knitted fabric so that the loop of the tubular knitted fabric is stretched so that the monofilament is bent. It is characterized by heat setting.

  By having the above-described configuration, since the tubular knitted fabric is knitted with monofilaments of 1 dtex to 33 dtex, fuzz like multifilaments does not occur. In addition, since the loops constituting the tubular knitted fabric are stretched and the monofilaments are arranged in the warp direction, the interval between the arranged monofilaments is set narrow, and the tubular knitted fabric is further narrowed. The width can be set, and the opening can be reliably closed. Moreover, since it can extend | expand in a weft direction so that it may spread between monofilaments, it becomes possible to coat | cover a cylindrical knitted fabric with respect to a fruit, and the efficiency of attachment work improves. Further, by using a thin monofilament of 1 decitex to 33 decitex, sunlight enters the surface of the fruit without any spots, and the influence covered by the covering can be minimized.

And, by setting the maximum elongation rate in the weft direction to 10% or more, even if the fruit is covered with a covering from the small fruit stage, the covering will expand in the weft direction in accordance with the actual growth. will, by the basis weight and ^{10g / m 2 ~100g / m 2} , almost no influence of the weight of the cover has on the fruit.

It is an external appearance perspective view regarding embodiment which concerns on this invention. It is AA sectional drawing and BB sectional drawing of FIG. It is an external appearance perspective view regarding the state which attached | attached and attached the cover to the fruit. It is explanatory drawing regarding the manufacturing process of a covering.

  Hereinafter, embodiments according to the present invention will be described in detail. The embodiments described below are preferable specific examples for carrying out the present invention, and thus various technical limitations are made. However, the present invention is particularly limited in the following description. Unless otherwise specified, the present invention is not limited to these forms.

  FIG. 1 is an external perspective view of an embodiment according to the present invention, and FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1 (FIG. 2A) and a cross-sectional view taken along the line BB in FIG. is there. The fruit protecting covering 1 is made of a narrow tubular knitted fabric. As shown in FIG. 2 (a), the width D in the state where the inner peripheral surface is in close contact and set in a flat shape is 10 mm to 75 mm, and the length in the circumferential direction is 20 mm to 150 mm, which is twice the width D. Is set to If the length in the circumferential direction is smaller than 10 mm, it is difficult to attach to the fruit, and if it exceeds 150 mm, the opening is not sufficiently closed when attached to the fruit.

  The length in the longitudinal direction may be set by cutting to an appropriate length according to the fruit that covers the knitted long cylindrical knitted fabric, for example, about 170 mm to 300 mm. .

  The openings 2 and 3 at both ends are folded back so that the fruit can be easily inserted when attached to the fruit. You may make it form the folding | turning of an edge part only in one opening part.

  The covering 1 is knitted by a circular knitting machine using monofilaments of 1 dtex to 33 dtex, and the monofilament is preferably a hydrophobic synthetic fiber, such as polyester fiber, polyamide fiber, polyolefin fiber, polypropylene fiber, polylactic acid. Examples thereof include fibers and vinylon fibers. As shown in the enlarged view of FIG. 1, the loop L constituting the cylindrical knitted fabric of the covering 1 is stretched in the warp direction (longitudinal direction of the covering 1) so that the monofilament F constituting the loop L is bent. Are arranged in the longitudinal direction. The length of the stretched loop L in the warp direction is a fine mesh of about 1 mm to 3 mm.

  Since it has such a stitch structure, it has stretchability in the weft direction (width direction of the covering 1), and can be stretched to expand the loop L by pulling in the weft direction. The maximum elongation in the weft direction is 10% or more, preferably 50% or more. If the maximum elongation rate is 10% or more, the covering 1 can be attached before the fruit ripens to protect it from wind and rain and pest damage. Moreover, if the maximum elongation rate is 50% or more, the covering 1 can be attached from the stage where the fruit is small, and the fruit can be protected over a long period of time.

It is preferred basis weight of the tubular knitted fabric constituting the cover member 1 is a ^{10g / m 2 ~100g / m 2} . If it is less than 10 g / m ² , the mesh of the tubular knitted fabric becomes large and pests easily enter. Moreover, when it exceeds 100 g / m < ² >, a mesh | network becomes small and the transmittance | permeability of sunlight will become low, and the influence of a coating body will come to affect the fruit surface.

  FIG. 3 is an external perspective view of a state in which the covering 1 is attached to a fruit. One end portion of the covering 1 where the opening 2 is formed covers the fruit infarction and is in close contact with the fruit infarction. In the portion covering the fruit, as shown in the enlarged view, the loop L constituting the covering 1 expands in the weft direction and comes into close contact with the fruit surface. The other end portion where the opening 3 is formed remains in a narrowed state without expanding in the weft direction.

  Since the covering body 1 has elasticity in the weft direction, one end portion of the opening 2 is in close contact with the infarction so that pests such as ants cannot enter, and the opening 3 The other end portion is also closed in a state where the opening 3 is constricted, and similarly, the invasion of pests is prevented.

  About the part which covers the fruit surface, the loop L spreads in the weft direction, becomes a mesh shape, and sunlight penetrates sufficiently. Moreover, since the fineness of 1 decitex to 33 decitex is used as the monofilament F, the shadow of the monofilament does not affect the fruit surface, and the fruit surface is irradiated with sunlight without any spots. When the fineness of the monofilament becomes thicker than 33 dtex, the fruit surface is not irradiated with sunlight evenly, and the color of the fruit surface becomes a spotted pattern.

  And since a monofilament is used, since fluff does not arise like the case where a multifilament is used, even if it adheres to the fruit surface, there is almost no influence which acts on the fruit surface.

  In addition, since the mesh is fine even in the mesh state where the loop L is expanded, it is possible to reliably prevent the invasion of pests and damage to the fruit surface. Furthermore, since the hydrophobic monofilament is used, it becomes difficult for raindrops to adhere to the fruit, and the influence on wind and rain can be reliably suppressed.

  In order to set the loop L constituting the covering 1 to the stretched state as described above, a monofilament obtained by dividing a bulky processed yarn having elasticity as the monofilament F may be used. Such a monofilament is deformed in a state of being bent or bent at various places as if twisted in a state where it is not pulled in the yarn length direction. It remains. Therefore, by applying a tensile force in the warp direction to the knitted tubular knitted fabric, the deformation of the monofilament is stretched and set in a state arranged in the warp direction.

  In addition, although the monofilament obtained by dividing | segmenting the bulky processed yarn which has a stretching property is used, even if it uses in the multifilament which put together such a monofilament, it can set to the state which extended the loop.

  FIG. 4 is an explanatory diagram regarding the manufacturing process of the covering 1. First, a monofilament F obtained by dividing a bulky processed yarn having elasticity is set on a known circular knitting machine M, and a tubular knitted fabric N is knitted. The knitted tubular knitted fabric is wound around a bobbin to obtain a roll 10 (FIG. 4A).

  Next, the cylindrical knitted fabric N is fed from the roll 10 and conveyed by the feed rollers 11 and 12. At that time, the feed speed of the feed roller 12 is set slightly faster than that of the feed roller 11, so that a tensile force in the warp direction is applied to the tubular knitted fabric N, and a loop constituting the tubular knitted fabric N is formed. Set to stretched state. A heating device 13 is provided between the feed rollers 11 and 12 to heat and set the tubular knitted fabric N in a state where the loop is stretched. The heat-set tubular knitted fabric N is taken up by the take-up roll 14 (FIG. 4B).

  And the winding roll 14 is brought into the place where attachment work, such as an orchard, is performed, cut | disconnected to predetermined length, and the covering 1 is attached so that a fruit may be covered. In addition, when attaching to a fruit, you may make it cut | disconnect leaving a suitable length, after attaching once to a fruit, without cut | disconnecting.

  As the monofilament, a monofilament made of 22 dtex polyester fiber was used (manufactured by Aichi Fibers Co., Ltd.). This monofilament is obtained by splitting a bulky processed yarn having elasticity.

A monofilament was knitted with a circular knitting machine (manufactured by Eiko Sangyo Co., Ltd.) at 13 courses / inch and 19 wales / inch, and 240 needle loops. The basis weight was 30 g / m ² .

  As shown in FIG. 4, the tubular knitted fabric was subjected to a heat setting treatment at 100 ° C. by applying a tensile force in the warp direction to stretch the loop. The treated tubular knitted fabric had a width of 20 mm, and the monofilaments constituting the loop were arranged in the warp direction. When the tubular knitted fabric was expanded in the weft direction, it could be expanded to a width of 100 mm. The maximum elongation was 500%.

  The tubular knitted fabric was cut by a length of 270 mm to form a covering, and figs having a diameter of 25 mm to 35 mm were actually attached. The fruit infarction part was covered for 70 mm, and the fruit part was covered with 50 mm. The covering was in close contact with the infarction portion and the fruit portion, and was closed from the fruit portion to the open end, and no gap was formed to allow infestation of insect pests such as Drosophila.

  At the stage when 3 months had passed since the covering body was attached, the covering body was not displaced, and the fruit surface was uniformly irradiated with sunlight, and no speckled pattern was formed.

1 Cover for fruit protection 2 Opening 3 Opening F Monofilament L Loop

Claims (4)

A tubular knitted fabric knitted with monofilaments of 1 decitex to 33 decitex, wherein the loops constituting the tubular knitted fabric are stretched and arranged in a warp direction so that the monofilaments are bent. cage, fruit protective jacket which the maximum elongation of the weft direction and wherein the basis weight of 10% or more is ^{10g / m 2 ~100g / m 2} .   The covering body for fruit protection according to claim 1, wherein the monofilament is a monofilament obtained by splitting a bulky processed yarn having elasticity.   The said cylindrical knitted fabric is 20 mm-150 mm in the length of the circumferential direction, The covering body for fruit protection of Claim 1 or 2 characterized by the above-mentioned. The bulked yarn having a stretchable minute fiber and basis weight by using a 1 decitex to 33 decitex monofilament obtained is knitted tubular knitted fabric with ^{10g / m 2 ~150g / m 2} , organized tubular A fruit-protecting covering characterized by applying a tensile force in the warp direction to the knitted fabric and stretching the loop of the tubular knitted fabric so that the monofilament is bent and heat-set in a state aligned in the warp direction Production method.

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