JP3201316U - Shading cover material for field packaging - Google Patents

Abstract

[PROBLEMS] To provide a light-shielding cover material covering the entire packaging material such as a flexible container bag, which has a larger size and is lighter than the conventional packaging material. Provided is a light shielding cover material for a field packing material that requires less welding work. By overlapping a fiber wrap of the skin, an intermediate base fabric 12 which is a woven fabric, and a fiber wrap of a base material including at least two kinds of short fibers having different finenesses, the whole is integrated only by a needle punch, A three-layer structure of a base felt layer 16 having a basis weight of 250 to 350 g / m 2, a base fabric 12, and a base felt layer 16 having a basis weight three times or more than the skin felt layer 14 is formed. [Selection] Figure 3

Description

  The present invention relates to a light-shielding cover material that covers the entire packaging material such as a flexible container bag that has been stacked in a field. The present invention relates to a shading cover material for a field packing material that requires less welding work.

  The flexible container bag or the cross container bag 1 (FIG. 1) is a bag-like packaging material for storing and transporting earth and sand, powder or granular cargo, and is generally a flexible container (registered trademark), flexible container bag or container bag. It is called. The flexible container bag is composed of a bag-like sheet woven with strong chemical fiber yarns such as polyethylene and polypropylene, and a durable hanging belt that supports the entire bag is sewn on the top, and the bag is lifted with a forklift or crane, etc. be able to. Storage of earth and sand is performed from the upper opening, and the opening can be closed by a gusset portion, and can be folded small when not in use.

  In 2011, the Fukushima nuclear power plant exploded due to the Great Tohoku Earthquake, and a wide range of soil surfaces in the vicinity of Fukushima Prefecture were polluted by radioactive radiation. Work is progressing gradually. As shown in FIG. 1, the contaminated soil removed by this decontamination work is stored in each flexible container bag 1 and temporarily stored in a temporary storage place 2 (an intermediate facility for temporarily storing the bags in several stages). Fig. 1) is currently under construction. In the temporary storage place 2, the water-proof sheet 3 and the protective sheet 4 are laid on the ground, and then a plurality of flexible container bags 1 are stacked, and these are surrounded by the shielding sandbag 5 and covered with the light-shielding sheet 6. A plurality of sandbags 7 are placed at an appropriate interval to prevent the light shielding sheet 6 from being displaced.

  Conventional light shielding sheets are mainly used for agriculture, horticulture, or civil engineering, and are disclosed in Japanese Patent Application Laid-Open Nos. 8-9794 and 10-84794 for agriculture and horticulture. This type of light-shielding sheet is made of a non-woven fabric that is a spunbond of polyolefin or melt blown, and is not suitable as a cover material for covering a flexible container bag in terms of durability, strength, and dimensions. On the other hand, JP-A No. 2000-157947 for civil engineering provides a light-shielding sheet that covers the surface of a waterproof mat that is laid to prevent leakage of contaminated water at a waste disposal site. There is provided a hardly water-permeable civil engineering sheet in which fine earth particles do not flow out from the openings of the mesh and the amount of moisture and gas permeation can be controlled. These light-shielding sheets are similar in use to the light-shielding cover material for field packaging, but the dimensions are 2 m wide × 20 m long.

JP-A-8-9794 Japanese Patent Laid-Open No. 10-84794 JP 2000-157947 A Japanese Patent Laid-Open No. 2005-223017

  Since the conventional light-shielding sheet has a width of 2 m and a length of 20 m, when laying on the temporary storage place 2, as shown in FIG. 2, four sheets are first pasted together in advance with three welding wires a, and the width is 8 m. X Folded and rolled up in a length of 20 m to obtain a wound sheet 8. The take-up sheet 8 is conveyed while being hung on a sling belt, lifted by a crane in the temporary storage place 2, lifted onto the flexible container bag 1, and then expanded and applied. In this construction work, the area of the temporary storage place 2 is generally about 20 m wide and about 85 m long, so that four more sheets 8 are bonded together in parallel with the welding wire b, and then another 5 sets. Need to be bonded together in the vertical direction with the welding line c. Since the sheet bonding welding lines a, b, and c are generally curved except for a, it is necessary for the operator to carry the welding while moving along the line with a hand-held burner. In addition, since the welding lines a, b, and c for bonding are very long as a whole, a great amount of time and labor are spent on the welding work.

The light shielding sheet disclosed in JP-A-2000-157947 is formed by laminating a specific light-resistant cloth sheet, a light-resistant fiber web, a reinforcing material cloth sheet, and a cushion material in order, and entangled by needle punching. Although this light-shielding sheet has a thickness of 5 to 20 mm and a basis weight of 1000 to 3000 g / m ^2, it is a total of four layers and is expensive because a light-resistant material is used for the upper two layers. Since there are two layers, it is difficult to bend as a whole, so laying work is difficult. The size of the light-shielding sheet is not specified, and therefore, it can only be estimated that the width is 2 m × 20 m.

  Moreover, the civil engineering sheet disclosed in JP-A-2005-223017 was obtained by needle punching a ventilation / water permeability control sheet made of a synthetic fiber fabric having a boiling water shrinkage of 10% or more and a synthetic fiber web. It is also possible to use a felt-like light-transmitting sheet, to bond both sheets with a heat-sealing film, and to further heat-welt a felt-like protective mat. The aeration / water permeability control sheet is heat-treated at a temperature of 80 ° C. or more to be shrunk to increase its fiber density, and this fiber density becomes 10000 dtex / inch or more in both the warp direction and the weft direction. This civil engineering sheet requires that the aeration / water permeability control sheet is heat-shrinked in 80 ° C. warm water, and it becomes difficult to bend as a whole due to the densification of the sheet. Complicated and expensive. Since the size of the civil engineering sheet is not specified, it can only be estimated that the size is 2 m wide × 20 m long.

  The present invention has been proposed in order to improve the above-described problems related to the conventional light shielding cover material for field packing materials, and is relatively light and easy to bend. An object of the present invention is to provide a light-shielding cover material for a long and wide field packing material that can be easily laid on the surface. Another object of the present invention is to provide a light-shielding cover material for a field packing material that has a higher transport efficiency when it is wound into a cylindrical shape and has a higher transportable number than a conventional truck.

The shading cover material for field packing materials according to the present invention is a large felt material having a length of 85 to 110 m, a width of 3.5 to 4 m, and a winding diameter of 100 to 115 cm. This light-shielding cover material is obtained by polymerizing a fiber wrap of the skin, an intermediate base fabric that is a woven fabric, and a fiber wrap of a base material including at least two types of short fibers having different fineness, and integrating the whole by only a needle punch. Forming a three-layer structure of a skin felt layer having a basis weight of 250 to 350 g / m ² , a base fabric, and a base felt layer having a basis weight being three times or more than that of the skin felt layer; The strength is 1500 N or more.

In the shading cover material according to the present invention, the skin felt layer is made of 7.8-33 dtex polyester fiber containing green or brown short fibers, a woven fabric made of polypropylene is used as an intermediate base fabric, and the base felt layer Preferably contains at least 5-10 dtex and 10-20 dtex polyester fibers. Also, the skin felt layer is basis weight 280~330g / ^{m 2,} the base fabric of intermediate basis weight is that 30 to 80 g / ^{m 2,} and the base felt layer is basis weight 800~1300g / ^{m 2,} The overall basis weight is preferably 1500 to 1700 g / m ² .

  In the light-shielding cover material of the present invention, it is preferable that one winding weight is 530 to 580 kg. When this shading cover material is used, 6 or more 10 ton trucks can be loaded, so that when the cover material is transported by one 10 ton truck, the entire packaging material at the temporary placement site can be covered by one transport.

  The light-shielding cover material according to the present invention is considerably wider and longer than the conventional light-shielding sheet, and because of its three-layer structure of non-heat treated felt with a base fabric, it is relatively light and easy to bend, Laying work on the surface of the field packing material becomes easy. The shading cover material of the present invention has a width and length of 85 to 110 m and a width of 3.5 to 4 m, so it is laid in a general temporary storage area having an area of about 20 m wide and about 85 m long. Then, in order to completely cover all the flexible container bags, it is only necessary to bond 8 sheets together in parallel with 7 welding wires, and the welding work for bonding the cover material becomes very small, The construction work of the material can be easily achieved.

  Since the shading cover material of the present invention has a diameter of 100 to 115 cm and a cylinder length of 3.5 to 4 m when wound in a cylindrical shape, it can be placed side by side on a truck bed and can be mounted on a 4 ton or 10 ton truck. The number that can be transported at a time is increased and transport efficiency is good. In the shading cover material of the present invention, since the winding weight of one piece is 500 to 600 kg, it can be transported about 4 at a time by 4 ton trucks and about 8 at a time by 10 ton trucks. The construction work on the flexible container of the storage place is easy, and when removing the flexible container bag, it is easy to remove the temporary container from the temporary storage place because it is lightweight.

It is a schematic sectional drawing which shows the temporary storage place of the flexible container bag covered with a light shielding sheet or a light shielding cover material. It is a schematic plan view which shows the state at the time of laying the conventional light-shielding sheet on a temporary storage place. It is a schematic sectional drawing which shows the light shielding cover material which concerns on this invention. It is a schematic plan view which shows the state at the time of laying the light-shielding cover material which concerns on this invention on a temporary storage place.

  The shading cover material 10 according to the present invention will be described with reference to the drawings. As shown in FIG. 3, the light shielding cover material 10 is formed by superposing the fiber wrap of the skin, the intermediate base fabric 12 and the fiber wrap of the base material, and the whole by needle punching. The skin felt layer 14, the base fabric 12, and the base felt layer 16 are formed by integrating. The light shielding cover material 10 is integrated only by the needle punch and is relatively flexible as a whole because no heat treatment is performed.

  The light shielding cover material 10 has a simple three-layer structure that is a skin felt layer 14, an intermediate base fabric 12, and a base felt layer 16. If necessary, a thin woven fabric is affixed to the front and back surfaces of the light shielding cover material, and the short fibers constituting both felt layers are oxidized to increase the light resistance and light shielding performance of the light shielding cover material 10. It is also possible to knead an agent or an ultraviolet absorber, or to apply or spray a resin solution such as an antioxidant on the surface.

The skin felt layer 14 has a basis weight of 250 to 350 g / m ^2, more preferably 280 to 330 g / m ² , and is thinner and lighter than the base felt layer 16 that serves as a reference for the elasticity and strength of the light shielding cover material 10. It takes a thing. At this time, if the basis weight of the skin felt layer 14 is less than 250 g / m ² , the skin becomes too thin and weak, while if the basis weight exceeds 350 g / m ² , the skin becomes too thick and difficult to handle.

  The skin felt layer 14 is preferably made of a polyester fiber of 7.8 to 33 dtex containing green or brown short fibers, and by adding a part or all of the green or brown short fibers, a green color that is easy to harmonize with the natural landscape. Alternatively, a brown shading cover material 10 is obtained. At this time, the green color harmonizes with the “green” of the vegetation, and the brown color harmonizes with the “soil” of earth and sand or rocks. Polyester fibers are preferably used for the skin felt layer 14 in terms of light resistance, tensile strength and cost. A skin film having a suitable outer surface or touch feeling can be further adhered to the surface of the skin felt layer 14 at room temperature or heat treatment depending on the place of use.

  When the fineness of the polyester fiber used in the skin felt layer 14 is less than 7.8 dtex, a problem is likely to occur in the durability of the skin felt layer 14. On the other hand, when the fineness exceeds 33 dtex, the skin felt layer 14 becomes hard. Laying workability is reduced. The polyester fiber may be partially bristled (recovered and recycled cotton) as desired, and may be partially added with other synthetic fibers such as polypropylene, acrylic and nylon. It is also possible to use recycled PET bottle fibers.

  The polyester fiber may be a cationic dyeable polyester fiber having a sulfonic acid group introduced in order to improve the color developability of the yarn, and the cationic dye is bonded to the dyed seat of the introduced sulfonic acid group. In this case, the polyester fiber can be dyed in vivid green or brown, which can be obtained only with a cationic dye, or can be dyed in two or more colors together with a disperse dye. The polyester fiber may be a latently crimped polyester fiber. Polyester fibers are manufactured by a melt spinning method in which a molten polymer is extruded from a pore die and cooled, so that two types of polymers are simultaneously extruded from the same pore to form a two-component composite fiber, The cross-sectional shape may be modified or hollowed.

  Latently crimped polyester fibers are produced by spinning two-component polyester fibers that differ in heat shrinkage during composite fiber formation. The latent crimped fiber is linear in the same manner as a normal yarn after spinning. When heat is applied to the obtained yarn, the yarn is crimped and becomes a slightly stretchable yarn. Further, by making the fiber hollow, it is possible to make a felt having a small apparent specific gravity and being bulky and light, and in the modified cross section, a triangular cross section can give a texture similar to silk. When the latently crimped polyester fiber is added to the felt layers 14 and 16, the stretchability and elastic recovery of the felt layer can be improved.

The intermediate base fabric 12 is a woven fabric such as plain weave, oblique weave, satin weaving, etc., and does not relate to light resistance, so it may be an inexpensive polypropylene woven fabric. The base fabric 12 preferably has a basis weight of 30 to 80 g / m ² . At this time, if the basis weight is less than 30 g / m ² , the base fabric is weakened. On the other hand, if the basis weight exceeds 80 g / m ² , the base fabric becomes thick and the light shielding cover material 10 is difficult to bend.

The substrate felt layer 16 includes at least two types of short fibers having different finenesses, and preferably has a basis weight of 3 times or more than the skin felt layer 14. The basis weight of the base felt layer 16 is usually 800 to 1300 g / m ² . At this time, if the basis weight is less than 800 g / m ² , the light shielding cover material 10 itself becomes weak because the substrate is too thin. On the other hand, if the basis weight exceeds 1300 g / m ² , the substrate becomes too thick and heavy to block the light. The laying workability of the cover material 10 is reduced.

  The base felt layer 16 includes polyester fibers of at least 5 to 10 dtex and 10 to 20 dtex, and includes two or more kinds of polyester fibers having different finenesses, thereby balancing the elasticity, bendability, and ease of handling of the light shielding cover material 10. Is adopted. Polyester fibers are preferably used for the base felt layer 16 in terms of tensile strength and cost. A skin film having suitable tactile sensation or the like can be further adhered to the back surface of the base felt layer 16 at room temperature or by heat treatment.

  In the substrate felt layer 16, the fineness of at least one polyester fiber is 5 to 10 dtex. At this time, if the fineness is 5 to 10 dtex, the felt layer 16 can be imparted with appropriate flexibility, and the light shielding cover material 10 is bent. It becomes easy. Further, the fineness of the other polyester fiber is 10 to 20 dtex. In this case, if the fineness is 10 d to 20 tex, the tensile strength of the felt layer 16 can be increased, and a certain durability of the light shielding cover material 10 can be imparted. This polyester fiber can be partially bristled (recovered recycled cotton) as desired, and in the same way as above, other synthetic fibers such as polypropylene, acrylic, nylon, etc. can be added, or PET bottles It is also possible to use recycled fibers.

In order to manufacture the light shielding cover material 10, as a base material wrap, the wrap is cross-wrapped with a cross wrapper to a predetermined thickness after carding, and after placing the intermediate base cloth 12, further as a skin wrap After carding, put the lap cross-wrapped with a cross wrapper. Next, the entire surface is entangled and integrated by needle punching the skin wrap, the base fabric, and the base material wrap with a needle punch machine from above and below. In this needle punching, for example, a normal rocking needle is used and the needle density is 100 to 350 needles / cm ² .

The obtained light shielding cover material 10 preferably has a basis weight of 1500 to 1700 g / m ² and a thickness of 7 to 15 mm after needle punching. The shading cover material 10 is often inferior in durability if the basis weight is less than 1500 g / m ² , and if it exceeds 1700 g / m ² , it becomes too heavy and the carrying work and the laying work become more severe. Further, if the thickness is less than 7 mm, the durability is often inferior like the basis weight, and if the thickness exceeds 15 mm, the quality is not improved, and it is thick and difficult to bend.

  The light shielding cover material 10 has a length of 85 to 110 m, a width of 3.5 to 4 m and a winding diameter of 100 to 115 cm, and is very wide and long as compared with a general light shielding sheet having a width of 2 m × a length of 20 m. . In the shading cover material 10, when the length is less than 85 m, there are many cases in which longitudinal welding is required when laying in the temporary storage place 2, while the length can be set to 100 m. If it exceeds 110 m, the winding diameter becomes too large, making it difficult to carry the truck. In addition, when the width is less than 3.5 m, the number of laterally bonded welds, that is, the weld length, often increases when laying in the temporary storage site 2, while when the width exceeds 4 m, the existing large needle punch Even machines cannot be manufactured.

  For example, the light shielding cover material 10 has a width of 3.7 m and a roll of about 90 m, and can be 100 m or more. If the shading cover material 10 is laid in the temporary storage area 2 having a width of about 20 m and a length of about 85 m, as shown in FIG. 4, it covers eight flexible container bags. Is simply bonded in parallel with the seven welding wires 18 (FIG. 4), and the number of weldings, that is, the welding length, is extremely reduced, and the construction work of the light shielding cover material 10 can be easily achieved.

  The light-shielding cover material 10 has a diameter of 100 to 115 cm when wound into a cylindrical shape. If the diameter is less than 100 m at this time, the length of the cover material is often shortened to 85 m or less, and the diameter is 115 m. If it exceeds, it will be close to the limit diameter that cannot be placed on the truck bed. When the winding diameter of the light-shielding cover material is 100 to 115 cm, two can be placed side by side on the loading platform of a truck with a width of more than 2 m, and a large number can be transported at a time by a 4 ton or 10 ton truck, thereby improving the transport efficiency. Get better.

  In the light-shielding cover material 10, since one roll-up weight is 530 to 580 kg, about 4 can be transported at a time by 4 ton trucks and about 8 at a time by 10 ton trucks. When the light shielding cover material 10 having a three-layer structure is used, the construction work is easy on the flexible container in the temporary storage area because it is lighter than the laying area. The removal work is easy.

  When the felt layer is made of polyester fiber or the like by interposing the base fabric 12 between the felt layers 14 and 16, the light shielding cover material 10 has a tensile strength of 1500 N or more and is not easily broken during use, and has a predetermined breaking strength and dimensional stability. Retain sex. Further, even if the light shielding cover material 10 is comparatively light and thin as a field packing material sheet, the light shielding ratio is 95% or more, so it prevents deterioration of contaminated soil in the flexible container bag, and under normal use conditions. Wear, damage, deterioration, etc. are reduced.

Next, this invention is demonstrated based on an Example. In FIG. 2, 25% by weight of black polyester fiber having a fineness of 17 dtex and 75% by weight of green or brown polyester fiber having a fineness of 17 dtex are used as the fiber wrap of the epidermis, and carding is performed through a card machine after blending both fibers. After that, the entire weight is cross-superposed with a cross wrapper to determine a basis weight of 300 g / m ² . Also, as a fiber wrap of the base material, 40% by weight of white polyester fiber having a fineness of 17 dtex, 30% by weight of black polyester fiber having a fineness of 6.6 dtex, and 30% by weight of miscellaneous polyester fiber are used. After blending, carding is performed, and the whole is cross-overlaid to determine a basis weight of 1200 g / m ² .

Further, a woven fabric made of 100% polypropylene is used as the base fabric 12. The basis weight of the base fabric 12 is 58 g / m ² .

Next, the base fabric 12 and the skin fiber wrap are overlaid on the fiber wrap of the base material, and the fibers are entangled by needle punching from above and below with a large needle punch machine to integrate the whole. . As shown in FIG. 3, the obtained light-shielding cover material 10 has a three-layer structure having a skin felt layer 14, an intermediate base fabric 12, and a base felt layer 16. The shading cover material 10 has a basis weight of 1588 g / m ² and a thickness of 10 mm. The light shielding cover material 10 is integrated only by a needle punch and is a non-heat-treated product, so that the whole is relatively flexible.

  The light shielding cover material 10 has a width of 3.7 m × 90 m, a winding diameter of 110 cm, and a winding weight of 540 kg. The shading cover material 10 is laid in a temporary storage place for test construction having a width of about 20 m × length of about 85 m.

  In order to lay the light shielding cover material 10 on the entire surface of the temporary storage place 2, it is only necessary to bond the eight light shielding cover materials 10 in parallel with the seven welding wires 18 (FIG. 4). It is short and advantageous. In the case of the conventional light shielding sheet, the construction work is completed in about three and a half days. However, in the case of the light shielding cover material 10, the construction work is completed in two and a half days, and the construction time for one day can be shortened. For this reason, in the decontamination work site of contaminated soil, the work efficiency including the laying of the light shielding cover material 10 is greatly improved.

  As in Example 1, a polyester fiber felt and a polypropylene base fabric are used, and the whole is integrated by needle punching. As shown in FIG. 3, the obtained light-shielding cover material has a three-layer structure including a skin felt layer 14, an intermediate base fabric 12, and a base felt layer 16, and the basis weight of the felt layer 16 is larger than that of Example 1. Somewhat more. The physical properties of the light shielding cover material are as shown in Table 1 below.

  In order to lay this light shielding cover material on the entire surface of a general temporary storage, only eight light shielding cover materials are bonded together in parallel with seven welding wires, and the welding length is very short as a whole. With this shading cover material, the construction work is completed in two and a half days, the construction time for one day can be shortened, and it is highly evaluated in the field of decontamination work.

DESCRIPTION OF SYMBOLS 10 Light shielding cover material 12 Base fabric 14 Skin felt layer 16 Base material felt layer

Claims (4)

It is a large shading cover material having a length of 85 to 110 m, a width of 3.5 to 4 m, and a winding diameter of 100 to 115 cm, and has at least two kinds of skin wraps, an intermediate base fabric that is a woven fabric, and different finenesses. By polymerizing the fiber wrap of the base material containing short fibers and integrating the whole by only a needle punch, the basis weight is 250 to 350 g / m ² , and the basis weight is more than the skin felt layer. A light-shielding cover material for a field packaging material that forms a three-layer structure of a base felt layer that is three times or more and has a light-shielding rate of 95% or more and a tensile strength of 1500 N or more.   The skin felt layer is made of 7.8-33 dtex polyester fiber containing green or brown short fibers, polypropylene woven fabric is used as an intermediate base fabric, and the base felt layer is at least 5-10 dtex and 10-20 dtex The light-shielding cover material of Claim 1 containing the polyester fiber of this. Skin felt layer is basis weight 280~330g / ^{m 2,} the base fabric of the intermediate is a basis weight of 30 to 80 g / ^{m 2,} and the base felt layer has a basis weight was 800~1300g / ^{m 2,} overall The light shielding cover material according to claim 1, wherein the basis weight is 1500 to 1700 g / m ² .   One winding weight is 530 to 580 kg, and 6 or more can be loaded on a 10 ton truck at the same time. When the cover material is conveyed by one 10 ton truck, all the packaging materials at the temporary placement site can be transferred by one conveyance. The light shielding cover material according to claim 1, which can be covered.

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