JP2003291817A - Cover for cargo - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cover for a cargo having large mechanical strength, excellent durability, and excellent handling property and capable of covering the cargo. <P>SOLUTION: This cover for the cargo is constituted in such a way that a ceiling part and a peripheral side part provided continuously with a peripheral fringe of the ceiling part and suspending are formed by a laminated sheet composed of a clothlike body composed of thermoplastic synthetic resin filament body oriented uniaxially and a thermoplastic synthetic resin layer laminated on its one face or both faces, an opening part extending in the longitudinal direction is formed in a peripheral side part, and a zipper in which a thermoplastic synthetic resin sheet is sewn on an engaging piece mounting basic cloth is heat-bonded on the laminated sheet on both sides of the opening part through the thermoplastic synthetic resin sheet. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cargo cover, and more particularly to a cargo cover having high mechanical strength and excellent durability, which is suitable for protecting a cargo loaded on a transportation vehicle.

[0002]

2. Description of the Related Art In recent years, transportation of baggage when moving at airports, movement of goods in supermarkets, etc. have been carried out by loading on handcarts such as wagons and carts.
When cargo is loaded, vibrations when moving the car may cause the cargo to collapse and fall.If the cargo falls, not only damage to the cargo but also personal injury may be prevented. Action is needed. In addition, when holding the luggage for a while, it is necessary to take measures to prevent the loss of the luggage.

For this purpose, it is effective to cover the load, but it is required that the load is tough and has excellent durability and that it is lightweight and not bulky. In addition, baggage, products in the store,
Since the shape is different and not a standard one, the cargo appearance is not constant accordingly. For this reason, in order to cover the entire load with the cover completely, it is necessary to have a structure that is excellent in handleability and can be smoothly covered without being caught by the load. It is also necessary to be able to see through the internal cargo.

As a cover which is excellent in durability, lightweight and not bulky, a thermoplastic synthetic resin sheet such as polyolefin, particularly a thermoplastic synthetic resin sheet reinforced with a cloth-like body made of thermoplastic synthetic resin is used. It is effective to have a container shape in which the ceiling portion and the peripheral side portion are formed.

However, when the cover is formed in the shape of a box, when the cover is put on the load, the upper part of the cover collapses and is folded over the load, so that the cover is folded.
The folds are caught in the load, making it difficult to cover the load. Therefore, the material or structure of the inner surface of the cover needs to be taken into consideration so that the inner surface material or structure of the cover is slippery with respect to the load when the load is put on.

Further, it is desirable that the cover can easily cover the load and can be tightened so that the load does not vary. In order to achieve the object, it is considered that the peripheral side portion of the cover is cut open in the longitudinal direction so that the opening can be opened and closed, and it is effective to use a fastener for opening and closing.

However, in the fastener, the engaging element attachment base cloth for attaching the engaging element is formed of polyester fiber or polyamide fiber, and it is difficult to join with a thermoplastic synthetic resin sheet such as polyolefin used for covering. is there. A common sewing method is to make holes in the cover sheet. However, since the thermoplastic synthetic resin sheet is vulnerable to tearing and the tear easily expands when a cut edge is formed, it is not desirable to make a hole.

For these reasons, a practical cargo cover that is tough, has excellent durability, and is easy to handle has not yet been developed.

[0009]

SUMMARY OF THE INVENTION The present invention provides a cargo cover having a large mechanical strength, an excellent durability, a good handleability, and an easy load.

[0010]

DISCLOSURE OF THE INVENTION The present invention has been made as a result of earnest studies for achieving the above object, and is a cloth-like body made of a uniaxially stretched thermoplastic synthetic resin filament and one side thereof. Alternatively, a laminated sheet composed of thermoplastic synthetic resin layers laminated on both sides forms a ceiling portion and a peripheral side portion that is connected to the peripheral edge of the ceiling portion and hangs down, and an opening portion that extends in the vertical direction is formed on the peripheral side portion. A fastener, in which a thermoplastic synthetic resin sheet is sewn to an engaging element attachment base fabric, is heat bonded to the laminated sheets formed on both sides of the opening portion via the thermoplastic synthetic resin sheet. It is intended to provide a cargo cover.

Further, according to the present invention, the cargo cover in which the thermoplastic synthetic resin layer constituting the laminated sheet is made of polyolefin, and the thermoplastic synthetic resin filament and the thermoplastic synthetic resin layer constituting the laminated sheet are made of polyolefin. The cargo cover and polyolefin made of ethylene
The cargo cover, which is an olefin copolymer, and
It is intended to provide the cargo cover as described above, wherein the polyolefin is an ethylene / α-olefin copolymer polymerized by using a metallocene catalyst.

Further, according to the present invention, the thermoplastic synthetic resin layer forming the inner surface of the laminated sheet on the peripheral side and the thermoplastic synthetic resin sheet sewn to the fastener base cloth are made of the same kind of thermoplastic synthetic resin. A cargo cover, the above-mentioned cargo cover which is a woven fabric, a cross-bonded cloth, a knitted fabric or a non-woven fabric of a thermoplastic synthetic resin filament in which the cloth body is uniaxially stretched, and a thermoplastic composition constituting the cloth body. The resin filament is provided with the cargo cover, at least the surface of which is formed of a propylene polymer polymerized by using a metallocene catalyst.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1, a cargo cover 1 according to the present invention comprises a ceiling portion 10 and a peripheral side portion 11 which is connected to a peripheral edge of the ceiling portion 10 and hangs down. Is formed by the laminated sheet 5, which is shown in FIG.
As shown in (A), a cloth-like body 3 made of a thermoplastic synthetic resin filament 2 and a thermoplastic synthetic resin layer 4 laminated on one side or both sides thereof.

In the present invention, the cloth-like body is a generic term for a flexible sheet-like body composed of the filamentous body 2, and the filamentous body 2
Uniaxially stretched yarn, tape, split yarn, monofilament, multifilament, short fiber,
It includes long fibers and the like.

The filament 2 may be a single layer of a crystalline thermoplastic synthetic resin, but it is a laminate having a joining layer formed on one or both sides of the thermoplastic synthetic resin as a base layer. be able to.

For example, as shown in FIG. 6 (A), a single layer of crystalline thermoplastic synthetic resin can be used, and as shown in FIG. 6 (B), the bonding layer 7 is a base layer 6. The structure can be laminated on one side of FIG.
As shown in (C), it is possible to have a structure in which the bonding layers 7 are laminated on both surfaces of the base layer 6. Alternatively, a sheath core structure may be used as shown in FIG. 6D and a side-by-side method may be used as shown in FIG. 6E. Among them, Figure 6
As shown in (C), it is desirable that the bonding layers 7 made of a low-melting thermoplastic synthetic resin are laminated on both surfaces of the tape-shaped base layer 6.

As the thermoplastic synthetic resin forming the base layer 6 of the linear body 2 of the filament 2 or the laminated body, a resin having a large stretching effect, generally a crystalline thermoplastic synthetic resin is desirable, and high density polyethylene, Polypropylene, ethylene
Polyolefin such as propylene copolymer, polyester such as polyethylene terephthalate and polybutylene terephthalate, polyamide such as nylon 6, nylon 66 and the like can be used.

Among them, polyolefins such as high-density polyethylene and polypropylene are desirable from the viewpoint of workability and economy,
In particular, polypropylene in which at least the bonding layer 7 is polymerized using a metallocene catalyst and linear low density polyethylene are preferably used. By using polypropylene polymerized using a metallocene catalyst and linear low-density polyethylene, the cargo cover 1 having excellent transparency can be obtained.

The bonding layer 7 is formed after the filament 2 is formed into a cloth.
The filaments 2 are joined to each other or the cloth 3 and the thermoplastic synthetic resin layer 4 are joined to each other. The melting point of the thermoplastic synthetic resin constituting the base layer 6 is 10 ° C or higher, preferably 15 ° C or higher. A thermoplastic synthetic resin excellent in low heat fusion property is used.

Specifically, polyolefins such as polyethylene, polypropylene and ethylene / propylene copolymers, polyesters such as polyethylene terephthalate and polybutylene terephthalate, nylon 6, nylon 66
Polyamide, etc. can be used, and a thermoplastic synthetic resin having a melting point lower than that of the base layer is selected in relation to the thermoplastic synthetic resin of the base layer.

The filament 2 is preferably made of a thermoplastic synthetic resin containing a unit derived from a polar monomer.
As the thermoplastic synthetic resin containing a unit derived from a polar monomer, a homopolymer of a polar monomer or a copolymer of a polar monomer and another monomer can be used. Can be used alone or in combination with other synthetic resins.

When the modified polyolefin is added to the polyolefin, the modified polyolefin is added in an amount of about 0.5 to 20 parts by weight, more preferably about 1.0 to 15 parts by weight, based on 100 parts by weight of the polyolefin. To be done.

Various additives can be added to the thermoplastic synthetic resin used as the base layer 6 or the bonding layer 7 depending on the purpose.

Specifically, antioxidants such as phenol type, organic phosphite type, organic phosphorus type such as phosnite, and thioether type; light stabilizers such as hindered amine type; benzophenone type, benzotriazole type, benzoate type, etc. UV absorbers; antistatic agents such as nonionic, cationic, anionic, etc .; dispersants such as bisamide type, wax type, organometallic salt type, etc .; chlorine scavengers such as carboxylic acid salt type of alkaline earth metal salt; amide -Based, wax-based, organometallic salt-based, ester-based lubricants; hydrazine-based, amine acid-based, etc. metal deactivators; bromine-containing organic-based, phosphoric acid-based, antimony trioxide, magnesium hydroxide, red phosphorus, etc. Combustion agents; organic pigments; inorganic pigments; inorganic fillers, organic fillers; inorganic materials such as metal ion type and organic antibacterial agents.

These additives are appropriately combined and compounded in any step of manufacturing the material composition of the base layer 6 and the bonding layer 7. The additives may be prepared by mixing the additives at a predetermined ratio using a kneading device such as a conventionally known twin screw extruder, Banbury mixer, kneader mixing roll, etc. A so-called masterbatch having a concentration may be prepared and used by diluting it.

When a laminate is used as the filament 2,
As a means for molding a laminated film which is a molding material for a laminated flat yarn or a split yarn, a film which becomes the base layer 6 and a film which becomes the bonding layer 7 are formed in advance, and the obtained film is subjected to a dry lamination method or a heat treatment. A method of forming a multilayer using a laminating method, a method of coating the surface of the film to be the base layer 6 with a thermoplastic synthetic resin to be the bonding layer 7, and an extrusion lamination of the bonding layer 7 to the film to be the base layer 6 previously formed. The method may be appropriately selected from known means such as extrusion molding as a laminated film by a multi-layer coextrusion method, but the ease and cost of molding, and the adhesiveness and light transmission between the layers of the product. In terms of, the base layer 6 and the bonding layer 7 are formed by the multi-layer coextrusion method.
A method of obtaining the laminated body of 1 in one step is desirable. For the sheath core structure or the side-by-side structure, the coextrusion method is generally used.

As means for stretching the filamentous body 2, the film to be the base layer 6 is uniaxially stretched, and then the thermoplastic synthetic resin to be the bonding layer 7 is laminated, and this is slit into a tape shape. Alternatively, the base layer 6 and the bonding layer 7 may be used.
It can also be obtained by uniaxially stretching before or after slitting the laminated film in which is laminated.

The stretching can be carried out by stretching with a hot roll, stretching with a hot plate, stretching with a hot air oven, or the like. The stretching ratio is usually about 3 to 10 times.

When using a uniaxially stretched flat yarn,
The thickness is not particularly limited and can be arbitrarily set according to the purpose, but generally, it is in the range of 75 to 2000 decitex and the yarn width of 0.3 to 10 mm. The uniaxially stretched flat yarn thus obtained can be made into split yarns by making small cuts in the longitudinal direction. By using split yarn, the texture and feel can be improved.

As the filaments 2, stretched monofilaments or multifilaments can be used, and short fibers can be used when forming a nonwoven fabric. It is also possible to use twisted yarn obtained by spinning short fibers.

The filament 2 such as the uniaxially stretched tape thus obtained is woven into a plain weave, a twill weave, a twill weave, a ridge weave, a double weave, a dummy weave, or the like, as shown in FIG. As shown in FIG. 5, a plurality of filaments 2a are arranged side by side, and the filaments 2b are arranged so as to intersect with each other, and the cloth-like body 3 which is a cross-bonding cloth (sof) is formed by joining the intersections. It can be used, and can be made into the cloth-like body 3 by knitting in vertical knitting, weft knitting, Russell knitting, tricot knitting, and the like.

The cloth-like body 3 is joined at the intersections of the filaments 2 as required. As a method of joining the intersections of the filaments 2, a hot melt type adhesive can be used for bonding, and when the filaments 2 have a bonding layer 7, they are bonded by thermocompression bonding using a heat roll. can do. Also,
As the cloth 3, spunbonded nonwoven fabric, needlebonded nonwoven fabric, or split fiber nonwoven fabric can be used.

A thermoplastic synthetic resin layer 4 is formed by laminating a thermoplastic synthetic resin on the cloth-like body 3 made of the filamentous body 2 thus obtained.

The thermoplastic synthetic resin forming the thermoplastic synthetic resin layer 4 includes high-density polyethylene, low-density polyethylene, linear low-density polyethylene, polypropylene, ethylene-propylene copolymer, polyolefin such as polybutene, polyethylene terephthalate, poly Polyester such as butylene terephthalate, nylon 6, nylon 66
Polyamide and the like can be used. Among them, polyolefin is preferable, and linear low density polyethylene,
Linear low-density polyethylene polymerized using a metallocene catalyst is particularly preferable.

By using linear low-density polyethylene, particularly linear low-density polyethylene polymerized by using a metallocene catalyst, the adhesive strength of the heat-bonded portion is excellent, and peeling is possible even when external stress acts. It is possible to obtain sufficient covering property.

The metallocene catalyst comprises a metallocene (component a) composed of cyclopentadienyl or its derivative and a transition metal compound, and a cocatalyst (component b) for activating the component a. For example, compounds represented by the following general formulas (1) and (2) can be used as

Component (a-1) (C ₅ H _{5 -a} R ¹ _a ) (C ₅ H _{5 -b} R ² _b ) MXY (1) Component (a-2) Q (C ₅ H _{4 -a} R ¹ _a ) (C ₅ H _{4 -b} R ² _b ) MXY (2)

In the above general formulas (1) and (2), Q
Represents a bonding group bridging two conjugated five-membered ring ligands.
M represents a transition metal of Groups 4 to 6 of the periodic table, and among them, titanium, zirconium and hafnium are preferable.

X and Y are each independently hydrogen,
Halogen, hydrocarbon group having 1 to 20 carbon atoms, 1 to 2 carbon atoms
The oxygen-containing hydrocarbon group of 0, a nitrogen-containing hydrocarbon group of 1 to 20 carbon atoms, a phosphorus-containing hydrocarbon group of 1 to 20 carbon atoms or a silicon-containing hydrocarbon group of 1 to 20 carbon atoms is shown.

R ¹ and R ² are each independently a hydrocarbon group having 1 to 20 carbon atoms, halogen, a hydrocarbon group having 1 to 20 carbon atoms, a halogen-containing hydrocarbon group, an alkoxy group, an aryloxy group or a silicon-containing hydrocarbon group. , A phosphorus-containing hydrocarbon group, a nitrogen-containing hydrocarbon group or a boron-containing hydrocarbon group. Also,
Two adjacent R ^1's or two R ^2's may be bonded to each other to form a C _{4 to} C ₁₀ ring, for example, to form a fluorenyl group, an indenyl group or an azulenyl group. a and b are integers that satisfy 0 ≦ a ≦ 5 and 0 ≦ b ≦ 5.

The bonding group Q bridging between the two conjugated five-membered ring ligands is, for example, an alkylene group, an alkylidene group,
Examples thereof include a silylene group and a germylene group. These may have a hydrogen atom substituted with an alkyl group, halogen or the like.

These components a are combined with a cocatalyst component (component b) such as alumoxane, ion-exchangeable layered silicate and the like, and then subjected to the polymerization step.

If desired, various additives may be added to these thermoplastic synthetic resins. Specifically, phenol-based, organic phosphite-based, organic phosphorus-based such as phosnite, and thioether-based. Antioxidants such as; light stabilizers such as hindered amines; UV absorbers such as benzophenone, benzotriazole and benzoate;
Antistatic agents such as nonionic, cationic and anionic antistatic agents;
Dispersants such as bisamide-based, wax-based, organic metal salt-based dispersants;
Chlorine scavengers such as carboxylic acid salts of alkaline earth metal salts;
Amide-based, wax-based, organometallic salt-based, ester-based lubricants; hydrazine-based, amine acid-based metal deactivators; bromine-containing organic-based, phosphoric acid-based, antimony trioxide, magnesium hydroxide, red phosphorus, etc. Flame retardants; organic pigments; inorganic pigments; inorganic fillers, organic fillers; inorganic materials such as metal ion type, organic antibacterial agents and the like.

The cloth-like body 3 and the thermoplastic synthetic resin layer 4 can be adhered to each other by a means known per se, and a sheet of the thermoplastic synthetic resin is laid on the cloth-like body 3 and a hot roll is used. It can also be carried out by a method of thermocompression bonding, a method of extruding a thermoplastic synthetic resin into a film and laminating by extrusion, or a method of adhering a sheet of a thermoplastic synthetic resin with an adhesive such as a hot melt agent.

The laminated sheet 5 thus obtained forms the cargo cover 1. As shown in FIG. 1, the cargo cover 1 includes a ceiling portion 10 and a peripheral side portion 11 that is continuously provided on the peripheral edge of the ceiling portion 10 and that is hung downward to surround the cargo. It Although the sizes of the ceiling portion 10 and the peripheral side portion 11 do not limit the present invention, the ceiling portion 1
The length of each side of 0 is generally the same as the length of each side of the top surface of the loaded cargo, generally, the length of each side of the carrier 12.

The thermoplastic synthetic resin forming the laminated sheet 5 is preferably laminated on both sides of the cloth 3, and each layer is generally 20 to 300 μm, preferably 3 μm.
It is set to 0 to 200 μm. At this time, the thermoplastic synthetic resin laminated on the inner surface side of the laminated sheet 5a of the ceiling portion 10 is the same kind as the thermoplastic synthetic resin laminated on the outer surface side of the laminated sheet 5b of the peripheral side portion 11. By using it, the laminated sheet 5a of the ceiling portion 10 and the laminated sheet 5b of the peripheral side portion 11 can be easily joined, which is a desirable method.

In the present invention, the thermoplastic synthetic resin of the same kind means a thermoplastic synthetic resin having the same main monomer constituting the thermoplastic synthetic resin.

As shown in FIG. 2, the laminated sheet 5a forming the ceiling portion 10 and the laminated sheet 5b forming the peripheral side portion 11 have the peripheral side portion 11 formed on the periphery of the laminated sheet 5a forming the ceiling portion 10. The side edges of the laminated sheet 5b are joined together to form a box shape.

The laminating sheet 5a and the laminating sheet 5b can be joined by a method known per se, such as sewing, joining by heat fusion, joining using an adhesive or a pressure sensitive adhesive, and joining using a hot melt agent. Can be done, among other things,
A heat fusion method such as hot air sealing, hot plate sealing, ultrasonic sealing, high frequency sealing, or impulse sealing is desirable.

The laminated sheet 5 forming the peripheral side portion 11
A vertical opening 13 is formed in b, and the fastener 1
5 is attached.

As shown in FIG. 3, in the fastener 15, a thermoplastic synthetic resin sheet 18 is joined to the upper surface of an engaging element attachment base cloth 17 for fixing the engaging element 16 of the fastener using a sewing thread 19. The engaging element attachment base cloth 17 and the thermoplastic synthetic resin sheet 18 are joined by sewing.

As the thermoplastic synthetic resin forming the thermoplastic synthetic resin sheet 18, the laminated sheet 5b of the peripheral side portion 11 is used.
It is preferable to use the same kind of thermoplastic synthetic resin as the thermoplastic synthetic resin forming the inner surface of the. Here, the same kind of thermoplastic synthetic resin means as described above.

The fastener 15 sewn with the thermoplastic synthetic resin sheet 18 is heat-welded to the edges of the laminated sheet 5 on both sides of the opening 13 to form the cargo cover 1. The opening portions 13 are provided on both sides of one side of the cargo cover 1 in the figure, but the formation position of the opening portion 13 can be arbitrarily selected according to the purpose, and any one of the ridges in the vertical direction can be selected. It may be provided at a place, or may be provided at the center of one surface of the peripheral side portion 11. Laminated sheet 5 formed in a box shape
The cargo cover 1 of the present invention is obtained by heat-sealing the fastener 15 to the opening 13 of b.

When the cargo cover 1 of the present invention is used to protect the cargo, the cargo cover 1 is put on the cargo with the fasteners 15 opened, and then the lower portion of the peripheral side portion 11 is held to stack the both sides of the opening portion 13. By pulling the sheet and closing the fastener, the load can be tightened to prevent the load from collapsing, and the load can be protected from dust and the like.

[0055]

Since the cargo cover of the present invention uses the laminated sheet in which the thermoplastic synthetic resin layer is laminated on the surface of the cloth-like body,
It is tough, and has excellent mechanical strength and durability. When it is placed on a load, it slips well, and it is easy to handle.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a cargo cover of the present invention.

FIG. 2 is a vertical sectional view showing a joint portion of the synthetic resin sheet of the present invention.

FIG. 3 is a vertical cross-sectional view showing a fastener mounting portion.

FIG. 4 is a plan view showing a laminated sheet, and FIG.

FIG. 5 is a vertical sectional view showing another example of a laminated sheet.

FIG. 6 is a vertical cross-sectional view showing an example of a linear body.

[Explanation of symbols]

1: Cargo cover 2: Striatum 3: cloth-like body 4: Thermoplastic synthetic resin layer 5: Laminated sheet 6: Base layer 7: Adhesive layer 10: Ceiling 11: Peripheral side 12: Carrier 13: Opening part 15: Fastener 16: Engagement element 17: Engagement attachment base cloth 18: Thermoplastic synthetic resin sheet

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3D050 AA01 BB04 BB10 EE08 EE15                 3E086 AA12 AB01 AC05 AC07 AD29                       BA04 BA15 BA18 BA28 BA33                       BB51 BB52 BB85 CA40                 4F100 AK01A AK01B AK01C AK03A                       AK03B AK03C AK62A AK62B                       AK62C AK63A AK63B AK63C                       BA02 BA03 BA06 BA07 BA10B                       BA10C DG12A DG13A DG15A                       EJ37A GB32 JB16A JB16B                       JB16C JK01 JL05

Claims (8)

[Claims] 1. A ceiling sheet and a peripheral edge of a ceiling portion are formed by a laminated sheet comprising a cloth-like body made of a uniaxially stretched thermoplastic synthetic resin filament and a thermoplastic synthetic resin layer laminated on one or both surfaces thereof. A peripheral side portion that is continuously provided and hangs down is formed, and an opening portion that extends in the longitudinal direction is formed on the peripheral side portion, and the laminated sheet on both sides of the opening portion includes the thermoplastic synthetic resin sheet on the engaging element attachment base cloth. A cargo cover characterized in that a sewn fastener is heat-bonded through the thermoplastic synthetic resin sheet. 2. The cargo cover according to claim 1, wherein the thermoplastic synthetic resin layer constituting the laminated sheet is made of polyolefin. 3. The cargo cover according to claim 1 or 2, wherein the thermoplastic synthetic resin filaments and the thermoplastic synthetic resin layer constituting the laminated sheet are made of polyolefin. 4. The cargo cover according to claim 2, wherein the polyolefin is an ethylene / α-olefin copolymer. 5. The cargo cover according to claim 2, wherein the polyolefin is an ethylene / α-olefin copolymer polymerized using a metallocene catalyst. 6. The thermoplastic synthetic resin layer constituting the inner surface of the laminated sheet on the peripheral side and the thermoplastic synthetic resin sheet sewn to the fastener base cloth are made of the same kind of thermoplastic synthetic resin. The cargo cover described in any of the above. 7. The cargo cover according to claim 1, wherein the cloth-like body is a uniaxially stretched thermoplastic synthetic resin filament woven cloth, cross-jointed cloth, knitted cloth or non-woven cloth. 8. The thermoplastic synthetic resin filaments forming the cloth-like body is formed by a propylene-based polymer polymerized by using a metallocene catalyst at least on its surface. The cargo cover described.