AU2020204201A1 - High strength ecological grass planting bag for engineering use - Google Patents

Abstract

HIGH STRENGTH ECOLOGICAL GRASS PLANTING BAG FOR ENGINEERING USE A high strength ecological grass planting bag 5 includes a bag body (2) having a bag mouth (22) and including a plurality of warp and weft yarn groups (23, 24, 24'). Each warp yarn group (23) includes at least one warp round yarn (231). Each weft yarn group (24, 24') includes at least one weft round yarn (241) and 10 at least one first weft flat yarn (242). Two warp yarn groups (23) cooperate with a corresponding weft yarn group (24, 24') to define a hole (A) for plant growth. The at least one first weft flat yarn (242) has a residual strength retention rate lower than that of the 15 at least one weft round yarn (241). A drawstring (3) is disposed on the bag body (2) in proximity to the bag mouth (22) for closing and opening the bag mouth (22) (FIG. 2) Lit?

Description

Lit?

HIGH STRENGTH ECOLOGICAL GRASS PLANTING BAG FOR ENGINEERING USE

This application claims priority from Taiwanese

patent application 108122922, filed 28 June 2019, the

entire content of which is incorporated by reference.

The disclosure relates to a bag, more particularly

to a high strength ecological grass planting bag for

engineering use.

A conventional grass planting bag for ecological

remediation needs, such as water and soil conservation,

slope protection, etc., is usually made by interweaving

a plurality of polyethylene flat yarns 1, as shown in

FIG. 1, and is filled with soil and plant seeds for the

purpose of planting and greening. Since the structural

strength of the flat yarns 1 is low, the conventional

grass planting bag is easily damaged during

construction or transport, so that the grass planting

bag must be repeatedly repaired or increase the

thickness or width of the flat yarns 1 to overcome the

damage thereof. However, this kind of reparation method

is not easy for plant growth, so that it is difficult

to achieve the purpose of growing plants. Further, this

structure also has the disadvantage of short service

life. Often when the plant has not grown enough to

conserve water and soil, because the grass planting bag

is damaged, it is easy to be washed away by rain or erosion, thereby resulting in failure to meet the expected ecological remediation needs.

Therefore, an object of the present disclosure is

to provide a high strength ecological grass planting

bag for engineering use that can alleviate at least one

of the drawbacks of the prior art, and/or at least

provide the public with a useful choice.

Accordingly, a high strength ecological grass

planting bag of this disclosure comprises a bag body

and a drawstring. The bag body defines a filling space

configured for receiving soil or other filling

materials, and has a bag mouth communicating with the

filling space. The bagbodyincludes aplurality ofwarp

yarn groups extending in a warp direction and spaced

apart from each other in a weft direction, and a

plurality of weft yarn groups extending in the weft

direction and spaced apart from each other in the warp

direction. Each warp yarn group includes at least one

warp round yarn. Each weft yarn group includes at least

one weft round yarn and at least one first weft flat

yarn. Two of the warp yarn groups cooperate with the

at least one weft round yarn and the at least one first

weft flat yarn of a corresponding one of the weft yarn

groups to define a hole for plant growth. The at least

one first weft flat yarn has a residual strength

retention rate lower than that of the at least one weft

round yarn such that the at least one first weft flat yarn ages and decomposes ahead of the at least one weft round yarn to thereby expand the hole. The drawstring is disposedon the bagbodyinproximity to the bagmouth for closing and opening the bag mouth.

On a cross section perpendicular to the weft

direction, the at least one weft round yarn has a yarn

diameter or width ranging from 0.15 mm to 0.35 mm, and

a fineness ranging from 400 deniers to 1000 deniers.

On the cross section perpendicular to the weft

direction, the at least one first weft flat yarn has

a width ranging from1mm to 5 mm, and a fineness ranging

from 700 deniers to 2600 deniers.

The effect of at least preferred embodiments of the

present invention resides in that through the at least

one first weft flat yarn, a good structural strength

can be provided during transportation and stacking.

Further, at least one first weft flat yarn ages and

decomposes after a period of time to thereby provide

a space for plant growth.

Other features and advantages of the disclosure will

become apparent in the following detailed description

of the embodiments with reference to the accompanying

drawings, of which:

FIG. 1 is a partial schematic view of a conventional

grass planting bag;

FIG. 2 is a schematic view of a high strength

ecological grass planting bag according to the first embodiment of the present disclosure;

FIG. 3 is a view similar to FIG. 2, but with the first

embodiment being filled with a filling material and a

bag mouth being closed;

FIG. 4 is a partially enlarged sectionalview of the

first embodiment;

FIG. 5 is a partially enlarged schematic view of the

first embodiment;

FIG. 6 illustrates the first embodiment after being

exposed to light for a period of time;

FIG. 7 is a view similar to FIG. 5, but illustrating

an alternative form of each weft yarn group;

FIG. 8 is a partialenlarged schematicview of a high

strength ecologicalgrass plantingbag according to the

second embodiment of the present disclosure; and

FIG. 9 is a view similar to FIG. 8, but illustrating

an alternative form of each weft yarn group.

Before the present disclosure is described in

greater detail with reference to the accompanying

embodiments, it should be noted herein that like

elements are denoted by the same reference numerals

throughout the disclosure.

Referring to FIGS. 2 and 3, a high strength

ecological grass planting bag for engineering use

according to the first embodiment of the present

disclosure includes a bag body 2 and a drawstring 3.

The bag body 2 defines a filling space 21 for receiving soil or other filling materials, and has a bag mouth 22 communicating with the filling space 21.

The bag body 2 includes a plurality of warp yarn groups

23 extending in a warp direction (X) and spaced apart

from each other in a weft direction (Y), and a plurality

of weft yarn groups 24 extending in the weft direction

(Y) and spaced apart from each other in the warp

direction (X).

The drawstring 3 is disposed on the bag body 2 in

proximity to the bag mouth 22 for closing and opening

the bag mouth 22.

In this embodiment, the bag body 2 is formed by plain

weave, but is not limited thereto. The bag body 2 may

be formedby twillweave, satinweave, etc. Thebagmouth

22 is located on the warp direction (X).

In actual practice, plant seeds and soil (or other

fillers) are filled in the filling space 21 of the bag

body 2, after which the drawstring 3 is pulled to close

the bag mouth 22, thereby forming a filling state of

the bag body 2, as shown in FIG. 3.

Referring to FIGS. 4 and 5, in combination with FIG.

2, each of the warp yarn groups 23 includes a warp round

yarn 231, and each of the weft yarn groups 24 includes

a weft round yarn 241 and a first weft flat yarn 242.

Each two warp yarn groups 23 cooperate with the weft

round yarn 241 and the first weft flat yarn 242 of a

corresponding one of the weft yarn groups 24 to define a hole (A) for plant growth.

In this embodiment, each of the warp round yarn 231,

the weft round yarn 241 and the first weft flat yarn

242 is made of polyethylene (PE). On a cross section

perpendicular to the weft direction (Y), the weft round

yarn 241 has a yarn diameter or width (D1) ranging from

0.15 mm to 0.35 mm, and a fineness ranging from 400

deniers to 1000 deniers; while the first weft flat yarn

242 has a width (D2) ranging from 1 mm to 5 mm, and a

fineness ranging from 700 deniers to 1200 deniers.

In other variations of the first embodiment, the

first weft flat yarn 242 may be a fibrillated film yarn.

Through this, in addition to enabling the bag body 2

to maintain excellent load strength along the weft

direction (Y), it can also accelerate the speed of aging

and decomposition through the lightening and thinning

characteristics thereof, so that the space needed for

the growth of plant rhizomes can be provided more

quickly.

The first weft flat yarn 242 of this embodiment has

a residual strength retention rate lower than that of

the weft round yarn 241 such that the first weft flat

yarn 242 ages and decomposes ahead of the weft round

yarn 241 to thereby expand the hole (A) to hole (A')

(see FIG. 6) for plant growth.

Further, when the weft round yarn 241 has a yarn

diameter/width (D1) of 0.25 mm and a fineness of 560 deniers, and the first weft flat yarn 242 has a width

(D2) of 2 mm and a fineness of 1000 deniers, according

to ASTM G154 Standard for Indoor UV Resistance Test

using an ultraviolet accelerated aging test machine to

perform a fast aging test, after going through 1,000

hours of irradiation with light (about two months in

outdoor environment), the residual strength retention

rate of the weft round yarn 241 ranges from 98% to 100%,

and the residual strength retention rate of the first

weft flat yarn 242 ranges from 50% to 70%.

In this embodiment, in the initial use of the warp

yarn groups 23 and the weft yarn groups 24 before

exposure to light, the size of the hole (A) is

approximately 1.5 mm x 1.5 mm ± 10%. Through this, the

soilor other fillingmaterials disposed in the bagbody

2 can be prevented from being washed out and lost due

to rain or water flow. Further, with the warp yarn groups

23 disposed parallel to a length direction (warp

direction X) of the bag body 2 and with the weft yarn

groups 24 disposed parallel to a width direction (weft

direction Y) of the bag body 2, the bag body 2 can have

excellent load strength along the warp direction (X)

and the weft direction (Y) when filled with the soil

or other filling materials. This can reduce the damage

of the bag body 2 during handling or construction,

thereby providing better structural stability during

stacking.

It is worth to mention herein that, under the same

fineness, and on a cross section perpendicular to the

weft direction (Y), the width (D2) of the first weft

flat yarn 242 is larger in comparison with the

diameter/width (D1) of the weft round yarn 241, that

is, the first weft flat yarn 242 has a thinner thickness

than the weft round yarn 241. Under such overlapping

mixing conditions, the bag body 2 will have a certain

degree of softness, so that it is more conducive to

stacking, and relative sliding can be avoided, thereby

further improving the stability when stacked.

When irradiated with light for a long time and a

decomposition reaction is generated, because the first

weft flat yarn 242 ages and decomposes ahead of the weft

round yarn 241, as the plant grows, it will break the

first weft flat yarn 242, and the hole (A) is expanded

to hole (A') (see FIG. 6) to provide a larger space for

plant growth, thereby achieving a better planting and

greening effect. At this time, the warp round yarns 231

of the warp yarn groups 23 and the weft round yarns 241

of the weft yarn groups 24 can continue to support the

structure and shape of the bagbody 2, thereby achieving

the effects of soil and water conservation and

cultivating vegetation.

In other variations of the first embodiment, the

number of the weft round yarn 241 and the first weft

flat yarn 242 of each weft yarn group 24 may be varied depending on the required strength or space for plant growth. For example, when each weft yarn group 24 has two weft round yarns 241 and two weft flat yarns 242 arranged in sequence, as shown in FIG. 7, under the condition that the load strength is not lowered, the the holes (A) are simultaneously and increasingly expanded after the aging and decomposing of the first weft flat yarns 242. This is beneficial to the space required for the growth of plant rhizomes, and can also maintain excellent soil and water conservation capability.

Moreover, according to different landforms or

different needs of environmental protection and

ecological improvement, in other variations of the

first embodiment, each warp yarn group 23 may include

a mixture arrangement of at least one warp round yarn

231 and at least one warp flat yarn (not shown), and

is not limited thereto.

Referring to FIG. 8, the second embodiment of the

high strength ecological grass planting bag according

to this disclosure is shown to be approximately

identical to the first embodiment. However, in the

second embodiment, each weft yarn group 24' of the bag

body 2 includes two weft round yarns 241, a first weft

flat yarn 242 and a second weft flat yarn 243. Each of

the weft round yarn 241 and the first weft flat yarn

242 is made of polyethylene (PE), while the second weft

1 0

flat yarn 243 is made of polypropylene (PP). Through

this, structural characteristics of different

materials may be developed.

The second weft flat yarn 243 has a fineness ranging

from 2000 deniers to 2600 deniers. The width of the

second weft flat yarn 243 is similar to the width (D2)

of the first weft flat yarn 242, that is, the width (D2)

ranges from1mm to5 mm. The residualstrengthretention

rate of the second weft flat yarn 243 is similarly lower

than that of the weft round yarn 241, so that the second

weft flat yarn 243 ages and decomposes ahead of the weft

round yarn 241, thereby expanding the hole (A) to hole

(A') (see FIG. 6) for plant growth.

In other variations of the second embodiment, the

secondweft flat yarn243 maybe a fibrillated filmyarn.

Through this, in addition to enabling the bag body 2

to maintain excellent load strength along the weft

direction (Y), it can also accelerate the speed of aging

and decomposition through the lightening and thinning

characteristics thereof, so that the space needed for

the growth of plant rhizomes can be provided more

quickly.

Further, the material of each of the first weft flat

yarn 242 and the second weft flat yarn 243, apart from

polyethylene (PE) and polyproplylene (PP), may also be

polyethylene terephthalate (PET), or other high

polymer, but is not limited thereto.

It is worth to mention herein that when the first

weft flat yarn 242 of the first embodiment is made of

polypropylene (PP), its structural characteristic is

similar to that of the second weft flat yarn 243.

In other variations of the second embodiment, each

weft yarn group 24" of the bag body 2 may include only

one weft round yarn 241 and one second weft flat yarn

243, as shown in FIG. 9.

The term 'comprising' as used in this specification

and claims means 'consisting at least in part of'. When

interpreting statements in this specification and

claims which include the term 'comprising', other

features besides the features prefaced by this term in

each statement can also be present. Related terms such

as 'comprise' and 'comprised' are to be interpreted in

a similar manner.

Claims (8)

1 2 The claims defining the invention are as follows:

1.A high strength ecological grass planting bag,

comprising:

a bag body defining a filling space configured

for receiving soil or other filling materials, and

having a bag mouth communicating with said filling

space, said bag body including a plurality of warp

yarn groups extending in a warp direction and spaced

apart from each other in a weft direction, and a

plurality of weft yarn groups extending in the weft

direction and spaced apart from each other in the

warp direction, each of said warp yarn groups

including at least one warp round yarn, each of said

weft yarn groups including at least one weft round

yarn and at least one first weft flat yarn, two of

said warp yarn groups cooperating with said at least

one weft round yarn and said at least one first weft

flat yarn of a corresponding one of said weft yarn

groups to define a hole for plant growth, said at

least one first weft flat yarn having a residual

strength retention rate lower than that of said at

least one weft round yarn such that said at least

one first weft flat yarn ages and decomposes ahead

of said at least one weft round yarn to thereby expand

the hole; and

a drawstring disposed on said bag body in

proximity to said bag mouth for closing and opening said bag mouth; wherein on a cross section perpendicular to the weft direction, said at least one weft round yarn has a yarn diameter or width ranging from 0.15 mm to 0.35 mm, and a fineness ranging from 400 deniers to 1000 deniers; and wherein on the cross section perpendicular to the weft direction, said at least one first weft flat yarn has a width ranging from 1 mm to 5 mm, and a fineness ranging from 700 deniers to 2600 deniers.

2. The high strength ecological grass planting bag as

claimed in Claim 1, wherein said bag body is formed

by plain weave, and said bag mouth is located on the

warp direction.

3. The high strength ecological grass planting bag as

claimed in Claim 1, wherein the residual strength

retention rate of said at least one first weft flat

yarn is lower than that of said at least one weft

round yarn using an ASTM G154 standard test.

4. The high strength ecological grass planting bag as

claimed in Claim 1, wherein each of said at least

one warp round yarn and said at least one weft round

yarn is made of polyethylene (PE).

5. The high strength ecological grass planting bag as

claimed in Claim 1, wherein said at least one first

1 4

weft flat yarn is made of polyethylene (PE), and on

a cross section perpendicular to the weft direction,

has a width ranging from 1 mm to 5 mm, and a fineness

ranging from 700 deniers to 1200 deniers.

6. The high strength ecological grass planting bag as

claimed in Claim 1, wherein said at least one first

weft flat yarn is made of polypropylene (PP), and

on a cross section perpendicular to the weft

direction, has a width ranging from 1 mm to 5 mm,

and a fineness ranging from 2000 deniers to 2600

deniers.

7. The high strength ecological grass planting bag as

claimed in Claim 1, wherein said at least one first

weft flat yarn is made of a fibrillated film yarn.

8.The high strength ecological grass planting bag as

claimed in any one of Claims 5 to 7, wherein each

of said weft yarn groups further includes at least

one second weft flat yarn which is made of a material

different from that of said at least one first weft

flat yarn and which is made of polyethylene or

polypropylene, said at least one second weft flat

yarn having a residual strength retention rate lower

than that of said at least one weft round yarn using

an ASTM G154 standard test.