CN113062047A - Production process of plain mesh jacquard non-woven fabric - Google Patents
Production process of plain mesh jacquard non-woven fabric Download PDFInfo
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- CN113062047A CN113062047A CN202110340554.6A CN202110340554A CN113062047A CN 113062047 A CN113062047 A CN 113062047A CN 202110340554 A CN202110340554 A CN 202110340554A CN 113062047 A CN113062047 A CN 113062047A
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- jacquard
- spunlace
- wet
- woven fabric
- net
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
- D04H1/495—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet for formation of patterns, e.g. drilling or rearrangement
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/498—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention discloses a flat-net jacquard non-woven fabric production device, and belongs to the field of non-woven fabric manufacturing equipment. The process comprises the following steps: s1: transferring the wet-process fiber layer obtained by wet-process molding to a water-permeable base layer on a spunlace to form a double-layer structure of the composite non-woven fabric; the spunlace net is pre-provided with jacquard patterns, meshes in the range of the jacquard patterns are not permeable, and meshes outside the jacquard patterns can be permeable; s2: and carrying out spunlace entanglement on the composite non-woven fabric on the spunlace from one side of the wet-process fiber layer by using a spunlace device, wherein the jetted water needle is blocked at the jacquard pattern position on the spunlace and turns around, so as to drive the fibers in the wet-process fiber layer above the jacquard pattern to move around, and form a concave-convex jacquard pattern on the composite non-woven fabric.
Description
Technical Field
The invention belongs to the field of non-woven fabric manufacturing, and particularly relates to a production process of plain net jacquard non-woven fabric.
Background
The existing nonwoven jacquard devices basically adopt the following 3 methods:
the method comprises the following steps: the fiber web is in a concave shape and a convex shape formed by the lines, the thickness and the weaving mode of the net threads of the spunlace net, and the fiber web is impacted by high-pressure water flow on the spunlace net to enable the fibers of the fiber web to slide and be stacked in the concave position to form a structural pattern which is the same as the structure of the net.
The method 2 comprises the following steps: the holes and the concave-convex patterns on the drum are adopted, so that the fibers of the fiber layer are accumulated in the holes and the concave parts under the action of the high-pressure water jet to form the pattern.
The method 3 comprises the following steps: the non-woven fabric is pressed by adopting concave-convex embossing rollers to form a concave-convex pattern.
However, the three methods have certain disadvantages in practical use:
the method comprises the following steps: the net weaving has certain limitation, complex patterns cannot be woven, the net weaving is complex, the net weaving of special patterns is difficult, the cost is high, and the net weaving is only suitable for regular and simple concave-convex patterns.
The method 2 comprises the following steps: the circular drums with various patterns can be made according to requirements by adopting circular drum jacquard, but some full-empty patterns are difficult to realize, and the manufacturing cost of the circular drums is very high.
The method 3 comprises the following steps: embossing by the embossing roller can only change the local concave-convex of the fiber layer, and if no thermal deformation fiber exists, the fiber layer is difficult to shape, and the pattern can hardly be seen after the fiber layer is wetted.
Therefore, how to weave a non-woven fabric needs to provide a simple and reliable composite non-woven fabric jacquard process.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a production process of plain mesh jacquard non-woven fabric.
The invention adopts the following specific technical scheme:
a production process of plain mesh jacquard non-woven fabric comprises the following steps:
s1: transferring the wet-process fiber layer obtained by wet-process molding to a water-permeable base layer on a spunlace to form a double-layer structure of the composite non-woven fabric; the spunlace net is pre-provided with jacquard patterns, meshes in the range of the jacquard patterns are not permeable, and meshes outside the jacquard patterns can be permeable;
s2: and carrying out spunlace entanglement on the composite non-woven fabric on the spunlace from one side of the wet-process fiber layer by using a spunlace device, wherein the jetted water needle is blocked at the jacquard pattern position on the spunlace and turns around, so as to drive the fibers in the wet-process fiber layer above the jacquard pattern to move around, and form a concave-convex jacquard pattern on the composite non-woven fabric.
Preferably, the jacquard pattern is printed by a waterproof material on a spunlace.
Further, the waterproof material is waterproof bonding glue.
Further, the waterproof material is epoxy resin.
Furthermore, the printing mode of the waterproof material is spraying or blade coating.
Preferably, the spunlace mesh is a resin mesh or a metal mesh.
Preferably, the composite non-woven fabric is formed by compounding and superposing a wet-process fiber layer and a water permeable base layer.
Preferably, the wet-process fiber layer is a staple fiber layer, and the staple fiber length is less than or equal to 5 mm.
Preferably, the staple fiber has a length of 3mm or less.
Preferably, the fibers of the wet fiber layer are natural plant fibers or chemical fibers, and the fibers of the water permeable base layer are terylene, polypropylene fibers, acrylic fibers, aramid fibers, terylene, acrylic, PPS, P84 or PTFE.
Compared with the prior art, the invention has the following beneficial effects:
the invention can complete the jacquard of various patterns by the spunlace process without adopting a special spunlace net and only forming the patterns on a flat net by coating, printing and other modes, thereby having extremely low manufacturing cost. In addition, the fiber web is always arranged above the spunlace net without transferring, and by the aid of multiple spunlace actions, jacquard and entanglement can be realized at the same time, so that patterns are clearer, processing procedures are greatly saved, and jacquard of non-woven fabrics is more effective and convenient.
Drawings
FIG. 1 is a flow chart of a production process of a plain mesh jacquard non-woven fabric;
FIG. 2 is a schematic plan view of a conventional hydroentangled web;
FIG. 3 is a schematic plan view of a hydroentangled web according to the present invention;
FIG. 4 is a schematic view of a composite nonwoven jacquard machine;
FIG. 5 is a schematic plan view of another hydroentangled web;
FIG. 6 is a schematic structural diagram of a composite nonwoven fabric;
FIG. 7 is a schematic view of the transfer of a composite nonwoven to a hydroentangled web;
FIG. 8 is a schematic view of the arrangement of the composite nonwoven fabric on the hydroentangling web;
FIG. 9 is a schematic illustration of a hydroentangling jacquard of the present invention;
FIG. 10 is a schematic diagram of a post-hydroentangling embossed pattern of a composite nonwoven fabric;
FIG. 11 is a schematic view of another jacquard pattern;
FIG. 12 is a schematic view of another jacquard pattern;
fig. 13 is a schematic view of another jacquard pattern.
The reference numbers in the figures are: the water jet net comprises a water jet net 1, sealing holes 2, water permeable holes 3, a water permeable base layer 4, a composite non-woven fabric 5, a water jet device 6 and a wet-process fiber layer 7.
Detailed Description
The invention will be further elucidated and described with reference to the drawings and the detailed description. The technical features of the embodiments of the present invention can be combined correspondingly without mutual conflict.
In a preferred embodiment of the present invention, as shown in fig. 1, there is provided a process for producing a plain-net jacquard nonwoven fabric, comprising the steps of:
s1: and transferring the wet fiber layer obtained by wet forming to a water-permeable base layer on the spunlace to form a double-layer structure of the composite non-woven fabric.
It should be noted that, as shown in fig. 2, the conventional spunlace 1 is a flat web with a large number of holes densely distributed therein, the composite nonwoven 5 is laid on the web surface of the web, and the water needles projected from the spunlace device 6 can directly penetrate through the web body through the holes during the spunlace process, thereby performing spunlace entanglement on the nonwoven. However, in the present invention, such a hydroentangled web 1 is somewhat modified. Referring to fig. 3, the spunlace 1 seals and seals part of the mesh holes with waterproof material, so that the water needles cannot penetrate the mesh holes. For convenience of description, the meshes of the spunlace net 1 blocked by the waterproof material are referred to as sealed holes 2, and the meshes not blocked by the waterproof material are referred to as water-permeable holes 3. The specific arrangement position of the sealing holes 2 on the mesh surface needs to be designed according to patterns needing jacquard, and the patterns are consistent with the patterns which are finally formed. The jacquard pattern on the spunlace net 1 should be preset, the meshes in the jacquard pattern range are not permeable, and the meshes outside the jacquard pattern can be permeable.
S2: when S1 is completed, the composite nonwoven fabric 5 is transferred under the hydroentangling device 6 by the hydroentangling web 1, as shown in fig. 4. The composite non-woven fabric on the spunlace is spunlaced from one side of the wet-process fiber layer by using a spunlace device, and jetted water needles are blocked at the jacquard patterns on the spunlace and turn around to drive fibers in the wet-process fiber layer above the jacquard patterns to move around, so that concave-convex jacquard patterns can be formed on the composite non-woven fabric.
The waterproof material on the spunlace 1 can realize the plugging of meshes through coating and printing modes such as spraying, blade coating and the like, so that a waterproof pattern is formed on the net surface. The waterproof material can be selected according to actual needs, needs to have certain cohesiveness with the material of the spunlace net, and can be firmly fixed on the spunlace net 1. At the same time, the waterproof material should have sufficient strength so that it does not fall off under the impact of the squirt. In the invention, the waterproof material can adopt waterproof bonding glue, and epoxy resin is recommended. Of course, other waterproof materials can be used as long as the corresponding functions can be realized. The hydroentangled web 1 in the present invention may be made of a material such as a resin mesh or a metal mesh.
In fig. 2, the water-repellent material is filled in the pores of the hydroentangling net 1, so that a sealing closure of the pores is formed. However, this is not the only form in fact, and as shown in fig. 5, the water repellent material may also be applied not completely embedded in the mesh, but rather bonded in a flat layer to the mesh face of hydroentangling net 1, thereby forming a sealed closure of the mesh. By adopting the methods, the sealing and plugging of the meshes can be realized, and the invention is not limited. Of course, the spunlace mesh 1 may also be formed with the aforementioned jacquard pattern by other processes besides printing of the waterproof material, which is not limited to this.
The basic functional components of the hydro-entangled device 6 are a plurality of hydro-entangled heads, which of course need to be realized by matching with other pipelines, pressurizing devices and other devices, and all belong to the prior art, and are not described herein again. In the invention, the spunlace heads on the spunlace device 6 are all positioned above the spunlace net 1, and the jet flow direction of the water needles of each spunlace head is vertical to the net surface of the spunlace net 1 when in spunlace entanglement, so as to carry out spunlace on the composite non-woven fabric 5 arranged on the spunlace net 1.
It should be noted that, the invention is specifically directed to a jacquard process of composite non-woven fabric, and the composite non-woven fabric 5 is generally formed by laminating a wet-process fiber layer 7 and a water-permeable base layer 4, as shown in fig. 6. In the process of the present invention, as shown in fig. 7, the wet-process fiber layer 7 in the composite nonwoven fabric 5 may be directly transferred from the wet-process former to above the water-permeable base layer 4 previously laid on the hydroentangled web 1, and then subjected to the hydroentangling process. Finally, as shown in fig. 8, the composite nonwoven fabric is placed on the hydroentangled web 1 with the wet-laid fibrous layer 7 on top of the upper water-permeable base layer 4.
Referring to fig. 9, the patterning principle of the composite nonwoven jacquard device is to use the water-impermeable characteristic of the sealing hole 2 during the hydroentangling process, where the jet of the water needle is turned around the sealing hole 2 and flows down from the water-permeable hole 3, thereby generating a lateral force to the wet-process fiber layer 7 in the composite nonwoven 5 above the sealing hole 2. As shown in fig. 10, in the process of continuous impact of the water jet, the diverted water jet gradually pushes the fibers in the wet-process fiber layer 7 to the periphery, and the fibers are gathered on the permeable base layer 4 around the sealed hole 2 to form a fiber accumulation area a, while the amount of the fibers in the wet-process fiber layer 7 on the permeable base layer 4 right above the sealed hole 2 is reduced or almost disappeared to form a blank missing area B. The fiber accumulation area A and the blank missing area B finally obviously form a concave-convex fiber layer, and a pattern which is the same as the printing pattern is formed after a plurality of hydro-entangled processes, so that the jacquard of the non-woven fabric is effectively finished.
The invention pushes the fiber to move by the thrust formed after the water needle turns, thereby forming the jacquard pattern, therefore, the invention is more suitable for the composite non-woven fabric. The wet-process fiber layer in the composite non-woven fabric is usually a short fiber layer, the length of the short fiber is generally less than 5mm, and the composite non-woven fabric has good mobility. If the fiber length is too long, the mobility is poor, and an obvious concave-convex fiber layer is not easy to form. In the present invention, the staple fiber length is preferably controlled to 3mm or less. In addition, the specific materials of the wet-process fiber layer 7 and the water permeable base layer 4 in the present invention are not limited, the wet-process fiber layer 7 may be one or more of natural plant fibers (wood pulp fibers, bamboo pulp fibers, hemp pulp fibers, cotton pulp fibers, etc.) or chemical fibers (viscose fibers, tencel fibers, etc.), and the water permeable base layer 4 may be any base material that meets the use requirement of non-woven fabrics as long as it has water permeability to allow water needles to pass through, such as dacron, polypropylene fibers, acrylic fibers, aramid fibers, dacron, acrylic, PPS, P84, PTFE, etc.
Although the composite nonwoven fabric in fig. 6 has only two layers, the present invention may be applied to a multilayer composite nonwoven fabric having 3 or more layers, and is not limited thereto.
In addition, the jacquard pattern on the spunlace 1 of the present invention can be set according to the actual situation, and fig. 11 to 13 show some different patterns, but the present invention is not limited thereto.
Therefore, the invention can finish the jacquard of various patterns by the spunlace process without adopting a special spunlace net and only forming the patterns on the flat net by coating, printing and other modes, and the manufacturing cost is extremely low in turn. In addition, the fiber web is always arranged above the spunlace net without transferring, and by the aid of multiple spunlace actions, jacquard and entanglement can be realized at the same time, so that patterns are clearer, processing procedures are greatly saved, and jacquard of non-woven fabrics is more effective and convenient.
The above-described embodiments are merely preferred embodiments of the present invention, which should not be construed as limiting the invention. Various changes and modifications may be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, the technical scheme obtained by adopting the mode of equivalent replacement or equivalent transformation is within the protection scope of the invention.
Claims (10)
1. A production process of plain mesh jacquard non-woven fabric is characterized by comprising the following steps:
s1: transferring the wet-process fiber layer obtained by wet-process molding to a water-permeable base layer on a spunlace to form a double-layer structure of the composite non-woven fabric; the spunlace net is pre-provided with jacquard patterns, meshes in the range of the jacquard patterns are not permeable, and meshes outside the jacquard patterns can be permeable;
s2: and carrying out spunlace entanglement on the composite non-woven fabric on the spunlace from one side of the wet-process fiber layer by using a spunlace device, wherein the jetted water needle is blocked at the jacquard pattern position on the spunlace and turns around, so as to drive the fibers in the wet-process fiber layer above the jacquard pattern to move around, and form a concave-convex jacquard pattern on the composite non-woven fabric.
2. The process for producing plain-web jacquard nonwoven fabric according to claim 1, wherein the jacquard pattern is printed from a water-repellent material on a spunlace.
3. The process for producing plain mesh jacquard nonwoven fabric according to claim 2, wherein the waterproof material is waterproof adhesive glue.
4. The composite nonwoven jacquard apparatus of claim 2, wherein said water-resistant material is epoxy.
5. The process for producing plain-mesh jacquard nonwoven fabric according to claim 2, wherein the waterproof material is printed by spraying or knife coating.
6. The process for producing plain-net jacquard nonwoven fabric according to claim 1, wherein the spunlace net is a resin net or a metal net.
7. The process for producing plain jacquard nonwoven fabric according to claim 1, wherein the composite nonwoven fabric is formed by laminating a wet-process fiber layer and a water-permeable base layer.
8. The process for producing plain-web jacquard nonwoven fabric according to claim 1, wherein the wet-laid fiber layer is a staple fiber layer, and the staple fiber length is less than 5 mm.
9. The process for producing plain-web jacquard nonwoven fabric according to claim 8, wherein the staple fibers have a length of 3mm or less.
10. The production process of the plain-net jacquard non-woven fabric according to claim 1, wherein the fibers of the wet-process fiber layer are natural plant fibers or chemical fibers, and the fibers of the water-permeable base layer are terylene, polypropylene, acrylic, aramid, terylene, acrylic, PPS, P84 or PTFE.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110340554.6A CN113062047A (en) | 2021-03-30 | 2021-03-30 | Production process of plain mesh jacquard non-woven fabric |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110340554.6A CN113062047A (en) | 2021-03-30 | 2021-03-30 | Production process of plain mesh jacquard non-woven fabric |
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| CN113062047A true CN113062047A (en) | 2021-07-02 |
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| CN202110340554.6A Pending CN113062047A (en) | 2021-03-30 | 2021-03-30 | Production process of plain mesh jacquard non-woven fabric |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1327712A1 (en) * | 2002-01-15 | 2003-07-16 | Rieter Perfojet | Machine for the production of a patterned textile product and nonwoven product produced therefrom |
| CN101325936A (en) * | 2005-12-07 | 2008-12-17 | Sca卫生产品股份公司 | Nonwoven material and absorbent products including the same |
| CN203077715U (en) * | 2012-12-13 | 2013-07-24 | 常州维盛无纺科技有限公司 | Embossed fire non-woven fabric |
| CN106906570A (en) * | 2017-03-13 | 2017-06-30 | 浙江洁诺新材料有限公司 | Spunlace non-woven cloth and its manufacture method |
| CN107532352A (en) * | 2015-04-28 | 2018-01-02 | 特吕茨施勒有限及两合公司 | Fiber is reinforced and structuring is with the method and apparatus as non-woven fabric |
| CN108691096A (en) * | 2018-05-02 | 2018-10-23 | 阳光卫生医疗新材料江阴有限公司 | A kind of preparation method, non-woven fabrics and the application of water conservation non-woven cloth |
-
2021
- 2021-03-30 CN CN202110340554.6A patent/CN113062047A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1327712A1 (en) * | 2002-01-15 | 2003-07-16 | Rieter Perfojet | Machine for the production of a patterned textile product and nonwoven product produced therefrom |
| CN101325936A (en) * | 2005-12-07 | 2008-12-17 | Sca卫生产品股份公司 | Nonwoven material and absorbent products including the same |
| CN203077715U (en) * | 2012-12-13 | 2013-07-24 | 常州维盛无纺科技有限公司 | Embossed fire non-woven fabric |
| CN107532352A (en) * | 2015-04-28 | 2018-01-02 | 特吕茨施勒有限及两合公司 | Fiber is reinforced and structuring is with the method and apparatus as non-woven fabric |
| CN106906570A (en) * | 2017-03-13 | 2017-06-30 | 浙江洁诺新材料有限公司 | Spunlace non-woven cloth and its manufacture method |
| CN108691096A (en) * | 2018-05-02 | 2018-10-23 | 阳光卫生医疗新材料江阴有限公司 | A kind of preparation method, non-woven fabrics and the application of water conservation non-woven cloth |
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