CN102971456B

CN102971456B - Fabric for non-woven web forming process and method of using same

Info

Publication number: CN102971456B
Application number: CN201180030859.1A
Authority: CN
Inventors: H-P.布罗伊尔; H.赖特雷尔
Original assignee: Huyck Licensco Inc
Current assignee: Huyck Licensco Inc
Priority date: 2010-09-28
Filing date: 2011-09-21
Publication date: 2015-04-29
Anticipated expiration: 2031-09-21
Also published as: JP5667302B2; CA2801943C; CA2801943A1; PT2572021E; WO2012047511A1; JP2013542333A; CN102971456A

Abstract

A method of manufacturing a non-woven web includes the step of collecting stretched filaments that form the non-woven web on a fabric in an apparatus for the formation of non-woven webs. The fabric comprises machine direction (MD) yarns and cross-machine direction (CMD) yarns, wherein the MD and CMD yarns are interwoven in a repeating pattern in which at least some of the CMD yarns are interwoven with the MD yarns in pairs that follow the same weaving sequence. Such a fabric can provide potential advantages such as reduced air leakage, reduced air disturbances, and improved web hold-down effect.

Description

For fabric and the using method thereof of nonwoven webs formation process

Related application

This application claims the U.S. Provisional Patent Application No.61/387 submitted on September 28th, 2010, the priority of 139, its disclosure is incorporated to herein with its entirety by reference at this.

Background technology

By long filament or the spunbond fabric of fibroplastic non-woven usually by thermoplastic resin in such as U.S. Patent No. 5,814, make in device disclosed in 349, its disclosure is incorporated to herein by reference.This device generally includes for generation of the spinning head of line stock curtain and for cooling yarn stock curtain to form the technique wind blower fan of thermoplastic filament by technique wind to line stock curtain is used for.Thermoplastic filament is then usual to be carried by technique wind air force, for air force ground stretched thermoplastic long filament, thermoplastic filament, through after diffuser, is then deposited on continuous circulation sieve band or the fabric for forming fabric by the long filament be wound around mutually boundling and above.Then the fabric of formation like this stands further process.The such exemplary means being particularly useful for the production of high-speed spun-bond fabric can obtain from the Reifnhauser GmbH Co. company of German Troisdorf, Maschinenfabrik at present, and on sale with title Reicofil.Other exemplary formation machines can obtain from the Oerlikon Neumag of German Neumunster.

This equipment makes great efforts to operate with more and more higher speed.Most high speed technology comprises the long filament base fabric being less than 2 DENIER, is wherein called that thin dawn fabric spins with the highest speed relative to what be less than 1 DENIER.High-speed spinning relates at a high speed, small diameter fibers, and it will be owing to will naturally show elastic force when impacting at a high speed, and seepage sieve is with or fabric due to its small size relative to fabric openings region.Further, in some machines, fabric needs permission to remove excess air in " sealing " disclosed in patent as previously described types of devices.In other machines, there is no annular seal space, but material is discharged on fabric.In this case, thus expect that there is the fabric with highly-breathable, low leakage and sufficient profile, " splash " to avoid uncontrollable fiber between depositional stage.Further, diffuser is placed and to be obtained near fabric by new High Speed System, which increases fibre high-speed and vertically strikes amplitude on fabric and quantity.

The fabric used in high-speed spun-bond production line at present or band are in good grip and excessively compromise between seepage.Such as, when fabric can provide the good grip of fabric, it with fiber pervasion and may leak in fabric or band as cost and doing like this.Alternatively, when fabric can limit the seepage of the long filament of deposition, it does for cost like this with fabric gripping.A kind of example fabric in U.S. Patent No. 7,578, discuss in 317, its disclosure is incorporated to herein with its entirety at this.Another kind of example fabric is discussed in International Patent Publication WO 09/030033, and its disclosure is incorporated to herein by reference at this.Other fabrics being provided for product line of spinning viscose can be expected, especially with those fabrics run up.

Summary of the invention

As first aspect, embodiments of the invention relate to a kind of method manufacturing nonwoven webs.Described method is included in the device for the formation of nonwoven webs and will forms the step of the elongate filaments boundling of nonwoven webs on fabric.Described fabric comprises machine direction (MD) yarn and transverse machine (CMD) yarn, and wherein MD and CMD yarn line interweave with repeat patterns, and at least some wherein in CMD yarn line and MD yarn interweave in pairs, and they adopt identical braiding order.This fabric can provide potential advantage, the fabric grip effect of the air leakage such as reduced, the air agitation of minimizing and improvement.

As second aspect, embodiments of the invention relate to a kind of method manufacturing nonwoven webs, described method is included in the device for the formation of nonwoven webs and will forms the step of the elongate filaments boundling of nonwoven webs on fabric, wherein said fabric comprises MD yarn, single bottom CMD yarn and top CMD yams, wherein MD and CMD yarn line interweave with repeat patterns, at least some wherein in top CMD yams and MD yarn interweave in pairs, and they adopt identical braiding order.

As the third aspect, embodiments of the invention relate to a kind of method manufacturing nonwoven webs, described method is included in the device for the formation of nonwoven spunbond fabric and will forms the step of the elongate filaments boundling of nonwoven webs on fabric, wherein said fabric comprises MD yarn and CMD yarn line, wherein MD and CMD yarn line interweave with repeat patterns, wherein all CMD yarn lines and MD yarn interweave in pairs, and they adopt identical braiding order, and wherein the section of CMD yarn line is circular.

Accompanying drawing explanation

Fig. 1 and Fig. 2 is the schematic diagram of spunbond manufacturing installation.

Fig. 3 is the zoomed-in view of the exemplary Weaving pattern of fabric for using in the device of Fig. 1 and Fig. 2.

Fig. 4 is the amplification view of the exemplary Weaving pattern of alternative fabrics for using in the device of Fig. 1 and Fig. 2.

Fig. 5 is the amplification view of the exemplary Weaving pattern for the another kind of alternative fabrics used in the device of Fig. 1 and Fig. 2.

Fig. 6 is the amplification view of the exemplary Weaving pattern of another alternative fabrics for using in the device of Fig. 1 and Fig. 2.

Detailed description of the invention

More fully will describe the present invention hereinafter, illustrated therein is the preferred embodiments of the present invention.But the present invention can implement in different forms and should not be interpreted as being limited to the embodiment set forth herein.These embodiments but be provided as make the disclosure content to be detailed in complete, and will pass on scope of the present invention completely to those skilled in the art.In all of the figs, same numbers represents similar elements.In order to clear thickness and the size that may amplify some parts.

Unless otherwise defined, otherwise as used herein all terms (comprising technology and scientific terminology) have and usually understand identical implication with those skilled in the art.Should also be appreciated that, the term such as defined in normally used dictionary should be interpreted as having the consistent implication of implication with them in the context of association area, and will do not explained by with idealized or excessively formal meaning, limit like this unless clear and definite herein.

Term is only the object in order to describe specific embodiment as used herein, instead of is intended to limit the present invention.As use alpha nerein, singulative " ", " one " and " being somebody's turn to do " are intended to also comprise plural form, unless context is clearly pointed out in addition.Should also be appreciated that, term " comprise " and/or " comprising " when using in this manual, clearly state the existence of described feature, entirety, step, operation, element and/or parts, but do not get rid of the existence or additional of one or more other features, entirety, step, operation, element, parts and/or its combination.As use alpha nerein, express "and/or" to comprise one or more and relevant list any of item and all combinations.

In addition, in this article can usage space relative terms, such as " below ", " below ", " bottom ", " top ", " top " etc., the description for the relation making a description element as illustrated in the drawings or feature and other elements or feature is easy.Should be appreciated that, except describe in the accompanying drawings towards except, the difference that space relative terms is intended to also to be included in the equipment used or in running towards.Such as, if equipment is upset in the accompanying drawings, be so described as other elements or feature " below " or " below " element will be oriented in other elements or feature " top ".Therefore, exemplary term " below " can comprise above and below two towards.Described equipment can in addition towards (90-degree rotation or be in other towards), and space used herein relative terms is correspondingly explained.

For simplicity and/or clear, known function or formation may be described in no detail.

More specifically forward accompanying drawing to now, Fig. 1 and Fig. 2 is the general diagram of the device 10 for the high-speed spun-bond production of nonwoven webs material.In order to the object of this discussion, term " fabric " is used for representing the bondedfibre fabric produced by high-speed spun-bond apparatus.This be in order to in foregoing U.S. Patent No. 5,814, the sieve band forming fabric above of reference in 349 or fabric or continuous annular strip or seam connecting belt, as differentiated.Fabric disclosed herein is equal to aforementioned strip.In this, Fig. 1 and Fig. 2 is only expressed as the representative of spunbond device, and should not be considered as and be specific to the present invention.

Forward Fig. 3 to now, illustrated therein is the fabric 20 that can use in the device of Fig. 1 and Fig. 2.Fabric 20 comprise MD yarn 22,24,26,28,30 and with CMD yarn line 40a, 40b, 42a, 42b and 44a of MD yarns interwoven, 44b.MD yarn and CMD yarn line weave with plain weave pattern (that is, the repeat patterns of " upper 1/ time 1 "), except CMD yarn line and MD yarn weave in pairs, so that identical right CMD yarn line adopts identical braiding order.Such as, CMD yarn line 40a, 40b pass below MD yarn 22, above MD yarn 24, below MD yarn 26, above MD yarn 28 and below MD yarn 30.Other CMD yarn lines are when carrying out identical pairing with during MD yarns interwoven.

The yarn comprising fabric 20 generally includes monofilament, is generally circular monofilaments.Some yarns in MD and/or CMD can be antistatic yarns, usually have copper sulfide or carbon coating.In certain embodiments, the yarn that yarn is right can be different yarn; Such as, a yarns of a pair can have the different diameter of another yarns right from this, or can be formed by different materials.

Adjacent circular CMD yarn line can produce and guide air by the unique shape of fabric 20 in an advantageous manner, for fabric formation process.Potential advantage can comprise the fabric grip effect of the air leakage of minimizing, the air agitation of minimizing and improvement.Further, adjacent circular CMD yarn line can produce the bump contact region with fabric, thus interrupts contact surface (region 50 for example, such as, in Fig. 3).The molten drop of polymer that can promote to remove dust like this and stay from fabric formation process.

The Weaving pattern of the fabric 20 illustrated can change.Alternative exemplary Weaving pattern shown in Figure 4, it illustrates fabric 120.Fabric 120 comprise MD yarn 122,124,126,128, single bottom CMD yarn 130,134,138,142 and top CMD yams 132a, 132b, 136a, 136b, 140a, 140b, 144a, 144b in pairs.As can be seen in the diagram, MD yarn and CMD yarn line interweave so that every bar MD yarn is through above two adjacent single bottom CMD yarn and a pair paired top CMD yams, then pass two adjacent single bottom CMD yarn and three to below paired top CMD yams.Such as, MD yarn 122, through above adjacent single bottom CMD yarn 130 and 134 and paired top CMD yams 132a, 132b, then passes below adjacent single bottom CMD yarn 138 and 142 and paired top CMD yams 136a, 136b, 140a, 140b, 144a, 144b.Which produces the fabric that single bottom CMD yarn and paired top CMD yams replace in braided fabric.As shown in Figure 4, in certain embodiments, single CMD yarn line can be the size different from paired CMD yarn line and/or different material types.

The modification of fabric 120 is shown in fig. 5 and fig..Fig. 5 illustrates the fabric 120 ' identical with fabric 120, except one interior top CMD yams 132a ', 132b '-144a '-144b ' be of different sizes except.As mentioned above, the yarn of a centering also can be formed by different materials.Fig. 6 illustrates the fabric 120 ' identical with fabric 120 ', except paired top CMD yams is with except top CMD yams (such as CMD yarn line 132a ' ', the 132b ' ') replacement of three group.Therefore, can find out in certain embodiments, paired yarn can replace in order to three of same sequence braiding or more yarns.

Person of skill in the art will appreciate that, although show spunbond device herein, fabric 20,120,120 ', 120 ' ' can be suitable for equally forming nonwoven webs, such as air-laying technique via other manufacturing technologies.

Noted earlier is exemplary elaboration of the present invention, and should not be interpreted as limitation of the present invention.Although described exemplary embodiment of the present invention, those skilled in the art will easily recognize, when not departing from novel teachings of the present invention and advantage in essence, can have many changes in the exemplary embodiment.Thus, all this changes are intended to be included in the scope of the present invention as claim record.The present invention is by claims and the equivalents waiting the claim be included in wherein.

Claims

1. manufacture a method for nonwoven webs, comprise the steps:

The elongate filaments boundling of nonwoven webs will be formed on fabric in for the formation of the device of nonwoven webs, wherein said fabric comprises machine direction (MD) yarn and transverse machine (CMD) yarn, and wherein said MD yarn and CMD yarn line interweave with repeat patterns, at least some wherein in CMD yarn line and MD yarn interweave in pairs, and they adopt identical braiding order.

2. the method for claim 1, wherein all CMD yarn lines and MD yarn interweave in pairs.

3. the method for claim 1, wherein only some CMD yarn lines interweave in pairs.

4. the method for claim 1, wherein CMD yarn line is to the part of CMD yarn line being three group.

5. the method for claim 1, the section of wherein said CMD yarn line is circular.

6. the method for claim 1, at least some wherein in CMD yarn line is antistatic yarn.

7. the method for claim 1, wherein CMD yarn line is monofilament.

8. the method for claim 1, wherein at least one CMD yarn line is to the CMD yarn line comprising different-diameter.

9. the method for claim 1, wherein said device is spunbond device.

10. manufacture a method for nonwoven webs, comprise the steps:

The elongate filaments boundling of nonwoven webs will be formed on fabric in for the formation of the device of nonwoven webs, wherein said fabric comprises machine direction (MD) yarn, single bottom transverse machine (CMD) yarn and top CMD yams, wherein said MD yarn and CMD yarn line interweave with repeat patterns, at least some wherein in top CMD yams and MD yarn interweave in pairs, and they adopt identical braiding order.

11. methods as claimed in claim 10, the section of wherein said top CMD yams is circular.

12. methods as claimed in claim 10, at least some wherein in top CMD yams is antistatic yarn.

13. methods as claimed in claim 10, wherein top CMD yams is monofilament.

14. methods as claimed in claim 10, wherein at least one top CMD yams is to the CMD yarn line comprising different-diameter.

15. methods as claimed in claim 10, wherein said device is spunbond device.

16. 1 kinds of methods manufacturing nonwoven webs, comprise the steps:

The elongate filaments boundling of nonwoven webs will be formed on fabric in the device for nonwoven spunbond fabric, wherein said fabric comprises machine direction (MD) yarn and transverse machine (CMD) yarn, wherein said MD yarn and CMD yarn line interweave with repeat patterns, wherein all CMD yarn lines and MD yarn interweave in pairs, they adopt identical braiding order, and the section of wherein said CMD yarn line is circular.