DE1942904A1 - Method for feeding weft material - Google Patents

Description

CALOON CORPORATION • P-O.Box 1346, Pittsburgh, Pennsylvania 15230, V. St. A.

Method of feeding weft material

The invention relates to the introduction of weft threads or yarns into a warp shed by means of a water jet. One Such a working method is with water jets or nozzles working professorships, such as those in the USA patents 2 998 029 and 3 370 618 are applicable. Similar Chairs to which the present invention may find application are shown in U.S. Patents 3,180,368; 3,372,711 and 3,233,634. For those who work with water jets A water jet emerging from a nozzle at high speed is used in looms to remove the weft material to give his direction. A shooter is not required with such a chair.

As is well known, the tendency of the rasser to assume a turbulent flow in a pipeline can lead to the consumption of a large part of its energy. In order to reduce the turbulence in the flow of aqueous systems, various additional means have been provided, for which purpose for example the US Patents 3 023 76o ₁ 3,099,993, 3,254,719, 3, 102 and 3,290,883, reference is made. Also of interest is the US Department of Commerce's publication "Studies of the reduction of Pipe Friction with the Non-Newtonian Additive

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C-853

ClIO "by Ripben and Pelch, April 1963. To the ζην turbulence- 'suppression or" Reibunßsvei ^ indaruns "" proposed in Eohrleitimgen water-soluble polymers include carboxymethyl cellulose, sodium! yatyroleulforiat, polyacrylamide and bydrolycierfcea polyacrylamide. Hydrogenated polyacrylamide derivatives have found a wide range of uses as fuel primers in hydraulic breakdown of the formation in petroleum technology. Kit Polyüthylenöxid, Ρλίζ, τ Gum and other high molecular weight, water-soluble-Polycisren iet a substantial reduction of the turbulent flow Lsw. The friction-relieved material in the pipe has been preserved. The polymers mentioned in this paragraph are sometimes also referred to as "coelastic" polymers.

Bich has shown that polyethylene oxide is added a pipeline irrigation system the recorded area Significantly enlarged, since the energy is lost in the pipelines is reduced accordingly (cf. Ghera. Eng., 71, No. 16, p. 36 (Aug. 1, 1966)). It has also been reported that when adding polyethylene oxide to the by one Fire hose to be sent water. Splash dee'assers was seen over a much greater distance.

Kit the "as8-ray chair" will solve many of the difficulties overcome which the conventional, mechanical, and bringing the shot material in the chair provides shooters. The V'asa jet devices are easy to steer and have few moving parts and therefore less likely to result in mechanical failure., and ssan. leans ait himea a much faster work than with mechanical Schüt-ZSTistisreiTirichinnigSTi ersioleti. JsSseh ordered β? Τι eesoh.win— or efficiency point. the the. water jet chair due to the inclination of the beam sum so far could not exceed divergence. It also has difficulties

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tet to maintain the level of accuracy and adjustment of the beam (see U.S. Patent 3,381,721).

According to the invention, Zueatz makes it water-soluble Polymers of the type defined below to ensure cohesion dea jet during its free movement or flight movement is significantly improved and thereby the achievement of a higher degree of accuracy and a higher level of accuracy Speed of fire allows. Dntnit can emit rays can be used for wider chairs. The effect achieved is not based solely on cohesion, adhesion or viscosity, but also on "friction reduction", i.e. H. a minimization of turbulent flow and a reinforcement the occurrence of laminar flow, and I was like in the nozzle also during the passage through the Kettfaoh. The slope of the Jet to diverge or assume a spray state, is minimized.

It's at this point! ^{It should be} emphasized that in the case of V. 'water jet nozzles, the type described in the USA patent ?. 998 029 bencliriebenen type the shot material with the water is passed through the nozzle so that it emerges from the nozzle in a state substantially surrounded by the jet or submerged in this state. It can be assumed that the weft material has a significant effect on the turbulent flow of the Viassera as it exits the nozzle. The present invention allows the flow to be smoothed and results in a steady, full jet that extends over the warp shed.

The present invention, on the other hand, is also applicable to Sehuss jet throwing devices of the type described in US Pat. No. 3,180 applicable, in which the weft yarn with the Beam is brought together after passing through the nozzle.

The polymers for the purposes of the invention are water soluble

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Polymers generally having a molecular weight of at least 10,000. An upper limit for the molecular weight that can be used has as long as the polymer is soluble. not surrendered. Polymers with a molecular weight of less than 10,000 which have a turbulence-suppressing effect in aqueous solutions are also suitable. The polymers for the purposes of the invention include polyacrylic acid, polyacrylamide, hydrolyzed polyacrylamide, sodium polyetyrenesulfonate, polyvinylpyrrolidone, polyethylene oxide, dextran. Dialdehyde starch, guar gum, karaya gum, alginates, polyethyleneimine. Carboxymethyl cellulose, variants thereof such as carboxymethyl hydroxyethyl cellulose, and many other water soluble polymers such as copolymers of acrylamide with other, water soluble polymer forming monomers. The explanation of the copolymers are used by the ethylene polymerization of acrylamide with one or more other water-soluble comonomers in proportions up to a major proportion, e.g. B. 50 Mol $ or the like, such as acrylic acid, methacrylic acid, the alkali, amine and ammonium salts of acrylic and methacrylic acid, methacrylamide, ß-aminoethyl acrylate, ß-aminoethyl methacrylate, N-methyl ~ ß-aminoethyl acrylate, U-methylaminoethyl methacrylate, H _f N-dimethyl-ßamiüoäthyl-methacrylat, Diacetcnacrylamid and the water-soluble, ϊΓ-alkyl-eubstituted acrylamides and methaerylamides, such as N-isopropyl acrylamide, obtained. Other comonomers of the water-soluble class are the alkali styrene sulfonates and alkali vinyl benzoates, diallylamines and disubstituted diallyl quatttrammonium halides. Allyl alcohol, U-vinylpyridine, !! "- vinylpyrrolidone and H-vittyl-2-oxazolidone are also suitable. If desired, water-insoluble monomers can also be copolymerized with the acrylamide to form acrylamide polymers for the purposes of the invention. To maintain the required water solubility Such copolymers usually do not contain more than about 25 M0I56 of the waeeeiv insoluble comonomer. Such comonomers are illustrated by styrene, vinyl chloride, vinylidene chloride, methyl meth-

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aerylat and methacrylonitrile.

All ethylene oxide polymers are suitable for long-range polymers, which is characterized by a minimum of Vemetaungen and a high Identify molecular weight.

Polyacrylamide, hydrolyzed polyacrylamide and water-soluble Copolymers of acrylamide, such as those discussed above, can collectively be referred to as polyacrylamide.

A polyacrylamide is preferably used which is hydrolyzed to a degree corresponding to the conversion of about 10 to 40 # of its amide groups into carbonic acid groups. Commercial polyacrylamide generally has a degree of hydrolysis not greater than about 40%, but levels as high as 65 % have been reported.

One can use polymer concentrations of about 10 to 500 ppm or work more, d. H. achieve at least some noticeable effect, but the benefits are approaching at the lower end of this range the minimum, and at the upper end for some polymers and some types of yarn a a certain slip of the weft material occur. It is preferable to work with about 50 to 400 ppm. Amounts over 500 ppm can be used if there is one to be observed due to the nature of the shot material introduced into the chair Slip is minimal.

When the polymer is dissolved in the water and pumped into the At the nozzle, care should be taken to ensure that there is as little air as possible in the form of bubbles in the solution, as Bubbles are compressible and lead to interruptions in the jet. A certain number of interruptions in generation per unit of time due to defects or the like in the product, however, are not unacceptable in practice.

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The Polymerlöeung acheint at polymer concentrations of about 300 ppm under provide superior adhesion Schiiijamaterial om \\ z. Monofilament weft materials are anochsinend to steer the process according to the invention heavier than yarns formed from staple fibers. However, an ata content of the water-soluble polyrasren keeps the shooting material better than simple V / aeeer.

Beyond the above advantages is with the according to the invention achieved a high speed and in characteristic V.'eioe a ray showing too much of an arm a nozzle jet adjustment and adjustment with high accuracy possible.

The speed of the water jets in an "anaerstrahl-Stubl of the type Elitex model H-125-R has been increased by the use of 300 ppm polyacrylamide of 30 pounds hydrolysis degree in the tasoer by almost 50 #, with a substantial increase in the StuhlauBotosseo revealed.

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Claims (1)

τ- August 22, 1969 a t e η t a η s ρ r ti c h e Method for feeding shot material by means of a v'aseeiststrahls, vie to a loom baw. in a box, characterized in that ο you can use the feeder Vaseo? with a content of at least about 10 ppm water-soluble, suppresses turbulence in aqueous solution acting polymers causes. ?. Ye rfahren according to claim 1, characterized. there seeds as the water-soluble polymer, an acrylamide polymer ν »r / end et. 3. "" 'experience according to claim 1 or 2, characterized in that a polymer having a molecular weight of at least 10,000 is allowed to be used. 4. "> experience according to one or more of claims 1 to 3» characterized in that the water is diverted before the Hindu by ^ xO Diine with the polymer! offset. 5. The method according to one or more of claims 1 to ■ ··. characterized in that by passing through the the polymer containing vasoers under pressure through a Nozzle forms a jet, so shot material into the jet and the jet containing the shooting material through the warp compartment. 6. The method according to one or more of claims 1 bio 4, characterized in that the Sehussmaterial and a solution of the polymer is guided simultaneously under pressure through a nozzle and directed to this ^v eiae formed, the shot material containing beam through the warp shed. 7 - 0098 10/1302 BATH ORIGINAL