EP0394986A2 - Ueberführungsapparat für Faden - Google Patents

Ueberführungsapparat für Faden Download PDF

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Publication number
EP0394986A2
EP0394986A2 EP90107817A EP90107817A EP0394986A2 EP 0394986 A2 EP0394986 A2 EP 0394986A2 EP 90107817 A EP90107817 A EP 90107817A EP 90107817 A EP90107817 A EP 90107817A EP 0394986 A2 EP0394986 A2 EP 0394986A2
Authority
EP
European Patent Office
Prior art keywords
traverse
yarn
stroke
center
traversing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90107817A
Other languages
English (en)
French (fr)
Other versions
EP0394986B1 (de
EP0394986A3 (de
Inventor
Takami Sugioka
Toshiyuki Ueno
Yo Sakai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nabtesco Corp
Original Assignee
Teijin Seiki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP11013389A external-priority patent/JP2618038B2/ja
Priority claimed from JP24276189A external-priority patent/JP2740968B2/ja
Application filed by Teijin Seiki Co Ltd filed Critical Teijin Seiki Co Ltd
Publication of EP0394986A2 publication Critical patent/EP0394986A2/de
Publication of EP0394986A3 publication Critical patent/EP0394986A3/de
Application granted granted Critical
Publication of EP0394986B1 publication Critical patent/EP0394986B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/28—Traversing devices; Package-shaping arrangements
    • B65H54/2836—Traversing devices; Package-shaping arrangements with a rotating guide for traversing the yarn
    • B65H54/2839—Traversing devices; Package-shaping arrangements with a rotating guide for traversing the yarn counter rotating guides, e.g. wings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/28—Traversing devices; Package-shaping arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • This invention relates a yarn traversing apparatus for obtaining a wound yarn package with a good wound shape and without cob-webbing at a high speed winding.
  • the present invention relates to a yarn traversing apparatus, which comprises at least one pair of rotary blades which rotate in opposite directions and which apparatus transfer the yarn between the blades.
  • the yarn When the yarn is moved from the center of traverse stroke toward the end of the traverse stroke, the yarn is moved behind the movement of the rotary blade by a distance equal to a distance from the position of the rotary blade to the point where the yarn reaches the contact roller multiplied by tan ⁇ , wherein ⁇ stands for a winding angle.
  • ⁇ stands for a winding angle.
  • the winding angle ⁇ is also reversed, and the movement of the yarn in a traversing direction is temporally stopped while the traverse motion is reversed.
  • high shoulders are generated at the ends of the obtained package. Accordingly, the yarn quality may be deteriorated because of the high shoulders, and cob-webbing may occur due to loosening of the yarn.
  • a traversing apparatus for traversing a yarn which is to be wound onto a bobbin to form a yarn package.
  • the yarn traversing apparatus of the present invention is installed in a yarn winding apparatus comprising a bobbin holder for inserting the bobbin thereon, a contact roller pressed onto the bobbin and the yarn traversing apparatus.
  • the yarn traversing apparatus of the present invention comprises: a first traverse means, which is disposed downstream by a predetermined distance from a fulcrum for traverse motion, for traversing the yarn from a center toward ends of traverse stroke; and a second traverse means, which is disposed downstream by a predetermined distance from the first traverse means, for traversing the yarn from the ends of traverse stroke toward the center of traverse stroke;
  • the first traverse means comprising a rotary blade moving from the center of traverse motion toward the ends of traverse stroke and a guide rail restricting a speed of the yarn conveyed by the rotary blade, so that speed of the yarn conveyed by the first traverse means is made substantially constant;
  • the second traverse means comprising a rotary blade moving from the ends of traverse stroke toward the center of traverse motion and a guide rail restricting a speed of the yarn conveyed by the rotary blade of the second traverse means, so that a speed of the yarn conveyed by the second traverse means is made almost same as that
  • the yarn is released from the first traverse means after the yarn is moved by the second traverse means to a position deviated toward the center of traverse stroke from an imaginary line connecting the first traversing means and a point where the yarn is in contact with the contact roller, when the yarn moved to the end of traverse stroke by the first traverse means is engaged with the second traverse means.
  • the yarn traversing apparatus it is preferred for the yarn traversing apparatus to be so arranged that following equations are satisfied.
  • S0 stands for stroke of the yarn wrapping around the contact roller
  • S1 stands for stroke of the first traverse means when it releases the yarn
  • S2 stands for stroke of the second traverse means at that time
  • L1 stands for a distance from the first traverse means to the wrapping point on the contact roller
  • L2 stands for a distance from the second traverse means to the wrapping point on the contact roller
  • ⁇ stands for a winding angle of the yarn.
  • Fig. 1 is a schematic view seen from the front of a winding apparatus of the present invention, after a yarn Y is drawn by a drawing apparatus (not illustrated), the yarn Y is fed through a snail guide 8, which serves as a fulcrum of traverse motion, and is wound by a winding apparatus 1.
  • Two bobbins 6 are inserted onto a bobbin holder 5 and are frictionally driven by the contact roller 4.
  • two yarns Y wrapping around the contact roller 4 are simultaneously wound onto the bobbins 6 to form two yarn packages 7.
  • the description below is done with reference to a yarn
  • the contact roller 4 is rotatably mounted on a frame 9 projecting from a slide block 2 which is vertically movable along the winding machine 1.
  • the frame 9 further has the traversing apparatus 3 mounted thereon above the contact roller 4, which apparatus performs the traversing operation.
  • the traversing apparatus 3 comprises a pair of units UL and UR which are horizontally disposed and which are detachably secured to the frame 9 by bolts 10.
  • each of the units UL and UR constituting the traversing apparatus 3 comprises two members U1 and U2, which are disposed upwardly and downwardly, respectively.
  • Fig. 3 is a detailed cross sectional view of one of the traverse units illustrated in Fig. 2.
  • the upward traverse unit U1 includes rotary blades 23 and 24 for traversing the yarn Y, and the downward traverse unit U2 also includes rotary blades 25 and 26 for traversing the yarn Y.
  • the frame 9 has an electric motor 43 disposed at the front end thereof.
  • the rotation of the motor 43 is transmitted to a gear 29 of the unit UL through a gear 44 which is attached to the output spindle of the motor 43.
  • the gear 29 engages with an adjacent gear 32, which in turn transmits the power to the unit UR.
  • Reference numerals 11a and 12a denote brackets formed at the upper and lower ends of spindles 11 and 12, respectively, which brackets serve to secure the rotary blade 23 of the upward traverse unit U1 and the rotary blade 25 of the downward traverse unit U2 to the spindles 11 and 12, respectively.
  • the rotary blades 23 and 24 of the upward traverse unit U1 which will be referred to as the first traverse means hereinbelow, are so arranged that they convey the yarn Y from the center of the traverse stroke to the ends of the traverse stroke.
  • the rotary blades 25 and 26 of the downward traverse unit U2 which will be referred to as the second traverse means hereinbelow, are so arranged that they convey the yarn Y from the ends of the traverse stroke to the center of the traverse stroke.
  • the traverse units U1 and U2 are so arranged that planes which are formed by the rotations of the blades 23, 24, 25 and 26 are perpendicular toa plane formed by the traversing motion of the yarn Y or that the former planes are inclined downward (in this embodiment 30°) in a feeding direction of the yarn Y relative to the latter plane formed by the traversing motion of the yarn Y.
  • a guide 37 (Fig. 2) is secured to the unit U1, and a guide 38 is secured to the unit U2.
  • the shape of guide rail 37a formed on the guide 37 is so selected that the yarn Y is traversed at a substantially constant speed along the guide rail 37a by the rotary blades 23 and 24.
  • the shape of the guide rail 38a formed on the guide 38 is so selected that when the yarn Y is conveyed by the rotary blades 25 and 26, a speed of the yarn Y conveyed by the rotary blades 25 and 26 is made almost same as that by the rotary blades 23 and 24 at the center of traverse motion and is gradually decreased from a speed between 1.5 and 7 times af that by the rotary blades 23 and 24 to that by the rotary blades 23 and 24 at the ends of traverse motion.
  • FIG. 2 show the rotational directions of the rotary blades.
  • the yarn Y is moved by the rotary blade 24 of the first traverse means from the center of traverse stroke toward one of the ends of traverse stroke. Then, the yarn Y moved to the end of traverse stroke is transferred to the rotary blade 26 of the second traverse means and is reversed from the end of traverse stroke toward a center of traverse stroke. Thereafter, traversing of the yarn Y moved toward the center of traverse stroke is taken over by the rotary blade 23 of the first traverse means, and when the yarn Y reaches the other end of traverse stroke, the yarn Y is transferred to the rotary blade 25 of the second traverse means. Thus, the yarn Y is again reversed toward the center of traverse stroke. The traversing operation is repeated in a foregoing manner.
  • the distance between the rotary blades 23 and 24, and 25 and 26 of the first and second traverse means may be the same.
  • a yarn Y is moved to the left by the rotary blade 24 of the first traverse means.
  • the yarn Y is moved to the left at an almost constant speed from the center of traverse stroke.
  • the yarn Y comes in contact with the rotary blade 26 which is rotating in the right.
  • the rotary blade 24 continues to move the yarn Y to the left.
  • the moving speed to the right of the rotary blade 26 of the second traverse means is seven times as large as the traversing speed V of the yarn Y near position denoted by 1.
  • the speed of the rotary blade 26 may be in a range between 1.5 to 7 times of the yarn speed V.
  • the yarn is moved by the rotary blade 26 to a position slightly deviated toward the center of traverse stroke from an imaginary line connecting a point, where the yarn is in contact with the contact roller 4, and the rotary blade 24. Then, the yarn Y engages with the guide rail 37a of the upward unit U1, and the yarn Y is released from the rotary blade 24.
  • the parameter L2 stands for a distance from the rotary blade 26 to the wrapping point on the contact roller 4.
  • the yarn Y which has been disengaged from the rotary blade 24, is gradually decreased its speed from an initial speed of 7V to a speed almost equal to V by the rotary blade 26 from a postion denoted by 2to a position beyond the position 2′ where the winding angle ⁇ is reversed, and then, the yarn Y is moved to the right by the rotary blade 26 as illustrated in 3 in Fig. 5.
  • the rotary blade 26 has an auxiliary blade portion 26a which is forked and with which the yarn Y is engaged.
  • the yarn Y is restricted by the grooved portion 26b of the rotary blade 26 when the yarn Y is released from the rotary blade 24 so that adverse influences caused by moment of inertia and unstableness caused by sudden changes in tension of the yarn Y when the yarn Y is disengaged from the rotary blade 24 are prevented.
  • the rotary blade 25 is similarly shaped.
  • the grooved portions 25b and 26b extend in a lengthwise direction of the rotary blades 25 and 26 and hold the yarn at a region from the end of the traverse stroke illustrated in Fig. 6 (a) to the center of the traverse stroke illustrated in Fig. 6 (b).
  • Fig. 6 (b) shows the transfer of the yarn Y at time 3 in Fig. 5
  • Fig. 6 (c) shows the transfer of the yarn Y at time 4 in Fig. 5.
  • the yarn Y When the yarn Y is transferred near the center of the traverse stroke as illustrated in 4in Fig. 5, the yarn Y engages with the rotary blade 23 of the first traverse means, which is disposed upwardly from the rotary blade 26 of the second traverse means by a predetermined distance, and the yarn Y is moved to the right at a speed V.
  • the yarn Y which has been conveyed by the rotary blade 26 and which is to be conveyed by the rotary blades 25 and 23, engages with the guide rail 38 of the downward traverse unit U2 as illustrated in Fig. 6 (c). Then, the yarn Y is disengaged from the rotary blade 26, and it is moved to the right by the rotary guide 23 of the first traverse means as illustrated in 5 in Fig. 5.
  • the yarn Y reaches the right end of the traverse stroke.
  • the yarn Y which has been conveyed by the rotary blade 23
  • the turning point (conditions denoted by 6 in Figs. 4 and 5)
  • it is engaged with the rotary blade 25 which is rotating to the left.
  • the rotary blade 23 continues to convey the yarn Y to the right.
  • the yarn Y engages with the guide rail 37a of the upper traverse unit U1 at a position where the yarn Y is slightly deviated by the rotary blade 25 form an imaginary straight line connecting the contacting point on the contacting roller 4 and the rotary blade 23, and the yarn Y is disengaged from the rotary blade 23.
  • the traverse stroke S1 is so selected that S1 ⁇ S0 + 2L1 tan ⁇
  • the traverse stroke S2 is so selected that S2 ⁇ S0 + 2L2 tan ⁇ .
  • the yarn Y disengaged from the rotary blades 23 is gradually decreased its speed from a speed of 7V to a speed of almost V by the rotary blade 25 until the winding angle is reversed in a manner similar to the above-described 2 , and 2′, and it is moved to the left as denoted by 7 in Fig. 4.
  • the yarn Y When the yarn Y is moved near the center of the traverse stroke as denoted by 8 in Fig. 4, it engages with the rotary blade 24, which is disposed upwardly from the rotary blade 25 by a predetermined distance, and it is conveyed at a speed V by the rotary blade 24.
  • the yarn Y which has been conveyed by the rotary blade 25 and which is to be conveyed by the rotary blade 24, engages with the guide rail 38 of the downward traverse unit U2. Then, the yarn Y is disengaged from the rotary blade 25, and it is moved to the left by the rotary blade 24 as illustrated by 1 in Fig. 4.
  • the yarn speeds during the above-described traversing operation are set by combinations in the shapes of the rotary blades 24 and 23 and the guide rail 37a, and the rotary blades 25 and 26 and the guide rail 38a.
  • the difference in hardness of the outer periphery of the obtained package is small in the entire width of the package in order to minimize the uneveness in the yarn quality and to enhance the strength of the package.
  • the yarn conveying speeds of the rotary blades are specially designed. As a result, the difference in hardness of the outer periphery of the obtained package can be small according to the present invention.
  • Figs. 7 (a) to 7 (f) are diagrams showing the relationships between the traverse strokes and the yarn conveying speeds of the rotary blades, wherein the abscissa, i.e., X-axis, denotes the traverse stroke, and the ordinate, i.e., Y-axis denotes the speed ratio (a broken line) of the first traverse means to the traverse speed at the center of the traverse stroke and the speed ratio (a solid line) of the second traverse means to the traverse speed at the center of the traverse stroke.
  • Reference numeral A denotes the position where the winding angle is reversed at the end of the traverse stroke.
  • Figs. 8 (a) to 8 (f) show the hardness of the packages obtained by the speed illustrated in Figs. 8 (a) to 8 (f).
  • the abscissa i.e., X-axis, denotes the width of the package, B denotes the end of the package, C denotes the center of the package, and only left half is illustrated since the package hardness is almost symmetrical for the left and right portions of the package.
  • the ordinate i.e., Y-axis
  • the ordinate denotes the package hardness which is a mean value of six packages measured by "Yarn Hardness” manufactured by Nakaasa Sokki, in Japan, at every 5 mm from the end of the packages. Since the hardness at position B, which is the ends of the packages, cannot be measure, the value at the position 5mm away from the position B is substituted therefor.
  • the data illustrated in Fig. 8 are obtained under the following winding conditions. Polyester drawn yarn of 75 de/36 filaments with a circular cross section is wound at a speed 5,600 m/min at a winding angle of 6.8° under a winding contacting pressure of 16 kg, at a winding tension between 14 and 16 g.
  • the winding machine is of a spindle drive type, wherein six packages are wound on a single bobbin holder.
  • Figs. 7 (a) to 7 (c) the traverse speed of the first traverse means is almost constant, and the traverse speed of the second traverse means is increased to a value 2 to 7 times as large as that of the first traverse means at the end of the traverse stroke and is gradually decreased before the point A.
  • the package hardness of the obtained packages are correspondingly illustrated in Figs. 8 (a) to 8 (c).
  • the traverse speed of the second traverse means is decreased beyond that of the first traverse means at the center of the traverse stroke in order to minimize the difference in the package hardness.
  • the speed of the second traverse means is decreased by 5 % relative to the constant speed
  • the speed of the second traverse means is decreased by 8 % relative to the constant speed
  • the package hardness of the obtained packages are correspondingly illustrated in Figs. 8 (d) and 8 (e).
  • Fig. 7 (f) show the winding under the traverse speeds of the first and second traverse means are almost constant, and package hardness is illustrated in Fig. 8 (f).
  • the decrease of the traverse speed at the center of the traverse stroke is performed by the second traverse means, however, it may be done only by the first traverse means, or by both the first and the second traverse means.
  • the distance between the rotary blades 25 and 26 is larger than that of the rotary blades 23 and 24, the distances may be equal.
  • rotary blades are integrally formed.
  • holder 40 and yarn guide 41 which is, for example, made of ceramic, are separately formed and are secured to each other by bolts 42.
  • the holder 40 and the yarn guide 41 may be rivetted 43 or secured by bolts, and the holder 40 may have an engaging shoulder portion 40a which receives centrifugal force.
  • the holder 40 and the yarn guide 41 are separated and are rivetted 44 or secured by bolts, and an engaging portion is formed in a circular recess so as to receive centrifugal force.
  • the yarn Y is securely guided into the grooved portion of the rotary blades 25 and 26 and is prevented from being pushed outwardly, i.e., downward direction in Fig. 11, by the rotary blades 25 and 26.
  • the yarn When the distance between the first traverse means and the second traverse means is excessively small, for example a distance between 5 and 10 mm in a conventional machine, the yarn may be rubbed between the rotary blades of both the traverse means, and accordingly, the obtained yarn may be remarkably deteriorated since fluffs may be created, and since uneveness in strength of the yarn may occur. It is preferred that the distance between the first and second traverse means is set between 15 and 70 mm.
  • the traversing apparatus is used to simultaneously wind two packages onto a bobbin holder
  • the number of the bobbins may be one or more than two.
  • the winding apparatus may be of an automatic type which has a plurality of bobbin holders.
  • the rotary blades 25 and 26 have recess portions 26b, the portion 26b in Fig. 6 may be omitted while the portion 26a is formed.
  • a wound yarn package with a good wound shape and without cob-webbing can be obtained at a high speed winding, and uneveness in the yarn quality of the obtained yarn can be prevented.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Winding Filamentary Materials (AREA)
EP90107817A 1989-04-28 1990-04-25 Ueberführungsapparat für Faden Expired - Lifetime EP0394986B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP11013389A JP2618038B2 (ja) 1989-04-28 1989-04-28 糸条のトラバース装置
JP110133/89 1989-04-28
JP24276189A JP2740968B2 (ja) 1989-09-19 1989-09-19 糸条のトラバース装置
JP242761/89 1989-09-19

Publications (3)

Publication Number Publication Date
EP0394986A2 true EP0394986A2 (de) 1990-10-31
EP0394986A3 EP0394986A3 (de) 1992-10-28
EP0394986B1 EP0394986B1 (de) 1994-11-09

Family

ID=26449812

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90107817A Expired - Lifetime EP0394986B1 (de) 1989-04-28 1990-04-25 Ueberführungsapparat für Faden

Country Status (4)

Country Link
EP (1) EP0394986B1 (de)
KR (1) KR950005416B1 (de)
CN (1) CN1023784C (de)
DE (1) DE69013967T2 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142886A1 (de) * 1990-12-28 1992-07-02 Murata Machinery Ltd Changiervorrichtung
DE4317087A1 (de) * 1993-05-21 1994-11-24 Neumag Gmbh Vorrichtung zum Aufwickeln von Fäden
DE4315912C2 (de) * 1992-05-15 2003-01-23 Barmag Barmer Maschf Aufspulmaschine
WO2019193117A1 (en) 2018-04-04 2019-10-10 Katholieke Universiteit Leuven Reaction of glycolaldehyde

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4711103B2 (ja) * 2003-03-28 2011-06-29 村田機械株式会社 糸の巻き取り方法とその装置
EP1681259A3 (de) * 2005-01-15 2007-05-09 Rieter Ingolstadt Spinnereimaschinenbau AG Unidirektionale Antriebsvorrichtung für Fadenchangierer

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1925678A1 (de) * 1968-05-20 1969-12-18 Toyo Rayon Company Ltd Verfahren und Vorrichtung mit rotierenden Messern zum Hin- und Herbewegen eines Fadens beim Aufwickeln einer Spule od.dgl.
DE3243985A1 (de) * 1981-12-03 1983-06-16 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Changiereinrichtung
EP0102849A1 (de) * 1982-09-08 1984-03-14 Toray Industries, Inc. Vorrichtung zum Aufwinden von Garn
EP0114641A1 (de) * 1983-01-19 1984-08-01 b a r m a g Barmer Maschinenfabrik Aktiengesellschaft Aufspulmaschine mit Flügelchangierung
EP0382104A2 (de) * 1989-02-04 1990-08-16 TEIJIN SEIKI CO. Ltd. Changierfadenführer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1925678A1 (de) * 1968-05-20 1969-12-18 Toyo Rayon Company Ltd Verfahren und Vorrichtung mit rotierenden Messern zum Hin- und Herbewegen eines Fadens beim Aufwickeln einer Spule od.dgl.
DE3243985A1 (de) * 1981-12-03 1983-06-16 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Changiereinrichtung
EP0102849A1 (de) * 1982-09-08 1984-03-14 Toray Industries, Inc. Vorrichtung zum Aufwinden von Garn
EP0114641A1 (de) * 1983-01-19 1984-08-01 b a r m a g Barmer Maschinenfabrik Aktiengesellschaft Aufspulmaschine mit Flügelchangierung
EP0382104A2 (de) * 1989-02-04 1990-08-16 TEIJIN SEIKI CO. Ltd. Changierfadenführer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142886A1 (de) * 1990-12-28 1992-07-02 Murata Machinery Ltd Changiervorrichtung
DE4315912C2 (de) * 1992-05-15 2003-01-23 Barmag Barmer Maschf Aufspulmaschine
DE4317087A1 (de) * 1993-05-21 1994-11-24 Neumag Gmbh Vorrichtung zum Aufwickeln von Fäden
WO2019193117A1 (en) 2018-04-04 2019-10-10 Katholieke Universiteit Leuven Reaction of glycolaldehyde
US11851390B2 (en) 2018-04-04 2023-12-26 Taminco Bvba Reaction of glycoladehyde

Also Published As

Publication number Publication date
KR950005416B1 (ko) 1995-05-24
CN1046718A (zh) 1990-11-07
DE69013967T2 (de) 1995-06-22
EP0394986B1 (de) 1994-11-09
KR900016034A (ko) 1990-11-12
DE69013967D1 (de) 1994-12-15
EP0394986A3 (de) 1992-10-28
CN1023784C (zh) 1994-02-16

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