US3494527A - Web stretching devices having silicone resin surfaces - Google Patents

Web stretching devices having silicone resin surfaces Download PDF

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Publication number
US3494527A
US3494527A US705951A US3494527DA US3494527A US 3494527 A US3494527 A US 3494527A US 705951 A US705951 A US 705951A US 3494527D A US3494527D A US 3494527DA US 3494527 A US3494527 A US 3494527A
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United States
Prior art keywords
web
weight
organopolysiloxane
resin
clamp
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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.)
Expired - Lifetime
Application number
US705951A
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English (en)
Inventor
Ignaz Bauer
Rudolf Riedle
Siegfried Nitzsche
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Wacker Chemie AG
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Wacker Chemie AG
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Publication date
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Publication of US3494527A publication Critical patent/US3494527A/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C3/00—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics
    • D06C3/02—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics by endless chain or like apparatus
    • D06C3/04—Tentering clips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/022—Registering, tensioning, smoothing or guiding webs transversely by tentering devices
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C3/00—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C2700/00—Finishing or decoration of textile materials, except for bleaching, dyeing, printing, mercerising, washing or fulling
    • D06C2700/10—Guides or expanders for finishing

Definitions

  • the present invention related to textile coating equipment or other web feeding equipment wherein widths of the web are stretched by wedging contact with the edges of the web, and more particularly relates to prevention of build-up of deposits on the web contacting surfaces.
  • At least the portion of the clamp surfaces which come into contact with the web of material passing through the clamps consists of a cured organopolysiloxane resin such as those known for the preparation of molded articles, and which has a content of between 35 and 900 percent by weight calculated on the weight of the organopolysiloxane resins, of fillers which term includes reinforcing agents.
  • the layer of organopolysiloxane resin is between 0.5 and 3 mm. in thickness.
  • the present invention avoids the above disadvantages. No deposits, or at least none that are difficult to remove, can form on the stretching devices of the present invention even when these devices are run at temperatures of up to 220 C. Furthermore, the resin does not rub off on the web and thereby create problems with further processing, nor is it eliminated from the surfaces of the clamping devices during operation.
  • FIG. 1 is a somewhat diagrammatic view in perspective of a web being fed through a treating roller and being held taut by clamping devices according to the present invention
  • FIG. 2 is a fragmentary view of a portion of the system shown in FIG. 1 showing the position of one of the clamping devices made according to the present invention.
  • FIG. 3 is a fragmentary view partly in cross-section showing an elevation of one of the clamping devices shown in FIG. 1 or 2.
  • FIG. 1 a web 11 which may be, for example, a textile being fed through a treatment roller 12 driven by a motor 13.
  • the web 11 is held stretched in a width-wise direction by a plurality of pinchers or clamping devices 14 positioned at the edges of the web.
  • the web 11 is provided with a selvage 16 at each edge, which selvage is kept in position by a presser foot 17 of the clamping device 14 in contact with the web.
  • Biasing means such as a spring 18 are provided to maintain the presser foot 17 in constant wedging contact wtih the web 11.
  • a pivot pin 19 is preferably provided to allow the presser foot 17 to be raised for insertion of a new web whenever such is desired.
  • the web 11 passes over a table 21 which serves to support the web 11 and offer counterpressure to the presser foot 17.
  • Both the presser foot 17 and the table 21 are conventionally made of metal material.
  • the web contacting surfaces are provided with a layer of organopolysiloxane resin having a filler therein, the layer being shown in the drawing as 22.
  • a layer of like material 23 is applied to the opposing surface of the table 21.
  • the organopolysiloxane resin should have a filler or reinforcing agent content between 35 and 900 percent by weight, calculated on the weight of the organopolysiloxane resins.
  • the shape or form of the stretching devices can be any of those used in known clamps on present machines. It is generally sufficient if only those portions of the presser foot 17 by which the web is contacted and the portions of the table, lying in juxtaposition thereto, are coated with the resin containing fillers. Preferably such layer is between 0.5 and 3 mm. thick, although thicker layers may also be provided. If desired, the presser foot or portions thereof may be molded entirely of the resin-filler combination.
  • the known organopolysiloxane resins which are used for preparing the stretching devices of the present invention are those known for the preparation of molded articles and which are cured at temperatures above 100 C. when they are employed for preparing pressure molded articles.
  • Those organopolysiloxane resins consisting of (a) 0.1 to mol percent units of the formula R SiO wherein each R is a methyl or phenyl radical, (b) 99.9 to mol percent units of the formula R SiO, wherein each R is a vinyl, methyl or phenyl radical, and optionally, (c) units of the formula RSiO wherein R is as above defined, and wherein 2.0 to 3.5 mol siloxane units with vinyl groups are present per kilogram of organopolysiloxane, having a viscosity of 200 to 20,000 cs./25 C.
  • organopolysiloxane resins are especially suitable.
  • the quantity of (0) units in mol percent is taken from the difference of the sums of the (a) and (b) units present in mol percent to 100.
  • radical formers such as dicumylperoxide, cumene hydroperoxide, 2,2-bis (tert-butylperoxy)-butene, tert-butyl perlaurinate, tert-butylperbenzoate and tert-butylhydroperoxide by heating to between 140 and 250 C.
  • R is as above defined, R" is an alkyl radical with 1 to 4 carbon atoms, generally methyl or ethyl, x, y, z are 0, 1, 2, or 3, the sum of x+y+z is not greater than 3, the average value of x is 0.9 to 1.7, the average values of y and z are 0.00 to 0.20, where y and z must, of course, not be 0.00 at the same time.
  • these vinyl-group-free organopolysiloxane resins contain not more than mol percent of units wherein x is 2 or 3, and preferably their viscosity in 50 percent toluene solution does not exceed 1000 cs./ 25 C.
  • These organopolysiloxane resins are cured by heating to between 90 and 25 0 C., optionally with the use of condensation catalysts, as they are commonly used for curing vinyl-group-free organopolysiloxanes, for example, triethanolamine titanate, lead and/or zinc naphthenate, and/ or superatmospheric pressure.
  • organopolysiloxane resins described here are already known to those skilled in the art. organopolysiloxane resins of the type described here are commercially available.
  • fillers and reinforcing agents which heretofore have been or could have been used for the preparation of molded organopolysiloxane resin articles can also be used for the present discovery. This includes use of known fillers (which term is used herein to include reinforcing agents) for organopolysiloxanes which will cure to non-elastomeric articles.
  • suitable fillers are silicon dioxide obtained pyrogenically in the gas phase, silicic acid hydrogel dehydrated while maintaining the structure, precipitated silicon dioxide, quartz flour, mica flour, pure, white fibrous magnesium silicate occurring in nature, asbestos in the form of, for example, powders, fibers, cloths or foils; zirconium silicate, titanium dioxide, aluminum oxide, glass in the form of powders, threads, fibers, yarns, cloths or foils; ground porcelain dishes, i.e., the so-called shard flour; iron powder and aluminum powder.
  • the organopolysiloxane resins used within the framework of the present invention may contain solvents conventionally used for the processing of organopolysiloxane resins before curing.
  • solvents are hydrocarbons such as toluene, xylene, and trimethylbenzene; chlorohydrocarbons such as trichloroethylene; ethers such as di-n-butylether; alcohols, such as ethanol; and ketones such as methyl ethyl ketone.
  • hydrocarbons such as toluene, xylene, and trimethylbenzene
  • chlorohydrocarbons such as trichloroethylene
  • ethers such as di-n-butylether
  • alcohols such as ethanol
  • ketones such as methyl ethyl ketone
  • organopolysiloxane resins used within the framework of the present discovery can also contain conventionally used additives such as heat stabilizers and soluble dyes.
  • the fillers, the optional or requisite hardeners which are used and all of the optionally used other additives are incorporated in the organopolysiloxane resins.
  • Example 1 The surfaces of the metal clamp and juxtaposed metal table surface for a stretching frame which are designed to face the textile web are roughened in the known manner by sand blasting.
  • Heat cleaned glass cloth is cut into pieces of the same size as the areas of the clamp and table which will be in contact with the textile. These pieces weigh 1.5 g. each.
  • One of these pieces is placed on the organopolysiloxane coated side of the clamp table and the abovedescribed mixture of organopolysiloxane resin and dicumyl peroxide is poured over it (again about 0.2 g. resin per clamp table).
  • the applied material is cured by heating for 3 hours to C. and further heating to 200 C. for 3 hours.
  • a smooth layer is obtained which is very stable to mechanical strain, and to which neither dyes nor textile finishing agents will adhere.
  • the nominal residues of dyes and other deposits can be readily and rapidly removed by washing with water containing a wetting agent or simply by rubbing, after having been in use for some time in a textile stretching frame, operating at temperatures between and 200 C.
  • Example 2 33 parts by weight of the organopolysiloxane described in Example 1 are mixed while heating to 70 C. with 1 part by weight of dicumyl peroxide and 66 parts by weight of shard (ground porcelain) flour. The mixture thus obtained is formed into clamping surfaces of the clamp and table by pouring and is cured as described in Example 1.
  • the clamp-table thus obtained is similar in characteristics to that set forth in Example 1. Similar results are obtained when a clamp-table is prepared as described above, with the exception that in place of the 66 parts by weight of shard flour, 100 parts by weight of zirconium silicate are used. The resulting clamp-table can be kept clean without difficulty.
  • Example 3 An organopolysiloxane resin is prepared as follows: A mixture of 90 parts by weight of methyltrichlorosilane and parts by weight of dimethyldichlorosilane is added, while stirring, to 70 parts by weight ethanol. To the mixture thus obtained, 15 parts by weight of Water are added slowly while stirring is continued. After 10 minutes, 90 parts by weight of toluene and 50 parts by weight of water are added while still stirring. The stirrer is shut off, the aqueous phase is discarded and the toluene phase is cleared of hydrogen chloride by washing with water. The toluene is distilled 01f.
  • the organopolysiloxane remaining as a residue after this distillation is mixed with 1.4 parts by weight of a paste containing 0.5 part by weight of boric acid and 0.9 part by weight of methanol and heated to 150 C. until a 50 percent by weight of a toluene solution of this resin has a viscosity of ca./ 80 cs./ C. (75:10 sec. with a DIN cup having an opening of 2 mm).
  • the organopolysiloxane is then dissolved in an equal quantity by weight of toluene and filtered.
  • Heat cleaned glass cloth is saturated with the above prepared weight percent solution of organopolysiloxane resin in toluene, until it has absorbed about percent by weight, calculated on the weight of the cloth, of organopolysiloxane.
  • the cloth is then dried at to C. in a drying tower.
  • Four layers are placed over each other, with the warp thread alternating at an angle of 90 to each other in adjacent layers.
  • the glass cloth thus impregnated is heated to C. for 2 hours at a pressure of 50 kg./cm. it is then allowed to cool to 60 C. and removed from the press. Finally, the laminate is heated for another 2 hours to 250 C.
  • the laminate After cooling, the laminate is cut into pieces, with which the portions of the metal clamp are covered.
  • the laminate is attached to the clamp and table with screws. After 600 hours in a textile dryer its properties are still unchanged, and it can easily be cleaned,
  • Example 4 20 parts by weight of the organopolysiloxane described in Example 1 are mixed while heating to 80 C. with 79 parts by weight of iron powder and 1 part by weight of dicumyl peroxide. The mixture thus obtained is cured by pouring in the form of a contact ledge of a clamp and cured as described in Example 1.
  • a surface on those portions of the clamping device which are designed to be contacted by the moving web made of a cured organopolysiloxane resin having a filler content of between 35 and 900 percent by weight based on the weight of the organopolysiloxane resin.
  • the filler includes a glass cloth reinforcement.
  • said filler containing organopolysiloxane resin comprises a layer between 0.5 mm. and 3 mm. in thickness over those portions of the clamping device which are to be contacted by the moving web.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Reinforced Plastic Materials (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
US705951A 1967-02-21 1968-02-16 Web stretching devices having silicone resin surfaces Expired - Lifetime US3494527A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW0043407 1967-02-21

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US (1) US3494527A (de)
BE (1) BE710992A (de)
DE (1) DE1635364B1 (de)
FR (1) FR1555998A (de)
GB (1) GB1186828A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647128A (en) * 1969-09-17 1972-03-07 Burroughs Corp Web-tensioning device
US4076161A (en) * 1976-05-10 1978-02-28 Scribner Albert W Stock feeder for punch presses and the like
FR2384687A1 (fr) * 1977-03-22 1978-10-20 Dornier Gmbh Lindauer Dispositif de nettoyage des surfaces de serrage, notamment d'une rame a pinces
US4636090A (en) * 1985-05-22 1987-01-13 Theta Industries, Inc. Low temperature dilatometer
US4658482A (en) * 1985-08-26 1987-04-21 E. I. Du Pont De Nemours And Company Tenter frame clip
US4896405A (en) * 1988-01-21 1990-01-30 Marshall And Williams Company Tenter clip
US5488467A (en) * 1994-06-24 1996-01-30 Rjs, Inc. Laser printer paper handling system
US5996195A (en) * 1998-07-20 1999-12-07 Morrison Berkshire, Inc. Cross machine tensioning system and method
CN108557549A (zh) * 2018-04-24 2018-09-21 东莞顺裕纸业有限公司 一种瓦楞纸检测平整装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4939825A (en) * 1989-05-10 1990-07-10 Mobil Oil Corporation Lightweight tenter frame clip
DE8915880U1 (de) * 1989-08-10 1991-11-14 Brueckner Trockentechnik Gmbh & Co Kg, 7250 Leonberg, De
JP6086995B2 (ja) 2012-12-20 2017-03-01 ブリュックナー・マシーネンバウ・ゲーエムベーハー・ウント・コー・カーゲー 延伸装置
DE102012025487A1 (de) 2012-12-20 2014-06-26 Brückner Maschinenbau GmbH & Co. KG Transportsystem, insbesondere Querreckanlage
DE102012025486A1 (de) * 2012-12-20 2014-06-26 Brückner Maschinenbau GmbH & Co. KG Kluppen-Transporteinheit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1703586A (en) * 1927-08-15 1929-02-26 Charles P Jahnke Feeding apparatus for ironing machines
US2774593A (en) * 1952-12-02 1956-12-18 Armco Steel Corp Apparatus for guiding strip material
US3110439A (en) * 1960-04-25 1963-11-12 Holley Carburetor Co Tape feeding mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1703586A (en) * 1927-08-15 1929-02-26 Charles P Jahnke Feeding apparatus for ironing machines
US2774593A (en) * 1952-12-02 1956-12-18 Armco Steel Corp Apparatus for guiding strip material
US3110439A (en) * 1960-04-25 1963-11-12 Holley Carburetor Co Tape feeding mechanism

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647128A (en) * 1969-09-17 1972-03-07 Burroughs Corp Web-tensioning device
US4076161A (en) * 1976-05-10 1978-02-28 Scribner Albert W Stock feeder for punch presses and the like
FR2384687A1 (fr) * 1977-03-22 1978-10-20 Dornier Gmbh Lindauer Dispositif de nettoyage des surfaces de serrage, notamment d'une rame a pinces
US4636090A (en) * 1985-05-22 1987-01-13 Theta Industries, Inc. Low temperature dilatometer
US4658482A (en) * 1985-08-26 1987-04-21 E. I. Du Pont De Nemours And Company Tenter frame clip
US4896405A (en) * 1988-01-21 1990-01-30 Marshall And Williams Company Tenter clip
US5488467A (en) * 1994-06-24 1996-01-30 Rjs, Inc. Laser printer paper handling system
US5996195A (en) * 1998-07-20 1999-12-07 Morrison Berkshire, Inc. Cross machine tensioning system and method
CN108557549A (zh) * 2018-04-24 2018-09-21 东莞顺裕纸业有限公司 一种瓦楞纸检测平整装置
CN108557549B (zh) * 2018-04-24 2019-07-09 东莞顺裕纸业有限公司 一种瓦楞纸检测平整装置

Also Published As

Publication number Publication date
FR1555998A (de) 1969-01-31
BE710992A (de) 1968-07-01
DE1635364B1 (de) 1971-12-16
GB1186828A (en) 1970-04-08

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