US3019132A - Process for increasing the frictional resistance between threads, yarns and the like of synthetic linear polyamides and product made thereby - Google Patents

Process for increasing the frictional resistance between threads, yarns and the like of synthetic linear polyamides and product made thereby Download PDF

Info

Publication number
US3019132A
US3019132A US634420A US63442057A US3019132A US 3019132 A US3019132 A US 3019132A US 634420 A US634420 A US 634420A US 63442057 A US63442057 A US 63442057A US 3019132 A US3019132 A US 3019132A
Authority
US
United States
Prior art keywords
polyamide
fibres
threads
yarns
frictional resistance
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.)
Expired - Lifetime
Application number
US634420A
Other languages
English (en)
Inventor
Gabler Rudolf
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.)
Inventa AG fuer Forschung und Patentverwertung
Original Assignee
Inventa AG fuer Forschung und Patentverwertung
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
Application filed by Inventa AG fuer Forschung und Patentverwertung filed Critical Inventa AG fuer Forschung und Patentverwertung
Application granted granted Critical
Publication of US3019132A publication Critical patent/US3019132A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/59—Polyamides; Polyimides
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06Q—DECORATING TEXTILES
    • D06Q1/00—Decorating textiles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2933—Coated or with bond, impregnation or core
    • Y10T428/2964—Artificial fiber or filament
    • Y10T428/2967—Synthetic resin or polymer
    • Y10T428/2969—Polyamide, polyimide or polyester

Definitions

  • the present invention relates to a process for increasing the frictional resistance between elements, such as threads, yarns and the like of synthetic linear polyamides and to the product made by this process.
  • Synthetic fibres made from synthetic linear polyamides have an absolutely smooth surface when they are of circular cross-section. They, therefore, differ fundamentally from natural fibres such as wool, cotton, silk etc. which have a rough scaly surface structure.
  • the processes of the first group consist in impregnation with resin, for which purpose natural resins, but for the most part artificial resins, have been proposed.
  • resin for which purpose natural resins, but for the most part artificial resins, have been proposed.
  • the second group comprises those processes in which a certain amount of roughness is imported to the fibres by superficial application of fine-grained mineral substances.
  • the method of increasing the resistance to slipping by application of a resin dressing has the disadvantage that the nature of the fibres is altered by the impregnation and this in many cases is undesirable.
  • most of the artificial resin dressings which are applied affect the stiffness of the fibres or yarns; others af- 2 feet their swelling properties, their elasticity, electrostatic behaviour etc. to an undesirable extent.
  • the frictional resistance between fibres or threads of synthetic linear polyamides is greatly improved by treating them with a dispersion of a fine-grained polyamide powder in a polyamide adhesive.
  • the adhesive may be in fine liquid dispersion as in the form of a solution or emulsion.
  • All thread-like structures made from any known types of polyamide are suitable for treatment by the process of the invention, for example, those of polycaprolactam, polyhexamethylenediammoniumadipate and poly w aminoundecanoic acid.
  • the filament or thread-like structure can be in the form of twisted or untwisted endless yarns or monofils or cup staple.
  • the polyamide powder which is to be adhered to the fibres can consist of the same material as the fibres. It is advantageous however, .to use those polyamides which have high swelling properties such as, for example, po1ycaprolactam or mixed polyamides consisting of two or three different polyamide-forming components.
  • the manufacture of the polyamide powder takes place in the usual manner by cutting fine-fibred yarn waste or by grinding granular material in a colloid mill.
  • Very fine powder can be made by a wet method in accordance with US. Patent No. 2,639,278 by dissolving the polyamide in a suitable solvent and recovering it in a finegrained form by cooling. From the crude powder obtained fractions of uniform grain size down to below l,u (micron) diameter can be obtained by screening or with an air separator.
  • the powders used in the method of the invention have, in general, a grain size, which is smaller than 40 and which is small relative to the diameter of the thread-like structure to be treated; preferably it is less than one-tenth of the thickness of the thread.
  • the powder is suspended in a solution or emulsion of a suitable polyamide adhesive and protective colloid or wetting agent may be added for the purpose of stabilizing the suspension.
  • a suitable polyamide adhesive and protective colloid or wetting agent may be added for the purpose of stabilizing the suspension.
  • protective colloid non-ionogenous condensation products of ethylene oxide are suitable.
  • polyamide adhesive agents can be used for fixing the powder to the surface of the thread-like structure. These are, for example, the alcohol-soluble mixed polyamides.
  • soluble polyamides on the basis of dilinoleic acid and diamines, the methylol and alkoxymethyl polyamides modified by formaldehyde and thereby made soluble, phenol-formaldehyde resins in their resolution stage, polyisocyanate adhesives, combinations of resorcinol or pyrocatechol with aldehydes, for
  • propionic aldehyde solution polyvinyl acetate and various polyvinyl acetals such as polyvinylformal and polyvinyl butyral, amongst others.
  • the method by which the process of the invention is carried out depends to a large extent on the kind of fibrous material to be treated. Endless yarns and thin monofils up to about 300 denier can be treated on the usual single thread dressing machines, in which the threads are passed over rollers wetted with the powder dispersion.
  • the drying of the treated yarn preferably takes place directly on the bobbin of the dressing machine at a temperature of 20- 50 C. However, a heating chamber may adjoin the dressing machine and the dressed yarn can be dried either before or while it is running on to the bobbin.
  • Coarse twisted yarns and monofils of more than 300 denier are passed continuously through a bath containing the powder dispersion and then through a heating pipe or heating chamber, several metres in length, in which the solvent or the liquid of the dispersion is evaporated.
  • the adhesive used is a duroplast, for example, on the basis of phenols and aldehydes
  • the drying process is preferably carried out in such a way that hardening of the adhesive already takes place in the heating zone.
  • the method of the invention results in the production of polyamide fibres, threads, yarns and monofilshaving a durable roughened surface. It is particularly to be noted that the inter fibre friction is increased but the cofefiicient of friction on bright metal surfaces is reduced. This will now be explained with the aid of some numerical examples.
  • Untreated threads of poly-e-caprolactam have a coefficient of friction of 0.30.35 on polished steel.
  • the coefiicient of friction of thread to tthread is only 0.14-0.16, which explains the small resistance to slipping of the untreated yarn.
  • the same threads When treated with a powder dispersion in accordance with the invention, the same threads have a coefiicient of friction to steel of 01-015 and of thread to thread of 0.250.5.
  • the treated material therefore, has a distinctly increased resistance to relative slipping of the threads but slides more easily over smooth surfaces, rods, thread guides, eyes and the like made of steel, ceramic materials or other substances which is very desirable in the further treatment process.
  • Example 1 A stretched yarn of poly-e-caprolactam made up of 40 threads with a total titre of 240 denier is drawn off from a conical bobbin, passed through a tensiouing device by which the thread tension is adjusted to 20 g., and guided tangentially along a dressing roller which dips into the dressing liquid and is finally wound on a cylindrical perforated aluminium bobbin.
  • the yarn is drawn off at a speed of l120 metres per minute during the dressing.
  • the dressing liquid consists of 5% solution of a polyamide made from dilinoleic acid and ethylene diamine in a toluene-isopropanol mixture in which are suspended of a powder of poly-e-caprolactam of an average grain size of 511..
  • the treated yarn is dried by allowing it to stand for 48 hours at 40 C. and 45% relative humidity and then has a durable dressing of 3.5% of the original weight of the yarn.
  • the coefiicient of friction of the yarn on bright steel amounts to 0.135 as compared with its previous coefficient of 0.312 and a coefficient of friction of thread to thread of 0.274 as compared with its previous coefficient of 0.128.
  • Example 2 A twisted yarn of caprolactam polyamide of a total titre of 2,200 denier and a structure of 250/40 8-32-38 is drawn off at a speed of 10 metres per minute from a bobbin and passed through a tension regulating device which gives it a pre-tension of 0.81.0 kg. The yarn is then guided by means of two deflecting rollers through a treatment bath and then through a tube which is two metres in length and heated to 300 C., after which it is wound on a drum.
  • the treatment bath contains a 10% aqueous emulsion of polyvinyl acetate in which are dispersed 15% of a powder of poly-ecaprolactam having an average grain size of 30
  • the treated yarn contains 5% of a rough dressing which adheres well to it and has a coefficient of friction of 0.420 (thread to thread) as compared with a coefficient of 0.136 in the untreated condition.
  • Example 3 A monofil of polyhexamethylenediammoniumadipate of 1.2 mm. diameter is treated with a powder dispersion in an apparatus similar to that used in Example 2 at a speed of 14.5 metres per minute and a pre-tension of 2.65 kg., and then dried and reeled.
  • the treatment liquid consists of an 8% methanol solution of a resorcinol-propionic aldehyde adhesive in which 13.5% of a powdered mixed polyamide consisting of 60 parts of hexamethylenediammoniumadipate and 40 parts of caprolactam with an average grain size of 30,11. are suspended.
  • the treated monofil has a 6.5% layer which imparts to it a good resistance to slipping.
  • the coefficient of friction of monofil to monofil amounts to 0.285 as compared with the previous coefficient of 0.118.
  • a process for increasing the frictional resistance between filaments of a synthetic linear polyamide which comprises treating the filaments with a dispersion of a fine-grained powder composed of said polyamide and in solid particle form in fine liquid dispersion in an organic polyamide-binding adhesive and drying the filaments to bond said powder in solid particle form on said filaments to roughen thereby the surfaces of said filaments.
  • a synthetic linear polyamide filament having a coating in the form of a powder composed of the same polyamide and bonded to the surface of said filament in solid particle form by adhesive to render the surface discontinuous and rough and to increase thereby frictional resistance between filaments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US634420A 1956-01-21 1957-01-16 Process for increasing the frictional resistance between threads, yarns and the like of synthetic linear polyamides and product made thereby Expired - Lifetime US3019132A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH821266X 1956-01-21

Publications (1)

Publication Number Publication Date
US3019132A true US3019132A (en) 1962-01-30

Family

ID=4539462

Family Applications (1)

Application Number Title Priority Date Filing Date
US634420A Expired - Lifetime US3019132A (en) 1956-01-21 1957-01-16 Process for increasing the frictional resistance between threads, yarns and the like of synthetic linear polyamides and product made thereby

Country Status (7)

Country Link
US (1) US3019132A (enrdf_load_stackoverflow)
BE (1) BE553285A (enrdf_load_stackoverflow)
CH (1) CH339175A (enrdf_load_stackoverflow)
DE (1) DE1092877B (enrdf_load_stackoverflow)
FR (1) FR1171463A (enrdf_load_stackoverflow)
GB (1) GB821266A (enrdf_load_stackoverflow)
NL (2) NL213472A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3217989A (en) * 1961-07-13 1965-11-16 Sewing Silks Ltd Synthetic polymeric sewing threads packages
US3399079A (en) * 1964-09-25 1968-08-27 American Cyanamid Co Antistatic fiber blend
US3492142A (en) * 1965-06-28 1970-01-27 Dow Chemical Co Method for manufacture of surface modified thermoplastic fibers and filaments

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2053095B1 (enrdf_load_stackoverflow) * 1969-07-23 1974-05-03 Guindi Jacobo

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2443450A (en) * 1943-07-01 1948-06-15 Du Pont Article coated with nu-alkoxymethyl polyamide and process of making same
GB630498A (en) * 1946-06-24 1949-10-14 Wingfoot Corp Gasoline containers
US2594235A (en) * 1946-06-24 1952-04-22 Wingfoot Corp Gasoline container
GB678452A (en) * 1949-12-01 1952-09-03 British Nylon Spinners Ltd Sizing textiles with polyamide solutions
US2623496A (en) * 1949-06-02 1952-12-30 Max Pollack & Company Inc Machine for processing synthetic threads
US2639278A (en) * 1950-12-22 1953-05-19 Polymer Corp Method of preparing finely divided nylon powder
US2714097A (en) * 1951-11-27 1955-07-26 Du Pont Aqueous dispersions of n-alkoxymethylpolyhexamethylene adipamides and their application
FR1106926A (fr) * 1951-11-21 1955-12-27 Bayer Ag Procédé pour augmenter le pouvoir d'absorption de produits textiles à base de polyamides
US2731432A (en) * 1953-03-11 1956-01-17 Midland Chemical Corp Coating compositions comprising particulate polyamides dispersed in aqueous solutions of alkali metal silicates
US2746941A (en) * 1951-11-21 1956-05-22 Hans C Bick Inc Method of applying nylon finish to garments
US2917891A (en) * 1953-09-01 1959-12-22 Columbian Rope Co Synthetic rope structure and method of making same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH129528A (de) * 1927-11-18 1929-01-02 Andreas Jensen Einrichtung an umdrehenden Zapfmaschinen.
NL61278C (enrdf_load_stackoverflow) * 1943-03-08 1900-01-01
DE874896C (de) * 1944-03-22 1953-04-27 Bobingen Ag Fuer Textil Faser Verfahren zum Veredeln von Textilgut aus synthetischen linearen Polyamiden
DE938724C (de) * 1951-11-21 1956-02-09 Bayer Ag Verfahren zur Erhoehung der Saugfaehigkeit von Textilien aus Polyamiden

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2443450A (en) * 1943-07-01 1948-06-15 Du Pont Article coated with nu-alkoxymethyl polyamide and process of making same
GB630498A (en) * 1946-06-24 1949-10-14 Wingfoot Corp Gasoline containers
US2594235A (en) * 1946-06-24 1952-04-22 Wingfoot Corp Gasoline container
US2623496A (en) * 1949-06-02 1952-12-30 Max Pollack & Company Inc Machine for processing synthetic threads
GB678452A (en) * 1949-12-01 1952-09-03 British Nylon Spinners Ltd Sizing textiles with polyamide solutions
US2639278A (en) * 1950-12-22 1953-05-19 Polymer Corp Method of preparing finely divided nylon powder
FR1106926A (fr) * 1951-11-21 1955-12-27 Bayer Ag Procédé pour augmenter le pouvoir d'absorption de produits textiles à base de polyamides
US2746941A (en) * 1951-11-21 1956-05-22 Hans C Bick Inc Method of applying nylon finish to garments
US2714097A (en) * 1951-11-27 1955-07-26 Du Pont Aqueous dispersions of n-alkoxymethylpolyhexamethylene adipamides and their application
US2731432A (en) * 1953-03-11 1956-01-17 Midland Chemical Corp Coating compositions comprising particulate polyamides dispersed in aqueous solutions of alkali metal silicates
US2917891A (en) * 1953-09-01 1959-12-22 Columbian Rope Co Synthetic rope structure and method of making same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3217989A (en) * 1961-07-13 1965-11-16 Sewing Silks Ltd Synthetic polymeric sewing threads packages
US3399079A (en) * 1964-09-25 1968-08-27 American Cyanamid Co Antistatic fiber blend
US3492142A (en) * 1965-06-28 1970-01-27 Dow Chemical Co Method for manufacture of surface modified thermoplastic fibers and filaments

Also Published As

Publication number Publication date
CH339175A (de) 1959-06-30
FR1171463A (fr) 1959-01-27
DE1092877B (de) 1960-11-17
NL213472A (enrdf_load_stackoverflow)
NL106172C (enrdf_load_stackoverflow)
GB821266A (en) 1959-10-07
BE553285A (enrdf_load_stackoverflow)

Similar Documents

Publication Publication Date Title
US2306781A (en) Product containing siliceous fibers and method of making the same
US3591357A (en) Method for treating and impregnating glass fiber bundles for reinforcement of elastomeric materials
US2483406A (en) Process and apparatus for producing fibrous materials
US2780909A (en) Method of forming yarns from staple glass fibers
US2663989A (en) Coated articles and textiles and emulsions for producing them
US4321789A (en) Process for spinning of core/mantle yarns and yarn products
US4358502A (en) Glass fiber mat for reinforcing polyamides
JPS648752B2 (enrdf_load_stackoverflow)
US3019132A (en) Process for increasing the frictional resistance between threads, yarns and the like of synthetic linear polyamides and product made thereby
US3425862A (en) Method of making polymer coated inorganic filamentary materials
US2450847A (en) Apparatus for treating rubberreinforcing cord fabric
US2710275A (en) Method of bulking glass fiber strands
US6316058B1 (en) Method for making a yarn and products comprising same
US2395157A (en) Coated strand material
US2653355A (en) Method for processing mineral fibers
JPH11200160A (ja) チョップド炭素繊維およびその製造方法
US3628321A (en) Asbestos processing apparatus
US3322554A (en) Process for preparing electrically conductive flock for electrostatic flocking
US2438968A (en) Production of textile filaments, fibers, and yarns
US2946180A (en) Production of twistless staple fiber yarns by sizing untwisted bundles, false twisting and winding
US3665773A (en) Transmission means such as spindle tapes
US2704725A (en) Method of making pile-surfaced sheet material
US6884469B1 (en) Method for making yarn and products comprising same
US2304564A (en) Yarn package and method and apparatus for producing same
US3400042A (en) Non-woven synthetic leather