US3754734A - Coloration of hot melt polymers - Google Patents

Coloration of hot melt polymers Download PDF

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US3754734A
US3754734A US3754734DA US3754734A US 3754734 A US3754734 A US 3754734A US 3754734D A US3754734D A US 3754734DA US 3754734 A US3754734 A US 3754734A
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dye
pump
injection
hot melt
polymer
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J Hoyle
T Griffin
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Slack and Parr Ltd
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Slack and Parr Ltd
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D1/00—Treatment of filament-forming or like material
    • D01D1/06—Feeding liquid to the spinning head
    • D01D1/065—Addition and mixing of substances to the spinning solution or to the melt; Homogenising
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/29—Feeding the extrusion material to the extruder in liquid form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
    • 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
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85978—With pump
    • Y10T137/86131—Plural
    • Y10T137/86139—Serial
    • 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
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87571—Multiple inlet with single outlet
    • Y10T137/87652—With means to promote mixing or combining of plural fluids

Definitions

  • ABSTRACT The invention concerns the coloration of hot melt polymers by direct injection of a dye into the polymer stream during polymerization, e.g., before feed to a spinning machine.
  • a feed pump raises the dye pressure to approximate to that of the polymer at the injection point and a gear or turbine pump provides and controls continuous flow injection of the dye from the feed pump into the polymer stream.
  • apparatus for the coloration of a hot melt polymer by direct injection of the dye, in solution or suspension, into a continuous polymer stream temperature-controlled for progressive polymerization, as in a continuous polymerization coil comprises a feed pump for raising the dye pressure to approximate to that of the polymer at the injection point, and a gear or turbine pump for continuous-flow injection of the dye from the feed pump into the polymer stream and for measurement and control of the rate of injection.
  • the apparatus preferably includes a dye-mixing tank with continuously operating agitating or stirring means therein and providing the input to the feed pump.
  • the dye pressure may then be-determined and controlled by means of a relief valve in a feed-back path from the output side of the feed'pump.
  • a three-gear pump in a temperature-controlled zone is used for dye injection, and polymer is bled up stream of the injection point for preliminary mixing with the dye in the three-gear pump.
  • the invention provides for dye injection into a continuous polymerization coil or the like in a continuous flow free of pulsations such as are-associated with piston or diaphragm pumps, and therefore making for uniform coloration.
  • the gear-type pump providing the continuous-flow injection being operated in a pressure-balanced condition, also ensures accurate metering, making for good control of color and of the facility of repeating a color.
  • FIG. 1 illustrates the first of the forms of apparatus
  • FIG. 2 illustratesthesecond formof apparatus.
  • polymer salt flows through a continuous polymerization coil 1 in a temperature-controlled zone and is delivered into a manifold 2 supplying the individual metering pumps which feed the spinnerets ofa spinning machine.
  • Colorization is achieved, with or without a measure of premixing, bydirect injection of a dye solution or suspension into the polymer stream in the polymerization coil. Dispersement or final dispersement of the dye in the polymer salt results from the violent boiling action of the salt in the coil.
  • the dye in a water orglycol solution or suspension is stored in a mixing tank 3 fitted with a rotary-paddle type agitator 4 and with an outlet 5 connected to a feed and recirculating pump 6, the excess pump capacity being recirculated back to the dye mixing tank through a line 7 and a relief valve 8 which controls the delivery pressure.
  • This recirculation assists in agitation of the dye solution or dispersion.
  • the dye passes from the feed-pump 6, at a pressure determined and controlled by the relief valve 8, to a two-gear injection pump 9, the outlet 10 of which leads directly to a tapping point 11 in the continuous polymerization coil 1 for dispersement of the dye as already described.
  • the feed-pump pressure is adjusted to match the polymer pressure at the tapping point I] so that the two-gear injection pump 9 operates in a pressure balanced condition. This ensures accurate metering and permits effective control of the rate of injection.
  • a three-gear injection pump 12 in a temperature-controlled zone 13 is employed in place of the two-gear pump 9 and partially polymerized salt from the continuous polymerization coil 1 is bled from a point 14 upstream of the injection point 11 into the three-gear pump 12 for pre-mixing.
  • the pump 12 has a pair of inlet ports 15 and 16 and a single outlet port.
  • the three gears of the pump are arranged (as shown) for rotation about aligned parallel axes. Rotation of the gears effects mixing of the liquid flows entering through the inlet ports 15 and 16 and delivery thereof under pressure through the outlet port.
  • a dye feed-pump of controlled delivery pressure is employed as before. It is coupled to one inlet port 15 of the three-gear injection pump 12.
  • the polymer salt bled from the coil 1 is fed to the other inlet port 16 so that a measure of premixing of the dye and the polymer salt takes place in the three-gear pump 12, which is maintained at a temperature above the melt temperature of the polymer being used.
  • the threegear pump 12 injects the mixture into the continuous polymerization coil 1 at injection point 11 so that final mixing is achieved by the boiling action within the coil.
  • the three-gear injection'pump 12 is operated in a balanced pressure condition by adjusting the dye feed pressure to match the polymer pressure at the point of injection, and arranging the bleed tapping close to the injection point. (but sufficiently removed to minimize recirculation of the injected dye), sothat the pressure difference between the point of bleed and the point of injection is small. 1
  • Premixing of the dye and polymer assists-in complete final dispersion of the dye. has a further advantage in that wear of the pump gearsis reduced when an abrasive dye additive is used as compared with handling only the dye in the injection pump.
  • Means for feeding colored hot melt polymer to the spinnerets of a spinning machine comprising a polymerization coil through which the hot melt polymer is delivered to the spinnerets, said coil having an injection 'point; a rotary pump; a line connecting the rotary pump to the injection point; a dye mixing tank; and a feed pump for delivering concentrated dye under a predetermined controllable pressure directly from the tank to the rotary pump for continuous flow injection of the concentrated dye into the hot melt polymer passing through the coil.
  • Means for feeding colored hot melt polymer to the spinnerets of a spinning machine comprising a polymerization coil through which the hot melt polymer is delivered to the spinnerets, said coil having an injection point and a bleed point disposed upstream of the injection point; a rotary pump having amixing facility, said rotary pump having a pair of inlets and an outlet; a supply line connecting the bleed point and one of the inlets of the rotary pump; a'delivery line connecting the outlet of the rotary pump and 3 4 the injection point; a dye-mixing tank;and a feed pump fed to the rotary pump along the supply line to obtain for delivering concentrated dye under a predetermined continuous flow injection of colored polymer along the controllable pressure from the tank to the other inlet of delivery line into the polymerization coil.
  • the rotary pump for admixture with hot melt polymer

Abstract

The invention concerns the coloration of hot melt polymers by direct injection of a dye into the polymer stream during polymerization, e.g., before feed to a spinning machine. A feed pump raises the dye pressure to approximate to that of the polymer at the injection point and a gear or turbine pump provides and controls continuous flow injection of the dye from the feed pump into the polymer stream. A three gear pump in a temperature-controlled zone is preferably used for dye injection and the polymer is bled upstream of the injection point for premixing with the dye in the three gear pump.

Description

United States Patent [1 1 Hoyle et al.
[ COLORATION OF HOT MELT POLYMERS [75] inventors: John Hoyle; Thomas Reuben Griffin,
both of Kegworth, near Derby,
[21] Appl. No.: 160,812
[52] US. Cl 259/4, 137/566, 137/567,
[451 Aug. 28, 1973 3,326,815 6/1967 Werner et a1 259/8 X Primary Examiner-William 1. Price Assistant Examiner-Phi1ip R. Coe Attorney-Young & Thompson [57] ABSTRACT The invention concerns the coloration of hot melt polymers by direct injection of a dye into the polymer stream during polymerization, e.g., before feed to a spinning machine.
A feed pump raises the dye pressure to approximate to that of the polymer at the injection point and a gear or turbine pump provides and controls continuous flow injection of the dye from the feed pump into the polymer stream.
A three gear pump in a temperature-controlled zone is preferably used for dye injection and the polymer is bled upstream of the injection point for premixing with the dye in the three gear pump.
2 Claims, 2 Drawing Figures 137/604, 259/6, 425/3822 [51] lnt.Cl. ..B01f 5/14,B0lf 13/10 [58] Field of Search 137/566, 567, 604; 259/7, 8, 21, 22, 23, 24, 18, 4, 60; 418/196; 425/382.2
[56] References Cited UNITED STATES PATENTS 3,023,764 3/1962 Dooley et a1. 137/566 X 3,272,141 9/1966 Curry et a] 418/196 X 2,915,299 12/1959 Woebcke 259/8 Patented Aug. 28, 1973 3,154,134
COLORATION OF HOT MELT POLYMERS This invention relates to the coloration of hot melt polymers andhas for its object to provide improved apparatus for the direct injection of a dye into a polymer stream during polymerization. It is of particular advantage in the coloration of hot melt polymer immediately prior to the latter being fed to a spinning machine.
According to the invention, apparatus for the coloration of a hot melt polymer by direct injection of the dye, in solution or suspension, into a continuous polymer stream temperature-controlled for progressive polymerization, as in a continuous polymerization coil, comprises a feed pump for raising the dye pressure to approximate to that of the polymer at the injection point, and a gear or turbine pump for continuous-flow injection of the dye from the feed pump into the polymer stream and for measurement and control of the rate of injection.
The apparatus preferably includes a dye-mixing tank with continuously operating agitating or stirring means therein and providing the input to the feed pump. The dye pressure may then be-determined and controlled by means of a relief valve in a feed-back path from the output side of the feed'pump.
In a preferred arrangement according to the invention, a three-gear pump in a temperature-controlled zone is used for dye injection, and polymer is bled up stream of the injection point for preliminary mixing with the dye in the three-gear pump.
The invention provides for dye injection into a continuous polymerization coil or the like in a continuous flow free of pulsations such as are-associated with piston or diaphragm pumps, and therefore making for uniform coloration. The gear-type pump providing the continuous-flow injection, being operated in a pressure-balanced condition, also ensures accurate metering, making for good control of color and of the facility of repeating a color.
Two forms of apparatus for the coloration of hot melt polymers, representing embodiments of the invention, will now be described by way of example, and with reference to the .accompanying drawings, in which:
FIG. 1 illustrates the first of the forms of apparatus,
and a I v FIG. 2 illustratesthesecond formof apparatus.
In each case polymer salt flows through a continuous polymerization coil 1 in a temperature-controlled zone and is delivered into a manifold 2 supplying the individual metering pumps which feed the spinnerets ofa spinning machine. Colorization is achieved, with or without a measure of premixing, bydirect injection of a dye solution or suspension into the polymer stream in the polymerization coil. Dispersement or final dispersement of the dye in the polymer salt results from the violent boiling action of the salt in the coil.
In one embodiment the dye in a water orglycol solution or suspension is stored in a mixing tank 3 fitted with a rotary-paddle type agitator 4 and with an outlet 5 connected to a feed and recirculating pump 6, the excess pump capacity being recirculated back to the dye mixing tank through a line 7 and a relief valve 8 which controls the delivery pressure. This recirculation assists in agitation of the dye solution or dispersion. The dye passes from the feed-pump 6, at a pressure determined and controlled by the relief valve 8, to a two-gear injection pump 9, the outlet 10 of which leads directly to a tapping point 11 in the continuous polymerization coil 1 for dispersement of the dye as already described.
In operation, the feed-pump pressure is adjusted to match the polymer pressure at the tapping point I] so that the two-gear injection pump 9 operates in a pressure balanced condition. This ensures accurate metering and permits effective control of the rate of injection.
In an alternative arrangement, a three-gear injection pump 12 in a temperature-controlled zone 13 is employed in place of the two-gear pump 9 and partially polymerized salt from the continuous polymerization coil 1 is bled from a point 14 upstream of the injection point 11 into the three-gear pump 12 for pre-mixing. The pump 12 has a pair of inlet ports 15 and 16 and a single outlet port. The three gears of the pump are arranged (as shown) for rotation about aligned parallel axes. Rotation of the gears effects mixing of the liquid flows entering through the inlet ports 15 and 16 and delivery thereof under pressure through the outlet port.
In this arrangement, a dye feed-pump of controlled delivery pressure is employed as before. It is coupled to one inlet port 15 of the three-gear injection pump 12. The polymer salt bled from the coil 1 is fed to the other inlet port 16 so that a measure of premixing of the dye and the polymer salt takes place in the three-gear pump 12, which is maintained at a temperature above the melt temperature of the polymer being used. The threegear pump 12 injects the mixture into the continuous polymerization coil 1 at injection point 11 so that final mixing is achieved by the boiling action within the coil.
In order to ensure accurate metering, the three-gear injection'pump 12 is operated in a balanced pressure condition by adjusting the dye feed pressure to match the polymer pressure at the point of injection, and arranging the bleed tapping close to the injection point. (but sufficiently removed to minimize recirculation of the injected dye), sothat the pressure difference between the point of bleed and the point of injection is small. 1
Premixing of the dye and polymer assists-in complete final dispersion of the dye. has a further advantage in that wear of the pump gearsis reduced when an abrasive dye additive is used as compared with handling only the dye in the injection pump.
. We claim:
1. Means for feeding colored hot melt polymer to the spinnerets of a spinning machine, said feeding means comprising a polymerization coil through which the hot melt polymer is delivered to the spinnerets, said coil having an injection 'point; a rotary pump; a line connecting the rotary pump to the injection point; a dye mixing tank; and a feed pump for delivering concentrated dye under a predetermined controllable pressure directly from the tank to the rotary pump for continuous flow injection of the concentrated dye into the hot melt polymer passing through the coil.
2. Means for feeding colored hot melt polymer to the spinnerets of a spinning machine, said feeding means comprising a polymerization coil through which the hot melt polymer is delivered to the spinnerets, said coil having an injection point and a bleed point disposed upstream of the injection point; a rotary pump having amixing facility, said rotary pump having a pair of inlets and an outlet; a supply line connecting the bleed point and one of the inlets of the rotary pump; a'delivery line connecting the outlet of the rotary pump and 3 4 the injection point; a dye-mixing tank;and a feed pump fed to the rotary pump along the supply line to obtain for delivering concentrated dye under a predetermined continuous flow injection of colored polymer along the controllable pressure from the tank to the other inlet of delivery line into the polymerization coil. the rotary pump for admixture with hot melt polymer

Claims (2)

1. Means for feeding colored hot melt polymer to the spinnerets of a spinning machine, said feeding means comprising a polymerization coil through which the hot melt polymer is delivered to the spinnerets, said coil having an injection point; a rotary pump; a line connecting the rotary pump to the injection point; a dye mixing tank; and a feed pump for delivering concentrated dye under a predetermined controllable pressure directly from the tank to the rotary pump for continuous flow injection of the concentrated dye into the hot melt polymer passing through the coil.
2. Means for feeding colored hot melt polymer to the spinnerets of a spinning machine, said feeding means comprising a polymerization coil through which the hot melt polymer is delivered to the spinnerets, said coil having an injection point and a bleed point disposed upstream of the injection point; a rotary pump having a mixing facility, said rotary pump having a pair of inlets and an outlet; a supply line connecting the bleed point and oNe of the inlets of the rotary pump; a delivery line connecting the outlet of the rotary pump and the injection point; a dye-mixing tank; and a feed pump for delivering concentrated dye under a predetermined controllable pressure from the tank to the other inlet of the rotary pump for admixture with hot melt polymer fed to the rotary pump along the supply line to obtain continuous flow injection of colored polymer along the delivery line into the polymerization coil.
US3754734D 1971-07-08 1971-07-08 Coloration of hot melt polymers Expired - Lifetime US3754734A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5537363A (en) * 1992-07-10 1996-07-16 Novatech, Inc. Apparatus for generating a relatively stable aqueous suspension of colloidal silica
US20010015226A1 (en) * 2000-02-21 2001-08-23 Kei Hamamoto Tank and a method for storing an easily polymerizable compound
US20010018931A1 (en) * 2000-02-21 2001-09-06 Yuichi Ijiri Storage tank for viscous oil containing easily polymerizable compounds
US6607648B1 (en) * 1998-11-10 2003-08-19 Integrity Technologies Llc Method and apparatus for generating aqueous silica network particles
US20040049301A1 (en) * 2002-09-10 2004-03-11 M Fsi Ltd. Apparatus and method for preparing and supplying slurry for CMP machine
US20050128869A1 (en) * 2002-07-24 2005-06-16 Saurer Gmbh & Co. Kg Apparatus and method for injecting a liquid dye into a polymer melt
US20060054659A1 (en) * 2004-09-16 2006-03-16 Radford Philip T Method and apparatus for blending a colorant
WO2011038990A1 (en) * 2009-09-29 2011-04-07 Evonik Röhm Gmbh Method and system for coloring plastic molding materials

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2915299A (en) * 1956-12-19 1959-12-01 Mobay Chemical Corp Apparatus for controlling temperatures
US3023764A (en) * 1958-04-16 1962-03-06 American Viscose Corp Liquid blending system
US3272141A (en) * 1964-05-13 1966-09-13 Monsanto Co Metering pump
US3326815A (en) * 1963-10-02 1967-06-20 Knapsack Ag Process for the manufacture of aqueous clay suspensions

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2915299A (en) * 1956-12-19 1959-12-01 Mobay Chemical Corp Apparatus for controlling temperatures
US3023764A (en) * 1958-04-16 1962-03-06 American Viscose Corp Liquid blending system
US3326815A (en) * 1963-10-02 1967-06-20 Knapsack Ag Process for the manufacture of aqueous clay suspensions
US3272141A (en) * 1964-05-13 1966-09-13 Monsanto Co Metering pump

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5537363A (en) * 1992-07-10 1996-07-16 Novatech, Inc. Apparatus for generating a relatively stable aqueous suspension of colloidal silica
US6607648B1 (en) * 1998-11-10 2003-08-19 Integrity Technologies Llc Method and apparatus for generating aqueous silica network particles
US20040213858A1 (en) * 1998-11-10 2004-10-28 Franceschetti Donald R. Method of generating aqueous silica network particles and compositions including the silica network particles
US20010015226A1 (en) * 2000-02-21 2001-08-23 Kei Hamamoto Tank and a method for storing an easily polymerizable compound
US20010018931A1 (en) * 2000-02-21 2001-09-06 Yuichi Ijiri Storage tank for viscous oil containing easily polymerizable compounds
US6581637B2 (en) * 2000-02-21 2003-06-24 Nippon Shokubai Co., Ltd. Tank and a method for storing an easily polymerizable compound
US6588450B2 (en) * 2000-02-21 2003-07-08 Nippon Shokubai Co., Ltd. Storage tank for viscous oil containing easily polymerizable compounds
US7278776B2 (en) * 2002-07-24 2007-10-09 Saurer Gmbh & Co. Kg Apparatus and method for injecting a liquid dye into a polymer melt
US20050128869A1 (en) * 2002-07-24 2005-06-16 Saurer Gmbh & Co. Kg Apparatus and method for injecting a liquid dye into a polymer melt
US20040049301A1 (en) * 2002-09-10 2004-03-11 M Fsi Ltd. Apparatus and method for preparing and supplying slurry for CMP machine
US20060054659A1 (en) * 2004-09-16 2006-03-16 Radford Philip T Method and apparatus for blending a colorant
WO2011038990A1 (en) * 2009-09-29 2011-04-07 Evonik Röhm Gmbh Method and system for coloring plastic molding materials
JP2013505863A (en) * 2009-09-29 2013-02-21 エボニック レーム ゲゼルシャフト ミット ベシュレンクテル ハフツング Method and apparatus for coloring plastic molding materials
US9427889B2 (en) 2009-09-29 2016-08-30 Evonik Roehm Gmbh Process and system for colouring plastics moulding compositions

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