[go: up one dir, main page]

US3867180A - Product and process - Google Patents

Product and process Download PDF

Info

Publication number
US3867180A
US3867180A US363664A US36366473A US3867180A US 3867180 A US3867180 A US 3867180A US 363664 A US363664 A US 363664A US 36366473 A US36366473 A US 36366473A US 3867180 A US3867180 A US 3867180A
Authority
US
United States
Prior art keywords
batt
adhesive
fibers
weight
polyoxyethylene
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
US363664A
Inventor
Mary Margaret Schick
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to US363664A priority Critical patent/US3867180A/en
Application granted granted Critical
Publication of US3867180A publication Critical patent/US3867180A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • 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
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/244—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus
    • D06M13/248—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus with compounds containing sulfur
    • D06M13/256—Sulfonated compounds esters thereof, e.g. sultones
    • 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
    • D06M15/53—Polyethers
    • 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
    • D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
    • D06M15/647—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain containing polyether sequences

Definitions

  • the batts are usually subjected to an adhesive binder which infiltrates the batt and binds the fibers therein at their crossover points.
  • the batts are useful as cushioning structures for a variety of purposes, such as pillows or as an overlayer on mattress springs.
  • these bonded batts emit an auditory signal, or noise, which is objectionable to the ear, being a crackling noise.
  • This invention provides a process for reducing the noise in compressible fibrous structures when flexed under stress, which comprises:
  • an adhesive binder comprising an aqueous emulsion of at least 40% by weight of an ethylene/vinyl acetate copolymer wherein the vinyl acetate comprises 18-40% by weight of the polymer;
  • the fibers are formed by flash extrusion in. which a solution of the polymer in a solvent is maintained at super atmospheric pressure and at atemperature above the boiling point of the solvent.
  • the fibers are usually post-inflated, i.e., the inflatant is added to the cell interior to provide the inflated, pneumatic properties of the fiber.
  • This inflation procedure is also described in the aforementioned U.S. patents.
  • the fibers contain about 10 or more cells per cc of fiber and when inflated have a density of between about 0.008 and 0.05 gm./cc.
  • the inflated fiber diameters can range from about 0.025 to 0.25 inch, preferably about .03 to about 0.10 inch.
  • the anti-adhesive used herein is a surface-active agent, and is a polyoxyethylene polyoxypropylene polymethylsiloxane containing about 51% polyoxyethylene, a sodium alkylsulfonate of 22 to 24 carbon atoms, or a polyoxyethylene polyoxypropylene glycol containing about polyoxyethylene.
  • the polysiloxane can be obtained from Dow-Corning as DC 473 fluid; the glycol can be obtained from BASF- Wyandotte as Pluronic".
  • the anti-adhesive is coated onto the batt, either by dipping the batt into an aqueous mixture containing it, or by spraying it onto the unbonded batt from an aqueous dispersion to a level between about 0.03 and 5%, preferably 0.05 and 0.3%, by weight of the antiadhesive based on the batt.
  • Spray application is preferred for continuous preparation of the batts of this invention.
  • the aqueous dispersion may conveniently comprise 01-03% of the active ingredient.
  • the batt should be sprayed with water prior to application of the coatings. Wetting aids in application of the coating.
  • the anti-adhesive coating applied need not be dried, although it can be if desired, for the adhesive binder may be applied immediately thereafter.
  • the adhesive binder is conveniently applied by spraying it on the batt although dipping the batt, while supported between scrims, in a dispersion of the adhesive may be employed.
  • the binder employed is a copolymer of ethylene and vinyl acetate containing 18-40% by weight polymerized vinyl acetate (preferably 25-30%). Suitable aqueous emulsions of them can be prepared as described in U.S. Pat. No. 3,347,811.
  • the polymers have molecular weights corresponding to a melt index of less than 50, more preferably from about 1 to about 20.
  • Suitable surfactants include the sodium and potassium sulfates of straight-chain fatty alcohols containing 10-18 carbon atoms. It is usually applied from a 50% solids aqueous emulsion.
  • the coated batts will contain from about 1 to 1.5 percent anti-adhesive based on weight of fiber and about 5 to about 8 ounces of adhesive binder per square yard of batt.
  • the invention is further described in the following Example which is representative thereof and is not meant to be limiting. In the Example, parts are by weight unless otherwise noted.
  • Microcellular, closed-cell filaments are prepared substantially as described in Example IV in U.S. Pat. No. 3,381,077. In this procedure, a solution of a high molecular weight ethylene terephthalate polymer in methylene chloride is extruded to yield microcellular closed-cell filaments in which the cells are in a collapsed state.
  • the inflated filaments are heated in air to about 150C, which further inflates the cells by air, yielding microcellular, inflated closed-cell pneumatic fibers having a density of about 0.226 g/cc.
  • the resulting batt had a density of about 0.032 g./cc. and consists of about equal weights of fiber and binder.
  • Samples D, E and F the anti-adhesive described in Table I was applied to the batt by spraying it on from 0.5%, 0.1% and 0.05% solutions, respectively, in water.
  • the aqueous emulsiondescribed for Sample A was then applied and the sample subjected tothedrying and compressing described as for Sample A.
  • Table 1 shows the results when the sprayed batts A-l were tested for their noise level by the test described as follows:
  • a wooden box having the overall dimensions of a lfoot cube with the top open is used to house a micro phone (Type 15602131, No. 26845).
  • the output of the microphone is fed to a Type l560-P-40 preamplifier, and thence to a Sound-Level Meter Type 1565-A and a Graphic Level Recorder Type l52l-B.
  • a Sound- Level Calibrator Type 1562 is employed to assure. a uniform base level for all tests. (The foregoing equip ment is manufactured by General Radio Co.).
  • bonded batt DC-473 is a polyoxyethylene, polyoxypropylene polymethylsiloxane obtainable from the Dow Chemical Company.
  • Pluronic F38 is a polyoxyethylene polyoxy propylene glycol obtainable from Wyandotte Chemical Company.
  • Avitone A is a sodium alkylsulfonate obtainable from E. I. du Pont de Nemours and Company.
  • a process for reducing the noise in compressible fibrous-structures when flexed under stress which comprises:

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)
  • Nonwoven Fabrics (AREA)

Abstract

A process is disclosed for reducing the noise level created when a compressive load is placed on a bonded reticulated batt of randomly arranged pneumatic closed-cell foamed fibers so as to flex the fibers. The reduction is achieved by coating the batt, prior to coating it with an adhesive binder, with an antiadhesive which is a selected polysiloxane, a selected polyoxyethylene polyoxypropylene glycol or a selected alkyl sodium sulfonate. The anti-adhesive prevents formation of weak bonds between the fiber and the adhesive which have been found to be the source of the noise (created when the weak bonds break) but does not prevent the formation of the usual strong bonds between the fiber and the adhesive.

Description

[mite t-tes atet 1 1 Schick I [73] Assignee: E. 1. du Pont de Nemours & Co.,
Wilmington, Del.
[22] Filed: May 24, 11973 [21] Appl. No.: 363,664
[52] US. Cl. 117/76 FB, 117/76 T, 117/104 R, l17/138.8 F, 117/140 A, 161/92, 161/155,
161/156 51 1111. c1. B44d 1/08, B44d H16 [58] Field 01 Search 117/140 A, 76 FB, 76 T, 117/98, 138.8 F, 104 R; 161/92, 155, 156; 252/8.7, 8.9
[56] References Cited UNITED STATES PATENTS 2,677,700 5/1954 Jackson et a1. 252/89 X 3,381,077 4/1968 Bonner 264/321 3,402,070 9/1968 Brudmann 1 l17/l38.8 3,461,026 8/1969 Schick 161/154 3,485,711 12/1969 Fish et a1.... 161/150 3,535,181 10/1970 Yunan 156/181 14 1 Feb. 18,1975
OTHER PUBLICATIONS Schick, Nonionic Surfactants, Pub. 1967 by Marcel Dekker, Inc., New York, pages 309, 310, 312, 320, 350-352.
Primary Examiner-Leon D. Rosdol Assistant Examiner-Harris A. Pitlick [57] ABSTRACT A process is disclosed for reducing the noise level created when a compressive load is placed on a bonded reticulated batt of randomly arranged pneumatic closed-cell foamed fibers so as to flex the fibers. The reduction is achieved by coating the batt, prior to coating it with an adhesive binder, with an antiadhesive which is a selected polysiloxane, a selected polyoxyethylene polyoxypropylene glycol or a selected alkyl sodium sulfonate. The anti-adhesive prevents formation of weak bonds between the fiber and the adhesive which have been found to be the source of the noise (created when the weak bonds break) but does not prevent the formation of the usual strong bonds between the fiber and the adhesive.
5 Claims, N0 Drawings FIELD OF THE INVENTION This invention relates to the reduction of noise in fibrous cushioning structures when they are flexed under load. More specifically, this invention is directed to such noise-reduction in nonwoven batts of pneumatic foamed closed-cell fibers by coating the batts with a selected anti-adhesive prior to the application of an adhesive binder.
BACKGROUND Numerous types of foamed polymeric materials are used for cushioning applications. Among them are closed-cell microcellular foamed fibers in which the cells are inflated with an inflatant that is impermeant to the cell walls and thus is confined within the cells, making the fibers permanently pneumatically resilient. These fibers, referred to herein as microcellular, inflated closed-cell pneumatic fibers, are made of synthetic organic polymers. They can be used to prepare reticulated batts in which the fibers are randomly arranged within the batt and contact one another frequently at crossover points. To aid dimensional stability these batts are usually treated with an adhesive binder. These preparations are described in U.S. Pat. Nos. 3,461,026; 3,485,711; 3,535,181; and 3,381,077, inter alia.
As stated above, to aid the dimensional stability of the batts, the batts are usually subjected to an adhesive binder which infiltrates the batt and binds the fibers therein at their crossover points. The batts are useful as cushioning structures for a variety of purposes, such as pillows or as an overlayer on mattress springs. However, when flexed under a load, these bonded batts emit an auditory signal, or noise, which is objectionable to the ear, being a crackling noise.
It is believed that the noise is due to the breaking of weak bonds between the fibers in the batts and the adhesive binder, and it has now been discovered that, by applying a mild anti-adhesive to the batt before the adhesive binder is applied, these weak bonds can be prevented from forming. Thus, the objectionable crackling heard when the batts are stressed under load can be reduced by the use of the anti-adhesive. A process involving its use comprises the process of this invention.
SUMMARY OF THE INVENTION This invention provides a process for reducing the noise in compressible fibrous structures when flexed under stress, which comprises:
spraying a reticulated batt of randomly arranged, mi-
crocellular, inflated closed-cell, pneumatic fibers of a synthetic organic polymer with between about 0.03 to about percent by weight based on the weight of the fibers of an anti-adhesive composition comprising a polyoxyethylene polyoxypropylene polymethylsiloxane containing about 51% polyoxyethylene, a sodium alkylsulfonate of 22 to 24 carbon atoms, or a polyoxyethylene polyoxypropylene glycol containing about 80% po1yoxy ethylene;
coating said sprayed batt with an adhesive binder comprising an aqueous emulsion of at least 40% by weight of an ethylene/vinyl acetate copolymer wherein the vinyl acetate comprises 18-40% by weight of the polymer; and
2 drying the coated batt.
DESCRIPTION OF THE INVENTION The batts used in the process of this invention are re ticulated structures containing the microcellular, inflated closed-cell, pneumatic filaments laid down on top of one another to obtain numerous crossings offilament portions and penetration of portions of filaments at one thickness level into adjacent thickness levels. Individual filaments in the batt will vary in configuration from straight to curved to S shaped. An uncompressed batt may contain 3 to 4 0x./sq. yd. of the filaments. Ordinarily, the batts are obtained by laying the filaments down on a horizontal surface and building up layers until the desired thickness is obtained.
The fibers useful herein, as described above, may be prepared as disclosed in U.S. Pat. Nos. 3,375,21 1; 3,375,212; 3,503,907; 3,584,090 or 3,381,077. In general, the fibers are made from fiber-forming, organic polymers, especially polymers of ethylene terephthalate or vinyl chloride or copolymers predominantly comprising units of either of the foregoing and up to about 10% by weight of units derived from other compounds copolymerizable therewith.
In general, the fibers are formed by flash extrusion in. which a solution of the polymer in a solvent is maintained at super atmospheric pressure and at atemperature above the boiling point of the solvent. By careful adjustment of conditions, as described in said patents, the microcellular, closed-cell fibers are obtained. The fibers are usually post-inflated, i.e., the inflatant is added to the cell interior to provide the inflated, pneumatic properties of the fiber. This inflation procedure is also described in the aforementioned U.S. patents. Generally, the fibers contain about 10 or more cells per cc of fiber and when inflated have a density of between about 0.008 and 0.05 gm./cc. In addition, the inflated fiber diameters can range from about 0.025 to 0.25 inch, preferably about .03 to about 0.10 inch.
The anti-adhesive used herein is a surface-active agent, and is a polyoxyethylene polyoxypropylene polymethylsiloxane containing about 51% polyoxyethylene, a sodium alkylsulfonate of 22 to 24 carbon atoms, or a polyoxyethylene polyoxypropylene glycol containing about polyoxyethylene. The polysiloxane can be obtained from Dow-Corning as DC 473 fluid; the glycol can be obtained from BASF- Wyandotte as Pluronic".
The anti-adhesive is coated onto the batt, either by dipping the batt into an aqueous mixture containing it, or by spraying it onto the unbonded batt from an aqueous dispersion to a level between about 0.03 and 5%, preferably 0.05 and 0.3%, by weight of the antiadhesive based on the batt. Spray application is preferred for continuous preparation of the batts of this invention. The aqueous dispersion may conveniently comprise 01-03% of the active ingredient. The batt should be sprayed with water prior to application of the coatings. Wetting aids in application of the coating.
The anti-adhesive coating applied need not be dried, although it can be if desired, for the adhesive binder may be applied immediately thereafter. The adhesive binder is conveniently applied by spraying it on the batt although dipping the batt, while supported between scrims, in a dispersion of the adhesive may be employed. The binder employed is a copolymer of ethylene and vinyl acetate containing 18-40% by weight polymerized vinyl acetate (preferably 25-30%). Suitable aqueous emulsions of them can be prepared as described in U.S. Pat. No. 3,347,811. Preferably, the polymers have molecular weights corresponding to a melt index of less than 50, more preferably from about 1 to about 20. (Melt index is determined according to ASTM Dl238-modified). Usually about 15% by weight surfactant is employed to provide storagestability to the emulsion. Suitable surfactants include the sodium and potassium sulfates of straight-chain fatty alcohols containing 10-18 carbon atoms. It is usually applied from a 50% solids aqueous emulsion.
After application of the adhesive binder, the batt is dried, usually at 120-150C., under the compression required to develop the desired characteristics.
Preferably the coated batts will contain from about 1 to 1.5 percent anti-adhesive based on weight of fiber and about 5 to about 8 ounces of adhesive binder per square yard of batt. The invention is further described in the following Example which is representative thereof and is not meant to be limiting. In the Example, parts are by weight unless otherwise noted.
EXAMPLE I Microcellular, closed-cell filaments are prepared substantially as described in Example IV in U.S. Pat. No. 3,381,077. In this procedure, a solution of a high molecular weight ethylene terephthalate polymer in methylene chloride is extruded to yield microcellular closed-cell filaments in which the cells are in a collapsed state.
The filaments are cut to approximately 3-inch (7.6 cm) staple and inflated by brief contact with methylene chloride and perfluorocyclobutane and rapid drying to eliminate the methylene chloride (plasticizer) and to trap inside the cells part of the perfluorocyclobutane (to which the cell walls are impermeable in the absence of the plasticizer).
The inflated filaments are heated in air to about 150C, which further inflates the cells by air, yielding microcellular, inflated closed-cell pneumatic fibers having a density of about 0.226 g/cc.
Several batts are made of the fibers by. wetting them with water and depositing them randomly on a continuous, perforated belt to form a loose batt of about 4 inch (10.2 cm) thickness. In Sample A, no anti-adhesive is employed and the batt sample is used as a control. The
before being released from compression. The resulting batt had a density of about 0.032 g./cc. and consists of about equal weights of fiber and binder.
In Samples B and C, the anti-adhesive described in Table 1 was applied to the batt by adding it to the aqueous emulsion described for Sample A and applying as described for Sample A. The batts were compressed as described for that Sample.
1n Samples D, E and F the anti-adhesive described in Table I was applied to the batt by spraying it on from 0.5%, 0.1% and 0.05% solutions, respectively, in water. The aqueous emulsiondescribed for Sample A was then applied and the sample subjected tothedrying and compressing described as for Sample A.
' 1n Samples G, H and I, the batts were sprayed with the aqueous emulsion as described for Sample A, and then sprayed with the anti-adhesive described in Table I, as described for Sample D.
Table 1 shows the results when the sprayed batts A-l were tested for their noise level by the test described as follows:
A wooden box having the overall dimensions of a lfoot cube with the top open is used to house a micro phone (Type 15602131, No. 26845). The output of the microphone is fed to a Type l560-P-40 preamplifier, and thence to a Sound-Level Meter Type 1565-A and a Graphic Level Recorder Type l52l-B. A Sound- Level Calibrator Type 1562 is employed to assure. a uniform base level for all tests. (The foregoing equip ment is manufactured by General Radio Co.).
sured and the test reading is corrected for this back- I ground in the tabulation of results.
TABLE I Sample Anti- Wt. On How Added Noise Batt Adhesive Fiber To Sample Batt (db) A None 33 or more B DC-473 (1%) Added to Adhesive 22 Emulsion C A\'itone" A (5%) Added to Adhesive 2'1 Emulsion D D0473 (0.08%) Sprayed on batt 24 before adding binder E DC-473 (0.40%) Sprayed on batt 16 before adding binder F "Pluronic- (0.80%) Sprayed on batt 18 before adding binder G D0473 (0.571) Sprayed on already 30.7
bonded batt H DC-473 (l7r) Sprayed on already 31.4
bonded batt I DC-473 (2'7!) Sprayed on already 32.0
bonded batt DC-473 is a polyoxyethylene, polyoxypropylene polymethylsiloxane obtainable from the Dow Chemical Company. Pluronic F38 is a polyoxyethylene polyoxy propylene glycol obtainable from Wyandotte Chemical Company. Avitone A is a sodium alkylsulfonate obtainable from E. I. du Pont de Nemours and Company.
Subjective evaluation indicates that the noise of flexing becomes objectionable above the level of about 27 decibels. Thus, as evidenced by the data in Table I, spraying the anti-adhesive onto an already bonded batt does not provide adequate reduction of noise level.
The preceding representative examples may be varied within the scope of the present total specification disclosure, as understood and practiced by one skilled in the art, to achieve essentially the same results.
The foregoing detailed description has been given for clearness of understanding only and no unnecessary limitations are to be understood therefrom. The invention is not limited to the exact details shown and described for obvious modifications will occur to those skilled in the art.
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A process for reducing the noise in compressible fibrous-structures when flexed under stress, which comprises:
spraying a reticulated batt of randomly arranged, mi-
6 crocellular, inflated closed-cell, pneumatic fibers of a synthetic organic polymer with between about 0.03 to about 5 percent by weight based on the weight of the fibers of an anti-adhesive comprising an aqueous dispersion of a compound selected from the group consisting of a polyoxyethylene polyoxypropylene polymethylsiloxane containing about 51% polyoxyethylene, a sodium alkylsulfonate of 22 to 24 carbon atoms and a polyoxyethylene polyoxypropylene glycol containing about polyoxyethylene; coating said sprayed batt with an adhesive binder comprising an aqueous emulsion of at least 40% by weight of an ethylene/vinyl acetate copolymer wherein the vinyl acetate comprises 18-40% by weight of the polymer; and drying the coated batt. 2. The process of claim 1 wherein the synthetic organic polymer is polyethylene terephthalate.
3. The process of claim 1 wherein the anti-adhesive is the polymethylsiloxane described therein.
4. The process of claim 3 wherein the amount of the I polymethylsiloxane coated onto the batt is between about 1 and about 5 percent by weight, based on the weight of the fibers.
5. The process of claim 4 wherein the synthetic organic polymer is polyethylene terephthalate.

Claims (5)

1. A PROCESS FOR REDUCING THE NOISE IN COMPRESSIBLE FIBROUS STRUCTURE WHEN FLEXED UNDER STRESS, WHICH COMPRISES: SPRAYING A RETICULATED BATT OF RANDOMLY ARRANGED, MICROCELLULAR, INFLATED COLSED-CELL, PNEUMATIC FIBERS OF A SYNTHETIC ORGANIC POLYMER WITH BETWEEN ABOUT 0.03 TO ABOUT 5 PERCENT BY WEIGHT BASED ON THE WEIGHT OF THE FIBERS OF AN ANTI-ADHESIVE COMPRISING AN AQUEOUS DISPERSION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A POLYOXYETHYLENE POLYOXYPROPYLENE POLYMETHYLSILOXANE CONTAINING ABOUT 51% POLYEXYETHYLENE A SODIUM ALKYLSULFONATE OF 22 TO 24 CARBON ATOMS AND POLYOXYETHYLENE POLOXYPROPYLENE GLYCOL CONTAINING ABOUT 80% POLYOXYETHYLENE; COATING SAID SPRAYED BATT WITH AN ADHESIVE BINDER COMPRISING AN AQUEOUS EMULSION OF AT LEAST 40% BY WEIGHT OF AN ETHYLENE/VINYL ACETATE COPOLYMER WHEREIN THE VINYL ACETATE COMPRISES 18-40% BY WEIGHT OF THE POLYMER; AND DRYING THE COATED BATT.
2. The process of claim 1 wherein the synthetic organic polymer is polyethylene terephthalate.
3. The process of claim 1 wherein the anti-adhesive is the polymethylsiloxane described therein.
4. The process of claim 3 wherein the amount of the polymethylsiloxane coated onto the batt is between about 1 and about 5 percent by weight, based on the weight of the fibers.
5. The process of claim 4 wherein the synthetic organic polymer is polyethylene terephthalate.
US363664A 1973-05-24 1973-05-24 Product and process Expired - Lifetime US3867180A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US363664A US3867180A (en) 1973-05-24 1973-05-24 Product and process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US363664A US3867180A (en) 1973-05-24 1973-05-24 Product and process

Publications (1)

Publication Number Publication Date
US3867180A true US3867180A (en) 1975-02-18

Family

ID=23431158

Family Applications (1)

Application Number Title Priority Date Filing Date
US363664A Expired - Lifetime US3867180A (en) 1973-05-24 1973-05-24 Product and process

Country Status (1)

Country Link
US (1) US3867180A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2733993A1 (en) * 1995-05-13 1996-11-15 Goldschmidt Ag Th LUBRICANT FOR COATING EXPANDED MOLDED ARTICLES IN POLYURETHANE FOAM
US20020068495A1 (en) * 2000-10-06 2002-06-06 Aneja Arun Pal Three dimensional ultramicrocellular fiber batt

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2677700A (en) * 1951-05-31 1954-05-04 Wyandotte Chemicals Corp Polyoxyalkylene surface active agents
US3381077A (en) * 1966-01-26 1968-04-30 Du Pont Method for inflating closed cell foams
US3402070A (en) * 1964-12-10 1968-09-17 Du Pont Binder-lubricant for fiber batts
US3461026A (en) * 1966-06-23 1969-08-12 Du Pont Laminated fibrous batt
US3485711A (en) * 1966-06-23 1969-12-23 Du Pont Low-density web-like cushioning structure of cellular filamentary material
US3535181A (en) * 1966-12-28 1970-10-20 Du Pont Process for making consolidated batts of microcellular filamentary material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2677700A (en) * 1951-05-31 1954-05-04 Wyandotte Chemicals Corp Polyoxyalkylene surface active agents
US3402070A (en) * 1964-12-10 1968-09-17 Du Pont Binder-lubricant for fiber batts
US3381077A (en) * 1966-01-26 1968-04-30 Du Pont Method for inflating closed cell foams
US3461026A (en) * 1966-06-23 1969-08-12 Du Pont Laminated fibrous batt
US3485711A (en) * 1966-06-23 1969-12-23 Du Pont Low-density web-like cushioning structure of cellular filamentary material
US3535181A (en) * 1966-12-28 1970-10-20 Du Pont Process for making consolidated batts of microcellular filamentary material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2733993A1 (en) * 1995-05-13 1996-11-15 Goldschmidt Ag Th LUBRICANT FOR COATING EXPANDED MOLDED ARTICLES IN POLYURETHANE FOAM
US20020068495A1 (en) * 2000-10-06 2002-06-06 Aneja Arun Pal Three dimensional ultramicrocellular fiber batt
WO2002029144A3 (en) * 2000-10-06 2002-09-12 Du Pont Three dimensional ultramicrocellular fiber batt

Similar Documents

Publication Publication Date Title
GB1145932A (en) Cushioning structure
US3980511A (en) Manufacture of products having high acoustic insulating characteristics
US3713868A (en) Acrylic-nitrile foam-backed fabric and method of preparation
DE69902283T2 (en) PERFORATED FOAM
US3419506A (en) Pressurized composition for applying foamed dressings
US6541105B1 (en) Acoustical open-cell polylefins and process for making
DE69930278T2 (en) ACOUSTIC OPEN CELL POLYOLEFINES AND MANUFACTURING METHOD
US9056961B2 (en) Melamine-resin foams comprising hollow microbeads
Sari et al. Physical and acoustical properties of corn husk fiber panels
TW201638198A (en) Phenolic resin foam and method of producing the same
US3867180A (en) Product and process
Imai et al. Studies of acoustical absorption of flexible polyurethane foam
US4110510A (en) Sound barrier material
EP0079501B1 (en) Open-cell shaped articles made of polyvinyl acetals
DE2002754A1 (en) Heat-curable, polyurethane-forming foams
Constantin et al. Acoustic properties of a new composite material obtained from feather flour and recycled polypropylene
CA1092299A (en) Fiber-containing polyurethane foams and process for their manufacture
KR102220943B1 (en) Thermosetting foam, method of producing the same, and insulating material
KR102568630B1 (en) Biodegradable shock absorbing pad
JPH11133980A (en) Sound absorbing material and manufacture thereof
RU2671721C1 (en) Sound-absorbing elastomeric foam material
JPH049898A (en) Sound insulator
EP1604075A1 (en) Noise-absorbable and adiabatic panel
KR102231779B1 (en) Thermosetting foam and method of producing the same
CN119036705B (en) A mold cleaning sponge for semiconductor packaging mold and a mold cleaning composition and use method thereof