WO1991000176A1 - Panneau en laine de roche de faible masse volumique et procede - Google Patents

Panneau en laine de roche de faible masse volumique et procede Download PDF

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Publication number
WO1991000176A1
WO1991000176A1 PCT/US1990/003327 US9003327W WO9100176A1 WO 1991000176 A1 WO1991000176 A1 WO 1991000176A1 US 9003327 W US9003327 W US 9003327W WO 9100176 A1 WO9100176 A1 WO 9100176A1
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WIPO (PCT)
Prior art keywords
starch
panel
surfactant
mass
mineral wool
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Ceased
Application number
PCT/US1990/003327
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English (en)
Inventor
David G. Izard
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USG Interiors LLC
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USG Interiors LLC
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Filing date
Publication date
Application filed by USG Interiors LLC filed Critical USG Interiors LLC
Publication of WO1991000176A1 publication Critical patent/WO1991000176A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B19/00—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica
    • B32B19/06—Layered products comprising a layer of natural mineral fibres or particles, e.g. asbestos, mica next to a fibrous or filamentary layer
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/005—Halogen-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/38—Polysaccharides or derivatives thereof
    • C04B24/383—Cellulose or derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B30/00—Compositions for artificial stone, not containing binders
    • C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
    • 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
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D04H1/4218—Glass fibres
    • 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
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/587—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
    • 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
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/72—Density
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure

Definitions

  • This invention relates to fibrous mineral wool products. More 5 particularly, it relates to a method for manufacturing strong, structural panels of mineral fiber that are very lightweight, about 3-10 pounds per cubic foot density, and which may be used as acoustical ceiling tiles, thermal insulating panels, sound absorbing panels, pipe and beam insulation and similar products.
  • the water felting of dilute aqueous dispersions of mineral wool and lightweight aggregate is known.
  • a dilute dispersion is flowed onto a moving foraminous support wire screen for dewatering first by gravity and then by vacuum suction means to form a mat.
  • the wet mat still
  • Patent 4,447,560 suggests a low density sheet by forming a first slurry of fiber than contains synthetic rubber latex solids. A detergent slurry is then formed, and the two slurries admixed to about 15% solids consistency, agitated to a stable foam, and oven dried. The extremely time consuming and energy intensive drying of the stable foam from 15% solids is a severe economic detriment.
  • U.S. Patent No. 3,228,825 teaches a felted glass fiber product which is highly porous and has exceptional flexibility and flexural strength.
  • U.S. Patent 4,062,721 teaches the avoidance of foam in the forming box so that the gravity drainage of water is not slowed but the development of a foam thereafter in the sheet in order to increase the pressure differential across the sheet during vacuum dewatering.
  • An object of the present invention is to provide low density yet strong mineral panels such that panels having densities between about 3-10 pounds per cubic foot will have a modulus of rupture of at least about 60 pounds per cubic inch.
  • the present invention comprises the addition of a delicately foaming binder and a slightly cationic guar gum along with an essentially non-foaming nonionic surfactant to an aqueous suspension of mineral fibers and lightweight aggregate and thereafter depositing upon the forming wire such an open, porous, and entangled fibrous mass as to allow flow-through air stripping of water and drying to result in a very strong, low density mineral wool panel.
  • drainage time is reduced rather than increased as suggested by the prior art and very low density panels capable of supporting their own weight without visible sagging, bending or collapsing when supported only at the edges of the panels, as in a suspended ceiling grid, are made.
  • a nonionic surfactant such as a polyethyleneoxy ether of ethyl alcohol
  • a cationic guar gum or guar bean meal derivative such as a trimethylammoniopropyl guar chloride polymer
  • FIG. 1 is a schematic diagram of a mineral board manufacturing process in accordance with the present invention.
  • FIGS. 2 and 3 are graphs of the viscosity/temperature relationship of 6% by weight solutions of GENVIS 600 wheat starch and Staley pearl corn starch, respectively.
  • the mixing tank 10 of FIG. 1 is equipped with the motor driven impeller 12 which mixes an aqueous slurry containing from about 3% to about 6% solids by weight.
  • the composition of the solids in the slurry should be between the following limits:
  • Nonionic Surfactant about 0.5-3.5% Clay up to about 7%
  • the slurry may contain from about 0.75% to about 5.7% mineral wool, up to about 2.4% lightweight aggregate, from about 0.3% to about 1.8% starch, from about 0.0009% to about 0.21% of the cationic guar derivative, from about 0.015% to about 0.21% of the non-ionic surfactant, and up to about 0.42% of the clay.
  • the starch used as the binder in this invention is cooked to a temperature approaching but not reaching its gel point in order to attain the necessary adhesiveness yet avoid the consequences of a swollen binder that would bridge over voids and passages in the fibrous mass and impede drainage.
  • the gel point the temperature at which gelatinization of the starch commences, may be determined by plotting the viscosity/temperature curve and observing the inflection point. It is recognized that the apparent gel point changes as the starch concentration changes but the gel point of a dilute solution is an approximation of the true gel point as shown by Sandstedt, R.M. and Abbott, R.C. in CEREAL SCIENCE TODAY, Vol. 9, No. 1, 1964.
  • the gel point of a 6% by weight solution of GENVIS 600 wheat starch is shown at A in FIG. 2 herein which is an amylogram drawn by a VTSCO/amylo/GRAPH instrument when the viscosity of the starch solution is measured as the temperature of the solution is raised 1.5°C per minute and the general operating procedure outlined in Bulletin G 66 of C.W. Brabender Instruments, Inc. is followed.
  • the gel point of a 6% solution of Staley pearl corn starch is shown at B in FIG. 3, which is an amylogram drawn in like manner.
  • the preferred binder is the wheat starch, which contains about 6% of a protein fraction. It is dispersed at a high shear rate in a portion of the process water and then heated to a temperature between 135° and 190°F to cook the starch. There is no substantial increased viscosity apparent with this starch during the cooking cycle even at the high end of the range.
  • the starch binder is fed to mixing tank 10. It is suitable to stop the cooking of this and other starches at a temperature about 1°F lower than the gel point to ensure that swelling of the starch grains is minimal. It is preferred to cook the wheat starch and the pearl corn starch at a temperature of from about 168 to about 172°F.
  • a nonionic surfactant is added early to the slurry in mixing tank 10. It is preferred to use an about 2% solution of a low foaming water soluble surfactant such as IGEPAL DM-710 dinonylphenoxy poly(ethyleneoxy) ethanol having a molecular weight of about 995 (sold by GAF Chemicals). Similar ethers of ethyl alcohol are commercially available and may be used. Other low foaming surfactants having an HLB (hydrophilic-lipophilic balance) of about 13 are contemplated also.
  • a low foaming water soluble surfactant such as IGEPAL DM-710 dinonylphenoxy poly(ethyleneoxy) ethanol having a molecular weight of about 995 (sold by GAF Chemicals). Similar ethers of ethyl alcohol are commercially available and may be used.
  • HLB hydrophilic-lipophilic balance
  • the cationic guar bean meal derivative such as guar 2-hydroxy-3 (trimethylamino)-propyl ether chloride, a commercially available powdered polymer (GENDRIV 158 from Henkel Corporation), is added to the main mixing tank 10 where it readily disperses in the mix water to form a solution of appropriate concentration exhibiting flocculating and solids retention capability.
  • the guar derivative tends to flocculate the mineral wool and aggregate and the effect is enhanced by the addition of small amounts of clay. Because it hydrates rapidly, the cationic guar derivative is added to mixing tank 10 last after thorough homogeneous mixing of all the other ingredients, and mixing is continued for a few seconds before transferring the slurry from mix tank 10 by pump 20 to flow box 30.
  • the function of the flow box 30 is to spread a uniform layer of slurry across the width of a moving wire belt 40, commonly called the wire, to form an open, porous wet mat.
  • the open, porous mat is preferably of a thickness to yield a finished product having a thickness between about 1/4 and 2 inches.
  • the mineral fiber for use in the present invention may be any of the conventional fibers prepared by attenuating a molten stream of basalt, slag, granite or other vitreous mineral constituent drawn linearly through orifices, referred to commonly as textile fibers, or tangentially off the face of a spinning cup or rotor, referred to as wool fibers. Included also are ceramic fibers and the like and aromatic polyamide fibers and the like.
  • the lightweight aggregate preferably is of exfoliated or expanded volcanic glass origin. Such aggregate includes the well known expanded perlite, exfoliated vermiculite, exfoliated clays and the like products which are available in a variety of mesh sizes. Generally expanded perlite is preferred for reasons of availability and economy.
  • the homogeneously mixed, ionically coupled and slightly foamed slurry is deposited on the wire 40 as a very open, porous entangled mass of mineral wool and lightweight aggregate with a small amount of uniformly sized transient bubbles of air.
  • the air occupies about 10-30% by volume of the wet entangled mass at this time, the remainder of the interstices between the lightweight aggregate and mineral fiber comprising water, and the aqueous slurry at this point containing still about 3 to 6 weight % solids.
  • the open, lightly foamed wet mass is deposited from forming box 30 onto a bottom scrim cover sheet 43 above the wire 40 as the slurry and scrim 43 float through a first flooded section 42 on the moving wire 40.
  • High vacuum drainage section 44 Discharge of water from the open, wet, slightly foamed mass occurs in high vacuum drainage section 44, as a top cover sheet 47 is optionally laid over the open wet porous foam mass via roller 36.
  • high vacuum section 44 a couple of very brief bursts (about 1 second) of a pressure differential equivalent to about 3-20, preferably about 4 to about 6, inches of mercury break the bubble walls of the slight foam that had been formed and strips water from the wet mass. It was observed in this section of the process that in a matter of 1 to 3 seconds the foam has collapsed and the draining liquid coats the contact points on the highly voided, open, entangled mass of the fiber and aggregate and scrim cover sheet(s).
  • the mat was formed upon 1 or 2 cover sheets.
  • cover sheets may be of paper, woven glass fiber, non-woven glass fiber and similar sheet materials.
  • a particularly preferred cover sheet is a non-woven glass fiber scrim, such as battery type scrim, having a weight of about 0.4-2.5 pounds per hundred square feet.
  • the top scrim 47 may be left off and, after the water stripping and drying section 49, a viscous, screedable pulp such as the set forth in U.S.
  • Patents 1,769,519; 1,996,033; and 3,246,063 may be applied as an overlay and the wet pulp surface textured by suitable means to provide a pleasing appearance, and the composite panel-overlay dried in a conventional convection drying oven (not shown in the drawing).
  • a conventional convection drying oven not shown in the drawing.
  • both top and bottom scrims may be in place before application of such a pulp overlay.
  • conventional finishing operations such as the application of various prime, texture, or protective coatings may be applied to the panels produced in accordance with the present invention.
  • the ordinarily first gravity drainage box section of the wire 40 was flooded with water to the level of the scrim 43 and the dilute furnish passed from the mixer 10 to the flow box 30 and deposited onto the scrim (battery grade 2.4 pounds per hundred square feet of nonwoven fiber glass scrim). It was observed that a very homogeneous open, entangled mass of mineral wool and lightweight aggregate having a small number of small delicate nonresilient foam bubbles interspersed therin was deposited in the flooded section 42.
  • the heated air may be provided at a temperature of about 37°-205°C, preferably about 175°C.
  • EXAMPLE 2 In a series of short static board forming runs, various of the components were evaluated for their effect in panel formation by halving and then doubling the presently preferred amount of the particular component as used in Example 1. As part of these evaluations, the weight of the produced panel after the through-air-drying procedure (T-A-D weight) was measured; and then the samples were placed in a convection oven and dried overnight to a constant weight (Oven weight) for comparison and the difference in weight from through-air drying to bond dry weight was determined. Representative results are set forth in the Table following Example 4. Because the purpose of this study was only to assess the moisture holding tendency of the various components, no attempt was made to reach the 3% moisture level by the through-air-drying procedure.
  • Example 3 The general procedure of Example 1 is followed except that the cooking temperature of the starch is about 170°F. The moisture content is reduced to below 3% in 10 minutes. Results similar to those of Example 1 are obtained.
  • Example 4 The general procedure of Example 1 is followed except that pearl corn starch from Staley is used in place of the wheat starch and it is cooked at about 168°F. The moisture content is reduced to below 3% in 10 minutes. Results similar to those of Example 1 are obtained. TABLE
  • Doubling the amount of the low foaming non-ionic surfactant did not significantly change the nature of the rather delicate, non-resilient bubbles, did not significantly inhibit bursting of the bubbles and stripping of water by through-air passage and did not result in significant separation of fiber and aggregate during water stripping.
  • a number of previous attempts had encountered considerable layering of the ingredients due to perlite segregating and floating and starch and wool fiber segregating and sinking, and the layering destroying the rapid through-air drainage.
  • the present invention provides a method for manufacturing structural mineral panel products of widely varying densities, properties and uses.
  • Various panel thicknesses from about l/8th inch through 2 inches or more may be attained.
  • Very lightweight products having densities ranging from about 3 through about 10 pounds per cubic foot or more may be formed from a dilute mineral fiber furnish.
  • Additional ingredients and other adjuvants customary in the art for particular added purposes may be present, even in major accounts, for their known effects. For example, dyes, pigments, antioxidants, water repellants, fire retardants, biocides and the like may be added.
  • Additional conventional steps for forming particular various manufactured articles such as cutting, trimming, shaping, adding slots, tabs and the like for ceiling grid suspension or other mountings; painting, texturing, surface overlaying and similar decorating and finishing features may be performed without departing from the spirit and scope of the present invention.
  • Various apparatus may be utilized as mixing vessels including turbine and impeller mixers of various configuration and design, and various flow boxes including flotation foaming cells and conventional forming head boxes as used in conventional batch and continuous foraminous support wire forming operations may be used.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Textile Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paper (AREA)

Abstract

Est décrit un procédé pour la fabrication de panneaux structuraux en laine de roche de très faible masse volumique sur un fil métallique de support ajouré en mouvement. Une composition aqueuse diluée de laine de roche, d'aggloméré léger, d'amidon non gélatineux cuit, de gomme de guar cationique et de tensio-actif non ionique est formée, mélangée pour former une petite quantité de bulles légères non élastiques et coupler par voie ionique les surfaces minérales à l'amidon et à la gomme, puis déposée sur le fil métallique pour former une masse emmêlée poreuse ouverte qui est rapidement débarrassée de son eau et séchée dans une configuration à circulation.
PCT/US1990/003327 1989-06-23 1990-06-15 Panneau en laine de roche de faible masse volumique et procede Ceased WO1991000176A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US37085689A 1989-06-23 1989-06-23
US370,856 1989-06-23

Publications (1)

Publication Number Publication Date
WO1991000176A1 true WO1991000176A1 (fr) 1991-01-10

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PCT/US1990/003327 Ceased WO1991000176A1 (fr) 1989-06-23 1990-06-15 Panneau en laine de roche de faible masse volumique et procede

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0471597A1 (fr) * 1990-07-30 1992-02-19 Rhone-Poulenc Chimie Composition comportant un polysaccharide obtenu par fermentation microbienne
CN101497214B (zh) * 2008-02-01 2011-06-22 北新集团建材股份有限公司 一种轻质矿棉板的生产系统
CN114131747A (zh) * 2021-12-20 2022-03-04 万华生态板业集成设备有限公司 珍珠岩板材的加工方法及其装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4265979A (en) * 1978-06-05 1981-05-05 United States Gypsum Company Method for the production of glass fiber-reinforced gypsum sheets and gypsum board formed therefrom

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4062721A (en) * 1976-10-26 1977-12-13 Conwed Corporation Use of surfactant to increase water removal from fibrous web

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4265979A (en) * 1978-06-05 1981-05-05 United States Gypsum Company Method for the production of glass fiber-reinforced gypsum sheets and gypsum board formed therefrom

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0471597A1 (fr) * 1990-07-30 1992-02-19 Rhone-Poulenc Chimie Composition comportant un polysaccharide obtenu par fermentation microbienne
CN101497214B (zh) * 2008-02-01 2011-06-22 北新集团建材股份有限公司 一种轻质矿棉板的生产系统
CN114131747A (zh) * 2021-12-20 2022-03-04 万华生态板业集成设备有限公司 珍珠岩板材的加工方法及其装置

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Publication number Publication date
AU608463B2 (en) 1991-03-28
AU4251789A (en) 1991-01-03

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