WO2001011129A1 - Composite structure incorporating a composite material - Google Patents

Composite structure incorporating a composite material Download PDF

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Publication number
WO2001011129A1
WO2001011129A1 PCT/US2000/021653 US0021653W WO0111129A1 WO 2001011129 A1 WO2001011129 A1 WO 2001011129A1 US 0021653 W US0021653 W US 0021653W WO 0111129 A1 WO0111129 A1 WO 0111129A1
Authority
WO
WIPO (PCT)
Prior art keywords
fibers
matrix
web portion
composite material
binder composition
Prior art date
Application number
PCT/US2000/021653
Other languages
French (fr)
Inventor
James C. Kostelno
Larry E. Morris
Original Assignee
Bontex, Inc.
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 Bontex, Inc. filed Critical Bontex, Inc.
Priority to AU68965/00A priority Critical patent/AU6896500A/en
Publication of WO2001011129A1 publication Critical patent/WO2001011129A1/en

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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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
    • 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
    • B32B5/02—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 structural features of a fibrous or filamentary layer
    • 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
    • B32B5/28—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 impregnated with or embedded in a plastic substance
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • 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
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/024—Honeycomb
    • 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
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/07—Parts immersed or impregnated in a matrix
    • 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
    • B32B2479/00—Furniture
    • 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
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for

Definitions

  • the invention relates to a composite structure having a corrugated, fluted, pleated or the like matrix, especially a composite sandwich construction, to be used in the packaging, construction, transportation, recreational, furniture and aerospace industries.
  • Still a further object of the invention is to provide composite structures having a matrix having a balance of stiffness and softness to provide good energy dissipation.
  • Yet another object of the invention is to provide composite structures having a matrix which is water-resistant and does not deteriorate, crack, or become brittle and harden after being wetted.
  • a further object of the invention is to provide composite structures having a matrix for use in those applications where resistance to mold, mildew and fungi are required.
  • An additional object of the invention is to provide composite structures having a matrix which is easily secured in position between solid and flexible surfaces.
  • An even further object of the invention is to provide composite structures having a matrix made from renewable, recyclable, and/or recycled components, utilizing post-consumer waste.
  • An additional object of the invention is to provide composite structures having a matrix which may be combined with all known adhesive systems including, but not be limited to, water-based, synthetic or natural latex, as well as 100% solids hot melt systems.
  • the invention relates to composite structures or products for use in the packaging, construction, transportation, recreational, furniture and aerospace industries which have improved durability and are lighter than conventional products.
  • the invention provides composite structures or products for the manufacture of boxes, cartons, containers, or lids and for use in the construction, transportation, recreational, furniture, and aerospace industries.
  • the matrix may be used as a sound absorber or reinforcing matrix in hollow core doors, or as a reinforcement of fiberglass boat hulls, shower stalls, and bathtubs.
  • the products are made of a composite matrix material having a substantially continuous web portion impregnated with a binder composition.
  • the web portion of the composite material is made of a particulate, matrix forming material, preferably a natural or synthetic fibrous material.
  • the binder composition binds the particulate, matrix forming material in the web and imparts resiliency and water resistance to the composite material.
  • the binder composition is a natural or synthetic rubber latex.
  • the single face or double faced corrugated, fluted, pleated or the like matrix material has superior physical strength as related to ring crush, edge crush and puncture resistance as well as improved dimensional stability.
  • the corrugated, fluted, pleated or the like impregnated fiber matrix may be resaturated.
  • the invention provides products which exhibit superior dimensional stability, maintain a proper balance of rigidity and flexibility during their useful lives and are resistant to cracking and embrittlement, which contribute to durability.
  • the composite material for the matrix may be made by methods based on paper making processes, including, but not limited to, wet web impregnation, dry web impregnation, latex beater deposition, and continuous latex wet-end deposition.
  • the impregnated matrix materials may be produced in gauges ranging from 0.005 to .126" in single ply or laminated form.
  • the impregnated matrix material may be produced in electrostatic dissipative (ESD) as well as conductive form.
  • ESD electrostatic dissipative
  • the impregnated matrix materials may be treated, for example, to resist mold and mildew.
  • the composite matrix material is produced in the form of sheets or rolls, and the matrix material can be corrugated, fluted, pleated or the like from roll or sheet form.
  • the composite matrix material can be fixedly secured, by mechanical and/or chemical methods, to a liner(s) or facer(s) to create composite structures or products of either single faced or double faced construction.
  • the composite structures or products may be combined with other products, single faced or double faced, and may be combined with other lesser quality composites.
  • the FIGURE is a cross-sectional view of at least one first layer of a composite material having a substantially continuous web portion and a plurality of alternating ridges and grooves, and at least one second layer, more specifically two second layers, attached to the first layer in accordance with the present invention.
  • the FIGURE shows a double faced composite structure 10 having a matrix or medium layer 12 formed from a composite material and top and bottom liners, facers or layers 14 and 16, respectively.
  • the composite structure or combination is made of a composite material having a substantially continuous web portion impregnated with a binder composition.
  • the composite material is a matted, felted, non-woven sheet containing a web portion optionally with web portion additives, and a binder composition optionally with binder additives.
  • the web portion and web portion additives preferably comprise from about 50% to about 90% by weight of the dry weight of the composite material, and more preferably comprise from about 65% to about 75% by weight of the dry weight of the composite material.
  • the binder composition and binder additives preferably comprise from about 10% to about 50% by weight of the dry weight of the composite material, and more preferably comprise from about 25% to about 35% by weight of the dry weight of the composite material.
  • the web portion of the composite mate ⁇ al includes at least one particulate, matrix- forming component
  • suitable particulate, matnx- forming matenals include natural fibers including cellulosic fibers de ⁇ ved from a single source or a plurality of sources such as wood pulp, rags and cotton hnters, and other cotton and vegetable fibers such as flax, hemp, abaca, jute, straw, ramie, sisal, istle, china grass, cotton grass, agave, pita, esparto, eucalyptus, evergreen and coniferous wood fibers, deciduous and broad-leaf hardwood fibers, comminuted and macerated waste fibers, viscose fibers, regenerated cellulose or cuprammonium type
  • the particulate mat ⁇ x-formmg component is a fibrous mate ⁇ al having a denier of about 0 2 microns to about 40 microns and a fiber length of about 0 1 millimeter to about
  • the binder composition is a mate ⁇ al capable of binding the particulate matrix- forming component in the web and preferably includes at least one natural or synthetic rubber latex
  • suitable synthetic rubber latices include resms such as styrene-butadiene, carboxylated styrene-butadiene, polyacryhc ester, polymethacryhc ester, copolymers of acrylic ester and methacryhc ester, acrylomt ⁇ le-acryhc ester copolymer, polyvinyl acetate, polyisobutylene, a copolymer of vinyl acetate and acrylic ester, polychloroprene, acrylomt ⁇ lebutadiene, carboxylated acrylomt ⁇ le butadiene, polyurethanes.
  • the binder composition may include a single natural or synthetic rubber latex or a mixture of two or more such rubber latices An especially prefe ⁇ ed binder composition comp ⁇ ses styrene-butadiene
  • the binder composition imparts water resistance to the composite matenal. while maintaining the other desirable properties of the web portion of the composite mate ⁇ al
  • both the web portion and the binder composition optionally contain additives
  • additives function as processing additives and/or end product additives to achieve certain desired results during the manufacture of the composite mate ⁇ al and/or to impart certain desired characteristics to the combination
  • Additives are classified as "web portion” additives and "binder” additives based on which component, the web forming component or the binder composition, the additive is initially mixed with.
  • the same types of additives can be both web portion additives and binder additives.
  • the additives useful in the composite material are conventional additives, which are used for their known properties in preparing the composite material of the invention.
  • suitable web portion additives include antifungal agents, antimildew agents, antibacterial agents, dyes, pigments, dispersants, wet strength aids, web processing aids, defoamers and sizing agents.
  • suitable binder additives include: surfactants, antioxidants, lubricants, crosslinking agents, catalysts, anti-ozonates, emulsifiers, wetting agents, colloidal stabilizing agents, vulcanizing agents, sizing agents, and defoamers.
  • the total amount of additives, both web portion and binder additives, in the composite material is preferably between about 0.5% and about 5.0% by weight based on the dry weight of the composite material.
  • the composite material has a thickness of between about 0.005 inch and 0.126 inch, more typically between about 0.015 and
  • Composite materials for use in this invention can be made by modified paper-making processes wherein an aqueous slurry of the matrix-forming component and optionally the web portion additives is formed and then the slurry or a web formed from the slurry is impregnated with the binder composition and optionally the binder additives.
  • modified paper-making processes in particular can be used to make the composite material for the combination of this invention: wet web impregnation; dry web impregnation; latex beater deposition and continuous latex- wet-end deposition.
  • fibrous is to be construed as including particulate matrix-forming materials which are not technically fibers.
  • the basic processes discussed herein are modified paper making processes, which do involve primarily cellulosic fibers as the web or matrix-fonning component, the conventional term "fibrous" will be used.
  • the fibrous matrix-forming component(s) and web portion additive are dispersed in water to prepare a slurry stock and the slurry stock passes through a refiner or beater which cuts the fibers and ruptures the surfaces of the fibers to improve their bondability
  • the refined slurry stock is fed to a sheet former of conventional construction
  • a fibrous web is formed by removal of water from the approximately 99% by weight water content of the refined slurry stock feed to a fibrous web having about 72% by weight water
  • a press section which removes water from the web to reduce the water content to about 50% to 60% by weight
  • the pressed web then passes to a saturator which introduces the binder composition and binder additives into the fibrous web
  • Excess binder composition and bmder additives are removed from the fibrous web and then the binder impregnated fibrous web passes to dryers which dry the impregnated web to a moisture content less
  • the dry web impregnation is similar to the wet web impregnation method, with the exception that the fibrous web proceeds directly to the dryers from the press section to produce a dry, non-impregnated fibrous web
  • the fibrous web is subsequently impregnated with the binder composition and binder additives, m a separate production process, by passing the dry fibrous web through a bath of the binder composition and binder additives, removing excess binder composition and binder additives, and then drying the impregnated web to a moisture content less than about 3% by weight
  • the bmder composition and bmder additives are mixed with the refined slurry stock in a latex deposition chest before the slurry stock is fed to the sheet former
  • a deposition agent or combination of agents is added to the latex deposition chest as well, to break the binder latex composition and deposit binder panicles uniformly on the fibers
  • the binder composition and binder additives are mixed with the refined fiber slurry stock in a batch
  • the continuous latex wet-end deposition method differs from the latex beater deposition method in that the binder composition and binder additives are introduced into the slurry stock, before the sheet former, continuously rather than m a batchwise manner
  • all binder composition and binder additives are added to the slurry stock before the slurry is formed into a web by the sheet foroier, for example, at the inlet to a fan pump or in the headbox of the sheet former
  • the above methods are examples of methods for making the composite mate ⁇ al for the composite structure or combination of the invention, but should not be construed as the only suitable methods.
  • the composite material made by the above methods is in the form of large, continuous sheets which can be cut and stacked or can be rolled around a supporting core.
  • the composite material is corrugated, fluted, pleated or the like and combined with one or more facers or liners or incorporated into other structures using conventional techniques and equipment well known in the art.
  • the facers or liners or other layers of the composite structures or products may be made of any conventional material including a substantially continuous web as described herein either impregnated or not impregnated with a binder composition.
  • an elastomeric matrix material is specifically designed for use as reinforcement in composite sandwich constructions.
  • the matrix material is fluted or corrugated or the like to produce a matrix with a high strength-to-weight ratio.
  • the wet web saturation process for example, is used to produce a material which is fluted, for example, to the maximum potential with maximum resistance to crushing of the flutes.
  • the matrix material offers dry and wet dimensional stability and is thermoplastic for molding or fluting or the like. It is water-resistant and contains excellent physical properties even when wet.
  • the matrix may be treated to be resistant to the growth and harmful action of bacteria, fungi and mold.
  • the products are preferably made from cellulose fibers which are formed into a web that is then saturated in a latex bath. The latex impregnates the fibers and coats each fiber within the web. In curing and drying, this web is chemically bonded to give a product which has high internal and overall strength, good dimensional stability and excellent aging properties.
  • a typical composite structure is a matrix material web as described above in co ⁇ ugated form having a gauge of .018" combined with a kraft liner or sheet having a gauge of .009" to form a single faced product.
  • Another typical composite structure is a matrix material web as described above in corrugated form having a gauge of .018" combined with a matrix material as described above in sheet form having a gauge of .018" to form a single face product.

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  • Laminated Bodies (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

A combination made of a composite material (10) having a substantially continuous web portion impregnated with a binder composition. The web portion of the composite material is made of a particulate, matrix-forming material (12), preferably a natural or synthetic fibrous material. The binder composition binds the particulate, matrix-forming material in the web and imparts water resistance and other desirable properties to the composite material. Preferably, the binder composition is a natural or synthetic rubber latex. The composition material has alternating ridges and grooves. The composition material is attached to at least one second layer (14) to form, for example, a sandwiched structure which is single or double faced.

Description

COMPOSITE STRUCTURE INCORPORATING A COMPOSITE MATERIAL
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a composite structure having a corrugated, fluted, pleated or the like matrix, especially a composite sandwich construction, to be used in the packaging, construction, transportation, recreational, furniture and aerospace industries.
2. Description of the Related Art
For many years, manufacturers have produced matrix materials through corrugation, fluting, pleating and the like for use in packaging, construction, transportation, recreational, furniture, and aerospace industries. A primary purpose for the use of such matrix materials has been to reinforce the traditional kraft liner.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide composite structures having a matrix with superior structural strength to be used in the packaging, construction, transportation, recreational and aerospace industries which has improved properties relative to known composite structures.
It is a further object of the invention to provide composite structures having a matrix which is dimensionally stable under compressive stress. Yet a further object of the invention is to provide composite structures having a matrix which is gas and moisture permeable.
It is another object of the invention to provide shock absorbing composite structures having a matrix made of latex impregnated composite materials.
Still a further object of the invention is to provide composite structures having a matrix having a balance of stiffness and softness to provide good energy dissipation.
Yet another object of the invention is to provide composite structures having a matrix which is water-resistant and does not deteriorate, crack, or become brittle and harden after being wetted.
A further object of the invention is to provide composite structures having a matrix for use in those applications where resistance to mold, mildew and fungi are required.
It is another object of the invention to provide composite structures having a matrix which is light and heat resistant, and which acts as an insulator to prevent transmission of heat.
An additional object of the invention is to provide composite structures having a matrix which is easily secured in position between solid and flexible surfaces.
An even further object of the invention is to provide composite structures having a matrix made from renewable, recyclable, and/or recycled components, utilizing post-consumer waste. An additional object of the invention is to provide composite structures having a matrix which may be combined with all known adhesive systems including, but not be limited to, water-based, synthetic or natural latex, as well as 100% solids hot melt systems.
It is still a further object of the invention to provide composite structures having a matrix that may be produced with natural and synthetic fibers that may be used for electrostatic dissipative and/or conductive requirements.
In accordance with the foregoing objects, the invention relates to composite structures or products for use in the packaging, construction, transportation, recreational, furniture and aerospace industries which have improved durability and are lighter than conventional products. The invention provides composite structures or products for the manufacture of boxes, cartons, containers, or lids and for use in the construction, transportation, recreational, furniture, and aerospace industries. In certain applications, the matrix may be used as a sound absorber or reinforcing matrix in hollow core doors, or as a reinforcement of fiberglass boat hulls, shower stalls, and bathtubs.
The products are made of a composite matrix material having a substantially continuous web portion impregnated with a binder composition. The web portion of the composite material is made of a particulate, matrix forming material, preferably a natural or synthetic fibrous material. The binder composition binds the particulate, matrix forming material in the web and imparts resiliency and water resistance to the composite material. Preferably, the binder composition is a natural or synthetic rubber latex. The single face or double faced corrugated, fluted, pleated or the like matrix material has superior physical strength as related to ring crush, edge crush and puncture resistance as well as improved dimensional stability.
The corrugated, fluted, pleated or the like impregnated fiber matrix may be resaturated. The invention provides products which exhibit superior dimensional stability, maintain a proper balance of rigidity and flexibility during their useful lives and are resistant to cracking and embrittlement, which contribute to durability.
The composite material for the matrix may be made by methods based on paper making processes, including, but not limited to, wet web impregnation, dry web impregnation, latex beater deposition, and continuous latex wet-end deposition. The impregnated matrix materials may be produced in gauges ranging from 0.005 to .126" in single ply or laminated form. The impregnated matrix material may be produced in electrostatic dissipative (ESD) as well as conductive form. The impregnated matrix materials may be treated, for example, to resist mold and mildew. The composite matrix material is produced in the form of sheets or rolls, and the matrix material can be corrugated, fluted, pleated or the like from roll or sheet form. The composite matrix material can be fixedly secured, by mechanical and/or chemical methods, to a liner(s) or facer(s) to create composite structures or products of either single faced or double faced construction. The composite structures or products may be combined with other products, single faced or double faced, and may be combined with other lesser quality composites.
BRIEF DESCRIPTION OF THE DRAWING
The FIGURE is a cross-sectional view of at least one first layer of a composite material having a substantially continuous web portion and a plurality of alternating ridges and grooves, and at least one second layer, more specifically two second layers, attached to the first layer in accordance with the present invention.
DETAILED DESCRIPTION OF THE INVENTION Referring now to the drawing, there is shown a composite structure in accordance with the invention.
The FIGURE shows a double faced composite structure 10 having a matrix or medium layer 12 formed from a composite material and top and bottom liners, facers or layers 14 and 16, respectively. According to the invention, the composite structure or combination is made of a composite material having a substantially continuous web portion impregnated with a binder composition. The composite material is a matted, felted, non-woven sheet containing a web portion optionally with web portion additives, and a binder composition optionally with binder additives. The web portion and web portion additives preferably comprise from about 50% to about 90% by weight of the dry weight of the composite material, and more preferably comprise from about 65% to about 75% by weight of the dry weight of the composite material. The binder composition and binder additives preferably comprise from about 10% to about 50% by weight of the dry weight of the composite material, and more preferably comprise from about 25% to about 35% by weight of the dry weight of the composite material. The web portion of the composite mateπal includes at least one particulate, matrix- forming component Examples of suitable particulate, matnx- forming matenals include natural fibers including cellulosic fibers deπved from a single source or a plurality of sources such as wood pulp, rags and cotton hnters, and other cotton and vegetable fibers such as flax, hemp, abaca, jute, straw, ramie, sisal, istle, china grass, cotton grass, agave, pita, esparto, eucalyptus, evergreen and coniferous wood fibers, deciduous and broad-leaf hardwood fibers, comminuted and macerated waste fibers, viscose fibers, regenerated cellulose or cuprammonium type fibers, and rayon; synthetic fibers including polyolefins such as polyethylene, polypropylene and polybutylene, polyesters, nylons, acryhcs, acetates, polyacrylomtπles, polycarbonates, tπacetates, nytπl, spandex, vmal and vinyon, wool fibers, glass fibers, mineral fibers, leather fibers, carbon fibers, ground cork, ground rubber, and mixtures thereof Of these matπx-forming matenals, natural fibers and/or synthetic fibers are prefeπed, with natural fibers being the more prefeπed An especially preferred matπx- forming mateπal is cellulosic fibers from one or more sources
Preferably, the particulate matπx-formmg component is a fibrous mateπal having a denier of about 0 2 microns to about 40 microns and a fiber length of about 0 1 millimeter to about
20 millimeters
The binder composition is a mateπal capable of binding the particulate matrix- forming component in the web and preferably includes at least one natural or synthetic rubber latex Examples of suitable synthetic rubber latices include resms such as styrene-butadiene, carboxylated styrene-butadiene, polyacryhc ester, polymethacryhc ester, copolymers of acrylic ester and methacryhc ester, acrylomtπle-acryhc ester copolymer, polyvinyl acetate, polyisobutylene, a copolymer of vinyl acetate and acrylic ester, polychloroprene, acrylomtπlebutadiene, carboxylated acrylomtπle butadiene, polyurethanes. a copolymer of ethylene and viny l acetate, acrylonitnle butadiene styrene, polyvmy dene (dι)chloπde, carboxylated butadiene styrene vmy dene chioπde terpolymers, polyisoprene (natural and synthetic) and other elastomeπc co-, ter-, and multi- polymers The binder composition may include a single natural or synthetic rubber latex or a mixture of two or more such rubber latices An especially prefeπed binder composition compπses styrene-butadiene
The binder composition imparts water resistance to the composite matenal. while maintaining the other desirable properties of the web portion of the composite mateπal
As noted above, both the web portion and the binder composition optionally contain additives These additives function as processing additives and/or end product additives to achieve certain desired results during the manufacture of the composite mateπal and/or to impart certain desired characteristics to the combination Additives are classified as "web portion" additives and "binder" additives based on which component, the web forming component or the binder composition, the additive is initially mixed with. Thus, the same types of additives can be both web portion additives and binder additives.
The additives useful in the composite material are conventional additives, which are used for their known properties in preparing the composite material of the invention. Examples of suitable web portion additives include antifungal agents, antimildew agents, antibacterial agents, dyes, pigments, dispersants, wet strength aids, web processing aids, defoamers and sizing agents. Examples of suitable binder additives include: surfactants, antioxidants, lubricants, crosslinking agents, catalysts, anti-ozonates, emulsifiers, wetting agents, colloidal stabilizing agents, vulcanizing agents, sizing agents, and defoamers.
The total amount of additives, both web portion and binder additives, in the composite material is preferably between about 0.5% and about 5.0% by weight based on the dry weight of the composite material.
Preferably, for use as a single ply or laminated material, the composite material has a thickness of between about 0.005 inch and 0.126 inch, more typically between about 0.015 and
0.026 inch.
The phrase "plurality of alternating ridges and grooves" as used herein is to be construed as including corrugated, fluted, pleated, scored and honeycomb structures which are per se well known in the art. Composite materials for use in this invention can be made by modified paper-making processes wherein an aqueous slurry of the matrix-forming component and optionally the web portion additives is formed and then the slurry or a web formed from the slurry is impregnated with the binder composition and optionally the binder additives. The following modified paper-making processes in particular can be used to make the composite material for the combination of this invention: wet web impregnation; dry web impregnation; latex beater deposition and continuous latex- wet-end deposition. Each of the processes will be described briefly below. Detailed examples of these types of processes can be found in U.S. Patent No. 4,245,689.
In the following discussion, the term "fibrous" is to be construed as including particulate matrix-forming materials which are not technically fibers. However, since the basic processes discussed herein are modified paper making processes, which do involve primarily cellulosic fibers as the web or matrix-fonning component, the conventional term "fibrous" will be used.
In the wet web impregnation method, the fibrous matrix-forming component(s) and web portion additive are dispersed in water to prepare a slurry stock and the slurry stock passes through a refiner or beater which cuts the fibers and ruptures the surfaces of the fibers to improve their bondability The refined slurry stock is fed to a sheet former of conventional construction On the sheet former, a fibrous web is formed by removal of water from the approximately 99% by weight water content of the refined slurry stock feed to a fibrous web having about 72% by weight water Following formation of the continuous fibrous web on the sheet former, it passes to a press section which removes water from the web to reduce the water content to about 50% to 60% by weight The pressed web then passes to a saturator which introduces the binder composition and binder additives into the fibrous web Excess binder composition and bmder additives are removed from the fibrous web and then the binder impregnated fibrous web passes to dryers which dry the impregnated web to a moisture content less than about 3% by weight Subsequent conventional steps such as printing, coating, calendaπng, laminating and the like can then be performed as desired
The dry web impregnation is similar to the wet web impregnation method, with the exception that the fibrous web proceeds directly to the dryers from the press section to produce a dry, non-impregnated fibrous web The fibrous web is subsequently impregnated with the binder composition and binder additives, m a separate production process, by passing the dry fibrous web through a bath of the binder composition and binder additives, removing excess binder composition and binder additives, and then drying the impregnated web to a moisture content less than about 3% by weight In the latex beater deposition method, the bmder composition and bmder additives are mixed with the refined slurry stock in a latex deposition chest before the slurry stock is fed to the sheet former A deposition agent or combination of agents is added to the latex deposition chest as well, to break the binder latex composition and deposit binder panicles uniformly on the fibers The binder composition and binder additives are mixed with the refined fiber slurry stock in a batchwise manner The binder-containing slurry is then fed to the sheet former, press section, and dryers to produce the composite mateπal There is no additional bmder composition deposited on the web after sheet forming m this process
The continuous latex wet-end deposition method differs from the latex beater deposition method in that the binder composition and binder additives are introduced into the slurry stock, before the sheet former, continuously rather than m a batchwise manner In this continuous method, all binder composition and binder additives are added to the slurry stock before the slurry is formed into a web by the sheet foroier, for example, at the inlet to a fan pump or in the headbox of the sheet former
The above methods are examples of methods for making the composite mateπal for the composite structure or combination of the invention, but should not be construed as the only suitable methods. The composite material made by the above methods is in the form of large, continuous sheets which can be cut and stacked or can be rolled around a supporting core.
To make the composite structure or combination according to the invention, the composite material is corrugated, fluted, pleated or the like and combined with one or more facers or liners or incorporated into other structures using conventional techniques and equipment well known in the art. The facers or liners or other layers of the composite structures or products may be made of any conventional material including a substantially continuous web as described herein either impregnated or not impregnated with a binder composition. To further illustrate the invention, an elastomeric matrix material is specifically designed for use as reinforcement in composite sandwich constructions. The matrix material is fluted or corrugated or the like to produce a matrix with a high strength-to-weight ratio. The wet web saturation process, for example, is used to produce a material which is fluted, for example, to the maximum potential with maximum resistance to crushing of the flutes. The matrix material offers dry and wet dimensional stability and is thermoplastic for molding or fluting or the like. It is water-resistant and contains excellent physical properties even when wet. The matrix may be treated to be resistant to the growth and harmful action of bacteria, fungi and mold. The products are preferably made from cellulose fibers which are formed into a web that is then saturated in a latex bath. The latex impregnates the fibers and coats each fiber within the web. In curing and drying, this web is chemically bonded to give a product which has high internal and overall strength, good dimensional stability and excellent aging properties. The nature of this type of manufacturing process creates products with unique orientation. The fibers that make up the web are aligned in such a mariner that articles cut from them are extremely flexible in the cross machine direction, yet firm in the machine direction. The products will not harden, crack or buckle. A typical composite structure is a matrix material web as described above in coπugated form having a gauge of .018" combined with a kraft liner or sheet having a gauge of .009" to form a single faced product. Another typical composite structure is a matrix material web as described above in corrugated form having a gauge of .018" combined with a matrix material as described above in sheet form having a gauge of .018" to form a single face product. The invention has been described with reference to prefeπed embodiments and specific examples thereof which are considered illustrative only of the principles of the invention. Since numerous changes and modifications will readily occur to those skilled in the art, it is not desired to limit the invention to the exact embodiments shown and described, and suitable modifications may be made without departing from the scope of the invention as described above and as defined in the appended claims.

Claims

What is claimed is-
1. A combination, comprising at least one first layer of a composite material having a substantially continuous web portion impregnated with a binder composition, said web portion being made of a particulate, matnx-forming material and said binder composition being a material capable of binding the particulate, matrix-forming material in the web, said particulate, matrix-forming material being a fibrous mateπal, said composite material having a plurality of alternating ridges and grooves, and further comprising at least one second layer attached to said first layer
2. A combination according to claim 1 , wherein said web portion comprises a matted, felted, non- woven sheet material.
3 A combination according to claim 1. wherein said fibrous material is selected from the group consisting of natural cellulosic fibers and synthetic fibers.
4 A combination according to claim 1 , wherein said web portion comprises at least one particulate, matnx-forming component selected from the group consisting of cellulosic fibers deπved from wood pulp, rags and cotton liners, flax, hemp, abaca, jute, straw, ramie, sisal, istle, china grass, cotton grass, agave, pita, esparto, eucalyptus, evergreen and coniferous wood fibers, deciduous and broad-leaf hardwood fibers, comminuted and macerated waste fibers, viscose fibers, regenerated cellulose and cuprammomum type fibers, and rayon; polyethylene, polypropylene and polybutylene, polyesters, nylons, acrylics, acetates, polyacrylonitπles, polycarbonates, tπacetates, nytnl, spandex, vmal and vinyon; wool fibers; glass fibers; mineral fibers; leather fibers; carbon fibers; ground cork; ground rubber; and mixtures thereof
5 A combination according to claim 3, wherein said fibrous material has a denier of about 0.2 microns to about 40 microns and a fiber length of about 0.1 millimeter to about 20 millimeters
6 A combination according to claim 1. wherein said binder composition compπses at least one member selected from the group consisting of natural and synthetic rubber latices
7. A combination according to claim 6, wherein said binder composition comprises at least one rubber latex selected from the group consisting of styrene-butadiene, carboxylated styrene-butadiene, polyacrylic ester, polymethacrylic ester, copolymers of acrylic ester and methacrylic ester, acrylonitrile-acrylic ester copolymer, polyvinyl acetate, polyisobutylene, a copolymer of vinyl acetate and acrylic ester, polychloroprene, acrylonitrilebutadiene, carboxylated acrylonitrile butadiene, polyurethanes, a copolymer of ethylene and vinyl acetate, acrylonitrile butadiene styrene, polyvinylidene (di)chloride, carboxylated butadiene styrene vinylidene chloride terpolymers, and polyisoprene.
8. A combination according to claim 1, wherein said composite material is corrugated or fluted.
9. A combination according to claim 1, wherein said composite material is honeycombed.
10. A combination according to claim 1 , wherein said combination comprises two second layers attached to opposing surfaces of said at least one first layer.
1 1. A combination according to claim 1, wherein said combination is a single faced paperboard.
12. A combination according to claim 1, wherein said combination is a double faced paperboard.
13. A combination according to claim 1, wherein said web portion further comprises at least one web portion additive selected from the group consisting of antifungal agents, antimildew agents, antibacterial agents, dyes, pigments, dispersants, wet strength, web processing aids, defoamers and sizing agents, and said binder composition comprises at least one binder portion additive selected from the group consisting of surfactants, antioxidants, lubricants, crosslinking agents, catalysts, antiozonates, emulsifiers, wetting agents, colloidal stabilizing agents, vulcanizing agents, sizing agents, and defoamers.
14. A combination according to claim 13, wherein the total combined amount of said web portion and binder additives is between about 0.5% and about 5% by weight, based on the dry weight of said composite material.
15. A combination according to claim 1, wherein said web portion comprises about 50% to about 90% by weight of the dry weight of said composite material and said binder composition comprises about 10% to about 50% by weight of the dry weight of said composite material.
16. A combination according to claim 1 , wherein said combination is a packaging, construction, transportation, recreational, furniture or aerospace product.
17. A composite sandwich structure comprising at least one first layer of a composite material having a substantially continuous web portion impregnated with a binder composition, said web portion being made of a particulate, matrix-forming material and said binder composition being a rubber latex material capable of binding the particulate, matrix- forming material in the web, said particulate, matrix-forming material being a cellulosic fibrous material, said composite material having a plurality of alternating ridges and grooves, and further comprising at least one second layer attached to said first layer.
18. A structure according to claim 17, wherein said web portion comprises a matted, felted, non-woven sheet material.
19. A structure according to claim 17, wherein said cellulosic fibrous material is selected from the group consisting of cellulosic fibers derived from wood pulp, rags and cotton liners, flax, hemp, abaca, jute, straw, ramie, sisal, istle, china grass, cotton grass, agave, pita, esparto, eucalyptus, evergreen and coniferous wood fibers, deciduous and broad-leaf hardwood fibers, comminuted and macerated waste fibers, viscose fibers, regenerated cellulose and cuprammonium type fibers, and rayon.
20. A structure according to claim 19, wherein said fibrous material has a denier of about 0.2 microns to about 40 microns and a fiber length of about 0.1 millimeter to about 20 millimeters.
21. A structure according to claim 17, wherein said rubber latex material is selected from the group consisting of styrene-butadiene, carboxylated styrene-butadiene, polyacrylic ester, polymethacrylic ester, copolymers of acrylic ester and methacrylic ester, acrylonitrileacrylic ester copolymer, polyvinyl acetate, polyisobutylene, a copolymer of vinyl acetate and acrylic ester, polychloroprene, acrylonitrilebutadiene, carboxylated acrylonitrile butadiene, polyurethanes, a copolymer of ethylene and vinyl acetate, acrylonitrile butadiene styrene, polyvinylidene (di)chloπde, carboxylated butadiene styrene vinylidene chloride terpolymers, and polyisoprene.
22. A structure according to claim 17, wherein said composite material is corrugated, fluted, pleated, scored or honeycombed.
23. A structure according to claim 17, wherein said structure comprises two second layers attached to opposing surfaces of said at least one first layer.
24. A composite sandwich structure, comprising at least one first layer of a composite material having a substantially continuous web portion impregnated with a binder composition, said web portion being made of a particulate, matrix- forming material and said binder composition being a rubber latex material capable of binding the particulate, matrix-foπning material in the web, said particulate, matrix- forming material being a fibrous cellulosic material, said composite material being corrugated, fluted or pleated, and further comprising at least one second layer attached to said first layer, said at least one second layer being a liner.
25. A structure according to claim 24, wherein said structure is a single faced paperboard.
26. A structure according to claim 24, wherein said structure is a double faced paperboard.
PCT/US2000/021653 1999-08-10 2000-08-09 Composite structure incorporating a composite material WO2001011129A1 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1950253A1 (en) * 2005-11-18 2008-07-30 Bussan Nanotech Research Institute Inc. Recycled composite material
GB2490539A (en) * 2011-05-06 2012-11-07 Wool Packaging Company Ltd Laminated packaging sheet comprising stiff and hygroscopic fibre layers
CN103085362A (en) * 2012-11-15 2013-05-08 苏州金尚豪纺织有限公司 Wind-resistant comfortable denim fabric
CN104558773A (en) * 2014-12-30 2015-04-29 苏州康华净化系统工程有限公司 Antibacterial polyethylene material used for air purifying equipment and preparation method thereof
CN107142775A (en) * 2017-05-22 2017-09-08 谷照林 Straw bulking composite packaging boxboard manufacturing process
CN108532123A (en) * 2018-04-04 2018-09-14 杭州诺邦无纺股份有限公司 A kind of spun lacing non-woven material and preparation method thereof containing natural dry petal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5505264A (en) * 1993-12-16 1996-04-09 Georgia Bonded Fibers, Inc. Leather-like hoof pad of composite material
US5508083A (en) * 1993-05-19 1996-04-16 Chapman, Jr.; Francis L. Machine direction fluted combined corrugated containerboard

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5508083A (en) * 1993-05-19 1996-04-16 Chapman, Jr.; Francis L. Machine direction fluted combined corrugated containerboard
US5505264A (en) * 1993-12-16 1996-04-09 Georgia Bonded Fibers, Inc. Leather-like hoof pad of composite material

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1950253A1 (en) * 2005-11-18 2008-07-30 Bussan Nanotech Research Institute Inc. Recycled composite material
EP1950253A4 (en) * 2005-11-18 2009-05-13 Mitsui Bussan Recycled composite material
GB2490539A (en) * 2011-05-06 2012-11-07 Wool Packaging Company Ltd Laminated packaging sheet comprising stiff and hygroscopic fibre layers
CN103085362A (en) * 2012-11-15 2013-05-08 苏州金尚豪纺织有限公司 Wind-resistant comfortable denim fabric
CN104558773A (en) * 2014-12-30 2015-04-29 苏州康华净化系统工程有限公司 Antibacterial polyethylene material used for air purifying equipment and preparation method thereof
CN107142775A (en) * 2017-05-22 2017-09-08 谷照林 Straw bulking composite packaging boxboard manufacturing process
CN108532123A (en) * 2018-04-04 2018-09-14 杭州诺邦无纺股份有限公司 A kind of spun lacing non-woven material and preparation method thereof containing natural dry petal

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