• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a composite material of a resin and cellulose or lignocellulosic fibers, and relates to a composite material using waste fibers and resin discarded after being used for single use and a method for producing the same. The present invention provides resins such as thermoplastics, composites containing textured cellulose or lignocellulosic fibers, and composite materials containing polyethylene and textured cellulose or lignocellulose fibers. In another aspect, the present invention comprises the steps of cutting the cellulose or lignocellulosic fibers to form textured cellulose or lignocellulosic fibers; Then it provides a method for producing a composite material comprising the step of combining the textured fibers with a resin. Composite materials according to the present invention can be utilized in various fields.
    公开号:KR20010031472A
    申请号:KR1020007004507
    申请日:1998-10-26
    公开日:2001-04-16
    发明作者:메도프마샬；라게이스아서
    申请人:메도프 마샬；질레코 인코포레이티드；
    IPC主号:
    专利说明:

    Cellulose fiber composites {CELLULOSIC FIBER COMPOSITES}
    Resin is used variously, such as packaging of food, for example. Food containers made of resin are especially discarded after one use.
    Cellulose or lignocellulosic materials are produced, developed and used in large quantities in many applications. Once used, these fibers are usually discarded as waste after they are used once. As a result, waste cellulose and lignocellulosic fibers are also in great quantities as waste resin.
    The present invention relates to a composite material of resin and cellulose or lignocellulosic fibers.
    1 is a 50 times magnified photograph of a textured newspaper paper.
    The present invention provides a composite material containing a resin and textured cellulose or lignocellulosic fibers.
    The present invention provides a composite material containing a resin, such as a thermoplastic, and at least 2% by weight, more preferably at least 5% by weight, of textured cellulose or lignocellulosic fibers. The present invention also provides a composite material containing polyethylene and at least 50% by weight of textured cellulose or lignocellulosic fibers.
    The present invention also provides a composite material containing a resin and cellulose or lignocellulosic fibers and having a flexural strength of at least about 3,000 psi or a tensile strength of at least about 3,000 psi.
    In addition, the present invention comprises the steps of cutting the cellulose or lignocellulosic fibers to form textured cellulose or lignocellulosic fibers; Then it provides a method for producing a composite material comprising the step of combining the textured fibers with a resin. It is preferable to use a rotary blade cutter in the process of cutting the fiber.
    As used herein, the term ″ textured cellulose or lignocellulosic ″ refers to fibers that have been cut such that the internal fibers are substantially exposed. At least 50% or more of the fiber, preferably at least 70%, has a length / diameter (L / D) ratio of at least 5, preferably 25, more preferably 50 or more. Examples of textured fibers can be seen in FIG. 1 below.
    The composite material of the present invention is strong, lightweight and inexpensive. The raw materials used to make this composite material can be easily obtained by including discarded containers made of resin and waste cellulose or lignocellulosic fibers.
    Preferred composite materials of the present invention contain resins and textured cellulose or lignocellulosic fibers.
    The resin helps to form a film surrounding the textured cellulose or lignocellulosic fibers and maintain the shape of the composite. The resin also protects the fiber from environmental and structural damage and delivers the external load of the fiber. Preferred composite materials contain 20 to 60% by weight, more preferably 30 to 50% by weight of resin.
    Examples of the resin include polyethylene (including low density polyethylene and high density polyethylene), polyethylene, polypropylene, polystyrene, polycarbonate, polybutylene, thermoplastic polyester, polyether, thermoplastic polyurethane, PVC, nylon and the like. The resin has a low melt index. Preferred resins contain polyethylene and polypropylene having a melt index of 3 g / 10 min or less, more preferably 1 g / 10 min or less.
    The resin may be new, but waste or waste may be used, or pellets may be purchased. Garbage or waste materials are preferred because they are inexpensive. Also, polyethylene milk bottles may be used as a preferred source of resin.
    Textured cellulose or lignocellulosic fibers provide high strength composites. The composite material comprises 30 to 90% by weight, more preferably 50 to 70% by weight of textured cellulose or lignocellulosic fibers. Examples of cellulose fibers are paper and paper products, and examples of lignocellulosic fibers are wood, wood fibers and wood-related materials such as kenaf, grass, rice hulls, bagasse, cotton, jute The material obtained from these, etc. are mentioned.
    The composite material also includes a binder. The binder helps to bind the hydrophilic fibers to the hydrophobic resin. Examples of the binder may include a maleic anhydride modified polyethylene such as FUSABOND ⓡ (Dupont, Delaware) and POLYBOND ⓡ (Uniroyal Chemical, Connecticut) series. Preferred binders there may be mentioned maleic acid-modified high-density polyethylene such as FUSABOND MB 100D ⓡ.
    The composite material may also include additives known in the field of compounds such as plasticizers, lubricants, antioxidants, opaque agents, thermal stabilizers, colorants, flame retardants, biocides, impact modifiers, light stabilizers, antistatic agents and the like.
    Preparation of Starting Material
    If waste cellulose or lignocellulosic fibers are used, they should be wiped clean and dried. The cellulose or lignocellulosic fibers must be textured before they can be combined with the thermoplastic resin. The fibers must be textured by one or a combination of mechanical means.
    As a preferred method of texturizing, cellulose or lignocellulosic fibers are cut into pieces of 1/4 to 1/2 inch in size using conventional cutting tools, and these pieces are cut into Perry's Chem. Eng. Cut with a rotary cutter such as Handbook, 6th edition, pages 8-29 (1984) (Sprout, Waldron Companies). The textured fibers are passed through a 2 mm mesh screen. The result should be stored in a sealed bag and dried immediately before use at about 105 ° C. for 4-18 hours (until the moisture content is less than 0.5%).
    The resin can be purchased in pellet or granule form and used without further purification or drying. However, if surface moisture is present in the resin in pellet or granule form, it should be dried before use.
    Manufacture of Composites
    The composite material can be produced as follows.
    The standard rubber / plastic composite two-roll mill is heated to 325-400 ° C. Resin (usually in pellet or granule form) is added to a heated roll mill. After about 10 minutes, a binder is added to the roll mill. After another 5 minutes, the textured cellulose or lignocellulose is added to the mixture of molten resin / binder. The textured fibers are added over about 10 minutes.
    The composite material is taken out of the roll mill, cut into sheets, and left to cool to room temperature. It is then compression cast into plaques using standard compression casting techniques.
    Alternatively, the ingredients are filled in a mixer such as a Banbury internal mixer. After mixing the components while maintaining the temperature below 190 ° C., the mixture may be compression cast.
    In another embodiment, the components can be mixed in an extrusion mixer, such as a MARIS (Turin) TM 85 extruder equipped with a co-rotating screw. Resin and binder are introduced into the extrusion feed port, and cellulose or lignocellulosic fibers feed about 1/3 of the extruder length to the molten resin. The internal temperature of the extruder is maintained to be 190 ° C or less. The composite material discharged is made into pellets by cold strand cutting.
    Alternatively, the mixture may be first prepared in a mixer, then transferred to an extruder and extruded, and cut into pellets.
    In another embodiment, the composite material may be made into fiber form using fiber manufacturing techniques known in the art.
    Properties of Composites
    The final composite material contains the network of fibers and is surrounded by a matrix of resin. The fiber has a lattice-shaped network structure and provides a composite having strength. Since cellulose or lignocellulosic fibers are textured, the amount of surface area for bonding with the resin is increased compared to that made with untextured cellulose or lignocellulosic fibers. The resin is bonded to the surface of the exposed fibers and forms a mixture of networked fibers and a resin matrix. Mixtures of fibers and resin matrices increase in strength more than composite materials.
    Other features and advantages of the invention will be apparent from the description and from the preferred embodiments and claims.
    The composite material was made as follows. Standard rubber / plastic composites were heated in a two-roll mill to 325-400 ° C. The resin (usually in the form of pellets or granules) was added to a heated roll mill. After about 10 minutes (melted) it was bound to the roll. After 5 minutes of addition of the binder to the roll mill, cellulose or lignocellulosic fibers were added to the molten resin / binder mixture. Cellulose or lignocellulosic fibers were added after about 10 minutes.
    The composite material was removed from the roll mill, cut into sheets, and left to cool to room temperature. Each 80 g was cast in the form of 6 ″ * 6 ″ * 1/8 ″ plaques using compression casting techniques.
    The prepared composite contains the following components.
    <Composite # 1>
    Ingredient amount (g)
    High density polyethyleneOne 160
    Old newspaper2 240
    Binder3 8
    The property of the compound # 1 is as follows.
    Refractive Strength (psi) 9,810 (ASTM D790)
    Refractive Modulus (10 9 psi) 6.27 (ASTM D790)
    <Composite # 2>
    Ingredient amount (g)
    High density polyethyleneOne 160
    Old magazine2 240
    Binder3 8
    The property of the compound # 2 is as follows.
    Refractive Strength (psi) 9,060 (ASTM D790)
    Refractive Modulus (10 9 psi) 6.78 (ASTM D790)
    -------------------------------------------------- -------------
    One: Marlex 16007,
    Textured using a 2 : 2 mm mesh rotary cutter.
    3 : FUSABOND ⓡ 100D
    The resin / fiber composite material may be utilized in various ways. The composite material is high strength and light weight; They can thus be used, for example, as a substitute for wood. The resin may be coated to provide a waterproof composite material, which may be utilized outdoors. For example, the composite material may make pallets that are stored outdoors for a long time.
    权利要求:
    Claims (19)
    [1" claim-type="Currently amended] A composite material comprising a resin and a fiber, wherein the fiber is cellulose or lignocellulosic, and at least 2% by weight of the composite material.
    [2" claim-type="Currently amended] The composite material of claim 1, wherein the fibers are textured by at least 5% by weight.
    [3" claim-type="Currently amended] The composite material according to claim 1, wherein the fibers are newspaper printing paper.
    [4" claim-type="Currently amended] The composite material of claim 1 wherein said fiber is jute.
    [5" claim-type="Currently amended] The composite material of claim 1 wherein said fiber is kenaf.
    [6" claim-type="Currently amended] A composite material according to claim 1, wherein said resin is magazine paper.
    [7" claim-type="Currently amended] The composite material of claim 1 wherein said resin is a bleached kraft board.
    [8" claim-type="Currently amended] The composite material of claim 1, wherein the resin is a thermoplastic resin.
    [9" claim-type="Currently amended] The composite material of claim 6, wherein the thermoplastic resin is polyethylene.
    [10" claim-type="Currently amended] The composite material of claim 6, wherein the thermoplastic resin is polypropylene.
    [11" claim-type="Currently amended] The composite material according to claim 1, wherein the content of the resin is 50 to 70% by weight and the content of the fiber is 37 to 50% by weight.
    [12" claim-type="Currently amended] A composite material comprising fibers and polypropylene, wherein the fibers are cellulose or lignocellulosic and are textured by at least 50% by weight.
    [13" claim-type="Currently amended] A composite material having a flexural strength of at least 3,000 psi or more, comprising a resin and cellulose or lignocellulosic fibers.
    [14" claim-type="Currently amended] The composite material of claim 11, wherein the composite material has a flexural strength of at least 6,000 psi.
    [15" claim-type="Currently amended] The composite material of claim 11, wherein the composite material has a flexural strength of at least 10,000 psi.
    [16" claim-type="Currently amended] Cutting cellulose or lignocellulosic fibers to form textured cellulose or lignocellulosic fibers;
    And then combining the textured cellulose or lignocellulosic fibers with a resin.
    [17" claim-type="Currently amended] The method for producing a composite material as defined in claim 16, wherein the resin is a thermoplastic resin.
    [18" claim-type="Currently amended] 18. The method according to claim 17, comprising using a rotary blade cutter in the step of cutting said cellulose or lignocellulosic fibers.
    [19" claim-type="Currently amended] Cutting cellulose or lignocellulosic fibers; A method of producing a composite material comprising the step of bonding the cut cellulose or lignocellulosic fibers with a resin.
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    同族专利:
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    AU1122299A|1999-05-24|
    TWI274764B|2007-03-01|
    JP2001521958A|2001-11-13|
    IL135617D0|2001-05-20|
    PL340283A1|2001-01-29|
    AP200001791A0|2000-06-30|
    EA200000479A1|2000-10-30|
    EE200000262A|2001-06-15|
    YU24800A|2002-09-19|
    NO20002163L|2000-04-27|
    TW579384B|2004-03-11|
    CN1252148C|2006-04-19|
    HRP20000227A2|2001-04-30|
    AU748732B2|2002-06-13|
    GR20010300058T1|2001-10-31|
    PL195294B1|2007-08-31|
    OA11404A|2004-04-12|
    HU0004135A3|2001-11-28|
    CN1276810A|2000-12-13|
    CA2307574C|2007-09-04|
    TR200001183T2|2001-03-21|
    WO1999023138A1|1999-05-14|
    US6207729B1|2001-03-27|
    ES2163383T1|2002-02-01|
    TW200400219A|2004-01-01|
    GEP20022682B|2001-12-10|
    DE1025143T1|2002-01-17|
    BR9813154B1|2009-01-13|
    US6258876B1|2001-07-10|
    SK5652000A3|2000-11-07|
    BG104446A|2000-12-29|
    EP1025143A4|2001-01-31|
    MXPA00004220A|2002-04-10|
    US5973035A|1999-10-26|
    BR9813154A|2000-08-15|
    ID24951A|2000-08-31|
    IL135617A|2005-05-17|
    NZ504774A|2003-05-30|
    CA2307574A1|1999-05-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1997-10-31|Priority to US8/961,863
    1997-10-31|Priority to US08/961,863
    1998-10-26|Application filed by 메도프 마샬, 질레코 인코포레이티드
    1998-10-26|Priority to PCT/US1998/022661
    2001-04-16|Publication of KR20010031472A
    优先权:
    申请号 | 申请日 | 专利标题
    US8/961,863|1997-10-31|
    US08/961,863|US5973035A|1997-10-31|1997-10-31|Cellulosic fiber composites|
    PCT/US1998/022661|WO1999023138A1|1997-10-31|1998-10-26|Cellulosic fiber composites|
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