EP0758413A1 - Bindemittelzusammensetzung zur herstellung von faservliesen - Google Patents
Bindemittelzusammensetzung zur herstellung von faservliesenInfo
- Publication number
- EP0758413A1 EP0758413A1 EP95919367A EP95919367A EP0758413A1 EP 0758413 A1 EP0758413 A1 EP 0758413A1 EP 95919367 A EP95919367 A EP 95919367A EP 95919367 A EP95919367 A EP 95919367A EP 0758413 A1 EP0758413 A1 EP 0758413A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- powder
- mixture
- binder
- powder coating
- molded parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- 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
- D04H1/60—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 dry state, e.g. thermo-activatable agents in solid or molten state, and heat being applied subsequently
Definitions
- nonwovens are widely used in industry. These are nonwovens made of various types of fiber that can be mixed with binders. Pre-products can then be produced from these nonwovens, the so-called prepregs, which are then shaped, hardened and, if necessary, assembled with the appropriate processing tools. It is also possible to produce the corresponding nonwoven fiber nonwoven directly from the fibers and the binder powder.
- These molded parts or planware are used in a wide range. In the automotive industry, these products are used, for example, as molded parts, e.g. used as insulation for bonnets, wheel arches or trunk insulation. Another area of application is the use as planware, e.g.
- molded parts or sheet parts thus equipped with an optically stable and decorative surface coating can then e.g. can be used as door side cladding, as a parcel shelf or as ceiling cladding in the automotive industry.
- the methods for producing nonwoven fabrics or for mixing these nonwovens with binder powder are known.
- the fiber material is homogenized, for example in a fiber mixing chamber, and placed on a conveyor belt as a loose fiber layer.
- the binder mixture is then applied to the fiber material, for example using metering rollers or vibrating troughs.
- the fiber / binder mixture is then swirled in a closed system by means of an air stream and mixed homogeneously.
- the homogeneous mixture of fiber and binder powder is laid down to form a continuous fleece.
- the components of this mixture can either be glued to one another by gentle heating and then cooling, the prepregs being formed, or sheet or roll goods which are already completely hardened are produced.
- the prepregs have not yet been fully cured, but are stable in storage. After processing into the final shape, these prepregs are thermally crosslinked under the influence of heat at up to 210 * C, whereby three-dimensional thermosetting molded parts are obtained.
- An object of the invention is a mixture for the production of molded parts from nonwoven fabrics containing
- Another object of the present invention is the use of powder coating waste for the production of moldings which contain fiber fleece.
- Another object is the use of this varnish waste for binding nonwoven fabrics.
- Powder coatings are increasingly used in the coatings industry. These have the advantage that a solvent-free application process is possible. This can significantly reduce emissions to the environment.
- the application methods for powder coatings have the disadvantage that a significant proportion of the powder is not based on the layering object arrives. These powders are collected in the painting booth as a so-called overspray. Powder size distribution and purity are sensitive. Therefore, this over-spray must be disposed of as waste.
- the crushed paint powder extrudates are ground. Fine dust accumulates during this grinding process, which has a disruptive effect on the painting process. Therefore, this dust is largely removed. This dust is difficult to reprocess and must be disposed of as special waste.
- the fibers that can be used for the various nonwovens are woven, matted or mixed fibers.
- the fibers consist of the known materials, e.g. natural, organic and inorganic fibers. Examples include glass fibers, rock wool fibers, polyester fibers, acrylic resin fibers, polyolefin fibers, wool fibers, cotton fibers, linseed fibers or the like.
- These fibers or the non-woven fabrics made from them are known in industry.
- the processes with which they can be produced are also known. This can be done, for example, by weaving or matting.
- the resulting nonwovens should be essentially dry; they can, if necessary, be impregnated with additives.
- the grain sizes of the powder coating waste used are, for example, in the same range as that of the resins and are preferably between 1 to 300 ⁇ m, particularly preferably between 10 and 60 ⁇ m. If powder coating waste is used whose grain sizes are too small for the desired application, it is possible to obtain larger grain sizes by caking the particles.
- the powder coating waste which can be used in the mixture according to the invention has not yet been crosslinked. They contain reactive groups such as carboxyl groups, epoxy groups, hydroxyl groups, amino groups, amide groups or isocyanate derivatives. These can react with each other when heated.
- the crosslinking temperature depends on its basic structure. They are usually between 120 and 220 * 0. Powder coatings with crosslinking temperatures above 180 * 0 are preferably added only in small amounts in order to achieve the most complete possible crosslinking of the binder used, even at curing temperatures of the moldings of about 160 * 0. In addition, at high crosslinking temperatures, especially when using nonwoven made of synthetic There is a risk that the fibers are broken down, which leads to a lowering of the stability of the molded part. It is preferred that the coating powder / crosslinking temperatures are below 160 * 0.
- binder powders are described, for example, in ST Harris, "The Technology of Powder Coatings", 1976 or in DA Brelie, "The Science of Powder Coatings” Vol I, 1990.
- Colorless or pigmented powder coatings can be used, the customary known inorganic or organic color pigments being possible as pigments. It is also possible for effect pigments, for example metallic pigments, to be incorporated into the powders.
- Color separation is not necessary.
- the grain fineness of the powder is not essential, it should only be ensured that an average sample of the various powder residues is generally used for the preparation of the binder mixture. This leads to better mixing behavior and to a more constant production of the binder mixture.
- any individual powder coating can be used.
- a mixture of epoxy powders and polyester powder is present as a 2 ).
- Up to 60% by weight of a 2 preferably up to 30%, can optionally be replaced by polyurethane powder and / or polyacrylate powder. It is possible to directly produce a mixture a 2 ) within the desired weight ratios and thus to store it.
- Another possible method of operation is that the various powder coating components are stored separately according to the chemical types described above and are only mixed with the phenolic resins later before further processing. Within these chemical types, the resulting materials are mixed homogeneously, ie a sample mixed in the grain size distribution composition and pigmentation is formed. The amounts required in each case are then mixed together from the mixtures of the powder coating binders obtained in this way during the preparation of the binder powders a). If necessary, it is possible to introduce further additional crosslinkers into the binder mixture.
- Flame retardant substances can also be introduced. These are the usual known substances that are contained in fire protection coatings. Examples of such compounds are borates such as sodium borate; Phosphates such as ammonium phosphate or sodium phosphate; Aluminum hydroxides or oxides; further suitable compounds are, for example, heavy metal-containing compounds such as tin oxide compounds or perbroated or perchlorinated compounds such as tetrabromophenol. However, heavy metal-free and halogen-free flame retardant substances should preferably be used. These flame retardant substances are available as a powder. They can be introduced via a separate master batch or they are metered in via the binder powders a.) Or a 2 ) in each case as a homogeneous mixture with the powder component.
- borates such as sodium borate
- Phosphates such as ammonium phosphate or sodium phosphate
- Aluminum hydroxides or oxides further suitable compounds are, for example, heavy metal-containing compounds such as tin oxide compounds or perbroated or perchlor
- Pigments can also be introduced into the binder mixture a). In general, however, it is preferred not to introduce any additional pigments, but only to use the fibrous fillers of the nonwoven or the pigments contained in the powder coatings a 2 ).
- the present invention further relates to molded parts which can be produced by molding and partially or completely curing the mixture of fibers and binder described above. If the mixtures of fibers and binder are only partially cured, the so-called prepregs are obtained, which can then be brought into their final shape by heating in a further processing step and can be fully cured. If the mixture is to be fully cured, it is molded into the appropriate shape in a manner known per se and cured at the crosslinking temperatures suitable for the particular binder mixture.
- the prepreg or the finished molded part formed before curing generally contains 55 to 80% by weight of fibers and 20 to 45% by weight of the binder mixture.
- the binder mixture consists of 45 to 70% by weight of phenolic resins and 30 to 55% by weight of powder coating binder.
- the additives and additives described above can be contained in an amount of up to 20% by weight, preferably up to 15% by weight, the sum of the individual components giving 100% by weight.
- Any powder coating waste can be used. Only one type of powder coating or a mixture of several can be used, but a mixture of polyester and epoxy resins is preferred. It is further preferred that the ratio of polyester powder to epoxy powder is 0.2: 1 to 7: 1, preferably 0.8: 1 to 3: 1. When selecting powder coating waste, care should be taken to ensure that it has a sufficient number of reactive groups.
- the binder mixture a), the prepregs and also the hardened moldings have a reduced proportion of free phenols or formaldehyde. This reduces the risks posed by these harmful substances.
- the molded parts according to the invention can then be produced from the prepregs obtained in this way. This takes place according to known methods such as, for example, shaping and / or laminating, making up the prepregs. After the prepregs have been brought into a suitable shape, they are cross-linked by applying pressure and heat. Crosslinking takes place at temperatures from 140 to 200 * C. The time can be between 10 and 500 seconds, preferably less than 120 seconds. It is selected depending on the phenolic resin a) used.
- the binder powder melts and flows, whereby the fibers are at least partially embedded and chemical crosslinking of the resins takes place. This creates a hardened thermoset material.
- the moldings may contain parts of voids.
- the density of the molded parts can be between 50 to 1000 kg / m 3 . It depends on the amount and type of fibers and binders.
- the moldings formed have ver ⁇ various advantages, such as good thermal insulation, dimensional stability up to 130 * C, good sound insulation, good flexural strength, are physiologically acceptable and have a moisture-regulating, can easily be processed know ⁇ .
- Short fibers are brought onto the surface essentially perpendicularly by means of adhesives, which then produce a dense and soft surface. Flocking methods are also known.
- the molded parts produced from the compositions according to the invention can optionally be painted. All known coating agents known in the industry can be used. After heating, smooth, shiny coatings are created.
- the molded parts obtained in this way can be used in various industrial areas.
- they can be used in the automotive industry, e.g. as interior trim parts for automotive interiors or sound and heat protection parts.
- the binder mixtures can be used as resins in coatings for clutches. These resins can also be used for mold construction in the foundry industry.
- the resulting molded parts are extremely stable and can be shaped in a variety of ways. Through the addition of various additives or through the surface coating, it is possible to use them in different fields of application.
- the mixture has a long shelf life.
- Filter dusts from the manufacture of the powder coatings are used as polyester powder or epoxy powder. These are homogenized and then an average sample of these fractions is used in the examples.
- Prepregs are produced from the powders of Examples 1 to 3 using a nonwoven fabric produced in a known manner and containing over 80% cotton fibers.
- the nonwovens are mixed homogeneously with the binder powder by mechanical movement and passed through a heating channel (approx. 2 to 3 minutes, 80 ° C. to 10 ° C.). This results in prepregs in which resin and fiber are stable connected with each other.
- the prepregs can be made differently according to size and resin / fiber content.
- the bulk density is between 25 and 75 kg / m 3, depending on the application.
- Molded parts are produced from these prepregs.
- the Pre ⁇ pregs are cut, placed in a press in the intended shape and cured therein 100 seconds to 110 seconds at temperatures of between 140 * C and 160 * C. After curing, thermosetting products are formed which retain their shape under heat.
- the density can be influenced via the amount of the prepreg or via the set pressure.
- the resulting crosslinked molded parts can be flocked in a known manner or they are laminated with foils.
- the molded parts obtained in this way have an optically homogeneous surface, they are dimensionally stable and have only a low content of free phenol or formaldehyde.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Laminated Bodies (AREA)
- Reinforced Plastic Materials (AREA)
- Paints Or Removers (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Ceramic Products (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Processing Of Solid Wastes (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Glass Compositions (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4415470 | 1994-05-03 | ||
DE4415470 | 1994-05-03 | ||
PCT/EP1995/001643 WO1995030034A1 (de) | 1994-05-03 | 1995-04-29 | Bindemittelzusammensetzung zur herstellung von faservliesen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0758413A1 true EP0758413A1 (de) | 1997-02-19 |
EP0758413B1 EP0758413B1 (de) | 1999-04-14 |
EP0758413B2 EP0758413B2 (de) | 2002-03-13 |
Family
ID=6517107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95919367A Expired - Lifetime EP0758413B2 (de) | 1994-05-03 | 1995-04-29 | Bindemittelzusammensetzung zur herstellung von faservliesen |
Country Status (10)
Country | Link |
---|---|
US (1) | US5852102A (de) |
EP (1) | EP0758413B2 (de) |
JP (1) | JPH09512575A (de) |
AT (1) | ATE178957T1 (de) |
AU (1) | AU2523495A (de) |
CZ (1) | CZ290886B6 (de) |
DE (1) | DE59505660D1 (de) |
ES (1) | ES2133770T5 (de) |
WO (1) | WO1995030034A1 (de) |
ZA (1) | ZA953558B (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4441765A1 (de) * | 1994-11-24 | 1996-05-30 | Teodur Nv | Bindemittelzusammensetzung zur Herstellung von Faservliesen und Verfahren zur Herstellung von Faservlies-Formteilen |
AU2002300833B2 (en) * | 1997-08-04 | 2007-05-17 | Boehringer Ingelheim Pharma Gmbh & Co. Kg | Aqueous aerosol preparations containing biologically active macromolecules and method for producing the corresponding aerosols |
KR100377270B1 (ko) * | 2000-02-25 | 2003-03-26 | 노동욱 | 재생플라스틱 제조방법 |
DE10112620A1 (de) * | 2001-03-14 | 2002-09-19 | Bakelite Ag | Bindemittelmischungen und ihre Verwendung |
US8012889B2 (en) | 2001-11-07 | 2011-09-06 | Flexform Technologies, Llc | Fire retardant panel composition and methods of making the same |
US7906176B2 (en) * | 2004-12-17 | 2011-03-15 | Flexform Technologies, Llc | Methods of manufacturing a fire retardant structural board |
WO2008020768A1 (en) * | 2006-08-15 | 2008-02-21 | Orica New Zealand Limited | Composite material manufactured from a binder system including waste powder coating powder |
DE102009001806A1 (de) * | 2009-03-24 | 2010-09-30 | Evonik Degussa Gmbh | Prepregs und daraus bei niedriger Temperatur hergestellte Formkörper |
DE102009001793A1 (de) * | 2009-03-24 | 2010-10-07 | Evonik Degussa Gmbh | Prepregs und daraus hergestellte Formkörper |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55148266A (en) * | 1979-05-04 | 1980-11-18 | Nippon Tokushu Toryo Co Ltd | Bulky nonwoven fabric and method |
DE3833656A1 (de) * | 1988-10-04 | 1990-04-12 | Hoechst Ag | Modifizierte novolake |
EP0363539A1 (de) * | 1988-10-14 | 1990-04-18 | MITSUI TOATSU CHEMICALS, Inc. | Wärmehärtbare Harzzusammensetzung zum Spritzgiessen |
US4939188A (en) * | 1988-12-22 | 1990-07-03 | Borden, Inc. | Lithium-containing resole composition for making a shaped refractory article and other hardened articles |
AU1836795A (en) * | 1994-02-02 | 1995-08-21 | Seydel Companies, Inc. | Adhesive compositions from phthalate polymers and the preparation thereof |
-
1995
- 1995-04-29 ES ES95919367T patent/ES2133770T5/es not_active Expired - Lifetime
- 1995-04-29 US US08/737,049 patent/US5852102A/en not_active Expired - Fee Related
- 1995-04-29 AU AU25234/95A patent/AU2523495A/en not_active Abandoned
- 1995-04-29 EP EP95919367A patent/EP0758413B2/de not_active Expired - Lifetime
- 1995-04-29 DE DE59505660T patent/DE59505660D1/de not_active Expired - Lifetime
- 1995-04-29 JP JP7528010A patent/JPH09512575A/ja active Pending
- 1995-04-29 WO PCT/EP1995/001643 patent/WO1995030034A1/de active IP Right Grant
- 1995-04-29 CZ CZ19963194A patent/CZ290886B6/cs not_active IP Right Cessation
- 1995-04-29 AT AT95919367T patent/ATE178957T1/de not_active IP Right Cessation
- 1995-05-03 ZA ZA953558A patent/ZA953558B/xx unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9530034A1 * |
Also Published As
Publication number | Publication date |
---|---|
ZA953558B (en) | 1996-01-11 |
WO1995030034A1 (de) | 1995-11-09 |
CZ290886B6 (cs) | 2002-11-13 |
JPH09512575A (ja) | 1997-12-16 |
ES2133770T3 (es) | 1999-09-16 |
AU2523495A (en) | 1995-11-29 |
ES2133770T5 (es) | 2002-11-01 |
US5852102A (en) | 1998-12-22 |
CZ319496A3 (en) | 1997-03-12 |
EP0758413B2 (de) | 2002-03-13 |
ATE178957T1 (de) | 1999-04-15 |
DE59505660D1 (de) | 1999-05-20 |
EP0758413B1 (de) | 1999-04-14 |
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