Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B30—PRESSES
  • B30B—PRESSES IN GENERAL
  • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
  • B30B15/06—Platens or press rams
  • B30B15/061—Cushion plates
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
  • D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
  • D03D15/52—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads thermal insulating, e.g. heating or cooling
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
  • D02G3/443—Heat-resistant, fireproof or flame-retardant yarns or threads
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
  • D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
  • D03D15/513—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads heat-resistant or fireproof

Definitions

• the invention relates to a press pad consisting of a Textile yarn.
• Such press pads are used for high and low pressure presses of all kinds, for example short-cycle presses or Stack presses for coating chipboard, MDF, HDF boards with family of aminoplast resin films Thermosets used, the high pressure presses in particular serve for the production of high pressure laminates.
• Such Press pads are still used in presses for coating of various types of carrier material with wooden veneer, Foils or other materials used for surface treatment.
• the known press pads used for this purpose are exposed to high mechanical stress, in particular at high press pressures, which results in a relatively short service life.
• the mechanical stresses on the press pads are so high in the manufacturing conditions of plastic flooring that a shortened service life must be expected.
• the known press pads which consist of yarn made of aromatic polyamide and metal threads, do not do justice to such a high mechanical stress (DE 91 15 681.5 U1).
• the present invention is therefore based on the object propose a press pad with a fabric made of a textile yarn, which is characterized by an extended period of use excels even under high mechanical stress.
• the properties normally required from the press pad should not be reduced, but rather encouraged , namely the cushioning effect and good heat transfer.
• the textile yarn includes flame retardant melamine resin fiber.
• the yarn material used consists specifically of melamine resin staple fibers, a condensation product of melamine with aqueous Formaldehyde solution.
• melamine-formaldehyde resin fibers abbreviated MF fibers, and modified MF fibers understood.
• MF fibers have the special Property on that they are flame retardant.
• the melamine resin fibers are considered flame retardant and good heat-insulating fibers especially in fabrics and nonwovens for fire protection clothing, friction linings and cable sheathing used such.
• the inventors of the present application determined that that the MF fibers have the above properties required for press pads promote and in particular through a favorable residency according to pressure load, a property which was previously neither recognized nor exploited and which Surprisingly makes MF fibers suitable for press pads, which has an extended lifespan even with the above show high mechanical stresses.
• the textile yarn made of flame retardant thermoset fiber with the same or similar properties as melamine resin fiber or melamine formaldehyde resin fibers, abbreviated MF fiber and modified MF fiber, include.
• the flame-retardant thermosetting fiber can according to claim 9 consist of urea-formaldehyde or according to claim 10 Phenol formaldehyde condensate.
• the use of phenol fibers generally alongside e.g. Armamide fibers are from EP 04 88 071 A2 removable.
• the 3- to 6-layer fabric described there but is impregnated with temperature-resistant resins, which are then hardened to form special press pads to produce, which are suitable for a hot press, in which decorative high pressure laminates or high pressure laminates for printed electronic circuits are manufactured.
• Liquid resins i.a.
• Liquid resins and fibers are fundamentally different materials. Also fiber fleeces are basically to be distinguished from fabrics, that have other properties.
• thermosets used according to the invention as fibers, including the MF fiber and modified MF fibers belong are characterized in that they have no melting point have and the decomposition point is above 270 ° C. You can therefore at the temperatures that are usually in occur in the coating presses mentioned above, not soften more. That is why the press pads stand out from the above fibers and yarns with their various combinations were made, such as Tests were found by taking the time under Maintaining the good cushioning effect extended considerably is.
• MF fibers and modified MF fibers as well as flame retardant thermosetting fibers with the same or Similar properties include that they are known Solvents are insoluble.
• the flame retardant provided according to the invention MF fibers and modified MF fibers as well as thermosets with the same or similar properties for manufacturing of the press pad is high surface quality of the manufactured products attainable because the requirement of an even heat transfer from the Heating plate through the press pad to the product also in the long term given is.
• the heat transfer of the press pads be further improved in that the Gebebe according to claim Contains 5 metal threads.
• the metal content can vary depending on the purpose, between 0 and 98% by weight of the total weight of the press cushion. So that can adapt the heat transfer to the respective requirements.
• the metal threads according to claim 6 with the textile yarn can be wrapped or alternatively according to claim the textile yarn must be wrapped with the metal threads.
• the metal threads are like this arranged that they have good heat transfer between the result in two surfaces of the press cushion, one each of the two surfaces on the heating plate directly or indirectly is present.
• each metal thread forms a multitude of points of contact both on the top and on the bottom of the press pad, being a good thermally conductive connection between the points of contact exist.
• the metal threads with which the textile yarn in particular is wound can be monofilament or multifilament.
• the press pad according to claim 8 pure Metal thread included.
• Fibers can optimally press the press pad on the intended special purpose.
• a press cushioning fabric was used manufactured in that melamine resin fiber of the type BASOFIL was wrapped with copper yarn and woven.
• a first variant of this embodiment existed the weft thread made of basofil fibers to 450 tex spun yarn, that was wrapped with 6 individual copper threads.
• the warp thread also consisted of basofil fiber to 450 tex spun Yarn wrapped with 6 individual copper threads.
• the weft consisted of the previous ones mentioned materials, although alternating one pure metal thread was processed in a fabric version consisted of a copper braid.
• the basofil fiber used had a slight crimp effect on, which is advantageous for the resilience of the Fiber and the fabric made from it. This made the press pad's ability to move after each Press process to recover or reset, increased even more.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Woven Fabrics (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8031887

Family Applications (1)

Country Status (2)

Cited By (2)

Families Citing this family (2)

Citations (8)

Family Cites Families (4)

• 1996
  • 1996-11-13 DE DE29619737U patent/DE29619737U1/de not_active Expired - Lifetime
• 1997
  • 1997-11-05 EP EP97119318A patent/EP0842764A1/fr not_active Ceased

Patent Citations (8)

Non-Patent Citations (1)

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