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
  • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
  • D04H1/4209—Inorganic fibres
• • 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
  • D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
  • D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres

Definitions

• the invention relates to a method for producing needle felt from rock wool, according to the preamble of claim 1.
• rock wool when subjected to a needling process, shows no appreciable improvement in fiber cohesion. It cannot therefore be consolidated as a needle felt by a needling process, so that the required consolidation in practice takes place either through a hardening binder if the felt is required as a more or less rigid plate, or through mechanical means, for example in the form of so-called wire mats , wherein the rock wool felt is quilted by means of a metal wire or the like. While the use of a hardening binder limits the possible use of the rock wool sheet thus formed due to its rigidity and due to the introduction of a non-heat-resistant organic binder, wire mats are not suitable for use in a corrosive environment and the attainable bulk density is limited.
• An aqueous solution or suspension of a non-metal-containing, volatile organic lubricant is proposed as a lubricant, which does not leave any alkaline substances in the needle felt after it has been driven out.
• An aromatic or aliphatic polyglycol ether, fatty acid derivatives such as fatty acid ethanolamide, silicone oils or nonionic surfactants and alkali metal-free anionic surfactants are proposed as suitable lubricants.
• the invention has for its object to provide a method for producing needle felt from rock wool of the type specified in the preamble of claim 1, which leads to a needle felt consisting exclusively of rock wool without the addition of other fibers.
• rock wool with particularly thin fibers is used, and an agent with an unusually high viscosity for such textile additives is added to these fibers in the sense of a finishing agent.
• Rock wool fibers with a small average fiber thickness of preferably less than 6 ⁇ m can be obtained in the transverse blowing process or in the nozzle blowing process using the teaching of the older German patent application P 38 07 420 and are therefore available.
• Finishing agents with a viscosity of preferably For example, over 2000 cP are also available on the market as mineral oil-based dust binders.
• the high viscosity of the finish which is preferably added to the rockwool in a proportion by weight of the agent of at least 0.05%, based on the weight of the dry rockwool felt, surprisingly allows the sliding movement of the rockwave if the upper limit of 10,000 cP is not exceeded the fibers caught in the needles in their anchoring position in the needle felt, but after the action of the needles has ended due to the high viscosity keeps the fibers in the position found by the needling process in the needle felt.
• the cohesion between adjacent fibers is improved and is achieved in such a way that the action of the needles is not limited to one thread or very few threads per needle, but rather that the threads directly gripped by the needles have a driving effect on neighboring threads and thus the strength of the needle felt is further improved. Furthermore, this causes the action of the needle to extend to a larger surrounding area of the respective needle, with the result that the entire rock wool web is compacted considerably, for example in multiples, despite the only selective action of the needles, and with a comparatively high bulk density like a thick textile cloth similar to a woolen blanket good strength and manageability as well as the best possible formability.
• the finishing agent should remain in the needle felt, especially if its dust-binding effect is to be used for the further handling of the needle felt.
• the needle felt formed in this way is sufficiently stable for further processing and at most has very little springback.
• the Renault test is based on a Renault method.
• a sample, format 90 mm x 90 mm, basis weight 5.0 kg / m2 for loose wool and 3.0 kg / m2 for bound material is clamped in a device between perforated plates and pressed together to a thickness of 15 mm.
• the sample is then pierced with a stamp of 30 mm in diameter and a test speed of 10 mm / min, the axis of which is aligned with the axis of the two openings in the plates.
• the lower opening has a circular shape and a diameter of 40 ⁇ m in the example, so that there is a gap between the outer circumference of the stamp and the edge of the lower, supporting opening of 5 mm width.
• the maximum puncture force is measured.
• the needled felt web soon after it is needled with a heat treatment at a temperature temperature between about 300 ° C and 500 ° C is de-energized.
• the heat treatment is preferably carried out under pressure loading of the needle felt, in order to avoid a change in the shape of the fibers due to the remaining resilience when the finishing agent is driven out before the tension is released in the rock wool fibers.
• pressure loading of the needle felt in order to avoid a change in the shape of the fibers due to the remaining resilience when the finishing agent is driven out before the tension is released in the rock wool fibers.
• the needle felt web can be treated with a conventional dust-binding agent in order to minimize dust accumulation during further handling.
• Claims 7 to 9 give particularly preferred Aviva average.
• a softening agent according to claim 8 is available on the market under the name "preparol”, and one according to claim 9 is available under the name “compressol”. These agents have a viscosity between 5,000 cP and 7,000 cP, while other dust-binding agents, sizes or similar substances used in the textile industry have a viscosity of only a few hundred cP.
• "Preparol” or “compressol” are emulsified in water, and this elmusion with a water content of about 90% can be sprayed onto the fibers in the chute below the fiberizing unit and thus introduced evenly distributed. Excellent results have been obtained using these softening agents in an amount of 0.02 to 0.8 percent by weight, based on the dry weight of the rock wool web.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Mechanical Engineering (AREA)
• Nonwoven Fabrics (AREA)
• Paper (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Stringed Musical Instruments (AREA)
• Artificial Filaments (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (3)

Family

ID=6365110

Family Applications (1)

Country Status (10)

Cited By (5)

Families Citing this family (9)

Family Cites Families (11)

• 1988
  • 1988-10-13 DE DE3835007A patent/DE3835007A1/de not_active Withdrawn
• 1989
  • 1989-09-21 DK DK465389A patent/DK465389A/da not_active Application Discontinuation
  • 1989-09-22 EP EP89117542A patent/EP0363707B1/fr not_active Expired - Lifetime
  • 1989-09-22 DE DE8989117542T patent/DE58905136D1/de not_active Expired - Fee Related
  • 1989-09-22 AT AT89117542T patent/ATE92548T1/de not_active IP Right Cessation
  • 1989-09-22 ES ES89117542T patent/ES2044004T3/es not_active Expired - Lifetime
  • 1989-09-25 YU YU184689A patent/YU46492B/sh unknown
  • 1989-09-26 US US07/416,228 patent/US5057173A/en not_active Expired - Fee Related
  • 1989-10-12 JP JP1264130A patent/JPH02153852A/ja active Pending
  • 1989-10-13 FI FI894871A patent/FI94966B/fi not_active IP Right Cessation
  • 1989-10-13 ZA ZA897769A patent/ZA897769B/xx unknown

Also Published As

Similar Documents

Legal Events