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Textile core having continuous glass fibers

A continuous glass and fiber technology used in the field of fabric cores

Inactive Publication Date: 2012-05-30
吉尔伯特·肖马拉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The problem addressed by the present invention is to significantly increase the mechanical strength of composite articles produced with fiber-based molded reinforcements while maintaining the cohesion (compactness, cohesion, coherence) exhibited by the molded reinforcement before molding. stability, consistency, cohérence), flexibility and deformability, and to ensure that the molded reinforcement maintains a satisfactory volume and maintains good properties related to the penetration and imprint of the resin when moulding.

Method used

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  • Textile core having continuous glass fibers
  • Textile core having continuous glass fibers
  • Textile core having continuous glass fibers

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0089] I) Form a first web of chemical fibers with a hot-melt surface on a conventional card. A portion of the chemical fibers are made from bicomponent fibers having a polyester central core and a heat-melt sheath made of copolyester. A hot melt sheath made of copolyester has a melting point of about 110°C.

[0090] Bicomponent manmade fibers have a single count between about 2 denier and about 4 denier.

[0091] II) A second web of chemical fibers having a hot-melt surface similar to the first web is formed on a conventional carding machine.

[0092] III) One or more expanded rovings of continuous glass strands are placed on a first web of fibers with a hot-melt surface so that they are all randomly oriented in several thicknesses. The continuous glass strand was formed from an assembly of 40 filaments with a single diameter of about 15 μm, the strand having a unit count of about 50 tex.

[0093] IV) Place the second mesh on the opposite side of the inner layer 2.

[0094]...

example 2

[0100] The molded reinforcement is produced using the same steps as in Example 1 above, with the only difference that in step III) on the first web of fibers with a hot-melt surface is placed glass 20 cm long and 50 tex Strand Section - Each glass strand was formed of 40 filaments with a unit diameter of about 15 μm, the same number as in Example 1 in order to obtain the same grammage.

[0101] At the completion of this step, the thickness of the layer of glass strands was found to be about 10 to 15 cm (before needling). This thickness is compared to a thickness of 3 or 4 cm obtained by interweaving portions of glass strands of the same diameter but 5 cm long. This demonstrates the elasticity and breathability provided by the glass strands when the length of the glass strands exceeds about 20 cm.

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Abstract

The core according to the invention comprises a thick, well-ventilated inner layer (2) made of fragmented slivers of continuous glass fibers (2a), the inner layer (2) being covered with two outer layers (3, 4) that consist of fiber segments having a hot-melt surface. The assembly is secured by penetrating fiber segments (3b, 4b) having a hot-melt surface, said segments penetrating, along part of the length thereof, into the inner layer (2) and adhering to the continuous glass fibers (2a).

Description

technical field [0001] The present invention relates to a cohesive and flexible fabric core (skeleton) for use as a reinforcement product for composite articles - ie for resin (polyester or other resin) based articles reinforced by reinforcing fibres. Background technique [0002] A number of coherent textile core reinforcement structures made of one or more layers of fibers joined together are known. The fabric core is usually in the form of a flexible laid yarn packaged in spools, which can thus be transported and processed at the point where it is used to produce the composite product. [0003] To produce a composite article, the process is generally as follows: A piece of fabric core of suitable surface area is cut out and placed in a mold, then resin is introduced into the mold to surround the fabric core. After polymerization, the resin and insert form a mechanically strong structure. [0004] Mechanical strength properties are obtained only if the resin penetrates s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H13/00B29C70/08B32B5/26B29C70/24B32B17/02
CPCD04H3/105B29B11/16D04H3/004D04H5/06B32B17/067D04H5/02B32B5/26D04H3/147D04H1/541B32B17/02D04H13/00D04H5/12B32B5/02B32B5/022B32B5/08B32B5/22B32B2250/20B32B2262/0223B32B2262/0253B32B2262/0261B32B2262/0276B32B2262/101B32B2262/12B32B2307/50B32B2307/51B32B2307/718B32B2307/726Y10T442/609Y10T442/191Y10T442/669Y10T442/608D04H1/5412D04H1/485D04H1/498D04H1/559D04H1/4218
Inventor 吉尔伯特·肖马拉
Owner 吉尔伯特·肖马拉