Articles Including High Modulus Fibrous Material

a high modulus, fibrous material technology, applied in the field of textile products, can solve the problems of nonwoven sheet materials exposed to varying temperature conditions, products can suffer various drawbacks, and many products, such as roofing membranes, are subject to stress in all directions of products, so as to improve strength, stability and abrasion resistance, and improve the effect of properties

Inactive Publication Date: 2008-09-25
GAMALELDIN MOHAMED WALID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0009]In another aspect of the invention, the composite sheet material includes substantially randomly oriented high modulus fibrous material and a nonwoven web of substantially continuous thermoplastic filaments, such as a nonwoven web of spunbonded filaments. In various embodiments of this aspect of the invention, the composite sheet material can include at least one additional

Problems solved by technology

In addition, in many applications, the nonwoven sheet materials can be exposed to varying temperature conditions during installation and subsequent use.
Such products can, however, suffer various drawbacks.
Further, many products, such as roofing membranes, are subject to stresses in all directions of the product

Method used

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  • Articles Including High Modulus Fibrous Material
  • Articles Including High Modulus Fibrous Material
  • Articles Including High Modulus Fibrous Material

Examples

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example 1

[0049]A nonwoven composite sheet material in accordance with an exemplary embodiment of the present invention can be prepared using a continuous multi-spinning beam process as follows. A nonwoven sheet of polyester fibrous materials can be produced using a continuous filament process such as spunbonding. Thereafter high modulus fibrous materials, such as glass staple fibers or glass cut yarns, are sprayed or otherwise applied onto a surface of the spunbonded polyester web. An additional layer of continuous filament polyester material, such as a second polyester spunbonded web, can thereafter be formed on the exposed surface of the glass fibrous web to form a sandwich structure including outer polyester spunbonded webs and an inner glass fibrous web. The webs can be bonded to form a coherent laminate structure using any suitable bonding technique, including chemical adhesion, thermal bonding, mechanical bonding (such as needling or hydroentanglement), and combinations thereof.

example 2

[0050]A nonwoven composite sheet material in accordance with another exemplary embodiment of the present invention can be prepared as follows. A nonwoven sheet of polyester staple fibers can be produced using a carding process. High modulus fibrous materials, such as glass staple fibers or glass cut yarns, are sprayed or otherwise applied onto a surface of a lower (inferior) crosslapper and prior to this lower web being combined with a web of polyester staple fibers being formed by an upper (superior) crosslapper, to form a composite sheet material including outer layers of polyester staple fibers sandwiching an inner layer of glass staple fibers. The webs can be bonded to form a coherent laminate structure using any suitable bonding technique, including chemical adhesion, thermal bonding, mechanical bonding (such as needling or hydroentanglement), and combinations thereof.

example 3

[0051]A nonwoven composite sheet material in accordance with yet another exemplary embodiment of the present invention can be prepared as follows. High modulus fibers, such as glass fibers, can be commingled with thermoplastic fibers, such as polyester fibers, in a mixing device and the commingled fibers thereafter laid on a web forming belt. The web of commingled polyester and glass fibers can be bonded to form a coherent laminate structure using any suitable bonding technique, including chemical adhesion, thermal bonding, mechanical bonding (such as needling or hydroentanglement), and combinations thereof.

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Abstract

A composite sheet material including substantially randomly oriented high modulus fibrous material and a nonwoven web of thermoplastic fibrous material is disclosed. The composite sheet material can further include a substantially fluid impervious layer. The resultant composite sheet material can exhibit isotropic physical properties. The isotropic nature of the product can in turn improve the dimensional stability of the product, which can be useful for applications subject to multidirectional stresses, such as roofing membranes exposed to temperature variances.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to textile products useful as supporting substrates.[0002]Synthetic nonwoven sheet materials have been used as components in a wide variety of products, including supporting substrates for roofing membranes, floor coverings, and the like. Many applications require a supporting substrate that exhibits good mechanical properties. In addition, in many applications, the nonwoven sheet materials can be exposed to varying temperature conditions during installation and subsequent use. Accordingly, such applications can require a substrate having good dimensional stability to minimize distortion of the product.[0003]U.S. Pat. No. 5,118,550 to Baravian et al. is directed to a substrate stated to exhibit good dimensional stability, even under conditions of production and subsequent treatments and use, such as bituminous impregnation. The substrate can include a synthetic nonwoven material in combination with high modulus threads a...

Claims

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Application Information

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IPC IPC(8): D04H1/00D04H3/00D04H5/00
CPCB32B5/26B32B11/10E04D5/10D04H13/002B32B27/12D04H1/4209D04H1/4374D04H1/498D04H1/593D04H3/14Y10T442/60Y10T442/681
Inventor GAMALELDIN, MOHAMED WALID
Owner GAMALELDIN MOHAMED WALID
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