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Method for increasing sponginess property of sheet with thermoplastic reinforced by multiporous fiber

A porous fiber, thermoplastic technology, applied in the field of thermoplastic polymer sheet, can solve the problem of product strength and toughness decline

Inactive Publication Date: 2007-11-21
阿兹代尔公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the reduction in thickness also generally produces a reduction in product strength and toughness

Method used

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  • Method for increasing sponginess property of sheet with thermoplastic reinforced by multiporous fiber
  • Method for increasing sponginess property of sheet with thermoplastic reinforced by multiporous fiber
  • Method for increasing sponginess property of sheet with thermoplastic reinforced by multiporous fiber

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Embodiment Construction

[0009] A method of manufacturing a porous fiber-reinforced thermoplastic sheet with increased bulk properties will be described in detail below. The method includes orienting a portion of the reinforcing fibers, at least about 5% by weight of the reinforcing fibers, in a z-axis. The x-y plane includes the width and length of the sheet, while the z-axis direction includes the thickness of the sheet. Increasing the number of reinforcing fibers in the z-axis direction results in increased bulk, or expansion of the sheet, in forming a greater thickness than known thermoplastic sheets with the same reinforcing fiber loading.

[0010] Referring to the drawings, FIG. 1 is a schematic cross-sectional view of an exemplary composite thermoplastic sheet 10 including a porous core 12 having a first surface 14 and a second surface 16 . In some alternative embodiments, the skin and / or barrier layer 18 is bonded to the first surface 14 and / or the second surface 16 .

[0011] A web forming ...

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Abstract

A method of fabricating a porous, fiber-reinforced thermoplastic sheet having increased lofting properties is provided. The method includes adding reinforcing fibers having an average length of about 5 mm to about 50 mm, and thermoplastic resin powder particles to an agitated aqueous foam to form a dispersed mixture, laying the dispersed mixture of reinforcing fibers and thermoplastic resin particles down onto a support structure, evacuating the water to form a web, generating a z-axis orientation of a portion of the reinforcing fibers, heating the web above the glass transition temperature of the thermoplastic resin, and pressing the web to a predetermined thickness to form a porous thermoplastic composite sheet having a void content of about 1 percent to about 95 percent.

Description

technical field [0001] The present invention relates generally to porous fiber-reinforced thermoplastic polymer sheets, and more particularly to porous fiber-reinforced thermoplastic polymers having increased bulk properties compared to known porous fiber-reinforced thermoplastic polymer sheets Sheet. Background technique [0002] Porous fiber reinforced thermoplastic sheets are disclosed in US Patent Nos. 4,978,489 and 4,670,331 and are used in many and various applications in the product manufacturing industry due to the ease of molding fiber reinforced thermoplastic sheets into articles. Known techniques such as hot stamping, compression molding, and thermoforming have been successfully used to form articles from fiber-reinforced thermoplastic sheets. [0003] In some industries, such as the automotive industry, there is a need for products formed from porous fiber-reinforced thermoplastic sheets having a lower basis weight than known products. One way to achieve this i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/56B29C70/54B29C70/10C08J5/04C08L23/00C08L25/06C08L67/00C08L27/06C08L71/00C08L69/00C08L77/00
CPCB29C70/12B29C70/46B29C70/24D04H1/642D04H1/641Y10T428/249924D04H1/60B29D7/01
Inventor C·A·哈珀C·W·彼得森V·拉盖文德兰
Owner 阿兹代尔公司
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