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Stiffeners for use in footwear

A technology of products and footwear, applied in the direction of footwear, footwear, soles, etc., can solve problems such as high weight and high cost

Active Publication Date: 2006-01-04
STANBEE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in higher cost and higher weight

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The copolyester is a PETG copolyester, specifically Eastman Chemical's Eastar 6763, and the binder is polycaprolactone, specifically Tone 767. These two materials have significantly different properties, but can be processed into a homogeneous phase by passing them through a READCO continuous mixer (READCO Company, York, PA.) in the temperature range of 380-400°F. The device does not require materials in powder form, and materials different from each other can be used to form a homogeneous melt, which is used to form a sheet with toughness, rigidity, and adhesive activity. Separately, 40 parts of Tone 767 and 60 parts of PETG copolyester were added to a 2-inch READCO continuous mixer set at 375°F and a slot die temperature of 425°F. The feed rate is 60 lbs / hr and the screw speed is 150 rpm. The resulting sheet was passed through a set of cooling rolls to obtain a sheet with a thickness of 40-43 mils.

Embodiment 2

[0022] This example has the same conditions as Example 1, except that 50 parts of Tone and 50 parts of PETG are added to the mixer to produce a sheet of the same thickness.

Embodiment 3

[0024] This example has the same conditions as Example 1, except that 60 parts of Tone and 40 parts of PETG are used to produce sheets with a thickness in the range of 40-43 mils.

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PUM

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Abstract

The present invention relates to a process and composition for stiffening materials for use in the manufacturing of footwear using a combination of stiffeners and adhesives.

Description

[0001] This application claims the priority of U.S. Provisional Patent Application No. 60 / 584,519 filed on July 1, 2004 and U.S. Provisional Patent Application No. 60 / 640,947 filed on December 31, 2004. Technical field [0002] The present invention relates to a stiffener, such as a stiffener used to maintain the shape of the heel and toe portions of footwear products during shoe manufacturing. Background technique [0003] A large number of different types of reinforcement are used in the shoe industry. US Patent Nos. 3,523,103, 3,590,411, 3,647,616, 3,891,785, 3,973,285, 4,814,037, 6,391,380 and 6,475,619 disclose methods and materials for improving the hardness and adhesion of materials used in the shoe industry (all the above patents are incorporated herein by reference). The hardened plastic resin is selected from styrene butadiene, polystyrene, polyvinyl acetate, acrylic, and other polymer lattices that can be immersed in needle-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A43B13/04B29C70/00B29D31/508B29K701/00B29D35/06
Inventor 布鲁斯·戈德堡
Owner STANBEE