Non-peelabel insole and manufacturing method

Abstract

An insole of the present invention includes a first layer, and a second layer integrally and continuously formed with the first layer. The second layer is mold-injected on the first layer to bond the second layer with the first layer, so as to form the stable bonding therebetween for securely and integrally bonding the first and second layers in a glue-less manner.

Description

BACKGROUND OF THE PRESENT INVENTION[0001]1. Field of Invention[0002]The present invention relates to an insole of a shoe, and more particularly to a non-peelable insole, wherein the non-peelable insole has a first layer integrally and continuously formed with a second layer, such that the first and second layer are firmly attached with each other to form the non-peelable insole.[0003]2. Description of Related Arts[0004]Most of the shoes have an insole, which normally has an upper layer and a lower layer attached to the upper layer by glue, and the lower layer may be provided as a cushion layer for enhancing the comfortableness when the user is wearing the shoe, while the upper layer may provide a smoothie surface for being directly contacted with the user's feet, so as to provide different designed graphics thereon within the shoe cavity for replacing on the bottom shoe sole. The China Patent application, which has an application number of 200410026765, has published a process of ma...

AI Technical Summary

Benefits of technology

The present invention provides an improved insole and a method of making it. The insole has a first layer and a second layer integrally formed with each other through a mold injection process. This eliminates the need for glue and simplifies the manufacturing process. The insole is non-peelable, meaning it is durable and not easily separated from other layers. The method also reduces waste of material and manufacturing costs. The invention provides an eco-friendly solution for integrating the first and second layers. The second layer is formed without the need for expensive or complicated structures. The method also eliminates the need for a trimming process and simplifies the alignment of the first and second layers. The invention provides a better appearance, with no glue seam between the layers. The method also allows for the use of other materials for the first layer, expanding the product's expansion ability.

Problems solved by technology

Firstly, the process of separately forming, tailoring, and gluing the two layers, such as the PU layer and PVC layer, requires a great amount of work by human, so that it is time consuming and inefficient.

Secondly, some traditional process of making insole glues the two layer of the insole before tailoring the two layers thereof, so that the efficiency of the process is slightly increased. However, the pre-glued two layers of insole require a large amount of glue, which is material waste and rising another the environmental issue of the pollutant of glue. Further more, the large gluing surface between the two layers is hard to control the amount of the glue, so as to reduce the quality of the insole.

Third, the sheets of first and second layers are trimmed or cut to a predetermined shape for fittedly accommodated within the bottom sole of the shoe, so that only the cut parts of the cut sheets are used for making the insole. The other non-cut parts of the cut sheets are wasted.

Fourth, in order to align the cut sheets of the first and second layers for being bonding therewith via glue, a predetermined accuracy of the aligning step for attaching the cut sheets of first layer to the second layer is required for the perfect looking of the insole. The amount of glue is hard to evenly apply thereon, so that partial of the first and second layers are insecurely attached with each other, so as to reduce the quality of insole.

Fifth, the manually glued first and second layers are easily detached apart from each other during the washing or cleaning process of the insole, so as to decrease the life time of the insole.

Sixth, the glue used in the process usually has the property of volatile, so that the toxicity of the glue may be easily evaporated in the air, so as to harm the health and pollute the environment.

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