Printed Laminated Glass Interlayer for Accurate Bonding Alignment

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Solution Overview

Problem

The production efficiency of laminated glass is low due to difficulties in distinguishing between interlayer films, leading to misalignment and defects in the laminated glass, especially in asymmetric shapes like side glasses.

Innovation Solution

An interlayer film for laminated glass is introduced, featuring a printed part on its surface that serves as a guide for bonding positions to lamination glass members or provides product information, enhancing distinguishability and alignment precision.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If interlayer films with similar outward appearance are used, then cost and visual uniformity are maintained, but it becomes difficult to distinguish between different interlayer films during production, leading to misalignment and defects

Engineering Contradiction:

Improvevisual uniformityVSAvoidalignment precision

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent applies color changes by incorporating a shading region with a different color or transparency than the clear region of the interlayer film. This allows visual distinction between different interlayer films or regions during production while maintaining overall visual uniformity in the final product, as the shading region can be positioned to be invisible or minimally noticeable in the finished laminated glass.

Inventive Principle:

Principle #32Color changes

2Productivity

If the interlayer film lacks visual markers, then appearance quality is maintained, but production efficiency decreases due to difficulty in distinguishing and aligning interlayer films

Engineering Contradiction:

Improveproduction efficiencyVSAvoidinterlayer film structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent uses color changes by creating a shading region with distinct optical properties (different color or transparency) compared to the clear region. This simple visual marker enables rapid identification and alignment during production, improving productivity without adding mechanical complexity to the interlayer film structure.

Inventive Principle:

Principle #32Color changes

3Loss of substance

If trim-cutting is performed without accurate alignment markers, then flexibility in handling interlayer films is maintained, but material waste increases due to excessive trim-cutting

Engineering Contradiction:

Improvetrim-cutting wasteVSAvoidhandling flexibility

Core Design Contradiction:

Loss of substanceVSEase of operation

Solution Approach 1:

The patent applies color changes by incorporating a shading region that serves as a visual guide for alignment. This allows operators to accurately position the interlayer film relative to glass plates, reducing the amount of material that needs to be trimmed away while maintaining ease of operation through clear visual feedback.

Inventive Principle:

Principle #32Color changes

Data Source

PatentUS12304174B2Laminated glass interlayer, roll body, and laminated glass manufacturing method

Publication Date: 2025.05.20 SEKISUI CHEMICAL CO LTD

AI summary

There is provided an interlayer film for laminated glass with which the production efficiency of laminated glass can be enhanced. The interlayer film for laminated glass according to the present invention includes an interlayer film body for lamination glass, and a printed part displayed by printing on a first surface of the interlayer film body for laminated glass, and the printed part is a guide for a bonding position to a lamination glass member, or product information of the interlayer film for laminated glass.