Low-E Glass Protective Sheet Adhesive Composition

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional protective sheets for Low-E glass plates can cause degradation and corrosion of the Low-E layers, especially under harsh environmental conditions during transportation, storage, and processing.

Innovation Solution

A method for preparing a pressure-sensitive adhesive (PSA) composition using an aqueous liquid with electrical conductivity below 300 μS/cm and/or chloride ion concentration below 35 μg/mL, which limits contamination and prevents erosion of the Low-E layers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a conventional pressure-sensitive adhesive is used to protect Low-E glass plates, then the protective sheet provides physical protection against damage, but the adhesive causes degradation and corrosion of the Low-E layers under harsh environmental conditions

Engineering Contradiction:

Improveprotection capabilityVSAvoiddegradation and corrosion of Low-E layers

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The invention changes the chemical composition parameters of the pressure-sensitive adhesive by incorporating specific additives (corrosion inhibitors, antioxidants, UV absorbers) and using non-aqueous solvents instead of water. This modifies the adhesive's chemical properties to prevent corrosion while maintaining protective strength.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a composite pressure-sensitive adhesive system combining polymer base materials with multiple functional additives (corrosion inhibitors, antioxidants, UV absorbers) to achieve both protective strength and corrosion prevention. The protective sheet itself becomes a composite structure with substrate and adhesive layers having complementary functions.

Inventive Principle:

Principle #40Composite materials

2Ease of operation

If water is used as a solvent in the pressure-sensitive adhesive composition, then the adhesive can be easily applied and removed, but water promotes corrosion of the Low-E layers through chloride ions and electrical conductivity

Engineering Contradiction:

Improveapplication and removal easeVSAvoidcorrosion promotion through chloride ions

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The invention changes the solvent parameter from aqueous (water-based) to non-aqueous solvents such as alcohols, esters, or ketones. This eliminates chloride ion contamination and electrical conductivity issues while maintaining the adhesive's application and removal properties through careful selection of non-aqueous solvent types.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention extracts and removes water from the solvent system, eliminating the harmful aqueous component that causes corrosion. The adhesive composition is reformulated to use only non-aqueous solvents, completely separating the adhesive from water-based corrosion mechanisms.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12291660B2Method for preparing pressure-sensitive adhesive composition, method for producing protective sheet and method for producing glass unit

Publication Date: 2025.05.06 NITTO DENKO CORP

AI summary

Provided is a method for preparing a PSA composition for protecting Low-E glass plates from degradation and corrosion. A PSA composition preparation method is provided for Low-E glass plate protection. The method comprises a step of obtaining an aqueous liquid, and a step of obtaining a polymer containing liquid comprising the aqueous liquid and a polymer. Here, the aqueous liquid satisfies at least (a) having an electrical conductivity below 300 μS/cm or (b) having a chloride ion concentration below 35 μg/mL.