Weatherproof Pressure Sensitive Adhesive Tape Composition

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Solution Overview

Problem

Existing pressure sensitive adhesive tapes fail to maintain performance in extreme conditions such as underwater environments, high humidity, and varying temperatures, and are not resistant to chemical contaminations.

Innovation Solution

A weatherproof and highly waterproof pressure sensitive adhesive tape composition is developed, featuring a substrate layer coated with a non-resinous polyorganosiloxane co-binding layer and a pressure sensitive adhesive layer containing acrylates terminated with hydroxyl groups, which is resistant to extreme conditions through surface treatments and a solvent-based vapour reactive technique.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional pressure sensitive adhesive tapes are used, then they can be manufactured with simple structures, but they fail to maintain performance in extreme conditions such as underwater environments, high humidity, and varying temperatures

Engineering Contradiction:

Improveperformance maintenance in extreme conditionsVSAvoidtape structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies composite materials by combining multiple functional layers: a water-resistant substrate layer, a polyorganosiloxane co-binding layer for enhanced adhesion, and a pressure-sensitive adhesive layer with hydroxyl-terminated acrylates. This composite structure enables the tape to withstand extreme conditions including underwater environments, high humidity, and temperature variations while maintaining reliable performance for at least 15 years.

Inventive Principle:

Principle #40Composite materials

2Reliability

If conventional adhesive tapes are used, then the manufacturing process is simple, but they lack resistance to chemical contaminations in water such as acidic, alkaline, or salty water

Engineering Contradiction:

Improveresistance to chemical contaminationsVSAvoidmanufacturing process complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent employs parameter changes by modifying the chemical composition of the adhesive layer using hydroxyl-terminated acrylates and incorporating specific additives that provide chemical resistance. The formulation is designed to withstand a wide pH range (acidic to alkaline conditions) and salinity levels, enabling the tape to maintain adhesion and performance in chemically contaminated water environments.

Inventive Principle:

Principle #35Parameter changes

3Duration of action of stationary object

If conventional pressure sensitive adhesive tapes are used, then they have short service life, but they cannot withstand prolonged exposure to extreme ambient conditions

Engineering Contradiction:

Improvedwell time without performance failureVSAvoidenvironmental degradation

Core Design Contradiction:

Duration of action of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary action by pre-treating the substrate with a polyorganosiloxane co-binding layer before applying the pressure-sensitive adhesive layer. This preliminary treatment creates a protective barrier that prevents environmental degradation factors from reaching the adhesive, enabling the tape to withstand prolonged exposure to extreme conditions including underwater immersion, high humidity, and temperature cycling for at least 15 years without performance failure.

Inventive Principle:

Principle #10Preliminary action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The tape maintains adhesion and performance for at least 15 years in extreme conditions, including underwater use, without additional protective layers, ensuring durability and reliability in harsh environments.

Implementation Method 1

the substrate layer is treated by at least one non-resinous polyorganosiloxane (molecular structure pictured as below, to help increase wetting tension of the substrate)

Methodology Applied

Scientific EffectWetting: Wetting

Implementation Method 2

These treatments may be provided to increase the anchoring of the PSA layer to the substrate co-binding layer comprising a non-resinous polyorganosiloxane

Methodology Applied

Scientific EffectCorona discharge: Corona Discharge

Implementation Method 3

These treatments may be provided to increase the anchoring of the PSA layer to the substrate co-binding layer comprising a non-resinous polyorganosiloxane

Methodology Applied

Scientific EffectPlasma treatment: Plasma

Implementation Method 4

coating a pressure sensitive adhesive composition comprising an acrylate on the application base through a coating technique, obtained by way of Solvent Based Vapour reactive technique

Methodology Applied

Scientific EffectVapour reactive technique: Chemical Vapour Deposition

Data Source

PatentUS11891552B2Weather proof pressure sensitive adhesive tape composition and a process for production thereof

Publication Date: 2024.02.06 SHUKLA ASHOK

AI summary

There is provided a weather proof pressure sensitive adhesive tape composition having 15 years or more dwell time in ambient conditions, comprising ambient humidity in the range of RH 30% to 100% RH including aggressive under water conditions, ambient pressures in the range of 0.75 bar to 1.5 bar at normal temperature, ambient temperature in the range of (−) 30° C. to 75° C. at normal pressure, ambient acidity and alkalinity in the range of pH 4.5 to pH 10.5 in water, ambient salinity of water in under water conditions of up to 1.2 mole equivalent of sodium chloride and ambient surface fluid resistance of up to 2.7×10−3 cubic meter per second per meter contact edge of the tape.