Method for protecting low-E glass plate, method for producing glass unit, laminate and protective sheet for low-E glass plate
AssigneeNitto Denko Corporation
InventorsYuta Shimazaki, Kosuke Yonezaki, Hakaru Horiguchi, Kunimasa Mishima
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Abstract
Provided is a Low-E glass plate protection method capable of preventing or inhibiting Low-E layer alteration. In the protection method, a protective sheet having a substrate and a PSA layer provided to at least one face of the substrate is applied for protection via the PSA layer to a Low-E glass plate having a Low-E layer that comprises a zinc component. The method is characterized by using the protective sheet wherein the PSA layer is formed from a water-dispersed PSA composition and includes less than 850 μg ammonia per gram of PSA layer weight.
Claims20
A protective sheet for a Low-E glass plate, the protective sheet comprising a substrate and a pressure-sensitive adhesive layer formed thereon,
- wherein the Low-E glass plate includes a Low-E layer comprising a zinc component, and the pressure-sensitive adhesive layer is adhered to the Low-E layer of the Low-E glass plate,
- wherein
- the pressure-sensitive adhesive layer in the protective sheet is formed from a water-dispersed pressure-sensitive adhesive composition, and
- the pressure-sensitive adhesive layer includes ammonia,
- the ammonia content being 300 μg or greater and less than 850 μg per gram of pressure-sensitive adhesive layer, wherein the ammonia content is determined by hot water extraction.
A laminate formed with a Low-E glass plate including a Low-E layer comprising a zinc component;
- and
- a protective sheet including a substrate and a pressure-sensitive adhesive layer provided to at least one face of the substrate,
- wherein the protective sheet is adhered to the Low-E layer of the Low-E glass plate by the pressure-sensitive adhesive layer,
- the pressure-sensitive adhesive layer in the protective sheet is formed from a water-dispersed pressure-sensitive adhesive composition, and
- the pressure-sensitive adhesive layer includes ammonia,
- the ammonia content being 300 μg or greater and less than 850 μg per gram of pressure-sensitive adhesive layer, wherein the ammonia content is determined by hot water extraction.
A protection method for a Low-E glass plate, the protection method comprising protecting the Low-E glass plate that includes a Low-E layer comprising a zinc component by applying a protective sheet that includes a substrate and a pressure-sensitive adhesive layer provided to at least one face of the substrate to the Low-E layer via the pressure-sensitive adhesive layer,
- wherein the pressure-sensitive adhesive layer is formed from a water-dispersed pressure-sensitive adhesive composition and includes ammonia,
- wherein the ammonia content being 300 μg or greater and less than 850 μg per gram of pressure-sensitive adhesive layer,
- wherein the ammonia content is determined by hot water extraction.
A method for producing a glass unit, the method comprising
- a step (A) of obtaining a Low-E glass plate having a Low-E layer;
- a step (B) of applying a protective sheet to a surface of the Low-E layer of the Low-E glass plate;
- an optional step (C) of subjecting the Low-E glass plate having the protective sheet applied thereon to at least one process selected from the group consisting of transportation, storage, processing, washing and handling;
- a step (D) of removing the protective sheet from the Low-E glass plate;
- and
- a step (E) of fabricating a glass unit using the Low-E glass plate;
- wherein
- the Low-E layer comprises a zinc component,
- the protective sheet includes a substrate and a pressure-sensitive adhesive layer provided to at least one face of the substrate,
- the pressure-sensitive adhesive layer is adhered to the surface of the Low-E layer,
- the pressure-sensitive adhesive layer is formed from a water-dispersed pressure-sensitive adhesive composition, and
- the pressure-sensitive adhesive layer includes ammonia,
- the ammonia content being 300 μg or greater and less than 850 μg per gram of pressure-sensitive adhesive layer, wherein the ammonia content is determined by hot water extraction.
Dependencies are inferred from the claim text.