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.

Provided is a Low-E glass plate protective sheet that can have protective properties for a Low-E glass plate as an object to be protected and can maintain good removability while preventing or inhibiting surface contamination of the object to be protected even when prolongedly adhered thereto. The Low-E glass plate protective sheet is provided. The protective sheet has a PSA layer. The PSA layer comprises at least 95% base polymer by weight.

Provided is a Low-E glass plate protective sheet having excellent long-term reliability. A Low-E glass plate protective sheet is provided. The protective sheet has a PSA layer. The PSA layer has a chloride ion amount of 105 μg or less per gram of PSA, determined by hot water extraction.

Provided is a PSA sheet capable of suitably preventing bubble formation caused by outgassing. This invention provides a PSA sheet comprising a PSA layer that forms an adhesive face. In an aging test where the adhesive face is press-bonded to a glass plate and stored at 50° C. for 24 hours, the PSA sheet has at least 5% post-aging non-bonding area Sa, with Sa defined as the ratio of all areas non-bonding to the glass plate relative to the total area of the adhesive face. The non-bonding areas have parts linearly extending along the adhesive face.

A conductive adhesive sheet includes a first adhesive agent layer, a second adhesive agent layer, and a third layer interposed between the first adhesive agent layer and the second adhesive agent layer, in which the first adhesive agent layer has a storage modulus at 25 degrees C. of less than 2.5×10.sup.5 Pa, the third layer has a storage modulus at 25 degrees C. of 2.5×10.sup.5 Pa or more, and a plurality of conductive linear bodies are arranged to the first adhesive agent layer.

A sound absorbing and insulating member alternately brought into contact with a first partition member and a second partition member. The sound absorbing and insulating member has a plurality of hollow protrusions protruding so as to traverse a gap between the partition members. There is a first and second space between the first and second partition member. The first space is formed in each protrusion and is closed by the first partition member. The second space is provided between adjacent protrusions and is closed by the second partition member. The first and second spaces communicate with each other through a communication part formed as a part of the protrusion. The communication part is configured to communicate an inside of the protrusion with an outside. An opening of the communication part opened to the second space is provided at a side wall of the protrusion.

A composite material for producing an acoustic membrane, wherein the composite material comprises a silicone layer comprising an at least partially uncured silicone rubber and a support layer, wherein the support layer is adjacent to the silicone layer, as well as a method of preparing such a composite material and a process for producing an acoustic membrane from such a composite material.

A composite material for producing an acoustic membrane, wherein the composite material comprises a silicone layer comprising an at least partially uncured silicone rubber and a support layer, wherein the support layer is adjacent to the silicone layer, as well as a method of preparing such a composite material and a process for producing an acoustic membrane from such a composite material.

Devices and methods related to a chitosan-enhanced melamine sponge are provided. A method comprises grafting chitosan on the melamine sponge matrix via the chemical with two or more carboxyl groups; and crosslinking the chitosan with crosslinker under a heating procedure to make a more robust melamine sponge with a larger surface and smaller pores. The chitosan-enhanced melamine sponge is used to separate chemicals from water as a gravity flow-driven filter, and it can be compressed and backwashed for regeneration.

Provided is a PSA sheet capable of suitably preventing bubble formation caused by outgassing. This invention provides a PSA sheet comprising a PSA layer that forms an adhesive face. In an aging test where the adhesive face is press-bonded to a glass plate and stored at 50° C. for 24 hours, the PSA sheet has at least 5% post-aging non-bonding area Sa, with Sa defined as the ratio of all areas non-bonding to the glass plate relative to the total area of the adhesive face. The non-bonding areas have parts linearly extending along the adhesive face.