Coating agent for modifying heat-sealing substrate, laminate
A technology of coating agents and laminates, applied in coatings, chemical instruments and methods, devices for coating liquids on surfaces, etc., can solve problems such as difficulty in coping with cost reduction, limited filming, cost reduction, etc., and achieve non-adsorption excellent effect
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no. 1 approach
[0070] A coating agent for modifying a heat-sealing base material (hereinafter also referred to as "the present coating agent". It may also be described only as a coating agent for modifying a base material) according to one embodiment of the present invention is coated on the heat-sealing base material. on the cover. This coating agent contains a block copolymer and a liquid medium.
[0071] This coating agent may further contain a curing agent as necessary.
[0072] This coating agent may further contain other components other than the block copolymer, liquid medium, and curing agent as needed.
[0073] (block copolymer)
[0074] The block copolymer in this embodiment has a block (A) and a block (B). A block copolymer is a copolymer capable of forming a lamella-like microphase-separated structure (hereinafter also referred to as "lamellar structure"). The block copolymer may further have another block other than the block (A) and the block (B) within the range that does ...
no. 2 approach
[0161] The coating agent for modifying a heat-sealing substrate in the second embodiment is a coating agent for modifying a heat-sealing substrate coated on the heat surface of a heat-sealing substrate, which contains a block copolymer and a liquid medium, the The block copolymer has a block (A2) constituting a non-absorptive layer and a block (B2) constituting a layer capable of being bonded or fused with the heat-sealing substrate, and the volume fraction of the block (A2) is 0.35 or more and 0.65 or less.
[0162] This embodiment differs from the first embodiment in that block (A2) is used as block (A) and block (B2) is used as block (B). However, the descriptions described in the first embodiment can be applied to the present embodiment unless otherwise specified.
[0163] The coating agent for modifying a heat-sealing base material according to the present embodiment imparts non-adsorptive properties to a sealing film, and achieves both heat-sealability and non-adsorptiv...
Embodiment 1A
[0306] EVA (Novatec TMEVA, manufactured by Mitsubishi Chemical Co., Ltd.) was extrusion molded on a PET film (E5100 manufactured by Toyobo Co., Ltd., thickness 12 μm) to obtain a laminated film (EVA thickness 30 μm). The EVA surface of the obtained laminated film was corona-treated.
[0307] In addition, PVAc-b-P(AN-rand-BA) as a block copolymer (Mw of PVAc is 12500, Mw of P(AN-rand-BA) is 11000, AN / BA molar ratio=1 / 0.11, P (The volume fraction of (AN-rand-BA) is 0.48) was dissolved in MEK to obtain a 5% by mass solution (coating agent).
[0308] The corona-treated EVA surface of the laminated film was coated once with the above-mentioned 5 mass % solution using a wire rod #6, and then heat-treated at 105° C. for 10 minutes to form a coating layer with a thickness of 0.5 μm. Thus, a laminate in which PET / EVA / coating layers were laminated in this order was obtained.
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Abstract
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