Dip-formed article comprising a layer derived from latex composition for dip-forming

A dip-formed article comprising a layer derived from a latex composition for dip-forming,

• the latex composition for dip-forming comprising:
• an epoxy crosslinking agent, and
• a carboxylic acid-modified nitrile-based copolymer latex, the carboxylic acid-modified nitrile-based copolymer latex comprising a carboxylic acid-modified nitrile-based copolymer, the carboxylic acid-modified nitrile-based copolymer comprising, based on a dry weight of the carboxylic acid-modified nitrile-based copolymer:
• 18 to 28 wt % of an ethylenically unsaturated nitrile-based monomer-derived unit,
• 67.5 to 79.5 wt % of a conjugated diene-based monomer-derived unit, and
• 2.5 to 4.5 wt % of an ethylenically unsaturated acid monomer-derived unit,
• wherein an amount of the epoxy crosslinking agent added is 0.1 to 1.6 parts by weight based on 100 parts by weight of the carboxylic acid-modified nitrile-based copolymer,
• wherein the dip-formed article has an elongation of more than 650% and satisfies the following Expressions 1 and 2,
• [Math. 17]
• [Expression 1]
• k1′+k2′+k3′≤9.3 N/mm (1)
• [Expression 2]
• 0.55≤k1′/(k1′+k2′+k3′) (2)
• wherein k1′ is a value obtained by dividing an equilibrium coefficient k1 by a thickness of a test piece, and k2′ and k3′ are values obtained by dividing viscous coefficients k2 and k3 by the thickness of the test piece, respectively, and
• wherein the carboxylic acid-modified nitrile-based copolymer latex satisfies the following Expressions 3 and 4,
• [Expression 3]
• 1.0≤CV0≤3.0 mm2/s (3)
• [Expression 4]
• 0.8≤P≤1,P=CVD/CV0 (4)
• wherein CV0 represents a capillary viscosity of the carboxylic acid-modified nitrile-based copolymer latex in a swollen state, and CVD represents a capillary viscosity of the carboxylic acid-modified nitrile-based copolymer latex in a de-swollen state.