Super absorbent polymer film and preparation method thereof
AssigneeLG Chem, Ltd.
InventorsKiyoul Yoon, Hyosook Joo, Seongkyun Kang, Yu Jin Kim, Gicheul Kim, Hyeon Choi
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Abstract
The present disclosure relates to a super absorbent polymer film and a preparation method of the same. Specifically, it relates to a new type of super absorbent polymer film, which is thin and exhibits excellent absorption performance, flexibility and elasticity while having little change in the shape of products. In addition, the super absorbent polymer film of the present disclosure is free from scattering or leaking, and does not require an auxiliary substance such as pulp, so that products can be made thinner and the manufacturing process and costs may be reduced.
Claims15
A super absorbent polymer film, prepared by forming a monomer composition by mixing an acrylic acid-based monomer having at least partially neutralized acidic groups, a cellulose-based thickener, a moisturizing agent, a polymerization initiator, and a solvent;
- casting the monomer composition on a substrate to form a monomer composition film;
- forming a hydrogel polymer film by irradiating heat and/or light while drawing the monomer composition film;
- and drying the hydrogel polymer film,
- wherein the super absorbent polymer film has a thickness of 0.001 to 0.5 mm,
- a centrifugal retention capacity (CRC) of 23 g/g or more when measured in accordance with EDANA WSP 241.2, and
- an elongation of 100% or more calculated by Equation 1:
- Elongation (%)=(L1-L0)/L0*100 [Equation 1]
- in Equation 1,
- L0 is an initial gage length, and
- L1 is a gage length at fracture when a specimen is pulled at a rate of 0.5 mm per minute.
Dependencies are inferred from the claim text.