Polyester mulching film
A coated film and polyester-based technology, which is applied to inks, household utensils, applications, etc., can solve the problems of lowering, ink falling off, commodity value, etc.
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Embodiment 1
[0098] A rutile type containing 80% by weight of polyethylene terephthalate resin with an intrinsic viscosity of 0.62dl / g and 15% by weight of polystyrene with a melt index of 5.5g / 10min and an average particle size of 0.3μm is melted at 285°C A resin composition containing 5% by weight of titanium oxide was extruded on a roll with a surface temperature of 40°C, and then the obtained unstretched sheet was longitudinally stretched 3.5 times at 90°C to obtain a uniaxially stretched polyester film. Stretch film.
[0099] A coating liquid was prepared. The coating liquid contained a copolyester resin (manufactured by Toyobo Co., Ltd., Bailenal) with a solid content of 3.15% by weight, and a terminal isocyanate group with a solid content of 5.85% by weight. Water-based block water-soluble polyurethane resin (made by Daiichi Kogyo Pharmaceutical Co., Ltd., Elastron), a quaternary ammonium salt-based antistatic agent as an antistatic agent in an amount of 6.20% by weight to the above...
Embodiment 2
[0103] In addition to making 2.5% by weight of copolyester resin contained in the coating layer and 4.6% by weight of water-soluble polyurethane as inert particles, 6.0% by weight of silicon oxide particles with an average particle diameter of 0.45 μm and an average particle size of 0.8 μm A polyester-based coating film was obtained in exactly the same manner as in Example 1 except that the calcium carbonate particles were 2.0% by weight. The properties and evaluation results of the obtained films are shown in Table 1 and Table 2.
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