Polyamide-based laminated biaxially-stretched film, and vapor-deposited polyamide-based laminated resin film
A polyamide-based, biaxial stretching technology, applied in the direction of synthetic resin layered products, layered products, chemical instruments and methods, etc.
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[0282] Next, the present invention will be described in more detail using examples (each experimental example), but the present invention is not limited to the following examples. In addition, evaluation of a film was performed by the following measuring method. First, the measurement method of the characteristics of the substance constituting the adhesion-improving coating coated on the film will be described below. In addition, in the following description, about a mixture, a composition, etc., a part by weight is simply expressed as a part, and % by weight is simply expressed as %.
[0283] [Weight average molecular weight]
[0284] 0.03 g of the polymer was dissolved in 10 ml of tetrahydrofuran, and measured with a GPC-LALLS low-angle light scattering photometer LS-8000 (manufactured by Tosoh Corporation, tetrahydrofuran solvent, reference: polystyrene).
[0285] [Grafting efficiency of polyester]
[0286] Using UNITY 500 (manufactured by Varian Co., Ltd.), 1H-NMR (220 ...
experiment example 1
[0359] Two types of three-layer coextrusion were performed using a T-die device to obtain an unstretched sheet having the following configuration. In the composition of layer B / layer A / layer B, the total thickness of the unstretched sheet is 190 μm, and the ratio of the thickness of each layer to the total thickness is layer B / layer A / layer B=40% / 20% / 40%, the extruded resin temperature of layer A was 270°C, and the extruded resin temperature of layer B was 260°C. Composition constituting layer A: a composition comprising poly-m-phenylene adipamide (manufactured by Mitsubishi Gas Chemical Co., Ltd., RV=2.65)=100% by weight. The composition constituting the B layer: 95% by weight of nylon 6 (manufactured by Toyobo Co., Ltd., RV = 2.8) and 5% by weight of a polyamide-based block copolymer (nylon 12 / polybutylene) as a thermoplastic elastomer Alcohol copolymer, a composition consisting of Pebax 4033 manufactured by Alkema, RV=2.0).
[0360] The obtained unstretched sheet was str...
experiment example 2
[0362] In the description of Experimental Example 1, a biaxially stretched film was obtained in the same manner as in Experimental Example 1 except that it was replaced with the form shown below.
[0363] Composition constituting the B layer: a composition composed of 98% by weight of nylon 6 and 2% by weight of a polyamide-based block copolymer.
[0364]The oxygen transmission rate and the number of pores were measured for the obtained biaxially stretched film. In addition, tests for storage stability and vibration durability were performed on packaging bags produced from the obtained films. These results are shown in Table 1.
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