Heat preservation material for covering and overwintering wine grapes in low-temperature area and making method of heat preservation material
A thermal insulation material and technology in low-temperature areas, applied in the field of thermal insulation materials, to achieve the effects of simple and easy production methods, improved economic benefits, and unified material specifications
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[0038] a. Prepare the four layers of insulation materials according to the following specifications and stack them neatly: the first layer is 75D (89g / m 2 ) Polyester filament cloth, specification 8.4×2.4m; second layer 8-12 silk (0.8-1.2mm) EVA non-drip shed film, specification 8.4×2.4m; third layer 500-700g / m 2 Needle-punched felt, size 8.0×2.0m; the fourth layer is 1.5-2.5mm thick EPE foam material, size 8.0×2.0m.
[0039] b. Fold the first layer and the second layer back to the hemming, and the length of each side hemming is 20cm.
[0040] c. After the hemming is completed, use an industrial sewing machine to hem the hem. The width of the hem is 10-15cm. After the seaming is completed, the long side is 8cm away from the sideline, and the riveted buckle is reinforced every 50cm. Sew 200×3cm Velcro on the short side at a distance of 5cm from the sideline. The front and back sides of the sticky fastener are respectively located on the front and back sides of the thermal in...
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