Polyvinylidene fluoride film material for construction and its production method

Abstract

The invention relates to a polyvinylidene fluoride building film material and relative production. Wherein, it is formed by base cloth; the bottom coat that coated two surfaces of cloth base; the extending polychloroethylene coat composite on the bottom coat; and the modified polyvinylidene fluoride layer coated on the extending polychloroethylene coat. The invention has low demand on base cloth, without concave and convex, with long service life and high strength. Its pollution resistance is higher than 20%.

Description

technical field [0001] The invention relates to a building membrane material, in particular to a polyvinylidene fluoride building membrane material and a production method thereof. Background technique [0002] Existing membrane material products for construction are produced by pasty polyvinyl chloride (PVC) resin coating and polyester fiber base layer, and the surface treatment adopts acrylic compound to form. Its defects are as follows: [0003] 1. High requirements for base fabric. The base fabric must be very flat and evenly tensioned. However, due to the weaving tension of the base fabric, textile parameters, additives, etc., the unit consumption of materials has increased; [0004] 2. The coating flatness of paste polyvinyl chloride (PVC) resin is poor, the surface has concave and convex defects, and the surface appreciation is poor; [0005] 3. The production cycle is long. Due to the long preparation time of the paste resin, it requires a certain storage period ...

AI Technical Summary

Problems solved by technology

However, due to the weaving tension of the base fabric, textile parameters, additives, etc., the unit consumption of materials has increased;

[0004] 2. The coating flatness of paste polyvinyl chloride (PVC) resin is poor, the surface has concave and convex defects, and the surface appreciation is poor;

[0005] 3. The production cycle is long. Due to the long preparation time of the paste resin, it requires a certain storage period (24 hours) before normal production, so it takes up a lot of production facilities and prolongs the production cycle;

[0006] 4. Poor membrane strength

[0007] The polyester base fabric used in the current polyvinyl chloride (PVC) architectural membrane is woven with ordinary polyester filaments, with low strength (11MPa) and large creep (product deformation is 20%)

[0008] The surface treatment is made of acrylic acid, which is easy to age, and the service life is generally 5 years. The self-cleaning performance is poor, and the stain resistance is > 20%.

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