Stretch-resistant PVC (polyvinyl chloride) film and preparation method thereof

By introducing β-hydroxyethyl acrylate/methylhexahydrophthalic anhydride modified epoxidized soybean oil and hydrogenated castor oil acid modified nano-calcium carbonate into PVC film, the contradiction between tensile strength and toughness of PVC film is resolved, achieving high-performance tensile resistance, suitable for the protection of metal plate surfaces.

CN122302448APending Publication Date: 2026-06-30HANGZHOU DAMEI PLASTIC CO LTD
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Patent Information

Application Number
CN202610567438.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-27
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Traditional PVC films struggle to balance tensile strength and toughness. The use of plasticizers leads to a decrease in tensile strength and easy migration and exudation, resulting in unstable performance.

Method used

Epoxidized soybean oil modified with β-hydroxyethyl acrylate/methylhexahydrophthalic anhydride and nano-calcium carbonate modified with hydrogenated castor oil acid were used as reinforcing agents. Through uniform dispersion and bonding in the PVC matrix, the tensile strength and elongation at break of the material were enhanced.

Benefits of technology

The prepared tensile PVC film has high longitudinal and transverse tensile strength, with longitudinal elongation at break >285% and transverse elongation at break >315%. When applied to metal plate surfaces, it can withstand mechanical traction and deformation, avoiding processing failure.

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Abstract

The invention relates to a stretch-resistant PVC (polyvinyl chloride) film and a preparation method thereof, and the stretch-resistant PVC film is prepared from the following raw materials in parts by weight: 100-140 parts of PVC resin, 35-55 parts of dioctyl terephthalate, 3-8 parts of dioctyl adipate, 3-6 parts of a zinc-calcium composite stabilizer and 4-6 parts of acrylic acid-beta-hydroxyethyl ester / methylhexahydrophthalic anhydride modified epoxidized soybean oil. The coating comprises the following components in parts by weight: 15-25 parts of hydrogenated ricinoleic acid modified nano calcium carbonate, 8-12 parts of heavy calcium carbonate, 3-5 parts of titanium dioxide and 0.01-0.03 part of pigment. The PVC film has good tensile strength, elongation at break and longitudinal tensile strength gt; the tensile strength is 28.5 MPa, and the transverse tensile strength is gt; the longitudinal elongation at break is gt; 285%, and the transverse elongation at break is gt; and 315%.
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