{"id":652,"date":"2024-02-04T12:16:32","date_gmt":"2024-02-04T04:16:32","guid":{"rendered":"https:\/\/www.joyforce.com\/?p=652"},"modified":"2024-02-05T13:52:00","modified_gmt":"2024-02-05T05:52:00","slug":"basic-characteristics-of-polyvinyl-alcohol","status":"publish","type":"post","link":"https:\/\/www.joyforce.com\/el\/blogs\/basic-characteristics-of-polyvinyl-alcohol.html","title":{"rendered":"\u0392\u03b1\u03c3\u03b9\u03ba\u03ac \u03c7\u03b1\u03c1\u03b1\u03ba\u03c4\u03b7\u03c1\u03b9\u03c3\u03c4\u03b9\u03ba\u03ac \u03c4\u03b7\u03c2 \u03c0\u03bf\u03bb\u03c5\u03b2\u03b9\u03bd\u03c5\u03bb\u03b9\u03ba\u03ae\u03c2 \u03b1\u03bb\u03ba\u03bf\u03cc\u03bb\u03b7\u03c2"},"content":{"rendered":"

Basic characteristics of\u00a0polyvinyl alcohol<\/a><\/p>\n

(1) Viscosity: Its viscosity varies with variety, concentration and temperature. As the concentration increases, the viscosity value rises sharply; as the temperature increases, the viscosity decreases significantly.<\/p>\n

(2) Adhesion:\u00a0\u03a0\u03bf\u03bb\u03c5\u03b2\u03b9\u03bd\u03c5\u03bb\u03b9\u03ba\u03ae \u03b1\u03bb\u03ba\u03bf\u03cc\u03bb\u03b7<\/a>\u00a0has strong adhesion to hydrophilic porous surface materials, such as paper, textiles, wood, concrete, mortar and smooth and non-absorbent surfaces.<\/p>\n

(3) Film-forming properties: It can form a better flexible film, and the mechanical strength of\u00a0polyvinyl alcohol<\/a>\u00a0can be adjusted by plasticizers.<\/p>\n

(4) Gas impermeability: Afterpolyvinyl alcohol<\/a>\u00a0is formed into a film, it is highly impermeable to many gases, especially oxygen, carbon dioxide, hydrogen, helium, hydrogen sulfide and so on. But for chlorine and water vapor, the gas permeability is high, and the gas has a high passing rate for polyvinyl alcohol.<\/p>\n

(5) Chemical resistance: It has high corrosion resistance to calcium hydroxide, acetic acid, most inorganic acids, sodium nitrate, aluminum chloride, calcium chloride, calcium carbonate, sodium sulfate, and potassium sulfate.<\/p>\n

(6) Water solubility: The solubility of\u00a0polyvinyl alcohol<\/a>\u00a0is closely related to the degree of alcoholysis of the product. Products with a degree of alcoholysis of 87% to 89% have good water solubility, such as\u00a0polyvinyl alcohol<\/a>\u00a0PVA24-88, which has a degree of alcoholysis of 88%, and can be dissolved well in cold or hot water. In actual production, the use of hot water can speed up the dissolution rate. Products with a degree of alcoholysis above 90% can only be dissolved in hot water at 95\u00b0C.<\/p>\n

\"Polyvinyl<\/p>","protected":false},"excerpt":{"rendered":"

Basic characteristics of\u00a0polyvinyl alcohol (1) Viscosity: Its viscosity varies with variety, concentration and temperature. As the concentration increases, the viscosity value rises sharply; as the temperature increases, the viscosity decreases significantly. (2) Adhesion:\u00a0Polyvinyl alcohol\u00a0has strong adhesion to hydrophilic porous surface materials, such as paper, textiles, wood, concrete, mortar and smooth and non-absorbent surfaces. (3) Film-forming […]<\/p>","protected":false},"author":1,"featured_media":656,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[43],"tags":[],"class_list":["post-652","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs"],"acf":[],"yoast_head":"\nBasic Characteristics of Polyvinyl Alcohol - JOYFORCE INDUSTRIAL<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.joyforce.com\/el\/blogs\/basic-characteristics-of-polyvinyl-alcohol.html\/\" \/>\n<meta property=\"og:locale\" content=\"el_GR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Basic Characteristics of Polyvinyl Alcohol - JOYFORCE INDUSTRIAL\" \/>\n<meta property=\"og:description\" content=\"Basic characteristics of\u00a0polyvinyl alcohol (1) Viscosity: Its viscosity varies with variety, concentration and temperature. As the concentration increases, the viscosity value rises sharply; as the temperature increases, the viscosity decreases significantly. (2) Adhesion:\u00a0Polyvinyl alcohol\u00a0has strong adhesion to hydrophilic porous surface materials, such as paper, textiles, wood, concrete, mortar and smooth and non-absorbent surfaces. 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