Environmentally friendly impregnation systems for fiber surface treatment and preparation methods thereof and an impregnation treatment method

A method for impregnating fiber surface comprising the following steps:

• (A) impregnating the fiber in a one-step impregnation solution;
• (B) drying and curing the impregnated fibers obtained in step (A),
• wherein the one-step impregnation solution comprises the following components in parts by weight:
• 100 parts of deionized water;
• 1-30 parts of hydroxyl acrylic resin;
• 0.1-10 parts of amino resin;
• 1-10 parts of blocked isocyanate;
• 0.1-5 parts of accelerator and 50-180 parts of rubber latex;
• or
• a method for impregnating fiber surface comprising the following steps:
• i) placing the fiber in a one-bath impregnation solution for impregnation, wherein the one-bath impregnation solution comprises the following components in parts by weight:
• 0.5-2.5 parts of epoxy resin, 3-10 parts of blocked isocyanate and 90-110 parts of deionized water;
• ii) drying and curing the impregnated fibers obtained in step i);
• followed by curing,
• iii) placing the fiber treated in step ii) in a two-bath impregnation solution for impregnation, wherein the two-bath impregnation solution comprises the following components in parts by weight:
• 5-15 parts of hydroxyl acrylic resin, 0.5-3 parts of amino resin, 1-5 parts of accelerator, 80-200 parts of rubber latex and 90-110 parts of deionized water;
• and
• iv) drying and curing the treated fibers of step iii).