{"id":1126,"date":"2026-07-13T03:30:07","date_gmt":"2026-07-13T03:30:07","guid":{"rendered":"https:\/\/lypaperchem.com\/?p=1126"},"modified":"2026-07-16T03:29:03","modified_gmt":"2026-07-16T03:29:03","slug":"bio-enzyme-sizing-agents-a-sustainable-revolution-in-paper-surface-sizing-technology","status":"publish","type":"post","link":"https:\/\/lypaperchem.com\/ru\/bio-enzyme-sizing-agents-a-sustainable-revolution-in-paper-surface-sizing-technology\/","title":{"rendered":"\u0411\u0438\u043e\u0444\u0435\u0440\u043c\u0435\u043d\u0442\u043d\u044b\u0435 \u043f\u0440\u043e\u043a\u043b\u0435\u0438\u0432\u0430\u044e\u0449\u0438\u0435 \u0432\u0435\u0449\u0435\u0441\u0442\u0432\u0430: \u044d\u043a\u043e\u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u0438 \u0443\u0441\u0442\u043e\u0439\u0447\u0438\u0432\u0430\u044f \u0440\u0435\u0432\u043e\u043b\u044e\u0446\u0438\u044f \u0432 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438 \u043f\u0440\u043e\u043a\u043b\u0435\u0438\u0432\u0430\u043d\u0438\u044f \u043f\u043e\u0432\u0435\u0440\u0445\u043d\u043e\u0441\u0442\u0438 \u0431\u0443\u043c\u0430\u0433\u0438"},"content":{"rendered":"<h1 class=\"wp-block-heading\">\u0411\u0438\u043e\u0444\u0435\u0440\u043c\u0435\u043d\u0442\u043d\u044b\u0435 \u043f\u0440\u043e\u043a\u043b\u0435\u0438\u0432\u0430\u044e\u0449\u0438\u0435 \u0432\u0435\u0449\u0435\u0441\u0442\u0432\u0430: \u044d\u043a\u043e\u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u0438 \u0443\u0441\u0442\u043e\u0439\u0447\u0438\u0432\u0430\u044f \u0440\u0435\u0432\u043e\u043b\u044e\u0446\u0438\u044f \u0432 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438 \u043f\u0440\u043e\u043a\u043b\u0435\u0438\u0432\u0430\u043d\u0438\u044f \u043f\u043e\u0432\u0435\u0440\u0445\u043d\u043e\u0441\u0442\u0438 \u0431\u0443\u043c\u0430\u0433\u0438<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">1. Introduction: The Challenge of Starch Sizing in Modern Papermaking<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Surface sizing is an indispensable process in modern papermaking, essential for improving paper surface strength, water resistance, and printability. Among the various surface sizing agents available, <strong>starch and its derivatives<\/strong> are the most widely used\u2014accounting for the largest volume of any commercial product used for surface sizing of paper. Starch is applied in concentrations typically ranging from 6% to 12%, depending on the desired paper qualities.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For decades, <strong>oxidized starch<\/strong> has been the industry standard for surface sizing. However, the traditional chemical production process for oxidized starch has long presented significant drawbacks: high production costs, difficulty in controlling the degree of oxidation, and environmental pollution. The oxidation process consumes substantial quantities of bleaching agents, generates wastewater, and imposes operational complexities that limit production efficiency.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In response to these challenges, <strong>bio-enzyme sizing technology<\/strong> has emerged as a transformative alternative. By utilizing biological enzymes\u2014primarily \u03b1-amylase\u2014to modify native starch through a controlled enzymatic hydrolysis process, papermakers can now produce high-performance starch sizing agents with exceptional flexibility, cost-effectiveness, and environmental sustainability.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>LY Chem Technology Co., Ltd.<\/strong> , with over two decades of experience in paper chemicals manufacturing, recognizes the transformative potential of bio-enzyme sizing technology. As a comprehensive supplier of papermaking chemical solutions, LY Chem supports papermakers in adopting sustainable, cost-effective technologies that improve product quality while reducing environmental impact.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. The Science of Bio-Enzyme Sizing: Understanding the Mechanism<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">2.1 What Is a Bio-Enzyme Sizing Agent?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A bio-enzyme sizing agent (also known as a <strong>sizing enzyme<\/strong> or <strong>starch-converting enzyme<\/strong>) is a biological enzyme preparation that directly treats native (unmodified) starch to achieve the viscosity and performance characteristics required for paper surface sizing. These enzymes are typically <strong>\u03b1-amylase<\/strong> or <strong>\u03b1\/\u03b2-amylase\u590d\u5408\u9176<\/strong> preparations that hydrolyze starch polymers into lower molecular weight fragments, reducing viscosity to levels suitable for surface sizing applications.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2.2 The Enzymatic Hydrolysis Mechanism<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Starch is a high-molecular-weight polysaccharide composed of glucose units linked by <strong>\u03b1-D-1,4 glycosidic bonds<\/strong> (in amylose) and <strong>\u03b1-D-1,6 glycosidic bonds<\/strong> (at branch points in amylopectin). Bio-enzyme sizing agents\u2014primarily endo-acting \u03b1-amylases\u2014function by <strong>randomly cleaving the \u03b1-1,4 glycosidic bonds<\/strong> within the starch polymer chain.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>The mechanism proceeds as follows:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Gelatinization<\/strong>: When starch is heated to its gelatinization temperature in water, the starch granules swell and the polymer chains become accessible to enzymatic action.<\/li>\n\n\n\n<li><strong>Enzymatic Hydrolysis<\/strong>: The bio-enzyme randomly attacks and cleaves the \u03b1-1,4 glycosidic bonds, breaking the long starch polymer chains into shorter fragments. This reduces the molecular weight and, consequently, the viscosity of the starch paste.<\/li>\n\n\n\n<li><strong>Controlled Viscosity Reduction<\/strong>: The enzyme continues to reduce viscosity until the desired level is reached. Unlike chemical oxidation, which is difficult to control precisely, enzymatic hydrolysis can be <strong>terminated on demand<\/strong> by heating the paste above 95\u00b0C\u2014a temperature at which the enzyme is irreversibly denatured and loses activity.<\/li>\n\n\n\n<li><strong>Viscosity Stabilization<\/strong>: Once the enzyme is inactivated, the viscosity remains <strong>stable and unchanged<\/strong>. This stability is one of the most significant advantages over traditional oxidized starch.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">2.3 The Role of Temperature and pH<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The enzymatic conversion process is highly dependent on <strong>temperature and pH<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Optimal temperature range<\/strong>: 60\u201395\u00b0C<\/li>\n\n\n\n<li><strong>Optimal pH range<\/strong>: 6.0\u20137.0 (with an acceptable range of 5.5\u20137.5)<\/li>\n\n\n\n<li><strong>Enzyme inactivation<\/strong>: Heating to <strong>95\u00b0C for 15\u201320 minutes<\/strong> ensures complete enzyme denaturation<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The \u03b1\/\u03b2-\u590d\u5408\u6dc0\u7c89\u9176 system has been shown to provide <strong>superior control<\/strong> over the starch hydrolysis rate, yielding starch pastes with viscosity well-suited for surface sizing applications. Studies have demonstrated that under optimized conditions (\u03b1-amylase 90 mL\/t, \u03b2-amylase 30 mL\/t at 60\u00b0C), paper strength properties can be significantly enhanced.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3. Bio-Enzyme Sizing vs. Traditional Oxidized Starch: A Comparative Analysis<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">3.1 Limitations of Traditional Oxidized Starch<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The conventional production of oxidized starch for surface sizing involves chemical oxidation using agents such as sodium hypochlorite or hydrogen peroxide. This process has been the industry standard for decades but presents multiple disadvantages:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Limitation<\/th><th>Impact<\/th><\/tr><\/thead><tbody><tr><td><strong>High production cost<\/strong><\/td><td>Chemical reagents, energy consumption, and wastewater treatment drive up costs<\/td><\/tr><tr><td><strong>Difficult oxidation control<\/strong><\/td><td>Degree of oxidation is hard to regulate precisely, leading to inconsistent product quality<\/td><\/tr><tr><td><strong>Environmental pollution<\/strong><\/td><td>Chemical oxidation generates wastewater containing residual oxidants and byproducts<\/td><\/tr><tr><td><strong>Limited concentration<\/strong><\/td><td>Oxidized starch pastes cannot be easily prepared at high concentrations<\/td><\/tr><tr><td><strong>Incomplete dissolution<\/strong><\/td><td>Insoluble particles can cause pipe blockages and operational issues<\/td><\/tr><tr><td><strong>Surface defects<\/strong><\/td><td>Papers sized with oxidized starch may exhibit roughness and linting problems<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">3.2 Advantages of Bio-Enzyme Sizing Technology<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Bio-enzyme sizing technology directly addresses each of these limitations:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. Operational Simplicity<\/strong><br>The enzymatic process is straightforward: simply mix native starch with water, add the enzyme, heat to gelatinization, and control viscosity through temperature management. No complex chemical handling or hazardous reagents are required. The process does not change pH, does not affect subsequent production, and is non-corrosive.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. Precise Viscosity Control<\/strong><br>The greatest advantage of bio-enzyme sizing is <strong>the ability to precisely and flexibly control viscosity at the production site<\/strong>. Viscosity can be adjusted according to real-time production requirements by varying enzyme dosage or hydrolysis time\u2014a flexibility that oxidized starch cannot match.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. Reduced Cost<\/strong><br>The economic benefits are substantial:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Enzyme usage is minimal\u2014typically <strong>0.01\u20130.03% relative to dry starch<\/strong> or <strong>50\u2013150 mL per ton of dry starch<\/strong><\/li>\n\n\n\n<li>A few yuan worth of enzyme (50\u2013400 grams per ton of starch) can replace one ton of oxidized starch<\/li>\n\n\n\n<li>Starch usage can be increased by <strong>15\u201330%<\/strong> while maintaining or improving performance<\/li>\n\n\n\n<li>A pilot plant test demonstrated <strong>cost savings of 53.5 yuan per ton of paper<\/strong> when replacing oxidized starch with enzyme-converted starch<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4. Environmental Sustainability<\/strong><br>The bio-enzyme process eliminates the need for chemical oxidants, reducing wastewater pollution and energy consumption. The enzymatic conversion is a <strong>biological process<\/strong> that generates no hazardous byproducts.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>5. Superior Paper Properties<\/strong><br>Papers produced with bio-enzyme-sized starch exhibit:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Increased surface smoothness<\/strong> and reduced linting\/dusting<\/li>\n\n\n\n<li><strong>\u041f\u043e\u0432\u044b\u0448\u0435\u043d\u043d\u0430\u044f \u043f\u0440\u043e\u0447\u043d\u043e\u0441\u0442\u044c \u043f\u043e\u0432\u0435\u0440\u0445\u043d\u043e\u0441\u0442\u0438<\/strong> and printability<\/li>\n\n\n\n<li><strong>Improved tensile strength<\/strong>, burst index, and folding endurance<\/li>\n\n\n\n<li><strong>Better fiber bonding<\/strong> due to improved penetration and adhesion<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>6. High Concentration Capability<\/strong><br>Bio-enzyme sizing enables the preparation of <strong>high-concentration, low-viscosity starch pastes<\/strong>\u2014a combination that oxidized starch cannot achieve. Higher concentrations mean greater sizing application per pass and improved production efficiency.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.3 Performance Comparison: Data from Industry Applications<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Study: Enzyme-Converted Starch in Lightweight Paper Sizing<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Using \u03b1-amylase to prepare high-concentration, low-viscosity starch sizing agent for 60 g\/m\u00b2 lightweight paper:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Optimal conditions<\/strong>: \u03b1-amylase 0.2\u2030 (relative to dry starch); hold at 80\u00b0C for 20 minutes; rapidly heat to 98\u00b0C and hold for 30 minutes<\/li>\n\n\n\n<li><strong>Product properties<\/strong>: 9.0% solids; viscosity 5.5\u20136.5 mPa\u00b7s at 60\u00b0C<\/li>\n\n\n\n<li><strong>Result<\/strong>: <strong>Surface strength increased by 23%<\/strong> compared to oxidized starch<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Study: Enzyme-Converted Starch in Carbonless Copy Paper Base Stock<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Compared with oxidized starch sizing:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Longitudinal stiffness<\/strong>: Increased by approximately <strong>30 mN\u00b7mm<\/strong><\/li>\n\n\n\n<li><strong>\u041f\u0440\u043e\u0447\u043d\u043e\u0441\u0442\u044c \u043f\u043e\u0432\u0435\u0440\u0445\u043d\u043e\u0441\u0442\u0438<\/strong>: Increased by approximately <strong>0.1 m\/s<\/strong><\/li>\n\n\n\n<li><strong>Cost savings<\/strong>: <strong>53.5 yuan per ton of paper<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Study: Enzyme-Converted Starch in Corrugating Medium<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Using \u03b1\/\u03b2-\u590d\u5408\u6dc0\u7c89\u9176 under optimized conditions (60\u00b0C, 90 mL\/t \u03b1-amylase, 30 mL\/t \u03b2-amylase):<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u041f\u0440\u043e\u0447\u043d\u043e\u0441\u0442\u044c \u043d\u0430 \u0440\u0430\u0437\u0440\u044b\u0432<\/strong>: Increased by <strong>20.7%<\/strong> compared to unsized paper<\/li>\n\n\n\n<li><strong>\u041f\u0440\u043e\u0447\u043d\u043e\u0441\u0442\u044c \u043a\u043e\u043b\u044c\u0446\u0430 \u043d\u0430 \u0440\u0430\u0437\u0434\u0430\u0432\u043b\u0438\u0432\u0430\u043d\u0438\u0435<\/strong>: Increased by <strong>31.8%<\/strong> compared to unsized paper<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">4. Application Process: How to Use Bio-Enzyme Sizing Agents<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">4.1 Intermittent (Batch) Cooking Process<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The batch process is the most commonly used method for preparing bio-enzyme-sized starch pastes:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Step 1: Starch Slurry Preparation<\/strong><br>Add the required amount of clean water and starch to the cooking vessel according to the target solids concentration. Mix thoroughly to form a uniform slurry.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Step 2: Enzyme Addition<\/strong><br>Add the pre-measured bio-enzyme (typical dosage: 0.01\u20130.03% relative to dry starch, or 50\u2013150 mL per ton of dry starch). Mix thoroughly to ensure uniform enzyme distribution throughout the slurry.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Step 3: Steam Cooking<\/strong><br>Begin heating with steam. The temperature should be raised progressively according to the starch viscosity profile. The principle is to <strong>heat directly to 95\u00b0C in a single step<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Step 4: Temperature Control<\/strong><br>Monitor the viscosity during heating. Enzymatic hydrolysis accelerates as the starch gelatinizes and the enzyme becomes active.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Step 5: Enzyme Inactivation<\/strong><br>Once the target viscosity is reached, <strong>hold at 95\u00b0C for 15\u201320 minutes<\/strong>. This heat treatment completely inactivates the enzyme, stabilizing the viscosity.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Step 6: Cooling and Application<\/strong><br>Cool the paste to the <strong>application temperature of 55\u201365\u00b0C<\/strong>. Special cases may require adjustment according to the manufacturer&#8217;s specifications.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Key Process Parameters:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Water pH<\/strong>: 5.5\u20137.5 (optimal: <strong>6.0\u20137.0<\/strong>)<\/li>\n\n\n\n<li><strong>Enzyme dosage<\/strong>: 0.5\u20132.0\u2030 relative to dry starch (cultural paper); 0.5\u20131.0\u2030 (board paper)<\/li>\n\n\n\n<li><strong>Starch concentration<\/strong>: 5\u201310%<\/li>\n\n\n\n<li><strong>Application temperature<\/strong>: 55\u201365\u00b0C<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4.2 Continuous Cooking Process<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The continuous cooking process follows essentially the same principles as the batch process but offers significant advantages for large-scale production:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Fully automated process control<\/strong> ensures consistent quality<\/li>\n\n\n\n<li><strong>Precise control<\/strong> of all process parameters: starch concentration, enzyme dosage, conversion temperature, conversion time, and inactivation temperature<\/li>\n\n\n\n<li><strong>Uniform molecular weight<\/strong> and stable viscosity of the finished paste<\/li>\n\n\n\n<li><strong>Improved paper quality<\/strong> and machine runnability (reduced paper breaks, cleaner dryer surfaces)<\/li>\n\n\n\n<li><strong>Reduced sizing consumption<\/strong> while maintaining equivalent product quality<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4.3 Practical Tips for Successful Application<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Enzyme compatibility<\/strong>: Bio-enzyme sizing agents are compatible with most anionic and nonionic size press additives. They work well with AKD for enhanced water resistance.<\/li>\n\n\n\n<li><strong>Enzyme stability<\/strong>: Enzymes are protein-based materials. Prolonged contact may irritate skin, eyes, and mucous membranes. Appropriate personal protective equipment is recommended.<\/li>\n\n\n\n<li><strong>Storage<\/strong>: Bio-enzyme products should be stored in a cool, dry place. Liquid products typically have a shelf life of 6\u201312 months.<\/li>\n\n\n\n<li><strong>\u041d\u0435 \u0434\u043e\u043f\u0443\u0441\u043a\u0430\u0439\u0442\u0435 \u0437\u0430\u043c\u0435\u0440\u0437\u0430\u043d\u0438\u044f<\/strong>: Enzyme preparations should not be frozen.<\/li>\n\n\n\n<li><strong>Trial optimization<\/strong>: The optimal enzyme dosage should be determined through laboratory trials based on the specific starch type and target viscosity.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">5. Industry Applications and Case Studies<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">5.1 Large-Scale Paper Machine Application<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Case Study: Sun Paper Industry (\u592a\u9633\u7eb8\u4e1a)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sun Paper&#8217;s Tianzhang #19 machine (wire width 4,950 mm, design speed 1,300 m\/min) successfully implemented bio-enzyme sizing technology. The results were impressive:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Raw material change<\/strong>: Switched from oxidized cationic cassava starch to native cassava or corn starch<\/li>\n\n\n\n<li><strong>Process simplification<\/strong>: Eliminated the oxidation and cationization steps<\/li>\n\n\n\n<li><strong>Energy savings<\/strong>: Reduced energy consumption<\/li>\n\n\n\n<li><strong>Emission reduction<\/strong>: Lowered environmental pollution<\/li>\n\n\n\n<li><strong>Cost reduction<\/strong>: Significantly reduced surface sizing chemical costs<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">5.2 Lightweight Paper Production<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For 60 g\/m\u00b2 lightweight paper, \u03b1-amylase-converted starch at 9.0% solids with viscosity of 5.5\u20136.5 mPa\u00b7s at 60\u00b0C delivered a <strong>23% improvement in surface strength<\/strong> compared to conventional oxidized starch sizing.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5.3 Corrugating Medium Production<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Using \u03b1\/\u03b2-\u590d\u5408\u6dc0\u7c89\u9176 under optimized conditions produced a sizing agent that increased:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u041f\u0440\u043e\u0447\u043d\u043e\u0441\u0442\u044c \u043d\u0430 \u0440\u0430\u0437\u0440\u044b\u0432<\/strong>: +20.7%<\/li>\n\n\n\n<li><strong>\u041f\u0440\u043e\u0447\u043d\u043e\u0441\u0442\u044c \u043a\u043e\u043b\u044c\u0446\u0430 \u043d\u0430 \u0440\u0430\u0437\u0434\u0430\u0432\u043b\u0438\u0432\u0430\u043d\u0438\u0435<\/strong>: +31.8%<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">5.4 Carbonless Copy Paper Base Stock<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A pilot-scale trial demonstrated that enzyme-converted starch sizing:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Increased longitudinal stiffness by <strong>30 mN\u00b7mm<\/strong><\/li>\n\n\n\n<li>Increased surface strength by <strong>0.1 m\/s<\/strong><\/li>\n\n\n\n<li>Reduced production cost by <strong>53.5 yuan per ton of paper<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">6. Quality Control and Troubleshooting<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">6.1 Common Issues and Solutions<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Issue: Yellow foam formation<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cause: Incomplete enzyme inactivation or starch degradation<\/li>\n\n\n\n<li>Solution: Ensure proper heat treatment (95\u00b0C for 15\u201320 minutes); consider using inorganic carriers with cationic modification<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Issue: Rod plugging and roll sticking<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cause: Undissolved starch particles or incomplete gelatinization<\/li>\n\n\n\n<li>Solution: Improve mixing; ensure proper cooking temperature profile<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Issue: Uneven sizing<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cause: Inconsistent viscosity or enzyme activity<\/li>\n\n\n\n<li>Solution: Control enzyme dosage and cooking conditions precisely; consider using \u03b1\/\u03b2- systems for better control<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">6.2 Monitoring Key Parameters<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">To ensure consistent sizing quality, papermakers should monitor:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Starch paste viscosity<\/strong>: The primary indicator of enzymatic conversion degree<\/li>\n\n\n\n<li><strong>Solids content<\/strong>: Determines application rate and coverage<\/li>\n\n\n\n<li><strong>Temperature<\/strong>: Critical for both enzymatic activity and inactivation<\/li>\n\n\n\n<li><strong>pH<\/strong>: Affects enzyme activity and stability<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">7. Conclusion: The Future of Sustainable Sizing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Bio-enzyme sizing technology represents a paradigm shift in paper surface sizing\u2014moving from resource-intensive chemical processes to sustainable, precise, and cost-effective biological conversion. The advantages are compelling:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Environmental<\/strong>: Eliminates chemical oxidants, reduces wastewater pollution, and lowers energy consumption<\/li>\n\n\n\n<li><strong>Economic<\/strong>: Reduces chemical costs, enables higher starch concentrations, and improves production efficiency<\/li>\n\n\n\n<li><strong>Quality<\/strong>: Enhances paper surface strength, smoothness, printability, and physical strength properties<\/li>\n\n\n\n<li><strong>Operational<\/strong>: Provides unprecedented flexibility in viscosity control at the production site<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The technology has been widely adopted by major paper mills worldwide. In China, leading mills have transitioned from oxidized starch to enzyme-converted starch systems, achieving significant cost savings and quality improvements.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>LY Chem Technology Co., Ltd.<\/strong> , with over two decades of experience in paper chemicals manufacturing, is committed to supporting papermakers in adopting sustainable, high-performance technologies. As the industry continues to pursue greater sustainability and efficiency, bio-enzyme sizing technology will play an increasingly central role in the future of papermaking.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><em>For more information about LY Chem&#8217;s complete range of papermaking chemical solutions, please contact our technical sales team.<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0421\u043f\u0438\u0441\u043e\u043a \u043b\u0438\u0442\u0435\u0440\u0430\u0442\u0443\u0440\u044b<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Bio-Enzyme Sizing Agents: A Sustainable Revolution in Paper Surface Sizing Technology 1. Introduction: The Challenge &#8230; <a title=\"\u0411\u0438\u043e\u0444\u0435\u0440\u043c\u0435\u043d\u0442\u043d\u044b\u0435 \u043f\u0440\u043e\u043a\u043b\u0435\u0438\u0432\u0430\u044e\u0449\u0438\u0435 \u0432\u0435\u0449\u0435\u0441\u0442\u0432\u0430: \u044d\u043a\u043e\u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u0438 \u0443\u0441\u0442\u043e\u0439\u0447\u0438\u0432\u0430\u044f \u0440\u0435\u0432\u043e\u043b\u044e\u0446\u0438\u044f \u0432 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438 \u043f\u0440\u043e\u043a\u043b\u0435\u0438\u0432\u0430\u043d\u0438\u044f \u043f\u043e\u0432\u0435\u0440\u0445\u043d\u043e\u0441\u0442\u0438 \u0431\u0443\u043c\u0430\u0433\u0438\" class=\"read-more\" href=\"https:\/\/lypaperchem.com\/ru\/bio-enzyme-sizing-agents-a-sustainable-revolution-in-paper-surface-sizing-technology\/\" aria-label=\"\u041f\u0440\u043e\u0447\u0438\u0442\u0430\u0442\u044c \u0431\u043e\u043b\u044c\u0448\u0435 \u043e Bio-Enzyme Sizing Agents: A Sustainable Revolution in Paper Surface Sizing Technology\">\u041f\u043e\u0434\u0440\u043e\u0431\u043d\u0435\u0435<\/a><\/p>","protected":false},"author":1,"featured_media":1215,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-1126","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-application-guides","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-33"],"_links":{"self":[{"href":"https:\/\/lypaperchem.com\/ru\/wp-json\/wp\/v2\/posts\/1126","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lypaperchem.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lypaperchem.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lypaperchem.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lypaperchem.com\/ru\/wp-json\/wp\/v2\/comments?post=1126"}],"version-history":[{"count":1,"href":"https:\/\/lypaperchem.com\/ru\/wp-json\/wp\/v2\/posts\/1126\/revisions"}],"predecessor-version":[{"id":1127,"href":"https:\/\/lypaperchem.com\/ru\/wp-json\/wp\/v2\/posts\/1126\/revisions\/1127"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lypaperchem.com\/ru\/wp-json\/wp\/v2\/media\/1215"}],"wp:attachment":[{"href":"https:\/\/lypaperchem.com\/ru\/wp-json\/wp\/v2\/media?parent=1126"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lypaperchem.com\/ru\/wp-json\/wp\/v2\/categories?post=1126"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lypaperchem.com\/ru\/wp-json\/wp\/v2\/tags?post=1126"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}