Introduction to Aqueous Coated PaperAqueous coated paper represents a significant advancement in paper finishing technology, utilizing water-based coatings to enhance both functional and aesthetic properties. This coating process involves applying a thin layer of water-based polymer solution to paper substrates, which is then cured through evaporation and absorption mechanisms. The resulting surface modification creates a paper product with superior characteristics compared to uncoated alternatives, making it increasingly popular across various industries requiring high-quality printed materials.
Technical Characteristics with Professional DataEnhanced Gloss and Visual AppealAqueous coatings significantly improve surface reflectivity and color vibrancy. Standard aqueous coatings achieve 85-95 Gloss Units (GU) measured at 60° geometry according to TAPPI T480 standards, compared to uncoated paper which typically measures 5-25 GU. This enhanced gloss provides a 25-40% improvement in color saturation and contrast ratio, resulting in more vibrant and visually striking printed materials.Superior Rub and Scuff ResistanceThe polymer-based coating creates a protective barrier that substantially increases durability. Laboratory testing using Sutherland Rub Tester (ASTM D5264) demonstrates that aqueous coated papers withstand 200-400+ rub cycles before showing significant wear, compared to uncoated papers which typically fail after 20-50 rub cycles. This represents a 10-fold improv

The production process of aqueous coated paper centers on applying a water-based coating to the surface of base paper, followed by drying and calendering to ultimately produce finished paper with specific appearance and performance. The entire process is mainly divided into six core stages: base paper preparation, coating formulation, coating application, drying, calendering, and slitting.
Base Paper PreparationThis is the foundation of production, and the quality of base paper directly affects the performance of the final product.Base paper selection: Bleached wood pulp paper or mixed pulp paper is usually used, with a basis weight (weight per square meter) generally ranging from 60 to 300 g/㎡. It must meet requirements for flatness, strength, and absorbency.Base paper processing: The base paper undergoes unwinding, splicing, and tension control to ensure stable operation during the coating stage, preventing wrinkles or breakage.
Water-based Coating FormulationThe coating is crucial for determining the coating performance and must be mixed precisely according to the formula.Core components: Include pigments (such as calcium carbonate, kaolin), binders (such as styrene-acrylic emulsion, polyvinyl alcohol), additives (such as dispersants, defoamers, water repellents), and water.Formulation process: First, mix pigments with water and dispersants, then grind to the specified fineness (usually 10-20 μm). Next, add binders and other additives, stir evenly, and filter to

Printed parchment paper for food is a type of food-grade paper that is printed with various designs, logos, or patterns and is used in the food industry. Here is an introduction to it:CharacteristicsFood Safety: It is made from natural kraft and printed with food-safe inks. It is certified by relevant authorities such as the US FDA and the Compost Manufacturing Alliance (CMA), ensuring it is safe for direct contact with food.Grease Resistance: The paper is greaseproof, which can effectively prevent oil or grease from penetrating, making it suitable for wrapping greasy foods such as hamburgers, sandwiches, and fried foods.Customizability: It can be customized in terms of size, graphics, typography, and design. It can be printed with up to 6 Pantone colors and allows for full-background designs, enabling businesses to print their logos, brand information, or decorative patterns on the paper to achieve brand promotion and product beautification.Heat Resistance: Some printed parchment papers are silicone-coated, which gives them high heat resistance and non-stick properties, making them suitable for use in baking and cooking, such as lining baking trays to prevent food from sticking.
ApplicationsFast Food Industry: It is widely used for one-time disposable packaging of hamburgers, chips, sandwiches, and other foods, which can keep the food clean and tidy and also play a role in brand promotion.Bakery Industry: It can be used to wrap bread, pastries, and other baked goods, whi

Greaseproof paper, with its core function of blocking oil penetration and food-safe properties, is widely used in scenarios closely related to food storage, packaging, and processing. Its applications span home kitchens, commercial food businesses, and even some industrial fields. Below are its most common uses, categorized by scenario for clarity:Home Kitchen & Daily Food PreparationIn home settings, greaseproof paper simplifies cooking, reduces cleanup, and keeps food fresh. Key uses include:Baking liner: Lining baking trays, cake pans, or muffin tins with greaseproof paper prevents baked goods (cookies, cakes, brownies, roasted vegetables) from sticking to the pan. It also eliminates the need to grease the pan with oil or butter, making cleanup faster and reducing excess fat in food.Food wrapping for storage: Wrapping oily or moist foods (e.g., leftover fried chicken, bacon, cheese, butter, or freshly baked bread) in greaseproof paper keeps them fresh— it blocks oil from seeping out (to avoid staining containers) and retains moisture (to prevent food from drying out).Microwave/oven safe separator: When reheating or baking multiple oily foods (e.g., dumplings, pastries), placing a sheet of greaseproof paper between layers prevents them from sticking together and stops oil from transferring between items.
Commercial Food Service & RetailFor cafes, bakeries, fast-food chains, and grocery stores, greaseproof paper is essential for **packaging, presentation, and hygiene**:

PLA Coated Paper: A Comprehensive GuideIn today's environmentally conscious market, sustainable packaging solutions are becoming increasingly important. One such innovation that has gained significant traction is PLA coated paper. This material represents a crucial step forward in reducing our reliance on conventional plastics while maintaining the functional properties required for various applications.What is PLA Coated Paper?PLA coated paper refers to paper or paperboard that has been coated with a thin layer of polylactic acid (PLA), a biopolymer derived from renewable resources such as corn starch, sugarcane, or other plant-based materials. Unlike traditional petroleum-based plastic coatings like polyethylene (PE), PLA is biodegradable and compostable under industrial composting conditions. The coating process typically involves extruding a thin layer of PLA onto the paper substrate, creating a barrier that provides moisture resistance, grease resistance, and heat sealability while maintaining the paper's recyclability and compostability.Technical Characteristics and Performance DataPLA coated paper exhibits several distinctive technical characteristics supported by specific performance data:Barrier Properties: PLA coatings provide excellent barrier performance against oils and greases, with Kit rating values typically between 5-12 depending on coating thickness and base paper quality. The water vapor transmission rate (WVTR) ranges from 15-40 g/m²/24h at 23°C

An In-Depth Look at Wax Coated Paper: Properties, Applications, and CareWax coated paper is a specialized packaging material created by applying a layer of wax—typically paraffin or soybean-based—to one or both sides of a paper substrate. This process, which can be done via curtain coating, saturation, or dry waxing, transforms ordinary paper into a robust barrier against moisture, grease, and gases. Historically, it was the go-to solution for preserving perishable goods before the widespread adoption of plastics. Despite the rise of modern polymers, wax coated paper remains highly relevant due to its unique combination of performance, compostability in certain formulations, and a classic aesthetic that appeals to consumers. Its functionality is not merely anecdotal; it is defined by a set of measurable physical and barrier properties that make it suitable for demanding applications.Defining Characteristics and Technical DataThe efficacy of wax coated paper is rooted in its quantifiable characteristics. The wax layer fundamentally alters the properties of the base paper, providing a set of performance metrics that can be precisely measured.1. Superior Moisture Resistance and Water Vapor Transmission Rate (WVTR)The primary function of the wax coating is to create a hydrophobic barrier. This prevents liquid water from penetrating the paper and significantly slows the transmission of water vapor. The effectiveness of this barrier is measured by the Water Vapor Transmission Rat

What is Greaseproof Paper Custom?Greaseproof paper custom refers to specialized paper that is engineered to possess specific properties tailored to unique industrial, commercial, or artistic requirements. Unlike standard greaseproof paper, which offers a basic barrier against oils and fats, custom variants are manufactured with precise control over parameters such as basis weight, porosity, tensile strength, and surface finish to meet the exact needs of a particular application. This customization is achieved through specialized pulping processes, refining techniques, and calendaring, resulting in a material with defined technical specifications for superior performance.Key Characteristics with Professional DataThe primary characteristic of custom greaseproof paper is its exceptional oil and grease resistance, typically measured by the Kit Test value. Custom papers can be designed to achieve specific Kit ratings, often exceeding 12 (on a scale where 12 indicates high resistance), ensuring no visible grease penetration for extended periods, which can be critical for packaging high-fat content foods. Its low porosity and high density are quantified by Gurley densometer readings, which can be customized to fall within a range of 100 to 1000 seconds for 100 ml of air, creating a formidable barrier that prevents the migration of lipids. The material exhibits remarkable heat resistance, withstanding temperatures up to 220°C (428°F) without degrading, melting, or releasing harmful

Food greaseproof paper, also called food-grade oil-resistant paper, is a specialized, food-safe material designed to resist the absorption and penetration of oils, fats, and liquids. It’s widely used in food preparation, storage, and serving—while complying with strict safety standards (such as FDA, EU 10/2011, or China’s GB 4806 series) to ensure no harmful substances leach into food, making it safe for direct contact with edible items.Core CharacteristicsIts utility comes from three key traits:Grease Resistance: This is its most important feature. It blocks oils (e.g., from fried foods like french fries, pastries, or burgers) from seeping through, preventing grease stains on hands, containers, or surfaces, and keeping food clean.Food Safety: It’s made from high-purity raw materials (usually wood pulp or plant-based fibers) and processed without toxic additives like heavy metals or harmful chemicals, meeting global food contact safety requirements.Partial Moisture Barrier: Unlike fully waterproof materials (such as plastic), it has mild moisture resistance. It can absorb minor condensation (e.g., from cold sandwiches) without getting soggy, or protect dry foods (like cookies) from humidity—though it can’t block large amounts of liquid.
How It Achieves Grease Resistance (Manufacturing Process)Its oil-resistant ability is created through two common processes, chosen based on intended use:Calendering (Uncoated Type): Raw wood pulp is pressed under high pressure and te

The Difference Between Baking Paper vs Greaseproof PaperIn the realm of culinary arts and food preparation, the terms "baking paper" and "greaseproof paper" are often used, sometimes interchangeably, yet they possess distinct characteristics and functionalities. These specialized papers are engineered to provide non-stick surfaces, heat resistance, and barrier properties, making them indispensable in both professional and domestic kitchens. Understanding their composition, properties, and optimal applications is crucial for achieving desired results in food preparation and packaging.Baking Paper (Parchment Paper)Baking paper, commonly known as parchment paper in some regions, is a cellulose-based paper that has been treated with a thin layer of silicone, typically on both sides. This treatment process, often involving a sulfuric acid bath or silicone coating, creates a non-porous, heat-resistant, and non-stick surface. The silicone coating, usually food-grade polydimethylsiloxane (PDMS), is applied at a density ranging from 0.5 to 1.5 grams per square meter (gsm) on each side. The base paper itself typically has a basis weight between 35 and 70 gsm, resulting in a final product weight of approximately 40 to 80 gsm.Key Technical Data for Baking Paper:Heat Resistance: Consistently withstands temperatures from -40°C to 220°C ( -40°F to 428°F), with some high-grade versions tolerating up to 250°C (482°F) for short periods.Caliper (Thickness): Typically ranges from 45 to 80

How to Choose Food Wrapping Paper Sheets?Food wrapping paper sheets are specialized, food-grade paper products designed for the primary purpose of wrapping, storing, and presenting various types of food. Unlike standard paper, these sheets are engineered with specific properties to ensure food safety, maintain freshness, and provide a barrier against external contaminants. They are a fundamental tool in both commercial food service and domestic kitchens, serving as a versatile interface between food and its environment.The core characteristics of food wrapping paper sheets are defined by a set of precise technical parameters. Key features include:Grease Resistance: High-performance food wrapping paper, such as butter paper or sandwich wrap, is treated to resist oil and grease penetration. This is quantitatively measured by the Kit Test, where papers achieving a rating of 5-12 (on a scale of 1-12, with 12 being highest) are considered effective. This prevents unsightly stains and maintains the paper's structural integrity.Moisture Barrier: Many sheets possess inherent or treated hydrophobic properties. The water vapor transmission rate (WVTR) can be as low as 5-20 g/m²/24h for wax-coated papers, creating a barrier that slows down moisture loss from baked goods or prevents moisture absorption by dry foods, thereby extending shelf life.Heat Resistance: Parchment paper sheets, a common subtype, are designed to withstand high oven temperatures, typically up to 220°C (428°F)

Greaseproof Baking Paper: A Comprehensive Technical OverviewWhat is Greaseproof Baking Paper?Greaseproof baking paper, also known as parchment paper, is a cellulose-based composite paper that undergoes a specialized chemical treatment process to achieve its non-stick and heat-resistant properties. The paper is produced through a supercalendering process where it is passed through a series of high-pressure rollers, compressing the fibers and creating a dense, smooth surface with a porosity rating of less than 5 mL/min (as measured by the Gurley densometer method). This treatment reduces pore size to approximately 1-10 micrometers, creating a barrier that prevents fats and oils from penetrating with an oil holdout rating of Kit 12 according to TAPPI T559 standards. The paper typically has a basis weight ranging from 35-40 g/m² and can withstand temperatures up to 220-230°C (428-446°F), with some silicone-coated variants rated for temperatures as high as 260°C (500°F). The surface tension of treated paper measures below 30 dynes/cm, creating the non-stick characteristic that provides a release coefficient of friction of approximately 0.2-0.3.
Key Characteristics with Technical DataThe exceptional performance characteristics of greaseproof baking paper are quantifiable through several precise measurements:Heat Resistance: Standard greaseproof paper maintains structural integrity at temperatures up to 220°C (428°F) for extended periods, with a melting point of approxima

Comprehensive Guide to Food Wrap Sheets: Properties, Applications, and MaintenanceFood wrap sheets, commonly referred to as wrapping films or food-grade flexible packaging materials, represent a critical component in modern food preservation, storage, and transportation systems. These specialized sheets are engineered from various polymer-based or natural materials to create a protective barrier between food products and the external environment. Their primary function is to extend shelf life, maintain quality, and ensure safety by preventing contamination, moisture loss, and oxidation. The evolution of these materials has been driven by advancements in polymer science, leading to the development of sheets with tailored properties for specific food types, from fresh produce to processed meats and baked goods.
Key Characteristics and Technical DataThe efficacy of food wrap sheets is quantified through a set of well-defined technical parameters. One of the most critical properties is Water Vapor Transmission Rate (WVTR), which measures the material's ability to resist moisture transfer. High-barrier polyethylene (PE) films, for instance, can exhibit a WVTR as low as 5-10 g/m²/24hr at 38°C and 90% relative humidity (RH), making them ideal for preventing dried foods from rehydrating or moist foods from drying out. Conversely, films for fresh produce are engineered with higher WVTR, often exceeding 1000 g/m²/24hr, to allow for necessary transpiration and prevent condens