What are the quality standards for small rolls of thermal label paper?

The quality standard of small roll thermal label paper involves many aspects, including appearance quality, size specifications, physical properties, and chemical properties. The following is a detailed explanation of these standards:

First, appearance quality

1.Pattern and text clarity: thermal label paper should have clear patterns and text, without obvious defects such as bubbles, impurities, color differences, creases, etc.

2.Surface flatness: The surface of the thermal paper should be smooth and smooth, without bumps, depressions, coating peeling and other phenomena. At the same time, the edge of the thermal paper should be cut neatly, without burring.

3.Color uniformity: the color of the thermal paper should be uniform, and there should be no obvious color difference or color deviation.

Second, size specifications

1.Dimensional accuracy: The size of the thermal label paper should meet the design requirements, and the error usually should not exceed a certain range (such as ±1mm). The ratio of length to width should also meet the design requirements, and the error should be controlled within a reasonable range (such as ±5%).

2.Width and length: For small rolls of thermal paper, the width is less than or equal to 300mm, and the length is less than or equal to 1000m. The width deviation should not exceed a specific value (such as ±1mm), and a reasonable shortfall in length is allowed (such as no more than 2.0%).

Third, physical properties

1.Thickness: The thickness of the thermal label paper should meet the design requirements, and the error usually should not exceed ±5%. The thickness can be measured using a micrometer or thickness gauge.

2.Tightness and roughness: The tightness and roughness of thermal paper are also important physical performance indicators, respectively, according to GB/T451.3 and GB/T22363-2008 printed surface method to determine.

3.Tensile strength, tear: These indicators reflect the mechanical strength of the thermal paper, according to GB/T12914 and GB/T455 determination.

Fourth, chemical properties

1.Thermal reaction performance: including static color performance and dynamic color performance. The thermal reaction performance of the paper was evaluated by observing the color change and peeling of the coating after heating.

2.Image preservation performance: Evaluate the retention ability of the printed image of the thermal label paper in a certain period of time to ensure that the image is not easy to fade or blur.

3.Harmful substances content: such as bisphenol A content and other harmful substances should be controlled within the safe range, according to GB/T 34455 determination.

Fifth, other requirements

1.Packaging and marking: The packaging of small roll thermal paper should be marked with product name, specification, product type, implementation standard number, manufacturer name, factory address, batch number or production date, shelf life and inspection mark. Packaging materials should be moisture-proof to protect product quality.

2.Transportation and storage: During transportation, covered and clean transport vehicles should be used to prevent heavy pressure, mutual friction and impact, as well as sun and rain and pollution. When loading and unloading, the thermal paper should not be dropped from a height. Storage should be stored in room temperature, dry, ventilated and clean environment, to prevent the product from direct sunlight or moisture.

In summary, the quality standard of small roll thermal label paper involves many aspects, from appearance quality to physical properties, chemical properties, packaging and identification, and so on have strict requirements. These standards are designed to ensure that the thermal label paper can meet the various needs of customers during use, and to guarantee its quality and safety.