The difference between copperplate paper and regular paper in adhesive materials
The main difference between copperplate paper and regular paper in adhesive materials is their different uses, weights, and appearances. Simply put, the difference between the two is that copperplate paper has adhesive on both sides, while regular paper does not. The original paper that is similar to copperplate paper is uncoated copperplate paper
The actual difference between copperplate paper and regular paper in stickers
1、 The weight varies, with copperplate paper weighing around 100-450 grams and regular paper weighing around 180-300 grams
2、 The appearance is different, and the flatness and milky white color of copperplate paper are higher; The demand for regular paper is not that high
3、 The main uses are different. Copperplate paper is mainly used for printing color pages, advertising, packaging, etc. Copperplate paper has a unique coating that can package and print vibrant colors, while regular paper is generally used for book printing
4、 The processing technology is different. Copperplate paper is made by using bleached chemical wood pulp or partially bleached chemical straw pulp on a paper machine. Writing paper is made from bleached chemical paper pulp as raw material, copied by a long or round net machine, and polished
What is UL/CSA certification for adhesive materials?
What is UL/CSA certification for adhesive materials? What issues should be noted when printing
1. DUL/CSA label. Certified labels refer to label products that can withstand special conditions and ensure absolute information security on the label, such as installation instructions, power data, warning symbols, caution symbols, etc. The information on the label will involve the safety of the final product, requiring that this information be identifiable for a long time and retained on the product for a long time
2. UL/CSA label materials. UL/CSA label material certification refers to the quality certification of products produced by label material manufacturers, including the surface material of blank labels, point bonding for composite use, and surface composite materials. The processed label materials are sold in roll form to label processors for label production. When label processors use ULL/CSA label materials, they can receive discounts on the transfer of certified materials from the material manufacturer, and can directly produce UL/CSA certified label products using such materials
3. UL/(SA Ink. Ink is part of UL/CSA labels. The ink used by label processors is specified in the manual developed by ULCSA. Only these specific oils # can be used to print UL/CSA certified labels. Generally, material manufacturers must undergo UL/CSA testing for the ink used in certified materials and recommend qualified ink to label processors for reference. Label processors can use the ink recommended by tui and matching materials to directly organize production.
4. UL/CSA label processor. ULCSA label processor refers to a label processor that is qualified to produce one or several UL/CSA label products. The information of UL/CSA label manufacturers can be found in the corresponding manuals< br/>
The labels produced by ordinary label processors using UL/CSA certified materials and inks are not UL/CSA labels. Because the first regular label processor does not have the qualification to produce UL/CSA labels; Secondly, the materials and inks used may not necessarily match, and processors can purchase the above materials from different suppliers, such as printing materials and laminating materials purchased from both sources
UL/CSA label manufacturer. Obtaining UL/CSA label processing qualification means that the processor submits the certification documents of certified materials, inks, etc., as well as the label products printed using them, to the relevant UL/CSA agencies and submits an application. After passing the UI/CSA inspection, a production and processing qualification certificate for a certain label product will be issued to it. Label processors will use these materials to produce UL/CSA labels for customers on a fixed basis
Is it appropriate to use PP synthetic paper adhesive material for chemical drum labels?
PP synthetic paper adhesive material&dash& mdash; Many products in the chemical industry use chemical drums, such as lubricants, cleaning agents, paints, etc. Common chemical drums include plastic chemical drums and metal chemical drums. The label stickers attached to chemical drums are called chemical drum labels, also known as plastic chemical drums, iron drums, or metal chemical drums. We categorize the labels used on chemical drums into three types
Category 1: Plastic chemical drums
It is a plastic bucket, box, bottle or cylinder made by blow molding or injection molding. The label paper attached to this plastic chemical drum is usually synthetic paper, which can be waterproof. It is not recommended to use copperplate paper. Note that if it is a small-diameter plastic bottle, the requirements will be higher because the veneer is curved and has a smaller surface area, unlike the synthetic paper labels used for large plastic barrels
The second category: metal chemical barrels
For example, petroleum and industrial paints. This metal chemical bucket has labels for PP synthetic paper and PET synthetic paper. If there is oil stains on the surface of the chemical drum, a strong adhesive oil resistant label is required
Category 3: Many people believe that there are still glass barrels
In fact, chemical products often use small glass bottles, but there are almost no large glass bottles or jars because they are fragile. What I want to talk about is the third type of chemical barrel, which is actually a chemical barrel with colored GHS compliance labels attached. It could be plastic or metal. Mainly because these products use dangerous products and cannot be treated like ordinary chemical products. The color GHS qualified label has its own standards, with fixed specifications, sizes, and colors that cannot be modified by any manufacturer. In addition to waterproofing, it should also prevent sunlight aging and acid-base corrosion. It can be displayed normally after long-term immersion in seawater environment
How are adhesive materials classified?
Why are there different types of adhesive materials, such as laminated paper, removable adhesive, and permanent adhesive? How are they classified? In fact, there are multiple classification methods for adhesive materials, and people also have different names during use. The commonly used classification methods include the following:
1. Classify according to the characteristics of the adhesive
Divided into permanent adhesive materials and removable adhesive materials
2. Classified by adhesive coating technology
Divided into hot melt adhesive materials, solvent adhesive materials, and emulsion adhesive materials
3. Classify according to the chemical properties of the adhesive
There are two types of adhesive materials: rubber based and acrylic based
4. Classification of interface material characteristics
Divided into paper adhesive materials, film adhesive materials, and special adhesive materials
5. Classify according to the characteristics of the base paper
There are three types of adhesive materials: opaque base paper (thick base paper), semi transparent base paper (thin base paper), and transparent base paper
What are the characteristics of adhesives in adhesive materials?
The performance of pressure-sensitive adhesives for adhesive materials can be measured through a series of physical tests, such as measuring the strength and durability of the adhesive by changing external conditions. Typical adhesive properties include the following
1. Initial viscosity
When the adhesive on the label comes into contact with the substrate under slight pressure, the adhesive's adhesion to the substrate is called the initial adhesion of the adhesive, also known as the initial viscosity. Labels with high initial viscosity immediately produce strong adhesion when in contact with the substrate, and removing the label requires a certain amount of force; Labels with low initial viscosity exhibit minimal adhesion when in contact with the substrate surface, making them easy to remove
2. Final viscosity
The maximum adhesion that the label can obtain after the adhesive penetrates the surface of the substrate is called the final viscosity. The time to obtain the final viscosity with maximum viscosity depends on the strength of the adhesive, the roughness of the substrate surface, and the ambient temperature. The maximum time obtained after labeling is 2-24 hours. Generally speaking, there is no correlation between initial viscosity and final viscosity, and sometimes a label with a high initial viscosity may not ultimately achieve a high final viscosity
3. Shear strength (adhesive strength)
It is a measurement of the cohesive force of adhesive, indicating the softness of the adhesive. Low shear strength allows the adhesive to have a greater tendency to flow (resulting in high initial viscosity), requiring greater tensile force when separating the label from the substrate. When the adhesive has a high bonding strength, it is easy to separate the label from the substrate due to its high cohesion (which may result in lower initial viscosity), without the need for significant force
The fluidity of the adhesive not only affects its initial viscosity, but also determines the adhesive leakage around the label. Due to the infiltration of adhesive materials, it can also affect a series of problems in printing processing, such as pollution adhesion, poor paper feeding, and double sheet technology issues. Therefore, the fluidity of adhesives must be controlled within a certain range
4. UV resistance
It measures the ability of adhesives to maintain their adhesive strength and change color under ultraviolet light irradiation
5. Solvent resistance
It refers to the ability of adhesives to be applied in environments with solvents without reducing their bonding properties. These solvents include water, alcohol, solvents in petrochemical products, organic solvents, plasticizers, etc., which exist in the application environment of the label or on some substrate surfaces
6. Cold flow capability
It refers to the flow ability of the adhesive below normal temperature. Adhesives with good cold flow ability are called low-temperature or universal adhesives
7. Minimum labeling temperature
The lowest temperature on the surface of the substrate, provided that the adhesive does not lose its function. The minimum labeling temperature is determined by the adhesive; Glass transition point; To confirm. Below the transition point, the adhesive gradually hardens and crystallizes as the temperature decreases, becoming a solid. The minimum labeling humidity for ordinary acrylic adhesives is 10 ℃, and the minimum labeling temperature for rubber based adhesives is -25C
8. Application temperature range
The temperature range within which the adhesive reaches its maximum bonding strength without changing its properties after label use. For acrylic adhesives, their application temperature range is between -20-120 ℃, while rubber based adhesives are between -40~80 ℃. The application temperature range is related to the type of label fabric, substrate surface condition, and environmental conditions. Different adhesives have different application temperature range indicators
