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In order to thoroughly implement the important instruction spirit of the practice on the construction of production workers, skill power and safety production, and solidly do a good job in the 23rd national "safety production Month" activities, Xinhui employees are guided to actively tree safety development concept, and constantly improve safety awareness and safety skills. Xinhui Company held the "Xinhui Chemical 2024 Safety Skills PK Competition" on the afternoon of June 29. The safety skills...
Can polyurethane laminating adhesive be used for packaging oily foods?
Polyurethane laminating adhesive can be used for packaging of oily foods, and it is currently the mainstream choice in the lamination process of food flexible packaging. It is widely applied in the production of packaging for oily foods such as fried snacks, nuts, meat products, and sauces. Compared with ordinary adhesives, polyurethane adhesive has excellent oil resistance, bonding strength and chemical stability. It can effectively resist the penetration and erosion of oil, avoiding problems...
The influence of solvents on the flexible packaging polyurethane laminating adhesive
Solvents are the core auxiliary components of the flexible packaging polyurethane laminating adhesive, directly influencing the coating performance of the adhesive, the curing effect, and the quality of the composite product. They are the key factors in controlling product quality in the dry lamination process of flexible packaging. Polyurethane laminating adhesives for flexible packaging are often used in combination with inert solvents such as ethyl acetate. The purity, evaporation rate, and...
Factors related to solvent residue after using flexible packaging polyurethane laminating adhesive
The residual solvents in flexible packaging are mainly influenced by several factors. Here are some common factors: 1.The Influence of Compound Speed Similar to the principle that printing speed affects the amount of solvent residue, the lamination speed is also a factor influencing the amount of solvent residue. Therefore, during production, the lamination speed should be reasonably set according to the drying capacity of the oven. 2. Influence of Laminating Adhesive Application...
The seven key functional features of flexible packaging polyurethane laminating adhesives
Flexible packaging polyurethane laminating adhesives are the core lamination materials in the fields of food, daily chemicals, and medicine packaging. With their unique molecular structure advantages, they possess seven core functional features, which are suitable for the efficient, safe, and durable production requirements of modern flexible packaging. 1. Excellent bonding performance, highly compatible with various flexible packaging substrates such as plastics and aluminum films. It has...
The media resistance of flexible packaging polyurethane laminating adhesives
Flexible packaging polyurethane laminating adhesives are the core materials for lamination film processing. Their resistance to various media directly determines the structural stability and service life of packaging products during storage and use, and are the key indicators for evaluating the comprehensive performance of adhesives. Flexible packaging often comes into contact with complex media such as oils, acids and bases, food ingredients, chemical auxiliaries, and electrolytes. It is prone...
Analysis of the Flash Point of Flexible Packaging Polyurethane Laminating Adhesive
Flash point is the core safety indicator for evaluating the flammable and explosive characteristics of flexible packaging polyurethane laminating adhesive. It is also an important basis for safety control during the production, storage, and coating application of the adhesive. It directly affects the safety production norms of the flexible packaging composite production line. The industry measures the flash point of adhesives according to the GB/T 30777 closed cup method, and in combination...
The application method of flexible packaging polyurethane laminating adhesives
Flexible packaging polyurethane laminating adhesives are the core materials for film lamination. The coating method directly determines the bonding uniformity, appearance quality and performance of the composite products. The mainstream coating methods in the industry include mesh roller coating, scraper coating and differential kiss coating, which are suitable for different production processes and product requirements. The screen roller coating method is the most commonly used technique in...
Curing of flxible packaging polyurethane laminating adhesive
The curing process of the flexible packaging polyurethane laminating adhesive is the core step in the lamination production process. Its essence is to achieve molecular cross-linking through chemical reactions, transforming the liquid adhesive layer into a high-strength and high-toughness solid adhesive film. This directly determines the bonding strength, temperature resistance and sealing performance of the flexible packaging composite film, and is widely used in lamination scenarios involving...
Why do the curing temperatures of flexible packaging polyurethane laminating adhesives vary?
Polyurethane laminating adhesives are the core bonding materials for dry and solvent-free laminating in flexible packaging. For different models and usage scenarios, the optimal curing and aging temperatures of these adhesives vary significantly. The conventional range covers 40℃ - 60℃, while special adhesives even require higher temperatures. This difference is mainly determined by four factors: the formulation system, the composite substrate, the product application, and the external...
Polyurethane laminating adhesive is the core supporting material for the lamination of flexible packaging films. Relying on the action of amine carbamate bonds and hydrogen bonds in the molecular chain, it can achieve high-strength composites of different substrates such as plastic films, aluminum foil, and paper, and is widely used in the flexible packaging fields of food, medicine, and daily chemicals. It is a key material for ensuring the stability of the interlayer composite of...
The five key features of flexible packaging polyurethane laminating adhesive
In the production of flexible packaging composites such as food, daily necessities, and medicine, polyurethane laminating adhesives are the mainstream composite adhesives in the industry. Due to their unique molecular structure advantages, they are suitable for various film lamination processes. Compared with ordinary water-based adhesives and chloroprene adhesives, they have significant advantages. The core features include five aspects, which fully meet the production and usage requirements...
With the rapid development of industries such as food, medicine, and daily chemicals, multi-layer laminated flexible packaging has taken the dominant position in the packaging market due to its advantages of lightness, preservation, and light-blocking. In the flexible packaging lamination process, adhesives are the key raw materials that determine the firmness between packaging layers, the safety for use, and the service life. Nowadays, polyurethane laminating adhesives, with their...
A Brief Analysis of the Initial Adhesion of Flexible Packaging Polyurethane Laminating Adhesives
The initial adhesion force is the core performance indicator of polyurethane laminating adhesives for flexible packaging. It refers to the initial adhesive ability of the adhesive to quickly adhere and fix the film substrate after being coated and laminated, without the need for continuous external pressure for a short period of time. It directly determines the stability of the flexible packaging laminating process and the qualification rate of the finished products, and is a key parameter that...
Polyurethane laminating adhesives are the core materials in the flexible packaging laminating process. According to the formulation system, they can be divided into solvent-based and solvent-free types. These two types differ significantly in composition, process, environmental friendliness, performance during use, and cost, and are suitable for different requirements of flexible packaging production. In terms of composition and solid content, solvent-based adhesives use ethyl acetate as the...
Analysis of the Peel Strength of Flexible Packaging Polyurethane Laminating Adhesive
Peel strength is the core indicator for evaluating the reliability of adhesion in flexible packaging composite films. It directly determines the sealing performance, weather resistance and service life of polyurethane laminating adhesive composite products, and is widely used in flexible packaging fields such as food, cosmetics and medicine. The higher the peel strength value, the stronger the interlayer bonding force of the lamination film, and the less likely the packaging is to have quality...
Reasons why flexible packaging polyurethane laminating adhesive can not be mixed at will
Flexible packaging polyurethane laminating adhesives are the core materials in laminated packaging production. Many people mistakenly believe that similar polyurethane laminating adhesives have similar properties and can be mixed at will. However, in fact, there are significant quality risks involved. Different models and brands of adhesives must not be mixed at will. The first issue is the incompatibility of chemical formulations. The resin structures, active groups, and additive ratios of...
The flexible packaging polyurethane laminating adhesives are classified into three types based on production line speed: low-speed, medium-speed, and high-speed composite. They are suitable for different production capacities, adhesive types, and production requirements, and have significant differences in process characteristics. The low-speed lamination line speed is generally ≤ 80m/min, mostly for small dry lamination machines, suitable for general-purpose solvent-based PU adhesive. The...
Flexible packaging polyurethane laminating adhesive is the core material for the production of composite packaging in industries such as food and daily chemicals. The stability of adhesion directly determines the quality of the packaging products. During practical operations, by controlling the four key aspects well, common problems such as delamination, stickiness, and odors can be effectively avoided, ensuring the qualified rate of production. 1. Surface treatment of the substrate. Before...
Analysis on Weather Resistance of Flexible Packaging Polyurethane Laminating Adhesive
Flexible packaging polyurethane laminating adhesive is the core material of food, daily chemical and outdoor packaging lamination molding, and its weatherability directly determines the service life and stability of lamination film, which is the key index to measure the comprehensive quality of adhesive. When packaging is stored, transported and used outdoors, it is often affected by ultraviolet radiation, alternating temperature and humidity, damp-heat aging and other environmental factors,...
Polyurethane laminating adhesive is a commonly used bonding material. It has strong adhesion and quick curing properties. If it accidentally comes into contact with the skin, do not panic. Mastering the correct handling method can effectively prevent skin irritation, redness, swelling and allergic reactions. If adhesive gets on your skin, you need to deal with it immediately. Before the adhesive has fully dried, quickly use a clean cloth or tissue to gently wipe away the excess adhesive from...
Before using the polyurethane laminating adhesive, it is necessary to conduct a preliminary test.
Before using the flexible packaging polyurethane laminating adhesive, a pre-test must be conducted. This is a crucial process in ensuring product quality, avoiding production risks, and meeting industry standards in the flexible packaging composite production. It is by no means an optional step. Even if the adhesive parameters meet the factory standards, it cannot be directly put into mass production. The production of flexible packaging is influenced by multiple factors such as the...
Why do the curing times of different flexible packaging polyurethane laminating adhesives vary?
The curing process of flexible packaging polyurethane laminating adhesives is essentially a process where isocyanates and hydroxyl groups undergo cross-linking reactions to form a dense adhesive layer. The curing times of different adhesives on the market vary significantly, and the core reason lies in the multiple influences of the formulation system, ratio, and environmental conditions. The formulation of the adhesive itself is the core influencing factor. Different products use different...
Flexible packaging polyurethane laminating adhesives are classified into several major categories.
Flexible packaging polyurethane laminating adhesives are key materials in the production of flexible packaging lamination. Due to their excellent flexibility, high bonding strength, and wide adaptability to substrates, they are widely used in packaging fields such as food, medicine, and cosmetics. According to the solvent system, formulation structure, and construction characteristics, the industry mainstream classifies them into three major categories: solvent-based, non-solvent-based, and...
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.