XH-50E /K75 is a quick-drying two-component polyurethane dry-type composite adhesive. It is suitable for the lamination of thick layers of PE, etc., and is widely used in the interlayer lamination of food flexible packaging composite materials such as OPP, CPP, PE, PET, NY, AL and other substrates.

1. Overview:
XH-50E /K75 is a quick-drying two-component polyurethane dry-type composite adhesive. It is suitable for the lamination of thick layers of PE, etc., and is widely used in the interlayer lamination of food flexible packaging composite materials such as OPP, CPP, PE, PET, NY, AL and other substrates.  
Second, product features:
1. It has good adhesion to various film substrates, and is suitable for the compounding of thick layer materials, especially for some difficult-to-stick film substrates such as PVC, thick layer PE, etc. It has a better bonding effect;
2. Fast curing and short curing time, which can reduce the inventory of products in the curing process and form a rapid cycle of finished products;
3. With good initial adhesion and excellent peel strength, it is suitable for the compounding of rigid materials such as aluminum foil;
4. It has good temperature resistance, and has better adhesion and heat sealing performance to the multi-layer structure reinforced thick PE bottom film;
5. High transparency and brightness, good film-forming properties; good wetting and leveling properties, suitable for high and medium speed coating.
Three, product technical specifications：

4. Reference ratio:
Generally, XH-50E/K75=100/10-13; the user determines the formula ratio according to his own situation. If there is no special request, the company will provide it to the user according to the ratio of XH-50E//K75=100/11.
V. Dilution:
Ethyl acetate is generally used; the water content of the solvent is required to be less than 0.2%, and solvents containing active hydrogen such as alcohols and amines cannot be contained.

Note: The viscosity of the working solution with a specific concentration is measured at 25°C using a 3# Zahn cup.


6. Scope of application: General dry compounding.
Seven, coating method: Gravure coating.
VIII. Coating amount: 2.5-5g/m2 (dry basis), (depending on the post-processing, use and quality requirements of the film structure).
9. Temperature of composite roll: It is generally controlled at 50℃-80℃, and the film that is easily affected by temperature is controlled at 50℃-60℃.
10. Compounding roller pressure: Under the premise of not damaging the film, the compounding pressure should be increased as much as possible.
Eleven. Composite drying tunnel temperature: 50℃~60℃, 60℃~70℃, 70℃~80℃ (reference value)
12. Aging temperature: 40℃-50℃.
Thirteen, aging time:  More than 24-48 hours. Since the curing reaction rate of the two-component polyurethane adhesive varies with the air temperature, and the time required for the inner and outer layers of the roll film to reach the set curing temperature is also different, in the case of low temperature in winter and for larger rolls The curing time of the film and the multi-layer structure composite film containing AL should be appropriately extended to avoid the occurrence of abnormal quality phenomena such as heat-sealing curling, delamination and unevenness of the composite film due to incomplete curing and cross-linking of the two components of the adhesive.
Fourteen, SolidificationSpeedRate

 
15. Packing: Main  agent: 20kg/barrel
Curing agent: 2.2kg (can be packaged according to user requirements)
XVI.   Storage: This product is inflammable and explosive, and should be sealed and stored in a cool, ventilated and dry environment, and should not be placed in the open air; storage and transportation should pay attention to heat insulation, moisture-proof, fire-proof . The storage period is one year.

Notes:
 1. The ratio of the main agent and the curing agent, the user should adjust the main agent and curing agent according to the type of film, composite structure, printing conditions and climatic conditions (ambient temperature, humidity), etc. proportions are adjusted appropriately. In the climatic conditions of high temperature and high humidity, the user should increase the ratio of the curing agent by 5% on the original basis when the film printed with gravure ink containing a large amount of alcohol diluent and the nylon film substrate that is very easy to absorb moisture are laminated. ~About 10%.
2. The surface of the substrate to be bonded needs to be corona treated, clean and dry, free from dust and oil, among which, < /strong>The surface tension of PET shall not be lower than 42 dyne; when NY is used as the intermediate layer, it must be treated on both sides, and the surface tension shall not be lower than 50 dyne; the surface tension of OPP, CPP and PE shall not be lower than 38 dyne because.
3. The type of film additives, glue concentration, the depth of the anilox roll, and the number of lines have an impact on the bonding strength of the composite film, which should be selected before use.
4. In the process of compounding, attention should be paid to checking and controlling the viscosity of the adhesive; there should be enough coating amount and sufficient curing.
5. After opening the package, it must be used up in a short period of time, especially the curing agent is easy to absorb moisture and deteriorate, and it should be kept dry and sealed.
6. The formulated adhesiveshould be used up within 8 hours as much as possible. Ifit is found that the viscosity of the adhesive is obviously increased or appears cloudy, it should be stopped.
7. This product contains flammable solvents. Fireworks and static electricity are strictly prohibited.
8. The workplace should be ventilated and appropriate labor protection tools should be worn.
9. Please read the product safety instructions before use.

important hint:
The production process of the company's products is strictly monitored, and the products are subject to strict quality inspection. The above related product technical information is provided in good faith and for reference only. The specific use method of the product is determined by the user according to their own product requirements and production technical conditions, and the user is requested to conduct sufficient tests before use. Since the application, use and processing of our products are beyond our control, our company is not responsible for any adverse consequences caused by improper use by customers. If you have any questions, please call our customer service department for consultation, and the customer service department hotline：0760-88501510。

• Xinhui