858A 858B Two-Component Solventless Adhesive Flexible Packaging Adhesive Saving Time & Cost Used In The Lamination Of Plastic/Plastic, Plastic/Aluminum, Aluminized Film And Other Material Structures
Brand Name:Weeton
Certification:FDA 175.105
Model Number:858A/858B
Minimum Order Quantity:200KG
Delivery Time:7-15days
Payment Terms:T/T,L/C
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Shanghai Shanghai
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No. 251, Wenji Road, Songjiang District, Shanghai China
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Product Details
Weeton 858A/858B is a two-component solvent-free flexible packaging laminating adhesive that is widely used in the lamination of plastic/plastic, plastic/aluminum, aluminized film, and other material structures. Characterized by high peel strength, excellent surface wettability, and excellent heat resistance. It has excellent disk life and excellent performance of fast curing, saving curing time and cost.
858A/ hardener 858B two-component solvent-free adhesive has medium viscosity and excellent wetting performance, which meets the requirements of high-speed laminating (0 - 300 m / min). 858A/ hardener 858B does not affect the openness of the inner layer of the composite film, does not contain castor oil components, the adhesive layer is transparent after curing, odorless, elastic, and resistant to aging.
The typical applicable structure is as follows +:
- OPP/PET/PE
- OPP/VMPET/PE(CPP)
- OPP / CPP ( PE)
- PA/PE; AI/PE
- OPP/CPP, VMPET, VMCPP
+: Film should get appropriate surface tension by corona treatment
Properties
| Product Name | 858A 858B | |
| Component | Isocyanate component Hydroxyl component | |
| Mixing Ratio | 100:60* (mass ratio) | |
| Solids Content | 100% 100% | |
| Viscosity | 1,000-1,800mPa.s (Brookfield LVT,25°C) | 1,200-2,200mPa.s (Brookfield LVT, 25°C) |
| Color | Colorless to light yellow transparent Colorless to light yellow transparent | |
| Density | 1.10±0.05 g/cm3 1.10±0.05 g/cm3 | |
* Mass ratio changes from 100: 50 to 100: 70 depending on the humidity and films.
Directions for use
- Ratio: The standard mass ratio 858A/hardener 858B = 100: 60 can be fine-tuned according to the properties of the product, the ink, the packaging material, and the operating conditions.
- Mix method: Mix by automatic mixing machine, mix evenly before use.
- Coating system temperature setting: Recommended mixing and coating operating temperature parameters are shown in the "Typical Use Parameters column" and can be adjusted according to the actual conditions of use.
- Coating: Suitable for specialized laminating equipment with multi-roll coating systems.
- Coating weight: Depending on the combination of plastic film or aluminum foil and the end use of the laminated film, the coating amount of the adhesive can range from 1.2 to 2.5 g / m2. Usually, for printed film lamination, the coating amount needs to be increased appropriately when the structure is AI/CPP.
- Adding: Use a two-component dosing and mixing unit to add the adhesive continuously to the adhesive tank of the solvent-free laminator. The adhesive in the tank should be kept as fresh as possible to avoid abnormal viscosity affecting the coating result.
- Pot life: 858A/Hardener 858B component has a pot life time of about 40-50 minutes at 45°C after mixing and shows reliable workability. See Figure 1 below.
- Laminating conditions: Precise tension control and proper winding procedures prevent delamination, roll head size difference, and film curl.
- Curing: Cure at 38 - 45℃ for 12-24h for rewinding and slitting. For three-layer laminates, the second layer of raw material is laminated and then cured for 6-12 hours before the third layer is laminated. Laminates are usually cured at 38- 45℃ for 24-48 hours.
- Cleaning: When the machine is shut down for more than 30 minutes, the metering roll position adhesive can no longer be used and the coating unit needs to be cleaned with a solvent/plasticizer mixture (refer to Safety Precautions). The two-roller coating unit also needs to be cleaned and the same cleaning procedure should be carried out at the end of the start-up period.
- Bonding data performance test: in a variety of plastic/plastic, plastic/aluminum composite processes show excellent bonding performance.
Pot life
Figure1: 858A/ hardener 858B Standard proportioning 100:60 pot life (45℃)
Typical Use Parameters
Glue container: 858A Summer 36-38℃ Winter 40-42℃
Hardener 858B Summer 34-37℃ Winter 40-42℃
Rubber hose: 858A Summer 38℃ Winter 40℃
Hardener 858B Summer 35℃ Winter 40℃
Metering roller: 35-38℃
Coating roller: 35-38℃
Pot life: about 40-50mins (after mixing)
Coating weight: 1.2-3.5 g/m2
Laminating temperature: 35-40℃
Laminating machine speed: 0-300 m/min
Curing time: 35-38℃/12-36h (60-70%RH)
FDA Compliance
858A/858B is suitable for laminating food packaging materials in accordance with US FDA 175.105 and Chinese GB- 9685. After sizing, the fully cured adhesive material complies with the EU 2002/72/EC and its Supplementary Agreement 2004/19/EC on the restriction of migration of certain substances.
Storage & Transport
Storage: 858A/858B is recommended to be stored in a cool and dry place, away from sunlight and high temperatures. When unopened it should be stored in the original closed container. The main agent 858A is valid for 12 months and the hardener 858B for 12 months. Open the storage container, after use should be re-covered and sealed, and the rest of the product should be used up within a short period of time.
Transport: Please refer to the relevant MSDS for details.
Packaging specifications
858A:20 KG/bucket, Special requirement 200KG/Drum ; 858B:20 KG/bucket Special requirement 200KG/Drum ;
Notes
When using 858A/ hardener 858B an efficient exhaust hood should be installed on the coating unit for safety reasons. The exhaust efficiency has to be checked prior to production by gas analysis for isocyanate concentration in the air. Safety regulations with regard to the handling of isocyanates have to be followed as per the guidelines issued by the International Isocyanates Institute. Please also refer to the local safety instructions as well as our safety data sheet and contact Huitian for analytical support.
Special Note: 858B In cold winter, there will be small lumps is a normal phenomenon, before use in the drying room preheating can be melted or in the dosing tank can be melted, which does not affect the use.
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858A 858B Two-Component Solventless Adhesive Flexible Packaging Adhesive Saving Time & Cost Used In The Lamination Of Plastic/Plastic, Plastic/Aluminum, Aluminized Film And Other Material Structures
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