Properties

* Mass ratio changes from 100: 50 to 100: 70 depending on the humidity and films.

Directions for use

• Ratio: The standard mass ratio 859A/hardener 859B = 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: 859A/Hardener 859B component has a pot life time of about 30-40 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 35 - 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 35- 45℃ for 24-48 hours, Aluminum foil composite products usually need to be cured at 45 ° C ~ 50 ° C for 36 ~ 48 hours, and the Al/CPP structure needs to appropriately increase the curing time of 48~60h in winter.
• 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.

Pot life

Figure1: 859A/ hardener 859B Standard proportioning pot life (45℃)

Typical Use Parameters

Glue container: 859A Summer 36-38℃ Winter 40-42℃

Hardener 859B Summer 34-37℃ Winter 40-42℃

Rubber hose: 859A Summer 38℃ Winter 40℃

Hardener 859B Summer 35℃ Winter 40℃

Metering roller: 35-38℃

Coating roller: 35-38℃

Pot life: about 25-40mins (after mixing)

Coating weight: 1.2-3.5 g/m²

Laminating temperature: 35-45℃

Laminating machine speed: 0-300 m/min

Curing time: 35-38℃/12-36h (60-70%RH)

FDA Compliance

859A/859B are 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: 859A/859B are 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 859A is valid for 12 months and the hardener 859B 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

859A:20 KG/bucket, Special requirement 200KG/Drum ; 859B:20 KG/bucket Special requirement 200KG/Drum ;

Notes

When using 859A/ hardener 859B 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 about 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:859B 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.