Hapco Inc. - liquid plastics and dispensing equipment manufacturer.

DIRECTIONS FOR USE

SURFACE PREPARATION TO PREVENT ADHESION:

To prevent adhesion to the mold, use a GREASE IT release agent. The following are recommended; GREASE IT II, GREASE IT IV, GREASE IT V, GREASE IT FDG, GREASE IT WAX P, or GREASE IT WAX L. For best results, apply in a few thin coats, drying between coats. Porous surfaces, i.e. wood, plaster, etc, must be sealed thoroughly before release is applied. Use multiple coats of a good coating, such as: a high grade lacquer or urethane lacquer.

Note: Silicone release agents and silicone rubber molds may adversely affect the HAPFLEX surface. It is up to the user to test the appropriateness and judge the above products for use with HAPFLEX.

SURFACE PREPARATION FOR ADHESION:

For applications where adhesion is desired, the surface must be cleaned, abraded and dried.

Sandblasting and mechanical roughing are the preferred ways of abrading surfaces to be bonded. For added adhesion to metals, use Primer 200, and for adhesion to plastic, use Primer 800. Make sure all surfaces are clean, dry and free from moisture.

MIXING:

IMPORTANT: Before each use, mix Part B thoroughly before proportioning out the required amount.
Components may separate and should be mixed before each use.
Mix, only when ready to use, by adding the curing agent to the resin portion and blending together thoroughly.
Be sure to scrape and stir in all material sticking to the sides and bottom of the mixing container.
Do not use paper containers or wooden mixing sticks. They may contain moisture.
For best results, use plastic or coated containers, and metal or plastic sticks.

COLD TEMPERATURES:

CAUTION - Part A may freeze or crystallize in cold temperatures. Part A may appear to be striated or solidify. This situation can easily be corrected. Place the cover on the Part A loosely (do not seal) and place in an oven set at 125-150°F (51-65°C) for 3-8 hours or 8-12 hours for drums. Reseal, allow to cool, and then mix thoroughly.

CAUTION - Part B may freeze or crystallize in cold temperatures. Part B may turn thicker, appear to be striated, thicken, or solidity. To prevent this see storage.

This situation can be easily corrected. To reverse crystallization, loosen the cover on Part B and heat to 170-180˚F (77-82˚C) for 3–6 hours, drums, 6–12 hours. Allow to cool before using. If contents are pigmented, mix thoroughly.

AIR RELEASE:

Use HAPCO’S ANTI-AIR to aid in air release (see Technical Bulletin). In some products, ANTI-AIR can cause a slight haze to cloudiness.
This has no effect on properties.

MACHINE MIXING AND DISPENSING:

Use HAPCO’S RAPIDFIL , MINIFIL and/or RAPIDSHOT Dispensing Equipment for fast, reliable, and efficient dispensing.

CASTING:

Pour in a thin unbroken stream into the lowest point in the cavity or mold. This will help break up some of the air entrapped during mixing.

SHRINKAGE:

Shrinkage or dimensional variation is largely influenced by 5 factors:

     1. Mass ( total volume and thickness)
     2. The temperature of the material
     3. Maximum temperature reached during the exotherm (reaction). The faster the material, the higher the exotherm, the greater the shrinkage.
     4. The temperature of the mold.
     5. The stability of the mold.

Geometry, part thickness, and total volume vary in each design, therefore, the customer is responsible to test and determine the shrinkage factor to be used. The values in the brochures are for comparative reference only, using ASTM testing procedures.

RESEALING:

Many polymers are moisture sensitive. Reseal using one of the following two (2) methods:
blanket with nitrogen or use a hairdryer for 30 seconds to cover with dry air.

STORAGE:

These polymer systems have a minimum shelf life of six months when unopened.
Both components should be stored in a room temperature, dry place.
When not in use, containers should be kept tightly closed.

CLEAN UP:

Cured polymers are most difficult to remove. It is best to clean tools and equipment immediately after use.

PRECAUTIONS:

Skin or eye contact with polymers should be avoided. Clean housekeeping procedures are urged and the use of gloves and/or protective creams suggested. All polymers, as a general practice, should be used in well-ventilated areas. Spot ventilation is most effective. Contaminated clothing should be removed immediately and the skin washed with soap and water or waterless skin cleaner. Should accidental eye contact occur, wash thoroughly with water and consult a physician.