Adhesives #6739920

EVA 28025 - LG is manufactured by Dow autoclave high pressure process and designed for variety hot melt adhesive application. EVA 28025 - LG is well known for its excellent adhesive property, mixing property with other raw materials and high quality assurance.

LORD Chemlok 205 adhesive is a heat-activated adhesive designed for use as a substrate primer under other Chemlok covercoat adhesives, or as a one-coat adhesive for bonding unvulcanized nitrile elastomer compounds. It is composed of a mixture of polymers, organic compounds and mineral fillers dissolved or dispersed in an organic solvent system

Features and Benefits

• Versatile can be used as a primer under a wide variety of Chemlok covercoat adhesives such as the Chemlok 220 series, Chemlok 230 series, Chemlok 250 series or Chemlok 6000 series adhesives.
• Convenient can be used as a one-coat adhesive to bond some nitrile rubber compounds to rigid substrates during vulcanization.
• Easy to Apply applies easily by brush, dip, spray or roll coat methods; suitable for existing production lines.
• Durable provides rubber tearing bonds and excellent environmental resistance when used in combination with Chemlok covercoat adhesives.

Application
Surface Preparation - Thoroughly clean metal surfaces prior to adhesive application. Remove protective oils, cutting oils and greases by solvent degreasing or alkaline cleaning. Remove rust, scale or oxide coatings by suitable chemical or mechanical cleaning methods.

• Chemical Cleaning - Chemical treatments are readily adapted to auto-mated metal treatment and adhesive application lines. Chemical treatments are also used on metal parts that would be distorted by blast cleaning or where tight tolerances must be maintained. Phos-phatizing is a commonly used chemical treatment for steel, while conversion coatings are commonly used for aluminum.
• Mechanical Cleaning - Grit blasting is the most widely used method of mechanical cleaning. However machining, grinding or wire brushing can be sed. Use steel grit to blast clean steel, cast iron and other ferrous metals. Use aluminum oxide, sand or other nonferrous grit to blast clean stainless steel, aluminum, brass, zinc and other nonferrous metals.

For further detailed information on surface preparation of specific substrates, refer to Chemlok Adhesives appli-cation guide. Handle clean metal surfaces with clean gloves to avoid contamination with skin oils.
Apply Chemlok 205 adhesive to stainless steel, aluminum, brass or other nonferrous substrates within one-half hour after cleaning. For ferrous substrates such as steel, a longer layover can be tolerated if no rust is formed.

Mixing Thoroughly stir adhesive before use, and agitate sufficiently during use to keep dispersed solids uniformly suspended.
Chemlok 205 adhesive is normally used full strength for brush, dip and roll coat applications. For spray application, dilute adhesive to a Zahn Cup #2 viscosity of 18-20 seconds. Chemlok 205 adhesive may be diluted with ketone-type solvents such as MEK and MIBK without adverse effects on handling and application. The diluent must be slowly added to the adhesive while stirring. Careful attention should be given to agitation since dilution will accelerate settling. Refer to the Chemlok Adhesives application guide for further information.

Applying Apply adhesive by brush, dip, roll coat, spray or any method that gives a uniform coating and avoids excessive runs or tears.Normally the dry film thickness of Chemlok 205 adhe-sive should be 5.1-10.2 micron (0.2-0.4 mil). When using Chemlok 205 adhesive over grit blasted substrates, when using it in conjunction with Chemlok 220 series covercoats or when using Chemlok 205 adhesive as a nitrile adhesive, apply a dry film thickness at the high end of the range. For all other applications (i.e., swaging or smooth substrates), apply Chemlok 205 adhesive at the low end of the film thickness range.

Drying/Curing Thoroughly dry parts coated with Chemlok 205 adhesive before applying the covercoat adhesive. This will take approximately 30-45 minutes at room temperature. It is best to use temperatures of 65-93C (150-200F) and abundant circulating air; however, forced air drying is possible at temperatures up to 149C (300F) for short periods of time. Maximum air flow at minimum temperatures will give the best results. After parts have dried, apply Chemlok covercoats using similar application methods.
Dried films of Chemlok 205 adhesive are non-tacky; therefore, coated parts may be piled into tote pans for subsequent processing. Wear clean gloves when handling coated parts and cover the tote pans to prevent contamination by dirt, grease, oil, etc. If coated parts are properly protected, they can be stored for at least one month before applying covercoat or bonding.

Chemlok 205 adhesive can be used to bond nitrile rubber by compression, transfer, injection or other molding procedures used to make bonded parts. As with other Chemlok adhesives, maximum adhesion is obtained when the rubber has completely cured. Ideal bonding conditions exist when both the adhesive and the rubber cure at the same time. To accomplish this, load the adhesive coated metal parts in the mold and quickly fill the cavity with rubber.
Dry films of Chemlok 205 adhesive remain firm at molding temperatures. During transfer or injection molding operations, the adhesive shows minimal tendency to wipe or sweep. During multiple-cavity loading, the prebaking begins with the first loaded metal parts. Keep mold loading cycles to a minimum to prevent adhesive and rubber from pre-curing. However, Chemlok 205 adhesive will resist moderate prebaking times without affecting bond performance. Transfer or injection molds need properly designed runners and sprues, as well as adequate pressures. This prevents rubber pre-curing before the mold cavities are completely filled.

Cleanup Clean areas with a rag as soon as possible using MEK.

Cautionary Information

• Before using this or any LORD product, refer to the Safety Data Sheet (SDS) and label for safe use and handling instructions.
• For industrial/commercial use only. Must be applied by trained personnel only. Not to be used in household applications. Not for consumer use.

LORD Chemlok® 220 adhesive is a covercoat adhesive designed for use over Chemlok 205 primer. This adhesive system will bond a wide variety of elastomers such as natural rubber (NR), styrene-butadiene (SBR), polychloroprene (CR), nitrile (NBR) and polyisoprene (IR) to various metals and other rigid substrates during vulcanization of the elastomer. It is composed of a mixture of polymers, organic compounds and mineral fillers dissolved or dispersed in an organic solvent system. Shelf Life Shelf life is two years from date of shipment when stored at 21-27°C (70-80°F) in original, unopened container. Do not store or use near heat, sparks or open flame.

Features and Benefits

• Versatile – bonds a variety of elastomers and metals when used in combination with Chemlok 205 primer.
• Environmentally Resistant – provides superior resistance to heat, water, salt spray, chemicals, oils, solvents and corrosive atmospheres.
• Easy to Apply – applies easily by dip, spray or brush methods.

Application

• Surface Preparation – Thoroughly clean metal surfaces prior to adhesive application. Remove protective oils, cutting oils and greases by solvent degreasing or alkaline cleaning. Remove rust, scale or oxide coatings by suitable chemical or mechanical cleaning methods.
• Chemical Cleaning - Chemical treatments are readily adapted to automated metal treatment and adhesive application lines. Chemical treatments are also used on metal parts that would be distorted by blast cleaning or where tight tolerances must be maintained. Phosphatizing is a commonly used chemical treatment for steel, while conversion coatings are commonly used for aluminum.
• Mechanical Cleaning - Grit blasting is the most widely used method of mechanical cleaning. However machining, grinding or wire brushing can be used. Use steel grit to blast clean steel, cast iron and other ferrous metals. Use aluminum oxide, sand or other nonferrous grit to blast clean stainless steel, aluminum, brass, zinc and other nonferrous metals.

For further detailed information on surface preparation of specific substrates, refer to Chemlok Adhesives appli-cation guide. Handle clean metal surfaces with clean gloves to avoid contamination with skin oils.