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Hot Melt Adhesives
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APAO-based hot melt adhesives, good for packaging, assembling and converting; Excellent adhesion for bonding PP, PE. PET and non-woven materials etc.; Good balance of heat resistance and cold resistance.
Amorphous polyalpha olefins (APAO) are a family of olefin-based thermoplastic polymers offering a combination of both physical and chemical properties. The advantages of low molecular weight and low crystallinity (high amorphous level) provide APAOs with characteristics such as easy processing, controlled tack and adhesive strength, and low temperature flexibility, as well as low density and excellent moisture resistance. Antioxidants are important in improving and maintaining the thermal stability of neat APAOs for both viscosity and color control. While phenolic antioxidants provide very good viscosity control, the addition of a secondary stabilizer, such as a phosphite or thioester, can provide additional improvements with regard to color while still maintaining good viscosity control.
Product Description High-Heat Resistance. Good for automobile industry. Experimental. Assembling. High-Heat Resistance. Long Open time, 2 minute, formulated for air filter. Ethylene vinyl acetate is the copolymer of ethylene and vinyl acetate. The weight percent vinyl acetate usually varies from 10 to 40%, with the remainder being ethylene.
It is a polymer that approaches elastomeric materials in softness and flexibility, yet can be processed like other thermoplastics. The material has good clarity and gloss, barrier properties, low-temperature toughness, stress-crack resistance, hot-melt adhesive water proof properties, and resistance to UV radiation. EVA has little or no odor and is competitive with rubber and vinyl products in many electrical applications.
Product Description General Packaging. A basic case and carton sealing glue. Amber color. Medium/Fast setting speed. High Performance General Packaging. Can be used on difficult board stock. Fast Setting Speed High-Tack. A packaging adhesive for glossy and varnished papers. Premium. Water-clear, good heating stability, good adhesion, no odor, no charring. Low Temperature. Carton sealing hot melt adhesive for running at 250°F. Frreezer Grade. Carton sealing hot melt adhesive for refrigerated or frozen foods applications with improved heat resistance. 300°F application temperature. Economical. Case and Carton Seal. Amber color with little smell. Fast setting time. High heat resistance. Amber color, excellent heat resistance. Fast setting time. High heat resistance. Clear color, no smell, good pot stability, good heat resistance. Fast setting time. Super high heat resistance. Amber color. Very fast setting time. Spine Glue. Good for coated stock. Milk white, lay flat, long open time. Spine Glue. Low melt. Good for offset paper, coated stock and books with thickness less than 1.5 inches. Long open time. Sprayable, good for foam to foam bonding and foam to corrugated boxes. Applications include: Bookbinding, Diaper, Adult Incontinence, Feminine Hygiene, Appliance, Doors and Millwork, Furniture, Case and Carton Sealing, General Packaging, Dress Shoes, Athletic ShoesAdvances in Adhesive Dispensing Technology Move Packaging to Greater Sustainability
Product Description Peelable Adhesive. Exremely low tack. Fugitive glue, removable. Experimental. Peelable Adhesive. Low tack. Fugitive glue, transparent and easily removable. Peelable Adhesive. Medium tack. Pressure sensitive hot melt that works for peelable bonding Assembling Adhesive. High tack on surface when sprayed or coated on difficult substrate materials. Labeling application. Exremely low viscosity. Clear. Experimental. Labeling application or side glue for book binding. Good tack. Low viscosity. Light color. Softer texture for mattress assembling. Palletizing glue. Mail Bag. High loop tack. Low viscosity. Fairly good cold resistance. Experimental. Polyamide hot melt adhesive, resistance to hi-heat, fuels, solvents and grease. Applications includes the following industries: Appliance, Doors, etc.
Thermosetting polyamides are known for thermal stability, good chemical resistance, excellent mechanical properties, and characteristic orange/yellow color. Polyamides compounded with graphite or glass fiber reinforcements have flexural strengths of up to 50,000 p.s.i. and flexural moduli of 3 million p.s.i. Thermoset polyamides exhibit very low creep and high tensile strength. These properties are maintained during continuous use to temperatures of 450°F (232°C) and for short excursions, as high as 900°F (482°C). Molded polyamide parts and laminates have very good heat resistance. Normal operating temperatures for such parts and laminates range from cryogenic to those exceeding 500°F (260°C). Polyamides are also inherently resistant to flame combustion and do not usually need to be mixed with flame retardants. Most carry a UL rating of VTM-0. Polyamide laminates have a flexural strength half life at 480°F (249°C) of 400 hours.
Typical polyamide parts are not affected by commonly used solvents and oils — including hydrocarbons, esters, ethers, alcohols and freons. They also resist weak acids but are not recommended for use in environments that contain alkalis or inorganic acids. Some polyamides, such as CP1 and CORIN XLS, are solvent-soluble and exhibit high optical clarity. The solubility properties lend them towards spray and low temperature cure applications.
Product Description General Purpose. For fabric, craft, wood and paper. High adhesion. Available in 1/2"x10", 5/8"x10", and 1"x3" High adhesion and strongin strength. Clear white. General Packaging. For Corrugated cardboard and chipboard. Medium-fast setting. Available in 1"x3" and 1.75"x1.75" General Packaging. For Corrugated cardboard and chipboard. Fast Setting. Available in 1/2"x10", 5/8"x2", and 5/8"x10" Excellent "Hot Tack" for corrugated cardboard and chipboard. Rapid setting. Available in 1/2"x10" and 5/8"x10"
Hot-melt adhesives facilitate fast production processes because the adhesives set simply by cooling. Formulations contain polymers to provide strength and hot tack (resistance to separation while adhesive is hot), and tackifiers and/or oils to dilute the polymer entanglement network, adjust the glass-transition temperature, lower the viscosity, and improve wet-out (molecular contact of the adhesive with the substrate over the entire bonding area). Some adhesives also contain waxes to speed setting, lower viscosity, and improve heat resistance. Obtaining adequate strength and heat resistance from nonreactive hot melts requires that some component of the hot melt separate out into a dispersed but interconnected hard-phase network upon cooling.
The hard phases are commonly either glassy styrene domains (for adhesives based on styrenic block copolymers) or organic crystallites (for adhesives based on waxes, olefinic copolymers, or ethylene copolymers).
Hot-melt adhesives are employed in many nonstructural applications. Based on thermoplastic resins, which melt at elevated temperatures without degrading, these adhesives are applied as hot liquids to the adherend. Commonly used polymers include polyamides, polyesters, ethylene-vinyl acetate, polyurethanes, and a variety of block copolymers and elastomers such as butyl rubber, ethylene-propylene copolymer, and styrene-butadiene rubber.
Hot-melts find wide application in the automotive and home-appliance fields. Their utility, however, is limited by their lack of high-temperature strength, the upper use temperature for most hot-melts being in the range of 40°–65° C (approximately 100°–150° F). In order to improve performance at higher temperatures, so-called structural hot-melts—thermoplastics modified with reactive urethanes, moisture-curable urethanes, or silane-modified polyethylene—have been developed. Such modifications can lead to enhanced peel adhesion, higher heat capability (in the range of 70°–95° C [160°–200° F]), and improved resistance to ultraviolet radiation.