Shanghai Duobang Chemical Co., Ltd. Single-component sponge spray adhesive DA-6100A I. Product Introduction 1. This product is a pure water-based sponge spray adhesive with good initial tack, strong final adhesion, long open time, and excellent high-temperature and water resistance. 2. Product and Process Parameters State: Milky white or light yellow liquid Viscosity: 1000-1200 mPaS Solid content: 55 ±2% Spraying amount: 30-40/m² Spraying distance: about 30cm (Do not use too high air pressure) Open time: 15-20 minutes Final adhesion: 2-4 hours to break Initial setting: After spraying the adhesive, wait for 1-5 minutes before bonding, the adhesion is optimal (the longer the open time, the greater the adhesion) 2cm thick sponge 180° bending does not bounce; high-density board sponge 90° bending does not bounce Heat resistance: 85℃ Water resistance: No degumming after soaking in tap water for 10 days. Uses: Mattress sponge, automotive interior, sofa, luggage, sponge and density board, leather, low-tension sponge, etc. II. Precautions 1. It is recommended to use a 1.8-2.0mm nozzle spray gun 2. Double-sided spraying is required 3. Do not use too much spray adhesive, try to use less, too much will cause slow drying and poor initial positioning 4. If higher heat resistance is required, increase the amount of spray adhesive appropriately 5. It is not recommended to add water to this product, adding water will affect the initial positioning (slow drying). If water is added, only deionized water can be added; 6. If spraying is not carried out for a long time, it is recommended to clean the spray gun in time, and rinse with pure water. 7. The gun should be washed with deionized water, not tap water or well water; III. Spray Adhesive Operation Method 1. Adjust the air and slurry output of the spray gun; adjust the sprayed adhesive layer to be a thin layer, both sponges need to be sprayed with adhesive, it is recommended to adjust the atomization to the minimum or turn it off. 2. After spraying the adhesive, wait 2-3 minutes before bonding for the best effect. After bonding, pressure can be repeated to set the shape, and a bonding pressure should be applied between the sponges. 3. It is recommended to move the sponges 0.5-1 hour after bonding. Processing should be carried out after 2 hours. 4. It is recommended to clean the inside of the spray gun at least twice a week. Due to the excellent water resistance of the product, it can be cleaned by soaking in solvent, soaking for 1-2 hours. IV. Common Problems and Solutions 1. Problem: No glue comes out after spraying for a long time Solution: Clean the spray gun in time and clean the inside of the spray gun regularly; 2. Problem: The sponge does not stick or the adhesion is low immediately after spraying the adhesive Reason: Too much or too little spray adhesive, slow drying due to too humid weather or too low temperature, oil stains or other foreign objects on the sponge, or damp sponge. Solution: Adjust the amount of spray adhesive. Extend the open time appropriately according to the weather conditions before bonding the sponge. Change to clean and dry sponge. 3. Problem: The bonded sponge cannot be reset Suggestion: If a second setting is required, do so before applying pressure.

Introduction to Qianwei PUR Hot Melt Adhesive PUR (Polyurethane Reactive), also known as moisture-curing reactive polyurethane hot melt adhesive in Chinese. The main components are isocyanate-terminated polyurethane prepolymers, with polar and chemically active urethane (-NHCOO-) or isocyanate (-NCO) groups in the molecular structure. It exhibits excellent adhesion to materials such as wood, metal, glass, rubber, plastic, leather, fabric, and paper. Qianwei's PUR composite adhesive technology is mature and remains a superior adhesive in many fields. The Qianwei PUR hot melt adhesive involves both physical and chemical reactions during use: the physical reaction is similar to ordinary hot melt adhesives, exhibiting thermoplastic and cold-setting properties. It is applied in a high-temperature fluid state, and quickly crystallizes and sets upon cooling during bonding; the chemical reaction involves cross-linking of the reactive groups of Qianwei PUR with active hydrogen in the material to form polyurethane polymers within a few hours to a few days after bonding. The cured Qianwei PUR hot melt adhesive is a polyurethane rubber, with significantly better bonding strength, solvent resistance, paint resistance, heat resistance, and hydrolysis resistance than EVA hot melt adhesives, water-based, or solvent-based adhesives. PUR hot melt adhesive is 100% active ingredient, without any water or solvent volatilization, meeting the highest environmental protection standards for adhesives and is considered the greenest option. Advantages of Qianwei PUR Hot Melt Adhesive Contains no organic solvents, 100% solid content, environmentally friendly; Moisture curing, no drying process, fast and energy-efficient; Excellent initial strength, with crosslinking and curing function, resulting in even higher final bonding strength; Excellent heat resistance, water resistance, chemical resistance, and durability; Single-component type, easy for industrial automation and mechanized operation, high production efficiency PUR - Adhesive Material Types Mainly used for leather composite, fabric composite, and footwear composite.

Product Introduction 1. This product is a water-based sponge spray adhesive. It features good initial tack, strong final adhesion, long open time, and excellent high-temperature and water resistance. 2. Product and Process Parameters State: Milky white or light yellow liquid Viscosity: 1000-1200 mPaS Solid content: 55 ±2% Spraying amount: 30-40/m² Spraying distance: About 30cm (Do not use too high air pressure) Open time: 15-20 minutes Final adhesion strength: 2-4 hours to break Initial setting: After spraying the adhesive, wait for 1-5 minutes for adhesion, the adhesion is optimal (the longer the open time, the greater the adhesion). 2cm thick sponge can be bent 180° without rebounding; high-density board sponge can be bent 90° without rebounding. Heat resistance: 85℃ Water resistance: No delamination after soaking in tap water for 10 days. Uses: Mattress sponge, automotive interiors, sofas, luggage, sponge and density board, sponge and wood, footwear materials, leather, low-tension sponge, etc. Precautions 1. It is recommended to use a 1.8-2.0mm nozzle spray gun. 2. Double-sided spraying is required. 3. Do not use too much adhesive, try to use less, as too much will cause slow drying and poor initial positioning. 4. If higher heat resistance is required, increase the amount of adhesive appropriately. 5. It is not recommended to add water to this product, as adding water will affect the initial positioning (slow drying). If water is added, only deionized water can be added. 6. If spraying is not carried out for a long time, it is recommended to clean the spray gun in time, simply rinse with pure water. 7. The spray gun should be cleaned with deionized water, not tap water or well water. Spraying Operation Method 1. Adjust the air and adhesive output of the spray gun; adjust the sprayed adhesive layer to be a thin layer, both sponges need to be sprayed, it is recommended to adjust the atomization to the minimum or turn it off. 2. After spraying, wait 2-3 minutes for the best sponge bonding effect. Without pressure after bonding, the shape can be repeatedly set, and a bonding pressure should be applied between the sponges. 3. It is recommended to move the sponges 0.5-1 hour after bonding. Further processing should be carried out after 2 hours. 4. It is recommended to clean the inside of the spray gun at least twice a week. Due to the excellent water resistance of the product, it can be cleaned by soaking in solvent, soaking for 1-2 hours. Common Problems and Solutions 1. Problem: No adhesive comes out after spraying for a long time. Solution: Clean the spray gun in time and regularly clean the inside of the spray gun. 2. Problem: The sponge does not stick or the adhesion is weak immediately after spraying. Reason: Too much or too little adhesive, slow drying due to high humidity or low temperature, oil stains or other foreign objects on the sponge, or damp sponge. Solution: 1. Adjust the amount of adhesive. 2. Extend the open time appropriately according to the weather conditions before bonding the sponge.

Duobang polyurethane adhesive Model: DA6100A Composite fabric, sponge and fabric composite, leather composite, leather and microfiber composite, aluminum foil and non-woven fabric composite, shoe material composite, knitted fabric, EVA, PVC, needle cotton patch, cloth patch, cloth patch yarn, yarn patch yarn, sponge composite factory, fabric composite factory, PVC composite factory, bonding factory (Mold cup cotton to cotton, cotton to cloth, cloth to cloth) Suitable for underwear bonding, cotton to cloth, cotton to cotton. Suitable for cloth, foam, PVC, PU, rubber and other materials.

Waterproof Composite Adhesive Model: DA-216 Waterproof composite adhesive, washable, waterproof and non-peeling, available in soft, medium-hard, and extra-hard types. The product exhibits excellent initial adhesion, requires no water dilution, and is ready for direct use. It offers excellent weather resistance (maintains adhesion even under high temperatures and freezing conditions), moderate softness, excellent flexibility, superior water resistance, strong adhesion, and excellent resistance to yellowing and good adhesion. Uses: Bonding foam-based materials, such as fabric-to-fabric, fabric-to-leather; various toy bonding applications, etc. Widely used in clothing, athletic shoes, and automotive seat cushion industries. Main Components: Acrylic butyl ester, acrylic acid, styrene, and other high molecular polymers, additives, and water. Product Appearance: Slightly blue viscous liquid Solid Content (%): 45±2 (adjustable) Viscosity (mPa•s, 25℃): 3000-20000 (adjustable) Density (g/cm3, 23℃): 1.04±0.02 pH Value: 6.5-9 Precautions 1. Do not mix with limewater or organic solvents. 2. Do not mix with other adhesives. 3. This product is a water-based adhesive, contains no organic solvents, is non-toxic, and non-flammable. Storage Conditions: Seal and store at temperatures not lower than 5℃, protect from sunlight. Shelf Life: 1 year. Packaging Specifications: 50kg/barrel, 120kg/barrel.

Shanghai Duobang Brand Environmental Protection Spray Adhesive I. Sofa and Swivel Chair Spray Adhesive Applicable to: Bonding between sponge and wood board, sponge, cloth, leather, paper, foam, and thermal insulation cotton in sofa and office chair industries. II. Screen Spray Adhesive Applicable to: Bonding between cloth and board in fabric screens. III. Thick Leather Spray Adhesive Applicable to: Bonding between shaped sponge, leather, cloth, plastic, metal, and wood board in thick leather sofas and shaped office chair furniture manufacturing. IV. Thin Leather Spray Adhesive Applicable to: Bonding between shaped sponge, leather, cloth, plastic, metal, and wood board in artificial leather, environmental protection leather, and fabric sofas. V. Luggage Spray Adhesive

Shanghai Duobang Brand Environmental Protection Spray Adhesive I. Sofa and Swivel Chair Spray Adhesive Applicable to: Bonding between sponge and wood board, sponge, cloth, leather, paper, foam, and heat preservation cotton in sofa and office chair industries. II. Screen Spray Adhesive Applicable to: Bonding between cloth and board in fabric screens. III. Thick Leather Spray Adhesive Applicable to: Bonding between shaped sponge, leather, cloth, plastic, metal, and wood board in thick leather sofas and shaped office chair furniture manufacturing. IV. Thin Leather Spray Adhesive Applicable to: Bonding between shaped sponge, leather, cloth, plastic, metal, and wood board in artificial leather, environmental protection leather, and fabric sofas. V. Luggage Spray Adhesive

General Properties: Appearance Milky white gel Solid content (%) ≥ 55.0 Viscosity (mpa.S) (Brookfield,@25) 3000±500 PH 4.5～6.5 Glass transition temperature Tg (°C) -10～ -5 Residual monomer (%) ≤0.5

General Properties: Appearance: Milky white gel; Solid content (%): ≥55.0; Viscosity (mpa.S) (Brookfield,@25): 3000±500; PH: 4.5～6.5; Glass transition temperature Tg (°C): -3～-5; Residual monomer (%): ≤0.5

General Properties: Appearance Milky white gel Solid content (%) ≥ 55.0 Viscosity (mpa.S) (Brookfield,@25) 2500±500 PH 4.5～6.5 Glass transition temperature Tg (°C) -20 ～ -10 Residual monomer (%) ≤0.5

Scope of Application 1. Bottoming/Setting bottom (bonding between shoe upper (genuine leather, PU, PVC, fabric, etc.) and outsole (rubber, PU, TPR, EVA, etc.)). 2. Vamp climbing, heel wrapping, midsole wrapping. 3. Combination soles (rubber/EVA, EVA/EVA, etc. shoe material combinations), welt strips, decorative strips. 4. Bonding of midsoles, EVA and other shoe midsole materials. 5. Folding edges, positioning, cloth clamping (folding and positioning of shoe upper material before sewing).

Various models of VAE emulsion, such as DA-102, DA-104, DA-101, and DA-264