4-Side Seal Flat Sachets
Maximum four-perimeter hermetic security for medical diagnostic strips, transdermal patches, wet wipes, and concentrated agrochemicals.
Engineered for High-Barrier Protection & Shelf Pop
The 4-Side Seal Sachet (Quad-Border Sachet) features heat-sealed borders around all four distinct perimeter edges, creating a symmetrical, ultra-flat packet. Because sealing occurs concurrently on four sides, it provides the highest degree of hermetic integrity in flexible packaging. Engineered in QINPACK's Class 100,000 cleanroom workshops in Haizhu, Guangzhou, our 4-side seal sachets utilize medical-grade aluminum foil laminations that block 100% of light, moisture, and vapor transmission for sensitive pharmaceuticals and diagnostics.
Recommended Production Options:
Quad-Border Seam Hermeticity & Medical Migration Control
Exceeds USP <671> and ISO 11607 sterile medical packaging standards.
ASTM F88 continuous peel verification
ASTM D3078 medical immersion test
Zero chemical migration into sensitive payload
ASTM F1306 penetration resistance
Factory Customization & Engineering Matrix
Explore barrier substrate formulations, functional hardware add-ons, dieline tolerances, and standard fill capacities.
Ultra-High Barrier (Pure Foil)
Whole bean coffee, baby nutrition, pharma powders, active reagents.
High Barrier (Metallized)
Potato crisps, nuts, granola, pet treats, dry bakery snacks.
Clear High-Barrier (EVOH / AlOx)
Organic dried berries, confectionery, artisan pasta with display window.
100% Recyclable Mono-PE
ESG-focused brands, EU packaging directive compliance, SPI Code 4.
Heavy-Duty Puncture-Proof
5kg–10kg bulk pet kibble, coarse bath salts, bone broths, sharp granules.
Natural Tactile Kraft Barrier
Organic grains, artisan tea blends, botanical supplements, herbal mixes.
Detailed Technical Parameter Matrix
Physical tolerances, seal strengths, temperature ranges, and regulatory standards.
Why Brands Specify This Pouch Format
Factory Direct Precision Fabrication
Fabricated inside our Class 100,000 cleanroom workshops in Haizhu, Guangzhou under strict BRCGS AA and ISO 9001 quality controls.
Engineered Multi-Layer Barrier Laminates
Custom barrier structures engineered specifically for your product payload to extend shelf life up to 18-24 months.
100% Full-Bleed Electronic Gravure Printing
Up to 10-color electronic cylinder printing with spot matte lacquer, metallic sheen, and micro-calibrated registration.
Zero Pinhole Leak Guarantee
Tested under ASTM negative pressure bubble submersion chambers to verify absolute hermetic perimeter seal integrity.
Low MOQ & Rapid Global Delivery
Low minimum order quantities starting from 500 units for digital runs, with DHL courier sample dispatch within 24 hours.
Full Technical & Dieline Engineering Support
Free Adobe Illustrator dielines, pre-press color proofing, and packaging machinery compatibility consulting.
Where This Packaging Shines
Specialty Food & Snacks
Artisan chips, gourmet crackers, trail mix, dried fruits, and confectionery treats.
Specialty Coffee & Botanical Tea
Whole roasted coffee beans, ground coffee, matcha powders, and herbal tea blends.
Pet Nutrition & Treats
Freeze-dried meats, dental chews, baked kibble, and veterinary wellness supplements.
Nutraceuticals & Health Powders
Electrolyte hydration powders, protein blends, collagen peptides, and superfoods.
Personal Care & Cosmetics
Facial sheet masks, bath soak crystals, skincare powders, and travel sachets.
Industrial & Lawn Care
Specialized chemical reagents, agricultural seeds, biological fertilizers, and hardware.
Frequently Asked Questions About 4-Side Seal Flat Sachets
Answers regarding barrier performance, custom dielines, filling machinery compatibility, and minimum order runs.
Explore Complementary Pouch Styles:
Ready to Quote Your Custom 4-Side Seal Flat Sachets?
Send your estimated dimensions, target shelf life, and quantities. We provide free vector dielines, itemized factory pricing, and barrier material recommendations within 24 hours.