When customizing sealing film, many people don't know how to specify their requirements and often just say "I want aluminum foil" or "I want easy-tear." The result is either the wrong size or unsatisfactory sealing performance, wasting time on repeated revisions. In fact, by preparing the following information in advance, the customization process will go much smoother.

1. Container Information: Bottle Mouth Size & Material

Sealing film needs to precisely match the bottle mouth, so container information is the foundation of customization.

Bottle mouth size: Provide the inner or outer diameter of the bottle mouth (caliper measurement recommended). For irregularly shaped mouths, best to provide an actual sample or detailed drawings.

Container material: Common bottle mouth materials include PET, PE, PP, PS, glass, metal, etc. Different materials require matching different heat-seal adhesive layers; choosing wrong leads to poor sealing.

Container use: Food, cosmetics, pharmaceuticals, or daily chemicals? Different industries have different safety standards, affecting material selection.

2. Contents Information: What the Sealing Film Must "Resist"

The sealing film contacts the contents directly, so the characteristics of the contents determine the choice of adhesive layer and film material.

Content type: Liquid, paste, powder, or granules? Liquids are most prone to leakage, powders to moisture, pastes have high requirements for adhesive layer adhesion.

Chemical properties: Does it contain alcohol, acidic components, oily substances, or corrosive ingredients? These affect the corrosion resistance of the adhesive layer.

Usage environment: Does it require freezing, retort processing, or hot filling? Different temperature requirements correspond to different temperature resistance grades.

3. Usage Requirements: Seal, Easy-Tear, or Breathable?

Sealing film is not just about "sealing." Different opening experiences can be customized based on product characteristics.

Sealing requirement: Standard seal or high barrier (moisture-proof, oxygen-proof, light-proof)? High barrier typically uses aluminum foil composite structure.

Opening method: Standard opening, easy-tear, easy-peel, or partial-peel? Easy-tear film requires controlling peel force to ensure effortless opening without residue.

Special functions: Does it require breathability (e.g., car perfume), draining (e.g., instant noodles), anti-counterfeiting (e.g., QR code/laser marking)?

4. Appearance & Branding: Printing Needed?

If the sealing film needs to carry brand information, appearance customization is also important.

Printing content: Logo, product name, usage instructions, QR code, anti-counterfeiting code, etc. Design files (AI, CDR, PDF format) need to be provided.

Printing colors: Single color, multi-color, hot stamping, matte, etc. Different processes affect cost and results.

Surface treatment: Does it require embossing, laser effects, matte coating, etc., to enhance texture?

5. Production Requirements: Size & Quantity

Size specifications: Piece film or roll film? Piece film requires diameter; roll film requires width, roll diameter, and core inner diameter.

Minimum order quantity (MOQ): Standard products typically start at 5,000 pieces, custom products depend on the process. Small-batch custom orders can also be discussed.

Delivery lead time: Standard sampling 3-7 days, mass production 7-15 days. Rush orders negotiable.

6. Other Supplementary Information

If you have used sealing film before with unsatisfactory results, describe the specific problems (leakage, difficulty tearing, residue, detachment, etc.), and the Leadtra technical team can provide optimization suggestions based on experience. If you have existing samples or competitor samples, sending them directly helps in more precise matching.

Leadtra Packaging provides custom sealing film and sealing gasket services, with full technical support from requirements communication and sample testing to bulk delivery. You are welcome to provide samples or detailed requirements, and we will help quickly match you with the most suitable sealing solution.