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300# 73mm Tinplate Bottom Ends | Oil-Proof Bases for Butter & Dairy Tin Packaging

2026-08-07

Introduction to 300# 73mm Tinplate Bottom Ends

The 300# 73mm tinplate bottom ends are standard-size high-performance metal sealing bases widely used in medium-sized food tin cans. Manufactured from premium food-grade ETP tinplate, these can bottoms feature precise 73mm diameter and professional crimping structure, delivering stable sealing performance for food can production lines. Specially optimized for fat-rich dairy products, the 300# 73mm tinplate bottom ends have become a reliable packaging solution for butter blocks, solid dairy spreads and oil-containing preserved foods.

Different from ordinary tin bases, this model adopts upgraded oil-resistant inner epoxy coating to solve common dairy packaging problems, including grease penetration, metal oxidation, flavor deterioration and short shelf life. It is a must-use packaging component for professional dairy food manufacturers.

Key Features of 300# 73mm Tinplate Bottom Ends

1. Excellent Grease and Dairy Fat Resistance

Butter and solid dairy products contain high milk fat and saturated grease, which easily corrode ordinary metal packaging materials. The 300# 73mm tinplate bottom ends are coated with a customized oil-proof protective layer that effectively isolates dairy grease infiltration. The dense coating structure prevents chemical reactions between fat components and the tinplate surface, avoiding rusting, black spots and coating peeling during long-term storage.

2. Airtight Sealing & Moisture Barrier Performance

Dairy products are sensitive to moisture, oxygen and external odors. With high-precision stamping and standardized 300# structure design, these 73mm tinplate bottom ends fit perfectly with matching tin can bodies. The tight crimping eliminates gaps, providing excellent airtight, dustproof and moisture-proof effects. It greatly reduces oxidation deterioration and keeps butter blocks fresh, mellow and odor-free throughout the shelf life.

3. Strict Food-Grade Safety Standard

All materials used for 300# 73mm tinplate bottom ends comply with international food contact regulations. Both the outer tinplate layer and inner protective lacquer are non-toxic, tasteless and food-safe. No harmful substances precipitate even in long-term contact with oily, high-fat and refrigerated dairy foods, making them fully suitable for retail-grade and high-standard food packaging.

4. Strong Anti-Oxidation & Durable Structure

The outer surface of the 300# 73mm tinplate bottom ends is treated with professional anti-rust and anti-oxidation technology. It can resist oxidation, friction and environmental erosion during long-distance transportation, cold chain storage and supermarket shelf display. The sturdy metal structure improves the overall compression resistance of tin cans and reduces packaging damage rate.

5. High Compatibility & Production Stability

300# 73mm is a universal standard size for medium dairy cans. It is fully compatible with automatic can sealing machines, suitable for large-scale industrial production of butter block cans, portable dairy tins and small fat food packaging. With stable ductility and uniform crimping performance, it effectively reduces defective rates and improves factory production efficiency.

Main Application Scenarios

The 300# 73mm tinplate bottom ends are highly targeted for high-fat food packaging. The most common applications include canned butter blocks, salted and unsalted butter tins, solid dairy spreads, margarine packaging, and other oil-rich preserved foods. It is also widely used in bakery ingredient packaging, portable travel food tins and retail gift food cans.

Customization & Wholesale Service

HJ GROUP provides full OEM and bulk wholesale services for 300# 73mm tinplate bottom ends. We support custom inner coating formulas for high-grease environments, custom logo printing, surface color finishing and personalized packaging solutions. Flexible MOQ meets the needs of both small-batch brand customization and large-scale factory mass orders.

With fully automated production lines and strict quality control systems, we guarantee stable quality, fast delivery and cost-effective prices for global food packaging suppliers and dairy processing factories.

FAQ

Q1: Are 300# 73mm tinplate bottom ends suitable for butter packaging?

A1: Yes. These tin bases are specially designed for high-fat dairy foods. The professional grease-resistant coating effectively prevents milk fat corrosion and keeps canned butter fresh longer.

Q2: Can you provide custom printing and custom coating?

A2: Absolutely. We offer customized inner lacquer, surface printing, embossed logos and color matching to support brand differentiated packaging.

Q3: Is this tinplate bottom end food safe for long-term storage?

A3: All materials are food-grade and comply with international food safety standards, safe for long-term contact with oily and refrigerated dairy products.

Conclusion

300# 73mm tinplate bottom ends are professional, safe and high-performance metal packaging accessories for butter blocks and fat-rich food tins. Featuring strong grease resistance, excellent airtight sealing, reliable anti-oxidation performance and food-grade safety, they solve the core pain points of dairy food packaging. For stable bulk supply and customized tinplate packaging solutions, HJ GROUP is your trustworthy manufacturer partner.

Custom Coated 300# 73mm Tinplate Bottom Ends for Retail Butter Packaging

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