Double-layer sharp-bottom bag

By designing a double-layered pointed-bottom bag with perforations in both the outer and inner layers, the outer layer being made of high-grammage virgin pulp paper and the inner layer being made of oil-resistant paper, the problems of non-degradability of plastic bags and insufficient oil resistance and heat insulation of single-layer paper bags are solved, achieving environmentally friendly, oil-resistant, and heat-insulating food packaging effects.

CN224061552UActive Publication Date: 2026-03-31HUIZHOU UNION PACKAGING CO LTD
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Patent Information

Application Number
CN202520774075.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-22
Publication Date
2026-03-31
Estimated Expiration
2035-04-22

AI Technical Summary

Technical Problem

Existing plastic food bags are non-degradable, posing environmental pollution problems, and also pose food safety risks and poor user experience when used for packaging high-temperature foods; single-layer paper bags lack sufficient oil resistance and heat insulation, making it difficult to withstand the weight and temperature impact of high-temperature fried foods.

Method used

Design a double-layer pointed bottom bag with through holes in the outer and inner layers. The outer layer is made of high-grammage virgin pulp paper, and the inner layer is made of oil-proof paper. The two layers are stacked to form a through-flow airflow channel and an oil-proof layer. The through holes of the outer and inner layers are coaxially arranged to quickly discharge hot steam. The inner layer blocks grease, and the outer layer increases breathability and load-bearing capacity. The double-layer structure provides heat insulation.

Benefits of technology

It achieves environmental friendliness, oil resistance, and heat insulation, shortens the degradation cycle, improves the safety and user experience of food packaging, avoids the risk of oil leakage and burns, and maintains the taste of food.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model aims to provide a double-layer sharp-bottomed bag which comprises an outer-layer bag and an inner-layer bag, an outer opening is formed in the outer-layer bag, a plurality of outer through holes are formed in two opposite side walls of the outer-layer bag, the inner-layer bag is arranged on the inner side wall of the outer-layer bag in an attached mode, an inner opening is formed in the inner-layer bag, the orientation of the inner opening is consistent with that of the outer opening, and the outer-layer bag is provided with a plurality of outer through holes. A plurality of inner through holes are formed in the two opposite side walls of the inner layer bag, and the inner through holes and the outer through holes are coaxially formed in a one-to-one correspondence mode. Therefore, the double-layer sharp-bottomed bag provided by the utility model has environmental protection property, oil resistance and heat insulation property.
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