The requirements of the fully automatic paper bowl machine for raw materials (paper) are primarily reflected in the paper's gram weight, material, and coating type, as follows:
Paper Gram Weight Requirements
The fully automatic paper bowl machine typically requires the paper gram weight to range from 150 g/m² to 380 g/m². Different types of paper bowls have specific gram weight requirements:
Lightweight Paper Bowls: Such as common breakfast bowls and catering paper bowls, generally use paper with a gram weight of 200 g/m² to 250 g/m². In some cases, 170 g/m² paper may also be used for production.
High Load-Bearing Paper Bowls: Such as the inner layer of barrel-shaped instant noodle paper bowls, typically use paper with a gram weight of 280 g/m² to 350 g/m² to ensure the strength and durability of the paper bowl.
Paper Material Requirements
The fully automatic paper bowl machine usually processes base paper (white paperboard) made from chemical wood pulp. This type of paper offers good mechanical properties and printability, meeting the needs of paper bowl forming and printing.
Paper Coating Requirements
PE Coating: To make the paper bowl waterproof and oil-resistant, a layer of polyethylene (PE) coating is typically applied to the paper's surface. Paper bowls made from PE-coated paper feature mature technology, comprehensive supporting equipment, and moderate costs, making them mainstream products in the paper cup and bowl industry.
Other Coatings: With increasing environmental protection requirements, some paper bowls have begun to use biodegradable coating materials, such as PLA (polylactic acid) and other bio-based coatings, to meet market demand for eco-friendly products. However, PLA-coated paper bowls usually require additional waterproofing treatment and are more suitable for holding non-liquid foods, such as dry snacks and fruits.
