The pulp fibers are naturally adsorbed in a layer by layer during the forming of paper holders. The liquid pulp will not flow out in some grooves, which results in the thickness of different positions after drying and the deviation of the standard thickness in design. When the paper holders are extruded under strong external force during high pressure shaping, the outermost part of the fibers in the inner and outer parts of the non-uniform thickness will break, which can be seen from the surface as follows: Fine cracks. This phenomenon will not affect the strength of paper holder packaging, so it is acceptable in the industry.
Paper holder products can be divided into three categories:
(1) Industrial paper holders: most of them are used in household appliances, medical equipment, power-on materials, lighting lining packaging materials, etc.
(2) Agricultural paper holders: most of them are suitable for fruit, eggs and nutrient bowls.
(3) Food paper trays: Most of them are used in food bowls, pots and food trays used in supermarkets.
First, the size is too large, the limit of the length and width of the machine used in the industry is 800 mm X600 mm. Special model: 1500mm X1200mm. It can't be produced beyond this size.
Secondly, it is stipulated that the design dimension is too small. Paper holder is designed to cushion and prevent earthquake by structure, so it must have certain structural design space.
Molded Pulp Packaging is short for MPP, commonly known as paper holder. Customs Code: 48239090
Flanging structure product is flat edge in forming. When forming vacuum naturally adsorbing pulp, the edge of the mould is stainless steel filter screen. The edge of the pulp fiber is irregular cotton flocculent after being adsorbed, which is formed by uncontrollable technology. After shaping flanging, the wool edge will turn to the side, without affecting packaging, and the industry is not a production control factor. If customers have high requirements for this, they can use cutting edge, cutting edge with knife die.