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In daily life, PP plastic products represented by PP fresh-keeping boxes are becoming increasingly common, but many people do not even know what PP material is. Is PP material toxic? Is the PP fresh-keeping box good? How to choose PP plastic fresh-keeping boxes? Below, the editor will answer each question one by one, unveil the mysterious veil of PP plastic fresh-keeping boxes, and recommend some popular PP plastic fresh-keeping box brands for everyone to choose from. Come and explore them now.

Introduction to PP fresh-keeping box

Before understanding PP fresh-keeping boxes, it is necessary to first clarify what PP material is. The so-called PP material is a type of plastic, namely polypropylene, which is a high-density, side chain free, high crystalline linear polymer with excellent comprehensive properties. The commonly used pots, buckets, woven bags, etc. in daily life are mostly made of PP material. PP products have light weight, good toughness, and good chemical resistance, but their rigidity is insufficient, weather resistance is poor, and they are prone to aging, brittleness, and deformation. PP products that are generally allowed to hold food must be food grade and comply with national inspection standards and regulations.

Is PP material toxic?

PP plastic itself is non-toxic, and generally its blown products (bottles, bags, films, etc.) are also basically non-toxic. However, in its injection, extrusion and molding plastic products (pots, boxes, racks, etc.), there are a large number of fillers, pigments, plasticizers, anti-aging agents and other chemical components, the content of which often exceeds that of PP itself, so it cannot be easily considered non-toxic.

Can PP fresh-keeping boxes be placed in microwave ovens

Plastic PP material is non-toxic, odorless, and has high heat resistance. It can be used at a high temperature of 100 degrees Celsius. Therefore, PP fresh-keeping boxes can be heated in a microwave oven. However, generally speaking, the lid of the fresh-keeping box is not made of PP plastic, but PC plastic or other materials with a maximum temperature resistance of 80 degrees Celsius. Therefore, the plastic box lid cannot be directly placed in the microwave oven and needs to be removed before use.

What are the advantages of PP fresh-keeping boxes

PP plastic fresh-keeping boxes are generally transparent or semi transparent, and the contents of the box can be easily confirmed without opening the box during use; The production cost of PP plastic fresh-keeping boxes is low, so they have a certain price advantage compared to ceramic and heat-resistant glass fresh-keeping boxes; The PP fresh-keeping box is lightweight, easy to carry, designed with compartments, and more convenient to use.

Which is better, PC or PP fresh-keeping box

Plastic PC fresh-keeping boxes, like PP fresh-keeping boxes, have the characteristics of being non-toxic, odorless, and resistant to chemical corrosion, and can be used to contain and store food. However, when PC material is heated, it releases bisphenol A, which is harmful to the human body. Therefore, PC preservation boxes cannot be directly placed in microwave ovens for heating. PP preservation boxes are superior in this regard.

Key points for purchasing PP fresh-keeping boxes

01. Observe the appearance

Food grade PP plastic fresh-keeping boxes are healthy, safe, and hygienic, with a glossy appearance and no burrs. When purchasing, special attention should be paid to observing the appearance of the fresh-keeping box. Items with dark color and many burrs may be made of ordinary plastic or recycled plastic.

02. Check heat resistance

The P plastic fresh-keeping box has high requirements for heat resistance and will not deform at high temperatures. When purchasing, be sure to choose a fresh-keeping box with a triangular pattern on the bottom and marked with words such as "suitable for microwave ovens".

03. Check durability

PP plastic fresh-keeping boxes should have superior impact resistance, be not easily broken under heavy pressure or impact, and not leave scratches. When making a purchase, you can try gently squeezing and scratching the freshness box to see if problems easily occur.

04. Check the sealing performance

Excellent sealing is a necessary condition for the long-lasting preservation of food in the freshness box. You can add water to the PP freshness box, cover the lid, and then flip it over for 1-2 minutes, or shake it vigorously. If water seeps out, it indicates poor sealing performance.