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What paper are cups made of?

Update:25 May 2019
Summary:

Production of disposable paper cups, usually paper cup […]

Production of disposable paper cups, usually paper cup base paper. The so-called paper cup base paper, more than ordinary paper need to be treated in impervious water, and because of direct contact with the mouth, it needs to meet food-grade standards. In order to achieve the whiteness of paper, fluorescent whitening agent is often added, and fluorescent whitening agent is carcinogen, so the production of cup base paper can not add ordinary fluorescent whitening agent, only food-grade whitening agent can be added. In addition, after the production of base paper, PE film (i.e. a layer of plastic-like things on the surface of paper) is also needed. The purpose of PE film is to prevent water seepage, and the other is to be used as an adhesive when paper cups are formed.
Paper cup
A paper container made of wood pulp raw paper (white board) for mechanical processing and bonding, with a cup-shaped appearance.
Paper cups for frozen food can be waxed and filled with ice cream, jam and butter.
The paper cup used for heating and drinking is coated with plastic, which can withstand the temperature above 90 C and can hold boiling water.
The characteristics of paper cups are safety, sanitation, lightness and convenience.
Public places, restaurants and restaurants can be used as disposable goods.
Paper cups are divided into one-sided PE film cup and two-sided PE film cup.
One-sided PE paper cup: The paper cup produced with one-sided PE film paper is called single PE paper cup (most of the domestic common market paper cups and advertising paper cups are single PE film paper cups). Its manifestation is that the water side of the paper cup has a smooth PE film;
Double-sided PE paper cup: The paper cup made of double-sided PE paper cup is called double-sided PE paper cup. The form of expression is that there are PE film inside and outside the paper cup.
Cup size: We measure the size of paper cups in ounces (OZ). For example, 9 ounces, 6.5 ounces, 7 ounces of paper cups are common in the market.
OZ: An ounce is a unit of weight. Here it stands for an ounce of weight equal to 28.34 milliliters of water.
One ounce (OZ) = 28.34 milliliters (ml) = 28.34 grams (g)
Paper Cup: At home, we call cups of 3 - 18 ounces (OZ) size paper cups.

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