There are two main types of paper used, ie soft dankertas rough paper. Paper used as packaging is kind kertaskasar, while fine paper used for writing paper in the form of paper bukudan cover. Here are some types of paper for packaging rough dapatdigunakan:
a) glassine paper and grease resistant paper
Glassine paper and grease resistant papers made by extending the time stirring the pulp before it is inserted into the paper making machine. The addition of other ingredients such as plasticizers aims to add softness and flexibility of paper, sehinggadapat used to package sticky materials.
The addition of antioxidants aimed unttuk slows rancidity and inhibit the growth of fungi or yeasts. Both types have kertasini surfaces such as glass and transparent, has a high resistance to grease, oil and oil, not water resistant even if the surface is coated with a waterproof material such as shellac and wax.
b) Parchment Paper
Parchment paper used to package foods such as butter, margarine, biscuits are high in fat, cheese, fish (wet, dry or fried), meat (fresh, dried, smoked or cooked), other livestock products, tea and coffee. The properties of paper perkamenadalah:
(1) has a good grease resistance,
(2) has a wet strength (wet strength) good walaupundalam boiling water,
(3) fiber-free surface,
(4) is odorless and tasteless,
(5) transparent and translusid, so often called glassine paper, and
(6) does not have a good inhibition of the gas, unless coated with certain materials.
c) Wax paper
Wax paper is paper that is coated with a wax material is essentially a paraffin wax with a melting point of 46-74 ° C and mixed polyethylene (titikcair 100-124 ° C) or petrolatum (melting point of 40520C). This paper can inhibit water, grease and oil resistant and has good heat adhesion. Wax paper used to package food, soap, tobacco and others.
d) Paper Container board
Daluang paper is widely used in the manufacture of grooved cartoons. There are two types of paper daluang, ie, line board also called kraft paper which comes from pine wood and corrugated medium derived from hardwood with sulfate process.
e) Paper Chipboard
Chipboard made from old newspapers and scraps of paper. This Jikakertas lightweight paper used, then called bogus namely the type of paper used as protective or cushioning on glassware. Chipboard paper can also be used as a wrapper with the low power range. If it will be used as folding cartons, it must be given certain additional materials.
f) Paper Tyvek
Tyvek paper is paper that is bound by HDPE (high density polyethylene). Was first made by Du Pont under the trade name Tyvek. Tyvek paper has a smooth surface with a good degree of whiteness and strong, and is often used for photo paper. This paper are:
(1) no grain that does not shrink or expand when there is a change of humidity,
(2) resistant to dirt, chemicals,
(3) free from mold contamination, and
(4) have the ability to inhibit bacteria into packaging
g) Soluble Paper
Soluble paper is paper that is soluble in water. This paper was first introduced by Gilbreth Company, Philadelphia under the trade name Dissolvo. Used for writing and by the FDA (Food and Drug Administration) should not be used for food. The properties of soluble paper is strong, unaffected humidity but rapidly dissolve in water.
h) plastic Paper
Plastic paper made due to limited sources of cellulose. Inidisebut paper also synthetic paper made from styrene sheet, has the properties as follows:
(1) the power to tear and fold resistance is good,
(2) power less rigid than paper cellulose, leading to problems in printing labels,
(3) does not change when there is a change of humidity (RH),
(4) resistant to grease, water and can not be covered with mold, and
(5) can be printed by the printing temperature is not too high, because polystyrene akan soft at a temperature of 80 o C.
Flexible packaging paper packaging is the first before the invention of plastic and aluminum foil. Currently the paper packaging is still widely used and is able to compete with other packaging such as plastic and metal because the price is cheap, easy to obtain and its extensive use. Besides as packaging, the paper also serves as a media communicator and print media. Weakness paper packaging for packing foodstuffs is sifanya sensitive to water and humidity easily influenced by the environment.
The properties of paper packaging is highly dependent on the manufacturing process and additional treatment in the manufacturing process. Paper packaging can be either flexible or rigid packaging packaging. Some types of paper that can be used as flexible packaging is kraft paper, kertastahan fat (grease proof). Glassin and wax paper (waxed paper) or paper made from modified these papers. Containers of paper rigid are in the form of cartons, boxes, cans fiber, the drums, the cups are waterproof, packaging tetrahedral and others, which can be made from paper board, laminated paper, corrugated board and various kinds of board of the paper special.
Paper containers are usually wrapped again with other packaging materials such as plastic and metal foils are more protective. Some of the images below are examples of paper packaging.
Figure 30. Various types of salted fish in cardboard packaging / cardboard