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As a result, dioxin production has reduced significantly.
Bruce
2024-10-26
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Bruce
2024-10-26 11:34
since the 1990s, the use of elemental chlorine in the delignification process was substantially reduced and replaced with ECF (Elemental Chlorine Free) and TCF (Totally Chlorine Free) bleaching processes.
Bruce
2024-10-26
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Bruce
2024-10-26 11:34
In the past, chlorine was widely used in the bleaching of wood pulp, especially chemical pulps produced by the kraft process, which produced significant quantities of toxic dioxins.
Bruce
2024-10-26
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Bruce
2024-10-26 11:33
This means that hardly any sulfur dioxide (an indirect greenhouse gas) enters the atmosphere.
Bruce
2024-10-26
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Bruce
2024-10-26 11:33
Although there are various malodorous emissions as a result of this process, control of these odours is achieved through their collection and burning in a recovery boiler.
Bruce
2024-10-26
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Bruce
2024-10-26 11:33
To make kraft paper, the lignin and cellulose in the wood must be separated by cooking it in chemicals such as sodium sulfide.
Bruce
2024-10-26
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Bruce
2024-10-26 11:33
In recent years, the manufacture of kraft paper has become considerably more eco-friendly.
Bruce
2024-10-26
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Bruce
2024-10-26 11:32
However, in order to determine whether it is sustainable or not, it is important to make the distinction between its manufacture and its after-use.
Bruce
2024-10-26
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Bruce
2024-10-26 11:32
Kraft paper is derived predominantly from wood chips, a renewable resource
Bruce
2024-10-26
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Bruce
2024-10-26 11:32
Is kraft paper environmentally sustainable?
Bruce
2024-10-26
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20
Bruce
2024-10-26 11:32
However, the qualities that make it eco-friendly also means it will weaken when it makes contact with water and will eventually degrade in the presence of heat, sunlight, and humidity.
Bruce
2024-10-26
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Bruce
2024-10-26 11:31
In its natural form, its light brown colour and rough texture is favoured for its earthy, natural associations.
Bruce
2024-10-26
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Bruce
2024-10-26 11:31
Today, kraft paper has become a widely used packaging material for a range of goods
Bruce
2024-10-26
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Bruce
2024-10-26 11:31
The resulting pulp can then be made into a variety of paper products, including kraft paper.
Bruce
2024-10-26
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Bruce
2024-10-26 11:31
Once the pulp is formed, it is then screened to remove larger pieces, before being washed to remove any residual fluids.
Bruce
2024-10-26
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Bruce
2024-10-26 11:30
As a result, the pulp is high in cellulose, which is the main component of paper and is naturally structurally resistant.
Bruce
2024-10-26
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Bruce
2024-10-26 11:30
This removes a polymer called lignin from the pulp, as lignin binds cellulose fibres together at a microscopic level.
Bruce
2024-10-26
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23
Bruce
2024-10-26 11:30
The process of making kraft paper involves boiling wood chips in sodium sulfide and sodium hydroxide to chemically convert them into wood pulp.
Bruce
2024-10-26
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23
Bruce
2024-10-26 11:30
Kraft paper packaging has been around since the late 19th century.
Bruce
2024-10-26
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Bruce
2024-10-26 11:30
Read on to find out more about kraft paper coffee bags and its impact on the environment.
Bruce
2024-10-26
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Bruce
2024-10-26 11:29
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