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TEMCELL® HIGH-YIELD PULP
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FAQS

What is pulp?

Pulp is a generic term for a wide range of technically distinct products resulting from complex manufacturing processes that involve the chemical and/or mechanical treatment of various types of plant material. Wood currently provides the basis for approximately 90% of global pulp production; the remaining 10% are derived from straw bamboo, bagasse, kenaf, flax, hemp, cotton, etc. Pulp is used predominantly as a major component in the manufacture of paper, tissue and paperboard, with smaller quantities of pulp finding their way into a diversity of products - rayon, photographic films, cellophane and explosives, to name a few.

What is High-Yield Pulp (HYP)?

High-Yield Pulp is pulp that optimizes the use of trees. It is made by a mostly mechanical process with refiner plates in order to separate and extract the fibers from the wood. This is in contrast to chemical pulp, which cooks the wood in a chemical mixture in order to separate and extract the wood fibers. HYP’s mechanical pulping process has the advantage of converting approximately 90% of wood into pulp, versus approximately 45-50% converted via a chemical pulping process. HYP is considered a high quality mechanical pulp because of its superior properties versus that of a pure mechanical pulp.

How is HYP made?

The production of HYP consists of wood chip pre-treatment, refining, screening and cleaning, bleaching, drying, and pressing into a bale. The quality is controlled by refining and bleaching with hydrogen peroxide; the bleaching process for HYP is totally chlorine-free (TCF).  HYP production is very flexible, allowing for dozens of products tailored to customers’ needs.

Why does producing HYP require less chemical content than other pulps such as chemical pulp?

Chemical pulps such as softwood and hardwood kraft (sulphate) pulps use chemicals to separate the fibers from the lignin and hemicelluloses, which are then washed away resulting in a yield of approximately 50%.  The HYP process uses mechanical forces in refining to separate the fibers.  The lignin and hemicelluloses are retained on the fiber, resulting in a yield of about 90%.

What is the difference between HYP and BCTMP?

The two terms are for the most part synonymous. BCTMP (Bleached Chemi-Thermo-Mechanical Pulp) is the technical name used to describe one specific and common type of mechanical pulping process that can be used to produce HYP. Tembec uses the name High-Yield Pulp to promote the fact that the pulp yield as a percentage of wood fiber consumed is very high at around 90%, compared to that of chemical pulp at around 45-50%.

Where is the wood coming from to produce Temcell HYP?

The wood is sourced from sawmills as a co-product in lumber manufacturing and converted round wood. The round wood is sourced primarily from Crown tenure located in Ontario and Quebec. As well, a small portion of the volume is sourced from private land.

Why are aspen and maple the preferred wood sources for Temcell HYP?

Aspen and maple wood species provide superior performance advantages in the paper-making process - smoothness and opacity for aspen; bulk and formation for maple.

Why should paper, tissue, and paperboard makers add Temcell High-Yield Pulp to their manufacturing process?

Temcell HYP affords our customers the opportunity to produce paper with excellent quality characteristics at a lower basis weight. For coated and uncoated paper, using Temcell HYP improves the quality parameters of bulk, coating hold-out, formation, internal fiber bond, porosity, compressibility, smoothness, and stiffness. The same holds true for paperboard with improved convertibility. For tissue and toweling, absorbency and softness are improved.

Lower basis weight and higher filler content provide important cost savings. Our expertise allows us to offer tailor-made products, giving our customers the best value possible.

What is the environmental impact of producing Temcell HYP?

When compared to kraft pulp, Temcell HYP produces high quality paper products using half the number of trees than other pulps. Temcell HYP process is also totally chlorine-free and uses a minimum 83% of renewable energy from a combination hydro-electricity, biogas, and biomass. Water consumption, effluent, air emissions and solid wastes are also significantly lower with Temcell HYP. Thus the use of Temcell HYP will result in fiber, water and greenhouse gas (GHG) reduction during the production of papers and paperboards.

For example, using HYP results in 12kg less greenhouse gas emission for every 10% of HYP used per metric tonne of paper; and approximately 10 kg of solid waste per tonne of pulp is typically generated by a HYP mill versus approximately 45-55 kg generated by a conventional kraft pulp mill.  The HYP process also has a zero AOX effluent discharge.

If HYP manufacturing has a reduced environmental impact, why can’t paper be made entirely from HYP?

Paper made from 100 % HYP would be considered newsprint. HYP does not have enough internal strength and surface strength for printing & writing paper (such as copy and magazine papers), tissue and paperboard.

How do I know if the product I’m buying contains Temcell HYP from FSC sources?

Currently, paper and packaging products don’t provide any detail on the HYP content contained within them. Maybe it’s time for us all to start requesting retailers and consumer goods companies (if you are a consumer) as well as paper producers (if you are a retailer or company) to indicate the HYP content in their paper and packaging products and, specifically, whether it contains FSC-certified Temcell HYP.

Where do you do your HYP research?

Research is conducted on-site at our Temiscaming QC complex. We also carry out some of our research in conjunction with a few universities in Canada and China.

Do you ship worldwide?

Yes. Wherever you require Temcell HYP, we can get it there.