Fiber based product
AssigneeUpm-Kymmene Corporation
InventorsSuvi PIETARINEN, Sanna VALKONEN, Okko RINGENA
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Abstract
The invention relates to a method for producing a fiber based product, wherein the method comprises the steps of: a) applying a binder composition over a surface at least one fiber based substrate; b) determining the distribution of the applied binder composition over the en-tire at least one surface of the at least one fiber based substrate; and c) based on the determination in step b) either accepting the treated at least one fiber based substrate for the production of the fiber based product or rejecting the treated at least one fiber based substrate from the production of the fiber based product. The invention further relates to a method for producing a binder composition, to a binder composition and to a fiber based product.
Claims40
A method for producing a fiber based product, the method comprising:
- a) applying a binder composition over at least one surface of at least one fiber based substrate, the binder composition prepared by using at least a polymerizable substance, a crosslinking agent, and a colorant, wherein the colorant is used in an amount such that the difference between a color of the binder composition and a color of a corresponding binder composition prepared without the use of the colorant, as measured on a Gardner scale, is at least 3 units;
- b) calculating the distribution of the applied binder composition over the entire at least one surface of the at least one fiber based substrate;
- and
- c) accepting the treated at least one fiber based substrate for the production of the fiber based product when contrast value is 50% or less, or rejecting the treated at least one fiber based substrate from the production of the fiber based product when the contrast value is greater than 50%, wherein the contrast value is defined as (Ds−Dt)/Ds*100%, wherein Ds is a reflection density of the binder composition, and Dt is a reflection density of the surface of the at least one fiber based substrate having the binder composition applied thereon, as measured by reflection densitometry.
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A method for producing a binder composition, the method comprising:
- preparing the binder composition by combining at least a polymerizable substance, a crosslinking agent, and a colorant, wherein an amount of the colorant is such that the difference between a color of the binder composition and a color of a corresponding binder composition prepared without the use of the colorant, as measured on a Gardner scale, is at least 3 units, wherein the colorant is lignin having a polydispersity index of 1.5-15.
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A plywood fiber based product, comprising:
- at least one fiber based substrate having a binder composition applied over at least one surface of the at least one fiber based substrate, the binder composition being prepared by using at least a polymerizable substance, a crosslinking agent, and a colorant,
- wherein an amount of the colorant is such that the difference between a color of the binder composition and a color of a corresponding binder composition prepared without the use of the colorant, as measured on a Gardner scale, is at least 3 units, and
- wherein a contrast value between the fiber based substrate over which the binder composition has been applied and the binder composition is 50% or less, the contrast value being determined as (Ds−Dt)/Ds*100%, where Ds is the reflection density of the binder composition, and Dt is the reflection density of the surface of the at least one fiber based substrate having the binder composition applied thereon, as measured by reflection densitometry, the average wood failure of the plywood being above 60%.
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Dependencies are inferred from the claim text.