WO2000059697A1

WO2000059697A1 - A method for producing sheet or board of fibers of oil palm stem

Info

Publication number: WO2000059697A1
Application number: PCT/ID1999/000002
Authority: WO
Inventors: Handay Sendayung
Original assignee: Handay Sendayung
Priority date: 1999-04-01
Filing date: 1999-12-22
Publication date: 2000-10-12
Also published as: ID23022A; AU3071100A

Abstract

A method for making a sheet or board that is made from fibers of oil palm stem. The method consists of steps as follows: to provide fibers of oil palm stem; to dry the wet fibers until they reach 6-14 % of water content; to clean the dry fibers from dust and dirt; to solidify and flatten the dry fibers continuously by using punching machine which has more than 600 needles to make it into soft sheet of fibers; to adhere the soft sheet with a resin type adhesive; to heat press the sheet that has been adhered but not dry yet in an arranged certain thickness in 10-25 kg/cm2 of pressure for 3-15 minutes and in between 100-180 °C; and to form a board or sheet by cutting the hot pressed sheet into a predetermined desirable size.

Description

A METHOD FOR PRODUCING SHEET OR BOARD OF FIBERS OF OIL PALM STEM

The Technical Field This invention relates to a sheet or board made from stem fibers of oil palm

Present invention is a part of a seπes of inventions that are also proposed by the same inventor for inventions of producing sheet or board of different materials

The Background An In general the need on furniture and other building materials are not irrespective of the use of wood as a raw material Wood as a raw material should be directly cut from the industπal or natural forest, so the existence of the mentioned wood is very limited m supplying all the need in a long term, still as a main focus of the life preservation The growths of the industπal plants, trees, or forest are very slow comparing to the need of excessive and immediate demand on wood If there is no solution for solving the problem on wood, there will be a problem on the existence of raw building mateπals, especially for dependence on wood as a raw mateπal

One of the approaches in solving the problem related to the usage of wood is by substituting wood with boards or sheets that are made from abundant oil palm stem which can be easily obtained and produced

Furthermore, the need on natural wood can be substituted by board or sheet that are made from oil palm stem and that will not damage environment, and have lower cost of production with the same strength and quality as board of natural wood

The realization of the invention is to produce in huge numbers of product, then give more contπbution on the life preservation, especially m the field of building matenal

Disclosure of Invention

As a main objectiveness of the invention is to provide a sheet or board that made from oil palm stem, which is produced by the steps as follow to provide fibers of oil palm stem, to dry the wet fibers of oil palm stem by using the oil fueled mechanic dryer which blows hot steam to the stack of fibers in temperature of 80 - 100 °C, to solidify and to flatten the dπed fibers by using a punching machine continuously, to glue the solid and flat fibers by using a resm type adhesive, preferably formaldehyde urea resin or formaldehyde elamme resin, to press the hot fibers that have already glued by 10 - 25 kg/cm2 in 100 - 180°C and for 2 -10 minutes long, and to form board or sheet of fiber by cutting in a desirable size

Preferably in drying step, the wet fibers dryed by blown out hot steam in 80 — 100°C of mechanical drying machine to the stack of fibers in a drying room until the water content of fibers reaches 6 - 14%

Preferably in cleaning step, fibers cleaned by blown pressured air to the stack of fibers of conventional blower until all fibers are clean

Preferably fibers will be continuously solidified and flattened by punching machine with more than six hundreds punching needles to make fibers in soft, solid and flat sheet forms

Preferably in adheπng step, the soft sheet form of fibers will be adhered by giving resm type adhesive, preferably urea or melamme formaldehyde resm with content of adhesive m 10 - 25% of the total weight of fibers.

Preferably in hot pressing step, sheet of fibers will become hard sheet or board of fibers where it is possible to make sheet of fibers in more than one layer of sheets. If there are more than one layer of sheets, more than one soft sheets with wet adhesive on it will be pressed by heat pressing to make a multilayer hard sheet of fibers in a desirable thickness. Preferably each finished product has about 0.2 - 3 mm of thickness

Furthermore, to easily understandable, details' explanation will be given as follows

Brief Descnption of Drawings

Figure 1 is flow chart of a method of present invention, and Figure 2 is perspective view of sheet or board made by the method of present invention

Preferred Embodiments for Carrying Out The Invention

In present invention the term of sheet or board is only differentiated by the size of total thickness So the method for producing a sheet or board of palm oil fibers that will be explained below is basically same

Refemng to figure 1, the first step of the method of present invention is prepaπng (A) fibers of oil palm stem conventionally, for example, by milling or pounding repeatedly and then fiberizing to obtain more fibers, each stem has different content of fibers, depend on its thickness itself The age of stem it self is various, the important thing is that it has already contained some fibers. Therefore, to obtain some fibers for the stem of oil palm is not differentiated by stem size. In such of taking the fibers of that stem, it can be use a conventional method as mentioned above, or by using the modern one that is nailed rolls to fiberize the stem which has been milled or pounded. The average length of obtained fibers is among 2 - 40 cm and the thickness is about 0.2 - 3 mm.

The next step is drying (B) the rather still wet fiber by oil fueled mechanical machine. Hot steam with temperature among 80 - 100°C generated from the machine is to be blown to the fibers stack till the water content of 6 - 14%. This-drying work (B) will be done in a drying room or a vessel continuously. The height and width of the stack is adjusted by the capacity of the available machine.

The further step is cleaning (C) the fibers of oil palm stem from dirt and dust. It can be done by blowing the pressured air from the blower directed to the fibers stack in a specific container, so the fibers will not be scattered but dust and dirt will be disappeared. The following step is solidifying and flattening (D) continuously the fibers that have been cleaned and dried by the punching machine which has six hundreds needles, so the disorder fibers will become order and flat in a soft sheet form.

The soft sheet continued to adhering step (E) by using resin type adhesive, preferably urea or melamine formaldehyde resin. The content of adhesive to the total weight of fibers is in the range of 10 - 25 %. It can be done by many methods such as, dipping the sheet of fibers into an adhesive tube or spraying the thin adhesive to all of the sheet surfaces.

After adhering (E) the soft sheet, the step will be continued to make the sheet half dry (F), then cut (G) the sheet into a desirable size. Then heat pressing (H) of 100-180 °C for 3 - 15 minutes on 10 - 25 kg/cm2 of pressure. One layer of sheet that have been pressed will gain the finished product with a 1,5 - 3 mm of thickness.

If preferably thickness is more than 2 mm, the soft sheet which had been dried yet will be piled in layers and then pressed by heat pressing together, so it can be form a hard sheet or board by using the same method as well. Then, cutting (I) the edge side to make it proper and make it into a desirable size.

From the above steps that have been mentioned, the present invention provides a board or sheet of oil palm stem , resin type adhesive for gluing the fibers into sheet and and into layers of sheets. The board or sheet obtained is a hard board or sheet that can be used as a building material for such as wall, plafond, paπition wall, heat isolator, sound isolator, for producing boxes, containers and other coating materials.

That is all explanation on the present invention, and to understand its scope, we enclosed the claims of the present invention below

Claims

1. A method for producing a sheet or board of fibers that made from oil palm stem consist of steps as follows: providing fibers of oil palm stem; drying the wet fibers until it reaches 6 - 14 % of water content; cleaning the dry fibers from dust and dirt; solidifying and flattening the dry fibers continuously by using punching machine which has more than 600 needles to make it into soft sheet of fibers; adhering the soft sheet with a resin type adhesive; heat pressing the sheet that have been adhered but not dry yet in an arranged certain thickness in 10 - 25 kg/cm2 of pressure for 3 -15 minutes and in between 100 - 180°C; and forming board or sheet by cutting the hot pressed sheet into a predetermined desirable size.

2. A method for producing a sheet or board that made from fibers of oil palm stem as claimed in claim 1, wherein drying the fiber is by blowing hot steam from oil fueled mechanic dryer in between 80 - 100 °C of hot steam temperature.

3. A method for producing a sheet or board that made from fibers of oil palm stem as claimed in claim 1, wherein the resin type adhesive is urea formaldehyde resin.

4. A method for producing a sheet or board that made from fibers of oil palm stem as claimed in claim 1. wherein the resin type adhesive is melamine formaldehyde resin.

5. A method for producing a sheet or board that made from fibers of oil palm stem as claimed in claim 1, wherein the resin type adhesive is contains of 10 - 25% of total weight of glued sheet.