UFP-1001 - Application on Plywood

UFP 1001 is a special form powder resin developed from liquid Urea Formaldehyde Resin. Since it's in powder form, UFP 1001 is easy to transport, giving more comfort to users coming from different islands or abroad. This product has a storage life of up to 12 months, unlike liquid Urea Formaldehyde Resin which only last for less than one month. It is very suitable for when production is not predictable.

UFP 1001 is also possible to be used in the assembly of high-grade furniture, edge-gluing, doweling, finger-jointing, and other similar woodworking operations. Besides plywood manufacturing, UFP 1001 can also be successfully adapted to the manufacture of particle board, chipboard, MDF, and the overlaying of decorative paper or veneers.

TECHNICAL SPECIFICATIONS

   *Note: Specifications can also be adjusted upon customer request.

  

CLEANING AND HANDLING

UFP 1001 Powder Resin glue mix is acidic in nature. DO NOT mix with Phenol Formaldehyde Resin for Water-Boil Proof grade plywood which is alkali in nature. If Phenol Formaldehyde Resin has been used in the glue mix before UFP 1001 Powder Resin, then the mix should be cleaned before changing into UFP 1001 Powder Resin.

UFP 1001 Powder Resin glue mix can be easily washed with normal or warm water. If cleaning is rather tough, use 10% Urea solution to help the process.

 

STORAGE

In its original container at 30°C temperature UFP 1001 Powder Resin  has a storage life of approximately 12 months. UFP 1001 Powder Resin should be stored in a cool and dry place away from direct sunlight, high temperature and high humidity. Heat and moisture will cause the powder to harden and become useless. Direct sunlight renders UFP 1001 unusable rapidly. Therefore it should not be stored in the open.

Once a container has been opened, the contents should be used up as soon as possible. On cases where there is left over powder, secure bag to avoid exposure to the environment. UFP 1001 Powder Resin should remain usable up to one year or longer. Maximum storage life is attained when UFP 1001 Powder Resin is stored under cool and dry conditions. The IWPH 101 can be kept for indefinite time as long as it is not exposed to humidity.

 

PACKAGING AND SHIPPING INFORMATION.

We at PT Intanwijaya Internasional Tbk produce our UFP 1001 Powder Resin in the following packages; 

 25 Kg

Packed in woven polypropylene bags (WWP bag) or paper bag with double inner polyethylene liner, heat seal.

 18 MT 20 FT Container
 
 

PLYWOOD MANUFACTURING APPLICATION


UFP 1001 Powder Resin is specially formulated for the manufacture of interior grade plywood. When it is used correctly, it has excellent pre-pressing characteristics with a resulting bond that is highly resistant to moisture, molding and staining.

 

STANDARDS

The optimal quality of UFP 1001 complies with the folowing international standards of plywood manufaturing;

 UK standard
: - BS-1455, 1972
    Moisture Resistant Grade (Knife Test) 
   - BS-6566, Part B, 1985
    Moisture Resistant Grade (Shear Test) 
 US commercial standard
: CS-35 Type II
 Japan agricultural standard 
: JAS Type II

 

SUITABLE FILLER AND HARDENER

The recommended filler is industrial grade wheat flour. The flour used should be fresh with unmodified fine particle size and of medium water taking capacity and of low ash content. For hardener we recommend IWPH 101, a hot pressing hardener formulated for use in conjunction specifically with UFP 1001.

 

DIRECTIONS FOR HOT PRESSING UFP 1001 WITH HARDENER IWPH 101 FOR PLYWOOD MANUFACTURE

RECOMMENDED FORMULATION

The following formulation is recommended for optimum bond quality at an acceptable cost level;

 UFP 1001
: 100 parts by weight
 Industrial grade wheat flour as filler 
: 30-50 parts by weight *
 IWPH 1001 hardener
: 3-5 parts by weight
 Water: 125-135 parts by weight * 

Note: * means that it is subject to variations in the water taking capacity of the wheat flour, the above formulation may have to be adjusted appropriately for optimum viscosity and pot life.

The above formulation will have the following properties;

 Pot life, at 30°C 
: 4 hours minimum 
 Ideal glue mix viscosity, at 30°C 
: 1,800-2,200 CPS 

Our technical service personnel will be glad to any further assistance in the usage of our products.

 

MIXING PROCEDURE

The above formulation should be mixed according to certain steps as follows;

  1. First pour 2/3rds of the required water into the mixer followed by all of the UFP 1001 and start the mixer.
  2. After mixing for a few minutes, add all required filler and continue mixing until all the lumps smooth out.
  3. Last, add the remaining water and all the IWPH 101 hardener and mix for another 2-3 minutes. The mix is then ready to be spread.

 

GLUE SPREAD

Glue amount for glue spread requirement depends heavily on factors such as veneer texture, thickness, temperature, moisture content and porosity. ambient temperature and humidity, assembly time and pre-press time. Generally a higher spread is required when veneers are rough, thick and warm. This is also true when the assembly time is excessively long. Optimum spread values should be determined by practical trials.

The following schedule may be used a guide only;

 Core thickness 
 Glue spread (SGL)
 lbs/1000sqft 
 g/sqft 
 Below 1.8 mm
 29-35 13-16
 2.1-2.5 mm
 33-39 15-18
 3.2-3.8 mm
 38-40 17-20
 4.2-5.0 mm
 40-46 18-21

Note: It's strongly recommended that glue spread be checked at regular intervals per production day. This could be achieved by spreading core veneers and determining resin pickup by weight difference.

 

PRE-PRESS

As a guide, a pre-press period of 9-12 minutes is often satisfactory. Normally a specific pre-pressing pressure of 10-15 kg/cm2 should suffice. During pre-press it's often necessary that caulk boards be placed within the load and spread about 12 inches apart. After pre-pressing the panel should be hot-pressed immediately or dead-stacked for no more than 30 minutes (refer to closed assembly time) before hot pressing. When panels are dead-stacked, it's recommended that the top panels be weighed down by caulks to prevent possible curing on face veneers.

 

PANEL ASSEMBLY TIME

Open Assembly Time

This is the time period from glue spreading onto the veneers; to the time when the assembly is cold pressed. For optimum results in bond strength, it is recommended that open assembly time should not exceed 30 minutes. This could be achieved by setting open assembly time to a constant time, say 25 minutes, rather than allowing it to vary by keeping the number of panels assembled constant. The latter would lengthen the assembly time when core veneers are loose.

Closed Assembly Time

This is the time period between immediate completion of cold pressing and the beginning of hot pressing. For optimum bond results, this time should be kept to minimum, preferably less than 30 minutes.

 

HOT PRESSING - LOADING TIME

This is the time period elapsing between placement of the first panel assembly in the press and the application of full pressure to the whole press load. To avoid any risk of pre-curing, loading time should be kept as short as possible, preferably no more than 2 minutes. The glue must still be tacky, hence capable of flow prior to application of full pressure.

HOT PRESSING - PRESSING PRESSURE

The required specific pressure on the plywood panels depends on factors such as  panel thickness and veneers species and texture. The following time allocation may be used as a guide;

 Plywood thickness (mm) 
 3-6 9-16 18-25
 Specific pressure on plywood (kg/cm2) 
 9-11 
 10-12 
 12-14 

HOT PRESSING - PRESSING TEMPERATURE AND TIME

The required press time for each type of construction may vary according to such factors as the number of plies that make up the panel, thickness of veneers used, wood acidity and platen temperature. The following temperature allocation may be used as a guide to determine the actual time required;

1. Basic time

 Press temperature
 100°C  110°C 120°C
 Basic setting time (minutes) 
 1.5 
 1.0 
 0.75 

2. Heat Penetration Time (minutes/mm)

 Distance to the deepest glue line 
 Glue spread (SGL)
 100°C 
 110°C 
 120°C 
 Below 4 mm
 1.0 0.9 0.8
 4-6 mm
 1.2 1.1 1.0
 Over 6 mm
 1.4 1.3 1.2

Caution: Do not use higher hot press temperature to attain shorter pressing time period unless the veneers' moisture content are carefully controlled. always remove panels as soon as the press opens.

The recommended core veneer moisture content is: minimum 6%, optimum 8-10% and maximum 14%.

 

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