Jumbo Large format Film Face Plywood
Large format Birch Hard Wood Film Face Plywood

Eximcorp offers large format of High performance Birch hard wood film face Plywood in the range of user sizes such as 6000mm x 2000mm, 5000m x 2000mm or 4000mm x 2000mm in thickness 15mm to 21mm to cater to the needs of rarest of the rare application of fair finish concreting.

Large format of Plywood can be made in two different processes namely scarf jointing the finished Plywood or scarf jointing the each veneer sheets in a mechanised process used in the assembly of the Plywood and later hot pressing the veneers in a large format hot press of 6 meter x 2 meter under high pressure to compress the Plywood by at least 12% to 15% for consistency of adhesion between several layers of veneers. The compression of veneers leads to increase in density from 670kg/cbm to 780 kg/cbm necessary to achieve the sound bonding throughout the sheet.

Large format Film Face Birch Plywood having a minimum 220 GSM Phenolic film has been designed to suit any and every application needs of construction industry where durability, versatility, high bending strength, rigidity, stability, accuracy and tolerance to humidity parameters of performance value are critical. Depending on the user’s option, 220 GSM film can be multiplied to achieve 440 or 660 GSM also.

Key features and benefits

• Uniform and homogenous surface
• Waterproof, dimensionally accurate & stable.
• Strong and medium density
• 100% natural scarf jointed whole piece or spliced Birch Veneers of 1.4mm thickness throughout the plywood,
• Meets European E1 formaldehyde emission requirements (EN 120:1992) and also California ARB regulation P2
• Seamless fair finish concrete surface without any joints in the large concreted areas,
• Highly wear resistant,
• Impact resistant
• High elastic modulus and bending strength
• High flexural strength
• Resists commonly used chemicals (alkali, diluted acids, organic solvent)
• Additional surface protection in concrete block production
• Free from delamination risks,
• No need for secondary putty repairs of concreted surface and grinding
• Resistance to temperature variation: through a range of -40°C to +50°C (-40°F to +122°F), comes in a variety of thicknesses and sizes.
  

Availability options:

Birchply™ Film face Birch Plywood is made in a range of thickness from 15mm to 21mm.

This large format Plywood is available with prior arrangement requiring a minimum 4 months to deliver against confirmed orders only.

Technical Specifications and Declaration of Performance consistent with Regulation (EU) No. 305/2011 for construction products.

Distinctive Performance Properties of Jumbo Birch Film Faced Plywood

Thicknesses tolerances and weight of Large format Birch Hard Wood Film Face Plywood

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Effect of humidity and moisture

• Wood veneer is a living material and is subject to moisture movement according to surrounding conditions, which affects the flatness of panels. It is important to condition the panels to reach a moisture content near to the equilibrium of their permanent environment.

• Like other wood-based panel products, Birch Plywood is also hygroscopic and its dimensions change in response to a change in humidity. A change of 1% in moisture content typically increases or decreases the length, width and thickness by 1% in dimensions and thickness. It is therefore desired that the edges are sealed with a suitable acrylic paint to prevent and/or control ingress of moisture and humidity and consequent swell in thickness and expansion in dimensions.

• The recommended stocking conditions are 20°C and a RH of air of about 60%.

Storage conditions:

When first exposed to the prevailing weather conditions at Site and during the early uses of the boards, there is likely to be some localised swelling of the wood veneer caused by moisture pickup, which may leave impressions in the face of the concrete. To prevent this:

• Store the panels in dry conditions, flat on a level surface, off the ground and direct sunlight, preferably indoors or under the shed.

• Panels should be store horizontally on a firm base with enough bearers to prevent sagging.

• The stacks should be covered k to protect top and edges from moisture penetration as fluctuations in temperature and humidity may cause panels to distort.

Safe Handling

Film faced plywood sheets are very slippery; sliding panels may lead a whole stack to collapse. Remember, separate sheets must be moved manually by two persons.  Panels must not be pulled or pushed on the floor or ground. Handling plywood requires general safety procedures and proper equipment. Handling should be kept to a minimum, and for speed and efficiency, mechanical handling devices should be used whenever possible. When taking a panel from a pack or a stack, it must be lifted, not pulled over the surface of the bottom panel, because any hard particle (sand or film particle) between panels can lead to damage of processed or coated surfaces.

Preservatives

Large format Film Face Plywood is made from natural Birch wood Veneers and is free from any toxic chemicals except resin. As is common knowledge, all wood products are susceptible to insects or termites and/or borers present in different climatic zones in the soil or buildings. It is recommended that the users are applying the coat of suitable chemicals or insecticides on all exposed surfaces of wood in addition to treatment of masonry foundations of the building where the Wood products are required to be use. Fipronil emulsified concentrate at about 3% is one such chemical and effective deterrent against insects and pests or termites in tropical climate zones. However, the application should be in accordance with manufacturers guidelines for effective results. Users own discretion in selection of appropriate chemical and its doses or frequency of such treatment is advised for satisfactory results in the light of experience gained over the period of time.

Reuses

Typical number of reuses is likely to be in the range of 15-20 times, depending on the surface GSM of the film varying between 220 GSM to 660 GSM. However, this will vary according to many different factors including good site practice, the required concrete finish, the amount of care taken when compacting the concrete, handling and storage of panels, type and quality of release agent used on the panels before concreting. The experiences have shown more than 100 uses also when used in the formwork system, type and quality of release agent, good site practices and proper care in handling before and after concreting.

The number of times the plywood can be reused is only intended as an approximate guide. It does not imply any form of warranty. The actual number of reuses will depend on several factors other than the plywood.

Design Data

LOAD RESISTANCE q [kN/m2] AND CORRESONDING DEFLECTION u [mm] VALUE FOR BIRCH FILM FACE PLYWOOD TO BE USED IN THE DESIGN OF CONCRETE FORMWORKS***

Load resistance for a uniformly distributed load on a continuous plate strip with three equal span lengths. Face grain parallel to span

Span	Nominal thickness (mm)
c/c		9				12				15				18				21				24
mm	q		u		q		u		q		u		q		u		q		u		q		u
100	123	s	0.3		166	s	0.3		193	s	0.2		234	s	0.2		263	s	0.2		303	s	0.2
150	82	s	0.8		111	s	0.6		129	s	0.4		156	s	0.4		176	s	0.3		202	s	0.3
200	61	s	1.6		83	s	1.1		97	s	0.8		117	s	0.7		132	s	0.6		152	s	0.5
250	46	b	2.7		67	s	2.0		77	s	1.4		94	s	1.1		105	s	0.9		121	s	0.8
300	32	b	3.7		51	b	3.0		64	s	2.2		78	s	1.8		88	s	1.4		101	s	1.2
350	24	b	5.0		38	b	4.0		55	b	3.4		67	s	2.6		75	s	2.1		87	s	1.7
400	18	b	6.4		29	b	5.0		42	b	4.2		58	b	3.7		66	s	2.9		76	s	2.4
500	12	b	9.8		18	b	7.6		27	b	6.4		37	b	5.5		49	b	4.9		61	s	4.3
600	8	b	13.9		13	b	10.8		19	b	8.9		26	b	7.7		34	b	6.8		43	b	6.1

Short-term loading Service Class 3 kmod = 0.70 kdef = 0.40 γq= 1.2 γm = 1.3 q given in kN/m2 u given in mm grain direction of surface veneers

Load resistance for a uniformly distributed load on a continuous plate strip with three equal span lengths. Face grain perpendicular to span

b = bending strength limitation
s = planar shear strength limitation

Short-term loading Service Class 3 kmod = 0.70 kdef = 0.40 γq= 1.2 γm = 1.3 q given in kN/m2 u given in mm grain direction of surface veneers

*** Obtained from Handbook of Finnish Plywood covering Birch Plywood FFP (Page  54)

Disclaimer:

Eximcorp India Pvt Ltd, does not assume any responsibility or admits any liability whatsoever for the number of uses or re-uses or repetitions or damages to the sheets or concrete surface quality for reasons not attributable to manufacturing defects or for several other factors affecting the performance of the product. In the event of any occasional delamination in excess of the AQL (Acceptance Quality Level) of 3% established by the trade practices and also so declared by the seller hereby, the replacement of delaminated sheets or the surface area so observed shall me made expeditiously by the Seller or refund of value thereof as soon as possible without any further or other consequential or other losses.

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