Thursday, October 17, 2019

Bamboo Core

Bamboo Core 1 140x140

Bamboo plywood has gained a lot of attention recently, especially among “green” building professionals and architects. Bamboo is a large woody grass that yields many harvests over its typical 25-50 year life cycle. In addition to being a rapidly renewable resource, bamboo plywood is also very strong, durable, and attractive, making it ideal for a wide range of uses including countertops, cabinets, desks, shelving, architectural panels, and much more.

Marine Grade Core

marine grade plywood 140x140

Marine-grade plywood is available in a domestic PS 1-95 (American Plywood Association) or BS1088 (British Standard Institution) standards. Marine-grade plywood made to the PS 1-95 is generally available in Douglas-fir. The grade of all plies of veneer is B or better, which means it may have knots, but no knotholes. Repairs are allowed and it is typical to see football plugs on the faces and backs of most Douglas Fir Marine Grade plywood. Besides the poor visual appearance of the plug, that area tends to be structurally inferior to other areas that have not been repaired, especially for thinner sheets of plywood. The panels are sanded on both faces. The maximum core-gap size permitted is 1/8 inch, which also reduces structural performance. It is nearly impossible to get A-A grade Marine Fir these days. Most US mills produce AB due to the quality of logs that are available.

Marine-grade plywood made to the BS1088 standard is typically available in Okoume, although, Meranti, Sapele, Agba, Khaya, Makore, Moabi, Movingui, Sipo-Utile and other African and Southeast Asian species have been used. Permissible species must meet the durability requirements within the standard.

Tropical Hardwood Core Marine Grade 140x140BS1088 calls for the same tropical hardwood specie to be used throughout the panel; exterior glue (melamine or phenolic) for the core; no repairs on the faces; no core gaps or overlaps. BS1088 also requires an odd number of plies to be used. Regardless of the type of application, using BS1088 plywood is by far easier to work with and priced competitively to the fir option.

Honeycomb Core

HoneyComb Core 140x140Honeycomb Core panels are a tough, lightweight material that provides efficient and optimum mechanical performance in composite sandwich structures. Honeycomb is an excellent alternative to traditional core materials such as plywood, balsa and foam used in the manufacturing of consumer and industrial products. Available in a wide range of sheet sizes and facings. Honeycomb panels are engineered for ease of use in many mainstream manufacturing processes, is readily available and can be modified to meet specific requirements for strength and stiffness. Honeycomb panels provide properties used in many composite sandwich structures that require core shear and compression along with performance. Honeycomb panel cores can be made from paper, polypropylene, aluminum, cardboard, foam and many others.

OSB Core

OSB Core 140x140

OSB Core (orientated strand board) plywood is a variation of the standard veneer core plywood. This type core typically has a cross band just below the top surface to help prevent telegraphing of the core to the top surface.

Foam Core Panels

Foam Core 140x140

Foam Core panels are a specialty panel designed to be used where weight or insulation is of importance. These panels are 50% to 80% lighter than conventional veneer core, particle core or mdf core panels. Foam Core panels are constructed by capturing a polystyrene foam core with higher density face panels to provide a strong lightweight panel with structural integrity. One is an extruded polystyrene foam (xpf) that is closed cell in structure and provides a consistent and uniform surface to machine. The other product is expanded polystyrene foam (epf) with a slightly lower density. Foam Core panels are typically no less than 3/4" thick and can go up to 6" in thickness or more as needed.

Product applications include: shelving, partitions, ceiling panels, wall systems, signage, displays, theater props, swing doors, elevators, kiosks, movable food carts, table tops, furniture, cabinets, motor homes, boats and aircraft.

 

Melamine

melamine

Melamine plywood is a thermally fused, resin saturated paper finish over a particle board core. It is highly stain and abrasion resistant. Melamine is not the name of the paper finish; it's the name of the resin used to impregnate the paper liner (chemically C3H6N6). This material comes in a wide variety of solid colors and simulated wood grains. Melamine panels are highly stain and mar resistant, and  commonly used in the cabinet industry for interior cabinet construction. Depending on the grade of melamine, it can be brittle or soft, coarse or smooth. Typically, the higher grades of melamine are more brittle and will chip during machining but have a thicker surface and greater resistance to abrasion. Typically melamine has a particle board core, however it is also available with a MDF core.

 

Veneer Core

veneer-core

Veneer Core plywood consists of a center veneer and crossband veneers alternately layered on both sides of the center to the desired thickness producing an odd number of veneers for the core. The weight-bearing strength of Veneer Core plywood is excellent along with its bending strength and screw-hold ability. Veneer core panels are lighter in weight than any other core type.

Particleboard Core

particleboard-core

Particleboard Core panels are constructed similar to MDF Core panels, with the face & back veneers glued directly to the core. Particleboard Core lays flat like MDF, but does not have the screw-hold strength of other cores. Particleboard Core is the least expensive of all core types.

MDF Core

mdf-core

Medium Density Fiberboard Core has the most uniform thickness and consistency of any panel core. The face and back veneer are glued directly to the MDF Core without the need for a crossband veneer. The consistency in thickness and flatness makes MDF Core panels the preferred choice for 32mm construction.

Lumber Core

lumber-core

Lumber edge glued into a solid slab is considered Lumber Core. Lumber Core plywood is most often found in the construction of import panels, usually only 18mm thickness panels. Lumber Core plywood consists of a face & back veneer, then a layer of crossband veneer, with the edge glued lumber in the center. Lumber Core plywood should be used for the bending strength and screw-hold ability. The ability of Lumber Core plywood to bounce back makes it an excellent choice when constructing long or wide shelves in cabinets or closets.

Page 1 of 2
Web Statistics