How is the quality of \”supervision\” wooden doors? Sampling inspection results: These 6 batches were unqualified

Wooden doors are essential for home decoration. What is the quality of your wooden doors? The Municipal Quality Supervision Bureau today released the quality inspection results of 30 batches of wooden door products produced and sold in this city: 6 batches of wooden composite doors from Shanghai Pudong Shenhong Wood Products Co., Ltd., solid wood composite doors from Shanghai Pinmei Wood Industry Co., Ltd. The products were unqualified, and the unqualified items involved were formaldehyde emission (2 batches) and material (4 batches).

Shanghai Wooden Door Products in 2017

Quality Supervision Spot Inspection of Unqualified Products

Interpretation of unqualified items

Formaldehyde release

Formaldehyde in wooden doors The release mainly comes from the formaldehyde release of the artificial board itself in the wooden door and the formaldehyde release of the adhesive used to bond the wooden materials.

During this supervisory inspection, it was found that 2 batches of products had unqualified formaldehyde emissions.. Among them, the formaldehyde emission of one batch of wooden composite doors exceeded the limit value more than 2 times, and the formaldehyde emission of the other batch of solid wood doors was not up to standard, mainly due to the use of inferior materials. Caused by puzzle glue.

Because the size of solid wood doors is quite large, they often need to be joined from several solid wood panels during the production process, and a certain amount of adhesive is used. This adhesive is commonly known as \”Piecing Glue\”. Good-performing panel glue generally does not contain formaldehyde, while some inferior panel glues use urea-formaldehyde as raw materials, resulting in the production of solid wood doors with excessive formaldehyde.

Solid wood door structure diagram

Use adhesive at splices and tenon joints

Material

The material is unqualified, mainly because the product name does not match the actual material, and there is a tendency to deliberately mislead consumers.

In this supervision and spot inspection, there are 4 batches of unqualified materials, of which 2 batches are labeled as Solid Wood Doors strong>, but its products only use explicit wood in the surface layer or frame, while the core material uses artificial boards such as plywood, density board, and particle board. Its products are actually solid wood composite Doors. There are also 2 batches of products labeled as Solid Wood Composite Doors, but the surface layer of their products is density board instead of solid wood veneer. Forwooden composite doors.

Samples with unqualified materials

It is labeled as \”red oak solid wood door\”. The actual surface and frame are oak, and the core material is other non-oak wood.

Timber and plywood

It is labeled as \”solid wood painted door\”, the actual surface layer is oak, and the core material is MDF, plywood and honeycomb particle board

It is nominally called \”solid wood composite door\”, but the actual surface layer is density board

Information: Market Quality Bureau of Supervision

Editors: Wu Zebin, Lin Xin