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Path: Sourcing News & Advice
>> Import from
China Advice >> Inspection limitation for glued
products

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Inspection limitation for glued products

Posted: November 26, 2014

by Asia Quality Focus team

During an inspection, a battery of on-site tests are performed in
order to check the conformity, functionality and usability of a product. Some
tests are more or less reliable as other factors can influence the result of the
test within the time. An inspection limitation for glued products is regularly
observed. The reasons and solutions are detailed in this article.

On-site tests for glued products during an
inspection

The on-site test for glued products is usually related to the
abuse test. This means that the QC inspector will put the product into the
condition of an “angry” customer, using with force and sometimes violence on the
product on a special level sample size based on the AQL table.

Inspection limitation for glued products

When performing an inspection, the products have been freshly manufactured
therefore the glue is usually at its top level of efficiency. This means that
the abuse test can pass quite easily as far as the supplier as well glued the
product in the right areas.

However, with the time, the quality of the glue can show weaknesses. If the
supplier uses a low quality glue or an inappropriate one (for instance the
supplier uses a glue for leather to stick two papers, or uses a glue for paper
to stick silicone and metal parts together) the defect may not appear just after
the inspection but will appear later on.

The only way to make sure a glued product will last long enough is to make a
life test in a laboratory. The common standard, used for shoes in general
is EN12749 which tests the humidity aging 70?/ 100%RH for 7 working days
approximately. The price of such test is estimated to 25USD/day This test
simulates time conditions, i.e. 1 month, to see if the product is still well
glued afterwards.

Only a laboratory can verify if a glue will glue well after some
time.

Examples of products which may face glue quality issues
at arrival of the goods:

Silicone USBs: the memory card is sticked to the silicone molded shape
with glue.

Paper bags: the paper bags are closed with glue. It can be totally be
unglued at the opening of the export cartons in the country of
destination.

Tablet cases

And
you: did you ever experience glue
quality issues after receiving your goods?

Read the original article here.

The
Asia Quality Focus
team is an international team of specialists in product inspections, factory
audits, lab testing and product certifications for all kinds of consumer goods.
To share experience and opinions in how to better and safer source in Asia they
created the Quality Control
Blog. Feel free to contact them here.

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