Inspection standards and
methods for plastic water cups of Zhejiang Huajian Commodity Inspection Co.,
LTD
Zhejiang Huajian Commodity Inspection Co.,
Ltd. is a third party inspection company, engaged in agent inspection, foreign
trade inspection, business trip inspection, factory inspection, production
tracking, container loading supervision. Our aim: safety, rest assured,
commitment.
Water is the source of life, water can
promote human metabolism, help sweat, regulate body temperature, drinking water
has become a lifestyle. In recent years, there have also been innovations in
water cups, such as the "big belly Cup", an online celebrity cup, and
the recently popular "Ton ton bucket". The "big belly cup"
is popular with children and young people because of its cute shape, while the
"Ton ton bucket" is innovative in that the bottle is marked with time
and water volume scale, which is convenient to remind people to drink water in
time. As an important drinking tool, how to choose when buying it?
Main material of food grade water cup
When purchasing a water cup, the most
important thing is to see its material, which involves the safety of the whole
water cup. The common plastic material on the market mainly has 4 kinds: PC
(polycarbonate), PP (polypropylene), tritan (Tritan Copolyester copolyester),
PPSU (polyphenylsulfoxide).
1. PC material
PC itself is not toxic, but PC
(polycarbonate) material is not resistant to high temperature, if heated or in
an acid, alkaline environment, easy to release the toxic substance bisphenol A.
Some research report shows that bpa causes endocrine disorders, cancer,
metabolic disorders caused by obesity, are becoming is likely to be associated
with bisphenol A, many countries such as Canada and early ban bisphenol A is
added in the food packaging, and by 2011, China has banned imports of baby
bottles and sale of PC material.
If you choose PC water cups, please buy
them from formal channels to ensure their production compliance. Personally, it
is not recommended to buy PC water cups.
2. PP material
PP polypropylene, colorless, odorless,
non-toxic, translucent, does not contain bisphenol A, flammable, melting point
165℃, at 155℃ or so will soften, the use of temperature range of -30 ~ 140℃. PP
tableware and cups are also the only plastic material that can be used for
microwave heating.
3. Tritan material
tritan is also A chemical polyester that
solves many of the ills of plastics, including toughness, impact strength,
hydrolysis stability, chemical resistance, high transparency, and does not yet
have the bisphenol A found in PC. tritan has been certified by the Food Contact
Notification (FCN) No.729 by the United States Food and Drug Administration,
and is the designated material for infant products in Europe and the United
States
4. The PPSU material
PPSU (polyphenylsulfoxide) material is an
amorphous thermal plastic, high temperature resistance 0℃~180℃, can be
filled with hot water, has high permeability, high hydrolysis stability, is
able to withstand steam disinfection of children's bottle material, does not
contain carcinogenic chemical bisphenol A.
For the safety of yourself and your family,
please purchase the water cup from the formal channels, and carefully check the
material composition when buying, which can be known from the following basic
parameters:
Method for inspection of plastic food grade
water cups
"Big belly cup", "ton ton
bucket" and other water cups are made of plastic, and the common defects
of plastic products are as follows:
Miscellaneous point (containing impurities)
: Having the shape of a point, measured with its maximum diameter as its size.
Rough edge: A linear bulge on the edge or
binding line of a plastic part (usually caused by poor molding).
Silver wire: Gas formed during molding to
fade the surface of plastic parts (usually white). Most of these gases
Is the moisture in the resin, some resins
are easy to absorb moisture, so a drying process should be added before
manufacturing.
Bubble: A barrier inside a plastic that
creates a circular protrusion on its surface.
Deformation: Deformation of plastic parts
caused by differences in internal stress or poor cooling during manufacturing.
Top WHITE: Whitening and deformation caused
by EJECTING the finished product out of the die, usually at the other end of
the slightly EJecting end (the mother die surface).
Lack of material: Due to mold damage or
other reasons, the finished product is not saturated and lack of material.
Broken printing: printing due to impurities
or other reasons caused by white spots in the printed font.
Missing printing: printing content missing
scratches or corners or fonts broken printing defects greater than 0.3mm, is
also considered to have missed printing.
Color difference: refers to the actual part
color and admitted sample color or color number of the comparison beyond the
acceptable value.
The same color point: refers to the color
and the part color is close to the point; Otherwise, it is a heterochromatic
point.
Streaks: Streaks of hot - dissolved plastic
left at the gate as a result of forming.
Weld mark: A linear mark on the surface of
a part caused by the convergence of two or more streams of molten plastic.
Assembly gap: A gap caused by the assembly
of two components in addition to the gap specified in the design.
Fine scratch: A surface scratch or mark
without depth (usually caused by manual operation).
Hard scratch: A deep linear welt on the
surface of a part caused by a hard object or sharp object (usually by manual
operation).
Dent shrinkage: The appearance of a dent on
the surface of a part or the size is less than the design size (usually due to
poor molding).
Color separation: Streaks or spots of color
in the flow zone of plastic production (usually caused by the addition of
recycled material).
Invisible: IF THE DIAMETER OF THE DEFECT IS
LESS THAN 0.03mm, IT IS NOT VISIBLE, EXCEPT FOR THE TRANSPARENT AREA OF THE
LENS (ACCORDING TO THE DETECTION DISTANCE SPECIFIED BY THE MATERIAL OF EACH
PRODUCT).
Bruise: The surface or edge of the product
is hit by a hard object.
The above belongs to the appearance
inspection of plastic water cup, identify the quality of water cup, but also
need to carry out functional inspection
