https://www.avient.com/resource-center?document_subtype=216&document_type=59&page=0
Guidance on the Consumer Product Safety Improvement Act (CPSIA) for small businesses, resellers, crafters and charities
https://www.avient.com/resource-center?document_type=59&page=44
Guidance on the Consumer Product Safety Improvement Act (CPSIA) for small businesses, resellers, crafters and charities
https://www.avient.com/resource-center?document_type=59&document_subtype=216&page=0
Guidance on the Consumer Product Safety Improvement Act (CPSIA) for small businesses, resellers, crafters and charities
https://www.avient.com/sites/default/files/2020-08/colormatrix-flexcart-micro-liquid-metering-system-flyer.pdf
The
FlexCart Micro unit is designed to operate on non-
continuous processes that require small units and which
run with lower process throughputs.
OPTIONAL EQUIPMENT
The FlexCart Micro unit can be configured with a large
range of equipment options.
The FlexCart Micro unit,
due to its smaller footprint and reduced throughput
range, is designed to work with the LN molded polymer
containers—specifically the 10-liter pack.
https://www.avient.com/sites/default/files/2020-08/colormatrix-flexcart-mini-liquid-metering-system-flyer-1.pdf
Using many
technology options from the larger FlexCart flagship unit,
the FlexCart Mini unit allows you to access complex metering
systems while reducing size.
OPTIONAL EQUIPMENT
The FlexCart Mini unit can be configured with a large range
of equipment options.
The range of sizes suitable for the FlexCart Mini metering
unit are at the larger end of the PlanetPak range—25L
and 15L containers.
https://www.avient.com/sites/default/files/2023-11/Cesa Clean Processing Usage Guide.pdf
GUIDELINES FOR USING CESA CLEAN ADDITIVES
• Cesa Clean works best when molded maintaining normal (injection)
pressure/shear
• For best results, Avient recommends a “Running Color Change”
which eliminates breaks in the molding cycle
• Since the Cesa Clean concentrate will expand, it is recommended
to reduce the shot size by 20%
• It is designed for use at a let-down ratio (LDR) of 3.0% or (33:1); however,
use rate can vary depending on the severity of the contamination but
typically is 2.0–4.0% (a use rate higher than 6.0% may not have any
positive affect on the cleaning performance)
• Using Cesa Clean as a routine part of your color change rotation will
allow faster changes and consume a minimal amount of raw material
- Note: If the manifold is not cleaned routinely, this process may be
more time consuming and additional material will be required
• It is best to process at your normal polymer processing temperatures
- For best performance, stock temperature should be at least 400°F
- If 400°F is achieved during the purging process, no additional
activation will occur during the reprocessing of regrind
- All parts produced during the “Running Purge Cycle” should be
captured as regrind, resulting in a scrap-free color change
- If using sequential gates, open and close all gates at the same time
while purging the tool
- If contamination appears to be coming from one gate, open and
close first, and for an extended period of time, to force more material
through this location
- When cleaning in this manner, pay close attention to shot size
- Parts containing the previous or new color plus any Cesa Clean
can be used as regrind
INTRODUCING CESA CLEAN TO YOUR PROCESS
Hand Blend
• Hand weigh enough of the Cesa Clean and
natural resin mix to equate to 3–5 times the
barrel capacity
• Use rate should be 3.0% or 33:1 for routine
cleaning
• For difficult-to-clean tooling, or tooling which
is not routinely cleaned, start at 4.0% or 25:1
• Note: Do not attempt to vacuum load more than
15 feet from source as stratification/separation
may occur
Volumetric Feeder
• Calibrate feeder to dispense 3.0% or 33:1 for
routine cleaning
• For difficult-to-clean tooling, or tooling which
is not routinely cleaned, start at 4.0% or 25:1
• This style of feeder is highly recommended for
at-the-throat metering of Cesa Clean
Blending Units
Most blenders have an extra bin for an additive
• Fill the additive bin with Cesa Clean
• Set blender to introduce the Cesa Clean at
2.0 to 4.0%
• Note: Do not air convey any further than 15 feet
as Cesa Clean has a high density and may separate
from the mix.
GETTING STARTED
TIMING IS THE KEY TO A RUNNING
COLOR CHANGE
Hand Blend
• Have the purge blend ready to load
• If hopper contains a mixture of resin, color and/
or regrind, it should be run dry or drained before
beginning the color change, keeping the screw
full so press cycle continues
• Run the main resin hopper dry or shut off hopper
to hand feed at the throat
• Once press is clean, slide hopper in place
and proceed with next color-resin blend
• The next color can be added while Cesa Clean is
still in the barrel
• When splay is no longer visible in parts, reset shot
size, parts should be ready to pack
(Single) Volumetric/Gravimetric Metering Unit
at the Throat
• Empty and clean feeder while press continues
to run
• Add Cesa Clean to the feeder color hopper and
calibrate to a 3.0% use rate
• When press is clean, start next color
• When splay is no longer visible in parts, reset shot
size, parts should be ready to pack
• Note: If an open/unused secondary feeder is
installed, use it for the Cesa Clean concentrate
Central Blending Unit
• Thoroughly clean unit while continuing to mold
parts, keeping a resin feed to the press
• Using a clean open hopper or regrind hopper, add
the Cesa Clean concentrate
• Set blender for additive/color to 3.0%
• Once press is clean, drain hopper and/or central
blending unit while continuing to mold parts
• Begin new color and continue to mold parts
• When splay is no longer visible in parts, reset shot
size, parts should be ready to pack
Process Adjustments That Can Help
• Increase back pressure
• Increase screw speed
• Increase injection speed (in some tools maximum
injection speed can facilitate cleaning)
• Reduce mold close time (faster cycle)
• Always remember a stock temperature of 400°F
is essential
When press and tool are clean, return all settings to
standard production process profile.
https://www.avient.com/sites/default/files/resources/Overmolding_of_Thermoplastic_Elastomers_Engineered_solutions_for_consumer_product_differentiation.pdf
Specialized
machines, which have two or more injection units, are used, as shown in Figure 1.
The table rotates or shuttles to the next station where the
TPE is injected using another horizontal or vertical injection unit.
For the rotary unit, a third rotation moves the table to an “off-load” station where the
completed two component part is ejected.
https://www.avient.com/sites/default/files/2023-05/case-study-piranha-propeller.pdf
This often causes additional damage to
the motor’s lower unit, costing up to several thousand
dollars to repair.
At higher impacts, the blades,
which have lower shear strength than metal, sacrifice
themselves by breaking and releasing energy before
transferring damaging forces to the motor’s lower unit.
Changing a damaged or broken blade is more cost-
effective than replacing an entire propeller—or even
worse, a lower unit—due to underwater impact.
https://www.avient.com/products/thermoplastic-elastomers/tpe-knowledge-center/technical-bulletins/specific-gravity
The TPE industry uses the standard units of cubic inches or cubic centimeters.
For an annual number of units required of 500,000 parts per year, a buyer would require the following pounds of material excluding runner system and scrap (454 g/lbs conversion factor):
https://www.avient.com/sites/default/files/2024-11/Terms and Conditions of Sale for Canada.pdf
In no event shall Seller have
liability to Buyer for any incidental, consequential, indirect,
exemplary, punitive, special damages or loss of revenue,
business, goodwill or reputation.
If
Buyer has a dispute with respect to an invoice, Buyer must notify
Seller within seven (7) business days after the date of invoice.
The United Nations Convention respecting
Contracts for the International Sale of Goods shall not apply to sales
under these Terms.
21.