Japanese Innovation / Mechanical Purging

ASACLEAN R Series

Q: What are the RU and RE temperature ranges?

Per manufacturer data, ASACLEAN RU runs at 180–330°C and ASACLEAN RE at 160–300°C.

Q: Can I trial RU/RE before switching?

RU and RE samples are available subject to machine and job fit, with CSC trial support.

New rheology innovation — for faster, cleaner purging safer for machines than ever

Built to lift color changes, resin changes, cut residue, and make purging easier to control in injection molding and extrusion

Request RU / RE trial samples Consult R-Series selection See the grade comparison table

SaferMechanical purge, not chemical reaction

FasterDesigned for better flow control

CleanerLess residue, pulls residue off walls

Rheology ControlFrom plug flow to wave flow sweeping walls and pulling residue out

Control flow More shear Better wall contact Pull residue out Lower residue

Problem First

Why is conventional purging not enough?

Factory problems never come from old color alone — they come from flow, wall adhesion and in-machine build-up

Old color exits slowly

Old material still sits in dead spots and barrel walls, stretching rinse time

Specks / intermittent carbon release

Baked residue degrades under repeated heat and breaks off in episodes

Purged but still long rinse times

Some purging compounds carry high residue or never leave dead zones

Hot Runner / gate / screw at risk

From harsher-than-needed grades or wrong path clearance

3D CROSS-SECTION VISUALTop: before use · bottom: after use

Top · before use

Bottom · after use

➜

Top: Flow never reaches walls; residue stays · Bottom: Continuous R Series wave flow builds wall contact and shear force

Rheology Innovation

Rheology means controlling flow behavior — not stronger chemistry

R Series uses flow power and mechanical shear to cut machine risk and make purging easier to control

Control flow More shear Better wall contact Pull residue out Lower residue

BeforeAfter

Flow ControlShear ForceWall ContactLow ResidueSafer Mechanical Cleaning

1. Old resin sticks to barrel walls

Heat-born residue and old color still on walls and screw roots

2. R Series enters the screw

Material designed to flow, press and spread more evenly

3. Even shear and pressure build

Right flow raises wall contact and lifts residue off walls

4. Purge exits with residue

Cleaner machine, easier next-job starts

R Series Overview

RU, RE and RX maker data

Temperature range, strengths and limits for each grade from Asahi Kasei

ASACLEAN RU

Balanced Cleaning / Low Residue

Balanced cleaning power and residue for varied resins and jobs

180–330°C range
Injection and extrusion supported
Hot Runner and sealing per terms
Minimum clearance 0.5 mm, 20 kg packs

RU grade data and TDS download →

ASACLEAN RE

Low Residue / Transparent Resin

Low-residue grade for transparent, free-flowing resins and natural-color changeovers

160–300°C range
Injection and extrusion supported
Hot Runner and sealing supported
Fits low-temp jobs, 20 kg packs

RE grade data and TDS download →

ASACLEAN RX

Top Cleaning / Glass Fiber

Maker data for a glass-fiber high-cleaning grade removing carbon

180–330°C range
Injection and extrusion, barrel section only
No sealing use
Never leave RX in the barrel at any temperature

RX grade data →

Asahi Kasei references: RU Grade · RE Grade · RX Grade
Compare with other grades: See all ASACLEAN grades in Grade Explorer

Grade Evolution

From U / newE to RU / RE

RU builds on U and RE builds on newE; RX is another R-Series product with Glass Fiber for carbon residue

Old grade	New grade	Temperature range	Fits
U	RU	180–330°C	General jobs, color change, engineering plastics, Hot Runner and sealing
newE	RE	160–300°C	Transparent, light-color, low-residue and low-temp jobs

Old grade

U180–330°C

newElow residue grade

New grades in Thailand

RU180–330°C

RE160–300°C

Visual Decision Tools

R-Series grade-selection graphs

RU, RE and RX* are shown with the manufacturer's product data

1. Cleaning Power vs Residue Level

Cleaning PowerResidue Level

RELow residue / good cleaning

RUHigh cleaning / medium residue

RX*Maker data

2. Recommended Use Case Matrix

Transparent / light colors

High post-purge sensitivity

General / daily color changes

Balanced cleaning and ease

Heavy residue / carbon / black specks

Consult CSC to match the grade to the residue level

RX*

Maker workflow data

RE is the low-residue grade

RX* → RE

3. Purging Strategy Flow

RURoutine Purging

Routine purges / general color changes

RELow Residue

Transparent jobs

RX*Official Product Info

Maker product data

RELow Residue Chaser

For the right workflow

PMShutdown / Sealing

RU or RE per job type

Deep Dive

Deep dive — ASACLEAN RU / RE / RX

Key messages, benefits and technical highlights for the product education page

ASACLEAN RU

Main general-purpose grade with high cleaning power and no glass fiber

RU suits plants wanting a broad grade that cleans well and stays machine-safe in suitable jobs

Injection molding including Hot Runner
Extrusion such as compounding and profile
Fits commodity and engineering resins
No soak time
Mechanical purge, not chemical reaction
Inorganic additives but no glass fiber

Temperature range180–330°C

Amount of purge1–2 system capacities

ClearanceSpecified clearance required

ResidenceMax 30 min residence at >280°C

ASACLEAN RE

Low-residue grade for transparent, light-color jobs needing post-purge cleanliness

RE suits jobs cutting post-purge residue — transparent, unreinforced and low-temperature resins

Low residue grade
Transparent, light-color and low-temperature resins
Injection molding including Hot Runner
Extrusion such as profile, sheet, blown film
No minimum Hot Runner gate clearance requirement
Fits as post-RX chaser

Temperature range160–300°C

Amount of purge1–2 system capacities

Soaking timeNot required

Inorganic additivesNot intentionally added

ASACLEAN RX · maker data

Top cleaning power for carbon contamination and baked-on residue

RX is Asahi Kasei product data for removing carbonized contamination and black specks, with Glass Fiber boosting removal

180–330°C range
Fits carbon and baked-on residue
Injection, barrel section only
Extrusion, barrel section only
No sealing use
No barrel residence at any temperature

Temperature range180–330°C

AdditiveGlass Fiber

ResidenceNo barrel residence

Machine Setting Guide

Tune machines right to run R Series at full power

ASACLEAN R Series is mechanical purge, so performance comes from controlling temperature, shear, pressure and machine-wall contact

Injection Molding Recommended Setting

Temperature: RU 180–330°C / RE 160–300°C; RX data 180–330°C
Back Pressure: Safe yet sufficient levels for barrel-wall press and contact
Screw Speed: Normal to fairly high levels within machine safety limits, for shear
Screw Position: Run the screw near full-forward for barrel sweep
RU / RE Residence: Above 280°C, never over 30 min in barrel
RX Residence: Maker data bars any RX barrel residence at any temperature

Extrusion Recommended Setting

Set temperatures inside the running grade range
Screw speed giving continuous stable shear within machine limits
Feed matched to actual flow — neither overload nor starving
RU needs ≥0.5 mm clearance and screens no finer than 100 mesh
RX is maker data — clearance must be checked with the team before use

Key note: Real settings shift with resin type, machine, temperature, residue state and hot runner / die / screen pack limits — cite the TDS and technical support advice before real use

Grade Selection Guide

Match R Series to your problem

Decision cards for first screening from site problems

Need a broad main grade

General color changes / routine purging / engineering plastics

Low residue after purging, transparent, light colors

Cut post-purge residue and move transparent

Carbon / black specks / heavy burn

Consult CSC to match the grade to the residue level

RX · maker data

ASACLEAN RX data

Plan a trial with the CSC technical team to assess the machine and flow-path limits

RX · maker data

Limited-clearance Hot Runner

RU min 0.5 mm; RE has no minimum-clearance term on the maker page

RU or RE

Routine Purging / Preventive Maintenance

Pick by resin, temperature and flow-path limits

RU or RE

Case Use Scenarios

Real-use scenarios

Dark-to-light change

RU → RE

RU for varied purging, RE cutting residue before light colors

Transparent resin jobs

Pick when post-purge low residue matters

Heavy specks or carbon

Consult the CSC team

Maker product data for heavy burn residue where the machine has no Hot Runner

Routine Purging

RU or RE

Pick by resin, temperature and acceptable residue

Technical Sales Consultation

Not sure whether your machine needs RU or RE?

Let ASACLEAN THAILAND assess from resin, temperature, site problems and your machine type — our team can also plan an RX trial

✓ RU / RE grade advice

✓ Request RU / RE trial samples

✓ TDS documents via the team

✓ Plan an RX trial with our team

Chat on LINE

Request advice & Trial samples

Fill a short form — technicians assess the machine-fit grade and call back in business hours

Pick RU or RE for the problem
Assess amount and procedure
TDS documents after assessment
Register RX interest to follow news

TDS documents are served via team assessment, or ask on LINE for fit

FAQ

FAQ: RU and RE

Transition data, temperature ranges, packaging and trials in brief

Why were ASACLEAN™ U and newE discontinued?

To improve product performance and simplify the line — RU builds on U and RE builds on newE

What are the RU and RE temperature ranges?

Maker data: RU 180–330°C (same range as U) and RE 160–300°C. Stay in range and check the TDS before real use

Did pack sizes change?

U → RU stays 20 kg/bag; newE → RE moves from 25 kg/bag to 20 kg/bag

Until when can U and newE be ordered?

U / newE sell through end of March 2026; after that date orders switch to RU and RE respectively

How do I arrange an RX trial?

Contact the CSC technical team to assess the machine and plan a trial, through the same channel as other grades. RX data on this page cites the Asahi Kasei maker

What are the key RX limitations?

RX contains Glass Fiber, runs 180–330°C for injection and extrusion (barrel section only). The manufacturer prohibits sealing and any barrel residence at any temperature.

Can I trial RU/RE before switching?

Yes — RU and RE samples for machine and job-fit assessment, with CSC trial support