Get the RIGHT Additives for mLLDPE Film.
You should look for ingredient levels in mLLDPE and other new high additive concentrates
Properties of LLDPE film resin.
Since the advent of metal
While maintaining its inherent high physical and optical properties, improving processing performance has always been an industry goal.
It was found that the additives played a role here--
A little limited though.
New additive chemicals have not yet been developed to meet the special needs of metallocene film resin.
This also applies to other PE membrane grades with similar properties that come from new non-
Enhanced Ziegler-site catalyst
Nata, and other suppliers of proprietary catalyst technology such as Equistar Chemicals, Nova Chemical, Eastman Chemical.
However, resin manufacturers have been working side by side with additives and parent material suppliers to develop different formulations of traditional PE film additives, including anti-slip agents and anti-blocking agents and processing aids.
The new carrier and carrier said
Business Director of Ciba Specialty Chemicals, \"these additives change the working principle of new energy Mao metal film resin by migrating to the surface of the film may vary in morphology because they are on the molecular structure
This tends to hinder the migration of these additives to the surface.
It is critical to formulate these additives so that they can be better migrated to the surface.
\"Some parent material suppliers focus on the development of additive concentrates in compatible carriers ---e. g.
MLLDPE instead of traditional LDPE and llldpe.
The aim is to minimize or eliminate the loss of strength, including dart and Izod impact and tear resistance, and to maintain the excellent optical properties inherent to this film resin.
The optimized concentrate usually has a higherthan-usual active-
Batching loading to overcome migration problems.
Paul Albee, technical director of Polyvel, Inc. , a color mother producer, said
, \"One of the reasons why the softener or heat is low --
MLLDPE and some other low sealing temperatures-density, high-
The performance film resin is that they tend to have a more tacky surface.
Their coefficient of friction (COF)
High, so they are attached to other films and also to the metal surface of themselves and the production equipment.
The purpose is to use products that reduce film COF and reduce this adhesion.
\"It is not surprising that the fluorine rubber processing aid also plays a great role in the processing of mLLDPE films.
Because their molecules
The weight distribution and higher melt viscosity of MLLDPE film resin are more prone to melt fracture.
Some new formula of fluorine rubber additives can improve efficiency while reducing costs.
Why is mLLDPE used as the number of carrier resin for a few mixed components (e. g. , 30-40%)
In order to enhance the physical properties of low-density polyethylene in a single layer structure, the consensus is that the traditional low-density polyethylene-
Work normally in order to concentrate.
However, trends in the United StatesS.
100% mLLDPE layer is used in multi-layer film structure. Ampacet Corp.
, Pioneer of concentrate development based on metallocene-
Resin carrier, it is strongly recommended to use it for skin or heat using mLLDPE or plaster-seal layer.
Technical director, PhD
Victor Mimeault says the examples are fresh.
Production requires very high gloss, low fog and very high definition packaging and meat packaging. Food-
Packaging Film converter Barrier Film Co. , Ltd. of Sparks, Nev.
, Is an expert in the use of plasters and mLLDPE film resin.
It has been using some new additive concentrates with mLLDPE carriers and high additive loads.
Roland Pleta, an application engineer, said that even a small amount of low-density polyethylene carrier resin would have an impact on the mechanical properties of mLLDPE.
\"We didn\'t see any problems when using these new additive concentrates, and the clarity can be much better.
Rich Hall, technical service manager, food packaging technology, Exxonchemical Co. commented
\",\" We believe that in some cases, the use of mLLDPE carriers in additive concentrates is an advantage, such as our over-brand number, when processing mLLDPE resin.
Normally, if you only add 1-
2% of the masterbatch, it should not have much impact on the carrier.
But that will make a difference as the level of addition gets closer to 5%. \"(
Dow Plastics sources declined to comment on the topic, saying they were unable to discuss any olefin issues in the merger negotiations with United carbide. )
Oscar mcalenhaas, product manager at.
To offset the low density of the material and the viscosity of the film, the level of use of additive concentrates sometimes has to be much higher, Schulman said.
Renia suggested high
Definition anti-block for 100%-in MLLDPE carriermLLDPE, high-
Transparent glue layer.
He said that in cases where clarity is not a problem, and mLLDPE is used for the mixture, the standard anti-blocking concentrate would work.
Tony Tikuisis, a senior additive expert at Nova Chemicals, said his company\'s experiments show that even 1-
Mother material 2% with incompatible carriers can adversely affect physical performance.
\"We have seen up to 20-
Key physical performance such as Dart impact is reduced by 30%.
Nova is working with parent material producers like Ingenia (
Original Weide Technology Co. , Ltd. )
Develop additive concentrates with compatible carriers for Nova\'s new advanced Sclairtech octaene LLDPEs.
Mark Mack, technical director of Equistar Chemicals, added, \"the carrier resin should have a flow property similar to the one you are working on.
The rule of thumb is that it is not possible to mix these two components when your melt viscosity is quite different.
Mack said: \"In general, you want the viscosity difference between the resin and the additive to be no more than two to three factors, so the composition can be well mixed under shear action
Rate conditions for a given process.
\"Phillips Chemical Company Impact mLLDPE resin marketing manager Dan Gray
One consequence of the narrow MWD of metallocene resin was pointed out: \"Because these resins are more difficult to process and easier to melt and break, many people have been studying fluorine rubber processing aids.
Rich Chapman, technical director of fluorine polymers at DuPont Dow elastomer Viton FreeFlow, added, \"we see more and more use of mLLDPE alone than as a mixture, and therefore, dealing with AIDS is considered a way forward.
Instead of choosing low-
Many film converters are now looking for a processing-
Aid concentrate in MLLDPE carrier--
High viscosity though-
Therefore, it does not endanger the intensity and clarity of the film.
\"There are now companies that offer additive concentrates that are tailored to mLLDPE.
Including anti-slip Masterbatch based on erucamide or oil acid amine, anti-blocking products based on synthetic or natural silicon (e. g.
, Anti-fog concentrate based on fat
Based on long chain amine and short-chain amides.
For example, the FDA of Ampacet-
Approved additive concentrate containing metallocene-
Based on the operator currently includes two slip masterbatch.
Level 100329 is level 5%emcamide, slow-
Products in full bloom and 100436 are 5%oleamide fast-
Slip in full bloom.
Ampacet also has five high-load anti-block concentrates.
Three algae-free soil (DE)
: 100342 DE with different granularity is 100371 and 20% and 100940 DE is 25%.
The product 100524 has 50% calcium carbonate and 100902 contains 70% calcium carbonate.
Now there are also two types of anti-slip/anti-blocking products to choose from: 100407 of them have 5% of diammonium and 35% of DE; 100897 has 3.
5% diammonium and 35% DE.
Ampacet also offers 100676 processing-
Auxiliary concentrate using 3% fluorine polymer;
Aid combination with 13% hindered phenol, 6% phosphate and fluorine polymer;
And 101042 uv concentrate for 12% HALS.
Three high-load White concentrates (
50%, 70% and 80%)
Black products are fully rolled out.
In the past two years, polliville company
High-load sliding, settling agent and anti-fog concentrate were introduced in mLLDPE carrier.
Eric Albee, marketing director, says these products are 20-
25% and 3-
Conventional additive concentrate 5%.
\"The film converter can be used 1-
2% of these highly active products, compared to the 5-
10% of conventional concentrate in MLLDPE.
About two of them. and-a-
The cost has increased by half, but the activity level has increased by five times.
\"The metal of Bora-
Resin concentrate includes sliding additive RE25M, a 25%-
Erucamide, FDA class, has excellent dispersion and excellent sliding properties.
Low level of use (0. 25-0.
Effective ingredients 5%)
, Has been shown to significantly reduce the COF of the blown film (
See the picture on the left).
Polyvel has also developed the VF Series anti-fog mixture, which is customized for multi-layer foods
Packaging Film for frozen food and cold meat packaging. They are 20-
40% loaded concentrate, in 2-5% levels (0. 4-0.
Effective ingredients 6%).
According to Paul Albi
It is found that Digan grease is very effective in mLLDPE film.
\"Compared with sorbitan Ester, they migrate better to the surface and improve the thermal stability, and sorbitan ester tends to be more static in the film.
\"The main studies of MLLDPE Polyvel anti-static agents include VSE-
10 for food packaging and-
EO9M of electronic equipment
Both are high load (20%)
The design is only used at 2 points. 5-3. 0%-
It is about half the level of traditional products. A.
Shulman, another pioneer in this field, has developed several batches of additive concentrates for Metallocene film resin since 1995.
Examples of standard products include203T (20% talc), EXT-2017S (
20% natural silica gel), and EXT-20212, (
Glass sphere 10%).
The level of use of these products is usually 1-5%.
According to Schulman\'s Mascarenhas, the company found that synthetic backblocks are more efficient because they allow the selection of optimal granularity for specific applications.
Nova\'s Tikuisis warns that while synthetic silicon provides excellent optical performance, they are often less effective in blocking than DE or talc. \"In-
The indoor test shows that the optical and blocking properties of synthetic silicon are often opposite (i. e.
\"Either good blocking at the expense of poor optics or good blocking at the expense of poor optics,\" he reported . \".
Shulman also offers a combination of anti-slip/anti-blocking products.
42 26tse, combining natural silica and talc with proprietary sliding slip, EXT-
42 20ts, it has the same two anti-blocks as the diammonium slip.
It is said that both concentrates have good blocking resistance, low wear and reasonable cost.
Multi-batch sliding products of metallocene resin include EXT-209 (5% oleamide)and EXT-209E (5% erucamide).
Shulman also provides procedures
Aid concentrates such as EXT206F (
Fluorine polymer 3%)
And custom uv concentrate.
The latter usually contains up to 20% HALS or UV absorbers.
They are used in multi-layer windowsmasking film.
Recently, Shulman has customized anti-fog and Ante Masterbatch in the mLLDPE carrier.
Mascarenhas said that the goal of anti-fog products is high
Clarification applications such as fresh agricultural products bags.
As part of its new extended family of pellet additive masterbatch, the series is sold worldwide under the name of the CESA, astrant masterbatches Div.
A customized formula is provided for mLLDPE and other new film resins.
Manfred Dicks, director of business, said most of the efforts were in the fight against stat preparations.
It was found that the processing aid, advanceCertain fluorine rubber processing aid, was particularly well matched with mLLDPE resin.
In most of the blown films of interest, their purpose is to reduce the melting breakdown and gel formation.
In the performance film, the main purpose is to eliminate mold manufacturing
And reduce the gel.
Sources for Dyneon and DuPont elestors say sales of these products are on the rise due to the increasing use of plasters, mLLDPE and other new high-end products
Properties of LLDPE film resin.
Randy Stone, marketing manager for DuPont Dow rubber company Viton FreeFlow fluorine polymer, said the company has made new development efforts for these film resins.
\"Usually they all have narrow MWD with fewer branches and better physical and optical properties.
Rich Chapman, technical director, added, \"while there must be differences between them, the biggest difference between them and the traditional llannan is that they are often more difficult to process.
Processing aids allow converters to adjust their equipment so that they can run these materials at higher shear rates, lower temperatures and lower pressures.
Two products of the company-
Viton FreeFlow SC and RC--
Low for mLLDPE and similar
Density film resin.
Chapman says these patented formulations are designed to work more efficiently at a minimum cost by allowing processors to use more process aids, but reducing the cost of higher-cost fluorine rubber components.
An acid polymer cleaning the surface of the mold is used in the SC product, while the RC version contains a combination of acid polymer and ethylene glycol.
\"You may use up to 1000 ppm (0. 1%)
But only 250 of processing aids
\"300 ppm is fluorine rubber,\" Chapman explained . \".
According to Susan Woods, director of dynamic marketing, dynamic FX9613 and FX 595a are the two most successful process aids for resin producers and film extruder from Dyneon\'s point of view.
Fx59era is a patented combination of polyethylene and fluorine rubber with lower interaction with other additives such as anti-blocking agents.
These products have recently been shown to be well-made gel suppressed at only 200500 ppm (0. 02-0. 05%)levels.
In one experiment, the PPA fx5920 was shown to significantly reduce the number of gels in very low blowing films
As this is a material that is more difficult to process, it is expected that the results of mllpes or other new LLDPEs will be better.
Last year, Algroup Lonza Launched Glycolube ML-1, a fatty-
Ester lubricant for MLLDPE film blowing.
Experiments show that it can reduce the extruder amps/rpm required for processing 1-1
Add lb/hr per amp.
The inherent high tightness of this mLLDPE is not affected by process assistance.
A development variant of this additive appears to have a synergy with fluorine rubber and has the potential to reduce the use level of fluorine rubber by nearly half to below 400 ppm600-
Joe Williams, technical director at Lonza, said it was 800 ppm before.
Since the new product is sold for about $1/lb while the price of fluorine rubber is about $20/lb, it may save a lot of cost.