stretch film tackifie

stretch film tackifier 
1) stretch film tackifier of the role and type.stretch film must have two basic performance, one is to have good mechanical strength, better ductility and good elasticity; stretch film surface (single or double) to have a strong stickiness. Polyethylene can be produced with good mechanical strength, better extension and good elasticity of stretch film, but difficult with enough surface viscosity of the plastic stretch film, and therefore the production of polyethylene stretch film, they often need the help of tackifier The agent class of additives, in order to improve the stickiness of the surface of the stretch film.
Industrial production of, LLDPE stretch film manufacturer can use the tackifiers are low molecular weight polyisobutylene (PIB), the density below 0.905 ultra low density

polyethylene (VLDPE) and EVA resin. EVA resin to produce sour because of possible higher prices, cost-effective and low factor, is now rarely used; ultra low density

polyethylene has good flexibility, high viscosity, high strength and puncture resistance characteristics, can be used in the manufacture of pallets stretch film , but there are

lower cost, the actual use of the less; low molecular weight polyisobutylene, pallet stretch film tackifier, viscosity adjustment range, easy to adjust viscosity, and the

price is relatively low, price- the comprehensive advantages are obvious. Therefore, the low molecular weight polyisobutylene and its parent material is the tackifier pallets

stretch film production, the most commonly used.
The polyisobutylene been able to become excellent tackifier reasons in addition to its intrinsic viscosity, but also because it is incompatible with the pallets stretch film

properties, due to incompatibility, polyisobutylene will gradually migrate to the stretch film the surface, resulting in stickiness.

2) polyisobutylene optimal
self-adhesive stretch film and the amount of polyisobutylene into a positive correlation, however, When polyisobutylene join more than 3%, with increasing amount of

polyisobutylene, the improvement of self-adhesive stretch film has become obvious to continue to improve The amount of polyisobutylene, polyisobutylene will result in

precipitation on the surface of the membrane assembled into a block, resulting in the stretch of self-adhesive film uneven, and even stretch film volume is difficult to open. In

order to ensure the ultimate performance of the stretch film, and considering the raw material cost of polyisobutylene, the dosage should be controlled between 1% -3%.
PIB has an exudative process, generally about three days after the pallet stretch film surface in order to generate enough viscous; In addition, the migration speed of the PIB and the

storage temperature: their summer migration to precipitate faster, while the slow winter migration. Polyisobutylene in the production of stretch film ratio should change with

the seasons have to be adjusted: in winter than summer to join a little more to be added.
Different production processes due to the difference of the device, the use of polyisobutylene are different. Due to the blow molding process to produce stretch film thickness

uniformity is not as good as cast film, and therefore the polyisobutylene blow molding process of the use should be slightly higher than the casting process, the difference of

the specific usage needs to refer to the specific processes of different users conditions.
3) Dalin, Nippon polyisobutylene and domestic polyisobutylene performance
For stretch film production of the domestic polyisobutylene the Kyrgyzstan JHY-1300 and Jinzhou JINEX6130, compared with them, Daelim and day stone polyisobutylene performance,

has the following advantages:
(1) Viscosity: Daelim, Nippon polyisobutylene of viscosity is higher than the products of the same molecular weight of the guitar and Jinzhou, the dosage can be relatively less;
(2) the degree of hydrogenation: the hydrogenation of Dalin, Nippon polyisobutylene extent than JHY1300 and JINEX6130 will not affect the color of the stretch film is oxidized

and the use of performance during use.
4) the PIB tackifier masterbatch
Low molecular weight polyisobutylene is a viscous liquid material, a mixture of the PIB and polyethylene pellets, Universal extruder production of LLDPE stretch film, the

material will not be able to smooth extrusion, the need to adopt special extrusion equipment, such as hopper with the forced feeding of the extruder, forced feeding a mixture of

LLDPE and PIB, or special extruder for use can be pumped into the viscous liquid, pumped into the PIB. To facilitate the production, have been developed for the production of

high concentrations of polyethylene stretch film PIB tackifier masterbatch masterbatch is made by mixing of PIB and polyethylene, and plastic products often use various similar

to the shape of the parent material, with good fluidity, easy to use, the use of ordinary stretch film forming unit, the smooth production of polyethylene stretch films wrapped

around.
5) tackifying masterbatch and polyisobutylene
By polyisobutylene tackifier masterbatch, as a tackifier in performance and the polyisobutylene no difference tackifying masterbatch of the biggest advantages is easy to use.
Tackifying masterbatch market, domestic and imported categories, tackifying masterbatch production process there is a certain cost, so the price is higher than polyisobutylene,

resulting in as polyethylene stretch film tackifier formula costs to be significantly higher than the polyisobutylene directly as a the tackifier formula cost. Resulting in its

market share is far less than polyisobutylene.
a slightly different stretch film and cling film
cling film is often used for a class of plastic packaging of fresh food products, cling film currently on the market, the first is a polyethylene, this material is mainly used

for food packaging, such as fruits, vegetables, including the The second is called the supermarket procuring semi-finished products are of such material; PVC, this material can

also be used in food packaging; third polyvinylidene chloride, mainly used for cooked food packaging . Carcinogenic effects of plasticizers in PVC type cling film, PVDC

production costs are too high, most of the cling film tend to use PE as a raw material.
The cling film is a kind of stretch film, but it does not require, as so self-adhesive stretch film can, therefore, the use of polyisobutylene less, polyisobutylene is mainly

used to increase product flexibility and self-adhesive.

6) stretch film of polyisobutylene performance requirements
The PE stretch films use "sticky", in fact, both have good peel-off adhesive but also have a good lap sticky. Stripping viscosity the higher the bulk packages, trays more

difficult, and stretch film, sealing the better; lap viscosity the higher the stretch film is more difficult to occur the vertical displacement, in order to obtain a solid

packaging, tray like commodities large-scale integration packaging, PE stretch film Peel and lap viscous equilibrium.
Different molecular weight (MW) of low molecular weight polyisobutylene adhesion effect of lldpe stretch filsm, play a decisive role. Different molecular weight, the adhesion

performance also will be different. High molecular weight polyisobutylene with a higher final peel adhesion of the stretch film, but with the increase in the molecular weight of

polyisobutylene lap adhesion attenuation; relatively low molecular weight polyisobutylene has a good lap adhesion, The molecular weight is too low will lead to a sticky period

was too short, because of its more volatile. Therefore, select the appropriate molecular weight polyisobutylene, in order to make the stretch film with the best performance.

Convenience, considering the above factors as well as the process of using the results showed that the number average molecular weight of about 1300 polyisobutylene apply to

increase the self-adhesive stretch film can be.
In order to obtain a peel-off adhesive and lap viscosity to achieve the desired balance, some stretch film manufacturer also choose to polyisobutylene of different molecular weight

combinations, for the increase of the viscosity of LLDPE stretch film. Such as France the Baoli have provided the polyethylene stretch film tackifier polyisobutylene, is the

molecular weight of low molecular weight polyisobutylene mixture.

jining hongxiang packing material co.,ltd