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Anti UV

There are two major types of UV stabilizers:
– UV stabilizers
– UV stabilizers with barrier effect

The former have the purpose to protect polymers from the degradation caused by the sun’s UV radiations.

The latter have the purpose to absorb UV radiations and transform them into thermal energy, thereby protecting the contents of the articles to be manufactured.
The percentages of use of these products vary according to the requested stability to light — expressed in kly — and of their geographical area of ​​exposure.

Possible processing problems
The use of UV additives in the extrusion process can give rise to the ‘die buildup’ phenomenon, the formation of encrustations on the head of the extruder due to a deterioration of the polymer, which leads to problems for the finished product and downtime in order to clean the head.
Rifra products have been formulated to avoid this problem, thereby improving production efficiency.
During the raffia extrusion process, however, the phenomenon of WCO (Water Carry Over) might appear; that is, dragging of water that limits hourly productivity.
We formulated products that eliminate this phenomenon, thereby improving production.

Possible problems for manufactured articles
Heat shrink PE products may incur in problems such as caps weldability; we solved this problem by creating a specific product.
Loss of UV performance due to interaction with environment pollutants (chlorine, pesticides, sulfur); in this case too we are able to formulate specific products that can withstand such conditions.
Rifra manufactures products specifically designed to ensure the Anti UV functionality requested by the customer even in the presence of flame-retardants (FR), which usually inhibit the functions of UV additives.

CODE

COMMERCIAL DESCRIPTION

COMPATIBILITY

CODE
COMMERCIAL DESCRIPTION

RIFRACHEM ULVIN HE/1005

STRETCH FILM from 20 to 70µm, SUITABLE FOR THE WELDABILITY OF CAPS. UV STABILIZATION FROM 6 MONTHS FOR 30 MICRON CAST FILM, FROM 12 MONTHS FOR 100µm BUBBLE FILM
COMPATIBILITY
LDPE.LLDPE
CODE
COMMERCIAL DESCRIPTION

RIFRACHEM ULVIN HE/1013

UV STABILIZER SUITABLE FOR VARIOUS APPLICATIONS AND SECTORS
COMPATIBILITY
LDPE,HPDE,PP OMO,PP COPO
CODE
COMMERCIAL DESCRIPTION

RIFRACHEM ULVIN PP/1

SYNERGIC COMBINATION FOR THE PROTECTION OF PP PRODUCTS. STABILIZATION ACTS BOTH ON GLOSS AND MECHANICAL PROPERTIES
COMPATIBILITY
PP OMO, PP COPO
CODE
COMMERCIAL DESCRIPTION

RIFRACHEM ULVIN PP/2 MOD

EXCELLENT IN THE PREVENTION OF WCO (Water Carry Over), SPECIFICALLY FOR FILMS AND PP FIBRES WHEN LOW MIGRATION IS REQUIRED
COMPATIBILITY
PP OMO, PP COPO
CODE
COMMERCIAL DESCRIPTION

RIFRACHEM ULVIN HE/111

UV ADDITIVE WITH A HIGH CONCENTRATION OF MONOMERIC HALS
COMPATIBILITY
PP OMO, PP COPO
CODE
COMMERCIAL DESCRIPTION

RIFRACHEM ANTI-UV HE/140 2%

THE PRODUCT USED WITH 2% OF LDPE HAS UV STABILIZATION OF 540 KLY
COMPATIBILITY
LDPE
CODE
COMMERCIAL DESCRIPTION

RIFRACHEM ULVIN PE B001

UV ADDITIVE DESIGNED FOR THE PROTECTION OF POLYOLEFINS, ALSO SUITABLE FOR LOW THICKNESS STRANDS AND FOR HDPE MOULDED ARTICLES
COMPATIBILITY
LDPE. HDPE
CODE
COMMERCIAL DESCRIPTION

RIFRACHEM ANTI-UV HE/277

SUITABLE FOR CORRUGATED PIPES IN VIRGIN AND REGENERATED HDPE
COMPATIBILITY
HDPE
CODE
COMMERCIAL DESCRIPTION

RIFRACHEM ULVIN 1640 D

SUITABLE FOR CONTENT PROTECTION, IN LDPE AND HDPE FILM AND BLOWING
COMPATIBILITY
LDPE, HDPE
CODE
COMMERCIAL DESCRIPTION

RIFRACHEM ULVIN HE/944

UV ADDITIVE WITH A HIGH CONCENTRATION OF POLYMER HALS
COMPATIBILITY
PP OMO, PP COPO