Product Range Release Base Papers

3 2 1 Release Base Papers Face Stock Adhesive Release Liner Silicone Coating 1 Release Liner Release Base Paper + Silicone Coating

Release Base Papers Main Applications Pressure Sensitive Laminates in reels for industrial application of primary labels Double side Adhesive tapes Carriers and Interleaves Retail Pricing, Tagging Corrective tapes ... Silca Supercalendered base papers for Silicone coating Silco Clay Coated base papers for silicone coating Pressure Sensitive Laminates in sheets Office Products, VIP Labels Laminates in sheets for graphic, promotional, plotter applications Sanitary products Self Adhesive Envelopes

Release Base Papers Making and Properties Silicone hold out is obtained through chemical treatment of the surface and subsequent off-line Supercalendering The pressure and friction of SuperCalender cylinders delivers high density, smoothness and transparency to the paper Silca Supercalendered base papers (glassines) Silco Clay-Coated base papers Silicone hold out is obtained through the application of one or more coating layers Coating is applied still on the Paper Machine (on-line coating) The paper results opaque, bulky and has good lay-flat

1 Release Base Papers Making and Properties Silca Supercalendered base papers (glassines) Refining of cellulose fibers is the first important step of glassine making This process developes many fibrils from the cellulose fibres, increasing the ability to create bonds among them, and increasing the number of those bonds. This will result in a higher resistance (tensile strength) of the paper and in a lower porosity of the paper surface 1

2 Release Base Papers Making and Properties Silca Supercalendered base papers (glassines) 2 Surface Treatment through the application of chemical additives increases the surface hold-out and the anchorage of silicone. the treatment is applied on the paper machine, when the paper web runs throught a Size-Press

3 Release Base Papers Making and Properties Silca Supercalendered base papers (glassines) 3 Supercalendering is the most important process influencing the characteristics of glassine It is an off-line process Paper is first heavily re-moisturised Then it goes through couples of high temperature metal and rubber cilinders Pressure, Temperature and Friction of the cilinders produce smoothness of the surface, high density and high transparency

Applications needing a Supercalendered Base Paper Primary Labels of food, household products and durable goods Adhesive Tapes for household and industrial applications Interleaves, Soundproof and Insulating materials for use in various industrial sectors Specialty Applications

Applications needing a Supercalendered Base Paper Primary Labels of food and beverages, cosmetics and other household products are carried in reels through printing, cutting and dispensing, by a silicone coated release liner. Requirements: high smoothness for silicone hold-out; high density and even thickness for accurate die cut; high transparency for photocell detection Silca Label A range of supercalendered base papers for silicone coating designed to meet those specific needs. ·         57 – 80 gsm ·         Suitable for coating with all silicone systems (solvent, solvent-free, Emulsion, UV)

Applications needing a Supercalendered Base Paper Liners for Primary Labels Glassine - Silicone coat - Adhesive coat - Laminate - Print - Die cut - Remove matrix - Apply

Applications needing a Supercalendered Base Paper Die Cutting Flat Bed rule cutting die Rotary solid cutting die Rotary Sheet cutting die

Applications needing a Supercalendered Base Paper Die Cutting Target: cut the label and the adhesive without cutting or damaging the silicone coated liner. Dies are set upon the expected thickness of the liner die Requirements for the liner: Even thickness , low std deviation High density (ability to be compressed ) Ideal density between 1.10 – 1.15 Die cutting of film labels more demanding, as they need an heavier pressure Label + adhesive Silicone coated liner

Applications needing a Supercalendered Base Paper Label Dispensing Target: automatically remove the label from the silicone coated liner and apply it to the product or container. Requirements for the liner: Resistance, tensile strength: it has to take most of the strain of the applicator procedure The tension of the web changes continuously / stop & go process A problem or a break bring the whole fitting and labelling to a stand still. Possible cause for breaks: silicone voids, impurities Transparency: the labels are detected by a photocell that needs to read through the liner photocell labels receptor silicone coated liner

Applications needing a Supercalendered Base Paper Double side adhesive tapes are used in domestic and industrial applications. They are winded over a double side silicone coated release liner, that prevents the tape from sticking to itself. Requirements: high smoothness and surface treatment enabling silicone hold-out on both sides; high internal bond Silca Industrial Supercalendered base papers treated for silicone coating on both sides. ·         62 – 130 gsm ·         Suitable for coating with all silicone systems (solvent, solvent-free, Emulsion, UV)

Applications needing a Supercalendered Base Paper Double side adhesive tapes Tape coated with adhesive on both sides Main Applications : Packaging tapes Medical tapes Industrial tapes (double side adhesive, foam tapes, protection tapes) Consumer double side adhesive tapes Electronic tapes (semiconductors and carriers) Liner coated with silicone on both sides

Applications needing a Supercalendered Base Paper Double side adhesive tapes Materials used as liners (Europe) : Glassine (60%) Clay Coated paper (20%) PE Coated paper (7%) Films (5%) Others (6%) Requirements for the liner : Mechanical strength (converting) Tear Resistance (converting) No Static loading (converting / end use) Silicone anchorage (end use) Release stability (end use) No dust (end use) Silicones used (Europe) : Solvent free (70%) Emulsion (15%) Solvent (15%)

Applications needing a Supercalendered Base Paper PSA Insulation and Soundproofing materials are widely used in automotive and construction industry. The adhesive face of those materials is protected by a silicone coated release liner. Requirements: high mechanical characteristics; high internal bond to stand the often very high tack of adhesives used. Silca Industrial Supercalendered base papers for silicone coating, ideal for “heavy duty” industrial applications and for use as carriers and interleaves. ·         62 – 130 gsm ·         Suitable for coating with all silicone systems (solvent, solvent-free, Emulsion, UV)

Applications needing a Supercalendered Base Paper Insulating, soundproofing, interleaves 1 Side adhesive: Main Applications : Mastic & Foam for soundproofing and insulation Bitumen for roof covering Alluminium for thermal insulation Fooring and carpets Car emblems and components Electronic interleaves (semiconductors and carriers) 2 Side adhesive:

Applications needing a Supercalendered Base Paper Specialty Applications demand materials winded in very small reels that assure the needed length and a small diameter to fit into the devices they serve: retail portable pricing labellers, supermarket weights; corrective tapes etc. Requirements: low weight and low thickness; high resistance and transparency Silca Light Supercalendered base papers for silicone coating are high performance glassines with increased transparency and low thickness. ·  40 – 50 gsm · Suitable for coating with all silicone systems (solvent, solvent-free, Emulsion, UV)

Applications needing a Supercalendered Base Paper Primary Labels Adhesive Tapes Soundproof, Insulating, Interleaves Specialty Applications Silca Label 57 – 80 gsm Silca Industrial 62 – 130 gsm Silca Light 40 – 50 gsm

1 Release Base Papers Making and Properties Silco Clay coated base papers Double coating: 1 Process Flexibility thanks to PM equipped with multiple coaters, one or more coating layers can be applied on the side to be siliconised, according to the requirements. if needed, coating can be applied also to the back side Coating + pre-coating: Back side coating:

2 Release Base Papers Making and Properties Silco Clay coated base papers Back side is designed according to the converting process (target = layflat): no coating = easier remoisturing ; coating = smaller sensitiveness to changes of humidity in the environment 2 Specific coating 100% designed for silicone application. All chemical used are tested and do not interfere with the silicone curing. Silicone hold out is excellent because of double coating Double coating:

Applications needing a Clay Coated Base Paper Self Adhesive Office Products for desktop printers PSA laminates in Large Sheets Self adhesive envelopes Sanitary Products baby diapers and sanitary napkins

Applications needing a Clay Coated Base Paper Office Products such as self-adhesive labels in A4 sheets for desk-top printing are more and more popular. They rely on a release liner with specific features Requirements: appropriate body for a perfectly flat sheet; back side allowing easy feeding of the sheet into the printer Silco Office A range of clay-coated base papers for silicone coating assuring low silicone consumption, good body and perfect lay-flat. Adapted back side avoids misfeeding while enabling good printing (for brand or instructions) ·  50 – 70 gsm · Suitable for coating with all silicone systems (solvent, solvent-free, Emulsion, UV)

Applications needing a Clay Coated Base Paper Office Products Lay Flat: 1) FLAT LAMINATE - BEFORE CURING 3) FLAT LAMINATE - AFTER CURING AND AFTER REMOISTURISING FACE MATERIAL LINER MOISTURE WAS GIVEN BACK 2) CURLED LAMINATE - AFTER CURING 4) CURLED LAMINATE - AFTER EXCESS REMOISTURISING MOISTURE WAS LOST TOO MUCH MOISTURE WAS GIVEN BACK

Applications needing a Clay Coated Base Paper Office Products COOLING CYLINDER OVEN STEAM BOX Paper Temp: 120°C Moisture Content: 2-3% Paper Temp: 40°C Paper Temp: 40°C Moisture Content: 4-5% Paper Temp: 100°C Moisture Content: 4-5% Lay Flat control: Remoisturing through a steambox After silicone curing After adhesive drying (after lamination)

Applications needing a Clay Coated Base Paper PSA laminates in Large Sheets suit a variety of uses, from screen printed promotional material to plotter cut vinyls for decorative and graphic applications. Top performance is expected from the liner to allow precise register in multi-step printing Requirements: high dimensional stability; extremely high lay-flat, high smoothness of the silicone coated side Silco Classic A range of clay-coated base papers for silicone coating featuring extremely smooth coated side for lowest silicone consumption, highest dimensional stability and lay-flat. Silco Flat clay coated base papers feature an additional coating on the back side for an even improved lay-flat ·         75 – 180 gsm ·         Suitable for coating with all silicone systems (solvent, solvent-free, Emulsion, UV)

Applications needing a Clay Coated Base Paper Large sheets Comparison between PE Coated liners and Clay Coated liners : The main reason of using a PE Coated liner is the dimensional stability of this product. The polycoating on the backside gives a very good dimensionnal stability But back side treatment is now available also on Clay Coated liners in addition to that, PE Coated liners also have several disadvantages: Thermal sensitivity: limit in curing temperature Silicone coverage not measurable: risk of uneven coating Poor silicone anchorage Low density: poor die-cutting, risk of delamination during label peeling Static Loading

Applications needing a Clay Coated Base Paper Self adhesive envelopes offer easy use and various features (re-seal, no steam sensitiveness …). The adhesive strip on the envelope flap is protected by a silicone coated release liner to be pealed before sealing. Requirements: good lay-flat to avoid anti aesthetic wrinkles; printability of the back side for brand or instructions Silco Light Light-weight pigmented release base papers for silicone coating, offering good siliconability, mechanical strength, back side printability. ·         35 – 45 gsm ·         Suitable for coating with all silicone systems (solvent, solvent-free, Emulsion, UV)

Applications needing a Clay Coated Base Paper Sanitary Products like disposable baby diapers and sanitary napkins rely on self adhesive sealing systems. A light-weight release liner to be peeled before use protects the adhesive strips. Requirements: good mechanical properties; good lay-flat; printability of the back side for brand or instructions Silco Light Light-weight pigmented release base papers for silicone coating, offering good siliconability, mechanical strength, back side printability. ·         35 – 45 gsm ·         Suitable for coating with all silicone systems (solvent, solvent-free, Emulsion, UV)

1 Applications needing a Clay Coated Base Paper Envelopes, Sanitary Products How to obtain lay flat and mechanical strength in an extremely light weight paper. reduce the amount of coating so to increase the amount of cellulose fibres without increasing the paper weight fibres = strenght and lay flat 1 Std coating: Same basis weight Light coating (pigmentation):

2 Applications needing a Clay Coated Base Paper Envelopes, Sanitary Products Avoid telescoping of very narrow reels:. telescoping is caused by the excessive smoothness of the back side of the liner, that slips when winded against the silicone coated side a slight back side roughness can avoid the issue Narrow reels of Silicone coated liner: 2 Easy telescoping ...

Applications needing a Clay Coated Base Paper Office Products Large Sheets Self adhesive envelopes Sanitary Products Silco Office 50 – 70 gsm Silco Classic, Silco Flat 75 – 180 gsm Silco Light 35 – 45 gsm