Shrink Wrapping - The Process

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The proper protection of an object involves:

• Proper Materials:  The old adage, "you get what you pay for", never held more true than when selecting shrink-wrap materials. It is extremely difficult to distinguish the quality of shrink film by visual observation. The amount of UVI (ultra-violet inhibitors), EVA (ethyl vinyl acetate), anti-block additive, anti-static agents, bi-axial orientation, break strength, and elongation in film cannot be visually observed. A common misconception is that a thicker film (higher mils) is a better film. Mr. ShrinkWrap Protective Services' film is a specially formulated resin blend that provides superior strength and longevity to competitive films of greater millage.

Other materials used in the shrink-wrapping process are:

• Strapping and Buckles: Comes in 1/2" and 3/4" widths. Used in combination with perimeter straps, belly bands, and support straps. 1/2" strapping has 400 lb. tensile strength and is used on smaller objects. 3/4" strapping has lb. tensile strength and is used on larger items.
• Shrink Film Tape:  2", 4", 6" Blue, White, and Clear heat shrink tape is a polyethylene film with a rubber adhesive applied to the underside. The tape is used for padding sharp edges, patching holes, reinforcing seams and fused pleats, and applying such accessories as screen vents and access doors.
• Preservation Tape:  2", 3", 4", 6" Blue, White, and Clear preservation tape is specially formulated shrink film tape used on items where the adhesive residue left when the tape is removed is not desired. This tape is most widely known as "hull tape" since it is used to tape shrink film to fiberglass hulls.
• Screen Vents:  Plastic vents measuring 6" x 4.5" allows a free flow of air to circulate through the shrink-wrapped item preventing moisture and mildew buildup. Vents are applied to the film cover after the shrinking of the film by taping the vent in place or by using the vents with self-adhesive backing.
• Poly Foam Vents:  A second means of providing ventilation within a shrink-wrapped item. These are 24" x 3" x 2" and are only used on objects that have been wrapped with a perimeter strap as they fit between the object and the perimeter strap.
• Poly Foam Padding: Comes in 6" and 48" widths. It is used to pad any sharp objects that might come in contact with the shrink film. It also creates a "lockdown" point because the film will fuse to the foam when heat is applied.
• Vinyl Zipper Doors: Comes in 36" and 48" widths. Allows for the entry into a shrink-wrapped item for inspection, repair, or simply to do work on without having to cut the cover.
• Proper Application Technique: There are three (3) basic methods of shrink-wrapping an object. The method used is determined by its size and shape; whether it is a shipping or storage cover; under what conditions it will be shipped or stored and the length of storage or transportation.
• Perimeter Strapping: This method uses the 1/2" or 3/4" poly woven cord strapping and buckles to create the "framework" for the shrink film to be attached to the item. This method is most widely seen in protecting boats during winter storage where the strapping is secured around the perimeter of the hull. A variation of the perimeter strapping is using existing "framework" such as scaffolding or pipes to secure the shrink film. It is important to remember that the shrink film will not adhere to the object being protected; it will only fuse to itself.
• Total Encapsulation: This method is usually employed on smaller objects but can be done on large objects that can be lifted to permit the shrink film to be placed under them. This method offers the greatest protection since the entire object is sealed in the shrink film.
• Tape Adhesion: This method utilizes either shrink film tape or preservation tape to adhere the shrink film to the object and then apply heat to tighten the film. This method is used when only a portion of the object needs to be protected such as man-holes, car windows, tank openings, etc. Top of Page
• Proper Training and Experience: This aspect of the heat shrink-wrapping process is crucial to a successful and safe shrink-wrapping job. The person(s) doing the shrink wrapping must be properly trained in the use of the heat gun and aware of the dangers involved in using propane fuel. The work area should be examined for safety hazards such as flammable materials. The item being shrink-wrapped should be inspected for flammable objects and proper protection given to those objects. It should be remembered that the average shrink film will have a "shrinking temperature range" of about 250 to 350 degrees F. The shrink film will melt at about 350 degrees F and will burn at 650 degrees F. The average heat gun has an output of about 125,000 BTU/Hr and a heat output/velocity of degrees F./ feet per minute at a range six (6) inches from the nozzle, and 750 degrees F./ feet per minute at a range twelve (12) inches from the nozzle. All heat guns sold by Mr. ShrinkWrap operate with propane gas. Propane has three safety hazards associated with its use: flammable, it's under pressure, and it can freeze.

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Ok Shrinky Dink replacement

Like a lot of comments here, I bought these as an alternative to Shrinky Dinks. (Shrinky Dinks changed their inkjet plastic formula and they kind of suck now.)I kept my expectations low and tried my hand with this new plastic.For people too lazy for a thorough review: Overall an ok craft product. Silhouette cutting is doable. Once baked the plastic is slightly thinner than brand plastic and flexible. Fuzzy texture on both sides. 3.5/5For the OCD crafters who need a thorough review grab a snack and get comfortable, because this will be a long one. lol-----My experience:**Printing:**- As recommended, I lightened my images by 50% and printed on the standard setting with my Canon inkjet printer. No smearing, no paper jam. Print quality will probably vary depending on your printer, but mine was great. So far so good!**Cutting:**- For those of you that are looking to cut these with a Silhouette machine: it's doable, but you'll need to work to get the results you want. Keep in mind that I do not have a deep cut blade, so for those of you that do check out the recommended settings in the asked questions section.- I tried my first sheet with the basic shrink plastic setting (the one Silhouette expects you to use with their brand sheets) and it took forever. I ran it through my machine with double cuts 8 times and it never cut through. I ended up having to snap the pieces out. This wouldn't be a big deal if the back of the sheet wasn't covered with whatever they use to make the plastic printable. It leaves a thin layer around the edge, like the thin membrane you find around hard boiled eggs, so I trimmed off what I could with scissors and ended up completely pulling this layer off on a couple of my other pieces. -- This will become a problem later, but can be avoided.- My second run went a little more smoothly setting my blade to 10 with the shrink plastic setting. Had to run it about 10 times and it still didn't cut all the way through. Snapped my pieces through, trimmed whatever thin skin again and got ready to bake.**Baking:**- I preheated my oven to 350° and baked my first batch for about 3 minutes. They shrunk slowly and got stuck in the "cup" position at around the 3 minute mark. No worries - I added another minute and they flattened out ok! I moved them to my counter and pressed them down with a cook book. First batch good to go.- Second batch shrunk faster since the pan is already hot from the first run. Remember when I said I peeled off the backings on some of my pieces? Those pieces flipped and curled in on themselves on the blank side. Might have been able to uncurl and flatten them out, but the plastic cools off so quickly outside of the oven that I took the loss. Keep in mind: this plastic CAN NOT be reheated once the plastic cools like the Shrinky Dink brand, so act fast if this happens.- For my third batch I ended up laying a second piece of parchment paper on top of the pieces to keep them from curling, like the instructions recommend. Shrinks perfectly fine without any curling and worked on the pieces without backings!**Results:**Size and consistency:My pieces shrunk about 50%. I made a 5inch (12.7cm) test piece that shrunk down to about 2.5inches (6.35cm).Turns out this isn't really as helpful as I was hoping since the 9 pieces I cut out of a single sheet ended up having different levels of warping. Some of my pieces came out fine, while others were slightly stretched or squished.This might not be a deal breaker if you don't care about consistency, but definitely will be if you're buying this to make matching earrings or pins for Etsy.Another thing to note is that this plastic is slightly thinner than Shrinky Dink plastic. It's thin enough to have a good amount of flex. (See photo)This could be a winning or losing point for crafters. Long, narrow pieces have a lot of flexibility and small round/square shapes will have less flex, but still have a bit of bend. Flexibility might be great for accessories that need to hold up under some pressure, like key fobs, but might not be great if you're looking to have some solid hanging charms.If you want a thicker finished product, buy Grafix' regular non-inkjet plastic.Texture:(See photo)Like other comments have mentioned, the pieces will have a textured front and back from the printable material coating the plastic. If you end up peeling some of it away and bake the pieces, it will be really obvious. The texture will also be present around the edge. You can take an emery board and file off any edge fuzz or uneven plastic, but unless you're aggressive with your sanding you won't be able to have a flat clean edge like you would with Shrinky Dink plastic.Sealant:I think this really depends on your printer ink, but I used a matte fixative and it sealed my prints ok. I'm currently waiting on the layer of mod podge to dry, but it seems to be doing ok without any running. I'll update in the event that the mod podge tears away from the surface, but I doubt that it will with how textured the baked product is. lol-----Wow you made it!Personally, if you're buying this to use for craftables with your kids, it's great. If you're looking to use this to sell on Etsy, I'd buy it with caution. Hope this review was helpful ^^

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