Archive for the ‘Acrylic’ Category

We found a great little video on YouTube by user “Make:” which in just three minutes (before credits) gives all sorts of great tips for the DIYer using acrylic in their applications. It starts off with a good point that not everyone knows: acrylic comes in both cast and extruded forms. Yes, they have differences that are important in an application. Yes, there is a difference in cost. Other important tips include how to thermoform, glue, and most importantly – drill, the plastic. Drilling is especially important as the plastic can crack easily, so using lubrication and a soft touch is essential to prevent a wasted part. It will help you answer some questions you didn’t even know to ask prior to diving in: do you have all the materials you need? How are you planning to smooth the edges of the acrylic?

We’ll let the video do the rest of the talking:

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Acrylic sheet (sometimes called “acrylic glass”) is a well known plastic with countless applications for the “DIY” community. Everything from cold frames, to decorations, window replacements or even laser-etched business cards (look them up!). Acrylic offers several advantages other plastics, particularly see-through plastics, do not have. Acrylic’s main competitor in the world of plastics is Polycarbonate. Polycarbonate has higher impact strength than acrylic and should be selected when that is the main concern. Otherwise, acrylic will be slightly (about 15%) less expensive, have superior UV and weathering resistance and be much more scratch resistant: which is a major concern with polycarbonate.

Recently we stumbled across a website called www.instructables.com which has an index for all sorts of really neat acrylic projects to get your creative juices flowing! You can find these projects here: http://www.instructables.com/id/Projects-with-Acrylic/

instructables

Perhaps no industrial plastic is more requested by the “do-it-yourselfer” community than acrylic. Prized for its beauty and well-known because it is used in many applications where the public would encounter the material (displays, aquariums, giftware). In short, acrylic has gained an impressive reputation. But when you work with the material, especially if you’re inexperienced, you really need to do your due diligence in learning the strengths and weaknesses of acrylic and learn how to fabricate it properly.

One of the first tips – especially if you’re just starting out – is to temper your expectations. People imagine they can create polished, flawless projects at home similar to what they have seen in existing products or on the internet. But acrylic is “fussy” to fabricate, it can crack easily if fabrication is done near the edges of the material, it can scratch and the nice, polished finish you see is done by a technique called “flame-polishing” which is a skill that needs to be developed and requires special equipment.

We will provide a couple key tips on this blog but also want to direct you to another blog that seems to be an excellent resource for general acrylic fabrication, which can be found here.

Some tips we can offer:

-ALWAYS leave the masking cover on the acrylic (this provides protection from cracking).

-Avoid fabrication such as drilling near the edges of the acrylic (best to leave a couple inches) as the material can be prone to cracking.

-Acrylic has good UV-resistance, use it outdoors in confidence.

-Cure time for glued acrylic is around 48 hours – be sure you have a way of stabilizing your project while the glue bonds.

Lastly, for some quick tips on gluing acrylic check out this Youtube video:

 

Recently, Redwood Plastics started a pilot project marketing offcuts on local sales directories. This has greatly increased our inquiry traffic from the “diy” community and has been an eye-opener as far as what the general public would like to do with plastic in home applications. The ingenuity of the public is still fascinating and continues to surprise us.

One issue our customers are having is a lack of knowledge about whether they should select polycarbonate or acrylic for a given application. Indeed, the two materials are very different – almost mirror images as far as properties, advantages and drawbacks go. To help we’ve created a simple comparison chart for you. Feel free to copy and save it on your computer for your own reference.

A “takeaway” point from this article we hope you will understand is that acrylic and polycarbonate have certain advantages and disadvantages. There is no “magic bullet” or material that is absolutely superior to the other. You will need to prioritize what is most important for your application and make a selection based on your own criteria. We hope it is helpful!

Acrylic vs. Polycarbonate

 

 

 

 

 

 

 

 

 

 

 

 

 

Acrylic is a fussy plastic, it can be difficult to work with and needs both skilled and patient hands. But the reason for its popularity is the potential of the amazing projects you can complete using the plastic. Case-in-point is this CNC engraved plaque – a 1912 Indian 8-valve board track racer motorcycle:

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This piece’s artist is Dave Langkamp, a retired designer at John Deere. John has significant knowledge of 3D modeling, 3D printing and digital art applications. In this application, the acrylic is 6″ x 10″ x 1/4″ thick. The engraving was done by CNC using Dave’s own file. What makes this piece so unique is the level of fine detail (note the individual links on the drive chain). This is a great example of craftsmanship meeting the right material.

Dave has several other projects on the go at his blog, “The Tinker’s Workshop” including a 3D printed electric car and velomobile. You can check the blog out here.

Polishing Acrylic

Posted: September 17, 2013 in Acrylic
Tags: , , ,

To properly polish acrylic is a little touchy. The most common way is flame polishing which is a subject for a different blog. We did find a video on YouTube that shows a way to polish without flame – utilizing a headlight polishing kit. All that is required is a drill that can fit the scotch pads used in the polishing process. This can be done in the space of minutes and will not involved any flame, which could be considered a hazard.

As with any info we post here, please do your own research first and our posting of this video should not be considered an endorsement of the method used.

E-MAIL: sales@redwoodplastics.com
CDN: 1 800 667 0999
USA: 1 866 733 2684

Polycarbonate (“PC”) is a remarkable plastic for a variety of uses including greenhouses and awnings. With Spring comes cleaning including our glazing plastics like polycarbonate or acrylic. Eventually you will need to clean the material to restore its lustre. At this point unfortunately people are unaware of the sensitivities of polycarbonate and may damage the material. There are two key areas you need to watch out for:

Scratching:

Natural polycarbonate is not scratch-resistant. It might be difficult to understand but the same material that can take extreme impact from hammers and bats (just check YouTube) without breaking cannot resist simple scratches. When cleaning PC you need to be aware of this and prepare accordingly. The big mistake here is using a sponge or other cleaning brush that can trap small particles like sand. Polycarbonate will scratch, so only use a clean (preferably new) cloth.

Solvents:

Polycarbonate is damaged by some common household solvents including Lysol, Pinesol and Isopropanol alcohol. In fact, you should avoid any of the stronger chemical based cleaning solutions to be safe. Certain lab experiments have shown that softer dish soaps like Palmolive or Joy are compatible with polycarbonate as is Windex. However, we cannot independently guarantee that and if you wish to use those solutions it is at your own risk.

So Then…How Do I Clean This Stuff?

Here is a recommended technique*:

1.) Rinse the polycarbonate

2.) Apply a mix of mild soap and warm water. Use a clean, new cloth made of soft material yet as lint-free as possible so it does not trap small particles that might scratch the polycarbonate.

3.) Do NOT wipe in a circular motion. Up and down uniform strokes only. This is especially important with multi-wall polycarbonate.

4.) Change the water and rinse the cloth often. If at any point you see particles then rinse immediately.

5.) Rinse, repeat until clean and make sure you dry with another soft cloth to avoid spots left by the water.

Polycarbonate is a useful material in many “diy” applications. A little care goes a long way!

If you need more information on our polycarbonate please contact us.

E-MAIL: sales@redwoodplastics.com
CDN: 1 800 667 0999
USA: 1 866 733 2684

                               *We recommend cleaning acrylic using the same method.