Step 1: Use the formula below to determine the amount of stretch.
Step 2:Using an easily visible marker, make a 10 inch line on stretch film unraveled from the roll. Be sure to put the line at least 2-4 ft. away from the end of the stretch film.
Step 3:Tie the film to a pallet and begin wrapping the pallet as normal. After a few revolutions, re-measure the line and write down the new length.
Line Size After Stretch – Line Size Before Stretch ÷ Line Size Before Stretch
Example: If the line size before stretching is 20 inches and after stretching is 32inches the formula would be as below.
32 – 20 = 12 ÷ 10 = 1.2 or 120% stretch.
Step 4 :Use the formula below to determine the amount of ft per roll with the average stretch rate.
1 + Stretch Rate Obtained x Ft. per roll of film.
Once the post-stretched roll length is determined and the film usage is known, purchasers can make accurate forecasts in film ordering and film savings
If you have any questions about How to checkout Stretch Film Stretch Rate
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| stretch film machine |
Dongguan Shunxiang Plastic machinery Co.Ltd.
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Mobile:+86-13712930185 Whatsapp: +86-13712930185
Tel：+86-769-82226632 Fax: +86-769-82226632
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Website: http://www.plasticrecyclingmachine.cc
Email:sam@shunxiangmachine.com fabor@shunxiangmachine.com
Address: No. 1, Xinyuan 5 street, Songbailang Village, Dalang Town, Dongguan City, Guangdong Province
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Main products of Shunxiang Plastic Machinery:
stretch film machine | film blowing machine | plastic recycling machine | blown film machine
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