History of cement package(http://www.tianhaiplastic.com/) from wooden casks to final Polypropylene woven bag.Because of PP cement bag's advantages; PP cement bag is the future trend in cement packaging.
Imported cement was packaged in wooden casks11, each containing 3 bushels12, about 4 to 4.25 cubic feet (about 170 kg net) depending upon the fineness of the cement. Cement produced in Australia was initially supplied in similar sized wooden casks (C&CA 1928). Later cement was supplied in jute bags of 125lb.(56.7 kg) (Penn 1977), as well as wooden casks and light gauge steel drums of 400 lbs gross (375 lb. net) for export (Commonwealth 1904). In 1906, steel drums,semi-circular in cross section and equal to half a normal drum,.were designed to supply remote area by camel transportation. The jute bags proved to be to dusty leading to a docker strike. Paper lined jute bags were developed which led to the present multi-walled paper bag. When cement in paper bags was introduced, it sold at 127 pounds gross and 125 pounds net per bag.
Polypropylene was first polymerized to a crystalline isotactic polymer by Giulio Natta as well as by the German chemist Karl Rehn in March 1954.[4] This pioneering discovery led to large-scale commercial production of isotactic polypropylene by the Italian firm Montecatini from 1957 onwards.[5] Syndiotactic polypropylene was also first synthesized by Natta and his coworkers.
In china, paper cement bag have the whole market before 80's. In 80's, PP woven bag is used in cement packaging, and be in a rapid development This bag has a defect. That is easy to be dusty. We improved the design. Final laminated polypropylene woven bag came. It is accepted by whole market. And Chinese government set a policy to forbid the pp woven bag without lamination in 90's.
Laminated pp woven bag is Durable and hard to break, Light Weight so can save the freight for transfer, Moisture / Water Resistant, not easy to take dust and Reusable. PP cement bag is low cost and high price-quality ratio. The raw material is get from oil and it is environmental-friendly. So laminated pp woven bag is the first selection for cement packaging. It dominates the Chinese market.
Tianhai Plastic Co. is experienced in woven PP cement bags for 10 years, establishing good cooperation relationship with big companies. Our product is of high quality and pretty competitive price.
Advantages of our product:
Flexible and of high strength,
Resistant to chemicals (alkali and acid resistant),
Corrosion resistant
Resistant to fungal growth
Moisture resistant - virtually unaffected by water and atmospheric moisture, doesn't absorb water
Lightweight
100% recyclable
Laminated Polypropylene Cement bag
| Raw Material | 100% new pp or as the customers' requirement |
| Color | White,Yellow as the customers' requirement |
| Printing | Offset printing |
| Width | As the customer's requirement |
| Length | As the customer's requirement |
| Weights/m2 | As the customer's requirement |
| Top | Heat cut or hemmed |
| Bottom | Single/double folded, single/double stitch |
| Lamination | Yes |
| Packing | 400 per bundle, can be customized |
| Minium Order | 300,000 |
| Lead Time | 15 days after place an order |
| Payment Term | L/C, T/T |
