The appearance of peoples teeth have changed greatly over the centuries. Originally people understood little of the importance of toothpaste in contrast to today. As a result humans, centuries ago, did not have a full set of teeth. The teeth that still hung loosely from their gums were often darkened and rotten.

However as technology and new priorities have arisen such as dental health, society has also changed and in this case most would say for the better.

Developments in toothpastes can whiten the colour of our teeth as well as improve the smell of our breath. This means that people will not be judged upon so much by their appearances as long as the teeth are brushed regularly. This, on the other hand means that it doesn't only depend on the advances in the technology but also in the commitment of the user to the brushing of his/her teeth.

The toothbrush as we know it today was not invented until 1938. However, early forms of the toothbrush have been in existence since 3000 BC. Ancient civilizations used a "chew stick," which was a thin twig with a frayed end. These 'chew sticks' were rubbed against the teeth.

The bristle toothbrush, similar to the type used today, was not invented until 1498 in China. The bristles were actually the stiff, coarse hairs taken from the back of a hog's neck and attached to handles made of bone or bamboo.

Boar bristles were used until 1938, when nylon bristles were introduced by Dupont de Nemours. The first nylon toothbrush was called Doctor West's Miracle Toothbrush. Later, Americans were influenced by the disciplined hygiene habits of soldiers from World War II. They became increasingly concerned with the practice of good oral hygiene and quickly adopted the nylon toothbrush. I got this from http://www.loc.gov/rr/scitech/mysteries/tooth.html
1770
1938
Tooth brushing has been around for thousands of years. The Babylonians were using "chewingsticks" as early as 3500 BC. The first true bristled toothbrush began in China around 1600 AD. Modern toothbrushes began in England around in 1780 with carved handles and natural bristles placed in bored holes and kept in place by a thin wire. By the early 1800's bristled toothbrushes were in use and in 1857 H.N. Wadsworth got the first patent for an American toothbrush. Nylon was first used for bristles by 1938 and in 1939 electric toothbrushes are sold, but the wide use of brushing teeth wasn't until after WW2 when the army enforced the habit with the men in their ranks.
i was told the toothbrush was invented in the year 1498 after a scarcity of leaves used for mouth cleansing,at that time.

The toothpaste cap & shampoo flip top cap mould making is a question about the difficulty of how to make their top flip cap automatic closed and the closing must be 100%. Besides this difficulty, we are need to make the toothpaste cap mould or shampoo cap mould unscrewing out the screw thread by the moulding. After the unscrewing, then use stripper plate or tubular ejectors to push the cap out from the mould. In the same time, we need to keep the moulds high speed injection.

In 2010 year, Sino Packaging Mould Co has successfully made a toothpaste cap mold with 32 cavities the mould function:

• unscrewing ejection
• injection molding with hot runner system
• the top flip was closed completely on the mould
• the top flip matching with the cap main body well
• all the cavities, cores and the same components in the mould are interchangeable
• with the cycle time 12 seconds

To make the toothpaste cap mould or shampoo top flip cap mould, we need very precise machining and correct machining process. The moulds need correct mechanical design. Hot runner system need the injection force and distances exactly even.

Annually, Sino Package Mould are producing more than 300 sets of various flip top cap moulds for shampoo, toothpaste or other cosmetic containers. The mould life can be 10M shots guaranteed and the quality service and be 5 years free of charges.

Below is the related mould photos and the mould testing videos for toothpaste cap mold and shampoo flip top cap mould.