Wojin Plastic Product Factory was established in 2012, we are a professional manufacturer of coffee valve (one way degassing valve) and the hot pressure sealing valve equipment in China. Our own brand is named as WOJIN. We are in the leading position on the introduction of fully automatic production lines, which allow us to reach a high product qualification rate as 99.9997%. Our goal is to serve the customer with better products and services.

Wojin coffee valve is mainly applying to food packaging including coffee bag and fermented feed bag. Additionally, we produce semi-automatic hot pressure sealing valve machine and supply a big variety of packaging bags. The raw material we use HDPE from the USA, while it also meets FDA.


In 2012

The Wojin Plastic Product Factory was established, and we first brought the automatic production line for manufacturing equipment from Japan. Then, we introduced two types of coffee valve as WJ1901 and WJ1902. We also introduced our hot pressure sealing valve machine VM-01 in the second half of the year.


In 2013

New generation – label type of coffee valve WJ01P was introduced and gained positive reviews from local and international customers.


In 2014

We introduced an upgraded version on semi-automatic hot pressure sealing valve machine VM-02. It was a new design with small volume and light weight.


In 2015

We introduced a new automatic hot pressure sealing valve machine VM-04. It allowed our customers on improving production capacity and shortening delivery time. We also took part in the 2015 Canton Fair as exhibitor, which had promoted the cooperation with international food packaging industry.


In 2016

Wojin launched two types of food packaging bags - kraft paper bags and fermented feed bags. At the same time, we added two more fully automatic production equipment and our production volume had been greatly increased.


In 2017

We expanded our factory scale and optimize the internal production layout.


In 2018

We added services to provide customized product for customers, we could also customized various bags including bellow bag and eight-sided sealed bag. Two more fully automatic production equipment were added in this year.


In 2019

The marketing team was expanded, and a new creative office was set up in Daliang town, Shunde District. We spent 4 years on the research and developed a new generation of coffee valve, and introduced new technology on the biodegradable valves (Bio1001, Bio1002).

In 2020, 2021…