in the preparation process of polyurethane foam, the main role of the catalyst is to adjust the speed of the foaming reaction and gelation reaction to…
1. principle of polyurethane curing because it contains a urethane group (nhcoo-) in the main chain, it is commonly known as polyurethane adhesive. it…
1. water distribution ratio water: amine: silicone oil = 100: 7: 35 the amine is a-33 or a38, which can be imported or domestically produced. the sili…
flame-retardant soft foam (flame-retardant sponge) is commonly used in export foam and high-end furniture foam. in the past fourteen years, the physic…
(1) talk about equipment slow rebound sponge foaming equipment is basically the same as ordinary sponge foaming equipment. two foaming methods are cur…
one of the factors affecting the slow rebound effect: nco index the impact of nco index on slow rebound: low: soft, slow recovery speed, air blowing c…
the production method of using d4 or dmc to make amino silicone oil is as follows: 1. hydrolysis of coupling agent first put 100kg of piperazine-based…
1.foreword as we all know, polyurethane slow rebound foam is also called memory foam and viscoelastic foam. its unique feature is that it can conform …
introduction hydrogen peroxide is the most commonly used oxidative bleaching agent in the current pre-treatment bleaching process. whether it is two a…
sponge-like porous materials based on electrospinning technology have the advantages of high porosity, light weight and versatility. with the continuo…
textile printing and dyeing auxiliary companies are miserable: on the one hand, printing and dyeing companies do not agree with the price increase of …
colorless – slightly yellowish transparent liquid, does not contain heavy metals such as mercury, lead, polycyclic aromatic hydrocarbons, phthal…