87results about How to "Does not affect appearance quality" patented technology

The invention discloses a formula of a modified polypropylene composite material with low shrinking percentage. The formula comprises the components in parts by weight as follows: 50-70 parts of polypropylene, 10-15 parts of polyethylene, 10-20 parts of POE (Polyolefin Elastomer), 20-30 parts of opal, 1-3 parts of silane coupling agent, 2-5 parts of talcum powder and 1-3 parts of assistant. According to the invention, opal is added into the formula to modify the surface of the opal through the silane coupling agent and the talcum powder, so that inorganic filler in the composite material not only has the weight increasing effect, but also enables the modified polypropylene composite material to have lower shrinking percentage and low price and cost. Other performances of the composite material are not affected, and the appearance quality is not affected, so that the material is very suitable for application.

The invention discloses an automobile seat backrest with a middle armrest. The left end and the right end of an armrest cup holder are hinged to a cup holder rotating shaft. The left end of the cup holder rotating shaft is fixedly supported by an armrest cup holder limiting support. The armrest cup holder limiting support limits the armrest cup holder and is fixed to a large armrest cup holder bracket in a welded mode. The large armrest cup holder bracket is longitudinally welded into a backrest framework. The right side of the cup holder rotating shaft is also provided with an armrest cup holder limiting support and a large armrest cup holder bracket, and the armrest cup holder limiting support and the large armrest cup holder bracket on the right side of the cup holder rotating shaft are in symmetry with the armrest cup holder limiting support and the large armrest cup holder bracket on the left side. A shape supporting steel wire is arranged in back foam in an integrally foam forming mode. The position, close to an armrest cavity, of the steel wire is bent into a U shape along the upper edge, the lower edge and one side edge of the armrest cavity, and the steel wire is embedded into the back foam. The situation that the automobile seat backrest tilts as a result of imbalance between left stress and right stress will not happen, and the problem that soft foam at the edge of the armrest cup holder collapses after being coated with a shell fabric is solved.

The invention provides a preparation method of insoluble sulfur and a used anti-reversion stabilizer thereby. According to the method disclosed by the invention, methane is selected as an anti-reversion stabilizer, and the methane is added into liquid sulfur at a sulfur vaporization stage according to a certain mass ratio and decomposed into living free radicals in the presence of living free radicals of sulfur vapor. In the process of quenching the sulfur vapor mixed with the methane, insoluble sulfur end groups produced by polymerization of the sulfur vapor are terminated by the living freeradicals produced by decomposition of the methane, and the insoluble sulfur stabilization process is completed. The methane is added at the liquid sulfur vaporization stage, and the methane is mixed with the sulfur vapor in a gaseous form after sulfur vaporization, rather than being added into the product at the later stage in a solid or liquid manner, so that uniform contact mixing of the insoluble sulfur and the stabilizer can be realized to the greatest degree, the stabilizing process and mixing difficulty of the stabilizer are reduced, and the production efficiency is increased; and moreover, the stabilizer is added at an earlier stage of production, so that reversion of the insoluble sulfur is avoided, and the product quality is improved.