30results about How to "Effective and durable" patented technology

Methods and apparatuses for masking the edges of a substrate when performing direct or reverse gravure coating using a kiss-coat configuration, particularly useful for in-line coating of biaxially oriented polymeric films. The methods and apparatuses include a masking plate configured to prevent the edge of a portion of a substrate from contacting a gravure roll, the masking plate includes a top portion having a Rockwell B hardness equal to or greater than 80, and a thickness of between 0.03125 inches and 0.375 inches. This masking plate prevents build-up of coating on the edges of the substrate which otherwise can cause film orientation production instabilities such as film breaks, sticking to tenter clips, and / or edge trim recycling incompatibilities. The masking plate provides a masking method that is effective and durable, minimizing production downtime and maintenance.

The invention discloses a method for preparing water-retaining agent by utilizing straws of farm crops. The method includes the steps as follows: after steam explosion on the straws of farm crops, adding water in straws and conducting stirring and filter pressing, wherein filter residue is straw powder material after steam explosion; adding water in the straw powder material after steam explosionfor sizing and pasting; after cooling temperature to reaction temperature, slowly adding sodium acrylate solution with 65-75% of neutralization degree, and mixing the mixture to uniform; adding initiator and cross-linking agent in sequence; and after graft copolymerization and crosslinking, obtaining graft cellulose, thus obtaining low-cost degradable water-retaining agent. On the basis that the activable hydroxy of straw cellulose after steam explosion is increased, the technology condition is optimized and the usage amount of acrylic acid is lowered; the preparation method is simple, the production cost of the water-retaining agent is greatly reduced, and industralized production can be realized; in addition, the prepared water-retaining agent is good in water-retaining effect, low in cost and degradable, thus being an environment-friendly material and having excellent application prospect.

The invention relates to the fields of ecological environment protection and chemical production, and relates to a water-retaining agent used in saline lands, and a preparation method thereof. The water-retaining agent is composed of substances of, by weight: modified corn bran, industrial-grade acrylic acid, industrial-grade acrylamide, a neutralizing agent, a water-soluble catalyst, industrial-grade purified water, a cross-linking agent, a stabilizing agent, ultrafine modified bentonite powder with a specification of 1200-1800 meshes, and sorbitol tristearin. The invention also discloses a preparation method of the water-retaining agent. The water-retaining agent provided by the invention is advantaged in high reaction efficiency, low cost, and good application effect in saline land ecological vegetation restoration.

A golf green repair tool having a plurality of spears centered around a plurality of tines. The tines and spears are biased by a spring inside a housing and sleeve. When the cap the housing is pressed by the foot of a greenskeeper or golfer the spring is compressed forcing the tines and spears into the turf. The tines are inserted around the periphery of the ball-mark to aerate and loosen the turf. The spears are inserted into the center of the ball-mark and aerate and pull the bottom of the ball-mark to the level of the surrounding turf. The bottom side of the ground-contacting sleeve pressed down the raised rim of the ball-mark correcting the entire ball-mark to the level of the surrounding turf.