37results about How to "Reduce reverse osmosis" patented technology

The invention belongs to the papermaking technical field, more specifically relates to a process for producing the high-molecular water-absorbent resin dust-free paper. The process for producing the high-molecular water-absorbent resin dust-free paper takes fluff pulp wood pulp fiber, hot melt composite fiber and high-molecular water-absorbent resin (SAP) as the raw materials and the dust-free paper is composed of three-layer mixing layers. The process for producing high-molecular water-absorbent resin dust-free paper comprises the following steps: mixing the raw materials through a molding case, penetrating through hot air, wherein a heat bonding point between the hot melt fiber and wood pulp fiber formed by surface melting and flowing which are generated by the hot melt fiber during the heating process has the heat bonding effect, spraying latex on the double faces of the paper web and then drying by hot-air in a drying cylinder, rewinding to obtain the finished product. The present invention has the beneficial effects that the dust-free paper has good penetration performance and imbibition capability, is capable of effectively holding liquid, minimizing the reverse osmosis of liquid and maintaining the dry surface of the product, and has less dust and high tensile strength.

The invention relates to a bacteriostatic odor-removing absorption article and a manufacturing method thereof. The bacteriostatic odor-removing absorption article sequentially comprises a non-woven fabric surface layer, an absorption layer and a bottom film layer from top to bottom; the absorption layer comprises an upper absorption layer and a lower absorption layer, the upper absorption layer is composed of at least one super absorbent resin absorbent paper layer, and the lower absorption layer is a bacteriostatic odor-removing absorption layer; and the bacteriostatic odor-removing absorbing layer contains a bacteriostatic odor-removing absorbing material, the bacteriostatic odor-removing absorbing material is formed by mixing a bacteriostatic odor-removing material and super absorbent resin, and the bacteriostatic odor-removing material is composed of cortex phellodendri chinense, wormwood, golden larch bark, fructus cnidii, honeysuckle and herba leonuri. The bacteriostatic odor-removing absorption article has good bacteriostatic, odor-removing and menstruation-regulating effects, and has the characteristics of instant absorption (rapid absorption of liquid such as menstrual blood or urine), instant drying, effective locking of liquid such as menstrual blood or urine, low reverse osmosis, good dryness, comfort, close fitting and the like.

The invention discloses a high-degradation rate diversion layer material and a preparing method thereof, and relates to the field of disposable hygiene products. The high-degradation rate diversion layer material is prepared through selection of polylactic acid fiber with different hydrophilicity and water repellency properties, different thicknesses and different melting points, and selection of reasonable technological parameters during reinforcing of a hot air oven. The prepared high-degradation rate diversion layer material is composed of an upper fibre web and a lower fibre web, wherein the upper fibre web is a disordered fibre web formed through air laying, the lower fibre web is a carded and directly laid web, and the upper fibre web and the lower fibre web are made into a high-degradation rate diversion layer with high using strength through hot air reinforcing. The technical problem that a diversion layer material is hard to degrade and poor in diversion performance, instant absorptivity and temporary liquid storage capacity, causing side leakage liability and serious reverse osmosis of disposable hygiene products is solved. The diversion layer material has excellent diversion performance, high liquid storage capacity, high instant absorptivity, and a high biodegradation rate.

The invention relates to the technical field of sponge city construction, in particular to a sponge city water circulation system, and aims to overcome the defects that in the process of collecting and recycling city rainfall in the prior art, when the rainfall is large, a drainage system difficultly drains water normally, and city waterlogging is likely to be caused. Wherein the road surface layer is arranged on an urban surface road, the permeable pipeline is used for collecting rainwater permeated into the road surface layer, the rainwater overflow well is used for slowing down the rainwater discharge rate, and the drainage pipeline is used for collecting rainwater and conveying and discharging the rainwater; two symmetrically-arranged water passing holes are formed in the inner side wall of the rainwater overflow well; by means of the sponge city drainage system, the drainage capacity of the sponge city is enhanced, the possibility of urban inland inundation is reduced, and then the stability of the sponge city is improved.

The invention relates to the field of sanitation supplies and provides a preparation method of a composite core. The defect of a complex preparation technology of a composite core in the prior art isovercome. The method comprises the steps of preparation of a surface layer pure wood pulp layer, preparation of a middle mixing layer and preparation of a bottom layer pure wood pulp layer. The surface layer pure wood pulp layer, the middle mixing layer and the bottom layer pure wood pulp layer are formed on a core preparation machine at a time. The core preparation machine comprises a cotton suction mold wheel, a wood pulp feeding port is formed above the cotton suction mold wheel, and a formation bin is arranged between the wood pulp feeding port and the cotton suction mold wheel; a bin division plate (4) and a bin division plate (5) are arranged in the formation bin at intervals, a fixing rack for fixing the bin division plate (4) and the bin division plate (5) is arranged at the top ofthe formation bin, the formation bin is divided into a first formation bin area, a second formation bin area and a third formation bin area by the bin division plate (4) and the bin division plate (5), and a macromolecule water-absorbent resin discharging pipe is arranged above the second formation bin area.

The invention relates to a crucible with an impurity-discharge function, which is applied in a polysilicon purification or ingot casting link. The crucible comprises a columnar crucible body. Overflow holes are arranged on a side wall of the crucible body. A collection tank is arranged on the outer side of the crucible body and below the overflow holes. The height H from the bottom edges of the overflow holes to the inner bottom side of the crucible body equals H liquid+(H solid-H liquid)20%, wherein H liquid is the liquid level of liquid-state polysilicon in the crucible body, and H solid is the height of crystallized polysilicon in the crucible body. The method has the following steps: a polysilicon material is added into the crucible body; the crucible body is mounted in a furnace, and vacuum pre-pumping is carried out; first-stage heating is carried out, and polysilicon is completely molten; crystal growth is carried out; annealing is carried out, such that internal stress in the crystals is eliminated; cooling is carried out, wherein the polysilicon ingot is cooled to a temperature of 400 DEG C with the furnace; the ingot is fetched from the furnace and is cooled to room temperature; the silicon ingot is fetched; and overflown silicon material is collected. During an operation process, a top-layer impurity-rich zone is removed under a liquid state, such that impurity-rich zone reverse osmosis after the silicon ingot is formed is reduced, and silicon ingot overall utilization rate is improved.

The invention relates to the field of disposable hygienic products, in particular to a 3D (three-dimensional) absorbent core body. The 3D absorbent core body comprises a base body, an upper cladding layer and a lower cladding layer, wherein the lower cladding layer extends upwards from two sides to form folding parts, and the folding parts cover the upper cladding layer; the base body comprises amain absorbent core layer, a fluffy non-woven fabric layer or diversion non-woven fabric layer, a lower high-absorption resin layer, and a bottom wood pulp fiber layer which are sequentially stacked from top to bottom; the main absorbent core layer at least comprises an upper wood pulp fiber layer, a wood pulp fiber and high-absorption resin mixing layer and a lower wood pulp fiber layer which aresequentially arranged from top to bottom, a left row of diversion trenches and a right row of diversion trenches are arranged in the base body, and each row of diversion trenches consists of a plurality of short diversion trenches; and the folding parts and the upper cladding layer sink at the positions of the short diversion trenches, and the folding parts and the lower cladding layer have partswhich are bonded with each other. The technical problem that the transverse diffusion effect and ventilation are difficult to improve when an existing multi-layer composite absorbent core body performs absorption for two times or more is solved.

The invention relates to a separated sanitary absorbing article. The separated sanitary absorbing article comprises an absorbing body and an isolating layer, wherein the absorbing body is separably arranged above the isolating layer; the isolating layer is made of a PE film; the absorption body sequentially comprises a surface layer, a flow guide layer, an absorption core body layer and a bottom layer from top to bottom. and the bottom layer is made of a water-repellent spun-bonded non-woven fabric. The absorption body and the isolating layer are two independent structures and are connected through glue, so that the absorption body is convenient to take down and replace. The absorption body is located above the isolating layer, all the materials are breathable non-woven fabrics or paper and the like, the function of absorbing secretions of the human body is achieved, good breathability is guaranteed, and the lower isolating layer has the functions of isolating liquid from infiltrating and preventing clothes from being polluted. The separated sanitary absorbing article is novel in conception and simple in structure, good air permeability and replaceability of the sanitary absorption article are achieved through the design of the separated sanitary absorbing article, and the sanitary absorbing article is sanitary and convenient to use.

The invention relates to a skirt type absorption article which comprises an absorption body and an outer layer, the outer layer is of a skirt type structure formed by compounding an inner lining layer and an outer wrapping layer, and the two longitudinal ends of the absorption body are connected with a front waist area and a rear waist area of the outer layer together; the absorption body sequentially comprises a skin attaching layer, an absorption layer and a breathable bottom layer, and side leakage prevention layers higher than the skin attaching layer are arranged on the two sides of the skin attaching layer; and elastic stretching materials are arranged at the crotch position of the absorption body and the front waist area and the rear waist area of the outer layer. The skirt type absorption article has the advantages of being comfortable, attractive, close-fitting and the like, has an excellent using effect in the aspects of attractiveness and comfort, and is a light, thin, comfortable and anti-side-leakage absorption article suitable for being directly worn outside by a user.

The invention discloses a hot melt adhesive for a siphon plate and a preparation method of the hot melt adhesive. The hot melt adhesive is prepared from the following raw materials: first EVA (Ethylene Vinyl Acetate) resin, second EVA resin, tackifying resin, Fischer-Tropsch wax and an antioxidant, wherein the content of VA in the first EVA resin is 25-30 wt%, and the content of VA in the second EVA resin is 15-20 wt%; the tackifying resin comprises a first tackifying resin with a softening point of 98-110 DEG C and a second tackifying resin with a softening point of 130-150 DEG C. The hot melt adhesive can improve the cohesiveness of the siphon plate, and has good chemical stability, aging resistance and ozone resistance. The preparation method of the hot melt adhesive comprises the following steps: mixing the Fischer-Tropsch wax and the oxidizing agent, adding the second tackifying resin and the first EVA resin, adding the first tackifying resin and the second EVA resin, heating and stirring to completely melt the raw materials, filtering, and granulating to obtain the hot melt adhesive for the siphon plate, so that environment-friendly, non-toxic, safe and efficient production is realized.

The invention relates to a method for preparing double-layer structure foam with low residual monomer content through rapid curing, a foam material and application thereof. The prepared double-layer structure foam can be used for disposable hygiene products; upper-layer foam holes are large and play a role in rapidly absorbing and guiding fluid to other absorption areas; and lower-layer foam holes are small in size and large in specific surface area and has very high wicking capacity and fluid storage capacity. The prepared hygiene product has very good liquid treatment performance, low reverse osmosis, low odor and good softness, is better in fitness to the body compared with a traditional sanitary product, and is comfortable to use.

The invention provides a day use sanitary napkin with a straight strip bag, which comprises a sanitary napkin body, the sanitary napkin body comprises a bottom film and a surface layer, the side portion of a non-woven fabric is connected with the surface layer in a sealed mode through the non-woven fabric, a water absorption layer, macromolecule paper, a flow guide layer and a blue chip are sequentially arranged between the bottom film and the surface layer from bottom to top, the flow guide layer is provided with a first flow guide groove and a second flow guide groove, and the sanitary napkin body is provided with a first crease, a second crease, a third crease and a fourth crease. The sanitary napkin can effectively prevent side leakage and the like, and is comfortable to use. In conclusion, the sanitary napkin is reasonable in structure, easy to use and convenient to popularize and apply.

The invention provides a straight-strip-packaged sanitary napkin for night. The sanitary napkin comprises a sanitary napkin body; the sanitary napkin body comprises a bottom film and a surface layer; the side portion of a non-woven fabric is connected with the surface layer in a sealed mode through the non-woven fabric; a water absorption layer, macromolecule paper, a flow guide layer and a blue chip are sequentially arranged between the bottom film and the surface layer from bottom to top; the flow guide layer is provided with a first flow guide groove, a second flow guide groove, a third flow guide groove and a fourth flow guide groove; and the sanitary napkin body is provided with a first crease, a second crease, a third crease and a fourth crease. The sanitary napkin can effectively prevent side leakage and the like, and is relatively comfortable to use. In conclusion, the sanitary napkin is reasonable in structure, easy to use and convenient to popularize and apply.