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CN111592710B - Nose bridge strip material of all-plastic mask and preparation method thereof - Google Patents

Nose bridge strip material of all-plastic mask and preparation method thereof Download PDF

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Publication number
CN111592710B
CN111592710B CN202010625775.3A CN202010625775A CN111592710B CN 111592710 B CN111592710 B CN 111592710B CN 202010625775 A CN202010625775 A CN 202010625775A CN 111592710 B CN111592710 B CN 111592710B
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parts
zone
antioxidant
nose bridge
styrene
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CN111592710A (en
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郭雨明
谭用明
焦联朝
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Dongguan Priwork New Material Technology Co ltd
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Dongguan Priwork New Material Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D27/00—Details of garments or of their making
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/006—Additives being defined by their surface area
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/062—HDPE
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/066—LDPE (radical process)

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention relates to the technical field of protective masks, in particular to a nose bridge strip material of an all-plastic mask and a preparation method thereof, wherein the nose bridge strip material of the all-plastic mask comprises the following components: the invention has the advantages of long shaping time, good folding resistance, low safety risk, comfortable wearing and recyclability.

Description

Nose bridge strip material of all-plastic mask and preparation method thereof
Technical Field
The invention relates to the technical field of protective masks, in particular to a nose bridge strip material of an all-plastic mask and a preparation method thereof.
Background
The nose bridge strip is also called a nose clip, a nose bridge rib, a nose bridge line and a nose bridge bone, is a transverse strip made of a plastic material in the mask, can fix the mask on the nose bridge and can be tightly attached to the face together with the ear belt to improve the sealing performance of the mask. Generally, the mask has two fixed positions, one is arranged on the outer layer of the mask, namely an outer embedded type, and the other is arranged on the interlayer of the mask, namely an embedded type. The length of the nose bridge strip is not less than 8.0cm according to the regulations of disposable medical masks (YY/T0969-2013). According to the requirements on safety performance in the technical Specification for masks for children (GB/T38880-2020), the mask should not have a sharp tip and a sharp edge which can be touched, and the nose clip should endure 20 folds without breaking.
Due to the nature of the human face structure, the bridge of the nose is substantially higher than the cheeks, like a mountain bridge on plain. As a result, the nose of the face of the person is raised, and corners exist between the nose and the cheeks, so that a cavity gap is always formed in the area when the mask is worn, and air leakage is caused. The nose bridge strip is mainly used for sealing the mask except for fixing the mask, and particularly for ensuring that air leakage does not occur at the nose-face junction (namely the corner). Therefore, the main index for measuring the quality of the nose bridge strip is whether the mask can be tightly attached to the face.
The nose bridge strip is mainly divided into three types according to the materials: metal, plastic wrap, and all plastic. Metals: mainly soft metals, more expensive, such as aluminum, are usually external. Plastic coating: galvanized iron wires are used as frameworks, and are coated by plastics (PE, PP, PVC and the like), and the galvanized iron wires are the most common at present and have built-in type and external type. All plastics: the petrochemical resin is used as a base material, is subjected to modification and then is subjected to one-step molding through an extrusion die, and has no metal framework and has built-in and external components.
Because the aluminum sheet is softer and well shaped, the material of the common metal nose bridge strip is basically aluminum. But because the price of the aluminum nose bridge is higher, the aluminum nose bridge is mainly used for the masks with higher protection grades such as N95 and dust prevention. The plastic-coated nose bridge strip has simple production process, and because galvanized iron wires are used as traction, the production speed is very high, the production cost is relatively low, the selling price is low, and the plastic-coated nose bridge strip is widely adopted by common mask manufacturers. But also has the characteristics of high calcium carbonate filling, large specific gravity and the like. In the aspect of using, plastics cladding nose bridge strip mainly relies on the iron wire to finalize the design, if used plastics are soft on the side, the plastic layer is thin on the side, so in the use, if the ear area is short on the side tight on the side, just be equivalent to the iron wire directly with the bridge of the nose contact, bridge of the nose department can have and tighten the trace, the serious meeting is tightened the pain or is ground the painful bridge of the nose, lead to gauze mask comfort level experience effect extremely poor. Because metal type nose bridge strip is whole to be exposed outside, the metal of plastics cladding type nose bridge strip both ends cutting plane is exposed, and comparatively sharp, can cause the safety risk of fish tail or stabbing. Meanwhile, the metal and plastic-coated nose bridge strips contain metal, so that separation is difficult during recycling and treatment, and most of the cases mainly burn.
The full-plastic nose bridge strip is not provided with a metal framework and is also called a boneless nose bridge strip. The polyolefin resin is used as a base material, and is added with an auxiliary agent, filling and the like, and is subjected to high-temperature plasticizing modification by a double-screw extruder to form the high polymer material. Which is formed once by an extrusion die, has the characteristics of small specific gravity, no halogen, no o-benzene, green environmental protection and the like, meets the environmental protection control requirements of RoHS, REACH and the like. The raw materials are mainly made of high polymer materials, are relatively soft, do not have the safety risk of scratching or stabbing, and meet the safety performance requirement of the mask. Particularly, the inner and outer layers of non-woven fabrics and the melt-blown fabric of the middle layer of the disposable plane mask are made of polypropylene materials, the ear bands (ear ropes) are made of terylene or chinlon and spandex, and are made of high polymer materials as the raw materials of the full-plastic nose bridge strip, so that the disposable plane mask can be completely plasticized, recycled and reused. Along with the reinforcing of environmental protection consciousness, the environmental control will be more severe, and the plastic bridge of the nose strip of easy recovery will be the development trend of future gauze mask bridge of the nose strip.
Compared with metal and plastic-coated nose bridge strips, the all-plastic nose bridge strip has the advantages of simple production process, comfort in wearing, easiness in recycling and the like, and is bound to become a new trend for the development of the mask industry in the future. However, the existing all-plastic nose bridge strip generally has the problems of difficult shaping, short shaping time and poor sealing and folding resistance, so that the use proportion of the all-plastic nose bridge strip on the mask is very small, and the price of the metal nose bridge strip is higher, so that the plastic-coated nose bridge strip is still used as the main part in the production of the existing masks, particularly the disposable plane masks.
Chinese patent application CN101831111a discloses a plastic mask nose bridge batten, which comprises the following material components by weight: 75-85% of polypropylene, 14-22% of polyvinyl chloride PVC and 1-3% of setting agent. The plastic mask nose bridge batten is formed by drawing and winding through a screw extruder. The invention has the advantages that the original metal nose bridge batten is replaced, and the bridge pressing plate is particularly suitable for occasions which are easy to generate strong static electricity, such as dry battery plants, coal mining yards and the like, can not generate electricity to hurt people and generate sparks, and improves the safety coefficient; the nose bridge pressure strip is used for adjusting the sealing performance of two sides of the nose bridge after the mask is worn, and is characterized in that the nose bridge pressure strip can be adjusted in a memory mode, can be bent at will in the middle of the nose bridge pressure strip, and cannot be broken after being bent for hundreds of times continuously. However, the setting time of the product is short, and the sealing performance, folding endurance and wearing comfort are further improved.
In order to meet the requirements of the mask industry and adapt to the development trend of the mask industry, the all-plastic mask nose bridge strip material used for the mask, particularly the disposable plane mask, has the advantages of simple production process, long shaping time, good folding resistance, wearing comfort and easy recovery, and the preparation method thereof are urgently needed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a nose bridge strip material of a full-plastic mask, which has long shaping time, good folding resistance and comfortable wearing, and meanwhile, the nose bridge strip can be recycled after being produced into the mask, thereby having the characteristics of environmental protection. The preparation method can be used for single one-time extrusion processing and molding, and has the characteristic of simple processing method.
The invention is realized by the following technical scheme:
the nose bridge strip material for the all-plastic mask comprises the following components: polyethylene, polypropylene, styrene elastomer, reinforcing agent, plasticizer, setting agent, lubricant, filler, compatilizer, antioxidant and titanium dioxide.
Preferably, the nose bridge strip material of the all-plastic mask comprises the following components in parts by weight: 30-58 parts of polyethylene, 5-20 parts of polypropylene, 3-10 parts of styrene elastomer, 5-20 parts of reinforcing agent, 0.1-10 parts of plasticizer, 3-20 parts of setting agent, 5-15 parts of filler, 2-8 parts of 1# compatilizer, 0.5-3.5 parts of 2# compatilizer, 0.1-1 part of lubricant, 0.1-1 part of antioxidant and 1-3 parts of titanium dioxide.
More preferably, the nose bridge strip material of the all-plastic mask comprises the following components in parts by weight: 30-53 parts of polyethylene, 6-18 parts of polypropylene, 3-8 parts of styrene elastomer, 5-18 parts of reinforcing agent, 0.1-8 parts of plasticizer, 6-18 parts of setting agent, 6-10 parts of filler, 2-6 parts of 1# compatilizer, 0.5-1.5 parts of 2# compatilizer, 0.1-1 part of lubricant, 0.1-1 part of antioxidant and 1-3 parts of titanium dioxide.
Preferably, the plasticizer is one or more of aromatic oil, naphthenic oil and white mineral oil.
More preferably, the plasticizer is naphthenic oil.
Preferably, the polyethylene is one or more of high density polyethylene, medium density polyethylene and low density polyethylene.
More preferably, the polyethylene is a blend of high density polyethylene and linear low density polyethylene.
Preferably, the polypropylene is high-flexural modulus polypropylene, and the flexural modulus is more than or equal to 800MPa.
Preferably, the styrenic elastomer is a mixture of a linear styrene elastomer resin having a styrene content of 30 to 45% and a linear hydrogenated styrene elastomer resin having a styrene content of 25 to 40%.
More preferably, the mass ratio of the linear styrene elastomer resin (SBS) having a styrene content of 30 to 45% to the linear hydrogenated styrene elastomer resin (SEBS) having a styrene content of 25 to 40% is 1.5 to 3.5. Further preferably 1:2.
More preferably, the styrenic elastomer is a mixture of a linear styrene elastomer resin (SBS) having a styrene content of 30% and a linear hydrogenated styrene elastomer resin (SEBS) having a styrene content of 30% in a weight ratio of 1:2.
Preferably, the reinforcing agent is one or more of Polystyrene (PS), polyethylene terephthalate (PET), and nylon 6 (PA 6).
More preferably, the reinforcing agent is a mixture of Polystyrene (PS) and polyethylene terephthalate (PET).
Preferably, the fixing agent is one or more of 58# paraffin, fischer-tropsch wax 80 and fischer-tropsch wax 105.
More preferably, the styling agent is fischer-tropsch wax 105.
Preferably, the # 1 compatibilizer is a maleic anhydride polyethylene graft copolymer.
Preferably, the # 2 compatibilizer is one or both of a maleic anhydride styrene graft copolymer and a maleic anhydride hydrogenated styrene graft copolymer.
More preferably, the 2# compatibilizer is a mixture of a maleic anhydride styrene graft copolymer and a maleic anhydride hydrogenated styrene graft copolymer.
More preferably, the mass ratio of the maleic anhydride styrene graft copolymer to the maleic anhydride hydrogenated styrene graft copolymer is 1.5 to 3.
Preferably, the filler is one or more of white carbon black, barium sulfate, light activated calcium carbonate and ultrafine calcium carbonate.
More preferably, the filler is a mixture of white carbon and light activated calcium carbonate.
Preferably, the lubricant is one or two of silicone powder and silicone master batch.
More preferably, the lubricant is a silicone masterbatch.
Preferably, the antioxidant comprises a primary antioxidant and a secondary antioxidant.
More preferably, the weight ratio of primary to secondary antioxidants is 1:2.
More preferably, the primary antioxidant is one or more of antioxidant 1010, antioxidant 1076, antioxidant 168 and antioxidant 626.
More preferably, the primary antioxidant is antioxidant 1010 with the chemical name of tetra [ beta- (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester.
More preferably, the secondary antioxidant is one or more of antioxidant 1076, antioxidant 168 and antioxidant 626.
More preferably, the auxiliary antioxidant is antioxidant 168, and the chemical name is tris [ 2.4-di-tert-butylphenyl ] phosphite.
The titanium dioxide is a pigment to improve the whiteness of the product.
The invention also relates to a preparation method of the nose bridge strip material of the all-plastic mask, which comprises the following steps:
(1) Mixing and stirring: firstly, mixing and stirring a styrene elastomer and a plasticizer, and then uniformly mixing and stirring the styrene elastomer and the plasticizer with polypropylene, polyethylene, a reinforcing agent, a setting agent, a compatilizer, a lubricant, an antioxidant, a filler and titanium dioxide to obtain a mixture A;
(2) Melting and mixing: and (2) adding the mixture A obtained in the step (1) into a double-screw extruder for melting and mixing, and sequentially carrying out extrusion, bracing, air cooling, granulating and drying processes or underwater granulating processes to obtain the nose bridge strip material of the all-plastic mask.
Preferably, step (1) comprises the steps of: the styrene elastomer and the plasticizer are mixed and stirred for 20-30 minutes at the temperature of 60-65 ℃, and then are mixed and stirred for 5-10 minutes with the polypropylene, the polyethylene, the reinforcing agent, the setting agent, the compatilizer, the lubricant, the antioxidant, the filler and the titanium dioxide at the temperature of 75-85 ℃ to obtain a mixture A.
Preferably, the length-diameter ratio of the twin-screw extruder in the step (2) is 40-60.
More preferably, the twin screw extruder has a length to diameter ratio of 56 and a speed of 350rpm.
Preferably, the temperatures of the screw sections of the twin-screw extruder in the step (2) are respectively as follows: 170-180 ℃ in the first zone, 180-190 ℃ in the second zone, 190-200 ℃ in the third zone, 200-220 ℃ in the fourth zone, 220-260 ℃ in the fifth zone, 220-260 ℃ in the sixth zone, 220-260 ℃ in the seventh zone, 220-260 ℃ in the eighth zone, 220-260 ℃ in the ninth zone, 220-260 ℃ in the tenth zone, 220-260 ℃ in the eleventh zone, 220-260 ℃ in the twelfth zone, and 210-240 ℃ in the head.
The beneficial effects of the invention are:
(1) In the invention, polyethylene and polypropylene are used as base resins, so that the all-plastic nose bridge strip material is mainly ensured to have basic physical property requirements, and particularly, the all-plastic nose bridge strip material can have higher folding resistance requirements by optimizing the polyethylene to be a mixture of high-density polyethylene and linear low-density polyethylene. Meanwhile, the rigidity of the material is improved by optimizing the flexural modulus of polypropylene, so that the all-plastic nose bridge strip material has a good shaping effect. The reinforcing agent has the main functions of reducing the flexibility of the material and improving the rigidity of the material, thereby improving the shaping effect of the material. However, when the rigidity is too strong, the folding endurance of the material is significantly reduced. The styrene elastomer not only improves the tensile strength of the material and ensures high-speed processing production, but also improves the flexibility of the material, thereby improving the folding resistance of the material, and particularly further improving the folding resistance of the material by optimizing the composition and the proportion of the styrene elastomer.
The polyethylene, the polypropylene, the styrene elastomer and the reinforcing agent are used in a matched manner, so that the composite material has a synergistic effect, the rigidity and the flexibility of the material can be ensured, the shaping and the folding resistance of the material can be improved, the nose bridge strip can be prevented from being broken easily in the production process, the high-speed processing is ensured, and the production efficiency is improved.
(2) In the invention, the main function of the setting agent is to lubricate and utilize the good setting effect of the setting agent in the solid state so as to improve the setting performance of the material, and meanwhile, the setting agent is combined with other components so as to avoid the situation that the setting agent is fragile and easy to break in the solid state.
(3) The invention adopts two compatilizers, and improves the compatibility among the components of the material by optimizing the composition and the component proportion of the compatilizers, thereby ensuring that the folding resistance and the shaping effect of the material are better exerted.
(4) The material adopted in the invention is mainly a high molecular material, is relatively soft, has no safety risk of scratching or stabbing, and meets the safety performance requirement of the mask.
(5) The resin materials such as polyethylene, polypropylene, styrene elastomer and the like adopted by the invention are thermoplastic resins, can be recycled, and belong to green and environment-friendly products.
(6) The nose bridge strip material of the all-plastic mask can be extruded and formed at one time independently, can be directly produced by using common electric wires or PP/PET packing belt production equipment without adding any other auxiliary materials, has the characteristic of simple processing method, and can meet the performance requirements of long shaping time, good sealing performance and comfortable wearing of the nose bridge strip of the mask.
Detailed Description
The invention is further described below in conjunction with specific embodiments, and the advantages and features of the invention will become more apparent as the description proceeds. These examples are illustrative only and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.
Example 1 nose bridge strip material for all-plastic mask
The nose bridge strip material of the all-plastic mask provided by the embodiment is composed of the following raw materials in parts by weight: 30 parts of polyethylene, 18 parts of polypropylene, 8 parts of styrene elastomer, 5 parts of reinforcing agent, 18 parts of setting agent, 8 parts of plasticizer, 10 parts of filler, 2 parts of 1# compatilizer, 3.5 parts of 2# compatilizer, 0.5 part of lubricant, 0.5 part of antioxidant and 1.5 parts of titanium dioxide.
The raw material sources are as follows:
polyethylene: is a mixture of high density polyethylene and low density polyethylene in a weight ratio of 3:1. High density polyethylene, available from majesty petrochemical company, with a product designation HHM5502LW; low density polyethylene, available from Moore petrochemicals, sold under the trade designation PE-LM2720A.
Polypropylene: purchased from Moore petrochemicals, having a product designation PPB-M09 and a flexural modulus of 1180MPa.
Styrene-based elastomer: is a mixture of a linear styrene elastomer resin (SBS, styrene content 30% by weight) and a linear hydrogenated styrene elastomer resin (SEBS, styrene content 30% by weight) in a weight ratio of 1:2; linear styrene elastomer resin (SBS, styrene content 30% by weight) was purchased from Barlingpetrochemical company under the product designation YH-788; linear hydrogenated styrene elastomer resin (SEBS, 30% styrene by weight) was obtained from Baling petrochemicals under the product designation YH-502T.
Reinforcing agent: is a mixture of Polystyrene (PS) and polyethylene terephthalate (PET), and the mass ratio is 1:3; polystyrene (PS) was purchased from Zhenjiangqi beautifiers, inc., under product designation PG-33; polyethylene terephthalate (PET) was purchased from Huarun packaging materials, inc., product designation CR-8828.
Shaping agent: 58# Paraffin, purchased from Daqing refining division of China Petroleum, with product number 58#.
Plasticizer: is naphthenic oil, purchased from Clarity company in Xinjiang, and has a product code of 4010.
Filling: is a mixture of white carbon black and light activated calcium carbonate with the weight ratio of 1:2; the specific surface area of the white carbon black is 200 +/-30 m 2 (ii)/g, available from wacker chemical company, product designation HDKN20; the light activated calcium carbonate is purchased from Jiangxi Bairui calcium carbonate Co, ltd, and the product model is 1250 meshes.
1# compatibilizer: maleic anhydride polyethylene graft copolymer available from dupont chemical company under product designation E226;
2# compatibilizer: 1.5 of maleic anhydride styrene graft copolymer and maleic anhydride hydrogenated styrene graft copolymer in a weight ratio of 1; maleic anhydride styrene graft copolymer, available from Dongguan Hongkai plastics corporation, with a product code of HK1000; the maleic anhydride hydrogenated styrene graft copolymer is purchased from Dongguan Hongkai plastic company, and the product commodity number is M500SE.
Lubricant: is a silicone master batch which is purchased from the chemical material limited of star beida (Beijing) and has the product code of ST-LS301.
Antioxidant: comprises a main antioxidant and an auxiliary antioxidant, wherein the main antioxidant is 1010, the chemical name is tetra [ beta- (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, the product is purchased from Pasf company, and the product number is Irganox1010; the auxiliary antioxidant is 168, the chemical name is tris [2, 4-di-tert-butylphenyl ] phosphite, which is available from basf corporation and the product number is Irgafos168; the weight ratio of the primary antioxidant to the secondary antioxidant is 1:2.
Titanium dioxide: purchased from dupont under the product designation R706;
the preparation method of the nose bridge strip material of the all-plastic mask comprises the following steps:
(1) Mixing and stirring: firstly, mixing and stirring a styrene elastomer and a plasticizer at the temperature of 60 ℃ for 25 minutes, and then uniformly mixing and stirring the styrene elastomer and the plasticizer with polypropylene, polyethylene, a reinforcing agent, a setting agent, a compatilizer, a lubricant, an antioxidant, a filler and titanium dioxide at the temperature of 80 ℃ for 8 minutes to obtain a mixture A;
(2) Melting and mixing: adding the mixture A obtained in the step (1) into a double-screw extruder with the length-diameter ratio of 56 and the rotating speed of 350rpm for melting and mixing, and sequentially performing the working procedures of extrusion, bracing, air cooling, grain cutting and drying or underwater granulation, wherein the temperature of each section of the screw is as follows: 170 ℃ in the first zone, 180 ℃ in the second zone, 195 ℃ in the third zone, 210 ℃ in the fourth zone, 245 ℃ in the fifth zone, 245 ℃ in the sixth zone, 245 ℃ in the seventh zone, 245 ℃ in the eighth zone, 245 ℃ in the ninth zone, 245 ℃ in the tenth zone, 245 ℃ in the eleventh zone, 245 ℃ in the twelfth zone and 220 ℃ at the nose head, and finally the full plastic nose bridge strip material is obtained.
Example 2 nose bridge strip material for all-plastic mask
The nose bridge strip material of the all-plastic mask provided by the embodiment is composed of the following raw materials in parts by weight: 35 parts of polyethylene, 15 parts of polypropylene, 6 parts of styrene elastomer, 6 parts of reinforcing agent, 16 parts of setting agent, 6 parts of plasticizer, 10 parts of filler, 3 parts of 1# compatilizer, 1.5 parts of 2# compatilizer, 0.5 part of lubricant, 0.5 part of antioxidant and 1.5 parts of titanium dioxide.
The raw material sources are as follows:
polyethylene: is a mixture of high density polyethylene and low density in a weight ratio of 3:1. High density polyethylene, purchased from the famous petrochemical company, with a product designation HHM5502LW; low density polyethylene, available from Mount petrochemical company, as product number PE-LM2720A.
Polypropylene: purchased from Mount Britain petrochemical company, having a product designation PPB-M09 and a flexural modulus of 1180MPa.
Styrene-based elastomer: is a mixture of linear styrene elastomer resin (SBS, styrene content 30%) and linear hydrogenated styrene elastomer resin (SEBS, styrene content 33%) in a weight ratio of 1; linear styrene elastomer resin (SBS, styrene content 30% by weight) was purchased from Barlingpetrochemical company under the product designation YH-788; linear hydrogenated styrene elastomer resin (SEBS, 33% styrene by weight) was purchased from Barlin petrochemical company under the product designation YH-503T.
Reinforcing agent: is a mixture of Polystyrene (PS) and polyethylene terephthalate (PET), and the mass ratio is 1:3; polystyrene (PS) was purchased from Zhenjiangqi beautifiers, inc., under product designation PG-33; polyethylene terephthalate (PET) was purchased from Huarun packaging materials, inc. under product designation CR-8828.
A setting agent: is Fischer-Tropsch wax 80, available from Shell, under the product designation SX-80.
Plasticizer: is naphthenic oil, purchased from Clarity company in Xinjiang, and has a product code of 4010.
Filling: is a mixture of white carbon black and light activated calcium carbonate with the weight ratio of 1:2; the specific surface area of the white carbon black is 200 +/-30 m 2 (ii)/g, available from wacker chemical company, product designation HDKN20; the light activated calcium carbonate is purchased from Jiangxi Bairui calcium carbonate Co., ltd, and the product model is 1250 meshes.
1# compatibilizer: maleic anhydride polyethylene graft copolymer available from dupont chemical company under product designation E226;
2# compatibilizer: is a maleic anhydride styrene graft copolymer and a maleic anhydride hydrogenated styrene graft copolymer in a weight ratio of 1:3; the maleic anhydride styrene graft copolymer is purchased from Dongguan Hongkai plastic company, and the product code is HK1000; the maleic anhydride hydrogenated styrene graft copolymer is purchased from Dongguan Hongkai plastic company, and the product commodity number is M500SE.
Lubricant: is a silicone master batch which is purchased from the chemical material limited of star beida (Beijing) and has the product code of ST-LS301.
Antioxidant: comprises a primary antioxidant and a secondary antioxidant, wherein the primary antioxidant is 1010, the chemical name is tetra [ beta- (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, the product is purchased from Pasteur company, and the product number is Irganox1010; the auxiliary antioxidant is 168, the chemical name is tris [2, 4-di-tert-butylphenyl ] phosphite, which is available from basf corporation and the product number is Irgafos168; the weight ratio of the primary antioxidant to the secondary antioxidant is 1:2.
Titanium dioxide: purchased from dupont under the product designation R706;
the preparation method of the nose bridge strip material of the all-plastic mask comprises the following steps of:
(1) Mixing and stirring: firstly, mixing and stirring a styrene elastomer and a plasticizer at the temperature of 65 ℃ for 25 minutes, and then uniformly mixing and stirring the styrene elastomer and the plasticizer with polypropylene, polyethylene, a reinforcing agent, a setting agent, a compatilizer, a lubricant, an antioxidant, a filler and titanium dioxide at the temperature of 80 ℃ for 8 minutes to obtain a mixture A;
(2) Melting and mixing: adding the mixture A obtained in the step (1) into a double-screw extruder with the length-diameter ratio of 56 and the rotating speed of 350rpm for melting and mixing, and sequentially performing the working procedures of extrusion, bracing, air cooling, grain cutting and drying or underwater granulation, wherein the temperature of each section of the screw is as follows: 170 ℃ in the first zone, 180 ℃ in the second zone, 195 ℃ in the third zone, 210 ℃ in the fourth zone, 245 ℃ in the fifth zone, 245 ℃ in the sixth zone, 245 ℃ in the seventh zone, 245 ℃ in the eighth zone, 245 ℃ in the ninth zone, 245 ℃ in the tenth zone, 245 ℃ in the eleventh zone, 245 ℃ in the twelfth zone and 220 ℃ at the nose head, and finally the full plastic nose bridge strip material is obtained.
EXAMPLE 3 nose bridge strip Material for all-plastic mask
The nose bridge strip material of the all-plastic mask provided by the embodiment is composed of the following raw materials in parts by weight: 40 parts of polyethylene, 13 parts of polypropylene, 5 parts of styrene elastomer, 8 parts of reinforcing agent, 15 parts of setting agent, 5 parts of plasticizer, 10 parts of filler, 3 parts of 1# compatilizer, 1.5 parts of 2# compatilizer, 0.5 part of lubricant, 0.5 part of antioxidant and 1.5 parts of titanium dioxide.
The raw material sources are as follows:
polyethylene: is a mixture of high density polyethylene and low density in a weight ratio of 3:1. High density polyethylene, available from majesty petrochemical company, with a product designation HHM5502LW; low density polyethylene, available from Mount petrochemical company, as product number PE-LM2720A.
Polypropylene: purchased from Mount Britain petrochemical company, having a product designation PPB-M09 and a flexural modulus of 1180MPa.
Styrene-based elastomer: is a mixture of a linear styrene elastomer resin (SBS, styrene content 30% by weight) and a linear hydrogenated styrene elastomer resin (SEBS, styrene content 30% by weight) in a weight ratio of 1:2; linear styrene elastomer resin (SBS, styrene weight content 30%) was purchased from Barlin petrochemical company under the product designation YH-788; linear hydrogenated styrene elastomer resin (SEBS, 30% styrene by weight) was purchased from Barlingpetrochemical company under the product designation YH-502T.
Reinforcing agent: is a mixture of Polystyrene (PS) and polyethylene terephthalate (PET), and the mass ratio is 1:3; polystyrene (PS) was purchased from Zhenjiangqi beautifiers, inc., under product designation PG-33; polyethylene terephthalate (PET) was purchased from Huarun packaging materials, inc., product designation CR-8828.
Shaping agent: is Fischer-Tropsch wax 105, available from Shell, having a product designation SX-105
Plasticizer: is naphthenic oil, purchased from krama y, xinjiang, and has a product number of 4010.
Filling: is a mixture of white carbon black and light activated calcium carbonate with the weight ratio of 1:2; the specific surface area of the white carbon black is 200 +/-30 m 2 (ii)/g, available from wacker chemical company, product designation HDKN20; the light activated calcium carbonate is purchased from Jiangxi Bairui calcium carbonate Co., ltd, and the product model is 1250 meshes.
1# compatibilizer: maleic anhydride polyethylene graft copolymer available from dupont chemical company under product designation E226;
2# compatibilizer: the weight ratio of the maleic anhydride styrene graft copolymer and the maleic anhydride hydrogenated styrene graft copolymer is 1:2; the maleic anhydride styrene graft copolymer is purchased from Dongguan Hongkai plastic company, and the product code is HK1000; the maleic anhydride hydrogenated styrene graft copolymer is purchased from Dongguan Hongkai plastics company, and the product code is M500SE.
Lubricant: is a silicone master batch which is purchased from the chemical material limited of star beida (Beijing) and has the product code of ST-LS301.
Antioxidant: comprises a primary antioxidant and a secondary antioxidant, wherein the primary antioxidant is 1010, the chemical name is tetra [ beta- (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, the product is purchased from Pasteur company, and the product number is Irganox1010; the auxiliary antioxidant is 168, has a chemical name of tris [2, 4-di-tert-butylphenyl ] phosphite, is purchased from Pasteur company, and has a product number of Irgafos168; the weight ratio of the primary antioxidant to the secondary antioxidant is 1:2.
Titanium dioxide: purchased from dupont under the product designation R706;
the preparation method of the nose bridge strip material of the all-plastic mask comprises the following steps:
(1) Mixing and stirring: firstly, mixing and stirring a styrene elastomer and a plasticizer at the temperature of 60 ℃ for 25 minutes, and then uniformly mixing and stirring the styrene elastomer and the plasticizer with polypropylene, polyethylene, a reinforcing agent, a setting agent, a compatilizer, a lubricant, an antioxidant, a filler and titanium dioxide at the temperature of 80 ℃ for 8 minutes to obtain a mixture A;
(2) Melting and mixing: adding the mixture A obtained in the step (1) into a double-screw extruder with the length-diameter ratio of 56 1 and the rotating speed of 350rpm for melting and mixing, and sequentially carrying out extrusion, bracing, air cooling, grain cutting and drying procedures or underwater granulation procedures, wherein the temperature of each section of the screw is respectively as follows: 170 ℃ in the first zone, 180 ℃ in the second zone, 195 ℃ in the third zone, 210 ℃ in the fourth zone, 245 ℃ in the fifth zone, 245 ℃ in the sixth zone, 245 ℃ in the seventh zone, 245 ℃ in the eighth zone, 245 ℃ in the ninth zone, 245 ℃ in the tenth zone, 245 ℃ in the eleventh zone, 245 ℃ in the twelfth zone and 220 ℃ at the nose head, and finally the full plastic nose bridge strip material is obtained.
EXAMPLE 4 nose bridge strip Material for all-plastic mask
The nose bridge strip material of the all-plastic mask provided by the embodiment is composed of the following raw materials in parts by weight: 45 parts of polyethylene, 10 parts of polypropylene, 3 parts of styrene elastomer, 10 parts of reinforcing agent, 12 parts of setting agent, 3 parts of plasticizer, 10 parts of filler, 4 parts of 1# compatilizer, 0.5 part of 2# compatilizer, 0.5 part of lubricant, 0.5 part of antioxidant and 1.5 parts of titanium dioxide.
The raw material sources are as follows:
polyethylene: is a mixture of high density polyethylene and low density in a weight ratio of 3:1. High density polyethylene, available from majesty petrochemical company, with a product designation HHM5502LW; low density polyethylene, available from Moore petrochemicals, sold under the trade designation PE-LM2720A.
Polypropylene: purchased from Mount Britain petrochemical company, having a product designation PPB-M09 and a flexural modulus of 1180MPa.
Styrene-based elastomer: is a mixture of linear styrene elastomer resin (SBS, styrene content 30%) and linear hydrogenated styrene elastomer resin (SEBS, styrene content 30%) in a weight ratio of 1:2; linear styrene elastomer resin (SBS, styrene content 30% by weight) was purchased from Barlingpetrochemical company under the product designation YH-788; linear hydrogenated styrene elastomer resin (SEBS, 30% styrene by weight) was purchased from Barlingpetrochemical company under the product designation YH-502T.
Reinforcing agent: is a mixture of Polystyrene (PS) and polyethylene terephthalate (PET), and the mass ratio is 1:3; polystyrene (PS) was purchased from Zhenjiang beauty works, inc. under product designation PG-33; polyethylene terephthalate (PET) was purchased from Huarun packaging materials, inc., product designation CR-8828.
Shaping agent: is Fischer-Tropsch wax 105, available from Shell, having a product designation SX-105
Plasticizer: is naphthenic oil, purchased from Clarity company in Xinjiang, and has a product code of 4010.
Filling: is a mixture of white carbon black and light activated calcium carbonate with the weight ratio of 1:2; the specific surface area of the white carbon black is 200 +/-30 m 2 (ii)/g, available from wacker chemical company, product designation HDKN20; the light activated calcium carbonate is purchased from Jiangxi Bairui calcium carbonate Co., ltd, and the product model is 1250 meshes.
1# compatibilizer: maleic anhydride polyethylene graft copolymer available from dupont chemical company under product designation E226;
2# compatibilizer: the weight ratio of the maleic anhydride styrene graft copolymer and the maleic anhydride hydrogenated styrene graft copolymer is 1:2; the maleic anhydride styrene graft copolymer is purchased from Dongguan Hongkai plastic company, and the product number is HK1000; the maleic anhydride hydrogenated styrene graft copolymer is purchased from Dongguan Hongkai plastics company, and the product code is M500SE.
Lubricant: is a silicone master batch which is purchased from the chemical material limited of star beida (Beijing) and has the product code of ST-LS301.
Antioxidant: comprises a primary antioxidant and a secondary antioxidant, wherein the primary antioxidant is 1010, the chemical name is tetra [ beta- (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, the product is purchased from Pasteur company, and the product number is Irganox1010; the auxiliary antioxidant is 168, has a chemical name of tris [2, 4-di-tert-butylphenyl ] phosphite, is purchased from Pasteur company, and has a product number of Irgafos168; the weight ratio of the primary antioxidant to the secondary antioxidant is 1:2.
Titanium dioxide: purchased from dupont under the product designation R706;
the preparation method of the nose bridge strip material of the all-plastic mask comprises the following steps:
(1) Mixing and stirring: firstly, mixing and stirring a styrene elastomer and a plasticizer at the temperature of 60 ℃ for 25 minutes, and then uniformly mixing and stirring the styrene elastomer and the plasticizer with polypropylene, polyethylene, a reinforcing agent, a setting agent, a compatilizer, a lubricant, an antioxidant, a filler and titanium dioxide at the temperature of 80 ℃ for 8 minutes to obtain a mixture A;
(2) Melting and mixing: adding the mixture A obtained in the step (1) into a double-screw extruder with the length-diameter ratio of 56 1 and the rotating speed of 350rpm for melting and mixing, and sequentially carrying out extrusion, bracing, air cooling, grain cutting and drying procedures or underwater granulation procedures, wherein the temperature of each section of the screw is respectively as follows: the temperature of the first zone is 170 ℃, the second zone is 180 ℃, the third zone is 195 ℃, the fourth zone is 210 ℃, the fifth zone is 245 ℃, the sixth zone is 245 ℃, the seventh zone is 245 ℃, the eighth zone is 245 ℃, the ninth zone is 245 ℃, the tenth zone is 245 ℃, the eleventh zone is 245 ℃, the twelfth zone is 245 ℃ and the head temperature is 220 ℃ to finally obtain the all-plastic nose bridge strip material.
EXAMPLE 5 nose bridge strip Material for all-plastic mask
The nose bridge strip material of the all-plastic mask provided by the embodiment is composed of the following raw materials in parts by weight: 48 parts of polyethylene, 8 parts of polypropylene, 3 parts of styrene elastomer, 13 parts of reinforcing agent, 10 parts of setting agent, 0.1 part of plasticizer, 10 parts of filler, 5 parts of 1# compatilizer, 0.5 part of 2# compatilizer, 0.5 part of lubricant, 0.5 part of antioxidant and 1.5 parts of titanium dioxide.
The raw material sources are as follows:
polyethylene: is a mixture of high density polyethylene and low density in a weight ratio of 3:1. High density polyethylene, purchased from the famous petrochemical company, with a product designation HHM5502LW; low density polyethylene, available from Mount petrochemical company, as product number PE-LM2720A.
Polypropylene: purchased from Mount Britain petrochemical company, and having a product designation PPB-M09.
Styrene-based elastomer: is a mixture of a linear styrene elastomer resin (SBS, styrene content 30% by weight) and a linear hydrogenated styrene elastomer resin (SEBS, styrene content 30% by weight) in a weight ratio of 1:2; linear styrene elastomer resin (SBS, styrene weight content 30%) was purchased from Barlin petrochemical company under the product designation YH-788; linear hydrogenated styrene elastomer resin (SEBS, 30% styrene by weight) was purchased from Barlingpetrochemical company under the product designation YH-502T.
Reinforcing agent: is a mixture of Polystyrene (PS) and polyethylene terephthalate (PET); polystyrene (PS) was purchased from Zhenjiangqi beautifiers, inc., under product designation PG-33; polyethylene terephthalate (PET) was purchased from Huarun packaging materials, inc. under product designation CR-8828.
Shaping agent: is Fischer-Tropsch wax 105, available from Shell, having a product designation SX-105
Plasticizer: is naphthenic oil, purchased from Clarity company in Xinjiang, and has a product code of 4010.
Filling: is a mixture of white carbon black and light activated calcium carbonate with the weight ratio of 1:2; the specific surface area of the white carbon black is 200 +/-30 m 2 (ii)/g, available from wacker chemical company, product designation HDKN20; the light activated calcium carbonate is purchased from Jiangxi Bairui calcium carbonate Co., ltd, and the product model is 1250 meshes.
1# compatibilizer: maleic anhydride polyethylene graft copolymer available from dupont chemical company under product designation E226;
2# compatibilizer: is a maleic anhydride styrene graft copolymer and a maleic anhydride hydrogenated styrene graft copolymer in a weight ratio of 1:2; the maleic anhydride styrene graft copolymer is purchased from Dongguan Hongkai plastic company, and the product code is HK1000; the maleic anhydride hydrogenated styrene graft copolymer is purchased from Dongguan Hongkai plastics company, and the product code is M500SE.
Lubricant: is a silicone master batch which is purchased from the chemical material limited of star beida (Beijing) and has the product code of ST-LS301.
Antioxidant: comprises a main antioxidant and an auxiliary antioxidant, wherein the main antioxidant is 1010, the chemical name is tetra [ beta- (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, the product is purchased from Pasf company, and the product number is Irganox1010; the auxiliary antioxidant is 168, the chemical name is tris [2, 4-di-tert-butylphenyl ] phosphite, which is available from basf corporation and the product number is Irgafos168; the weight ratio of the primary antioxidant to the secondary antioxidant is 1:2.
Titanium dioxide: purchased from dupont under the product designation R706;
the preparation method of the nose bridge strip material of the all-plastic mask comprises the following steps of:
(1) Mixing and stirring: firstly, mixing and stirring a styrene elastomer and a plasticizer at the temperature of 60 ℃ for 25 minutes, and then uniformly mixing and stirring the styrene elastomer and the plasticizer with polypropylene, polyethylene, a reinforcing agent, a setting agent, a compatilizer, a lubricant, an antioxidant, a filler and titanium dioxide at the temperature of 80 ℃ for 8 minutes to obtain a mixture A;
(2) Melting and mixing: adding the mixture A obtained in the step (1) into a double-screw extruder with the length-diameter ratio of 56 1 and the rotating speed of 350rpm for melting and mixing, and sequentially carrying out extrusion, bracing, air cooling, grain cutting and drying procedures or underwater granulation procedures, wherein the temperature of each section of the screw is respectively as follows: the temperature of the first zone is 170 ℃, the second zone is 180 ℃, the third zone is 195 ℃, the fourth zone is 210 ℃, the fifth zone is 245 ℃, the sixth zone is 245 ℃, the seventh zone is 245 ℃, the eighth zone is 245 ℃, the ninth zone is 245 ℃, the tenth zone is 245 ℃, the eleventh zone is 245 ℃, the twelfth zone is 245 ℃ and the head temperature is 220 ℃ to finally obtain the all-plastic nose bridge strip material.
EXAMPLE 6 nose bridge strip Material for all-plastic mask
The nose bridge strip material of the all-plastic mask provided by the embodiment is composed of the following raw materials in parts by weight: 50 parts of polyethylene, 7 parts of polypropylene, 3 parts of styrene elastomer, 15 parts of reinforcing agent, 8 parts of setting agent, 0.1 part of plasticizer, 8 parts of filler, 6 parts of 1# compatilizer, 0.5 part of 2# compatilizer, 0.5 part of lubricant, 0.5 part of antioxidant and 1.5 parts of titanium dioxide.
The raw material sources are as follows:
polyethylene: is a mixture of high density polyethylene and low density in a weight ratio of 3:1. High density polyethylene, available from majesty petrochemical company, with a product designation HHM5502LW; low density polyethylene, available from Mount petrochemical company, as product number PE-LM2720A.
Polypropylene: purchased from Moore petrochemicals, having a product designation PPB-M09 and a flexural modulus of 1180MPa.
Styrene-based elastomer: is a mixture of linear styrene elastomer resin (SBS, styrene content 30%) and linear hydrogenated styrene elastomer resin (SEBS, styrene content 30%) in a weight ratio of 1:2; linear styrene elastomer resin (SBS, styrene weight content 30%) was purchased from Barlin petrochemical company under the product designation YH-788; linear hydrogenated styrene elastomer resin (SEBS, 30% styrene by weight) was purchased from Barlingpetrochemical company under the product designation YH-502T.
Reinforcing agent: is a mixture of Polystyrene (PS) and polyethylene terephthalate (PET), and the mass ratio is 1:3; polystyrene (PS) was purchased from Zhenjiangqi beautifiers, inc., under product designation PG-33; polyethylene terephthalate (PET) was purchased from Huarun packaging materials, inc. under product designation CR-8828.
Shaping agent: fischer-Tropsch wax 105, available from Shell, having a product designation SX-105
Plasticizer: is naphthenic oil, purchased from Clarity company in Xinjiang, and has a product code of 4010.
Filling: is a mixture of white carbon black and light activated calcium carbonate with the weight ratio of 1:2; the specific surface area of the white carbon black is 200 +/-30 m 2 (ii)/g, available from wacker chemical company, product designation HDKN20; the light activated calcium carbonate is purchased from Jiangxi Bairui calcium carbonate Co., ltd, and the product model is 1250 meshes.
1# compatibilizer: maleic anhydride polyethylene graft copolymer available from dupont chemical company under product designation E226;
2# compatibilizer: the weight ratio of the maleic anhydride styrene graft copolymer and the maleic anhydride hydrogenated styrene graft copolymer is 1:2; the maleic anhydride styrene graft copolymer is purchased from Dongguan Hongkai plastic company, and the product code is HK1000; the maleic anhydride hydrogenated styrene graft copolymer is purchased from Dongguan Hongkai plastics company, and the product code is M500SE.
Lubricant: is a silicone master batch, which is purchased from the star beida (beijing) chemical materials limited, product number ST-LS301.
Antioxidant: comprises a primary antioxidant and a secondary antioxidant, wherein the primary antioxidant is 1010, the chemical name is tetra [ beta- (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, the product is purchased from Pasteur company, and the product number is Irganox1010; the auxiliary antioxidant is 168, the chemical name is tris [2, 4-di-tert-butylphenyl ] phosphite, which is available from basf corporation and the product number is Irgafos168; the weight ratio of the primary antioxidant to the secondary antioxidant is 1:2.
Titanium dioxide: product item number R706, available from dupont;
the preparation method of the nose bridge strip material of the all-plastic mask comprises the following steps:
(1) Mixing and stirring: firstly, mixing and stirring a styrene elastomer and a plasticizer at the temperature of 60 ℃ for 25 minutes, and then uniformly mixing and stirring the styrene elastomer and the plasticizer with polypropylene, polyethylene, a reinforcing agent, a setting agent, a compatilizer, a lubricant, an antioxidant, a filler and titanium dioxide at the temperature of 80 ℃ for 8 minutes to obtain a mixture A;
(2) Melting and mixing: adding the mixture A obtained in the step (1) into a double-screw extruder with the length-diameter ratio of 56 1 and the rotating speed of 350rpm for melting and mixing, and sequentially carrying out extrusion, bracing, air cooling, grain cutting and drying procedures or underwater granulation procedures, wherein the temperature of each section of the screw is respectively as follows: 170 ℃ in the first zone, 180 ℃ in the second zone, 195 ℃ in the third zone, 210 ℃ in the fourth zone, 245 ℃ in the fifth zone, 245 ℃ in the sixth zone, 245 ℃ in the seventh zone, 245 ℃ in the eighth zone, 245 ℃ in the ninth zone, 245 ℃ in the tenth zone, 245 ℃ in the eleventh zone, 245 ℃ in the twelfth zone and 220 ℃ at the nose head, and finally the full plastic nose bridge strip material is obtained.
EXAMPLE 7 nose bridge strip Material for all-plastic mask
The nose bridge strip material of the all-plastic mask provided by the embodiment is composed of the following raw materials in parts by weight: 53 parts of polyethylene, 6 parts of polypropylene, 3 parts of styrene elastomer, 18 parts of reinforcing agent, 6 parts of setting agent, 1 part of plasticizer, 6 parts of filler, 6 parts of 1# compatilizer, 0.5 part of 2# compatilizer, 0.5 part of lubricant, 0.5 part of antioxidant and 1.5 parts of titanium dioxide.
The raw material sources are as follows:
polyethylene: is a mixture of high density polyethylene and low density in a weight ratio of 3:1. High density polyethylene, purchased from the famous petrochemical company, with a product designation HHM5502LW; low density polyethylene, available from Mount petrochemical company, as product number PE-LM2720A.
Polypropylene: purchased from Mount Britain petrochemical company, having a product designation PPB-M09 and a flexural modulus of 1180MPa.
Styrene-based elastomer: is a mixture of a linear styrene elastomer resin (SBS, styrene content 30% by weight) and a linear hydrogenated styrene elastomer resin (SEBS, styrene content 30% by weight) in a weight ratio of 1:2; linear styrene elastomer resin (SBS, styrene weight content 30%) was purchased from Barlin petrochemical company under the product designation YH-788; linear hydrogenated styrene elastomer resin (SEBS, 30% styrene by weight) was purchased from Barlingpetrochemical company under the product designation YH-502T.
Reinforcing agent: is a mixture of Polystyrene (PS) and polyethylene terephthalate (PET), and the mass ratio is 1:3; polystyrene (PS) was purchased from Zhenjiang beauty works, inc. under product designation PG-33; polyethylene terephthalate (PET) was purchased from Huarun packaging materials, inc., product designation CR-8828.
A setting agent: is Fischer-Tropsch wax 105, available from Shell, having a product designation SX-105
Plasticizer: is naphthenic oil, purchased from Clarity company in Xinjiang, and has a product code of 4010.
Filling: is a mixture of white carbon black and light activated calcium carbonate with the weight ratio of 1:2; the specific surface area of the white carbon black is 200 +/-30 m 2 (ii)/g, available from wacker chemical company, product designation HDKN20; light activated calcium carbonate, available from Jiangxi Bairui calcium carbonateThe product model of the company Limited is 1250 meshes.
1# compatibilizer: maleic anhydride polyethylene graft copolymer available from dupont chemical company under product designation E226;
2# compatibilizer: the weight ratio of the maleic anhydride styrene graft copolymer and the maleic anhydride hydrogenated styrene graft copolymer is 1:2; the maleic anhydride styrene graft copolymer is purchased from Dongguan Hongkai plastic company, and the product number is HK1000; the maleic anhydride hydrogenated styrene graft copolymer is purchased from Dongguan Hongkai plastic company, and the product commodity number is M500SE.
Lubricant: is a silicone master batch which is purchased from the chemical material limited of star beida (Beijing) and has the product code of ST-LS301.
Antioxidant: comprises a primary antioxidant and a secondary antioxidant, wherein the primary antioxidant is 1010, the chemical name is tetra [ beta- (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester, the product is purchased from Pasteur company, and the product number is Irganox1010; the auxiliary antioxidant is 168, the chemical name is tris [2, 4-di-tert-butylphenyl ] phosphite, which is available from basf corporation and the product number is Irgafos168; the weight ratio of the primary antioxidant to the secondary antioxidant is 1:2.
Titanium dioxide: purchased from dupont under the product designation R706;
the preparation method of the nose bridge strip material of the all-plastic mask comprises the following steps:
(1) Mixing and stirring: firstly, mixing and stirring a styrene elastomer and a plasticizer at the temperature of 60 ℃ for 25 minutes, and then uniformly mixing and stirring the styrene elastomer and the plasticizer with polypropylene, polyethylene, a reinforcing agent, a setting agent, a compatilizer, a lubricant, an antioxidant, a filler and titanium dioxide at the temperature of 80 ℃ for 8 minutes to obtain a mixture A;
(2) Melting and mixing: adding the mixture A obtained in the step (1) into a double-screw extruder with the length-diameter ratio of 56 1 and the rotating speed of 350rpm for melting and mixing, and sequentially carrying out extrusion, bracing, air cooling, grain cutting and drying procedures or underwater granulation procedures, wherein the temperature of each section of the screw is respectively as follows: 170 ℃ in the first zone, 180 ℃ in the second zone, 195 ℃ in the third zone, 210 ℃ in the fourth zone, 245 ℃ in the fifth zone, 245 ℃ in the sixth zone, 245 ℃ in the seventh zone, 245 ℃ in the eighth zone, 245 ℃ in the ninth zone, 245 ℃ in the tenth zone, 245 ℃ in the eleventh zone, 245 ℃ in the twelfth zone and 220 ℃ at the nose head, and finally the full plastic nose bridge strip material is obtained.
Comparative example 1
The difference from the example 3 is only the amount of the setting agent, which is as follows: a nose bridge strip material of an all-plastic mask comprises the following raw materials in parts by weight: 40 parts of polyethylene, 13 parts of polypropylene, 5 parts of styrene elastomer, 8 parts of reinforcing agent, 25 parts of setting agent, 5 parts of plasticizer, 10 parts of filler, 3 parts of 1# compatilizer, 1.5 parts of 2# compatilizer, 0.5 part of lubricant, 0.5 part of antioxidant and 1.5 parts of titanium dioxide.
Other sources of raw materials and the mixture ratio and preparation method are the same as those of example 3.
Comparative example 2
The difference from example 3 is only in the amount of styrenic elastomer used, specifically as follows: a nose bridge strip material of an all-plastic mask comprises the following raw materials in parts by weight: 40 parts of polyethylene, 13 parts of polypropylene, 15 parts of styrene elastomer, 8 parts of reinforcing agent, 15 parts of setting agent, 5 parts of plasticizer, 10 parts of filler, 3 parts of 1# compatilizer, 1.5 parts of 2# compatilizer, 0.5 part of lubricant, 0.5 part of antioxidant and 1.5 parts of titanium dioxide.
Other sources of raw materials and the mixture ratio and preparation method are the same as those of example 3.
Comparative example 3
The difference from example 3 is only the amount of the strengthening agent, which is as follows: a nose bridge strip material of an all-plastic mask comprises the following raw materials in parts by weight: 40 parts of polyethylene, 13 parts of polypropylene, 5 parts of styrene elastomer, 25 parts of reinforcing agent, 15 parts of setting agent, 5 parts of plasticizer, 10 parts of filler, 3 parts of 1# compatilizer, 1.5 parts of 2# compatilizer, 0.5 part of lubricant, 0.5 part of antioxidant and 1.5 parts of titanium dioxide.
Other sources of raw materials and the mixture ratio and preparation method are the same as those of example 3.
Comparative example 4
The only difference from example 3 is that no polyethylene is added, the amount of polypropylene is 53 parts, and the other conditions are the same.
Comparative example 5
The only difference from example 3 is that no polypropylene is added, the amount of polyethylene used is 53 parts, and the other conditions are the same.
Comparative example 6
The difference from the example 3 is only that no 2# compatilizer is added, 4.5 parts of 1# compatilizer is used, and the rest conditions are the same.
Comparative example 7
The difference from the example 3 is only that the dosage of the 2# compatilizer is unchanged, the composition ratio is different, the mass ratio of the maleic anhydride styrene graft copolymer to the maleic anhydride hydrogenated styrene graft copolymer is 2:1, and the rest conditions are the same.
Comparative example 8
The difference from example 3 is only in the specific composition of the styrene-based elastomer, which is a mixture of a linear styrene elastomer resin (SBS, having a styrene content of 30%) and a linear hydrogenated styrene elastomer resin (SEBS, having a styrene content of 30%) in a weight ratio of 2:1, and the rest conditions are the same.
Test experiments
1. The physical properties of the nose bridge strip material of the all-plastic mask are as follows:
(1) Since there is no relevant standard for the nose bridge strip of the mask and the material thereof, the physical performance test standard and the test result of each embodiment of the invention are compared with the experience index (see table 1) of the mask industry for the nose bridge strip, wherein the breaking test standard refers to the requirement that the breaking frequency of the nose clip is not less than 20 times in technical Specification for Children masks (GB/T38880-2020).
TABLE 1 nasal bridge strip Performance requirements of the mask industry
Figure BDA0002564677940000161
Remarking:
(1) folding and shaping: folding a nose bridge strip with the length of 10cm in half, holding the folding point for 10 seconds by hands, then opening the nose bridge strip on a horizontal desktop, naturally opening the nose bridge strip, and measuring the opening angle of the nose bridge strip after waiting for 10 seconds or 120 minutes;
(2) and bilateral sizing: the method comprises the steps of folding a nose bridge strip with the length of 10cm in half, holding the folding point for 2 seconds by holding the folding point with hands, then reversely rotating two sides of the nose bridge strip along index fingers of two hands with two hands for 10 seconds, holding the nose bridge strip on a horizontal desktop for 10 seconds, opening the nose bridge strip on the horizontal desktop naturally, and measuring the opening angle of two sides of the nose bridge strip after waiting for 10 seconds or 120 minutes.
(3) And breaking test: the nose bridge strip with the length of 10cm is held by two hands to be folded continuously, and the nose bridge strip does not break within a certain number of times.
(2) The physical property test standards and test results of the examples of the present application are listed in table 2, wherein a lower value of the melt index indicates a lower flowability during material processing and a more stable product size.
Table 2 physical property test results of the examples of the present application
Figure BDA0002564677940000171
As can be seen from the comparison of the above table, the physical performance indexes of the embodiments have small numerical difference, and can meet the experience indexes of the existing industry.
(3) The comparative examples above were tested for various properties according to the methods and criteria of the test tests and the results are given in table 3:
table 3 comparative physical property test results of the present application
Figure BDA0002564677940000172
Figure BDA0002564677940000181
As can be seen from table 3, in comparative example 1, the setting effect is significantly improved with an excessive increase in the amount of the setting agent, but the breaking effect is significantly reduced, and the tensile strength is reduced, which easily causes strip breakage in the processing of the nose bridge strip. This is mainly because the fischer-tropsch wax, after curing, is brittle, non-folding resistant and brittle, and therefore, its addition in excess greatly reduces the tensile strength and folding resistance of the material. In addition, during storage of the material after processing into a finished nasal bridge strip, it was found that after about 5 days the finished nasal bridge strip started to yellow, which may be due to the non-yellowing resistance of the fischer-tropsch wax.
In comparative example 2, the tensile strength and the breaking effect of the material are improved with the excessive increase of the amount of the styrene-based elastomer, but the setting effect is remarkably reduced, which is mainly caused by the elasticity of the styrene-based elastomer, so that the amount of the styrene-based elastomer needs to be strictly controlled, thereby simultaneously improving the setting effect and the folding resistance of the product.
In comparative example 3, with the excessive increase of the amount of the reinforcing agent, the sizing effect is obviously improved, but the breaking effect is obviously deteriorated, and the melt index is obviously reduced, which is unfavorable for processing the nose bridge strip, and in addition, the surface of the prepared finished nose bridge strip product is rough.
In the comparative example 4, polyethylene is not added, the amount of polypropylene is increased, the melt index is reduced, the breaking frequency is obviously reduced, and in the production process of the nose bridge strip, the line diameter is easy to be changed, the line diameter is extremely unstable, and the production speed cannot be improved. In addition, the increase in the amount of polypropylene in comparative example 4 causes the setting effect of the product to be lowered because the components are integrated in the present invention, and although the increase in the amount of polypropylene causes the increase in the amount of the rigid component, the compatibility between polypropylene and other materials is deteriorated, and thus the setting effect is rather lowered.
In comparative example 5, polypropylene was not added, the amount of polyethylene was increased, and the setting effect was deteriorated. In the production process of the nose bridge strip, the broken strip is easy to appear, the wire diameter is not large or small, the wire diameter is extremely unstable, and the production speed cannot be increased.
The polyethylene and the polypropylene have synergistic effect, compared with any single olefin adopted in comparative examples 4 and 5, the setting effect and the folding resistance of the polypropylene/polyethylene composite material in example 3 meet the key performance requirements of the nose bridge strip, and any single olefin can only meet the performance requirements of the nose bridge strip in one of the setting effect and the folding resistance.
The compatibilizer in comparative example 6, which was completely a maleic anhydride polyethylene graft copolymer, reduced the tensile strength and the number of breaks, and the setting effect was not very good. The single maleic anhydride polyethylene graft copolymer has little influence on the improvement of the compatibility of the styrene elastomer and other materials, thereby being not beneficial to the components to play a synergistic effect and causing adverse effect on the product performance. The adoption of the composite compatilizer has a remarkable influence on the improvement of the product performance.
As can be seen from comparative examples 6, 7 and 8, since polyethylene, polypropylene, styrene-based elastomer and reinforcing agent have poor compatibility due to their different polarities, and sufficient fusion must be achieved by means of the compatibilizer, the selection and ratio of the compatibilizer is very important. The adoption of a proper compatilizer and a proper proportion thereof plays a critical role in improving the performance of the product.
The above detailed description is specific to one possible embodiment of the present invention, and the embodiment is not intended to limit the scope of the present invention, and all equivalent implementations or modifications without departing from the scope of the present invention should be included in the technical scope of the present invention.

Claims (10)

1. The nose bridge strip material of the all-plastic mask is characterized by comprising the following components in parts by weight: 30-58 parts of polyethylene, 5-20 parts of polypropylene, 3-10 parts of styrene elastomer, 5-20 parts of reinforcing agent, 0.1-10 parts of plasticizer, 3-20 parts of setting agent, 5-15 parts of filler, 2-8 parts of 1# compatilizer, 0.5-3.5 parts of 2# compatilizer, 0.1-1 part of lubricant, 0.1-1 part of antioxidant and 1-3 parts of titanium dioxide;
the polyethylene is a mixture of high density polyethylene and low density polyethylene with the weight ratio of 3:1;
the polypropylene is high-flexural modulus polypropylene, and the flexural modulus is more than or equal to 800MPa;
the styrene elastomer is a mixture of linear styrene elastomer resin with styrene content of 30-45% and linear hydrogenated styrene elastomer resin with styrene content of 25-40%, and the mass ratio of the linear styrene elastomer resin to the linear hydrogenated styrene elastomer resin is 1.5-3.5;
the reinforcing agent is a mixture of polystyrene and polyethylene terephthalate, and the mass ratio is 1:3;
the plasticizer is naphthenic oil;
the sizing agent is one or more of 58# paraffin, fischer-Tropsch wax 80 and Fischer-Tropsch wax 105;
the filler is a mixture of white carbon black and light activated calcium carbonate with the weight ratio of 1:2;
the 1# compatilizer is maleic anhydride polyethylene graft copolymer; the 2# compatilizer is a mixture of a maleic anhydride styrene graft copolymer and a maleic anhydride hydrogenated styrene graft copolymer, and the mass ratio of the maleic anhydride styrene graft copolymer to the maleic anhydride hydrogenated styrene graft copolymer is 1.5-3.
2. The all-plastic mask nose bridge strip according to claim 1, wherein said styrene-based elastomer is a mixture of a linear styrene elastomer resin having a styrene content of 30% and a linear hydrogenated styrene elastomer resin having a styrene content of 30% in a weight ratio of 1:2.
3. The all-plastic respirator nose bridge strip material according to claim 1, wherein said lubricant is silicone masterbatch.
4. The nose bridge strip material for all-plastic masks according to claim 1, wherein the lubricant is silicone powder; the antioxidant comprises a primary antioxidant and a secondary antioxidant.
5. The plastic respirator nose bridge strip material of claim 4, wherein the weight ratio of the primary antioxidant to the secondary antioxidant is 1:2.
6. The plastic respirator nose bridge strip material according to claim 4, wherein the primary antioxidant is one or more of antioxidant 1010 and antioxidant 1076; the secondary antioxidant is one or more of antioxidant 168 and antioxidant 626.
7. The method for preparing nose bridge strip material of full plastic mask according to any one of claims 1-6, comprising the following steps:
(1) Mixing and stirring: firstly, mixing and stirring a styrene elastomer and a plasticizer, and then uniformly mixing and stirring the styrene elastomer and the plasticizer with polypropylene, polyethylene, a reinforcing agent, a setting agent, a compatilizer, a lubricant, an antioxidant, a filler and titanium dioxide to obtain a mixture A;
(2) Melting and mixing: and (2) adding the mixture A obtained in the step (1) into a double-screw extruder for melting and mixing, and sequentially carrying out extrusion, bracing, air cooling, granulating and drying processes or underwater granulating processes to obtain the nose bridge strip material of the all-plastic mask.
8. The method according to claim 7, wherein the step (1) comprises the steps of: the styrene elastomer and the plasticizer are mixed and stirred for 20-30 minutes at the temperature of 60-65 ℃, and then are mixed and stirred for 5-10 minutes with the polypropylene, the polyethylene, the reinforcing agent, the setting agent, the compatilizer, the lubricant, the antioxidant, the filler and the titanium dioxide at the temperature of 75-85 ℃ to obtain a mixture A.
9. The production method according to claim 7, wherein the length-to-diameter ratio of the twin-screw extruder in the step (2) is 40 to 1, and the rotation speed is 300 to 600rpm.
10. The method for preparing the polypropylene composite material according to claim 9, wherein the length-diameter ratio of the twin-screw extruder in the step (2) is 56; the temperature of each section of the screw is respectively as follows: 170-180 ℃ in the first zone, 180-190 ℃ in the second zone, 190-200 ℃ in the third zone, 200-220 ℃ in the fourth zone, 220-260 ℃ in the fifth zone, 220-260 ℃ in the sixth zone, 220-260 ℃ in the seventh zone, 220-260 ℃ in the eighth zone, 220-260 ℃ in the ninth zone, 220-260 ℃ in the tenth zone, 220-260 ℃ in the eleventh zone, 220-260 ℃ in the twelfth zone, and 210-240 ℃ in the head.
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