CN106633315A - Crosslinked-polyethylene hot-water pipe material and preparation method thereof - Google Patents
Crosslinked-polyethylene hot-water pipe material and preparation method thereof Download PDFInfo
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- CN106633315A CN106633315A CN201710007174.4A CN201710007174A CN106633315A CN 106633315 A CN106633315 A CN 106633315A CN 201710007174 A CN201710007174 A CN 201710007174A CN 106633315 A CN106633315 A CN 106633315A
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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
-
- 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
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/04—After-treatment of articles without altering their shape; Apparatus therefor by wave energy or particle radiation, e.g. for curing or vulcanising preformed articles
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- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
- C08K5/156—Heterocyclic compounds having oxygen in the ring having two oxygen atoms in the ring
- C08K5/1565—Five-membered rings
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/17—Amines; Quaternary ammonium compounds
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3477—Six-membered rings
- C08K5/3492—Triazines
- C08K5/34924—Triazines containing cyanurate groups; Tautomers thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
-
- 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
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/24—Crystallisation aids
-
- 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
- C08L2312/00—Crosslinking
- C08L2312/06—Crosslinking by radiation
Abstract
The invention discloses a crosslinked-polyethylene hot-water pipe material and a preparation method thereof. The pipe material is prepared from the following raw materials in parts by weight: 100 parts of polyethylene, 0.1-5.0 parts of a free-radical photoinitiator, 0.1-5.0 parts of a multifunctional crosslinking agent, 0.1-5.0 parts of a crosslinking accelerator, 0.1-5.0 parts of a transparent agent and 0.1-5.0 parts of a complex antioxidant. The adopted ultraviolet-radiation crosslinking method is low in device investment, simple in operation, energy-saving and environmentally friendly, high in production efficiency, and low in product cost, and the obtained products have excellent properties.
Description
Technical field
The present invention relates to chemical material field, is exactly a kind of crosslinked polyethylene hot water tubing and preparation method thereof.
Background technology
Crosslinked polyethylene is with its unique molecular structure (three-dimensional netted thermoset structure) and excellent performance (such as resistance to pressure
Degree is big, temperature classification is high, corrosion resistance and good, its tubing article under conditions of 90 DEG C, 2.0MPa service life up to 50 years)
It is widely used in the fields such as floor heating, changes in temperature feedwater and electric wire.
With the continuous aggravation of global energy tense situation, the popularization and application of power-saving technology-floor panel heating are obtained
Significant progress, the market demand of cross-linked polyethylene pipe is also in cumulative year after year.
The shortcomings of low polyethylene heat distortion temperature itself, creep resistance and not enough rigidity are improved after polyethylene crosslinking,
The aspects such as heat resistance, resistance to ag(e)ing, resisting environmental stress and cracking are all greatly improved so as to become optimal hot water tubing it
One.
According to the difference of crosslinking method, crosslinked polyethylene pipe can be divided at present peroxide crosslinked polyethylene (PE-Xa) pipe,
Organosilane crosslinked polyethylene (PE-Xb) is managed and radiant crosslinked polyethylene (PE-Xc) pipe.
PE-Xa tubing is that PE, peroxide cross-linking agent mixing are added in batch impact type extruder and produced.High temperature is high
The strand of pressure PE realizes chemical crosslinking under the initiation of peroxide cross-linking agent.
PE-Xb tubing is first PE and vinyl silanes to be grafted in an extruder into prepared crosslinkable Silane Grafted PE pipes
Material, then crosslinking in the presence of a catalyst.
PE-Xc tubing is first with common pipe extruder extruding pipe material, then in doses in irradiation devices
Under high-energy ray effect, a part of main chain or side chain in PE molecular structures is interrupted by high-energy ray, produces free radical, and these are certainly
Cross-bond is formed in conjunction with rear by base each other.
But Peroxide-crosslinked Pe Pipe has speed of production extremely slow, and stability is difficult to control to, energy consumption is big, crosslinking
The shortcomings of degree is not high.Silane cross-linked polyethylene pipe has and easily produce that precrosslink, raw material storage time is short, the degree of cross linking is unstable
Needing to carry out prolonged water after fixed, tube extrusion shaping to boil just can be crosslinked, the shortcomings of cause long the production cycle.Radiation is handed over
The extrusion of connection polyvinyl piping materials is kept completely separate with crosslinking, and extrusion capacity is unrestricted, and the yield of product is determined completely by radiative process,
It is to obtain equal but the major defect of this method is extremely huge to the emittance needed for heavy in section product (such as thick-walled pipe)
Even crosslink density, product need to be rotated ceaselessly, and speed is extremely slow.Simultaneously equipment investment cost is fairly expensive, Operation and Maintenance is complicated,
Requirement of shelter is harsh.
In recent years, ultraviolet light irradiation cross-linking technology has been successfully applied to wires and cables industry, and the technology has uniqueness
Advantage：Required cross-linking apparatus invest low, process is simple, convenient operating maintenance, energy-conserving and environment-protective, production efficiency height, product cost
It is low, high-temperature stability and good mechanical performance, simultaneously because using ultraviolet light as irradiation bomb, being applicable to manufacture different size
Product.But UV radiation techniques cause penetration power relatively low because the energy of ultraviolet light is relatively low, therefore need to melt in product
Cross-linking radiation is carried out under pellucidity.Polyethylene carries out in the cooling condition ultraviolet light irradiation and cannot then obtain the crosslinking of satisfaction
Degree, because crystallizing after polyethylene cooling, the opaque friendship for causing ultraviolet light to penetrate and cannot be satisfied with of the material after crystallization
Connection degree.For example during ultraviolet light irradiation cross-linking polyethylene wire and cable material irradiation need to be carried out at outlet of extruder, be can be only achieved
The qualified degree of cross linking.But the production of tubing is different from electric wire, tubing needs to carry out cooling sizing first after the extrusion, only
Next step process can be just carried out after cooling sizing.As carried out after ultraviolet light irradiation cross-linking sizing again immediately after the extrusion, then can be by
Have occurred that crosslinking causes sizing inaccurate in tubing.
The content of the invention
The invention solves the problems that the existing peroxide method for preparing cross-linked polyethylene pipe is present, energy ezpenditure is big, produce effect
Rate is low；Silane cross-linking method easily produces precrosslink, raw material storage time is short, need to carry out long-time water boils, long the production cycle；Radiation
There is equipment investment height in cross-linking method, Operation and Maintenance is complicated, the problem that requirement of shelter is harsh, and provides a kind of ultraviolet light cross-linking poly- second
Alkene hot water tubing and preparation method thereof.
A kind of crosslinked polyethylene hot water tubing, it is characterised in that：It is obtained by the raw material of following weight parts：100 parts are gathered
Ethene, 0.1-5.0 part free radical photo-initiations, 0.1-5.0 part multi-group crosslink agents, 0.1-5.0 part crosslinking accelerators, 0.1-
5.0 parts of clarifiers and 0.1 part of -5.0 parts of composite antioxidant.
Described a kind of ultraviolet light cross-linking polyethylene hot water tubing, it is characterised in that the polyethylene is high-density polyethylene
One or more in alkene HDPE, low density polyethylene, medium density polyethylene MDPE and LLDPE LLDPE
Combination.
Described a kind of ultraviolet light cross-linking polyethylene hot water tubing, it is characterised in that the radical initiator is to rest in peace
The combination of one or more in fragrant double methyl ether, dialkylacetophenones, Oxoxanthone, anthraquinone or benzophenone and its derivative.
Described a kind of ultraviolet light cross-linking polyethylene hot water tubing, it is characterised in that the multi-group crosslink agent is three
Paracyanogen acid triallyl, cyamelide triallyl, trimethylolpropane tris (methyl) acrylate, trimethylolpropane tris
One or several in allyl ether, the allyl ether of pentaerythrite three, the allyl ether of pentaerythrite four and triethylene glycol methacrylate
Combination.
Described a kind of ultraviolet light cross-linking polyethylene hot water tubing, it is characterised in that the crosslinking accelerator is dimethyl
The combination of one or more in aniline, diethylaniline, methylimidazole, diethyl imidazolium and its derivative.
Described a kind of ultraviolet light cross-linking polyethylene hot water tubing, it is characterised in that the clarifier is two benzal sorbs
One kind in alcohol, two (to monomethyl benzal) sorbierites, two (replacing benzal to chlorine) sorbierites and sorbierite benzal derivatives or
Several combinations.
A kind of ultraviolet light cross-linking polyethylene hot water tubing according to claim 1, it is characterised in that described compound anti-
Oxygen agent by phenolic antioxidant, phosphite ester kind antioxidant, phosphoric acid ester antioxidant and containing sulphur ester antioxidant in two kinds or two
Plant composition described above.
A kind of preparation method of ultraviolet light cross-linking polyethylene hot water tubing is comprised the following steps：
(1) each raw material is taken by weight, and high-speed stirred uniformly obtains compound；
(2) extruding machine is heated to into 120-250 DEG C, puts into the compound that step (1) is obtained, then extruded, cooled down
Sizing；
(3) material after cooling and shaping in step (2) is a length of using ultraviolet light wave by ultraviolet light irradiation cross-linking apparatus
300-400nm, power density 500-8000mW/cm2Ultraviolet source carry out cross-linking radiation, light application time 1-30s obtains ultraviolet
Photo crosslinked polyethylene tubing.
Beneficial effects of the present invention are：
Present invention optimizes preparing crosslinking poly- using the method for ultraviolet light irradiation cross-linking on the basis of polythene material formula
Ethene hot water tubing.
Have that energy ezpenditure is big, low production efficiency for peroxide method；Silane cross-linking method easily produces precrosslink, raw material
Storage time is short, need to carry out long-time water boils, long the production cycle；It is high to there is equipment investment in radiation cross-linking process, Operation and Maintenance is complicated,
The shortcomings of requirement of shelter is harsh, the present invention provides a kind of method of ultraviolet light irradiation cross-linking to overcome lacking for above-mentioned conventional method
Point.The equipment investment of ultraviolet light irradiation cross-linking method is low, simple to operate, energy-conserving and environment-protective, production efficiency are high, product cost is low, gained
The function admirable of product.
For due to polyethylene, after the cooling period ultraviolet light cross-linking efficiency is low so that it cannot obtain the gratifying degree of cross linking
The characteristics of, the present invention has made substantial amounts of experiment sieving to polyethylene ultraviolet light cross-linking formulating of recipe for pipes system, finds by being crosslinked conjunction
Appropriate crosslinking accelerator and transparent nucleator.The ultraviolet light cross-linking efficiency and correlated performance of polyethylene under the state of cooling can be made
It is significantly improved.
Specific embodiment
Below in conjunction with preferred embodiment, and the measurement parameter of tubing is further illustrated reconciliation to the present invention
Release.
Embodiment one
The present embodiment ultraviolet light cross-linking polyethylene hot water tubing and preparation method thereof is carried out according to the following steps：
First, 100 parts of high density polyethylene (HDPE)s (5000S), 2.5 parts of BDK, 1.8 parts of TAIC, 2.5 parts of friendships are weighed by weight
Connection accelerator diethylaniline, 0.7 part of clarifier dibenzal sorbitol, 0.2 part of antioxidant 300 and 0.2 part of TPP；
2nd, above raw material is stirred in batch mixer with the speed of 250rpm and obtain compound after 10min；
3rd, extruding machine is preheating to into 170 DEG C, puts into the compound that step 2 is obtained so that compound is fully plastified, extrusion
And enter diameter-setting equipment；
4th, after sizing terminates, irradiation is carried out in ultraviolet light irradiation cross-linking apparatus, using a length of 385nm of ultraviolet light wave,
Power density 6000mW/cm2Ultraviolet source carry out cross-linking radiation, average light application time 2s obtains ultraviolet light irradiation cross-linking and gathers
Ethene hot water tubing.
Embodiment two
First, weigh by weight 75 parts of high density polyethylene (HDPE)s (5000S), 25 parts of LLDPEs (7042),
2.2 parts of 4- chlorobenzophenones, 1.2 parts of TMPTA, 1.2 parts of crosslinking accelerator methylimidazoles, 0.5 part of clarifier two (replace to chlorine
Benzal) sorbierite, 0.3 part of antioxidant 1010 and 0.1 part of DLTP；
2nd, above raw material is stirred in batch mixer with the speed of 250rpm and obtain compound after 8min；
3rd, extruding machine is preheating to into 165 DEG C, puts into the compound that step 2 is obtained so that compound is fully plastified, extrusion
And enter diameter-setting equipment；
4th, after sizing terminates, irradiation is carried out in ultraviolet light irradiation cross-linking apparatus, using a length of 365nm of ultraviolet light wave,
Power density 5000mW/cm2Ultraviolet source carry out cross-linking radiation, average light application time 3s obtains ultraviolet light irradiation cross-linking and gathers
Ethene hot water tubing.
Contrast test (is not added with crosslinking accelerator and clarifier, remaining raw material and embodiment two in this contrast test raw material
It is identical)
First, weigh by weight 75 parts of high density polyethylene (HDPE)s (5000S), 25 parts of LLDPEs (7042),
2.2 parts of 4- chlorobenzophenones, 1.2 parts of TMPTA, 0.3 part of antioxidant 1010 and 0.1 part of DLTP；
2nd, above raw material is stirred in batch mixer with the speed of 250rpm and obtain compound after 8min；
3rd, extruding machine is preheating to into 165 DEG C, puts into the compound that step 2 is obtained so that compound is fully plastified, extrusion
And enter diameter-setting equipment；
4th, after sizing terminates, irradiation is carried out in ultraviolet light irradiation cross-linking apparatus, using a length of 365nm of ultraviolet light wave,
Power density 5000mW/cm2Ultraviolet source carry out cross-linking radiation, average light application time 3s obtains ultraviolet light irradiation cross-linking and gathers
Ethene hot water tubing.
Embodiment one and the gained crosslinked polyethylene hot-water line of embodiment two are tested, the data obtained such as following table：
Ultraviolet light cross-linking polyethylene hot water tube material is Jing after ultraviolet light irradiation cross-linking in embodiment one and embodiment two, performance
It is excellent, the performance requirement of crosslinking hot-water line can be met completely.And do not add crosslinking accelerator and thoroughly in testing as a comparison
Bright dose, its degree of cross linking is only 23.2%, tensile strength 17.8MPa, while thermal aging test cannot pass through.
Claims (8)
1. a kind of crosslinked polyethylene hot water tubing, it is characterised in that：It is obtained by the raw material of following weight parts：100 parts of poly- second
Alkene, 0.1-5.0 part free radical photo-initiations, 0.1-5.0 part multi-group crosslink agents, 0.1-5.0 part crosslinking accelerators, 0.1-
5.0 parts of clarifiers and 0.1 part of -5.0 parts of composite antioxidant.
2. a kind of ultraviolet light cross-linking polyethylene hot water tubing according to claim 1, it is characterised in that the polyethylene is
In high density polyethylene, low density polyethylene, medium density polyethylene MDPE and LLDPE LLDPE
One or more combination.
3. a kind of ultraviolet light cross-linking polyethylene hot water tubing according to claim 1, it is characterised in that the free radical draws
It is benzoin dimethylether, dialkylacetophenones, Oxoxanthone, anthraquinone or benzophenone and its one kind or several in derivative to send out agent
The combination planted.
4. a kind of ultraviolet light cross-linking polyethylene hot water tubing according to claim 1, it is characterised in that the polyfunctional group
Crosslinking agent is TAC, cyamelide triallyl, trimethylolpropane tris（Methyl）Acrylate, three hydroxyls
In the allyl ether of methylpropane three, the allyl ether of pentaerythrite three, the allyl ether of pentaerythrite four and triethylene glycol methacrylate one
Plant or several combinations.
5. a kind of ultraviolet light cross-linking polyethylene hot water tubing according to claim 1, it is characterised in that the crosslinking promotes
Agent is the group of one or more in dimethylaniline, diethylaniline, methylimidazole, diethyl imidazolium and its derivative
Close.
6. a kind of ultraviolet light cross-linking polyethylene hot water tubing according to claim 1, it is characterised in that the clarifier is
Dibenzal sorbitol, two（To monomethyl benzal）Sorbierite, two（Benzal is replaced to chlorine）Sorbierite and sorbierite benzal derivative
In the combination of one or more.
7. a kind of ultraviolet light cross-linking polyethylene hot water tubing according to claim 1, it is characterised in that the compound antioxygen
Agent by phenolic antioxidant, phosphite ester kind antioxidant, phosphoric acid ester antioxidant and containing sulphur ester antioxidant in two kinds or two kinds
Composition described above.
8. a kind of preparation method of ultraviolet light cross-linking polyethylene hot water tubing as claimed in claim 1, it is characterised in that include
Following steps：
（1）Each raw material is taken by weight, and high-speed stirred uniformly obtains compound；
（2）Extruding machine is heated to into 120-250 DEG C, step is put into（1）The compound for obtaining, is then extruded, cooling and shaping；
（3）In step（2）Material after middle cooling and shaping passes through ultraviolet light irradiation cross-linking apparatus, using a length of 300- of ultraviolet light wave
400nm, power density 500-8000mW/cm2Ultraviolet source carry out cross-linking radiation, light application time 1-30s obtains ultraviolet light friendship
Connection polyvinyl piping materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710007174.4A CN106633315A (en) | 2017-01-05 | 2017-01-05 | Crosslinked-polyethylene hot-water pipe material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710007174.4A CN106633315A (en) | 2017-01-05 | 2017-01-05 | Crosslinked-polyethylene hot-water pipe material and preparation method thereof |
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| Publication Number | Publication Date |
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| CN106633315A true CN106633315A (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710007174.4A Pending CN106633315A (en) | 2017-01-05 | 2017-01-05 | Crosslinked-polyethylene hot-water pipe material and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109485974A (en) * | 2018-11-19 | 2019-03-19 | 河北朔龙塑料制品有限公司 | A kind of ultraviolet light irradiation cross-linking insulating material of polyethylene |
| WO2021001143A1 (en) | 2019-07-01 | 2021-01-07 | Borealis Ag | Pipe made of peroxide-crosslinked polyethylene of high uv stability |
| CN112662041A (en) * | 2020-12-21 | 2021-04-16 | 青岛润兴塑料新材料有限公司 | Ultraviolet irradiation crosslinking POE transparent hose and preparation method thereof |
| CN116535771A (en) * | 2023-05-05 | 2023-08-04 | 宁波聚久全塑料制品有限公司 | High-light-transmittance PP (Polypropylene) and PE (polyethylene) composite material as well as preparation method and application thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109485974A (en) * | 2018-11-19 | 2019-03-19 | 河北朔龙塑料制品有限公司 | A kind of ultraviolet light irradiation cross-linking insulating material of polyethylene |
| WO2021001143A1 (en) | 2019-07-01 | 2021-01-07 | Borealis Ag | Pipe made of peroxide-crosslinked polyethylene of high uv stability |
| CN112662041A (en) * | 2020-12-21 | 2021-04-16 | 青岛润兴塑料新材料有限公司 | Ultraviolet irradiation crosslinking POE transparent hose and preparation method thereof |
| CN116535771A (en) * | 2023-05-05 | 2023-08-04 | 宁波聚久全塑料制品有限公司 | High-light-transmittance PP (Polypropylene) and PE (polyethylene) composite material as well as preparation method and application thereof |
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