CN86102487A - High-modulus polypropylene braided fabric for laver processing - Google Patents

High-modulus polypropylene braided fabric for laver processing Download PDF

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CN86102487A
CN86102487A CN86102487.7A CN86102487A CN86102487A CN 86102487 A CN86102487 A CN 86102487A CN 86102487 A CN86102487 A CN 86102487A CN 86102487 A CN86102487 A CN 86102487A
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laver
high modulus
polypropylene
braid
modulus polypropylene
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CN1009703B (en
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中义允
纲中良明
渕上博美
茂木勉
青木一男
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JNC Corp
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Chisso Corp
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L17/00—Food-from-the-sea products; Fish products; Fish meal; Fish-egg substitutes; Preparation or treatment thereof
    • A23L17/60—Edible seaweed
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/12—Chemical modification
    • 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
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/013—Fillers, pigments or reinforcing additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2500/00—Characteristics or properties of obtained polyolefins; Use thereof
    • C08F2500/12—Melt flow index or melt flow ratio
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/10—Homopolymers or copolymers of propene
    • C08J2423/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2427/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/582—Recycling of unreacted starting or intermediate materials

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Zoology (AREA)
  • Nutrition Science (AREA)
  • Food Science & Technology (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Edible Seaweed (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The knitted fabric for laver has the characteristics of enough rigidity, high impact strength, long-term repeated use, smooth surface, economy and applicability. It is a high modulus polypropylene braided fabric, and is made by molding polypropylene with the system between isotactic pentad ratio and MFR (melt flow rate) in the range of 1.00-P.gtoreq.0.015 LogMFR + 0.955.

Description

Braided product of high-stiffness polypropylene for laver
The present invention is the braid (" braided product " speech of mentioning in the specification of application is the translated name of Chinese character " bed mat made of woven strips of bamboo " now, but often can not express with a suitable translated name) of relevant high-stiffness polypropylene for laver.In more detail, the laver high modulus polypropylene fabric of indication of the present invention is to be molded as clava with its isotactic Unit five earlier than the polypropylene (being called high modulus polypropylene with F) of the relation between (P) and the melt flow rate (MFR) (MFR) in 1.00 〉=P 〉=0.015Log-MFR+0.955 scope, forms with the clava braiding again.
Be commonly used to the braid of the dried laver of production sheet with synthetic resin at present, the synthetic resin of wherein producing braid mainly adopts polypropylene, it cheap, and its pressing is considerably high temperature resistant.But there is following defective in the polypropylene woven thing: when used (1), laver was very weak to its adhesion, causes the sheet laver to separate from braid easily under leather hard.(2) after the laver drying, the rigidity of braid is not enough to bear the convergent force that the sheet laver is produced.
In order to overcome above-mentioned first defective (adhesion deficiency), many different technologies have been adopted.For example laver carries out surface oxidation treatment with the blank (clava) of braid or braid by ways such as discharge, flame, mixed acid; Direct surperficial coated chloridized polyolefin solution at it; In polypropylene, sneak into unsaturated carboxylic acid or its derivative modified polyolefin, make the technology of laver with braid through mold pressing; Also have other or the like.
On the other hand as overcome the employed method of second defective (rigidity deficiency) be with various inorganic fillers such as talcum, calcium carbonate, mica, barium sulfate, asbestos or with other suitable thermoplastic resin such as polystyrene, ABS resin etc. to be blended in right amount in the polypropylene as raw material, use the raw material of this mixture then as mold pressing.
But this when inorganic filler being arranged or sneaking into the blend of material resin when using, variety of issue has appearred.In respect of: the lightweight characteristics of polypropylene have been subjected to destruction; Have, owing to reduced this performance of high impact, when laver peeled dry sheet laver with braid, often the clava as the braid material was subjected to partial destruction after drying process is finished again.Also have, after polypropylene adds inorganic filler or styrene resin, can form trickle rough pit on the clava surface.Its result produces in the dry plate shape laver, and the water yield that is attached to the surface increases; The dry time will prolong; Dry expense is to increase; And the dry like this dry plate shape laver that is produced is rough, and finished product was both matt, and quality is poor again.Usually when braid is reused, the fine debris of laver sticks to its surface, so need sometimes fragment is washed off in addition.In this case, form trickle uneven on its surface with containing above-mentioned braid that filler or the mold pressing of resin alloy material make, thereby be difficult to the fine debris of laver is removed clean, the fragment that does not eliminate can be transferred to the surface that next time produces dry plate shape laver with braid as impurity, thereby can reduce the quality of dry plate shape laver.Have in the processing of this manufacturing laver with also having a problem in the method for braid, that is exactly when preparation is added with the blend of inorganic filler or similar resin again, must increase that a step mixes and the operation of kneading, is uneconomic therefore.
Yet without filler or other material and polypropene blended and annotate laver with simple polypropylene mould and with braid following problems is arranged aborning, therefore its practicality is very poor:
Because constitute the clava shortage rigidity of laver, original smooth braid is bent when dry And shrinks when pressure wet laver thereon does, thereby blocked hot-air channel by the mechanical type drier with braid.
Owing to the obstruction of above-mentioned passage makes instrument internal be in boiling and seals vexed state and kill laver cell, the sheet laver product of drying becomes muddiness and is fading as a result, and quality is obviously bad.Otherwise during strip off, often the crooked position at braid makes dried laver fragmentation to the sheet laver of drying from braid.
The inventor etc. have carried out research extensively and profoundly at producing laver processing with the relevant above-mentioned technical problem of the polypropylene fat of braid.Just, we have found a kind of synthetical resin products to have the desired rigidity of braid; High impact strength is arranged, and product can stand prolonged and repeated use; Can be made into and have smooth surface for making the clava that braid is used; And it is economic and practical again.We have found a kind of isotaxy Unit five can satisfy the polypropylene dedicated resin (hereinafter being called high modulus polypropylene) of following formula condition than the relation between (P) (isotactic pentadrafio) and its melt flow rate (MFR) (MFR) as a result, and it can meet above-mentioned every requirement:
1.00≥P≥0.015LogMFR+0.955
From above apparent, purpose of the present invention is intended to provide the braid of main laver processing usefulness, and it is to form with the clava braiding, even and if clava is not form with not sneaking into the high modulus polypropylene molding that inorganic filler or similar additive also have a good rigidity.From explanation hereinafter, will understand other purpose of the present invention.
(1) a kind of braided product of high-stiffness polypropylene for laver of making by the polypropylene mold pressing, polyacrylic isotaxy Unit five than the relation between (P) and its MFR between following scope
1.00≥P≥0.015LogMFR+0.955
(hereinafter being called high modulus polypropylene).
(2) by above-mentioned the 1st joint laver high modulus polypropylene fabric, wherein adopt the high modulus polypropylene of 0.5 〉=MFR 〉=25.
(3) account for gross weight 20% or 20% following thermoplastic resin (not comprising polyolefin) by above-mentioned the 1st joint laver with being mixed with in the used high modulus polypropylene of high modulus polypropylene fabric to account for the inorganic filler below gross weight 15% or 15% or can sneak into.
The described laver of (4) the 1st joints is used in the high modulus polypropylene fabric a kind of chloridized polyolefin of surperficial coated of pressing.
The described braid of (5) the 1st joints is to weave with the clava of high modulus polypropylene molding to form.
(6) above-mentioned the 1st joint laver is surperficial through oxidation processes with pressing in the high modulus polypropylene fabric.
(7) by the described braid of above-mentioned the 1st joint, wherein pressing is made up of clava, and some clava is promptly to replace with the plain polypropylene clava without high modulus polypropylene.
Flesh and blood of the present invention and effect will be described in more detail.
The used high modulus polypropylene resin of the present invention means and can satisfy isotaxy Unit five represented in the following expression formula (1) than the relation between (P) and the MFR:
1.00≥P≥0.015LogMFR+0.955……（1）
Wherein isotaxy Unit five refer to contain the isotaxy ratio that useful Unit five are represented in the polypropylene molecular chain than (P), and it is to pass through nuclear magnetic resonance 13C-NMR measures, and sees Macromolecule 8,687(1975).Be the clear and 56-20406/1981 of No. for example in the clear and 58-104907/1983(Japanese patent application No. of Japan patent applicant announce No.) narrated this polyacrylic production method in (document 1).
In addition, as far as our knowledge goes, still Nobody Knows before at above-mentioned document 1 application date of filling (on December 17th, 1981) for above-mentioned high modulus polypropylene.
Have, all giving birth to not according to above-mentioned document 1 disclosed method produced most of high-crystallinity polypropylenes that And adopts alternate manner to express degree of crystallinity and do not satisfied isotaxy Unit five that above-mentioned (1) formula explains than the relation between (P) and the MFR (seeing document 1) again.
With the exception of this, when adopting in the document 1 high modulus polypropylene, can expect, generally all can obtain the pressing of high-modulus.Yet laver processing of the present invention is prolonged and repeated uses of dried laver sheet energy of wanting the energy quality of production high with the needed basic characteristics of braid, and laver has with braid blank surface treated and for a long time laver had suitable adhesion property; Therefore if do not have strict and long-term actual tests, can not expect whether high modulus polypropylene has the adaptive capacity of material to laver with braid, common goods can expect not have such adaptive capacity.
As the molding methods of high modulus polypropylene of the present invention with identical with the molding methods of braid with common synthetic resin system laver.In other words, utilize extruder that polypropylene is squeezed into the thin tube-like material or is extruded into club-shaped material, then it is cut into certain-length, the clava of gained and line are weaved into be braid then; Perhaps also can be in mould with injection moulding or extrusion process with the Unitarily molded braid of making of polypropylene.
Isotaxy Unit five of this high-modulus propylene must satisfy (1) formula requirement than the numerical value of (P).And its MFR value is unrestricted, but be preferably in 0.5～25 scope.Have again, can use the polypropylene that has pigment, blowing agent or stabilizing agent in case of necessity.In order further to improve the rigidity of moulding article, can add as talcum, mica, calcium carbonate or glass fibre one class inorganic filler, perhaps add other synthetic resin such as polystyrene, HTPS, ABS resin or AS resin.
The addition of this rigidity improver is for inorganic filler, can account for the constituent gross weight 15% or less than 15%, preferably 3～10%, for synthetic resin, can account for below 20% or 20% of constituent gross weight, preferably 5～15%.Even if the addition of these additives surpasses higher limit, bad to the practical function that improves rigidity, if and addition is lower than lower limit, just not obvious to the effect that rigidity is improved, in addition, with regard to laver was used the required known polypropylene miser prescription of braid, often in the implementation process of carrying out blend inorganic filler or synthetic resin, its blending amount got used to surpassing higher limit.It is unfavorable that the result has brought for the surface roughness of pressing (laver is with braid or do the blank of laver with braid).
For laver of the present invention braid, must make laver can stick to the part surface or all surfaces of goods suitably according to any following method:
1. the polyolefin with the modification of a small amount of unsaturated carboxylic acid or derivatives thereof joins in the raw material high modulus polypropylene, perhaps the polypropylene film of this modification is added on the surface of laver with the used molded blank of braid of high modulus polypropylene according to general universal method;
2. chloridized polyolefin is dissolved in solvent, be coated onto or be sprayed onto laver then, one deck chloridized polyolefin film is arranged on braid or blank like this with on braid or its blank;
3. laver is handled through different charging methods with the blank surface that braid uses, as spark, and electric arc or Corona discharge Treatment;
4. blank surface is handled with gas lamp;
5. the blank surface chemicals is handled as mixed acid.
But 4. and 5. method has following point again; Therefore provide in the adhering method with 1.～3. better:
Method 4. be difficult to control adhering strong or a little less than, reach suitable degree, and 5. the problem of food hygiene aspect takes place in method sometimes.
According to method way 1.～4., provide adhesiveness to part clava rather than whole clava, more this clava being woven into laver of the present invention also is desirable with braid.
According to the present invention, the laver made from plain polypropylene is not enough and polypropylene is resolved because of the variety of issue of sneaking into rigidity-modifying agent and bringing with the rigidity of braid, the dry plate shape laver with good quality can be produced in fruitful ground, and laver processing does not almost have the accident of what fracture to take place with braid itself.
The present invention will use example in more detail, and reference example and comparison example are illustrated.
(a) the laver production of braid
Example 1 and 2
With extruder with the high modulus polypropylene (product of Chisso petrochemistry company; Isotaxy Unit five are than (P), 0.955; Melt flow rate (MFR), 7.0 grams/10 minutes) be squeezed into the pipe of 20 millimeters of φ, the spark discharge of extruded tube by being produced between eight pairs of electrodes then, applying voltage is 9 kilovolts, the speed of service is 70 meters/minute.The laver that obtains like this is woven into knitting (example 1) with line again with the stock of braid.
Above-mentioned high modulus polypropylene (25% weight) and modified polypropene (Chisso petrochemistry company product, it is with the way of grafting the maleic anhydride of weight portion 0.3% to be connect skill to isotactic polypropylene; Before the modification, isotaxy Unit five ratio is 0.960, and melt flow rate (MFR) is 15) (75% weight) be squeezed into φ 20 millimeter tube, is woven into laver of the present invention with braid (example 2) with this base material and line again.
Comparison example 1 and 2
Laver with the manufacture method of knitting remove use instead crystalline polypropylene (Chisso petrochemistry company product, trade name is A5017; Melt flow rate (MFR) is 7 grams/10 minutes; Isotaxy Unit five are than (P), 0.925) outside, all with example 1 identical (comparison example 1).
Have, laver uses the manufacture method of knitting except that adding the talcum of 20% weight portion in above-mentioned crystalline polypropylene again, and all the other steps are all with example 1(comparison example 2).
Comparison example 3
Laver uses the manufacture method of knitting except polystyrene (the Asahi Kasei company product with 25% weight portion, trade name is Stylon666, melt flow index 5.5) joins modified polypropene China and foreign countries used in the example 2, all with example 2(comparison example 3).
(b) the laver service test of braid
Every kind of test saves 500 of braids of gained laver with above-mentioned (a), dry plate shape laver is by Japanese Saga (Sagaken), laver in bright (Ariake) county results is made for raw material production, to the bending property of braid, fineness of sheet laver product (particularly its lustrous surface) and the drying property of laver are all estimated.About the drying property of laver, then measure its water content.The result all lists in table 1.
As seen from Table 1, because the laver made from high modulus polypropylene has rigidity height, crooked little with braid, because its basic material has smooth surface, can obtain the high product of commodity value simultaneously with gloss.As what seen from comparison example, because the laver that is made by crystalline polypropylene is low with the rigidity of braid, braid is crooked big, so that thermal air current gets clogged; Thereby making laver sealed by boiling, the commodity value of product is low; And then prolonged drying time.As in comparison example 2 and 3, add talcum or polystyrene in order to improve rigidity, though the bendability of braid is improved, because the surface irregularity of braid basic material makes textile surface rough, the commodity value of this matt product of result is very low.
(a) the laver production of braid
Example 3 and 4 and reference example 1
With the high modulus polypropylene of using in the example 1 (reference example 1), the polypropylene (example 3) that contains 5% talcum, and the polypropylene (example 4) that is added with 5% polystyrene is made raw material respectively, be squeezed into the pipe of 2.0 millimeters of φ with extruder, extrude tubes passes through respectively by chlorinated polypropylene (Superchlon 804M, the trade name of Sanyo Kokusaku paper pulp company product, chlorination degree is 34%) (Superchlon 507 with haloflex, the trade name of Sanyo Kokusaku paper pulp company product, chlorination degree is 68%) mixture (weight ratio formed, 80: 20) 10% acetic ester solution, behind the extruded tube coated solution, through the hot-air drying, be cut into certain-length then, the basic material of gained and line are woven together promptly obtains the laver braid respectively.
Comparison example 4,5,6 and 7
The preparation method of laver usefulness braid is except the talcum of the crystalline polypropylene adding 5% or 10% of usefulness comparison example 1 and 2, all identical with above-mentioned example (comparison example 4 and 5), comparison example 6 and 7 are polystyrene that the comparison example 3 of adding 10% or 25% in above-mentioned polypropylene is used.
(b) the laver service test of braid
Every test with 500 above-mentioned (a) control the laver braid, the dry sheet type laver is by Hyogo,Japan (Hyohgokeu), the coarse laver of quality of alum (Akashi) county results is that raw material is made.The result is as shown in table 2.
As seen from the table, Hyogo (Hyogoken), the coarse laver of the quality of alum (Akashi) county results is when super-dry, and the convergent force of laver when drying is very strong, and braid needs high-modulus.In this case, laver can sustain the convergent force of laver completely as its main basic material with high modulus polypropylene of the present invention with braid; Therefore its crooked Hen Xiao And can be processed into the dry sheet type laver of surface-brightening.
And from improving talcum or the polystyrene quantity that rigidity added, the addition that reaching effect same needs is lacked than the required addition of use crystalline polypropylene; It is not coarse that textile surface seems, so the dry sheet type laver can be made into the glossiness again best buy of surface smoothing.
Is the laver braid that basic material is made with regard to crystalline polypropylene, it need add the rigidity that a large amount of talcums or polystyrene improve braid; Therefore the surface of braid is coarse, and the product quality that the dry sheet type laver is processed into is inferior, and mattness is because the water yield increase of adhering on the braid prolongs drying time.
Figure 86102487_IMG1
Figure 86102487_IMG2
◎ ... goods are rigidity, its bending very little (can use).
Zero ... the rigidity of goods slightly a little less than, and crooked little (can use).
* ... rigidity is weak and crooked big; Therefore dry (can not use) of poor quality
Figure 86102487_IMG3
The dry sheet type laver has good fineness and high commodity value (can use).
... fineness of dry sheet type laver and commodity value all poor slightly (can use).
Figure 86102487_IMG4
Dry sheet type laver external haze, commodity value extreme difference (can not use).

Claims (7)

1, the used polyacrylic isotaxy Unit five of braid made with the high modulus polypropylene molding of laver should be in following scope than the relation between (P) and the melt flow rate (MFR) (MFR)
1.00≥P≥0.015LogMFR+0.955
(below be called high modulus polypropylene).
2, should use the high modulus polypropylene of 0.5 〉=MFR 〉=25 with high modulus polypropylene fabric according to claim 1 laver.
3, account for gross weight 20% or less than the high modulus polypropylene blend of 20% thermoplastic resin (not comprising polyolefin) according to claim 1 laver with adopting in the high modulus polypropylene fabric to contain to account for gross weight 15% or contain less than 15% inorganic filler or employing.
4, according to claim 1 laver with being coated with one deck chloridized polyolefin to the layered product surface in the high modulus polypropylene fabric.
5, can form with the clava braiding of high modulus polypropylene mold pressing with high modulus polypropylene fabric according to claim 1 laver.
6, laver is surperficial through oxidation processes with the moulded work of high modulus polypropylene fabric in the claim 1.
7, laver is made up of clava with the moulded work of high modulus polypropylene fabric in the claim 1, and wherein a part of clava is not with high modulus polypropylene but makes with general polypropylene.
CN86102487A 1985-04-11 1986-04-11 High-modulus polypropylene braided fabric for laver processing Expired CN1009703B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP77315/1985 1985-04-11
JP60077315A JPS61234761A (en) 1985-04-11 1985-04-11 Laver screen made of high-rigidity polypropylene

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Publication Number Publication Date
CN86102487A true CN86102487A (en) 1986-10-08
CN1009703B CN1009703B (en) 1990-09-26

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Publication number Priority date Publication date Assignee Title
US5078943A (en) * 1987-05-11 1992-01-07 Chisso Corporation Process for making small diameter sticks
JP2750484B2 (en) * 1992-02-19 1998-05-13 チッソ株式会社 Polypropylene laver cage

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5581125A (en) * 1978-12-13 1980-06-18 Sumitomo Chem Co Ltd Drawn polypropylene film

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CN1009703B (en) 1990-09-26
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KR910005265B1 (en) 1991-07-24
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