CN104849209A - Pullout testing support and method for modified ultrahigh molecular-weight polyethylene fiber resin - Google Patents

Abstract

The invention relates to a testing support, in particular to a pullout testing support and method for modified ultrahigh molecular-weight polyethylene fiber resin. The pullout testing support comprises a support plate, two side ends of the support plate are provided with testing components respectively, and each testing component comprises a testing platform fixed with the support plate, a paper pipe is arranged below each testing platform, and more than one guide screw is arranged on the outer wall of the support plate. The testing platforms are provided with resin dies distributed correspondingly to the guide screws, and fibers are wound on the paper pipes and are fed into the resin dies through the outer walls of the testing platforms and the guide screws. The method is performed in steps of preparing and starting testing. The pullout testing support and method is simple in structure, outstanding in using performance and excellent in testing effect.

Description

Modified ultra-high molecular weight polyethylene fibre resin extracts test bracket and method

Technical field

The present invention relates to a kind of test bracket, particularly relate to a kind of modified ultra-high molecular weight polyethylene fibre resin and extract test bracket and method.

Background technology

Superhigh molecular weight polyethylene fibers is a kind of fiber that the tygon of molecular weight more than 1,000,000 is obtained by gel spinning process, have that intensity is high, modulus is high, crystallinity is high, density is low and the advantage such as good weatherability properties, be widely used in the fields such as military affairs, Aero-Space, naval vessel, ocean, physical culture and protective articles (shellproof, anti-stab, anti-cutting).

Superhigh molecular weight polyethylene fibers has the high degree of orientation and crystallinity, compact structure; Structural unit is the extended-chain configuration of vinyl, and strand arrangement high-sequential; Macromolecular structure does not have polar group, and without chemical activity, surface energy is very low.It is wetting that said structure feature makes superhigh molecular weight polyethylene fibers be difficult to, and not with matrix generation chemical reaction and produce crosslinked, interfacial effect is poor.When superhigh molecular weight polyethylene fibers is used for ballistic area as reinforcing material, poor and cause shock resistance not enough with resin matrix adhesive property, inadequate to the protection of blunt wound.

Due to the inertia of polyethylene molecule, fiber and interlaminar resin are difficult to bonding, and therefore fiber is not easily by resin wetted, have impact on the mechanical property of superhigh molecular weight polyethylene fibers compound substance, the interlayer shear of such as shellproof UD plate, cross directional stretch and fracture property etc.

In order to change the interface inertia that superhigh molecular weight polyethylene fibers causes because of its structure, the method for modification is often adopted to improve the bond effect with resin boundary surface, for improving shock resistance, the ballistic performance of protective materials.Conventional method of modifying has: surface emissivity grafting, cross-linking modified, blending and modifying, filler modified, corona discharge, Cement Composite Treated by Plasma etc.Through modification, the mechanical property of fiber slightly declines, but the adhesive property between fiber and resin matrix obtains larger improvement, makes compound substance have good combination property.

Adhesive property assay method between modified fibre and resin matrix mainly contains: pulling out method, release method, micro-mull technique and section split method etc.Wherein pulling out method is the method for interface performance between conventional mensuration modified fibre and resin matrix, can obtain interface information intuitively.Pulling out method treats resin solidification after normally fiber being imbedded resin matrix, the intensity that test fiber is extracted in resin matrix.

In fiber and resin embedding process, there is no the fibrous framework of a kind of specification and handled easily, cause fibrous bundle to arrange in resin matrix in a jumble, vertically with resin not embed, embed the defects such as error is large.Spy of the present invention devises a kind of modified ultra-high molecular weight polyethylene fiber monofilament drawing support in resin, make fibrous bundle rule ordered arrangement, vertically embedding is with resin matrix, when using yarn strength machine drawing, fibrous bundle uniform force, improves the accuracy of pull-out strength data.For the interface performance of test fiber (being not only confined to superhigh molecular weight polyethylene fibers) with a certain resin matrix, provide a kind of servicing unit efficiently.

When superhigh molecular weight polyethylene fibers makes compound substance as reinforcing material, often because the chemical inertness of fiber and resin matrix lack necessary cohesiveness, fiber and the gluing interfacial effect of resin very poor, cause composite materials property not reach due index.And when after this fibre modification process, the interface adhesion with resin matrix effectively can be improved, contribute to the mechanical property promoting compound substance.The interfacial bond property of conventional pulling out method inspection modified fibre and resin matrix.But in practical operation, when adopting pulling out method, not have the support of unified, specification regular to imbed resin matrix by neat for fiber, cause test result error larger.

Summary of the invention

The present invention mainly solves the deficiencies in the prior art, provides a kind of compact conformation, and can imbed in resin by neat for fiber rule, the modified ultra-high molecular weight polyethylene fibre resin that improve test accuracy extracts test bracket and method.

Above-mentioned technical matters of the present invention is mainly solved by following technical proposals:

A kind of modified ultra-high molecular weight polyethylene fibre resin extracts test bracket, comprise back up pad, the two side ends of described back up pad is respectively equipped with test suite, described test suite comprises test platform, described test platform and back up pad fix, the below of described test platform is provided with paper tube, the outer wall of described back up pad is provided with more than one conducting wire pole, described test platform is provided with the resin die of distribution corresponding with conducting wire pole, described paper tube is wound with fiber, described fiber is platform outer wall after tested, conducting wire pole enters in resin die.

As preferably, described conducting wire pole and resin die are upper and lower lineal layout, and the bottom of described back up pad is provided with collet, and described paper tube is located between test platform and collet, and described test platform and back up pad are in vertical distribution.

Modified ultra-high molecular weight polyethylene fibre resin extracts the method for testing of test bracket, carries out according to the following steps:

1, prepare before test:

Back up pad is hollow structure, and being bondd by PE plate forms, and is of a size of 300 × 70 × 250mm, and equidistantly boring 5 on it, for installing conducting wire pole; Conducting wire pole is Weaving device universal accessories, is screwed in the hole in back up pad; Resin die material is 304 stainless steels, internal diameter 11.00mm, external diameter 12.45mm, is highly 0.1-1.5mm;

Test platform is PE plate, and bracing frame, test platform are bonded together, and are of a size of 300 × 250 × 8mm, and paper tube and test platform are respectively craft paper matter pipe, paper tube and bracing frame bonding;

2, test is started:

By modified Filament-wound Machine on paper tube, guarantee enough length, follow-up resin can be carried out and extract test; Each paper tube is wound around five groups of fibrous bundles, and picks collodion by one section of loose for fiber 1cm length, ensure fiber loose end obvolvent bunchy;

Again paper tube is laterally placed on collet, by loose fibre end through the conducting wire pole of support, then through the resin die be placed on test platform, then through test platform; Five groups of fibers are repeated aforesaid operations successively, then five groups of fibers that a paper tube is wound around all are fixed on support, each support can place two paper tubes, carry out 10 groups of tests, then resin is poured in resin die, after solidification by be wound around fiber paper tube, take off from support with the mould of cured resin, use universal testing machine test fiber from resin, extract required load, substitute into formula:

$\mathrm{\σ}=\frac{F}{\mathrm{n\πdl}}$

In formula: σ-pull-out strength; F-spike protein gene load; Monofilament radical in n-tow; D-fibre diameter, l-embedded fiber degree of depth;

Calculate pull strength, wherein n, d, l all can measure and draw.

Therefore, modified ultra-high molecular weight polyethylene fibre resin of the present invention extracts test bracket and method, and structure is simple, and usability is outstanding, tests respond well.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

Embodiment

Below by embodiment, Structure Figure, is described in further detail technical scheme of the present invention.

Embodiment 1: as shown in Figure 1, a kind of modified ultra-high molecular weight polyethylene fibre resin extracts test bracket, comprise back up pad 1, the two side ends of described back up pad 1 is respectively equipped with test suite, described test suite comprises test platform 2, described test platform 2 fixes with back up pad 1, the below of described test platform 2 is provided with paper tube 3, the outer wall of described back up pad 1 is provided with more than one conducting wire pole 4, described test platform 2 is provided with the resin die 5 of distribution corresponding with conducting wire pole 4, described paper tube 3 is wound with fiber 6, described fiber 6 is platform 2 outer wall after tested, conducting wire pole 4 enters in resin die 5.

Described conducting wire pole 4 and resin die 5 are in upper and lower lineal layout, and the bottom of described back up pad 1 is provided with collet 7, and described paper tube 3 is located between test platform 2 and collet 7, and described test platform 2 is in vertical distribution with back up pad 1.

Modified ultra-high molecular weight polyethylene fibre resin extracts the method for testing of test bracket, carries out according to the following steps:

1, prepare before test:

Back up pad is hollow structure, and being bondd by PE plate forms, and is of a size of 300 × 70 × 250mm, and equidistantly boring 5 on it, for installing conducting wire pole; Conducting wire pole is Weaving device universal accessories, is screwed in the hole in back up pad; Resin die material is 304 stainless steels, internal diameter 11.00mm, external diameter 12.45mm, is highly 0.1-1.5mm;

Test platform is PE plate, and bracing frame, test platform are bonded together, and are of a size of 300 × 250 × 8mm, and paper tube and test platform are respectively craft paper matter pipe, paper tube and bracing frame bonding;

3, test is started:

By modified Filament-wound Machine on paper tube, guarantee enough length, follow-up resin can be carried out and extract test; Each paper tube is wound around five groups of fibrous bundles, and picks collodion by one section of loose for fiber 1cm length, ensure fiber loose end obvolvent bunchy;

Again paper tube is laterally placed on collet, by loose fibre end through the conducting wire pole of support, then through the resin die be placed on test platform, then through test platform; Five groups of fibers are repeated aforesaid operations successively, then five groups of fibers that a paper tube is wound around all are fixed on support, each support can place two paper tubes, carry out 10 groups of tests, then resin is poured in resin die, after solidification by be wound around fiber paper tube, take off from support with the mould of cured resin, use universal testing machine test fiber from resin, extract required load, substitute into formula:

$\mathrm{\σ}=\frac{F}{\mathrm{n\πdl}}$

In formula: σ-pull-out strength; F-spike protein gene load; Monofilament radical in n-tow; D-fibre diameter, l-embedded fiber degree of depth;

Calculate pull strength, wherein n, d, l all can measure and draw.

Claims (3)

1. a modified ultra-high molecular weight polyethylene fibre resin extracts test bracket, it is characterized in that: comprise back up pad (1), the two side ends of described back up pad (1) is respectively equipped with test suite, described test suite comprises test platform (2), described test platform (2) and back up pad (1) fix, the below of described test platform (2) is provided with paper tube (3), the outer wall of described back up pad (1) is provided with more than one conducting wire pole (4), described test platform (2) is provided with the resin die (5) with conducting wire pole (4) corresponding distribution, described paper tube (3) is wound with fiber (6), described fiber (6) platform (2) outer wall after tested, conducting wire pole (4) enters in resin die (5).

2. modified ultra-high molecular weight polyethylene fibre resin according to claim 1 extracts test bracket, it is characterized in that: described conducting wire pole (4) and resin die (5) are in upper and lower lineal layout, the bottom of described back up pad (1) is provided with collet (7), described paper tube (3) is located between test platform (2) and collet (7), and described test platform (2) and back up pad (1) are in vertical distribution.

3. modified ultra-high molecular weight polyethylene fibre resin according to claim 1 and 2 extracts the method for testing of test bracket, it is characterized in that carrying out according to the following steps:

1, prepare before test:

Back up pad is hollow structure, and being bondd by PE plate forms, and is of a size of 300 × 70 × 250mm, and equidistantly boring 5 on it, for installing conducting wire pole; Conducting wire pole is Weaving device universal accessories, is screwed in the hole in back up pad; Resin die material is 304 stainless steels, internal diameter 11.00mm, external diameter 12.45mm, is highly 0.1-1.5mm;

Test platform is PE plate, and bracing frame, test platform are bonded together, and are of a size of 300 × 250 × 8mm, and paper tube and test platform are respectively craft paper matter pipe, paper tube and bracing frame bonding;

2, test is started:

By modified Filament-wound Machine on paper tube, guarantee enough length, follow-up resin can be carried out and extract test; Each paper tube is wound around five groups of fibrous bundles, and picks collodion by one section of loose for fiber 1cm length, ensure fiber loose end obvolvent bunchy;

Again paper tube is laterally placed on collet, by loose fibre end through the conducting wire pole of support, then through the resin die be placed on test platform, then through test platform; Five groups of fibers are repeated aforesaid operations successively, then five groups of fibers that a paper tube is wound around all are fixed on support, each support can place two paper tubes, carry out 10 groups of tests, then resin is poured in resin die, after solidification by be wound around fiber paper tube, take off from support with the mould of cured resin, use universal testing machine test fiber from resin, extract required load, substitute into formula:

$\mathrm{\σ}=\frac{F}{\mathrm{n\πdl}}$

In formula: σ-pull-out strength; F-spike protein gene load; Monofilament radical in n-tow; D-fibre diameter, l-embedded fiber degree of depth;

Calculate pull strength, wherein n, d, l all can measure and draw.